High-pressure-resistant oil-immersed motor pump

Abstract

The utility model discloses a high pressure resistant oil immersion type motor pump which comprises a motor stator, a motor rotor, a motor shaft, a motor shell, a motor end plate, an aviation plug and an oil pump, the motor end plate is fixedly arranged at one end of the motor shell in a sealed mode, and the oil pump is fixedly arranged at the other end of the motor shell in a sealed mode. One end of the motor shaft is rotationally arranged in the oil pump and used for driving the oil pump to work, the other end of the motor shaft is rotationally arranged in the motor end plate, a motor rotor is coaxially and fixedly arranged on the motor shaft, and a motor stator matched with the motor rotor is fixedly arranged in the motor shell. And the aviation patch plug is hermetically and fixedly arranged on the motor end plate and is electrically connected with the motor stator. One end of the motor shaft is arranged in the oil pump, the other end of the motor shaft is arranged in the motor shell, the motor shell and the oil pump are connected in a sealed mode, oil leakage is avoided, meanwhile, oil enters the motor shell, the lubricating function can be achieved, and parts in the motor shell can be cooled.

Description

Technical Field

[0001] The utility model relates to the field of motor pumps, in particular to a high-pressure resistant oil-immersed motor pump. Background Art

[0002] In the prior art, the pump is connected to the output shaft of the motor. In order to prevent the pump from leaking oil, the pump needs an oil seal. When the pump needs high-pressure output, the output shaft rotates at a very high speed, and the pump cannot be completely sealed, and oil leakage still occurs. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a high-pressure resistant oil-immersed motor pump.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A high-pressure resistant oil-immersed motor pump includes a motor stator, a motor rotor, a motor shaft, a motor housing, a motor end plate, an aviation connector and an oil pump. The motor end plate is sealed and fixed on one end of the motor housing, and the oil pump is sealed and fixed on the other end of the motor housing. One end of the motor shaft is rotatably disposed in the oil pump and is used to drive the oil pump to work. The other end of the motor shaft is rotatably disposed in the motor end plate. The motor rotor is coaxially fixed on the motor shaft. The motor stator that cooperates with the motor rotor is fixed in the motor housing. The aviation connector is sealed and fixed on the motor end plate and is electrically connected to the motor stator.

[0006] Furthermore, the oil pump includes a pump body, a pump cover, an oil inlet sensor, an oil outlet sensor and a gear component. The pump body is sealed and fixedly connected to the motor housing, the pump cover is sealed and fixedly arranged on the pump body, the gear component is arranged in the pump body and fixedly connected to the end of the motor shaft, and an oil inlet channel and an oil outlet channel are provided on the pump cover. The oil inlet channel cooperates with the input side of the gear component, and the oil outlet channel cooperates with the output side of the gear component. The oil inlet sensor and the oil outlet sensor are both sealedly arranged on the pump body and electrically connected to the aviation connector. The oil inlet sensor cooperates with the oil inlet channel, and the oil outlet sensor cooperates with the oil outlet channel.

[0007] Furthermore, a bearing sleeve is sealed and fixedly provided on the motor end plate, and the inner wall of the bearing sleeve is connected to the outer wall of the motor shaft via a deep groove ball bearing.

[0008] Furthermore, a stator water barrier is fixedly provided on the inner wall of the motor stator, the inner wall of the stator water barrier cooperates with the outer wall of the motor rotor, one end of the stator water barrier is sealed and fixedly connected to the pump body, the other end of the stator water barrier is sealed and fixedly connected to the bearing sleeve, and the aviation connector is arranged between the inner wall of the motor housing and the outer wall of the stator water barrier.

[0009] Furthermore, a first sealing ring is provided between the pump body and the motor housing, a second sealing ring is provided between the stator water isolation sleeve and the pump body, and a third sealing ring is provided between the stator water isolation sleeve and the bearing sleeve.

[0010] Furthermore, the pump body is provided with a rotation hole that cooperates with the motor shaft, and a sliding bearing is provided between the rotation hole and the motor shaft.

