CN217270870U - Sealing device for motor shaft of pipeline pump - Google Patents

Abstract

The utility model discloses a pipeline pump motor shaft sealing device has solved current motor shaft sealing device and has used the back for a long time, the problem that the liquid seal effect can not be guaranteed, the technical scheme who takes: the utility model provides a pipeline pump motor shaft sealing device for realize the liquid seal to the motor shaft, the structure includes the link, the link is used for hookup motor and the pump body, be equipped with the opening on the pump body, the link is last to have a hookup end plate, the hookup end plate is connected to be fixed on the opening, the motor shaft passes the hookup end plate and stretches into in the pump body, be equipped with sealed quiet ring between hookup end plate and motor shaft, its characterized in that, be provided with sealed rotating ring on the motor shaft axially slidable, sealed rotating ring is located the pump body, be used for when pressurized towards sealed quiet ring motion support to lean on.

Description

Sealing device for motor shaft of pipeline pump

Technical Field

The utility model relates to a pipeline pump especially relates to a sealing device for realizing liquid seal between motor shaft and the pump body in the pipeline pump.

Background

Pipeline pumps are usually required to be arranged on the fluid pipeline at intervals, so that the fluid conveyed in the fluid pipeline can be pressurized and pushed, and the remote conveying of the fluid can be realized. In order to facilitate the arrangement, the pipeline pump generally adopts a vertical structure, namely, the motor is vertically arranged relative to the arrangement direction of the pipeline, so that the arrangement direction of the pipeline does not need to be greatly changed, and the pipeline pump is conveniently arranged on a fluid pipeline.

Chinese patent document (publication: CN 214661021U) discloses a vertical pipeline pump protection device, which belongs to the technical field of pipeline pumps, the utility model discloses a pipeline pump body, flange and protective structure, the surface of pipeline pump body is equipped with two flanges, and the surface of pipeline pump body is equipped with protective structure, and protective structure includes four nuts, and the surface of four nuts all is connected with pipeline pump body rotation, and the inner wall threaded connection of nut has the rotary drum, and the inner wall sliding connection of rotary drum has the inserted bar, and the one end fixedly connected with balance plate that the nut was kept away from to the inserted bar. The utility model discloses wherein the force that the tubing pump bottom plate bore is alleviated between spring and the balance plate when the tubing pump is using for the power that the coupling part between tubing pump and the tubing pump bottom received reduces, through setting up protective structure, can reduce the power that the coupling part between tubing pump and the tubing pump base received, has avoided the coupling part between tubing pump and the tubing pump base to receive the power of more of a specified duration and fracture.

The motor shaft in the pipeline pump extends into the pump body from the outer side, an O-shaped sealing element is generally required to be arranged between the motor shaft and the pump body in order to realize liquid sealing between the motor shaft and the pump body, and liquid can be effectively sealed by the sealing element so as to prevent the pipeline pump from leaking outside the pump body when in work. However, since the motor shaft is in a moving state during operation, the requirement on the sealing performance of the O-shaped sealing element is high, and the sealing effect cannot be well guaranteed after long-term use.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem who needs the solution: the utility model provides a sealing device of pipeline pump motor shaft, this sealing device can effectively guarantee the sealed effect between the motor shaft and the pump body, and sealing performance lasts for a long time.

The technical scheme adopted for solving the technical problem is as follows: the utility model provides a pipeline pump motor shaft sealing device for realize the liquid seal to the motor shaft, the structure includes the link, the link is used for hookup motor and the pump body, be equipped with the opening on the pump body, the link has the hookup end plate on the link, the hookup end plate is connected and is fixed on the opening, the motor shaft passes the hookup end plate and stretches into in the pump body, be equipped with sealed quiet ring between hookup end plate and motor shaft, a serial communication port, be provided with sealed rotating ring axially slidable on the motor shaft, sealed rotating ring is located the pump body, be used for leaning on towards sealed quiet ring motion when pressurized.

