Pump

Abstract

A pump comprises a first rotor assembly, a stator assembly and a second rotor assembly, the pump is provided with a first containing cavity and a second containing cavity, the first rotor assembly is arranged in the first containing cavity, the stator assembly and the second rotor assembly are arranged in the second containing cavity, and the pump comprises a rotating shaft and a first sleeve. The first sleeve comprises a first sleeve part, the first sleeve part and the rotating shaft rotate synchronously, the first sleeve part surrounds the rotating shaft, the pump comprises a first channel, the first channel is located between the first sleeve part and the rotating shaft, the first sleeve part is provided with a first through hole, and the first through hole is communicated with the first channel. The first through hole penetrates through the wall part of the first sleeve part, the pump comprises an outflow channel, the first channel is communicated with the outflow channel and the first through hole, and the first through hole is communicated with the first channel and the second containing cavity. The heat dissipation efficiency of the stator assembly is improved.

Description

[Technical field]

[0001] The present invention relates to the technical field of fluid control, in particular to a pump. [Background technology]

[0002] A pump provides a power source for a lubrication system and / or cooling system of a vehicle. The pump includes a stator assembly. The stator assembly generates heat when working. If the heat accumulates to a certain level and cannot be dissipated in time, it will affect the performance of the stator assembly, thereby reducing the service life of the pump.

[0003] refer to Fig.11 , pump 100 、 Including pump housing 7 、 、First rotor assembly 1 、 、Stator assembly 4 、 , the second rotor assembly 2 、 and pump shaft 3 、 , the first rotor assembly 1 、 , the second rotor assembly 2 、 And stator assembly 4 、 Along the pump 100 、 Axial setting, pump 100 、 A first receiving portion 80 is provided 、 and the second accommodation portion 90 、 , the first accommodation portion 80 、 Having a first accommodating cavity 800 、 , the second accommodation portion 90 、 Having a second accommodating cavity 900 、 , the first rotor assembly 1 、 Located in the first accommodation chamber 800 、 , stator assembly 4 、 , the second rotor assembly 2 、 Located in the second accommodation chamber 900 、 , stator assembly 4 、 Enclosed in the second rotor assembly 2 、 , the first rotor assembly 1 、 Located on pump axis 3 、 One end of the second rotor assembly 2 、 Located on pump axis 3 、 the other end.

[0004] The first accommodation portion 80 、 Including bottom wall 802 、 , bottom wall 802 、 Capable of supporting the first rotor assembly 1 、 , the first accommodating chamber 800 、 Located at bottom wall 802 、 On one side, the second accommodating cavity 900 、 Located at bottom wall 802、 On the other side, pump 100 、 Also includes a first channel 10 、 , first channel 10 、 Through the bottom wall 802 、 , first channel 10 、 Can be connected to the first accommodating chamber 800 、 and the second accommodation chamber 900 、 , the first accommodating chamber 800 、 The working medium can flow through the first accommodating chamber 800. 、 Part of the working medium in the first channel 10 can pass through 、 Flowing into the second accommodation chamber 900 、 and located in the second accommodation cavity 900 、 Stator assembly 4 、 Contact is required to cool the stator assembly, and the flow rate of the working medium in the second accommodating chamber needs to be improved. [Summary of the invention]

[0005] In order to solve the above problems, the following technical solutions are provided: a pump, comprising a first rotor assembly, a stator assembly and a second rotor assembly, the pump having a first accommodating chamber and a second accommodating chamber, the first rotor assembly being arranged in the first accommodating chamber, the stator assembly and the second rotor assembly being arranged in the second accommodating chamber, the pump comprising a rotating shaft and a first sleeve, the first sleeve comprising a first sleeve portion, the first sleeve portion rotates synchronously with the rotating shaft, the first sleeve portion is arranged around the rotating shaft, the pump comprises a first channel, the first channel is located between the first sleeve portion and the rotating shaft, the first sleeve portion has a first through hole, the first through hole passes through the wall of the first sleeve portion, the pump comprises an outflow channel, the first channel connects the outflow flow channel and the first through hole, the first through hole connects the first channel and the second accommodating chamber.

