Device and method for testing torsional stiffness of radial section of piston ring

Abstract

The invention specifically provides a testing apparatus for testing the torsional rigidity of the radial section of a piston ring, belonging to the field of power machinery. The testing apparatus comprises the piston ring, a base, a pressing body, a force sensor, a loading handle, a leveling swing rod, a plumb, a displacement measuring swing rod, a first displacement sensor and a second displacement sensor, wherein a groove is arranged on the base, and a central column is arranged at the center of the groove on the base; the loading handle, the force sensor and the pressing body are sequentially arranged on the central column from top to bottom; the piston ring is arranged between the side surface of the pressing body and the inner wall of the groove on the base; the circumferential section of the piston ring is perpendicular to the central column; the top of the base is provided with a connecting rod which is provided with the leveling swing rod and the displacement measuring swing rod; the first displacement sensor is installed between the displacement measurement swing rod and the upper surface of the pressing body; and the second displacement sensor is installed between the side surface of the pressing body and the inner wall of the groove on the base. According to the invention, the radial section deformation of the piston ring is taken into consideration, so the precisionof torque determination of the piston ring is high, and accurate torsional rigidity of the radial section of the piston ring can be obtained.

Description

technical field

[0001] The invention relates to a piston ring in the power field, in particular to a test device for the torsional stiffness of the radial section of the piston ring, and also relates to a test method for the torsional stiffness of the radial section of the piston ring. Background technique

[0002] The movement of the piston ring in the ring groove is very complicated, including axial reciprocation, circumferential rotation, and twisting around the circumferential section. Due to the difference in gas pressure between the adjacent ring grooves and lands of the piston ring, the cross section of the piston ring will be twisted and deformed, and then twisted stress will be generated. The torsional movement of the piston around the radial section will cause fatigue and damage to the piston ring, and also affect the air tightness of the piston ring, so the calculation and analysis of the torsional movement of the piston ring is very important. The torsional stif...

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