CN210889443U

CN210889443U - Pump shaft sealing structure of long-shaft deep-well pump

Info

Publication number: CN210889443U
Application number: CN201922093526.XU
Authority: CN
Inventors: 王锁振
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-06-30
Anticipated expiration: 2029-11-28

Abstract

The utility model provides a pump shaft sealing structure of a long-shaft deep well pump, which comprises a sealing pressure plate, a mechanical sealing element and a sealing element positioning lantern ring, wherein the pump shaft passes through the sealing pressure plate, the mechanical sealing element and the sealing element positioning lantern ring, and the mechanical sealing element comprises a static sealing ring, a dynamic sealing ring, a spring and a spring supporting plate which are sleeved outside the pump shaft and are distributed in sequence from top to bottom; the sealing element positioning lantern ring is integrally in a circular ring shape, a contraction joint which is completely broken is arranged on the ring body on one side of the sealing element positioning lantern ring, a deformation joint which cuts a half ring body is arranged on the inner side of the ring body on the other side of the sealing element positioning lantern ring, and the ring bodies on two sides of the contraction joint are connected through contraction bolts. The utility model discloses a mechanical seal spring base adopts the formula of encircleing fixed, and is difficult not hard up, can not appear the slope phenomenon, does not have the damage of jackscrew to the pump shaft, has prolonged mechanical seal's life, has reduced the use cost of maintenance of major axis deep-well pump, has simple structure, simple to operate's advantage.

Description

Pump shaft sealing structure of long-shaft deep-well pump

Technical Field

The utility model relates to a water pump technical field especially relates to a pump shaft seal structure of major axis deep-well pump.

Background

A pump shaft of the long-shaft deep-well pump and the top of the water outlet section need to be sealed by a mechanical sealing element, and a spring base of the mechanical sealing element needs to be fixed by a mechanical fastener. In the prior art, the spring base is mostly fixed in a mode that the periphery of a metal lantern ring props against the pump shaft through a plurality of bolt jackscrews, and the contact surface between the bolt jackscrew tip and the pump shaft is very small and easy to loosen. If individual screws are loosened, the spring base can be inclined, and further the abutting surface of the movable ring and the static ring is inclined to a certain extent, so that the sealing effect of the sealing device is influenced, and the service life of the mechanical sealing element is reduced; loosening of multiple screws can cause leakage in the pump body. Therefore, there is a need to provide a new sealing structure for the pump shaft of a long-shaft deep-well pump to solve the above technical problems.

Disclosure of Invention

The utility model provides a technical problem provide a pump shaft seal structure of major axis deep-well pump. The mechanical seal spring base of the sealing structure is fixed in an encircling mode, is not easy to loosen, cannot incline, is not damaged by a top thread, prolongs the service life of a mechanical seal element, reduces the use and maintenance cost of a long-shaft deep-well pump, and has the advantages of simple structure and convenience in installation.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a pump shaft seal structure of major axis deep-well pump which characterized in that: the mechanical sealing device comprises a static sealing ring, a dynamic sealing ring, a spring and a spring supporting plate which are sequentially distributed from top to bottom outside the pump shaft in a sleeved mode, wherein the static sealing ring is fixedly and hermetically connected with the sealing pressing plate, and a gap is formed between the static sealing ring and the pump shaft; the sealing element positioning collar positions the spring supporting plate, and the spring supporting plate extrudes the spring, so that the end face of the movable sealing ring extruded by the spring is seamlessly combined with the end face of the static sealing ring; the whole sealing element positioning lantern ring is in a circular ring shape, and a central hole of the sealing element positioning lantern ring can enable the pump shaft to pass through; a contraction joint which is completely broken is arranged on the ring body on one side of the sealing element positioning sleeve ring, a deformation joint which is used for cutting a half of the ring body is arranged on the inner side of the ring body on the other side, the contraction joint and the deformation joint are distributed in the same diameter direction of the sealing element positioning sleeve ring, and the ring bodies on two sides of the contraction joint are connected by using contraction bolts; the shrinkage bolt is screwed down to enable the sealing element positioning lantern ring to be tightly held and fixed on the pump shaft.

The pump shaft seal structure of major axis deep-well pump has prolonged mechanical seal's life through the fixed mode that changes mechanical seal. The original fixing mode of the jackscrew of the spring base is changed into the fixing mode of the jackscrew of the spring support plate combined with the positioning lantern ring of the sealing element, so that the phenomena of looseness and inclination of the spring base cannot occur, the damage of the jackscrew to the pump shaft does not exist after the jackscrew is removed, the use and maintenance cost of the long-axis deep-well pump is reduced, and the maintenance, the assembly and the disassembly of the long-axis deep-well pump are simpler.

