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1
Content available Analysis of glass gatherer robot's vibration damping using the original and modified design of the friction damper
Stembalski Marek, Roszkowski Andrzej, Skoczynski Waclaw, Turek Pawel, Fenc Rafal
Journal of Machine Engineering
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2020
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Vol. 20, No. 4
139--151
EN
This paper presents the results of tests carried out on the glass robot’s lance equipped with a prototype friction damper. Two ways of mounting the damper (the original design and the modified design) are described. A series of experimental tests were carried out for each of the ways of mounting to determine the lance operating conditions at which the damper worked most efficiently. Resonance curves were determined for each of the designs and it was found that the modified structure reduced vibrations to a greater degree, which clearly indicates that the modified solution ensures a higher vibration damping efficiency.
2
Content available remote Testing the vibration damping of a glass gatherer robot arm using a friction damper
Stembalski M., Skoczyński W., Roszkowski A., Preś P.
Archives of Civil and Mechanical Engineering
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2017
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Vol. 17, no. 2
240--248
EN
This paper describes a test stand along with a model of a lance used in glass works. A prototype friction damper was used for vibration damping of the lance. Experimental tests were conducted, whose aim was to determine operating conditions under which the damper will be the most effective. Damping was evaluated based on the damping decrement determined using the resonance curve for the first form of vibration of the lance. It was found that a friction damper has optimal values of preload force from the point of view of damping of the lance's resonant vibration.
3
Content available Perspective method to guarantee the reliability for the rolling stock of the railway
Golybenko A., Gubacheva L., Andreev A., Mokrousov S., Shcherbakov V.
Transport Problems
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2012
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T. 7, z. 4
33-37
EN
The design method how to increase the reliability of the railroad underframe frictional dampers has been given. The new design for frictional wedge has been suggested, it helps to decrease both the wear of friction wedge and the deterioration of the connected with shpinton sleeve.
4
Content available Numerical model of fricional damper for glas – making robot lance
Stembalski M., Skoczyński W., Roszkowski A.
Journal of KONES
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2012
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Vol. 19, No. 1
391-398
EN
The need to design a friction damper for glass-making robots arose because of the excessive vibrations, which occur in the course of their work. The robots are commonly used in the manufacture of glassware. The vibrations adversely affect the work of ball gatherers, which results in a large number of defects in the finished glass products. As a result of the vibrations molten glass may become unevenly distributed on the ball's surface and as the material flows down the ball into the mould the thermal conditions of its solidification may change. It is proposed to damp the vibrations by means of a prototype friction damper mounted directly on the ball gatherer lance. The glass-making robot lance with the friction damper was modelled. The vibrations of the glass-making robot lance tip under static load and impact excitation were measured during simulations. Also the relative displacements of the damper rings in the course of the excitations were measured. Moreover, the dependence between the preload force and the system's damping decrement was determined. The main aim was to select proper operating parameters for the proposed structure in order to obtain maximum system damping.
5
Content available remote Rozwój konstrukcji amortyzatora ciernego stosowanego w specjalnych pojazdach gąsienicowych
Martyniak T.
Szybkobieżne Pojazdy Gąsienicowe
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2010
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nr 1 (25)
51--62
PL
W artykule przedstawiono rozwój konstrukcji amortyzatorów ciernych jak i układu sterowania zmienną regulacją charakterystyką jego tłumienia. Opisano również autorską koncepcję półaktywnego zawieszenia pojazdów specjalnych z zastosowaniem magistrali CANbus.
EN
Friction damper design development as well as variable control system of its damping characteristics has been presented in the paper. Author's concept of semi-active suspension of special vehicles using CANbus was described as well.
6
Content available Analysis of damping of vibrations through a frictional damper
Skup Z.
Journal of Theoretical and Applied Mechanics
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2010
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Vol. 48 nr 2
465-478
EN
This paper presents a study of damping of non-linear vibrations in a one-degree-of freedom model of a mechanical system containing a friction damper. The vibrations of the system due to harmonic excitation is considered on the assumption of uniformly varying frequency and a constant amplitude of the exciting force. The simultaneous phenome- non of structural friction (passive damping) has been considered as well. The problem is considered on the assumption of a uniform unit pressure distribution between contacting surfaces of the friction conic inner and outer rings. The aim of the analysis is to asses the influence of angular acceleration, amplitude of the exciting force and the reduced mass on resonance curves during the start-off. The equations of motion of the examined system were solved by means of the Krylov-Bogolubov-Mitropolski method and digital simulation.
PL
W pracy przedstawiono badania tłumienia drgań nieliniowych układu mechanicznego o jednym stopniu swobody zawierającego amortyzator cierny. Rozważany jest rozruch układu przy wymuszeniu harmonicznym z jednostajnie zmienną częstością o stałej amplitudzie siły wymuszającej. Uwzględniono tłumienie drgań, wykorzystując zjawisko tarcia konstrukcyjnego (tłumienie pasywne). Zagadnienie rozpatrywane jest przy założeniu równomiernego rozkładu nacisków jednostkowych występujących pomiędzy współpracującymi stożkowymi powierzchniami ciernymi pierścieni tłumika. Zbadano wpływ przyspieszenia kątowego, amplitudy siły wymuszającej drgania oraz masy zredukowanej na krzywe rezonansowe drgań rozruchowych. Równania ruchu badanego układu mechanicznego rozwiązano wykorzystując asymptotyczną metodę Kryłowa-Bogolubowa-Mitropolskiego i metodę symulacji cyfrowej.
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