Stator assembly, stator assembly potting process and oil-cooling bidirectional regulation motor pump

Abstract

The invention discloses a stator assembly, which adopts a potting process and comprises a stator core, a second winding, an inner steel sleeve and an outer steel sleeve, the stator core comprises a stator tooth part and a stator yoke part, the stator tooth part and the stator yoke part are separated, and the stator yoke part sleeves the outer surface of the stator tooth part; the stator tooth part comprises a plurality of stator iron core tooth parts, each stator iron core tooth part is sleeved with an iron core coil, the stator iron core tooth parts and the iron core coils are embedded, each iron core coil comprises an iron core coil holder, and a first winding is wound on each iron core coil holder; the second winding is arranged in the stator iron core; and the inner steel sleeve and the outer steel sleeve are both arranged in the second winding and are at least used for blocking glue during glue pouring. The stator tooth part and the stator yoke part are assembled in a separated and independent mode, sub-parts can be manufactured at the same time according to labor, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to a stator assembly, a stator assembly potting process and an oil-cooled bidirectional regulation motor pump, belonging to the technical field of motor pumps. Background Art

[0002] With the rapid development and continuous popularization of the vehicle industry, motor pumps are widely used in vehicle lubrication systems and cooling systems. Motor pumps mainly provide power sources for vehicle lubrication systems, cooling systems, steering systems, suspension adjustment systems, etc.

[0003] Existing motor pumps have a long production cycle, low production efficiency, high cost and poor high-pressure resistance. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a stator assembly, a stator assembly potting process and an oil-cooled bidirectional regulation motor pump with high production efficiency, short production cycle, low cost, good sealing performance and high-pressure resistance.

[0005] To achieve the foregoing invention purpose, the technical solutions adopted by the present invention include:

[0006] On the one hand, the present invention discloses a stator assembly. The stator assembly adopts a potting process. The stator assembly includes a stator core, a second winding, an inner steel sleeve and an outer steel sleeve; the stator core includes a stator tooth part and a stator yoke part. The stator tooth part and the stator yoke part are separated, and the stator yoke part is sleeved on the outer surface of the stator tooth part; the stator tooth part includes a plurality of stator core tooth parts, and a core wire package is sleeved on each stator core tooth part. The stator core tooth part is inlaid with the core wire package. The core wire package includes a core wire frame, and a first winding is wound on the core wire frame; the second winding is arranged inside the stator core; both the inner steel sleeve and the outer steel sleeve are arranged inside the second winding, and the inner steel sleeve and the outer steel sleeve are at least used to block glue during potting.

[0007] On the other hand, the present invention discloses a stator assembly potting process, which is used for potting the stator assembly. The potting process includes the following steps:

[0008] S1. Prepare the stator assembly and the mold;

[0009] S2. Preheat the stator assembly;

[0010] S3. Pretreat the potting glue;

[0011] S4. Vacuum pot the stator assembly;

[0012] S5. Cure and demold the stator assembly;

[0013] Furthermore, in S2, the temperature for preheating the stator assembly is 60 - 70 °C, and the preheating time is 40 - 50 minutes.

[0014] Furthermore, in S5, the temperature for curing and demolding the stator assembly is 75 °C, and the curing and demolding time is 90 minutes.

[0015] The present invention also discloses a high - voltage - resistant oil - cooled bidirectional - regulation motor pump, which includes a stator assembly. There are two sets of the stator assemblies, and it also includes a stator housing, a rotor assembly, a pump shaft, a pump valve body, and an oil - separating sleeve. Both sets of the stator assemblies are arranged inside the stator housing. There are two sets of the rotor assemblies, which are corresponding to the stator assemblies in position, and the rotor assemblies are arranged inside the stator assemblies. There are two pump shafts, which are corresponding to the rotor assemblies in position, and the pump shafts are arranged inside the rotor assemblies. There are two pump valve bodies, which are respectively arranged at both ends of the stator housing. The oil - separating sleeve is arranged between the pump valve body and the stator assembly, and the oil - separating sleeve, the rotor assembly, the pump valve body, and the stator housing enclose a working medium cavity.

