TWI589104B - Motor housing assembly with dual cooling channels - Google Patents

Description

Motor housing assembly with dual cooling runners

The present invention relates to a housing assembly, and more particularly to a motor housing assembly having a dual cooling flow passage, wherein two cooling flow passages allow cooling fluid to enter from the two ends of the housing assembly, respectively, and then exit from both ends of the housing assembly, respectively. Therefore, each end of the outer casing assembly can receive a cooling fluid that has not been subjected to heat exchange with the heat source of the motor stator set and has a lower temperature to achieve a uniform cooling effect.

A motor is a commonly used device that can be used as a motor to output power or as a generator to provide power through other energy conversion methods. As the performance of the motor is increased, its size is reduced, but the heat power density is also increased. Therefore, the cooling capacity requirement of the motor is relatively increased, and whether the motor can be well cooled to maintain the normal operating temperature is directly related to the heat dissipation arrangement of the motor. In general, the operation design of different motors will cause motor loss in the stator and rotor groups. The rotor loss of the motor will be converted into heat, and the heat generated will be transmitted to the bearing. The bearing itself is also driven by the high speed of the shaft. Frictional heat is generated, and excessive frictional heat will cause the bearing temperature to be too high and damage, causing motor vibration or even damage.

Under the design conditions that allow continuous operation, the life of the copper wire winding in the stator group is reduced by half for every 10 °C. Insulating varnish coated on the outside of copper wire is prone to embrittlement and cracking due to thermal stress and thermal fatigue caused by high temperature.

In order to avoid the short-term or damage of the motor parts due to high temperature, a cooling flow path is usually arranged on the motor, and a cooling fluid is introduced into the cooling flow path to cool the motor. Excellent cooling The arrangement of the flow channels can improve the efficiency, performance and life of the motor, but the excessively complicated flow path makes the difficulty of manufacturing increase and the cost increases, which is not in line with the benefits.

Most of the existing motor cooling runner arrangements are only suitable for a specific type of motor. For example, the application of the cavity flow channel is mainly based on cooling a smaller motor, and is applied to a large motor, because of the increase in heat generation, the cooling situation is easy. Because the recirculation zone formed by the fluid causes a hot spot, the motor generates an excessive temperature at this part. In the case of poor cooling conditions, the chance of nucleate boiling in such cavity flow channels is increased. The phase change caused by nucleate boiling causes the motor to generate gas explosion, water leakage, fatigue, etc., which causes the danger of motor application. Also increased. In addition, there are also spiral runner applications. This type of cooling runner is commonly used in the cooling of electric motors. The spiral runner is a cooling arrangement with an inlet orifice and an outlet orifice. The cooling fluid passes through the end of the motor. The flow hole enters the spiral cooling flow path, and then the other end of the motor passes through the outflow hole to leave the cooling flow path, and at the same time takes away the high heat on the motor, thereby achieving the cooling effect. However, the cooling fluid absorbs heat during the flow in the cooling flow path and gradually increases its own temperature. When the cooling fluid reaches the outflow hole, the temperature is higher than the temperature at which the cooling fluid has not entered the cooling flow path, and therefore, close to the outlet hole. The cooling effect achieved 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 stator windings on the front and rear of the motor by the spiral flow path is aggravated.

The present inventors have created a dual-cooling runner motor housing assembly in view of the fact that the conventional motor cooling runner only allows the cooling fluid to enter from one end of the motor, resulting in a poor cooling effect at the other end of the motor, improving its deficiencies and deficiencies.

The main object of the present invention is to provide a motor housing assembly having a dual cooling flow passage, wherein two cooling flow passages allow cooling fluid to enter from the two ends of the housing assembly, respectively, and then separately The two ends of the outer casing assembly are separated, so that each end of the outer casing assembly can receive a cooling fluid that has not been subjected to heat exchange with the heat source of the motor stator set and has a lower temperature to achieve a uniform cooling effect.

