Electric pump

Abstract

The electric pump comprises a second containing part, a second rotor assembly, a stator assembly and a rotating shaft, the second containing part is provided with a second containing cavity, the second rotor assembly and the stator assembly are located in the second containing cavity, and a part of the second rotor assembly is fixed to or connected with the rotating shaft. The electric pump comprises an inlet channel and an outlet channel, the rotating shaft is provided with a first channel, the first channel comprises a first inlet and at least one first outlet, the pressure intensity of the first inlet is larger than that of the first outlet, and the first outlet is communicated with the second containing cavity; in the flow path direction, the first channel is located downstream of the inlet channel, and the stator assembly is at least partially located between the outlet channel and the first outlet. Therefore, fluid can flow into the second accommodating cavity through the first channel and is in contact with the stator assembly, so that heat exchange is carried out, and the temperature of the stator assembly is reduced.

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 Art

[0002] In the related art, an electric pump provides a power source for the vehicle's lubrication system and cooling system. The electric pump includes a stator assembly. During operation, the stator assembly will generate heat and the temperature increase will affect its working performance and service life. Therefore, the stator assembly needs to be cooled during operation. Summary of the invention

[0003] In order to solve the above technical problems, the following technical solutions are provided:

[0004] An electric pump comprises a first accommodating portion, a second accommodating portion, a first rotor assembly, a second rotor assembly, a stator assembly and a rotating shaft, wherein the first accommodating portion has a first accommodating cavity, the second accommodating portion has a second accommodating cavity, the first rotor assembly is located in the first accommodating cavity, a portion of the first rotor assembly is fixed or connected to the rotating shaft, the second rotor assembly and the stator assembly are located in the second accommodating cavity, a portion of the second rotor assembly is fixed or connected to the rotating shaft,

[0005] The electric pump comprises an inlet channel and an outlet channel,

[0006] The rotating shaft has a first channel, the first channel includes a first inlet and at least one first outlet, along the flow path direction, the first channel is located downstream of the inlet channel, and the first outlet is communicated with the second accommodating chamber;

[0007] The pressure at the first inlet is greater than the pressure at the first outlet;

[0008] Along the flow path direction, the stator assembly is at least partially located between the outlet channel and the first outlet.

[0009] Since the first channel is connected to the inlet channel, the pressure at the first inlet is greater than the pressure at the first outlet, and the first outlet is connected to the second accommodating chamber, the fluid entering from the inlet channel can flow into the second accommodating chamber, and the stator assembly is located in the second accommodating chamber, and along the flow direction, the stator assembly is at least partially located between the outlet channel and the first outlet, so that when the fluid flows through the second accommodating chamber, it can contact the stator assembly, thereby performing heat exchange to reduce the temperature of the stator assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A three-dimensional schematic diagram of an embodiment of the present application;

[0011] Figure 2 for Figure 1 The corresponding top view diagram in FIG.

[0012] Figure 3 for Figure 2 A schematic cross-sectional view along line AA;

[0013] Figure 4 for Figure 3 A magnified schematic diagram of the middle area D;

[0014] Figure 5 for Figure 1 A three-dimensional schematic diagram of the first cover body;

[0015] Figure 6 for Figure 1 A three-dimensional schematic diagram of the middle shell;

[0016] Figure 7 for Figure 1 A schematic diagram of the first side wall, the second side wall, the third side wall, the fourth side wall, the second rotor and the projection of the second rotor;

[0017] Figure 8 A three-dimensional schematic diagram of another embodiment of the present application;

[0018] Fig. 9 for Figure 8 The corresponding top view diagram;

[0019] Fig.10 for Fig. 9 The cross-sectional view along line BB in the middle;

[0020] Fig.11 for Figure 8 A three-dimensional schematic diagram of the first cover body;

[0021] Fig.12 for Figure 8 A schematic top view of the middle shell;

[0022] Fig.13 for Figure 8 Schematic cross-sectional view along line CC.

