Sealing driving structure and electronic cooling oil pump applying same

Abstract

The utility model discloses a seal driving structure and an electronic cooling oil pump applying the same, the seal driving structure comprises a shell, a rotating assembly and an oil seal, the shell is provided with a plurality of cavities extending along a first direction and through holes communicated with the cavities, the rotating assembly comprises a stator, a rotor and a fastener, the rotor is arranged in the cavity of the shell, and the oil seal is arranged in the cavity of the shell. The stator is arranged between the rotor and the inner side wall of the shell and used for driving the rotor to rotate, the length of the fastener extends in the second direction, the fastener is arranged in a through hole in the top of the shell and fixedly connected with the stator, and the fastener is used for eliminating running rotation of the stator in the second direction and preventing oil liquid from entering the inner space of the sealing driving structure. And the oil seal is arranged at the right end part of the rotor and is hermetically connected with the inner side wall of the shell. The problems that an oil seal bypass in the electronic cooling oil pump leaks oil, an oil seal loses efficacy to cause circumferential wriggling of an internal stator, and the operation reliability of the electronic oil pump is poor are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of electronic oil pump, specifically designs a sealed drive mechanism and the electronic cooling oil pump of application thereof. BACKGROUND

[0002] With the power density of new energy automobile main drive motor improves, the cooling efficiency requirement of main drive motor is also higher and higher, the cooling device of main drive motor has gradually transitioned from traditional water cooling to oil cooling mode, and the oil cooling mode mainly provides circulating power for the internal oil circuit through the electronic cooling oil pump, and the sealing of the oil circuit in the electronic cooling oil pump is particularly important for the operation reliability of the electronic cooling oil pump.

[0003] At present, the oil sealing mode of the electronic cooling oil pump is usually to adopt an oil seal structure in the rotating shaft part and a rubber sealing ring structure in the part connected with the main drive motor, but the sealing after the oil seal bypass and oil seal failure and the relative position of the sealing ring and oil pressure are not further structured, so that various problems such as oil leakage of oil seal bypass, internal stator circumferential creep caused by oil seal failure and the like occur, which finally affects the operation reliability of the electronic cooling oil pump. UTILITY MODEL CONTENTS

[0004] In view of the above deficiencies of the prior art, the utility model provides a sealed drive mechanism and the electronic cooling oil pump of application thereof.

[0005] The utility model aims at realizing the following technical scheme:

[0006] In the first aspect, a sealed drive structure is provided, comprising:

[0007] The shell has a plurality of cavities extending in the first direction and a through hole communicating with the cavities;

[0008] The rotating assembly is used to provide power for oil circulation, and comprises a stator, a rotor and a fastener, the rotor is arranged in the cavity of the shell, the stator is arranged between the rotor and the inner side wall of the shell, and is used to drive the rotor to rotate; the length of the fastener extends in the second direction and is arranged in the through hole at the top of the shell, and the fastener is fixedly connected with the stator, so that the fastener and the stator jointly constitute a structure for eliminating the running of the stator in the second direction and preventing oil from entering the internal space of the sealed drive structure;

[0009] The oil seal is arranged at the right end of the rotor and is sealingly connected with the inner side wall of the shell, and is used to resist the entry of the right oil into the internal space of the sealed drive structure;

[0010] The first direction is a length direction of the shell, and a direction perpendicular to the first direction is a second direction.

[0011] In some embodiments, the fastener bears a shearing force greater than a tangential force along the first direction generated by the contact surface of the stator and the shell.

[0012] In some embodiments, an outside diameter of the oil seal is greater than an inside diameter of the shell.

[0013] In some embodiments, a cut edge groove is arranged on the contact surface of the shell and the oil seal, and a rubber layer of the oil seal is directly bitten into the cut edge groove on the shell.

[0014] In a second aspect, an electronic cooling oil pump is provided, in addition to the sealing and driving structure, comprising:

[0015] A driving plate is arranged at a left end of the shell and used to control the stator to generate a magnetic field and drive the rotor to rotate.

