valve seat insert(valve seat ring)

The expert system of electrical upsetting process for valve based on artificial neural networks;

基于人工神经网络的气门电热镦粗工艺专家系统

Selection of the parameters of electrical upsetting process for valve based on artificial neural networks;

基于人工神经网络的气门电镦工艺参数的选择

Numerical simulation of electrical upsetting process for valve;

气门电热镦粗工艺的数值模拟

Starting from the valve structure relative to valve axial dimension, the structure, theory, adjusting method, operating method and characteristic for the special comparer which can be used for inspecting multiple axial parameters of engine valve in time are introduced in detail on the basis of the precondition of the unification between measuring benchmark and designing benchmark.

从与气门轴向尺寸有关的气门结构特点入手,介绍了有关在测量基准与设计基准统一的前提下可同时进行气门多个轴向尺寸测量的专用检具的结构原理、调节方法、使用方法等。

The finite_element software MAFAP was used to make simulation analysis on the finish_forging process of the engine valve.

运用有限元软件MAFAP ,对气门毛坯的终锻成形过程进行数值模拟分析 ,获得了金属在模具型腔内填充时的速度场、应变场分布以及模具受力等信息 ,并研究得到终锻成形的金属变形机理。

On the base of unsteady-state analysis,process of engine valve for extruding is simulated and studied by FEA software.

在非稳态分析的基础上,对2种不同尺寸的气门,运用有限元软件对其挤压成形过程进行数值模拟分析。

New process for small end surface of engine air valve;

发动机气门小端的新型加工方法

Experiment and analysis of laser fusion coating process for the cone of air valve in Model 240 engine of diesel locomotive;

240柴油机气门盘锥面激光熔覆的试验与分析

Focusing on the problems existed in testing leak for engine air valves with kerosene, a device for leak testing is developed with the feature of fluid mechanics and tightness so as to increase production efficiency, reduce cost and improve working environment.

针对柳州五菱汽车有限责任公司柳州机械厂以前用煤油进行发动机气门试漏存在的问题,利用流体力学和密封学的特点研制发动机气门试漏的装置,以提高生产效率和降低成本及改善工作环境等。

Chronometrical morphology changes of larval spiracle at different developmental stages of Parasarcophaga crassipalpis (Macquart) (Diptera:Sarcophagidae);

肥须亚麻蝇幼虫不同发育阶段气门形态学变化

Ultr astructure of the spiracle of Spodoptera exigu Hubner;

甜菜夜蛾幼虫气门的超微结构观察

According to the opening or closing spiracle, a typical discontinuous gas exchange cycle (DGC) has three distinct phases: the closed period with little or no external gas exchange, the flutter period during which oxygen enters tracheae and little CO (2) escapes and the open period during which lots of CO (2) escape.

根据气门开闭, 一个典型的不连续气体交换循环 (discontinuousgas exchange cycle, DGC) 可以明显分为3个阶段: 关闭阶段, 极少或没有气体交换; 颤动阶段, 气门迅速微开和关闭, O2进入气管, 少量CO2释放; 最后是开放阶段, 大量的CO2释放。

In the case of without exhause gas, the wear process of valve-valve base pairs conforms to the general laws, it is consists of three stages, i.

本文根据摩擦学原理,采用动态磨损模拟试验和表面微观分析的研究方法考察了冲击载荷、温度、燃烧气氛等磨损工况对气门-气门座摩擦磨损特性的影响,指出要改善气门-气门座的摩擦磨损特性,就必须提高材料表面层在高温下的力学性能和抗蠕变及抗腐蚀的能力。

In order to deeply comprehend the wear regularity of chilled alloy cast iron tappet, the influence of surface layer microstructure on wear resistance was studied.

为了深入了解冷激合金铸铁气门挺杆的磨损规律,研究了冷激合金铸铁气门挺杆表层组织对耐磨性的影响。