[0023] Reference numerals:

[0024] 100, housing; 200, stator assembly; 300, rotating shaft; 400, inlet channel; 500, outlet channel; 600, first cover body; 700, second cover body;

[0025] 301, first channel; 3011, first inlet; 3012, first outlet; 302, first end; 601, first connecting channel; 6011, fifth side wall; 6012, sixth side wall; 602, first groove; 501, third side wall; 502, fourth side wall; 604, third connecting channel; 6041, seventh side wall; 6042, eighth side wall; 605, second groove; 701, first flange; 7011, limiter; 7012, diverter;

[0026] 1. First rotor assembly; 2. Second rotor assembly; 3. First accommodating portion; 4. Second accommodating portion;

[0027] 11. First rotor; 12. Second rotor; 111. External teeth; 121. Internal teeth; 13. Volume chamber; 14. Suction area; 15. Discharge area; 31. First accommodating chamber; 310. First area; 32. Second connecting channel; 321. First side wall; 322. Second side wall; 33. Accommodating channel; 41. Second accommodating chamber. DETAILED DESCRIPTION

[0028] The technical solution of the specific implementation mode is described below with reference to the accompanying drawings.

[0029] like Figure 1-7 As shown,

[0030] An electric pump includes a first accommodating portion 3, a second accommodating portion 4, a first rotor assembly 1, a second rotor assembly 2, a stator assembly 200 and a rotating shaft 300, wherein the first accommodating portion 3 has a first accommodating chamber 31, the second accommodating portion 4 has a second accommodating chamber 41, the first rotor assembly 1 is located in the first accommodating chamber 31, a portion of the first rotor assembly 1 is fixed to or connected to the rotating shaft 300, the second rotor assembly 2 and the stator assembly 200 are located in the second accommodating chamber 41, a portion of the second rotor assembly 2 is fixed to or connected to the rotating shaft 300, the stator assembly 200 corresponds to the second rotor assembly 2, and the stator assembly 200 generates a rotating magnetic field to drive the second rotor assembly 2 to rotate, thereby driving the rotating shaft 300 to rotate, and further driving the first rotor assembly 1 to rotate.

[0031] The electric pump includes an inlet channel 400 and an outlet channel 500, and the inlet channel 400 and the outlet channel 500 are respectively connected to corresponding external components or pipelines; the rotating shaft 300 has a first channel 301, and the first channel 301 includes a first inlet 3011 and at least one first outlet 3012. Along the flow path direction, the first channel 301 is located downstream of the inlet channel 400, and the first outlet 3012 is connected to the second accommodating chamber 41; the pressure at the first inlet 3011 is greater than the pressure at the first outlet 3012, so that the fluid flows from the first inlet 3011 to the second accommodating chamber 41. The first outlet 3012 flows; the area where the stator assembly is located in the second accommodating cavity is defined as the first area, and along the flow direction, the stator assembly 200 is at least partially located between the outlet channel 500 and the first outlet 3012, or the first area 310 is at least partially located between the outlet channel 500 and the first outlet 3012 - along the flow direction, the first area can be directly connected to the outlet channel and the first outlet respectively, or another flow channel or cavity can be set between the first area and the outlet channel, or between the first area and the first outlet, all of which are within the protection scope of the present invention.

[0032] Since the first channel 301 is connected to the inlet channel 400, the pressure at the first inlet 3011 is greater than the pressure at the first outlet 3012, and the first outlet 3012 is connected to the second accommodating chamber 41, the fluid entering from the inlet channel 400 can flow into the second accommodating chamber 41, and the stator assembly 200 is located in the second accommodating chamber 41, and along the flow direction, the stator assembly 200 or the first area 310 is at least partially located between the outlet channel 500 and the first outlet 3012, so that when the fluid flows through the second accommodating chamber 41, it can contact the stator assembly 200, thereby performing heat exchange to reduce the temperature of the stator assembly 200.

