CN105990946B - Motor casing assembly with double cooling flow channels - Google Patents

Abstract

A motor housing assembly with dual cooling channels, comprising: a housing in a cylindrical shape, with two symmetrical cooling channels formed on the outer surface of the housing, the cooling channels extending from the front end to the rear end of the outer surface of the housing, and having an inlet end and an outlet end, wherein the inlet end of one cooling channel is close to the front end of the housing, and the outlet end is close to the rear end of the housing, and the inlet end of the other cooling channel is close to the rear end of the housing, and the outlet end is close to the front end of the housing; a front cover plate arranged at the front end of the housing; and a rear cover plate arranged at the rear end of the housing. The two cooling channels allow cooling fluid to enter from the front end and the rear end of the housing respectively, so as to achieve the effect of uniformly cooling the heat-generating parts in the motor housing assembly.

Description

Motor housing assembly with dual cooling runners

technical field

The present invention relates to a casing assembly, in particular to a motor casing assembly with dual cooling channels.

Background technique

Electric motors are commonly used devices that can be used as motors to output power, or as generators to provide electricity through other energy conversion methods. As the motor application efficiency improves, its size shrinks, but the thermal power density also increases. Therefore, the requirements for the cooling capacity of the motor are also relatively increased. Whether the motor can be well cooled to maintain the normal working temperature is directly related to the heat dissipation arrangement of the motor. Generally speaking, the operation design of different motors will cause motor losses in the stator group and rotor group. The motor rotor loss will be converted into heat, and the heat generated will be transferred to the bearing. The bearing itself is also affected by the high speed of the rotating shaft. And frictional heat is generated, too much frictional heat will make the bearing temperature too high and damage, causing the problem of motor vibration and even damage.

Under the design conditions that allow continuous operation of the motor, the service life of the motor will be reduced by half for every 10°C increase in the temperature of the copper wire windings in the stator group. The insulating varnish coated on the copper wire is prone to embrittlement and cracking due to thermal stress and thermal fatigue caused by high temperature.

In order to avoid the shortening or damage of motor parts due to high temperature, cooling channels are usually installed on the motor, and cooling fluid is introduced into the cooling channels to cool down the motor. The excellent arrangement of cooling flow channels can improve the efficiency, performance and life of the motor, but overly complex flow channels will increase the difficulty of manufacturing and increase the cost, which is not in line with benefits.

Most of the existing motor cooling runner arrangements are only suitable for specific types of motors. For example, the applications of cavity runners are mainly used to cool smaller motors, while they are applied to large motors. It is easy to cause hot spots due to the recirculation area formed by the fluid, so that the local temperature of the motor is too high. In the case of poor cooling conditions, the chance of nucleate boiling in such a cavity flow channel is increased. The phase change caused by nucleate boiling will cause the motor to produce gas explosion, water leakage, fatigue, etc., resulting in the danger of motor application. also increased. In addition, there are also applications of spiral flow channels. This kind of cooling flow channel is generally used in the cooling of motors. The spiral flow channel adopts a cooling layout with an inflow hole and an outflow hole. The cooling fluid flows from one end of the motor through the inflow. The hole enters the spiral cooling channel, and the other end of the motor leaves the cooling channel through the outlet hole, and at the same time takes away the high heat on the motor, thereby achieving the cooling effect. However, when the cooling fluid flows in the cooling channel, it will absorb heat and gradually increase its temperature. When the cooling fluid reaches the outflow hole, the temperature is higher than the temperature before the cooling fluid has entered the cooling channel. Therefore, it is close to the outflow hole. The cooling effect obtained by the motor parts is far less than the cooling effect of the motor parts close to the inlet holes. If the size and length of the motor are too large, the problem of uneven cooling of the front and rear stator windings of the motor is aggravated by the spiral flow channel.

SUMMARY OF THE INVENTION

In view of the disadvantage that the traditional motor cooling channel only allows cooling fluid to enter from one end of the motor, resulting in poor cooling effect at the other end of the motor, the inventor has improved the shortcomings and deficiencies, and then created a motor with dual cooling channels housing assembly.

