Calculation of Crushing Force of Spring Impact Crusher

The most significant structural characteristic of the spring impact crusher is that the upper frame and lower frame are connected together with a spring group. The spring group has certain primary pressure. The resultant force of the primary pressure can overcome the crushing force in the normal crushing state to maintain the connection between the supporting ring and the lower rack. However, when the non-broken materials fall into the crushing chamber, the crushing force will dramatically increase. The resultant force of the primary pressure of the spring group is not enough to balance the crushing force which has increased. As a result, the support ring together with the adjustment ring and fixed cone liner are slightly raised by the non-broken materials. In fact, the spring group produces additional compression by turning one point to some angle around the flange of the rack until the discharging port which clips the non-broken materials increases to make the non-broken materials slide out of the crushing cavity. Then the supporting ring makes the fixed cone come back to the original position by the spring to continuously be crushed in the normal discharging port. Therefore, we can relatively correctively calculate out the normal crushing force and the maximum crushing force of the impact crusher according to the pressure data of the spring group which has been proved in the production practice.
For the 1750 and 2200 impact crusher, we can take the minimum value. For the impact breaker with other specifications, we can take the maximum value. When the non-broken materials fall into the crushing chamber, the fixed cone is raised so that the various groups of spring of the crusher can produce different additional compression deformation. It is very obvious when the fixed cone and the movable cone suffers from the maximum crushing force. The additional deformation of the spring is related to the size of the non-broken materials and the position of the materials in the crushing cavity.  If the size of the non-broken materials is equal to (0.85 ~ 0.95) ( e + s ), the non-broken materials with this size generally can not be stuck in the crushing chamber. If the size of the non-broken materials increases, they will be stuck in the crushing chamber and will not be discharged. The electrical system of the crusher will make the motor stop running. At this time, we should use other ways to calculate the crushing force of the moving cone and the fixed cone.  
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