STRUCTURAL DESIGN OF A ROTATING COMPOSITE CYLINDRICAL SHELL OF HIGH-PERFORMANCE CARDING MACHINE

Abstract

The cylinder is the heart of a carding machine. The composite structure of the cylinder consists of a composite cylindrical shell fixed at both ends that rotates at a constant speed around its axis. A simplified mechanical model of the filament winding composite forming and ribbing a metal cylinder is given, the differential equation of the boundary value problem of the laminated composite cylindrical shell is established, and the method for solving the static and dynamic characteristics is discussed. The PTC Creo5.0/ANSYS Workbench 2020R1 software program was employed to obtain the results used in the design and calculation models of the cylinder rotor structure system of a high-performance carding machine based on different established structural parameters and material combinations. The deformation and the critical speed of the cylinder rotor system under the combined action of the metallic clothing wrapping tension and centrifugal inertia force were calculated. The analysis and calculation results showed that the working speed of the cylinder rotor structure system was far less than its first critical speed, and the system was operating in a rigid or quasi-rigid rotor state. Under the actions of the wrapping tension of the metallic card wire and centrifugal inertia force, the maximum radial deformation of the cylinder was less than 0.06 mm. Both the aluminum alloy and filament winding cylinders were found to be light weight and highly efficient, which provided an important basis and reference in the structural design, processing and manufacturing, assembly, working gap adjustment, and operation maintenance of the cylinder. These characteristics ensured the high-precision operation and efficient carding of the cylinder system. The research results obtained in this study can be used as a reference in the development of high-efficiency carding machines.