Electric pump and electric pump system

Abstract

The electric pump comprises a first rotor assembly and a second rotor assembly, the electric pump is provided with a first cavity and a second cavity, the first rotor assembly is located in the first cavity, the second rotor assembly is located in the second cavity, and the first rotor assembly is in transmission connection with the second rotor assembly. The first rotor assembly comprises a first rotor and a second rotor, the first rotor is located on the periphery of the second rotor, the electric pump is provided with a hydraulic cavity, the hydraulic cavity is located between the first rotor and the second rotor, the hydraulic cavity comprises a high-pressure cavity, the electric pump comprises a first channel and at least one outlet flow channel, and the first channel communicates with the second cavity; the first channel communicates with the high-pressure cavity, and the outlet runner communicates with the second cavity. The invention further discloses an electric pump system. The invention has the characteristic of prolonging the service life of the electric pump.

Description

[Technical field]

[0001] The present application relates to the field of vehicles, and in particular to components of a vehicle lubrication system and / or cooling system. [Background technology]

[0002] Electric pumps are used in vehicle lubrication systems and / or cooling systems and can meet market requirements. Electric pumps have a motor cavity. When the electric pump is working, the components in the motor cavity will generate heat. If the components are in a high ambient temperature, the life of the components will be affected, thereby reducing the service life of the electric pump. [Summary of the invention]

[0003] The purpose of the present application is to provide an electric pump, which is beneficial to improving the service life of the electric pump.

[0004] To achieve the above purpose, one embodiment of the present application adopts the following technical solution:

[0005] An electric pump, the electric pump comprising a first rotor assembly and a second rotor assembly, the first rotor assembly being drivingly connected to the second rotor assembly, the electric pump having a first cavity and a second cavity, the first rotor assembly being located in the first cavity, the second rotor assembly being located in the second cavity, the first rotor assembly comprising a first rotor and a second rotor, the first rotor being located at the outer periphery of the second rotor, the electric pump having a hydraulic cavity, the hydraulic cavity being located between the first rotor and the second rotor, the hydraulic cavity comprising a high-pressure cavity, the electric pump comprising a cavity wall, in the axial direction of the electric pump, the first cavity being located on one side of the cavity wall, the second cavity being located on the other side of the cavity wall, the electric pump comprising the first channel and at least one outlet flow channel, the first channel passing through the upper surface and the lower surface of the cavity wall, the first channel being connected to the high-pressure cavity, the first channel being connected to the second cavity, and the outlet flow channel being connected to the second cavity.

[0006] In the above technical solution, the first channel is connected to the high-pressure chamber, the first channel is connected to the second chamber, and the outlet flow channel is connected to the second chamber. When the electric pump is working, the working medium in the high-pressure chamber can flow into the second chamber through the first channel, and the working medium in the second chamber can flow out of the second chamber through the outlet flow channel. At least part of the heat generated by the components located in the second chamber can be taken away, which is beneficial to improve the service life of the components located in the second chamber, thereby helping to improve the service life of the electric pump.

[0007] An implementation method of the present application also discloses the following technical solution:

[0008] An electric pump system, the electric pump system comprises an electric pump and a fixing part, the fixing part is fixedly connected or limit-connected with the electric pump, the electric pump comprises a first rotor assembly and a second rotor assembly, the first rotor assembly is drivingly connected with the second rotor assembly, the electric pump has a first cavity and a second cavity, the first rotor assembly is located in the first cavity, the second rotor assembly is located in the second cavity, the first rotor assembly comprises a first rotor and a second rotor, the first rotor is located at the outer periphery of the second rotor, the electric pump has a hydraulic cavity, the hydraulic cavity is located between the first rotor and the second rotor, the hydraulic cavity comprises a high-pressure cavity, the electric pump comprises a cavity wall, in the axial direction of the electric pump, the first cavity is located on one side of the cavity wall, and the second cavity is located on the other side of the cavity wall, the electric pump comprises the first channel and at least one outlet flow channel, the first channel runs through the upper surface and the lower surface of the cavity wall, the first channel is connected to the high-pressure cavity, the first channel is connected to the second cavity, and the outlet flow channel is connected to the second cavity.

[0009] In the above technical solution, the first channel is connected to the high-pressure chamber, the first channel is connected to the second chamber, and the outlet flow channel is connected to the second chamber. When the electric pump is working, the working medium in the high-pressure chamber can flow into the second chamber through the first channel, and the working medium in the second chamber can flow out of the second chamber through the outlet flow channel. At least part of the heat generated by the components located in the second chamber can be taken away, which is beneficial to improve the service life of the components located in the second chamber, thereby helping to improve the service life of the electric pump.