The end fixing of motor shaft has the impeller, and when the impeller rotated under the drive of motor shaft, can carry out the pressure boost to the liquid in the pump body, and liquid pressure increases the back, can promote sealed rotating ring and move towards sealed quiet ring to under the effect of liquid pressure, sealed rotating ring supports tightly on the terminal surface of sealed quiet ring, and sealed rotating ring is to the axial application of force of sealed quiet ring, and partly can decompose the application of force to sealed quiet ring in the footpath, thereby can guarantee the sealed effect of sealed quiet ring to the motor shaft.

Furthermore, the sealing movable ring comprises a pushing piece and a supporting piece, the pushing piece and the supporting piece are both of circular ring structures, a spring is arranged between the pushing piece and the supporting piece, and the pushing piece is far away from the sealing static ring relative to the supporting piece.

Further, one end of the pushing piece, which is far away from the sealing static ring, is in a horn shape.

Furthermore, a convex ring protruding towards the interior of the pump body is arranged on the connecting end plate, and the sealing static ring is arranged in the convex ring.

Furthermore, a pair of protruding bosses are integrally formed on the surface of the connecting end plate facing the pump body, and the two bosses are connected with the convex ring into a whole and are respectively arranged on two opposite sides of the convex ring.

Furthermore, two through air openings are symmetrically arranged on two opposite sides of the motor shaft on the connecting frame, and sealing sheets are covered on the air openings and are in an arch shape.

Compared with the prior art, the utility model has the advantages that: the movable sealing ring is movably arranged on the motor shaft and can be well adapted to pressure change in the pump body, so that when the pump body is internally pressurized, the movable sealing ring can be tightly attached to the end face of the static sealing ring, and the liquid sealing effect of the static sealing ring on the motor shaft can be effectively guaranteed. Because of the abutting of the sealing movable ring, the material of the sealing static ring can be relatively soft, thereby providing a good liquid sealing effect for the motor shaft well. The sealing movable ring can adapt to the pressure change in the pump body, can adapt to the sealing requirement on the motor shaft well, has long duration time of sealing performance, and can effectively improve the environmental tidiness of the pipeline pump in the using process.

Drawings

Fig. 1 is a perspective view of the related line pump.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a schematic view of the assembly structure of the impeller and the sealing moving ring on the motor shaft.

Fig. 4 is an enlarged structural view of the seal rotating ring.

In the figure: 1. a motor; 2. a coupling frame; 21. a coupling ring; 22. an air interface; 23. connecting the end plates; 24. a boss; 25. a convex ring; 3. a pump body; 4. sealing a sheet; 5. a motor shaft; 6. sealing the movable ring; 61. pushing the workpiece; 62. a spring; 63. a support piece; 7. an impeller; 8. and sealing the static ring.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The structure of the related pipeline pump comprises a motor 1 and a pump body 3, wherein the pump body 3 is hollow, a motor shaft 5 penetrates through the pump body 3 and extends into the pump body 3, and an impeller 7 is fixed at the extending end of the pump body 3. The shaft sealing device is arranged on the periphery of the motor shaft 5 and used for realizing the liquid sealing of the motor shaft 5. The pipeline pump is arranged vertically in the using process, namely, the motor shaft 5 is positioned in the vertical direction.

The structure of the shaft sealing device comprises a connecting frame 2, and a pump body 3 and a motor 1 are connected and fixed on two opposite ends of the connecting frame 2. The pump body 3 is provided with an opening, one end of the connecting frame 2 is formed with a disc-shaped connecting end plate 23, and the other end of the connecting frame 2 is formed with a ring-shaped connecting ring 21. Wherein the connecting end plate 23 is connected and fixed on the opening in a liquid-tight manner through an O-shaped sealing ring; the coupling ring 21 is fixedly connected to the end face of the motor 1, and the motor shaft 5 penetrates through the coupling ring 21 and the coupling end plate 23 to extend into the pump body 3.

