نتایج جستجو برای: thrust bearing

تعداد نتایج: 84100  

2014
Kenji Yano Hideto Nakao Mihoko Shimoji Kenji YANO Hideto NAKAO Mihoko SHIMOJI

CO2 refrigerant with a high operating pressure has a large difference between the suction and discharge pressures in compressors. Because of a load increase, the high performance and high reliability of compressors are required. Compared to the scroll compressor employing the conventional refrigerant, the thrust load increases in the CO2 scroll compressor. Therefore the design of thrust bearing...

2002
Jie Pan Nabil Farag Terry Lin Ross Juniper

Propeller induced structural vibration through the thrust bearing is an important source for low frequency shipboard noise and underwater sound radiation from a submarine hull. Such vibration is investigated using a scaled experimental model. This research concentrates on the experimental characterization of propeller force, hydrodynamic force of the thrust bearing and vibration transmission th...

2014
Xiaodong Yu Qihui Zhou Xiuli Meng Huanhuan Li Dan Liu Xu Fu Bo Wu Li Tan Xuezhe Dong O. A. Mokhtar

In order to compute the thermal deformation of the hydrostatic thrust bearing in the heavy type CNC equipments, a numerical research concerning temperature field of multi-pad hydrostatic thrust bearing having sector cavity, rectangular cavity, Ishaped cavity and ellipse cavity is described. Three-dimensional temperature field of gap fluid between the rotation worktable and the base has been sim...

2014
Hajime Sato Takahide Itoh Hiroyuki Kobayashi

This paper presents frictional characteristics of thrust bearing in scroll compressor. The coefficient of friction in thrust bearing was measured by both elemental friction test and loss classification based on the performance test of actual scroll compressor, and investigated frictional characteristics focusing on the behavior of sliding portion which affects the generation of oil film by expe...

2014
Jaekeun Lee Hongseok Kim Byeongchul Lee Jinsung Park Jae Keun LEE Hong Seok KIM Byeong Chul LEE Jin Sung PARK

This paper presents the friction and anti-wear characteristics of nano-oil with a mixture of refrigerant oil and carbon nano-particles in the thrust slide-bearing of scroll compressors. Frictional loss in the thrust slide-bearing occupies a large part of total mechanical loss in scroll compressors. The characteristics of friction and anti-wear using nano-oil is evaluated using a thrust bearing ...

2017
Andrew Youssef David Matthews Andrew Guzzomi Jie Pan

Thrust bearings play a vital role in propulsion systems. They rely on a thin layer of oil being trapped between rotating surfaces to produce a low friction interface. The "quality" of this bearing affects many things from noise transmission to the ultimate catastrophic failure of the bearing itself. As a result, the direct measure of the forces and vibrations within the oil filled interface wou...

Journal: :Journal of the Franklin Institute 1858

2012
Sol - Kil Oh Hye - Jin Lee Jung - Han Song Kyoung - Tae Kim Jong - Ho Kim

This paper deals with a novel technique for the fabrication of Spiral grooves in a dynamic thrust bearing. The main scheme proposed in this paper is to fabricate the microgrooves using desktop forming system. This process has advantages compared to the conventional electro-chemical machining in the viewpoint of a higher productivity. For this reason, a new testing apparatus is designed and buil...

2014
F. Nishiwaki R. Matsuzaki S. Muramatsu

This paper presents the experimental research into high mechanical efficiency at thrust bearings of low-side scroll compressors for air conditioners with the new refrigerant R407C and Polyolester (POE) lubricant. In order to examine the friction loss at the thrust bearing under a test condition which is close to the actual running condition of compressors, the authors developed a friction test ...

Journal: :The Review of scientific instruments 2013
Cheol Hoon Park Sang Kyu Choi Doo Euy Hong Tae Gwang Yoon Sung Hwi Lee

This Note proposes a novel radial-thrust combo metal mesh foil bearing (MMFB). Although MMFBs have advantages such as higher stiffness and damping over conventional air foil bearings, studies related to MMFBs have been limited to radial MMFBs. The novel combo MMFB is composed of a radial top foil, thrust top foils, and a ring-shaped metal mesh damper--fabricated by compressing a copper wire mes...

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