6ES7643-7CK21-493714模块备件参数说明

径向柱塞式液压马达工作原理，当压力油经固定的配油轴4的窗口进入缸体内柱塞的底部时，柱塞向外伸出，紧紧顶住定子的内壁，由于定子与缸体存在一偏心距。在柱塞与定子接触处，定子对柱塞的反作用力为 。力可分解为和 两个分力。当作用在柱塞底部的油液压力为p，柱塞直径为d，力和之间的夹角为X时，力对缸体产生一转矩，使缸体旋转。缸体再通过端面连接的传动轴向外输出转矩和转速。以上分析的一个柱塞产生转矩的情况，由于在压油区作用有好几个柱塞，在这些柱塞上所产生的转矩都使缸体旋转，并输出转矩。径向柱塞液压马达多用于低速大转矩的情况下。轴向柱塞泵除阀式配流外，其它形式原则上都可以作为液压马达用，即轴向柱塞泵和轴向柱塞马达是可逆的。轴向柱塞马达的工作原理为，配油盘和斜盘固定不动，马达轴与缸体相连接一起旋转。当压力油经配油盘的窗口进入缸体的柱塞孔时，柱塞在压力油作用下外伸，紧贴斜盘，斜盘对柱塞产生一个法向反力p，此力可分解为轴向分力及和垂直分力Q。Q与柱塞上液压力相平衡，而Q则使柱塞对缸体中心产生一个转矩，带动马达轴逆时针方向旋转。轴向柱塞马达产生的瞬时总转矩是脉动的。若改变马达压力油输入方向，则马达轴按顺时针方向旋转。斜盘倾角a的改变、即排量的变化，不仅影响马达的转矩，而且影响它的转速和转向。斜盘倾角越大，产生转矩越大，转速越低。

Working principle of radial plunger hydraulic motor: when the pressure oil enters the bottom of the plunger in the cylinder through the window of the fixed oil distribution shaft 4, the plunger extends outward and firmly presses against the inner wall of the stator, because there is an eccentric distance between the stator and the cylinder block. At the contact between the plunger and the stator, the reaction force of the stator on the plunger is. The force can be decomposed into two components, and. When the oil pressure acting on the bottom of the plunger is p, the diameter of the plunger is D, and the included angle between the force and is x, the force generates a torque on the cylinder block to make the cylinder block rotate. The cylinder block then outputs torque and speed through the transmission shaft connected to the end face. In the case of a plunger generating torque analyzed above, because there are several plungers acting in the oil pressure area, the torque generated on these plungers rotates the cylinder block and outputs torque. Radial piston hydraulic motors are mostly used in the case of low speed and high torque. Except for valve type flow distribution, other forms of axial piston pump can be used as hydraulic motor in principle, that is, axial piston pump and axial piston motor are reversible. The working principle of axial piston motor is that the oil distribution plate and swashplate are fixed, and the motor shaft is connected with the cylinder block and rotates together. When the pressure oil enters the plunger hole of the cylinder block through the window of the oil distribution plate, the plunger extends under the action of the pressure oil and clings to the swashplate. The swashplate generates a normal reaction force P to the plunger, which can be divided into axial component and vertical component Q. Q is balanced with the hydraulic pressure on the plunger, and Q causes the plunger to produce a torque to the center of the cylinder block, driving the motor shaft to rotate counterclockwise. The instantaneous total torque produced by the axial piston motor is pulsating. If the input direction of motor pressure oil is changed, the motor shaft rotates clockwise. The change of swashplate inclination a, that is, the change of displacement, affects not only the torque of the motor, but also its speed and steering. The greater the inclination angle of the swashplate, the greater the torque and the lower the speed.