CN212899112U

CN212899112U - Novel double-end-face mechanical sealing structure

Info

Publication number: CN212899112U
Application number: CN202021624498.6U
Authority: CN
Inventors: 赵立盛
Original assignee: Dalian Songlong Pump Mading Co ltd
Current assignee: Dalian Shuanglong Pump Group Co ltd
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2021-04-06
Anticipated expiration: 2030-08-07

Abstract

The utility model discloses a novel double mechanical seal structure, its characterized in that: the sealing structure comprises a ring seat (2) sleeved outside a pump shaft (1), wherein the ring seat (2) is connected with a rotating ring (4) through an anti-rotation pin (3), sealing rings (5) are arranged between the ring seat (2) and the pump shaft (1) and between the rotating ring (4) and the ring seat (2), the sealing structure further comprises two sealing shells (7) symmetrically arranged on a gland (6), an elastic piece (8), a push ring (9) and a compensation ring (10) are sequentially arranged in each sealing shell (7), the compensation rings (10) in the two sealing shells (7) are respectively in contact with two end faces of the rotating ring (4), a sealing ring (5) is also arranged between each compensation ring (10) and the corresponding sealing shell (7), and a flushing hole (11) is further formed in the gland (6).

Description

Novel double-end-face mechanical sealing structure

Technical Field

The utility model relates to a seal structure, especially a novel two terminal surface mechanical seal structure.

Background

The mechanical seal is a common seal structure, and the main principle of the mechanical seal is that a rotating ring and a static ring rotate relatively to seal a medium under the action of elastic force.

In the field of coal chemical industry, media in rotating shaft equipment are generally high-viscosity media such as tar, and ammonia water tar emulsion can corrode elastic elements. In the field of water pumps such as industrial water, various solid particles and the like are often contained in a medium, so that an elastic element is blocked, and mechanical sealing is failed.

Under dangerous goods operating modes such as petroleum and petrochemical industry, the application of double-end mechanical seal is more and more common, but because an end face is added, the installation and maintenance cost of the mechanical seal and the cost of spare parts warehouse are increased in a certain sense.

There is therefore a need for a method or apparatus that addresses the above-mentioned problems.

Disclosure of Invention

The utility model relates to a solve the above-mentioned not enough that prior art exists, provide a simple structure, design benefit, rationally distributed, under the prerequisite of guaranteeing sealed effect, greatly reduced installation and maintenance cost's double mechanical seal structure.

The technical solution of the utility model is that: the utility model provides a novel double mechanical seal structure which characterized in that: the sealing structure comprises a ring seat 2 sleeved outside a pump shaft 1, wherein the ring seat 2 is connected with a rotating ring 4 through an anti-rotation pin 3, sealing rings 5 are arranged between the ring seat 2 and the pump shaft 1 and between the rotating ring 4 and the ring seat 2, the sealing structure further comprises two sealing shells 7 symmetrically arranged on a gland 6, an elastic part 8, a push ring 9 and a compensation ring 10 are sequentially arranged in each sealing shell 7, the compensation rings 10 in the two sealing shells 7 are respectively contacted with two end faces of the rotating ring 4, the sealing rings 5 are also arranged between the compensation rings 10 and the sealing shells 7, and a flushing hole 11 is further formed in the gland 6.

Compared with the prior art, the utility model, have following advantage:

this kind of structural style's novel two terminal surfaces mechanical seal structure, its simple structure, design benefit, rationally distributed, it is loaded down with trivial details to the manufacturing process that traditional two terminal surfaces formula mechanical seal structure exists in the use, a great deal of problems such as maintenance cost height design a special structure. Only one rotating ring is matched with two compensating rings, so that key parts are omitted, the overall cost of the sealing structure is reduced, and the workload of installation and maintenance is reduced; the design of the opposite and bilateral symmetry of a static molded surface and the design of a common rotating ring is adopted, so that the pressure self-balance can be realized; the sealing shell is integrally stamped, is produced in batch, can be interchanged in use, reduces stock spare parts and can effectively save cost; the static ring is wrapped and protected by the sealing shell and does not rotate along with the shaft, the impact on the static ring is relatively small, and the static ring is particularly suitable for working conditions with high viscosity and particles. Therefore, the method has multiple advantages, is particularly suitable for popularization and application in the field, and has very wide market prospect.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

