Electronic oil pump with immersed cooling driver

Abstract

The utility model relates to an electronic oil pump with an immersed cooling driver. The electronic oil pump comprises a shell, a PCBA (printed circuit board assembly), a driving part and an inner and outer rotor assembly, wherein the PCBA and the driving part are arranged in the shell; the inner and outer rotor assembly is connected with an output shaft of the driving part; a conveying channel is formed in the output shaft, and a conveying channel oil inlet, an oil suction port and an oil discharge port are formed in the shell. The brushless direct current motor drives the inner rotor assembly and the outer rotor assembly to operate to generate negative pressure, oil is sucked in through the oil inlet and the oil suction port of the conveying channel under the action of the negative pressure, and the oil sucked in through the oil inlet of the conveying channel is conveyed into the controller shell through the conveying channel so that the brushless direct current motor and the PCBA can be cooled. Oil sucked through the oil suction port enters the pump shell to cool the brushless direct current motor, then oil in the controller shell and the pump shell flows back to the oil discharge port to be discharged, the PCBA and the brushless direct current motor can be fully cooled through the oil, and the heat dissipation performance is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electronic oil pumps, and in particular relates to an electronic oil pump with an immersion-type cooling driver. Background Art

[0002] BLDC motor is a brushless DC motor, which is generally composed of a rotor made of permanent magnet material and a stator with coil winding. The brushless DC motor overcomes the inherent defects of the brushed DC motor and replaces the mechanical commutator with an electronic commutator. Therefore, the brushless DC motor has the characteristics of good speed regulation performance of DC motors and has the advantages of simple structure, no commutation sparks, reliable operation and easy maintenance of AC motors.

[0003] The electronic oil pump mainly includes a mid-section housing, a PCBA (printed circuit board, which serves as a controller) located inside the mid-section housing, a motor and inner and outer rotors, and a controller cover and pump inlet end cover respectively connected to the two ends of the mid-section housing. It generally also has a heat dissipation structure. In the prior art, the heat dissipation structure of the electronic oil pump is a heat dissipation fin installed on the controller cover and in contact with the PCBA, which dissipates heat from the controller through air cooling. However, using this heat dissipation structure during use still has problems. Specifically, the motor heat dissipation efficiency is low. During use, the heat energy generated by the motor will be transferred to the PCBA, causing the temperature of the PCBA close to the motor to be always higher. The high temperature can easily damage the electrical components on the PCBA or shorten its service life, making it prone to failure. Utility Model Content

[0004] The purpose of this utility model is to provide an electronic oil pump with immersion cooling of the driver in order to solve the above problems. It is intended to solve the technical problems in the prior art that the heat dissipation efficiency of the motor and PCBA is low due to the use of heat dissipation fins to cool the controller, and the high temperature can easily damage the electrical components on the PCBA or shorten the service life, and is prone to malfunction.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] An electronic oil pump with immersion cooling of a driver comprises a housing, a PCBA disposed inside the housing, a driver, and an inner and outer rotor assembly connected to an output shaft of the driver;

[0007] A delivery channel is provided inside the output shaft, and an oil inlet, an oil suction port, and an oil discharge port of the delivery channel are provided on the outer shell;

[0008] The inner and outer rotor assemblies are used to change the air pressure inside the housing and to suck in and discharge oil during operation and rotation;

[0009] The oil inlet of the delivery channel, the delivery channel and the oil suction port are used to supply oil to flow in for cooling the driving component and the PCBA.

[0010] As a further optimization solution of the present invention, the PCBA is provided with an insulating oil-resistant layer.

[0011] As a further optimization solution of the present invention, the insulating oil-resistant layer is any one or more of a vacuum coating layer and a paint layer.

[0012] As a further optimization solution of the present invention, the housing includes a controller housing, a pump housing, and a pump cover connected in sequence, the PCBA is arranged inside the controller housing, the drive component, and the inner and outer rotor assemblies are all arranged inside the pump housing, and the oil inlet, oil suction port, and oil discharge port of the delivery channel are all located on the side of the drive component away from the PCBA;

[0013] The oil sucked into the oil inlet of the delivery channel is delivered to the interior of the controller housing through the delivery channel.

