CN111313616A - Motor shell internal circulation integrated cooling system - Google Patents

Abstract

The invention discloses an internal circulation integrated cooling system of a motor shell, which comprises a motor shell, a gearbox shell, a cooling oil duct and an external heat dissipation module, wherein the cooling oil duct is arranged in the motor shell and the gearbox shell, the top of the outer side of the box is provided with a horizontal heat dissipation surface, and the horizontal heat dissipation surface is provided with the external heat dissipation module. Compared with the prior art, the invention has high heat dissipation efficiency and greatly improves the cooling efficiency of the motor shell and the gear box shell. Still be equipped with horizontal radiating surface, external heat dissipation module can superpose fast promotes the heat radiating area and the heat dissipation volume of motor rapidly.

Description

A circulating integrated cooling system in a motor shell

technical field

The invention relates to the technical field of motors, in particular to an integrated cooling system for circulation in a motor casing.

Background technique

With the development, promotion and popularization of new energy electric vehicles, the development of drive motors for electric vehicles has become a new topic. The drive motor for electric vehicles is a working device that converts electrical energy into mechanical energy. Compared with ordinary drag motors, its working environment has problems such as less space for installation, higher working temperature, large outdoor temperature difference, and frequent starts. Therefore, the drive motor is required to have the characteristics of high efficiency, low temperature, and small size. The motor casing needs to be cooled in many cases. At present, the cooling methods of the motor casing on the market are divided into water cooling and air cooling. Several through holes are arranged axially on the motor casing, and are arranged on the side walls on both sides by staggering. The groove and the sealing ring on the motor casing are connected to form an S-shaped closed channel, so that a number of through holes are axially arranged on the motor casing, so as to form an axial circuitous cooling water channel on the motor casing. This kind of structure has a simple processing process, but there are some problems. The S-shaped closed channel needs to be formed with the help of a sealing ring, and when the flanges on both sides are connected to the motor housing, if the fixing screw holes are arranged in the motor housing On the side end face, a plurality of through holes for the screws to pass through need to be set on the sealing ring, which will affect the sealing performance of the cooling water channel, and the cold water channel can only be formed after the flange and the sealing ring are installed. It will also cause many inconveniences in the detection of sealing performance.

Most of the existing new energy vehicle drive motor parts are composed of motor parts, water pump or oil pump parts, connecting pipes, and cooling box parts. There are many parts and the layout of the installation space is complex, which has a great impact on the standardized application of products. And the failure rate is high, and the reliability is affected by weak components, such as pipeline aging, transmission failure, etc. With the development of the automobile industry, the miniaturization, high power density and high reliability of the motor have put forward higher requirements. How to efficiently and reliably dissipate heat is the core of the technology upgrade.

Therefore, designing a cooling and heat dissipation system with a highly integrated structure, modular function, and efficient heat dissipation is an inevitable demand of the new energy vehicle drive motor industry.

SUMMARY OF THE INVENTION

The invention provides a circulation integrated cooling system in a motor casing.

In order to solve the above-mentioned technical problems, technical scheme of the present invention is:

A circulating integrated cooling system in a motor casing, including a drive system, the drive system including a motor, including a motor casing, a gear box casing, a cooling oil passage, and an external heat dissipation module, the motor casing is fixed inside There is a motor, a gear box is fixed in the gear box casing, an oil pump is arranged inside the gear box, the cooling oil passage is arranged in the motor casing and the gear box casing, and the oil inlet of the cooling oil passage is The port is communicated with the oil outlet of the oil pump. The cooling oil passage includes a linear oil passage and an annular oil passage. The linear oil passage is arranged in parallel with the motor axis, and the end faces of the linear oil passage are communicated and connected through the annular oil passage. The linear oil passage and the annular oil passage are integrally arranged and form a closed circuit. The motor housing includes a front end cover, a box body and a rear end cover. The top of the outer side of the box body is provided with a horizontal heat dissipation surface. There is an external heat dissipation module on the surface, the horizontal heat dissipation surface is provided with a mounting hole fixedly connected with the external heat dissipation module, the external heat dissipation module is communicated with the cooling oil passage, and the external heat dissipation module includes an oil storage cavity, the oil inlet of the external heat dissipation module, and the oil outlet of the external heat dissipation module, the oil inlet of the external heat dissipation module and the oil outlet of the external heat dissipation module are respectively arranged in communication with the oil storage cavity, The oil port is connected with the oil pump, and the oil outlet of the external heat dissipation module is connected with the cooling oil passage.

Further, a plurality of linear oil passages on the motor housing are arranged in parallel with each other and communicated with each other through annular oil passages.

Further, the linear oil passages include a plurality of oil passages arranged in parallel at the top, a plurality of oil passages arranged in parallel at the bottom, and 4 oil passages located on both sides respectively.

