67results about How to "Reduce unbalanced force" patented technology

The vibration and noise excited by the electromagnetic exciting force in the radial direction of an electric motor are suppressed.

In an electric motor 100, a rotor 1 is divided into four rotor pieces 3, 4, 5, and 6 for an axial length of 2L of one group of the rotor core, and for example, the four rotor pieces 3, 4, 5, and 6 are ideally 0.29L, 0.71L, 0.71L, and 0.29L in axial length in the axial direction, and permanent magnets 2 of the rotor pieces 3, 4, 5, and 6 are arranged in the circumferential direction so that the phase differences of the electrical angle are 0, π, 0, and π. Further, when an effect is obtained even if the ideal axial length is changed, the tolerance of the aforementioned axial length is ±0.1L.

A stabilization system for a rotating load, such as a flywheel, includes a mechanical bearing to continuously support a shaft of the rotating load so as to hold the shaft at a substantially fixed axis of rotation. A magnetic stabilization assembly includes a plurality of electromagnets arranged around the shaft. Control circuitry for controls a resultant magnetic field generated by the electromagnets such that the magnetic field acts on a ferromagnetic element of the shaft to reduce imbalance forces acting on the shaft.

Apparatus for transmitting torque between a power source and a transmission, includes first and second coaxial input shafts, a housing, first bearing rotatably supporting the first input shaft on the housing, clutch assembly, flywheel, support shaft secured to the flywheel and located radially between the first and second input shafts, and second bearing located radially between the second input shaft and the support shaft. The clutch driveably connects and disconnects the flywheel and an input shaft.

The invention relates to the field of large-span stadium awning structures, in particular to a carbon fiber cable reinforced spoke type cable truss structure. The spoke type cable truss structure comprises a radial cable truss, an inner pull ring and an outer pressing ring, wherein the inner pull ring and the outer pressing ring are arranged at the two ends of the radial cable truss. The radial cable truss is composed of an upper radial cable, a lower radial cable and cable truss supporting rods, the inner pull ring is composed of an upper ring cable, a lower ring cable, a ring cable supporting rod and an inner ring cross cable, and the inner ring cross cable is a carbon fiber cable. According to the carbon fiber cable reinforced spoke type cable truss structure, the carbon fiber cross cable is additionally arranged in an inner ring cable plane of the spoke type cable truss structure; after the improvement, the vertical rigidity of the spoke type cable truss structure is greatly enhanced, and the response is obviously reduced under the action of wind loads and the like. The carbon fiber cable is small in section and rigidity, the influence on the inner pull ring cable force is small, the cable clamp unbalanced force can be remarkably reduced, the cable clamp structure is simplified, and therefore the problem that the cable clamp bearing capacity is insufficient is solved without additionally arranging balance cables.

The invention discloses a novel balance self-regulation system of a geotechnical centrifuge. The novel balance self-regulation system comprises a water box, a load cell, a control valve and a controller, wherein the water box is placed inside a hanging basket at the weight end of the centrifuge, the load cell is arranged on a rotary arm support, the control valve and the controller are arranged inside a small instrument cabin of a centrifugal field, the signal output end of the load cell is connected with the signal input end of the controller, and the signal output end of the controller is connected with the signal input end of the control valve. After loads at the work end of the centrifuge are increased, the load cell detects unbalanced force, an electromagnetic switch valve in the control valve is switched on, the water box starts to be filled with water, and the electromagnetic switch valve is switched off and water filling is stopped until the unbalanced force gets close to zero. When the centrifugal field and the loads change freely, the novel balance self-regulation system can achieve balance self-regulation of the centrifuge. Compared with an existing regulating mechanism with a balancing weight driven by a hydraulic cylinder or a motor, the novel balance self-regulation system is simpler in structure and wider in unbalanced regulating range.