[0006] Such a pump, the first sleeve includes a first sleeve portion, the first sleeve portion rotates synchronously with the rotating shaft, the first sleeve portion has a first through hole, the first through hole passes through the wall of the first sleeve portion, the pump includes an outflow channel and a first channel, the first channel connects the outflow channel and the first through hole, the first through hole connects the first channel and the second accommodating chamber, when the pump is working, since the first sleeve portion rotates synchronously with the rotating shaft, when the working medium flows out from the first through hole to the second accommodating chamber, the flow velocity increases under the action of centrifugal force, thereby improving the flow velocity of the working medium in the second accommodating chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a perspective view of an embodiment of a pump in the present invention;

[0008] Figure 2is a top view of an embodiment of a pump in the present invention;

[0009] Figure 3 is a cross-sectional view of an embodiment of a pump in the present invention;

[0010] Figure 4 yes Figure 3 A partial enlarged view of part A;

[0011] Figure 5 is a top view of a first sleeve of an embodiment of a pump in the present invention;

[0012] Figure 6 is a top view of a rotating shaft of an embodiment of a pump in the present invention;

[0013] Figure 7 is a top view of a pump cover of one embodiment of a pump in the present invention;

[0014] Figure 8 is a perspective view of a pump cover of one embodiment of a pump in the present invention;

[0015] Fig. 9 It is a partial structural schematic diagram of another embodiment of the pump in the present invention;

[0016] Fig.10 It is a partial structural schematic diagram of another embodiment of the pump in the present invention;

[0017] Fig.11 It is a structural schematic diagram of the background technology.

[0018] Reference numerals:

[0019] Inner rotor 11, outer rotor 12,

[0020] stator assembly 2, second rotor assembly 3,

[0021] The rotating shaft 4, the first protrusion 41, the second groove 42, the third channel 43,

[0022] The first sleeve portion 51, the first through hole 511, the first connecting portion 512, the first groove 5121, the first groove wall 5122, the second groove wall 5123, the second connecting portion 513, the second protrusion 5131, the third connecting portion 514,

[0023] First channel 6,

[0024] Pump cover 7, first stopper 71, outflow channel 72, second channel 73, first mounting hole 74, inflow channel 75,

[0025] Pump housing 8, first accommodating portion 81, first accommodating cavity 811, bottom wall portion 812, extension portion 813, second accommodating portion 82, second accommodating cavity 821,

[0026] Circuit board 9. DETAILED DESCRIPTION

[0027] The technical solution of the specific implementation method is described below in conjunction with the accompanying drawings.

[0028] It should be noted that: although this specification has described the present invention in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that technicians in the relevant technical field can still modify, combine or replace the present invention with equivalents, and all technical solutions and improvements thereto that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

[0029] See also Figure 1-Figure 4 The pump includes a pump housing 8, a first rotor assembly, a stator assembly 2, a second rotor assembly 3, a rotating shaft 4 and a circuit board 9. The pump has a first accommodating portion 81 and a second accommodating portion 82. The first accommodating portion 81 has a first accommodating cavity 811, and the second accommodating portion 82 has a second accommodating cavity 821. The first rotor assembly is arranged in the first accommodating cavity 811, and the stator assembly 2 and the second rotor assembly 3 are arranged in the second accommodating cavity 821. The stator assembly 2 is arranged around the outer periphery of the second rotor assembly 3. The stator assembly 2 includes a stator core and a coil. When the pump is working, the circuit board 9 controls the current passing through the coil to change according to a predetermined rule, thereby controlling the stator assembly 2 to generate a changing excitation magnetic field. The second rotor assembly 3 rotates under the action of the excitation magnetic field, and the second rotor assembly 3 can drive the first rotor assembly to rotate.

[0030] See also Figure 1-Figure 4 The first rotor assembly includes an inner rotor 11 and an outer rotor 12. The inner rotor 11 includes a plurality of outer teeth, and the outer rotor 12 includes a plurality of inner teeth. A volume cavity is provided between the outer teeth of the inner rotor 11 and the inner teeth of the outer rotor 12. An eccentricity exists between the inner rotor 11 and the outer rotor 12. When the inner rotor 11 rotates, at least part of the outer teeth of the inner rotor 11 meshes with at least part of the inner teeth of the outer rotor 12, so that the inner rotor 11 can drive the outer rotor 12 to rotate.

