System of differential equations of the working process of pneumatic impact machines
Abstract
A pneumatic percussion machine is a piston heat engine in which the potential energy of the working fluid (compressed air) is cyclically converted into the kinetic energy of the piston. The piston (striker) of this machine moves reciprocatingly under the action of compressed air pressure alternately supplied to the cylinder cavities by a special air distribution device. The kinetic energy of the piston is transferred to the working tool (drill, pick, chisel, etc.) upon their impact at the end of each cycle. Therefore, when studying the working processes of pneumatic percussion machines, one should choose a method that reflects both the nature of the thermodynamic processes occurring over time in the cylinder cavities and the nature of the piston motion. This leads to the necessity of jointly solving the system of differential equations of the energy balance of open thermodynamic systems in the cylinder cavities and the equation of motion of the piston.
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References
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