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 third containing cavity. The pump comprises a circuit board, the circuit board is arranged in the third containing cavity, the pump comprises a flow inlet channel and a first channel, the first channel is provided with a first port, the first port is communicated with the flow inlet channel, the circuit board is provided with a base plate, the first channel is provided with a second port, and the second port is communicated with the first port. The second port is located on the side, away from the second rotor assembly, of the base plate, the second port is communicated with the third containing cavity, and the third containing cavity is communicated with the second containing cavity. The heat dissipation efficiency of the circuit board 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 Figure 7 , fluid driving device 100a 、 Including the first cavity 80 、 、Second cavity 90 、 , the first rotor assembly 1 、 Set in the first cavity 80 、 , stator assembly, second rotor assembly 3 、 And the circuit board assembly 4 、 Set in the second cavity 90 、 , the first cavity 80 、 With the second cavity 90 、 Connectivity, axis 5 、 Including the second channel 20 、 , second channel 20 、 Set to through axis 5 、 The first end face and the axis 5 、 The second end surface of the fluid drive device 100 、 With inlet channel 13 、 , second channel 20 、 With inlet channel 13 、 Connected through the second channel 20 、 The inlet channel 13 、 The working medium can flow into the second chamber 90 、 and located in the second cavity 90 、 Circuit board assembly 4 、 At least part of the contact with the circuit board assembly 4 、 Cool down.

[0004] Fluid driving device 100a 、 Also includes a first channel 10 、 , first channel 10 、 Through the bottom wall 801 、 The upper and lower surfaces of the first channel 10 、 Can communicate with the first cavity 80 、 and the second cavity 90 、 , through the first channel 10 、 The second cavity 90 、The working medium in the second chamber can leave 90 、 , and axis 5 、 Located on the circuit board assembly 4 、 Towards the second rotor assembly 3 、 On one side, the working medium is on the circuit board assembly 4 、 The second rotor assembly 3 is away from 、 The fluidity of one side is lower, and the working medium is in the circuit board assembly 4 、 Towards the second rotor assembly 3 、 Fluidity and working medium in circuit board assembly 4 、 The second rotor assembly 3 is away from 、 The difference in fluidity is large, and the working medium has a great influence on the circuit board assembly 4 、 The heat dissipation efficiency needs to be improved. [Summary of the invention]

[0005] In order to solve the above problems, a pump is provided, 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 third accommodating chamber, the pump comprising a circuit board, the circuit board being arranged in the third accommodating chamber, the pump comprising an inlet channel and a first channel, the first channel having a first port, the first port being communicated with the inlet channel, the circuit board having a substrate, the first channel having a second port, the second port being located on a side of the substrate away from the second rotor assembly, the second port being communicated with the third accommodating chamber, and the third accommodating chamber being communicated with the second accommodating chamber.

[0006] Such a pump includes an inlet channel and a first channel, the first port of the first channel is connected to the inlet channel, the circuit board has a substrate, the second port of the first channel is located on the side of the substrate facing away from the second rotor assembly, the second port is connected to the third accommodating chamber, and the third accommodating chamber is connected to the second accommodating chamber. When the pump is working, the working medium enters the third accommodating chamber from the first channel and then enters the second accommodating chamber. After that, the working medium flows from the side of the substrate facing away from the second rotor assembly through the side of the substrate facing the second rotor assembly, and then flows into the second accommodating chamber, thereby reducing the difference between the fluidity of the working medium on the substrate facing away from the second rotor assembly and the fluidity of the working medium on the substrate facing the second rotor assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a stereogram of a pump in the present invention;

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

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

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

[0011] Figure 5 yes Figure 3 A partial enlarged view of part B;

[0012] Figure 6 is a top view of the partition in the present invention;

[0013] Figure 7 It is a structural diagram of the background technology.

[0014] Reference numerals:

[0015] Inner rotor 111, outer rotor 112, stator assembly 12, second rotor assembly 13, rotating shaft 14,

[0016] The first accommodating chamber 21, the second accommodating chamber 22, the third accommodating chamber 23,

[0017] base plate 31,

[0018] Pump cover 4, inlet channel 41, outlet channel 42,

[0019] First channel 5,

[0020] Pump housing 6, bottom 611, first groove 6111, side 612, second sub-channel 6121, third groove 6122, second channel 6123,

[0021] End cover 7, main body 71, first protrusion 72, first sub-channel 721, second port 722, second groove 723,

[0022] first tube 8, first port 81,

[0023] Partition plate 9 , first through hole 91 , second through hole 92 . DETAILED DESCRIPTION

[0024] The technical solution of the specific implementation method is described below in conjunction with the accompanying drawings.

[0025] 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.

