CN216554344U

CN216554344U - Sealing structure of eccentric pump spindle sleeve and shell

Info

Publication number: CN216554344U
Application number: CN202123264265.7U
Authority: CN
Inventors: 马健峰; 任荣杰; 伍俊; 陈庆
Original assignee: CECEP TECHNOLOGY INVESTMENT CO LTD; CECEP Engineering Technology Research Institute Co Ltd
Current assignee: CECEP TECHNOLOGY INVESTMENT CO LTD; CECEP Engineering Technology Research Institute Co Ltd
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-05-17
Anticipated expiration: 2031-12-23

Abstract

The utility model relates to the technical field of pump body sealing, in particular to a sealing structure of a main shaft sleeve and a shell of an eccentric pump. The novel vibration reducer is characterized by comprising a shell, wherein a sliding groove is formed in the shell, a main shaft sleeve and an eccentric shaft are arranged in the shell, the main shaft sleeve is arranged on the outer side of the eccentric shaft, the eccentric shaft drives the main shaft sleeve to reciprocate along the inner side surface of the shell when rotating, a guide column is arranged on the main shaft sleeve, one end of the guide column is connected with the main shaft sleeve, the other end of the guide column is located in the sliding groove, a sealing element is arranged on the outer side surface of the main shaft sleeve, and when the main shaft sleeve reciprocates, the sealing element is in fit sealing with the inner wall of the shell. This technical scheme is used for solving among the prior art because the sealed effect between main shaft cover and the casing is not good, makes high pressure chamber and low pressure chamber communicate at main shaft cover reciprocating motion's in-process, causes the problem to the conveying effect variation of medium.

Description

Sealing structure of eccentric pump spindle sleeve and shell

Technical Field

The utility model relates to the technical field of pump body sealing, in particular to a sealing structure of a main shaft sleeve and a shell of an eccentric pump.

Background

In the petroleum industry of China at present, crude oil, natural gas, water, silt, floccules and various viscous substances are difficult to realize single pipeline multiphase mixed transportation, so that a large amount of repeated construction, repeated investment and serious environmental pollution and social resource waste caused by casing gas discharge are caused.

Most of the existing hybrid transportation devices adopt an eccentric pump, an eccentric shaft in the eccentric pump drives a main shaft sleeve to reciprocate on the inner wall of a shell, and the main shaft sleeve can dynamically separate the interior of the shell into a high-pressure cavity and a low-pressure cavity so as to achieve the purpose of regulating the pressure and flow of an input end and an output end. In the moving process of the main shaft sleeve, the linear contact between the rotor and the inner wall of the shell needs to be kept at any time, otherwise, when the main shaft sleeve does not reach the set position, media between the high-pressure cavity and the low-pressure cavity can be exchanged, and the problem of poor transportation effect can be caused.

SUMMERY OF THE UTILITY MODEL

In view of the above technical deficiencies, an object of the present invention is to provide a sealing structure for a main shaft sleeve and a housing of an eccentric pump, so as to solve the problem in the prior art that a high pressure chamber and a low pressure chamber are communicated during a reciprocating motion of the main shaft sleeve due to a poor sealing effect between the main shaft sleeve and the housing, thereby deteriorating a transportation effect of a medium.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

a sealing structure of a main shaft sleeve and a shell of an eccentric pump comprises the shell, wherein a sliding groove is formed in the shell, the main shaft sleeve and an eccentric shaft are arranged in the shell, the main shaft sleeve is arranged on the outer side of the eccentric shaft, the eccentric shaft drives the main shaft sleeve to reciprocate along the inner side face of the shell when rotating, a guide column is arranged on the main shaft sleeve, one end of the guide column is connected with the main shaft sleeve, the other end of the guide column is located in the sliding groove, a sealing element is arranged on the outer side face of the main shaft sleeve, and when the main shaft sleeve reciprocates, the sealing element is in fit sealing with the inner wall of the shell.

Further, the sealing element is in the shape of a sealing layer, and the sealing layer completely covers the outer side face of the spindle sleeve.

Further inject, the sealing member is a plurality of sealing strips, the sealing strip is evenly fixed on the lateral surface of the main shaft sleeve, and is arranged in parallel with the axial direction of the main shaft sleeve.

Further, the material of the sealing element is carbon fiber with elasticity.

