Hammer (E) crusher - application case of frequency inverter

Working principle:

The material enters the crusher and is crushed by the impact of the high-speed rotating hammer head. The crushed material obtains kinetic energy from the hammer head and rushes towards the baffle inside the frame at high speed Screen strips At the same time, the materials collide with each other and are repeatedly crushed. Materials smaller than the gap between the sieve bars are discharged from the gap, while some larger materials are crushed again by the impact, grinding, and squeezing of the hammer head on the sieve bars, thereby obtaining the desired particle size output.

Precautions for using a frequency inverter:

One Due to uneven feeding during operation, it is easy to cause high current in the main unit, which can affect the frequency converter and cause overload (Err10) and overcurrent (Err02/03/04) faults

Solution 1: When selecting, increase the frequency converter host by at least 2 gears and feed the conveyor belt The vibrating screen motor is equipped with a frequency converter (amplification level 1), which controls the feeding speed of the conveyor belt through the host current (when the host current is high, AO1 outputs a 0-10V signal to the feeding frequency converter AI1 analog input). The feeding frequency converter is given The current size of the host forms a closed-loop PID control to meet the process requirements.

Solution 2: When selecting, increase the frequency converter by at least 2 gears and feed the conveyor belt The vibrating screen motor is equipped with a frequency converter (amplification level 1), which controls the feeding speed of the conveyor belt through the host current (when the host current is high, AO1 outputs a 10V-0V signal to the feeding frequency converter AI1 analog input).

Both of the above schemes start the feeding frequency conversion by delaying the output of relay 1, and emergency stop the feeding frequency conversion by setting the maximum current limit value through relay 2.

If the hammer crusher is used for secondary crushing, please keep the feeding frequency converter synchronized with the speed of the primary crushing feeding system (to prevent further feeding when the feeding motor slows down).

Wiring diagram:

Solution 1: Feed PID with corresponding parameters:

Master

Feeding

Solution 2: Feed analog quantity with corresponding parameters given:

Master

Feeding

The above two schemes need to be matched with the parameters of the host and feeding system according to the actual situation on site. Unreasonable parameter settings can lead to overload and overcurrent faults of the host or too frequent start stop of feeding.