CN119778254B - Method, device, medium and equipment for identifying operation power of reciprocating compressor - Google Patents
Method, device, medium and equipment for identifying operation power of reciprocating compressor Download PDFInfo
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- CN119778254B CN119778254B CN202510246014.XA CN202510246014A CN119778254B CN 119778254 B CN119778254 B CN 119778254B CN 202510246014 A CN202510246014 A CN 202510246014A CN 119778254 B CN119778254 B CN 119778254B
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Abstract
本发明提出一种往复式压缩机的运行功率识别方法、装置、介质及设备，包括：获取检测周期内往复式压缩机中各个气缸的阀门状态信息；根据阀门状态信息与各个气缸的额定功率，确定往复式压缩机的总功率。通过阀门状态信息确定各个气缸在检测周期内的工作状态，进一步与各个气缸的额定功率进行结合，从而准确识别往复式压缩机的总功率，保障往复式压缩机的管理准确度。
The present invention proposes a method, device, medium and equipment for identifying the operating power of a reciprocating compressor, including: obtaining valve status information of each cylinder in the reciprocating compressor during a detection period; determining the total power of the reciprocating compressor according to the valve status information and the rated power of each cylinder. The working state of each cylinder during the detection period is determined by the valve status information, and further combined with the rated power of each cylinder, so as to accurately identify the total power of the reciprocating compressor and ensure the management accuracy of the reciprocating compressor.
Description
Technical Field
The invention relates to the field of compressors, in particular to a method, a device, a medium and equipment for identifying the running power of a reciprocating compressor.
Background
The reciprocating compressor is one kind of compressor with cylinder with piston inside the cylinder to change the cylinder volume periodically and realize the pressurization and transportation of gas, and belongs to the field of volumetric compressor. The reciprocating compressor drives the connecting rod through the crankshaft, the connecting rod drives the piston to move, and the working process of compressed gas can be divided into four processes of expansion, air suction, compression and air exhaust.
One of the management elements of a reciprocating compressor is the operating power, and how to identify the operating power of the reciprocating compressor during its operation is a problem of concern in the art.
Disclosure of Invention
The invention aims to provide a method, a device, a medium and equipment for identifying the operating power of a reciprocating compressor so as to solve the problems.
In order to achieve the above object, the technical scheme adopted by the embodiment of the invention is as follows:
in a first aspect, an embodiment of the present invention provides a method for identifying an operating power of a reciprocating compressor, the method comprising:
Acquiring valve state information of each cylinder in the reciprocating compressor in a detection period;
And determining the total power of the reciprocating compressor according to the valve state information and rated power of each cylinder.
In a second aspect, an embodiment of the present invention provides an operating power recognition apparatus of a reciprocating compressor, the apparatus comprising:
The first processing unit is used for acquiring valve state information of each cylinder in the reciprocating compressor in the detection period;
and the second processing unit is used for determining the total power of the reciprocating compressor according to the valve state information and the rated power of each cylinder.
In a third aspect, an embodiment of the present invention provides a storage medium having stored thereon a computer program which, when executed by a processor, implements the method described above.
In a fourth aspect, an embodiment of the present invention provides an electronic device, where the electronic device includes a processor and a memory, where the memory is configured to store one or more programs, and when the one or more programs are executed by the processor, the method is implemented.
Compared with the prior art, the method, the device, the medium and the equipment for identifying the running power of the reciprocating compressor provided by the embodiment of the invention comprise the steps of acquiring valve state information of each cylinder in the reciprocating compressor in a detection period, and determining the total power of the reciprocating compressor according to the valve state information and rated power of each cylinder. The working state of each cylinder in the detection period is determined through the valve state information and is further combined with the rated power of each cylinder, so that the total power of the reciprocating compressor is accurately identified, and the management accuracy of the reciprocating compressor is ensured.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Fig. 2 is a schematic flow chart of a method for identifying operating power of a reciprocating compressor according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of valve state transition according to an embodiment of the present invention.
