Transverse Stiffness Analysis of the Shaft System in the Drive Mechanism of Mobile-Head Spiral Winding Equipment

Abstract

In the field of trenchless mechanical equipment, the mobile-head spiral winding device plays a vital role. Compared with other pipeline rehabilitation technologies, the mobile-head spiral winding repair technique offers high compressive strength, efficient construction, long-distance operation, and the capability for underwater installation. It is particularly suitable for the rehabilitation of large-diameter and non-circular pipelines. To address the issues of main shaft bending and bearing crushing encountered during the operation of the driving system in mobile trenchless spiral winding pipeline rehabilitation equipment, a transverse stiffness model of the shaft system considering bearing stiffness was established based on an analysis of its topological structure. The effectiveness of the modeling approach was validated using finite element simulation techniques. A qualitative analysis of the shaft system's flexibility was conducted with the inclusion of bearing factors. In the modeling process, the integral method was employed to analyze the shaft system stiffness with consideration of bearing stiffness. This provides preliminary theoretical support and essential technical preparation for the subsequent dynamic modeling of the entire machine.