[0026] See also Figure 1-Figure 3The pump includes a pump housing 6, a first rotor assembly, a stator assembly 12, a second rotor assembly 13, a rotating shaft 14 and a circuit board. The pump has a first accommodating chamber 21 and a second accommodating chamber 22. The first rotor assembly is arranged in the first accommodating chamber 21, and the stator assembly 12 and the second rotor assembly 13 are arranged in the second accommodating chamber 22. The stator assembly 12 is arranged around the outer periphery of the second rotor assembly 13. The stator assembly 12 includes a stator core and a coil. When the pump is working, the circuit board controls the current passing through the coil to change according to a predetermined rule, thereby controlling the stator assembly 12 to generate a changing excitation magnetic field. The second rotor assembly 13 rotates under the action of the excitation magnetic field, and the second rotor assembly 13 can drive the first rotor assembly to rotate.

[0027] See also Figure 2-Figure 3 The first rotor assembly includes an inner rotor 111 and an outer rotor 112. The inner rotor 111 includes a plurality of outer teeth, and the outer rotor 112 includes a plurality of inner teeth. A volume cavity is provided between the outer teeth of the inner rotor 111 and the inner teeth of the outer rotor 112. An eccentricity exists between the inner rotor 111 and the outer rotor 112. When the inner rotor 111 rotates, at least part of the outer teeth of the inner rotor 111 mesh with at least part of the inner teeth of the outer rotor 112, so that the inner rotor 111 can drive the outer rotor 112 to rotate.

[0028] refer to Figure 2 The pump also includes an inlet channel 41 and an outlet channel 42. The inlet channel 41 is used for the inflow of the working medium, and the outlet channel 42 is used for the outflow of the working medium. The working medium can enter the volume cavity between the inner rotor 111 and the outer rotor 112 through the inlet channel 41, and the working medium can leave the volume cavity through the outlet channel 42. When the first rotor assembly rotates, the volume of the volume cavity changes, so that the working medium is pressed out to the outlet channel 42 to generate flow power.

[0029] refer to Figure 3-Figure 5 The pump includes a third accommodating chamber 23, a circuit board is arranged in the third accommodating chamber 23, the pump includes a first channel 5, the first channel 5 has a first port 81, the first port 81 is communicated with the inlet channel 41, the circuit board has a substrate 31, the first channel 5 has a second port 722, the second port 722 is located on a side of the substrate 31 away from the second rotor assembly 13, the second port 722 is communicated with the third accommodating chamber 23, and the third accommodating chamber 23 is communicated with the second accommodating chamber 22.

[0030] Such a pump includes an inlet channel 41 and a first channel 5, wherein the first port 81 of the first channel 5 is communicated with the inlet channel 41, the circuit board has a substrate 31, the second port 722 of the first channel 5 is located on the side of the substrate 31 facing away from the second rotor assembly 13, the second port 722 is communicated with the third accommodating chamber 23, and the third accommodating chamber 23 is communicated with the second accommodating chamber 22. When the pump is working, during the process in which the working medium enters the third accommodating chamber 23 from the first channel 5 and then enters the second accommodating chamber 22, the working medium flows from the side of the substrate 31 facing away from the second rotor assembly 13 through the side of the substrate 31 facing the second rotor assembly 13, and then flows into the second accommodating chamber 22, thereby improving the fluidity of the working medium on the side of the substrate 31 facing the second rotor assembly 13, and reducing the difference between the fluidity of the working medium on the substrate 31 facing away from the second rotor assembly 13 and the fluidity of the working medium on the substrate 31 facing the second rotor assembly 13.

[0031] refer to Figure 3-Figure 5 The pump includes a pump casing 6 and an end cover 7. The pump casing 6 and the end cover 7 are sealed together. The pump casing 6 is sleeved on the end cover 7. A sealing ring is arranged between the pump casing 6 and the end cover 7. The end cover 7 includes a main body 71 and a first protrusion 72. The first protrusion 72 protrudes from the main body 71. The first protrusion 72 is located on the side of the substrate 31 away from the first rotor assembly. The first protrusion 72 has a first sub-channel 721. One port of the first sub-channel 721 is a second port 722. The second port 722 is located on the inner wall of the first protrusion 72.

[0032] refer to Figure 3-Figure 5 The pump includes a first tube 8, one end of the first tube 8 is a first port 81, the first tube 8 abuts against the first protrusion 72, the other end of the first tube 8 is at least partially opposite to the other end of the first sub-channel 721, the other end of the first tube 8 is connected to the first sub-channel 721, and the working medium can flow from the first tube 8 into the first sub-channel 721 and then flow out through the second port 722 to cool the circuit board.

