CN213425914U

CN213425914U - Outer rotor explosion-proof motor

Info

Publication number: CN213425914U
Application number: CN202022224490.7U
Authority: CN
Inventors: 孔万敏; 陈洪星; 屠金伟; 祝福剑; 吴玲佳; 李�杰
Original assignee: Zhejiang Mingzhen Electronics Co ltd
Current assignee: Zhejiang Mingzhen Electronics Co ltd
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2021-06-11
Anticipated expiration: 2030-10-09

Abstract

The utility model relates to a motor specifically discloses an outer rotor flame proof motor. The outer rotor explosion-proof motor comprises a stator and an outer rotor assembly, wherein an output shaft is arranged on the outer rotor assembly and is rotatably and movably connected with the stator; the method is characterized in that: the explosion-proof stator is characterized by further comprising a shell, wherein the shell is connected with the stator, and a first explosion-proof joint area is formed at the joint; the outer rotor assembly is coated in the outer shell and the stator together; the shell is provided with a shaft hole, and the output shaft is inserted into the shaft hole and penetrates out of the shell; the shaft hole from inside to outside in proper order including support section and flame proof section, output shaft and support between be equipped with the bearing, output shaft and flame proof section between form second flame proof junction area. The outer rotor explosion-proof motor integrally protects the outer rotor through the shell, and the joints among the shell, the stator and the output shaft are strictly designed according to explosion-proof requirements, so that the operation safety is improved.

Description

Outer rotor explosion-proof motor

Technical Field

The utility model relates to a motor specifically discloses an outer rotor flame proof motor.

Background

The outer rotor motor is widely used due to the advantages of low noise, large torque, easy maintenance and the like, and is particularly used in the field of fans. At present, the technology of the outer rotor motor is mature, for example, chinese patent application with application publication number CN 103248163A and chinese patent application with application publication number CN 101728893A disclose an outer rotor motor respectively, which structurally comprises an outer rotor assembly, a stator and an end cover, wherein the outer rotor assembly is provided with an output shaft, and the output shaft is connected with the stator through a bearing. However, because the outer rotor component and the stator are movably combined, the sealing inside the motor is difficult to realize, the explosion-proof requirement cannot be met, and when the outer rotor motor works under the flammable and explosive working conditions, the risk of explosion caused by the motor exists.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide an outer rotor flame proof motor, through the casing with the whole protection of outer rotor, and junction between casing and stator and the output shaft strictly designs according to the flame proof requirement, improves the security of operation.

In order to solve the technical problem, the utility model provides a technical scheme as follows: an outer rotor explosion-proof motor comprises a stator and an outer rotor assembly, wherein an output shaft is arranged on the outer rotor assembly and is rotatably and movably connected with the stator; the explosion-proof stator is characterized by further comprising a shell, wherein the shell is connected with the stator, and a first explosion-proof joint area is formed at the joint; the outer rotor assembly is coated in the outer shell and the stator together; the shell is provided with a shaft hole, and the output shaft is inserted into the shaft hole and penetrates out of the shell; the shaft hole from inside to outside in proper order including support section and flame proof section, output shaft and support between be equipped with the bearing, output shaft and flame proof section between form second flame proof junction area.

The shell is combined with the stator, and the outer rotor assembly is coated, so that the risk of explosion caused by the motor can be effectively reduced, and the use safety and the application range are improved. In addition, a second explosion-proof junction area is formed between the shell and the output shaft, so that the explosion-proof performance is ensured while power output is realized. Meanwhile, a bearing is arranged between the shaft hole and the output shaft, the concentricity of the output shaft and the shaft hole is ensured, the gap between the output shaft and the shaft hole is uniform, and the output shaft and the shaft hole are prevented from being cremated due to friction during working rotation.

Preferably, the shaft hole further comprises a sealing section, and a sealing ring is arranged between the sealing section and the output shaft.

Preferably, the sealing section is positioned at the outer end of the shaft hole; the sealing ring is a U-shaped sealing ring.

The setting of sealing washer can prevent that dust and steam from getting into, improves the life of motor.

Preferably, the stator comprises an end cover, and a first sealing area is arranged between the end face of the opening end of the shell and the end cover; the end cover is provided with a first sealing convex rib which is annularly arranged, the first sealing convex rib is inserted into the shell, and a second sealing area is arranged between the first sealing convex rib and the inner wall of the shell; the first explosion-proof joint area comprises a first sealing area and a second sealing area.

Preferably, the explosion-proof device further comprises a control box assembly, the control box assembly is located on one side, far away from the shell, of the stator and is detachably connected with the stator, and a third explosion-proof joint area is formed at the joint of the control box assembly and the stator. The third flameproof junction area effectively guarantees the flameproof performance of the junction of the control box assembly and the stator, and the use safety is improved.

Preferably, a third sealing area is formed between the control box end face and the stator; the end part of the control box assembly is provided with a second sealing convex rib, the stator is provided with a socket hole, the second sealing convex rib is inserted into the socket hole, and a fourth sealing area is formed between the second sealing convex rib and the inner wall of the socket hole; the third explosion-proof junction area comprises a third sealing area and a fourth sealing area.

Preferably, the first explosion-proof junction area, the second explosion-proof junction area and the third explosion-proof junction area are all arranged according to the requirements of GB3836.1 and GB 3836.2.

Drawings

FIG. 1 is a schematic structural diagram of an outer rotor flameproof motor in this embodiment;

FIG. 2 is an explosion diagram of the outer rotor explosion-proof motor in the embodiment;

FIG. 3 is a full sectional view of the outer rotor flameproof motor of the embodiment;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is an enlarged view of a portion of FIG. 3 at B;

fig. 6 is a partially enlarged view at C in fig. 3.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Examples

As shown in fig. 1 and 2, the outer rotor explosion-proof motor comprises a stator 3 and an outer rotor assembly 5, wherein an output shaft 2 is arranged on the outer rotor assembly 5, and the output shaft 2 is rotatably and movably connected with the stator 3. The stator 3 comprises an end cover.

