Main Causes of Gas Valve Leakage in 100KW Generators

When we confirm that the fuel supply system of the 100 kW generator is not faulty, we can diagnose and analyze whether there are any abnormalities in combustion and compression during the inspection. During our observation, we heard the sound of “chichi” airflow in the intake and exhaust pipes when starting, which means that there is air leakage in the intake and exhaust valves. In fact, the reasons for the air leakage of the intake and exhaust valves are: improper adjustment of the valve clearance or too small valve clearance. If the pressure reducing valve is adjusted too tightly, the valve will not close tightly and cause air leakage. After troubleshooting this problem, check the valve leakage of the 100 kW generator. The main reasons for the valve leakage are:

1. The sealing ring of the valve and the valve seat is ablated;

2. The sealing ring between the valve and the valve seat is too wide or the sealing ring is stained with debris;

3. The carbon deposit on the valve stem is serious, the duct is occluded, the valve stem is bent, and the valve is not closed tightly;

4. The valve spring is broken, or the elasticity becomes weak;

5. The clearance between the valve stem and the conduit exceeds the limit due to severe wear.

Fuel supply advance angle is not allowed. When adjusting, loosen the three fixing nuts on the fuel injection pump, and properly adjust the assembly angle of the fuel injection pump. If the fuel supply time is too late, turn the upper part of the fuel injection pump toward the body, and if the fuel supply time is too early, turn the upper part of the fuel pump outward. If the oil supply time cannot be adjusted after turning to the limit, there is an error in the gear assembly.

(1) The marks are right or wrong, and the marks may be right or wrong. One is that the gear marks are in the wrong position; the other is that the marks on the gears are not aligned one by one during assembly. The wear of the camshaft in the oil pump will also affect the oil supply time. This kind of failure must be repaired by the staff.

(2) The keyway of the gear of the fuel injection pump is not aligned with the semicircular key on the shaft of the fuel pump.

Main Causes of Gas Valve Leakage in 100KW Generators


Post time: Dec-23-2022