Brief Description of the Drawings

[0010] Figure 1 is a schematic diagram of an electric pump according to an embodiment of the present application;

[0011] Figure 2 yes Figure 1 A schematic cross-sectional view of a first embodiment of the electric pump shown;

[0012] Figure 3 yes Figure 1 A schematic cross-sectional view of a second embodiment of the electric pump shown;

[0013] Figure 4 yes Figure 2 or Figure 3 A schematic diagram of a first shell;

[0014] Figure 5 yes Figure 2 or Figure 3 A schematic cross-sectional view of the first shell;

[0015] Figure 6 Yes Figure 2 or Figure 3 A front view structural schematic diagram of the first rotor assembly projected onto the first housing;

[0016] Figure 7 yes Figure 2 or Figure 3 A schematic structural diagram of a second shell from one perspective;

[0017] Figure 8 yes Figure 2 or Figure 3 A structural schematic diagram of the second shell from another perspective;

[0018] Fig. 9 yes Figure 1 A schematic cross-sectional view of a third embodiment of the electric pump shown;

[0019] Fig.10 yes Fig. 9 A schematic structural diagram of a second shell from one perspective;

[0020] Fig.11 yes Figure 1 A schematic cross-sectional view of a fourth embodiment of the electric pump shown;

[0021] Fig.12 yes Fig.11 A structural schematic diagram of the second shell from one perspective;

[0022] Fig.13 yes Fig.11 A structural schematic diagram of the second shell from another perspective;

[0023] Fig.14 yes Fig.11 A three-dimensional structural diagram of the middle pump shaft;

[0024] Fig.15 yes Fig. 9 or Fig.11 A schematic diagram of a first shell;

[0025] Fig.16 yes Fig. 9 or Fig.11 A schematic cross-sectional view of the first shell;

[0026] Fig.17 Will Fig. 9 or Fig.11 A front view structural schematic diagram of the first rotor assembly projected onto the first housing;

[0027] Fig.18 It is a structural schematic diagram of the electric pump system of the present application;

[0028] Fig.19 yes Fig.18 A cross-sectional schematic diagram of the electric pump system shown;

[0029] Fig. 20 yes Fig.18 Another cross-sectional schematic diagram of the electric pump system is shown.

[0030] Figure numerals: 1, first housing; 11, cavity wall; 112, groove portion; 112a, first portion; 112b, second portion; 112c, first groove wall; 112d, second groove wall; 12, first channel; 13, first groove; 121, first side wall; 122, second side wall; 123, first front end portion; 124, first rear end portion; 2, second housing; 21, inlet channel; 22, pump outlet channel; 23, branch channel; 231, first communication portion; 232, second communication portion; 24, second groove; 3, third housing; 4, first rotor assembly; 41, first rotor; 42, second rotor; 43, hydraulic chamber; 431, Low-pressure chamber; 432, high-pressure chamber; 5, stator assembly; 51, first end; 52, second end; 6, second rotor assembly; 7, pump shaft; 71, first end face; 72, second end face; 73, second channel; 8, electronic control assembly; 10, outlet channel; 10a, first outlet channel; 10b, second outlet channel; 101, first opening; 102, second opening; 20, first chamber; 30, second chamber; 100, electric pump; 200, fixing part; 200a, first accommodating chamber; 200b, second accommodating chamber; 300, first fluid channel; 400, second fluid channel; 500, first sealing part; 600, second sealing part. [Specific implementation method]

[0031] The present application is further described below with reference to the accompanying drawings and specific embodiments:

[0032] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. The directional words such as upper and lower involved in this article are defined by the positions of the parts shown in the drawings relative to each other, just for the clarity and convenience of expressing the technical solution. It should be understood that the directional words used in this article should not limit the scope of protection requested by this application.

[0033] Please refer to Figures 1 to 17The electric pump includes a pump housing, which includes a first housing 1, a second housing 2 and a third housing 3. The first housing 1 is fixedly connected to the second housing 2, for example, the first housing 1 and the second housing 2 are connected by screws or bolts. Of course, the first housing 1 and the second housing 2 can also be connected by other connection methods, such as plug-in, card connection, etc.; the first housing 1 is fixedly connected to the third housing 3, for example, the first housing 1 and the third housing 3 are connected by screws or bolts, which is conducive to making the disassembly and assembly of the electric pump more convenient; or the first housing 1 and the third housing 3 are limitedly connected.

[0034] The electric pump comprises a first rotor assembly 4, a stator assembly 5, a second rotor assembly 6, a pump shaft 7 and an electronic control assembly 8. The stator assembly 5 surrounds the second rotor assembly 6 from the radial outer side of the second rotor assembly 6, and the first rotor assembly 4 is in transmission connection with the second rotor assembly 6. The electric pump has a first cavity 20 and a second cavity 30. The first rotor assembly 4 (or at least part of the first rotor assembly 4) is located in the first cavity 20, at least part of the electronic control assembly 8, the second rotor assembly 6 (or at least part of the second rotor assembly 6), at least part of the pump shaft 7, and the stator assembly 5 (or at least part of the stator assembly 5) are located in the second cavity 30. The stator assembly 5 and the electronic control assembly 8 are located in the same cavity, which can reduce the size of the electric pump in the axial direction and make the structure compact, thereby reducing the production cost of the electric pump.

[0035] The first rotor assembly 4 includes a first rotor 41 and a second rotor 42. The first rotor 41 includes a plurality of internal teeth, and the second rotor 42 includes a plurality of external teeth. The first rotor 41 is located at the outer periphery of the second rotor 42. The first rotor 41 and the second rotor 42 are internally meshed. In other embodiments, the first rotor 41 and the second rotor 42 may also be externally meshed. In this case, the first rotor 41 and the second rotor 42 are arranged side by side. In this embodiment, the central axis of the first rotor 41 is offset from the central axis of the second rotor 42, that is, there is a certain eccentricity between the central axis of the first rotor 41 and the central axis of the second rotor 42. When the second rotor 42 rotates, at least part of the external teeth of the second rotor 42 mesh with at least part of the internal teeth of the first rotor 41, so that the second rotor 42 can drive the first rotor 41 to rotate. The electric pump includes a hydraulic chamber 43, and the hydraulic chamber 43 is located between the first rotor 41 and the second rotor 42. The stator assembly 5 includes a stator core (not shown) and a winding (not shown). When the electric pump is working, the electronic control assembly 8 controls the current in the winding of the stator assembly 5 to change according to a predetermined rule, thereby controlling the stator assembly 5 to generate a changing excitation magnetic field. The second rotor assembly 6 rotates under the action of the excitation magnetic field. The second rotor assembly 6 can directly or indirectly drive the first rotor assembly 4 to rotate. In this embodiment, the pump shaft 7 is transmission-connected to the first rotor assembly 4 and the second rotor assembly 6. Specifically, one side of the pump shaft 7 is connected to the second rotor 42, and the other side of the pump shaft 7 is connected to the second rotor assembly 6. The second rotor assembly 6 drives the second rotor 42 to rotate through the pump shaft 7, thereby realizing the rotation of the first rotor assembly 4.

[0036] The hydraulic chamber 43 includes a high pressure chamber 432. In order to more clearly distinguish the low pressure chamber 431 from the high pressure chamber 432, refer to Figure 6 or Fig.17 , the low pressure chamber 431 and the high pressure chamber 432 are distinguished by two different section lines. In this embodiment, please combine Figure 1 , the first rotor assembly 4 rotates in the counterclockwise direction, where "counterclockwise" means that the electric pump without sectioning is rotated. Figure 1 When placed in the state, it is viewed from a top view. The low-pressure chamber 431 includes a plurality of low-pressure sub-chambers, and the high-pressure chamber 432 includes a plurality of high-pressure sub-chambers. Along the rotation direction of the first rotor assembly 4, the volume of the low-pressure sub-chamber gradually increases to form a local vacuum, at which time the working medium is sucked into the low-pressure sub-chamber. In the high-pressure chamber 432, along the rotation direction of the first rotor assembly 4, the volume of the high-pressure sub-chamber gradually decreases, and the working medium is squeezed, so that the working medium entering the high-pressure sub-chamber is pressed out to generate flow power.

[0037] Please refer to Figures 1 to 17The electric pump includes a cavity wall 11. In the axial direction of the electric pump, the first cavity 20 is located on one side of the cavity wall 11, and the second cavity 30 is located on the other side of the cavity wall 11. The electric pump includes a first channel 12. The first channel 12 runs through the upper surface and the lower surface of the cavity wall 11. The first channel 12 is connected to the high-pressure cavity 432. The first channel 12 is connected to the second cavity 30. When the electric pump is working, the working medium can flow through the first cavity 20. At least part of the working medium of the first cavity 20 can flow into the second cavity 30 through the first channel 12. The working medium flowing into the second cavity 30 can exchange heat with the heat generated by the components (such as the stator assembly 5) located in the second cavity 30. The ambient temperature of the components is relatively low, which is beneficial to improving the service life of the components located in the second cavity 30, thereby facilitating improving the service life of the electric pump.

[0038] In one embodiment, please refer to Fig. 9 As shown in Figure 17, the cavity wall 11 has a groove portion 112. In the axial direction of the electric pump, the groove portion 112 faces the high-pressure cavity 432. The groove portion 112 is recessed from the upper surface of the cavity wall 11 to the lower surface of the cavity wall 11. The groove portion 112 does not penetrate the lower surface of the cavity wall 11. The first channel 12 has an opening at the bottom surface of the groove portion 112. Specifically, the first channel 12 penetrates the bottom surface of the groove portion 112 and the lower surface of the cavity wall 11. Since the groove portion 112 is located at a place where the pressure of the hydraulic cavity is relatively high, arranging the first channel 12 in the groove portion 112 is beneficial to increasing the pressure difference of the working medium entering the second cavity 30, thereby facilitating part of the working medium of the first cavity 20 to flow into the second cavity 30. The cross-section of the first channel 12 is a circular hole. In other embodiments, the cross-section of the first channel 12 may also be a square hole or other shapes.

[0039] The groove portion 112 includes a first portion 112a, a second portion 112b, a first groove wall 112c, and a second groove wall 112d. The first portion 112a is located at one end of the first groove wall 112c and one end of the second groove wall 112d. The second portion 112b is located at the other end of the first groove wall 112c and the other end of the second groove wall 112d. Along the radial direction of the first rotor assembly 4, the distance between the first groove wall 112c and the second groove wall 112d gradually decreases from the first portion 112a to the second portion 112b. The volume of the high-pressure sub-chamber gradually decreases, and the pressure of the working medium gradually increases. The first channel 12 is closer to the second part 112b relative to the first part 112a, which can relatively increase the pressure difference of the working medium entering the second chamber 30, so that the working medium can effectively flow into the second chamber 30. The working medium flowing into the second chamber 30 can exchange heat with the heat generated by the components located in the second chamber 30 (such as the stator assembly 5), which is beneficial to improving the service life of the components located in the second chamber 30, thereby helping to improve the service life of the electric pump.

[0040] In one embodiment, please refer to Figures 2 to 6 The first channel 12 includes a first side wall 121 and a second side wall 122. In the radial direction of the first rotor assembly 4, the first side wall 121 is closer to the central axis of the second rotor 42 than the second side wall 122. The first channel 12 includes a first front end portion 123 and a first rear end portion 124. The vertical distance between the first side wall 121 and the second side wall 122 gradually increases from the first front end portion 123 to the first rear end portion 124.

[0041] Please refer to Figures 2 to 17 The electric pump includes at least one outlet flow channel 10, which is connected to the second chamber 30. The working medium in the second chamber 30 can flow out of the second chamber 30 through the outlet flow channel 10, and at least part of the heat generated by the components located in the second chamber 30 can be taken away, which is beneficial to improving the service life of the components located in the second chamber 30, thereby facilitating improving the service life of the electric pump; in addition, the working medium flowing into the second chamber 30 flows out of the second chamber 30 from the outlet flow channel 10, the fluid path of the working medium is shorter, and the flow resistance of the working medium is lower; furthermore, the outlet flow channel 10 can be set at different positions of the electric pump according to the position of the lubricating component and / or the cooling component, thereby reducing the distance between the lubricating component and / or the cooling component and the electric pump, which is beneficial to reducing the flow resistance of the working medium. The pressure at the inlet of the first channel 12 is greater than the pressure at the outlet of the outlet channel 10, so that the working medium forms a pressure difference between the outlet of the outlet channel 10 and the inlet of the first channel 12. According to the principle that the working medium flows from a high pressure area to a low pressure area, the working medium in the high pressure chamber 432 can flow toward the outlet channel 10 (for example, Figure 2 , Figure 3 , Fig. 9 and Fig.11 S1 fluid path shown).

[0042] In one embodiment, please refer to Figure 2 and Fig. 9, at least part of the second rotor assembly 6 is located in the first housing 1, the second rotor assembly 6 is closer to the first rotor assembly 4 than the electronic control assembly 8, or at least part of the second rotor assembly 6 is closer to the first rotor assembly 4 than the electronic control assembly 8, the outlet flow channel 10 has a first opening 101 on the outer peripheral wall of the first housing 1, and the first opening 101 is located between the first rotor assembly 4 and the electronic control assembly 8 in the axial direction of the electric pump. In one embodiment, the stator assembly 5 has a first end 51, the first end 51 is closer to the first rotor assembly 4 relative to the electronic control assembly 8, and the first opening 101 is located between the first end 51 and the electronic control assembly 8 in the axial direction of the electric pump. At least part of the working medium in the second chamber 30 flows out of the electric pump from the outlet flow channel 10, and at least part of the working medium in the second chamber 30 can contact the stator assembly 5 located in the second chamber 30, which is conducive to heat dissipation of the stator assembly 5. In one embodiment, the first end 51 is close to the first rotor assembly 4 relative to the second end 52. In the axial direction of the electric pump, the first opening 101 is close to the first rotor assembly 4 relative to the first end 51. At least part of the working medium in the second chamber 30 flows out of the outlet flow channel 10 through a shorter path, with small flow resistance and less working medium loss, thereby accelerating the cooling / lubrication cycle.

