Based on the analysis of the dynamics of impact jaw crusher, the mobile parameters and the changing rules of inertial force (inertial moment) are obtained; the determination of the balance mass and setting angle according to the minimising left inertial force is presented; a calculation formula for determining the optimizing balance mass and setting angle is also described in this paper.

In the light of the reliability theory,principles of fuzzy optimization and having taking various fuzzy factors influencing the jaw plate size and strength into account,the mathematical model and method for the fuzzy optimization design of the jaw plate reliability of jaw crusher is advanced.

This peper proposes a reasonable chamber profile design, and establishes the design model of the crushing chamber and optimizing method for a single toggle jaw crusher on the basis of the analysis on the capacities at various sections of crushing chamber.

Rational selection to tolerances,fits and clearance of rotor-bearing of impact crusher is very important to avoid overheat of bearing and prolong the life of bearing.

Considering the changes of the impact energy,according to the mass balance and comminuted classification,simulation and experiment at different rotor velocities and feed rates,a logical model for impact crusher that is able to predict the crusher’s performance at steady state and contains a reasonable number of parameters has been developed.

According to the mass balance and comminuted classification,considering the changes of the impact energy,simulation and experiment at different rotor velocities and feed rates,have developed a logical model for impact crusher that is able to predict the crusher performance at steady state and contains a reasonable number of parameters.

The basis on structure characteristics of the upright impingement crusher,analyzed a certain method of the model basic parameter,such as the rotator line speed,rate of production and the electric motor power etc.