[0016] An oil rotor having a plurality of through holes is arranged at a right end of the rotor and located in a cavity at a right end of the shell, and the oil rotor adjusts the volume of the through holes by the rotation of the rotor to realize the circulation of oil in the electronic oil pump.

[0017] A cavity shell is arranged outside the shell and sealingly connected with the shell and a protective cover of the driving plate, and a plurality of passages for the circulation of oil are arranged in a cavity between the cavity shell and the shell, and an oil inlet hole and an oil outlet hole are arranged in communication with the passages.

[0018] In some embodiments, the oil inlet hole is in communication with the through hole at a lower part of the oil rotor, the first oil outlet hole is in communication with the through hole at an upper part of the oil rotor, and the second oil outlet hole is arranged at a bottom of the cavity shell.

[0019] The sealing and driving structure can effectively prevent oil from penetrating into the rotating assembly through the gap, the fastener arranged in the through hole at the top of the shell is fixedly connected with the stator, the running of the stator in the second direction is eliminated, the problem of the internal stator circumferential peristalsis caused by the failure of the oil seal is effectively solved, the rubber layer of the oil seal is directly bitten into the cut edge groove on the shell in a hot-joint manner, the penetration of oil into the rotating assembly through the gap between the oil seal and the shell is prevented, the bypass failure risk of the oil seal is effectively solved, the oil inlet hole and the oil outlet hole of the whole structure are reasonably designed, the air pressure in the structure can be balanced, the sharp rise of vibration and noise can be effectively prevented, and the cooling efficiency of the electronic cooling oil pump can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0021] Figure 1 is a structural schematic diagram of an electronic cooling oil pump provided in an embodiment of the present application;

[0022] Figure 2 is Figure 1 is a local enlarged view of A in FIG.

[0023] Figure 3 is a structural schematic diagram of a rotating assembly provided in an embodiment of the present application;

[0024] Figure 4 is a structural schematic diagram of a stator provided in an embodiment of the present application.

[0025] Figure 5 is a structural schematic diagram of a fastener provided in an embodiment of the present application.

[0026] Figure 6 is a structural schematic diagram of a rotor provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to better understand the technical solutions of the present application, the embodiments of the present application will be described in detail below with reference to the drawings.

[0028] The present application provides a sealing drive structure, which solves the problem of internal stator circumferential peristalsis caused by oil seal bypass oil leakage and oil seal failure of an electronic cooling oil pump. The present application also provides an electronic cooling oil pump applying the sealing drive structure.

[0029] As shown in FIG. Figure 1 In an embodiment, the sealing drive structure 10 includes a shell 101, a rotating assembly 102 and an oil seal 103. The length direction of the shell 101 is a first direction X, and the direction perpendicular to the first direction is a second direction Y.

[0030] The shell 101 has a plurality of cavities extending along the first direction X and through holes communicating with the cavities; in an embodiment, as shown in FIG. Figure 1As shown, the housing 101 comprises a support plate 1011, a shell 1012 and a pump cover 1013. The shell 1012 has a plurality of cavities and through holes communicating with the cavities, the support plate 1011 is arranged at the left end of the shell 1012 through a sealing ring 1012c, the pump cover 1013 is fixed at the right end of the shell 1012 through a screw 1013a, and the cavities between the support plate 1011, the shell 1012 and the pump cover 1013 are used to place the rotating assembly 102.

