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Pump shaft connection structure and design method of a centrifugal pump

A technology of connection structure and design method, applied to parts, pumps, pump elements, etc. of pumping devices used for elastic fluids, can solve problems such as damaged motors, impellers and pump shafts broken

Active Publication Date: 2020-11-20
JIANGSU UNIV ZHENJIANG RES INST OF FLUID ENG EQUIP TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention aims to solve the technical problem that the impeller and the pump shaft are broken or the motor is damaged when the impeller of the centrifugal pump is stuck.

Method used

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  • Pump shaft connection structure and design method of a centrifugal pump
  • Pump shaft connection structure and design method of a centrifugal pump
  • Pump shaft connection structure and design method of a centrifugal pump

Examples

Experimental program
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Effect test

Embodiment 1

[0103] A pump shaft connection structure of a centrifugal pump, such as figure 1 As shown, the connection structure includes the impeller part (corresponding to figure 1 structure of the outermost ring), shaft (corresponding to figure 1 The most central structure) and the elastic ring (corresponding to figure 1 The structure of the middle layer), the impeller part is located on the impeller of the centrifugal pump, the shaft part is located on the pump shaft of the centrifugal pump, and the elastic ring is arranged between the shaft part and the impeller part , for connecting and fixing the impeller part and the shaft part;

[0104] The side of the impeller facing the elastic ring is provided with a number of evenly spaced first single-sided protruding teeth, and the side of the shaft facing the elastic ring is provided with a number of evenly spaced second single-sided protruding teeth. tooth;

[0105] The elastic ring is a double-sided concave tooth structure, and the do...

Embodiment 2

[0199] The centrifugal pump flow rate is Q=300m3 / h, head H=80m; centrifugal pump impeller inner diameter D=200mm, distance between impeller and pump shaft L=60mm, pump shaft diameter D2=80mm, motor power P=600kW, speed n=740r / min ; Pump shaft structure length b = 140mm as an example, combined with Figure 1-Figure 5 The specific solutions of the embodiments of the present invention will be further described.

[0200] 1. The material and shape design of the impeller;

[0201] (1) The impeller part is made of the same casting material as the impeller of the centrifugal pump, that is, cast iron;

[0202] (2) The shape design method of the impeller part is as follows:

[0203] a) According to the table below, determine the number of convex teeth of the impeller m 1 = 7;

[0204]

[0205] The distribution angle of each convex tooth on the impeller part

[0206] b) Radius of the base circle of the impeller

[0207] In the formula, α 1 ∈[1.06, 1.23], take α 1 = 1.2; β ...

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Abstract

The invention provides a pump shaft connecting structure of a centrifugal pump. The connecting structure comprises an impeller part, a shaft part and an elastic ring; the impeller part is located on an impeller of the centrifugal pump, the shaft part is located on a pump shaft of the centrifugal pump, the elastic ring is arranged between the shaft part and the impeller part, and is used for connecting and fixing the impeller part and the shaft part, the side, facing the elastic ring, of the impeller part is provided with multiple first single-side convex teeth, the side, facing the elastic ring, of the shaft part is provided with multiple second single-side convex teeth, the elastic ring is of a dual-side concave tooth structure, and dual-side concave teeth are in fit connection with the first single-side convex teeth and the second single-side convex teeth. Through the connecting structure, the problem that due to blockage in the pump, the impeller is broken off and a motor is burnt can be effectively solved, the energy property of the pump is not affected, and the great guarantee is provided for continuous and stable work of the pump.

Description

technical field [0001] The invention relates to the technical field of centrifugal pumps, in particular to a pump shaft connection structure of a centrifugal pump and a design method thereof. Background technique [0002] Shaft key connection is the traditional way of connecting the centrifugal pump impeller and pump shaft. Although it can ensure the stable operation of the centrifugal pump, it is also limited by its stable connection. When the impeller is stuck, the pump shaft is difficult to stop, causing the impeller Or the shaft is forcibly twisted off or the motor is burned. Therefore, it is necessary to invent a new pump shaft connection structure and design method, so that it can not only ensure the hydraulic performance of the pump, but also ensure the safety of the impeller and the motor when the impeller is stuck. Contents of the invention [0003] The invention aims to solve the technical problem that the impeller and the pump shaft are broken or the motor is d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/044F04D29/22
CPCF04D29/044F04D29/2222
Inventor 谈明高田骁吴贤芳刘厚林王凯王勇董亮
Owner JIANGSU UNIV ZHENJIANG RES INST OF FLUID ENG EQUIP TECH