57results about How to "Reduce the maximum load" patented technology

A computer implemented method, apparatus, and computer usable program product for symmetric and anti-symmetric control of aircraft flight control surfaces to reduce wing-body loads. Commands are sent to symmetrically deploy outboard control surfaces to shift wing air-loads inboard based on airplane state and speed brake deployment. Surface rate retraction on a wing with peak loads is limited to reduce maximum loads due to wheel checkback accompanied by utilization of opposite wing control surfaces to retain roll characteristics. Airloads are shifted inboard on a swept wing to move the center of pressure forward, thereby reducing the tail load required to perform a positive gravity maneuver. In a negative gravity maneuver, speed brakes are retracted, thereby reducing the positive tail load and reducing the aft body design loads. High gain feedback commands are filtered from wing structural modes above one hertz by a set of linear and non-linear filters.

The invention discloses an operation optimization method and device for a multi-energy system based on hydrogen energy and energy storage equipment. The system is composed of a fuel cell, an electrolytic cell, an absorption refrigerator, a waste heat recovery device, a photovoltaic power generation system, a solar water heater, a wind generating set, a hydrogen storage tank, a compressor, a hot water tank and a cold water tank. According to the operation optimization method, a scene tree method is adopted to solve the randomness problem; and according to predicted values and deviations of windpower, solar radiation intensity, power demand, cold demand and heat demand, expected scenes of wind power generation, photovoltaic power generation, solar heat production and user electricity cold and heat demand are established, and mixed integer linear optimization is performed on the system by taking the minimum average operation cost under all scenes as a target so as to research the operation strategy of the system. In the optimization problem, the operation strategies of the fuel cell and the absorption refrigerator in all situations are kept the same, and the operation strategies of the electrolytic cell, the hydrogen storage tank, the hot water tank and the cold water tank in different situations are variable, so that the purpose of absorbing renewable energy sources is achieved.

The invention relates to an offshore underwater component device mooring cable. The offshore underwater component device mooring cable is characterized by being of a sheath-core composite double-layer structure, an inner core is of a eight-strand structure made of DM20 ultra-high molecular weight polyethylene, an outer layer is a fixing sheath formed by weaving wear-proof high-strength polyester fibers, the inner core is formed according to the steps of manufacturing rough yarn, manufacturing rope yarn, manufacturing strands, weaving ropes, soaking the inner core in resin, prestretching the inner core and drying the inner core, and the fixing sheath is formed according to the steps of splicing threads, twisting the threads, manufacturing strands and weaving the 32 strands around the inner core into the fixing sheath in a one-off mode through a double-layer weaving machine.

The present invention provides a wind turbine generator and a blade pitch angle control method thereof in which an aerodynamic imbalance of a wind turbine rotor at the time of shutdown is further reduced, the maximum load of a wind turbine is further reduced, and the wind turbine generator can be reduced in weight and cost. The wind turbine generator includes a collective pitch angle controller 11 that produces a collective pitch angle demand that is common to blade pitch angles of wind turbine blades, an individual pitch angle producing unit 13 that produces an individual pitch angle demand inherent in each wind turbine blade, multipliers 21 to 23 that multiply the individual pitch angle demand by the individual pitch angle gain; an individual pitch angle gain producing unit 14, and adder 24 to 26 that add collective pitch angle demands to the output of the multipliers 21 to 23 and supply the same to pitch actuators 31 to 33 inherent in the wind turbine blades. When shutdown is performed, the individual pitch angle gain is adjusted such that an individual pitch angle gain is reduced gradually and reaches to zero by the individual pitch angle gain producing unit 14 after first set time.

A launch vehicle is deployed from an aircraft using gravity extraction of the launch vehicle with the aid of a small parachute which assists the extraction and damps the yaw and pitch of the launch vehicle. The launch vehicle is supported on two rows of tires which are rotatably mounted to the aircraft. Gravity and the drag force of the parachute causes the launch vehicle to roll on the tires along the load deck and out of the aircraft. Because the extraction forces are dominated by gravity, the launch vehicle acquires a rotation in the pitch axis as the launch vehicle leaves the aircraft. After the launch vehicle clears the aircraft, the launch vehicle rotates in the pitch plane, and is damped in the pitch plane by the parachute to a pitch attitude which is 70-80° and the vehicle engine is ignited, detaching the drag parachute.

The invention provides a cloud storage service system and a cloud storage service method. A task scheduler receives a request from a client and establishes a corresponding task. According to the task type of the task, a server is selected for the task through combining with a secondary random selection algorithm based on a task load queue size, thus the cloud storage service is provided via the server. According to the cloud storage service system and method, the flow scheduling problem of the computer cloud storage system is solved, the maximal load of the server is significantly reduced, and thereby the load balancing between the servers, the high throughput of the system and the relatively low task response delay are achieved.

