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1 确定运动质量的加速度和减速度比例方向阀的主要任务是控制液压系统运动质量的加速、恒速和减速运动过程以及运动方向,在选用时,应确定希望达到的加速度和减速度值。但是,加、减速度是由许多因素决定的,不能任意选取,确定时要考虑以下问题: 1.1 加速和减速时间t_B 对于等加速运动,加速时间t_B的计算公式为: t_B=v/a(s) 式中 v——运动质量的速度,m/s a——运动质量的加速度,m/s~2 例如:v=1m/s 当 a=10m/s~2时,t_B=0.1s a=20m/s~2时,t_B=0.05s a=0.1m/s~2时,t_B=10s 由上述计算可知,a选得太大没有意义,运动质量加速度a从10m/s~2提高到20m/s~2,只
1 to determine the quality of the acceleration and deceleration of the proportional valve The main task of directional control valve hydraulic system is to control the quality of the acceleration, constant and slow motion and the direction of motion, the choice should be determined to achieve the desired acceleration and deceleration values. However, the acceleration and deceleration are determined by many factors and can not be arbitrarily selected. The following problems should be considered when determining: 1.1 Acceleration and deceleration time t_B For equal acceleration motion, the acceleration time t_B is calculated as follows: t_B = v / a (s ) Where v - the speed of the movement of the mass, m / sa - acceleration of the movement mass, m / s ~ 2 For example: v = 1m / s t_B = 0.1sa = 20m / s ~ 2, when t_B = 0.05sa = 0.1m / s ~ 2, t_B = 10s It can be seen from the above calculation that it is meaningless to choose too large a, the acceleration a of the moving mass is increased from 10m / s ~ 2 to 20m / 2, only