[0011] Furthermore, a control housing is sealed on the motor housing, the motor end plate is arranged in the control housing, a controller is fixedly arranged in the control housing, a plug connector electrically connected to the controller is provided on the control housing, and the controller is electrically connected to the aviation connector.

[0012] Furthermore, a penetrating cable hole is provided on the motor end plate, and the PIN pin on the aviation connector is fixed in the cable hole by glass sintering sealing.

[0013] Furthermore, the stator water isolation sleeve is a PPS water isolation sleeve, and the wall thickness of the stator water isolation sleeve is 0.4-0.8 mm.

[0014] Furthermore, it is characterized in that: the oil inlet sensor and the oil outlet sensor are both temperature and pressure sensors.

[0015] The beneficial effects of the utility model are:

[0016] 1) In this technology, one end of the motor shaft is arranged in the oil pump, and the other end is arranged in the motor housing. The motor housing and the oil pump are sealed and connected, which will not cause oil leakage. At the same time, the oil entering the motor housing can not only achieve the effect of lubrication, but also cool the components in the motor housing.

[0017] 2) In this technology, the controller is set in the control housing, and the control housing is sealed on the motor housing to prevent dust from entering the control housing and causing damage to the controller.

[0018] 3) In this technology, the motor housing is directly connected to the pump body, making the motor pump connection more compact and achieving miniaturization.

[0019] 4) In this technology, a double sealing design is achieved through the stator watertight sleeve and aviation connector to ensure that the pumped medium will not enter the control housing and cause damage to the controller, resulting in controller failure.

[0020] 5) In this technology, an oil inlet sensor and an oil outlet sensor are provided to collect the temperature and pressure of the pumped medium, and an internal pressure closed loop and temperature compensation of the algorithm can also be performed to improve the customer's usage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the three-dimensional structure diagram of the motor pump;

[0022] Figure 2 This is the cross-sectional structure of the motor pump Figure 1 ;

[0023] Figure 3 This is the cross-sectional structure of the motor pump Figure 2 ;

[0024] Figure 4 This is the connection structure diagram of the oil inlet sensor and the oil outlet sensor on the pump body;

[0025] Figure 5 This is the connection structure diagram of the aviation connector on the motor end plate;

[0026] In the figure, 1-motor stator, 2-motor rotor, 3-motor shaft, 4-motor housing, 5-motor end plate, 6-pump body, 7-pump cover, 8-gear component, 9-first sealing ring, 10-sliding bearing, 11-bearing sleeve, 12-deep groove ball bearing, 13-control housing, 14-controller, 15-plug connector, 16-aviation connector, 17-oil inlet channel, 18-oil outlet channel, 19-oil inlet sensor, 20-oil outlet sensor, 21-stator watertight sleeve, 22-second sealing ring, 23-third sealing ring. DETAILED DESCRIPTION

[0027] The following will be combined with the embodiments to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present invention.

[0028] See Figure 1-Figure 5 , the utility model provides a technical solution:

