CN206023532U - A kind of electro-hydraulic pump - Google Patents

Abstract

An electro-hydraulic pump relates to an electro-hydraulic pump. The utility model achieves the further integration of the motor and the pump. The casing of the utility model supports the entire electro-hydraulic pump through bearings; the junction box is installed on the surface of the casing, the stator core and the stator pole are integrated; the stator winding is axially wound on the stator pole; the rotor core Installed on the rotating shaft; bearings are installed at both ends of the rotating shaft; in addition, side holes are opened at the positions corresponding to the bearings at both ends of the casing, one side is the oil inlet and the other side is the oil outlet; the remaining cavity in the casing is oil route. The utility model combines the driving motor and the liquid pump into one, and the rotor is optimized as a vane, so that the structure of the electro-hydraulic pump is simple, the volume is smaller, and the weight is lighter. The connection device is omitted, the noise and vibration will be smaller, and the operation will be more stable and safe.

Description

an electro-hydraulic pump

technical field

The utility model relates to an electro-hydraulic pump, which is a highly integrated body of a motor and a pump, and belongs to the field of motor technology and hydraulic technology.

Background technique

There are three main hydraulic power sources, traditional motor-pump set, shielded motor pump and electro-hydraulic pump. The former two adopt the method of connecting the motor and the liquid pump by the coupling, which will bring many disadvantages: the noise and vibration caused by the non-concentric coupling; the axial arrangement makes its volume and mass larger ;Multiple connections and fits reduce reliability and risk leakage. Therefore, the electro-hydraulic pump, as a highly integrated motor pump, is the main development direction of the hydraulic power source.

Switched reluctance motors have been widely used in various fields of people's production and life because of their advantages of stepless speed regulation, wide and wide speed regulation range, simple structure, and no need for permanent magnets and windings on the rotor. The stator and rotor of the switched reluctance motor are made of laminated silicon steel sheets. The stator poles are wound with phase-divided concentrated windings. The number of stator and rotor poles of the switched reluctance motor is different. There are three-phase 12/8 pole structure, four-phase 8/6 pole structure, three-phase 6/2 pole structure, three-phase 6/4 pole structure and three-phase 6/8 pole structure and so on. The operation of the switched reluctance motor follows the principle of minimum reluctance.

At present, asynchronous motors are widely used in electrohydraulic pumps. Compared with the asynchronous machine, the switched reluctance motor has windings on its rotor, which increases the difficulty of our transformation. At present, there are two main types of electro-hydraulic pumps: swash plate type and centrifugal type. Although the axial length has been reduced, the parts belonging to the motor and the liquid pump can still be clearly distinguished in the casing, and a high degree of integration has not been achieved.

To sum up, the current electro-hydraulic pump still has a lot of room for optimization. The operation principle of the switched reluctance motor is simple, and the structure of the rotor is simple, which provide the prerequisites for the utility model.

Utility model content

A brief overview of the present invention is given below in order to provide a basic understanding of certain aspects of the present invention. It should be understood that this summary is not an exhaustive summary of the invention. It is not intended to identify the key or important part of the present invention, nor is it intended to limit the scope of the present invention. Its purpose is merely to present some concepts in a simplified form as a prelude to the more detailed description that is discussed later.

In view of this, according to one aspect of the utility model, the utility model aims to propose an electro-hydraulic pump to further integrate the motor and the pump, abandon the traditional motor-pump axial arrangement structure, and based on the switched reluctance motor and shaft The operating principle of the flow fan creatively combines the liquid pump and the motor into one, so that the electric energy can be directly converted into hydraulic energy output. .

An electro-hydraulic pump proposed by the utility model includes a motor casing, a junction box, a stator core, a stator pole, a stator winding, a rotor core, a bearing and a rotating shaft;

The casing supports the entire electro-hydraulic pump through bearings; the junction box is installed on the surface of the casing, the stator core and the stator pole are integrated; the stator winding is axially wound on the stator pole; the rotor core is mounted on the shaft; Bearings are installed at the end; in addition, there are side holes at the positions corresponding to the bearings at both ends of the casing, one side is the oil inlet, and the other side is the oil outlet; the remaining cavity in the casing is the oil delivery path.