The invention provides a magnetic suspension wind power generator, comprising impeller, shaft, motor and bearings, where the impeller is arranged at one end of the shaft, the motor is arranged at the other end of the shaft, and one or two sides of the motor are equipped with bearings, and it is characterized in that: one or two sides of the bearing are equipped with magnetic suspension devices, which comprise one or one group of magnetic or magnetic-conducting rotators fixed on the shaft and magnetic stator device arranged outside the rotators, where the magnetic stator device comprises stator magnet which makes a height difference from the rotator and keeps an axial gap from the rotor. And the invention has features of simple, reasonable and compact structure, low cost, maintenance-free, reducing the starting wind speed of the wind power generator and able to effectively raise the output power of the power generator.

The invention provides a temporary anchor cable balance construction method in the erecting process of a suspension bridge girder, and belongs to the technical field of bridge engineering. The temporary anchor cable balance construction method comprises the steps that a bracket is erected at the position close to the anchorage position firstly, the first section of the girder is mounted on the bracket, and a temporary anchor cable is mounted on the girder to be connected with a side span main cable; then a mid-span beam section is hoisted, the temporary anchor cable mounted on the first section of the girder automatically tightens while the weight of the mid-span beam section is gradually transferred to a mid-span main cable, equivalently, the load is simultaneously applied to the side span and the side span main cable, and significantly-increased main cable force due to the excessively high weight of the beam section of the mid span is balanced; and then a beam section is hoisted at the side span, the side span main cable generates large displacement downwards, thus the tightened temporary anchor cable automatically loosens, the increase amplitude of the side span main cable forceis also decreased accordingly, and unbalanced force of a cable tower due to hoisting construction is decreased. According to the temporary anchor cable balance construction method, the ability of automatically balancing the main span main cable force and the side span main cable force of a suspension bridge is achieved, the bending moment of the cable tower can be decreased, and thus bridge toweris safer during stress.

The invention provides a high-stability three-degree of freedom moving motor, and relates to the technical field of three-degree of freedom motors. The high-stability three-degree of freedom moving motor comprises an autorotation module and a deflection module, wherein the deflection module comprises an outer stator, a middle rotor and an inner stator; the inner stator is fixed with a shell through the lower opening of the middle rotor; the autorotation module comprises an autorotation stator, an autorotation rotor and an output shaft which is fixed with the autorotation rotor; the autorotation stator is rotatably connected with the output shaft; and the autorotation stator is fixedly connected with the upper opening end of the middle rotor. The high-stability three-degree of freedom moving motor is mainly used for solving the problems that relatively large rotor eccentric displacement is easy to generate, the stability is relatively bad and constant torque is difficult to output whenhigh-speed revolution and directional inclined operation are separately realized as the volume is large and the rotation inert is too large in the prior art. The high-stability three-degree of freedommoving motor has the characteristics of being strong in driving module independence, high in cooperative control accuracy, small in mechanical system duty ratio, small in volume, good in response speed smoothness, good in stability, relatively constant in output torque and wide in application.

A vibrator comprises an upper, lightweight, honeycomb rocker plate suspended above a rigid, lower base by a pair of triangular truss rocker arms. A pair of rigid, parallel, spaced-apart stringers within the vibrator rise upwardly from the lower base. A rocker shaft extending between the stringers pivots the rocker arms near their midpoint. A motor secured to the base within the vibrator drives a spaced-apart flywheel assembly that is mounted with a crankshaft journaled between the stringers. The motor is coupled to the flywheel assembly with a drive belt extending between suitable pulleys. The flywheel assembly crankshaft terminates in spaced apart, offset portions that reciprocate connecting rods linked to one end of the triangular truss rocker arms that vigorously vibrate the rocker plate.

