What are the key points for the use and maintenance of diesel generator injectors?
Diesel generators should avoid long-term overload operation to prevent the body from overheating and causing the needle valve coupling of the injector to be stuck. For diesel engines that have been stored for a long time, the fuel injector should be removed and immersed in clean diesel oil to prevent the needle valve from being corroded and unable to open and close flexibly.
The use and maintenance of diesel generator fuel injectors can be improved from the installation position of the fuel injector pad, regular inspection, adjustment of fuel injector and
Fuel Injection Pump fuel supply advance angle, seasonal oil change and regular maintenance of diesel filters, careful cleaning and Replace the needle valve assembly, avoid the needle valve from being stuck, ensure that the diameter of the injector hole meets the technical requirements, and avoid long-term overloading of the diesel engine. In this article, Qihao, a professional diesel generator manufacturer, will give you a detailed introduction. (1) Improve the installation position of the injector pad. Because metal is most prone to wear and tear when working under high temperature conditions, while the nozzles of pintle and hole injectors protrude into the combustion chamber, most of the surface is in direct contact with the gas and is baked by high temperature and high pressure gas. It is the main reason for the wear of the needle cone surface of the injector and the guide surface of the needle valve. For pintle injectors, in order to prevent the entire injector from being baked by gas, a pure copper gasket of appropriate thickness can be installed on the head of the injector; for hole injectors, a V-shaped gasket can be installed, The design of the V-shaped gasket should make the outer diameter as large as possible, and the inner hole as large as possible at the top and small at the bottom, so as to facilitate disassembly and assembly when replacing the fuel injector to prevent gas intrusion. (2) Check and adjust the fuel injector on schedule. The fuel injector should be checked and adjusted every 1000 hours or so. If the opening pressure is lower than the specified value, the needle valve should be unloaded, put it into clean diesel oil, scrape off the carbon deposit with wood chips or copper chips, dredge the nozzle hole with fine iron wire, and then debug after reinstalling. It is required that the injection pressure difference of each cylinder on the same diesel engine must be less than 1.0MPa. (3) Check and adjust the fuel supply advance angle of the fuel
Injection Pump on schedule. In order to make the diesel injected into the cylinder by the injector mix evenly and burn completely, it is necessary to check and adjust the fuel supply advance angle of the fuel injection pump regularly. If the fuel supply time is too early, it will make it difficult for the diesel engine to start, and failures such as cylinder knocking and increased vibration will occur; if the fuel supply time is too late, it will cause black smoke from the exhaust pipe, excessive engine temperature, and increased fuel consumption. . (4) Change the oil according to the season and maintain the diesel filter on time. Due to the high precision of the needle valve assembly and the small hole diameter of the injector, it is necessary to strictly select the clean diesel oil of the specified brand according to the seasonal changes, and maintain the diesel filter on time, and often discharge the oil in the filter and the fuel tank. Precipitated oil to prevent the intrusion of dust and impurities and accelerate the wear of the needle valve coupling. (5) Carefully clean and replace the needle valve coupling. When replacing the needle valve assembly, soak the needle valve assembly in 70~80°C hot diesel oil for 10 minutes, and then move the needle valve back and forth in the valve body in clean diesel oil to clean it thoroughly. In this way, the fault of sticking the needle valve due to the melting of anti-rust oil can be effectively avoided when the injector is working. In addition, when cleaning the needle valve assembly, do not touch it with other hard objects to prevent the needle guide surface from being scratched. (6) Prevent the needle valve from being stuck. When you loosen the high-pressure oil pipe joint, if you see a lot of bubbles or oil foam coming out, it means that the needle valve has been stuck in the open state, so that the compressed gas generated when the cylinder is compressed flows back into the high-pressure oil through the injector. At this time, if you touch the high-pressure fuel pipe with your hands, you will not feel the diesel pulsation or the pulsation is weak. If the needle valve is stuck, the fuel injector of this cylinder will not work well or not work due to the presence of particles in the oil and residual iron filings in the fuel injector. At this time, the needle valve coupling should be cleaned and assembled again. (7) Ensure that the diameter of the nozzle hole of the fuel injector meets the technical requirements. If it is determined that the insufficient fuel injection pressure of the injector is caused by the expansion of the nozzle hole, for a single-hole pintle injector, a steel ball with a diameter of 4-5mm can be placed at the end of the hole and gently tapped with a small hammer. Make the nozzle hole partially plastically deformed to reduce the hole diameter; for the multi-hole direct injection injector, because of its large number of holes and small hole diameter, it can only be lightly tapped on the hole end with a special punch. If the technical requirements are still not met after reinstallation, the needle valve coupling should be replaced. (8) Avoid long-term overloading of the diesel engine. The diesel engine should avoid long-term overload operation to prevent the body from overheating and causing the needle valve coupling of the injector to be stuck. For diesel engines that have been stored for a long time, the fuel injector should be removed and immersed in clean diesel oil to prevent the needle valve from being corroded and unable to open and close flexibly. With a modern production base, a professional technical research and development team, advanced manufacturing technology, a complete quality management system, and remote monitoring Qihao cloud service guarantee, we provide you with a comprehensive and considerate one-stop service from product design, supply, commissioning, and maintenance. Type diesel generator set solution.