Further, the drive system also includes a reduction box and a controller, the motor, the reduction box, and the controller are integrated and integrated, the motor and the reduction box are coaxially output, and the horizontal heat dissipation surface is provided with a control device for installation and control. The installation point of the controller, the controller is located on the top of the horizontal heat dissipation surface and is arranged in parallel with the horizontal heat dissipation surface.

Further, the bottom of the external heat dissipation module is arranged in parallel with the horizontal heat dissipation surface and is abutted and connected.

Further, the motor housing and the gearbox housing are fixedly connected, and a common housing is provided at the connection.

Further, the connection between the oil outlet of the external heat dissipation module and the cooling oil passage is located on the motor housing and is arranged close to the gearbox housing.

Compared with the prior art, the present invention is applied to the drive motor of the new energy vehicle to dissipate heat, and the heat dissipation method is mainly circulated in the motor housing and the gearbox housing through the gearbox lubricating oil, so that the heat of the motor is circulated through the lubricating oil. It is quickly transferred to the surface of the casing for heat exchange with the air, and the heat dissipation efficiency is high. The cooling oil passage of the present invention is a combination of straight oil passages and annular oil passages, and the oil passages in the casing parallel to the motor shaft are straight oil passages, which avoids complicated oil passage processing techniques; The liquid forms an annular circulation in the entire motor housing and the gearbox housing, which greatly improves the cooling efficiency of the motor housing and the gearbox housing. The present invention also has a horizontal heat dissipation surface, which can quickly superimpose an external heat dissipation module to rapidly increase the heat dissipation area and heat dissipation volume of the motor.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Figure 2 is a schematic structural diagram of a motor housing;

Figure 3 is a schematic structural diagram of a cooling oil passage;

FIG. 4 is a schematic structural diagram of an external heat dissipation module.

In the picture: 1. Motor housing; 2. Oil outlet of oil pump; 3. Oil inlet of external cooling module; 4. Oil outlet of external cooling module; 5. Horizontal cooling surface; 6. Motor; 7. Oil pump; 8. Linear oil passage; 9. Circular oil passage; 10. Cooling oil passage; 11. External cooling module; 12. Front end cover; 13. Box body; 14. Rear end cover.

Detailed ways

The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted here that the descriptions of these embodiments are used to help the understanding of the present invention, but do not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

As shown in FIG. 1, an integrated cooling system with circulation in a motor casing includes a drive system. The drive system includes a motor 6, including a motor casing 1, a gearbox casing, a cooling oil passage 10, and an external heat dissipation module. 11. The drive system further includes a reduction box and a controller, the motor 6, the reduction box, and the controller are integrated and integrated, and the motor 6 and the reduction box output coaxially.

As shown in FIG. 2 , a motor 6 is fixed inside the motor housing 1 , a gear box is fixed inside the gear box housing, and an oil pump 7 is arranged inside the gear box.

As shown in FIG. 3 , the cooling oil passage 10 is arranged in the motor housing 1 and the gearbox housing, the motor housing 1 and the gearbox housing are fixedly connected and a common housing is provided at the connection.

The oil inlet of the cooling oil passage 10 is arranged in communication with the oil outlet 2 of the oil pump 7 . The cooling oil passage 10 includes a linear oil passage 8 and an annular oil passage 9 , and the linear oil passage 8 is axially parallel to the motor 6 . The linear oil passages 8 on the motor housing 1 are arranged in parallel with each other and communicate with each other through the annular oil passages 9 . The linear oil passages 8 include a plurality of oil passages arranged in parallel at the top, a plurality of oil passages arranged in parallel at the bottom, and four oil passages at two sides respectively. The end faces of the linear oil passages 8 are communicated and connected through the annular oil passages 9 , and the linear oil passages 8 and the annular oil passages 9 are integrally arranged and form a closed circuit. The linear oil passage 8 is combined with the annular oil passage 9. The inner oil passage in the casing parallel to the axis of the motor 6 is the linear oil passage 8. The linear oil passage 8 is connected to the annular oil passage through the combination of the motor casing and the end cover of the gearbox casing; The liquid forms an annular flow path in the circulating motor housing and gearbox housing. The motor housing 1 and the gear box housing are produced by pressing a die or a linear extrusion production process, and the product has high production efficiency and high product qualification rate.

The motor housing 1 includes a front end cover 12 , a box body 13 and a rear end cover 14 . The top of the outer side of the box body 13 is provided with a horizontal heat dissipation surface 5 , and an external heat dissipation module 11 is provided on the horizontal heat dissipation surface 5 The horizontal heat dissipation surface 5 is provided with a mounting hole fixedly connected with the external heat dissipation module 11 , and the external heat dissipation module 11 is communicated with the cooling oil passage 10 . The horizontal heat dissipation surface 5 is provided with a mounting point for installing a controller, and the controller is located on the top of the horizontal heat dissipation surface 5 and is arranged in parallel with the horizontal heat dissipation surface 5 .

