摘要:

The high hardness and excellent high-temperature performance of ceramics are attractive for critical rolling-bearing applications, such as in high-thermal-efficiency engines. In addition, the lower density of ceramics permits lower centrifugal loads, less skidding at high speeds, and, consequently, results in longer bearing component life than conventional bearing steels or alternative super-alloys or cermets. Silicon nitride has the lowest friction and elastic modulus of the available ceramics, which reduce bearing contact stresses. This paper reviews the merits and demerits of silicon nitride as a bearing material, its processing, and different mechanisms for solid-lubricant replenishment in severe environments. Test data and application design guidelines accumulated to dale are also provided.Presented as an American Society of Lubrication Engineers paper at the ASLE/ASME Lubrication Conference in New Orleans, Louisiana, October 5–7, 1981

ISSN:0569-8197    

DOI:10.1080/05698198208983110

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

A simple technique for the rapid design and performance evaluation of steady-state journal bearings is presented. The technique which is amenable to hand calculator use is compared with a numerical solution for all relevant design parameters. Results indicate that the bearing designer may utilize the technique over a wide range of (L/D) and eccentricity ratios without serious error.Presented as an American Society of Lubrication Engineers paper at the ASLE/ASME Lubrication Conference in New Orleans, Louisiana, October 5–7, 1981

ISSN:0569-8197    

DOI:10.1080/05698198208983111

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

The wear of 52100 steel in boundary lubrication condition is controlled by the formation of nonhomogeneous, thin films. When tricresylphosphate is used as an antiwear additive, the buildup of the film is due to a chemical reaction process involving the bearing surface and the lubrication on or near the bearing surface.

ISSN:0569-8197    

DOI:10.1080/05698198208983112

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

In boundary lubrication, the wear process is often controlled by the formation of colloidal agglomerations in the contact. These agglomerations are due to collected products of chemical reactions between metal Surfaces and environment (1). They make a non-homogeneous thin film in the interface. Their accumulation gives rise to the formation of adherent films in the case of antiwear additives (zinc dithiophosphates and organophosphorous compounds).

ISSN:0569-8197    

DOI:10.1080/05698198208983113

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

Thermal exposure experiments at 315° and 350°C were conducted on seven different types of polyimide film to determine which was the most thermally stable and adherent. The polyimides were ranked according to the rate of which they lost weight and how well they adhered to the metallic substrate. Friction and wear experiments were conducted at 25°C (room temperature) on films bonded to 440C HT stainless steel. Friction, film wear rates, wear mechanists, and transfer films of the seven films were investigated and compared. The polyimides were found to fall into two groups as far as friction and wear properties were concerned. Group I had lower friction but an order of magnitude higher film wear rate than did group II. The wear mechanism was predominately adhesive, but the size of the wear particles was larger for group I polyimides.Presented as an American Society of Lubrication Engineers paper at the ASLE/ASME Lubrication Conference in New Orleans, Louisiana, October 5–7, 1981

ISSN:0569-8197    

DOI:10.1080/05698198208983114

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

ISSN:0569-8197    

DOI:10.1080/05698198208983115

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

Experimental results are presented for the sealing and lubricating characteristics of polymeric composites containing ferromagnetic liquids. It is shown that owing to syneresis and the combined properties of selected polymers and liquids, such “magnetic composites” can be used successfully to seal vacuum systems or gases under high pressure.Presented as an American Society of Lubrication Engineers paper at the ASLE/ASME Lubrication Conference in New Orleans, Louisiana, October 5–7, 1981

ISSN:0569-8197    

DOI:10.1080/05698198208983116

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

The influence of the nature and structure of chemically active additives on the chemical modification temperature of friction surfaces was investigated using a KT-2 four-ball machine with various metal and lubricant-additives combination. A synergistic effect of detergent and antioxidant additives on the critical and chemical modification temperature of oil was found.Presented as an American Society of Lubrication Engineers paper at the ASLE/ASME Lubrication Conference in New Orleans, Louisiana, October 5–7, 1981

ISSN:0569-8197    

DOI:10.1080/05698198208983117

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

In order to develop a new self-lubricating composite material, MCA (melamine cyanuric acid adduct) was tested as a filler in phenolic resins and epoxy resins, which were thermosetting, and in polyacetal copolymer, nylon 6 and polypropylene, which were thermoplastic.Presented as an American Society of Lubrication Engineers paper at the ASLE/ASME Lubrication Conference in New Orleans, Louisiana, October 5–7, 1981

ISSN:0569-8197    

DOI:10.1080/05698198208983118

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

The paper discusses the concept of using morphological examination of wear debris to assess the condition of gears in a gear box. The debris examined was produced by three sets of gears that were tested in two special-purpose gear rigs. The experimental techniques employed were transmission and scanning electron microscopy, optical microscopy, and ferrography. It is suggested that an understanding of gear tooth wear may be soundly based on the role of plastic deformation in the wear process. It is concluded that the links between wear and tooth fracture have yet to be established.Presented as an American Society of Lubrication Engineers paper at the ASLE/ASME Lubrication Conference in New Orleans, Louisiana, October 5–7, 1981

ISSN:0569-8197    

DOI:10.1080/05698198208983119

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor