起重机打滑验证

CRANE SLIPPINS CHECKING CALCULATION

起重机打滑验算公式很多。如有用牵引力、外阻力验算起动打滑的,也有用制动力、制动阻力验算制动打滑的。验算结果不尽一致。本文分析了各种验算方法和验算公式,对几种工况下,什么条件容易出现打滑现象进行了研究,推导出起动和制动打滑验算公式。并提出计算各力时应该考虑的问题,验算时什么条件是最不利因素,提出从外阻力方面进行验算打滑是符合实际的观点。

There are several formulae for checking calculation of slipping of crane (CCSC in short), such as based on traction force and external resistance, also based on brakeage and braking resistance. The results of CCSC are different. After analysing the methods and formulae of CCSC, the author presents a new formula of CCSC based on the conditions of both starting and braking. Finally the author points out that CCSC based on eternal force is more feasible than others for the practical operation of crane.