CN108561220A - The cooling device of engineering truck, the control method of cooling device and engineering truck - Google Patents

Abstract

The invention discloses the control methods and engineering truck of a kind of cooling device of engineering truck, cooling device.Cooling device includes at least two radiating modules being arranged independently of one another.Radiating module includes radiator and fan, and fan is correspondingly arranged with radiator.Fan and radiator are correspondingly arranged by the cooling device of the engineering truck of the present invention, so that when radiator has radiating requirements, fan work corresponding with the radiator, therefore compared with prior art, the power of the fan of each radiating module can be arranged smaller, it is more targetedly cooled down, therefore reduces the energy consumption of entire cooling device.In addition, the power of fan reduces so that the diameter of fan reduces, to reduce noise.

Description

Cooling device for construction vehicle, control method for cooling device, and construction vehicle

technical field

The invention relates to the technical field of vehicles, in particular to a cooling device for an engineering vehicle, a control method for the cooling device and the engineering vehicle.

Background technique

Construction vehicles have been widely used in fields such as agricultural production and industrial construction, and are indispensable construction machinery. Due to the harsh working conditions of engineering vehicles, each component often works at full load for a long time or even overloads, resulting in easy heating. Therefore, in order to ensure the normal operation and service life of each component, the engineering vehicle needs to have a better heat dissipation system.

At present, the heat dissipation system of engineering vehicles mainly adopts two control forms: direct-connected and hydraulically driven cooling fans. The valve is used to control the flow of the hydraulic motor, so as to achieve the purpose of controlling the speed of the cooling fan. Specifically, different currents can be output according to control parameters such as engine water temperature and torque converter oil temperature, so as to realize heat dissipation of various components. However, since the heat dissipation system in the prior art has only one cooling fan for the heat dissipation of each component, and the heat dissipation requirements of each component are different, it cannot meet the heat dissipation requirements of each component in a targeted manner and will cause waste of resources. For example, when the engine water temperature is high, the cooling fan needs to run at a high speed, but the torque converter oil temperature does not require the cooling fan to run at a high speed, so the cooling fan keeps running at a high speed, resulting in waste of resources.

Contents of the invention

The object of the present invention is to provide a cooling device for an engineering vehicle, a control method for the cooling device and the engineering vehicle, so as to reduce energy consumption.

The first aspect of the present invention provides a cooling device for an engineering vehicle, which includes at least two heat dissipation modules independently arranged with each other, the heat dissipation module includes a radiator and a fan, and the fan is arranged correspondingly to the radiator.

In some embodiments, the cooling module further includes a motor for driving the fan to rotate and a hydraulic control unit for driving the motor to rotate.

In some embodiments, the hydraulic control unit includes a reversing valve for controlling the steering of the motor. In the first working position, the reversing valve controls the motor to rotate in the forward direction; in the second working position, the reversing valve controls the motor to rotate in the reverse direction. .

In some embodiments, the cooling device includes a hydraulic pump, and the hydraulic pump is connected to the oil inlet of the hydraulic control unit of each heat dissipation module to supply oil to the hydraulic control unit of each heat dissipation module.

In some embodiments, the heat dissipation module further includes a temperature sensor corresponding to the radiator and used to measure the temperature of the flowing medium in the radiator, the cooling device includes a controller coupled with the temperature sensor, and the controller measures the temperature according to the temperature sensor The temperature controls the speed and/or direction of the fan.

In some embodiments, the cooling device further includes a fault diagnosis unit, and the fault diagnosis unit is used to monitor the working status of each component of the cooling device in real time.

In some embodiments, the at least two heat dissipation modules include an engine water cooling heat dissipation module for heat dissipation of the engine, an intercooler heat dissipation module for heat dissipation of the intake air temperature of the engine, and an intercooler heat dissipation module for heat dissipation of the transmission system of the engine. The transmission cooling module and the hydraulic oil cooling module used for cooling the hydraulic system of the engine.

In some embodiments, the cooling device further includes an indicator light, which is used to prompt the operating status of the cooling device.

The second aspect of the present invention provides a control method for controlling the cooling device of the engineering vehicle in the first aspect of the present invention, comprising the following steps:

Determine whether the actual temperature of the flowing medium in the radiator is within the set temperature range;

If the actual temperature is lower than the lowest value of the set temperature range, control the reverse rotation of the fan to achieve the dust removal function; if the actual temperature is within the set temperature range, control the forward rotation of the fan to achieve the cooling function; if the actual temperature is greater than the highest value of the set temperature range, an alarm will be issued Signal.

