Apparatus for rapidly depositing DLC film on surface of piston ring, and method thereof

Abstract

The invention discloses an apparatus for rapidly depositing a DLC film on the surface of a piston ring, and a method thereof. The apparatus comprises: an ion injection system used for vertically uniformly injecting ion flow; a vacuum chamber, wherein one end of the vacuum chamber is in sealing connection with the ion injection system, the other end of the vacuum chamber is in sealing connection with one end of a broad-beam magnetic filtering deposition system, and the other end of the broad-beam magnetic filtering deposition system is provided with an FCVA deposition cathode; a tool system used for realizing autorotation of a piston ring tool cylinder; and an intelligent control device used for controlling the ion injection and film deposition process, displaying a measurement result and preliminarily processing data. The apparatus and the method can realize large-batch uniform plating of the surface of the piston ring with the DLC film with high hardness and low friction coefficient.

Description

Technical field [0001] The invention relates to the field of nuclear science and technology and application, in particular to a system for coating a DLC (high-performance diamond-like carbon) film on the surface of a piston ring. Background technique [0002] Under normal circumstances, due to the special working environment of the engine piston ring, it is required to have a low friction coefficient and high hardness. The existing piston ring coatings are mainly chromium nitride super-thick coatings, but the main disadvantage of such super-thick coatings is the relatively large coefficient of friction. [0003] As people pay more attention to the environment, higher requirements are put forward for piston ring combustion efficiency and heat conversion efficiency. Research has found that DLC film can well meet the current requirements of high hardness and low friction coefficient. The DLC film layer is deposited by chemical vapor deposition (CVD, Chemical Vapor Deposition) technol...

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Problems solved by technology

[0004] 1) The deposition rate of DLC film is relatively slow, and the relative time cost is relatively high for industrial production;

[0005] 2) The internal compressive stress of the DLC film is relatively large, and it is difficult to realize the preparation of an ultra-thick film. At the same time, the bonding force between the DLC film and the piston ring is relatively poor and cannot meet the requirements of actual industrial applications;

[0006] 3) The life of the existing piston ring is difficult to reach 3000 hours or more in the normal operation of the engine

[0007] Therefore, there is an urgent need to improve the film thickness and friction coefficient of the engine piston ring, but it is difficult to achieve it with existing equipment or technology.

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