Further: the interior of the junction box is connected to the stator winding to supply power to the stator winding.

Further: the stator core is a stator core of a switched reluctance motor.

Further: the stator winding is in the form of loosely embedded stator windings, or is a cable; the stator winding is covered with insulation. Such setting can not only effectively prevent the generation of electric sparks, but also prevent the liquid from corroding the windings.

Further: the rotor core is in the shape of an axial flow fan, and the number of fan blades is the number of rotor poles. Different types of switched reluctance motors have different numbers of stator and rotor poles. The number of stator poles and the number of rotor blades of the electro-hydraulic pump follow the number of stator and rotor poles of the switched reluctance motor. Therefore, the stators and rotors of electro-hydraulic pumps with different numbers of stator and rotor poles will not be the same, but their shell structures are the same.

Further: the rotating shaft is connected with the rotor core, the rotating shaft is a rotating shaft of magnetically permeable material, and the rotor core is also a rotor core of magnetically permeable material. The bearings connected at both ends play a role of fixing and supporting. With this setting, the operation of the switched reluctance motor follows the principle of minimum reluctance. When the rotating shaft is made of magnetically conductive material, the magnetic lines of force are closed and the motor rotates.

Further: in the electro-hydraulic pump, all the cavity parts in the casing are liquid transmission channels; such setting can save axial and radial space, improve space utilization, and help it to be applied to various complex occasions. At the same time, the transmitted liquid can also be used as a heat dissipation medium, which greatly reduces the temperature rise of the electro-hydraulic pump, and saves heat-dissipating components such as fans and cooling fins, making the electro-hydraulic pump more economical in size.

The effect achieved by the utility model is:

A novel electro-hydraulic pump of the utility model is a highly integrated body of a motor and a pump. The utility model abandons the traditional motor-pump axially arranged structure, and creatively combines the liquid pump and the motor into one based on the operating principle of the switched reluctance motor and the axial flow fan, so that the electric energy can be directly converted into hydraulic energy output . The basic idea is to directly drive the rotor, which is made in the shape of an axial fan, through the stator windings of the switched reluctance motor. The utility model helps to improve the utilization efficiency of the motor, and reduces vibration and loss. The high degree of fusion greatly shortens the axial length of the electro-hydraulic pump, which helps it to be used in more demanding occasions. In addition, the driving motor and the hydraulic pump are combined into one, and the rotor is optimized as a vane, which makes the electro-hydraulic pump simple in structure, smaller in size and lighter in weight. The connection device is omitted, the noise and vibration will be smaller, and the operation will be more stable and safe.

Description of drawings

Fig. 1 is an axial sectional view of the overall structure of the electro-hydraulic pump described in the utility model;

Fig. 2 is a schematic diagram of the axial three-phase 12/8 pole stator and rotor at A of the electro-hydraulic pump described in the utility model;

Fig. 3 is a three-dimensional structure diagram of the three-phase 6/8 pole stator and rotor at A of the electro-hydraulic pump described in the utility model;

Fig. 4 is a three-dimensional structural diagram of the three-phase 6/4 pole stator and rotor at A of the electro-hydraulic pump described in the utility model;

In the figure, 1-motor casing, 2-junction box, 3-stator core, 4-stator pole, 5-stator winding, 6-rotor core, 7-bearing, 8-rotating shaft, 9-oil inlet, 10- Oil outlet.

detailed description

Exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings. In the interest of clarity and conciseness, not all features of an actual implementation are described in this specification. It should be understood, however, that in developing any such practical embodiment, many implementation-specific decisions must be made in order to achieve the developer's specific goals, such as meeting those constraints related to the system and business, and those Restrictions may vary from implementation to implementation. Furthermore, it should be understood that, while potentially complex and time-consuming, such development would nevertheless be a routine undertaking for those skilled in the art having the benefit of this disclosure.

Here, it should also be noted that, in order to avoid obscuring the utility model due to unnecessary details, only the device structure and/or processing steps closely related to the solution according to the utility model are shown in the drawings, Other details that have little relationship with the utility model are omitted.

