摘要:

Three magnetic fluid seals custom engineered to meet specific application objectives are discussed. These seals are: a belt edge seal, a large diameter seal and a centrifugal seal. Extensive experimental data were acquired on the first two seals to determine their performance characteristics. Some of these test results are compared with the theoretical expectations. Numerical computations are made on the centrifugal seal to Predict its sealing capabilites.Presented at the 34th Annual Meeting in St. Louis, Missouri, April 30-May 3, 1979

ISSN:0569-8197    

DOI:10.1080/05698198008982987

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

The stability thresholds of four basic journal bearing types are found. Increasing groove size (up to 90°) is found to exert a strong destabilizing effect. Increasing aspect ratio (L/D) also has a destabilizing effect. The stability of each type was found to improve progressively with preload.

ISSN:0569-8197    

DOI:10.1080/05698198008982988

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

The disk-scraper mechanism is commonly used in self-contained journal bearings as a lubricator. Two types cf fixed clearance scrapers and a floating plow-type scraper were investigated experimentally. The effects of speed, viscosity, clearances and immersion on flow were found by systematic variation.

ISSN:0569-8197    

DOI:10.1080/05698198008982989

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

Sliding tests have been carried out using a variety of soft metal and nonmetal pins on a rotating steel disk at speeds up to 150 m/s. A new high-speed friction apparatus in which the normal force, the friction force and the friction coefficient are recorded, was used. In general, the wear rate increased drastically, and the friction coefficient decreased moderately as the sliding speed was raised, these changes being especially pronounced when pin materials of low melting temperature were used. The friction data are in good agreement with those obtained by others using the pin-on-disk geometry. However, although in many cases the interface reached the melting temperature of the lower melting sliding material, the very low friction coefficient values of under 0.05 reported by some investigators were not reached.Presented at the 34th Annual Meeting in St. Louis, Missouri, April 30-May 3, 1979

ISSN:0569-8197    

DOI:10.1080/05698198008982990

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

Sliding friction experiments were conducted with various metals and iron-base binary alloys (alloying elements Ti, Cr, Mn, Ni, Rh, and W) in contact with single-crystal silicon carbide riders. Results indicate that the coefficient of friction and groove height (corresponding to the wear volume) decrease linearly as the shear strength of the bulk metal increases. The coefficient of friction and groove height generally decrease with an increase in solute content of binary alloys. A separate correlation exists between the solute to iron atomic radius ratio and the decreasing rates of change of coefficient of friction and groove height with increasing solute content. These rates of change ate minimum at a solute to iron radius ratio of unity. They increase as the atomic radius ratio increases or decreases linearly from unity. The correlations indicate that atomic size is an important parameter in controlling friction and wear of alloys.Presented as an American Society of Lubrication Engineers paper at the ASLE/ASME Lubrication Conference in Dayton, Ohio, October 16—18, 1979

ISSN:0569-8197    

DOI:10.1080/05698198008982991

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor