Oil sprayer with effective oil dripping prevention function

Abstract

The invention discloses an oil sprayer with an effective oil dripping prevention function. The oil sprayer comprises an oil sprayer body, a needle valve, a needle valve body, an anti-impact protective sleeve of the needle valve body, an abrasion-resistant plating layer of the needle valve, an abrasion-resistant hole ring of the needle valve, and a self-cleaning protecting layer of the needle valve, wherein the lower part of the oil sprayer body is respectively provided with the needle valve and the needle valve body, the exterior of the needle valve body is provided with the anti-impact protective sleeve of the needle valve body, the needle valve is plated with the abrasion-resistant plating layer of the needle valve, the abrasion-resistant hole ring of the needle valve is arranged in a needle valve hole of the needle valve, and the self-cleaning protecting layer of the needle valve is also arranged in the needle valve hole. By adopting the method, the oil sprayer has the advantages that the sealing performance of a sealing conical surface of the needle valve body is good, the oil dripping of the oil sprayer is avoided, the abrasion-resistant property for the abrasion between the needle valve and a guide surface of the needle valve hole is better, and the internal leakage of the oil sprayer is effectively avoided.

Description

technical field [0001] The invention relates to the field of fuel injectors, in particular to a fuel injector capable of effectively preventing oil dripping. Background technique [0002] In the fuel injection system of a diesel engine, the fuel is atomized and distributed in the combustion chamber to mix with air. It is mainly composed of injector nozzle and injector body. Its mounting position and angle on the cylinder head depend on the design of the combustion chamber. The spray characteristics of the injector include atomization particle size, oil mist distribution, oil beam direction, range and diffusion cone angle, etc. These characteristics should meet the requirements of the diesel engine combustion system, so that the mixture can be formed and burned perfectly, and a higher efficiency can be obtained. In terms of power and thermal efficiency, fuel injectors are divided into open and closed. Open injectors have a simple structure, but poor atomization, and are rar...

AI Technical Summary

Problems solved by technology

[0003] However, the fuel injectors currently in use are prone to dripping at the end of the fuel injection. When the fuel injector is working, the sealing cone of the needle valve body will be frequently and strongly impacted by the needle valve. Injection out of the place, the cone surface will gradually appear nicks or spots, thus losing the seal, causing the injector to drip oil

In addition, the needle valve and the guide surface of the needle valve hole are worn, the needle valve reciprocates frequently in the needle valve hole, and the intrusion of impurities and dirt in the diesel oil will gradually wear the guide surface of the needle valve hole, thus increasing the gap or causing strain Scratches, resulting in increased internal leakage of the fuel injector, reduced pressure, reduced fuel injection volume, delayed fuel injection time, and difficulty in starting the diesel engine