The present invention relates to a control system for thrust-limiting of wind turbines, which wind turbine comprises at least one tower, which tower carries at least one nacelle which nacelle comprises a rotating shaft, which shaft is rotated by one or more blades, which blades at pitch regulated by a pitch control system. It is the object of the present invention to reduce mechanical load and stress of a wind turbine. A further object is to reduce the maximal load on tower of a wind turbine. The thrust-limiting control system performs control of the pitch angle, which thrust-limiting control system performs regulation of the pitch angle based on at least a first input from a wind estimator and a second input from a turbulence estimator. By thrust-limiting control, reduction in the maximum mechanical load on a tower, or maybe also a nacelle, can be achieved by a relatively high percentage of the load in a way where it has only very limited influence on the power production of the wind turbine.

An elevator includes an elevator hoistway with an elevator car arranged to move therein. The elevator car includes an interior bounded by at least the elevator care roof. A frame structure includes two parallel, horizontal, elongated roof beams that are at a horizontal distance from each other. Between the roof beams is a trough that has an upward-facing base surface, and a standing platform in connection with the roof of the elevator car that includes a standing surface, immediately above which is a space free of the parts of the elevator car and free of the ropes of the elevator, for enabling standing on top of the standing surface at least when the elevator car is situated at a distance from the top end of the elevator hoistway. The standing surface forms at least a part of the base surface of the trough.

The present embodiments related to a device having a device element to which a high voltage can be applied. The device is provided with at least one additional conducting element which is disposed, embodied and connected in such a way that the element is assigned a defined potential value and a change to the electric field generated by the high voltage in the sense of a more favorable field distribution is effected by means of position, shape and potential value. According to the invention, maximum loads on switching elements are avoided and undesirable phenomena such as voltage breakdowns or flow voltages are counteracted as a result of the more favorable field distribution.

Provided is a printer in which a cut-off paper is pushed into a paper stacking portion without an additional power source while reducing the maximum load applied to driving means for driving a movable blade. A printer includes a movable blade for cutting a paper disposed between a fixed blade and a movable blade as it moves in a forward direction and separating a printed part as a cut-off paper; driving means for moving the movable blade in a reciprocating manner; a pushing member which is driven to push a cut-off paper in a thickness direction of the cut-off paper; a paper stacking portion for stacking the cut-off paper pushed by the pushing member; and a driving force transferring mechanism for transferring a driving force of the driving means to the pushing member to drive the pushing member.

The invention belongs to the field of the network control and management and software definition network, and provides an optimization controller deployment method based on a bat algorithm, the load and the propagation delay of the controller are considered so as to determine the optimal number and location of the controller. Through the SDN controller deployment method based on the bat algorithm,each bat represents a deployment strategy pi=(theta1, phi(theta1)), (theta2, phi(theta2)),..., (thetak, phi(thetak)), namely, a controller deployment scheme; the strategy is the cluster divided intok controllers, thetai is the location of the controller, phi(thetai) is a switch set of the thetai control, if the network G has N switches, and E paths, the location Xi of each bat is equal to {x1, x2,...,Xn}, each element in the Xi represents the controller subordinated to each switch, so that N elements are existent, the speed of each bat is Vi={v1, v2,...,vn}(vj belongs to[0,1]), if some element is 1, the location element of the bat can be updated, or cannot be updated so as to find the bat with the optimal strategy, namely, the optimal controller deployment strategy. The deployment disclosed by the invention is mainly applied to the network controller and management occasion.

A computer implemented method, apparatus, and computer usable program product for symmetric and anti-symmetric control of aircraft flight control surfaces to reduce wing-body loads. Commands are sent to symmetrically deploy outboard control surfaces to shift wing air-loads inboard based on airplane state and speed brake deployment. Surface rate retraction on a wing with peak loads is limited to reduce maximum loads due to wheel checkback accompanied by utilization of opposite wing control surfaces to retain roll characteristics. Airloads are shifted inboard on a swept wing to move the center of pressure forward, thereby reducing the tail load required to perform a positive gravity maneuver. In a negative gravity maneuver, speed brakes are retracted, thereby reducing the positive tail load and reducing the aft body design loads. High gain feedback commands are filtered from wing structural modes above one hertz by a set of linear and non-linear filters.

