Sealing structure of diesel low-voltage fuel metal oil conduit and mounting method thereof

Abstract

The invention discloses a sealing structure for a low pressure fuel metal oil pipe of a diesel engine and installation method thereof, the sealing structure comprises a pipe nut, a joint and a sealing rubber sleeve, wherein the pipe nut is installed on the low pressure fuel metal oil pipe of a diesel engine, the joint is arranged at the end part of the metal oil pipe, the pipe nut and the joint form a sealing cavity on the outer wall of the metal oil pipe, the sealing rubber sleeved is arranged in the sealing cavity. A lining is arranged between the outer wall of the metal oil pipe and the inner hole wall of the joint. The sealing structure for the low pressure fuel metal oil pipe of the diesel engine has the characteristics of good manufacturability and good sealing effect, simple assembly, good appearance quality, strong high-low temperature resistance and vibration dumping function and high reliability, is applicable in the diesel engine, especially the diesel engine for vehicles.

Description

technical field [0001] The invention relates to a sealing structure of a low-pressure fuel metal oil pipe of a diesel engine, in particular to a sealing structure of a low-pressure fuel pipeline of a medium- and heavy-duty road or non-road diesel engine. Background technique [0002] At present, metal pipes, rubber pipes or nylon pipes are generally used in the low-pressure fuel pipelines of diesel engines, and the seals of the connecting parts are widely used in the structure of hinged pipe joints, sealing gaskets and hinged bolts, or spherical screw-in pipe joints Spherical, conical sealing structure. With the increasingly stringent requirements on the appearance quality and safety performance of diesel engines, metal pipes and oil pipes with the above-mentioned sealing structure are easy to break during engine use because they do not have the function of damping vibration, and there are potential safety hazards; rubber or nylon pipes with the above-mentioned sealing struc...

AI Technical Summary

Problems solved by technology

With the increasingly stringent requirements on the appearance quality and safety performance of diesel engines, metal pipes and oil pipes with the above-mentioned sealing structure are easy to break during engine use because they do not have the function of damping vibration, and there are potential safety hazards; rubber or nylon pipes with the above-mentioned sealing structure Because the oil pipe does not have the function of anti-high temperature environment, it is easy to age and break during the use of the engine, and there are also potential safety hazards; that is to say, it is difficult to take into account the forming design with vibration damping function and adapt to high temperature environment work with the oil pipe with the current sealed structure

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