The principle of operation of the mechanism of rotary machines of axial type has been considered in detail earlier. A characteristic feature of these machines is the forced movement of plates (blades) along the axis of rotation of the rotor, realized through their interaction with special guiding surfaces, the type of which completely determines the working properties of the machine. ...

One of the essential advantages of the mechanism of axial rotating machines is the possibility of realization of geometric closure of kinematic pairs formed by plates with guiding surfaces. However, accurate geometric closure requires consideration of some design and technological factors, which in the case of force closure can be chosen arbitrarily. ...

Traction devices with automatic regulation of wheel rail pressure provide a given mode of adhesion of smooth wheels with rails regardless of the track profile and changes in external load, which allows them to be used to move loads in inclined mine workings with any inclination angles.

Traction devices with automatic regulation of the force pressure of traction wheels to the rail depending on the resistance to movement are considered in the works of V. S. Bersenev.

The crank mechanism in general is unquely determined by three independent parameters, for example, the following: the crank mechanism in general is uniquely determined by three independent parameters, for example: the crank radius r; the relative connecting rod length λ = l/r (where l is the connecting rod length); and the relative offset ε = e/r (where e is the offset). We shall consider these parameters as variables. Then their domains determine the region of variation of crank mechanisms as a whole. The pattern of variations will provide a visual representation of the changes in the kinematic and dynamic characteristics of the crank mechanism as its parameters vary, which makes it possible to select the appropriate mechanism according to given specifications.

The traction devices developed at the LGI have one or two smooth drive wheels. The number of wheels, based on strength conditions, determines the possible traction force for given dimensions of the traction device.