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汽缸套脉冲试验是风冷柴油机结构可靠性的组成部份,是批量生产中抽检的重要内容,缸套能否投产必须通过破裂试验和脉冲试验。破裂试验方法用静载加压较易实现,而脉冲试验由于设备条件的限制很难达到试验要求的技术条件。随着液压、电子及其计算机技术的发展,一种新颖的结构疲劳试验系统,电液伺服试验系统已开始应用于发动机结构件的疲劳试验,缸套脉冲试验是应用该系统的压力控制部份。但是单有试验设备而无试验规范包括试验数量、载荷大小、试验数据处理等是无法进行寿命评定的,是进行寿命试验前急待解决的重大课题。 本文以缸套试验为背景,较详细地介绍了用电液伺服压力控制系统对缸套进行脉冲试验的原理、方法及试验装置,粗略地介绍了用统计分布函数处理试验数据的基本方法。 一、缸套脉冲试验的要求
Cylinder liner pulse test is an integral part of the structural reliability of the air-cooled diesel engine. It is an important part of sampling in batch production. Whether the liner can be put into operation must pass the burst test and the pulse test. Fracture test method is easier to achieve with static load, and pulse test due to equipment limitations is difficult to achieve the technical requirements of the test. With the development of hydraulic, electronic and computer technology, a novel structural fatigue test system, electro-hydraulic servo test system has begun to be applied to the fatigue test of engine structural parts, and the cylinder liner pulse test is applied to the pressure control part of the system . However, the only test equipment without test specifications, including the number of tests, load size, test data processing is unable to assess the life expectancy, life-long test is an important issue to be solved. In this paper, based on the cylinder liner test, the principle, method and experimental device for testing the cylinder liner with the electro-hydraulic servo pressure control system are introduced in detail. The basic methods for processing the test data with the statistical distribution function are introduced. First, the requirements of cylinder pulse test