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Blade-wrap-angle-adjustable impeller for centrifugal pump and centrifugal pump

A technology of vane wrap angle and centrifugal pump, which is applied to parts, pumps, pump components, etc. of the pumping device used for elastic fluid, to achieve the effect of increasing the scope of application and optimizing the installation method

Pending Publication Date: 2020-11-17
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the blade wrap angles of existing centrifugal pumps are all fixed, and can only achieve the best performance in a certain working condition.

Method used

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  • Blade-wrap-angle-adjustable impeller for centrifugal pump and centrifugal pump
  • Blade-wrap-angle-adjustable impeller for centrifugal pump and centrifugal pump
  • Blade-wrap-angle-adjustable impeller for centrifugal pump and centrifugal pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment one: if Figure 1-8Shown is an impeller for a centrifugal pump with adjustable blade wrapping angle, which includes a central shaft 1 and several blades 2, the several blades 2 are evenly distributed around the circumference of the central shaft 1, and the radial inner diameter of each blade 2 is The ends are hinged with the central shaft 1, and the radially outer end of each blade 2 is equipped with a diameter-adjusting blade 3. The central shaft 1 is provided with an inner cavity 4, and the inner cavity 4 is axially A left angle adjustment slider 5, a right angle adjustment slider 6 and a diameter adjustment slider 7 are slidably arranged, and the left angle adjustment slider 5 is connected with a left power that drives it to slide axially in the inner cavity 4 source 8, the right angle-adjusting slider 6 is connected with a right power source 9 that drives it to slide axially in the inner cavity 4, and the diameter-adjusting slider 7 is connected with a dr...

Embodiment 2

[0052] Embodiment 2: This embodiment protects a centrifugal pump, which includes a pump casing and an impeller installed in the pump casing, wherein the impeller disclosed in Embodiment 1 is used for the impeller.

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Abstract

The invention discloses a blade-wrap-angle-adjustable impeller for a centrifugal pump. The impeller comprises a central shaft and a plurality of blades, wherein the radial inner end of each blade is matched with the central shaft in a hinging manner; a diameter-adjusting blade is mounted at the radial outer end of each blade; an inner cavity is formed in the central shaft; a left angle-adjusting sliding block, a right angle-adjusting sliding block and a diameter-adjusting sliding block are slidably arranged in the inner cavity in the axial direction; the corresponding diameter-adjusting bladeon each blade is connected onto the diameter-adjusting sliding block through a corresponding diameter-adjusting rope; a left angle-adjusting rope and a right angle-adjusting rope are correspondingly arranged on the left and right sides of the radial inner end of each blade; the other end of each left angle-adjusting rope is connected onto the left angle-adjusting sliding block; one end of each right angle-adjusting rope is connected with the right side of the corresponding blade; and the other end of each right angle-adjusting rope is connected onto the right angle adjusting sliding block. Through the above settings, the real-time adjustment of a blade wrap angle can be achieved under the condition that the external size of the impeller is unchanged, and then the using condition range of the centrifugal pump can be extended. The invention further discloses the centrifugal pump.

Description

technical field [0001] The invention relates to the field of pump body impeller structure, in particular to an impeller for a centrifugal pump with adjustable blade wrap angle. [0002] The invention relates to the field of pump body impeller structure, in particular to a centrifugal pump with adjustable blade wrap angle. Background technique [0003] Centrifugal pump is an important fluid conveying machinery, which is widely used in many fields such as energy extraction, agricultural irrigation, petrochemical industry, water conservancy engineering, and urban water use. The impeller is an important part of the centrifugal pump, its blade shape and hydraulic parameters are the main parameters affecting the performance of the centrifugal pump, and the blade wrap angle is one of the important parameters. The size of the blade wrap angle directly affects the hydraulic loss and flow conditions of the pump. , Cavitation characteristics and so on. Many studies have found that ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/22F04D29/24
CPCF04D29/2222F04D29/242
Inventor 何铁林王艳萍韩传峰李维钦陶瑞林
Owner ZHEJIANG SCI-TECH UNIV
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