CN211930442U

CN211930442U - Oil-cooled motor

Info

Publication number: CN211930442U
Application number: CN202020560282.1U
Authority: CN
Inventors: 王迪
Original assignee: Suzhou Lego Motors Co ltd
Current assignee: Suzhou Lego Motors Co ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2020-11-13
Anticipated expiration: 2030-04-15

Abstract

An oil-cooled motor comprises a shell, an end cover, a stator core, a stator winding and a rotor core, wherein the stator core, the stator winding and the rotor core are arranged in the shell; an oil inlet and an oil outlet are formed in the end part, facing the end cover, of the shell; an oil pump connecting area is arranged on the end cover; an oil inlet channel and an oil outlet channel are formed in the shell wall of the end cover, one end of the oil inlet channel is correspondingly communicated with the oil inlet, and the other end of the oil inlet channel extends into the pump connecting area to serve as an inlet of the oil inlet channel; one end of the oil outlet channel is correspondingly communicated with the oil outlet, and the other end of the oil outlet channel also extends into the pump connecting area to be used as an oil inlet channel outlet; the pump connection area is externally connected with an oil pump. And a cooling water channel is also arranged in the shell wall of the shell of the oil-cooled motor, and the cooling water channel is arranged close to the oil duct and the oil storage tank. Adopt the utility model discloses, the accessory can be retrencied to the simple structure of oil-cooled motor assembly oil pump, is of value to arrange the compactness, and the cooling effect is good.

Description

Oil-cooled motor

Technical Field

The utility model relates to a motor thermal control technical field, in particular to oil cooling motor.

Background

In recent years, with the rapid development of motor technology, people have higher and higher requirements on the quality of motors. In the process of improvement, the power of the motor is improved, and simultaneously the weight of the whole motor is reduced, so that the heat productivity of the motor is larger, particularly, the heat dissipation problem of the end part of a stator winding becomes more important, and therefore, the modern motor tends to favor the oil cooling technology. The main purpose of the technology is to cool the end part of the motor stator winding and reduce the heat island effect in the motor, thereby improving the stability and prolonging the service life of the motor. One of the important applications where oil cooling technology is used is the drive motor on automobiles, and the arrangement of the entire automobile generally has very strict requirements on the structural arrangement of the oil cooling motor as an automobile component.

However, in the prior art, there are certain disadvantages. First, in chinese patent CN201210088867.8, the oil inlet and outlet ports of the oil-cooled motor are usually disposed in two relatively distributed areas on the motor housing. The design ensures that a cooling oil path in the motor is matched with a longer pipeline when being connected with the oil pump, so that the structure is not compact enough, the pipeline is not easy to arrange, and the maintenance is not facilitated, therefore, the use environment of the conventional oil-cooled motor is limited to a certain extent.

Secondly, the cooling effect of the prior art is not ideal enough. Many oil-cooled motors adopt a single oil-cooled cooling mode, do not utilize the high specific heat capacity of water, and are cooled by combining oil cooling and water cooling; in addition, for example, in chinese patent CN201910499608.6, even though some oil-cooled motors incorporate a water cooling technique, since the oil passage is erected inside the housing cavity, the heat exchange efficiency between the cooling oil and the cooling water is low, and the improvement of the overall cooling effect is limited.

In view of this, how to design an oil-cooled motor, which can overcome the above-mentioned shortcomings of the prior art, is the subject of the present invention.

Disclosure of Invention

The utility model provides an oil-cooled motor, its purpose is to solve the complicated and not compact structure of current oil-cooled motor assembly oil pump to and the poor problem of cooling effect.

In order to achieve the above purpose, the utility model adopts the technical scheme that: an oil-cooled motor comprises a shell, an end cover, a stator core, a stator winding and a rotor core, wherein the stator core, the stator winding and the rotor core are arranged in the shell; the innovation lies in that: an oil inlet and an oil outlet are formed in the end part, facing the end cover, of the shell; an oil pump connecting area is arranged on the end cover; an oil inlet channel and an oil outlet channel are formed in the shell wall of the end cover, one end of the oil inlet channel is correspondingly communicated with the oil inlet, and the other end of the oil inlet channel extends into the pump connecting area to serve as an inlet of the oil inlet channel; one end of the oil outlet channel is correspondingly communicated with the oil outlet, and the other end of the oil outlet channel also extends into the pump connecting area to be used as an oil inlet channel outlet; the pump connection area is externally connected with an oil pump.

The relevant content in the above technical solution is explained as follows:

1. in the scheme, an oil duct is formed in the shell wall at the top of the shell along the axial direction of the motor, and the oil duct is communicated to a port on the end face, facing the end cover, of the shell and serves as the oil inlet; the oil duct is further provided with two downward oil passing branches, and the two oil passing branches are respectively located above two ends of the stator winding in the axial direction.

2. In the scheme, the oil passing branch is preferably a radial channel which is formed by machining and penetrates through the shell wall of the shell, and a sealing plug is plugged at the upper end of the radial channel for sealing, so that the method is convenient and fast, and the cost is low.

3. In this scheme, the chassis bottom has still seted up the oil storage tank, this oil storage tank intercommunication the cavity of casing, and the oil storage tank leads to the port on the terminal surface of casing towards the end cover and serves as the oil-out.

4. In the scheme, a cooling water channel is further arranged in the shell wall of the shell of the oil-cooled motor, and the cooling water channel is arranged close to the oil duct and the oil storage tank. Preferably, the cooling water channel is arranged circumferentially around the electric machine.

5. In this aspect, preferably, the distance from the oil passage to the axis of the casing is greater than the distance from the cooling water channel to the axis of the casing; the distance between the oil storage tank and the axis of the machine shell is also larger than the distance between the cooling water channel and the axis of the machine shell in the same axial plane. The layer of the cooling water channel is respectively positioned between the casing cavity and the cooling oil channel, so that the comprehensive heat exchange efficiency of the cooling oil and the cooling water is improved.

The utility model discloses a design principle and beneficial effect are:

firstly, an oil inlet channel and an oil outlet channel are embedded in an end cover, and the oil circuit in the shell and the pipeline embedded in the end cover can be in sealed connection in the assembling state of the end cover and the shell. Meanwhile, the oil-cooled motor is provided with a special oil pump connection area on the end cover, and the oil inlet channel inlet and the oil outlet channel outlet are integrated in the oil pump connection area, so that the corresponding oil pump can be directly installed on the oil pump connection area without an extra pipeline and too many interfaces.

By adopting the design, on one hand, the oil-cooled motor can be more compact in structure matched with an oil pump, the space utilization rate is higher, the space arrangement is more flexible, and the oil-cooled motor is suitable for application occasions with high requirements on the space arrangement, such as automobile driving motors and the like; on the other hand, by reducing the use of accessories, the failure risks of oil leakage and the like caused by loosening and aging of the accessories can be reduced, and the stability is improved and the maintenance cost is reduced.

Secondly, the utility model discloses set up oil duct and oil storage tank embedding in motor housing, the inside oil circuit of casing need not additionally increase oil pipe and joint, also need not use the oil pipe support. The design is beneficial to the compactness of the motor structure and has various advantages of saving accessories, and the structure without the oil pipe can well spray oil even if the motor is in a strong vibration working condition.

Furthermore, the utility model discloses an oil duct easily processes, but the casting is do to machining. Particularly, two channels can be directly formed at proper positions of the oil duct through machining, the upper ends of the channels are plugged by sealing plugs, and the oil passing branch can be formed.

Additionally, the utility model discloses a mode that the motor adopted oil cooling and water-cooling to combine together can improve the cooling effect greatly. Furthermore, in the machine shell, the cooling water channel and the cooling oil channel are designed in a layered mode, wherein the cooling water channel is arranged between the machine shell cavity and the cooling oil channel in a layered mode, and comprehensive heat exchange efficiency of cooling oil and cooling water is improved.

Drawings

FIG. 1 is a three-dimensional cross-sectional view of the oil-cooled motor of the present invention;

FIG. 2 is a cross-sectional view of the oil-cooled motor of the present invention along the axial direction in the vertical direction;

FIG. 3 is a schematic view of a three-dimensional structure of the end cap of the present invention;

fig. 4 is a three-dimensional cross-sectional view of the middle end cap of the present invention.

In the above drawings: in the above drawings: 1. a housing; 101. an oil passage; 102. an oil inlet; 103. an oil passing branch; 104. an oil storage tank; 105. an oil outlet; 2. an end cap; 201. an oil inlet channel; 2011. an inlet of an oil inlet channel; 2012. an oil inlet channel outlet; 202. an oil outlet channel; 2021. an oil outlet channel inlet; 2022. an outlet of the oil outlet channel; 203. an oil pump connection area; 3. an oil pump; 4. a stator winding; 5. an oil injection ring; 6. a cooling water channel; 7. and (6) sealing the plug.

Detailed Description

The invention will be further described with reference to the following drawings and examples:

example (b): oil-cooled motor

Referring to fig. 1 to 4, an oil-cooled motor includes a housing 1, an end cover 2, and a stator core, a stator winding 4 and a rotor core disposed inside the housing 1; the method is characterized in that: an oil inlet 102 and an oil outlet 105 are formed in the end part, facing the end cover 2, of the machine shell 1; an oil pump connecting area 203 is arranged on the end cover 2; an oil inlet channel 201 and an oil outlet channel 202 are formed in the shell wall of the end cover 2, one end of the oil inlet channel 201 is correspondingly communicated with the oil inlet 102 to serve as an oil inlet channel outlet 2012, and the other end of the oil inlet channel 201 extends into the pump connecting area 203 to serve as an oil inlet channel inlet 2011; one end of the oil outlet passage 202 is correspondingly communicated with the oil outlet 105 to be used as an oil outlet passage inlet 2021, and the other end of the oil outlet passage also extends into the pump connecting area 203 to be used as an oil inlet passage outlet 2022; the pump connection region 203 is provided externally with an oil pump 3.

As shown in fig. 2, an oil passage 101 is formed in the shell wall at the top of the machine shell 1 along the axial direction of the motor, and the oil passage 101 leads to a port on the end face of the machine shell 1 facing the end cover 2 and serves as the oil inlet 102; the oil duct 101 is further provided with two downward oil passing branches 103, and the two oil passing branches 103 are respectively located above two ends of the stator winding 4 in the axial direction.

As shown in fig. 1 and 2, the oil passing branch 103 is a radial channel formed by machining and penetrating through the wall of the casing 1, and is closed by plugging a sealing plug 7 at the upper end of the radial channel.

As shown in fig. 1 and fig. 2, an oil storage tank 104 is further opened at the bottom of the casing 1, the oil storage tank 104 is communicated with the cavity of the casing 1, and the oil storage tank 104 is communicated to a port on the end surface of the casing 1 facing the end cover 2 to serve as the oil outlet 105.

As shown in fig. 1 and 2, a cooling water channel 6 is further provided in the casing wall of the housing 1 of the oil-cooled motor, and the cooling water channel 6 is disposed close to the oil channel 101 and the oil storage tank 104. The cooling water channel 6 is arranged around the circumference of the motor.

As shown in fig. 2, a distance a from the oil passage 101 to the axis of the casing 1 is greater than a distance B from the cooling water passage 6 to the axis of the casing 1; the distance C between the oil storage tank 104 and the axis of the casing 1 is also greater than the distance B between the cooling water channel 6 and the axis of the casing 1 in the same axial plane.

In the present embodiment, as shown in fig. 1 and 2, two oil passing branches 103 respectively inject oil to two axial ends of the stator winding 4 through two oil injection rings 5. In this embodiment, two oil passing passages leading to the oil storage tank 104 are respectively opened below the two oil injection rings 5, and the two oil passing passages can enable cooling oil in the casing 1 to enter the oil storage tank 104.

In addition, in the present embodiment, the oil pump connection region 203 is a flange connection region of the oil pump 3.