[0043] Please refer to Fig.11 The electric pump includes at least two outlet flow channels 10, which are arranged along the circumferential direction of the first housing 1 to accelerate the flow of the working medium. In some embodiments, the electric pump includes an electronic control component 8, which is electrically connected to the stator component 5. The outlet flow channel 10 includes a first outlet flow channel 10a and a second outlet flow channel 10b. The first outlet flow channel 10a is closer to the electronic control component 8 than the second outlet flow channel 10b, and the second outlet flow channel 10b is farther away from the first rotor component 4 than the first end 51. At least part of the working medium in the second chamber 30 can contact the stator component 5 and the electronic control component 8 located in the second chamber 30, which is conducive to heat dissipation of the stator component 5 and the electronic control component 8.

[0044] In one embodiment, please refer to Figure 3 The outlet flow channel 10 has a second opening 102 on the end surface of the third housing 3. In the axial direction of the electric pump, the electronic control component 8 is located between the first rotor component 4 (or the second rotor component 6) and the second opening 102, and the stator component 5 is located between the first rotor component 4 and the second opening 102. At least part of the working medium in the second cavity 30 flows out of the electric pump from the outlet flow channel 10, and at least part of the working medium in the second cavity 30 can contact the stator component 5 and the electronic control component 8 located in the second cavity 30, which is beneficial to dissipate heat for the stator component 5 and the electronic control component 8 at the same time, thereby meeting the heat dissipation requirements of the high-power electric pump.

[0045] Please refer to Figure 3As shown in FIG17 , the electric pump includes an inlet flow channel 21 and an outlet flow channel 22. The inlet flow channel 21 is connected to the hydraulic chamber 43, specifically, the inlet flow channel 21 is connected to the low-pressure chamber 431; the outlet flow channel 22 is recessed from the lower end surface of the second housing 2, and along the axial direction of the second housing 2, the outlet flow channel 22 does not penetrate the upper end surface of the second housing 2, and the outlet flow channel 22 is connected to the hydraulic chamber 43, specifically, the outlet flow channel 22 is connected to the high-pressure chamber 432. Fig. 9 and Fig.11 In the fluid path S2 shown, the working medium can directly enter the low-pressure chamber 431 through the inlet channel 21, and the working medium can leave the high-pressure chamber 432 through the pump outlet channel 22; during the process of the first rotor assembly 4 rotating one circle, the volume of the hydraulic chamber between the inner teeth of at least one first rotor 41 and the outer teeth of the second rotor 42 corresponding to the inner teeth will change. Specifically, during the process of the first rotor assembly 4 rotating from the starting point to a certain angle, the volume of the hydraulic chamber 43 formed between the inner teeth of at least one first rotor 41 and the outer teeth of the second rotor 42 corresponding to the inner teeth will gradually increase to form a partial vacuum. At this time, the working medium is sucked into the low-pressure chamber 431 from the inlet channel 21. During the continuous rotation of the first rotor 41 and the second rotor 42, the volume of the hydraulic chamber 43 formed between the inner teeth of at least one first rotor 41 and the outer teeth of the second rotor 42 corresponding to the inner teeth will gradually decrease, and the working medium is squeezed, so that the working medium entering the hydraulic chamber 43 is pressed out to the pump outlet channel 22 to generate flow power.

[0046] Please refer to Figures 11 to 17 , Fig.11 It is a structural schematic diagram of another embodiment of the electric pump of the present application. The pump shaft 7 is fixedly connected to the first rotor assembly 4, and the pump shaft 7 is fixedly connected to the second rotor assembly 6. As long as the transmission connection between the first rotor assembly 4 and the second rotor assembly 6 can be achieved, it is included in the fixed connection method here. The pump shaft 7 includes a first end face 71 and a second end face 72. Along the axial direction of the pump shaft 7, the first end face 71 is close to the first rotor assembly 4 relative to the second end face 72. The electric pump has a second channel 73, and the second channel 73 runs through the first end face 71 and the second end face 72.