[0029] A high-pressure, oil-immersed motor pump comprises a motor stator 1, a motor rotor 2, a motor shaft 3, a motor housing 4, a motor end plate 5, an aviation connector 16, and an oil pump. The motor end plate 5 is hermetically fixed to one end of the motor housing 4, and the oil pump is hermetically fixed to the other end of the motor housing 4. One end of the motor shaft 3 is rotatably mounted within the oil pump and is used to drive the oil pump. The other end of the motor shaft 3 is rotatably mounted within the motor end plate 5. The motor rotor 2 is coaxially fixed to the motor shaft 3. The motor stator 1 is fixedly mounted within the motor housing 4 to mate with the motor rotor 2. The aviation connector 16 is hermetically fixed to the motor end plate 5 and electrically connected to the motor stator 1. The motor end plate 5 is provided with a cable hole extending therethrough, and a pin on the aviation connector 16 is fixed to the cable hole via a glass sinter seal. The motor housing 4 and the motor end plate 5 are integrally and hermetically connected. The motor stator 1 and the motor rotor 2 are both conventional. The motor rotor 2 rotates within the motor stator 1, driving the motor shaft 3 when the motor rotor 2 rotates, which in turn drives the oil pump. The motor stator 1, motor rotor 2, motor shaft 3 and motor housing 4 are all coaxially arranged. The pump body 6 and motor shaft 3 are gap-fitted and not sealed. The liquid in the oil pump can enter the motor housing 4 through the gap between the pump body 6 and the motor shaft 3. Four aviation connectors 16 are sealed on the motor end plate 5, three of which are connected to the UVW three-phase lines of the motor stator 1 respectively, and the last one is connected to the oil inlet sensor 19 and the oil outlet sensor 20 through a wire. The wire passes between the outer wall of the motor stator 1 and the inner wall of the motor housing 4. The wires of the oil inlet sensor 19 and the oil outlet sensor 20 are welded to the pins on the aviation connector 16. The brushless motor in this technology consists of a motor stator 1, motor rotor 2, motor shaft 3, motor housing 4, and motor end plate 5. Because the brushless motor requires the three-phase UVW line to be connected to the controller 14, an aviation connector 16 is directly sealed at the cable hole. The brushless motor's UVW three-phase line is welded to one end of the aviation connector's pin, and the other end of the pin is then welded to the controller 14. The pins and base of the aviation connector 16 are sealed to the motor end plate 5 via glass sintering, which can withstand high pressures exceeding 5 MPa. The motor stator 1 is stamped and riveted from silicon steel sheets with a thickness of 0.35 to 0.5 mm.

[0030] In some embodiments, the oil pump includes a pump body 6, a pump cover 7, an oil inlet sensor 19, an oil outlet sensor 20, and a gear component 8. The pump body 6 is sealed and fixedly connected to the motor housing 4. The pump cover 7 is sealed and fixedly set on the pump body 6. The gear component 8 is set in the pump body 6 and fixedly connected to the end of the motor shaft 3. The pump cover 7 is provided with an oil inlet channel 17 and an oil outlet channel 18. The oil inlet channel 17 cooperates with the input side of the gear component 8, and the oil outlet channel 18 cooperates with the output side of the gear component 8. The oil inlet sensor 19 and the oil outlet sensor 20 are both sealed and set on the pump body 6 and electrically connected to the aviation connector 16. The oil inlet sensor 19 cooperates with the oil inlet channel 17, and the oil outlet sensor 20 cooperates with the oil outlet channel 18. The oil inlet sensor 19 and the oil outlet sensor 20 are both temperature and pressure sensors in the prior art. Among them, the pump body 6 is used in conjunction with the pump cover 7 and is used to install the gear component 8 in the prior art. The function of the gear component 8 is to pressurize the oil. The gear component 8 is driven by the motor shaft 3. The oil enters from the oil inlet channel 17, is pressurized through the gear component 8, and is then discharged from the oil outlet channel 18 at high pressure. The pump body 6 and the motor shaft 3 are clearance-fitted, and part of the oil enters the motor housing 4 through the gap for lubrication and cooling.

[0031] In some embodiments, a bearing sleeve 11 is sealed and fixedly provided on the motor end plate 5, and the inner wall of the bearing sleeve 11 is connected to the outer wall of the motor shaft 3 via a deep groove ball bearing 12. A rotating hole that cooperates with the motor shaft 3 is provided on the pump body 6, and a sliding bearing 10 is provided between the rotating hole and the motor shaft 3. The purpose of providing the sliding bearing 10 is to allow the motor shaft 3 to have a certain amount of expansion and contraction space during thermal expansion and contraction to prevent damage. The deep groove ball bearing 12 reduces the friction force received by the motor shaft 3 during rotation. The bearing sleeve 11 is used to install the deep groove ball bearing 12. The bottom of the bearing sleeve 11 is sealed between the motor end plate 5, and the interior of the bearing sleeve 11 is also sealed to prevent leakage.

