ANALYSIS OF THE STRESS-STRAIN STATE OF CONTACTING ELEMENTS OF HYDRAULIC TRANSMISSIONS FOR ADVANCED TANK TRANSMISSIONS UNDER VARIATION AND PERTURBATION OF THE SHAPE OF SURFACES AND PROPERTIES OF BODY MATERIALS

The paper describes the study of the stress-strain state and of the contact interaction of hydraulic transmission elements for advanced tank transmissions. The shape of the treadmill and the ball piston of the radial hydraulic volume transmission, as well as the stiffness of the surface layers of these elements, are varied. A change in the shape and size of the contact area between the piston and the raceway of the hydrovolumetric transmission is observed. At the same time, the distribution of contact pressure, its nature, and maximum values change. It has been established that in certain design variants, the oval shape of the contact area is transformed into a rounded rectangle, a dumbbell-shaped figure, or two isolated areas. This, in turn, has a significant impact on the stress-strain state of the ball piston and stator ring of the fluidized bed transmission. By varying these parameters, the dependence of strength characteristics on them was established. Such regularities are the basis for substantiating advanced technical solutions for hydraulic volumetric gears in terms of strength, durability, and load capacity. The developed parametric model has the property of being extended to various other parameters. This makes it possible to create specialized databases. These databases concentrate information on the dependence of the strength characteristics of hydraulic-volume gears on certain parameters. Accordingly, it is possible to solve the inverse problem of substantiating rational technical solutions for hydraulic gears. The developed approach can be extended to a wide class of structural elements.