| NO. | Failure phenomenon | Cause Analysis | Method of exclusion |
| 1 | A certain level of pressure rise | 1. The intake valve of the next stage or the exhaust valve of this stage leaks, and the gas leaks into the cylinder of this stage2. The exhaust valve, cooler and pipeline are dirty and fouled, blocking the passage | 1. Clean the intake and exhaust valves, check the valve discs and springs, and grind the surface of the valve seat2. Clean the cooler and pipeline 3. Check the piston ring, stagger the positions of the locks and install them |
| 2 | A certain level of pressure drop | 1. Leakage of intake valve of this stage2. Piston ring leakage and piston ring wear and failure of this level 3. The pipeline connection is not sealed, causing air leakage | 1. Clean the exhaust valve, check the valve spring and valve disc, and grind the valve seat surface2. The lock ports of the piston ring are arranged in a dislocation, and the piston ring is replaced 3. Tighten the connection or replace the gasket |
| 3 | The compressor displacement is significantly reduced | 1. Air valve and piston ring leak2. The gasket of the piping system is not tightly compressed 3. Excessive female force or insufficient air supply in the intake pipe | 1. Check the valve and piston ring, but you should pay attention to the judgment according to the pressure at all levels in advance2. Replace the damaged gasket and tighten the connection 3. Check the gas supply pipeline and gas flow |
| 4 | Knocking sound in the cylinder | 1. The clearance between the piston and the cylinder is too small2. Metal fragments (such as valve springs, etc.) have fallen into a certain level of cylinder 3. Water enters the cylinder | 1. Adjust the gap between the cylinder and the piston with an adjusting shim2. Take out the fallen objects, such as the “puffing” of the cylinder and piston, which should be repaired 3. Remove oil and water in time |
| 5 | The knocking sound of the suction and exhaust valve | 1. The suction and exhaust valve piece is broken2. The valve spring is loose or damaged 3. When the valve seat is installed in the valve chamber, it is not set up or the compression bolt on the valve chamber is not tight. | 1. Check the air valve on the cylinder, and replace the severely worn or broken valve air with a new one2. Replace the spring that meets the requirements 3. Check whether the valve is installed correctly and tighten the bolts |
| 6 | Noise from rotating parts | 1. The large-end bearing bush and small-end bushing of the connecting rod are worn or burned2. The connecting rod screw is loose, tripping breaks, etc. 3. Cross head pin wear 4. The clearance at both ends of the crankshaft is too large 5. Belt wheel key wear or axial movement | 1. Replace the big end bearing bush and small end bushing2. Check whether the split pin is damaged. If the screw is found to be elongated or damaged, replace it 3. Replace the cross head pin 4. Replace with new bearings 5. Replace the key and tighten the nut to prevent displacement |
| 7 | The pressure gauge reading drops significantly or drops to zero | 1. The pressure gauge pipe joint is not tightened2. The pressure gauge is faulty 3. There is oil and water in the pressure gauge | 1. Check the pipe joint of the meter and tighten it2. Replace the pressure gauge 3. Blow off the oil and water in time |
| 8 | Lubricating oil pressure decreased | 1. Consider the dirty oil net or the lack of oil in the oil pool2. The leaking oil at the seal of the lubrication system sucks air into the oil inlet pipe 3. The motor reverses or the speed is lower than the rated speed 4. The lubricating oil is too thick and the oil cannot be absorbed | 1. Carefully clean the filter core, blow it clean with compressed air, and add oil to the oil pool according to the time2. Tighten the screws and replace the damaged gasket 3. Reverse the motor wiring and increase the speed 4. The lubricating oil is heated to reduce its concentration |
| 9 | Lubricating oil pressure rises | The oil hole in the crankshaft or connecting rod is blocked | Clean the oil holes and blow them with compressed air |
| 10 | The oil volume of the oil injector is abnormal | 1. The oil suction donkey net is blocked or the oil pipeline is blocked or there is a crack in the oil pipeline and oil leakage2. The wear pressure of the oil pump column and the pump body of the oil injector cannot meet the requirements 3. Improper oil injection adjustment, resulting in too much or too little oil | 1. Clean the filter screen, the oil pipe, and check the oil pipe to replace and repair the broken and leaking oil2. Repair or replace with new accessories 3. Re-adjust the oil injection pump process |
| 11 | The motor buzzes and the speed drops | 1. The fuse of a certain phase is blown, causing two-phase operation2. Friction between motor rotor and stator | 1. Stop immediately2. Check the motor |
| 12 | The ammeter indicates abnormal motor overheating | 1. The main bearing is burnt out2. The cross pin bushing is burnt out 3. The big end bearing bush of the connecting rod is broken | 1. Replace with a new one2. Replace with new accessories 3. Replace with new accessories |
| 13 | Bearing overheating | 1. The radial clearance between the bearing and the journal is too small2. The amount of oil is insufficient or the amount of oil is too high | 1. Adjust to the normal gap2. Check the oil supply |
| 14 | Vibration or noise | 1. The main body foundation is not solid2. The anchor bolts are loose 3. The bearing is faulty | 1. Check the cause of vibration, strengthen the foundation and install2. Tighten the nut 3. Adjust the gap or replace |
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Post time: Dec-17-2021