The impact crusher uses the impact force to crush materials, with a high crushing rate, and the particle shape of the product is mostly cubic. The impact crusher is more suitable for crushing materials with hardness below medium, low humidity, low viscosity and low fine powder content, such as limestone, dolomite, gypsum, activated clay, etc. In the process of use, if the broken material is still the same material, the humidity and hardness are unchanged, and the specification requirements for the finished material are also the same, but the quality of the material produced is quite different from the previous one, then it needs to be adjusted. Impact crusher discharge opening clearance.
It should be noted that the adjustment of the discharge gap of the discharge must be carried out in the shutdown state, and there is no material to be crushed in the crushing cavity. Next, let’s talk about how to adjust the discharge gap of the impact crusher.
(1) Adjustment of discharge clearance:
Before the impact crusher leaves the factory, the factory will make rough adjustments. It needs to be adjusted after no-load test run or replacement of a new blow bar, wear of the blow bar, and increase of the discharge gap.
The schematic diagram of the adjustment counterattack part is as follows, mainly composed of: 1. Pull rod, 2. Small nut, 3. Screw rod, 4. Backup nut, 5. Spring, 6. Counterattack plate (S section) 7. Wear-resistant plate ( T segment).
There is a spring in the adjustment counter-attack part, which has the function of elastic cushioning. When small pieces of unbreakable objects enter, the spring No. 5 is compressed, and the discharge opening is enlarged, and the unbreakable objects are discharged out of the crusher body, and return to their original shape under the action of elasticity.
(2) Adjustment of gap size
a. When adjusting the gap, open the observation door of the lower frame, loosen the nuts No. 2 and 4 and turn the screw to the left to adjust the nut No. 3, the spring will retreat, the gap between the top of the blow bar and the impact plate will increase, and the inspection gap should be smaller than the required gap size 10-20mm, and the gap will increase by 10-20mm by tightening the nut No. 2 to pre-tighten the spring. Tighten the nut to achieve the required clearance.
b. Due to the wear of the blow bar and the lining plate, when it is necessary to reduce the gap, open the observation door of the lower frame, loosen the nuts No. 2 and 4, and turn the screw to the right to adjust the nut No. 3. The hammer gap becomes smaller, and the inspection gap is 10-20mm smaller than the required gap size, and the gap will increase by 10-20mm by tightening the serial number 2 nut to pre-tighten the spring. Tighten the nut to achieve the required gap; when replacing the blow bar to get the impact plate, adjust the gap to be greater than 30mm.
For example: the existing gap is 30mm, and the process that needs to be adjusted to a gap of 60mm is: a. Adjust nuts No. 2 and 4, the left-hand screw to adjust nut No. 3, move the screw back 15-20mm, and then tighten nut No. 2 10-15mm. (It should be adjusted according to the condition of the spring), check and adjust to 60mm and prepare the nut number 4 for tightness.
