CN205791955U - Electric machine casing - Google Patents

Abstract

This utility model relates to the technical field of motor cooling, is specifically related to a kind of electric machine casing；Including the first housing being sequentially connected from the inside to the outside and the second housing；Being provided with coolant chamber between described first housing and described second housing, the outer surface of described first housing is provided with spiral type fin, and described coolant chamber is separated into spiral cooling passage by described spiral type fin；Described second housing is provided with inlet and liquid outlet, described inlet and the described liquid outlet two ends respectively with described cooling passage and connects；Using the electric machine casing of technical solutions of the utility model, the cooling circuit flow resistance of motor is little, even flow field, is not likely to produce whirlpool, and cooling effect of motor is good.

Description

Motor housing

technical field

The utility model relates to the technical field of motor cooling, in particular to a motor casing.

Background technique

In new energy vehicles and hybrid vehicles, the drive motor or integrated starter generator used is one of the core components of the vehicle. During use, the temperature of the motor will gradually increase, and the working environment temperature of the motor will affect the temperature of the motor. Performance and life have a great influence, therefore, it is very necessary to cool the motor.

The cooling methods in the prior art include water cooling and air cooling. The air cooling method is suitable for small-power motors. Because high-power motors have high cooling requirements, the cooling capacity of the air-cooling method is relatively poor and cannot meet the needs of high-power motors. , when the motor works in an environment with poor cooling capacity, the efficiency and life of the motor will be reduced. At the same time, the overheating of the motor will cause local expansion, resulting in increased structural gaps, reduced structural strength, and increased motor noise during high-speed operation. The water-cooling method has better heat dissipation capability than the air-cooling method. Therefore, the water-cooling method is usually selected for high-power motors. At present, for high-power drive motors or integrated starter generators, generally a The cooling water channel, in order to improve the heat exchange time between the motor housing and the cooling liquid, the cooling water channel is usually connected by multiple transverse and longitudinal ribs along the circumference of the motor housing, so that Irregular-shaped coolant channels are formed. However, the coolant does not flow smoothly in the irregular-shaped cooling circuit, the flow resistance is large, the flow field is uneven, and vortices are likely to be generated, thereby affecting the cooling effect of the motor.

Utility model content

The purpose of the utility model is to provide a motor casing to overcome the problems of large flow resistance, uneven flow field and easy generation of eddies in the cooling circuit of the motor in the prior art, thereby affecting the cooling effect of the motor.

In order to achieve the above object, the utility model provides a motor housing, which includes a first housing and a second housing connected sequentially from the inside to the outside; the first housing and the second housing are provided with There is a cooling liquid chamber, and the outer surface of the first housing is provided with a spiral rib, and the spiral rib divides the cooling liquid chamber into a spiral cooling liquid channel; the second housing A liquid inlet and a liquid outlet are provided on the top, and the liquid inlet and the liquid outlet communicate with the two ends of the cooling liquid channel respectively.

As a preferred solution, in order to facilitate the installation and detachment of the first housing and the second housing and make the use more convenient, the first housing and the second housing are detachably connected.

As a preferred solution, in order to further facilitate the circulation of the cooling liquid in the cooling liquid channel and avoid cross-flow of the cooling liquid in the cooling liquid chamber, the radial width of the spiral convex rib is equal to the height of the cooling liquid chamber.

As a preferred solution, in order to further facilitate the clamping of the second housing and the first housing, a front end cover is also provided at one end of the first housing, and the front end cover is connected to the first housing, the second housing, and the first housing. The two shells are snapped together.

As a preferred solution, in order to play a sealing role at the connection between the front end cover and the first casing and the second casing, a sealing ring is provided at the clamping joint between the front end cover and the first casing and the second casing.

As a preferred solution, considering the convenience of connection and the tightness of the connection between the first housing, the second housing and the front end cover, one end of the first housing is provided with a first tongue and groove, and the other end is provided with a second groove. A tenon and a second tenon, and the corresponding front cover is provided with a third tenon, a second tenon and a fourth tenon in turn from outside to inside; one end of the second housing is connected to the first tenon The other end is connected to the third mortise; the second mortise is connected to the second mortise, and the first mortise is connected to the fourth mortise.

As a preferred solution, considering the uniformity of the flow field, in the axial direction of the first casing, the distances between adjacent convex ribs are equal.

As a preferred solution, in order to increase the heat exchange time between the motor casing and the cooling liquid, increase the heat dissipation capacity, and further improve the cooling effect, a plurality of spoiler columns are arranged in the cooling liquid channel.

As a preferred solution, in order to improve the heat exchange time between the motor housing and the cooling liquid, and at the same time make the flow field uniform and avoid eddies, a plurality of the spoiler columns are evenly distributed in the cooling liquid channel.

