摘要:

Two sulfides, AsSbS4, and AsAsS4were prepared by aqueous precipitation methods. Property studies covered lubricant characteristics, and comparisons were made with As2S3, As2S3, Sb2S3and Sb2S3. The various compounds were examined as chemical addition agents for diester lubricating grease and organic resin solid film lubricants. Details are presented for lubricant formulation and preparation, as well as laboratory test methods. The single most significant result is the dual response of AsSbS4to steel-steel and steel-molybdenum. Previous studies have shown that sulfur compounds as a class are preferential lubricants for molybdenum; however, a lubricating effect for steel by metallic sulfides has been essentially limited to MoS2.Presented at the ASLE Annual Meeting in Cleveland, May 6–9, 1968.

ISSN:0569-8197    

DOI:10.1080/05698196808972231

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

摘要:

The geometry, kinematics, dynamics, and fatigue life of a thrust-loaded, angular-contact, ball bearing are investigated considering the inertial effects of hollow balls at shaft speeds corresponding 1 to 3 million Ndm. The data presented show the variation in these parameters and indicate that the effectiveness of hollow balls is governed by the combined condition of speed and axial load rather than speed alone.Presented at the 23rd ASLE Annual Meeting in Cleveland, May 6–9, 1968.

ISSN:0569-8197    

DOI:10.1080/05698196808972232

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

摘要:

The many methods of analysis, which may be used in the detection of impurities in solid lubricants, can generally be classified as either quantitative or qualitative. Because of the limitations inherent in each, both quantitative and qualitative methods are usually necessary to determine the type and relative amounts of impurities in any sample. The technique which the authors have found most useful is a combined analysis of the complementary thermo-gravimetric and X-ray diffraction data. Other methods which have been useful in special cases include X-ray emission and quantitative chemical analysis. Examples are given of the impurity detection in several different lubricant samples.Presented at the ASLE Annual Meeting in Cleveland, May 6–9, 1968.

ISSN:0569-8197    

DOI:10.1080/05698196808972233

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

摘要:

Radial face seals generally speaking operate under full hydrodynamic lubricating conditions, but the mechanism of lubrication is not completely understood. In a primarily experimental investigation the author has attempted to establish a description of the basic lubricating mechanism in radial face seals. The experimental apparatus and measuring techniques are briefly described.

ISSN:0569-8197    

DOI:10.1080/05698196808972234

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

摘要:

A new theory is developed that predicts the sealing coefficient and the friction factor of a viscoseal under turbulent flow conditions. This theory, being a synthesis of Boon and Tal's laminar viscoseal theory and Ng, Pan, and Elrod's turbulent lubrication theory, shows very satisfactory correlation with available experimental data. The results have been given in simplified formulas such that they are readily usable for design purposes. At high Reynolds numbers the seal geometry has been optimized, although performance near the optimum is rather constant for rather different values of the geometrical parameters. Existing theories on the turbulent behavior of the viscoseal are briefly discussed.Presented at the 23rd ASLE Annual Meeting in Cleveland, May 6–9, 1968.

ISSN:0569-8197    

DOI:10.1080/05698196808972235

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

摘要:

This study deals with the development of a design system for evaluation of the significant parameters which optimize the performance of gear units for surface durability. A double reduction unit is considered for illustration. The results show the feasibility of automated design procedures for gear systems with regard to pitting, scoring, and wear.Presented at the ASLE Annual Meeting in Cleveland, May 6–9, 1968.

ISSN:0569-8197    

DOI:10.1080/05698196808972236

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

摘要:

A special apparatus designed for the evaluation of high temperature lubricants in 20 mm bore ball bearings is described. The results of bearing runs at temperatures up to 1500 F in air are reported. Of the greases evaluated, a fluorocarbon grease, provided bearing lubrication for longer times at 450 and 600 F than either polyphenyl ether or silicone greases thickened with dyes and/or MoS2. Cobalt alloy ball bearings, lubricated either with barium fluoride-calcium fluoride coatings bonded to the cages or with porous metal cages impregnated with these fluorides, ran successfully at 1200 and 1500 F under a thrust load of 30 pounds and at a shaft speed of 5000 rpm.Presented at the ASLE Annual Meeting in Cleveland, May 6–9, 1968.

ISSN:0569-8197    

DOI:10.1080/05698196808972237

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

摘要:

The increased sophistication of hydraulic systems along with the advancement of elastohydrodynamics and high pressure metal forming techniques has created a need for more complete bulk moduli and P-V-T data. By correlation of the available data on silicones, a generalized relationship for this class of fluids is determined for bulk modulus as a function of pressure, temperature, and density of the fluid at atmospheric pressure and 77F. Thus, density and bulk modulus for most silicone fluids may be predicted at temperatures from 32F to 400F and pressures up to 500,000 psig. For most silicone fluids only the density at atmospheric pressure and 77F is needed beforehand. A few exceptions are listed for which the correlation is applicable with minor modifications. The average deviation of the predicted values of bulk moduli from the experimental data is 1%.Presented at the 23rd ASLE Annual Meeting in Cleveland, May 6–9, 1968.

ISSN:0569-8197    

DOI:10.1080/05698196808972238

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

摘要:

For evaluating the lubricating qualities of jet fuels, the ball-on-cylinder device appears to be particularly suitable. It can operate at low enough loads so that subtle differences in fuel quality can be detected. Examples are given of the effect of refining, the differences in additive action, the importance of test atmosphere, and the influence of temperature. Other test methods appear to be too severe for all-around fuels testing.Presented at the 23rd ASLE Annual Meeting in Cleveland, May 6–9, 1968.

ISSN:0569-8197    

DOI:10.1080/05698196808972239

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor