阅读说明：本技术 一种对控制器进行主动冷却的电动油泵总成 (Electric oil pump assembly for actively cooling controller ) 是由 祝强华 刘敏 吴建荣 孟庆历 赵炳雄 张鸣飞 于 2020-09-18 设计创作，主要内容包括：本发明公开了一种对控制器进行主动冷却的电动油泵总成,包括机械油泵、控制器、电机和冷却油路,所述机械油泵包括转子组、下端盖和泵壳体,所述转子组由内转子和外转子组成,所述内转子与位于电机中心的转轴相连接且以相同的转速运行,所述下端盖的下端面设为导热面,所述控制器上设置有大功率发热器件,所述电机包括上端盖,所述上端盖和机械油泵的下端盖之间形成控制器的安装腔体；本发明将控制器布置在整个系统的中间,同时将控制器上大功耗发热器件紧挨着机械油泵的下端盖,使得系统在大负荷工作时控制器上发热器件产生的热量能尽快被下端盖传递给主油道,让冷却油道的油快速带走热量,快速降低控制器的温度。(The invention discloses an electric oil pump assembly for actively cooling a controller, which comprises a mechanical oil pump, a controller, a motor and a cooling oil circuit, wherein the mechanical oil pump comprises a rotor set, a lower end cover and a pump shell, the rotor set comprises an inner rotor and an outer rotor, the inner rotor is connected with a rotating shaft positioned in the center of the motor and runs at the same rotating speed, the lower end surface of the lower end cover is a heat conducting surface, a high-power heating device is arranged on the controller, the motor comprises an upper end cover, and an installation cavity of the controller is formed between the upper end cover and the lower end cover of the mechanical oil pump; according to the invention, the controller is arranged in the middle of the whole system, and the high-power-consumption heating device on the controller is close to the lower end cover of the mechanical oil pump, so that heat generated by the heating device on the controller can be transferred to the main oil duct by the lower end cover as soon as possible when the system works under a large load, the oil in the cooling oil duct can take away the heat quickly, and the temperature of the controller can be reduced quickly.)

1. The utility model provides an electric oil pump assembly who carries out initiative cooling to controller, includes mechanical oil pump (1), controller (2), motor (3) and cooling oil circuit, its characterized in that: the mechanical oil pump (1) is arranged on the controller (2), the controller (2) is arranged on the motor (3), the mechanical oil pump (1) comprises a rotor set (4), a lower end cover (5) and a pump shell (6), the rotor set (4) comprises an inner rotor (7) and an outer rotor (8), the inner rotor (7) is connected with a rotating shaft located at the center of the motor (3) and runs at the same rotating speed, the lower end face of the lower end cover (5) is arranged as a heat conducting face (11), a high-power heating device (9) is arranged on the controller (2), the motor (3) comprises an upper end cover (10), and an installation cavity of the controller (2) is formed between the upper end cover (10) and the lower end cover (5) of the mechanical oil pump (1).

2. The electric oil pump assembly for actively cooling a controller as set forth in claim 1, wherein: the oil pump is characterized in that an oil inlet (12) and an oil outlet (13) are arranged on the mechanical oil pump (1), and the oil inlet (12) and the oil outlet (13) are arranged on the upper end face or the side face of the mechanical oil pump (1).

3. The electric oil pump assembly for actively cooling a controller as set forth in claim 1, wherein: and one of a flat driving mode, an interference fit driving mode, a spline driving mode or a key groove driving connection mode is adopted between the inner rotor (7) and the rotating shaft.

4. The electric oil pump assembly for actively cooling a controller as set forth in claim 1, wherein: the rotor set (4) is one of an internal meshing rotor pump, an external meshing gear pump and a vane pump.

5. The electric oil pump assembly for actively cooling a controller as set forth in claim 1, wherein: the cooling oil way enters from the oil inlet (12), passes through a gap between the lower end face of the rotor set (4) and the lower end cover (5) and then flows out from the oil outlet (13), and the lower end cover (5) and the pump shell (6) are detachably connected through matching of screws and nuts.

6. The electric oil pump assembly for actively cooling a controller as set forth in claim 1, wherein: the heat emitted by the high-power heating device (9) is transferred to the cooling oil circuit through the heat conducting surface (11).

Technical Field

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

Background

The electric oil pump on the market at present mainly has two arrangement structures;

the structure I is as follows: the oil pump and the brushless motor are integrated and arranged together, the controller is independently arranged at other places, and the controller and the brushless motor are connected with each other through a wiring harness and two ends/two sets of waterproof connectors for power supply and communication.

In practical use, since the vehicle-mounted power supply voltage is low (12V), the current on the wire harness is large, and the loss of the wire harness itself is very large. The two ends of the wire harness are respectively connected with the brushless motor and the controller through connectors, the connectors have unavoidable contact resistance, and under the condition of large current, connection loss caused by the contact resistance is also very large.

The problems brought by adopting the arrangement structure are that: 1. the efficiency of the whole system is reduced by 3-7%; 2. due to the existence of the wiring harness and the two sets of waterproof connectors, the cost of the whole system is obviously increased; 3. the controller does not have any active cooling, so that the power density of the controller is low and the volume of the controller is large.

The structure II is as follows: the oil pump, the brushless motor and the controller are integrally arranged together, wherein the oil pump is arranged at the front end, the brushless motor is arranged in the middle, and the controller is arranged at the rear end.

The problems brought by adopting the arrangement structure are that: the heat dissipation of controller mainly carries out natural convection heat dissipation through this body rear end heat dissipation muscle, although oil in the oil circuit also can take away partial heat through metal casing's transmission, but because the distance is far away, a brushless motor is still kept apart to the centre, the heat that can take away is very limited, lead to the volume of controller can not better optimization reduce, at whole car gearbox position, the electric oil pump mainly gives gearbox cooling, lubrication, the use of shifting gears, need account for a relatively great space, it is more difficult to arrange.

Disclosure of Invention

The invention aims to provide an electric oil pump assembly which is integrally arranged and can be used for actively cooling a controller without a middle connecting wire harness and waterproof connectors at two ends.

In order to achieve the purpose, the invention provides an electric oil pump assembly for actively cooling a controller, which comprises a mechanical oil pump, the controller, a motor and a cooling oil circuit, wherein the mechanical oil pump is arranged on the controller, the controller is arranged on the motor, the mechanical oil pump comprises a rotor set, a lower end cover and a pump shell, the rotor set comprises an inner rotor and an outer rotor, the inner rotor is connected with a rotating shaft positioned in the center of the motor and runs at the same rotating speed, the lower end surface of the lower end cover is a heat conducting surface, a high-power heating device is arranged on the controller, the motor comprises an upper end cover, and an installation cavity of the controller is formed between the upper end cover and the lower end cover of the mechanical oil pump.

As a further improvement of the above scheme, the mechanical oil pump is provided with an oil inlet and an oil outlet, and the oil inlet and the oil outlet are arranged on the upper end face or the side face of the mechanical oil pump.

As a further improvement of the above scheme, one of a flat drive, an interference fit drive, a spline drive or a key groove drive connection mode is adopted between the inner rotor and the rotating shaft.

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

As a further improvement of the scheme, the cooling oil path enters from the oil inlet, passes through a gap between the lower end face of the rotor set and the lower end cover and flows out from the oil outlet, and the lower end cover (5) is detachably connected with the pump shell in a screw and nut matching mode.

As a further improvement of the above scheme, the heat emitted from the high-power heating device is transferred to the cooling oil path through the heat conducting surface.

The invention has the beneficial effects that: the electric oil pump assembly for actively cooling the controller arranges the mechanical oil pump, the motor and the controller together, saves a connecting wire harness in the middle and waterproof connectors at two ends, reduces the cost of the whole system, and improves the system efficiency by 3-7%;

arrange the controller in entire system's centre, simultaneously with the lower end cover that the device that generates heat of big consumption on the controller is close to mechanical oil pump, make the system generate heat the device on the controller and produce the heat can be transmitted for the main oil duct by the lower end cover as early as possible when heavy load during operation, let the oil of cooling oil duct take away the heat fast, reduce the temperature of controller fast, thereby the power density of controller has been promoted, the effectual controller volume that has reduced, make entire system compacter, do benefit to the arrangement on whole car gearbox.

