Extending the life of aerospace dry bearings by the use of hard smooth counterfaces
Extending the life of aerospace dry bearings by the use of hard smooth counterfaces
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DOI：
10.1016/0043-1648(88)90207-4
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发表时间：
1988-02
期刊：
影响因子：
5
通讯作者：
B. Mortimer;J. Lancaster
中科院分区：
文献类型：
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作者：
B. Mortimer;J. Lancaster
含有聚四氟乙烯的0.3-0.4毫米厚的塑料衬垫通常与飞机和直升机中广泛使用的干式轴承的钢面配合使用。使用圆盘上的三销装置对这些衬垫进行了磨损实验，以检查降低钢和其他由较硬材料和涂层制成的表面的粗糙度的效果。对于一些硬质材料，如WC-Co和氧化铝，硬度和表面粗糙度对衬垫磨损的首要重要性得到了证实；表面越光滑，磨损越小。其他材料，特别是物理气相沉积氮化钛，不会降低衬垫磨损率。金属陶瓷和氧化铝表面的衬垫磨损非常低，这表明使用比目前使用的淬火AISI 440C不锈钢更硬的表面可以大大延长轴承的寿命，也许可以延长一个数量级。
Plastics-based liners, 0.3–0.4 mm thick, containing polytetrafluoro ethylene are usually mated against steel counterfaces in dry bearings used extensively in aircraft and helicopters. Wear experiments have been made on a number of these liners, using a tri-pin-on-disc apparatus, to examine the effect of decreasing the roughness of the steel and other counterfaces manufactured from harder materials and coatings. For some hard materials, WC-Co and alumina, the primary importance of hardness and surface roughness on liner wear is confirmed; the smoother the surface the lower the wear. Other materials, and in particular physical-vapour-deposited titanium nitride, do not lead to lower liner wear rates. The very low liner wear obtained against cermet and alumina counterfaces suggests that bearing lives could be extended considerably, perhaps by an order of magnitude, by using harder counterfaces than the hardened AISI 440C stainless steel which is currently used.