[0031] refer to Figure 1-Figure 4 , Figure 7 The pump also includes an inlet channel 75 and an outlet channel 72. The inlet channel 75 is used for the inflow of the working medium, and the outlet channel 72 is used for the outflow of the working medium. The working medium can enter the volume chamber through the inlet channel 75, and the working medium can leave the volume chamber through the outlet channel 72. When the first rotor assembly rotates, the volume of the volume chamber changes, so that the working medium is pressed out to the outlet channel 72 to generate flow power.

[0032] refer to Figure 3-Figure 4The pump includes a rotating shaft 4 and a first sleeve, the first sleeve includes a first sleeve portion 51, the first sleeve portion 51 rotates synchronously with the rotating shaft 4, the first sleeve portion 51 is arranged around the rotating shaft 4, the pump includes a first channel 6, the first channel 6 is located between the first sleeve portion 51 and the rotating shaft 4, the first sleeve portion 51 has a first through hole 511, the first through hole 511 passes through the wall of the first sleeve portion 51, the pump includes an outflow channel 72, the first channel 6 connects the outflow channel and the first through hole 511, the first through hole 511 connects the first channel 6 and the second accommodating chamber 821.

[0033] In such a pump, the first sleeve includes a first sleeve portion 51, which rotates synchronously with the rotating shaft 4, and the first sleeve portion 51 has a first through hole 511, which passes through the wall of the first sleeve portion 51. The pump includes an outflow channel 72 and a first channel 6, and the first channel 6 connects the outflow channel and the first through hole 511, and the first through hole 511 connects the first channel 6 and the second accommodating chamber 821. When the pump is working, since the first sleeve portion 51 rotates synchronously with the rotating shaft 4, when the working medium flows out from the first through hole 511 to the second accommodating chamber 821, the flow velocity increases under the action of centrifugal force, thereby improving the flow velocity of the working medium in the second accommodating chamber 821.

[0034] The inner rotor 11 is sleeved on the first sleeve portion 51 , and the inner rotor 11 rotates synchronously with the first sleeve portion 51 , which will not be described in detail herein.

[0035] refer to Figure 3-Figure 4 The first accommodating portion 81 includes a bottom wall portion 812 and an extending portion 813 . The extending portion 813 extends from the bottom wall portion 812 toward the second rotor assembly 3 , and the first sleeve portion 51 passes through the extending portion 813 .

[0036] The first through hole 511 may be located above the stator assembly 2 , or may be located in the radial direction of the rotating shaft 4 , with some portions thereof being opposite to each other, which will not be described in detail herein.

[0037] refer to Figure 3-Figure 4 There are multiple first through holes 511, and the multiple first through holes 511 are arranged along the circumference of the first sleeve portion 51. For example, there are 4 first through holes 511, and the 4 first through holes 511 are equidistantly arranged along the circumference of the first sleeve portion 51, so as to improve the uniformity of the flow of the working medium around the stator assembly 2 and enhance the heat dissipation effect of the rotor assembly.

[0038] The first through hole 511 may be a round hole, a square hole, etc., which will not be described in detail here.

[0039] refer to Figure 3-Figure 6The first sleeve includes a first connecting portion 512, which is located at one end of the first sleeve portion 51, and the first connecting portion 512 and the first sleeve portion 51 are integrally injection molded. The first connecting portion 512 is sleeved on the rotating shaft 4, and the pump includes a first protrusion 41, which is fixed to the outer wall of the rotating shaft 4, and the first protrusion 41 is welded and fixed to the rotating shaft 4. The first connecting portion 512 has a first groove 5121, and the first groove 5121 is recessed in the wall of the first connecting portion 512 facing the second rotor assembly 3. The first protrusion 41 is at least partially located in the first groove 5121. A groove 5121 has a first groove wall 5122 and a second groove wall 5123. In the circumferential direction of the first sleeve portion 51, the first groove wall 5122 is located on one side of the first protrusion 41, and the second groove wall 5123 is located on the other side of the first protrusion 41. When the rotating shaft 4 rotates, the first protrusion 41 abuts against the first groove wall 5122, thereby driving the first sleeve portion 51 to rotate synchronously. At the same time, a second side wall is provided to better cooperate with the first protrusion 41 and the first groove 5121, that is, the first protrusion and the first groove 5121 are limited in the circumferential direction of the rotating shaft 4 to prevent a large impact.