[0016] Furthermore, the oil - separating sleeve and the tooth part of the stator core are integrally formed by injection molding with rubber.

[0017] Furthermore, the rotor assembly includes a rotor core and rotor magnets. The rotor core has an interference fit with the pump shaft, and the rotor magnets are arranged inside the rotor core.

[0018] Furthermore, the rotor core with the pump shaft and the rotor magnets with the embedded rotor core are processed by injection molding with rubber through a mold.

[0019] Furthermore, a first sealing ring is arranged between the inner ring of the oil - separating sleeve and the pump valve body. The first sealing ring is at least used to block the working medium oil to prevent the working medium oil from leaking out.

[0020] Furthermore, a second sealing ring is arranged between the inner steel sleeve and the pump valve body. The second sealing ring is at least used to block the working medium oil to prevent the working medium oil from leaking out.

[0021] Furthermore, a third sealing ring is arranged between the oil - separating sleeve and the stator housing. The third sealing ring is at least used to block the working medium oil to prevent the working medium oil from leaking out externally.

[0022] Furthermore, a magnetic encoder plate assembly and magnets are arranged on the pump shaft. The magnetic encoder plate assembly and the magnets are at least used to detect the rotation speed of the pump shaft.

[0023] Furthermore, a first oil inlet and a second oil inlet are arranged on the pump shaft, and the working medium oil flows back to the working medium cavity through the first oil inlet and the second oil inlet.

[0024] Furthermore, a sliding bearing is provided in the hydraulic cavity of the pump valve body. The sliding bearing is connected to the pump shaft and is at least used to axially limit the pump shaft in the axial direction of the pump shaft to prevent the pump shaft from axially moving up and down.

[0025] Furthermore, a controller is provided on the stator housing.

[0026] Compared with the prior art, the advantages of the present invention include:

[0027] 1) A stator assembly provided by the present invention adopts a stator potting process. By improving insulation, mechanical strength, heat dissipation, moisture and dust protection, vibration reduction, noise reduction, and chemical protection, it ensures the reliable operation of the motor in various environments;

[0028] 2) A stator assembly provided by the present invention has a separated stator tooth part and stator yoke part. The assembly of independent parts allows each sub-part to be manufactured simultaneously with division of labor, improving production efficiency and reducing production costs;

[0029] 3) A high-pressure resistant oil-cooled bidirectional regulation motor pump provided by the invention adopts a stator potting process, and the stator tooth part and stator yoke part are separated. By improving insulation, mechanical strength, heat dissipation, moisture and dust protection, vibration reduction, noise reduction, and chemical protection, it ensures the reliable operation of the motor in various environments; the assembly of independent parts allows each sub-part to be manufactured simultaneously with division of labor, improving production efficiency and reducing production costs; and an oil-cooled immersed rotor is adopted, which improves the heat dissipation efficiency of the motor pump. Experimental results show that the rotor oil-cooling system can significantly reduce the operating temperature of the motor. Compared with traditional cooling methods, the temperature reduction range is between 20 - 30%; the power density of the oil-cooled immersed rotor is increased. Due to more effective heat dissipation, the motor can operate at a higher power density, which means that in the same volume, the rotor oil-cooled motor can provide higher output power and thus can respond quickly; the reliability is improved. Effective heat dissipation can reduce the thermal stress of the motor, extend the motor life, and reduce failures such as fatigue damage caused by overheating; the design of the injection-molded encapsulated rotor has good surface finish and light weight, can rotate in the oil with low resistance, and can achieve the effect of cooling the rotor without reducing the output power. It has good impact resistance, perfect mechanical properties, no cracks, can improve the overall rigidity of the rotor, is high-temperature resistant and low-noise;

[0030] 4) A high-pressure resistant oil-cooled bidirectional regulation motor pump provided by the present invention integrates a dual-motor and dual-pump head, with a high degree of integration. While ensuring material utilization rate and low production costs, it is lightweight and compact, and realizes the feasibility of bidirectional regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 is a schematic diagram of the overall structure of a high-pressure-resistant oil-cooled bidirectional regulating motor pump provided in a typical embodiment of the present invention;

