Search Results for “Yevchik V. S.” – Collected book of scientific-technical articles

13.1.2018 On Selection of Materials for Creation of Modern LV Thermostating System Mating Hoses

Вацлав Самусевич — Tue, 05 Sep 2023 06:52:56 +0000

13. On Selection of Materials for Creation of Modern LV Thermostating System Mating Hoses

Authors:

Bigun S. O.¹, Yevchik V. S.², Khorolskyi M. S.²

Organization:

Yangel Yuzhnoye State Design Office, Dnipro, Ukraine¹; State Enterprise “Ukrainian Research Design-Technological Institute of Elastomer Materials and Products”, Dnipro, Ukraine²

Page: Kosm. teh. Raket. vooruž. 2018 (1); 72-84

DOI: https://doi.org/10.33136/stma2018.01.072

Language: Russian

Annotation: A series of materials is proposed for creation of space launch vehicle low-pressure air thermostating systems joints hoses. The topical issues are considered of materials designing with consideration for specific features of the hoses as special industrial rubber articles of launch vehicle launch sites.

Key words:

Bibliography:

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9. Lotakov V. S., Yevchik V. S., Utlenko E. V. et al. Investigation of Operability of Rubbers with Adhesion Additives in Rubber-Metal Valves. Manufacture of Tires, Rubber Products and ATI. М., 1980. No. 4. P. 43-44.

10. Lotakov V. S., Yevchik V. S., Markova L. A. et al. Investigation of Alkali Impact on Adhesive Properties of Ethylene-Propylene Vulcanizing Agents. Caoutchouc and Rubber: Scientific–Technical Report. UNIKTI-DINTEM SE. 1981. No. 6. P. 18-19.

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12. Yevchik V. S., Bogutskaya E. A., Khorolsky M. S. Investigations to Select Optimal Options of Replacing Raw Materials and Rubbers with Specifying Guaranteed Service and Storage Life of Rubber Products Being Components of 11K77 Article: Scientific–Technical Report DO-468-2000, UNIKTI-DINTEM SE. 2000. 55 p.

13. Nudelman Z. N., Lavrova L. N. Effective Vulcanization of Fluorine Rubbers. The III Ukr. International Scientific-Technical Conference of Rubber Industry Workers: Collection of abstracts. Dnepropetrovsk, 2000. 43 p.

14. Semyonov G. D., Yevchik V. S., Zaitseva T. P., Lotakov V. S. Prospects of Using New Vulcanizing Systems in Rubber Mixtures Based on Fluoroelastomers: Scientific–Technical Report. К., 2001. No. 3. 18 p.

15. Yevchik V. S., Zaitseva T. P., Khorolsky M. S. Investigations of Physical-Mechanical Characteristics of Rubbers Based on Caoutchoucs of New Generation: Scientific–Technical Report DO-387-89, DF VNIIEMI. Dnepropetrovsk, 2000. 61 p.

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7.1.2023 Specificity of using rubbers as structural materials for making connector assemblies of temperature conditioning systems

manager — Fri, 12 May 2023 16:10:58 +0000

7. Specificity of using rubbers as structural materials for making connector assemblies of temperature conditioning systems

Authors:

Khorolskyi M. S.², Bigun S. O.¹

Organization:

Yangel Yuzhnoye State Design Office, Dnipro, Ukraine¹; State Enterprise “Ukrainian Research Design-Technological Institute of Elastomer Materials and Products”, Dnipro, Ukraine²

Page: Kosm. teh. Raket. vooruž. 2023 (1); 63-69

DOI: https://doi.org/10.33136/stma2023.01.063

Language: Ukrainian

Annotation: Explosive bolts are widely used as actuating devices in the spacecraft separation systems. Explosive bolt body is divided into parts as a result of engagement of the pyromixture placed inside. Activated explosive bolts have negative mechanical effect on the interface elements and sensitive electronic devices installed nearby owing to explosive behavior of the pyromixture combustion, generating shock front with high pressure and velocities, impacts and collisions of the structural units. Cumulative effect of the above factors on the separated objects is called pyroshock. For separation systems with increased requirements to external actions and cleanliness, authors developed a shear explosive bolt or pyrobolt, divided into parts, cutting the body walls in segments, which are set in motion by action of the pressure of gases, released as a result of pyrocartridge activation. The basic sources of pyroshock for these shear explosive bolts with segments are: combustion of pyromixture, internal impacts of structural units against the bolt body; cutting of body wall in segments, release of preliminary deformed interface after activation. Structural solutions are presented to reduce the pyroshock per each of the components. Vibration impulsive loading during pyromixture combustion is reduced by optimization of explosive quantity, finding its minimum to provide the reliable activation of the device. To reduce the impact on the explosive bolt elements and shock front interface the rubber gasket is installed in the path of shock wave distribution, partially disseminating and absorbing its kinetic energy. Damper, made of easily deformable aluminum alloy, is also installed to decrease the internal impact of the rod against the explosive bolt body. Functional testing of the device, using the pendulum suspension and measuring separation speed and vibration impulsive loading, showed that body parts of the shear explosive bolt with segments are separated without significant impact loads and discharge of high-temperature gases and debris, providing reliable separation of compartments and units without damaging the sensitive equipment. Obtained values of the mechanical momentum, I = 0,4÷0,7 N•s and shock load spectrum – g-load 1950 g at the frequency range up to 5000 Hz, meet the up-to-date requirements to pyrotechnical devices.

Key words: explosive bolt, pyroshock, shock wave, pyrocartridge, high-temperature gases, damper

Bibliography:

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2. Bigun S. A., Khorolskiy M. S. Problemnye voprosy sozdania uzlov stykovki system termostatirovania raket kosmicheskogo naznachenia. Kosmicheskaya technika. Raketnoe vooruzhenie. Space technology Missile armaments: sb. nauch.-techn. st. GP «KB «Yuzhnoye». Dnepropetrovsk, 2013. Vyp. 2. S. 132-138.
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10. Bigun S. A., Yevchik V. S., Khorolskiy M. S. O vybore materialov dlya sozdaniya rukavov stykovki system termostatirovania sovremennyh RKN. Kosmicheskaya technika. Raketnoe vooruzhenie. Space technology Missile armaments: sb. nauch.-techn. st. GP «KB «Yuzhnoye». Dnepr, 2018. Vyp. 1. S. 72-84. https://doi.org/10.33136/stma2018.01.072
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13. Khorolskiy M. S., Bigun S. O. Shodo kontseptsii stvorennya vuzliv stykuvannya system termostatuvannya raket kosmichnogo pryznachennya. Systemne proektuvannya i analiz characteristic aerokosmichnoi techniki: zb. nauk. pr. 2019. T. XXVII. S. 162-168.
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