Gasoline generator set maintenance learn trial commissioning

Gasoline generators are generally purchased as spares, so they are always waiting for use, but they are rarely used. In the normal state, the generators are in a standby state, lack of detection, maintenance, etc., but the generators are also necessary. Indispensable standby power supply, if it is discovered in an emergency that the generator can not be used, it is not very crazy to introduce the solution below, in fact, can maintain the performance of the generator through regular maintenance means to achieve the purpose , and maintenance requires understanding of the following areas.

Gasoline engine generally includes: body, crank connecting rod mechanism, gas distribution mechanism, fuel system, lubrication system, cooling system, electrical system.

Body: It is the skeleton of the gasoline engine. It supports and installs other components including: cylinder block, cylinder liner, cylinder head, cylinder pad, oil pan, flywheel housing, timing gear housing, front and rear feet.

Crank connecting rod mechanism: It is the main moving part of the gasoline engine. It can convert the energy generated by fuel combustion through pistons, piston pins, connecting rods, crankshafts and flywheels into mechanical energy, including crankshafts, connecting rods, pistons, and piston pins. Piston pin retainer, piston pin bushing, piston ring, main bearing, connecting rod, thrust bearing, crankshaft front and rear oil seal, flywheel, shock absorber, etc.

Gas distribution mechanism: It is timed to open and close exhaust valves, including timing gears, camshafts, uprights, top rods, rocker arms, valves, valve springs, valve seats, valve guides, valve locks, and Exhaust pipe, air filter, supercharger, etc.

Fuel supply system: According to the needs of gasoline generators , regular, quantitative fuel supply to the combustion chamber, including the fuel tank, the oil pipeline, fuel filters, fuel injection pumps, fuel injectors and so on.

Lubrication system: Lubricating oil is supplied to each moving friction pair, including oil pump, oil filter, pressure regulating valve, piping, instrument, oil cooler and so on.

Unit commissioning and commissioning

1) No-load operation of the unit: Start the no-load test of the gasoline generator manually with the starter of the unit and check the rotation of the unit and the abnormality of the mechanical transmission. Is the Ito generator's oil supply and oil pressure normal? Is the cooling water temperature too high? Whether automatic and manual control meets the requirements, if problems are found, promptly resolve.

2) After the gasoline generator has passed the test without any load, the temperature rise of the airframe and the bearing shall be checked. Only the no-load test of the unit is allowed to carry out the load test.

3) Detecting the protection performance of the unit: Using the instrument to simulate and issue low oil pressure, high cooling water temperature, over voltage, etc. The unit should immediately start the protection function and make an alarm.

4) The phase sequence table is used for the nuclear phase of the mains and generator power supply. The phase sequence should be consistent.

5) Unit load test: The unit generates power at rated speed, check the main indicators of the unit with load operation, respectively, run at 25% load for 1 hour, 50% load for 1 hour, 75% load for 2 hours and 100% load Run for 0.5 hours, test results should meet the unit design requirements.

6) Full-load test of the unit: Perform all performance tests of the unit under full-load conditions and complete the unit's full-load operating time as required.

7) With the system linkage debugging: artificially cut off the mains power, the main unit should be able to automatically start and supply power to the load within the time required by the design, restore the utility power, the unit will automatically stop.

The exhaust gas of the gasoline engine can be led to the outside by an external exhaust pipe. The exhaust pipe should not be too long. The pipeline should not be turned too quickly. The elbow should not be more than three. The internal diameter of the external exhaust pipe should be in accordance with the design technical documents, and the general non-supercharged gasoline engine. Not less than 75MM, booster gasoline engine is not less than 90MM, booster gasoline engine exhaust back pressure must not exceed 6kpa, exhaust temperature is about 450 °C, the exhaust pipe should be able to fire the direction of installation should pay special attention to debugging operation to be Check the above requirements.

8) Trial acceptance: Test the switch equipment on the power receiving side, automatic or manual, and protection devices. After the test passes, carry out the load test according to the designed standby power distribution plan, and the unit and the electrical device are running without failure. Before acceptance.