制动闸

Based on gas dynamics,a mathematical model for the air brake system of train is established.

根据气体动力学原理建立了列车空气制动系统的数学模型，预测了制动系统紧急制动作用；陆界长度与机车大闸排气口面积、列车管定压及列车长度的关系。

When power is transmitted to the elevator shaft, it drives the splined center wheel and the planetary mechanism which consists of three planetary wheels forming 120 degrees with each other and the inner gears drives the drum to rotate, the hoisting band brake is combined with the hoisting disc, and the drum's left ring is combined with the braking band brake, then the elevator has three status: hoisting, braking, and lowering down.

当动力传至升降机轴后，轴带动与花键联接的中心轮，三个互成120度的行心轮及内齿圈组成的行星机构，使卷筒回转，提升抱闸与提升盘结合，卷筒左端外圈与制动抱闸结合，这样升降机具有提升、制动、下降三种工作状态。

Railway ; brake shoe ; material ; feature ; development

铁路；制动闸瓦；材料；特性；发展

The working reliability of disk brake system is analyzed,through which the main factors influencing the reliability and the main causes of malfunction of the brake are discussed.

通过分析盘式闸制动系统的工作可靠性，据此讨论影响制动器工作可靠性的主要因素及制动失效的原因。

This article advances a new method through analyzing the braking system of the mine hoist and the available testing methods of parameters. This method can be used to test the parameters of braking system by means of turning off power, applying the brake, detecting the distance and the hodograph of run after it, and basing on the effect of applying the brake. The parameters can be tested and displayed by using the system consisting of PC and TMS320F240 DSP produced by TI company.

本文通过对提升机闸控系统及其现有闸控参数检测方法的分析，提出了一种在提升机低速运行时，通过切断电源、施加制动闸，检测施闸后的行程和速度图，依据提升机制动效果，测试出提升机闸控系统参数的方法，并采用TI公司生产的TMS320F240 DSP和PC机组成的两级计算机系统来实现参数的检测和显示。

At first, the article introduces the method to test the equivalent mass, the static moment of resistance, and the braking deceleration of the brake system and to examine the speed and the force of the hoisting system. According to the detecting method that the author put forwards, the parameters such as the brake torque, the time of idle motion, the brake distance and so on can be obtained.

文章首先介绍了提升机闸控系统的变位质量、静阻力矩、制动减速度以及提升系统的运行速度、拖动力的测试方法，然后依据作者提出的检测方法，得到闸控系统的制动力矩、空动时间和制动运行距离等参数。

The key point of the structure of the utility model is that: the other side of the reducer that is arranged on the platform is provided with a hoisting device; the roller shaft end of the electronic controlled windlass is provided with a hub, a damper brake is arranged outside the hub; the input castellated shaft of the reducer that is arranged on the electronic windlass is provided with duplicate gears that have different amount of teeth.

本实用新型包括标准节，两侧标准节的中间为平台，电控卷扬机的卷绳通过平台上的滑轮同吊盘相连；平台上的减速器的一侧设置有可提升平台的具有卷绳的滚筒，平台上设置有具有滑轮的支架，其结构要点平台上的减速器的另一侧设置有提升装置；电控卷扬机的滚筒轴端设置有轮毂，轮毂外设置有制动闸；电控卷扬机的减速器的输入花键轴上设置具有不同齿数的双连齿轮，双连齿轮之间的凹槽内的拨杆同减速器外的摇把相连。

The paper analyses the effect of brake resistance of discal brake stop system,stain of brake_plate and the rellability of hydraulic station on elevator's safety running by abundantly spot testing.

通过大量的现场测试，分析了盘式闸制动系统的制动器阻力、闸盘污染以及液压站的可靠性对提升机安全运行的影响，提出了改造意

Later designs reduced the rigging, so that each bogie had a cylinder or, on modern trains, each wheel or even each block had its own brake cylinder.

之后的设计减少了制动连杆，每一个转向架只有一个制动缸，对于现代化的列车，每一个车轮，甚至每一块闸瓦都有自己的制动缸。

According to the structure characteristics of L-B composite brake beam, the finite element model of L-B brake beam based on contact is established, and the stress distribution of the brake beam in different conditions calculated is using I-DEAS software. Calculated results show that the stress concentration mainly generates in the root of brake header slider, which fit with the faults in actual operation, and provide reliable basis to improve design and optimization.

根据L-B型组合式制动梁的结构特点，运用I-DEAS软件建立基于接触的L-B型制动梁有限元模型，并计算了制动梁在不同工况下的应力分布，计算结果表明应力集中主要发生在闸瓦托滑块根部，这与实际运行中出现的故障较为吻合，为制动梁的改进设计和结构优化提供了依据。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了