[0031] The rotating assembly 102 is used to provide power for oil circulation, and the rotating assembly 102 comprises a stator 1021, a rotor 1022 and a fastener 1023. The rotor 1022 is arranged in the cavity of the housing 101, the stator 1021 is arranged on the outer side wall of the rotor 1022 and is used to drive the rotor 1022 to rotate, and the fastener 1023 extends along the second direction Y and is arranged in the through hole at the top of the housing 101. The fastener 1023 is fixedly connected with the stator 1021, so that the fastener 1023 and the stator 1021 jointly constitute a structure for eliminating the run-out rotation of the stator 1021 in the second direction Y and preventing oil from entering the internal space of the sealing driving structure 10; in an embodiment, as shown, the rotating assembly 102 comprises a stator 1021, a rotor 1022 Figures 1-6 The rotating assembly 102 comprises a stator 1021, a rotor 1022 、The fastener 1023, the first bearing 1022a and the second bearing 1022b, the length of the rotor 1022 extends along the first direction X and is arranged in the cavity of the housing 1012, the first bearing 1022a is arranged at the left end of the rotation axis of the rotor 1022 and is connected with the inner hole of the support plate 1011, the second bearing 1022b is arranged at the right end of the rotation axis of the rotor 1022 and is connected with the inner hole of the housing 1012, the rotor 1022 is completely fixed relative to the housing 1012; the stator 1021 is sleeved on the outer side of the rotor 1022 and is in interference fit with the housing 1012, the fastener 1023 is arranged in the through hole at the top of the housing 1012, the fastener 1023 has a shear resistance greater than the tangential force of the contact surface between the stator 1021 and the housing 1012, the fastener 1023 is matched with the groove 1021a on the stator 1021, when the stator 1021 has a tendency of run-out displacement in the second direction Y, that is, when the tangential force is generated between the contact surface of the stator 1021 and the housing 1012, the fastener 1023 will bear this tangential force instead of the stator 1021 to prevent the run-out rotation of the stator 1021 in the second direction Y; at the same time, if the oil invades into the sealed driving structure 10, the internal gas cannot be discharged and is forced to be compressed in this area, the compressed gas exerts pressure on the invading deposited oil and the fastener 1023 respectively, so that the subsequent right oil no longer invades, the contact friction between the fastener 1023 and the housing increases, which can effectively prevent the outside oil of the housing 1012 from penetrating through the fastener 1023 or the compressed gas from running out, and also avoids the formation of a channel for the deposited oil in the sealed driving structure 10 and the outside oil to cause the loss of oil flow. In an embodiment, as shown in Figure 5 the fastener 1023 adopts a tight screw, and the end 1023a of the tight screw is in the shape of a truncated cone.

[0032] The oil seal 103 is arranged at the right end of the rotor 1022 and is sealingly connected with the inner side wall of the shell 101, and is used to resist the right oil from entering the internal space of the sealed driving structure 10; in an embodiment, as shown in Figures 1-2As shown, the dynamic cooperation between the oil seal 103 and the rotor 1022 is a mature application in the industry, and will not be described in detail. The contact surface between the shell 1012 and the oil seal 103 is provided with a chamfered groove 1012e, the outer diameter of the oil seal 103 is greater than the inner hole diameter of the shell 1012 and is assembled in a hot sleeve manner; after cooperation, the inner hole of the shell 1012 shrinks and extrudes the outer rubber of the oil seal 103, the rubber is forced to deform, and the deformation is resisted by the bottom of the shell 1012 on the left side of the oil seal 103 and is forced to move towards the chamfered groove 1012e on the right side of the oil seal 103. Because the chamfered groove 1012e has a larger opening on the side close to the oil seal 103 and a smaller opening at the bottom, it is beneficial to the extrusion of the deformed oil seal 103 rubber and finally forms an arch inside the chamfered groove 1012e. This arch forms a cutting relationship with the sharp edge of the entrance of the chamfered groove 1012e, which is similar to extrusion, which can effectively resist the penetration of the oil liquid at the extrusion position on the outside, so as to effectively solve the problem of failure due to the penetration of the oil liquid on the right side.

[0033] As shown in the drawings, Figure 1 In an embodiment, an electronic cooling oil pump 20 is provided, in addition to the sealing driving structure 10 described above, it also includes a driving plate 201, an oil pump rotor 202 and a cavity shell 203.

[0034] The driving plate 201 is arranged at the left end of the shell 101 and is used to control the stator 1021 to generate a magnetic field to drive the rotor 1022 to rotate; in an embodiment, the driving plate 201 is arranged in the cavity of the support plate 1011 and its protective cover through its outer protective cover, the stator 1021 is connected with the driving plate 201 through the connecting column 1012d on the support plate 1011, the driving plate 201 controls the stator 1021 to generate a rotating magnetic field by absorbing external electric energy, and the rotor 1022 is attracted by the rotating magnetic field of the stator 1021 to form synchronous rotation.

