阅读说明：本技术 一种电机和控制器包含冷却油路的电动油泵总成 (Motor and controller contain electric oil pump assembly of cooling oil circuit ) 是由 祝强华 赵炳雄 秦杰 于 2020-05-22 设计创作，主要内容包括：本发明公开了一种电机和控制器包含冷却油路的电动油泵总成,由机械油泵、电机和控制器组成的电动油泵,所述机械油泵包括转子组、进油口和出油口,所述电机包括定子组件、转子组件和电机外壳,所述电动油泵还包括,第一冷却油路,所述第一冷却油路包括第一油道和第二油道；第二冷却油路,所述第二冷却油路包括第三油道、第四油道和第五油道；本发明不仅降低了整个系统的成本,还减小了油封和轴之间的摩擦功损耗,提高了电动油泵的机械效率,同时也提高了电动油泵的运行寿命。(The invention discloses an electric oil pump assembly with a motor and a controller containing cooling oil ways, which comprises a mechanical oil pump, the motor and the controller, wherein the mechanical oil pump comprises a rotor set, an oil inlet and an oil outlet; a second cooling oil path including a third oil path, a fourth oil path, and a fifth oil path; the invention not only reduces the cost of the whole system, but also reduces the friction power loss between the oil seal and the shaft, improves the mechanical efficiency of the electric oil pump, and simultaneously prolongs the service life of the electric oil pump.)

1. An electric oil pump assembly of motor and controller containing cooling oil circuit, the electric oil pump of constituteing by mechanical oil pump (100), motor (200) and controller (300), mechanical oil pump (100) includes rotor assembly (110), oil inlet (120) and oil outlet (130), motor (200) includes stator module (210), rotor subassembly (220) and motor housing (230), controller (300) includes controller casing (310), controller casing (310) has bottom end face (311), its characterized in that: the electric oil pump further includes a motor that drives the motor,

the first cooling oil path (A) comprises a first oil path and a second oil path, the first oil path is formed by a gap between a driving shaft (221) arranged at the center of the rotor assembly (220) and a shaft hole (232) formed in the motor shell (230), and the second oil path is formed by a gap in a first rolling bearing (222) arranged at one end of the driving shaft (221);

the second cooling oil path (B) comprises a third oil path, a fourth oil path and a fifth oil path, the third oil path is formed by a plurality of outer oil grooves (215) formed in the outer surface of the stator assembly (210), the fourth oil path is formed by a gap between a bottom end surface (311) and an upper end surface (211) of the stator assembly (210), and the fifth oil path is formed by an air gap between the stator assembly (210) and the rotor assembly (220), a plurality of inner oil grooves (214) formed in the stator assembly (210) and oil grooves (225) formed in the rotor assembly (220) in parallel.

2. The electric machine and controller including an electric oil pump assembly of a cooling oil circuit as set forth in claim 1, wherein: the controller (300) is arranged on the motor (200), the motor (200) is arranged above the mechanical oil pump (100), the stator assembly (210) is arranged in the motor shell (230), the rotor assembly (220) is arranged in the stator assembly (210), the first rolling bearing (222) is arranged at one end close to the mechanical oil pump (100), and the second rolling bearing (226) is arranged at the other end of the driving shaft (221).

3. The electric machine and controller including an electric oil pump assembly of a cooling oil circuit as set forth in claim 1, wherein: the rotor set (110) is composed of an inner rotor (111) and an outer rotor (112), and the oil inlet (120) and the oil outlet (130) are arranged at the bottom or the side face of the mechanical oil pump (100).

4. The electric machine and controller including an electric oil pump assembly of a cooling oil circuit as set forth in claim 1, wherein: the stator assembly (210) has a lower end surface (212) and an inner surface (213), and the inner oil groove (214) is disposed on the inner surface (213).

5. An electric motor and controller comprising an electric oil pump assembly of a cooling oil circuit according to claim 1 or 2, characterized in that: the rotor subassembly (220) still includes rotor silicon steel sheet (223), sets up magnet (224) in rotor silicon steel sheet (223), magnet (224) are provided with a plurality ofly and are cyclic annular setting, oil groove (225) are provided with a plurality ofly and are the inboard that cyclic annular located magnet (224).

