CN217712902U

CN217712902U - Mechanical seal structure for permanent magnet motor pump

Info

Publication number: CN217712902U
Application number: CN202222064440.6U
Authority: CN
Inventors: 李梦阳; 王宗红; 魏洪涛; 孙志霞
Original assignee: Zhejiang Luxi Seal Co ltd
Current assignee: Zhejiang Luxi Seal Co ltd
Priority date: 2022-08-08
Filing date: 2022-08-08
Publication date: 2022-11-01
Anticipated expiration: 2032-08-08

Abstract

The utility model belongs to the technical field of motor pumps, in particular to a mechanical seal structure for a permanent magnet motor pump, which comprises a pump cover and a pump shaft of the permanent magnet motor pump, wherein the pump shaft penetrates through the pump cover, the surface of the pump cover protrudes outwards to form a protruding ring, a seal ring is arranged inside the protruding ring, and a seal assembly is arranged outside the seal ring; through the magnetic force between extrusion ring and the magnetic ring, make the inside of extrusion ring insertion recess, and then the extrusion sealing washer makes its outside of tightly laminating the pump shaft to still receive extrusion laminating pump shaft after the sealing washer wearing and tearing, improve the leakproofness, the life of extension sealing washer.

Description

Mechanical seal structure for permanent magnet motor pump

Technical Field

The utility model relates to a motor pump technical field specifically is a mechanical seal structure for permanent-magnet machine pump.

Background

The permanent magnet motor pump comprises a pump shell, a pump cover and a pump shaft, wherein the pump shell is connected with the pump cover in a sealing mode, one end of the pump shaft extends into the pump shell from the pump cover, and a sealing element is arranged between the pump shaft and the pump cover to prevent liquid from leaking along a gap between the pump shaft and the pump cover.

When the pump shaft rotates, the sealing element is abraded, so that the sealing performance is reduced, and the sealing element needs to be replaced after being used for a period of time; therefore, a mechanical sealing structure for a permanent magnet motor pump is provided to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In order to compensate prior art's not enough, sealing element can wear and tear when having solved the pump shaft rotation, makes sealing performance descend, uses the problem that sealing element need be changed after a period, the utility model provides a mechanical seal structure for permanent magnet motor pump.

The utility model provides a technical scheme that its technical problem adopted is: a mechanical seal structure for permanent magnet motor pump, pump cover and pump shaft including the permanent magnet motor pump, the pump shaft runs through the pump cover, the outside protruding ring that forms in surface of pump cover, the internally mounted of protruding ring has the sealing washer, the externally mounted of sealing washer has seal assembly, install the interception subassembly on the protruding ring, the interception subassembly includes two adapter sleeves, adapter sleeve fixed mounting is in the outer wall department of protruding ring, the internal rotation of adapter sleeve is connected with fixed cover.

Preferably, the sealing assembly comprises an annular groove and a magnetic ring, the groove is formed in the surface of the sealing ring, the cross section of the groove is trapezoidal, and the magnetic ring is fixedly installed on the inner wall of the protruding ring.

Preferably, the inside of recess is provided with the extrusion ring, the cross section of extrusion ring sets up to trapezoidal, and the extrusion ring adopts ferromagnetic material to make, and through the magnetic force between extrusion ring and the magnetic ring, makes the extrusion ring insert the inside of recess, and then extrudees the sealing washer and makes its outside that tightly laminates the pump shaft to still receive extrusion laminating pump shaft after the sealing washer wearing and tearing, improve the leakproofness, prolong the life of sealing washer.

Preferably, the inside sliding connection of fixed cover has the U-shaped frame, the U-shaped frame is located the inside one end fixedly connected with extension spring of fixed cover, the one end fixed mounting that the U-shaped frame was kept away from to the extension spring is in the outer wall department of bellying ring.

Preferably, a plurality of solid fixed rings of outer wall fixedly connected with of extrusion ring, the U-shaped frame inserts solid fixed ring's inside through the elastic force of extension spring, and then carries on spacingly to the extrusion ring to improve the extrusion force of extrusion ring and sealing washer, improve the leakproofness, avoid the great extrusion ring that leads to of pump body level rocking range to drop simultaneously.

Preferably, the sealing ring is made of an ethylene propylene diene monomer material, and the ethylene propylene diene monomer material has good wear resistance and can prolong the service life of the sealing ring.

The utility model discloses an useful part lies in:

1. the utility model discloses a magnetic force between extrusion ring and the magnetic ring makes the extrusion ring insert the inside of recess, and then extrudees the sealing washer and makes its outside of tightly laminating the pump shaft to still receive extrusion laminating pump shaft after the sealing washer wearing and tearing, improve the leakproofness, prolong the life of sealing washer.

2. The utility model discloses a U-shaped frame inserts solid fixed ring's inside through the elastic force of extension spring, and then carries on spacingly to the extrusion ring to improve the extrusion force of extrusion ring and sealing washer, improve the leakproofness, avoid the great extrusion ring that leads to of pump body level range of rocking to drop simultaneously.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a cross-sectional view of the pump cover of the present invention;

FIG. 3 is a schematic structural view of the sealing assembly of the present invention;

FIG. 4 is a schematic view of the structure of the intercepting component of the present invention;

fig. 5 is a sectional view of the fixing sleeve of the present invention.