This shaft seal device is still including setting up the sealed quiet ring 8 between hookup end plate 23 and motor shaft 5, and this sealed quiet ring 8 is double-ring-shaped, wholly is the rubber material, and inside is provided with the steel skeleton. A seal moving ring 6 is axially slidably provided on the motor shaft 5, and the seal moving ring 6 is located in the pump body 3. Driven by the motor shaft 5, the impeller 7 rotates at a high speed in the pump body 3, so that the pressure in the pump body 3 is increased, the movable sealing ring 6 is pressed, the movable sealing ring 6 moves towards the stationary sealing ring 8, and the end faces of the movable sealing ring 6 and the stationary sealing ring 8 abut against each other. The structure of the part of the movable sealing ring 6 far away from the impeller 7 is similar to that of the static sealing ring 8, when the movable sealing ring 6 abuts against the static sealing ring 8, the liquid tightness between the motor shaft 5 and the static sealing ring 8 can be well improved, the higher the pressure in the pump body 3 is, the larger the abutting force between the movable sealing ring 6 and the static sealing ring 8 is, and the higher the liquid tightness is.

In fig. 3, a protruding ring 25 protruding toward the inside of the pump body 3 is provided on the coupling end plate 23, and the stationary seal ring 8 is provided in the protruding ring 25, the coupling end plate 23 does not need to be made thick, and the stationary seal ring 8 can be stably held on the coupling end plate 23. A pair of protruding bosses 24 are integrally formed on the surface of the coupling end plate 23 facing the pump body 3, and the bosses 24 are integrally connected to the collar 25 and arranged on opposite sides of the collar 25. The two bosses 24 are in a long strip shape, and the existence of the bosses 24 can well improve the strength of the connecting end plate 23 and the convex ring 25.

Referring to fig. 4, the seal moving ring 6 includes a pushing element 61 and a pressing element 63, and both the pushing element 61 and the pressing element 63 are of a circular ring structure, and the pushing element 61 is far away from the seal stationary ring 8 relative to the pressing element 63. Wherein, the end of the pushing element 61 departing from the sealing stationary ring 8 is horn-shaped, which is convenient for the stress of the pushing element 61, and the structure of the abutting element 63 is the same as that of the sealing stationary ring 8. A spring 62 is arranged between the pushing element 61 and the abutting element 63, so that the stability of the axial force applied to the abutting element 63 is good, and the abutting element 63 and the sealing stationary ring 8 can be stably abutted.

In order to reduce the weight, the connecting frame 2 is of a frame structure, two through air openings 22 are symmetrically arranged on the connecting frame 2 on two opposite sides of the motor shaft 5, a sealing sheet 4 made of stainless steel is covered on the air openings 22, the sealing sheet 4 is in an arch shape, and the sealing sheet 4 is fixedly connected to the air openings 22 through screws.

Claims (6)

1. The utility model provides a pipeline pump motor shaft sealing device for realize the liquid seal to the motor shaft, the structure includes the link, the link is used for hookup motor and the pump body, be equipped with the opening on the pump body, the link has the hookup end plate on the link, the hookup end plate is connected and is fixed on the opening, the motor shaft passes the hookup end plate and stretches into in the pump body, be equipped with sealed quiet ring between hookup end plate and motor shaft, a serial communication port, be provided with sealed rotating ring axially slidable on the motor shaft, sealed rotating ring is located the pump body, be used for leaning on towards sealed quiet ring motion when pressurized.

2. The device for sealing the motor shaft of the pipeline pump as claimed in claim 1, wherein the movable sealing ring comprises a pushing member and a pressing member, the pushing member and the pressing member are both of circular ring structures, a spring is arranged between the pushing member and the pressing member, and the pushing member is far away from the stationary sealing ring relative to the pressing member.

3. The device of claim 2, wherein the end of the pusher facing away from the stationary seal ring is flared.

4. The sealing device for the motor shaft of the pipeline pump according to claim 1, 2 or 3, wherein a convex ring protruding towards the inside of the pump body is provided on the connecting end plate, and the static sealing ring is provided in the convex ring.

5. The device of claim 4, wherein a pair of protruding bosses are integrally formed on the surface of the coupling end plate facing the pump body, the bosses being integrally connected to the collar and arranged on opposite sides of the collar.

6. The device as claimed in claim 1, 2 or 3, wherein the coupling frame is symmetrically provided with two through openings at opposite sides of the motor shaft, and the openings are covered with sealing pieces, which are in an arch shape.

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