CN2295852Y

CN2295852Y - Wear-resistant piston ring

Info

Publication number: CN2295852Y
Application number: CN 96215768
Authority: CN
Inventors: 金之垣; 孔宪清; 王辉; 马绍川; 邹彦文
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-07-24
Filing date: 1996-07-24
Publication date: 1998-10-28
Anticipated expiration: 2006-07-24

Abstract

The utility model provides a wear-resistant piston ring. The utility model has the structure that a ceramic film layer is coated on the surface substrate layer, such as chromium coating, sprayed molybdenum layer, nitrid layer, phosphate coating, etc. of the piston ring body, or the ceramic film layer is coated directly on the piston ring body. The utility model has the advantages that the wear-resistant piston ring is more abrasion-resistant, the service life is long, the operation is convenient, and the manufacture cost is low.

Description

Wear-resistant piston ring

The utility model relates to the piston ring that internal-combustion engine is used, and relates in particular to the piston ring that is coated with wearing course.

Piston ring is one of crucial quick-wear part that directly influences engine performance and working life.In order to improve its wear resistance, reliability and tension cylinder, first compression ring adopts physics such as chromium plating, sprayed molybdenum, nitrogenize, phosphatization, chemical treatment method usually and obtains the layer of surface base layer.But the wear resistance of this class piston ring is still unsatisfactory, especially homemade piston ring, because aspects such as material and processing technologys, its antiwear property only reaches 80% of external like product, even lower.

No. 95220273.5 Chinese utility model patent discloses a kind of " superhard film piston ring ", its body surface is coated with the thin ti interlayer of one deck, on this transition layer, be coated with one deck superhard film coating again, it is titanium nitride (TiN), titanium carbide (TiC), titanium carbonitride, or contain the single or multiple lift composite bed of metallic additions such as aluminium, zirconium, hafnium, promptly appearance is coated with one deck ceramic film.The effect of ti interlayer is the combination force of strengthening between ceramic film and the piston ring body.This " superhard film piston ring " compares with aforementioned existing piston ring, and its antiwear property truly has raising.But this piston ring still has its worth improvements, on the one hand, because ceramic film is to be plated on the thin and not wear-resistant ti interlayer, after ceramic film was worn, just directly the not wear-resistant titanium of mill was crossed coating, then grind softer piston ring body, thereby influenced the life-span of piston ring; On the other hand, existing piston ring finished product had all carried out physics, chemical method surface treatments such as chromium plating, sprayed molybdenum, nitrogenize or phosphatization, thereby can not plate a titanium on piston ring body according to the scheme of this patent and cross coating, had plated ceramic film thereon again.And, the applicant after deliberation and the test, existing way is saved ti interlayer and is made the surface ceramic thin layer combine very firmly with piston ring body or the various surface matrix layers on it.

The purpose of this utility model is, the wear resistance of the existing piston ring that has various surface matrix layers such as chromium coating, sprayed molybdenum layer, nitride layer, phosphating coating is improved, and further improves its working life.

The purpose of this utility model is that also the piston ring structure that ceramic film is plated on aforementioned existing surface improves, and makes it more suitable.

At first goal of the invention, the utility model provides a kind of wear-resistant piston ring, the surface matrix layer (2) that there are chromium layer, molybdenum layer, nitride layer, phosphating coating in its body (1) surface or obtain through other physics, chemical method, it is characterized in that, go up coated with ceramic film layer (3) at said surface matrix layer (2).

At second goal of the invention, the utility model provides a kind of wear-resistant piston ring, and its ceramic film (3) directly is plated on the body (1).

More than said ceramic film (3) can be the single or multiple lift composite bed that pottery constituted by nitride, carbide, carboritride or the oxide of titanium, aluminium, zirconium, chromium etc.

First kind of wear-resistant piston ring that the utility model provides, owing to be on the wear-resistant surface base layer of existing piston ring, to have plated ceramic film again, therefore more wear-resisting, also more suitable.Directly plate second kind of piston ring of ceramic film on body, compare with aforementioned existing " superhard film piston ring ", its structure is simpler, and wear resistance is equal or higher.

