Viscous pump for highly backdrivable Electro-Hydrostatic Actuator

2012 ◽  
Author(s):  
Hiroshi Kaminaga ◽  
Hirokazu Tanaka ◽  
Kazuki Yasuda ◽  
Yoshihiko Nakamura
Keyword(s):  
Viscous Pump

Experimental study of the viscous pump with a helical channel rotor: Torsion effect of the channel

2010 ◽  
Vol 19 (2) ◽  
pp. 154-159
Author(s):  
Yasutaka Hayamizu ◽  
Kyoji Yamamoto ◽  
Shinichiro Yanase ◽  
Toru Hyakutake ◽  
Shinichi Morita ◽  
...  
Keyword(s):  
Experimental Study ◽  
Helical Channel ◽  
Torsion Effect ◽  
Viscous Pump

The Optimum Groove Geometry for Spiral Groove Viscous Pumps

1990 ◽  
Vol 112 (2) ◽  
pp. 409-414 ◽  
Author(s):  
Yuichi Sato ◽  
Kyosuke Ono ◽  
Akihiko Iwama
Keyword(s):  
Differential Equation ◽  
Flow Rate ◽  
Groove Width ◽  
Design Parameters ◽  
Width Ratio ◽  
Maximum Pressure ◽  
Spiral Groove ◽  
Clearance Ratio ◽  
Viscous Pump ◽  
Outflow Rate

The optimum geometries of disk and cylindrical sprial groove viscous pumps to provide the maximum pressure or flow rate are investigated theoretically. The geometrical design parameters, such as the groove angle, groove to ridge clearance ratio, groove width ratio and ridge clearance ratio, are considered as functions of meridional coordinate. Results are obtained from the solution of a differential equation for the smoothed overall pressure distribution of a spiral groove viscous pump. It is found that outflow rate increases with the increase of groove to ridge clearance ratio λ, and that for each value of λ there exist “optimum” values of groove angle and groove width ratio, which give a maximum outflow rate. However, the increase of λ decreases the ridge clearance.

Steady dynamical behaviors of novel viscous pump with groove under the rotor

2014 ◽  
Vol 73 ◽  
pp. 170-176 ◽  
Author(s):  
Jianfeng Lu ◽  
Jing Ding ◽  
Jianping Yang ◽  
Xiaoxi Yang
Keyword(s):  
Dynamical Behaviors ◽  
Viscous Pump

Viscous pumps: Comparative assessment of effectiveness

2003 ◽  
Vol 217 (2) ◽  
pp. 167-174 ◽  
Author(s):  
H. A. Arafa ◽  
T. A. Osman
Keyword(s):  
Experimental Test ◽  
Comparative Effectiveness ◽  
Comparative Assessment ◽  
Dimensionless Number ◽  
Test Results ◽  
Sufficient Data ◽  
Design Engineers ◽  
Viscous Pump

A classification of the different viscous pump embodiments and a survey of the application areas are made. A dimensionless number is newly introduced here, and it is suggested that this be used in evaluating the comparative effectiveness of viscous pumps of different configurations. The effectiveness is evaluated for viscous pumping devices developed over the last four decades and for which sufficient data and experimental test results are available. It is shown that these pumps could be broadly categorized into effective and much less effective types. An enumeration of possible design pitfalls is given for the latter types. The findings of the present paper are deemed useful to design engineers in their endeavour to assess the effectiveness of existing viscous pumps and in developing new ones.

Lubrication Analysis of a Rolling Piston Rotary Compressor: Part 1: Mathematical Modelling

1994 ◽  
Vol 208 (2) ◽  
pp. 83-94 ◽  
Author(s):  
S K Padhy
Keyword(s):  
Mathematical Model ◽  
Mathematical Modelling ◽  
Rotary Compressor ◽  
Lubrication System ◽  
Pipe Network ◽  
Lubricant Flow ◽  
Viscous Pump ◽  
Rolling Piston ◽  
Closed Network ◽  
Flow Resistances

This paper describes a mathematical model for the lubrication system of a single-vane rolling piston type rotary compressor. The lubricant flow in the compressor is modelled as a flow in a pipe network. Various flow resistances, pressure differentials and viscous pump effects are determined. Closed network equations are formulated. The equations are solved simultaneously, and the lubricant flowrates at various clearances of the compressor are calculated.

A viscous pump bioreactor

1990 ◽  
Vol 36 (8) ◽  
pp. 771-777 ◽  
Author(s):  
S. J. Kleis ◽  
S. Schreck ◽  
R. M. Nerem
Keyword(s):  
Viscous Pump
Sign in / Sign up

Export Citation Format

Share Document