[0033] refer to Figure 3-Figure 5The pump housing 6 includes a first accommodating portion, which includes a bottom 611 and a side portion 612. The bottom 611 protrudes from the inner wall of the side portion 612, and the side portion 612 has a second sub-channel 6121. The bottom 611 has a first groove 6111, which is recessed in the wall portion of the bottom 611 facing the first rotor assembly. The second sub-channel 6121 extends from the first groove 6111, and the first groove 6111 connects the second sub-channel 6121 and the inlet channel 41. The first tube 8 abuts against the side portion 612, and the first port 81 is at least partially opposite to the port of the second sub-channel 6121 away from the first groove 6111. The first port 81 is connected to the second sub-channel 6121. The working medium can flow from the first groove 6111 into the second sub-channel 6121 and then enter the first tube 8. The first tube 8 abuts against the side portion 612, and the first tube 8 is supported between the side portion 612 and the first protrusion for easy installation.

[0034] Furthermore, the rotating shaft 14 does not have a flow hole, and the working medium does not flow through the rotating shaft, thereby reducing the friction between the fluid and the rotating shaft 14 and improving the working efficiency of the pump.

[0035] refer to Figure 3-Figure 5 The first protrusion 72 has a second groove 723, and the second groove 723 is recessed in the wall of the first protrusion 72 facing the second rotor assembly 13. The other end of the first tube 8 is located in the second groove 723, and the other end of the first tube 8 is adapted to the second groove 723. For example, the second groove 723 is circular, and the other end of the first tube 8 is interference fit with the second groove 723. The other port of the first sub-channel 721 is located at the bottom wall corresponding to the second groove 723, and the first sub-channel 721 is L-shaped, etc.

[0036] refer to Figure 3-Figure 5 The side portion 612 has a third groove 6122, and the third groove 6122 is recessed in the wall portion of the side portion 612 away from the first rotor assembly. One end portion of the first tube 8 is located in the third groove 6122, and one end portion of the first tube 8 is adapted to the third groove 6122. The port of the second sub-channel 6121 away from the first groove 6111 is located at the bottom wall portion corresponding to the third groove 6122. During assembly, the first tube 8 can be first installed in the third groove 6122, and then the end cover 7 can be installed into one end of the pump casing 6, so that the other end portion of the first tube 8 is located in the second groove 723, thereby installing and fixing the first tube 8.

[0037] Of course, the end of the first tube 8 may also directly extend into the side of the base plate 31 away from the second rotor assembly 13 , which will not be described in detail here.

[0038] refer to Figure 3Since there is a gap between the coils, the first tube 8 can pass through the gap between the coils. Of course, the first tube 8 can also be located outside the stator assembly 12, for example, fixed to the inner circumferential wall of the pump housing 6 or located inside the pump housing 6, which will not be elaborated here.

[0039] Of course, the first channel 5 can also be directly formed on the pump housing 6, which will not be described in detail here.

[0040] Of course, there may be multiple first tubes 8, which will not be elaborated here.

[0041] refer to Figure 1-Figure 3 The pump includes a pump cover 4, which is located at one end of a pump housing 6, and an end cover 7 is located at the other end of the pump housing 6. The pump cover 4 has an inlet channel 41 and an outlet channel 42. The inlet channel 41 runs through the pump cover 4, and the outlet channel 42 is recessed on the side of the pump cover 4 facing the first rotor assembly.

[0042] refer to Figure 3 and Figure 6 The pump includes a partition 9, a second accommodating chamber 22 is located on one side of the partition 9, and a third accommodating chamber 23 is located on the other side of the partition 9. The partition 9 has a first through hole 91, and the first through hole 91 passes through the partition 9. The first through hole 91 connects the second accommodating chamber 22 and the third accommodating chamber 23, so that the working medium can flow into the third accommodating chamber 23 better, reduce backflow, and improve the heat dissipation effect of the circuit board.

[0043] refer to Figure 3 and Figure 6 The number of the first through holes 91 is the same as the number of the coils. The first through holes 91 are equidistantly arranged in the circumferential direction of the partition 9. It is defined that the surface of the wall through the partition 9 facing the second rotor assembly 13 is the first surface, and the projection of a first through hole 91 on the first surface is located inside the projection of one of the coils on the first surface, that is, each coil corresponds to a first through hole 91, thereby improving the heat dissipation effect of the coil.

[0044] refer to Figure 3 and Figure 6 The partition plate 9 has a second through hole 92, a portion of the first tube 8 is located in the through hole, and the first tube 8 is adapted to the through hole.

[0045] Of course, the partition plate 9 may not be provided, which will not be described in detail here.

[0046] refer to Figure 3 The bottom 611 has a second channel 6123 , and in the thickness direction of the bottom 611 , the second channel 6123 penetrates the bottom 611 , and the second channel 6123 connects the second accommodating cavity 22 and the outflow channel 42 .