Fig. 4 is a second flow chart of a method for identifying the operation power of the reciprocating compressor according to the embodiment of the invention.
Fig. 5 is an illustration of an embodiment of the present invention.
Fig. 6 is a schematic diagram of a unit of an operating power recognition apparatus of a reciprocating compressor according to an embodiment of the present invention.
In the figure, 10-processor, 11-memory, 12-bus, 13-communication interface, 701-first processing unit, 702-second processing unit.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
The power monitoring of the reciprocating compressor can be carried out from the following two dimensions, namely, the power of the DCS, the air intake and exhaust quantity and other parameters are directly utilized for monitoring, and the power of the unit can be calculated by utilizing real-time dynamic pressure, volume change and key phase data after the dynamic pressure sensor is installed on the cylinder. However, the data of the two modes are difficult to access in the monitoring of the on-site unit, and particularly the dynamic pressure sensor is complex to install, so that the change of the operation power of the reciprocating unit is difficult to obtain.
The embodiment of the invention provides a monitoring system of a reciprocating compressor, which comprises an acquisition station and a plurality of state monitoring sensors. At least one intake valve of each cylinder (working cylinder) of the reciprocating compressor needs to be provided with a condition monitoring sensor, and at least one exhaust valve of each cylinder (working cylinder) of the reciprocating compressor needs to be provided with a condition monitoring sensor.
The state monitoring sensor may be, but is not limited to, a sound sensor, a vibration sensor, an acceleration sensor, an impact pulse sensor, or the like, and the state monitoring sensor may be, but is not limited to, provided on a valve cover of the intake valve and a valve cover of the exhaust valve.
By monitoring the sound of the air valve, the impact sound of opening and closing each air valve can be clearly identified, and on a single row of the reciprocating compressor, even though the double-acting cylinder has weaker transmission effect among the impact sounds of each air valve, the sound of opening or closing the air valve is still used as the main sound, and the transmission of the other air valve opening and closing sounds to the air valve sound sensor is weaker. The impact of the air inlet valve and the air outlet valve at the opening moment is large, and the transmission of the impact sound of the valve where the sound sensor is positioned and the opening and closing sound of the other valves can be distinguished obviously. Therefore, the air displacement of the unit can be converted by utilizing the closing moment of the air inlet valve monitored by the sound sensor, the theoretical indicator diagram can be synchronously corrected, and the power of the unit can be calculated.
The state monitoring sensors are all in communication connection with the acquisition station so as to transmit the acquired valve state information to the acquisition station.
In an alternative embodiment, the monitoring system further comprises a key phase sensor and a dynamic pressure sensor.
The key phase sensor is a proximity switch type trigger sensor, is arranged on a transmission device between the motor and the crankshaft through a mounting bracket, such as near a flywheel, and is used for mounting a trigger block (such as an iron block) on the flywheel, and the key phase sensor is used for acquiring crankshaft rotation speed information and crankshaft rotation angle information. The key phase sensor is in communication connection with the acquisition station and can transmit the acquired crankshaft rotation speed information and crankshaft rotation angle information to the acquisition station.
The dynamic pressure sensor can be arranged in the cylinder pressure taking preformed hole or the air inlet valve pressure taking hole or the air outlet valve pressure taking hole through the stop valve. The dynamic pressure sensor is in communication connection with the acquisition station and is used for acquiring real-time dynamic pressure information in the cylinder and transmitting the acquired real-time dynamic pressure information in the cylinder to the acquisition station.
The acquisition station can synchronously acquire valve state information transmitted by the state monitoring sensor, real-time dynamic pressure information in the cylinder transmitted by the dynamic pressure sensor and crankshaft rotation angle information transmitted by the key phase sensor according to a signal synchronous acquisition period. The signal synchronous acquisition period corresponds to the crankshaft rotation speed information, namely, the duration of one circle of rotation of the crankshaft is determined according to the crankshaft rotation speed information and is used as the signal synchronous acquisition period.
