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.

The invention discloses a method for optimizing centroid eccentricity of an engine core engine rotor. The method for optimizing centroid eccentricity of the engine core engine rotor comprises a first step of taking a minimum value of a core engine rotor joint face centroid eccentricity OC as an optimization target of the method for optimizing centroid eccentricity of the engine core engine rotor; a second step of establishing a core engine rotor centroid eccentricity prediction optimization mathematic model; a third step of obtaining a theta value corresponding when the actual spin axis OC of the labyrinth disc fitting centroid O deviated from the core engine rotor, and performing high pressure turbine rotor and high pressure compressor rotor angle rotation assembly according to the theta value. According to the method for optimizing centroid eccentricity of the engine core engine rotor, before rotor assembly, by optimal calculation, the angular phasing corresponding when the OC value is minimum is selected to guide core engine rotor assembly, and the goal of reducing centroid eccentricity of the core engine rotor and an unbalanced amount of the core engine rotor and improving high voltage rotor vibration is achieved.

The invention discloses a dynamic compensation wheel rim for compensating system unbalance of a tyre dynamic balancing testing machine and a method. The invention aims to solve the following problems that the relatively great system unbalance of the tyre dynamic balancing testing machine affects the test precision and resolution of the system; an eccentric compensation algorithm and operations are only used for calculating the system unbalance mass and cannot achieve real compensation of the system unbalance; currently some compensating devices require great modification of a conventional structure; and a counterweight correcting face and a measurement correcting face are not consistent. Four T type grooves with scribed lines are arranged on the orthogonal direction of the wheel rim. Counterweight blocks are further arranged. Each counterweight block group is a pair of T type bolt-nut pair structure matching the orthogonal T type grooves in terms of the dimension. The system unbalance can be lowered to an ideal range through the combined movement of the counterweight blocks with a known mass. The equipment detection precision is effectively improved.

The invention relates to a turbine moving blade sequencing method. The turbine moving blade sequencing method comprises following steps: 1) carrying out grouping, taking all moving blades as originalsamples, and dividing the moving blades into several groups; 2) carrying out intra-group optimal sequencing, and carrying out optimization sequencing on samples in each group through an enumeration method; and 3) carrying out inter-group optimal sequencing, carrying out optimization sequencing on the groups through the enumeration method, and determining the final sequence of the original samples.The turbine moving blade sequencing method strives to determine the assembling sequence of the turbine moving blades under reasonable calculated quantity, and to control the amount of unbalance generated by the moving blades to a minimum level, through grouping, the intra-group blade sequence is first optimized, then the sequence of the groups is optimized again, the amount of unbalance is reduced, and therefore the finally-obtained total amount of unbalance is low, and the turbine moving blade sequencing method can also carry out blade sequencing in an occasion having a large number of blades and having an exact demand on the amount of unbalance.

The invention discloses a process method of improving wall thickness uniformity of a closed thin-walled rotary part. The process method comprises the steps: (1) designing a finish turning clamp of a novel structure; (2) designing a following process route according to the finish turning clamp; and (3) adjusting the working allowance of a finish turning procedure. As the performance and reliability of a new generation engine are improved, a higher requirement is posed to the processing precision of a part; a designer requires the amount of unbalance of the rotary part more and more strictly. Therefore, reduction of the amount of unbalance of a cover hood part which is relatively great in processing difficulty will be widely applied by using the method. Meanwhile, the technology is suitable for both processing closed rotary parts which are different in structure and size and improving the processing precision of the part, and the process method has a wide application prospect.

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 relates to a CG150 engine adopting light-weight optimization and balance optimization technology, belonging to the motorcycle engine field. It mainly solves problems that the whole machine has serious vibration and outputs of power and torque are smaller because the rotational inertia is not appropriate and friction loss is larger. The optimization design not only relates to thermal parts such as piston, piston ring, piston pin, piston block joint and cylinder so on but also changes main parts such as crank-connecting rod, box, crank bearing, bearing pushing bolt and variable speed assembly so on. By decreasing frictional loss of thermal parts outputs of power and torque are improved. By optimal dynamical balance rate and main shaft angle the vibration is decreased. By changing transmission ratio the effect of comfortable riding is obtained. It is used for motorcycle engine so as to be suitable for mountain road.

The invention discloses a rotor of a drive motor of a new energy automobile. The rotor is provided with a rotor iron core, wherein the rotor iron core is provided with a permanent magnet groove extending from the upper end face of the lower end face of the iron core and, the middle part of the rotor iron core is provided with an axial iron core inner round hole and the inner wall of the inner round hole of the rotor iron core is provided with a boss; a rotor shaft fitting with the inner round hole of the rotor iron core and provided with an axial open groove fitting with the boss; an upper end board whose lower end face fits the upper end face of the iron core and is provided with a first guide groove communicating with a permanent magnet groove and also provided with an air inlet and air outlet both communicating with the first guide groove; a lower end board whose upper end face fits the lower end face of the iron core and provided with a second guide groove communicating with the permanent magnet groove. Therefore, rotor structural weight and rotation inertia are reduced; the manufacture cost is reduced; and the integral performance of the drive motor is improved.

The invention discloses a rotor iron core convenient to produce. The rotor iron core comprises a plurality of iron core sheets which are superposed together. Each iron core sheet is provided with a plurality of rivet holes convenient to run through and heat dissipation holes; the iron core sheets are uniformly distributed and superposed to form three iron core groups which are connected together. Each iron core group is formed by the plurality of same iron core sheets; each iron core sheet is provided with two groups of uniformly-distributed rivet holes; meanwhile, each iron core sheet is provided with two key grooves; and the iron core sheet is provided with a balance hole in the circumference of the heat dissipation hole. The rotor iron core has the advantages of reducing production labor hour, simplifying manufacture steps, reducing production cost wholly, being convenient for rivets to pass through, being stable in motor operation, being small in torque pulsation and motor noise, simplifying dynamic balance correction work load, and reducing manufacture cost of the motor.

Provided is a narrow channel two-element working wheel for a turbocompressor. Blades are forged on a wheel disc through a semi-open type and closed type combined mode, and the wheel disc and a wheel cap are annularly connected through manual argon arc welding. The wheel cap and the blades are connected together through braze welding. The narrow channel two-element working wheel has the advantagesthat the welding strength is sufficient, a channel welding transition area is smooth, the unbalance amount is small and the appearance quality is high.

The invention provides an adjustable connecting device and a fan using the same, the adjustable connecting device comprises a connecting piece, a fan blade and a wheel disc, the connecting piece is arranged between the fan blade and the wheel disc, and the connecting piece can enable the relative angle between the connecting piece and the fan blade to be adjustable; and/or the relative angle between the wheel disc and the connecting piece can be adjusted; the problems that the angle of the fan blade cannot be adjusted, different performance requirements (including but not limited to static pressure, air volume and the like) of different customers cannot be met at the same time, the project development period is too long, and customer loss is caused due to the influence on the project development progress are solved; and meanwhile, the problems of too high mold opening cost and low generalization degree caused by a large amount of mold opening due to demand change are solved, the product generalization is improved, the new cost input is reduced, and extremely high practical value and cost benefit are achieved.

The invention discloses a clutch assembly and clutch pressure plate balancing tool. The balancing tool comprises a fixed plate and a movable plate. The movable plate is installed in the middle of the fixed plate. The fixed plate is connected with a fixed sleeve through the movable plate. The bottom part of the movable plate is equipped with a mobile block. By adopting the technical scheme of the invention, generation of the unbalanced amount is reduced, and coaxiality and safety of a clutch assembly during the balancing process are ensured.

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.