In order to achieve the above object, the motor housing assembly having the dual cooling flow passage includes: a housing having a cylindrical shape, and symmetrical cooling passages are formed on the outer surface of the housing, from the front end of the outer surface of the housing Extending to the rear end, and having an inlet end and an outlet end, wherein an inlet end of a cooling flow passage is adjacent to the front end of the housing, and an outlet end is adjacent to the rear end of the housing, and an inlet end of the other cooling flow passage is adjacent to the rear end of the housing And the outlet end is adjacent to the front end of the casing; the two cooling flow passages are independent of each other; the front end and the rear end of the casing respectively form a communication hole, and the two communication holes respectively communicate with the inlet ends of the two cooling flow passages; a casing sleeve having a cylindrical shape, sleeved on the casing and covering the two cooling flow passages, and a front outlet pipe and a rear outlet pipe are disposed on the casing sleeve to respectively respectively form two outlet ends of the two cooling flow passages Connected to the front end; a front cover plate is disposed at the front end of the casing, and a front flow pipe is disposed on the front cover plate to communicate with an inlet end of one of the cooling flow passages of the casing; the top end of the front cover plate is formed with a forward a front through hole in which the flow tube is connected, The front side of the front cover is formed with a front cooling passage communicating with the forward flow tube, and the front cooling passage communicates with the inlet end of one of the cooling flow passages through one of the communication holes of the housing; The front cover is disposed on the front cover and covers the front cooling passage, and an L-shaped passage is formed in the front passage gland to communicate with the front through hole and the front cooling passage; a rear cover is disposed behind the housing a rear inlet pipe communicating with an inlet end of another cooling flow passage of the casing is disposed on the rear cover; a rear through hole is formed at a top end of the rear cover plate and communicates with the rear inlet pipe, the rear cover The outer side surface of the plate is formed with a rear cooling passage communicating with the rear inlet pipe, and the rear cooling passage is communicated with the inlet end of the other cooling flow passage through another communication hole of the casing; A rear channel gland is detachably disposed on the rear cover and covers the rear cooling passage, and an L-shaped passage is formed in the rear passage gland to communicate with the rear through hole and the rear cooling passage.

According to the above technical means, the casing of the motor casing assembly of the present invention has two cooling flow passages, wherein one cooling flow passage communicates with the forward flow pipe and the rear discharge pipe, and the other cooling flow passage and the rear intake pipe and the front outlet pipe The flow tubes are connected to each other. When cooling is performed, two cooling fluids can be input to the forward flow tube and the rear inlet tube respectively, and the two cooling fluids respectively enter the two cooling flow paths from the front end and the rear end of the housing respectively, and finally respectively The rear outlet pipe and the front outlet pipe flow out of the casing. Thereby, two cooling fluids can be simultaneously entered from the front end and the rear end of the motor casing assembly and simultaneously cooled. Since the front and rear ends of the motor casing assembly simultaneously receive the cooling fluid that has not been heated and exchanged, the motor casing The copper wire windings, stator silicon steel sheets, rotating shafts, bearings and other parts at the front and rear ends of the module can obtain good cooling effect, avoiding the problem that the one end of the motor contacts the cooling fluid that has been heated to reduce the cooling efficiency.

Each of the cooling passages of the housing has a substantially serpentine shape.

Each of the cooling passages of the housing has a plurality of sections that are parallel to each other.

The front cooling passage of the front cover is substantially O-shaped; the rear cooling passage of the rear cover is substantially O-shaped.

Forming a front axle hole axially through the front cover; forming a rear axle hole axially through the rear cover; forming a front assembly hole axially through the front passage gland; and pressing the rear passage A rear assembly hole is formed through the cover axially.

10‧‧‧shell

100‧‧‧Cooling runner

101‧‧‧ entrance end

102‧‧‧export end

105‧‧‧Connected holes

20‧‧‧ outer casing

22a‧‧‧ after the outflow tube

22b‧‧‧Pre-existing tube

30‧‧‧ front cover

300‧‧‧Pre-cooling runner

301‧‧‧ front through hole

31‧‧‧Advance flow tube

35‧‧‧ front axle hole

40‧‧‧ rear cover

400‧‧‧After cooling runner

401‧‧‧After through hole

41‧‧‧ rear inlet tube

45‧‧‧ rear axle hole

50‧‧‧Front channel gland

500‧‧‧L-shaped channel

55‧‧‧Pre-assembled holes

60‧‧‧ rear channel gland

600‧‧‧L-shaped channel

65‧‧‧After assembly hole

90‧‧‧Motor Module

91‧‧‧Wire winding

92‧‧‧Standard steel sheet set

93‧‧‧Squirrel cage winding

94‧‧‧Rotor steel sheet set

95‧‧‧ shaft

Figure 1 is a perspective view of the present invention applied to a motor.

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

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

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

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

Figure 6 is a perspective view of the housing of the present invention.

Figure 7 is a top plan view of the housing of the present invention.

Figure 8 is an exploded perspective view of the front cover and the front passage gland of the present invention.

Figure 9 is a side elevational view of the front cover and front channel gland of the present invention.

Figure 10 is an exploded perspective view of the rear cover and the rear passage gland of the present invention.

Figure 11 is a side elevational view of the rear cover and rear passage gland of the present invention.

Fig. 12 is a schematic view showing the development of a flow path according to the first embodiment of the present invention.

Fig. 13 is a perspective view showing the flow path of the first embodiment of the present invention.

Fig. 14 is a schematic view showing the development of a flow path according to a second embodiment of the present invention.