[0033] Figure 2 is a schematic diagram of the structure of a stator core provided in a typical embodiment of the present invention;

[0034] Explanation of reference numerals: 1, pump valve body; 2, stator housing; 3, stator assembly; 4, rotor assembly; 5, controller; 6, stator core; 7, second winding; 8, rotor magnet; 9, rotor core; 10, pump shaft; 13, third sealing ring; 17, first sealing ring; 19, second sealing ring; 15, outer steel sleeve; 16, oil separation sleeve; 18, inner steel sleeve; 20, working medium oil cavity; 22, magnet; 23, magnetic encoder plate assembly; 24, core wire frame; 25, stator core tooth part; 26, stator yoke part; 28, first winding; 30, first oil inlet; 31, second oil inlet; 32, sliding bearing. Detailed implementation manners

[0035] In view of the deficiencies in the prior art, the inventors of this case have proposed the technical solution of the present invention through long-term research and a large number of practices. The following will further explain the technical solution, its implementation process, principle, etc.

[0036] On the one hand, the present invention discloses a stator assembly. The stator assembly 3 adopts a potting process. The stator assembly 3 includes a stator core 6, a second winding 7, an inner steel sleeve 18, and an outer steel sleeve 15; as Figure 2 shown, the stator core 6 includes a stator tooth part and a stator yoke part 26. The stator tooth part and the stator yoke part 26 are separated. The stator yoke part 26 is sleeved on the outer surface of the stator tooth part. The stator tooth part includes several stator core 6 tooth parts. A core wire package is sleeved on each stator core 6 tooth part. The stator core 6 tooth part is inlaid with the core wire package. The core wire package includes a core wire frame 24. A first winding 28 is wound on the core wire frame 24. The first winding 28 is enameled wire. In this embodiment, the first winding 28 is round enameled wire, and the round enameled wire is wound on the core wire frame 24 to form a core wire package.

[0037] During the assembly process, several iron core wire coils are sequentially inserted into the 6-tooth part of the stator core, and then the stator tooth part with the complete iron core wire coil is sleeved onto the 6-yoke part of the stator core, thus completing the winding assembly of the stator core 6.

[0038] The second winding 7 is arranged inside the stator core 6; both the inner steel sleeve 18 and the outer steel sleeve 15 are arranged inside the second winding 7, and the inner steel sleeve 18 and the outer steel sleeve 15 are at least used to block the glue during potting. The inner steel sleeve 18 and the outer steel sleeve 15 cooperate with the potting tooling to ensure that the stator area to be potted is evacuated and the potting glue does not enter the inner rotor area of the oil separation sleeve 16.

[0039] The stator assembly 3 in this application adopts a potting process to ensure the reliable operation of the motor in various environments by improving insulation, mechanical strength, heat dissipation, moisture and dust protection, vibration and noise reduction, and chemical protection. It can strengthen the integrity of the motor pump and improve the resistance to external impacts and vibrations; it can improve the tightness of the stator assembly 3 of the motor pump and the insulation between circuits, and improve the high-voltage resistance; it can improve the heat dissipation ability of the electric pump stator assembly 3 to the housing and achieve high responsiveness; it eliminates the stator dipping and coating processes, and improves the production cost and efficiency of the electro-hydraulic pump.

[0040] In this application, the stator tooth part and the stator yoke part 26 are of a split type and are assembled from independent parts. Each sub-part can be manufactured simultaneously with a division of labor, which improves production efficiency and reduces production costs; at the same time, it can reduce the magnetic flux leakage of the tooth part by optimizing the magnetic circuit, thereby reducing the exciting current and copper loss; in addition, the tooth-yoke separation design can effectively reduce the additional core loss generated on the surface of the iron core due to magnetic conductance harmonics, further improving the efficiency of the motor; it can enhance the stability and reliability of the stator structure. Compared with the traditional riveting method, the self-bonding iron core has higher stability, can reduce the occurrence of eddy currents, reduce vibrations during high-speed rotation, and thus improve the efficiency of the motor and reduce the noise and vibration level.