[0014] As a further optimization solution of the present invention, the housing also includes a controller cover connected to the controller housing, a first mounting groove is provided on the controller cover, and a first sealing ring is provided inside the first mounting groove for sealing the gap between the controller cover and the controller housing.

[0015] As a further optimization solution of the present invention, the driving component is a brushless DC motor, which includes a motor stator and a motor rotor. The output shaft passes through the middle of the motor rotor and is fixedly connected to the motor rotor.

[0016] As a further optimized solution of the present invention, the inner and outer rotor assembly includes a pump outer rotor and a pump inner rotor that cooperate with each other.

[0017] As a further optimization solution of the present invention, a second installation groove is provided on the outer wall of the controller housing, and a second sealing ring for sealing the gap between the controller housing and the pump housing is provided in the second installation groove.

[0018] As a further optimization solution of the present invention, a third mounting groove is provided on the outer wall of the pump housing, and an oil outlet sealing ring is provided in the second mounting groove.

[0019] As a further optimization solution of the present invention, a fourth mounting groove is provided on the outer wall of the pump cover, and an oil inlet sealing ring is provided in the fourth mounting groove.

[0020] The beneficial effects of the present invention are:

[0021] 1) The utility model generates negative pressure by driving the inner and outer rotor assemblies through a brushless DC motor. Under the action of the negative pressure, oil is sucked in through the oil inlet and the oil suction port of the delivery channel. The oil sucked in through the oil inlet of the delivery channel is transported to the interior of the controller housing through the delivery channel to cool the brushless DC motor and the PCBA. The oil sucked in through the oil suction port enters the interior of the pump housing to cool the brushless DC motor. The oil inside the controller housing and the pump housing then flows back to the oil drain port for discharge. The PCBA and the brushless DC motor can be fully cooled by the oil, thereby improving the heat dissipation performance.

[0022] 2) The utility model provides an insulating oil-resistant layer on the PCBA, so that the PCBA has a complete oil-immersion function. The heat exchange efficiency between the PCBA and the oil is high, and the temperature of the PCBA can be reduced quickly. The overall structure is simple and easy to produce and process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0024] Figure 2 It is an exploded view of the overall structure of the utility model.

[0025] Figure 3 It is a partial structural diagram of the utility model.

[0026] Figure 4 It is a structural schematic diagram of the pump cover of the present utility model.

[0027] Figure 5 It is a schematic diagram of the oil flow path of the utility model.

[0028] In the figure: 1. Controller bolts; 2. Controller cover; 3. First sealing ring; 4. PCBA; 5. Controller housing; 6. Second sealing ring; 7. Motor stator; 8. Motor rotor; 9. Pump housing; 91. Oil drain port; 10. Oil outlet sealing ring; 11. Pump outer rotor; 12. Pump inner rotor; 13. Pump cover; 131. Oil inlet of delivery channel; 132. Oil suction port; 14. Pump body bolts; 15. Oil inlet sealing ring. DETAILED DESCRIPTION

[0029] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0030] like Figure 1-5As shown, an electronic oil pump with immersion cooling of the driver includes a housing, a PCBA 4 arranged inside the housing, a driver, and an inner and outer rotor assembly connected to the output shaft of the driver;

[0031] The output shaft is provided with a delivery channel, and the housing is provided with an oil inlet 131, an oil suction port 132, and an oil discharge port 91 of the delivery channel;

[0032] The inner and outer rotor assemblies are used to change the air pressure inside the housing and to suck in and discharge oil during operation and rotation;

[0033] The oil inlet 131 of the delivery channel and the oil suction port 132 are used to supply oil to cool the driving components and the PCBA 4;

[0034] The oil drain port 91 is used for oil to flow out.

[0035] Preferably, the PCBA 4 has an insulating oil-resistant layer.