The invention discloses a volute type centrifugal pump with a movable guide vane. According to the volute type centrifugal pump with the movable guide vane, a rectifying grid is arranged at an outletof a suction elbow pipe, so that the energy loss of fluid at an inlet of a flow channel is reduced, the cavitation performance is improved, and vibration and noise are reduced. The movable guide vanestructure of the volute type centrifugal pump with the movable guide vane is arranged between an impeller outlet and a volute inlet, the angle of the guide vane can be adjusted according to differentworking conditions, and the flow at the impeller outlet can be rectified under different working conditions, so that the influence of unbalanced force is reduced, and the operation stability of a large unit is improved. Moreover, the structure is beneficial to reducing the impact loss caused by the fact that the water flow impacts the guide vane when the liquid flow at the impeller outlet enters the guide vane, so that the efficiency of the large centrifugal pump is improved.

The invention discloses a vertical type direct connection draught fan. The vertical type direct connection draught fan mainly comprises a shaft, a bearing, a three-dimensional curved surface impeller, a permanent magnet rotor, a stator coil without an iron core and an impeller shell. The shaft is installed on the impeller shell through the bearing. The permanent magnet rotor, the impeller and the shaft are fixedly connected. The stator coil and the impeller shell are fixedly connected. The impeller is arranged in the impeller shell. The stator coil is coupled to the permanent magnet rotor. A magnetizer is further installed on the other side, symmetrical to the permanent magnet rotor, of the stator coil. A brushless direct current motor and the impeller are integrally and vertically installed, so that the gravity of the impeller and the rotor is balanced to the lifting force produced by the three-dimensional impeller during working, and the axial force on the bearing is reduced to the greatest extent. The vertical type direct connection draught fan is used in cooperation with a brushless motor driver, the starting current is small, the power factor is high, and the motor efficiency is improved. The coil directly drives the rotor, a high-speed coupler is omitted through the rotor and the impeller, the cost is reduced, the system efficiency is improved, and the weight is reduced. The vertical type direct connection draught fan has the advantages of having a few components and being small in size and is simple and compact in structure.

The invention discloses a yoke plate tightener for overhead line stringing. The yoke plate tightener comprises a V-shaped body, wherein the V-shaped body comprises two landing legs, and each landing leg is provided with a hook; the two landing legs comprise the first landing leg and the second landing leg, wherein the first landing leg is provided with a fixed plate, and the fixed plate is provided with a fifth through hole which penetrates through the fixed plate in the thickness direction of the fixed plate; the joint of the two landing legs of the V-shaped body is of an arc shape. The yoke plate tightener for overhead line stringing has the advantages of enabling a hauling cable and double-string porcelain insulators to be reliably connected, being capable of improving safety and reliability of electric transmission line conductor stringing, improving stringing efficiency and lowering labor intensity of workers on towers, reducing the number of the workers, being low in construction difficulty and the like.

The invention discloses a combined type two-degree-freedom mixed type stepping motor with an orthogonal cylindrical structure for a robot and an application thereof. The combined type two-degree-freedom mixed type stepping motor comprises a first-degree-freedom motor, a second-degree-freedom motor and an output shaft, wherein the first-degree-freedom motor is of a cylindrical structure, the first-degree-freedom motor rotates about a rotating axis which is the diameter direction of the bottom of the cylindrical structure, the second-degree-freedom motor is of a cylindrical structure and is arranged on the outer edge of the first-degree-freedom motor, the axis center of the second-degree-freedom motor is vertically orthogonal to the axis center of the first-degree-freedom motor, the second-degree-freedom motor rotates about a rotating axis which is the shaft center of the first-degree-freedom motor, and the second-degree-freedom motor retains independent movement relative to the first-degree-freedom motor during the rotating process of the first-degree-freedom motor, so that the output shaft arranged on the outer side of the second-degree-freedom motor realizes two-degree-freedom movement. The research and development period of a product is shortened, and the performance of the product is improved. Practical utilization, industrialization and commercialization of multi (two)-degree-freedom motors are further facilitated.

