WO2020168781A1

WO2020168781A1 - Wavy bushing assembly device for long-shaft vertical submerged pump

Info

Publication number: WO2020168781A1
Application number: PCT/CN2019/123016
Authority: WO
Inventors: 郑鑫; 王项羽; 王双庆
Original assignee: 烟台龙港泵业股份有限公司
Priority date: 2019-02-21
Filing date: 2019-12-04
Publication date: 2020-08-27
Also published as: CN109779924B; CN109779924A

Abstract

A wavy bushing assembly device for a long-shaft vertical submerged pump, comprising a motor (1), mutually connected pipelines and a pump shaft connected with the pipelines, a sliding bearing body (5) is arranged at the connection of the pipelines, a pump body (61) is arranged on one end of the pump shaft, and a wavy bushing assembly (7) is respectively arranged above the pump body (61) and inside the sliding bearing body (5); the wavy bushing assembly (7) comprises a bushing (71) and a shaft sleeve (72) which are sleeved with each other, a wavy concave groove (711) is formed in the inner side of the bushing (71), a wavy convex groove (721) abutting against the wavy concave groove (711) is formed in the outer side of the shaft sleeve (72), the bushing (71) is fixedly connected with the sliding bearing body (5), the shaft sleeve (72) is fixedly connected with the pump shaft, and a wear-resistant material is arranged at the contact of the bushing (71) and the shaft sleeve (72).

Description

Wave-type bushing assembly device for long-axis vertical submerged pump

Technical field

The invention relates to the technical field of engineering pumps, in particular to a wave-type bushing assembly device for a long-axis vertical submerged pump.

Background technique

At present, the petrochemical industry has widely used long-shaft vertical submersible pumps. Bushings and bushing devices are used as components to protect the pump shaft from direct contact and friction with other components, which are extremely easy to damage in engineering use. This is usually due to the fact that traditional bushings and bushings are in surface contact, and the medium conveyed in the chemical industry will be mixed with particulates. When fine particles enter between the bushing and the bushing with the medium, the two components are aggravated. Caused by wear and tear.

In summary, the existing technology obviously has inconvenience and defects in actual use, so it is necessary to improve it.

Summary of the invention

In view of the above-mentioned defects, the purpose of the present invention is to provide a wave-type bushing assembly device for a long-axis vertical sump pump, which can reduce the friction between parts, prolong its service life, and reduce manufacturing costs.

In order to achieve the above objective, the present invention provides a wave-type bushing assembly device for a long-axis vertical submerged pump, which includes a motor, a supporting device, interconnected pipes, and a pump shaft connecting the pipes. The pipe joints are installed There is a sliding bearing body, a pump body is installed at one end of the pump shaft, and a wave type bushing assembly is installed above the pump body and the sliding bearing body; the wave type bushing assembly includes bushings sleeved with each other And a sleeve, the inner side of the sleeve is provided with a wave-shaped groove, the outer side of the sleeve is provided with a wave-shaped convex groove that abuts the wave-shaped groove, and the sleeve is fixedly connected to the sliding bearing body, the shaft The sleeve is fixedly connected to the pump shaft. The heights of the wave-shaped grooves and the wave-shaped convex grooves are respectively 1/3 to 1/7 of the wall thickness of the bushing and the bushing. Grinding materials.

According to the wave-type bushing assembly device for a long-axis vertical submerged pump according to the present invention, the pipeline includes an upper connecting pipe and a lower connecting pipe, the pump shaft includes an upper pump shaft and a lower pump shaft, and the pump body is connected with Pump cover and impeller.

According to the wave-shaped bushing assembly device for a long-axis vertical submerged pump according to the present invention, the wave-shaped groove is a longitudinal wave-shaped groove or a horizontal wave-shaped groove, and the wave-shaped convex groove is a longitudinal wave-shaped groove Convex groove or transverse wave-shaped convex groove.

According to the wave-type bushing assembly device for a long-axis vertical submerged pump according to the present invention, the wave-shaped grooves and wave-shaped convex grooves are distributed regularly by sine or involutes with rounded convex points. .

According to the wave-shaped bushing assembly device for a long-axis vertical submersible pump according to the present invention, the wave-shaped grooves or wave-shaped convex grooves regularly distributed on the involute line have a pressure angle of 30°, respectively Take 1/5 of the wall thickness as the addendum height, and the addendum radius is the fillet of 1/5 the addendum height.

According to the wave-type bushing assembly device for a long-axis vertical submerged pump according to the present invention, the height of the wave-shaped groove and the wave-shaped convex groove are respectively 1/5 of the wall thickness of the bushing and the bushing.

According to the wave-type bushing assembly device for a long-axis vertical submerged pump according to the present invention, the wear-resistant material is SiC and/or C.

