The pull cylinder failure of diesel generator is the striped, colored damage along the direction of piston movement on the surface of cylinder and piston ring. When the diesel generator sets pull cylinder failure, the wear of the cylinder liner is very severe, can reach tens or even hundreds of times the normal wear. Pulling cylinder failure of diesel generator set

1. The external characteristics of diesel generator set after cylinder pulling are sound changes and black smoke exhaust.

2 piston, piston ring and cylinder liner working surface is damaged, gas seal failure, oil consumption and gas transmission rapidly increase, so that the engine can not operate normally, even in a very short time, due to the piston, piston ring and cylinder liner bite and stop. Cause of pulling cylinder failure of diesel generator set

1. The main cause of cylinder pulling is actually the "fusion" strain of the piston, piston ring and cylinder liner surface due to high temperature. That is, the piston does not produce dry friction between the cylinder liner due to the interruption of the oil film, and the hot friction heat causes the microscopic melting and sticking of the metal, and the nearby metal particles are torn off.

2. The fundamental cause of cylinder pulling of diesel generator set is oil film interruption. According to the requirements of gas sealing, the clearance between the piston ring and the cylinder liner should be as small as possible, which makes their lubrication conditions very unfavorable. When the contact surface is overloaded, the cylinder liner surface and the piston ring working surface due to direct contact and intense friction, a lot of friction heat, so that the temperature of the working surface rises sharply, the result is that the two friction surface fusion adhesion caused by tension.

It can be seen that the oil supply condition is poor, gas channeling is serious, the contact stress of the parts is too large damage to the oil film, is the main cause of the cylinder. In addition to lubrication, fit clearance, parts manufacturing quality, improper use may also cause the diesel generator set pull cylinder failure, specifically there are the following points:

1. The clearance between the piston and the cylinder liner is too small, or it has not been well run in before the formal work with load.

2. Poor lubrication, such as small clearance, thin oil or no oil in the assembly.

3. Diesel engine overheats.