Method for improving angle adjustment accuracy and reliable durability of mechanical full-adjustment mechanism of water pump

Abstract

The invention discloses a method for improving the angle adjustment accuracy and reliable durability of a mechanical full-adjustment mechanism of a water pump, and belongs to the technical field of precision and reliable durability of power mechanical equipment. The method aims at reducing the force-bearing deformation of an adjustment rod and adjustment errors of blades on the premise of not changing the hydraulic performance of an impeller, reducing the force borne by a separation bearing of the adjustment mechanism and improving the reliable durability; the method specifically comprises themeasures of optimizing the position of a blade shaft of the water pump under a full-running working condition based on CFD-computational fluid dynamics, increasing the length of a crank of the adjustment mechanism under the condition of the allowable space in an impeller hub, selecting a separation thrust roller bearing with a small inclination angle and the like; by comparing the adjustment force, the force borne by the separation bearing and the service life before and after the improvement of the adjustment mechanism, the method has the advantages that the adjustment force of the blades ofthe water pump under the full-running working condition can be reduced by about 60% on average, the force borne by the separation bearing is reduced by 68% on average, and the calculation service life is prolonged by about 30 times.

Description

technical field [0001] The invention belongs to the technical field of precision and reliability and durability of power mechanical equipment, and relates to a method for improving the angle adjustment accuracy and reliability and durability of a mechanical full-adjustment mechanism of a water pump, and specifically relates to a method for different lifts and different blade angles of water pumps. Under full operating conditions, by optimizing the position of the blade shaft, increasing the length of the crank arm of the adjustment mechanism, and applying small inclination angle thrust bearings to the adjustment mechanism, the adjustment force of the blade and the force on the bearing of the adjustment mechanism can be reduced, and the performance of the mechanical full adjustment mechanism of the water pump can be improved. Angle adjustment accuracy and reliability and durability. Background technique [0002] Large and medium-sized axial flow pumps and guide vane mixed flo...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the above-mentioned problems of large and medium-sized mechanical fully adjustable axial flow pumps and guide vane type mixed flow pump blades with large hydraulic torque, large adjustment force, large angle adjustment error and poor reliability and durability of the separation bearing, and proposes a mechanical full adjustment mechanism for water pumps. The method of angle adjustment accuracy and reliability and durability, by optimizing the position of the impeller blade shaft, improving the adjustment mechanism and reasonably selecting the release bearing, reduces the adjustment force and the force on the release bearing, and improves the adjustment accuracy of the mechanical full adjustment mechanism and the release bearing. reliable durability

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