CN222339131U - Permanent magnet synchronous drainage motor - Google Patents

Abstract

The application relates to a permanent magnet synchronous drainage motor which is applied to the field of drainage motors and comprises a motor shaft, a magnet, a coupler, a bearing assembly, an elastomer, an end cover and an impeller, wherein a sealing hole is formed in one end, close to the bearing assembly, of the impeller, a sealing ring is arranged in the sealing hole, an impeller cavity is formed in the other end, away from the bearing assembly, of the impeller, the motor shaft penetrates through the central hole of the sealing ring and stretches into the impeller cavity, a passive rib is arranged on the surface, facing the bearing assembly, of the end cover, a welding surface is arranged on the edge of the end cover, and the end face of the impeller is welded with the welding surface. The application has the technical effects that the welding space is used for welding the end face and the welding face of the impeller, the possibility of lubricating oil loss in the impeller cavity is reduced, the lubricating effect of the coupler and the elastomer is ensured, and the service lives of the coupler and the elastomer are prolonged.

Description

Permanent magnet synchronous drainage motor

Technical Field

The application relates to the technical field of drainage motors, in particular to a permanent magnet synchronous drainage motor.

Background

The permanent-magnet synchronous drainage motor is a high-performance motor, and utilizes a permanent magnet to generate a magnetic field, and has the characteristics of simple structure, small volume, light weight, high efficiency, high power factor, reliable operation and the like. In the drainage system, the permanent magnet synchronous drainage motor can be used as a driving device, and an efficient and energy-saving solution is provided.

Referring to fig. 1, the permanent magnet synchronous drainage motor in the related art comprises a motor shaft 1, a magnet 2, a plastic package part 3, a bearing assembly 4, an impeller 5 and a sealing ring 6, wherein the motor shaft 1 and the magnet 2 are integrally molded through the plastic package part 3, an impeller cavity is arranged at one end of the impeller 5, which is close to the bearing assembly 4, an end cover 9 is arranged in a port of the impeller cavity, which is close to the bearing assembly 4, the motor shaft 1 penetrates through a central hole of the sealing ring 6 to extend into the impeller cavity, a coupler 7 and an elastic body 8 are arranged in the impeller cavity, and lubricating oil is arranged in the impeller cavity.

In the use process of the permanent magnet synchronous drainage motor, as the gap 10 exists at the joint of the end cover 9 and the inner wall of the impeller cavity, lubricating oil in the impeller cavity can slowly flow out of the gap 10 in the use process, so that the lubricating effect and the service life of the coupler 7 and the elastomer 8 are reduced, the end cover 9 is welded on the impeller 5 through the welding head, and enough welding space is not available, therefore, the sealing of the impeller cavity can only be improved by optimizing the design of a rotor structure, and the lubricating effect and the service life of the coupler and the elastomer are ensured.

Disclosure of Invention

In order to help solve the problem that lubricating oil in an impeller cavity leaks in the use process of the existing permanent magnet synchronous drainage motor, so that the lubricating effect between a coupler and an elastic body is poor, the permanent magnet synchronous drainage motor provided by the application adopts the following technical scheme that the permanent magnet synchronous drainage motor comprises a motor shaft, a magnet, a coupler, a bearing assembly, an elastic body, an end cover and an impeller, wherein a sealing hole is formed in one end, close to the bearing assembly, of the impeller, a sealing ring is arranged in the sealing hole, an impeller cavity is formed in the other end, away from the bearing assembly, of the impeller, the motor shaft penetrates through a central hole of the sealing ring to extend into the impeller cavity, a passive rib is arranged on the surface, facing the bearing assembly, of the end cover, a welding surface is arranged on the edge of the end cover, and the end face of the impeller is welded with the welding surface.

In a specific embodiment, the face of the end cap facing the bearing assembly is provided with a plunger which is embedded in the impeller cavity and the passive rib is provided at the end of the plunger facing the impeller cavity.

In a specific embodiment, the end cap is provided with a central blind hole into which the end of the motor shaft protrudes.

In a specific embodiment, the outer edge of the coupling is provided with a dial.

In a specific embodiment, the dial is fan-shaped.

In a specific embodiment, the elastomer is in the form of a fan.