Describe several preferred embodiments of the present utility model below in conjunction with accompanying drawing, each accompanying drawing is:

Fig. 1--the sectional elevation of first embodiment's piston ring;

Fig. 2--the sectional elevation of second embodiment's piston ring;

Fig. 3--the sectional elevation of the 3rd embodiment's piston ring;

Fig. 4--the sectional elevation of the 4th embodiment's piston ring;

Fig. 5--the wear-resistant effect schematic representation of piston ring ends face portion ceramic film shown in Figure 2;

The wear-resistant effect schematic representation of the end face part ceramic film of Fig. 6--piston ring shown in Figure 4.

Among each figure: the 1--piston ring body

2--surface matrix layer

The 3--ceramic film

The 4--cylinder wall

The ceramic film of piston ring shown in Figure 1 (3) is plated on the periphery of surface matrix layer (2), the ceramic film of piston ring shown in Figure 2 (3) is plated on the periphery of surface matrix layer (2) and the part adjacent with periphery on body (1) both ends of the surface, the ceramic film of piston ring shown in Figure 3 (3) directly is plated on the periphery of body (1), and the ceramic film of piston ring shown in Figure 4 directly is plated on the periphery of body (1) and the part adjacent with periphery on body (1) both ends of the surface.The ceramic membrane layer thickness is 0.5-2.5 μ m among each embodiment.

Fig. 5 and Fig. 6 are respectively the wear-resistant effect schematic representation of the ceramic film on Fig. 2, the piston ring end face shown in Figure 4.As shown in Figure 5; when on the piston ring excircle face surface matrix layer ceramic film grind off after; the ceramic film (3) that encircles on the upper and lower end face surface matrix layer still exists; they are sandwiched in the surface matrix layer (2) on the piston ring excircle face therebetween; the three bears jointly and cylinder wall (4) between friction; ceramic film on the upper and lower end face (3) plays wear-resistant protective action as eaves to therebetween surface matrix layer (2), can be referred to as " eaves protective effect ".In like manner, the ceramic film (3) that remains on the upper and lower end face of the piston ring body among Fig. 6 (1) plays " eaves protective effect " to therebetween piston ring body (1).

Claims

1, the surface matrix layer (2) that a kind of wear-resistant piston ring, its body (1) surface have chromium layer, molybdenum layer, nitride layer, phosphating coating or obtain through other physics, chemical method is characterized in that, goes up coated with ceramic film layer (3) at said surface matrix layer (2).

2, wear-resistant piston ring as claimed in claim 1 is characterized in that, said ceramic film (3) is plated on the periphery of surface matrix layer (2).

3, wear-resistant piston ring as claimed in claim 1 is characterized in that, said ceramic film (3) is plated on the periphery of surface matrix layer (2) and the part adjacent with periphery on body (1) both ends of the surface.

4, a kind of wear-resistant piston ring is characterized in that said ceramic film (3) directly is plated on the body (1).

5, wear-resistant piston ring as claimed in claim 4 is characterized in that, said ceramic film (3) directly is plated on the periphery of body (1)

6, wear-resistant piston ring as claimed in claim 4 is characterized in that, said ceramic film (3) directly is plated on the periphery of body (1) and the part adjacent with periphery on body (1) both ends of the surface.

7, as any described wear-resistant piston ring in the claim 1 to 6, it is characterized in that said ceramic film (3) is the single or multiple lift composite bed that pottery constituted by nitride, carbide, carboritride or the oxide of titanium, aluminium, zirconium, hafnium etc.

8, as any described wear-resistant piston ring in the claim 1 to 6, the thickness that it is characterized in that said ceramic film (3) is 0.5-2.5 μ m.

9, wear-resistant piston ring as claimed in claim 7 is characterized in that, the thickness of said ceramic film (3) is 0.5-2.5 μ m.