Q: Why is the supercharger is the most likely to fail on the engine parts?
A: Because the rated working speed of the supercharger in more than 130,000 revolutions per minute, and at the exit of the exhaust manifold, the temperature is extremely high (more than 800 ℃), intake and exhaust pressure is also greater, that is, high temperature, high pressure, high speed, so the supercharger lubrication and cooling and sealing requirements are relatively high. In order to ensure the service life of the supercharger, in the design to ensure the lubrication and cooling of the supercharger floating bearing, at the same time, in use requires that.
① The engine should idle for 3-5 minutes after starting, do not immediately increase the load to ensure good lubrication of the supercharger. The main reason is that the supercharger is located at the top of the engine, if the engine starts after the supercharger immediately start running at high speed, it will lead to oil pressure does not rise in time to the supercharger oil supply, resulting in oil shortage damage to the supercharger, or even burn the entire supercharger.
② Idling time should not be too long, generally not more than 10 minutes, idling time is too long, easy to cause the compressor end oil leakage.
③ Do not immediately turn off the engine before parking, should idle for 3-5 minutes to make the supercharger speed and exhaust system temperature down, to prevent the occurrence of back to heat caused by oil coking and bearing burn and other failures. Regular incorrect use will damage the supercharger.
④ The engine that has not been used for a long time (generally more than 7 days), or the engine with a new supercharger, should be filled with oil at the oil inlet of the supercharger before use, otherwise it will reduce the life of the supercharger or damage it due to poor lubrication.
⑤ Check regularly whether there is loose air/_oil leakage in each connection part, and whether the oil return pipe is smooth, if it should be excluded in time.
⑥ Ensure that the air filter is clean and replaced regularly as required.
⑦ Replace the oil/_oil filter regularly.
⑧ Regularly check the radial axial clearance of the booster shaft, the axial clearance should be no more than 0.15 mm, the radial clearance is: the clearance between the impeller and the pressure shell is not less than 0.10 mm, otherwise it should be repaired by professionals to avoid expanding the loss.