The following description will explain embodiments of the present invention with reference to the drawings. As shown in fig. 1: the utility model provides a novel double-ended mechanical seal structure, seal structure including cup jointing ring seat 2 outside pump shaft 1, ring seat 2 is connected with rotatory ring 4 through preventing that the round pin 3 is connected to between ring seat 2 and pump shaft 1, all be provided with sealing washer 5 between rotatory ring 4 and the ring seat 2, seal structure still including setting up two seal housing 7 on gland 6 symmetrically, all set gradually elastic component 8 in every seal housing 7, push away ring 9 and compensation ring 10, compensation ring 10 in two seal housing 7 respectively with rotatory ring 4's both ends face contact, also be provided with sealing washer 5 between compensation ring 10 and seal housing 7, flushing hole 11 has still been seted up on gland 6.

The utility model discloses novel two terminal surface mechanical seal structure's working process as follows: when the pump shaft 1 rotates, the ring seat 2 and the rotating ring 4 are driven to rotate, and the sealing shell 7 is fixedly connected to the gland 6, so that the sealing shell 7 is relatively immobile, namely the rotating ring 4 rotates relative to the compensating ring 10 in contact with two end faces of the rotating ring, and a dynamic seal with two end faces is formed;

the structure that the two compensation rings 10 share one rotating ring 4 can save axial installation controls; the double-end-face mechanical sealing structure is designed in a bilateral symmetry mode and shares the rotating ring 4, so that pressure self-balance can be realized; the rotating ring 4 is a hard ring, including but not limited to a silicon carbide ring, a hard alloy ring, etc.; the compensating ring 4 does not rotate along with the pump shaft 1, so that the impact is relatively small, and a soft ring including but not limited to graphite, polytetrafluoroethylene and the like is adopted.

The elastic part 8 for compensation is arranged in the sealing shell 7, and the sealing ring 5 is arranged between the compensation ring 4 and the sealing shell 7, so that the elastic part 8 can not be contacted with a medium, and the blocking failure and the medium corrosion can be effectively prevented; the elastic member 8 here includes, but is not limited to, various types of springs and bellows.

The sealing shell 7 is formed by integral stamping, is produced in batches, can be interchanged in use, reduces stock spare parts and can effectively save cost.

The rotating ring 4 is arranged on the ring seat 2 and then integrally arranged on the pump shaft 1. The pump shaft rotates along with the rotation of the pump shaft 1, and a sealing ring 5 is adopted at the static sealing point to realize sealing.

The gland 6 is separately processed and connected with the sealing shell 7 by fasteners such as bolts and the like; a flushing hole 11 is formed in the gland 6, and a subsequent flushing system can be connected and sealed through the flushing hole 11, so that the service life of the mechanical seal is prolonged.

Claims

1. The utility model provides a novel double mechanical seal structure which characterized in that: the sealing structure comprises a ring seat (2) sleeved outside a pump shaft (1), wherein the ring seat (2) is connected with a rotating ring (4) through an anti-rotation pin (3), sealing rings (5) are arranged between the ring seat (2) and the pump shaft (1) and between the rotating ring (4) and the ring seat (2), the sealing structure further comprises two sealing shells (7) symmetrically arranged on a gland (6), an elastic piece (8), a push ring (9) and a compensation ring (10) are sequentially arranged in each sealing shell (7), the compensation rings (10) in the two sealing shells (7) are respectively in contact with two end faces of the rotating ring (4), a sealing ring (5) is also arranged between each compensation ring (10) and the corresponding sealing shell (7), and a flushing hole (11) is further formed in the gland (6).