| 摘要 |
FIELD: general engineering; agricultural and industrial tractors and other self-propelled machines. SUBSTANCE: tractor hydraulic drive system has propelling device positive displacement drive with pump, hydraulic motor, power and drain hydraulic lines and make-up hydraulic line, and mounting hydraulic system with pump, hydraulic distributor, hydraulic cylinder, filter installed on drain line and hydraulic tank. Hydraulic accumulator is installed additionally in tractor hydraulic drive system. Input of hydraulic make-up line communicates with working space of hydraulic accumulator. Two-line valve controlled by divider of hydraulic accumulator is installed at outlet of mounting hydraulic system drain hydraulic line. Two-line valve is closed in process of charging of hydraulic accumulator and is opened at discharge, and above-indicated drain line communicates on section behind filter with make-up hydraulic line through check valve. EFFECT: improved power characteristics and simplified design of positive displacement hydraulic transmission of tractor propelling devices. |