The purpose of the present invention is to provide a motor casing assembly with dual cooling channels, wherein the two cooling channels allow cooling fluid to enter from two ends of the casing assembly, and then leave from both ends of the casing assembly, so the casing Each end of the assembly can receive a cooling fluid with a lower temperature that has not exchanged heat with the heat source of the motor stator group, so as to achieve a uniform cooling effect.

In order to achieve the above purpose, the aforementioned motor housing assembly with dual cooling channels includes:

A shell, which is cylindrical, and formed on the outer surface of the shell with two cooling channels that are symmetrical and independent of each other but not communicated with each other. The front end extends to the rear end of the outer surface of the shell, each cooling channel has an inlet end, an outlet end, and a plurality of sections parallel to each other, wherein the inlet end of a cooling channel is close to the front end of the shell and the outlet end is close to the rear of the shell The inlet end of the other cooling channel is close to the rear end of the casing and the outlet end is close to the front end of the casing. The inlet ends of the cooling flow channels that are symmetrical and independent of each other are communicated;

An outer sleeve, which is cylindrical, is sleeved on the casing and covers the two cooling channels that are symmetrical and independent of each other and are not connected to each other. A front outflow pipe and a rear outlet are arranged on the outer sleeve. an outflow pipe, the front outflow pipe and the rear outflow pipe are respectively communicated with the two outlet ends of the cooling flow channels that are symmetrical and independent from each other;

A front cover plate, which is arranged at the front end of the casing, a forward flow pipe is arranged on the front cover plate that communicates with the inlet end of one of the cooling channels of the casing, and a top end of the front cover plate is formed with a A front through hole communicated with the forward flow pipe, a front cooling channel communicated with the forward flow pipe is formed on the outer side of the front cover plate, the front cooling channel is connected with the inlet end of one of the cooling flow channels through one of the communication holes of the casing connected;

A front channel gland is detachably disposed on the front cover plate and covers the front cooling channel, an L-shaped channel is formed on the front channel gland, the L-shaped channel on the front channel gland and the front through hole and The front cooling channel is connected;

A rear cover plate, which is arranged at the rear end of the casing, and a rear inlet pipe that communicates with the inlet end of another cooling flow channel of the casing is arranged on the rear cover plate, and a top end of the rear cover plate is formed with a The rear through hole communicated with the rear inlet pipe, the outer side of the rear cover plate is formed with a rear cooling channel that communicates with the rear inlet pipe, the rear cooling channel is connected to the inlet end of the other cooling channel through another communication hole of the shell connected; and

A rear channel gland is detachably disposed on the rear cover plate and covers the rear cooling channel, an L-shaped channel is formed on the rear channel gland, the L-shaped channel on the rear channel gland and the rear through hole and the rear The cooling channels are connected.

The front cooling channel of the front cover is roughly O-shaped; the rear cooling channel of the rear cover is roughly O-shaped.

A front axle hole is formed axially through the front cover plate; a rear axle hole is formed axially through the rear cover plate; a front assembly hole is formed axially through the front channel gland; and the rear channel A rear assembly hole is formed axially through the gland.

Through the above technical means, the housing of the motor housing assembly of the present invention has two cooling channels, one of which is connected with the forward flow pipe and the rear outlet pipe, and the other cooling flow channel is connected with the rear inlet pipe and the front outlet. The pipes are connected. When cooling, two cooling fluids can be input into the forward flow pipe and the rear inlet pipe respectively. The two cooling fluids enter the two cooling channels from the front and rear of the casing respectively, and finally separate from the rear. The outflow pipe and the front outflow pipe flow out of the casing. As a result, two cooling fluids can enter from the front end and the rear end of the motor housing assembly at the same time, and are cooled at the same time. The copper wire windings, stator silicon steel sheets, rotating shafts, bearings and other parts at the front and rear ends of the housing assembly can get a good cooling effect, avoiding the problem that one end of the motor contacts the cooling fluid that has been heated and reduces the cooling efficiency.