Drawings

FIG. 1 is a schematic view of a sealing structure of a pump shaft of the long-shaft deep-well pump of the present invention;

fig. 2 is a schematic structural view of the sealing member positioning collar of the present invention;

the corresponding part names in the figure are: 1, sealing a pressure plate; 2, sealing the bolt; 3 a mechanical seal; 4 a seal positioning collar; 5, a pump shaft; 31 a static sealing ring; 32 moving sealing rings; 33 a spring; 34 a spring retainer plate; 41 shrinkage joints; 42 deformation joint; 43 contracting the bolt; 100 pump body.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, the following detailed description of the embodiments, structures, and features of the present invention will be made with reference to the accompanying drawings and preferred embodiments. The drawings are only for reference and illustration purposes and are not intended to limit the invention.

Referring to fig. 1 and 2, the present invention provides a pump shaft sealing structure of a long shaft deep well pump, including a sealing pressure plate 1 connected with a pump body 100 through a sealing bolt 2, a mechanical sealing element 3 located at the bottom of the pressure plate, and a sealing element positioning sleeve ring 4 located at the bottom of the mechanical sealing element, wherein a pump shaft 5 passes through the sealing pressure plate, the mechanical sealing element and the sealing element positioning sleeve ring, the mechanical sealing element includes a static sealing ring 31, a dynamic sealing ring 32, a spring 33 and a spring support plate 34 which are sleeved outside the pump shaft and sequentially distributed from top to bottom, the static sealing ring 31 is fixedly and sealingly connected with the sealing pressure plate 1, and a gap is provided between the static sealing ring 31 and the pump; the sealing element positioning lantern ring 4 positions the spring supporting plate 34, the spring supporting plate 34 extrudes the spring 33, and then the spring 33 extrudes the end face of the movable sealing ring 32 to be seamlessly combined with the end face of the static sealing ring 31; the whole sealing element positioning lantern ring 4 is in a circular ring shape, and the central hole of the sealing element positioning lantern ring can just enable the pump shaft 5 to penetrate through the sealing element positioning lantern ring; a completely disconnected contraction joint 41 is arranged on a ring body on one side of the sealing element positioning lantern ring 4, a deformation joint 42 for cutting a half of the ring body is arranged on the inner side of the ring body on the other side, the contraction joint and the deformation joint are distributed in the same diameter direction of the sealing element positioning lantern ring, and the ring bodies on the two sides of the contraction joint are connected by a contraction bolt 43; tightening the contraction bolt can make the sealing element positioning lantern ring 4 tightly fixed on the pump shaft 5.

Based on the pump shaft sealing structure of the long-shaft deep-well pump with the structural design, a sealing element positioning lantern ring 4, a mechanical sealing element 3 and a sealing pressure plate 1 are sequentially sleeved on the pump shaft. The sealing element positioning lantern ring 4 can be fixed only by fastening one contraction bolt 43, and the sealing pressure plate 1 is fixed on the pump body 100 by using the sealing bolt 2, so that the pump shaft sealing of the long-shaft deep-well pump can be completed. The utility model discloses a spring supporting plate combines the fixed mode of sealing member position sleeve ring, and spring base not hard up, slope phenomenon can not appear, have prolonged mechanical seal's life. After the jackscrew is removed, the pump shaft is not damaged by the jackscrew, the use and maintenance cost of the long-shaft deep-well pump is reduced, and the maintenance, the assembly and the disassembly of the long-shaft deep-well pump are simpler.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and those skilled in the art can make many variations and modifications of the technical solution of the present invention without departing from the scope of the technical solution of the present invention.

Claims

1. The utility model provides a pump shaft seal structure of major axis deep-well pump which characterized in that: the mechanical sealing device comprises a static sealing ring, a dynamic sealing ring, a spring and a spring supporting plate which are sequentially distributed from top to bottom outside the pump shaft in a sleeved mode, wherein the static sealing ring is fixedly and hermetically connected with the sealing pressing plate, and a gap is formed between the static sealing ring and the pump shaft; the sealing element positioning collar positions the spring supporting plate, and the spring supporting plate extrudes the spring, so that the end face of the movable sealing ring extruded by the spring is seamlessly combined with the end face of the static sealing ring; the whole sealing element positioning lantern ring is in a circular ring shape, and a central hole of the sealing element positioning lantern ring can enable the pump shaft to pass through; a contraction joint which is completely broken is arranged on the ring body on one side of the sealing element positioning sleeve ring, a deformation joint which is used for cutting a half of the ring body is arranged on the inner side of the ring body on the other side, the contraction joint and the deformation joint are distributed in the same diameter direction of the sealing element positioning sleeve ring, and the ring bodies on two sides of the contraction joint are connected by using contraction bolts; the shrinkage bolt is screwed down to enable the sealing element positioning lantern ring to be tightly held and fixed on the pump shaft.