In a specific embodiment, the motor shaft and the magnet are integrally injection molded by a molding.

In a specific embodiment, the impeller and end cap are both made of a plastic material.

In a specific embodiment, the coupling is made of a metallic material

In a specific embodiment, the elastomer is made of a rubber material.

In summary, the end cover has the advantages that the end cover and the end face of the impeller are welded in the space, which is close to the bearing assembly, of the welding head in the prior art, and the end cover is embedded in the port, which is close to the bearing assembly, of the impeller cavity only, so that the sealing performance of the impeller cavity is poor.

Drawings

Fig. 1 is a schematic structural view of a rotor of a related art permanent magnet synchronous drainage motor.

Fig. 2 is a schematic cross-sectional view of an embodiment of the present application.

Fig. 3 is a schematic view of an embodiment of the application in which an end face of an impeller and a welding face are welded by a welding head.

Fig. 4 is a schematic cross-sectional view of an impeller embodying an embodiment of the present application.

FIG. 5 is a schematic cross-sectional view of a dial used to embody an embodiment of the present application.

The motor comprises a reference numeral 1, a motor shaft, a motor 2, a magnet, a plastic sealing part 3, a bearing assembly 4, a bearing assembly 5, an impeller 6, a sealing ring 7, a coupling 8, an elastomer 9, an end cover 51, a sealing hole 52, an impeller cavity 53, an end face 91, a plunger 92, a passive rib 93, a welding face 94, a central blind hole 71 and a poking block.

Detailed Description

The application is described in further detail below with reference to fig. 2-5.

The embodiment of the application discloses a permanent magnet synchronous drainage motor.

Referring to fig. 2 and 3, the permanent magnet synchronous drainage motor comprises a motor shaft 1, a magnet 2, a plastic package part 3, a bearing assembly 4, an impeller 5, an elastic body 8 and an end cover 9, wherein in the embodiment of the application, the motor shaft 1 and the magnet 2 are integrally molded through the plastic package part 3, and the connection between the motor shaft 1 and the magnet 2 is tighter due to the design of the integrally molded motor shaft and the magnet 2, so that the gap and looseness caused by assembly are reduced, the running stability of the permanent magnet synchronous drainage motor is improved, and the noise level is reduced.

Referring to fig. 3 and 4, the other end of the impeller 5, which is away from the bearing assembly 4, is provided with an impeller cavity 52, lubricating oil is provided in the impeller cavity 52, one end of the impeller 5, which is close to the bearing assembly 4, is provided with a sealing hole 51, and a sealing ring 6 is arranged in the sealing hole 51.

Referring to fig. 3 and 4, the motor shaft 1 passes through the central hole of the sealing ring 6 and stretches into the impeller cavity 52, the central holes of the motor shaft 1 and the sealing ring 6 are installed by interference fit, the central hole of the coupler 7 is pressed into the motor shaft 1 by the impeller cavity 52, the elastic body 8 is placed into the impeller cavity 52, the edge of the end cover 9 is provided with a welding surface 93, the end cover 9 is fixedly connected with a plunger 91, the plunger 91 is embedded into the impeller cavity 52, the plunger 91 is axially fixedly connected with a passive rib 92, the possibility that the end cover 9 is deviated out of the impeller cavity 52 is reduced, and the plunger 91 enhances the stability of the end cover 9 connected with the impeller 5.

Therefore, the welding head has enough welding operation space to weld the end face 53 of the impeller 5 and the welding face 93 of the edge of the end cover 9 from the top of the outer side of the impeller 5, so that the operability of the welding equipment for welding the impeller 5 and the end cover 9 is realized, the sealing performance of the impeller cavity 52 is improved, the possibility of lubricating oil loss in the impeller cavity 52 is reduced, and the lubricating effect and the service life of the coupler 7 and the elastomer 8 are ensured.

Referring to fig. 3 and 4, in order to further achieve the welding effect, the end face 53 of the impeller 5 and the welding surface 93 are welded by ultrasonic welding, in the embodiment of the present application, the impeller 5 and the end cover 9 are made of plastic materials, and the plastic materials can better fuse the impeller 5 and the end cover 9 together after ultrasonic welding. The energy generated by ultrasonic waves is transmitted to the end face 53 and the welding face 93 of the impeller 5 through the welding head, so that the circular contact faces of the end face 53 and the welding face 93 are fused together to form a whole, and the rotor performance is not affected by deformation of other parts caused by fusion while a better sealing effect is achieved.