In the figure: 1. a pump cover; 2. a pump shaft; 3. a raised ring; 4. a seal ring; 5. a seal assembly; 51. a groove; 52. a magnetic ring; 53. an extrusion ring; 54. a fixing ring; 6. an interception component; 61. connecting sleeves; 62. fixing a sleeve; 63. a U-shaped frame; 64. a tension spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example one

Referring to fig. 1-5, a mechanical seal structure for a permanent magnet motor pump includes a pump cover 1 and a pump shaft 2 of the permanent magnet motor pump, where the pump shaft 2 penetrates through the pump cover 1, the surface of the pump cover 1 protrudes outward to form a protruding ring 3, a seal ring 4 is installed inside the protruding ring 3, a seal assembly 5 is installed outside the seal ring 4, an intercepting assembly 6 is installed on the protruding ring 3, the intercepting assembly 6 includes two connecting sleeves 61, the connecting sleeves 61 are fixedly installed on the outer wall of the protruding ring 3, and a fixing sleeve 62 is rotatably connected inside the connecting sleeves 61.

The sealing assembly 5 comprises an annular groove 51 and a magnetic ring 52, the groove 51 is arranged on the surface of the sealing ring 4, the cross section of the groove 51 is trapezoidal, and the magnetic ring 52 is fixedly arranged on the inner wall of the raised ring 3.

The extrusion ring 53 is arranged in the groove 51, the cross section of the extrusion ring 53 is trapezoidal, the extrusion ring 53 is made of ferromagnetic materials, the extrusion ring 53 is inserted into the groove 51 through the magnetic force between the extrusion ring 53 and the magnetic ring 52, the sealing ring 4 is further extruded to be tightly attached to the outer portion of the pump shaft 2, the sealing ring 4 is still attached to the pump shaft 2 through extrusion after being worn, the sealing performance is improved, and the service life of the sealing ring 4 is prolonged.

The inside sliding connection of fixed cover 62 has U-shaped frame 63, U-shaped frame 63 is located the inside one end fixedly connected with extension spring 64 of fixed cover 62, the one end fixed mounting that U-shaped frame 63 was kept away from to extension spring 64 is in the outer wall department of bellied ring 3.

The outer wall of the extrusion ring 53 is fixedly connected with a plurality of fixing rings 54, the U-shaped frame 63 is inserted into the fixing rings 54 through the elastic force of the tension springs 64, the extrusion ring 53 is limited, the extrusion force of the extrusion ring 53 and the sealing ring 4 is improved, the sealing performance is improved, and the extrusion ring 53 is prevented from falling off when the horizontal shaking amplitude of the pump body is large.

The sealing ring 4 is made of an ethylene propylene diene monomer material, and the ethylene propylene diene monomer material has good wear resistance and can prolong the service life of the sealing ring 4.

According to the working principle, the extrusion ring 53 is inserted into the groove 51 through the magnetic force between the extrusion ring 53 and the magnetic ring 52, so that the sealing ring 4 is extruded to be tightly attached to the outside of the pump shaft 2, and the sealing ring 4 is still extruded to be attached to the pump shaft 2 after being worn, the sealing performance is improved, and the service life of the sealing ring 4 is prolonged;

u-shaped frame 63 inserts the inside of solid fixed ring 54 through the elastic force of extension spring 64, and then carries on spacingly to extrusion ring 53 to improve extrusion ring 53 and sealing washer 4's extrusion force, improve the leakproofness, avoid the great extrusion ring 53 that leads to of the pump body horizontal shaking range to drop simultaneously.

In the description of the present specification, reference to the description of "one embodiment," "an example," "a specific example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the basic principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a mechanical seal structure for permanent-magnet machine pump, includes pump cover (1) and pump shaft (2) of permanent-magnet machine pump, pump shaft (2) run through pump cover (1), its characterized in that: the outside arch in surface of pump cover (1) forms protruding ring (3), the internally mounted of protruding ring (3) has sealing washer (4), the externally mounted of sealing washer (4) has seal assembly (5), install interception subassembly (6) on protruding ring (3), interception subassembly (6) include two adapter sleeve (61), adapter sleeve (61) fixed mounting is in the outer wall department of protruding ring (3), the internal rotation of adapter sleeve (61) is connected with fixed cover (62).

2. The mechanical seal structure for the permanent magnet motor pump according to claim 1, characterized in that: the sealing assembly (5) comprises an annular groove (51) and a magnetic ring (52), the groove (51) is formed in the surface of the sealing ring (4), the cross section of the groove (51) is trapezoidal, and the magnetic ring (52) is fixedly installed on the inner wall of the protruding ring (3).

3. The mechanical seal structure for the permanent magnet motor pump according to claim 2, characterized in that: an extrusion ring (53) is arranged in the groove (51), the cross section of the extrusion ring (53) is trapezoidal, and the extrusion ring (53) is made of ferromagnetic materials.

4. The mechanical seal structure for the permanent magnet motor pump according to claim 1, characterized in that: the inside sliding connection of fixed cover (62) has U-shaped frame (63), U-shaped frame (63) are located fixed inside one end fixedly connected with extension spring (64) of cover (62), the one end fixed mounting that U-shaped frame (63) was kept away from in extension spring (64) is in the outer wall department of protruding ring (3).

5. The mechanical seal structure for the permanent magnet motor pump according to claim 3, characterized in that: the outer wall of the extrusion ring (53) is fixedly connected with a plurality of fixing rings (54).

6. The mechanical seal structure for the permanent magnet motor pump according to claim 1, characterized in that: the sealing ring (4) is made of ethylene propylene diene monomer rubber material.