Identification and elimination of the causes of low-frequency vibrations of the floating floor plate of the engine room
The article discusses the issues of identifying the causes of low-frequency vibrations of the floating floor plate of the engine room of a residential building during the operation of elevator winches. Such an assessment is very important for the technological integrity and operability of elevator equipment, as well as for further evaluation of the propagation of sound vibrations through the structural elements of the building into residential premises. The authors measured vibrations on the floating floor plate of the engine room when working separately with cargo and passenger winches in two modes of operation. Noise measurements were made in the engine room and in the elevator lobby of the last residential floor. The analysis of the vibration measurement results is presented and the shape of the floating floor plate vibrations is established. Based on the analysis, measures aimed at reducing the high vibration levels of the floating floor plate in the starting mode of operation of the elevator winch, which are stops-limiters, are proposed and implemented, and an experimental evaluation of their effectiveness is performed.