Plan analysis for the swinging cylinder in the hydraulic wrench;

For the swinging cylinder type of hyd raulic wrench,through the analysi s and calculation for the locating parameters of its executive mechanism,formul a and design precondition of the lo-cating parameters are presented,wi th whic h the minimum of pushing force of the oil cylinder can be achieved under definit e swinging angle and given loosening &tighteni ng torque for the fasteners.

The typical nonlinear characteristics of the pneumatic rotary actuator position servo system using proportional flow valves are experimentally studied.

A pneumatic rotary actuator angular position servo system is studied,which adopts 3-port proportional flow valve as a control device.

This paper studies the velocity stability of rotary cylinder with eccentric load.

To determine the influence of eccentric load on the motion of rotary cylinder mounted vertically quantificationally,a mathematic model was built and the simulation results show that the angular acceleration curves of rotary cylinder have distinguishing dual hump-shaped feature.

Based on advanced industry computer and high reliability integration singnal conditional modules,the on-line torque measurement facility of backrest angle adjuster,which drived by a swing cylinder,could test the torque and modulate angle accurately.