Figure 15 is a perspective view showing a flow path of a second embodiment of the present invention.

Referring to FIG. 1 to FIG. 3, the first embodiment of the motor housing assembly having the dual cooling runner 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 steel sheet group 92, a squirrel cage winding 93, a rotor silicon steel sheet set 94, and a rotating shaft 95. The copper wire winding 91 is fixed to a stator silicon steel sheet set 92 which is fixed to the rotor steel sheet group 94, and the rotating shaft 95 is disposed in the rotor silicon steel sheet group 94.

With reference to FIG. 4 , the first embodiment of the motor housing assembly with the dual cooling runner 100 of the present invention accommodates the motor module 90 and includes: a housing 10 , a housing sleeve 20 , a front cover 30 , and a front cover 30 . The front channel gland 50, a rear cover 40, and a rear channel gland 60.

Referring to FIG. 6 , FIG. 12 and FIG. 13 , the housing 10 has a cylindrical shape and can accommodate the motor module 90 . Two symmetrical cooling channels 100 are formed on the outer surface of the housing 10 . Cooling flow The track 100 has a generally serpentine shape extending from the front end of the outer surface of the housing 10 to the rear end and has an inlet end 101, an outlet end 102, and a plurality of parallel sections. The inlet end 101 of one of the cooling channels 100 is near the front end of the casing 10, and the outlet end 102 is near the rear end of the casing 10. The inlet end 101 of the other cooling channel 100 is near the rear end of the casing 10, and the outlet end 102 is close to the casing. Front end of body 10. In addition, a communication hole 105 is 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 housing 10 are independent of each other and are not in communication.

The outer casing 20 is cylindrical and sleeved on the casing 10 and covers the two cooling runners 100. The outer casing 20 is provided with the front outlet pipe 22b and a rear outlet pipe 22a for cooling respectively. The two outlet ends 102 of the flow channel 100 are in communication.

Referring to FIG. 8 and FIG. 9, the front cover 30 is disposed at the front end of the casing 10, and the front cover 30 is provided with an advancement indirectly communicating with the inlet end 101 of one of the cooling passages 100 of the casing 10. Flow tube 31. A front shaft hole is formed in the front cover 30 to axially penetrate, and a bearing may be disposed in the front shaft hole for mounting the shaft 95. In addition, the top end of the front cover 30 is formed with a front through hole 301 communicating with the forward flow tube 31, and an outer surface of the front cover 30 is formed with a forward-flow tube 31 and a substantially O-shaped front cooling passage 300. The front cooling passage 300 communicates with the inlet end 101 of one of the cooling passages 100 through the communication hole 105 of the housing 10.

The front channel gland 50 is detachably disposed on the front cover 30 and covers the front cooling passage 300. An L-shaped passage 500 is formed on the front passage gland 50 to form a front through hole 301 and a front cooling passage. 300 connected. Further, a front assembly hole 55 is formed in the front passage gland 50 for axial passage therethrough for the passage of the rotation shaft 95.

Referring to FIG. 10 and FIG. 11 , the rear cover 40 is disposed at the rear end of the housing 10 , and the rear cover 40 is disposed in indirect communication with the inlet end 101 of the other cooling flow passage 100 of the housing 10 . Rear inlet tube 41. A rear axle hole 45 is formed in the rear cover 40, and a bearing is disposed in the rear axle hole 45 for mounting the shaft 95. In addition, a top end of the rear cover 40 is formed to communicate with the rear inlet tube 41. The rear through hole 401, the outer side surface of the rear cover 40 is formed with a substantially rear O-shaped cooling passage 400 communicating with the rear inlet pipe 41, and the rear cooling passage 400 is transmitted through the other communication hole 105 of the casing 10 to another The inlet end 101 of the cooling flow passage 100 is in communication.

Referring to FIG. 5, the rear channel gland 60 is detachably disposed on the rear cover 40 and covers the rear cooling passage 400. An L-shaped passage 600 and a rear through hole 401 are formed in the rear passage gland 60. And the aftercooling passages 400 are in communication. Further, a rear assembly hole 65 is formed in the rear passage gland 60 for axial passage therethrough for the passage of the rotation shaft 95.

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

Referring to Figures 14 and 15, the second embodiment of the motor housing assembly of the dual cooling runner 100 of the present invention is substantially the same as the first embodiment, except that the forward flow tube 31 is disposed in the outer casing 20 The front cover 30 and the rear cover 40 do not have an O-shaped front cooling passage 300 and an O-shaped rear cooling passage 400, respectively.