Further defined, the sealing layer has a thickness of at least 5 mm.

Further defined, the sealing strip has a thickness of at least 5 mm.

Further defined, the sealing member is in a compressed state when the sealing member is in a snug seal with the inner wall.

Further, the eccentric shaft comprises a rotating shaft and a fixed wheel eccentrically fixed on the rotating shaft, and the outer surface of the fixed wheel is connected with the inner surface of the main shaft sleeve.

Further inject, be equipped with the recess on the lateral surface of spindle sleeve, be equipped with the lug on the sealing member, lug and recess joint.

The beneficial effects that this technical scheme got are as follows:

(1) the main shaft sleeve is provided with the sealing element made of the carbon fiber material, the main shaft sleeve is always kept in fit with the inner wall of the shell when swinging in a reciprocating mode, the main shaft sleeve is linearly in fit with the inner wall of the shell in the reciprocating swinging mode, stable cavity sealing can be achieved, meanwhile, the sealing element made of the carbon fiber material has corrosion resistance, wear resistance and good deformation ductility, can be better adapted to a complex petroleum mixed medium, pump efficiency is improved, high pump efficiency is kept for a long time, and processing difficulty and cost are reduced. (2) Compared with the prior art, the sealing structure is simplified, and the processing difficulty and cost are reduced.

Drawings

FIG. 1 is a schematic view of a spindle cover sealing mechanism in this embodiment;

FIG. 2 is a schematic view of a prior art seal on a spindle cover;

fig. 3 is a detailed schematic diagram of a prior art seal.

The device comprises a shell 1, a sliding chute 2, a main shaft sleeve 3, a fixed wheel 4, a rotating shaft 5, a sealing component 6, a U-shaped groove 6.1, a rubber block 6.2, a copper bar 6.3, a sealing layer 7 and a guide column 8.

Detailed Description

The following is further detailed by way of specific embodiments:

example 1

As shown in fig. 1, a sealing structure of a main shaft sleeve and a shell of an eccentric pump comprises a shell 1, a chute 2 is arranged on the shell 1, a medium inlet and a medium outlet are also arranged on the shell, a main shaft sleeve 3 and an eccentric shaft are arranged inside the shell 1, the main shaft sleeve 3 is arranged outside the eccentric shaft, when the eccentric shaft rotates, the main shaft sleeve 3 is driven to reciprocate along the inner side surface of the shell 1, a guide post 8 is arranged on the main shaft sleeve 3, one end of the guide post 8 is connected with the main shaft sleeve 3, the connection modes of the guide post 8 are mainly two in the prior art, the first makes the guide post 8 and the main shaft sleeve 3 elastically contact, the second makes the main shaft and the main shaft sleeve 3 fixedly connected, the other end of the guide post 8 is positioned in the chute 2 (if the second mode is adopted, the lower part of the chute 2 is provided with a chamfer angle), a sealing element is arranged on the outer side surface of the main shaft sleeve 3, when the main shaft sleeve 3 reciprocates, the sealing element is sealed with the inner wall of the shell 1, the position of the fit seal refers to the position of the spindle sleeve 3 closest to the shell, and one point position is guaranteed to be fitted and sealed all the time.

The shape of the seal is a seal layer 7, and the seal layer 7 entirely covers the outer side surface of the spindle cover 3. The material of the sealing element is carbon fiber with elasticity, and the sealing layer 7 is made of carbon fiber. The sealing layer 7 has a thickness of at least 5 mm. When the sealing element is in fit sealing with the inner wall, the sealing element is in a pressing state. The eccentric shaft comprises a rotating shaft 5 and a fixed wheel 4 eccentrically fixed on the rotating shaft 5, and the outer surface of the fixed wheel 4 is connected with the inner surface of the main shaft sleeve 3.

The main shaft sleeve 3 is coated with the sealing element made of the carbon fiber material, so that the main shaft sleeve 3 always keeps in fit (contact part) with the inner wall of the shell 1 when swinging back and forth, and the main shaft sleeve 3 always linearly fits with the inner wall of the shell 1 in the reciprocating swinging operation, stable cavity sealing can be realized, meanwhile, the sealing element made of the carbon fiber material has corrosion resistance, wear resistance and good deformation ductility, can better adapt to complex petroleum mixed media, improves the pumping efficiency, keeps high pumping efficiency for a long time, and reduces the processing difficulty and cost.

The outer side surface of the main shaft sleeve 3 is provided with a groove, the sealing element 7 is provided with a convex block, the convex block is clamped with the groove, and the clamping mode of the sealing layer and the sealing strip with the main shaft sleeve 3 is not difficult to understand, so that redundant description is omitted. Of course, adhesive bonding or other means of securing the sealing layer or strip to the spindle cover 3 may be used.

As shown in fig. 2 and 3, in the prior art, the sealing member 6 between the spindle sleeve 3 and the housing 1 includes a plurality of U-shaped grooves 6.1 arranged on the outer side of the spindle sleeve 3, an elastic rubber strip 6.2 is placed in the U-shaped grooves 6.1, and a T-shaped copper strip 6.3 is embedded at the outer end of the rubber strip 6.2, so that the copper strip 6.3 forms a linear engagement point with the pump housing, and the copper strips 6.3 of the plurality of U-shaped grooves 6.1 can ensure that the spindle sleeve 3 always has a point to be engaged with the inner wall of the housing 1 during the reciprocating motion, but in the using process, if the sealing effect is good, the contact between the copper strip 6.3 and the housing 1 is tight, so the sealing manner easily causes the wear of the housing 1 or the copper strip 6.3, which causes the problem of the sealing effect to be poor, and at the same time, such manner can only ensure the engagement sealing with the housing to a certain extent, and in the long-term operation, it is difficult to ensure that the fitting seal is formed with the housing at all times, and there are problems in that the structure is complicated and the processing is difficult, and therefore, improvement of the sealing member 6 is required.

Example 2

The difference between the embodiment 2 and the embodiment 1 lies in that the shape of the sealing element and the installation mode on the spindle cover 3 are different, specifically, the sealing element in the embodiment 2 is a plurality of sealing strips, and the sealing strips are uniformly fixed on the outer side surface of the spindle cover 3 and are arranged in parallel to the axial direction of the spindle cover 3.

It should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used broadly in the present invention, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The sealing structure comprises a shell and is characterized in that a sliding groove is formed in the shell, a main shaft sleeve and an eccentric shaft are arranged in the shell, the main shaft sleeve is arranged on the outer side of the eccentric shaft, the eccentric shaft drives the main shaft sleeve to reciprocate along the inner side face of the shell when rotating, a guide column is arranged on the main shaft sleeve, one end of the guide column is connected with the main shaft sleeve, the other end of the guide column is located in the sliding groove, a sealing element is arranged on the outer side face of the main shaft sleeve, and when the main shaft sleeve reciprocates, the sealing element is in fit sealing with the inner wall of the shell.

2. The sealing structure of the eccentric pump spindle cover and the housing according to claim 1, wherein a groove is formed on the outer side surface of the spindle cover, and a protrusion is formed on the sealing member and is engaged with the groove.

3. The sealing structure of the eccentric pump spindle cover and the casing as claimed in claim 2, wherein the sealing member is in the shape of a sealing layer, and the sealing layer completely covers the outer side surface of the spindle cover.

4. The sealing structure of the main shaft sleeve and the shell of the eccentric pump according to claim 2, wherein the sealing elements are a plurality of sealing strips, and the sealing strips are uniformly fixed on the outer side surface of the main shaft sleeve and are arranged in parallel to the axial direction of the main shaft sleeve.

5. A sealing structure of a main shaft sleeve and a shell of an eccentric pump according to claim 3 or 4, characterized in that the material of the sealing element is carbon fiber with elasticity.

6. A sealing structure of a main shaft sleeve and a shell of an eccentric pump according to claim 3, wherein the thickness of the sealing layer is at least 5 mm.

7. The sealing structure of the eccentric pump spindle cover and the casing according to claim 4, wherein the thickness of the sealing strip is at least 5 mm.

8. A seal arrangement for a main shaft sleeve and a housing of an eccentric pump according to claim 1, wherein said seal is compressed when said seal is in a snug seal with an internal wall.

9. The sealing structure of the main shaft sleeve and the housing of the eccentric pump of claim 1, wherein the eccentric shaft comprises a rotating shaft and a fixed wheel eccentrically fixed to the rotating shaft, and an outer surface of the fixed wheel is connected to an inner surface of the main shaft sleeve.