[0047] The second housing 2 includes a branch channel 23, which is recessed from the lower end surface of the second housing 2. Along the axial direction of the second housing 2, the branch channel 23 does not penetrate the upper end surface of the second housing 2. Fig.11In the fluid path shown in S3, the branch channel 23 is connected to the second channel 73, and the branch channel 23 is connected to the inlet channel 21, so that the working medium in the second chamber 30 can flow into the inlet channel 21 through the second channel 73 and the branch channel 23, and then be discharged from the pump outlet channel 22. This method of discharging the working medium in the second chamber 30 to the inlet channel 21 is conducive to improving the inlet flow rate of the pump, and thus is conducive to improving the pump efficiency. In addition, since the stator assembly 5 (or the stator assembly 5 and the electronic control assembly 8) is located in the second chamber 30, the flowing working medium can take away at least part of the heat of the stator assembly 5 (or the stator assembly 5 and the electronic control assembly 8), which is conducive to improving the heat dissipation efficiency of the stator assembly 5 (or the stator assembly 5 and the electronic control assembly 8), thereby meeting the heat dissipation requirements of high-power electric pumps. In this embodiment, the cross section of the second channel 73 is in the shape of a circular hole. In other embodiments, the cross section of the second channel 73 may also be in other shapes such as a square hole. The central axis of the second channel 73 coincides with the central axis of the pump shaft 7. The "coincidence" is a theoretical coincidence. There may be an overlap error in actual processing. All offsets within the processing error are within the protection scope of the present invention. The branch channel 23 includes a first connecting portion 231 and a second connecting portion 232. The first connecting portion 231 is directly connected to the second channel 73; along the radial direction of the second shell 2, the second connecting portion 232 is set as a partial peripheral side wall of the first connecting portion 231, so that the first connecting portion 231 is connected to the inlet channel 21; refer to Fig.12 and Fig.13 The flow cross-sectional area of ​​the second connecting portion 232 is smaller than the flow cross-sectional area of ​​the first connecting portion 231, or the diameter of the second connecting portion 232 is smaller than the diameter of the first connecting portion 231, which is beneficial to relatively reduce the flow velocity of the working medium in the branch channel 23 merging into the inlet channel 21.

[0048] Please refer to Figures 1 to 20 , Fig.18: is a schematic diagram of the structure of the electric pump system of the present application, the electric pump system includes an electric pump 100 and a fixed part 200, and the fixed part 200 is fixedly connected or limitedly connected to the electric pump 100. Specifically, the pump housing is provided with a first groove 13 and a second groove 24 in the circumferential direction, specifically, the first housing 1 has a first groove 13, and the second housing 2 has a second groove 24, the electric pump system includes a first sealing part 500 and a second sealing part 600, the first sealing part 500 is located in the first groove 13, the second sealing part 600 is located in the second groove 24, the fixed part 200 contacts the first sealing part 500, the fixed part 200 contacts the second sealing part 600, the first sealing part 500 is squeezed by the fixed part 200 and limited by the first groove 13, and the second sealing part 600 is squeezed by the fixed part 200 and limited by the second groove 24 to achieve sealing between the electric pump 100 and the fixed part 200. In the axial direction of the electric pump 100, the outlet flow channel 10 and the pump outlet flow channel 22 are located between the first sealing part 500 and the second sealing part 600, so that the pump outlet flow channel 22 can be located in the sealed chamber; or the outlet flow channel 10 and the pump outlet flow channel 22 are located in the sealed chamber, and the loss of working medium is small, which is conducive to ensuring the lubrication effect of the lubricating parts and / or the cooling effect of the cooling parts.

[0049] The fixing portion 200 has a receiving cavity, in which at least part of the electric pump 100 is located. The receiving cavity includes a first receiving cavity 200 a , in which part of the second shell 2 and at least part of the first shell 1 are located.

[0050] In one embodiment, the electric pump system includes a first fluid channel 300, the outlet channel 10 is connected to the first fluid channel 300, and the working medium flowing out of the outlet channel 10 can flow directly from the first fluid channel, and the loss of the working medium is small, which is conducive to ensuring the lubrication effect of the lubricating component and / or the cooling effect of the cooling component. Further, the electric pump includes a first fluid channel 300 and a second fluid channel 400, the first fluid channel 300 is connected to the outlet channel 10, the pump outlet channel 22 is connected to the first accommodating chamber 200a, and the first accommodating chamber 200a is connected to the second fluid channel 400, and the working medium can flow out from the first fluid channel 300 and the second fluid channel 400 respectively, so that the lubricating components located at different positions in the lubricating system and / or the cooling system can be lubricated and / or the cooling components can be cooled, or the outlet channel 10 and the first fluid channel 300 can be flexibly set according to the position of the lubricating component and / or the cooling component to meet the needs of different customers.

