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Centrifugal pump for deep well

A centrifugal pump and deep well technology, applied in the field of fluid machinery, can solve the problems of increasing the length of the well pump and production cost, reducing the axial size of the well pump, increasing the single-stage lift, etc., so as to improve the efficiency of the pump, reduce the production cost, improve the The effect of single-stage lift

Inactive Publication Date: 2006-06-14
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the single-stage head is low, a well pump needs more impellers and guide casings, which will increase the length and production cost of the well pump
Patent Application No. 200420010385.1 "submersible electric pump for well" and patent application No. CN94216916.6 "a portable well submersible pump" are exactly the deep well centrifugal pumps designed by the above two methods, although all mentioned in the patent specification to improve the single The advantages of single-stage head and reduced axial size, but without increasing the diameter of the impeller, it is impossible to maximize the single-stage head, and it is also impossible to minimize the axial size of the entire well pump

Method used

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  • Centrifugal pump for deep well
  • Centrifugal pump for deep well

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Embodiment Construction

[0015] figure 1 The model of the deep well centrifugal pump in the shown embodiment is 250QJ125. According to the national standard GB / T2816-2002 "Submersible Pump for Wells", the outer diameter of the diversion shell (10) must be designed to be about φ220, and the diversion is designed through strength calculation The shell wall thickness is 6mm, the outer diameter of the guide shell (10) minus twice the thickness of the guide shell, the maximum inner diameter (9) of the guide shell is about φ208, and the inlet area required by the guide vane can be determined according to the rated flow. It is calculated that the outer diameter of the lower cover plate (6) of the guide vane of the deflector shell is about φ170. The impeller adopts a closed impeller with front and rear cover plates. The outer diameter of the front cover plate (2) of the impeller is approximately equal to the maximum diameter of the deflector shell. The inner diameter (9) is designed to be about φ207. The outer ...

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Abstract

In the invention, the external diameter of the vane front cover plate is approximately equal to the maximum internal diameter of the flow-guiding casing and the fit of the external and internal is clearance one. The external diameter of the vane rear cover plate is greater than the external diameter of the guide vane bottom cover plate and the vane external diameter is a circular conical surface, so as to reduce the number of the pump chambers between the vane external diameter and the maximum internal diameter of the flow-guiding casing and raise the single-stage lift of well pump.

Description

Technical field [0001] The invention is a fluid machine, especially a deep well submersible centrifugal pump or a long-axis deep well centrifugal pump mainly used in deep water machine wells. Background technique [0002] The deep well centrifugal pump is also a vertical multi-stage centrifugal pump. It consists of at least two pairs of impellers and guide shells connected in series together with a water inlet section and a water outlet section. The specific speed of the impeller type water pump is below 210. At present, deep well centrifugal pumps at home and abroad can be classified into two types based on different diversion casings. One is a deep well centrifugal pump using spatial guide vanes, which is essentially a deep well centrifugal pump designed according to the design method of an oblique flow pump. The other is a deep well centrifugal pump that uses forward and reverse guide vanes or only uses anti-guide vanes. It is essentially a deep well centrifugal pump des...

Claims

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Application Information

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IPC IPC(8): F04D1/10F04D29/44
Inventor 陆伟刚施卫东张启华张金凤
Owner JIANGSU UNIV
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