[0032] In some embodiments, a stator water barrier 21 is fixedly mounted on the inner wall of the motor stator 1. The inner wall of the stator water barrier 21 mates with the outer wall of the motor rotor 2. One end of the stator water barrier 21 is sealed and fixedly connected to the pump body 6, and the other end of the stator water barrier 21 is sealed and fixedly connected to the bearing sleeve 11. The aviation connector 16 is disposed between the inner wall of the motor housing 4 and the outer wall of the stator water barrier 21. The stator water barrier 21 is a PPS water barrier with a wall thickness of 0.4 to 0.8 mm. A first sealing ring 9 is disposed between the pump body 6 and the motor housing 4, a second sealing ring 22 is disposed between the stator water barrier 21 and the pump body 6, and a third sealing ring 23 is disposed between the stator water barrier 21 and the bearing sleeve 11. Among them, although the pumping medium is non-conductive, it is inevitable that some conductive metal impurities will be present in the medium after it circulates for a long time. If these impurities enter the motor housing 4 and the control housing 13, the welding points of the aviation connector 16 are likely to cause a short circuit. Therefore, the pumping medium cannot enter the motor housing 4 and the control housing 13. By setting the stator watertight sleeve 21, the second sealing ring 22 and the third sealing ring 23 to separate them, impurities are prevented from entering the motor housing 4, and the aviation connector 16 and the motor end plate 5 are sealed. In this way, it can be ensured that the high-pressure (above 2Mpa) pumping medium inside the brushless motor will not flow into the control housing 13 and will not cause a short circuit. The wall thickness of the stator watertight sleeve 21 is usually selected to be 0.4mm, 0.5mm, 0.6mm and 0.8mm.

[0033] In some embodiments, a brushless motor requires a position sensor to identify the position of the motor rotor for commutation. If a wired Hall effect sensor or rotary encoder is used, an aviation connector 16 must be added to seal the wires of the Hall effect or rotary encoder, which increases costs. Therefore, a position detection chip is directly mounted on the inner wall of the carrier sleeve 11, and a magnetic encoder is mounted on the motor shaft 3. The position of the motor rotor 2 is detected by the combination of the magnetic encoder and the position detection chip. The position detection chip only needs to sense changes in the magnetic field of the magnetic steel to determine the position of the motor rotor 2.

[0034] In some embodiments, a control housing 13 is sealed on the motor housing 4, and the motor end plate 5 is disposed within the control housing 13. A controller 14 is fixedly disposed within the control housing 13. A plug connector 15 electrically connected to the controller 14 is disposed on the control housing 13, and the controller 14 is electrically connected to an aviation connector 16. Both the controller 14 and the plug connector 15 are conventional. The controller 14 controls the rotation of the motor rotor 2 within the motor stator 1. The motor stator 1 has a coil that is controlled by the controller 14. The plug connector 15 connects to an energized power source. The control housing 13 protects the controller 14 from damage caused by external water or dust. Four aviation connectors 16 are electrically connected to the controller 14. Data collected by the oil inlet sensor 19 and the oil outlet sensor 20 are transmitted to the controller 14, which then controls the motor stator 1.

[0035] This motor pump can directly operate on an 800V high-voltage vehicle platform. The plug connector 15 includes a low-voltage connector and a high-voltage connector. The high-voltage connector directly supplies 800V high-voltage electricity to the motor for driving the motor. Since the control signal is generally low-voltage, the low-voltage connector supplies 12V low-voltage electricity to the motor controller. The advantage of high-voltage and low-voltage power supply is that the internal circuit design of the motor controller is not required, saving costs. The oil inlet sensor 19 and the oil outlet sensor 20 can collect the medium pressure and temperature of the oil inlet channel 17 and the oil outlet channel 18. The collected pressure can not only be uploaded to the vehicle controller via the CAN bus, but can also be used in the internal pressure closed-loop algorithm, and the collected temperature can be used to perform temperature compensation on the algorithm.

[0036] In the description of the present invention, it should be understood that the terms "upper", "lower", "bottom", "one end", "top", "middle", "the other end", "coaxial", "one side", "inside", "front", "center", "two ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In the present invention, unless otherwise clearly stipulated and limited, the terms "setting", "installation", "connection", "fixation", "hinge" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0038] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the concept described herein through the above teachings or techniques or knowledge in the relevant fields. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the claims appended hereto.

