Experimental evaluation of the effectiveness of the pneumatic elastic elements in the cabs suspension systems of transport and technological self-propelled vehicles

The article investigates the various cab suspension design effectiveness in the transport and technological self-propelled machine (TSPM). The influence of methods and structural elements of the suspension to provide the necessary parameters of vibration protection is shown. As a result, the spectral characteristics of the cabin bench tests have been presented which were carried out on prototypes of vibration protection systems under various road conditions and driving conditions . The experimental evaluation of various elastic elements performance in the secondary suspension systems of TSPM booths was made. The conditions of reproduction (imitation) of real input impact on the cab from the side of the multi-axle vehicle carrier system at their attachment points on the hydropulsator stand were described. It was revealed that the cabin suspension system was the main factor to determine the crew vibration levels of the multi-axle TSPM, while the sprung seat with correctly chosen elastic-dissipative parameters could only slightly reduce the vibration level of the crew seats. The expediency of the joint use of the cab air suspension with elastic elements of the balloon and toroidal types together with the sprung seat was justified. An experimental evaluation of the installation effectiveness of hydraulic shock absorbers in the suspension of the TTSM cabs to provide the necessary damping was carried out. The results of an octave analysis of vertical vibration accelerations measured at various points of the cab with three types of suspension systems were presented, which showed the advantages of using pneumatic elastic elements with rubber-cord shells compared to rubber-metal vibration supports used in serial cab suspensions. It was shown that the use of pneumatic elastic elements with rubber-cord shells of a toroid type in the secondary suspension systems of TTSM cabins was possible without the application of a guide device (metal levers or special brackets), etc.

cab suspension, elastic elements, random input, spectral density, vibration accelerations, process dispersion

1. Смирнов Г.А. Теория движения колёсных машин. - М.: Машиностроение, 1990. - 352 с.

2. Ротенберг Р.В. Особенности колебаний многоосных автомобилей // Автомобильная промышленность. - 1963. - № 2. - С. 16-24.

3. Аксёнов П.В. Многоосные автомобили. - М.: Машиностроение, 1989. - 280 с.

4. Галашин В.А., Бородин В.П. Пневмогидравлические регулируемые системы подвески. - М.: МГТУ им. Н.Э. Баумана, 1989. - 41 с.

5. Гасанов Б.Г., Черненко А.Б., Сиротин П.В., Азаренков А.А. Частотные динамические характеристики кабины многоосного автомобиля с тремя вариантами систем подвешивания // Автомобильная промышленность. - 2017. - № 4. - С. 13-16.

6. Галашин В.А., Грушников В.А. Пути снижения вибронагруженности экипажа многоосных автомобилей // Труды НАМИ. - 1991. - № 211. - С. 47-57.

7. Афанасьев Б.А. [и др.] Проектирование полноприводных колёсных машин: учебник для вузов в 3-х т., Т. 1 / Под ред. Б.А. Афанасьева. - М.: Изд-во МГТУ им. Н.Э. Баумана, 2008. - 496 с.

8. Певзнер Я.М. [и др.] Колебания автомобиля. Испытания и исследования / под ред. Я.М. Певзнера. -М.: Машиностроение, 1979. - 208 с.