Performance Valuation of Externally Pressuried Gas Bearing with Slot Restrictor Arranged for Axial Direction

2017 ◽  
Vol 2017.92 (0) ◽  
pp. M403
Author(s):  
Masaya NAKATSUKA ◽  
Tomohiko ISE ◽  
Kohei NAGAO ◽  
Toshihiko ASAMI ◽  
Tomoya KINUGAWA ◽  
...  
Keyword(s):  
Axial Direction ◽  
Performance Valuation ◽  
Gas Bearing

scholarly journals Effects of Surface Waviness on the Nonlinear Vibration of Gas Lubricated Bearing-Rotor System

2018 ◽  
Vol 2018 ◽  
pp. 1-16
Author(s):  
Jian Li ◽  
Shaoqi Yang ◽  
Xiaoming Li ◽  
Qing Li
Keyword(s):  
Nonlinear Dynamic ◽  
Dynamic Performance ◽  
Engineering Application ◽  
Axial Direction ◽  
Rotor System ◽  
Circumferential Direction ◽  
Coupled Vibration ◽  
Surface Waviness ◽  
The Stability ◽  
Gas Bearing

This paper presents the effects of the surface waviness on the nonlinear dynamic performance of a gas bearing-rotor system. The coupled vibration with the elastomer is taken into consideration to fit the actual engineering application. The effects of the directions, the amplitudes, and the numbers of waves to the nonlinear dynamic performance are investigated. The results show that the existence of the surface waviness in the circumferential direction can improve the stability of the system obviously. But the surface waviness in the axial direction is damage to the system. The nonlinear dynamic performance of the system is insensitive to the number of surface waviness. The increase of the amplitude of the waviness in circumferential direction can improve the stability of the system.

Development of Externally Pressuried Gas Bearing with Slot Restrictor Arranged for Axial Direction

2016 ◽  
Vol 2016.16 (0) ◽  
pp. C3-2
Author(s):  
Masaya NAKATSUKA ◽  
Tomohiko ISE ◽  
Toshihiko ASAMI ◽  
Kazuhiko NISHIMURA ◽  
Tomoya KINUGAWA
Keyword(s):  
Axial Direction ◽  
Gas Bearing

scholarly journals Experimental Study on Damage and Gas Migration Characteristics of Gas-Bearing Coal with Different Pore Structures under Sorption-Sudden Unloading of Methane

Geofluids ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Gang Wang ◽  
Yangyang Guo ◽  
Chang’ang Du ◽  
Lulu Sun ◽  
Zhiyuan Liu ◽  
...  
Keyword(s):  
Axial Strain ◽  
Radial Strain ◽  
Axial Direction ◽  
Gas Migration ◽  
Pore Structures ◽  
Gas Seepage ◽  
Experimental Apparatus ◽  
Methane Sorption ◽  
Seepage Characteristics ◽  
Gas Bearing

Coal and gas outburst is one of the most serious hazards in underground mine operations. In this paper, we explored the damage and gas seepage characteristics of gas-bearing coal samples with different pore structures under methane sorption-sudden unloading conditions using a self-developed experimental apparatus. The results show that (1) the deformation of coal samples can be divided into three stages, namely, pressure-increase-induced compression, sorption-induced expansion, and sudden-unloading-induced deformation or failure stage; (2) with the increase of the number of diffusion pores in the coal sample, the amount of gas sorption gradually increases and the expansion and failure of coal samples become more obvious; (3) in the experiment, the damage of coal samples is mainly along the axial direction and rarely along the radial direction; (4) the radial strain is always greater than the axial strain.

208 Basic Characteristic Measurement of Hydrostatic Gas Bearing with Slot Restrictor Arranged for Axial Direction

2016 ◽  
Vol 2016.65 (0) ◽  
pp. _208-1_-_208-2_
Author(s):  
Masaya Nakatsuka ◽  
Tomohiko Ise ◽  
Toshihiko Asami ◽  
Kazuhiko Nishimura ◽  
Tomoya Kinugawa
Keyword(s):  
Basic Characteristic ◽  
Axial Direction ◽  
Gas Bearing ◽  
Characteristic Measurement

Enhancement of Heat Transfer in a Short Rectangular Channel with Substantial Deflection of Inlet Velocity from Axial Direction

2005 ◽  
Vol 36 (4) ◽  
pp. 311-318 ◽  
Author(s):  
R. Bunker ◽  
M. YA. Belen'kii ◽  
M. A. Gotovskii ◽  
B. S. Fokin ◽  
S. A. Isaev
Keyword(s):  
Heat Transfer ◽  
Rectangular Channel ◽  
Axial Direction ◽  
Enhancement Of Heat Transfer ◽  
Inlet Velocity

Use of Destressing Drilling to Ensure Safety of Donbass Gas-bearing Coal Seams Extraction

2019 ◽  
pp. 7-11
Author(s):  
V.S. Brigida ◽  
◽  
Yu.V. Dmitrak ◽  
O.Z. Gabaraev ◽  
V.I. Golik ◽  
...  
Keyword(s):  
Coal Seams ◽  
Gas Bearing
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