Magnetic-mechanical accumulator of kinetic energy

Abstract

The paper focuses on the process of non-contacting kinetic energy accumulation at the dead-end positions of a reciprocating rectilinear motion with a variable stroke. It describes the development of a magnetic-mechanical accumulator that absorbs energy while the moving part is decelerating towards the dead-end position and releases the energy back to the system while it is accelerating from the dead-end position. At the same time, it enables stroke modification of a certain level with a minimal impact on the maximum force of the accumulator. With respect to the magneto-static analysis of components, the preload of the mechanical element has been set accordingly. The dynamic analysis of the system has been carried out and the prototype produced and tested on the testing rig.

Enhanced Central System of the Traversing Rod for High-Performance Rotor Spinning Machines

“…Based on the previous research of the traversing system, the new magnetic-mechanical accumulator of kinetic energy was invented at the Technical University of Liberec and described in [15,2]. This system uses the repelling force of strong permanent magnets in combination with a preloaded mechanical spring.…”

“…The linear differential equation (1) is then modified to nonlinear by adding the vector of external forces Fm(x), see equation (2). This vector covers the external magnetic force Fm(x) exerted upon the particular element in the middle of each section.…”

“…In order to describe also the system with magnetic-mechanical accumulators the original model has been modified. The onesection length model with detailed accumulator definition, described in [2], uses both the magnetic parts and the preloaded spring to define the system behaviour. This description requires contact implementation and thus increases computing time considerably.…”

“…This brings heavy demands on the moving elements, expeciallyon the central system of traversing rod [1]. Solutions enabling further enhancement of such system, for example, the accumulation of kinetic energy at the reversal points [2,3,4], are therefore vital for introducing high-performance rotor spinning machines with the central system of the traversing rod.…”