[0041] On the other hand, the present invention discloses a stator assembly potting process, which is used to pot the stator assembly 3. The potting process includes the following steps:

[0042] S1. Prepare the stator assembly 3 and the mold;

[0043] S2. Preheat the stator assembly 3. Specifically, the preheating temperature of the stator assembly 3 is 60 - 70 °C. The preheating temperature of the stator assembly 3 can be 60 °C, 65 °C or 70 °C. In this embodiment, the preheating temperature of the stator assembly 3 is 70 °C; the preheating time is 40 - 50 minutes. The preheating time can be 40 minutes, 45 minutes or 50 minutes. In this embodiment, the preheating time is 45 minutes;

[0044] S3. Pretreat the potting glue;

[0045] S4. Vacuum potting the stator assembly 3;

[0046] S5. Curing and demolding the stator assembly 3. The temperature for curing and demolding the stator assembly 3 is 75 °C, and the time for curing and demolding is 90 minutes.

[0047] As Figure 1 shown, the present invention also discloses a high-voltage-resistant oil-cooled bidirectional regulation motor pump, which includes a stator assembly 3. There are two sets of the stator assemblies 3, and it further includes a stator housing 2, a rotor assembly 4, a pump shaft 10, a pump valve body 1, and an oil separation sleeve 16. Both sets of the stator assemblies 3 are arranged inside the stator housing 2. There are two sets of the rotor assemblies 4, and the rotor assemblies 4 correspond to the stator assemblies 3 in position, and the rotor assemblies 4 are arranged inside the stator assemblies 3. There are two pump shafts 10, and the pump shafts 10 correspond to the rotor assemblies 4 in position, and the pump shafts 10 are arranged inside the rotor assemblies 4. There are two pump valve bodies 1, and the two pump valve bodies 1 are respectively arranged at both ends of the stator housing 2. The oil separation sleeve 16 is arranged between the pump valve body 1 and the stator assembly 3. The oil separation sleeve 16, the rotor assembly 4, the pump valve body 1, and the stator housing 2 enclose a working medium chamber, and the rotor assembly 4 is immersed in the working medium chamber by oil cooling, which improves the sealing performance of the motor pump, improves the heat dissipation efficiency of the motor pump, and improves the high-voltage resistance performance of the motor pump.

[0048] This application adopts a stator potting process to process the stator and a rotor oil-cooled immersion design, which can shorten the production cycle of the stator, improve the production efficiency of the stator, reduce the production cost, improve the heat dissipation efficiency of the motor pump, improve the response efficiency of the motor pump, increase the power density, extend the service life of the motor pump, and improve the high-voltage resistance performance of the motor pump.

[0049] This application adopts an oil-cooled immersed rotor, which improves the heat dissipation efficiency of the motor pump. The experimental results show that the rotor oil-cooling system can significantly reduce the operating temperature of the motor. Compared with the traditional cooling method, the temperature reduction range is between 20 - 30%; the power density of the oil-cooled immersed rotor increases. Due to more effective heat dissipation, the motor can operate at a higher power density, which means that in the same volume, the rotor oil-cooled motor can provide a higher output power, thus enabling a quick response; the reliability is improved. Effective heat dissipation can reduce the thermal stress of the motor, extend the service life of the motor, and reduce failures such as fatigue damage caused by overheating. The design of the injection-molded encapsulated rotor has good surface finish and light weight, and can rotate in the oil with low resistance. While achieving the effect of cooling the rotor, the output power is not reduced. It has good impact resistance, perfect mechanical properties, no cracks, can improve the overall rigidity of the rotor, is high-temperature resistant and low-noise.

[0050] The present invention integrates a dual-motor and dual-pump head, with a high degree of integration. While ensuring material utilization rate and low production costs, it is made light and compact, realizing the feasibility of two-way adjustment.

[0051] In some embodiments, the oil separation sleeve 16 and the tooth part of the stator core 6 are integrally injection molded with rubber, which can increase the strength of the oil separation sleeve 16 and shorten the production cycle of the stator assembly 3.

[0052] Specifically, the rotor assembly 4 includes a rotor core 9 and rotor magnets 8. The rotor core 9 is in interference fit with the pump shaft 10, and the rotor magnets 8 are arranged inside the rotor core 9.

