Forced air cooling type motor heat dissipation structure with auxiliary heat dissipation ribs

Abstract

The invention discloses a forced air cooling type motor heat dissipation structure with auxiliary heat dissipation ribs. The forced air cooling type motor heat dissipation structure comprises a rotating shaft, a flow guide disc, a rotor iron core, a machine shell, a stator iron core, a flow guide pipe, a winding, a front end cover, a rear end cover and a bearing. Auxiliary radiating ribs are uniformly distributed on the outer surface of the casing, the rotor core is sleeved on the rotating shaft in a matching manner, the two diversion discs are respectively abutted against two ends of the rotor core and are arranged in a sealing manner, the inner circular surfaces of the diversion discs are attached to the outer circular surface of the rotating shaft, the stator core is sleeved in the casing in a matching manner, the winding is embedded on the stator core, and four diversion pipes are mounted at two ends of the casing. A front end cover and a rear end cover are fixedly installed at the two ends of the machine shell respectively. A blind hole is formed in the non-shaft-extension end of the rotating shaft in the axial direction, and a flow collecting opening communicated with the blind hole is formed in the outer side of the rear end cover. And a cross cooling air path is formed among the rotating shaft, the rotor core, the flow guide disc, the stator core, the casing and the flow guide pipe. The motor has the advantages of effectively reducing the temperature of the rotating shaft, enabling the temperature distribution of the motor to be more uniform and being high in heat dissipation efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a forced air-cooled motor heat dissipation structure with auxiliary heat dissipation ribs. Background Art

[0002] The stator core, rotor core, winding, shaft, and housing in the motor are the main heat sources, and their temperatures are often high, so they need to be cooled to ensure stable and safe operation. Forced ventilation cooling motors use air as the medium, and the cooling air is driven by an external blower to flow inside or outside the motor, directly contacting the heat-generating components for heat exchange to achieve the purpose of heat dissipation. Therefore, by optimizing the flow path of the cooling air through reasonable structural design, not only can the heat dissipation efficiency be improved, but also the temperature distribution of each part of the motor can be more uniform.

[0003] The cooling air path of the forced air cooling motor in the prior art is shown in the attached figure of the specification Figure 1 As shown, the blower drives the cooling air to enter the motor from the air inlet on the circumferential side of the casing. The cooling air flows unidirectionally inside the motor to provide heat dissipation and finally flows out from the side end cover. However, this solution has the following problems: On the one hand, the cooling air path of the existing solution is long and the path is single. The temperature of the cooling air in the latter part of the path has risen, so the heat that can be taken away is limited, resulting in uneven temperature distribution of the motor. On the other hand, when the motor runs at high speed, its metal shaft and casing will produce large eddy current losses in the alternating magnetic field, resulting in a high internal temperature. The cooling efficiency of the inside of the shaft and the outside of the casing of this solution is low. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by this patent application is how to provide a forced air-cooled motor heat dissipation structure with auxiliary heat dissipation ribs that can effectively reduce the temperature of the shaft, make the temperature distribution of the stator and rotor more uniform, have high heat dissipation efficiency, and at the same time have a simple structure and be easy to manufacture.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A forced air-cooled motor heat dissipation structure with auxiliary heat dissipation ribs, comprising a rotating shaft, two guide plates, a rotor core, a casing, a stator core, a guide pipe, a winding, a front cover, a rear cover and a bearing, wherein the outer surface of the casing is evenly distributed with auxiliary heat dissipation ribs; the rotor core is fitted on the rotating shaft, the two guide plates are respectively abutted against the two ends of the rotor core and sealed, the inner circumference of the guide plate is fitted with the outer circumference of the rotating shaft, the stator core is fitted in the casing, the winding is composed of a coil wound by a metal wire, the winding is embedded in the stator core, and the winding The end is suspended on the outside of the stator core, four guide pipes are installed at both ends of the casing, and a front cover and a rear cover are fixedly installed at both ends of the casing, and the front cover and the rear cover are both provided with bearings for supporting the rotating shaft; a blind hole is axially arranged at the non-extended end of the rotating shaft, and radial ventilation holes are circumferentially arranged to communicate with the blind hole; a collecting port that can be connected to the air outlet of the blower is arranged on the outside of the rear end cover, and the blind hole is communicated with the collecting port; a cross cooling air path is formed between the rotating shaft, the rotor core, the guide plate, the stator core, the casing and the guide pipe.