An electro-hydraulic pump according to this embodiment, as can be seen from FIG. 1 , includes a motor casing 1, a junction box 2, a stator core 3, a stator pole 4, a stator winding 5, a rotor core 6, a bearing 7 and a rotating shaft 8;

The casing 1 supports the entire electro-hydraulic pump through the bearing 7; the junction box 2 is installed on the surface of the casing 1, the stator core 3 and the stator pole 4 are integrated; the stator winding 5 is axially wound on the stator pole 4; the rotor core 6 Installed on the rotating shaft 8; bearings 7 are installed at both ends of the rotating shaft 8; in addition, there are side holes at the two ends of the casing 1 corresponding to the positions of the bearings 7, one side is an oil inlet 9, and the other side is an oil outlet 10; The rest of the cavity in the casing 1 is an oil delivery path; the interior of the junction box 2 is connected to the stator winding 5 to supply power for the stator winding 5; the exterior of the junction box 2 is connected to the diode control circuit.

The working process of the electro-hydraulic pump in this embodiment is as follows: According to the operation of the switched reluctance motor, the principle of minimum reluctance is followed. When the junction box is energized, a certain phase winding is energized. The main axis of the fan blade coincides, so the torque is generated, and the fan blade is pulled to make the main axis coincide with the magnetic field axis; the diode control circuit outside the junction box energizes the windings of each phase in turn, and a continuous torque is generated, and the rotor blade rotates accordingly Get up; as shown in Figure 2, the fan blade is designed as an axial flow type, so it has the ability to transmit while rotating.

The above-mentioned embodiment illustrates in detail the new 12/8-pole electro-hydraulic pump with reference to the accompanying drawing 2 . Switched reluctance motors have different numbers of stator and rotor poles, and the blades of axial flow fans also have different shapes. Figures 2-4 combine different numbers of stator and rotor poles and different blade shapes to give several typical structure, but does not limit the specific number of poles and fan shape.

Although the embodiments disclosed in the present utility model are as above, the content thereof is only for the convenience of understanding the technical solutions of the present utility model, and is not intended to limit the present utility model. Anyone skilled in the technical field to which the utility model belongs can make any modifications and changes in the form and details of the implementation without departing from the core technical solution disclosed in the utility model, but the protection limited by the utility model The scope must still be subject to the scope defined by the appended claims.

Claims (5)

1. An electro-hydraulic pump, comprising a motor casing (1), a junction box (2), a stator core (3), a stator pole (4), a stator winding (5), a rotor core (6), and a bearing (7) and shaft (8); It is characterized in that: the casing (1) supports the entire electro-hydraulic pump through bearings (7); the junction box (2) is installed on the surface of the casing (1), and the stator core (3) and the stator pole (4) are integrated ; The stator winding (5) is axially wound on the stator pole (4); the rotor core (6) is installed on the rotating shaft (8); bearings (7) are installed at both ends of the rotating shaft (8); in addition, the casing (1) There are side holes at the positions corresponding to the bearings (7) at both ends, one side is the oil inlet (9), and the other side is the oil outlet (10); the rest of the cavity in the casing (1) is the oil delivery path, The inside of the junction box (2) is connected with the stator winding (5) and supplies power to the stator winding (5). 2. An electro-hydraulic pump according to claim 1, characterized in that: the stator core (3) is a stator core of a switched reluctance motor. 3. An electro-hydraulic pump according to claim 1 or 2, characterized in that: the stator winding (5) is in the form of a loosely embedded stator winding, or is a cable; the stator winding (5) Outer cover has insulation skin. 4. An electro-hydraulic pump according to claim 3, characterized in that: the rotor core (6) is in the shape of an axial flow fan, and the number of fan blades is the number of rotor poles. 5. An electro-hydraulic pump according to claim 4, characterized in that: the rotating shaft (8) is connected with the rotor core, the rotating shaft (8) is a rotating shaft made of magnetically conductive material, and the rotor core is also magnetically conductive Material Rotor core.