The Finite Element Analysis Of The Universal Coupling

This paper choose cross-axle shaft coupling as the object to be studied.Basedon the large-scale software ANSYS,this paper studied the kinetic capability andstatics capability of this shaft coupling.The shaft coupling which is manufactured by CENTA , an Germaniccompany ,is widely used in the field of electric power generation by using windpower,engineering ,ship craft and mining-machinery.I went to Tong Yu of Jilinprovince to do some investigation and find that the CENTA-FH shaft coupling ofenbe finded coming forth quiver,distress and abrade.The anemo-electric generator is composed mainly of fan blades ,speedincreasing gear, shaft coupling and electric generating set.The wind impulse thefan blade and the blades pass the rotaional speed and twist mement to the speedincreasing gear, the speed increasing gear enhances the rotaional speed anddebases the twist mement and then pass the the rotaional speed and twist mementto the rotor of the electric generator through the CENTA-FH shaft coupling.Therotor rotate and the electric generator works.When the electric generator works, the speed of the wind is astaticism.And this result in the working rotaional speed of the shaft coupling can not keepchangeless,this reflects on two problems :the torsional destroyment and thesympathtic of the shaft coupling.When the rotatinoal speed is low, the twistmement that the shaft coupling passes is large,this will easily result in the staticstrength destroyment of the shaft coupling;When the rotatinoal speed is high, thetwist mement that the shaft coupling passes is small, this will easily result in thesympathetic of the shaft coupling.How to calculate the anterior critical rotationalspeeds through analysis based on theory and choose the several best workingrotatinoal speeds, is the emphases of this paper.The finite-element method is the basic thought of this paper,and the largescale software ANSYS is the tool.The thought of the FEM is that to separate theconsecutive solution procedure zone into compoung body which is composed of aset of elements that are finite and coupled together.The FEM think that thesolution procedure zone is composed of many jerkwater elements.Because that theelements can be seperated into all kinds of shape and dimention,it can admirablybe fit to the complicated shapes and terminal conditions.This paper studied the CENTA-FH shaft coupling by using the softwareANSYS.At first the model is built in ANSYS.To easily divide the elementgraticule, the model should be predigested.When built the model, the transactionto the bottom of the shaft coupling and the cross axle should be pay more attentionto. In this paper,I built the model of the cross axle and the model of the shaftseperately, and then divided them into elements,at last I applied the joint at theinterlink.By using thie method, the blunder can be minished and the precisioncan be improved.And then I studied the static strength of the shaft coupling and gotthe stress and the strain of it.Based on this,I checked the shaft coupling and theresult showed that the shaft coupling is eligible.When do kinetic analysis, I deduced the modal function and the displacementresponse of the shaft coupling by calculating the input and output angle and thedrive ratio.Then I studied the shaft coupling and got hold of the anterior ten modeand free frequency.According to this,I calculated the anterior ten criticalspeeds.By comparing it to the working rotational speeds of the shaft coupling,found that they were very adjacent.This is the cause of the sympathetic.Accordingthese,this paper advanced several notion of amelioral.