[0053] In some embodiments, the rotor core 9 with the pump shaft 10 and the rotor magnets 8 embedded with the rotor core 9 are processed by injection molding and rubber coating with a mold, and the rotor core 9 after the injection molding and rubber coating treatment is balanced by embedding steel balls for rotor dynamic balance.

[0054] In some embodiments, a first sealing ring 17 is arranged between the inner ring of the oil separation sleeve 16 and the pump valve body 1. The first sealing ring 17 is used to block the working medium oil to prevent the working medium oil from leaking out.

[0055] On this basis, a second sealing ring 19 is arranged between the inner steel sleeve 18 and the pump valve body 1. The second sealing ring 19 is used to block the working medium oil, playing a dual-sealing guarantee role to prevent the working medium oil from leaking out.

[0056] On this basis, a third sealing ring 13 is arranged between the oil separation sleeve 16 and the stator housing 2. The third sealing ring 13 is used to block the working medium oil to prevent the working medium oil from leaking out externally, and at the same time assist in completing stator potting.

[0057] In some embodiments, a magnetic encoder plate assembly 23 and magnets 22 are arranged on the pump shaft 10. The magnetic encoder plate assembly 23 and the magnets 22 are at least used to detect the rotation speed of the pump shaft 10. The magnets 22 can be planar two-pole magnets 22, multi-pole magnetized magnets 22 or axially magnetized magnets 22. Different magnets 22 are selected according to different encoders. In this embodiment, the magnets 22 are selected as planar two-pole magnets 22.

[0058] In some embodiments, a first oil inlet 30 and a second oil inlet 31 are arranged on the pump shaft 10, and the working medium oil flows back to the working medium chamber through the first oil inlet 30 and the second oil inlet 31.

[0059] On the basis above, since the hydraulic cavity of the pump body 1 may cause axial movement of the pump shaft 10, in order to prevent the axial movement of the pump shaft 10, a sliding bearing 32 is arranged in the hydraulic cavity of the pump body 1. The sliding bearing 32 is connected to the pump shaft 10. The sliding bearing 32 and the shaft shoulder of the pump shaft 10 are used to axially limit the pump shaft 10 and prevent the pump shaft 10 from axially moving.

[0060] On the basis above, a controller 5 is arranged on the stator housing 2. When the motor pump is working, the controller 5 can input a current that changes according to a predetermined law to the stator winding, so that the stator assembly 3 will generate a changing excitation magnetic field, making the rotor assembly 4 start to rotate under the action of the excitation magnetic field. The pentagonal flat position on the pump shaft 10 drives the internal components of the pump body 1 to work. The motor rotor speed is obtained through the magnetic encoder plate assembly 23 and the planar two-pole permanent magnet 22. This causes the volume of the hydraulic cavity in the pump body 1 to change, or it can be described that the pressure in the hydraulic cavity changes, causing the working medium to be discharged from the working medium oil cavity 20 composed of the rotor assembly 4 and the oil separation sleeve 16, and can flow back to the medium cavity from the two oil inlets of the pump shaft 10.

[0061] It should be understood that the above embodiments are only used to illustrate the technical concept and features of the present invention, and its purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A stator assembly, characterized in that: The stator assembly (3) adopts a potting process, and the stator assembly (3) includes: A stator core (6), the stator core (6) includes a stator tooth part and a stator yoke part (26), the stator tooth part and the stator yoke part (26) are separated, and the stator yoke part (26) is sleeved on the outer surface of the stator tooth part; the stator tooth part includes a plurality of stator core tooth parts (25), and a core wire coil is sleeved on each stator core tooth part (25), the stator core tooth part (25) is inlaid with the core wire coil, the core wire coil includes a core wire frame (24), and a first winding (28) is wound on the core wire frame (24); A second winding (7), the second winding (7) is arranged inside the stator core (6); An inner steel sleeve (18) and an outer steel sleeve (15), the inner steel sleeve (18) and the outer steel sleeve (15) are both arranged inside the second winding (7), and the inner steel sleeve (18) and the outer steel sleeve (15) are at least used to block the glue during potting.

