Effect of elastic valve characteristics on pneumatic impact ring machine capacity

The possibility of using construction design with a stationarily installed conical ring-shaped elastic valve in pneumatic impact machines is considered. Using a simulation model of the contact interaction of the striker with the valve, the shape of the valve was optimized and its applicability was proved for sealing the return strike chamber.

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DESIGNING ANNULAR ELASTIC VALVE THAT CONTROLS AIR EXHAUST FROM WORKING CHAMBER OF PNEUMATIC IMPACT MACHINE

Interexpo GEO-Siberia ◽

10.33764/2618-981x-2021-2-4-78-86 ◽

2021 ◽

Vol 2 (4) ◽

pp. 78-86

Author(s):

Alexander Yu. Primychkin

Keyword(s):

Distribution System ◽

Energy Performance ◽

Design Stage ◽

Air Distribution ◽

Elastic Valve ◽

Impact Machine ◽

Energy Characteristics ◽

Working Chamber ◽

Pneumatic Impact ◽

And Control

The paper considers one of the promising shut-off and control elements of the air distribution system of pneumatic impact machines - an annular elastic valve (CUV). This element allows you to reduce the energy consumption of pneumatic devices. Unfavorable combinations of factors that hinder the movement of the valve necessary for sealing the working chamber are considered. The paper presents a method for calculating the elastic valve that controls the release of energy from the return chamber of the pneumatic impact machine, which allows determining the main geometric dimensions of the valve device at the design stage, which provides a stable self-oscillating cycle of the pneumatic impact machine with the specified energy characteristics. The developed technique was used in the modernization of the air distribution system of the ring impact machine (KUM), designed for immersion of rod elements in the ground. Tests of the resulting sample in production conditions confirmed the increase in energy performance compared to previously produced machines of a similar type.

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Pneumatic pulsator design as an example of numerical simulations in engineering applications

Open Engineering ◽

10.2478/s13531-011-0050-5 ◽

2012 ◽

Vol 2 (1) ◽

Cited By ~ 3

Author(s):

Krzysztof Wołosz ◽

Jacek Wernik

Keyword(s):

Fluid Dynamics ◽

Numerical Simulation ◽

Cast Iron ◽

Numerical Simulations ◽

Stress Analysis ◽

Aluminium Alloy ◽

Loose Material ◽

Engineering Applications ◽

Pressure Losses ◽

Pneumatic Impact

AbstractThe paper presents the part of the investigation that has been carried out in order to develop the pneumatic pulsator which is to be employed as an unblocking device at lose material silo outlets. The part of numerical simulation is reported. The fluid dynamics issues have been outlined which are present during supersonic airflow thought the head of the pulsator. These issues describe the pneumatic impact phenomenon onto the loose material bed present in the silo to which walls the pulsator is assembled. The investigation presented in the paper are industrial applicable and the result is the working prototype of the industrial pneumatic pulsator. The numerical simulation has led to change the piston shape which is moving inside the head of the pulsator, and therefore, to reduce the pressure losses during the airflow. A stress analysis of the pulsator controller body has been carried out while the numerical simulation investigation part of the whole project. The analysis has made possible the change of the controller body material from cast iron to aluminium alloy.

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