液压电梯起动平稳性及其非线性补偿控制的研究

本文从液压电梯数学模型及电梯中的非线性环节出发，分析液压电梯起动时易产生抖动的原因，并提出利用新的非线性补偿系统中非线性的控制策略，以消除系统中非线性环节对液压电梯起动平稳性的不利影响。实验证明，本文提出的控制算法具有算法简单、控制效果优等特点。

鱼糜脱水机平稳起动控制装置

鱼糜脱水机在起动时,常常发生电动机抱死或脱水桶单边跳跃的现象,在造成安全隐患的同时,使起动次数增加,机件早期磨损严重。针对这些问题,运用偏心机构原理,结合棘轮的定向、定位作用,设计了一种使鱼糜脱水机平稳起动,在推杆运行的某一阶段增加其摩擦力的装置。通过附加这一装置,达到提高脱水机安全性、平稳性和延长使用寿命的目的。

烧结主抽同步电动机励磁装置的设计与应用

介绍了安钢两大烧结机工程主抽风机同步电动机励磁控制系统的设计和应用情况。从生产实践的角度说明KGLF-2C型励磁装置性能稳定,运行可靠,具有广泛的应用前景和推广价值。

烧结主抽风机自动控制系统的设计与应用

介绍了安钢烧结机主抽风机同步电动机自动控制系统的设计和应用情况。根据各项技术参数表明所采用的液阻起动方式、KGLF-2C型励磁装置和采用PLC自动控制系统性能稳定,运行可靠,具有广泛的应用前景和推广价值。

Mechanism of hydro-viscous soft start of belt conveyor

The mechanism of a hydro-viscous soft start is of great importance in the design of a hydro-viscous clutch and its control system. To explain the mechanism of a hydro-viscous soft start, the startup process of a belt conveyor was numerically analyzed with the modified Reynolds equation, an energy equation and a temperature-viscosity equation. The effect of temperature and grooves of the friction disk surface on torque transfer and load capacity of the oil film have also been analyzed. The results show that 1) the grooves are the basis of forming dynamic pressure but they may reduce the capacity of torque transfer to a certain extent, 2) during the startup process, temperature has little effect on torque transfer and load capacity and the variation in load capacity of the oil film is very small, indicating that it is preferable to use the flow rate as a control object than the pressure of the feed cylinder. The results have been verified by an experiment.

自己动手保养汽车

现在拥有轿车的家庭越来越多,日常保养显得更重要了。那么该怎样去做呢? 平时用车过程中,要记住勤换机油和机油滤清器。