阅读说明：本技术 一种对电机和控制器进行油冷的电动油泵总成 (Electric oil pump assembly for carrying out oil cooling on motor and controller ) 是由 祝强华 秦杰 瞿世虎 于 2020-05-22 设计创作，主要内容包括：本发明公开了一种对电机和控制器进行油冷的电动油泵总成包括转子组、进油口和出油口,所述转子组由内转子和外转子组成,所述电机置于机械油泵的上方,所述电机包括定子组件、转子组件和电机外壳,所述定子组件置于电机外壳内,所述转子组件置于定子组件内,所述控制器置于所述电机上,所述控制器包括控制器壳体,所述控制器壳体具有底端面,所述冷却油路包括第一油道、第二油道、第三油道、第四油道和第五油道,所述冷却油路A的出口与进油口相通；本发明取消电动油泵模块的驱动轴上的动密封用旋转油封,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 for cooling oil of a motor and a controller, which comprises a rotor set, an oil inlet and an oil outlet, wherein the rotor set consists of an inner rotor and an outer rotor; the invention cancels the rotary oil seal for dynamic seal 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.)

1. The utility model provides a carry out oil-cooled electric oil pump assembly to motor and controller which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the mechanical oil pump (100), the mechanical oil pump (100) includes a rotor set (110), an oil inlet (120) and an oil outlet (130), the rotor set (110) is composed of an inner rotor (111) and an outer rotor (112);

a motor (200), the motor (200) being disposed above the mechanical oil pump (100), the motor (200) including a stator assembly (210), a rotor assembly (220), and a motor housing (230), the stator assembly (210) being disposed within the motor housing (230), the rotor assembly (220) being disposed within the stator assembly (210), the rotor assembly (220) including a drive shaft (221);

a controller (300), the controller (300) disposed on the motor (200), the controller (300) including a controller housing (310), the controller housing (310) having a bottom end face (311);

the cooling oil way (A) comprises a first oil duct, a second oil duct, a third oil duct, a fourth oil duct and a fifth oil duct, and an outlet of the cooling oil way (A) is communicated with the oil inlet (120).

2. The electric oil pump assembly for oil cooling a motor and a controller of claim 1, wherein: the oil inlet (120) and the oil outlet (130) are arranged on the bottom end face or the side face of the mechanical oil pump (100).

3. The electric oil pump assembly for oil cooling a motor and a controller of claim 1, wherein: stator module (210) has up end (211), lower terminal surface (212), internal surface (213), stator module (210) inboard is equipped with a plurality of interior oil grooves (214), and its outside is equipped with a plurality of outer oil grooves (215), outer oil groove (215) form into the fifth oil duct.

4. The electric oil pump assembly for oil cooling a motor and a controller of claim 1, wherein: the rotor assembly (220) further comprises a first rolling bearing (222) and a second rolling bearing (226) which are arranged at two ends of the driving shaft (221), a rotor silicon steel sheet (223) arranged between the first rolling bearing (222) and the second rolling bearing (226), a magnet (224) and an oil groove (225) arranged in the rotor silicon steel sheet (223), the first rolling bearing (222) is arranged on one side close to the mechanical oil pump (100), and a second oil channel is formed in a gap inside the first rolling bearing (222).

5. The electric oil pump assembly for oil cooling a motor and a controller of claim 4, wherein: magnet (224) and oil groove (225) all are provided with a plurality ofly and are the annular setting, the inboard of magnet (224) is located in oil groove (225).

6. The electric oil pump assembly for oil cooling a motor and a controller of claim 4, wherein: the driving shaft (221) is connected with the inner rotor (111) 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 oil pump assembly for oil cooling a motor and a controller of claim 1, wherein: the motor shell (230) is provided with an oil return hole (231) and an axle hole (232), the oil return hole (231) is communicated with the cooling oil way (A), and the motor shell (230) is provided with an inner end surface (233) and an inner wall (234).

8. The electric oil pump assembly for oil cooling a motor and a controller of claim 7, wherein: shaft hole (232) and drive shaft (221) cooperate the setting, the clearance between drive shaft (221) excircle and shaft hole (232) forms first oil duct.

