What are the causes of large vibrations in the circulating hydrogen compressor?

The main causes of unit vibration: drop in bearing oil pressure, deterioration of oil quality； Low medium-pressure steam temperature with water content ； surge ； Liquid present at the compressor inlet ； Spindle bending ； Large clearance between the shaft and bearing bush ； The turbine impeller is damaged, disrupting its dynamic balance ； The corner bolts of the unit are loose.

What are the causes of large vibrations in the circulating gas compressor?

1. 5 Possible faults, their causes, and the maintenance procedures or methods. Fault – Possible cause – Handling method: Abnormal noises from the aircraft body 1. Wear of the crank pin in the main bearing. 2. Wear of the rod end bearing. 3. The bearing tightening bolts are loose. 4. Wear of the crosshead slider. 5. The piston tightening nut is loose. 6. The axial clearance of the piston rings is too large. 7. The filler tightening nut is loose. 8. The valve tightening nut is loose. 9. The fastening screw of the valve brake ring is loose. 10. Damage to the valve disc and spring. 1. Replace the bearing shells. 2. Replace the bearing shells. 3. Tighten the lock again. 4. Reattach the bearing alloy or replace the shimming. 5. Tighten the lock again. 6. Replace the piston rings. 7. Tighten the nut again. 8. Tighten the nut. 9. Tighten again. 10. Replace. Insufficient displacement. 1. Damaged valve. 2. Improper assembly causes the air valve to leak. 3. Carbon deposition on the gas valve. 4. Packing leakage. 5. Piston ring wear. 6. The intake filter is clogged. 7. Leaks in the piping system. 8. The sealing element is damaged. 1. Repair or replace. 2. Reassemble. 3. Clean. 4. Check or replace. 5. Replace. 6. Cleaning. 7. Exclude. 8. Replace. Fluctuations in intermediate pressure: 1. A faulty lower-level valve causes the pressure at this level to rise. 2. An increase in the primary suction pressure or an excessively high primary suction volume efficiency leads to an increase in various intermediate pressures. 1. Repair or replace. 2. Control the primary suction pressure and suction volume. 3. At the primary suction stage, the amount of air drawn in is small or the exhaust valve is severely clogged, resulting in insufficient exhaust volume and a drop in exhaust pressure. 3. Control the amount of intake gas at the primary level, and repair or replace the exhaust valve. Abnormal machine vibration 1. Insufficient foundation bearing capacity. 2. Loose anchor bolts, improper foundation, or poor construction quality. 3. The connection bolts of various machine components are loose. 4. Poor fixation of the piping causes vibration in the cylinder. 5. The machine is under excessive pressure or overloaded. 6. Water hammer occurs when gas carries liquid. 1. Strengthen the foundation. 2. Tighten the bolts to reinforce the foundation. 3. Tighten the connecting parts. 4. Reinforce or adjust the support points. 5. Control the pressure and reduce the load. 6. Identify the cause and eliminate it. Filler leakage 1. The piston rod is severely abraded or worn. 2. Poor packing assembly, small clearance, or the packing is expanded or inflexible. 3. The leak recovery tube is blocked, causing the leak to pass through the pre-fill material and escape. 1. Check, adjust. 2. Readjust. 3. Clean. Abnormal exhaust temperature 1. The valve of this machine is not installed properly, resulting in air leakage. 2. The lower-level gas valve is damaged or not sealed properly. 3. High inhalation temperature. 4. Low intake pressure, high exhaust pressure, and faulty pressure gauge. 5. Incorrect installation of the piston or piston rings leads to severe jamming, resulting in significant wear. 6. Severe fouling in the cylinders reduces cooling efficiency, or insufficient water volume causes the water temperature to rise. 7. Severe fouling of the cooler reduces its cooling efficiency, or insufficient water flow leads to an increase in intake air temperature. 1. Reinstall. 2. Repair or replace. 3. Control the inhalation temperature. 4. Control the inhalation pressure and check the pressure gauge. 5. Reinstall or replace the piston rings. 6. Clean the cylinder or increase the water supply. 7. Clean the cooler or increase the water supply. Drop in oil pressure or loss of gravity: 1. Severe leakage in the pipelines or oil pump. 2. The fuel tank or sump level is too low, or the fuel intake is blocked. 3. The oil filter is severely dirty and clogged. 4. The oil overflow valve is malfunctioning. 5. The oil pump’s operating capacity decreases. 6. The clearances at various lubrication points are too large. 7. Oil degradation (cleanliness, viscosity). 8. The pressure gauge is malfunctioning. 1. Inspect and remove leakage points. 2. Top up the lubricating oil or clean the oil port. 3. Check cleaning. 4. Inspect and repair, replace components. 5. Inspect and clean, and adjust the gap between teeth. 6. Adjust the clearance. 7. Replace the lubricating oil. 8. Repair or replace. Overheating of the bearing or crosshead slider: 1. Small clearance or uneven clearance. 2. Uneven contact and large installation errors. 3. The lubricating oil is too dirty, allowing debris to enter the friction pair. 4. Low amount of lubricating oil, high oil temperature, or oil supply interruption. 1. Check, adjust. 2. Readjust. 3. Replace the lubricating oil and repair or replace worn parts. 4. Appropriately increase the amount of lubricating oil and identify the cause of the oil cut-off.