[0035] The oil pump rotor 202 has a plurality of through holes, the oil pump rotor 202 is arranged at the right end of the rotor 1022 and located in the cavity at the right end of the shell 101, the oil pump rotor 202 adjusts the volume of the internal through hole by the rotation of the rotor 1022 to realize the circulation of the oil liquid in the electronic oil pump; in an embodiment, as shown in Figure 1 and Figure 6 The rotating shaft of the rotor 1022 extends from left to right and forms a cooperation relationship with the inner hole of the oil pump rotor 202, when the rotor 1022 is attracted to rotate by the rotating magnetic field generated by the stator 1021, the right side of the oil pump rotor 202 is driven to rotate synchronously, the middle section area surrounded by the rotor 1022, the oil pump rotor 202 and the shell 1012 is provided with the oil seal 103, which plays a role in resisting the invasion of the high-pressure oil liquid on the right side to the left side.

[0036] The cavity shell 203 is arranged outside the shell 101 and is sealingly connected with the shell 101 and the protective cover of the driving plate 201. The cavity between the cavity shell 203 and the shell 101 has a plurality of passages for the circulation of oil and an oil inlet hole and an oil outlet hole communicating with the passages. The oil inlet hole P communicates with the through hole at the lower part of the oil pump rotor 202, the first oil outlet hole S communicates with the through hole at the upper part of the oil pump rotor 202, and the second oil outlet hole T is arranged at the bottom of the cavity shell 203. In an embodiment, as shown in Figure 1 the left end of the cavity shell 203 is sealingly connected with the right end of the protective cover of the driving plate 201 through the first sealing member 1012a, the protrusion at the right end of the pump cover 1013 is sealingly connected with the recess at the right end of the cavity shell 203 through the second sealing member 1012b, the oil inlet hole P is arranged at the communication part of the cavity shell 203 and the pump cover 1013 and communicates with the through hole at the lower part of the oil pump rotor 202, and the first oil outlet hole S is arranged at the outlet of the passage formed by the pump cover 1013 and the oil pump rotor 202, so as to ensure that the oil pump rotor 202 only absorbs oil from the cooling oil circuit of the main drive motor connected with the oil inlet hole P, and at the same time, the oil discharged from the oil pump rotor 202 cannot flow back to the oil inlet hole P. The second oil outlet hole T is arranged at the bottom of the cavity shell 203, so that the power consumption of the electronic cooling oil pump 20 can be reduced by the self-weight of the oil. In an embodiment, the second oil outlet hole T has a smooth transition structure with a large opening at the upper end and a small opening at the lower end. In the case of constant oil pressure, the passage area gradually decreases and the oil flow rate gradually increases, so that the oil can be smoothly transitioned at a smooth speed, which can prevent the sharp rise of vibration and noise and can also accelerate the speed of the oil entering the main drive motor.

[0037] As shown in Figure 1 an embodiment, a cooling device is provided, which comprises the above-mentioned electronic cooling oil pump 20 and a main drive motor. The main drive motor has a cooling oil circuit, the oil outlet hole of the cooling oil circuit communicates with the oil inlet hole P, and the oil inlet hole of the cooling oil circuit communicates with the second oil outlet hole T. In an embodiment, as shown in Figure 1 the stator 1021 in the shell 1012 is connected with the driving plate 201 through the connecting column 1012d, the driving plate 201 controls the stator 1021 to generate a rotating magnetic field by absorbing external electric energy, the rotor 1022 is synchronously rotated by the attraction of the rotating magnetic field of the stator 1021, and the rotor 1022 forms stable rotational kinetic energy output by the support of the first bearing 1022a and the second bearing 1022b. The output rotational kinetic energy is transmitted to the oil pump rotor 202, the oil pump rotor 202 absorbs cooling oil medium from the oil inlet hole P and discharges cooling oil medium from the first oil outlet hole S by changing the cavity volume of the oil pump rotor 202, the discharged cooling oil medium continuously pushes the cooling oil medium in the cavity formed by the cavity shell 203 and the protective cover of the driving plate 201, and the cooling oil medium is discharged from the second oil outlet hole T, cooled by the oil inlet hole of the cooling oil circuit of the main drive motor, and then returned to the oil inlet hole P through the oil outlet hole of the cooling oil circuit, so as to form a circulation.