By the above 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 flow passages 100, wherein one cooling flow passage 100 communicates with the forward flow tube 31 and the rear outlet tube 22a, and the other cooling flow passage 100 and the rear inlet tube 41 In communication with the front outlet pipe 22b, when cooling is performed, two cooling fluids may be input to the forward flow pipe 31 and the rear inlet pipe 41, respectively, from the forward flow pipe 31 and the rear inlet pipe of the front cover, respectively. 41 is injected, and enters the two cooling flow passages 100 from the front end and the rear end of the casing 10 respectively, and finally flows out of the casing 10 from the rear outlet pipe 22a and the front outlet pipe 22b, respectively, as shown in FIGS. 12 and 13 or 14 and 15 are displayed. Thereby, two cooling fluids can be simultaneously entered from the front end and the rear end of the motor casing assembly and simultaneously cooled. Since the front and rear ends of the motor casing assembly simultaneously receive the cooling fluid that has not been heated and exchanged, the motor casing Copper wire windings, stator silicon steel sheets, rotating shafts, bearings at the front and rear ends of the assembly All parts can get good cooling effect, avoiding the problem that the one end of the motor contacts the cooling fluid that has been heated to reduce the cooling efficiency.

2. The cooling flow passage 100 of the present invention has a serpentine configuration and has a plurality of parallel sections, which can increase the area covered by the cooling fluid, and can be arranged to extend in the axial direction of the housing 10, without the traditional spiral water channel. Due to the manufacturing limitation of the pitch, the area covered by the cooling fluid is not generated. The cooling channel 100 of the serpentine of the present invention can be easily applied to motors of different lengths or sizes, which greatly improves the applicability of the motor casing assembly.

20‧‧‧ outer casing

22a‧‧‧ after the outflow tube

22b‧‧‧Pre-existing tube

30‧‧‧ front cover

31‧‧‧Advance flow tube

40‧‧‧ rear cover

41‧‧‧ rear inlet tube

50‧‧‧Front channel gland

95‧‧‧ shaft

Claims (5)

A motor housing assembly having a dual cooling flow passage, comprising: a housing having a cylindrical shape, and a symmetrical cooling flow passage formed on an outer surface of the housing, extending from a front end of the outer surface of the housing to a rear end And having an inlet end and an outlet end, wherein an inlet end of one cooling channel is adjacent to the front end of the casing, and an outlet end is adjacent to the rear end of the casing, and an inlet end of the other cooling channel is adjacent to the rear end of the casing, and the outlet end Close to the front end of the casing; the two cooling flow passages are independent of each other; the front end and the rear end of the casing respectively form a communication hole, and the two communication holes respectively communicate with the inlet ends of the two cooling flow passages; a cylindrical shape, sleeved on the casing and covering the two cooling flow passages, and a front outflow pipe and a rear outflow pipe are disposed on the outer casing to respectively communicate with the two outlet ends of the two cooling flow passages; a front cover plate is disposed at a front end of the casing, and a front flow pipe is disposed on the front cover plate to communicate with an inlet end of one of the cooling flow passages of the casing; a top end of the front cover plate is formed to communicate with the forward flow pipe Front through hole, outside of the front cover Forming a front cooling passage communicating with the forward flow tube, the front cooling passage communicating with an inlet end of one of the cooling flow passages through one of the communication holes of the housing; a front passage gland disposed in the detachable manner The front cover covers and covers the front cooling passage, and an L-shaped passage is formed in the front passage gland to communicate with the front through hole and the front cooling passage; a rear cover is disposed at the rear end of the housing at the rear cover a rear inlet pipe communicating with an inlet end of another cooling flow passage of the casing is disposed on the plate; a rear through hole is formed at a top end of the rear cover plate to communicate with the rear inlet pipe, and an outer side surface of the rear cover plate is formed a rear cooling passage communicating with the rear inlet pipe, the rear cooling passage communicating with the inlet end of the other cooling flow passage through another communication hole of the casing; and a rear passage gland detachably disposed on the rear cover The plate covers the rear cooling passage, and an L-shaped passage is formed in the rear passage gland to communicate with the rear through hole and the rear cooling passage. A motor housing assembly having a dual cooling flow passage according to claim 1, wherein each of the cooling passages of the housing has a substantially serpentine shape. A motor housing assembly having a dual cooling runner as claimed in claim 2, wherein each of the cooling passages of the housing has a plurality of sections that are parallel to each other. A motor housing assembly having a dual cooling runner according to any one of claims 1 to 3, wherein the front cooling passage of the front cover is substantially O-shaped; the rear cooling passage of the rear cover is substantially O-shaped. The motor casing assembly of claim 4, wherein the front cover plate axially penetrates to form a front axle hole; the rear cover plate axially penetrates to form a rear axle hole; on the front passage gland A front assembly hole is formed in the axial direction; and a rear assembly hole is formed in the axial direction through the rear channel cover.