Engine piston general fatigue test device

Abstract

The invention provides an engine piston general fatigue test device which comprises a bearing cylinder (1), a test piston (6), an adjustment cylinder sleeve (2), a bearing end cover (3), a piston seat (4) and a piston pin (5). The bearing cylinder (1) is provided with a stepped cylinder hole used for mounting the adjustment cylinder sleeve (2), and the stepped cylinder hole goes through the left and right sides. The outer circle of the adjustment cylinder sleeve (2) is a stepped structure and is matched with the cylinder hole of the bearing cylinder (1). Bolt holes used for connecting the bearing end cover (3) are uniformly distributed at two sides of the bearing cylinder (1). The periphery of the bearing end cover (3) is provided with a bolt hole which is connected with the bearing cylinder (1), and the middle of the bearing end cover (3) is provided with a bolt hole and a positioning counterbore which are connected with the piston seat (4). An electro-hydraulic servo system produces a pulsating load. A phase difference between high voltage and low voltage effects is 180 degrees. According to the device, a two-opposed-piston horizontal layout mode is employed, a simulation combustion chamber is shared by two pistons, the synchronous test of two pistons is ensured, and the test cycle and cost are greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of engine piston fatigue tests, and in particular relates to a general fatigue test device for engine pistons. Background technique [0002] As a component part of the engine combustion chamber, the piston is subjected to periodic action of high temperature and high pressure during operation, and its structural strength and fatigue reliability are very important. Especially the top of the piston and the bearing part of the piston pin hole due to overload, overspeed and abnormal working conditions, as well as the explosion pressure and speed increase after the engine is strengthened, the load on the piston is increased, and the piston ring land, pit, piston pin hole and other positions are cracked. . In addition, in the development stage of new products, the weak links of the fatigue strength of the piston structure are found in time, and the feasibility of the verification scheme is often verified by compon...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems existing in the existing piston fatigue test device, the present invention proposes a general fatigue test device for engine pistons, so as to achieve the purpose of synchronous testing of two pistons and greatly reduce the test period and cost

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