Description of drawings

The following drawings are only intended to illustrate and explain the present invention schematically, and do not limit the scope of the present invention. in,

FIG. 1 is a three-dimensional appearance view of the present invention applied to a motor.

FIG. 2 is a front view of the present invention applied to a motor.

3 is a bottom cross-sectional view of the present invention applied to a motor.

FIG. 4 is a side cross-sectional view of the present invention applied to a motor.

FIG. 5 is another side cross-sectional view of the present invention applied to a motor.

FIG. 6 is a perspective appearance view of the casing of the present invention.

FIG. 7 is a top view of the housing of the present invention.

8 is an exploded perspective view of the front cover plate and the front channel gland according to the present invention.

Fig. 9 is a side view of the front cover plate and the front channel gland of the present invention.

FIG. 10 is an exploded perspective view of the rear cover plate and the rear channel gland according to the present invention.

FIG. 11 is a side view of the rear cover plate and the rear channel gland according to the present invention.

FIG. 12 is a schematic diagram of a flow channel developed according to the first embodiment of the present invention.

FIG. 13 is a three-dimensional schematic diagram of a flow channel according to the first embodiment of the present invention.

FIG. 14 is a schematic diagram illustrating the development of the flow channel according to the second embodiment of the present invention.

FIG. 15 is a three-dimensional schematic diagram of a flow channel according to the second embodiment of the present invention.

Description of reference numbers:

10 shell 100 cooling channel

101 Inlet port 102 Outlet port

105 Connecting holes

20 Outer casing 22a Rear outlet pipe

22b front outlet pipe

30 Front cover 300 Front cooling channel

301 Front through hole 31 Front flow pipe

35 front axle hole

40 rear cover plate 400 rear cooling channel

401 rear through hole 41 rear inlet pipe

45 rear axle hole

50 front channel gland 500L channel

55 Front Assembly Holes

60 rear channel gland 600L channel

65 rear assembly holes

90 Motor Module 91 Copper Wire Winding

92 stator silicon steel sheet group 93 squirrel cage winding

94 rotor silicon steel sheet group 95 shaft

Detailed ways

Referring to FIGS. 1 to 3 , the first embodiment of the motor housing assembly with dual cooling channels 100 of the present invention can be combined with a motor module 90 to form a motor. The motor module 90 has a copper wire winding 91 , a stator silicon steel sheet group 92 , a squirrel cage winding 93 , a rotor silicon steel sheet group 94 and a rotating shaft 95 . The copper wire winding 91 is fixed on the stator silicon steel sheet group 92 , the squirrel cage winding 93 is fixed on the rotor silicon steel sheet group 94 , and the rotating shaft 95 is arranged in the rotor silicon steel sheet group 94 .

Referring further to FIG. 4 , the first embodiment of the motor housing assembly with dual cooling channels 100 according to the present invention accommodates the motor module 90 and includes: a casing 10 , an outer casing 20 , a front cover 30 , a front The channel gland 50 , a rear cover plate 40 and a rear channel gland 60 .

Please further refer to FIGS. 6 , 12 and 13 , the casing 10 is cylindrical and can accommodate the motor module 90 , and two symmetrical cooling channels 100 are formed on the outer surface of the casing 10 . Each cooling channel 100 is generally serpentine, and the cooling channel 100 extends from the front end to the rear end of the outer surface of the housing 10 , and has an inlet end 101 , an outlet end 102 , and a plurality of mutually parallel sections . The inlet end 101 of one cooling channel 100 is close to the front end of the casing 10, and the outlet end 102 is close to the rear end of the casing 10, and the inlet end 101 of the other cooling channel 100 is close to the rear end of the casing 10, and the outlet end 102 is close to the casing The front end of the body 10. In addition, a communication hole 105 is respectively formed through the front end and the rear end of the casing 10 to communicate with the two inlet ends 101 of the two cooling channels 100 respectively. Furthermore, the two cooling channels 100 of the casing 10 are independent of each other and not communicated with each other. In addition, the cross section of each cooling channel 100 may be circular, square, rectangular, or trapezoidal.