The present invention provides a wave-type bushing assembly device for a long-axis vertical submerged pump, which includes a motor, a supporting device, a pipe connected to each other and a pump shaft connected to the pipe, and a sliding bearing body is installed at the pipe connection. A pump body is installed at one end of the pump shaft, and a wave type bushing assembly is installed above the pump body and the sliding bearing body; the wave type bushing assembly includes a bushing and a bushing that are sleeved with each other, so The inner side of the bushing is provided with a wave-shaped groove, the outer side of the shaft sleeve is provided with a wave-shaped convex groove that abuts the wave-shaped groove, and the bushing is fixedly connected to the sliding bearing body, and the shaft sleeve is fixedly connected to the pump shaft The heights of the wave-shaped grooves and the wave-shaped convex grooves are respectively 1/3 to 1/7 of the wall thickness of the bushing and the bushing, and the contact part of the bushing and the bushing is provided with wear-resistant materials. The invention has the advantages of simple structure, reliable design, and easy operation. By setting wave grooves, the contact mode is changed from surface contact to point contact, which reduces the friction area between the traditional form of bushing and bushing; Multiple channels are formed between the wave grooves of the sleeve, so that when the particles are present in the conveyed medium, the particles can flow out of the gap between the sleeve and the bushing along the gap with the conveying medium, which greatly reduces the sleeve under such conditions. In addition to the wear of the bushing, at the same time, the wave grooves are arranged in a sinusoidal distribution or an involute regular distribution with the tooth tip as a fillet. The structure is stable and the force is uniform, which prolongs the service life of the parts and reduces the use cost.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the present invention;

Figure 2 is a schematic diagram of the structure of the shaft sleeve of the present invention;

Figure 3 is a schematic diagram of the structure of the bushing of the present invention;

Figure 4 is a schematic diagram of the group and structure of the wave-type bushing assembly of the present invention;

In the figure, 1-motor, 21-support, 22-support plate, 31-upper tube, 32-lower tube, 41-upper pump shaft, 42-lower pump shaft, 5-sliding bearing body, 61-pump body , 62- pump cover, 63- impeller, 7- wave bushing assembly, 71- bushing, 711- wave groove, 72- shaft sleeve, 721- wave convex groove.

detailed description

In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used Limit the invention.

Referring to Figures 1 to 4, the present invention provides a wave-type bushing assembly device for a long-axis vertical submersible pump, which includes a motor 1, a supporting device, interconnected pipes and a pump shaft connecting the pipes. A sliding bearing body 5 is installed at the connection, a pump body 61 is installed at one end of the pump shaft, and a wave type bushing assembly 7 is installed above the pump body 61 and in the sliding bearing body 5; the wave type shaft The bushing assembly 7 includes a bushing 71 and a bushing 72 that are sleeved with each other. The inner side of the bushing 71 is provided with a wave-shaped groove 711, and the outer side of the bushing 72 is provided with a wave-shaped convex that abuts against the wave-shaped groove 711. Groove 721, and the bushing 71 is fixedly connected to the sliding bearing body 5, the bushing 72 is fixedly connected to the pump shaft, and the wavy groove 711 and the wavy convex groove 721 have a height of the bushing 71 and the bushing respectively 1/3 to 1/7 of the wall thickness of 72, wear-resistant materials are provided at the contact between the bushing 71 and the bushing 72.

Preferably, the pipeline of the present invention includes an upper connecting pipe 31 and a lower connecting pipe 32. The pump shaft includes an upper pump shaft 41 and a lower pump shaft 42. The pump body 61 is connected with a pump cover 62 and an impeller 63. The upper connecting pipe 31 and the lower connecting pipe 32 effectively convey the conveying medium to ensure conveying efficiency and conveying effect.

In addition, the wave-shaped groove 711 of the present invention is a longitudinal wave-shaped groove or a horizontal wave-shaped groove, and the wave-shaped convex groove 721 is a longitudinal wave-shaped convex groove or a horizontal wave-shaped convex groove. The groove 711 and the wave-shaped convex groove 721 reduce the friction between the bushing 71 and the bushing 72, thereby prolonging the service life of various parts and reducing the manufacturing cost.

Further, the wave-shaped grooves 711 and the wave-shaped convex grooves 721 of the present invention are both sine regular distribution or involute regular distribution with convex points as rounded corners, and wavy concaves with sine regular distribution or involute regular distribution are adopted. The groove 711 or the wave-shaped convex groove 721 turns the plane friction between the bushing 71 and the bushing 72 into point friction, which reduces the friction force and prolongs the service life.

More preferably, the involute regularly distributed wave-shaped grooves 711 or wave-shaped convex grooves 721 of the present invention all use 30° as the graduated pressure angle, and take 1/5 of the wall thickness as the tooth top height. The radius is 1/5 of the fillet height of the tooth tip, the structure is more stable, and the force is even, which can effectively extend the service life of the parts and reduce the use cost.