As shown in fig. 1 and fig. 2, the magnetic coupling device further comprises a housing 1, wherein the housing 1 is connected with an end cover, and the housing 1 and a stator 3 together cover an outer rotor assembly 5; the shell 1 is provided with a shaft hole, and the output shaft 2 is inserted into the shaft hole and penetrates out of the shell 1. The shell 1 is combined with the stator 3, and the outer rotor assembly 5 is coated inside, so that the risk of explosion caused by the motor can be effectively reduced, and the use safety and the application range are improved.

As shown in fig. 3 and 4, a first sealing area 71 is formed between the end face of the open end of the housing 1 and the end cap. The end cover on be equipped with the first sealed protruding muscle 31 of annular setting, first sealed protruding muscle 31 insert in the shell 1, be second sealed region 72 between first sealed protruding muscle 31 and the shell 1 inner wall. The first sealing area 71 and the second sealing area 72 jointly form a first explosion-proof joint area.

As shown in fig. 3 and 5, the shaft hole sequentially comprises a supporting section, an explosion-proof section and a sealing end from inside to outside, a bearing 61 is arranged between the output shaft 2 and the supporting section, and a second explosion-proof junction area 62 is formed between the output shaft 2 and the explosion-proof section.

As shown in fig. 3 and 5, a second flameproof junction area 62 is formed between the housing 1 and the output shaft 2, so that the flameproof performance is ensured while power output is realized. Meanwhile, the bearing 61 is arranged between the shaft hole and the output shaft 2, the concentricity of the output shaft 2 and the shaft hole is ensured, the gap between the output shaft 2 and the shaft hole is uniform, and the cremation caused by friction between the output shaft and the shaft hole during the working rotation is avoided.

As shown in fig. 5, a sealing ring 63 is arranged between the sealing section and the output shaft 2, the sealing section is located at the outer end of the shaft hole, and the sealing ring 63 is a U-shaped sealing ring 63. The sealing ring 63 can prevent dust and water vapor from entering, and the service life of the motor is prolonged.

As shown in fig. 3 and 6, the motor control device further comprises a control box 4 assembly, wherein the control box 4 assembly is connected to the side of the stator 3 far away from the shell 1 and detachably connected with the stator 3, and a third sealing area 82 is formed between the end face of the control box 4 and the stator 3. The end of the control box 4 assembly is provided with a second sealing convex rib, the stator 3 is provided with a socket hole, the second sealing convex rib is inserted into the socket hole, and a fourth sealing area 81 is formed between the second sealing convex rib and the inner wall of the socket hole. The third sealing area 82 and the fourth sealing area 81 together form a third explosion-proof joint area. The third explosion-proof junction area effectively ensures the explosion-proof performance of the junction of the control box 4 assembly and the stator 3, and improves the use safety.

The specific sealing path lengths and the joint surface gaps of the first explosion-proof joint area, the second explosion-proof joint area 62 and the third explosion-proof joint area are all set according to the requirements of GB3836.1 and GB 3836.2.

In summary, the above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims

1. An outer rotor explosion-proof motor comprises a stator and an outer rotor assembly, wherein an output shaft is arranged on the outer rotor assembly and is rotatably and movably connected with the stator; the method is characterized in that: the explosion-proof stator is characterized by further comprising a shell, wherein the shell is connected with the stator, and a first explosion-proof joint area is formed at the joint; the outer rotor assembly is coated in the outer shell and the stator together; the shell is provided with a shaft hole, and the output shaft is inserted into the shaft hole and penetrates out of the shell; the shaft hole from inside to outside in proper order including support section and flame proof section, output shaft and support between be equipped with the bearing, output shaft and flame proof section between form second flame proof junction area.

2. The outer rotor flameproof motor of claim 1, characterized in that: the shaft hole still include the seal section, seal section and output shaft between be equipped with the sealing washer.

3. The outer rotor flameproof motor of claim 2, characterized in that: the sealing section is positioned at the outer end of the shaft hole; the sealing ring is a U-shaped sealing ring.

4. The outer rotor flameproof motor of claim 1, characterized in that: the stator comprises an end cover, and a first sealing area is arranged between the end surface of the opening end of the shell and the end cover; the end cover is provided with a first sealing convex rib which is annularly arranged, the first sealing convex rib is inserted into the shell, and a second sealing area is arranged between the first sealing convex rib and the inner wall of the shell; the first explosion-proof joint area comprises a first sealing area and a second sealing area.

5. An outer rotor flameproof motor according to any of claims 1 to 4, characterized in that: the explosion-proof device is characterized by further comprising a control box assembly, wherein the control box assembly is located on one side, far away from the shell, of the stator and is detachably connected with the stator, and a third explosion-proof junction area is formed at the joint of the control box assembly and the stator.

6. The outer rotor flameproof motor of claim 5, characterized in that: a third sealing area is formed between the end face of the control box and the stator; the end part of the control box assembly is provided with a second sealing convex rib, the stator is provided with a socket hole, the second sealing convex rib is inserted into the socket hole, and a fourth sealing area is formed between the second sealing convex rib and the inner wall of the socket hole; the third explosion-proof junction area comprises a third sealing area and a fourth sealing area.

7. The outer rotor flameproof motor of claim 5, characterized in that: the first explosion-proof junction area, the second explosion-proof junction area and the third explosion-proof junction area are all arranged according to the requirements of GB3836.1 and GB 3836.2.