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

A computer controlled hydraulic resistance device for apparatus such as a prosthetic knee for above knee amputees, includes a two stage pilot operated solenoid valve connected to control the flow of hydraulic fluid to and from a hydraulic actuator which applies resistance to the prosthetic knee or other apparatus through a coupling. Hydraulic pressure is sensed on the high and low side of the actuator by a spring biased magnet and a magnetically actuated electronic sensor and is used by a micro-controller in a closed-loop manner to compensate automatically for variations in the device and in the hydraulic fluid viscosity. The device also has magnetically actuated electronic sensors which sense positions of the apparatus and feed back to the micro-controller for applying a predetermined resistance profile to the apparatus.

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.

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 powertrain assembly for transmitting torque between a power source and a transmission includes an input shaft, a housing on which the input shaft is rotatably supported, a flywheel rotatably supported at two axially spaced locations, at least one of the locations providing support for the flywheel on the housing, and a clutch for driveably connecting and disconnecting the flywheel and the input shaft.

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 disclose a pneumatic corrugated pipe three-way adjusting valve, which comprises an actuating mechanism and a valve part arranged below the actuating mechanism, wherein the valve part comprises a three-way valve body, an upper valve base, a lower valve base, a valve core component, a valve rod, an upper valve cover, a lower valve cover and the like, wherein the upper and lower valve bases are connected with the valve body through five screw threads; and the valve part has a dual-layer sealing structure formed by a stainless metal corrugated pipe and a polytetrafluoroethylene V-shaped filler, so that a medium is prevented from leaking. A high-rigidity air cylinder type actuating mechanism is provided, and unbalance force generated by a very high fluid can be resisted, so that the pneumatic corrugated pipe three-way adjusting valve can be opened and closed optionally on converging and shunting occasions; and if a converging occasion is required to be changed into a shunting occasion or a shunting occasion is required to be changed into a converging occasion due to process change, or a user selects a wrong valve, the three-way valve can be used without being replaced, so that unnecessary troubles are reduced, and funds are saved for the user.

The invention discloses a combined stringing tool used for line conductor stringing. The combined stringing tool comprises a fixed pulley, a first stringing tackle, a second stringing tackle, a winching, a haulage cable, a tackle fixing plate and a ball head line clamping device. The fixed pulley is fixed to the top end of a tower. The tackle fixing plate is fixed to a cross arm of the tower. The second stringing tackle is fixed to the tackle fixing plate. The first stringing tackle is fixed at the bottom end of the tower. The winching is fixed to the ground. The haulage cable is wound around the winching. The haulage cable which is drawn out from the winching is sequentially wound around the first stringing tackle, the fixed pulley and the second stringing tackle, and then is fastened up to the ball head line clamping device. In the stringing process, a line conductor can be strung as long as the winching is rotated to pull the haulage cable. The combined stringing tool has the advantages of being capable of improving safety and reliability of electric transmission line conductor stringing, improving stringing efficiency and lowering labor intensity of workers on the tower, reducing the number of the workers, being low in construction difficulty and the like.

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 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.

The invention discloses an aerial photography based on stepping framing type image and an aerial photography method, and relates to the technical field of imaging. The invention solves the problems of complex structure, big volume, heavy device, fixed shooting angle and high price of the existing area array aerial photography. The aerial photography based on stepping framing type image comprises a stable platform, a POS system, a hanging arm, a motor, a steering engine, a camera, an encoder, a camera installing plate, a camera adapter, and a pin board; a swaying mechanism is hung at the lower part of the stable platform through the hanging arm structure, the pin board is erected at the upper part of the stable platform, and the POS system is mounted; the center of the POS system is aligned to a rotary shaft of the framework in the stable platform, both sides of the hanging arm are equipped with a motor and an encoder, the inside is fixed with the camera through the camera installing plate; the steering engine is fixed at inside of the camera installing plate. Through driving the motor, the front and back swaying movements of the swaying mechanism are realized, a big vision field swaying imaging is realized; a lateral image shift is compensated by means of the shooting mode of start-stop for many times; the camera and the high-precision POS system are miniaturized and integrated, the large-width high-resolution imaging is realized.

