A Type Selection Method of Anti-wear Plate on the Bottom Surface of Hydraulic Turbine Control Ring

Abstract

The invention discloses a model selection method for wear-resistant bottom surface plates of a water turbine control ring. The method includes the steps that hydrostatic pressure stress PV=0 of the wear-resistant bottom surface plates of the control ring is computed, PV=0=G / (N*A)=G / (N*B*L), wherein G is the weight of a guide vane control ring body, N is the number of the wear-resistant bottom surface plates of the guide vane ring, B is the width of each single wear-resistant bottom surface plate, and L is the length of each single wear-resistant bottom surface plate; the sliding speed V of the wear-resistant bottom surface plates of the control ring is computed, V=Dv / Dy*S / Ts, wherein Dy is the distance between two large control ring lug holes, Dv is the outer diameter of each wear-resistant bottom surface plate, S is the stroke of a large control ring lug ring, and Ts is closing time of the guide vane; sliding stress PV= / 0V of the wear-resistant bottom surface plates of the control ring is computed, and PV= / 0V=PV=0*V; the hydrostatic pressure stress PV=0 of the wear-resistant bottom surface plates of the control ring is compared to allowable hydrostatic pressure stress of a selected wear-resistant plate material; the sliding stress value Pv= / 0V of the wear-resistant bottom surface plates of the control ring is compared to an allowable sliding stress value of the selected wear-resistant plate material. The model selection method is perfect and scientific, and safety and economy performance of the wear-resistant bottom surface plates of the control ring are effectively guaranteed.

Description

technical field [0001] The invention relates to a type selection method for materials, in particular to a type selection method for an anti-friction plate on the bottom surface of a water turbine control ring. Background technique [0002] combine figure 1 —— image 3 As shown, the left and right sides of the turbine control ring 1 are symmetrically provided with large ear holes 2 of the control ring, and the two guide vane servomotors 3 are arranged on the same side of the line connecting the two large ear holes 2 of the control ring, that is, the two guide vane servomotors 3 Arranged symmetrically in adjacent quadrants, on the bottom surface of the control ring 1 there are several bottom wear plates 4 uniformly distributed around the circumference, and on the outer wall of the control ring 1 there are several vertical wear plates 5 uniformly distributed around the circumference . The guide vane servomotor 3 is fed with pressure oil to operate the piston to move, so that...

AI Technical Summary

Problems solved by technology

[0004] The present invention improves on the above-mentioned technical problems, intends to provide a scientific and complete selection method for the anti-wear plate on the bottom surface of the control ring of the water turbine, and eliminates the problem that the safety and economy of the anti-wear plate on the bottom surface cannot be guaranteed by relying on experience selection

Images