Testing device for hydraulic rope system tensile force equalizing unit

• Autorzy: Hrabovský Leopold , Frydrýšek Karel

Identyfikatory

DOI

10.2478/mme-2021-0004

• Języki publikacji: EN

Abstrakty

EN

Rope elevators, also referred to as traction elevators, have a cabin suspended from a system of ropes. The system of ropes consists of at least two load-bearing steel ropes with six strands or, from the point of view of easier bending, and currently more widespread, ropes with eight strands. Lifting or lowering of the car, run between the guides, is ensured by the frictional force of the steel ropes in the grooves of the traction disk of the elevator machinery. As the load-bearing capacity of the elevator increases, the required number of load-bearing ropes also increases, especially in the case where small diameter ropes are used in traction elevators. The actual weight of the car and the weight of the load must be evenly distributed among all supporting ropes that are used in the given layout of the elevator. Currently, several principles are known by which it is possible to detect and also change the values of the instantaneous magnitudes of the tensile forces acting in a system of ropes. The paper describes the principle of operation of hydraulic balancing of tensile forces in the system of supporting ropes, which uses the laws of hydromechanics and knowledge of pressure transfer to any place in the fluid, known as Pascal’s law. Balancing of differently set values of tensile forces in three supporting ropes, to values of the same size, can be simulated on a test device. This presents the correct operation of the hydraulic system and the possibility of balancing tensile forces in the system of supporting ropes described by the principle of hydraulic device.

Słowa kluczowe

EN

rope elevator; rope tensile force; fluid pressure; hydraulic tensile force equalizers

PL

wciągnik linowy; siła rozciągająca liny; ciśnienie cieczy

• Wydawca: Wydawnictwo Politechniki Łódzkiej
• Czasopismo: Mechanics and Mechanical Engineering
• Rocznik: 2021
• Tom: Vol. 25, nr 1
• Strony: 22--31
• Opis fizyczny: Bibliogr. 13 poz., il. kolor., fot., rys., wykr.

Twórcy

autor

Hrabovský Leopold

• VSB Technical University of Ostrava, Faculty of Mechanical Engineering, Institute of Transport, 17. listopadu 2172/15, 708 00 Ostrava - Poruba, Czech Republic

autor

Frydrýšek Karel

• VSB Technical University of Ostrava, Faculty of Mechanical Engineering, Department of Applied Mechanics, 17. listopadu 2172/15, 708 00 Ostrava - Poruba, Czech Republic

Bibliografia

• [1] Hrabovsky L. Apparatus Producing an Even Distribution of Strain into Carries. IOP Conference Series: Materials Science and Engineering, 245(2), 2017, 1-6.
• [2] Hrabovsky L. Tensile forces in lift carrier ropes exerted by the fluid pressure. Advances in Science and Technology Research Journal, 13(3), 2019, 31-37.
• [3] Hrabovsky L. and Koscak P. Detection and Change of Tension Forces Operating on Elevator Hoist Ropes. In IOP Conference Series: Materials Science and Engineering, 603(5), 2019, 1-8.
• [4] Hrabovsky L. and Maslaric M. Device designed for detection and setting the required tensile force in ropes. Advances in Science and Technology Research Journal, 12(1), 2018, 200-206.
• [5] Hrabovsky L. and Michalik P. A tension equalizer in lift carrying ropes. Advances in science and technology research journal 11(4), 2017, 326-332.
• [6] Vavrin M. ČSN EN 12385-4+A1, Ocelová drátěná lana - Bezpečnost - Část 4: Pramenná lana pro všeobecné zdvíhací účely (Steel wire ropes - Safety - Part 4: Stranded ropes for general lifting applications), 2008, (In Czech).
• [7] HPS - Load weighing sensor. Available at: http://www.mic elect.es/en/elevator-lift-products/micelect-load-weighing-dev ices (Access: 12.03.2020).
• [8] Hydraulic traction leveler. Available at: https://www.semi.cz/download/katalogove_listy/CJ/svisla/Hydraulicky vyrovnavac tahu.pdf (In Czech) (Access: 20.04.2018).
• [9] Rope load ekvalizer. Available at: https://brugglevator.com/static/document/RLE_Manual.pdf (Access: 29.05.2020).
• [10] Single-acting manual oil pump with 3l tank. Available at: http s://www.kardanka.cz/rucni-olej-pumpa-jednocinna-s-nadrzi-3l-23987.html, (In Czech) (Access: 05.06.2019).
• [11] Six-strand rope - 6x19M - WSC. Available at: https://www.lanaretezy.cz/sestipramenna-lana/sestipramenne-lano-6x19m-ws c/, (In Czech), (Access: 30.05.2020).
• [12] Standard double-acting hydraulic cylinders. Available at: https: //www.kardanka.cz/standardni-dvoucinny-hydraulicky-valec- 50-32-20-21402.html, (In Czech) (Access: 30.03.2020).
• [13] Tension Low Cost. Available at: https://www.ptglobal.com/ products/312-tension-low-cost-capacity-250kg-ATM0250A00 0XXX (Access: 05.06.2020).

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).