Or when the rotation angle information of the crankshaft is a preset angle, synchronously acquiring the valve state information transmitted by the state monitoring sensor and the real-time dynamic pressure information in the cylinder transmitted by the dynamic pressure sensor.
The embodiment of the invention provides a method for identifying the operating power of a reciprocating compressor, which can accurately identify the operating power of the reciprocating compressor based on the information acquired by an acquisition station in the monitoring system. The embodiment of the invention provides electronic equipment which can be the acquisition station or a mobile phone, a computer and a server device which are in communication connection with the acquisition station. Referring to fig. 1, a schematic structure of an electronic device is shown. The electronic device comprises a processor 10, a memory 11, a bus 12. The processor 10 and the memory 11 are connected by a bus 12, the processor 10 being adapted to execute executable modules, such as computer programs, stored in the memory 11.
The processor 10 may be an integrated circuit chip with signal processing capabilities. In practice, the steps of the method for identifying the operating power of the reciprocating compressor may be performed by instructions in the form of integrated logic circuits of hardware or software in the processor 10. The Processor 10 may be a general-purpose Processor including a central processing unit (Central Processing Unit, CPU), a network Processor (Network Processor, NP), a digital signal Processor (DIGITAL SIGNAL Processor, DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable gate array (FPGA) or other Programmable logic device, discrete gate or transistor logic device, or discrete hardware components.
The memory 11 may comprise a high-speed random access memory (RAM: random Access Memory) or may further comprise a non-volatile memory (non-volatile memory), such as at least one disk memory.
Bus 12 may be ISA (Industry Standard Architecture) bus, PCI (Peripheral Component Interconnect) bus, EISA (Extended Industry Standard Architecture) bus, or the like. Only one double-headed arrow is shown in fig. 1, but not only one bus 12 or one type of bus 12.
The memory 11 is used to store a program, for example, a program corresponding to an operating power recognition device of the reciprocating compressor. The operating power recognition means of the reciprocating compressor comprises at least one software function module which may be stored in the memory 11 in the form of software or firmware (firmware) or solidified in an Operating System (OS) of the electronic device. The processor 10 executes the program to implement the operation power recognition method of the reciprocating compressor after receiving the execution instruction.
Possibly, the electronic device provided by the embodiment of the invention further comprises a communication interface 13. The communication interface 13 is connected to the processor 10 via a bus.
It should be understood that the structure shown in fig. 1 is a schematic structural diagram of only a portion of an electronic device, which may also include more or fewer components than shown in fig. 1, or have a different configuration than shown in fig. 1. The components shown in fig. 1 may be implemented in hardware, software, or a combination thereof.
The method for identifying the operating power of the reciprocating compressor provided by the embodiment of the invention can be applied to the electronic equipment shown in fig. 1, and is particularly applicable to the flow, referring to fig. 2, of the reciprocating compressor, wherein the method for identifying the operating power of the reciprocating compressor comprises the following steps of S10 and S20.
S10, valve state information of each cylinder in the reciprocating compressor in a detection period is obtained.
The valve state information may be information monitored by state monitoring sensors disposed on valve covers of intake valves and valve covers of exhaust valves of the cylinders.
When the condition monitoring sensor is a sound sensor, the sound sensor may be disposed adjacent to the intake valve and the exhaust valve.
And S20, determining the total power of the reciprocating compressor according to the valve state information and the rated power of each cylinder.
In an alternative embodiment, the reciprocating compressor employs a stepless air flow regulating system to regulate the intake valve closing time of each cylinder, thereby controlling the amount of air involved in compression. The stepless air quantity regulating system can realize the stepless regulation of the power of the unit from 0% -100%.
On the basis, with regard to the content in the step S20, the embodiment of the present invention also provides an alternative implementation, please refer to the following step S20, which includes the steps of determining the total power of the reciprocating compressor according to the valve status information and the rated power of each cylinder, including the steps S21, S22, S23 and S24, which are specifically described below.
S21, determining the closing time of the air inlet valve of the cylinder in the detection period according to the valve state information.