[0047] When the pump is working, one of the flow paths of the working medium is: outflow channel 42 → first groove 6111 → second sub-channel 6121 → first tube 8 → first sub-channel 721 → third accommodating chamber 23 → second accommodating chamber 22 → second channel 6123 → inlet channel 41 .

[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 (12) and a second rotor assembly (13), the pump having a first accommodating chamber (21) and a second accommodating chamber (22), the first rotor assembly being arranged in the first accommodating chamber (21), the stator assembly (12) and the second rotor assembly (13) being arranged in the second accommodating chamber (22), characterized in that: The pump comprises a third accommodating chamber (23), the pump comprises a circuit board, the circuit board is arranged in the third accommodating chamber (23), the pump comprises an inlet channel (41) and a first channel (5), the first channel (5) has a first port (81), the first port (81) is communicated with the inlet channel (41), the circuit board has a substrate (31), the first channel (5) has a second port (722), the second port (722) is located on a side of the substrate (31) away from the second rotor assembly (13), the second port (722) is communicated with the third accommodating chamber (23), and the third accommodating chamber (23) is communicated with the second accommodating chamber (22).

2. The pump according to claim 1, characterized in that The pump comprises a pump housing (6) and an end cover (7), wherein the pump housing (6) is sealed with the end cover (7), and the end cover (7) comprises a first protrusion (72), wherein the first protrusion (72) is located on a side of the base plate (31) away from the first rotor assembly, and the first protrusion (72) has a first sub-channel (721), and one port of the first sub-channel (721) is the second port (722).

3. The pump according to claim 2, characterized in that The pump comprises a first tube (8), one end of the first tube (8) being the first port (81), the first tube (8) being in contact with the first protrusion (72), the other end of the first tube (8) being at least partially opposite to the other end of the first sub-channel (721), and the other end of the first tube (8) being in communication with the first sub-channel (721).

4. The pump according to claim 3, characterized in that The pump housing (6) comprises a first accommodating portion, the first accommodating portion comprises a bottom portion (611) and a side portion (612), the bottom portion (611) protrudes from the inner wall of the side portion (612), the side portion (612) has a second sub-channel (6121), the bottom portion (611) has a first groove (6111), the first groove (6111) is recessed in the wall portion of the bottom portion (611) facing the first rotor assembly, the first groove (6111) connects the second sub-channel (6121) and the inlet channel (41), the first tube (8) abuts against the side portion (612), the first port (81) is at least partially opposite to a port of the second sub-channel (6121) away from the first groove (6111), and the first port (81) is connected to the second sub-channel (6121).

5. The pump according to claim 4, characterized in that The first protrusion (72) has a second groove (723), and the second groove (723) is recessed in the wall of the first protrusion (72) facing the second rotor assembly (13). The other end of the first tube (8) is located in the second groove (723), and the other end of the first tube (8) is adapted to the second groove (723). The other port of the first sub-channel (721) is located at the bottom wall corresponding to the second groove (723).

6. The pump according to claim 5, characterized in that The side portion (612) has a third groove (6122), and the third groove (6122) is recessed in the wall portion of the side portion (612) facing away from the first rotor assembly. One end of the first tube (8) is located in the third groove (6122), and one end of the first tube (8) is adapted to the third groove (6122). The port of the second sub-channel (6121) away from the first groove (6111) is located at the bottom wall portion corresponding to the third groove (6122).

7. The pump according to any one of claims 1 to 6, characterized in that: The pump comprises a partition (9), the second accommodating chamber (22) is located on one side of the partition (9), the third accommodating chamber (23) is located on the other side of the partition (9), the partition (9) has a first through hole (91), the first through hole (91) passes through the partition (9), and the first through hole (91) connects the second accommodating chamber (22) and the third accommodating chamber (23).

8. The pump according to claim 7, characterized in that The number of the first through holes (91) is the same as the number of the coils. The first through holes (91) are arranged equidistantly in the circumferential direction of the partition (9). It is defined that the surface of the wall through the partition (9) facing the second rotor assembly (13) is the first surface, wherein the projection of a first through hole (91) on the first surface is located inside the projection of a coil on the first surface.

9. The pump according to claim 7, characterized in that The partition plate (9) has a second through hole (92), a portion of the first tube (8) is located in the through hole, and the first tube (8) is adapted to the through hole.

10. The pump according to any one of claims 4 to 6, characterized in that: The bottom (611) has a second channel (6123), and the second channel (6123) runs through the bottom (611) in the thickness direction of the bottom (611). The pump has an outflow channel (42), and the second channel (6123) connects the second accommodating chamber (22) and the outflow channel (42).

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