Evaluation of Friction Torque for a Turbopump Ball Bearing
نویسندگان
چکیده
منابع مشابه
Comparison of rotational speeds and torque properties between air-bearing and ball-bearing air-turbine handpieces.
We examined the effects of air pressure on the free-running speed of air-bearing and torque-type ball-bearing air-turbine handpieces. The air pressure for the former should be kept at a certain high level to maintain the stable super-thin air-bearing film and to provide the quasi-constant speed of around 420,000 to 480,000 rpm. On the other hand, the air pressure for the latter could be adjuste...
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In some applications, especially for the attitude control of navigation system, the friction moment of instrument ball bearings is one of the much more important factors. Its magnitude and fluctuation affect not only the energy transfer but also the accuracy of signal transfer even though the bearings work at very low speed. Experimental analysis showed that the cage rotated with a minor fluctu...
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The discovery/invention of the ball-bearing motor is attributed to Milroy [1]. It has been discussed several times, with conflicting explanations [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]. This solution is a much simplified version of that given in [7]. Because the motor is weak, it is helpful to reduce friction on the axle by connecting the high-current lead to the outer races of the ba...
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ژورنال
عنوان ژورنال: Journal of the Korean Society of Tribologists and Lubrication Engineers
سال: 2011
ISSN: 1229-4845
DOI: 10.9725/kstle.2011.27.1.025