During the implementation of the present invention, the motor 1 at one end of the pipeline is used to drive the pipeline and the pump body 61 connected to the pipeline to achieve work, so that it can transmit and transport the liquid required in the chemical industry. During the transportation, in order to prevent Large friction is generated between the pump shaft and the sliding bearing body 5, so a wave-type bushing assembly 7 is installed on the sliding bearing body 5 and the pump cover 62. The protrusion height of the wave-shaped groove 711 and the wave-shaped convex groove 721 (as shown in FIG. 4, h is the height of the protrusion) are respectively 1/5 of the wall thickness of the bushing 71 and the bushing 72. The material is SiC and/or C, and SiC and/or C are used as wear-resistant materials, which can effectively protect the apex of the wave-shaped groove 711 and the wave-shaped convex groove 721, enhance their friction, and effectively protect the parts . In the working process, the wave-shaped groove 711 and the wave-shaped convex groove 721 are in contact through the convex part, thereby reducing the contact area, reducing the friction force, and extending the service life of the parts. Because the wave crests and wave bottoms formed by the wave-shaped grooves 711 and the wave-shaped convex grooves 721 can accommodate the liquid flow, and the space formed between the wave crests and the wave bottoms can effectively flow the impurities inside the liquid, thereby reducing The retention of impurities in the wave-shaped bushing assembly 7 is reduced, the friction between the bushing 71 and the bushing 72 is reduced, and its service life is prolonged.

In summary, the present invention provides a wave-type bushing assembly device for a long-axis vertical submersible pump, which includes a motor, a supporting device, interconnected pipes, and a pump shaft connecting the pipes. The pipe joints are installed There is a sliding bearing body, a pump body is installed at one end of the pump shaft, and a wave type bushing assembly is installed above the pump body and the sliding bearing body; the wave type bushing assembly includes bushings sleeved with each other And a sleeve, the inner side of the sleeve is provided with a wave-shaped groove, the outer side of the sleeve is provided with a wave-shaped convex groove that abuts the wave-shaped groove, and the sleeve is fixedly connected to the sliding bearing body, the shaft The sleeve is fixedly connected to the pump shaft. The heights of the wave-shaped grooves and the wave-shaped convex grooves are respectively 1/3 to 1/7 of the wall thickness of the bushing and the bushing. Grinding materials. The invention has the advantages of simple structure, reliable design, and simple operation. By setting wave grooves, the contact mode is changed from surface contact to point contact, which reduces the friction area between the traditional form of bushing and bushing; Multiple channels are formed between the wave grooves of the sleeve, so that when the particles are present in the conveyed medium, the particles can flow out of the gap between the sleeve and the bushing along the gap with the conveying medium, which greatly reduces the sleeve under such conditions. In addition to the wear of the bushing, at the same time, the wave grooves are arranged in a sinusoidal distribution or an involute regular distribution with the tooth tip as a fillet. The structure is stable and the force is uniform, which prolongs the service life of parts and reduces the use cost.

Of course, the present invention can also have various other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding All changes and deformations shall belong to the protection scope of the appended claims of the present invention.

Claims

A wave-type bushing assembly device for a long-axis vertical submerged pump, comprising a motor, a supporting device, interconnected pipes and a pump shaft connecting the pipes, characterized in that a sliding bearing body is installed at the pipe connection A pump body is installed at one end of the pump shaft, and a wave-type bushing assembly is installed above the pump body and the sliding bearing body; the wave-type bushing assembly includes a bushing and a bushing that are sleeved, The inner side of the bushing is provided with a wave-shaped groove, the outer side of the sleeve is provided with a wave-shaped convex groove that abuts the wave-shaped groove, and the bushing is fixedly connected to the sliding bearing body, and the shaft sleeve is fixedly connected to the pump For the shaft, the heights of the wave-shaped grooves and the wave-shaped convex grooves are respectively 1/3 to 1/7 of the wall thickness of the bushing and the bushing, and wear-resistant materials are provided at the contact between the bushing and the bushing.
The wave-type bushing assembly device for a long-axis vertical sump pump according to claim 1, wherein the pipeline includes an upper joint and a lower joint, and the pump shaft includes an upper pump shaft and a lower pump shaft , The pump body is connected with a pump cover and an impeller.
The wave-shaped bushing assembly device for a long-axis vertical sump pump according to claim 1, wherein the wave-shaped groove is a longitudinal wave-shaped groove or a horizontal wave-shaped groove, and the wave The convex groove is a longitudinal wave-shaped convex groove or a horizontal wave-shaped convex groove.
The wave-shaped bushing assembly device for a long-axis vertical submersible pump according to claim 3, wherein the wave-shaped grooves and wave-shaped convex grooves are distributed in a sine law or a convex point is a circle. The involute of the angle is distributed regularly.
The wave-shaped bushing assembly device for a long-axis vertical submersible pump according to claim 4, wherein the wave-shaped grooves or wave-shaped convex grooves with regular distribution of involutes are all set at 30° The pressure angle of the index circle is the fillet with 1/5 of the wall thickness as the tooth tip height, and the tooth tip radius is 1/5 of the tooth tip height.
The wave-shaped bushing assembly device for a long-axis vertical sump pump according to claim 1, wherein the convex heights of the wave-shaped groove and the wave-shaped convex groove are the bushing and the wall of the bushing respectively 1/5 thick.
The wave-type bushing assembly device for a long-axis vertical submerged pump according to claim 1, wherein the wear-resistant material is SiC and/or C.