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International Standard Serial Number:
ISSN 1001-4551
Sponsor:
Zhejiang University;
Zhejiang Machinery and Electrical Group
Edited by:
Editorial of Journal of Mechanical & Electrical Engineering
Chief Editor:
ZHAO Qun
Vice Chief Editor:
TANG ren-zhong,
LUO Xiang-yang
Tel:
86-571-87041360,87239525
Fax:
86-571-87239571
Add:
No.9 Gaoguannong,Daxue Road,Hangzhou,China
P.C:
310009
E-mail:
meem_contribute@163.com
Abstract: Improving the static friction coefficient of the connecting surface between the main shaft and the gearbox flange can indirectly realize the compact design of the connecting surface between the main shaft and the gearbox flange, and realize the lightweight of the wind turbine. Aiming at the problems of compact and lightweight design of wind turbine transmission system, the friction coefficient of the friction gasket used in connection flange on the wind turbine was experimentally studied.Firstly, the influence of friction coefficient of the surface of connection flange between spindle and gearbox on the ability to pass a twist and lose weight to reduce costs was analyzed. Then, the nodular cast iron QT400-18Al and QT700-2 for wind turbine spindle and gearbox flange were selected as samples to study the static friction coefficient between the two kinds of specimens.Finally,a method was proposed to measure the static friction coefficient based on the quasi-static torsional and compressive loads of a tension-torsion combined testing machine,and the static friction coefficients of friction gaskets at the average contact pressures of 50 MPa, 100 MPa, 125 MPa and 150 MPa were studied respectively.The research results show that the mean value and standard deviation of static friction coefficients measured in the experiment are 0.667 and 0.023 respectively, when the average contact pressure of the bonding surface is greater than 50 MPa.The static friction coefficient can be increased by about one time with the use of friction gasket.When the friction gasket is reused, the static friction coefficient decreases.In the actual wind power engineering, relevant measures should be taken to ensure that the static friction coefficient of the joint surface will not be too low when the friction gasket is reused, so as not to affect the reliability of the joint.
Key words: wind turbine transmission system; main shaft; gearbox; surface of connection flange; friction gasket; lightweight design; static friction coefficient
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