Piston ring wire rod and piston ring winding die

Abstract

The invention relates to a piston ring wire rod and a piston ring winding mould, the piston ring wire rod has a rectangular basic cross section, the basic cross section has a first side and a second side which are parallel to each other and a third side and a fourth side which are parallel to each other, and the piston ring wire rod is characterized in that the first side is provided with a groove which is concave relative to the first side; a first edge and a second edge are arranged at the two ends of the second edge respectively, the projection width of the first edge and the projection width of the second edge are both in the range of 0.2 W-0. 6 W, W is the width of the foundation section, a protruding part is arranged at the bottom of a guide groove in the circumferential face of the piston ring manufacturing mold, the height Hs of the protruding part is equal to Hn + (0.1-0.3) mm, and the width of the first edge is smaller than that of the second edge. And Hn is the depth of the wire rod groove. The piston ring wire rod effectively optimizes the sealing performance of the piston ring.

Description

technical field [0001] The invention relates to the technical field of piston ring production, in particular to a piston ring wire material and a piston ring mold. Background technique [0002] The piston ring is an important sealing part in the composition of the internal combustion engine. It forms a dynamic sealing pair that moves relatively with the cylinder wall in the cylinder, preventing the gas in the cylinder from escaping through the gap between the sealing ring and the cylinder liner during operation. The sealing performance of the piston ring directly affects the cylinder pressure of the engine, and then affects the power performance of the engine; on the other hand, the relative sliding between the piston ring and the cylinder wall, and the friction loss are also important factors affecting the engine power. Therefore, on the one hand, the piston ring is required to be in close contact with the cylinder liner and has good sealing performance; The requirements f...

AI Technical Summary

Problems solved by technology

[0003] The authorized notification number is CN110291313B, which is called the piston ring with suppressed shaking, which discloses a piston ring with a notch on the side. The outward expansion of the piston ring strongly presses the piston ring against the cylinder wall to realize the functions of suppressing shaking and improving sealing. It is more complicated. The notch is used to control the gas entering the gap between the piston ring and the piston. The design and manufacture of the notch have higher requirements, and precise design calculation and control of manufacturing accuracy are required.

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