[0007] Wherein, the cross cooling air path includes the following structure:

[0008] Four left ventilation holes and four right ventilation holes are evenly distributed at both ends of the blind hole along the circumference of the rotating shaft, and the left ventilation holes and the right ventilation holes are staggered 45° from each other in the circumferential direction and are all connected to the blind holes; the rotor core includes eight rotor axial ventilation holes evenly distributed along the circumferential direction; the interior of the guide plate is evenly divided into eight sector-shaped spaces along the circumferential direction, and any two adjacent sector-shaped spaces are respectively an air inlet area and an air outlet area, and the inner circumference of the four air inlet areas is provided with air inlet holes; the air inlet holes of the guide plate located on both sides of the rotor core are respectively connected to the left ventilation holes and the right ventilation holes of the rotating shaft; the air inlet area of ​​the guide plate located on both sides of the rotor core and the air outlet area are cross-connected with the rotor axial ventilation holes of the rotor core respectively; the stator core is evenly distributed with eight stator axial ventilation holes along the circumferential direction; the two ends of the casing are respectively evenly distributed with four left radial tube holes and four right radial tube holes along the circumferential direction of the casing, and the left radial tube holes and the right radial tube holes are staggered 45° from each other in the circumferential direction; the central axes of the eight stator axial ventilation holes of the stator core are coplanar with the central axes of the left radial tube holes and the right radial tube holes respectively; eight guide pipes respectively pass through the left radial tube holes and the right radial tube holes on the casing and are cross-inserted into the stator axial ventilation holes of the stator core.

[0009] Wherein, the flow guide pipe includes two straight pipes and a right-angle elbow pipe for connecting the two straight pipes.

[0010] Wherein, the joint between the rotor core and the guide plate is sealed by an adhesive or an elastic pad.

[0011] Wherein, the front end cover is provided with a flange which can be used for installing and connecting the motor.

[0012] In summary, the forced air-cooled motor heat dissipation structure with auxiliary heat dissipation ribs has the following beneficial effects:

[0013] 1. By setting an axial blind hole on the shaft as an air inlet and air duct, cooling air flows through the inside of the shaft and takes away the heat, effectively reducing the shaft temperature;

[0014] Second, auxiliary heat dissipation ribs are set on the outer surface of the casing to provide heat dissipation for the casing, thereby improving the heat dissipation efficiency of the motor;

[0015] 3. A guide plate is designed, which takes in air from the circumferential inner surface and the air inlet area and the air outlet area are isolated and diverted from each other. Through the cross connection between the guide plate and the ventilation holes on the rotor core, a cross cooling air path for the rotor part is formed. The ventilation pipe composed of two straight pipes and one right-angle elbow pipe is cross-connected with the casing pipe holes and the stator core ventilation holes to form a cross cooling air path for the stator part. This not only makes the temperature distribution of the stator and rotor more uniform, but also has a simple structure and is easy to manufacture. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The schematic diagram of the cooling air path of the forced air-cooled motor in the prior art described in the background art, wherein the arrow represents the flow direction of the cooling air.

[0017] Figure 2 It is a 135° cross-sectional structural schematic diagram of a forced air-cooled motor heat dissipation structure with auxiliary heat dissipation ribs described in the present invention.

[0018] Figure 3 A schematic diagram of the rotating shaft.

[0019] Figure 4 Schematic diagram of the guide plate.

[0020] Figure 5 Schematic diagram of the rotor core.

[0021] Figure 6 A schematic diagram of the casing.

[0022] Figure 7 Schematic diagram of the stator core.

[0023] Figure 8 This is a schematic diagram of the rotor structure.

[0024] Fig. 9 It is a schematic diagram of the stator structure. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings. In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "upper, lower" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the devices or components referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0026] like Figure 2-9 As shown, a forced air-cooled motor heat dissipation structure with auxiliary heat dissipation ribs includes a rotating shaft 1, a guide plate 2, a rotor core 3, a casing 4, a stator core 5, a guide tube 6, a winding 7, a rear end cover 8, a front end cover 9, and a bearing 10. The outer surface of the casing 4 is evenly distributed with auxiliary heat dissipation ribs; the rotor core is fitted on the rotating shaft, the two guide plates are respectively abutted against the two ends of the rotor core and sealed, the inner circumferential surface of the guide plate is fitted with the outer circumferential surface of the rotating shaft, the stator core is fitted in the casing, the winding 7 is composed of a coil wound by a metal wire, and the winding 7 is embedded in the stator. On the sub-core, the end of the winding 7 is suspended on the outside of the stator core 5, four guide tubes are installed at both ends of the casing, and the front end cover and the rear end cover are fixedly installed at both ends of the casing, and the front end cover and the rear end cover are both provided with bearings for supporting the rotating shaft; the non-axial extension end of the rotating shaft 1 is axially provided with a blind hole 100, and the outer side of the rear end cover 8 is provided with a collecting port that can be connected to the air outlet of the blower, and the blind hole 100 is connected with the collecting port; a cross cooling air path is formed between the rotating shaft 1, the rotor core 3, the guide plate 2, the stator core 5, the casing 4 and the guide tube 6.