[0033] The electric pump further includes a second connecting channel 32 and a receiving channel 33, both of which penetrate the bottom wall of the first receiving portion 3, and the second connecting channel 32 is communicated with the first receiving chamber 31 and the second receiving chamber 41 respectively, a fluid can flow in the second receiving chamber 41, and the fluid in the second receiving chamber 41 can enter the first receiving chamber 31 through the second connecting channel 32, and the first receiving chamber 31 is communicated with the outlet channel 500. The flow path of the electric pump at least includes an inlet channel 400, a first channel 301, a second receiving chamber 41, a second connecting channel 32, a first receiving chamber 31 and an outlet channel 500; along the flow path direction, the inlet channel 400 is located upstream of the first channel 301, the first channel 301 is located upstream of the second receiving chamber 41, the second receiving chamber 41 is located upstream of the second connecting channel 32, the second connecting channel 32 is located upstream of the first receiving chamber 31, and the first receiving chamber 31 is located upstream of the outlet channel 500.

[0034] The electric pump includes a first cover body 600, the first cover body 600 has a first connecting channel 601, and the first connecting channel 601 runs through the body of the first cover body 600; the inlet channel 400 is located in the first cover body 600, and the inlet channel 400 is connected to the first connecting channel 601; the first connecting channel 601 is connected to the first inlet 3011; in this embodiment, along the flow path direction, the first area or the stator assembly is at least partially located between the first outlet 3012 and the second connecting channel 32; in the axial direction, the stator assembly is at least partially located between the wall corresponding to the first outlet and the wall corresponding to the second connecting channel. In this way, the fluid flows out from the first outlet into the second accommodating chamber, contacts with at least part of the stator assembly in the second accommodating chamber to perform heat exchange, thereby reducing the temperature, and then enters the first accommodating chamber from the second connecting channel, and then flows to the outlet channel.

[0035] Part of the rotating shaft 300 is located in the accommodating channel 33 , and the rotating shaft 300 can rotate relative to a corresponding wall of the accommodating channel 33 .

[0036] The first rotor assembly 1 includes a first rotor 11 and a second rotor 12. The first rotor 11 has a plurality of external teeth 111 (in this embodiment, a plurality refers to at least three), and the second rotor 12 has a plurality of internal teeth 121. The second rotor 12 is located at the outer periphery of the first rotor 11. The first rotor 11 is connected to the rotating shaft 300. At least part of the external teeth 111 of the first rotor 11 is meshed with at least part of the internal teeth 121 of the second rotor 12. In this way, when the rotating shaft 300 drives the first rotor 11 to rotate, the first rotor 11 can simultaneously drive the second rotor 12 to rotate.

[0037] A volume chamber 13 is formed between the outer teeth 111 of the first rotor 11 and the inner teeth 121 of the second rotor 12 . The volume chamber 13 includes a suction area 14 and a discharge area 15 . The second connecting channel 32 is connected to the suction area 14 , and the outlet channel 500 is connected to the discharge area 15 .

[0038] A local vacuum can be formed in the suction area 14, the pressure is reduced, and the fluid in the second accommodating chamber 41 is sucked into the suction area 14 through the second connecting channel 32; while in the discharge area 15, the fluid therein will be squeezed, the corresponding pressure will increase, and then it will flow to the outlet channel 500.

[0039] The walls corresponding to the second connecting channel 32 include a first side wall 321 and a second side wall 322. The first side wall 321 is closer to the central axis of the first rotor 11 than the second side wall 322. The projection of the first side wall 321 on the first cover body 600 is tangent to the projection of the tooth roots of the external teeth 111 of the first rotor 11 on the first cover body 600. The projection of the second side wall 322 on the first cover body 600 is tangent to the projection of the tooth roots of the internal teeth 121 of the second rotor 12 on the first cover body 600. In this way, the projection of the wall corresponding to the volume chamber 13 in the suction zone 14 on the bottom wall of the first accommodating portion 3 is located between the first side wall 321 and the second side wall 322, or the projection of the wall corresponding to the volume chamber 13 in the suction zone 14 on the bottom wall of the first accommodating portion 3 overlaps with the first side wall 321 or the second side wall 322, so that the fluid flowing through the second connecting channel 32 can effectively enter the suction zone 14 to improve the efficiency of the electric pump.

[0040] Along the rotation direction of the first rotor assembly 1 , the distance between the first side wall 321 and the second side wall 322 gradually increases, which is beneficial to increase the amount of fluid sucked into the suction area 14 per unit time, thereby improving the efficiency of the electric pump.

[0041] The "tangent" mentioned above is a theoretical tangent, but there may be errors in the actual processing or assembly of parts. All offsets within the range of processing error and assembly error are within the protection scope of the present invention.

[0042] The end surface of the first cover body 600 facing one end of the first rotor assembly 1 is concave to form a first groove 602, and the aforementioned outlet channel 500 is formed between the wall corresponding to the first groove 602 and the first rotor assembly 1, and the outlet channel 500 is connected to the discharge area 15; the wall corresponding to the outlet channel 500 includes a third side wall 501 and a fourth side wall 502, the third side wall 501 is closer to the central axis of the first rotor 11 than the fourth side wall 502, the projection of the third side wall 501 on the first cover body 600 is tangent to the projection of the tooth root of the external teeth 111 of the first rotor 11 on the first cover body 600, and the projection of the fourth side wall 502 on the bottom wall of the first accommodating portion 3 is tangent to the tooth root of the internal teeth 121 of the second rotor 12 The projection of the bottom wall of the accommodating portion 3 is tangent, so that the projection of the wall corresponding to the volume cavity 13 in the discharge area 15 on the bottom wall of the first accommodating portion 3 is located between the third side wall 501 and the fourth side wall 502, or the projection of the wall corresponding to the volume cavity 13 in the discharge area 15 on the bottom wall of the first accommodating portion 3 coincides with the third side wall 501 or the fourth side wall 502, so that the fluid located in the discharge area 15 can effectively enter the outlet channel 500 to improve the efficiency of the electric pump; along the rotation direction of the first rotor assembly 1, the distance between the third side wall 501 and the fourth side wall 502 gradually decreases, so that the fluid from the discharge area 15 is facilitated to enter the outlet channel 500, thereby improving the efficiency of the electric pump.

[0043] The electric pump also includes a housing 100 and a second cover 700, the second cover 700 is fixed to the housing 100 and sealed, and the second accommodating portion 4 is located between the second cover 700 and the housing 100; the second cover 700 includes a first flange portion 701, the first flange portion 701 protrudes from the main body of the second cover 700 and extends toward the rotating shaft 300 in the axial direction; a limiting portion 7011 and a diverter portion 7012 are provided at the end of the first flange portion 701, the limiting portion 7011 is connected to the diverter portion 7012, and in the axial direction, the diverter portion 7012 is farther away from the main body of the second cover 700 than the limiting portion 7011. body; the diameter of the limiting portion 7011 remains constant, the limiting portion 7011 is at least partially located in the first channel 301, and the limiting portion 7011 cooperates with the wall gap corresponding to the first channel 301, so that the limiting portion 7011 limits the rotating shaft 300 to prevent the rotating shaft 300 from shaking; the diverter portion 7012 is located in the first channel 301; in the direction of the rotating shaft 300 toward the second cover body 700, the diameter of the diverter portion 7012 gradually increases, so that the diverter portion 7012 can not only guide the fluid, but also reduce the kinetic energy loss of the fluid when flowing from the first channel 301 to the first outlet 3012.

[0044] The rotating shaft 300 has a first end 302, and the first end 302 is arranged toward the second cover body 700. In the present embodiment, the number of the first outlets 3012 is at least two, and the first outlets 3012 are evenly distributed along the circumferential direction, and the first outlets 3012 penetrate the wall corresponding to the first channel 301 in the radial direction. In the axial direction, the minimum distance between the wall corresponding to the first outlet 3012 and the end face of the first end 302 is a, the maximum distance between the wall corresponding to the first outlet 3012 and the end face of the first end 302 is b, and the minimum distance between the diverter 7012 and the end face of the first end 302 is c, c is greater than or equal to a, and c is less than b. In this way, the generation of vortex between the diverter 7012 and the wall corresponding to the first channel 301 can be reduced, thereby reducing the loss of fluid kinetic energy.

[0045] The end surface of one end of the shell 100 is concave inwardly along the axial direction to form the aforementioned first accommodating portion 3 , the first cover body 600 is fixed to one end of the shell 100 , and the first accommodating cavity 31 is located between the bottom wall corresponding to the first accommodating portion 3 and the first cover body 600 .

