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Suction structure of double-shell radial subdivision multistage centrifugal pump and design method of suction structure

A design method, double-shell technology, applied in radial flow pumps, components of pumping devices for elastic fluids, computer-aided design, etc. problems such as uniformity, to achieve the effect of improving product competitiveness, improving flow uniformity, and avoiding impact

Inactive Publication Date: 2021-04-30
EBARA GREAT PUMPS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a suction structure and design method of a double-casing radially split multi-stage centrifugal pump to solve the above-mentioned background technology that cannot ensure that the impeller inlet has an axisymmetric velocity field and uneven flow. question

Method used

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  • Suction structure of double-shell radial subdivision multistage centrifugal pump and design method of suction structure
  • Suction structure of double-shell radial subdivision multistage centrifugal pump and design method of suction structure
  • Suction structure of double-shell radial subdivision multistage centrifugal pump and design method of suction structure

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Embodiment 1

[0041] The present invention provides a kind of suction structure of radially split multi-stage centrifugal pump of double casing here through improvement, such as Figure 1-Figure 5 As shown, the suction structure of the double-casing radially split multistage centrifugal pump includes the outer cylinder body 2, the suction side stuffing box body 1, the impeller 6 and the first stage middle section 3 fixed on the outer cylinder body 2. The outer cylinder 2 is provided with a pump inlet 10, and the inside of the outer cylinder 2 is provided with a pump shaft 7 coaxially arranged therewith, and the impeller 6 is fixed on the pump shaft 7 through a key connection with a snap ring 8, An annular suction chamber 9 is formed between the suction side stuffing box body 1 and the first stage middle section 3 . The annular suction chamber 9 formed by the stuffing box body 1 on the suction side and the middle section 3 of the first stage prevents the fluid from rushing directly to the pu...

Embodiment 2

[0060] Based on the design method of the suction structure of the double casing radially split multistage centrifugal pump provided in the first embodiment of the present application, the second embodiment of the present application proposes another double casing radially split multistage centrifugal pump The design method of the suction structure. The second embodiment is only a preferred mode of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0061] The second embodiment of the present invention will be further described below in conjunction with the drawings and implementation methods.

[0062] Such as Figure 6-Figure 7 As shown, in order to further solve the problem of the impact of the fluid on the pump shaft 7, on the basis of Embodiment 1, the side wall of the suction side stuffing box body 1 is provided with a ring-shaped baffle ring 13, which is connected with the suction...

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Abstract

The invention relates to a suction structure of a double-shell radial subdivision multi-stage centrifugal pump and a design method of the suction structure, and belongs to the technical field of multi-stage centrifugal pumps. The suction structure comprises an outer barrel, a suction side stuffing box, an impeller and a first-stage middle section, wherein a pump inlet is formed in the outer barrel, a pump shaft coaxial with the outer barrel is arranged in the outer barrel, the impeller is fixed to the pump shaft through a clamping ring for key connection, and an annular suction chamber is formed between the suction side stuffing box and the first-stage middle section. According to the design method of the suction structure of the double-shell radial subdivision multi-stage centrifugal pump, the double-shell radial section multi-stage centrifugal pump can be independently and optimally designed according to different impeller working conditions, liquid is prevented from entering an annular space in a suddenly-enlarged mode and then entering the impeller in a suddenly-contracted mode, the hydraulic loss in the process is reduced, water waste is avoided, the environmental protection performance of the device is improved, noise generated by impact of fluid on the pump shaft is reduced, and the device is more environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of multistage centrifugal pumps, in particular to a suction structure and a design method of a double-casing radially split multistage centrifugal pump. Background technique [0002] The existing double-housing radially split high-pressure decoking water pump returned to the factory for maintenance has a large number of erosion pits in the annular suction chamber, which has a great impact on the strength of the shaft. When repairing this pump, a new shaft needs to be replaced, causing Economic losses affect customers' evaluation of the company's products. [0003] The cited application number is CN201420477895.3, which discloses the middle discharge section of a multi-outlet horizontal single-suction segmental multi-stage centrifugal pump, including a discharge flange, a discharge section, a bracket bottom plate, a sealing ring, a racemic flow guide vane, and a bracket The plate and the outrigger of the out...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/42F04D29/08F04D29/66F04D29/22F04D1/06G06F30/28G06F119/14G06F113/08
CPCF04D1/06F04D29/086F04D29/2222F04D29/4273F04D29/669G06F30/28G06F2113/08G06F2119/14
Inventor 张祥杨春野李林锋杨国军曹军伟吴万旺陈小光陈晓秦林大锡聂小林
Owner EBARA GREAT PUMPS