Referring to fig. 3 and 4, the surface of the end cover 9 facing the impeller cavity 52 is provided with a central blind hole 94, the end of the motor shaft 1 extends into the central blind hole 94, and the central blind hole 94 provides a supporting point for the end of the motor shaft 1, so that the stability of the impeller 5 during rotation is improved.

Referring to fig. 3 and 5, the coupling 7 is made of metal, a dial block 71 is protruded on the outer circumferential wall surface of the coupling 7, the dial block 71 and the elastic body 8 are in a fan shape, the dynamic performance of the coupling 7 can be balanced better by the structural design of the fan-shaped dial block 71, noise and vibration generated by unbalance are reduced, and transmission efficiency is improved. In the embodiment of the application, the elastic body 8 is made of rubber, so that the elastic body 8 has good shock absorption and buffering performance when transmitting the force.

The embodiment of the utility model has the implementation principle that when the power input of the magnet 2 rotates, the shifting block 71 pressed into the coupler 7 on the motor shaft 1 rotates along with the power input, the shifting block 71 pushes the elastic body 8 to slide in the impeller cavity 52 around the axis of the impeller 5, and the elastic body 8 pushes the passive rib 92 axially arranged on the plunger 91, so that the impeller 5 is driven to rotate. The lubricating oil in the impeller cavity 52 lubricates the coupler 7 and the elastic body 8 which move relatively so as to reduce abrasion between the coupler 7 and the elastic body 8, and the sealing structure of the impeller cavity 52 ensures that the lubricating oil cannot run off, thereby ensuring the lubrication effect and the service life of the coupler 7 and the elastic body 8.

The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.

Claims (10)

1. A permanent magnet synchronous drainage motor, characterized in that it comprises a motor shaft (1), a magnet (2), a coupling (7), a bearing assembly (4), an elastomer (8), an end cover (9) and an impeller (5), wherein one end of the impeller (5) close to the bearing assembly (4) is provided with a sealing hole (51), a sealing ring (6) is inserted into the sealing hole (51), and the other end of the impeller (5) away from the bearing assembly (4) is provided with an impeller cavity, the motor shaft (1) passes through the center hole of the sealing ring (6) and extends into the impeller cavity (52), a passive rib (92) is provided on the surface of the end cover (9) facing the bearing assembly (4), and a welding surface (93) is provided on the edge of the end cover (9), and the end surface (53) of the impeller (5) is welded to the welding surface (93). 2. The permanent magnet synchronous drainage motor according to claim 1 is characterized in that: a plunger (91) is provided on the surface of the end cover (9) facing the bearing assembly (4), the plunger (91) is embedded in the impeller cavity (52) and the passive rib (92) is arranged at one end of the plunger (91) facing the impeller cavity (52). 3. The permanent magnet synchronous drainage motor according to claim 1 is characterized in that: the end cover (9) is provided with a central blind hole (94), and the end of the motor shaft (1) extends into the central blind hole (94). 4. The permanent magnet synchronous drainage motor according to claim 1, characterized in that a shifting block (71) is provided on the outer edge of the coupling (7). 5. The permanent magnet synchronous drainage motor according to claim 4, characterized in that: the shifting block (71) is fan-shaped. 6. The permanent magnet synchronous drainage motor according to claim 1, characterized in that the elastic body (8) is fan-shaped. 7. The permanent magnet synchronous drainage motor according to claim 1, characterized in that the motor shaft (1) and the magnet (2) are injection molded into one piece through a plastic sealing part (3). 8. The permanent magnet synchronous drainage motor according to claim 1, characterized in that the impeller (5) and the end cover (9) are both made of plastic material. 9. The permanent magnet synchronous drainage motor according to claim 1, characterized in that the coupling (7) is made of metal material. 10. The permanent magnet synchronous drainage motor according to claim 1, characterized in that the elastic body (8) is made of rubber material.