Other embodiments and structural changes of the present invention are described below as follows:

1. in the above embodiment, an oil passage is provided, which corresponds to an oil inlet passage on the end cover; an oil storage tank is arranged and corresponds to an oil outlet channel on the end cover. However, the number of the oil passages and the number of the oil storage tanks in the present invention are not limited thereto. As would be readily understood and accepted by those skilled in the art.

2. In the above embodiment, the oil pump connection area is disposed at the top of the end cover, and the oil pump is installed on the surface of the end cover facing one side of the casing, but the present invention is not limited thereto. The position of the oil pump connecting area on the end cover is not limited; the oil pump mounting surface can also be the surface of the end cover opposite to the shell. As would be readily understood and accepted by those skilled in the art.

3. The utility model discloses do not do the restriction to the structure of oil feed way and oil outlet, the oil feed way or the oil outlet structure of linear type, curve type, screw-tupe or the type of turning back are all in the utility model discloses an in the protection range, this is that technical staff in the field understands easily and accepts.

4. In the above embodiment, the oil spout ring oil spout of the oil spout hole is adopted, but the oil spout device of the present invention is not limited thereto. The technical solutions adopted in other fuel injection devices applicable to the present invention are also within the scope of the present invention, which is easily understood and accepted by those skilled in the art.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. An oil-cooled motor comprises a machine shell (1), an end cover (2), a stator core, a stator winding (4) and a rotor core, wherein the stator core, the stator winding and the rotor core are arranged in the machine shell (1); the method is characterized in that: an oil inlet (102) and an oil outlet (105) are formed in the end part, facing the end cover (2), of the machine shell (1); an oil pump connecting area (203) is arranged on the end cover (2); an oil inlet channel (201) and an oil outlet channel (202) are formed in the shell wall of the end cover (2), one end of the oil inlet channel (201) is correspondingly communicated with the oil inlet (102), and the other end of the oil inlet channel extends into the pump connecting area (203) to be used as an oil inlet channel inlet (2011); one end of the oil outlet channel (202) is correspondingly communicated with the oil outlet (105), and the other end of the oil outlet channel also extends into the pump connecting area (203) to be used as an oil inlet channel outlet (2022); the pump connection region (203) is provided for an external oil pump (3).

2. The oil-cooled motor of claim 1, wherein: an oil duct (101) is formed in the shell wall at the top of the shell (1) along the axial direction of the motor, and the oil duct (101) is communicated to a port on the end face, facing the end cover (2), of the shell (1) and serves as the oil inlet (102); the oil duct (101) is further provided with two downward oil passing branches (103), and the two oil passing branches (103) are respectively located above two ends of the stator winding (4) in the axial direction.

3. The oil-cooled motor of claim 2, wherein: the oil passing branch (103) is a radial channel which is formed by machining and penetrates through the shell wall of the shell (1), and a sealing plug (7) is plugged at the upper end of the radial channel for sealing.

4. The oil-cooled motor of claim 2, wherein: an oil storage tank (104) is further formed in the bottom of the machine shell (1), the oil storage tank (104) is communicated with the cavity of the machine shell (1), and a port, which is communicated to the end face, facing the end cover (2), of the machine shell (1), of the oil storage tank (104) serves as the oil outlet (105).

5. The oil-cooled motor of claim 4, wherein: and a cooling water channel (6) is also arranged in the shell wall of the shell (1) of the oil-cooled motor, and the cooling water channel (6) is arranged close to the oil channel (101) and the oil storage tank (104).

6. The oil-cooled motor of claim 5, wherein: the cooling water channel (6) is arranged around the circumference of the motor.

7. The oil-cooled motor of claim 5, wherein: the distance (A) from the oil channel (101) to the axis of the machine shell (1) is greater than the distance (B) from the cooling water channel (6) to the axis of the machine shell (1); the distance (C) between the oil storage tank (104) and the axis of the machine shell (1) is also larger than the distance (B) between the cooling water channel (6) and the axis of the machine shell (1) in the same axial plane.