INCREASE OF STABILITY OF GEOMETRICAL DIMENSIONS OF HOLES ACQUIRED BY IMPULSE HYDROABRASIVE BROACHING
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- TITLE: INCREASE OF STABILITY OF GEOMETRICAL DIMENSIONS OF HOLES ACQUIRED BY IMPULSE HYDROABRASIVE BROACHING
- ABSTRACT: The paper presents the results of researches of efficiency of processes hydroabrasive broaching of the holes with the means of copying method and it has been shown that the use of traditional means for this technology is extremely energy inefficient. It is noted that power losses are defined by the fact that in the hydraulic system the multiple conversions of energyoccur, in the result of which mechanical work of the actuator is converted into kinetic energy of the flow stream. However, excessive power losses are caused by cyclical execution of the holes, as the time for the positioning and deployment of the automation systems of the jet exceeds the operating time (in the case perforating of the protective screens for turbine-driven generators does not exceed 0.5 sec.). The analysis of operation of typical hydraulic unit of hydrocutting machine was being held, the results of measurements of power losses in the individual circuits are given. There were suggested to determine the energy efficiency of the process with the corresponding coefficient, taking into account not only the energy parameters but the cyclic operation of the device. There was proposed the working principle of the hydraulic system in which the energy losses will be minimized by appropriate control of the main pump.
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