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Bolt maintenance measures

2021-08-12

 Bolts are mechanical parts, cylindrical threaded fasteners with nuts. A type of fastener consisting of a head and a screw (cylinder with external thread), which needs to be matched with a nut to fasten and connect two parts with through holes. This type of connection is called bolt connection. If you unscrew the nut from the bolt, you can separate the two parts, so the bolt connection is a detachable connection, so how to maintain it?

1. Anchor bolts, stud bolts, always keep the vent holes of the vibration exciter unblocked (it is easy to cause oil leakage due to blockage). If the oil still leaks after being unblocked, the oil seal should be replaced.
2. The normal operation of the bearing should not exceed 75℃. Because the new exciter has a running-in process, the temperature may be slightly higher, but after 8 hours of operation, the temperature should stabilize. If the temperature continues to be too high, the oil level should be checked , Oil level and oil cleanliness.
3. Ensure that the labyrinth groove is filled with grease, and when working in a large amount of dust, the grease should be filled more frequently.
4. When replacing the V-belt, you should completely loosen the motor anchor bolts and put the V-belt into the pulley groove conveniently. It is not allowed to pry the V-belt with sticks or other objects. The tension of the V-belt must be suitable. It must be aligned, after adjusting the tension, work for 48 hours, and then readjust it again.
5. The bolts connecting the exciter and the screen box are not allowed to be replaced by ordinary bolts. The tightening conditions must be checked regularly, at least once a month. The loosening of any one of the bolts will also cause other bolts to be cut, causing damage to the screen machine.
6. Where the ring groove rivet is used for connection, it is allowed to use high-efficiency bolts instead. All contact surfaces or holes should be free of iron filings, ash, oil, rust and burrs.
7. The high-efficiency bolts, nuts and washers used must meet the requirements of "Technical Conditions for High-efficiency Large Hex Bolts, Large Hex Nuts and Washers for Steel Structures".
According to the force mode of the connection, it is divided into ordinary and reamed holes. According to the shape of the head: there are hexagonal head, round head, square head, countersunk head and so on. The hexagonal head is very commonly used. The countersunk head is generally used where connection is required.
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