Referring to fig. 3, fig. 3 is a schematic diagram illustrating a valve state transition according to an embodiment of the invention. In the figure, TDC is the top dead center of the cover corresponding to the piston motion, namely the top end position of the cylinder head of the cylinder is reached by the piston, the rotation angle of the crankshaft corresponding to the top dead center of the cover is 0 degrees, BDC is the bottom dead center of the shaft corresponding to the piston motion, namely the bottom dead center of the crankshaft is reached by the piston, and the rotation angle of the crankshaft corresponding to the bottom dead center of the shaft is 180 degrees. M1 is the exhaust valve closing time point, M2 is the intake valve opening time point, M3 is the intake valve standard closing time point without delay, M4 is the intake valve delayed closing time point, and M5 is the exhaust valve opening time point. The expansion phase of the cylinder is from the cycle start time (the time when the crank rotation angle is 0 ° (also referred to as TDC time) to M2, the intake phase of the cylinder is from M2 to BDC, the compression phase of the cylinder is from M3 to M5, and the exhaust phase of the cylinder is from M5 to the cycle end time (the time when the crank rotation angle is 360 °).
In the figure, t 1 denotes a time period from a time point at which the crank angle is 180 ° (also referred to as BDC time point) to M3, L 1 is a piston stroke in the time period t 1, and θ 1 is the crank angle in the time period t 1.
In the figure, t 2 denotes a time period from a time point at which the crank angle is 180 ° (also referred to as BDC time point) to M4, L 2 is a piston stroke in the time period t 2, and θ 2 is the crank angle in the time period t 2.
In the figure, t represents the length of time taken for a single compression and exhaust stroke, that is, the length of time from BDC to TDC, L is the total stroke of the cylinder, and θ is the crank angle (180 °) in the period of t.
As can be seen from fig. 3, under normal conditions, the stepless air quantity adjusting system adjusts the closing time of the air inlet valve of each cylinder, namely, M4 is changed, so as to control the air quantity participating in compression and influence the power of the cylinder. It is necessary to perform S21 to determine the intake valve closing time of the cylinder in the detection period based on the valve state information.
When the occurrence states of the intake valve and the exhaust valve of the cylinder are switched, the corresponding valve state information can be subjected to severe fluctuation, and the valve impact sound can be more remarkable. Therefore, by analyzing the fluctuation range of the valve state information, it is possible to determine whether or not the state switching of the intake valve and the exhaust valve of the cylinder has occurred, and the timing of the occurrence state switching of the intake valve and the exhaust valve of the cylinder is recorded, so that it is possible to determine the exhaust valve closing time point M1, the intake valve opening time point M2, the intake valve retard closing time point M4, and the exhaust valve opening time point M5.
The air valve is used as a wearing part in the reciprocating compressor, and has the advantages of more quantity and higher failure rate. The air valve consists of a valve seat, a valve cover, a valve plate, a spring, a nut and the like, and the opening and closing actions of the air valve are realized through the pressure difference of the two sides of the valve plate of the air valve. The air valve can bear larger impact load at the moment of opening and closing, the reciprocating compressor runs for one circle, and the air inlet valve and the air outlet valve are opened and closed once respectively.
In an alternative embodiment, before S21, it may be determined whether the number of times of occurrence of severe fluctuation of the valve state information corresponding to the intake valve of the cylinder in the detection period is 2, and it is determined whether the number of times of occurrence of severe fluctuation of the valve state information corresponding to the exhaust valve of the cylinder in the detection period is 2, if both are 2, it is indicated that the valve switch state in the detection period is normal, S21 may be executed, otherwise, it is indicated that the valve fails. The severe fluctuation refers to fluctuation with fluctuation amplitude larger than preset amplitude.
S22, determining the piston stroke of the cylinder in the delayed closing period according to the closing time of the air inlet valve of the cylinder in the detection period.
Wherein the late closing period is a period from the end of cylinder intake to the intake valve closing time of the cylinder, or the late closing period is a period from the time when the piston of the cylinder moves to the shaft bottom dead center to the intake valve closing time of the cylinder.
