Abstract
This paper reports the comparison of two physical principles of action of suspension damping devices based on their influence on the mobility indicators for an 8×8 wheeled machine. A radical difference between these principles of action is the dependence of resistance forces on the speed of the relative movement of working bodies (internal friction: hydraulic shock absorbers) or on the relative movement of working bodies (external friction: friction shock absorbers). Widespread hydraulic shock absorbers have certain disadvantages that do not make it possible to further increase the mobility of wheeled or tracked vehicles without the use of control and recuperation systems. In turn, in friction shock absorbers, the use of new materials has eliminated many of their shortcomings and thus can provide significant advantages. It was established that the application of friction shock absorbers for a given wheeled vehicle did not significantly affect the speed compared to hydraulic ones. The main factor that prevented the implementation of the advantages of friction shock absorbers was the insufficient suspension travel. However, friction shock absorbers absorbed 1.76...2.3 times less power, which reduced the load on nodes and increased efficiency (autonomy). In addition, a more uniform load on suspensions was ensured, which improved their resource, and, due to the prevailing vertical oscillations of the suspended body over the longitudinal-angular ones, the geometric passability improved as well. The comparison of two physical principles of action of damper suspension devices in a wheeled vehicle has shown that the use of friction shock absorbers could provide significant advantages in resolving the task relates to improving the mobility and would fundamentally affect the choice of the suspension energy recuperation system if it is applied.
Highlights
Damping devices (DDs) are an important component of the suspension in a vehicle
This is especially true of vehicles intended for movement in cross-country areas with high average speeds, in particular military wheeled vehicles (WVs), for which mobility indicators are among the main ones
The most widespread principles of action (PPA) now is based on the conversion of the energy of oscillations in a vehicle’s suspended body into thermal energy by means of internal friction, which is implemented in the form of hydraulic shock absorbers (HSAs)
Summary
Damping devices (DDs) are an important component of the suspension in a vehicle. The achieved level of both functional and economic and anthropological criteria for vehicle design, in particular mobility and its indicators, depends on DD perfection. That is why researchers in developed countries are constantly looking for new technical solutions (TSs) and the physical principles of action (PPA) of suspension nodes and new materials for their execution This is especially true of vehicles intended for movement in cross-country areas with high average speeds, in particular military wheeled vehicles (WVs), for which mobility indicators are among the main ones. Despite a large body of scientific research and numerous patents, and given many unresolved problems, there are currently neither control systems nor recuperation systems that would be suitable for widespread implementation This applies to WVs for both civilian and military purposes. Solving it would make it possible to devise effective TSs suitable for wide use, as well as improve the mobility and efficiency of vehicles
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More From: Eastern-European Journal of Enterprise Technologies
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