CN111894902A

CN111894902A - Erosion-resistant isolation sleeve assembly for magnetic pump

Info

Publication number: CN111894902A
Application number: CN202010524643.1A
Authority: CN
Inventors: 吴辉; 吴杰; 吴翔; 孟金华; 王清龙; 王文汇; 唐宗清; 徐俊东
Original assignee: Anhui Yinlong Pump Valve Co ltd
Current assignee: Anhui Yinlong Pump Valve Co ltd
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2020-11-06

Abstract

The invention provides an erosion-resistant isolation sleeve assembly for a magnetic pump, which comprises an isolation sleeve, wherein the isolation sleeve comprises an inner sleeve and an outer sleeve, the inner sleeve is buckled outside a magnetic pump shaft, a sliding bearing and an inner magnetic rotor, a closed cavity is arranged between the inner sleeve and the outer sleeve, a buffer spring is arranged in the cavity, two ends of the buffer spring are respectively and fixedly connected to the inner sleeve and the outer sleeve, the isolation sleeve also comprises a resisting baffle, and the resisting baffle is fixedly arranged on the end surface of the outer sleeve, which is contacted with a medium.

Description

Erosion-resistant isolation sleeve assembly for magnetic pump

Technical Field

The invention relates to the technical field of magnetic pumps, in particular to an erosion-resistant isolation sleeve assembly for a magnetic pump.

Background

The magnetic pump consists of three parts, namely a pump, a magnetic driver and a motor. The key part magnetic driver consists of outer magnetic rotor, inner magnetic rotor and isolating sleeve without magnetic conduction. When the motor drives the outer magnetic rotor to rotate, the magnetic field can penetrate through the air gap and the nonmagnetic substance to drive the inner magnetic rotor connected with the impeller to synchronously rotate, so that the non-contact transmission of power is realized, and the dynamic seal is converted into the static seal. The pump shaft and the inner magnetic rotor are completely sealed by the pump body and the isolation sleeve, so that the problems of leakage, overflow, dripping and leakage are thoroughly solved, the potential safety hazard that inflammable, explosive, toxic and harmful media leak through the pump seal in the oil refining chemical industry is eliminated, and the physical and mental health and the safe production of workers are effectively ensured.

However, because the application range of the magnetic pump is wider, different media can be conveyed when the magnetic pump is used, and the media are firstly eroded and contacted with the isolation sleeve, different media can corrode and erode the isolation sleeve to different degrees in the long-term past, and the service life of the isolation sleeve can be greatly reduced.

And if hard particles exist in the conveyed medium, the isolation sleeve is easy to scratch or scratch, and the normal use of the magnetic pump is influenced.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to provide an erosion-resistant isolation sleeve assembly for a magnetic pump, aiming at overcoming the defects in the prior art, and effectively solving the technical problem that the isolation sleeve is easily scratched when different media erode the isolation sleeve and hard particles exist in the media when the magnetic pump conveys the media.

The technical scheme is as follows: in order to achieve the purpose, the invention provides an erosion-resistant isolation sleeve assembly for a magnetic pump, which comprises an isolation sleeve, wherein the isolation sleeve comprises an inner sleeve and an outer sleeve, the inner sleeve is buckled outside a pump shaft of the magnetic pump, a sliding bearing and an inner magnetic rotor, and the erosion-resistant isolation sleeve assembly is characterized in that: a closed cavity is arranged between the inner sleeve and the outer sleeve, a buffer spring is arranged in the cavity, and two ends of the buffer spring are fixedly connected to the inner sleeve and the outer sleeve respectively.

As an improvement of the scheme, the device further comprises a baffle plate, and the baffle plate is fixedly installed on the end face, contacted with the medium, of the outer sleeve.

As an improvement of the scheme, the end face of the outer sleeve, which is in contact with the medium, is a buffering face, and the buffering face is made of butadiene acrylonitrile rubber.

As an improvement of the scheme, the supporting and blocking piece is an aluminum sheet, the aluminum sheet is fixed on the buffering surface, and the aluminum sheet is fixedly connected with the buffering surface through bonding.

As an improvement of the scheme, the inner sleeve is provided with a fixed foot, and the isolation sleeve is fixedly arranged on the shaft of the magnetic pump through the fixed foot.

As an improvement of the scheme, a pair of fillets is further arranged on the outer sleeve.

Compared with the prior art, the invention has the following beneficial effects: according to the invention, the cavity is arranged between the outer sleeve and the inner sleeve of the isolation sleeve, the buffer spring is fixedly arranged in the cavity, the erosion and impact force of the medium on the outer sleeve are buffered by the buffer spring, so that the service life of the outer sleeve is prolonged, the outer sleeve of the isolation sleeve is provided with the buffer surface, the buffer surface is made of nitrile rubber and has certain elastic restoring force, when the medium impacts the outer sleeve of the isolation sleeve to generate erosion, the buffer surface is sunken inwards, the impact force of the medium impacting the outer sleeve of the isolation sleeve is buffered by the buffer spring in the cavity, so that the erosion of the medium on the outer sleeve of the isolation sleeve is reduced, the outer sleeve of the isolation sleeve is protected, and the service life of the isolation sleeve is.

Drawings

FIG. 1 is a schematic sectional view of the spacer sleeve;

fig. 2 is a schematic sectional structure view of the magnetic pump.

List of reference numerals: 1. a jacket; 2. an inner sleeve; 21. a fixing leg; 22. round corners; 3. a cavity; 4. a buffer surface; 5. a baffle plate; 6. a buffer spring; 7. an inner magnetic rotor; 8. an outer magnetic rotor; 9. a connecting frame; 10. a motor; 11. a pump shaft; 12. a sliding bearing; 13. an impeller; 14. and a pump body.

Detailed Description

The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

As shown in fig. 1-2, an erosion-resistant isolation sleeve assembly for a magnetic pump comprises an isolation sleeve, the isolation sleeve comprises an inner sleeve 2 and an outer sleeve 1, the inner sleeve 2 is buckled outside a magnetic pump shaft 11, a sliding bearing 12 and an inner magnetic rotor 7, an airtight cavity is arranged between the inner sleeve 2 and the outer sleeve 1, a buffer spring 6 is arranged in the cavity, two ends of the buffer spring 6 are respectively and fixedly connected to the inner sleeve 2 and the outer sleeve 1, and the isolation sleeve assembly further comprises a baffle 5, wherein the baffle 5 is fixedly installed on the outer sleeve 1 and is in contact with a medium on the end face.

In this embodiment: the end face, in contact with the medium, of the outer sleeve 1 is a buffering face 4, and the buffering face 4 is made of butadiene acrylonitrile rubber.

In this embodiment: the blocking piece is an aluminum sheet which is fixed on the buffering surface 4, and the aluminum sheet is fixedly connected with the buffering surface 4 through bonding.

In this embodiment: the inner sleeve 2 is provided with a fixing pin 21, and the isolation sleeve is fixedly arranged on the magnetic pump shaft 11 through the fixing pin 21.

In this embodiment: the outer sleeve 1 is also provided with a pair of rounded corners 22.

In the above structure: the isolating sleeve is arranged between an outer magnetic rotor 8 and an inner magnetic rotor 7 of the magnetic pump, the conveying medium is sealed in a pump cavity through a sealing ring, and the conveying medium is connected with a motor 10 through a connecting frame 9. The inner magnetic rotor 7 and the impeller 13 are of an integrated structure, one end of the pump shaft 11 is supported at the inlet of the pump body 14, and the other end face of the pump shaft is supported on the isolating sleeve; the slide bearing 12, which is used to support the weight of the inner magnet rotor 7 and the impeller 13, is made of high-strength pressureless sintered silicon carbide (SSiC).

In the above structure: the isolation sleeve is divided into an inner sleeve 2 and an outer sleeve 1, the outer sleeve 1 is buckled on the inner sleeve 2, the inner sleeve 2 is buckled outside a magnetic pump shaft 11, a sliding bearing 12 and an inner magnetic rotor 7, a cavity is arranged between the inner sleeve 2 and the outer sleeve 1 and is a closed cavity, a buffer spring 6 is fixedly installed in the cavity, two ends of the buffer spring 6 are respectively fixed on the inner sleeve 2 and the outer sleeve 1, a buffer surface 4 is arranged on the outer sleeve 1 of the isolation sleeve, the buffer surface 4 is made of nitrile rubber and has certain elastic restoring force, when a medium impacts the outer sleeve 1 of the isolation sleeve to generate erosion, the buffer surface 4 is inwards sunken and buffers the impact force of the medium impacting the outer sleeve 1 of the isolation sleeve through the buffer spring 6 in the cavity, so that the erosion of the medium to the outer sleeve 1 of the isolation sleeve is reduced, the outer sleeve 1 of the isolation sleeve is protected.

In the above structure: still fixed being provided with on buffering face 4 and keeping off board 5, keeping off board 5 is thin aluminum plate, and thin aluminum plate can prevent effectively that hard particle in the medium from directly striking on overcoat 1, leads to overcoat 1 to rip, and the medium infiltration destroys the leakproofness of magnetic drive pump, can prolong the life of isolation sleeve greatly.

The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features.

Claims

1. The utility model provides a magnetic drive pump is with resistant erosion separation sleeve assembly, includes the separation sleeve, the separation sleeve is including endotheca (2) and overcoat (1), endotheca (2) lock joint is outside magnetic drive pump shaft (11), slide bearing (12) and interior magnetic rotor (7), its characterized in that: a closed cavity is arranged between the inner sleeve (2) and the outer sleeve (1), a buffer spring (6) is arranged in the cavity, and two ends of the buffer spring (6) are fixedly connected to the inner sleeve (2) and the outer sleeve (1) respectively.

2. The erosion resistant spacer sleeve assembly of claim 1, wherein: the anti-collision device is characterized by further comprising a baffle plate (5), wherein the baffle plate (5) is fixedly arranged on the end face, contacted with the medium, of the outer sleeve (1).

3. The erosion resistant spacer sleeve assembly of claim 1, wherein: the end face, in contact with the medium, of the outer sleeve (1) is a buffering face (4), and the buffering face (4) is made of butadiene acrylonitrile rubber.

4. The erosion resistant spacer sleeve assembly of claim 3, wherein: the blocking piece is an aluminum sheet, the aluminum sheet is fixed on the buffering surface (4), and the aluminum sheet is fixedly connected with the buffering surface (4) through bonding.

5. The erosion resistant spacer sleeve assembly of claim 1, wherein: the inner sleeve (2) is provided with a fixing pin (21), and the isolation sleeve is fixedly arranged on the magnetic pump shaft (11) through the fixing pin (21).

6. The erosion resistant spacer sleeve assembly of claim 1, wherein: the outer sleeve (1) is also provided with a pair of fillets (22).