Through contrasting some kinds of break systems used to the downward belt conveyor,this paper abstract characteristic and dominant position of YZQ hydraulic speed regulating brake.

The structure,performance and main technical parameters of Type TYQ78 hydraulic governor is expounded,with emphasis on its draft design,technology and test results.

The diesel engine of 6260 ZC type was successfully fitted in with the hydraulic governor by pneumatic control of PGA-12 type produced by Woodward Company, thus solving the key problem of implementing the remote control function of the diesel engine.

For the low usage of engine power of a diesel generating set with a large inertia flywheel under impulse load, the problem which may be caused under this instance by double feedback hydraulic governor is found through analysis, and the way for solving the problem is proposed, then stability analysis and simulation validation of the system are performed.

Based on the dynamic simulation of impulse load of a power plant system with hydraulic governor ,methods for improving dynamic performance of this kind of systems are presented, and the dynamic performance requirements are satisfied by way of adjusting some system parameters.