Optionally, the step of determining the piston stroke of the cylinder in the delayed closing period based on the intake valve closing time of the cylinder in the detection period S22 includes S221 and S222, which are described in detail below.
S221, determining the rotation angle of the crankshaft in the delayed closing period according to the closing time of the air inlet valve of the cylinder in the detection period.
In the reciprocating compressor, the crankshaft drives the connecting rod, the connecting rod drives the piston in the cylinder to move, and the piston stroke is related to the rotation angle of the crankshaft in the delayed closing period t 2, so that the rotation angle of the crankshaft in the delayed closing period needs to be acquired.
The key phase sensor key may collect crankshaft rotational speed information and crankshaft rotational angle information. The crank rotation angle of the reciprocating machine during the delayed closing period may be determined by the crank rotation speed information during the delayed closing period t 2 and the time length of the delayed closing period t 2. The crank angle at the delayed closing period may also be determined by subtracting the crank angle at the BDC from the crank angle corresponding to the M4 time.
S222, determining the piston stroke of the cylinder in the delayed closing period according to the rotation angle of the crankshaft, the crank radius of the crankshaft and the total stroke of the cylinder.
Optionally, the cover side cylinder's piston stroke in the delayed closing period is calculated as:
;
Wherein, the Indicating the stroke of the piston and,Indicating the radius of the crank throw of the crankshaft,Indicating the rotation angle of the crankshaft,Indicating the total stroke of the cylinder.
S23, determining the actual power of the cylinder according to the piston stroke, the rated power of the cylinder and the total stroke of the cylinder.
Optionally, the actual power of the cylinder is calculated as:
;
Wherein, the Indicating the actual power of the cylinder,Indicating the rated power of the cylinder,Indicating the stroke of the piston and,Indicating the total stroke of the cylinder.
S24, determining the total power of the reciprocating compressor according to the actual power of each cylinder.
Alternatively, the sum of the actual power of the individual cylinders is taken as the total power of the reciprocating compressor.
At present, the reciprocating compressor is reformed towards the energy-saving direction, wherein more applications are an unloading valve regulating system and a stepless air quantity regulating system, the stepless air quantity regulating system can realize the stepless power regulation of the power of a unit from 0% -100%, and the stepless air quantity regulating system is applied to a plurality of units. After the dynamic pressure sensor is installed, the actual indicator diagram of the unit is changed synchronously, so that the actually displayed indicator diagram has larger deviation compared with the indicator diagram in a full power state, if the indicator diagrams in different powers are all applied, the theoretical indicator diagram corresponding to the actual indicator diagram and the change degree of the actual power of the unit need to be obtained, otherwise, the reference meaning of various indexes calculated by using the actual indicator diagram is not great, and if the indicator diagrams in different powers and various indexes calculated by using the indicator diagram are meaningful, the calculated index data need to be subjected to split-working condition management and normalization processing by using the unit power at corresponding moments, so that the indexes are convenient to monitor later.
Reciprocating machine monitoring systems often use data such as vibration, displacement, dynamic pressure, key phase, sound, etc. to monitor the equipment. However, for the air quantity regulation type unit of the air inlet valve, after the power change, the actual indicator diagram can be changed synchronously, on the premise of no accurate time and accurate pressure of the closing moment of the air inlet valve, the theoretical indicator diagram is difficult to correct synchronously, the calculation of other thermodynamic indexes can be greatly influenced, and on the premise that the control signal of the DCS or the air quantity control system cannot be externally connected, the monitoring system cannot know the power change of the compressor, and the indicator diagram cannot be corrected and corresponding indexes are calculated.
On this basis, the embodiment of the invention also provides an alternative implementation, please refer to fig. 4, and the operation power recognition method of the reciprocating compressor further comprises S30, S40 and S30, which are specifically described below.
S30, acquiring crankshaft rotation angle information of each cylinder in the reciprocating compressor in a detection period and real-time dynamic pressure information inside the cylinder.