[0046] In this embodiment, the flow path of the fluid is: inlet channel 400, first connecting channel 601, first channel 301, second accommodating chamber 41, second connecting channel 32, suction area 14 of first accommodating chamber 31, discharge area 15 of first accommodating chamber 31, outlet channel 500.

[0047] Figure 8-13 Another embodiment is shown. In this embodiment,

[0048] The electric pump also includes a third connecting channel 604, which is connected to the first accommodating chamber 31 and the first inlet 3011 respectively; the flow path of the electric pump includes at least an inlet channel 400, a first accommodating chamber 31, a third connecting channel 604, a first channel 301, a second accommodating chamber 41 and an outlet channel 500; along the flow path direction, the inlet channel 400 is located upstream of the first accommodating chamber 31, the first accommodating chamber 31 is located upstream of the third connecting channel 604, the third connecting channel 604 is located upstream of the first channel 301, the first channel 301 is located upstream of the second accommodating chamber 41, and the second accommodating chamber 41 is located upstream of the outlet channel 500.

[0049] The end surface of the first cover body 600 facing the first rotor assembly 1 is concave to form a second groove 605, and the wall corresponding to the second groove 605 and the first rotor assembly 1 form the aforementioned third connecting channel 604. The outlet channel 500 is located at the end of the housing 100 facing away from the second cover body 700, and the outlet channel 500 passes through the end surface of this end, and the outlet channel 500 is connected to the second accommodating chamber 41. The area where the stator assembly is located in the second accommodating chamber is defined as the first area. Along the flow path direction, the first area 310 is at least partially located between the outlet channel 500 and the first outlet 3012. In this embodiment, in the axial direction, the stator assembly is at least partially located between the wall corresponding to the first outlet and the wall corresponding to the outlet channel. In this way, the fluid flows out from the first outlet into the second accommodating chamber, contacts with at least part of the stator assembly in the second accommodating chamber to exchange heat, thereby reducing the temperature, and then flows to the outlet channel.

[0050] The first rotor assembly 1 includes a first rotor 11 and a second rotor 12. The first rotor 11 has a plurality of external teeth 111, and the second rotor 12 has a plurality of internal teeth 121. The second rotor 12 is located at the outer periphery of the first rotor 11, and the first rotor 11 is connected to the rotating shaft 300. At least part of the external teeth 111 of the first rotor 11 is meshed with at least part of the internal teeth 121 of the second rotor 12. A volume cavity 13 is formed between the external teeth 111 of the first rotor 11 and the internal teeth 121 of the second rotor 12. The volume cavity 13 includes a suction area 14 and a discharge area 15. The first connecting channel 601 is connected to the suction area 14, and the discharge area 15 is connected to the third connecting channel 604.

[0051] A local vacuum can be formed in the suction area 14, the pressure is reduced, and the fluid flowing into the inlet channel 400 is sucked into the suction area 14 through the first connecting channel 601; while in the discharge area 15, the fluid therein will be squeezed, the corresponding pressure will increase, and then it will flow to the third connecting channel 604, and then flow into the first channel 301 and then enter the second accommodating chamber 41.

[0052] The walls corresponding to the first connecting channel 601 include a fifth side wall 6011 and a sixth side wall 6012. The fifth side wall 6011 is closer to the central axis of the first rotor 11 than the sixth side wall 6012. The projection of the fifth side wall 6011 on the first cover body 600 is tangent to the projection of the tooth roots of the external teeth 111 of the first rotor 11 on the first cover body 600. The projection of the sixth side wall 6012 on the bottom wall of the first accommodating portion 3 is tangent to the projection of the tooth roots of the internal teeth 121 of the second rotor 12 on the bottom wall of the first accommodating portion 3. In this way, the projection of the wall corresponding to the volume chamber 13 in the suction zone 14 on the bottom wall of the first accommodating portion 3 is located between the fifth side wall 6011 and the sixth side wall 6012, or the projection of the wall corresponding to the volume chamber 13 in the suction zone 14 on the bottom wall of the first accommodating portion 3 overlaps with the fifth side wall 6011 or the sixth side wall 6012, so that the fluid in the first connecting channel 601 can effectively enter the suction zone 14 to improve the efficiency of the electric pump.