The invention discloses a user adjustable load resource demand response method and system based on a virtual power plant. The method comprises the following steps: collecting and obtaining a user to be investigated according to an industry attribute and an electrical load of each user; identifying a to-be-investigated user with load adjustable equipment as a user participating in power demand response, and collecting adjustable load resources of the users; establishing an adjustable load technical economic model based on marginal cost, and establishing a capacity model of the maximum adjustable load based on safety constraints; therefore, an electric power real-time demand response adjustment algorithm model is formed; and when the demand response item is started, the operation state and the adjustable load resource of the adjustable load equipment of each user are taken as input data, and the power real-time demand response adjustment algorithm model is utilized to calculate the load regulation and control index of each user and carry out load regulation and control. According to the method, the power peak load is reduced, economic and reputation loss caused by orderly power utilization of the power grid is avoided, the maximum load of equipment at the peak load is reduced, and the operation capability of the power grid is improved.

The invention discloses a compressor with a two-grade scroll structure. The compressor comprises a shell; a transverse straight driving crankshaft is arranged in the shell; a bearing support I is mounted at one end of the bearing crankshaft; a fixed scroll I and a movable scroll I are mounted on the outer side of the bearing support I; a rotation preventing mechanism I is mounted between the movable scroll I and the bearing support I; a bearing support II is mounted at the other end of the driving crankshaft; a fixed scroll II and a movable scroll II are mounted on the outer side of the bearing support II; a rotation preventing mechanism II is mounted between the movable scroll II and the bearing support II; a high / low-pressure isolation plate is mounted on the outer side of the fixed scroll II; two ends of the shell are sealed through end covers to form a closed cavity; and two cavities separated by the high / low-pressure isolation plate respectively communicate with an intake pipe andan exhaust pipe. The operation range of the compressor is widened; the efficiency of the compressor is improved; and in particular, under low-temperature working conditions, two sets of scroll and support structures are adopted to share the load of the compressor, so that the life of the compressor is greatly prolonged, and the operation reliability of the compressor is greatly improved.

The invention refers to a method for enhancing the rectification ability of roll reeler. The method is: 1). the number of rolls can be decreased or reduced; 2). the moving roll row can lift parallel and integral tilt; 3) adopts one or more of increasing the roller spacing of working roll, the roller radius of working roller, the quantity of supporting rollers, the bearing ability of supporting roller. The invention develops the reforming ability and application range.

The invention discloses a petroleum drilling machine achieving continuous motion of tripping in and tripping out. The petroleum drilling machine comprises a top driving lifting mechanism and a rotating disc lifting mechanism. According to the structure of the rotating disc lifting mechanism, the left inner side and the right inner side of a derrick are each provided with a rotating disc guide rail, each rotating disc guide rail is provided with a tackle and a set of rotating disc beam guiding mechanism, and each tackle is located above the corresponding rotating disc beam guiding mechanism; each tackle is downwards hinged to an end head of a piston rod of an oil cylinder, and a cylinder body of each oil cylinder is fixed to the derrick; a fixed pulley on each tackle is wound with a rotating disc lifting rope, one end of each rotating disc lifting rope is downwards fixed to a drilling machine base, and the other end of each rotating disc lifting rope is fixed to a rotating disc beam; and the two sets of rotating disc beam guiding mechanisms are fixedly connected with the two sides of the rotating disc beam correspondingly. The invention further discloses a method for continuous motion of tripping in and tripping out. The petroleum drilling machine achieving continuous motion of tripping in and tripping out is compact in structure, the method for continuous motion of tripping in and tripping out is reliable, and efficiency of continuous motion of tripping in and tripping out is high.

The invention provides a refrigerator, the refrigerating chamber, the freezing chamber and the temperature-changing chamber of the refrigerator are respectively provided with a refrigerating evaporator, a freezing evaporator and a variable-temperature evaporator, and the first port of the refrigerating evaporator and the first port of the freezing evaporator are connected with each other. The first port of the condenser is connected, and a first electromagnetic valve is arranged between the refrigerating evaporator, the refrigerating evaporator and the condenser, and the first electromagnetic valve can control the on-off of the refrigerating evaporator and / or the refrigerating evaporator; Both the second port of the refrigerator and the second port of the freezing evaporator are connected with the first port of the variable temperature evaporator, and the second port of the variable temperature evaporator is connected with the inlet of the compressor. The refrigerator provided by the invention can realize the independent operation of the refrigerating evaporator and the freezing evaporator, achieve dual temperature and dual control, reduce the maximum load of the compressor, and prevent food odors; The amount can be used in the temperature-changing greenhouse to make full use of the cooling capacity and improve the energy efficiency of the refrigeration system.

An object is deployed from an aircraft using gravity extraction of the object with the aid of a small parachute. The object is restrained in the fore and aft directions on either side of the center of gravity by fore and aft loading chains which hold the object to a loading deck. The chains are attached to the object by pear shaped rings mounted to a load plate. The load plate is supported on a lower attachment plate mounted to the object and is attached by a pin to an upper attachment plate also mounted to the object. Pulling the pin causes the load plate to rotate about a hinge formed on the lower attachment plate followed by release of the load plate from the lower attachment plate and the object to be deployed.

