The hydrodifferential rectifier of the moment of inertial automatic transmission of mobile machines

Abstract

The article considers the possibility of using torque in the inertial-pulse automatic transmissions of a hydrodifferential rectifier, in the design of which hydraulic machines are used as free-wheel clutches. Unlike mechanical freewheel clutches, where the weakest of their links are the jamming bodies, in the proposed construction the jammed body is hydraulic fluid, which allows to eliminate the above-mentioned drawback and reduce wear. A kinematic scheme of inertial transmission with a hydrodifferential torque rectifier is given and the working process is described on three characteristic operating modes: stop, torque and direct transmission. Dependences for calculation of basic parameters of hydraulic clutches of a free wheel are given, and also theoretical and experimental results of researches of working capacity of the inertial hydrodifferential torque transformer are presented. An analysis of the results showed that with increasing internal leakage of the working fluid, which increase as a result of wear of the hydrodifferential torque rectifier, the power and torque on the shaft of the hydraulic machine will decrease, which in turn will decrease the efficiency of the hydrodifferential rectifier. The analysis of the results showed that at the beginning of operation the efficiency of the hydrodifferential rectifier is about 93% in the entire operating range. During operation, the efficiency of transmission decreases linearly and at a radial gap of 300 ÷ 350 μm is only 68 ÷ 63%. With further deterioration (radial clearance 350 ÷ 400 μm), the efficiency is practically not reduced. This indicates that the hydrodifferential rectifier of the torque has completely worn out and its replacement is required.