CN220850116U

CN220850116U - Instant dry grinding resistant dry gas mechanical seal for pump

Info

Publication number: CN220850116U
Application number: CN202322485720.9U
Authority: CN
Inventors: 王海荣; 李海阳; 童慧
Original assignee: JIANGSU GOLDEN EAGLE FLUID MACHINERY CO Ltd
Current assignee: JIANGSU GOLDEN EAGLE FLUID MACHINERY CO Ltd
Priority date: 2023-09-13
Filing date: 2023-09-13
Publication date: 2024-04-26
Anticipated expiration: 2033-09-13

Abstract

The utility model discloses a dry gas mechanical seal for a pump, which can resist instantaneous dry grinding, and comprises a shell, a pipeline and a shaft sleeve, wherein one end of the shaft sleeve extends to the inside of the shell, a thrust shaft is slidably arranged in the shaft sleeve, one end of the thrust shaft extends to the inside of the pipeline and is provided with an elastic reset structure, the top end and the bottom end of the elastic reset structure are both provided with steel ball rolling structures, the surface of the thrust shaft is provided with a ball guide structure, and the outer wall on one side of the thrust shaft is provided with a pulley block structure. According to the utility model, through the mutual matching of the ball guide structure and the pulley block structure, the thrust shaft slides in the shaft sleeve more stably, the friction resistance is smaller, the thrust shaft can resist instant dry grinding, the thrust shaft is always positioned at the center line position in the sliding process, the stability is higher, and the situation that the sealing performance is poor due to the fact that the elastic reset structure shifts in the sliding process is effectively avoided through the arrangement of the ball rolling structure.

Description

Instant dry grinding resistant dry gas mechanical seal for pump

Technical Field

The utility model relates to the technical field of dry gas sealing, in particular to a dry gas mechanical sealing element for a pump, which can resist instant dry grinding.

Background

The dry gas seal is a novel non-contact shaft seal, mainly uses the dry gas seal to seal gas or liquid medium in a rotary machine, and compared with mechanical contact type seal and floating ring oil film seal, the dry gas seal can omit a seal oil system and eliminate some related common problems, and has the characteristics of less leakage, low energy consumption, low maintenance, no pollution of sealed fluid by oil and the like. A dry gas seal mechanism as disclosed in the grant publication number CN211852804U, comprising a rotating shaft; the shaft sleeve is sleeved with a shell; a sliding push ring is arranged in the shell, the push ring is sleeved on the shaft sleeve, and an elastic element is arranged between the push ring and the bottom of the inner cavity; the push ring and the inner wall of the shell are provided with sliding guide pieces; one end of the push ring, which is away from the elastic element, is connected with a static ring, and the static ring is sleeved on the shaft sleeve; the push ring is provided with a first inclined plane in a forming way, and the stationary ring is provided with a second inclined plane corresponding to the first inclined plane in a forming way; the static ring deviates from the one end of second inclined plane and is connected with the rotating ring, all takes shape the sealed face of adaptation on static ring, the rotating ring, and the rotating ring is fixed on the periphery of axle sleeve, the static ring can be in the inner chamber of casing along the axial stable slip of pivot, prevent that the sealed face that static ring and rotating ring meet from taking place to skew and not coincide, lead to sealed not tight or the phenomenon of inefficacy to appear, but the contact surface that this dry gas seal mechanism produced at the during operation makes the spare part easily resists the removal, thereby produce the energy loss, long-time friction still can make part surface produce wearing and tearing, long-term accumulation can lead to the damage or the destruction of this dry gas seal mechanism, reduce the life of equipment.

Disclosure of utility model

The utility model aims to provide a dry gas mechanical seal for a pump, which can resist instant dry grinding, so as to solve the problem that the dry gas mechanical seal in the background art generates high-strength friction force during working to influence the sealing effect.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a dry gas mechanical seal spare for pump that can be resistant dry grinding in twinkling of an eye, includes the casing, the internally mounted of casing has the pipeline, air inlet and gas outlet are installed respectively at the both ends of pipeline, install the axle housing on the outer wall of casing one side, the axle sleeve is installed to the inside one end of axle housing, the one end of axle sleeve extends to the inside of casing, the inside slidable mounting of axle sleeve has the thrust shaft, the one end of thrust shaft extends to the inside of pipeline and is provided with the elasticity reset structure, the top and the bottom of elasticity reset structure all are provided with steel ball rolling structure, the surface of thrust shaft is provided with ball guide structure, be provided with the assembly pulley structure on the outer wall of thrust shaft one side.

Preferably, the elastic reset structure comprises a circular concave seat arranged on the outer wall of one side of the thrust shaft and a base arranged on the inner wall of one side of the shell, a spring is arranged on the outer wall of one side of the circular concave seat, and one end of the spring, far away from the circular concave seat, is fixedly connected with the base.

Preferably, the steel ball rolling structure comprises a T-shaped bracket arranged at the top end of the circular ring concave seat, a plurality of steel ball monomers are rotatably arranged at the top end of the T-shaped bracket, and a sliding groove II for sliding the steel ball monomers is arranged at the top of the shell.

Preferably, the ball guiding structure comprises a plurality of ball monomers arranged on the surface of the thrust shaft and a plurality of round fixing frames which are equidistantly and rotatably arranged in the ball monomers, and the round fixing frames are in rolling contact with the outer wall of the thrust shaft and the inner wall of the shaft sleeve.

Preferably, the pulley block structure comprises a connecting block arranged on the outer wall of one side of the thrust shaft, a plurality of moving frames are hinged to the outer wall of the periphery of the connecting block, the moving frames are symmetrical about the X-axis center line of the connecting block, and pulley monomers are rotatably arranged at one ends, far away from the connecting block, of the moving frames.

Preferably, a plurality of sliding grooves I for sliding the pulley monomers are formed in the inner wall of one side of the shaft sleeve, and a sealing ring is arranged on the outer wall of one side of the pipeline.

Compared with the prior art, the utility model has the beneficial effects that: according to the dry gas mechanical sealing piece for the pump, which can resist instant dry grinding, the elastic reset structure is pushed to move through gas, the thrust shaft is driven to slide in the shaft sleeve in the moving process of the elastic reset structure, the ball guide structure is matched to reduce friction resistance when the thrust shaft slides in the shaft sleeve, the thrust shaft is enabled to be more stable in the horizontal sliding process through the pulley block structure, and meanwhile, the steel ball rolling structure slides at the top and the bottom of the shell respectively; through setting up ball guide structure and assembly pulley structure's mutually supporting for thrust shaft is more steady when sliding in the axle sleeve, and frictional resistance is littleer, can bear the dry-milling in the twinkling of an eye, makes the thrust shaft be in central line position always in the slip in-process moreover, and stability is higher, effectively avoids elasticity reset structure to appear the position deviation and lead to the condition emergence that the leakproofness is relatively poor in the slip in-process through setting up the steel ball rolling structure.

Drawings

FIG. 1 is a schematic view of a front cross-sectional structure of a spring according to the present utility model;

FIG. 2 is a schematic side view of the thrust shaft of the present utility model;

FIG. 3 is a schematic view of a front cross-sectional structure of the spring of the present utility model when contracted;

fig. 4 is a schematic side view of the sleeve of the present utility model.

In the figure: 1. a housing; 2. a pipe; 3. an air inlet; 4. an air outlet; 5. a shaft housing; 6. a shaft sleeve; 7. a thrust shaft; 8. a circular ring concave seat; 9. a spring; 10. a base; 11. a T-shaped bracket; 12. a steel ball monomer; 13. a ball monomer; 1301. a circular fixing frame; 14. a connecting block; 15. a first chute; 16. a moving rack; 17. a pulley monomer; 18. and (3) sealing rings.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, an embodiment of the present utility model is provided: the utility model provides a dry gas mechanical seal spare for pump that can bear dry grinding in twinkling of an eye, including casing 1, the internally mounted of casing 1 has pipeline 2, install sealing washer 18 on the outer wall of one side of pipeline 2, air inlet 3 and gas outlet 4 are installed respectively to the both ends of pipeline 2, install hub 5 on the outer wall of casing 1 one side, axle sleeve 6 is installed to the inside one end of hub 5, be provided with a plurality of spout one 15 that supplies pulley monomer 17 to slide on the inner wall of hub 6 one side, the one end of axle sleeve 6 extends to the inside of casing 1, thrust shaft 7 is installed to the inside slip of axle sleeve 6, thrust shaft 7's one end extends to the inside of pipeline 2 and is provided with elastic reset structure, elastic reset structure's top and bottom all are provided with steel ball rolling structure, it supports elastic reset structure when the frictional force of during operation also to reduce elastic reset structure through steel ball rolling structure, avoid because of long-time use the part sags and reduces sealed effect;

The surface of the thrust shaft 7 is provided with a ball guide structure, the outer wall of one side of the thrust shaft 7 is provided with a pulley block structure, the friction force generated by the thrust shaft 7 in the shaft sleeve 6 is effectively reduced through the pulley block structure, the sensitivity of the elastic reset structure is improved, and the smooth circulation of gas can be realized;

The elastic reset structure comprises a circular concave seat 8 arranged on the outer wall of one side of the thrust shaft 7 and a base 10 arranged on the inner wall of one side of the shell 1, a spring 9 is arranged on the outer wall of one side of the circular concave seat 8, one end of the spring 9, which is far away from the circular concave seat 8, is fixedly connected with the base 10, when a large amount of gas pushes the circular concave seat 8, the circular concave seat 8 compresses the spring 9 on the base 10, so that the flow area of the gas in the pipeline 2 is enlarged, and when the gas stops inputting, the circular concave seat 8 automatically resets under the elastic action of the spring 9 to seal the pipeline 2;

The steel ball rolling structure comprises a T-shaped bracket 11 arranged at the top end of the circular ring concave seat 8, a plurality of steel ball monomers 12 are rotatably arranged at the top end of the T-shaped bracket 11, a second chute for sliding the steel ball monomers 12 is arranged at the top of the shell 1, when the circular ring concave seat 8 moves, the T-shaped bracket 11 drives the plurality of steel ball monomers 12 to slide at the top of the shell 1 and the top respectively, the circular ring concave seat 8 is assisted to move and simultaneously plays a supporting role on the circular ring concave seat 8, the influence caused by vibration, shaking and other conditions of the circular ring concave seat 8 is reduced, and the shockproof capacity of the circular ring concave seat 8 is improved;

The ball guiding structure comprises a plurality of ball monomers 13 arranged on the surface of the thrust shaft 7 and a plurality of round fixing frames 1301 which are equidistantly and rotatably arranged in the ball monomers 13, wherein the round fixing frames 1301 are in rolling contact with the outer wall of the thrust shaft 7 and the inner wall of the shaft sleeve 6, when the thrust shaft 7 slides, the plurality of ball monomers 13 arranged on the surface of the thrust shaft 7 synchronously roll, so that abrasion generated when the thrust shaft 7 slides in the shaft sleeve 6 is reduced, energy loss and heat are reduced, and in addition, the positions among the plurality of ball monomers 13 are mutually limited through the round fixing frames 1301, and the ball monomers 13 are effectively prevented from sliding out of a track in the rolling process;

The pulley block structure includes the connecting block 14 of installing on the outer wall of thrust shaft 7 one side, the articulated a plurality of removes frame 16 on the outer wall all around of connecting block 14, a plurality of removes frame 16 and is symmetrical structure about the X axle central line of connecting block 14, remove the one end rotation that the connecting block 14 was kept away from to frame 16 and install pulley monomer 17, when thrust shaft 7 stretches connecting block 14, drive four pulley monomers 17 through four and slide to pipeline 2's direction, thereby carry out the position to the thrust shaft 7 in the removal and inject, guarantee that thrust shaft 7 is in central line position all the time.