It would be helpful to know what structure the compressor has – whether it is a reciprocating piston type, centrifugal type, diaphragm type, or screw type – as well as the operating condition of the unit. It’s also useful to know if it is a new unit or an old one that didn’t vibrate before; this information will facilitate proper analysis and judgment :lol

Faults, causes, and maintenance procedures or methods 1.5 Possible faults, causes, and maintenance procedures or methods Fault Possible cause Treatment method Abnormal noise from the aircraft body 1. Wear of the main bearing crank pin. 2. Wear of the rod end bearing. 3. The bearing tightening bolts are loose. 4. Wear of the crosshead slider. 5. The piston tightening nut is loose. 6. The axial clearance of the piston rings is too large. 7. The filler tightening nut is loose. 8. The valve tightening nut is loose. 9. The fastening screw of the valve brake ring is loose. 10. Damage to the valve disc and spring. 1. Replace the bearing shells. 2. Replace the bearing shells. 3. Tighten the lock again. 4. Reattach the bearing alloy or replace the shimming. 5. Tighten the lock again. 6. Replace the piston rings. 7. Tighten the nut again. 8. Tighten the nut. 9. Tighten again. 10. Replace. Insufficient displacement. 1. Damaged valve. 2. Improper assembly causes the air valve to leak. 3. Carbon deposition on the gas valve. 4. Packing leakage. 5. Piston ring wear. 6. The intake filter is clogged. 7. Leaks in the piping system. 8. The sealing element is damaged. 1. Repair or replace. 2. Reassemble. 3. Clean. 4. Check or replace. 5. Replace. 6. Cleaning. 7. Exclude. 8. Replace. Fluctuations in intermediate pressure: 1. A faulty lower-level valve causes the pressure at this level to rise. 2. An increase in the primary suction pressure or an excessively high primary suction volume efficiency leads to an increase in various intermediate pressures. 1. Repair or replace. 2. Control the primary suction pressure and suction volume. 3. At the primary suction stage, the amount of air drawn in is small or the exhaust valve is severely clogged, resulting in insufficient exhaust volume and a drop in exhaust pressure. 3. Control the amount of intake gas at the primary level, and repair or replace the exhaust valve. Abnormal machine vibration 1. Insufficient foundation bearing capacity. 2. Loose anchor bolts, improper foundation, or poor construction quality. 3. The connection bolts of various machine components are loose. 4. Poor fixation of the piping causes vibration in the cylinder. 5. The machine is under excessive pressure or overloaded. 6. Water hammer occurs when gas carries liquid. 1. Strengthen the foundation. 2. Tighten the bolts to reinforce the foundation. 3. Tighten the connecting parts. 4. Reinforce or adjust the support points. 5. Control the pressure and reduce the load. 6. Identify the cause and eliminate it. Filler leakage 1. The piston rod is severely abraded or worn. 2. Poor packing assembly, small clearance, or the packing is expanded or inflexible. 3. The leak recovery tube is blocked, causing the leak to pass through the pre-fill material and escape. 1. Check, adjust. 2. Readjust. 3. Clean. Abnormal exhaust temperature 1. The valve of this machine is not installed properly, resulting in air leakage. 2. The lower-level gas valve is damaged or not sealed properly. 3. High inhalation temperature. 4. Low intake pressure, high exhaust pressure, and faulty pressure gauge. 5. Incorrect installation of the piston or piston rings leads to severe jamming, resulting in significant wear. 6. Severe fouling in the cylinders reduces cooling efficiency, or insufficient water volume causes the water temperature to rise. 7. Severe fouling of the cooler reduces its cooling efficiency, or insufficient water flow leads to an increase in intake air temperature. 1. Reinstall. 2. Repair or replace. 3. Control the inhalation temperature. 4. Control the inhalation pressure and check the pressure gauge. 5. Reinstall or replace the piston rings. 6. Clean the cylinder or increase the water supply. 7. Clean the cooler or increase the water supply. Drop in oil pressure or loss of gravity: 1. Severe leakage in the pipelines or oil pump. 2. The fuel tank or sump level is too low, or the fuel intake is blocked. 3. The oil filter is severely dirty and clogged. 4. The oil overflow valve is malfunctioning. 5. The oil pump’s operating capacity decreases. 6. The clearances at various lubrication points are too large. 7. Oil degradation (cleanliness, viscosity). 8. The pressure gauge is malfunctioning. 1. Inspect and remove leakage points. 2. Top up the lubricating oil or clean the oil port. 3. Check cleaning. 4. Inspect and repair, replace components. 5. Inspect and clean, and adjust the gap between teeth. 6. Adjust the clearance. 7. Replace the lubricating oil. 8. Repair or replace. Overheating of the bearing or crosshead slider: 1. Small clearance or uneven clearance. 2. Uneven contact and large installation errors. 3. The lubricating oil is too dirty, allowing debris to enter the friction pair. 4. Low amount of lubricating oil, high oil temperature, or oil supply interruption. 1. Check, adjust. 2. Readjust. 3. Replace the lubricating oil and repair or replace worn parts. 4. Appropriately increase the amount of lubricating oil and identify the cause of the oil cut-off.