Roller gap regulation system for crusher

The invention discloses a roller gap regulation system for a crusher. Bearings are arranged in adjustable bearing pedestals, action rollers penetrate through the bearings through extending shafts, the adjustable bearing pedestals and linear motors are mounted on guide rails in a sliding manner, and the linear motors are connected with the adjustable bearing pedestals through connecting rods and nuts; buffer hydraulic cylinders are fixed on a machine frame of the crusher, extending rods of the buffer hydraulic cylinders are connected to the adjustable bearing pedestals, and the buffer hydraulic cylinders are arranged in parallel with the linear motors; displacement sensors are connected between the linear motors and the adjustable bearing pedestals; pressure sensors are electrically connected to the buffer hydraulic cylinders, and are mounted in the buffer hydraulic cylinders; proportional pressure control valves, overflow valves and one-way valves are connected in parallel between the buffer hydraulic cylinders and energy accumulators; a programmable controller is electrically connected to the displacement sensors, the pressure sensors and input equipment. The roller gap regulation system has the beneficial effects that the crushing discharging granularity can be accurately and rapidly regulated, a synchronous constant load withdrawal protection function can also be realized when the crusher is overloaded, and the system is low in maintenance cost and high in practical application value.