81results about How to "Reduce unbalance" patented technology

An object is to provide a rotor manufacturing method capable of reducing a rotor unbalance amount by controlling a magnet arrangement position in a rotor core and improving work efficiency when fixing a magnet to the rotor core by using resin. A lower surface of a rotor core is arranged in a lower mold. A magnet is arranged in a lower mold. A magnet is contained in each of magnet containing holes formed in the rotor core in such a manner that a predetermined space is assumed between an upper surface of the rotor core and an upper surface of the magnet. An upper mold is arranged on the upper surface of the rotor core. The upper mold and the lower mold apply a pressure to the rotor core and a molten resin is supplied with pressure from an internal diameter side via the predetermined space into the plurality of magnet containing holes from respective cylinder arranged in the upper mold. Thus, the magnets are molded by resin while pressing the magnets toward the outer diameter side of the magnet containing holes.

A plurality of projections are provided abutted with an outer circumference of a columnar axis inserted to an inner circumference of a rotor. The projections are provided in the direction of a magnetic pole in the rotor. When the rotor is fixed to the columnar axis, the projection parts are fixed by “plunge-in” and the other rotor inner circumference parts have an uniform clearance to the columnar axis. The clearance is filled with an adhesive agent, thereby fixing the rotor to the columnar axis.

The invention discloses a processing device for an arc tooth trace cylindrical gear in the technical field of gears. The gear which the processing device is used for is provided with an arc tooth trace, an involute or an arc tooth profile and has equal circumferential tooth thickness. A plurality of blades of the processing device are evenly distributed around a planetary gear train. When the gear is processed, the blades perform plane motion, the gear axis and sun gear rotation axis of the planetary gear train are intersected in different planes, and the gear is processed in a generating method. The arc tooth trace cylindrical gear with the equal circumferential tooth thickness can be processed through the processing device, gear manufacturing precision and efficiency can be improved, and a processed gear pair has stability in transmission and is large in bearing capability and suitable for application to a high-speed heavy-duty gear transmission device.

The invention provides an axial-flow type aeroengine rotor. The axial-flow type aeroengine rotor comprises a rotor blade, a locking device and a blade disc, wherein the rotor blade comprises a blade body and a tenon; the tenon is connected with the blade disc, and the rotor blade is circumferentially locked by the locking device; a sawtooth structure is arranged on the lower portion of a margin plate of the blade body of the rotor blade; a first clamping groove is formed in the outer side surface of the sawtooth structure; a first sealing strip is arranged in the first clamping groove; the blade disc is provided with a mounting groove and a tenon groove and the mounting groove and the tenon groove communicate with each other; a convex part is arranged on one side wall of the blade disc; asecond clamping groove is formed in the inner side surface of the convex part; a second sealing strip is arranged in the second clamping groove; the tenon of the rotor blade is arranged in the tenon groove through the mounting groove; and the shape of the outer side surface of the sawtooth structure is matched with the shape of the inner side surface of the convex part, so that the first sealing strip and the second sealing strip are oppositely arranged. According to the axial-flow type aeroengine rotor, the axial sealing effect of the rotor blade and the disc is improved, the leakage loss isreduced, and the margin and the efficiency of a compressor are improved as well.

The invention discloses a guide wire wheel for polycrystalline silicon cutting wires. The guide wire wheel comprises a wire wheel body, wherein the wire wheel body is manufactured by carbon fibers; and guide wire groove rings are fixed at the outer periphery of the wire wheel body. The preparation process comprises the steps of: 1) shape cutting; 2) compression molding; 3) accurate cutting; 4) molding of the guide wire groove rings; and 5) balance testing. The guide wire wheel is high in accuracy, low in error, small in weight and high in hardness, and largely prolongs the service life.