To the calculation of horizontal rigidity of coiled springs
The article reveals the problems of the design of elastic vibration isolating elements of vibrating screens. Particular attention is paid to ensuring the equality of horizontal and vertical rigidity. Based on the calculation methods study of the coiled cylindrical springs stiffness, it has been established that the formulas used to calculate the horizontal stiffness give incorrect results. Thus, the goal of scientific research was to obtain a new relationship to determine the horizontal stiffness of a helical coil spring, that would make it possible to establish the rational parameters of the vibration isolating supports of the vibrating screens. On the analytical studies basis, the authors managed to obtain a relation between the horizontal and vertical stiffness of a coiled spring with a circular cross section of the coil. The analysis, which substantiates the hypothesis that it's impossible to produce a coiled spring with equal horizontal and vertical stiffnesses. Analytical relations for determination of the horizontal rigidityof the springs of round and rectangular cross sections of the coils have been received. Analytical relations provide the results with an error not exceeding 0,5%.On the basis of that, the authors give recommendations as to the promising directions in the development of the design of elastic vibration isolating elements of vibrating screens