When the embodiment of the application is used, firstly, a worker inputs gas from the gas inlet 3, when a large amount of gas floods into the pipeline 2, the elastic reset structure is pushed to move along the horizontal direction until the gas can escape from the gas outlet 4, wherein the thrust shaft 7 is driven to slide in the shaft sleeve 6 in the moving process of the elastic reset structure, and as the outer peripheral surface of the thrust shaft 7 is provided with a plurality of ball guide structures, the friction resistance of the thrust shaft 7 when the thrust shaft 7 slides in the shaft sleeve 6 is reduced by being matched with the plurality of ball guide structures when the thrust shaft 7 moves, the mechanical efficiency is improved, the thrust shaft 7 is not easy to creep when moving stably and at a low speed, in addition, the pulley block structure arranged on the outer wall on one side of the thrust shaft 7 slides on the inner wall on one side of the shaft sleeve 6, so that the thrust shaft 7 is always kept at the central line position in the horizontal sliding process, the situation that the gas is not circulated due to shaking is avoided, and the rolling structures arranged at the top end and bottom end of the elastic reset structure slide at the top and bottom of the top of the elastic reset structure respectively at the same time of the movement of the elastic reset structure, and the elastic reset structure is assisted to slide.

Claims

1. A dry gas mechanical seal for a pump that is resistant to instantaneous dry grinding, characterized by: including casing (1), internally mounted of casing (1) has pipeline (2), air inlet (3) and gas outlet (4) are installed respectively at the both ends of pipeline (2), install hub shell (5) on the outer wall of casing (1) one side, axle sleeve (6) are installed to the inside one end of hub shell (5), the one end of axle sleeve (6) extends to the inside of casing (1), the inside slidable mounting of axle sleeve (6) has thrust shaft (7), the one end of thrust shaft (7) extends to the inside of pipeline (2) and is provided with elastic reset structure, elastic reset structure's top and bottom all are provided with steel ball rolling structure, the surface of thrust shaft (7) is provided with ball guide structure, be provided with the assembly pulley structure on the outer wall of thrust shaft (7) one side.

2. A dry gas mechanical seal for a pump resistant to instantaneous dry grinding as set forth in claim 1 wherein: the elastic reset structure comprises a circular concave seat (8) arranged on the outer wall of one side of the thrust shaft (7) and a base (10) arranged on the inner wall of one side of the shell (1), a spring (9) is arranged on the outer wall of one side of the circular concave seat (8), and one end, far away from the circular concave seat (8), of the spring (9) is fixedly connected with the base (10).

3. A dry gas mechanical seal for a pump resistant to instantaneous dry grinding as set forth in claim 2 wherein: the steel ball rolling structure comprises a T-shaped bracket (11) arranged at the top end of a circular ring concave seat (8), a plurality of steel ball monomers (12) are rotatably arranged at the top end of the T-shaped bracket (11), and a sliding groove II for sliding the steel ball monomers (12) is arranged at the top of the shell (1).

4. A dry gas mechanical seal for a pump resistant to instantaneous dry grinding as set forth in claim 1 wherein: the ball guide structure comprises a plurality of ball monomers (13) arranged on the surface of the thrust shaft (7) and a plurality of round fixing frames (1301) which are arranged inside the ball monomers (13) in an equidistant rotation mode, wherein the round fixing frames (1301) are in rolling contact with the outer wall of the thrust shaft (7) and the inner wall of the shaft sleeve (6).

5. A dry gas mechanical seal for a pump resistant to instantaneous dry grinding as set forth in claim 1 wherein: the pulley block structure comprises a connecting block (14) arranged on the outer wall of one side of a thrust shaft (7), a plurality of movable frames (16) are hinged to the outer wall of the periphery of the connecting block (14), the movable frames (16) are symmetrical structures relative to the X-axis center line of the connecting block (14), and pulley monomers (17) are rotatably arranged at one end, far away from the connecting block (14), of the movable frames (16).

6. The instantaneous dry-wear resistant dry gas mechanical seal for pumps of claim 5, wherein: the inner wall of one side of the shaft sleeve (6) is provided with a plurality of sliding grooves I (15) for sliding the pulley monomers (17), and the outer wall of one side of the pipeline (2) is provided with a sealing ring (18).