TAILIEUCHUNG - Handbook of Lubrication Episode 2 Part 6

Tham khảo tài liệu 'handbook of lubrication episode 2 part 6', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 478 CRC Handbook of Lubrication FIGURE 1. The effect of lining thickness on babbitt fatigue strength. From Szeri A. Z. Ed. Tribology Friction Lubrication and Wear Hemisphere Publishing Washington . 1980. With permission. FIGURE 2. Section through babbitt thickness showing advanced stage of fatigue cracking in babbitt with cracks extending to bond and intersecting. Magnification X 75. From Burgess P. B. Lubr. Eng. 9 6 309 1953. With permission. Copyright 1983 CRC Press LLC Volume II 479 FIGURE 3. Sketch showing babbitt fatigue initating wiping damage. FIGURE 4. Babbitt fatigue in 178-mm 7-in. diameter turbine bearing with thick babbitt 2 machinery in which the bearings are used and is in the form of weld spatter grinding wheel abrasive and foundry sand. Other debris can enter the bearing from the Regardless of the source the debris can cause scoring and tracking of the bearing surface and embedding of the debris in the surface. Journal scoring can also occur but its severity is dependent upon the relative hardness of the debris and journal materials. In some cases the debris becomes completely embedded in the bearing material and results in only superficial wear damage with no significant effect on bearing performance. In other cases severe wear damages both the bearing and journal. Increased wear and ultimate failure of the bearing occurs. Figure 5 shows circumferential scoring tracking and embedded debris in a 76-mm 3-in. diameter tin-base babbitt bearing with an embedded debris particle at the end of a score mark. Self-propagating mechanical wear by debris can also occur. One such type of wear has Copyright 1983 CRC Press .

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