Evaluation of Ultra High Speed Micro Traction Drive

2005 ◽  
Author(s):  
Yasuyoshi Tozaki ◽  
Akihiko Umeda ◽  
Takeshi Yoshimi ◽  
Isamu Shiotsu ◽  
Hiroyuki Sonobe ◽  
...  
Keyword(s):  
Driving Force ◽  
High Speed ◽  
Ball Bearing ◽  
Reduction Ratio ◽  
Traction Drive ◽  
Measurement Temperature ◽  
Input Shaft ◽  
Ultra High Speed ◽  
Rolling Element ◽  
Type Test

Micro traction drive is a device to transmit driving force modified from angular ball bearing. The micro traction drive consists of an input/inner ring, an outer ring, a rolling element, a retainer/output shaft, and a casing. In addition, the micro traction drive of the tandem type that combined two bearings was developed to obtain a big reduction ratio. As a result, we are able to attain the reduction ratio 7.3. Traction oil on the market was sealed in the test piece for oil bath lubrication. Input shaft could be driven with a motor in ultra high speed. Power absorbing type test equipment was made the efficiency and temperature of micro traction drive operated at high speed were successfully measured. In the result of measurement, temperature rise are a few and it turns out a micro traction drive can be used by ultra high-speed.

scholarly journals Study on high-speed traction drive CVT for aircraft power generation - Gyroscopic effect of the thrust ball bearing on the CVT -

2017 ◽  
Vol 11 (6) ◽  
pp. JAMDSM0087-JAMDSM0087 ◽  
Author(s):  
Kippei MATSUDA ◽  
Tatsuhiko GOI ◽  
Kenichiro TANAKA ◽  
Hideyuki IMAI ◽  
Hirohisa TANAKA ◽  
...  
Keyword(s):  
Power Generation ◽  
High Speed ◽  
Ball Bearing ◽  
Gyroscopic Effect ◽  
Traction Drive

scholarly journals Development of High Speed Rotation Micro Traction Drive Modified from Angular Ball Bearing (1st Report, Experimental Manufacture and Evaluation)

2006 ◽  
Vol 72 (716) ◽  
pp. 1337-1344 ◽  
Author(s):  
Isauu SIOTSU ◽  
Susumu MATSUMOTO ◽  
Yasuyoshi TOZAKI ◽  
Takeshi YOSHIMI ◽  
Akihiko UMEDA ◽  
...  
Keyword(s):  
High Speed ◽  
Ball Bearing ◽  
Traction Drive ◽  
High Speed Rotation ◽  
Speed Rotation

Research on Numerical Problem in the Simulation Statics Analysis Program of High Speed Ball Bearing

2013 ◽  
Vol 376 ◽  
pp. 248-252
Author(s):  
Ming Yan ◽  
Ming Ming Wang ◽  
Xiang Jun Zhu
Keyword(s):  
Contact Angle ◽  
Fatigue Life ◽  
Load Distribution ◽  
High Speed ◽  
Ball Bearing ◽  
Theoretical Research ◽  
Analysis Program ◽  
Numerical Problem ◽  
Rolling Element

Load distribution, contact angle, rotate speed of rolling element, support stiffness of bearing, fatigue life and other aggregative indicators are got through the simulation statics analysis program of high speed ball bearing. Consequently, it is widely used in the engineering field. The domestic thesis about the simulation statics analysis program of the high speed ball bearing is barely reported, and most of the theoretical research thesis are not specific and have some mistakes. Consequently, aim for programming about a practical suit of the simulation statics analysis program of ball bearing, and the certain numerical problems are studied in the procedure of program.

