A pulse hydropneumatic drive can make a percussive effect up to 15,000 J. A head carrying out a pulse effect (a blow) on an object is cocked in an operation position by liquid. At the same time occurs a compression of a working body (gas) in a gas accumulator. The pulse influence occurs because of head acceleration at the expense of a working body in a pneumatic accumulator. The operation of a pulse hydropneumatic drive depends on a number of parameters: viscosity and temperature of operating fluid, pressure of pneumatic accumulator initial charge and others. In the course of work oil becomes warm because of a high rate of travel in control equipment of a pulse drive in hydromains that results in changes in blow energy. A simulator describing stages and acceleration of the head of a pulse hydro-pneumatic drive. As a result of a numerical experiment carried out in the en-vironments of Mathcad and Matlab there are obtained dependences of blow energy upon working liquid tem-perature. To investigate the influence of different parameters of a pulse hydro-pneumatic drive upon its operation was designed and carried out a test bench which allows changing different parameters of a drive in a wide range. The experimental dependences of blow energy upon temperature of a working body and the dependences of blow energy upon working liquid viscosity are obtained. A comparative analysis of theoretical and experimental results which has given good convergence is carried out. The conclusions obtained: the operation of a pulse hydro-pneumatic drive is effected greatly both by the viscosity of a working body, and its temperature; the best values of head energy correspond to the mean viscosity of working liquid; to obtain a constant of blow energy it is necessary to use working liquids with stable viscosity at high tempera-tures: it is expedient that different additives should be used in working liquid to reduce a constant of friction and wear-resistance increase.
hydro-pneumatic drive, temperature, energy, efficiency, lubricant types, rate
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