Theoretical and experimental study on the cavitation mechanism of a low viscosity spiral oil wedge journal bearing

2014 ◽  
Vol 228 (9) ◽  
pp. 947-954 ◽  
Author(s):  
Li-Li Wang ◽  
Chang-Hou Lu ◽  
Pei-Qi Ge
Keyword(s):  
Experimental Study ◽  
Journal Bearing ◽  
Low Viscosity

scholarly journals Pivoted-Pad Journal Gas Bearing Performance in Exploratory Operation of Brayton Cycle Turbocompressor

1968 ◽  
Vol 90 (4) ◽  
pp. 687-696 ◽  
Author(s):  
R. Y. Wong ◽  
W. L. Stewart ◽  
H. E. Rohlik
Keyword(s):  
Experimental Study ◽  
Journal Bearing ◽  
Inert Gas ◽  
Brayton Cycle ◽  
Ambient Conditions ◽  
Operating Characteristics ◽  
The Third ◽  
Loading Device ◽  
Bearing Design ◽  
Gas Bearing

This paper describes findings obtained to date in the area of journal gas bearings from an experimental study of a Brayton cycle turbocompressor designed for the requirements of a two-shaft 10-kw space power system. The journal bearing design utilizes three pads pivoted on conforming balls and sockets. Two of the pivots are rigidly mounted to the frame, and the third pivot is mounted to the frame through a low-spring-rate diaphragm. This paper describes the salient package and bearing design features and then presents the principal results obtained from testing the package in both a spin calibration rig and operation at design temperature conditions with an inert gas. The results discussed include (a) the successful use of a pneumatic loading device to vary pad load during operation, (b) the operating characteristics of the bearings as obtained over a range of pad loads and ambient conditions, (c) structural and dynamic behavior of the bearing-support system during design temperature operation and (d) a discussion of the wear characteristics of the conforming ball-and-socket pivot as obtained from the tests made to date.

MAGNETOREOLOGICAL JOURNAL BEARING: EXPERIMENTAL RESULTS

2020 ◽  
Vol 3 ◽  
pp. 83-90
Author(s):  
A.S. FETISOV ◽  
V.O. TYURIN
Keyword(s):  
Experimental Study ◽  
Journal Bearing ◽  
Experimental Results ◽  
Measuring System ◽  
Information Measuring ◽  
Experimental Stand ◽  
Information Measuring System

The article presents the classification of magnetorheological devices. The classification of bearings of rotor machines is given. An experimental stand is described that includes a magnetorheological journal bearing. The information–measuring system of the experimental stand is presented. The results of experimental study is presented.

Experimental Study on Cavitation Boundary of Journal Bearing

2013 ◽  
Vol 378 ◽  
pp. 362-366
Author(s):  
Ying Yang ◽  
Li Xu ◽  
Wen Qing Liu
Keyword(s):  
Experimental Study ◽  
High Speed ◽  
Journal Bearing ◽  
Theory Model ◽  
Work Characteristics ◽  
Oil Film ◽  
Rotating Speed ◽  
Supply Pressure ◽  
Rupture Area ◽  
Experimental Rig

Under high and super-high speed conditions, oil film of the journal bearing is easy to crack and then becomes cavitation. The existence of cavitation has a great effect on the work characteristics of the bearing. Cavitation boundary of a three-groove journal beaing was investigated on the journal bearing experimental rig. The influences of rotating speed and supply pressure on cavitation boundary were studied. And experimental equations of reformation location and the percent of rupture area are established. The results show that rupture location of oil film is not related with rotating speed and supply pressure, otherwise reformation location of oil film is effected greatly by them. The experimental equations lay foundations for next research on cavitation theory model and stability.

scholarly journals Experimental Study on Instability of Externally Pressurized Air Journal Bearing

1967 ◽  
Vol 33 (250) ◽  
pp. 997-1004 ◽  
Author(s):  
Osamu TANIGUCHI ◽  
Akiyoshi TAMURA ◽  
Kyosuke ONO
Keyword(s):  
Experimental Study ◽  
Journal Bearing

Pressure Drop of Liquid-Liquid Taylor Flow in Mini-Scale Coiled and Curved Tubing

2019 ◽  
Author(s):  
W. Adrugi ◽  
Y. S. Muzychka ◽  
K. Pope
Keyword(s):  
Experimental Study ◽  
Reynolds Number ◽  
Pressure Drop ◽  
Slug Flow ◽  
Silicone Oil ◽  
Radius Of Curvature ◽  
Asymptotic Model ◽  
Dean Number ◽  
Taylor Flow ◽  
Low Viscosity

Abstract This paper presents an experimental study on pressure drop using non-boiling liquid-liquid Taylor flow in mini scale coiled and curved tubing. Experiments were carried out to measure the pressure drop characteristics by varying the numbers of turns in coiled tubes and the lengths of curved tubes of less than one turn, such that Dean number, Reynolds number, radius of curvature, and coil pitch were considered. A set of narrow coiled tubes (ID = 1.59 mm, 1.27 mm, 1.016 mm) was used as test sections with different radii of curvature and overall lengths, and thus a different quantity of turns. Water and 1 cSt low viscosity silicone oil were used to create a segmented slug flow. An asymptotic model is developed based on the experimental results and previous models to predict the pressure drop, based on Dean number and dimensionless slug length. The effects of varying tube curvature and tube diameter are also studied. The results provide new insights into the effect of coiling and secondary flow on pressure drop for a liquid-liquid Taylor flow in mini scale systems.

Experimental Study on the Influencing Factors of Piston Liquid Filling Accuracy

2014 ◽  
Vol 1055 ◽  
pp. 287-292
Author(s):  
Guo Tao Shen ◽  
Bo Wu ◽  
Jun Wan ◽  
Kang Xiang ◽  
Li Qun Chen
Keyword(s):  
Experimental Study ◽  
Experimental Method ◽  
Influencing Factors ◽  
Fluid Velocity ◽  
Orthogonal Test ◽  
Velocity Curve ◽  
Nozzle Diameter ◽  
Low Viscosity ◽  
Filling System ◽  
Speed Range

By using self-designed servo piston liquid filling system, the filling nozzle diameter, the shape of the liquid outlet the irrigation fluid velocity curve, level track distance for filling accuracy to determine optimal filling of the low viscosity liquid parameters are studied using orthogonal experimental method. The experiment results showed that: highest accuracy is got under the nozzle diameter of is 8 mm, the shape of the liquid outlet is straight mouth, the speed of the low-speed range is 55ml / s, the liquid level tracking distance is 0cm.Key words: plunger type; orthogonal test; filling accuracy; optimal filling parameters

MAGNETORHEOLOGICAL JOURNAL BEARING: EXPERIMENTAL STUDY RESULTS

2020 ◽  
Vol 5 ◽  
pp. 98-103
Author(s):  
A.S. FETISOV
Keyword(s):  
Experimental Study ◽  
Journal Bearing ◽  
Experimental Studies ◽  
Frequency Characteristics ◽  
Rotor System ◽  
Measuring System ◽  
Electromagnetic Actuator ◽  
Experimental Stand ◽  
Study Results ◽  
Information Measuring System

The article presents the results of experimental studies of the effect of current power on an electromagnetic actuator of a magnetorheological journal bearing on the amplitude-frequency characteristics of the rotor system. The description of the experimental stand is presented. The description of the information-measuring system is presented.

Sign in / Sign up

Export Citation Format

Share Document