Performance Evaluation of Innovative Micro-Traction-Drive-Utilized Angular-Contact Bearing

2005 ◽  
Vol 128 (2) ◽  
pp. 262-266 ◽  
Author(s):  
Yasuyoshi Tozaki ◽  
Akihiko Umeda ◽  
Hiroyuki Sonobe ◽  
Susumu Matsumoto ◽  
Takeshi Yoshimi ◽  
...  
Keyword(s):  
High Speed ◽  
Ball Bearing ◽  
Contact Point ◽  
Planetary Gear ◽  
Test Equipment ◽  
Superior Performance ◽  
Small Scale ◽  
Outer Diameter ◽  
Traction Drive ◽  
Oil Film

Traction drive makes oil film between two rollers, and power is transmitted by oil film shearing. It has the following characteristics. (1) Traction drive can be operated at low level of vibration and noise, so they are more suitable at higher speed rotations than gear. (2) Traction drive can change continuously the distance from the contact point of the rotating part to the axis of rotation; it is useful in continuously variable transmission (CVT). Generally-fixed-reduction-ratio-type traction drive is developed for the purpose of use by high-speed rotation taking advantage of the feature of characteristic (1). On the other hand, the authors have developed a micro drive system for transmission; a micro-traction-drive based on the structure of an angular ball bearing is advantageous over geared speed reducers, for small scale equipment requiring high numbers of revolutions. A micro-traction-drive is easily manufactured by modifying angular bearings and tapered roller bearings for which preload inner race and outer race act as thrust force. The driving force is transmitted by the contact of the retainer with the rolling element in the rotating direction. The test of the experimental model of micro-traction-drive using an angular ball bearing of 10mm inner diameter, 30mm outer diameter, and 9mm width was carried out. Power-absorbing-type test equipment was made and the input and output torque, number of revolutions, temperature, noise, and state of lubrication were measured. With the same test equipment, the micro-traction-drive was compared to the equivalent type planetary gear with outer diameter of 32mm on the market. In comparison with commercially available speed reducers, the planetary gear system, the newly developed micro-traction was found to bear superior performance in terms of allowable transmission torque, efficiency, noise, and other characteristics.

scholarly journals The Series Hybrid Bearing—A New High Speed Bearing Concept

1972 ◽  
Vol 94 (2) ◽  
pp. 117-122 ◽  
Author(s):  
W. J. Anderson ◽  
D. P. Fleming ◽  
R. J. Parker
Keyword(s):  
Fatigue Life ◽  
High Speed ◽  
Ball Bearing ◽  
Rolling Element Bearing ◽  
Speed Ratio ◽  
Shaft Speed ◽  
Rolling Element ◽  
Element Bearing ◽  
Hybrid Bearing ◽  
Inner Race

The series-hybrid bearing couples a fluid-film bearing with a rolling-element bearing such that the rolling-element bearing inner race runs at a fraction of shaft speed. A series-hybrid bearing was analyzed and experiments were run at thrust loads from 100 to 300 lb and speeds from 4000 to 30,000 rpm. Agreement between theoretical and experimental speed sharing was good. The lowest speed ratio (ratio of ball bearing inner-race speed to shaft speed) obtained was 0.67. This corresponds to an approximate reduction in DN value of 1/3. For a ball bearing in a 3 million DN application, fatigue life would theoretically be improved by a factor as great as 8.

A High-Speed Rolling-Element Bearing Loss Investigation

1978 ◽  
Vol 100 (1) ◽  
pp. 40-45 ◽  
Author(s):  
R. J. Trippett
Keyword(s):  
Power Loss ◽  
High Speed ◽  
Ball Bearing ◽  
Rolling Element Bearing ◽  
Ball Bearings ◽  
Lubricant Flow ◽  
Deep Groove ◽  
Rolling Element ◽  
Rotor Support ◽  
Bearing Loss

Little experimental data for losses of high-speed Conrad type ball bearings is presently found in the open literature. Hence the accuracy of published high-speed bearing-loss predictions is not known. Accurate predictions of high-speed ball bearing loss are important, however, in evaluating high-speed rotor support systems as well as determining cooling oil requirements for this type of bearing. The losses of a Conrad type ball bearing used to support the high-speed rotors in a vehicular gas turbine were measured. The effects of bearing axial load, rotor speed, lubricant viscosity, and lubricant flow rate on the bearing power consumption were determined. Power loss calculations, made from previously published equations for this type of bearing, did not correlate well with the measured high-speed bearing losses. New power loss equations are presented to predict the losses associated with high-speed deep-groove Conrad type ball bearings under well lubricated conditions.