2. A stator assembly potting process, characterized in that: For potting the stator assembly (3) described in claim 1, The potting process includes the following steps: S1. Prepare the stator assembly and the mold; S2. Preheat the stator assembly (3); S3. Pretreat the potting glue; S4. Vacuum pot the stator assembly; S5. Cure and demold the stator assembly; And / or, in S2, the temperature for preheating the stator assembly is 60 - 70 °C, and the preheating time is 40 - 50 minutes; And / or, in S5, the temperature for curing and demolding the stator assembly is 75 °C, and the curing and demolding time is 90 minutes.

3. An oil-cooled bidirectional adjustable motor pump with high voltage resistance, characterized in that: Includes the stator assembly (3) described in claim 1, there are two sets of the stator assembly (3), and further includes A stator housing, both sets of the stator assembly (3) are arranged inside the stator housing; A rotor assembly (4), there are two sets of the rotor assembly (4), the rotor assembly (4) corresponds to the stator assembly (3) in position, and the rotor assembly (4) is arranged inside the stator assembly (3), A pump shaft (10), there are two pump shafts (10), the pump shafts (10) correspond to the rotor assembly (4) in position, and the pump shafts (10) are arranged inside the rotor assembly (4); A pump valve body (1), there are two pump valve bodies (1), and the two pump valve bodies (1) are respectively arranged at both ends of the stator housing; An oil separation sleeve (16), the oil separation sleeve (16) is arranged between the pump valve body (1) and the stator assembly (3), and the oil separation sleeve (16), the rotor assembly (4), the pump valve body (1) and the stator housing enclose a working medium cavity.

4. The oil-cooled bidirectional regulation motor pump with high voltage resistance according to claim 3, wherein: The oil separation sleeve (16) and the stator core tooth part (25) are integrally injection molded with glue.

5. A high-pressure-resistant oil-cooled bidirectional regulation motor pump according to claim 3, characterized in that: The rotor assembly (4) includes a rotor core (9) and a rotor magnet (8), the rotor core (9) is in interference fit with the pump shaft (10), and the rotor magnet (8) is arranged inside the rotor core (9).

6. The oil-cooled bidirectional adjustable motor pump with high voltage resistance according to claim 5, characterized in that: The rotor core (9) equipped with the pump shaft (10) and the rotor magnet (8) embedded with the rotor core (9) are processed by injection molding and potting with glue through a mold.

7. A high-pressure resistant oil-cooled bidirectional regulation motor pump according to claim 3, characterized in that: A first sealing ring (17) is provided between the inner ring of the oil separation sleeve (16) and the pump valve body (1), and the first sealing ring (17) is at least used to block the working medium oil to prevent the working medium oil from leaking out; And / or, a second sealing ring (19) is provided between the inner steel sleeve (18) and the pump valve body (1), and the second sealing ring (19) is at least used to block the working medium oil to prevent the working medium oil from leaking out; And / or, a third sealing ring (13) is provided between the oil separation sleeve (16) and the stator housing, and the third sealing ring (13) is at least used to block the working medium oil to prevent the working medium oil from leaking outwards.

8. The oil-cooled bidirectional regulation motor pump with high pressure resistance according to claim 3, characterized in that: A magnetic encoder plate assembly (23) and a magnet (22) are provided on the pump shaft (10), and the magnetic encoder plate assembly (23) and the magnet (22) are at least used to detect the rotation speed of the pump shaft (10).

9. The oil-cooled bidirectional adjustable motor pump with high pressure resistance according to claim 3, characterized in that: A first oil inlet (30) and a second oil inlet (31) are provided on the pump shaft (10), and the working medium oil flows back to the working medium cavity through the first oil inlet (30) and the second oil inlet (31).

10. The oil-cooled bidirectional adjustable motor pump with high voltage resistance according to claim 3, characterized in that: A sliding bearing (32) is provided in the hydraulic cavity of the pump valve body (1), the sliding bearing (32) is connected to the pump shaft (10), and the sliding bearing (32) is at least used to axially limit the pump shaft (10) to prevent the pump shaft (10) from axially moving upwards; And / or, a controller (5) is provided on the stator housing.

Images