To Refining the Thermo – Mechanical Model of Vane Type Air Motor

Abstract Vane pneumatic motors (PM) are the most popular products among rotary vane machines in both hydraulic and gas (pneumatic) versions. Mathematical modeling is widely used to solve some problems of vane PM: analysis and synthesis the new PM designs, in order to increase their energy efficiency, resource and other operational characteristics. This paper presents a refined mathematical model of a vane PM, taking into account the effect of heat generated during friction of the vanes against the stator and rotor slots on the thermodynamic process in the working chambers, as well as mechanical losses in the rotor bearings with their mode of operation. The parameters of the friction and heat transfer model, which are rather difficult to measure in a real structure, were determined by the vector identification method, by comparing the experimental and calculated mechanical and flow characteristics of the PM, as well as the temperature of the compressed air at the exhaust. The results obtained make it possible to more reasonably approach the solution of choosing the PM parameters at the stage of its mathematical modeling.