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Pump shaft connecting structure of centrifugal pump and design method thereof

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

Active Publication Date: 2019-10-25
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 connecting structure of centrifugal pump and design method thereof
  • Pump shaft connecting structure of centrifugal pump and design method thereof
  • Pump shaft connecting structure of centrifugal pump and design method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] A pump shaft connection structure of a centrifugal pump, such as figure 1 As shown, the connecting structure includes an impeller portion (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 , used to connect and fix the impeller part and the shaft part;

[0102] The side of the impeller part facing the elastic ring is provided with a plurality of first unilateral convex teeth distributed at uniform intervals, and the side of the shaft part facing the elastic ring is provided with a plurality of second unilateral protrusions distributed evenly at intervals tooth;

[0103] The elastic ring is a double-si...

Embodiment 2

[0196] Taking centrifugal pump flow rate Q=300m3 / h, lift 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.

[0197] 1. The material and shape design of the impeller part;

[0198] (1) The impeller part is made of the same casting material as the impeller of the centrifugal pump, that is, cast iron;

[0199] (2) The shape design method of the impeller part is as follows:

[0200] a) According to the table below, determine the number of convex teeth m of the impeller part 1 =7;

[0201]

[0202] The angle distribution of each convex tooth in the impeller part

[0203] b) The radius of the base circle of the impeller part

[0204] In the formula, α 1 ∈ [1.06, 1.23], ...

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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] As the traditional connection method between the impeller and the pump shaft of a centrifugal pump, the shaft key connection can ensure the stable operation of the centrifugal pump, but it is also limited by its stable connection. When the impeller is stuck, the pump shaft is difficult to stop, resulting in 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, which 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. SUMMARY OF THE INVENTION [0003] The invention solves the technical problem that the impeller and the pump shaft are broken or the motor...

Claims

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Application Information

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Patent Type & Authority Applications(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