Discussion: “Analysis of Forces at the Pivot Bearing of a Compound Pendulum” (Samson, A., 1972, ASME J. Appl. Mech., 39, pp. 235–243)

1972 ◽  
Vol 39 (3) ◽  
pp. 856-856
Author(s):  
S. Doughty
Keyword(s):  
Pivot Bearing

Alumina Ceramic and Polyethylene: Materials for the Double Pivot Bearing System of an Implantable Centrifugal Ventricular Assist Device

1998 ◽  
pp. 139-147 ◽  
Author(s):  
Yoshiyuki Takami ◽  
Tadashi Nakazawa ◽  
Kenzo Makinouchi ◽  
Julie Glueck ◽  
Robert Benkowski ◽  
...  
Keyword(s):  
Ventricular Assist Device ◽  
Alumina Ceramic ◽  
Assist Device ◽  
Ventricular Assist ◽  
Pivot Bearing ◽  
Bearing System

scholarly journals The Effect of the Pivot Stiffness on the Performances of Five-Pad Tilting Pad Bearings

Lubricants ◽  
2019 ◽  
Vol 7 (7) ◽  
pp. 61 ◽  
Author(s):  
Phuoc Vinh Dang ◽  
Steven Chatterton ◽  
Paolo Pennacchi
Keyword(s):  
Excitation Frequency ◽  
Experimental Results ◽  
Dynamic Force ◽  
Dynamic Coefficients ◽  
Pivot Bearing ◽  
Tilting Pad ◽  
In Series ◽  
Stiffness And Damping ◽  
Tilting Pad Journal Bearings

The role of the pivot flexibility in tilting-pad journal bearings (TPJBs) has become essential, particularly for bearings working at high applied load and relatively high rotor speeds. Predictions from a simple bearing model with rigid pivots show incorrect estimation of the dynamic coefficients in comparison with the experimental results. Normally, the more flexible the pad pivot, the lower the dynamic coefficients because the stiffness of the pivot takes in series with the stiffness and damping of the oil film. This paper investigates the influence of pivot stiffness on the dynamic force coefficients of two different five-pad TPJBs as a function of the applied static load and excitation frequency: rocker-backed pivot and spherical pivot bearings. In order to highlight the effect of the pivot stiffness in the spherical pivot bearing, displacement restriction components and elastic copper made shims have been used. Firstly, a thermo-elasto-hydrodynamic model for the static and dynamic characteristics of the two bearings is described. This model takes into account the flexibility of both pad and pivot. The pivot stiffnesses calculated by means of the Hertz theory and those obtained by experiments have been introduced and compared in the model. The clearance profiles of two tested bearing and the shaft center loci obtained by measurement and prediction are also shown. The dynamic coefficients of the two bearings obtained from the numerical simulation were compared with the experimental results. By the analysis it can be concluded that the effect of the pivot flexibility on the clearance profile, the shaft locus and on the dynamic coefficients is very significant. More important, it is important to estimate the pivot stiffness of each single pad using experimental measurements.

Hemolytic Characteristics of a Pivot Bearing Supported Gyro Centrifugal Pump (C1E3) Simulating Various Clinical Applications

1996 ◽  
Vol 20 (9) ◽  
pp. 1042-1049 ◽  
Author(s):  
Yoshiyuki Takami ◽  
Kenzo Makinouchi ◽  
Tadashi Nakazawa ◽  
Robert Benkowski ◽  
Julie Glueck ◽  
...  
Keyword(s):  
Centrifugal Pump ◽  
Clinical Applications ◽  
Pivot Bearing

Flow Visualization of a Centrifugal Blood Pump with Double Pivot Bearing

2002 ◽  
Vol 2002 (0) ◽  
pp. 183-184
Author(s):  
Takayuki KODAMA ◽  
Takashi YAMANE ◽  
Hiroshi KAWAMURA ◽  
Yoshiro YAMAMOTO ◽  
Toshiyuki SHINOHARA
Keyword(s):  
Flow Visualization ◽  
Blood Pump ◽  
Centrifugal Blood Pump ◽  
Pivot Bearing

Implantable Centrifugal Blood Pump With Dual Impeller and Double Pivot Bearing System: Electromechanical Actuator, Prototyping, and Anatomical Studies

2011 ◽  
Vol 35 (5) ◽  
pp. 437-442 ◽  
Author(s):  
Eduardo Bock ◽  
Pedro Antunes ◽  
Tarcisio Leao ◽  
Beatriz Uebelhart ◽  
Jeison Fonseca ◽  
...  
Keyword(s):  
Blood Pump ◽  
Centrifugal Blood Pump ◽  
Anatomical Studies ◽  
Electromechanical Actuator ◽  
Pivot Bearing ◽  
Bearing System

Three-Phase Electrostatic Rotary Stepper Micromotor With a Flexural Pivot Bearing

2010 ◽  
Vol 19 (2) ◽  
pp. 338-349 ◽  
Author(s):  
Edin Sarajlic ◽  
Christophe Yamahata ◽  
Mauricio Cordero ◽  
Hiroyuki Fujita
Keyword(s):  
Three Phase ◽  
Pivot Bearing

Development of a Pivot Bearing Supported Sealless Centrifugal Pump for Ventricular Assist

1996 ◽  
Vol 20 (5) ◽  
pp. 485-490 ◽  
Author(s):  
Tadashi Nakazawa ◽  
Kenzo Makinouchi ◽  
Yasuhisa Ohara ◽  
Satoshi Ohtsubo ◽  
Koji Kawahito ◽  
...  
Keyword(s):  
Centrifugal Pump ◽  
Ventricular Assist ◽  
Pivot Bearing
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