Universal grinder maintenance points 1. Repair and replacement of the screen. The screen is made of stainless steel plate punched. When the screen is worn or broken by foreign matter, if the damage is not large, it can be repaired by riveting or soldering; if the area is damaged, the new screen should be replaced. When installing the screen, the burr side of the screen hole should face inward, the glossy side should be facing outward, and the screen and screen frame should be tightly attached. When the ring screen is installed, the lap of the lap should be in the direction of rotation to prevent the material from getting stuck at the lap joint. Second, the lubrication and replacement of bearings. The bearings should be cleaned after every 300 hours of operation of the mill. If the bearing is oil lubricated, it is better to fill the gap of the bearing seat 1/3 when adding new oil, and the zui should not exceed 1/2. Just tighten the cap of the cap type oil before working. When the crusher bearing is seriously worn or damaged, it should be replaced in time, and pay attention to strengthen lubrication; if using tapered roller bearing, pay attention to check the axial spacing of the bearing to keep it 0.2-0.4 mm. If there is discomfort, increase or decrease Adjust the paper pad at the bearing cover. Third, the replacement of the toothed disc and the hammer. Among the pulverizing parts, the pulverizing sprocket and the hammer are the wearing parts in the pulverizer, and are also the main components affecting the pulverizing quality and productivity. The pulverizing sprocket and the hammer should be replaced in time after being worn. When the toothed disc crusher replaces the toothed disc, the disc should be pulled out first. Before pulling out, first open the round nut lock piece on the back of the disc, use a hook wrench to unscrew the round nut, and then pull the disc out with a special puller. In order to ensure the balance of the rotor operation, it is necessary to pay attention to the complete set of replacement when changing the teeth. After the replacement, static balance test should be done to make the crusher work stably. Be sure to tighten the nut when assembling the jaws, and be careful not to miss the spring washer. Qualified parts should be selected when changing teeth. The weight difference of a single toothed disc should be no more than 1.0-1.5 grams. The hammer of the hammer mill is symmetrical. When the sharp corner of the hammer is blunt, it can be used on the reverse side. If both ends of the hammer are worn, the head should be used. When adjusting the angle or turning the head, all the hammers should be carried out at the same time. After the four corners of the hammer are worn, they should be replaced completely, and the weight difference of each group of hammers should not be 5g; spindle, disc, positioning sleeve, pin shaft, hammer After installation, static balance test should be done to maintain the balance of the rotor and prevent the unit from vibrating. In addition, the pin of the fixed hammer and the circular hole of the mounting pin are worn out, the pin will be gradually ground, and the round hole will be gradually enlarged. When the pin diameter is smaller than the original size by 1 mm, the diameter of the hole is larger than the original size. When the size is 1 mm, it should be repaired or replaced in time.
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