9. The electric oil pump assembly for oil cooling a motor and a controller of claim 3, wherein: and an air gap between the stator assembly (210) and the rotor assembly (220), the inner oil groove (214) and the oil groove (225) in the rotor assembly (220) are arranged in parallel to form a third oil channel.

10. The electric oil pump assembly for oil cooling a motor and a controller of claim 3, wherein: and a fourth oil channel is formed in a gap between the upper end surface (211) of the stator assembly (210) and the bottom end surface (311) of the controller shell (310).

Technical Field

The invention relates to an electric oil pump, in particular to an electric oil pump assembly for cooling a motor and a controller, 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 overcome the defects in the prior art and provide an electric oil pump, which is internally provided with a rotary oil seal structure, an oil way structure for actively cooling a motor and a controller is added, the cost of the whole system is reduced, and the friction power loss between an oil seal and a shaft is reduced.

In order to achieve the purpose, the invention provides an electric oil pump assembly for carrying out oil cooling on a motor and a controller, which comprises a mechanical oil pump, wherein the mechanical oil pump comprises a rotor set, an oil inlet and an oil outlet, and the rotor set consists of an inner rotor and an outer rotor; the motor is arranged above the mechanical oil pump and comprises a stator assembly, a rotor assembly and a motor shell, wherein the stator assembly is arranged in the motor shell, the rotor assembly is arranged in the stator assembly, and the rotor assembly comprises a driving shaft; a controller disposed on the motor, the controller including a controller housing having a bottom end face; and the cooling oil path comprises a first oil path, a second oil path, a third oil path, a fourth oil path and a fifth oil path, and an outlet of the cooling oil path is communicated with the oil inlet.

As a further improvement of the scheme, the oil inlet and the oil outlet are arranged on the bottom end face or the side face of the mechanical oil pump.

As a further improvement of the above scheme, the stator assembly has an upper end surface, a lower end surface, and an inner surface, the stator assembly is provided with a plurality of inner oil grooves on the inner side, and a plurality of outer oil grooves on the outer side, and the outer oil grooves are formed as a fifth oil passage.

As a further improvement of the above scheme, the rotor assembly further includes a first rolling bearing and a second rolling bearing which are arranged at two ends of the driving shaft, a rotor silicon steel sheet arranged between the first rolling bearing and the second rolling bearing, a magnet and an oil groove arranged in the rotor silicon steel sheet, the first rolling bearing is arranged on one side close to the mechanical oil pump, and a second oil passage is formed in a gap inside the first rolling bearing.

As a further improvement of the above scheme, magnet and oil groove all are provided with a plurality ofly and are the annular setting, the inboard of magnet is located to the oil groove.

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

As a further improvement of the scheme, an oil return hole and a shaft hole are formed in the motor shell, the oil return hole is communicated with the cooling oil circuit, and the motor shell is provided with an inner end face and an inner wall.

As a further improvement of the scheme, the shaft hole is matched with the driving shaft, and a first oil channel is formed in a gap between the excircle of the driving shaft and the shaft hole.

As a further improvement of the above scheme, the air gap between the stator assembly and the rotor assembly, the internal oil groove, and the oil groove inside the rotor assembly form a third oil passage in parallel.

As a further improvement of the above solution, a gap between the upper end surface of the stator assembly and the bottom end surface of the controller housing forms a fourth oil passage.

The invention has the beneficial effects that: the electric oil pump assembly for cooling the motor and the controller by oil eliminates the rotating 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 oil leaked from the interior of the mechanical oil pump is led out from the gap between the shaft and the shaft hole, flows through the active cooling oil way and returns to the oil suction cavity of the mechanical oil pump, and the oil is contacted 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 to take away heat emitted by the motor and the controller in the working operation process, so that the temperature rise of the motor and the controller can be effectively reduced, 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; the volumetric efficiency of the electric oil pump is also improved to a certain extent.

Drawings

FIG. 1 is a perspective view of an electric oil pump assembly for oil cooling a motor and a controller provided in accordance with an embodiment of the present invention;

FIG. 2 is a front view of an electric oil pump assembly for oil cooling a motor and a controller provided by 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-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.