[0053] Along the rotation direction of the first rotor assembly 1, the distance between the fifth side wall 6011 and the sixth side wall 6012 gradually increases, which is beneficial to increase the amount of fluid sucked into the suction area 14 per unit time, thereby improving the efficiency of the electric pump.

[0054] The walls corresponding to the third connecting channel 604 include a seventh side wall 6041 and an eighth side wall 6042. The seventh side wall 6041 is closer to the central axis of the first rotor 11 than the eighth side wall 6042. The projection of the seventh side wall 6041 on the first cover body 600 is tangent to the projection of the tooth roots of the external teeth 111 of the first rotor 11 on the first cover body 600. The projection of the eighth side wall 6042 on the bottom wall of the first accommodating portion 3 is tangent to the projection of the tooth roots of the internal teeth 121 of the second rotor 12 on the bottom wall of the first accommodating portion 3. In this way, the projection of the wall corresponding to the volume cavity 13 in the discharge area 15 on the bottom wall of the first accommodating portion 3 is located between the seventh side wall 6041 and the eighth side wall 6042, or the projection of the wall corresponding to the volume cavity 13 in the discharge area 15 on the bottom wall of the first accommodating portion 3 overlaps with the seventh side wall 6041 or the eighth side wall 6042, so that the fluid located in the discharge area 15 can effectively enter the third connecting channel 604 to improve the efficiency of the electric pump.

[0055] Along the rotation direction of the first rotor assembly 1, the distance between at least a portion of the seventh side wall 6041 and the eighth side wall 6042 gradually decreases, which is conducive to the fluid discharge area 15 entering the third connecting channel 604 and then entering the second accommodating chamber 41 through the first channel 301, thereby improving the efficiency of the electric pump.

[0056] The "tangent" mentioned above is a theoretical tangent, but there may be errors in the actual processing or assembly of parts. All offsets within the range of processing error and assembly error are within the protection scope of the present invention.

[0057] In this embodiment, the flow path of the fluid is: inlet channel 400, first connecting channel 601, suction area 14 of the first accommodating chamber 31, discharge area 15 of the first accommodating chamber 31, third connecting channel 604, first channel 301, second accommodating chamber 41, outlet channel 500.

[0058] It should be noted that: although this specification has described the present application in detail with reference to the above-mentioned implementation methods, ordinary technicians in the field should understand that technicians in the relevant technical field can still modify, combine or replace the present application with equivalents, 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, comprising a first accommodating portion (3), a second accommodating portion (4), a first rotor assembly (1), a second rotor assembly (2), a stator assembly (200) and a rotating shaft (300), wherein the first accommodating portion (3) has a first accommodating cavity (31), the second accommodating portion (4) has a second accommodating cavity (41), the first rotor assembly (1) is located in the first accommodating cavity (31), a portion of the first rotor assembly (1) is fixed to or connected to the rotating shaft (300), the second rotor assembly (2) and the stator assembly (200) are located in the second accommodating cavity (41), a portion of the second rotor assembly (2) is fixed to or connected to the rotating shaft (300), The electric pump comprises an inlet channel (400) and an outlet channel (500), It is characterized in that The rotating shaft (300) has a first channel (301), the first channel (301) includes a first inlet (3011) and at least one first outlet (3012), along the flow path direction, the first channel (301) is located downstream of the inlet channel (400), and the first outlet (3012) is communicated with the second accommodating chamber (41); The pressure at the first inlet (3011) is greater than the pressure at the first outlet (3012); Along the flow path direction, the stator assembly (200) is at least partially located between the outlet channel (500) and the first outlet (3012).

2. An electric pump according to claim 1, characterized in that: The electric pump further comprises a second connecting channel (32), wherein the second connecting channel (32) is communicated with the first accommodating chamber (31) and the second accommodating chamber (41) respectively. The flow path of the electric pump at least comprises an inlet channel (400), a first channel (301), a second accommodating chamber (41), a second connecting channel (32), a first accommodating chamber (31) and an outlet channel (500); along the flow path direction, the inlet channel (400) is located upstream of the first channel (301), the first channel (301) is located upstream of the second accommodating chamber (41), the second accommodating chamber (41) is located upstream of the second connecting channel (32), the second connecting channel (32) is located upstream of the first accommodating chamber (31), and the first accommodating chamber (31) is located upstream of the outlet channel (500); Along the flow path direction, the stator assembly (200) is at least partially located between the first outlet (3012) and the second connecting channel (32).