And S40, drawing a pressure indicator diagram of the cylinder in an actual state according to the crank rotation angle information of the reciprocating machine in the detection period and the real-time dynamic pressure information in the cylinder.
Because the area enclosed by the pressure indicator diagram (also called as PV diagram) is directly related to the unit power, the actual PV diagram after the air quantity adjustment can be drawn according to the crank rotation angle information of the reciprocating machine in the detection period and the real-time dynamic pressure information inside the cylinder.
When the theoretical pressure indicator diagram corresponding to the pressure indicator diagram in the actual state is required to be described, the theoretical pressure indicator diagram cannot be drawn. Referring to fig. 5, fig. 5 is a diagram of an embodiment of the present invention. The corresponding relation between FIG. 5 and FIG. 3 is A: M1, B: M2, cr: M4, dr: M5.
Under the condition of no delay, the pressure indicator diagram in the actual state is the area surrounded by A-B-C-D, under the condition of delay, the pressure indicator diagram in the actual state is the area surrounded by A-B-Cr-Dr, and the distance from C to Cr is the piston stroke L 2. In the figure, pa1 represents the intake pressure (pressure in the intake pipe), and Pa2 represents the exhaust pressure (pressure in the exhaust pipe).
The theoretical pressure indicator diagram (the area surrounded by A-B-C-D ') in the original full power state is not applicable any more and needs to be adjusted, so that S50 is executed to obtain the adjusted theoretical pressure indicator diagram (the area surrounded by A-B-Cr-Dr').
S50, adjusting a theoretical pressure indicator diagram of the cylinder according to the piston stroke.
According to the principle of stepless air quantity regulation, the delay closing time point M4 of the air inlet valve corresponds to the piston stroke position Cr, and simultaneously, the real-time cylinder pressure and volume can be obtained, so that the theoretical indicator diagram under the power can be drawn according to the Cr position. Cr position corresponds to the position of the piston and in-cylinder pressure can be acquired in real time according to key phase and pressure data.
The reciprocating compressor can regulate the power of the unit only through the full opening of the air inlet valve, for example, the unit has 4 air inlet valves and 4 air outlet valves (double-acting cylinders, one side is 1 in 1 row), the unit power is regulated to 50%, 2 air inlet valves are required to be opened, the two air inlet valves are controlled to be in a normally open state, namely, the corresponding air cylinders of the two air inlet valves do not work, and all inhaled air is discharged. For a single cylinder, the power of a single cylinder only has two states of 100% full power and 0% no-load.
In this case, regarding the content in S20, an alternative implementation manner is also provided in the embodiment of the present invention, please refer to the following. And S20, determining the total power of the reciprocating compressor according to the valve state information and the rated power of each cylinder, wherein the steps comprise S25, S26 and S27, and the specific description is as follows.
S25, determining whether the air inlet valve opening time, the air inlet valve closing time, the air outlet valve opening time and the air outlet valve closing time of the cylinder in the detection period are detected according to the valve state information.
It should be appreciated that when the intake valve of the cylinder is normally open, the exhaust valve of the cylinder is normally closed, and there is no state switch.
S26, under the condition that detection can be carried out, the cylinder is a working cylinder, and the air inlet and outlet valves are normally opened and closed in a detection period.
And S27, determining the total power of the reciprocating compressor according to the rated power of all working cylinders.
Alternatively, the sum of the rated powers of all working cylinders is determined as the total power of the reciprocating compressor.
The start point and the end point of the detection period may be determined based on the crank rotation angle information acquired by the key phase sensor. The time at which the crank rotation angle of 0 ° is detected is determined as the start point of the detection period, and the time at which the crank rotation angle of 360 ° is detected is determined as the end point of the detection period. The start point and the end point of two adjacent detection periods overlap.
