| 摘要 |
<p>A bearing assembly for a piston rod of a linearly reciprocating piston type engine, such as a floating piston type compressor, having a cylinder (11), a floating piston (12) movable axially in cylinder (11), at least one piston rod (13) secured to and projecting axially from one side of the piston to be received in a respective bearing assembly (17) at one end of the cylinder and which guides the movement of the piston / piston rod assembly, said bearing assembly comprising: an inner annular array of balls (18) which roll on the cylindrical outer surface of the piston rod (13) during its reciprocation, and housed in an annular space defined between the cylindrical outer surface of rod (13) and a sleeve (19); bearings (20) which rotatably mount sleeve (19); and means for rotating sleeve (19) about the axis of the piston rod (13) during linear reciprocation of the latter, to reduce wear of the balls when lubricant is provided and thereby provide more reliable operation.</p> |