[0051] In one embodiment, please refer to Figures 19 to 20, the outlet flow channel 10 is connected to the first accommodating chamber 200a. Since the fluid channel of the fixed part 200 is connected to the first accommodating chamber 200a, the sealing requirement of the outlet flow channel 10 is relatively low, which is conducive to improving the installation efficiency of the fixed part and the electric pump. Specifically, the outlet flow channel 10 is connected to the first accommodating chamber 200a, and the pump outflow channel 22 is connected to the first accommodating chamber 200a. The electric pump includes a first fluid channel 300 and a second fluid channel 400. The first fluid channel 300 is connected to the first accommodating chamber 200a, and the second fluid channel 400 is connected to the first accommodating chamber 200a. At least part of the working medium flowing out of the pump outflow channel 22 flows into the second fluid channel 400, and at least part of the working medium flowing out of the outlet flow channel 10 flows into the first fluid channel 300, which can lubricate the lubricating components located at different positions and / or cool the cooling components. In other embodiments, the outlet flow channel 10 and the pump outlet flow channel 22 are both connected to the first accommodating chamber 200a, and the working medium flowing out of the outlet flow channel 10 and the working medium flowing out of the pump outlet flow channel 22 merge in the first accommodating chamber 200a, and then the lubrication components are lubricated and / or the cooling components are cooled through the fluid channel. Since the working medium only flows out from the fluid channel, the capacity loss of the working medium is low, and the lubrication components can be better lubricated and / or the cooling components can be cooled, thereby improving the lubrication effect of the lubrication components and / or the cooling effect of the cooling components.

[0052] The accommodating chamber includes a second accommodating chamber 200b. The first accommodating chamber 200a and the second accommodating chamber 200b are not connected. At least part of the second shell 2 is located in the second accommodating chamber 200b. The inlet channel 21 is connected to the second accommodating chamber 200b.

[0053] It should be noted that the above embodiments are only used to illustrate the present application and are not intended to limit the technical solutions described in the present application. Although the present application has been described in detail in this specification with reference to the above embodiments, a person of ordinary skill in the art should understand that a person of ordinary skill in the art can still modify or make equivalent substitutions to the present application, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present application should be included in the scope of the claims of the present application.

Claims

1. An electric pump, characterized in that: The electric pump comprises a first rotor assembly (4) and a second rotor assembly (6), wherein the first rotor assembly (4) is transmission-connected to the second rotor assembly (6), the electric pump comprises a first chamber (20) and a second chamber (30), the first rotor assembly (4) is located in the first chamber (20), the second rotor assembly (6) is located in the second chamber (30), the first rotor assembly (4) comprises a first rotor (41) and a second rotor (42), the first rotor (41) is located on the outer periphery of the second rotor (42), the electric pump comprises a hydraulic chamber (43), the hydraulic chamber (43) is located between the first rotor (41) and the second rotor assembly (6), The hydraulic chamber (43) comprises a high-pressure chamber (432), the electric pump comprises a chamber wall (11), in the axial direction of the electric pump, the first chamber (20) is located on one side of the chamber wall (11), and the second chamber (30) is located on the other side of the chamber wall (11), the electric pump comprises a first channel (12) and at least one outlet flow channel (10), the first channel (12) runs through the upper surface and the lower surface of the chamber wall (11), the first channel (12) is connected to the high-pressure chamber (432), the first channel (12) is connected to the second chamber (30), and the outlet flow channel (10) is connected to the second chamber (30).

2. The electric pump according to claim 1, characterized in that: The electric pump comprises a first housing (1) and an electronic control component (8), at least a portion of the second rotor component (6) is located in the first housing (1), the second rotor component (6) is closer to the first rotor component (4) than the electronic control component (8), the outlet flow channel (10) has a first opening (101) on the outer peripheral wall of the first housing (1), and in the axial direction of the electric pump, the first opening (101) is located between the first rotor component (4) and the electronic control component (8).

3. The electric pump according to claim 2, characterized in that: The electric pump comprises a stator assembly (5), wherein the stator assembly (5) is located on the outer periphery of the second rotor assembly (6), and the stator assembly (5) has a first end (51), wherein the first end (51) is close to the first rotor assembly (4) relative to the electric control assembly (8), and in the axial direction of the electric pump, the first opening (101) is located between the first end (51) and the electric control assembly (8).

