Thrust washers

When significant continuous loads have to be taken on a thrust washer, it is necessary to machine into the bearing surface a profile to generate a fluid film. This profile can be either a tapered wedge or occasionally a small step. 

Figure 12-61 also illustrates three basic types of trunnion rollbearing assemblies. Antifriction pihow blocks are the most common on modern diyers however, when the dryer load requires larger than a 12.7- to 15.2-cm-diameter bearing on the trunnion shaft, the dead-shaft antifriction bearing is substituted. This represents a considerable cost saving compared with the larger pillow blocks. They are completely sealed and continuously bathed in lubricant. Pillow-block bushings are less often used. The thrust washers are difficult to seal against dust, and they draw more power. Thrust roll mountings are depicted also in Fig. 12-61. These are usually dead-shaft.

Figure 1 shows photos of the two benchtop systems that were used in these tests they consisted of a vacuum tribometer for low-speed ball-on-disk sliding in air and pure subambient H3, and an ambient-pressure tribometer using a thrust washer sliding configuration in different atmospheres, including a N/H mixture. 

In a different set of tests, medium-speed thrust washer sliding was done on Ti-6A1-4V. ty pe 6061-T6 Al, X-750, type 316 stainless steel, and X-750 samples coated with either a friable or a bonded commercial M0S2 coating. Tests were performed using ramped rotation speed, to assess friction as a function of sliding speed ramped load, to assess friction as a function of load or different atmospheres, to assess the effect of ambient gas on friction. Variable tests were ramped up and down, often more than once, to ascertain the reproducibility of the data. Sliding was stopped during... 

Transmission components, transmission thrust washers, braking and air-conditioning systems, ABS brake systems. .. 

Imperial Chemical Industries has introduced a new crystalline poly(ether ether ketone) (PEEK) (structure 4.78). Applications are for compressor plates, valve seats, thrust washers, bearing cages, and pump impellers. In the aerospace industry it is employed as aircraft fairing, fuel valves, and ducting. It is also used in the electrical industry as wire coating and semiconductor wafer carriers. 

Aluminum Pistons, turbocharger/blower, pump vanes, thrust washers, bearings... 

Copper Oil cooler tubes, bearings, bushings, thrust washers, valve guides, injector shields... 

Fig. 4. High-pressure/high-temperature cavity for in-situ EPR measurements (1) pressure vessel body (2) pressure vessel lid (3) nut (4) thrust washer (5) cavity top (6) cavity (7) high-pressure gas fitting (8) PTFE tuning wedge (9) tapered waveguide (10) water jacket (11) Lucalox plug (12) heater lead feedthrough (13) modulation coil feedthrough (14) thermocouple feedthrough and (15) heater assembly. Reprinted from Reference 44).

Galvanise casing, corrosion inhibitor, thrust washers... 

Engineering polymers for high-temperature and -pressure applications are in use extensively in original equipment manufacturers around the world. The high-strength properties of these materials are necessary to obtain the desired mass reductions, efficiency, cost, and performance required in today s market. In current automotive applications, several polymers predominate for thermoplastic seals, thrust washers, intake manifolds, and other components. 

Meldin . OPuron] Pr< >rietarypolyiinide resin for bearings, thrust washers, jns-ton rings, elec7eiectronic parts, gears, bearing retainers. 

Many products, particularly the often very complex near-net or net shape parts (Fig. 6.11-9), which also include simpler gears, self-lubricating or high temperature bearings, bushings, retainer hubs, roller guides, thrust washers and discs, wire guides with molded-in holes, wear strips, and many more, are made on punch-and-die... 

D — Cover E — Locknut F — Thrust Washer G — Main Nut H - Seal Ring J - Main Body... 

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