The outer casing 20 has a cylindrical shape, and is sleeved on the casing 10 and covers the two cooling channels 100 . The outer casing 20 is provided with the front outflow pipe 22b and a rear outflow pipe 22a to be respectively connected with the two cooling channels 100 . The two outlet ends 102 of the cooling channel 100 are communicated with each other.

Please further refer to FIGS. 7 , 8 and 9 , the front cover 30 is disposed at the front end of the casing 10 , and an inlet end 101 of one of the cooling channels 100 of the casing 10 is indirectly connected to the front cover 30 . open forward flow pipe 31. A front axle hole 35 is axially formed through the front cover plate 30 , and a bearing can be arranged in the front axle hole 35 for installing the rotating shaft 95 . In addition, the top of the front cover plate 30 is formed with a front through hole 301 that communicates with the forward flow pipe 31, and the outer side of the front cover plate 30 is formed with a front cooling channel 300 that communicates with the forward flow pipe 31 and is approximately O-shaped. The front cooling channel 300 communicates with the inlet end 101 of one of the cooling channels 100 through the communication hole 105 of the casing 10 .

The front channel gland 50 is detachably disposed on the front cover plate 30 and covers the front cooling channel 300. An L-shaped channel 500 is formed on the front channel gland 50 to communicate with the front through hole 301 and the front cooling channel 300. The channel 300 is connected. In addition, a front assembly hole 55 is formed axially through the front channel gland 50 for the rotation shaft 95 to pass through.

10 and FIG. 11 , the rear cover plate 40 is disposed at the rear end of the casing 10 , and an inlet end 101 of the other cooling channel 100 of the casing 10 is indirectly connected to the rear cover plate 40 . Rear inlet pipe 41 . A rear axle hole 45 is axially formed through the rear cover plate 40 , and a bearing can be arranged in the rear axle hole 45 for installing the rotating shaft 95 . In addition, the top of the rear cover plate 40 is formed with a rear through hole 401 that communicates with the rear inlet pipe 41, and the outer side of the rear cover plate 40 is formed with a rear cooling channel 400 that communicates with the rear inlet pipe 41 and is approximately O-shaped. The rear cooling channel 400 communicates with the inlet end 101 of the other cooling channel 100 through the other communication hole 105 of the casing 10 .

Please further refer to FIG. 5 , the rear channel cover 60 is detachably disposed on the rear cover plate 40 and covers the rear cooling channel 400 , and an L-shaped channel 600 is formed on the rear channel cover 60 to communicate with the rear The hole 401 communicates with the rear cooling channel 400 . In addition, a rear assembly hole 65 is formed axially through the rear channel gland 60 for the rotation shaft 95 to pass through.

The front cooling channel 300 of the front cover 30 is roughly O-shaped; the rear cooling channel 400 of the rear cover 40 is roughly O-shaped.

14 and FIG. 15 , the second embodiment of the motor housing assembly of the dual cooling channels 100 of the present invention is substantially the same as the first embodiment, except that the forward flow pipe 31 and the rear flow pipe 41 are disposed in the casing The sleeve 20 is not disposed on the front cover 30 and the rear cover 40 respectively, and the front cover 30 and the rear cover 40 do not have an O-shaped front cooling channel 300 and an O-shaped rear cooling channel 400 respectively.

Through the above-mentioned technical means, the present invention has the following advantages:

1. The housing 10 of the motor housing assembly of the present invention has two cooling channels 100, wherein one cooling channel 100 communicates with the forward flow tube 31 and the rear outlet tube 22a, and the other cooling channel 100 is connected with the rear inlet tube 41 Connected with the front outflow pipe 22b, when cooling, two cooling fluids can be input to the front inflow pipe 31 and the rear inflow pipe 41 respectively, and the two cooling fluids are injected from the front inflow pipe 31 and the rear inflow pipe 41 respectively, And the front and rear ends of the casing 10 enter the two cooling channels 100 respectively, and finally flow out of the casing 10 from the rear outflow pipe 22a and the front outflow pipe 22b, respectively, as shown in FIG. 12 and FIG. 13 or FIG. 14 and FIG. 15 shown. As a result, two cooling fluids can enter from the front end and the rear end of the motor housing assembly at the same time, and are cooled at the same time. The copper wire windings, stator silicon steel sheets, rotating shafts, bearings and other parts at the front and rear ends of the housing assembly can get a good cooling effect, avoiding the problem that one end of the motor contacts the cooling fluid that has been heated and reduces the cooling efficiency.

