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V. V. Buevich
V. V. Buevich
Student
Saint Petersburg State Mining Institute (Technical University)
Student
Saint Petersburg State Mining Institute (Technical University)

Articles

Electromechanics and mechanical engineering
  • Date submitted
    2017-04-26
  • Date accepted
    2017-07-14
  • Date published
    2017-10-25

Improvement of performance indicators of hydraulic drive of props of powered support units of heading complexes

Article preview

The method of reducing the dynamic loading of the support unit and the immediate roof rocks resulting from the successive operation of the safety valve during operation of the props in the regime of «equal resistance» is considered. In the developed working characteristic of hydraulic props of supporting units their overload protection is singled out into an independent function and is separated from the function of rock pressure control. The resistance of the hydraulic props of the support units to the roof rocks subsidence is regulated in a non-pulsed manner, and the movement of the support units can be carried out in a «non-unloading» mode. As a result, the static «trampling» of the intermediate roof is reduced, and in the regime of controlling the rock pressure, the dynamic impacts of the mechanized support on the intermediate roof are excluded. In this case, the protection of the support unit from overloads works only when the support is overloaded and does not directly participate in the formation of the process of rock pressure rock. The proposed non-pulse method provides controlled transmission of hydraulic energy with a small pressure drop from the head ends of the hydraulic props to the pressure line of the hydraulic system of the heading mechanized complex and its subsequent useful use.

How to cite: Stebnev A.V., Buevich V.V. Improvement of performance indicators of hydraulic drive of props of powered support units of heading complexes // Journal of Mining Institute. 2017. Vol. 227. p. 576. DOI: 10.25515/PMI.2017.5.576
Nanotechnologies and information technologies
  • Date submitted
    2011-08-02
  • Date accepted
    2011-10-19
  • Date published
    2012-02-01

The software for the control of capacitance structures parameters on the basis of electrostatic field power action use

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The software for the procedure of definition of parameters of a cap of condenser structure with mobile facings on  the basis of use of power action  of an electrostatic field is considered. The offered technique allows on one operation of removal volt – capacitance characteristics to define the whole complex of the major parameters of a cap – size of a working air gap, a membrane deflection, electret surface potential and a membrane tension. The expressions for  capacity of a cap as a function of specified parameters are obtained. The software is developed for the technique use, allowing to define required parameters of a cap and to estimate their error. The procedure considered in the present work is a not destroying   monitoring.

How to cite: Akchurin T.R., Pshchelko N.S., Buevich V.V. The software for the control of capacitance structures parameters on the basis of electrostatic field power action use // Journal of Mining Institute. 2012. Vol. 196. p. 289.
Humanities and fundamental researches
  • Date submitted
    2009-08-25
  • Date accepted
    2009-10-24
  • Date published
    2010-02-01

Using of electric field for manufacturing and nondestructive testing of a capacitor sensors and actuators

Article preview

Some designs of capacitor sensors and actuators which work is based on electric field use are considered. It is shown that these designs are rather cheap in manufacturing, but thus possess good technical characteristics. The theoretical substantiation of possibility of electrostatic forces use for balancing of a pressure difference in the corresponding measuring device is adduced. Procedure for definition of parameters of a condenser structure cap is considered. The procedure allows by means of one operation – volt-capacitance characteristic measuring – to define the whole complex of the major parameters of a cap-size of a working air gap, a membrane deflection, surface electret potential and a membrane tension. Analytical expression for capacitance of a cap depending on the specified parameters and measuring of its volt-capacitance characteristic allow to define these parameters by solving corresponding system of equations. The procedure considered in the present work is a method of a not-destroying control.

How to cite: Pshchelko N.S., Buevich V.V. Using of electric field for manufacturing and nondestructive testing of a capacitor sensors and actuators // Journal of Mining Institute. 2010. Vol. 186. p. 253-256.