3. An electric pump according to claim 2, characterized in that: The electric pump comprises a first cover body (600), wherein the first cover body (600) has a first connecting channel (601), and the first connecting channel (601) runs through the body of the first cover body (600); The inlet channel (400) is located in the first cover body (600), and the inlet channel (400) is in communication with the first connecting channel (601); The first connecting channel (601) is in communication with the first inlet (3011).

4. An electric pump according to claim 3, characterized in that: The first rotor assembly (1) comprises a first rotor (11) and a second rotor (12), the first rotor (11) having a plurality of external teeth (111), the second rotor (12) having a plurality of internal teeth (121), the second rotor (12) being located on the outer periphery of the first rotor (11), and the first rotor (11) being connected to the rotating shaft (300); At least part of the external teeth (111) of the first rotor (11) meshes with at least part of the internal teeth (121) of the second rotor (12); A volume cavity (13) is formed between the outer teeth (111) of the first rotor (11) and the inner teeth (121) of the second rotor (12). The volume chamber (13) comprises a suction area (14) and a discharge area (15), The second connecting channel (32) is in communication with the suction zone (14), and the outlet channel (500) is in communication with the discharge zone (15).

5. An electric pump according to claim 4, characterized in that: The wall corresponding to the second connecting channel (32) comprises a first side wall (321) and a second side wall (322), the first side wall (321) being closer to the central axis of the first rotor (11) than the second side wall (322), the projection of the first side wall (321) on the first cover body (600) being tangent to the projection of the tooth roots of the external teeth (111) of the first rotor (11) on the first cover body (600), and the projection of the second side wall (322) on the first cover body (600) being tangent to the projection of the tooth roots of the internal teeth (121) of the second rotor (12) on the first cover body (600); Along the rotation direction of the first rotor assembly (1), the distance between the first side wall (321) and the second side wall (322) gradually increases.

6. An electric pump according to claim 4, characterized in that: The end surface of the first cover body (600) facing one end of the first rotor assembly (1) is concave to form a first groove (602), and the outlet channel (500) is formed between a wall corresponding to the first groove (602) and the first rotor assembly (1), and the outlet channel (500) is in communication with the discharge area (15); The wall corresponding to the outlet channel (500) comprises a third side wall (501) and a fourth side wall (502); the third side wall (501) is closer to the central axis of the first rotor (11) than the fourth side wall (502); a projection of the third side wall (501) on the first cover body (600) is tangent to a projection of the tooth root of the external tooth (111) of the first rotor (11) on the first cover body (600); The projection of the fourth side wall (502) on the bottom wall of the first accommodating portion (3) is tangent to the projection of the tooth root of the internal teeth (121) of the second rotor (12) on the bottom wall of the first accommodating portion (3); Along the rotation direction of the first rotor assembly (1), the distance between the third side wall (501) and the fourth side wall (502) gradually decreases.

7. An electric pump according to claim 1, characterized in that: The electric pump further comprises a third connecting channel (604), wherein the third connecting channel (604) is respectively connected to the first accommodating chamber (31) and the first inlet (3011); The flow path of the electric pump at least comprises an inlet channel (400), a first accommodating chamber (31), a third connecting channel (604), a first channel (301), a second accommodating chamber (41) and an outlet channel (500); along the flow path direction, the inlet channel (400) is located upstream of the first accommodating chamber (31), the first accommodating chamber (31) is located upstream of the third connecting channel (604), the third connecting channel (604) is located upstream of the first channel (301), the first channel (301) is located upstream of the second accommodating chamber (41), and the second accommodating chamber (41) is located upstream of the outlet channel (500).

8. An electric pump according to claim 7, characterized in that: The electric pump comprises a first cover body (600), wherein the first cover body (600) has a first connecting channel (601), and the first connecting channel (601) runs through the body of the first cover body (600); The inlet channel (400) is located in the first cover body (600), and the inlet channel (400) is in communication with the first connecting channel (601); The first connecting channel (601) is in communication with the first accommodating chamber (31).

