Wyniki wyszukiwania dla: ELECTRO-ACTIVE LUBRICATION

• Hybrid piezoelectric motor based on electroactive lubrication principle

  Publikacja

  • R. Ryndzionek
  • Ł. Sienkiewicz
  • M. Ronkowski
  • J. Rouchon
  • D. Harribey
  • D. Tran

  - Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały - Rok 2012

  A novel conception of hybrid piezoelectric motor is presented in this paper. Proposed conception required synchronised work of quasi-static and resonant piezoelectric actuators that results in a rotary movement. The motor's working principle is explained and the main characteristics are described. Studied topology is compared to the existing piezoelectric motors with regards to its field of applications. The assembling process...

• Research of hydrotronic variable displacement radial piston pump with electro -pneumatic control

  Publikacja

  • R. Jasiński

  - Solid State Phenomena - Rok 2010

  The paper presents the developed new electro-pneumatic control (pneumotronic) system for hydraulic fixed-displacement radial piston pump. Hydraulic fixed-displacement radial piston pump equipped with the proposed control system changes into hydrotronic variable-displacement radial piston pump. Pump flow rate control is realized by means of programmable logic controller, electro-pneumatic valves, pneumatic cylinders and a sensor.

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• Active Suppression of Nonstationary Narrowband Acoustic Disturbances

  Publikacja

  • M. Niedźwiecki
  • M. Meller

  - Rok 2021

  In this chapter, a new approach to active narrowband noise control is presented. Narrowband acoustic noise may be generated, among others, by rotating parts of electro-mechanical devices, such as motors, turbines, compressors, or fans. Active noise control involves the generation of “antinoise”, i.e., the generation of a sound that has the same amplitude, but the opposite phase, as the unwanted noise, which causes them to interfere...

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• Experimental research on a hydrodynamic thrust bearing with hydrostatic lift pockets: Influence of lubrication modes on bearing performance

  Publikacja

  • J. Bouyer
  • M. Wodtke
  • M. Fillon

  - TRIBOLOGY INTERNATIONAL - Rok 2022

  The aim of the study is to investigate the performance of a thrust bearing equipped with hydrostatic lift pockets under different lubrication modes. Three types of flat land bearing lubrication modes are studied experimentally: hydrostatic lubrication (HS; forced oil injection to the pockets), hybrid lubrication (HS + HD; hydrostatic lubrication combined with the external forced bearing oil supply) and hydrodynamic lubrication...

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• LUBRICATION ENGINEERING

  Czasopisma

  ISSN: 0024-7154

• Friction and Lubrication of Large Tilting-Pad Thrust Bearings

  Publikacja

  • M. Wasilczuk

  - Lubricants - Rok 2015

  Fluid film bearings have been extensively used in the industry because of their unbeatable durability and extremely low friction coefficient, despite a very low coefficient of friction dissipation of energy being noticeable, especially in large bearings. Lubricating systems of large tilting pad thrust bearings utilized in large, vertical shaft hydrogenerators are presented in this paper. A large amount of heat is generated due...

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• Research on Linear Actuators for Active Foil Bearings

  Publikacja

  • Ł. Breńkacz
  • R. Kędra
  • W. Janicki
  • A. Maurin
  • P. Bagiński
  • A. Andrearczyk
  • B. Zima

  - Materials - Rok 2022

  Active foil bearings are a kind of gas foil bearing. They contain actuators which allow for modification of the bearing sleeve size and the shape of the lubrication gap. Rotor vibrations can be actively controlled by these changes. It is possible, among other things, to reduce the starting torque, control the vibration amplitude at different speeds and improve operational safety. Prototypes of active foil bearings are being developed...

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• Electro-photoluminescence in organics

  Publikacja

  • J. Kalinowski
  • M. Cocchi
  • D. Virgili
  • V. Fattori
  • J. Williams

  - CHEMICAL PHYSICS LETTERS - Rok 2007

  Elektro-fotoluminescencję zaobserwowano w układzie ITO(+)/emiter/Ca(-), gdzie emiter wzbudzany światłem UV (350nm) zawierał dendrymer aminowy m-MTDATA, pochodną fenantroliny BPT i organiczny kompleks platyny PtL2Cl. Widmo fotoluminescencji pochodzi od singletowych ekscypleksów m-MTDATA:BPT i trypletowych ekscypleksów m-MTDATA:PtL2Cl. Ze wzrostem pola elektrycznego następuje wygaszanie ekscypleksów na skutek ich dysocjacji na nośniki...

• Optical activity and electro-optic effect of l-arginine doped KDP single crystals

  Publikacja

  • M. Shopa
  • Y. Shopa
  • E. Kostenyukova
  • I. Pritula
  • O. Bezkrovnaya

  - OPTICS AND LASER TECHNOLOGY - Rok 2019

  We have used the modified polarimetric methods to study optical activity (OA) in the potassium dihydrogenphosphate (KDP) crystals doped with 0.7, 1.4 and 3.8 wt% L-arginine (L-arg) amino acid. Crystals were grown by the temperature reduction method. Small changes of the absolute eigen waves ellipticity and OA values in doped crystals were noted. We have experimentally determined the signs of OA in the [1 00] and [01 0] directions...

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• Noise and Electro-Ultrasonic Spectroscopy of Conducting PolymerThick Films

  Publikacja

  • V. Sedlakova
  • J. Majzner
  • P. Sedlak
  • M. Kopecky
  • J. Sikula
  • L. Hasse
  • A. Szewczyk

  - Rok 2011

  Thick conducting films based on conducting polymer are characterized by DC conductivity and noise in temperature range 10 to 300 K. Conducting polymers could be used e.g. for the top electrode (cathode) in the solid tantalum or niobium capacitors. On the conducting polymer layer the top layer of carbon/graphite and/or silver polymer based pastes is applied in the capacitor technology. Our samples structure consists of conducting...