The cause and solution to put the high-pressure pipeline leak diesel generator
DATE：2019/6/24 14:26:20 HITS：685
Tubing joints cracking or fracture leakage, generally are diesel engine I VI two-cylinder high-pressure tubing than other cylinder is easily broken. In addition to the tubing itself the quality of, missing equipment maintenance and demolition of the school when the fuel injection pump, fixed high pressure tubing pipe clamps, or installed in the appropriate position.
High pressure tubing connected to a part of the oil spill may be connected by high-pressure tubing, fuel injectors, fuel pump seal cone Mifengbuyan caused. By check, the exclusion of the fuel pump, injector oil spill reasons then check the high pressure tubing finished cold heading cone meets the requirements of the drawings, the size of the curved or without error. Plus the the installation stress caused by the high pressure tubing curved errors due to vibration of the high pressure tubing, both may aggravate the sealing cone Mifengbuyan.
To ensure that the requirements of the sealing cone shape, dimensional accuracy, it is recommended that in the high pressure tubing connected before the the head cold upsetting molding, tubing bent to increase the tapered surface of a finishing grinding process, by grinding, to ensure the accuracy of the cone size and shape generally each high pressure tubing should grinding 0.02 ~ 0.05mm, in order to form a complete and accurate cone, the individual to be ground than 1.0mm. Also put in cold heading forming protective sleeve storage parts bumps could solve the problem.
For diesel generator repair
Quite a long time without new pipe to be replaced with high pressure tubing cone with cone pad 1 ~ 2cm, about 5mm in diameter plastic pipe, or pad inside diameter slightly larger than the tubing inner diameter and the outer diameter of the copper washers. Such as the Sl95 type diesel engines, high pressure tubing rupture occurred at one end connected to the fuel injection pump, cracks appear in the the excessive arc at the ball head and tubing outside diameter of the pipe end contact. The reason, first, the torque does not meet the requirements (high pressure tubing nut torque should be controlled in 40 ~ 6ON ? m) torque is too large fragile thread, and tubing deformation; too small, the the sealing cones at easy leakage. Nut to preload, tubing joints diesel, leakage, you should remove the tubing and check for dirt ball head with suction pump or injector contact cone, if any, clear Tighten and then press the specified torque. Incorrect installation location, high pressure tubing at both ends of the injector body and out the valve the tight seat installation position is not correct, the distortion caused by the high pressure tubing, when mandatory at both ends of the nut, tighten the tubing will damage the tubing and oil spills.
