The protective system of overhead type cranes with magnetorheological buffers

Abstract

The analysis of the operation existing protective systems of overhead type cranes in the
dead-ends of crane runway is shown that existing protective systems don’t provide safety operation
of the hoist cranes especially during emergency situations (crane running into the end stops). It also
by aspiration of scientists for creating new constructions of buffers that will satisfy requirements of
operating cranes rules and differ with increasing dependability of operation is confirmed.
The requirements to the buffers as a result of analysis of last suggested design of buffers
were formulated and the new design of buffer with magnetorheological work liquid is suggested.
The mathematical model that describes system with one DOF damping by the buffer with
rheological liquid is given. It allows in future to develop a mathematical model that will describe
overhead type crane with magnetorheological buffers running into the end stops. It helps to do
theoretical research of this process and establish the regularity of magnetorheological buffers
operation for the purpose of developing of the prototype for conducting experimental research.