A third aspect of the present invention provides an engineering vehicle, including the cooling device for an engineering vehicle as provided in the first aspect of the present invention.

Based on the engineering vehicle cooling device, the cooling device control method and the engineering vehicle provided by the present invention, the cooling device includes at least two heat dissipation modules independently arranged. The cooling module includes a radiator and a fan, and the fan and the radiator are arranged correspondingly. The cooling device of the engineering vehicle of the present invention sets the fans corresponding to the radiators, so that when the radiators have heat dissipation requirements, the fans corresponding to the radiators work, so compared with the prior art, the power of the fans of each heat dissipation module can be With smaller settings, the cooling is more targeted and thus reduces the energy consumption of the entire cooling installation. In addition, the reduced power of the fan allows the diameter of the fan to be reduced, thereby reducing noise.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 is a schematic structural view of a cooling device of an engineering vehicle in a cooling state according to an embodiment of the present invention;

Fig. 2 is a structural schematic diagram of the cooling device shown in Fig. 1 when it is in a dust removal state.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authorized Specification. In all examples shown and discussed herein, any specific values should be construed as illustrative only, and not as limiting. Therefore, other examples of the exemplary embodiment may have different values. It should be noted that like numbers and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further discussion in subsequent figures.

For the convenience of description, spatially relative terms may be used here, such as "on ...", "over ...", "on the surface of ...", "above", etc., to describe the The spatial positional relationship between one device or feature shown and other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, devices described as "above" or "above" other devices or configurations would then be oriented "beneath" or "above" the other devices or configurations. under other devices or configurations". Thus, the exemplary term "above" can encompass both an orientation of "above" and "beneath". The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

The cooling device for an engineering vehicle according to the embodiment of the present invention includes at least two heat dissipation modules that are arranged independently of each other. The cooling module includes a radiator and a fan, and the fan and the radiator are arranged correspondingly. The cooling device of the engineering vehicle sets the fans corresponding to the radiators, so that when the radiators have cooling requirements, the fans corresponding to the radiators work. Therefore, compared with the prior art, the power of the fans of each cooling module can be set to Smaller, more targeted cooling, thus lowering the energy consumption of the entire cooling unit. In addition, the reduced power of the fan allows the diameter of the fan to be reduced, thereby reducing noise.

The structure and working process of the cooling device of a specific embodiment of the present invention will be described in detail below according to FIG. 1 and FIG. 2 .

As shown in FIG. 1 , the cooling device of this embodiment includes four heat dissipation modules arranged independently of each other. The four heat dissipation modules are the engine water cooling heat dissipation module 4 for heat dissipation of the engine, the intercooler heat dissipation module 5 for heat dissipation of the intake air temperature of the engine, and the transmission heat dissipation module for heat dissipation of the transmission system of the engine. Module 6 and hydraulic oil cooling module 7 for cooling the hydraulic system of the engine. Moreover, each heat dissipation module includes a heat sink and a fan, so the power of the fan of each heat dissipation module can be set to be smaller, and the cooling can be performed in a more targeted manner, thereby reducing the energy consumption of the entire cooling device. In addition, the power of the fan is reduced so that the diameter of the fan is reduced, thereby reducing noise.

It has been verified by experiments that the cooling device of this embodiment can save energy by at least 5%, and reduce external radiated noise by at least 3dB.

Specifically, the structure and working process of each heat dissipation module in this embodiment are roughly the same, so the structure and working process of the engine water cooling heat dissipation module 4 will be described below as an example, and the structures of other heat dissipation modules will not be repeated. In other embodiments not shown in the drawings, the structures of each cooling module can be set differently, as long as it includes a radiator and a fan corresponding to the radiator.

As shown in FIG. 1 , the engine water cooling module 4 of this embodiment includes a water cooling radiator 41 and a water cooling fan 42 .

The engine water cooling module 4 also includes a motor for driving the water cooling fan and a hydraulic control unit for driving the motor. The hydraulic control unit controls the rotation speed and/or rotation direction of the motor according to the heat dissipation requirement of the water-cooled radiator 41 .

Specifically, the hydraulic control unit includes a reversing valve 43 for controlling the steering of the motor. As shown in FIG. 1, in the first working position, the reversing valve 43 controls the forward rotation of the motor; as shown in FIG. In the working position, the reversing valve 43 controls the reverse rotation of the motor.

In order to control the rotational speed of the motor and thus the rotational speed of the fan, the hydraulic control unit of this embodiment further includes an electric proportional valve 44 for controlling the oil intake of the motor. The electric proportional valve 44 is arranged between the oil inlet of the hydraulic control unit and the oil inlet of the reversing valve 43 .

