Double-edge positive distortion oil ring assembly

Abstract

According to the double-edge positive distortion oil ring assembly, the radial thickness of the upper oil edge is set to be larger than that of the lower oil edge, the distance between the central axis of the supporting spring and the upper surface of the oil ring is larger than that between the central axis of the supporting spring and the lower surface of the oil ring, and the scheme is further optimized, so that the distortion stress state of the oil ring is greatly improved; therefore, the oil ring can be well ensured to generate positive distortion, the contact surface of the lower oil scraping blade is greatly pressed, and the oil scraping effect is greatly improved; and oil sealing is further facilitated, the risk that engine oil flows upwards is reduced, and engine oil consumption is reduced.

Description

technical field [0001] The application belongs to the field of automobile engine accessories, and in particular relates to a double-edged positively twisted oil ring assembly. Background technique [0002] High explosion pressure and high power will be one of the main features of the next-generation engine technology upgrade, and high explosion pressure and power will put forward more stringent requirements for engine durability. As one of the core components of the engine, the engine piston ring will face the challenge of higher durability and reliability requirements. [0003] Figure 1(a) is a cross-sectional view of an existing integrated double-edged oil ring. It can be seen that the upper oil scraper and the lower oil scraper are equidistant in the radial thickness direction. Due to the deformation of the cylinder liner during the operation of the engine, the oil ring will be affected by the deformation of the cylinder liner when it is attached to the cylinder liner, r...

AI Technical Summary

Problems solved by technology

Due to the deformation of the cylinder liner during the operation of the engine, the oil ring will be affected by the deformation of the cylinder liner when it is attached to the cylinder liner, resulting in an uncontrollable inclination during the movement. In this case, the oil scraping blade effect will be affected

And the upper side of the two-piece oil ring and the upper side of the ring groove are designed in parallel, affected by the deformation of the ring groove and the movement deformation of the ring, the fit between the ring and the ring groove will be affected, and the distance between the ring and the ring groove will be affected. Side seals are also affected

[0004] As an improvement, an improved double-edged oil ring is proposed in the prior art. As shown in Figure 1(b), the unequal radial thickness of the upper and lower oil scraping blades produces unequal surface pressure and twists the oil ring. In actual operating conditions, due to the rigidity of the oil ring and the good lubrication of the cylinder liner, under normal circumstances, the friction between the oil blade and the cylinder liner is not enough to achieve the torsion of the single-piece double-edged ring. The process of designing the radial thickness difference Δr of the two oil blades is complex and cumbersome, and the radial thickness difference Δr of the oil blades is unreasonable, which will cause only one oil blade to work. Therefore, this method of simply changing the radial height of the oil blades setting, the oil scraping effect will be greatly reduced because the torsion effect cannot meet expectations

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