广州南沙滨海景观带上卧式闸门结构设计

目前城市防洪排涝工程建设越来越重视景观协调性,传统平面直升闸门已无法满足广州南沙滨海景观带建设的要求,万顷沙挡潮闸推荐上卧式闸门,采用液压启闭机起吊,该类型闸门地面以上无高耸建筑,做到建闸于无形。通过受力系统简化,对面板、主梁进行了计算。将闸门简化为平面问题,采用静力学方法对不同水位组合情况下的启闭力进行计算,为启闭机容量选择提供依据。同时通过受力平衡分析,计算得到了中铰的支座反力,从而为中铰牛腿的结构计算提供荷载要求。     

Hoist for Greenhouse Soil Bed Sterilizing Pans

A light weight, extendable and moveable hoist has been developed to move a greenhouse soil sterilizing pan. Its use has resulted in a reduction of 75 % of the manpower required to displace the pan, elimination of possible back injury to workers when lifting the pan and preclusion of the immediate introduction of pathogens into the sterilized sections of the soil bed.     

Power Model of Bond Graph and Dynamic Simulation of Hoist System for Multi-Flow Transmission

The double drive hoist reducer developed in the planetary gear is a new generation of energy saving and environment protecting hoist product. The multi flow transmission system theory of hoist is analyzed. With the theory and method of bond graph,a bond graph model with coupled vibration is established for hoist multi flow transmission system for the first time. The state equation of the system is developed and dynamic simulation analysis is also carried out. The internal changing law and relationship of the system for the state variable are got. Therefore, the dynamic properties and gearing features of this system are revealed comprehensively. The research results can provide the dynamic analysis method and design basis for multi flow transmission system of hoist.