First, screen repair and replacement. The screen is made of thin steel or iron perforated. When the screen is worn or broken down by foreign matter, if the damage area is not large, it can be repaired by riveting or tin welding; If large area damage, should be replaced with a new screen. When installing the screen, the side of the screen hole with burrs should face in, the light side should face out, and the screen sheet and screen frame should be tightly fitted. When the ring screen is installed, the stubble of the lap inner layer should follow the rotation direction to prevent the material from getting stuck at the lap.
2. Lubrication and replacement of bearings. The bearing should be cleaned after every 300 hours of work. If the bearing is lubricated by oil, it is appropriate to fill 1/3 of the bearing seat gap when adding new oil, at least 1/2, and only need to tighten the normally covered oil cup lid a little before operation. When the crusher bearing is seriously worn or damaged, it should be replaced in time, and pay attention to strengthen lubrication; The use of tapered roller bearings, should pay attention to check the bearing axial spacing, so that it is maintained at 0.2-0.4 mm, if there is discomfort, can be adjusted by increasing or decreasing the paper pad at the bearing cover.
Three, tooth claw and hammer replacement. Among the crushing parts, the crushing claw and hammer are the wearing parts in the feed crusher, and also the main parts that affect the crushing quality and productivity, and the crushing claw and hammer should be replaced in time after wear. When replacing the claw, the disc should be pulled out first. Before pulling out, first open the round nut lock piece on the back of the disk, use a hook wrench to unscrew the round nut, and then use a pull to pull out the disk. In order to ensure the balanced operation of the rotor, the teeth should be replaced in a complete set, and the static balance test should be done after the replacement to make the crusher work stably. When assembling the jaw, be sure to tighten the nut, and be careful not to miss the spring washer. When changing the teeth, qualified parts should be selected, and the weight difference of a single tooth claw should not be greater than 1.0-1.5 grams.
The hammer of the hammer mill is symmetrical, and when the sharp Angle of the hammer is blunted, the reverse Angle can be adjusted. If one end and two corners are worn, they should be turned around. When adjusting the Angle or turning the head, all the hammer should be carried out at the same time, after the four corners of the hammer wear, they should be replaced, and pay attention to the weight difference of each group of hammer shall not be greater than 5 grams; After the spindle, disc, positioning sleeve, pin and hammer are installed, static balance test should be done to maintain the balance of the rotor and prevent vibration of the unit. In addition, the pin of the fixed hammer and the round hole of the installation pin due to wear, the pin will gradually grind fine, the round hole will gradually grind larger, when the diameter of the pin is 1 mm smaller than the original size, the diameter of the round hole is 1 mm larger than the original size, should be welded or replaced in time.
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