In this embodiment, the cooling device further includes a hydraulic pump 12, and the hydraulic pump 12 is connected to the oil inlet of the hydraulic control unit of each heat dissipation module to supply oil to the hydraulic control unit of each heat dissipation module. The oil inlet of the hydraulic pump 12 is connected to the oil tank 13, and the oil outlet of the hydraulic pump 12 is connected to the oil inlet of the hydraulic control unit of each cooling module to supply oil to each hydraulic control unit. The cooling device of this embodiment uses one hydraulic pump 12 to supply oil to each hydraulic control unit, so that the structure of the cooling device is simple.

Preferably, in order to prevent the oil pressure of the hydraulic control unit from being too high, the cooling device in this embodiment further includes an overflow valve 11 connected to the oil outlet of the hydraulic pump 12 . The overflow pressure of the overflow valve 11 is adjustable.

In order to prevent the hydraulic control unit from being sucked, the hydraulic control unit of this embodiment further includes a one-way valve 45 disposed between the oil inlet port of the electric proportional valve 14 and the oil tank. The one-way valve 45 allows oil to flow from the oil tank to the oil inlet of the electro-proportional valve 14 .

In order to control the temperature of the engine of the engineering vehicle in real time, the engine water cooling module 4 of this embodiment also includes a temperature sensor 3 corresponding to the water cooling radiator 41 and used to measure the temperature of the flowing medium in the water cooling radiator 41 . The cooling device includes a controller 2 coupled with a temperature sensor 3 , and the controller 2 controls the rotation speed and/or direction of rotation of the fan according to the temperature measured by the temperature sensor 3 .

Specifically, the controller 2 controls the working position of the reversing valve 43 in the hydraulic control unit according to the temperature measured by the temperature sensor 3 to control the steering of the fan. The controller 2 controls the magnitude of the control current of the electric proportional valve 44 in the hydraulic control unit according to the temperature measured by the temperature sensor 3 to control the speed of the fan.

As shown in FIG. 1 and FIG. 2 , the controller 2 is electrically connected with the reversing valve 43 and the electric proportional valve 44 to control their actions. The cooling device of this embodiment also includes a power supply device 1 for supplying power to the controller 2 .

In some embodiments, the cooling device further includes a fault diagnosis unit 8, which is used to monitor and/or display the working status of each component of the cooling device in real time.

Specifically, since each component of the cooling device is coupled with the controller 2, the controller 2 detects the working status of each component of the cooling device in real time. When any component of the cooling device is short-circuited, disconnected or damaged, the controller 2 will send fault information to the fault diagnosis unit 8 . The fault diagnosis unit 8 is used to display fault points and fault types in real time, so that the staff can check and deal with them in time and improve efficiency.

The fault diagnosis unit 8 includes a display screen.

In other embodiments, the fault diagnosis unit 8 can also be directly coupled with each component to directly automatically detect the working status of each component and accurately judge the fault point and fault type when the relevant component fails, and prompt the relevant staff information.

In other embodiments, the cooling device further includes an indicator light 9, which is used to prompt the operating state of the cooling device.

This embodiment also provides an engineering vehicle, including the cooling device for the engineering vehicle in the above embodiment.

The working process of the cooling device of the present embodiment is as follows:

After the engineering vehicle is started, the cooling device first performs a self-check to check whether each component is faulty, and after confirming that each component is faultless, the controller 2 performs temperature judgment. Each heat dissipation module judges independently, that is, judges the temperature measured by the temperature sensors of the engine water cooling module 4, the intercooler heat dissipation module 5, the transmission heat dissipation module 6 and the hydraulic oil heat dissipation module 7 and controls the corresponding components to operate. For example, when the actual temperature is lower than the lowest value of the set temperature range, as shown in FIG. 2 , the controller sends a signal to control the reversing valve 43 to be in the lower position so that the fan operates in reverse to realize the dust removal function. After the fan reverses for a certain period of time, the fan is controlled to run forward. At this time, when the actual temperature is still lower than the lowest value of the set temperature, the fan is controlled to run at idle speed; when the actual temperature is higher than the lowest value of the set temperature range and lower than the set temperature When the range is at the highest value, as shown in FIG. 1 , the controller sends a signal to control the reversing valve 43 to be in the upper position and controls the control current of the electric proportional valve 44 so that the fan rotates forward to realize the cooling function. When the actual temperature is higher than the maximum value of the set temperature range, the controller sends out an alarm signal.

