Abstract
The analysis showed the following tendencies of development and energy efficiency of designs of gearboxes for track machines: provision of a maximum level of efficiency, removal of rupture of a stream of the passed capacity, provision of a high level of reliability, decrease of power input on gearbox work, provision of convenience, simplicity of service and steering, engine braking maintenance, and also maintenance of a relatively low cost. The above-mentioned tasks are performed by including clutch pinion gears with the built in frictional amplifier elements in an automatic gearbox, and also during the effect of dynamic anisotropy of frictional bonds. Besides a torque transfer, the clutch gear carries out a safety clutch function. That means that there is sliding at a high rotational power. Factor of strengthening of the given link is Кstr → ∞ due to occurence of dynamic anisotropy of frictional bonds. Physical and mechanical characteristics of contacting surfaces are formed in the course of dynamic interaction of roughnesses in friction units at modes of dry and boundary friction. Essential-nonlinear friction processes, interconnected with dynamic processes on the contact area, define values of target characteristics of frictional system. They can fluctuate in a very wide range. The friction factor fmp for the same friction units at preservation of constant conditions and friction parameters can vary from zero to infinity that is an essence of dynamic anisotropy of frictional bonds.
Highlights
Technical and economic characteristics of modern land transport and technological means (LTTM) are closely connected with reliability and energy efficiency of their power transmissions
We have found out technical solutions of some practical problems on the basis of fundamental researches in the field of dynamics of machines, contact interaction of solids, and tribology, and with the help of fundamental theoretical bases of anisotropy of frictional bonds
As the researches of friction processes have shown, the transfer function does not reflect the real values of a friction factor, that are defined by dynamics of formations of adhesive and deformation bonds during elastic and dissipative friction processes
Summary
Complex automation of power transmissions of land transport (automobile and railway), and earth-moving machine systems (bulldozers, scrapers, graders, etc.), is one of the most important and actual tendencies of their development. We have found out technical solutions of some practical problems on the basis of fundamental researches in the field of dynamics of machines, contact interaction of solids, and tribology, and with the help of fundamental theoretical bases of anisotropy of frictional bonds. These solutions allowed creating a design of an automatic gearbox with technical and economic characteristics at the level of the best world samples.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
