Abstract
One of the main elements of safe operation of gravity flow racks used in pallet racks is a brake roller. The most promising design is a centrifugal brake roller of magnetic (eddy current) type. The principle of operation of such rollers is based on the laws of electromagnetic induction and involves the deceleration of a conductor moving in a magnetic field, due to the interaction of eddy currents (or Foucault currents) arising in the volume of the conductor, with an external magnetic field. The mathematical model of the process of pallet movement along a centrifugal brake roller of magnetic type is developed in the article. The equation of the speed of movement of the pallet along the centrifugal brake roller of magnetic type is obtained. Comparative analysis of the speed of movement of a pallet along centrifugal and disc brake rollers of magnetic type is carried out.
Highlights
As a safety device for limiting the speed of movement of pallets with a load in gravity pallet racks [1, 2, 3], centrifugal friction rollers have found the most widespread use [4]
The principle of operation of such rollers is based on the laws of electromagnetic induction and involves the deceleration of a conductor moving in a magnetic field, due to the interaction of eddy currents arising in the volume of the conductor with the external magnetic field [5]
It is found that the speed of movement of the pallet along the disk MBR represents an almost linear dependence, while the slope of the speed graph is determined by the coefficient of magnetic viscosity, the experimental studies of which are described in [7]
Summary
As a safety device for limiting the speed of movement of pallets with a load (hereinafter referred to as the pallets) in gravity pallet racks [1, 2, 3], centrifugal friction rollers have found the most widespread use [4]. They have a number of disadvantages, the main of which is the wear of the brake facing, and, as a consequence, the change in the braking characteristics of the roller. It is found that the speed of movement of the pallet along the disk MBR represents an almost linear dependence, while the slope of the speed graph is determined by the coefficient of magnetic viscosity, the experimental studies of which are described in [7]
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