Open impeller structure for high-speed pump

A technology for open impellers and high-speed pumps, applied to pumps, pump components, non-variable pumps, etc., can solve the problems of unsuitable balance holes for blades, large turbulence, and increased losses, and achieve balanced axial force , weaken the hump curve, weaken the effect of pressure

Pending Publication Date: 2019-12-03
ZHEJIANG SCI-TECH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the problem of axial force, structural design such as balance hole and balance plate is usually adopted at present; although it is effective, it increases the loss due to the large turbulence effect
However, the blades of high-speed pumps are thin, and it is not suitable to set balance holes on the blades.

Method used

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  • Open impeller structure for high-speed pump
  • Open impeller structure for high-speed pump
  • Open impeller structure for high-speed pump

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Embodiment Construction

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

[0036] 1. Specific embodiments of the open impeller for high-speed pumps according to the present invention are as follows: figure 1 with figure 2 As shown, the blades of the high-speed impeller are no longer completely straight blades, but are twisted at the inlet section, and a certain inlet angle is set

[0037] can be derived from the following formula:

[0038]

[0039] In the formula: Q--flow rate (determined by design requirements)

[0040] f 1 --Axial flow channel cross-sectional area (determined by design requirements)

[0041] n v --The volumetric efficiency of the pump (determined by the design requirements)

[0042] D. 1 --Impeller inlet diameter

[0043] δ 1 --thickness of blade

[0044] lambda 1 --The included angle between the axial surface section line and the axial surface streamline, here is taken...

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Abstract

The invention relates to the engineering machinery, and aims to provide an improvement of an open impeller structure. An impeller should have the characteristics of weakening or eliminating a hump curve, balancing the axial force, reducing an extrusion phenomenon, reducing an inlet flow rate and reducing the hydraulic loss of a pump. According to the technical scheme, the open impeller structure for the high-speed pump comprises a hub, a plurality of blade bearing plates which are connected with the hub into a whole and are arranged in a radial mode with the axis of the hub as the center and aplurality of blades which are arranged on the blade bearing plates in a one-to-one correspondence manner, and is characterized in that each blade bearing plate is composed of an inclined section which is close to the hub and is inclined to the axis of the hub and a straight line section perpendicular to the axis of the hub; one part of each blade penetrates through and is embedded in a preset through groove at the inclined section of the blade bearing plate, part of each blade is exposed out of the back face of the impeller to form an auxiliary blade, and the other part of each blade serves as a front blade to be fixed to the front face of the straight-line section of the blade bearing plate and is perpendicular to the plane of the straight-line section.

Description

technical field [0001] The invention relates to a construction machine, in particular to an open impeller structure for a high-speed pump. Background technique [0002] As a representative of hydraulic machinery, centrifugal pumps play an important role in industrial production, but there are always some unavoidable problems in the design, manufacture, production and operation of centrifugal pumps. [0003] (1) The hump curve generated during the operation of the centrifugal pump is due to the fact that when the flow rate is greater than or less than the design flow rate, the direction of the liquid flow is inconsistent with the direction of the blades, which causes the actual performance curve of the pump to deviate from the theoretical curve. When the flow rate is small, the impact loss and eddy loss are relatively large, and the friction loss along the process is relatively small, which is more unfavorable to the stability of the performance curve, and it is easy to produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/24F04D29/041
CPCF04D29/0416F04D29/242
Inventor 李晓俊刘遥遥陈晖杨宝锋朱祖超
Owner ZHEJIANG SCI-TECH UNIV
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