In the monitoring system of the reciprocating compressor, vibration of the reciprocating compressor is mainly based on periodic impact generated by components such as an air valve and a cross head, and a large number of anomalies are also shown at running impact time, so that the dependence of diagnosis and analysis on the accurate position of the periodic impact is strong, and after a key phase sensor fails, the time of impact generated by each air valve is very difficult to position, so that the analysis of data is very unfavorable. The state monitoring sensor (which can be but is not limited to a sound sensor) can be used for monitoring the air valves, and the opening and closing states of the air valves can be directly monitored, so that even if key phase data fail, the sequence of the air valve impact and the occurrence time can be used for detecting the opening time, the closing time, the opening time and the closing time of the air valve of the air cylinder in a period to accurately position each impact in the unit, and the waveform analysis of the reciprocating compressor is simplified in turn.
Referring to fig. 6, fig. 6 is a schematic diagram showing an apparatus for identifying operating power of a reciprocating compressor according to an embodiment of the present invention, and optionally, the apparatus for identifying operating power of a reciprocating compressor is applied to the electronic device described above.
The operating power recognition device of the reciprocating compressor includes a first processing unit 701 and a second processing unit 702.
The first processing unit is used for acquiring valve state information of each cylinder in the reciprocating compressor in the detection period;
and the second processing unit is used for determining the total power of the reciprocating compressor according to the valve state information and the rated power of each cylinder.
Alternatively, the first processing unit 701 may perform S10 and S30 described above, and the second processing unit 702 may perform S20, S40, and S50 described above.
It should be noted that, the operation power identifying device for a reciprocating compressor provided in this embodiment may execute the method flow shown in the method flow embodiment to achieve the corresponding technical effects. For a brief description, reference is made to the corresponding parts of the above embodiments, where this embodiment is not mentioned.
The embodiment of the invention also provides a storage medium storing computer instructions and programs which when read and run perform the method for identifying the operating power of the reciprocating compressor of the embodiment. The storage medium may include memory, flash memory, registers, combinations thereof, or the like.
The electronic device may be the above-mentioned acquisition station, or a mobile phone, a computer and a server device which are in communication connection with the acquisition station. The electronic equipment is shown in fig. 1, and can realize the method for identifying the operation power of the reciprocating compressor, and specifically, the electronic equipment comprises a processor 10, a memory 11 and a bus 12. The processor 10 may be a CPU. The memory 11 is used to store one or more programs that, when executed by the processor 10, perform the operating power recognition method of the reciprocating compressor of the above-described embodiment.
In summary, the method, the device, the medium and the equipment for identifying the operation power of the reciprocating compressor provided by the embodiment of the invention comprise the steps of acquiring valve state information of each cylinder in the reciprocating compressor in a detection period, and determining the total power of the reciprocating compressor according to the valve state information and rated power of each cylinder. The working state of each cylinder in the detection period is determined through the valve state information and is further combined with the rated power of each cylinder, so that the total power of the reciprocating compressor is accurately identified, and the management accuracy of the reciprocating compressor is ensured.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (7)
1. A method of operating power identification for a reciprocating compressor, the method comprising:
Acquiring valve state information of each cylinder in the reciprocating compressor in a detection period;
Determining the total power of the reciprocating compressor according to the valve state information and rated power of each cylinder;
the step of determining the total power of the reciprocating compressor according to the valve state information and rated power of each cylinder comprises the following steps:
Determining the closing time of an air inlet valve of an air cylinder in the detection period according to the valve state information;
Determining the piston stroke of the cylinder in a delayed closing period according to the closing time of the air inlet valve of the cylinder in the detection period, wherein the delayed closing period is a period from the end of air suction of the cylinder to the closing time of the air inlet valve of the cylinder;
determining the actual power of the cylinder according to the piston stroke, the rated power of the cylinder and the total stroke of the cylinder;
Determining the total power of the reciprocating compressor according to the actual power of each cylinder;
the step of determining the piston stroke of the cylinder in the delayed closing period according to the closing time of the air inlet valve of the cylinder in the detection period comprises the following steps:
determining a crankshaft rotation angle in a delayed closing period according to the closing time of an air inlet valve of the air cylinder in the detection period;
And determining the piston stroke of the cylinder in the delayed closing period according to the rotation angle of the crankshaft, the crank radius of the crankshaft and the total stroke of the cylinder.