[0038] The sealing drive structure 10 provided by the utility model eliminates the phenomenon of running circle rotation of the stator in the second direction Y by setting the fastener 1023 in the through hole on the top of the stator 1021 and the shell 101, the rubber layer of the oil seal 103 is directly bitten into the cutting edge groove 1012e on the shell 101 through the hot jacket mode, the sealing property of the whole sealing drive structure 10 is improved, the oil liquid is effectively prevented from seeping into the gap of the rotating assembly 102 through the gap; meanwhile, the oil inlet hole and the oil outlet hole of the whole structure are arranged at intervals along the second direction Y and are away from the first sealing piece 1012a, the oil pressure in the structure can be balanced, the sharp rise of vibration and noise is effectively prevented, the cooling efficiency of the electronic cooling oil pump 20 can be also improved.

[0039] The above only describes the preferred embodiment of one or more embodiments of the present application, and does not limit one or more embodiments of the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of one or more embodiments of the present application should be included in the protection scope of one or more embodiments of the present application.

Claims

1. A sealed drive structure, characterized by, The application relates to a sealed driving structure of an electronic cooling oil pump. The sealed driving structure comprises a shell, a rotating assembly and an oil seal. The shell has a plurality of cavities extending along a first direction and through holes communicating with the cavities. The rotating assembly is used for providing power for oil circulation and comprises a stator, a rotor and a fastener. The rotor is arranged in the cavity of the shell. The stator is arranged between the rotor and the inner side wall of the shell and used for driving the rotor to rotate.

2. The sealed drive structure of claim 1, wherein, The length of the fastener extends along a second direction and is arranged in the through hole at the top of the shell.

3. The sealed drive structure of claim 1, wherein, The fastener is fixedly connected with the stator, so that the fastener and the stator jointly form a structure for eliminating the run-out rotation of the stator in the second direction and preventing oil from entering the internal space of the sealed driving structure.

4. The sealed drive structure of claim 3, wherein, The oil seal is arranged at the right end of the rotor and sealingly connected with the inner side wall of the shell and used for resisting the right-side oil from entering the internal space of the sealed driving structure.

5. An electrically cooled oil pump characterized by, The first direction is the length direction of the shell, and the second direction is perpendicular to the first direction. The shear force borne by the fastener is greater than the tangential force along the first direction generated by the contact surface of the stator and the shell. The outer diameter of the oil seal is greater than the diameter of the inner side wall of the shell. A cut edge groove is arranged on the contact surface of the shell and the oil seal, and the rubber layer of the oil seal is directly bitten into the cut edge groove on the shell.

6. The electrically cooled oil pump of claim 5, wherein, In addition to the sealed driving structure in claim 1, the application further comprises a driving plate arranged at the left end of the shell and used for controlling the stator to generate a magnetic field and in turn driving the rotor to rotate. An oil rotor having a plurality of through holes is arranged at the right end of the rotor and located in the cavity at the right end of the shell. The oil rotor adjusts the volume of the internal through holes through the rotation of the rotor and in turn realizes the circulation and flow of the oil in the electronic cooling oil pump. A cavity shell is arranged outside the shell and sealingly connected with the shell and the protective cover of the driving plate. The cavity between the cavity shell and the shell has a plurality of passages for oil circulation and oil inlet holes and oil outlet holes communicating with the passages. The oil inlet hole communicates with the through hole at the lower part of the oil rotor. The oil outlet hole has two first oil outlet holes and second oil outlet holes. The first oil outlet hole communicates with the through hole at the upper part of the oil rotor. The second oil outlet hole is arranged at the bottom of the cavity shell.

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