Debugging of VE Distribution Pump for Diesel Generator 2

In this article, we will continue to introduce the debugging of the VE distribution pump for diesel generators.

3. Adjustment of return oil quantity: Check whether the return oil quantity reaches the specified value at the specified speed. The return oil volume and the pressure of the pressure regulating valve in the VE pump of the diesel generator have a mutual influence, and both need to be checked repeatedly.

4. Adjustment of full load oil quantity: Set the speed of the diesel generator VE pump to 1900r/min, and under the condition of LDA device inlet pressure of 0.1MPa, tighten the control handle against the high-speed limit screw to check whether the oil supply of the VE pump meets the requirements. Otherwise, adjust the maximum oil supply by adjusting the screw. The oil supply by screwing in the screw increases, while the oil supply by screwing out the screw decreases. At the same time, check whether the difference in fuel supply between each cylinder meets the requirements. In addition, it is necessary to check the full load oil level at other specified speeds. It should be noted that the fuel supply of the fuel injection pump and its internal chamber pressure affect each other. After adjusting the fuel supply of the fuel injection pump, it is necessary to recheck whether the internal chamber pressure exceeds the specified value.

5. Starting oil quantity: Adjust the speed of the diesel generator VE pump to 100r/min, check the oil supply of the VE pump, and it should meet the requirements.

6. Functional inspection of the oil stop device: Rotate the stop handle towards the direction of oil cut-off at the specified speed, and the oil supply of the VE pump should be less than the specified value. When cutting off the solenoid valve circuit at the specified speed, the oil supply of the VE pump should be less than the specified value.

7. Debugging of the automatic fuel injection advance angle regulator stroke: Remove the regulator cover and install the regulator detection device. Adjust the VE pump speed of the diesel generator to 1150r/min, and under the condition of an LDA device inlet pressure of 0.1MPa, the regulator stroke should be 1.6-2.0mm. If it does not meet the specified value, the thickness of the adjusting gasket of the regulator can be adjusted or the regulator spring can be replaced.

8. Adjustment of the starting point of LDA device operation: Tighten the control handle against the high-speed limit screw, adjust the VE pump speed to the specified value, guide compressed air with different pressure values into the LDA device, and check if it starts to work under the specified compressed air pressure. Otherwise, adjust the gear by turning the adjustment gear.

9. Adjustment of high-speed limit screw: Tighten the handle against the high-speed limit screw, adjust the high-speed limit screw to a starting speed 20-30r/min higher than the rated speed, and check if the parking speed meets the requirements.

10. Adjustment of idle limit screw: Tighten the control handle against the idle limit screw, adjust the VE pump speed to idle, adjust the idle limit screw to achieve the specified idle oil supply of the oil pump, and check that the oil supply of each cylinder is within the specified range. At the same time, check whether the idle stop oil speed meets the requirements.

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