First, check the battery. Since backup power is not used often, the key to whether the generator can start normally lies in battery maintenance. If there is a problem with the battery, a common situation is: there is voltage but no current. At this time, you can hear the sound of the starter solenoid valve closing, but the coupling shaft cannot be driven.
There are three reasons why the machine cannot be stopped due to battery problems:
1. Stopping battery charging during testing will result in insufficient battery charging.
2. The mechanical oil pump is driven by a belt. The pump oil volume at rated speed is large. However, the battery does not provide enough power, causing the leaf spring to become stuck in the shut-off valve. not being able toensure tightness due to insufficient suction of the solenoid valve when stopping. Fuel sprayed from the four oil outlets prevented the engine from stopping.
3. Home batteries typically have a lifespan of two years and are not replaced regularly.
Second, start inspecting the solenoid valve. When the generator is running, people have summarized a set of inspection methods: first look, second listen, third touch and fourth smell. Listening at startup is a very important step. Taking the American origin Cummins generator as an example, you just need to press the start button and it will start after three seconds. Two clicks can be heard during these three seconds. Once the second sound is no longer audible, check to see if the start solenoid valve is working properly. If the solenoid coil is blown, the generator will of course not start.
Third, check the diesel and lubricating oil. Since the unit remains in a static state for a long time, the different materials of the unit itself will undergo complex chemical and physical changes with engine oil, cooling water, diesel, air, etc. ., thus causing deterioration of the unit. This is why attention should be paid to the oil issue. For fire safety reasons, diesel fuel tanks are usually placed in a closed room. Since water vapor in the atmosphere condenses due to temperature changes, water droplets form and cling to the inner wall of the fuel tank and flow into the diesel fuel, thus causing water. Diesel fuel content exceeds the standard. Such diesel entering the high pressure oil pump of the diesel engine will corrode the precision coupling piston and damagewill seriously manage the unit. Generator lubricating oil has a shelf life. When stored for a long time, the physical and chemical properties of the lubricating oil change, causing the lubrication conditions to deteriorate when the unit is operating and easily damaging the generator parts.
What should I do if there is air in the high pressure oil pump of the diesel generator?
The suction power of the engine is strong enough to suck up people. Standing in front of a running engine is dangerous.
The engine core adopts a double rotor structure, including the intake tract, compressor, combustion chamber, turbine, rear nozzle and other parts. Engine accessories, including generators, oil lines, air lines, etc., are located outside the main engine. The white spiral on the front fairing coneis mainly used to repel birds. When the engine is running, it mostly looks like an eagle's eye.
The engine is large in size and weight, and is about the same size as a small car. The air intake duct (engine opening) can accommodate an adult in a semi-standing position. The thrust of the engine is very important. Generally, commonly used 737-300/400 passenger aircraft are equipped with CFM56-3 turbine engines. The thrust of a single engine is 18,000 to 22,000 pounds, or about 8,000 tons. How big is this surge? For example, the motor can vacuum a room of several tens of square meters in one second. The current largest thrust of the engine can reach about 55 tons.
After the fuel injection pump of the diesel engine which is the driving force of the diesel generator set is connected to the oil circuit, a sealed circuit is formed when there is air inthe original body, the diesel. the engine will not be able to supply oil and will stop working. At this point, the operator must first check whether the amount of diesel in the fuel tank has been exhausted and whether the inlet pipe has left the oil level. Second, check whether the fuel tank air outlet is blocked, causing a problem; vacuum and negative pressure in the oil line and making it impossible to supply diesel. After the fuel injection pump of the generator set diesel engine is connected to the oil circuit, a tight circuit is formed when there is air in the original body. , the diesel engine will no longer be able to supply oil and will stop working. At this time, the operator should first check whether the amount of diesel in the fuel tank has been used up and whether the inlet oil pipe has left the oil level. Second, check whether the fuel tank air outlet is blocked, prthus evoking; a vacuum and negative pressure in the oil line to prevent oil supply, then loosen the bleeder screw in the fuel injection pump and pump the oil with a manual oil pump if a large number of bubbles or oil foam appear and the oil supply is insufficient. not smooth, this means that the low pressure oil circuit is also blocked. At this time, the coarse and fine diesel filters should be checked if the cleaner is clogged, if there are cracks or defects in the oil lines. the seals at the joints of each oil line have been forgotten to be installed, or the seals have been damaged, causing a leak or air trap. When the manual oil pump pumps oil, the oil supply is smooth but there is no pressure. This is mainly because the spring of the oil return relief valve of the injection pumpIf the fuel ball is broken or tired and deformed, the steel ball is worn or dirty. is damped and the seal is not tight, causing the pressure of the low pressure oil line to be too low, causing insufficient fuel supply to the fuel injection pump. When checking the sealing effect of the oil return relief valve, block the oil inlet with your hand and blow with your mouth, otherwise the seal is not tight when pumping from oil with a manual oil pump. , you should feel elasticity and pressure when you shake the handle. It's easy when you release the handle or it will automatically return. For old-fashioned manual oil pumps, you should also check if the oil path between the fuel injection pump inlet pipe and the fuel tank is blocked. If there is a blockage, it is mainly due to the oil inlet filter.ile under the oil transfer pump. being blocked by dirt or the seal being damaged. When pumping oil with a manual oil pump, I don't feel any suction when I press the handle, I feel a lot of resistance. The main reason is that the oil path between the oil pump and the oil pump is blocked. Most of the reasons are because the fuel injection pump oil inlet screw and overflow valve are installed backwards, the transfer pump check valve oil pump is installed backwards or is too worn, the rubber sealing ring of the manual oil pump is installed. be aged and damaged, etc. If there are a large number of bubbles in the injector return pipe, this is mainly caused by the injector nozzle of a certain cylinder being stuck in the open position and the high pressure gas in the cylinder escapes into the body ofthe injection pump. Remove one end of the oil return pipe connected to the oil filter, block the oil return port of the filter and the bubbles disappear, indicating that the fault is with the injector. Then find out which cylinder injector assembly is blocked and eliminate it. Tai'an Hengdong Power Generation Equipment Co., Ltd. specializes in the production of “Taishan Hengdong” brand oil diesel (gasoline) generator sets. Main products and specifications: GF series 5-2400KW diesel generator set; EC/EA series gasoline generator set 1.3-30KVA; GFS Series 10-1200KW Low Noise Diesel Generator Set;0KW Automated Diesel Generator Set; GT Series 5-700KW Mobile Power Plant. Contact person: Ding Li