[0040] Of course, the rotating shaft 4 and the first protrusion 41 can be an integral part, for example, formed by metal cutting, which will not be described in detail here.

[0041] refer to Figure 3-Figure 4 , Figure 7 The pump includes a pump cover 7, which includes a first stopper 71. The first stopper 71 is located on the side of the pump cover 7 facing the second rotor assembly 3. The other end of the first sleeve portion 51 abuts against the first stopper 71, so that the first sleeve runs stably.

[0042] refer to Figure 3-Figure 4 , Figure 7 The pump cover 7 has an outflow channel 72, which is recessed in the side of the pump cover 7 facing the second rotor assembly 3. The pump cover 7 has a second channel 73, which is recessed in the first stop portion 71. The second channel 73 connects the outflow channel 72 and the first channel 6. Since the other end of the first sleeve portion 51 abuts against the first stop portion 71, the working medium can flow from the outflow channel 72 into the second channel 73 and then into the first channel 6.

[0043] refer to Figure 3-Figure 4 , Figure 8 The pump includes a third channel 43, which penetrates the rotating shaft 4 in the axial direction of the rotating shaft 4. The pump also includes a pump cover 7, which has an inlet channel 75, which penetrates the pump cover 7. The pump cover 7 includes a first mounting hole 74, which penetrates the pump cover 7. A portion of the rotating shaft 4 is located in the first mounting hole 74, and the rotating shaft 4 can rotate in the first mounting hole 74. The third channel 43 is connected to the inlet channel 75.

[0044] refer to Figure 3-Figure 4 , Figure 7-Figure 8 When the pump is working, one of the flow paths of the working medium is: the outflow channel 72 → the second channel 73 → the first channel 6 → the first through hole 511 → the second accommodating chamber 821 → the third channel 43 → the inflow channel 75 .

[0045] refer to Fig. 9 The first sleeve includes a second connecting portion 513, which is located at one end of the first sleeve portion 51, and the second connecting portion 513 is sleeved on the rotating shaft 4. The rotating shaft 4 has a second groove 42, and the second groove 42 is recessed in the outer wall of the rotating shaft 4. The first sleeve includes a second protrusion 5131, and the second protrusion 5131 protrudes from the inner wall of the second connecting portion 513. The second protrusion 5131 is located in the second groove 42. The second groove 42 has a third groove wall and a fourth groove wall. In the circumferential direction of the rotating shaft 4, the third groove wall is located on one side of the second protrusion 5131, and the fourth groove wall is located on the other side of the second protrusion 5131. The first sleeve is injection molded with the rotating shaft 4 as an insert.

[0046] refer to Fig.10 The first sleeve includes a third connecting portion 514 , the third connecting portion 514 is located at one end of the first sleeve portion 51 , the third connecting portion 514 is sleeved on the rotating shaft 4 , and the third connecting portion 514 is welded to the rotating shaft 4 .

[0047] Of course, the first sleeve can be a metal part, or the third connecting part 514 can be a metal part, and the first sleeve part 51 is injection molded with the third connecting part 514 as an insert, etc., which will not be elaborated here.

[0048] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A pump, comprising a first rotor assembly, a stator assembly (2) and a second rotor assembly (3), the pump having a first accommodating chamber (811) and a second accommodating chamber (821), the first rotor assembly being arranged in the first accommodating chamber (811), the stator assembly (2) and the second rotor assembly (3) being arranged in the second accommodating chamber (821), characterized in that: The pump comprises a rotating shaft (4) and a first sleeve, wherein the first sleeve comprises a first sleeve portion (51), wherein the first sleeve portion (51) rotates synchronously with the rotating shaft (4), and the first sleeve portion (51) is arranged around the rotating shaft (4); the pump comprises a first channel (6), wherein the first channel (6) is located between the first sleeve portion (51) and the rotating shaft (4); the first sleeve portion (51) has a first through hole (511), and the first through hole (511) passes through a wall of the first sleeve portion (51); the pump comprises an outflow channel (72), wherein the first channel (6) communicates with the outflow channel and the first through hole (511), and the first through hole (511) communicates with the first channel (6) and the second accommodating chamber (821).

