CN214742097U

CN214742097U - High-pressure double-cylinder self-balancing multistage pump

Info

Publication number: CN214742097U
Application number: CN202023264824.XU
Authority: CN
Inventors: 卫少康; 杨林; 张庆龙; 陈洪亮; 石树忠
Original assignee: Jiangsu Haishi Pumps Manufacturing Co ltd
Current assignee: Jiangsu Haishi Pumps Manufacturing Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-11-16
Anticipated expiration: 2030-12-30

Abstract

A high pressure dual barrel self balancing multistage pump comprising: the pump comprises an outer cylinder body, a liquid inlet, a liquid outlet, an end cover A, an end cover B and a pump shaft; the two ends of the outer cylinder are provided with an end cover A and an end cover B, and the liquid inlet and the liquid outlet are arranged above the outer cylinder; the impeller A and the impeller B are arranged on the pump shaft, a plurality of impellers A and impellers B which are symmetrically arranged are arranged on the part of the pump shaft positioned in the outer cylinder body, each impeller A and each impeller B are respectively positioned in a subsection body, and the subsection bodies form an inner shell; a high-pressure cavity is formed between the inner shell and the outer cylinder, and the inner shell is matched with the liquid inlet and the liquid outlet. The utility model has the advantages that the outer cylinder body is made by adopting the integral forming forging process, so the bearing performance is higher; the hydraulic pressure in the high-pressure cavity is higher than that in the independent sectional bodies, and the sealing problem among the sectional bodies does not need to be considered; the impellers are symmetrically arranged back to back, so that the sealing reliability of the bearing box is improved.

Description

High-pressure double-cylinder self-balancing multistage pump

Technical Field

The utility model relates to a pump field is a high pressure binocular self-balancing multistage pump.

Background

Generally, a plurality of impellers are connected in series on a pump shaft of a multi-stage pump, and the impellers can obtain higher lift after pressurizing conveyed liquid media, so that the multi-stage pump is required to be used under the working condition requirement of high lift. The pressure of the inner cavity of the pump body of the multistage pump is relatively high, the high pressure of the inner cavity can push the rotor of the impeller to move towards one direction, a bearing supported on one side can be formed to bear a large axial force load, the bearing fails in advance, the compression amount of the mechanical seal on one side with large axial force is increased, abrasion is increased, the mechanical seal fails in advance, and leakage occurs. Therefore, how to balance the axial force and improve the sealing reliability of the existing multistage pump is always one of the key problems. In actual operation, there are many liquids (such as poisonous and harmful liquids) which are strictly required and are not allowed to leak, and the multistage pump cannot be used for pumping, so that the high-pressure multistage pump has great limitations.

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

Disclosure of Invention

The utility model aims at solving the technical problem and providing a high-pressure double-cylinder self-balancing multistage pump.

The purpose of the utility model is realized as follows: a high pressure dual barrel self balancing multistage pump comprising: the pump comprises an outer cylinder body, a liquid inlet, a liquid outlet, an end cover A, an end cover B and a pump shaft; the two ends of the outer cylinder are provided with an end cover A and an end cover B, and the liquid inlet and the liquid outlet are arranged above the outer cylinder; the method is characterized in that: the impeller A and the impeller B are arranged on the pump shaft, a plurality of impellers A and impellers B which are symmetrically arranged are arranged on the part of the pump shaft positioned in the outer cylinder body, each impeller A and each impeller B are respectively positioned in a subsection body, and the subsection bodies form an inner shell; a high-pressure cavity is formed between the inner shell and the outer cylinder, and the inner shell is matched with the liquid inlet and the liquid outlet.

As a preferred technical scheme: the non-driving end of the outer cylinder body is connected with an end cover A through a flange structure, and the driving end is connected with an end cover B through a flange structure.

As a preferred technical scheme: the impeller A of the front half part and the impeller B of the rear half part are arranged on the pump shaft back to back.

As a preferred technical scheme: the segmented bodies form a pressure cavity.

The utility model has the advantages that: the outer cylinder body is manufactured by adopting an integrally forming forging process, so that the bearing performance is higher; the thermal expansion of the plurality of sectional bodies forming the inner shell can be kept consistent as the sectional bodies are jointly positioned in the same temperature and pressure environment; the hydraulic pressure in the high-pressure cavity is higher than that in the independent sectional bodies, and the sealing problem among the sectional bodies does not need to be considered; the impellers are symmetrically arranged back to back, so that the axial force of the rotor part is basically eliminated, and the sealing reliability of the bearing box is improved.

