TAILIEUCHUNG - The Design of Rolling Bearing Mountings Part 6

Tham khảo tài liệu 'the design of rolling bearing mountings part 6', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 42 Axle box roller bearings of an Intercity train carriage 43-44 UIC axle box roller bearings for freight cars The car body is supported by laminated springs on the laminated springs have the additional job of guiding the wheelset. To limit the swaying motion of the car body and to accommodate the thrust peaks the housing features guiding surfaces in which the axle support of the frame is engaged. Cylindrical or spherical roller bearings are used as axle box roller bearings. The housing boundary dimensions of the UIC bearing are standardized. According to the latest UIC conditions 130 mm diameter journals are specified for cylindrical and spherical roller bearings. In some cases 120 mm journals are used for cylindrical roller bearings. Clearance The tight fit expands the inner ring thus reducing radial clearance. A further clearance reduction results from the air stream developed during travel which cools the outer ring more than the inner ring. Therefore cylindrical roller bearings with a radial clearance of 130 to 180 microns and spherical roller bearings with increased radial clearance C3 are chosen. Lubrication sealing The axle box roller bearings are lubricated with a lithium soap base grease. Felt seals combined with a labyrinth have proved most effective for cylindrical roller bearings. UIC axle boxes with spherical roller bearings invariably use only labyrinth seals. Dimensioning bearing selection Operating data 43 UIC axle boxes with cylindrical roller bearings 44 UIC axle boxes with spherical roller bearings Deadweight with max. payload Gmax Top speed vmax Wheel diameter Dr 40 000 kg 100 km h 1 m 40 000 kg 100 km h 1 m Number of wheelsets 2 2 Wheelset weight Gr 1 300 kg 1 300 kg Weight on axle A 20 000 kg 20 000 kg Number of bearings per wheelset iR 4 cylindrical roller bearings 4 spherical roller bearings Supplementary factor fz fa fa 1 for cylindrical roller bearings where thrust loads are taken up by the lips fa for spherical roller .

TỪ KHÓA LIÊN QUAN
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.