Claims

1. A high-pressure resistant oil-immersed motor pump, characterized by: The invention comprises a motor stator (1), a motor rotor (2), a motor shaft (3), a motor housing (4), a motor end plate (5), an aviation connector (16) and an oil pump. The motor end plate (5) is sealed and fixedly arranged on one end of the motor housing (4), the oil pump is sealed and fixedly arranged on the other end of the motor housing (4), one end of the motor shaft (3) is rotatably arranged in the oil pump and is used to drive the oil pump to work, the other end of the motor shaft (3) is rotatably arranged in the motor end plate (5), the motor rotor (2) is coaxially fixedly arranged on the motor shaft (3), the motor stator (1) matched with the motor rotor (2) is fixedly arranged in the motor housing (4), and the aviation connector (16) is sealed and fixedly arranged on the motor end plate (5) and is electrically connected to the motor stator (1).

2. The high-pressure oil-immersed motor pump according to claim 1, characterized in that: The oil pump comprises a pump body (6), a pump cover (7), an oil inlet sensor (19), an oil outlet sensor (20) and a gear component (8). The pump body (6) is sealed and fixedly connected to the motor housing (4). The pump cover (7) is sealed and fixedly arranged on the pump body (6). The gear component (8) is arranged in the pump body (6) and fixedly connected to the end of the motor shaft (3). An oil inlet channel (17) and an oil outlet channel (18) are arranged on the pump cover (7). The oil inlet channel (17) cooperates with the input side of the gear component (8), and the oil outlet channel (18) cooperates with the output side of the gear component (8). The oil inlet sensor (19) and the oil outlet sensor (20) are both sealed and arranged on the pump body (6) and electrically connected to the aviation connector (16). The oil inlet sensor (19) cooperates with the oil inlet channel (17), and the oil outlet sensor (20) cooperates with the oil outlet channel (18).

3. The high-pressure oil-immersed motor pump according to claim 2, characterized in that: A bearing sleeve (11) is sealed and fixedly provided on the motor end plate (5), and the inner wall of the bearing sleeve (11) is connected to the outer wall of the motor shaft (3) via a deep groove ball bearing (12).

4. The high-pressure oil-immersed motor pump according to claim 3, characterized in that: A stator water barrier (21) is fixedly provided on the inner wall of the motor stator (1), the inner wall of the stator water barrier (21) cooperates with the outer wall of the motor rotor (2), one end of the stator water barrier (21) is sealed and fixedly connected to the pump body (6), the other end of the stator water barrier (21) is sealed and fixedly connected to the bearing sleeve (11), and the aviation connector (16) is arranged between the inner wall of the motor housing (4) and the outer wall of the stator water barrier (21).

5. The high-pressure oil-immersed motor pump according to claim 4, characterized in that: A first sealing ring (9) is provided between the pump body (6) and the motor housing (4), a second sealing ring (22) is provided between the stator watertight sleeve (21) and the pump body (6), and a third sealing ring (23) is provided between the stator watertight sleeve (21) and the bearing sleeve (11).

6. A high-pressure resistant oil-immersed motor pump according to any one of claims 2 to 5, characterized in that: The pump body (6) is provided with a rotation hole that matches the motor shaft (3), and a sliding bearing (10) is provided between the rotation hole and the motor shaft (3).

7. A high-pressure resistant oil-immersed motor pump according to any one of claims 1 to 5, characterized in that: A control housing (13) is sealed on the motor housing (4), the motor end plate (5) is arranged in the control housing (13), a controller (14) is fixedly arranged in the control housing (13), a plug connector (15) electrically connected to the controller (14) is arranged on the control housing (13), and the controller (14) is electrically connected to the aviation connector (16).

8. A high-pressure resistant oil-immersed motor pump according to any one of claims 1 to 5, characterized in that: The motor end plate (5) is provided with a penetrating cable hole, and the PIN pin on the aviation connector (16) is fixed in the cable hole through glass sintering sealing.

9. A high-pressure resistant oil-immersed motor pump according to claim 4 or 5, characterized in that: The stator water isolation sleeve (21) is a PPS water isolation sleeve, and the wall thickness of the stator water isolation sleeve (21) is 0.4-0.8 mm.

10. The high-pressure oil-immersed motor pump according to claim 4 or 5, characterized in that: The oil inlet sensor (19) and the oil outlet sensor (20) are both temperature and pressure sensors.

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