What to do if the main engine emits abnormal noise when the screw air compressor is running

Fault phenomenon of abnormal noise from the main engine during the operation of screw air compressor: The main engine of the air compressor vibrates and produces loud noise. During operation, it sometimes emits metal collisions, impacts, uniform knocking sounds, friction whistles, etc. I believe many users often encounter this problem. What should we do if the main engine emits abnormal noise when the screw air compressor is running? Next, we will provide a detailed solution to the abnormal noise emitted by the screw air compressor host.

Reason for abnormal noise from the main engine when the screw air compressor is running:
① The belt is too loose, and the groove fit between the active and passive belts is too large, causing slipping and producing a whistling sound; (Belt drive type)
② When the screw air compressor is running, the oil supply is not timely, causing the male and female screws to bite directly without lubricating oil lubrication, resulting in metal dry friction and howling;
③ Loose anchor or inlet filter screen fixing bolts;
④ Loose fastening gear nuts, resulting in excessive backlash and impact noise;
⑤ The intake valve is not tightly closed and leaks a large amount of air, causing vibration in the reverse check of the intake valve.
⑥ The host drops something in, causing the yin and yang screws to collide and produce a whistling sound;
⑦ Excessive clearance between the male and female screws and the bearing end face;
⑧ The host bearing is damaged.

Solution to abnormal noise from the main engine when the screw air compressor is running:
① Replace the belt and adjust the tightness of the belt;
② Check the oil level, replace the oil filter, add oil to the main engine of the air compressor, and let the oil soak at least 3/4 of the rotor.
③ Check and tighten the bolts, and realign the air compressor;
④ Check the vibration situation and confirm that the fastening gear nuts are loose for repair;
⑤ Adjust the position of the intake butterfly plate;
⑥ Solution: Conduct a major overhaul of the host.