As a preferred solution, considering the stability of the connection of the spoiler column and the convenience of reducing the flow rate of the coolant, the spoiler column is fixed on the first casing and is perpendicular to the axial direction of the first casing.

The motor housing provided by the utility model has the following technical effects: by setting a cooling liquid chamber between the first housing and the second housing, the second housing is provided with a liquid inlet and an outlet The liquid port, the liquid inlet and the liquid outlet are respectively connected to the two ends of the cooling liquid channel, the structure is simple and easy to realize, and by setting the spiral convex rib, the spiral convex rib separates the cooling liquid chamber into a complete spiral The cooling liquid channel allows the cooling liquid to flow continuously along the circumference of the motor housing, so that the cooling circuit has less bending, small flow resistance, uniform flow field, and good cooling effect of the motor, which overcomes the cooling liquid circulation in the prior art Unsmooth, large flow resistance, uneven flow field, easy to produce technical problems of vortex.

Description of drawings

Fig. 1 is the sectional view of the first housing of the motor housing of the embodiment of the present utility model;

Fig. 2 is the sectional view of the motor casing of the embodiment of the present utility model;

Fig. 3 is a perspective view of the first casing of the motor casing according to the embodiment of the present invention.

In the figure: 1-motor housing, 11-first housing, 111-spiral rib, 112-spoiler column, 113-first mortise, 114-second mortise, 115-first tenon, 12-second shell, 121-liquid inlet, 122-liquid outlet, 13-front cover, 131-second tenon, 132-fourth tenon, 133-third tenon, 14-sealing ring, 15 - Coolant channels.

detailed description

Below in conjunction with accompanying drawing and embodiment the technical scheme of the utility model is further described:

As shown in Figures 1-3: the utility model provides a motor housing 1, which includes a first housing 11 and a second housing 12 connected sequentially from inside to outside; the first housing 11 and the second housing A coolant chamber is provided between the bodies 12, and the outer surface of the first shell 11 is provided with a spiral rib 111 to divide the coolant chamber into a spiral coolant channel 15; the second shell 12 is provided with an inlet The liquid port 121 and the liquid outlet port 122 , the liquid inlet port 121 and the liquid outlet port 122 communicate with the two ends of the cooling liquid channel 15 respectively. A cooling liquid chamber is provided between the first housing 11 and the second housing 12, and a spiral rib 111 is arranged in the cooling liquid chamber, and the spiral rib 111 divides the cooling liquid chamber into a spiral cooling liquid channel 15. The structure is simple and easy to implement, and through a complete spiral coolant channel, the coolant can flow continuously along the circumference of the motor casing, so that the bending of the cooling circuit is less and the bending of the cooling circuit Less, small flow resistance, uniform flow field, and good cooling effect of the motor.

Specifically, referring to FIG. 1 and FIG. 2 , the first housing 11 and the second housing 12 are detachably connected, which facilitates the installation and disassembly of the first housing 11 and the second housing 12 , and is more convenient to use. In addition, one side end of the first housing 11 is also provided with a front end cover 13, and the front end cover 13 is engaged with the first housing 11 and the second housing 12, further facilitating the connection of the second housing 12 and the first housing. 11 snap tight. In addition, a sealing ring 14 may also be provided at the joint between the front end cover 13 and the first housing 11 and the second housing 12, so as to play a role in the connection between the front end cover 13 and the first housing 11 and the second housing 12. Sealing effect. Specifically, one end of the first shell 11 is provided with a first tenon 113, the other end is provided with a first tenon 115 and a second tenon 114, and the corresponding front end cover 13 is provided with a third tenon sequentially from outside to inside. Groove 133, second tenon 131 and fourth tenon groove 132; one end of the second housing 12 is connected with the first tenon groove 113, and the other end is connected with the third tenon groove 133, so that the first tenon groove 113 and the third tenon groove 133 plays a limiting role on the second shell 12. In addition, the two ends of the second shell 12 can also be chamfered to facilitate connection with the first shell 11; the second tenon 114 is connected with the second tenon 131, The first tenon 115 is connected to the fourth tenon 132, because the second tenon 114 and the first tenon 115 of the first housing 11 cooperate with the second tenon 131 and the fourth tenon 132 of the front cover 13 respectively, further play a role The position-limiting effect makes the connection between the first casing 11, the second casing 12 and the front end cover 13 convenient and tighter. It is worth noting that, in this embodiment, the first tenon 113 , the first tenon 115 , and the second tenon 114 are distributed along the circumferential direction of the first housing 11 , and the second tenon 131 , the third tenon 133 , the second The four mortise grooves 132 are all distributed along the circumferential direction of the front end cover 13 .

Specifically, referring to FIG. 2 and FIG. 3 , the radial width of the spiral rib 111 is equal to the height of the coolant chamber, that is, one end of the spiral rib 111 is connected to the outer surface of the first housing 11, and the other end is against the outer surface of the first housing 11. Leaning against the inner surface of the second shell 12, it is worth noting that the radial width of the spiral rib 111 refers to the width of the spiral rib 111 extending radially along the first shell 11, and the coolant chamber The height of is the distance between the outer surface of the first casing 11 and the inner surface of the second casing 12 . This further facilitates the circulation of the cooling liquid in the cooling liquid channel 15 and prevents the cooling liquid from cross-flowing in the cooling liquid chamber, and at the same time helps to increase the heat exchange time between the cooling liquid and the casing, thereby further improving the cooling effect. In addition, considering the stability of the connection between the spiral convex rib 111 and the first housing 11 and the high overall strength of the spiral convex rib 111, the spiral convex rib 111 plays a good role in blocking the cooling liquid, thereby facilitating the cooling of the cooling liquid. The spiral cooling liquid channel 15 circulates, and the spiral convex rib 111 is integrally formed with the first casing 11 . In addition, in the axial direction of the first housing 11 , the spacing between adjacent convex ribs is equal, which contributes to the uniformity of the flow field.

In addition, as shown in FIG. 3 , a plurality of spoiler columns 112 may be provided in the cooling liquid passage 15 to increase the heat exchange time between the motor housing and the cooling liquid, increase the heat dissipation capacity, and further improve the cooling effect. In addition, in order to increase the heat exchange time between the motor housing and the cooling liquid, and at the same time make the flow field uniform and avoid eddies, a plurality of spoiler columns 112 are evenly distributed in the cooling liquid passage. It is worth noting that the spoiler post 112 can be fixed with the first casing 11 or with the second casing 12. The axial direction of a casing 11 is vertical, which facilitates the setting of the spoiler column 112, makes the connection of the spoiler column 112 more stable, and facilitates the reduction of the flow rate of the coolant. In addition, the spoiler column 112 is preferably arranged perpendicular to the axial direction of the first casing 11, so as to make the flow field more uniform.

The motor casing adopting the technical solution of the utility model has a simple structure and is easy to realize, and the cooling liquid chamber is divided into a complete spiral cooling liquid passage 15 by setting a spiral convex rib 111, so that the cooling liquid can flow along the The circumferential continuous flow of the motor shell makes the cooling circuit less bent, the flow resistance is small, the flow field is uniform, and the cooling effect of the motor is good, which overcomes the existing technology of large flow resistance, uneven flow field, and easy vortex generation question.

The above description is only the preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the utility model, some improvements and replacements can also be made. And replacement should also be regarded as the protection scope of the present utility model.

Claims (10)

1. an electric machine casing, it is characterised in that: include first be sequentially connected from the inside to the outside Housing and the second housing；It is provided with cooling sap cavity between described first housing and described second housing Room, the outer surface of described first housing is provided with spiral type fin, and described spiral type fin is by described Coolant chamber is separated into spiral cooling passage；

Described second housing is provided with inlet and liquid outlet, described inlet and described liquid outlet Two ends with described cooling passage connect respectively.

Electric machine casing the most according to claim 1, it is characterised in that: described first shell Body removably connects with described second housing.

Electric machine casing the most according to claim 1, it is characterised in that: described spiral type The radial width of fin is equal with the height of described coolant chamber.

4. according to the electric machine casing described in any one of claim 1-3, it is characterised in that: institute State a side end of the first housing and be additionally provided with drive end bearing bracket, described drive end bearing bracket and described first housing, Second housing clamping.

Electric machine casing the most according to claim 4, it is characterised in that: described drive end bearing bracket It is provided with sealing ring with described first housing, the second housing access section.

Electric machine casing the most according to claim 4, it is characterised in that: described first shell One end of body is provided with the first tongue-and-groove, and the other end is provided with the first tenon and the second tongue-and-groove, correspondence The 3rd tongue-and-groove, the second tenon and the 4th tongue-and-groove it is sequentially provided with from outside to inside on described drive end bearing bracket；

One end of described second housing is connected with described first tongue-and-groove, the other end and described 3rd tenon Groove connects；Described second tongue-and-groove and the second tenon are connected, described first tenon and described 4th tenon Groove is connected.

7. according to the electric machine casing described in any one of claim 1-3, it is characterised in that: On the axial direction of the first housing, the adjacent spacing between fin is equal.

8. according to the electric machine casing described in any one of claim 1-3, it is characterised in that: institute Multiple turbulence columns it is provided with in stating cooling passage.

Electric machine casing the most according to claim 8, it is characterised in that: multiple is described Turbulence columns is distributed in described cooling passage.

Electric machine casing the most according to claim 9, it is characterised in that: described turbulence columns It is fixed on described first housing and perpendicular with the axial direction of described first housing.