The entire cooling oil passage 10 has no complicated pipes that need to be threaded, the transmission distance is short, and the efficiency is high, which can fully solve the rapid thermal balance of heat dissipation when the motor 6 starts to work.

As shown in FIG. 4 , the external heat dissipation module 11 includes an oil storage cavity, an oil inlet 3 of the external heat dissipation module 11 , and an oil outlet 4 of the external heat dissipation module. The oil outlet 4 of the heat dissipation module 11 is communicated with the oil storage cavity respectively, the oil inlet 3 of the external heat dissipation module is connected to the oil pump 7 , and the oil outlet 4 of the external heat dissipation module is connected to the cooling oil passage 10 . The oil enters the circuit of the cooling oil passage 10 through the oil pump, and returns to the external heat dissipation module 11 through the oil inlet 3 of the external heat dissipation module 11. The bottom of the external heat dissipation module 11 is arranged in parallel with the horizontal heat dissipation surface 5 and abuts against it. connect. The connection between the oil outlet 4 of the external heat dissipation module and the cooling oil passage 10 is located on the motor housing 1 and is arranged close to the gearbox housing.

The oil pump 7 extends the oil into the front cover 12 through the oil channel, then flows into the horizontal heat dissipation surface 5 through the oil channel, then flows into the rear end cover 14 through the oil channel, then flows into the motor housing 1 through the oil channel, and finally flows into the gear through the oil channel. box.

The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present invention, various changes, modifications, substitutions and alterations to these embodiments still fall within the protection scope of the present invention.

Claims (8)

1. An integrated cooling system for an in-shell circulation of an electric machine, comprising a drive system, said drive system comprising an electric machine (6) characterized in that: the cooling device comprises a motor shell (1), a gear box shell, a cooling oil duct (10) and an external heat dissipation module (11), wherein a motor (6) is fixedly arranged in the motor shell (1), a gear box is fixedly arranged in the gear box shell, an oil pump (7) is arranged inside the gear box, the cooling oil duct (10) is arranged in the motor shell (1) and the gear box shell, an oil inlet of the cooling oil duct (10) is communicated with an oil outlet (2) of the oil pump (7), the cooling oil duct (10) comprises a linear oil duct (8) and an annular oil duct (9), the linear oil duct (8) and the motor (6) are arranged in an axial parallel mode, the end face of the linear oil duct (8) is communicated and connected through the annular oil duct (9), the linear oil duct (8) and the annular oil duct (9) are integrally arranged to form a closed loop, and the motor shell (, The oil cooling structure comprises a box body (13) and a rear end cover (14), wherein a horizontal radiating surface (5) is arranged at the top of the outer side of the box body (13), an external radiating module (11) is arranged on the horizontal radiating surface (5), a mounting hole fixedly connected with the external radiating module (11) is formed in the horizontal radiating surface (5), the external radiating module (11) is communicated with a cooling oil duct (10), the external radiating module (11) comprises an oil storage cavity, an external radiating module oil inlet (3) and an external radiating module oil outlet (4), the external radiating module oil inlet (3) and the external radiating module oil outlet (4) are respectively communicated with the oil storage cavity, the external radiating module oil inlet (3) is connected with an oil pump (7), and the external radiating module oil outlet (4) is connected with the cooling oil duct (10).

2. The in-motor-casing-circulation-integrated cooling system of claim 1, wherein: linear oil ducts (8) on the motor shell (1) are arranged in parallel and communicated through annular oil ducts (9).

3. The in-motor-casing-circulation-integrated cooling system of claim 2, wherein: the straight line oil duct (8) comprises a plurality of parallel oil ducts positioned at the top, a plurality of parallel oil ducts positioned at the bottom and 4 oil ducts respectively positioned at two sides.

4. The in-motor-casing-circulation-integrated cooling system of claim 1, wherein: the driving system further comprises a reduction gearbox and a controller, the motor (6), the reduction gearbox and the controller are integrally arranged, and the motor (6) and the reduction gearbox output coaxially.

5. The in-motor-casing-circulation-integrated cooling system of claim 3, wherein: the controller is characterized in that a mounting point for mounting the controller is arranged on the horizontal radiating surface (5), and the controller is located at the top of the horizontal radiating surface (5) and is arranged in parallel with the horizontal radiating surface (5).

6. The in-motor-casing-circulation-integrated cooling system of claim 1, wherein: the bottom of the external heat dissipation module (11) is connected with the horizontal heat dissipation surface (5) in a propping manner.

7. The in-motor-casing-circulation-integrated cooling system of claim 1, wherein: the motor shell (1) and the gear box shell are fixedly connected, and a common shell is arranged at the joint.

8. The in-motor-casing-circulation-integrated cooling system of claim 1, wherein: the connection position of the external heat dissipation module oil outlet (4) and the cooling oil duct (10) is located on the motor shell (1) and close to the gearbox shell.

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