Design,commissioning and test of suspension front axle of high-power tractor
In view of the problems of poor driving comfort,easy driving fatigue and low working efficiency of the domestic high-horsepower tractor,a non-independent suspension front axle is designed,the structural parameters are optimized and determined by simulation analysis,boundary test,response test and vibration isolation quality test.According to the boundary of suspension front axle life of 15 000 hours,tractor maximum speed of 40 km/h,maximum braking deceleration of 5 m/s2,suspension capacity of±65 mm,combined with theoretical analysis and empirical design,the stiffness value of the suspension front axle is initially determined to be 310-980 N/mm,and the corresponding undamped natural frequency range is less than 2.0 Hz.The damping coefficient range is 0.2-0.7 s-1.When the mode is switched,the position adjustment time is 6-30 s,and the pressure relief time is less than 30 s.The results of simulation analysis and boundary test show that the suspension front axle meets the life requirement of 15 000 hours,the maximum speed of 40 km/h and the maximum braking deceleration of 5 m/s2.After the response test and optimization,the position adjustment time is 3.57-14.71 s and the pressure relief time is less than 16.69 s when the mode is switched.The vibration isolation quality test shows that the undamped natural frequency is less than1.8 Hz,and the damping coefficient is 0.45-0.56 s-1.
suspension front axletractorindependent side minimum accelerationvibration spectrumFourier transform
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NSTL
万方数据