9. An electric pump according to claim 8, characterized in that: The first rotor assembly (1) comprises a first rotor (11) and a second rotor (12), the first rotor (11) having a plurality of external teeth (111), the second rotor (12) having a plurality of internal teeth (121), the second rotor (12) being located on the outer periphery of the first rotor (11), and the first rotor (11) being connected to the rotating shaft (300); At least part of the external teeth (111) of the first rotor (11) meshes with at least part of the internal teeth (121) of the second rotor (12); A volume cavity (13) is formed between the outer teeth (111) of the first rotor (11) and the inner teeth (121) of the second rotor (12). The volume chamber (13) comprises a suction area (14) and a discharge area (15), The first connecting channel (601) is in communication with the suction zone (14), and the discharge zone (15) is in communication with the third connecting channel (604).

10. An electric pump according to claim 9, characterized in that: The walls corresponding to the first connecting channel (601) include a fifth side wall (6011) and a sixth side wall (6012); the fifth side wall (6011) is closer to the central axis of the first rotor (11) than the sixth side wall (6012); the projection of the fifth side wall (6011) on the first cover body (600) is tangent to the projection of the tooth roots of the external teeth (111) of the first rotor (11) on the first cover body (600); and the projection of the sixth side wall (6012) on the bottom wall of the first accommodating portion (3) is tangent to the projection of the tooth roots of the internal teeth (121) of the second rotor (12) on the bottom wall of the first accommodating portion (3); Along the rotation direction of the first rotor assembly (1), the distance between the fifth side wall (6011) and the sixth side wall (6012) gradually increases.

11. An electric pump according to claim 9, characterized in that: The walls corresponding to the third connecting channel (604) include a seventh side wall (6041) and an eighth side wall (6042); the seventh side wall (6041) is closer to the central axis of the first rotor (11) than the eighth side wall (6042); the projection of the seventh side wall (6041) on the first cover body (600) is tangent to the projection of the tooth roots of the external teeth (111) of the first rotor (11) on the first cover body (600); and the projection of the eighth side wall (6042) on the bottom wall of the first accommodating portion (3) is tangent to the projection of the tooth roots of the internal teeth (121) of the second rotor (12) on the bottom wall of the first accommodating portion (3); Along the rotation direction of the first rotor assembly (1), the distance between at least a portion of the seventh side wall (6041) and the eighth side wall (6042) gradually decreases.

12. An electric pump according to any one of claims 1 to 11, characterized in that: The electric pump further comprises a housing (100) and a second cover (700), wherein the second cover (700) is fixed to the housing (100), and the second accommodation portion (4) is located between the second cover (700) and the housing (100); The second cover body (700) comprises a first flange portion (701), wherein the first flange portion (701) protrudes from the body of the second cover body (700) and extends toward the rotating shaft (300) along an axial direction; A limiting portion (7011) and a diverter portion (7012) are provided at the end of the first flange portion (701), the limiting portion (7011) is connected to the diverter portion (7012), and in the axial direction, the diverter portion (7012) is farther away from the main body of the second cover body (700) than the limiting portion (7011); The diameter of the limiting portion (7011) remains constant, the limiting portion (7011) is at least partially located in the first channel (301), and the limiting portion (7011) is matched with a wall gap corresponding to the first channel (301); The diverter portion (7012) is located in the first channel (301); in the direction from the rotating shaft (300) toward the second cover body (700), the diameter of the diverter portion (7012) gradually increases. The rotating shaft (300) has a first end (302), and the first end (302) is disposed toward the second cover (700). The first outlet (3012) penetrates the wall corresponding to the first channel (301) in the radial direction. In the axial direction, the minimum distance between the wall corresponding to the first outlet (3012) and the end face of the first end (302) is a, the maximum distance between the wall corresponding to the first outlet (3012) and the end face of the first end (302) is b, and the minimum distance between the diverter (7012) and the end face of the first end (302) is c, where c is greater than or equal to a, and c is less than b.

Images