2. The pump according to claim 1, characterized in that There are a plurality of the first through holes (511), and the plurality of the first through holes (511) are arranged along the circumferential direction of the first sleeve portion (51).

3. The pump according to claim 2, characterized in that The first sleeve comprises a first connecting portion (512), the first connecting portion (512) is located at one end of the first sleeve portion (51), the first connecting portion (512) is sleeved on the rotating shaft (4), the pump comprises a first protrusion (41), the first protrusion (41) is fixed to the outer wall of the rotating shaft (4), the first connecting portion (512) has a first groove (5121), the first groove (5121) is recessed in the wall portion of the first connecting portion (512) facing the second rotor assembly (3), the first protrusion (41) is at least partially located in the first groove (5121), the first groove (5121) has a first groove wall (5122) and a second groove wall (5123), in the circumferential direction of the first sleeve portion (51), the first groove wall (5122) is located on one side of the first protrusion (41), and the second groove wall (5123) is located on the other side of the first protrusion (41).

4. The pump according to claim 3, characterized in that The pump comprises a pump cover (7), the pump cover (7) comprises a first stopper (71), the first stopper (71) is located on a side of the pump cover (7) facing the second rotor, and the other end of the first sleeve portion (51) abuts against the first stopper (71).

5. The pump according to claim 4, characterized in that The pump cover (7) has the outflow channel (72), and the outflow channel (72) is recessed in the side of the pump cover (7) facing the second rotor assembly (3). The pump cover (7) has a second channel (73), and the second channel (73) is recessed in the first stopper (71). The second channel (73) connects the outflow channel (72) and the first channel (6).

6. The pump according to claim 2, characterized in that The first sleeve comprises a second connecting portion (513), the second connecting portion (513) is located at one end of the first sleeve portion (51), the second connecting portion (513) is sleeved on the rotating shaft (4), the rotating shaft (4) has a second groove (42), the second groove (42) is recessed in the outer wall of the rotating shaft (4), the first sleeve comprises a second protrusion (5131), the second protrusion (5131) protrudes from the inner wall of the second connecting portion (513), the second protrusion (5131) is located in the second groove (42), the second groove (42) has a third groove wall and a fourth groove wall, in the circumferential direction of the rotating shaft (4), the third groove wall is located on one side of the second protrusion (5131), and the fourth groove wall is located on the other side of the second protrusion (5131).

7. The pump according to claim 2, characterized in that The first sleeve comprises a third connecting portion (514), the third connecting portion (514) is located at one end of the first sleeve portion (51), the third connecting portion (514) is sleeved on the rotating shaft (4), and the third connecting portion (514) is welded to the rotating shaft (4).

8. The pump according to any one of claims 1 to 7, characterized in that The pump comprises a first accommodating portion (81), the first accommodating portion (81) having the first accommodating cavity (811), the first accommodating portion (81) comprising a bottom wall portion (812) and an extending portion (813), the extending portion (813) extending from the bottom wall portion (812) toward the second rotor assembly (3), and the first sleeve portion (51) passing through the extending portion (813).

9. The pump according to any one of claims 1 to 7, characterized in that: The first rotor assembly comprises an inner rotor (11) and an outer rotor (12); the inner rotor (11) is adapted to the outer rotor (12); and the inner rotor (11) is sleeved in the first sleeve portion (51).

10. The pump according to claim 9, characterized in that The pump comprises a third channel (43), and the third channel (43) penetrates the rotating shaft (4) in the axial direction of the rotating shaft (4). The pump further comprises a pump cover (7), and the pump cover (7) has an inlet channel (75), and the inlet channel (75) penetrates the pump cover (7). The pump cover (7) comprises a first mounting hole (74), and the first mounting hole (74) penetrates the pump cover (7). Part of the rotating shaft (4) is located in the first mounting hole (74), and the third channel (43) is connected to the inlet channel (75).

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