Gas valve pneumatic rotary device of high-power and intermediate and low-speed diesel engine

Abstract

The invention discloses a gas valve pneumatic rotary device of a high-power and intermediate and low-speed diesel engine. The gas valve pneumatic rotary device comprises a shell, a swivel, a support spring, a thrust bearing, a cover plate, a high-pressure gas pipe and a pneumatic reducing valve; the swivel is embedded in an upper stepped hole of a stepped through hole; the lower side of the swivelis supported on the thrust bearing through a spring seat and the support spring sequentially; the top end of a gas valve is supported in a taper hole in the center of the swivel through a taper clip;the lower side of the shell is supported on an air cylinder cover through a gas valve spring; the cover plate is fixed to the top end of the shell; a plurality of radially distributed blades are uniformly distributed in the middle of the axial direction of the swivel; and the high-pressure gas pipe is connected with a blowing through hole in the upper end of the shell. The gas valve pneumatic rotary device improves the gas impermeability between the gas valve and a valve seat to enable the output power of the diesel engine to keep unchanged, removes carbon deposition between the valve rod andthe guide pipe of the gas valve to ensure that the gas valve operates smoothly, enables the valve disk of the gas valve to be uniformly heated and to be unlikely to be damaged, improves the working reliability of the diesel engine and prolongs the service life of the diesel engine.

Description

technical field [0001] The invention relates to a gas distribution device for a diesel engine, in particular to a diesel engine gas valve rotating device driven by high-pressure air flow, and belongs to the technical field of internal combustion engines. Background technique [0002] High-power medium-low speed diesel engine refers to a diesel engine with a cylinder diameter greater than 150mm, a speed of 300-1100rpm, and a single-cylinder power ≥ 85kW. Its valve camshaft lift is ≥ 10mm, which has strong power and can use light / heavy diesel oil. Low cost of use It is a power machine widely used in important industrial fields such as mining machinery, ships, and nuclear power plants. The diesel engine uses light / heavy diesel oil for a long time, and the conical surface of the valve disc at the lower part of the valve and the contact surface of the valve seat in the cylinder head are easy to form carbon deposits, resulting in insufficient bonding of the two, resulting in a dec...

AI Technical Summary

Problems solved by technology

The diesel engine uses light / heavy diesel oil for a long time, and the conical surface of the valve disc at the lower part of the valve and the contact surface of the valve seat in the cylinder head are easy to form carbon deposits, which leads to insufficient bonding of the two, resulting in a decrease in the output power of the diesel engine

And the valve disc is easily damaged due to uneven heating

In addition, carbon deposits will also form between the valve stem on the upper part of the air valve and its matching conduit, which will cause the valve stem to be stuck and shorten the service life of the diesel engine.

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