摘要:
An axial air movement fan having a plurality of variable pitch fan blades (2), extending radially from a hub (4) rotatable about a main axis (3), each blade (2) further being pivotable about its radial axis to vary the blade pitch. The blades (2) each are mounted on an associated bearing (5) mounted on said hub, the bearing comprising a ball bearing having a first radially inner race (25) fast the blade (2) and a second radially outer race (26) rotationally fast to the hub (4). The balls (14) in the bearing are separated by separators (15), each separator being generally cylindrical and having its cylindrical axis coaxial with the orbital axis (22) of the orbit of the balls (14) and being adapted to rotate about the said orbital axis (22), the side faces of the separator each having a part spherical recess (16) adapted to receive a ball (14). Rotation of the separator (15) about the orbital axis (22) is such as to entrain lubricant in the bearing and to bias the lubricant from adjacent the outer race (26) over the balls (14) towards the inner race (25).
摘要:
A spherical roller bearing (56, 72) includes an outer ring (20), an inner ring (24), and a plurality of rollers (14) positioned between the outer and inner rings and arranged in a row. The bearing also includes a first separator (10) positioned between adjacent first and second rollers in the row. The first separator includes a first plurality of contact pads (44) that engage the first roller, and a second plurality of contact pads that engage the second roller for maintaining separation and spacing of the first and second rollers. The bearing further includes a second separator (10) positioned between adjacent third and fourth rollers in the row. The second separator includes a first plurality of contact pads (44) that engage the third roller, and a second plurality of con- tact pads (44) that engage the fourth roller for maintaining separa- tion and spacing of the third and fourth rollers. The separators (10) are movable independently of each other.
摘要:
An axial air movement fan having a plurality of variable pitch fan blades (2), extending radially from a hub (4) rotatable about a main axis (3), each blade (2) further being pivotable about its radial axis to vary the blade pitch. The blades (2) each are mounted on an associated bearing (5) mounted on said hub, the bearing comprising a ball bearing having a first radially inner race (25) fast the blade (2) and a second radially outer race (26) rotationally fast to the hub (4). The balls (14) in the bearing are separated by separators (15), each separator being generally cylindrical and having its cylindrical axis coaxial with the orbital axis (22) of the orbit of the balls (14) and being adapted to rotate about the said orbital axis (22), the side faces of the separator each having a part spherical recess (16) adapted to receive a ball (14). Rotation of the separator (15) about the orbital axis (22) is such as to entrain lubricant in the bearing and to bias the lubricant from adjacent the outer race (26) over the balls (14) towards the inner race (25).