Drawings

FIG. 1 is a schematic diagram of an electric oil pump assembly for actively cooling a controller according to an embodiment of the present invention;

FIG. 2 is a partial cross-sectional view of an electric oil pump assembly with active cooling of a controller provided by an embodiment of the present invention;

FIG. 3 is a schematic structural view of the rotor set of FIG. 2;

fig. 4 is a schematic structural view of the controller mounting cavity.

The parts of the drawings are numbered as follows: 1. a mechanical oil pump; 2. a controller; 3. a motor; 4. a rotor set; 5. a lower end cover; 6. a pump housing; 7. an inner rotor; 8. an outer rotor; 9. a high power heat generating device; 10. an upper end cover; 11. a heat conducting surface; 12. an oil inlet; 13. and an oil outlet.

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.

Example 1

As shown in fig. 1 to 4, an electric oil pump assembly for actively cooling a controller includes a mechanical oil pump 1, a controller 2, a motor 3 and a cooling oil path, the mechanical oil pump 1 is disposed on the controller 2, the controller 2 is disposed on the motor 3, the mechanical oil pump 1 includes a rotor set 4, a lower end cap 5 and a pump housing 6, the rotor set 4 is composed of an inner rotor 7 and an outer rotor 8, the inner rotor 7 is connected with a rotating shaft located at the center of the motor 3 and operates at the same rotating speed, the lower end face of the lower end cap 5 is set as a heat conducting face 11, a high-power heating device 9 is disposed on the controller 2, the motor 3 includes an upper end cap 10, and an installation cavity of the controller 2 is formed between the upper end cap 10 and the lower end cap 5 of the mechanical oil pump 1.

In this embodiment, the mechanical oil pump 1 is provided with an oil inlet 12 and an oil outlet 13, as shown in fig. 2, the oil inlet 12 and the oil outlet 13 are disposed on an upper end surface of the mechanical oil pump 1, and positions of the oil inlet 12 and the oil outlet 13 may be adjusted according to a structural design of an engine or a transmission in actual use, or may be placed on a side surface of the mechanical oil pump.

As shown in fig. 3, the rotor set 4 is an internal-meshing rotor pump, and in practical application, other mechanical oil pump modes such as an external-meshing gear pump and a vane pump can be selected, the inner rotor 7 and the rotating shaft are in flat driving connection, and in practical application, other connection modes such as interference fit driving, spline driving, or key slot driving can be selected; in addition, in practical application, the mechanical oil pump 1 and the motor 3 may have a driving shaft, that is, the driving shaft of the motor 3 drives the shaft of the mechanical oil pump 1, and then the shaft of the mechanical oil pump 1 directly drives the inner rotor 7.

Further, the cooling oil path enters from the oil inlet 12, passes through a gap between the lower end face of the rotor set 4 and the lower end cover 5, and then flows out from the oil outlet 13, the lower end cover 5 and the pump housing 6 are detachably connected through screw and nut matching, and heat emitted from the high-power heating device 9 is transferred to the cooling oil path through the heat conducting surface 11.

The cooling oil way is a main oil way of the mechanical oil pump 1, and oil in an oil tank of the engine or the gearbox enters from the oil inlet 12 and returns to the oil tank of the engine or the gearbox from the oil outlet 13; the heat emitted from the high-power heating device 9 is transferred to the main oil way through the heat conducting surface 11 of the lower end cover 5, so that the heat is rapidly carried away by the oil in the main oil way.

In summary, according to the electric oil pump assembly for actively cooling the controller in the above embodiment, the mechanical oil pump, the motor and the controller are arranged together, so that a middle connecting wire harness and waterproof connectors at two ends are omitted, the cost of the whole system is reduced, and the system efficiency is improved by 3% -7%;

arrange the controller in entire system's centre, simultaneously with the lower end cover 5 that the device that generates heat of big consumption on the controller is close to mechanical oil pump, make the system generate heat the device on the controller and produce the heat and can be given the main oil duct by lower end cover 5 transmission as early as possible when heavy load during operation, let the oil of cooling oil duct take away the heat fast, reduce the temperature of controller fast, thereby the power density of controller has been promoted, the effectual controller volume that has reduced, make entire system compacter, do benefit to the arrangement on whole car gearbox.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.