4. The electric pump according to any one of claims 1 to 3, characterized in that: The electric pump comprises a first housing (1), a third housing (3) and an electric control component (8); the first housing (1) is fixedly connected or positionally connected to the third housing (3); at least part of the electric control component (8) is located in the first housing (1); the outlet flow channel (10) has a second opening (102) on the end surface of the third housing (3); in the axial direction of the electric pump, the second opening (102) is away from the second rotor component (6) relative to the electric control component (8).

5. The electric pump according to any one of claims 1 to 4, characterized in that: The cavity wall (11) has a groove portion (112). In the axial direction of the electric pump, the groove portion (112) faces the high-pressure cavity (432). The groove portion (112) is recessed from the upper surface of the cavity wall (11) to the lower surface of the cavity wall (11). The groove portion (112) includes a first portion (112a), a second portion (112b), a first groove wall (112c) and a second groove wall (112d). The first portion (112a) is located at one end of the first groove wall (112c) and the second groove wall (112d). The first groove wall (112c) is located at one end of the second groove wall (112d), the second portion (112b) is located at the other end of the first groove wall (112c) and the other end of the second groove wall (112d), along the radial direction of the first rotor assembly (4), the distance between the first groove wall (112c) and the second groove wall (112d) gradually decreases from the first portion (112a) to the second portion (112b), and the first channel (12) is closer to the second portion (112b) relative to the first portion (112a).

6. The electric pump according to any one of claims 1 to 4, characterized in that: The first channel (12) comprises a first side wall (121) and a second side wall (122); in a radial direction of the first rotor assembly (4), the first side wall (121) is closer to the central axis of the second rotor (42) than the second side wall (122); the first channel (12) comprises a first front end portion (123) and a first rear end portion (124); and a vertical distance between the first side wall (121) and the second side wall (122) gradually increases from the first front end portion (123) to the first rear end portion (124).

7. The electric pump according to any one of claims 1 to 3, characterized in that: The electric pump comprises a pump shaft (7) and an inlet channel (21), wherein the pump shaft (7) is fixedly connected to the first rotor assembly (4), and the pump shaft (7) is fixedly connected to the second rotor assembly (6). The electric pump comprises a second channel (73), wherein the second channel (73) passes through a first end surface (71) and a second end surface (72) of the pump shaft (7). The electric pump comprises an outlet channel (22) and a branch channel (23), wherein the outlet channel (22) is in communication with the high-pressure chamber (432), the branch channel (23) is in communication with the second channel (73), and the branch channel (23) is in communication with the inlet channel (21).

8. An electric pump system, characterized in that: The electric pump system comprises an electric pump (100) and a fixing part (200), wherein the fixing part (200) is fixedly connected or limit-connected to the electric pump (100), wherein the electric pump (100) comprises a first rotor assembly (4) and a second rotor assembly (6), wherein the first rotor assembly (4) is transmission-connected to the second rotor assembly (6), wherein the electric pump has a first cavity (20) and a second cavity (30), wherein the first rotor assembly (4) is located in the first cavity (20), and the second rotor assembly (6) is located in the second cavity (30), wherein the first rotor assembly (4) comprises a first rotor (41) and a second rotor (42), wherein the first rotor (41) is located on the outer periphery of the second rotor (42), and wherein the electric pump has a hydraulic cavity (43). The hydraulic chamber (43) is located between the first rotor (41) and the second rotor (42), the hydraulic chamber (43) includes a high-pressure chamber (432), the electric pump (100) includes a chamber wall (11), in the axial direction of the electric pump (100), the first chamber (20) is located on one side of the chamber wall (11), and the second chamber (30) is located on the other side of the chamber wall (11), the electric pump includes a first channel (12) and at least one outlet flow channel (10), the first channel (12) runs through the upper surface and the lower surface of the chamber wall (11), the first channel (12) is connected to the high-pressure chamber (432), the first channel (12) is connected to the second chamber (30), and the outlet flow channel (10) is connected to the second chamber (30).

9. The electric pump system according to claim 8, characterized in that: The electric pump system comprises a first fluid channel (300), and the outlet channel (10) is connected to the first fluid channel (300); or the fixed portion (200) has a accommodating cavity, at least part of the electric pump (100) is located in the accommodating cavity, and the accommodating cavity comprises a first accommodating cavity (200a), and the outlet channel (10) is connected to the first accommodating cavity (200a).

10. The electric pump system according to claim 9, characterized in that The electric pump comprises a pump outflow channel (22), the pump outflow channel (22) is connected to the high-pressure chamber (432), the pump outflow channel (22) is connected to the first accommodating chamber (200a), and the electric pump system comprises a second fluid channel (400), the second fluid channel (400) is connected to the first accommodating chamber (200a).

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