2. The cooling channel 100 of the present invention adopts a serpentine configuration and has a plurality of parallel sections, which can increase the area covered by the cooling fluid, and can extend to the two axial directions of the casing 10. Due to the manufacturing limitation of the pitch, there is an area not covered by the cooling fluid. The serpentine cooling channel 100 of the present invention can be easily applied to motors of different lengths or sizes, greatly improving the applicability of the motor housing assembly.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Those of ordinary knowledge, within the scope of the technical solution of the present invention, can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above. Any simple modifications, equivalent changes and modifications made to the above embodiments by the technical essence of the present invention still fall within the scope of the technical solutions of the present invention.

Claims (3)

1. A motor housing assembly with dual cooling flow paths, the motor housing assembly with dual cooling flow paths comprising:

a cylindrical shell, two symmetrical and independent but not connected cooling flow channels are formed on the outer surface of the shell, each cooling flow channel is snakelike and extends from the front end of the outer surface of the shell to the rear end of the outer surface of the shell, each cooling flow channel is provided with an inlet end, an outlet end and a plurality of mutually parallel sections, wherein the inlet end of one cooling flow channel is close to the front end of the shell, the outlet end of the other cooling flow channel is close to the rear end of the shell, the outlet end of the other cooling flow channel is close to the front end of the shell, a connecting hole is respectively formed at the front end and the rear end of the shell in a penetrating way, and the two connecting holes of the shell are respectively communicated with the inlet ends of the two symmetrical and independent but not connected cooling flow channels;

the shell sleeve is cylindrical, is sleeved on the shell and covers the two symmetrical and mutually independent and non-communicated cooling flow passages, and is provided with a front flow outlet pipe and a rear flow outlet pipe which are respectively communicated with two outlet ends of the two symmetrical and mutually independent and non-communicated cooling flow passages;

the front cover plate is arranged at the front end of the shell, a front flow pipe communicated with the inlet end of one cooling flow passage of the shell is arranged on the front cover plate, a front through hole communicated with the front flow pipe is formed at the top end of the front cover plate, a front cooling channel communicated with the front flow pipe is formed on the outer side surface of the front cover plate, and the front cooling channel is communicated with the inlet end of one cooling flow passage through one through hole of the shell;

the front channel gland is detachably arranged on the front cover plate and covers the front cooling channel, an L-shaped channel is formed on the front channel gland, and the L-shaped channel on the front channel gland is communicated with the front through hole and the front cooling channel;

the rear cover plate is arranged at the rear end of the shell, a rear flow pipe communicated with the inlet end of the other cooling flow channel of the shell is arranged on the rear cover plate, a rear through hole communicated with the rear flow pipe is formed at the top end of the rear cover plate, a rear cooling channel communicated with the rear flow pipe is formed on the outer side surface of the rear cover plate, and the rear cooling channel is communicated with the inlet end of the other cooling flow channel through another communication hole of the shell; and

a rear channel gland is detachably arranged on the rear cover plate and covers the rear cooling channel, an L-shaped channel is formed on the rear channel gland, and the L-shaped channel on the rear channel gland is communicated with the rear through hole and the rear cooling channel.

2. The motor case assembly with dual cooling flow paths of claim 1, wherein the front cooling channel of the front cover plate is O-shaped; the rear cooling channel of the rear cover plate is O-shaped.

3. The motor casing assembly with dual cooling channels of claim 2, wherein a front shaft hole is formed on the front cover plate in an axially penetrating manner; a rear axle hole is axially formed on the rear cover plate in a penetrating way; a front assembly hole is axially formed on the front channel press cover in a penetrating way; and a rear assembly hole is axially formed on the rear channel press cover in a penetrating manner.