6. The electric machine and controller including the electric oil pump assembly of the cooling oil circuit as set forth in claim 3, wherein: the inner rotor (111) is connected with the driving shaft (221) in one of a flat driving connection mode, an interference press-fit connection mode, a spline connection mode and a key connection mode.

7. The electric machine and controller including an electric oil pump assembly of a cooling oil circuit as set forth in claim 1, wherein: the motor shell (230) is provided with an inner end face (233) and an inner wall (235), and the motor shell (230) is provided with an oil return hole (231) and an oil inlet hole (234).

8. The electric machine and controller including an electric oil pump assembly of a cooling oil circuit as set forth in claim 7, wherein: the oil inlet hole (234) is communicated with an inlet of the cooling oil path (B), and the oil return hole (231) is communicated with an outlet of the first cooling oil path (A) and an outlet of the second cooling oil path (B).

9. The electric machine and controller including an electric oil pump assembly of a cooling oil circuit as set forth in claim 7, wherein: the oil return hole (231) and the oil inlet hole (234) are communicated with the oil inlet (120).

10. An electric motor and controller comprising an electric oil pump assembly of a cooling oil circuit as set forth in claim 1 or 3, wherein: the rotor set (110) is one of an internal gear pump, an external gear pump and a vane pump.

Technical Field

The invention relates to an electric oil pump, in particular to an electric oil pump assembly with a motor and a controller containing cooling oil ways, and belongs to the technical field of automobile parts.

Background

The electric oil pump works on the automobile for a long time, and the electric oil pump is required to have high operation reliability and long service life, and also required to have good working efficiency and large power density.

The arrangement structure of electric oil pump mainstream on the market at present includes mechanical oil pump, a whole module structure is arranged into in motor and controller three integration, wherein mechanical oil pump arranges at the front end, the motor is arranged in the centre, the controller is arranged at the rear end, electric oil pump is through axle direct drive mechanical oil pump by the motor, generally be that the fluid of installation a rotatory oil blanket in order to completely cut off mechanical oil pump gets into the motor between drive shaft and the shaft hole that corresponds, friction between drive shaft and the rotatory oil blanket can cause power loss, reduce electric oil pump's mechanical efficiency, in the use, rubber spare on the rotatory oil blanket can wear and tear, the risk of revealing has, the operating life of electric oil pump has also been restricted simultaneously.

On the other hand, because the electric oil pump is generally arranged on an engine or a gearbox, the limit temperature of the surrounding environment is very high, when the electric oil pump is arranged outside a shell of an engine body or a gearbox body, the motor can only take away heat basically by heat conduction of a metal shell, and the heat dissipation of the controller is mainly carried out by natural convection through a heat dissipation rib at the rear end of the controller. During actual operation, the automobile sometimes needs the electric oil pump to input large current to output large-power oil mass and oil pressure, so that the motor and the controller generate large heat in a short time to cause the temperature to rise rapidly; the higher the temperature is, the greater the influence on the working efficiency of the motor and the controller is, and the motor and the controller can be burnt when the temperature is too high, so that the service life of the electric oil pump is influenced.

Disclosure of Invention

The invention aims to provide an electric oil pump assembly which is internally provided with a rotary oil seal structure and two paths of active cooling oil path structures, aiming at the defects in the prior art.

In order to achieve the above object, the present invention provides an electric oil pump assembly including a cooling oil path for a motor and a controller, the electric oil pump comprising a mechanical oil pump, a motor and a controller, the mechanical oil pump including a rotor set, an oil inlet and an oil outlet, the motor including a stator assembly, a rotor assembly and a motor housing, the controller including a controller housing, the controller housing having a bottom end face, the electric oil pump further including a first cooling oil path, the first cooling oil path including a first oil path and a second oil path, the first oil path being formed by a gap between a drive shaft provided at the center of the rotor assembly and a shaft hole provided in the motor housing, the second oil path being formed by a gap inside a first rolling bearing provided at one end of the drive shaft; the second cooling oil way comprises a third oil duct, a fourth oil duct and a fifth oil duct, the third oil duct is composed of a plurality of outer oil grooves formed in the outer surface of the stator assembly, the fourth oil duct is composed of a gap between the bottom end face and the upper end face of the stator assembly, and the fifth oil duct is composed of an air gap between the stator assembly and the rotor assembly, a plurality of inner oil grooves formed in the stator assembly and oil grooves formed in the rotor assembly in parallel.

