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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 and production cost of the well pump, reducing the axial size of the well pump, and improving the single-stage lift, so as to improve the efficiency of the pump, reduce the production cost, and improve The effect of single-stage head

Inactive Publication Date: 2008-11-12
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

[0014] figure 1 The model of the deep well centrifugal pump shown in the embodiment is 250QJ125. According to the national standard GB / T2816-2002 "Submersible Pump for Wells", the outer diameter of the diversion shell must be designed to be about φ220, and the wall of the diversion shell must be designed through strength calculation. The thickness is 6mm, the outer diameter of the guide shell is 10 minus twice the wall thickness of the guide shell, and the maximum inner diameter 9 of the guide shell is about φ208. According to the rated flow rate, the inlet area of ​​the guide vane can be calculated. The outer diameter of the lower cover plate 6 of the guide vane is about φ170, and the impeller adopts a closed impeller with front and rear cover plates. The cooperation between the outer diameter of the cover plate 2 and the maximum inner diameter 9 of the guide casing is a clearance fit, and the gap is about 0.5 mm. The outer diameter of the impeller rear cover plate 4 is small...

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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 relates to a fluid machine, in particular to a deep well submersible centrifugal pump or a long axis deep well centrifugal pump mainly used in deep water wells. Background technique [0002] The deep well centrifugal pump is also a vertical multistage centrifugal pump, which is composed of at least two pairs of impellers and guide casings connected in series together with a water inlet section and a water outlet section. The specific speed of the pump representing the impeller type is below 210. At present, deep well centrifugal pumps at home and abroad can be classified into two types according to different diversion shells. One is a deep well centrifugal pump using space guide vanes, which is essentially a deep well centrifugal pump designed according to the design method of a diagonal flow pump. The other is a deep well centrifugal pump using forward and reverse guide vanes or only reverse guide vanes, which is essentially a deep well...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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