Specifically taking the engine water cooling module 4 as an example, if the temperature sensor 3 detects that the engine water temperature has not reached the minimum value of the set temperature range, the controller 2 outputs a current signal to drive the electric proportional valve 44 and the reversing valve 43 to make the motor run in reverse. Thereby the fan performs the reverse function to remove dust. If during the reversing process, if the temperature sensor 3 detects that the water temperature has not reached the lowest value of the set temperature range, the fan will stop in the reverse direction for two minutes. To run, perform forward function for cooling. At the same time, the water temperature of the engine radiator is judged. If the engine water temperature does not reach the lowest value of the set temperature range, the fan is kept running at a positive idle speed. Otherwise, the control current of the electric proportional valve 44 is controlled to make the fan speed run proportionally. . If the engine water temperature exceeds the maximum value of the set temperature range, an alarm will be issued.

Similarly, the control methods of the intercooler heat dissipation module 5 , the transmission heat dissipation module 6 and the hydraulic oil heat dissipation module 7 are the same as those of the engine water cooling heat dissipation module 4 , and each operates independently.

When there is a short circuit, open circuit or damage to each component in the cooling device, the controller 2 will automatically detect and accurately judge the fault point and fault type, and send the fault code to the fault diagnosis unit 8, so that the staff can obtain it in time All kinds of information and timely processing, improve efficiency.

To sum up, it can be seen that the radiators of each heat dissipation module of the cooling device in the embodiment of the present invention are equipped with corresponding fans, so the power of each fan can be set to be small, and each fan can be independently controlled, thereby effectively saving energy and reducing noise . Moreover, since the diameter of the fan blades of each heat dissipation module is reduced, the driving force is also reduced. Therefore, when the fan is switched on and off and forward and reverse, the impact on the fan shaft and blades is greatly reduced, thereby prolonging the service life.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: the present invention can still be Modifications to the specific implementation of the invention or equivalent replacement of some technical features; without departing from the spirit of the technical solution of the present invention, should be included in the scope of the technical solution claimed in the present invention.

Claims (10)

1. A cooling device for an engineering vehicle, characterized in that it includes at least two heat dissipation modules independently arranged with each other, the heat dissipation module includes a radiator and a fan, and the fan is arranged correspondingly to the radiator. 2 . The cooling device for an engineering vehicle according to claim 1 , wherein the heat dissipation module further comprises a motor for driving the fan to rotate and a hydraulic control unit for driving the motor to rotate. 3 . 3. The cooling device for engineering vehicles according to claim 2, wherein the hydraulic control unit includes a reversing valve for controlling the steering of the motor, and in the first working position, the reversing valve controls The motor rotates in the forward direction; in the second working position, the reversing valve controls the motor to rotate in the reverse direction. 4. The cooling device of an engineering vehicle according to claim 2, wherein the cooling device comprises a hydraulic pump, and the hydraulic pump is connected to the oil inlet of the hydraulic control unit of each heat dissipation module so that each Oil is supplied to the hydraulic control unit of the cooling module. 5. The cooling device for an engineering vehicle according to any one of claims 1 to 4, wherein the heat dissipation module further includes a device corresponding to the radiator and used for measuring the flow medium in the radiator The cooling device includes a controller coupled with the temperature sensor, and the controller controls the rotation speed and/or direction of rotation of the fan according to the temperature measured by the temperature sensor. 6. The cooling device for an engineering vehicle according to any one of claims 1 to 4, characterized in that the cooling device further comprises a fault diagnosis unit for real-time monitoring of each of the cooling devices The working state of the component. 7. The cooling device of an engineering vehicle according to any one of claims 1 to 4, characterized in that, the at least two heat dissipation modules include an engine water cooling heat dissipation module for cooling the engine, and an engine water cooling module for cooling the engine. The intercooler cooling module for cooling the intake air temperature, the transmission cooling module for cooling the transmission system of the engine, and the hydraulic oil cooling module for cooling the hydraulic system of the engine. 8. The cooling device for an engineering vehicle according to any one of claims 1 to 4, characterized in that the cooling device further comprises an indicator light, which is used to prompt the operating state of the cooling device. 9. A control method for controlling the cooling device of an engineering vehicle according to any one of claims 1 to 8, characterized in that it comprises the following steps: judging whether the actual temperature of the flowing medium in the radiator is within the set temperature range; If the actual temperature is less than the lowest value of the set temperature range, control the fan to reverse to realize the dust removal function; if the actual temperature is within the set temperature range, control the fan to rotate forward to realize the cooling function; if The actual temperature is greater than the maximum value of the set temperature range, and an alarm signal is sent. 10. An engineering vehicle, characterized by comprising the cooling device for the engineering vehicle according to any one of claims 1-8.