As a further improvement of the above scheme, the controller is disposed on the motor, the motor is disposed above the mechanical oil pump, the stator assembly is disposed in the motor housing, the rotor assembly is disposed in the stator assembly, the first rolling bearing is disposed at one end close to the mechanical oil pump, and the second rolling bearing is disposed at the other end of the driving shaft.

As a further improvement of the scheme, the rotor set consists of an inner rotor and an outer rotor, and the oil inlet and the oil outlet are arranged at the bottom or the side surface of the mechanical oil pump.

As a further improvement of the above aspect, the stator assembly has a lower end surface and an inner surface, and the internal oil groove is provided on the inner surface.

As a further improvement of the above scheme, the rotor assembly further comprises a rotor silicon steel sheet and a magnet arranged in the rotor silicon steel sheet, wherein the magnet is provided with a plurality of annular arrangements, and the oil groove is provided with a plurality of annular arrangements and is arranged on the inner side of the magnet.

As a further improvement of the scheme, the inner rotor is connected with the driving shaft in one of a flat driving connection mode, an interference press fit connection mode, a spline connection mode and a key connection mode.

As a further improvement of the scheme, the motor shell is provided with an inner end face and an inner wall, and the motor shell is provided with an oil return hole and an oil inlet hole.

As a further improvement of the scheme, the oil inlet hole is communicated with an inlet of the cooling oil way, and the oil return hole is communicated with an outlet of the first cooling oil way and an outlet of the second cooling oil way.

As a further improvement of the scheme, the oil return hole and the oil inlet hole are communicated with the oil inlet.

As a further improvement of the above scheme, the rotor set is one of an internal-meshing rotor pump, an external-meshing gear pump and a vane pump.

The invention has the beneficial effects that: the electric oil pump assembly with the motor and the controller containing the cooling oil circuit cancels the rotary oil seal for dynamic sealing on the driving shaft of the electric oil pump module, thereby not only reducing the cost of the whole system, but also reducing the friction work loss between the oil seal and the shaft, improving the mechanical efficiency of the electric oil pump and simultaneously prolonging the service life of the electric oil pump;

the mechanical oil pump selects a structural design scheme of double-sided oil absorption, partial oil extracted by the oil inlet is conveyed to enter the cooling oil path and finally returns to the oil absorption cavity of the mechanical oil pump, and the double-sided oil absorption design scheme reduces the pressure drop of an oil inlet pipeline, improves the volume efficiency of the mechanical oil pump, greatly improves the rotating speed of the mechanical oil pump when insufficient high-rotating-speed oil absorption occurs, and reduces the long-time durable cavitation influence; on the other hand, the oil liquid contacts with the inner end faces of the motor stator assembly, the motor rotor assembly and the controller in the process of flowing through the active cooling oil way, the heat emitted by the motor and the controller in the working operation process is taken away, and the temperature rise of the motor and the controller can be effectively reduced, so that the working efficiency and the power density of the motor and the controller are improved, the size of the motor and the controller is reduced, and the cost is reduced.

Drawings

FIG. 1 is a perspective view of an electric oil pump assembly including a cooling oil circuit for an electric motor and controller according to an embodiment of the present invention;

FIG. 2 is a front view of an electric oil pump assembly with a motor and controller including cooling oil passages according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic view of a stator assembly;

FIG. 5 is yet another structural schematic of the stator assembly;

FIG. 6 is a schematic view of the structure of the rotor assembly;

FIG. 7 is a schematic diagram of a rotor set in a mechanical oil pump;

FIG. 8 is a schematic view of the internal structure of the motor housing;

fig. 9 is a schematic structural view of the controller case.

The parts of the drawings are numbered as follows:

100-a mechanical oil pump; 110-a rotor set; 111-an inner rotor; 112-outer rotor; 120-an oil inlet; 130-an oil outlet;

200-a motor; 210-a stator assembly; 211-upper end face; 212-lower end face; 213-an inner surface; 214-internal oil groove; 215-outer oil sump; 220-a rotor assembly; 221-a drive shaft; 222-a first rolling bearing; 223-rotor silicon steel sheet; 224-a magnet; 225-oil groove; 226-a second rolling bearing; 230-a motor housing; 231-oil return holes; 232-axle hole; 233-inner end face; 234-oil inlet hole; 235-inner wall;

300-a controller; 310-a controller housing; 311-bottom end face.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.