[0027] The cross cooling air path includes the following structure:

[0028] Four left ventilation holes and four right ventilation holes are evenly distributed at both ends of the blind hole 100 along the circumference of the rotating shaft. The left ventilation holes and the right ventilation holes are staggered by 45° from each other in the circumferential direction and are both connected to the blind hole 100. The left ventilation holes are numbered 101A, 102A, 103A, and 104A in sequence, and the right ventilation holes are numbered 101B, 102B, 103B, and 104B in sequence.

[0029] The rotor core 3 includes eight rotor axial ventilation holes evenly distributed along the circumferential direction, and the left openings of the rotor axial ventilation holes are numbered from rotor left ventilation opening 301A to rotor left ventilation opening 308A in sequence. Figure 5 Only 301A-303A are marked in the figure, and the right side openings of the rotor axial ventilation holes are numbered from rotor right ventilation opening 301B to rotor right ventilation opening 308B in sequence. Figure 5Only 301B-303B are marked, and the rotor left vent 301A and the rotor right vent 301B belong to the same vent hole, and the rest are similar.

[0030] The interior of the guide plate 2 is evenly divided into eight sector-shaped spaces along the circumferential direction, and any two adjacent sector-shaped spaces are respectively an air inlet area 202 and an air outlet area 203 . The inner circumferences of the four air inlet areas 202 are provided with air inlet holes 201 .

[0031] The air inlet holes 201 of the guide plate 2 located on both sides of the rotor core 3 are respectively connected to the left ventilation hole and the right ventilation hole of the rotating shaft 1; the air inlet area 202 and the air outlet area 203 of the guide plate 2 located on both sides of the rotor core 3 are respectively connected to the rotor axial ventilation holes of the rotor core 3;

[0032] The stator core 3 has eight stator axial ventilation holes evenly distributed along the circumferential direction; the central axes of the eight stator axial ventilation holes of the stator core are coplanar with the central axes of the left radial tube holes and the right radial tube holes respectively; the eight guide pipes pass through the left radial tube holes and the right radial tube holes on the casing respectively and are inserted into the stator axial ventilation holes of the stator core; the left openings of the stator axial ventilation holes are numbered sequentially as stator left ventilation opening 501A to stator left ventilation opening 508A, attached Figure 7 In the figure, only 501A-503A are marked, and the right openings of the stator axial ventilation holes are numbered stator right ventilation opening 501B to stator right ventilation opening 508B in sequence. Figure 7 In the figure, only 501B-503B are marked, and the stator left vent 501A and the stator right vent 501B belong to the same vent, and the rest are similar.

[0033] The two ends of the housing 4 are respectively provided with four left radial tube holes and four right radial tube holes uniformly distributed along the circumference of the housing, and the left radial tube holes and the right radial tube holes are staggered 45 degrees from each other in the circumferential direction; the left tube holes are numbered 401A, 402A, 403A, 404A in sequence, and the right tube holes are numbered 401B, 402B, 403B, 404B in sequence, Figure 6 In the table, only 401B and 404B are marked.

[0034] The guide pipe 6 includes two straight pipes and a right-angle elbow pipe for connecting the two straight pipes, and is used to provide a cooling air path.

[0035] The joint between the rotor core 3 and the guide plate 2 is sealed by adhesive or elastic pad. A flange that can be used to install and connect the motor is provided on the front cover 9. The bearing 10 is used to support the relative rotational movement between the stator and the rotor.

[0036] The above structure forms two cross cooling air paths as follows: Figure 2 As shown:

[0037] The first cooling air path is: the blind hole 100 of the rotating shaft 1 - the left ventilation holes 101A, 102A, 103A, 104A of the rotating shaft 1 - the air inlet 201 of the left guide plate 2 - the air inlet area 202 of the left guide plate 2 - the left ventilation holes 301A, 303A, 305A, 307A of the rotor core 3 - the right ventilation holes 301B, 303B, 305B, 307B of the rotor core 3 - the air outlet area 203 of the right guide plate 2 - the right ventilation holes 501B, 503B, 505B, 507B of the stator core 5 - the left ventilation holes 501A, 503A, 505A, 507A of the stator core 5 - the left guide pipe 6 - the left pipe holes 401A, 402A, 403A, 404A of the casing 4:

[0038] The second cooling air path is: blind hole 100-right ventilation holes 101B, 102B, 103B, 104B of the rotating shaft 1-air inlet 201 of the right guide plate 2-air inlet area 202 of the right guide plate 2-right ventilation holes 302B, 304B, 306B, 308B of the rotor core 3-left ventilation holes 302A, 304A, 306A, 308A of the rotor core 3--air outlet area 203 of the left guide plate 2-left ventilation holes 502A, 504A, 506A, 508A of the stator core 5-right ventilation holes 502B, 504B, 506B, 508B of the stator core 5-right guide pipe 6-right pipe holes 401B, 402B, 403B, 404B of the casing 4.

[0039] The above two paths intersect each other and are in opposite directions, and can provide cooling for the shaft 1, the rotor core 3, the winding 7, and the stator core 5 in sequence. At the same time, the heat dissipation ribs on the housing 4 provide auxiliary heat dissipation for the motor.

[0040] Finally, it should be noted that those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A forced air-cooled motor heat dissipation structure with auxiliary heat dissipation ribs, characterized in that: It includes a rotating shaft, two guide plates, a rotor core, a casing, a stator core, a guide tube, a winding, a front cover, a rear cover and a bearing, and the outer surface of the casing is evenly distributed with auxiliary heat dissipation ribs; The rotor core is fitted on the rotating shaft, two guide plates are respectively abutted against the two ends of the rotor core and sealed, the inner circumference of the guide plate is in contact with the outer circumference of the rotating shaft, the stator core is fitted in the casing, the winding is composed of a coil wound by a metal wire, the winding is embedded on the stator core, the end of the winding is suspended outside the stator core, four guide tubes are installed at both ends of the casing, and a front cover and a rear cover are fixedly installed at both ends of the casing, and the front cover and the rear cover are both provided with bearings for supporting the rotation of the rotating shaft; The non-axial extension end of the rotating shaft is provided with a blind hole in the axial direction, and a radial ventilation hole is provided in the circumferential direction and is connected to the blind hole. The outer side of the rear end cover is provided with a manifold that can be connected to the air outlet of the blower, and the blind hole is connected to the manifold; A cross cooling air path is formed between the rotating shaft, the rotor core, the guide plate, the stator core, the casing and the guide pipe.

2. A forced air-cooled motor heat dissipation structure with auxiliary heat dissipation ribs according to claim 1, characterized in that: The cross cooling air path includes the following structure: Four left ventilation holes and four right ventilation holes are evenly distributed at both ends of the blind hole along the circumference of the rotating shaft, and the left ventilation holes and the right ventilation holes are staggered 45 degrees from each other in the circumferential direction and are both connected to the blind hole; The rotor core comprises eight rotor axial ventilation holes evenly distributed along the circumferential direction; The interior of the guide plate is evenly divided into eight fan-shaped spaces along the circumferential direction, and any two adjacent fan-shaped spaces are respectively an air inlet area and an air outlet area, and the inner circumferences of the four air inlet areas are provided with air inlet holes; The air inlet holes of the guide plates located on both sides of the rotor core are respectively connected to the left ventilation hole and the right ventilation hole of the rotating shaft; The air inlet area and the air outlet area of ​​the guide plates located on both sides of the rotor core are cross-connected with the rotor axial ventilation holes of the rotor core respectively; The stator core has eight stator axial ventilation holes evenly distributed along the circumferential direction; The two ends of the housing are respectively provided with four left radial tube holes and four right radial tube holes evenly distributed along the circumference of the housing, and the left radial tube holes and the right radial tube holes are staggered 45 degrees from each other in the circumferential direction; The central axes of the eight stator axial ventilation holes of the stator core are respectively coplanar with the central axes of the left radial tube holes and the right radial tube holes; The eight flow guide pipes respectively pass through the left radial pipe hole and the right radial pipe hole on the casing and are cross-inserted into the stator axial ventilation holes of the stator core.

3. The forced air-cooled motor heat dissipation structure with auxiliary heat dissipation ribs according to claim 1, characterized in that: The flow guide pipe comprises two straight pipes and a right-angle elbow pipe for connecting the two straight pipes.

4. The forced air-cooled motor heat dissipation structure with auxiliary heat dissipation ribs according to claim 1, characterized in that: The joint between the rotor core and the guide plate is sealed by using adhesive or elastic pad.

5. The forced air-cooled motor heat dissipation structure with auxiliary heat dissipation ribs according to claim 1, characterized in that: The front end cover is provided with a flange which can be used for installing and connecting the motor.

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