[0036] Preferably, the insulating and oil-resistant layer is any one or more of a vacuum coating layer and a coating layer.

[0037] In this embodiment, the coating layer is a conformal coating. Conformal coating is a coating used to protect circuit boards and related devices from environmental corrosion. After curing, it forms a transparent protective film, namely the conformal coating (coating layer). The coating layer (insulating and oil-resistant layer) enables the PCBA 4 to have a complete oil-proof function. In other embodiments, the coating layer can also be obtained by curing other insulating and oil-resistant coatings into a film.

[0038] Vacuum coating is a conventional technology that heats metal or non-metal materials under high vacuum conditions to evaporate and condense on the surface of the plated object (metal, semiconductor or insulator) to form a thin film.

[0039] In this embodiment, the vacuum coating layer (insulating oil-resistant layer) can also enable the PCBA 4 to have a complete oil-proof function.

[0040] In this embodiment, the housing includes a controller housing 5, a pump housing 9, and a pump cover 13, which are connected in sequence. The PCBA 4 is disposed within the controller housing 5. The drive components and the inner and outer rotor assemblies are all disposed within the pump housing 9. The oil inlet 131, the oil suction port 132, and the oil discharge port 91 of the delivery channel are all located on the side of the drive component away from the PCBA 4.

[0041] like Figure 1 、 4 -5, the oil inlet 131 and the oil suction port 132 of the delivery channel are both opened on the pump cover 13, and the oil discharge port 91 is opened on the pump housing 9;

[0042] The oil sucked into the oil inlet 131 of the delivery channel is delivered to the interior of the controller housing 5 through the delivery channel.

[0043] It should be noted that, in this embodiment, the pump housing 9 and the pump cover 13 are connected and fixed by a plurality of pump body bolts 14 .

[0044] Preferably, the housing also includes a controller cover 2 connected to the controller housing 5, and a first mounting groove is provided on the controller cover 2. A first sealing ring 3 for sealing the gap between the controller cover 2 and the controller housing 5 is provided inside the first mounting groove. The controller housing 5 is sealed by the controller cover 2, and the first sealing ring 3 serves to increase the sealing between the controller housing 5 and the pump housing 9.

[0045] It should be noted that, in this embodiment, the controller cover 2 and the controller housing 5 are connected and fixed by a plurality of controller bolts 1 .

[0046] In this embodiment, the driving component is a brushless DC motor, which includes a motor stator 7 and a motor rotor 8 . The output shaft passes through the middle of the motor rotor 8 and is fixedly connected to the motor rotor 8 .

[0047] It should be noted that, in this embodiment, the motor stator 7 and the motor rotor 8 form a brushless DC motor, which is a conventional technology and will not be described in detail here.

[0048] In this embodiment, the inner and outer rotor assembly includes a pump outer rotor 11 and a pump inner rotor 12 that cooperate with each other.

[0049] It should be noted that, in this embodiment, the pump outer rotor 11 and the pump inner rotor 12 are installed in cooperation with each other in accordance with conventional technology;

[0050] The output shaft of the brushless DC motor drives the pump outer rotor 11 and the pump inner rotor 12 to rotate. The rotation of the pump outer rotor 11 and the pump inner rotor 12 will form a negative pressure inside the controller housing 5 and the pump housing 9. Under the action of this negative pressure, oil is sucked in through the oil inlet 131 of the delivery channel and delivered to the interior of the controller housing 5 through the delivery channel. The oil can cool and dissipate heat inside the brushless DC motor. The oil contacts the PCBA 4 with an insulating and oil-resistant layer, thereby cooling and dissipating heat from the PCBA 4 with the insulating and oil-resistant layer. The oil sucked in through the oil suction port 132 can cool and dissipate heat outside the brushless DC motor. The brushless DC motor is immersed in the oil and is in full contact with the oil, thereby improving the heat dissipation effect. Then, the rotation of the pump outer rotor 11 and the pump inner rotor 12 causes the oil inside the controller housing 5 and the pump housing 9 to flow back to the oil discharge port 91 and be discharged through the oil discharge port 91, thereby forming a circulation path for the oil.

