7results about How to "Improve dynamic balance accuracy" patented technology

The invention discloses a tool and method for detecting the dynamic balance of an impeller of a range hood, and the tool comprises a table-board, the table-board is provided with a detection clamp used for placing the impeller and a volute, the detection clamp is provided with a rotating shaft and a motor, the impeller is detachably connected to the rotating shaft, the motor drives the rotating shaft to rotate, and the motor drives the impeller to rotate. The table top is also provided with a first positioning part and a second positioning part; the first positioning part can move up, down, left and right relative to the detection clamp and is propped against the top of the volute; the second positioning part can perform up-down and left-right movement adjustment relative to the detection clamp, and the second positioning part abuts against and supports the bottom of the volute; the third positioning part can be moved and adjusted back and forth relative to the detection clamp, and the third positioning part abuts against the side part of the volute; and the volute is jointly locked and positioned on the detection fixture through the first positioning part, the second positioning part and the third positioning part. According to the invention, a similar three-axial movement positioning structure is formed to position volutes with different sizes, and a balance test is carried out through a balancing machine.

The invention discloses an equivalent device for crankshaft dynamic balance, which comprises two semicircular equivalent bodies, the lower ends of the equivalent bodies are planes, and the planes of the two equivalent bodies are butted to form the annular equivalent device; the inner diameter of the circular ring shape is the same as the diameter of a connecting rod journal of the crankshaft, and the circular ring shape is used for being sleeved on the connecting rod journal; the device is characterized in that a notch is formed in one side of the equivalent body and used for forming a platform below the notch, an unthreaded hole II is formed in the platform, and a screw hole I which is symmetrical to the unthreaded hole II is formed in the lower end face of the other side of the equivalent body; when the planes of the two equivalent bodies are in butt joint, locking screws penetrate through the unthreaded holes II and then are screwed in the screw holes I, so that the two equivalent bodies are assembled together; a screw hole II is formed in the arc surface of the equivalent body, and a counterweight assembly consisting of a counterweight screw and a counterweight gasket is screwed in the screw hole II; the axis of the counterweight screw points to the circle center of the circular ring shape, and the included angle between the axis of the counterweight screw and the plane of the lower end of the equivalent body is 45 degrees. A connecting rod piston assembly is simulated, the structure is simple, the cost is low, the assembly is convenient and firm, and the equivalent weight device can flexibly carry out counterweight fine adjustment through the counterweight gasket, so that the convenience and the efficiency in a dynamic balance test are improved.

The invention relates to the technical field of inertia rings, and discloses a high-precision inertia ring and a circumferential mass compensation forming process thereof.The high-precision inertia ring comprises a plurality of arc-shaped cylinders, the multiple arc-shaped cylinders are sequentially connected end to end to form the inertia ring of a closed annular structure, every two adjacent arc-shaped cylinders are fixedly connected through a welding seam at the splicing position, and a containing groove is formed in the splicing position; the containing groove is filled with a balance weight piece, and the balance weight piece is used for correcting the uniformity of mass distribution in the circumferential direction of the inertia ring. According to the high-precision inertia ring and the circumferential mass compensation forming process thereof, the accommodating groove at the splicing part is filled with the counterweight piece capable of compensating the mass deviation, so that the circumferential mass of the inertia ring is accurately adjusted; the technical problem of uneven circumferential mass distribution caused by factors such as welding process fluctuation, uneven solder filling and operation difference of an existing inertia ring formed through stamping and welding is solved from the structural level, and the dynamic balance precision and the operation stability of the inertia ring during high-speed rotation are remarkably improved.

The utility model provides a disc type motor and an automobile, and relates to the automobile part technology field, the disc type motor comprises a rotating shaft, a first bearing, a second bearing, a stator assembly, a first rotor assembly and a second rotor assembly, the stator assembly is penetrated along the axial direction to form a bearing chamber, the first bearing and the second bearing are sleeved on the rotating shaft at intervals, and the second bearing is sleeved on the first rotor assembly. The first bearing and the second bearing are used for being installed in the bearing chamber, the first rotor assembly is arranged at the end, close to the first bearing, of the rotating shaft, and the second rotor assembly is arranged at the end, close to the second bearing, of the rotating shaft. According to the scheme of the utility model, since the bearing is arranged between the rotating shaft and the stator assembly, when the rotor assemblies are subjected to dynamic balance operation, end covers on two sides do not need to be arranged, and the magnetic field of the motor assembly is utilized to drive the first rotor assembly and the second rotor assembly to move so as to simultaneously carry out dynamic balance operation on the two rotor assemblies; and the influence of assembly on a dynamic balance result is reduced.

The invention provides an axial flow fan which comprises a silencer shell, an impeller is arranged outside one side of an air outlet of the silencer shell, a flow guide cover is arranged on a hub on one side of an air inlet of the impeller, a machine shell barrel is arranged outside the impeller, a space guide vane is arranged on one side of the air outlet of the impeller and on the inner side of the barrel, a motor is arranged in the space guide vane, and a fan is arranged in the motor. And triangular rib plates are arranged on the inner sides of the flanges at the two ends of the shell cylinder. The structural strength of the fan can be effectively enhanced, the vibration index of the shell barrel is improved, the total pressure efficiency of the fan is effectively improved, and noise is reduced; the boundary dimension of the fan with the same purpose and the same performance is effectively reduced, and miniaturization is achieved; the rotor dynamic balance precision and the whole machine dynamic balance precision of the fan are effectively improved, the manufacturing process is simplified, and the whole machine stability is improved.

This application discloses an automotive wheel hub mold with upper and lower split side molds, including an upper mold, a lower mold, and several side molds. The side molds include a front wheel rim side mold and a rear wheel rim side mold that fit together vertically. The front wheel rim side mold is equipped with a cooling device. This cooling device guides the cooling medium to uniformly and rapidly cool the thickness portion where the front wheel rim connects to the spokes. It includes a cooling chamber, a reflector plate, a water inlet pipe, and a return pipe. The reflector plate is located at the top of the cooling chamber. One end of the water inlet pipe extends into the cooling chamber and slopes upwards towards the reflector plate. The core solution employs a cooling device with a reflector plate. Through optimized pipe structure and program control, uniform dispersion and cooling of the cooling medium are achieved, improving the casting efficiency and solidification quality of this type of wheel, while reducing localized thermal shock to the mold and reducing the risk of surface cracking.

The utility model discloses a motor rotor with high stability, which comprises a shaft and a rotor body arranged on the outer side of the shaft, and micro-channels are symmetrically arranged in the shaft. A cavity of a U-shaped structure is formed in the middle of the shaft, a piston block slides in the cavity, inlet and outlet pipes extending to the outer side of the shaft are fixedly arranged at the two ends of the cavity, sealing pieces are arranged at openings of the inlet and outlet pipes, and the cavity is filled with fluid media. By means of the structure, a balance system is formed by the U-shaped cavity and the piston block, the mass distribution of the rotor can be adjusted, the mass deviation can be compensated to restrain vibration, and the dynamic balance precision is improved; the spiral micro-channel is matched with the graphene heat-conducting film and the rotor fan blade, so that a good heat dissipation structure can be formed, the rotor is cooled, local overheating deformation is avoided, efficient heat dissipation is achieved, and the performance of the rotor is improved.