Drawings

FIG. 1 is a schematic view of the present invention;

description of the drawings: 1. an outer cylinder; 2. a liquid inlet; 3. a liquid outlet; 4. an end cap A; 5. an end cap B; 6. a pump shaft; 7. an impeller A; 8. an impeller B; 9. a segment body; 10. an inner housing; 11. a high pressure chamber; 12. the pressure chamber.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, which are not intended as limiting the invention: a high pressure dual barrel self balancing multistage pump comprising: the device comprises an outer cylinder body 1, a liquid inlet 2, a liquid outlet 3, an end cover A4, an end cover B5 and a pump shaft 6; end covers A4 and B5 are arranged at two ends of the outer cylinder body 1, and the liquid inlet 2 and the liquid outlet 3 are arranged above the outer cylinder body 1; the method is characterized in that: the pump shaft 6 is provided with an impeller A7 and an impeller B8, the part of the pump shaft 6 positioned in the outer cylinder 1 is provided with a plurality of symmetrically arranged impellers A7 and B8, each impeller A7 and each impeller B8 are respectively positioned in a segment 9, and the segment 9 forms an inner shell 10; a high-pressure cavity 11 is formed between the inner shell 10 and the outer cylinder 1, and the inner shell 10 is matched with the liquid inlet 2 and the liquid outlet 3.

The non-driving end of the outer cylinder body 1 is connected with an end cover A4 through a flange structure, and the driving end is connected with an end cover B5 through a flange structure. The front half impeller A7 and the rear half impeller B8 are arranged back-to-back on the pump shaft 6. The segmented bodies 9 form pressure chambers 12 therebetween.

The utility model has the advantages that: this kind of structural style's high pressure binocular self-balancing multistage centrifugal pump, its simple structure, design benefit, rationally distributed, it exists to traditional multistage pump: the special impeller back-to-back structure is designed, and the outer cylinder body is manufactured by adopting an integrally forming forging process, so that the bearing performance is higher. Because the multiple sectional bodies forming the inner shell are jointly positioned in the same temperature and pressure environment, the thermal expansion of the multiple sectional bodies can be kept consistent, so that the adjacent sectional bodies are close to each other under the action of hydraulic pressure, and because the hydraulic pressure in the high-pressure cavity is higher than the hydraulic pressure in the separate sectional bodies, the sealing problem among the sectional bodies does not need to be considered, a large number of sealing structures can be saved, and the purpose of reducing the cost is achieved. Meanwhile, the impellers of the front half part and the rear half part are symmetrically arranged back to back, so that the axial force of the rotor part is basically eliminated, the sealing reliability of the bearing box is improved, and the double-cylinder multistage centrifugal pump has the advantages of simple manufacturing process and low manufacturing cost, is particularly suitable for popularization and application in the working condition of the high-pressure field, and has a very wide market prospect.

The above embodiments of the present invention are only examples for clearly illustrating the present invention, but not for limiting the scope of the present invention, and all equivalent technical solutions also belong to the scope of the present invention, and the scope of the present invention should be defined by the claims.

Claims

1. A high pressure dual barrel self balancing multistage pump comprising: the pump comprises an outer cylinder body (1), a liquid inlet (2), a liquid outlet (3), an end cover A (4), an end cover B (5) and a pump shaft (6); the two ends of the outer cylinder body (1) are provided with an end cover A (4) and an end cover B (5), and the liquid inlet (2) and the liquid outlet (3) are arranged above the outer cylinder body (1); the method is characterized in that: the impeller A (7) and the impeller B (8) are arranged on the pump shaft (6), a plurality of impellers A (7) and impellers B (8) which are symmetrically arranged are arranged on the part, located inside the outer cylinder (1), of the pump shaft (6), each impeller A (7) and each impeller B (8) are respectively located in a sectional body (9), and the sectional bodies (9) form an inner shell (10); the high-pressure liquid mixing device is characterized in that a high-pressure cavity (11) is formed between the inner shell (10) and the outer cylinder body (1), and the inner shell (10) is matched with the liquid inlet (2) and the liquid outlet (3).

2. The high pressure dual barrel self balancing multistage pump of claim 1, wherein: the non-driving end of the outer cylinder body (1) is connected with an end cover A (4) through a flange structure, and the driving end is connected with an end cover B (5) through a flange structure.

3. The high pressure dual barrel self balancing multistage pump of claim 1, wherein: the impellers A (7) and the impellers B (8) are arranged on the pump shaft (6) back to back.

4. The high pressure dual barrel self balancing multistage pump of claim 1, wherein: a pressure cavity (12) is formed between the subsection bodies (9).