[0051] Preferably, a second mounting groove is provided on the outer wall of the controller housing 5, and a second sealing ring 6 is provided in the second mounting groove for sealing the gap between the controller housing 5 and the pump housing 9. The second sealing ring 6 serves to increase the sealing between the controller housing 5 and the pump housing 9.

[0052] Preferably, a third mounting groove is provided on the outer wall of the pump housing 9 , and an oil outlet sealing ring 10 is provided in the second mounting groove, and the oil outlet sealing ring 10 serves to increase the sealing performance.

[0053] Preferably, a fourth mounting groove is provided on the outer wall of the pump cover 13 , and an oil inlet sealing ring 15 is provided in the fourth mounting groove, and the oil inlet sealing ring 15 serves to increase the sealing performance.

[0054] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. An electronic oil pump for driver immersion cooling, characterized in that: It comprises a housing, a PCBA (4) arranged inside the housing, a driving component, and an inner and outer rotor assembly connected to an output shaft of the driving component; A delivery channel is provided inside the output shaft, and an oil inlet (131), an oil suction port (132), and an oil discharge port (91) of the delivery channel are provided on the outer shell; The inner and outer rotor assemblies are used to change the air pressure inside the housing and to inhale and discharge oil during operation and rotation; The delivery channel oil inlet (131), the delivery channel and the oil suction port (132) are used to supply oil to flow in for cooling the drive component and the PCBA (4).

2. The electronic oil pump for driver immersion cooling according to claim 1, characterized in that: The PCBA (4) has an insulating oil-resistant layer.

3. The electronic oil pump for driver immersion cooling according to claim 2, characterized in that: The insulating oil-resistant layer is any one or more of a vacuum coating layer and a coating layer.

4. The electronic oil pump for driver immersion cooling according to claim 1, characterized in that: The housing comprises a controller housing (5), a pump housing (9), and a pump cover (13) which are connected in sequence; the PCBA (4) is arranged inside the controller housing (5); the driving component and the inner and outer rotor assemblies are all arranged inside the pump housing (9); and the oil inlet (131), the oil suction port (132), and the oil discharge port (91) of the delivery channel are all located on a side of the driving component away from the PCBA (4); The oil sucked into the oil inlet (131) of the delivery channel is delivered to the inside of the controller housing (5) through the delivery channel.

5. The electronic oil pump for driver immersion cooling according to claim 4, characterized in that: The housing further comprises a controller cover (2) connected to the controller housing (5); a first mounting groove is provided on the controller cover (2); a first sealing ring (3) is provided inside the first mounting groove for sealing the gap between the controller cover (2) and the controller housing (5).

6. The electronic oil pump for driver immersion cooling according to claim 1, characterized in that: The driving component is a brushless DC motor, which comprises a motor stator (7) and a motor rotor (8), and the output shaft passes through the middle of the motor rotor (8) and is fixedly connected to the motor rotor (8).

7. The electronic oil pump for driver immersion cooling according to claim 1, characterized in that: The inner and outer rotor assembly comprises a pump outer rotor (11) and a pump inner rotor (12) which cooperate with each other.

8. The electronic oil pump for driver immersion cooling according to claim 4, characterized in that: A second installation groove is provided on the outer wall of the controller housing (5), and a second sealing ring (6) for sealing the gap between the controller housing (5) and the pump housing (9) is provided in the second installation groove.

9. The electronic oil pump for driver immersion cooling according to claim 4, characterized in that: A third installation groove is provided on the outer wall of the pump housing (9), and an oil outlet sealing ring (10) is provided in the third installation groove.

10. The electronic oil pump for driver immersion cooling according to claim 4, characterized in that: A fourth installation groove is provided on the outer wall of the pump cover (13), and an oil inlet sealing ring (15) is provided in the fourth installation groove.

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