CN214465084U

CN214465084U - Shaft seal assembly for corrosion-resistant and wear-resistant centrifugal pump

Info

Publication number: CN214465084U
Application number: CN202120471834.6U
Authority: CN
Inventors: 蒋龙福; 郭丹枫
Original assignee: Yixing Zeus Pump Manufacture Co ltd
Current assignee: Yixing Zeus Pump Manufacture Co ltd
Priority date: 2021-03-04
Filing date: 2021-03-04
Publication date: 2021-10-22
Anticipated expiration: 2031-03-04

Abstract

The utility model relates to a centrifugal pump preparation field especially relates to an anticorrosive wear-resisting shaft seal subassembly for centrifugal pump, installs axle sleeve, mechanical seal in the centrifugal pump main shaft, and mechanical seal includes rotating ring and quiet ring, and the axle sleeve includes axle sleeve portion and rotating ring support portion, both built-up connection, and axle sleeve portion is metal material, and rotating ring support portion is anticorrosive wear-resisting material. The problems of temperature resistance, wear resistance and corrosion resistance of the movable ring support part of the container type mechanical seal are solved, the quality of the container type mechanical seal is improved in the prior art, and the safety and reliability of the centrifugal pump for conveying high-temperature, high-corrosion and high-wear-resistance chemical slurry are also improved.

Description

Shaft seal assembly for corrosion-resistant and wear-resistant centrifugal pump

Technical Field

The utility model relates to a centrifugal pump preparation field especially relates to abrasion-resistant shaft seal subassembly.

Background

When the corrosion-resistant and wear-resistant centrifugal pump is used for conveying slurry containing hydrochloric acid and hydrofluoric acid, a common shaft seal is an internal mechanical seal, and the external mechanical seal is not suitable for conveying slurry containing a large amount of particulate matters.

The rotating friction of the moving ring support part of the built-in mechanical seal is generated by the contact with the conveyed slurry, which causes two problems: firstly, the moving ring support part has the problem of corrosion prevention; the other is the wear-resisting problem of the movable ring support part. The metal material such as stainless steel cannot resist the corrosion of hydrochloric acid and hydrofluoric acid, so the metal material cannot be used for the movable ring holder.

Chinese patent application number201922089343.0Discloses an internal packaging mechanical seal with a movable ring support made of non-metal materials: the movable ring support is made of phenolic glass fiber reinforced plastic, plastic and other hot-melt injection plastic and metal shaft sleeve combination. The mechanical seal with the structure solves the problem of corrosion resistance of the slurry to be conveyed, but for conveying slurry with high concentration, strong corrosion and high abrasion containing particles, the problem that the moving ring support is not abrasion-resistant is also generated, the problem of abrasion resistance of the moving ring support when the centrifugal pump conveys slurry with high concentration and strong corrosion can not be effectively solved, and particularly the problem of abrasion resistance of the moving ring support when the centrifugal pump conveys high-temperature slurry with the temperature of more than 100 ℃, so that the mechanical seal still has room for improvement.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art not enough, provide a centrifugal pump suitable for carry the thick liquid of high temperature more than 100 ℃, the abrasion resistance of hoist seal movable ring portion greatly, and then extension mechanical seal's life.

For realizing the purpose of the utility model, the following technical proposal is provided: the utility model provides a shaft seal assembly for anticorrosive wear-resisting centrifugal pump, installs axle sleeve, mechanical seal on the centrifugal pump main shaft, and mechanical seal includes rotating ring and quiet ring, and its characterized in that axle sleeve includes axle sleeve portion and rotating ring support portion, and both built-up connection, axle sleeve portion are metal material, and rotating ring support portion is anticorrosive wear-resisting material.

Preferably, the connecting ends of the shaft sleeve part and the movable ring holding part are coupled with each other.

Preferably, the connecting end of the shaft sleeve part and the movable ring support part is provided with a pouring cavity which is communicated with each other, and a solid body is poured in the pouring cavity.

Preferably, the solid is a resin, adhesive, casting rubber, nylon or thermoplastic.

Preferably, the casting cavity is a hole, ring, groove or channel.

Preferably, the movable ring support part is made of casting material, and the movable ring support part and the shaft sleeve part are molded by casting.

The utility model discloses beneficial effect: the utility model discloses a temperature resistant, wear-resisting, the corrosion resistant problem of the rotating ring support portion of collection dress formula machine seal has been solved to the technique, in original technique, has promoted the quality of collection dress formula machine seal, has also promoted security, the reliability of carrying the centrifugal pump of high temperature, high corruption, high wear-resisting chemical slurry.

Drawings

Fig. 1 is a schematic view of a sealing structure of embodiment 1 of the present invention.

Fig. 2 is a schematic structural view of the sleeve sleeved on the movable ring support in embodiment 2.

FIG. 3 is a schematic structural diagram of embodiment 3.

Detailed Description

Example 1: as shown in figure 1, a container type centrifugal pump mechanical seal comprises a main shaft, a shaft sleeve sleeved on the main shaft, a shaft sleeve fixing ring sleeve 11 for fixing the shaft sleeve, a sealing gland 10 connected with a pump shell, a sealing box 6 fixedly connected with the sealing gland 10, a spring seat 19 connected with the sealing box, a pushing spring 8, a static ring anti-rotation snap ring 9, a static ring 5 and a dynamic ring 2, wherein the shaft sleeve comprises a shaft sleeve part 1 and a dynamic ring support part 3, the shaft sleeve part 1 is inserted in the dynamic ring support part 3, a pouring cavity communicated with each other is formed at the connecting end of the shaft sleeve part and the dynamic ring support part, a solid body is poured in the pouring cavity, the shaft sleeve part is made of 304 stainless steel, the pouring cavity is a hole 1.1, and the dynamic ring support part 3 is made of 15-20% zirconia or alumina ceramic, the solid body is made of epoxy resin through the processes of pressure forming, green body cutting, sintering forming, finish machining and the like, and the concrete construction steps are as follows: after the shaft sleeve part 1 and the movable ring support part 3 are machined, the shaft sleeve part 1 and the movable ring support part 3 are positioned and fixed by a tool fixture, epoxy resin is poured into a sleeving part of the shaft sleeve part 1 and the movable ring support part, after the epoxy resin is cured, the shaft sleeve part 1 and the movable ring support part 3 are fixedly connected together, and then corrective fine micromachining is carried out to obtain an integral shaft sleeve with metal strength at one end and good wear resistance at one end, and the integral shaft sleeve can resist corrosion and temperature. The parts of other machine seals in the embodiment 1 have no difference with the manufacture of the prior art and have no special requirements, and the machine seals can be assembled only after the parts are manufactured according to the figures in sequence.

Example 2: referring to embodiment 1, as shown in fig. 2, the remaining features are unchanged, and the sleeve portion 1 is sleeved on the movable ring holding portion 3.

In the

embodiment

1 or 2, the boss portion 1 can be made of various metal materials such as stainless steel and carbon steel.

In

embodiment

1 or 2, the movable ring support 3 may be made of non-metallic wear-resistant materials such as alumina, zirconia, and silicon carbide, or may be made of an alloy material with excellent corrosion-resistant and wear-resistant functions, and the material of the movable ring support is different from that of the shaft sleeve, and the connection method of solid body casting and fastening is adopted, which is within the scope of the present invention.

Example 3: referring to example 1, as shown in fig. 3, the rest features are unchanged, and the movable ring holder 3 is an integral structure in which silicon carbide powder or other mineral particles are mixed with resin and then directly poured on the boss 1, and directly fixed with the boss 1. The specific implementation method comprises the following steps: the method comprises the steps of adding 20% of epoxy resin into particles of 75-80 parts of silicon carbide particles according to the solid phase binding proportion of 800 meshes 3 parts, 300-500 meshes 3 parts and 100-200 meshes 4 parts, stirring and mixing, then forming a mold fixing shaft sleeve part 1, casting and molding an integral shaft sleeve 1 and a movable ring support 3 by a vibration casting or vacuum casting method, curing, obtaining a shaft sleeve metal structure after processing, wherein the movable ring support is a combined shaft sleeve cast with silicon carbide materials, and the shaft sleeve can also be suitable for conveying slurry with high abrasive requirements and has the advantage of convenience in manufacturing.

The silicon carbide powder particles in the casting body described in embodiment 3 may also be made of other wear-resistant and corrosion-resistant mineral materials, such as quartz sand, alumina, and ceramic powder, and the materials may be selected as long as they have wear-resistant and corrosion-resistant functions, which is not limited in the present invention.

Claims

1. The utility model provides a shaft seal assembly for anticorrosive wear-resisting centrifugal pump, installs axle sleeve, mechanical seal on the centrifugal pump main shaft, and mechanical seal includes rotating ring and quiet ring, and its characterized in that axle sleeve includes axle sleeve portion and rotating ring support portion, and both built-up connection, axle sleeve portion are metal material, and rotating ring support portion is anticorrosive wear-resisting material.

2. The shaft seal assembly for the corrosion-resistant and wear-resistant centrifugal pump according to claim 1, wherein the connecting ends of the shaft sleeve portion and the movable ring support portion are coupled with each other.

3. The shaft seal assembly for the corrosion-resistant and wear-resistant centrifugal pump according to claim 1, wherein a casting cavity which is communicated with each other is formed at the connecting end of the shaft sleeve part and the movable ring support part, and a solid body is cast in the casting cavity.

4. An anti-corrosive wear-resistant shaft seal assembly for centrifugal pumps according to claim 3, wherein the solid body is a resin, an adhesive, a casting rubber, a nylon or a thermoplastic material.

5. A shaft seal assembly for an anti-corrosion and wear-resistant centrifugal pump according to claim 3, wherein the casting cavity is a hole, ring, groove or trench.

6. The shaft seal assembly for an anticorrosive wear-resistant centrifugal pump according to claim 3, wherein the rotating ring holder portion is made of a casting material, and the rotating ring holder portion and the shaft sleeve portion are molded by casting.