2. The operating power recognition method of a reciprocating compressor as claimed in claim 1, wherein the piston stroke of the cylinder in the delayed closing period is calculated as:
;
Wherein, the Indicating the stroke of the piston in question,Representing the radius of the crank throw of the crankshaft,Indicating the rotation angle of the crankshaft,Indicating the total stroke of the cylinder.
3. The operating power recognition method of a reciprocating compressor as claimed in claim 1, wherein the actual power of the cylinder is calculated as:
;
Wherein, the Representing the actual power of the cylinder in question,Indicating the rated power of the cylinder,Indicating the stroke of the piston in question,Indicating the total stroke of the cylinder.
4. The operating power recognition method of a reciprocating compressor as claimed in claim 1, wherein the method further comprises:
acquiring crankshaft rotation angle information of each cylinder in the reciprocating compressor and real-time dynamic pressure information inside the cylinder in the detection period;
drawing a pressure indicator diagram of the cylinder in an actual state according to the crank rotation angle information of the reciprocating machine in the detection period and the real-time dynamic pressure information inside the cylinder;
And adjusting a theoretical pressure indicator diagram of the cylinder according to the piston stroke.
5. An operating power recognition apparatus of a reciprocating compressor, the apparatus comprising:
The first processing unit is used for acquiring valve state information of each cylinder in the reciprocating compressor in the detection period;
The second processing unit is used for determining the total power of the reciprocating compressor according to the valve state information and rated power of each cylinder;
The reciprocating compressor adopts a stepless air quantity regulating system to regulate the closing time of an air inlet valve of each cylinder, and the total power of the reciprocating compressor is determined according to the valve state information and the rated power of each cylinder, and comprises the steps of determining the closing time of the air inlet valve of the cylinder in the detection period according to the valve state information, determining the piston stroke of the cylinder in a delayed closing period according to the closing time of the air inlet valve of the cylinder in the detection period, wherein the delayed closing period is a period from the end of air suction of the cylinder to the closing time of the air inlet valve of the cylinder, determining the actual power of the cylinder according to the piston stroke, the rated power of the cylinder and the total stroke of the cylinder, and determining the total power of the reciprocating compressor according to the actual power of each cylinder;
The method comprises the steps of determining the piston stroke of the cylinder in the delayed closing period according to the closing time of the air inlet valve of the cylinder in the detection period, determining the rotation angle of the crankshaft in the delayed closing period according to the closing time of the air inlet valve of the cylinder in the detection period, and determining the piston stroke of the cylinder in the delayed closing period according to the rotation angle of the crankshaft, the crank radius of the crankshaft and the total stroke of the cylinder.
6. A computer readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, implements the method according to any of claims 1-4.
7. An electronic device comprising a processor and a memory for storing one or more programs, which when executed by the processor, implement the method of any of claims 1-4.
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| CN107917069A (en) * | 2016-10-11 | 2018-04-17 | 通用电气公司 | Reciprocating compressor sensing flux |
| CN117989122A (en) * | 2022-11-04 | 2024-05-07 | 中国石油化工股份有限公司 | Method and system for monitoring energy efficiency of reciprocating compressor unit in real time, electronic equipment and storage medium |
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| US20150030465A1 (en) * | 2013-07-23 | 2015-01-29 | Chevron U.S.A. Inc. | Methods and systems for real-time monitoring and optimizing the performance of reciprocating compressors |
| CN114781459B (en) * | 2022-05-11 | 2025-07-29 | 山东科技大学 | Fault diagnosis visualization method for reciprocating compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107917069A (en) * | 2016-10-11 | 2018-04-17 | 通用电气公司 | Reciprocating compressor sensing flux |
| CN117989122A (en) * | 2022-11-04 | 2024-05-07 | 中国石油化工股份有限公司 | Method and system for monitoring energy efficiency of reciprocating compressor unit in real time, electronic equipment and storage medium |
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