Analysis of a high speed low-torque variable displacement hydro-motor efficiency at different displacement conditions

The high work rate, quick reversibility, and step-less gear ratio are some key features for designing efficient hydraulic mobile equipment. In this article overall performances as well the losses associated with the hydro-motor under variable displacement conditions have been investigated. The performance analyses have been carried out over a wide range of speed and load demands. The effect of the displacement conditions of the motor is taken into account consideration for the performance evaluation of the motor in an in-house fabricated closed-circuit hydrostatic drive system. For the present study, a variable displacement bent axis hydro-motor of capacity 28 cc has been used. From the rigorous experimentation, data are recorded under different operating conditions and at different motor displacements. The effect of losses on hydro-motor performance is characterized. The results obtained in the present study are likely to be helpful in the preliminary selection of similar hydraulic components as well as in optimizing their performance working in underground mining operations under adverse working conditions.