scholarly journals Evaluation of Electron-Beam Welded Hollow Balls for High-Speed Ball Bearings

1971 ◽  
Vol 93 (1) ◽  
pp. 47-55 ◽  
Author(s):  
Harold H. Coe ◽  
Richard J. Parker ◽  
Herbert W. Scibbe
Keyword(s):  
Fatigue Life ◽  
High Speed ◽  
Ball Bearing ◽  
Similar Data ◽  
Ball Bearings ◽  
Outer Race ◽  
Rolling Element ◽  
Solid Ball ◽  
Steel Balls ◽  
Weld Area

An experimental investigation was performed with two series (115 and 215) of 75 mm bore ball bearings using hollow balls as the rolling elements. The bearings were tested at 500 and 1000 pounds thrust loads at shaft speeds up to 24000 rpm. The 115 series bearings with 1/2-in. SAE 52100 steel balls showed very little difference in torque, outer-race temperature, or rolling-element fatigue life when compared to similar data for a solid ball bearing. The 215 series bearings with 11/16-in. AISI M-50 steel balls showed only slight differences in torque and outer-race temperature but a very significant decrease in rolling-element fatigue life compared to a solid ball bearing. The balls failed in flexure fatigue, due to a stress concentration in the weld area.

Ball bearing turbocharger vibration management: application on high speed balancer

2020 ◽  
Vol 21 (6) ◽  
pp. 619
Author(s):  
Kostandin Gjika ◽  
Antoine Costeux ◽  
Gerry LaRue ◽  
John Wilson
Keyword(s):  
Dynamic Behavior ◽  
High Speed ◽  
Internal Combustion Engines ◽  
Ball Bearing ◽  
Squeeze Film ◽  
Design And Technology ◽  
Squeeze Film Damper ◽  
Damping Coefficients ◽  
Bearing Loads ◽  
Stiffness And Damping

Today's modern internal combustion engines are increasingly focused on downsizing, high fuel efficiency and low emissions, which requires appropriate design and technology of turbocharger bearing systems. Automotive turbochargers operate faster and with strong engine excitation; vibration management is becoming a challenge and manufacturers are increasingly focusing on the design of low vibration and high-performance balancing technology. This paper discusses the synchronous vibration management of the ball bearing cartridge turbocharger on high-speed balancer and it is a continuation of papers [1–3]. In a first step, the synchronous rotordynamics behavior is identified. A prediction code is developed to calculate the static and dynamic performance of “ball bearing cartridge-squeeze film damper”. The dynamic behavior of balls is modeled by a spring with stiffness calculated from Tedric Harris formulas and the damping is considered null. The squeeze film damper model is derived from the Osborne Reynolds equation for incompressible and synchronous fluid loading; the stiffness and damping coefficients are calculated assuming that the bearing is infinitely short, and the oil film pressure is modeled as a cavitated π film model. The stiffness and damping coefficients are integrated on a rotordynamics code and the bearing loads are calculated by converging with the bearing eccentricity ratio. In a second step, a finite element structural dynamics model is built for the system “turbocharger housing-high speed balancer fixture” and validated by experimental frequency response functions. In the last step, the rotating dynamic bearing loads on the squeeze film damper are coupled with transfer functions and the vibration on the housings is predicted. The vibration response under single and multi-plane unbalances correlates very well with test data from turbocharger unbalance masters. The prediction model allows a thorough understanding of ball bearing turbocharger vibration on a high speed balancer, thus optimizing the dynamic behavior of the “turbocharger-high speed balancer” structural system for better rotordynamics performance identification and selection of the appropriate balancing process at the development stage of the turbocharger.

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