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 dynamic balance adjusting system of a centrifugal machine. A main shaft is provided with a central through hole on which an oil path can be laid. The oil path A and the oil path B are symmetrical, and both are started from an oil station, penetrate out of a central through hole of the main shaft, reach the arm support and are laid towards the two ends in the length direction of the arm support respectively, and when the ends of the arm support are reached, a pipeline is divided into two parts through a three-way pipe connector and then laid to central holes of the twotension belts respectively and fixed to the ends of the central holes of the tension belts. According to the adjusting system, the ground oil station is controlled, oil is conveyed to the rotary armthrough the rotary joint, and then a proper amount of oil is injected into the weight reduction center holes of the two tension belts at one end of the rotary arm, so that the purpose of dynamic balance adjustment is achieved. According to the invention, dynamic adjustment of large unbalanced force can be realized, and the space of the rotating arm is not occupied.

The invention discloses a high-speed geotechnical centrifugal machine structure. By means of a symmetrical pocket-mounted integrally-forged rotating arm structure, horizontal sliding type symmetricalhanging basket structures and a transmission supporting structure which adopts three-fulcrum arrangement and the combination of hydrodynamic and hydrostatic sliding bearings and rolling bearings, thesituations that the capacity of a high-speed centrifugal machine can be equal to 1500gt, and the highest centrifugal acceleration can be equal to 1500g are ensured. In addition, by means of the symmetrical pocket-mounted integrally-forged rotating arm structure, the situation that the structure of the centrifugal machine can bear the load in the centrifugal field with the acceleration of being 1500g and the enormous centrifugal force generated by the structure of the centrifugal machine can be ensured; by means of the horizontal sliding type symmetrical hanging basket structures, the situations that the unbalanced force generated in the running process of the centrifugal machine is low, and the smooth running condition is met are ensured; and by means of the transmission supporting structure which adopts three-fulcrum arrangement and the combination of the hydrodynamic and hydrostatic sliding bearings and the rolling bearings, the enough supporting force is provided for the high-speedrunning of the centrifugal machine, the vibration is effectively controlled, the resonance which possibly happens between the centrifugal machine and the capital construction is avoided, and the situation that the acceleration of the centrifugal machine can be equal to 1500g is ensured.

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 relates to a double-diaphragm pressure stabilizer. The double-diaphragm pressure stabilizer comprises an upper cover, a valve body and a lower cover. The upper cover is provided with a first groove, a first accommodating groove and a first air inlet hole. The valve body is provided with a second groove, a third groove, a channel, a valve port, a second air inlet and an air outlet. The lower cover is provided with a fourth groove. The double-diaphragm pressure stabilizer further comprises an upper diaphragm, a lower diaphragm and a pressure stabilizing spring. The periphery of theupper diaphragm is pressed between the upper cover and the valve body. A first upper disc and a first lower disc are correspondingly arranged on the upper side and the lower side of the upper diaphragm. The periphery of the lower diaphragm is squeezed between the valve body and the lower cover. A second upper disc and a second lower disc are correspondingly arranged on the upper side and the lower side of the lower diaphragm. A rubber valve pad right opposite to the valve port is arranged on the upper lateral side of the second upper disc. The second upper disc is fixedly connected with the first lower disc through a connecting piece. The pressure stabilizing spring is located in the first accommodating groove, and the lower end of the pressure stabilizing spring is pressed on the first upper disc. The double-diaphragm pressure stabilizer has the advantages of being simple in structure, sensitive in action, safe, reliable, good in stability and high in pressure stabilization precision.

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.

The invention discloses a transmission line mechanical deicing sequence optimizing method based on differential evolution algorithm, comprising the following steps: first, generating a population; then establishing a fitness function and formulating a differential evolution algorithm strategy; and finally generating a deicing sequence generation and optimization process. The method of the invention can solve the problem that the de-icing sequence of a currently available mechanical de-icing process is not considered, which causes the pole tower to bear imbalance force exceeding the designed strength of the pole tower and causes the pole tower malfunction. The method strikes a balance between the pole tower safety and the deicing route and ensures that the force exerted on the line and the pole tower does not go beyond the safety threshold and that the deicing route is the smallest when mechanical deicing work is performed according to the optimized deicing sequence.