What is the use of black high pressure hose? The black high-pressure hose structure is mainly composed of an inner rubber layer, a middle rubber layer, a four-layer or multi-layer alternately wound steel wire reinforcement layer and an outer rubber layer. The inner rubber layer has the effect of making the conveying medium withstand pressure and protecting the steel wire from erosion, the outer rubber layer protects the steel wire from damage, and the steel wire (Phi 0.3-2.0 reinforcement layer) layer is the skeleton material to enhance the effect.
Correct installation: To solve the oil leakage of the black high pressure hose, in addition to the quality of the black high pressure hose, it should be correctly assembled, and the pipe clamp should be installed in the correct position. Reasonable installation steps are: first used to screw on the two ends of the fastening nut on a few rings (do not tighten for the time being) and then tighten the fuel injector pressure plate bolt, determine the installation position of the fuel injector, gently tap the black high pressure hose with a wooden hammer, and then use a torque wrench to alternately tighten the fastening nut at both ends several times (torque is 40~6ON? m). If the injector assembly is not installed properly, and the center line inclination of the joint cavity and the horn head is too large, a large external stress will be generated after tightening the nut, resulting in damage to the black high-pressure hose joint. Reduce the resonance: the black high pressure hose has a large span, and the opening and closing of the injector needle valve when the diesel engine is working will cause the black high pressure hose to produce strong high-frequency vibration, which is one of the important reasons for the damage of the black high pressure hose. To this end, the middle of the black high pressure hose can be fixed on the adjacent bolts and other fixings to reduce resonance. Reasonable adjustment: the injection pressure of the injector meets the requirements of the instruction manual, and the stainless steel metal hose prevents the injection pressure from being too high and causing the black high pressure hose to break. When adjusting the oil supply advance Angle, do not force and push the black high pressure hose. Emergency treatment: If there is leakage in the black high-pressure rubber hose joint, you can use a soft metal sheet or plastic sheet cut into a small circle, pad in the joint cavity, and then press the horn head, you can also use a fuse, cotton thread along the tightening direction to wrap several laps at the shoulder, and then tighten the nut of the joint; If necessary, the nut seat can be coated with soap or on the pad chewed into a paste of bubble gum, maltose, etc.
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