Load simulation and substantiation of design values of a pin flexible coupling with a flexible disk-type element

In the process of operation of present-day mechanical equipment, dynamic loads arise, leading to the failure of parts, assemblies and mechanisms and, thus, reducing the equipment life time and operational reliability. A method has been developed for calculating the design and technological values of a pin flexible coupling with a flexible disk-type element, using the method of central compositional rotatable uniform planning of the second order and the finite-element method for calculating stresses using a computer-aided design system. The analytical dependence of the torque on the PCD (pin (centers of holes for pin) circle diameter) and the width of the flexible element with certain physical and mechanical properties was substantiated, on the basis of which the formula for the total width of the flexible disk-type element was obtained, taking into account the value of the required torque and the given PCD. In order to check the obtained dependence of the nominal torque, an additional study of couplings with the given PCD was carried out at different total width of the flexible element. The implemented research allowed determining the influence of the design characteristic values on the transmitted torque of a pin flexible coupling with a flexible disk-type element. A standard-size range of couplings with certain design and technological values has been proposed.

Melodic Designs

The most flexible element of the “Sweet Thing” scheme is melody, the subject of Chapter 5. Because this component is so fluid, a great number of melodies defy categorization and seem largely unrelated to one another; and yet there are many that share noticeable characteristics of general shape and contour, which are here categorized under four titles: “Pirate,” “Stand By Me,” “Frog,” and “Blues Frog.” Moreover, these designs clearly relate back to earlier sources. The “Pirate” design, in particular, exhibits especially deep roots, extending back several centuries and ultimately adapted to the stylistic norms of twentieth-century popular music; but the “Stand By Me” and “Frog” designs also have clear origins in earlier music, the former in gospel hymnody and the latter in ragtime. In one of the most fascinating developments in the emergence of the “Sweet Thing” scheme, a melodic design descending from one branch mixes with a poetic form or rhythmic type—or both—descending from another, generating a new hybrid.

VALUE OF DEFORMATION ENERGY DEPENDING ON DEFORMATION OF FLEXIBLE PNEUMATIC ELEMENT

The article describes a flexible element used in flexible pneumatic couplings. These elements are manufactured by various manufacturers and are mostly made of rubber. Each element, depending on the number of bellows and diameter, has permissible stroke values. It is necessary to expend a certain amount of energy to compress and expand them. The article examines the amount of deformation energy required to compress and expand this elastic element.