دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: Installed in the bearing race of cone. There are a ball bearing and two roller bearing in every cone, both absorbing radial load.

n: in an engine, a large circular friction-reducing device installed on the engines crankshaft. Main bearings are mounted in the engines crankcase and the crankshaft rotates on them. Engine oil lubricates them as the engine runs. Most main bearings are plain bearings, in that their wear surface is flat or plain and do not have balls or rollers. Compare ball bearing, roller bearing.

n: the bearing in rotary , it main function is to bearing or forwarding.

n: a kinds of bearing of cone bit.

n: a groove for the balls in a ball bearing or for the rollers in a roller bearing.

n: 1. on a kelly bushing, a cylindrical device that fits inside the bushing, whose exterior shape is matched to the kellys shape so that they mate with the kelly when it is inside the kelly bushing. See kelly bushing, roller assembly. 2. part of a roller bearing. See roller bearing.

n: on a kelly bushing, an arrangement of rollers, roller pins, and roller bearings that mate with the kelly as it moves up or down inside the kelly bushing. The roller assembly transfers the turning motion of the kelly bushing to the kelly, and, at the same time, allows the kelly to move up and down freely. See rolle!;roller bearing, roller pin.

n: a bearing in which a finely machined shaft (the journal) rotates in contact with a number of cylinders (rollers). Compare ball bearing.

n: The roller bearing be setted at the heel surface of cone bit.

n: a track, channel, or groove in which roller bearings roll.

n: The annular delve track in which the roller rolling.

n: A kind of composition assemble of bearing of cone bit,its diameter larger than 228.6mm.