Abstract: A rotor assembly for a rotating machine includes a substantially cylindrical main rotor body having an outer surface. A plurality of longitudinal ribs project from the outer surface of the main rotor body. A plurality of primary recesses are defined by adjacent ribs and a secondary recess is defined in the outer surface within at least one primary recess. A magnet is positioned within at least one primary recess, and a layer of adhesive between the magnet and the outer surface of the main rotor body fills the secondary recess. Magnet retaining elements. in the form of either an encapsulation layer, star-shaped retainer or elongated retaining members may also be used. The magnet retaining elements may be used alone or in combination with the adhesive layer between the magnets and the main rotor body.

Abstract: A motor having improved resistant to vibration has a shaft, a pair of bearings engaging the shaft, a set of pressed-on laminations stacked axially on the shaft between the pair of bearings, and a stator. Only a portion of the set of laminations actually engage the shaft, preferably because the central hole of some of the laminations is enlarged slightly by counterboring. Alternately, the diameter of the shaft or the length of splines on the shaft that engage the laminations may be adjusted so that not all of the laminations engage the shaft. A method of tuning a rotor to reduce unwanted noise and vibration from a motor includes the steps of selecting a first motor, measuring the natural frequency of the rotor system of the motor, selecting an increment to the natural frequency, and adjusting the construction of a second motor in accordance with the direction of the desired increment.

Abstract: In a machine in which a rotating shaft extends into a housing through a gland, the shaft being rotated in only one direction, the housing containing lubricant, the gland including an opening of substantial length with an annular radially inwardly extending flange at an axially inner end, an anti-leakage device comprises a sleeve mounted on and around the shaft closely but to permit rotation of the shaft, and mounted against rotation in the gland opening. The sleeve has an annular seat, in which an O-ring is mounted, and a helical groove in a surface contiguous the shaft, the groove being formed in a direction with respect to the direction of rotation of the shaft to move fluid in a direction toward the housing. The clearances between the shaft and housing when the shaft is not rotating are such as to prevent the lubricant in the housing from leaking out.

Abstract: A bearing lubrication system in which a shaft is journaled for rotation in an integral bearing in a gear box, the bearing being primarily loaded through less than its full circumference, leaving an unloaded reach of the bearing, the bearing being interrupted through a substantial arc in at least a portion of the unloaded reach to define a gap in the bearing through which lubricant travels, is provided with a fixed scoop for channeling lubricant into the gap. The bearing is a solid bearing, of a piece with a gear box housing, as is the scoop.

Abstract: A bearing lubrication system in which a shaft is journaled for rotation in an integral bearing in a gear box, the bearing being primarily loaded through less than its full circumference, leaving an unloaded reach of the bearing, the bearing being interrupted through a substantial arc in at least a portion of the unloaded reach to define a gap in the bearing through which lubricant travels, is provided with a fixed scoop for channeling lubricant into the gap. The bearing is a solid bearing, of a piece with a gear box housing, as is the scoop.

Abstract: A hydrodynamic bearing for limited roller oscillation incorporates a pair of oil slots which clear debris from the roller/pin interface and provide oil to readily lubricate the entire load bearing surface of a pin. The preferred oil slots each extend lengthwise along the pin, and widthwise generally across respective chords of the pin circumference. The oil slots are positioned in spaced relationship such that their respective chords define an angle whose vertex is beyond the circumference of the pin, and their spacing defines an upper load bearing zone along a portion of the circumference of the pin, and opposite therefrom, a larger, lower load bearing zone defined along another portion of the circumference of the pin.