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A steady flow centrifugal pump and its design method

A centrifugal pump and steady flow technology, which is applied to parts, pumps, and pump components of pumping devices used for elastic fluids, can solve problems affecting the stability of the flow state in the pump, reducing volumetric efficiency, etc., and achieve good economy efficiency, reduce mutual interference, and improve the effect of flow conditions

Inactive Publication Date: 2017-12-15
ZHEJIANG SCI-TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are various gaps in the centrifugal pump (impeller tip gap, front disc and pump casing gap, rear disc and pump casing gap, mouth ring seal gap and inducer vane top gap, etc.), the flow in these gaps not only reduces the volumetric efficiency , and seriously affect the flow state in the pump and the operation stability of the pump

Method used

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  • A steady flow centrifugal pump and its design method
  • A steady flow centrifugal pump and its design method
  • A steady flow centrifugal pump and its design method

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] Such as figure 1 , 2Shown in and 3, a kind of steady-flow centrifugal pump comprises suction chamber 1, impeller, pump casing 7 and shaft 12; The impeller comprises blade, impeller front cover plate 5 and impeller rear cover plate 8; The cover plates 8 are fixedly connected by n blades, n=4; the impeller rear cover plate 8 is fixed on the shaft 12; the entrance of the impeller front cover plate 5 is provided with a zigzag structure; the inner wall of the pump casing 7 is located at the zigzag structure A sealing ring 2 is provided; the water absorption chamber 1 is arranged at the inlet of the impeller and fixed with the pump casing 7; the fluid flows into the impeller through the water absorption chamber 1. The rear side of the impeller rear cover 8 is provided with an inner annular baffle and an outer annular baffle, and a balance hole 11 is ...

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Abstract

The invention discloses a steady-flow centrifugal pump and a design method thereof. An efficient running range of a centrifugal pump is narrowed and the service life thereof is shortened due to volume loss caused by a gap of an opening ring of the centrifugal pump, and influence of an axial force on the running of the centrifugal pump. According to the invention, a sealing structure is arranged at an inlet of an impeller, and a balance disc structure is arranged between the rear part of the impeller and a pump shell; due to a zigzag structure, a leakage flow is effectively reduced, the interblending interference effect of the leakage flow at the opening ring, and a main flow is reduced, and the performance of the centrifugal pump is improved; due to the balance disc structure, the automatic balance of the axial force of the impeller is realized; and numerical simulation is carried out on an internal flow field of the centrifugal pump, then analysis is carried out by virtue of an energy gradient theory to obtain distribution of an energy gradient K function of the internal flow field, and then the dimensions of the zigzag structure and the dimensions of the balance disc structure in the sealing structure are optimized until the optimal dimensions are obtained. According to the invention, the reliability and safety of the running of the centrifugal pump are improved, the comprehensive performance of the centrifugal pump is improved, and good economic benefits are achieved.

Description

technical field [0001] The invention belongs to the field of impeller machinery and relates to a centrifugal pump, in particular to a steady-flow centrifugal pump and a design method thereof. Background technique [0002] Centrifugal pumps are general-purpose machinery with a large quantity and a wide range, and are widely used in various sectors of the national economy such as machinery, chemical industry, energy, aerospace and civil construction. Improving the efficiency of centrifugal pumps can make full use of limited energy and improve economic benefits. With the development of science and technology, the application field of pumps is expanding rapidly. According to the statistics of different countries, the power consumption of pumps accounts for about 1 / 5 of the total power generation in each country. It can be seen that the energy consumption of pumps is huge. The level of research and design has an important impact on national economic development, energy conservat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/22F04D29/66F04D29/08F04D29/42
CPCF04D29/086F04D29/22F04D29/426F04D29/662
Inventor 窦华书郑路路陈小平魏义坤杨徽
Owner ZHEJIANG SCI-TECH UNIV
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