The invention discloses a two-degree-freedom mixed type stepping motor with an orthogonal cylindrical structure for a robot. The two-degree-freedom mixed type stepping motor comprises a first-degree-freedom motor, a second-degree-freedom motor and an output shaft, wherein the first-degree-freedom motor is of a cylindrical structure, the first-degree-freedom motor rotates about a rotating axis which is the diameter direction of the bottom of the cylindrical structure, the second-degree-freedom motor is of a cylindrical structure and is arranged on the outer edge of the first-degree-freedom motor, the shaft center of the second-degree-freedom motor is vertically orthogonal to the shaft center of the first-degree-freedom motor, the second-degree-freedom motor rotates about a rotating axis which is the shaft center of the first-degree-freedom motor, and the second-degree-freedom motor retains independent movement relative to the first-degree-freedom motor during the rotating process of the first-degree-freedom motor, so that the output shaft arranged on the outer side of the second-degree-freedom motor realizes two-degree-freedom movement. The research and development period of a product is shortened, and the performance of the product is improved. Practical utilization, industrialization and commercialization of multi (two)-degree-freedom motor are further facilitated.

The invention provides a pressure balancing type high-precision high-pressure-difference control valve which comprises a valve body and a pressure reducing channel. An inlet and an outlet are formed in the two sides of the valve body. The pressure reducing channel is composed of a valve core, a valve core sleeve and a valve base. A drainage runner is arranged between the valve core sleeve and thevalve body. A drainage opening communicating with the drainage runner is formed in the upper end of the valve core sleeve. The drainage runner communicates with the outlet. Multiple ring-shaped bossesare arranged on the inner wall face of the valve core sleeve at intervals. The valve base is arranged at the lower end of the valve core sleeve and communicates with the inlet. The valve core is arranged in the valve core sleeve and connected with the valve core sleeve in a sliding manner. A curved surface sealing face matched with the valve base is arranged at the lower end of the valve core. The valve core is provided with multiple buffering sets at intervals in the axial direction. Each buffering set comprises two buffering grooves arranged symmetrically. The adjacent buffering sets are arranged in a staggering manner. When the curved surface sealing face is matched with the valve base, the buffering grooves and the ring-shaped bosses are partially overlapped. According to the controlvalve, the valve core, the valve core sleeve and the valve base are adopted, control over high-pressure-difference media is achieved, adjusting performance is good, and adjusting precision is high.

A cleaner head 1 comprising a housing 2, an agitator 3 and a drive assembly 4 for driving agitator 3. Drive assembly 4 comprises a dog 12 for transmitting torque to the agitator 3. One of the dog 12 and the agitator 3 comprises a tapered head 13, a shank 14 that extends from head 13, and a screw thread 15 formed around shank 14. The other of the dog 12 and the agitator 3 comprises a bore (19, Fig 5) having a countersink (20) and a complementary screw thread (21) formed around a wall of the bore (19). Shank 14 projects into bore (19) and the two threads 15 (21) mate such that, as dog 12 rotates, the agitator screws on to the dog and the tapered head 13 mates with the countersink (20). The screw thread has a maximum lead angle (see fig 3) of 60 degrees and each screw thread 15 (21) has a plurality of starts (22) and turns through a maximum angle of 360 degrees and a minimum angle of 120 degrees. Agitator 3 may be removed from cleaner head 1 and each screw thread has a buttress thread form. Other elements include electric motor 10, transmission 11, bushing 7 and removable cap 8.

The invention provides a six-axis light collaborative robot. A middle joint assembly comprises a middle joint shell. A third driver for driving a third joint of the six-axis light collaborative robotis arranged on the middle joint shell. A fourth driver and a fifth driver for driving a fourth joint and a fifth joint of the six-axis light collaborative robot respectively are arranged on one side of the third driver. A sixth driver for driving a sixth joint of the six-axis light collaborative robot is arranged at the other side of the third driver. The fourth driver, the fifth driver and the sixth driver are located inside the same plane, and output shafts of the drivers face the same direction. The six-axis light collaborative robot is compact in structure, convenient to assemble, capableof achieving production machining conveniently, higher in precision and longer in service life. Meanwhile, the six-axis light collaborative robot is easy to manufacture, low in cost and capable of achieving large-scale production and application.