锥面螺栓联接结构承载能力的实验预测

本文用模型试验方法研究了以套齿 (花键)联接的某发动机高压轴的轴向承载能力,分析了双锥面定位联接结构的载荷—变形规律以及它们与传统的螺栓联接结构载荷—变形规律的区别,讨论了影响双锥面联接结构轴向承载能力的因素,同时对某发动机高压轴的承载能力进行了试验确定,并对其装配工艺提出了改进建议。 

PREDICATION OF FASTENNING CAPACITY OF SCREWED JOINT STRUCTURE WITH CONE ASSEMBLY

Assembly and cone assemble are employed between jointed pants for meeting the requirement of self centring.The fastenning capacity of rotator screwed joint with cone assembly can not be calculated according to traditional method,because it is not only related to elastical deformation of jointed parts but also to friction condition and slide condition between contact cone surface under simulation conditions of the geometry and assembly technique.A model test has been conducted to research the mechanical behaviour of the jointed parts in assembling and loading process.The load deformation relation of jointed parts reveals the difference between the plane assembly and the cone assembly.The relation of the former is linear and that of the latter nonlinear.In this research the loose condition of joint structure was defined experimentally as that the strain of cone parts equals to zero and the correlated load is named for loose load(or bearing capacity).Based on the test results the cone assembly jointed structure increases loose load owing to the friction factor.We have been predicted loose load of real jointed structure in an aeroengine by means of the model test and investigated the factors which have influence on bearing capacity.