Scraper ring, three-combination piston oil ring and scraper ring preparation method

Abstract

The invention discloses a scraper ring, a three-combination piston oil ring and a scraper ring preparation method. The scraper ring comprises a scraper ring base body with the upper surface and the lower surface being parallel to each other. The annular inner side of the scraper ring base body extends to form an inner circular face arc, and the radius of the inner circular face arc is R1. The annular outer side of the scraper ring base body extends to form an outer circular face arc, the radius of the outer circular face arc is R2, and the arc width of the outer circular face arc is t1. The outer circular face arc is connected with the upper surface and the lower surface of the scraper ring base body through transition slopes, the length of the upper transition slope connected with the upper surface of the scraper ring base body is L1, and the length of the lower transition slope connected with the lower surface of the scraper ring base body is L2. R1 is equal to 0.7 H to 0.9 H, R2 isequal to 0.25 H to 0.4 H, t1 is equal to 0.6 R2 to 0.8 R2, L1 is equal to 0.45 H to 0.65 H, and L2 is equal to 0.3 H to 0.4 H, wherein H is the height of the scraper ring base body, and the value range of H is 0.3 mm to 0.5 mm.

Description

technical field [0001] The invention relates to the field of piston rings, in particular to a scraper ring, a three-combination piston oil ring and a preparation method for the scraper ring. Background technique [0002] The oil ring is the core oil control part of the engine, and its performance directly affects the oil consumption of the automobile engine. Because the three-combination oil ring has the characteristics of superior side sealing and thin design, it is more used, especially in high-speed engines such as gasoline engines and gas engines, and has become the mainstream design. [0003] The three-combination piston ring oil ring is composed of an upper and a lower pair of scraper rings and an intermediate lining ring. The intermediate lining ring provides outward tension to the scraper ring, so that the outer circle of the scraper ring and the cylinder wall always maintain a high degree of fit. When moving up and down, it has the function of scraping oil on the c...

AI Technical Summary

Problems solved by technology

With the increase of the explosion pressure of the automobile and the improvement of the friction requirements, this scraper ring has the following disadvantages: (1) Since the inner circular surface of the scraper ring and the ear of the lining ring have been in friction, the ear of the lining ring has been caused Excessive wear of the part, after the ear part of the lining ring is worn, the combined tension of the ring will decrease, which will affect the oil scraping effect; The contact zone between the circular surface and the cylinder wall is relatively wide. In order to ensure the contact surface pressure between the scraper ring and the cylinder wall, the tension of the oil ring must be increased, which increases the friction work loss of the engine, which is not conducive to improving the fuel consumption of the engine.

Patent CN211275935U discloses asymmetrical R-arc scraper piston ring wire. The inner circle of the scraper ring made of the wire in this patent is half a circular arc like the ordinary scraper ring. There is no solution to the scraper ring. For the ear wear problem of the lining ring, the improvement of the outer circular surface reduces the contact bandwidth between the scraper ring and the cylinder wall to a certain extent, and reduces the friction between the scraper and the cylinder liner, but there are still unfavorable factors. The outer surface and bottom of the ring have a symmetrical structure. When the scraper ring goes up in the cylinder liner, the oil storage space on the oil distribution side is small, and the oil distribution is insufficient, and the oil film thickness of the scraper ring on the cylinder wall is getting smaller Thin, resulting in poor lubrication between the ring and the cylinder wall, prone to dry friction, causing the outer circle of the scraper ring to wear quickly, and the service life of the scraper ring is poor. In addition, the engine noise caused by dry friction is large, which affects the safety of drivers and passengers. Comfort

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