The present embodiments related to a device having a device element to which a high voltage can be applied. The device is provided with at least one additional conducting element which is disposed, embodied and connected in such a way that the element is assigned a defined potential value and a change to the electric field generated by the high voltage in the sense of a more favorable field distribution is effected by means of position, shape and potential value. According to the invention, maximum loads on switching elements are avoided and undesirable phenomena such as voltage breakdowns or flow voltages are counteracted as a result of the more favorable field distribution.

The invention discloses a dual-cylinder rotation type compressor and a refrigerator with same. The dual-cylinder rotation type compressor comprises a shell and a compression mechanism, wherein the compression mechanism comprises an air cylinder component and two pistons; the air cylinder component comprises two air cylinders; each air cylinder comprises two slide sheet grooves; the two slide sheet grooves of each air cylinder are radially and symmetrically arranged; each slide sheet groove is internally provided with a slide sheet which is suitable for butting against the outer peripheral wall of the corresponding piston; and two slide sheets in each air cylinder are matched with the corresponding pistons so as to define two compression cavities. According to the dual-cylinder rotation type compressor provided by the invention, the slide loss of an eccentric shaft and the failure of the eccentric shaft are reduced, and the noise caused by the vibration and air exhaust of the compressor is reduced.

The invention discloses a conveying belt tensioning device and a belt conveyor. The conveying belt tensioning device comprises a support (3), a connecting rope (6), a first pulley (4) fixed to the support (3) and used for changing the direction of the connecting rope (6), and a balance weight (2) used for tensioning the connecting rope (6). The conveying belt tensioning device further comprises a connecting rope collecting and releasing device (7) used for releasing or collecting the connecting rope (6) so that when the belt conveyor works, the connecting rope (6) can be released or collected according to the stress conditions of the connecting rope (6), and the position of the balance weight (2) can keep unchanged or basically keep unchanged. By means of the conveying belt tensioning device, the maximum load borne by the connecting rope and a connecting piece can be reduced, and therefore the connecting failure is avoided.

The invention relates to a damping comb type expansion joint. A damping comb type expansion joint device comprises a damping waterproof soft mat layer, a comb plate, an anchor bolt, a pull rod assembly, an end supporting metal plate, a cement base and the like. In the process of vehicle load passing through a bridge expansion joint and the comb plate warping for vibration, the expansion joint caneffectively weaken non-symmetry vibration, weaken the upper pulling force of the anchor bolt, and buffer the impact compression of the rear portion of the comb plate to the cement base when the comb plate is warped, so that the cement base is prevented from detachment damage. The economic cost is saved and the service life of the expansion joint is prolonged through the design.

An aircraft landing gear 2 is disclosed having a first arm 6a configured to have one or more wheels 8a mounted at one end, the first arm 6a being configured for mounting to a pivot 10a. The landing gear 2 includes a second arm 6b configured to have one or more wheels 8b mounted at one end, the second arm 6b being configured for mounting to a pivot 10b. The landing gear 2 further includes a first link 18a pivotally coupled to the first arm 6a, a second link 18b pivotally coupled to the second arm 6b; and a main link 20 pivotally coupled to each of the first and second links 18a, 18b and to a shock absorber 22 arranged to provide a biasing force via (i) the main linkage 20 and the first link 18a which opposes rotation of the first arm 6a about the pivot 10a and (ii) the main linkage 20 and the second link 18b which opposes rotation of the second arm 6b about the pivot 10b.

A method for driving a plurality of actuators having an output stage having multiple channels, by way of whose channels boost currents are conveyed to the actuators. In this method, a check is made as to whether rising edges of multiple boost currents are present simultaneously (rising edge collision). Upon the identification of simultaneously present rising edges, at least one of the boost currents is conveyed in time-offset fashion to the associated actuator.

A hoisting system for the at least one of an installation, a decommissioning and a maintenance of a wind turbine which comprises at least a foundation, a tower, a yawing part and a rotor of at least 80 m diameter with at least one blade, comprising a first hoisting device which comprises measures to establish a load carrying joint with an already built part of the wind turbine which is located above the foundation, wherein the hoisting system is characterized in that the ratio between the maximum hoist load of the hoisting device and the mass of the heaviest part is larger than 0.2 and smaller than 1 and in particular smaller than 0.8 and more in particular smaller than 0.7 and preferably smaller than 0.6, with the heaviest part being a heaviest part which is hoisted as one piece and which belongs to the yawing part of wind turbine.

The invention provides a full-filled and oil-discharged double-acting oil pump. The oil pumpcomprises a fixed structure and a movable structure; the upper end of the fixed structure is connected withan oil pipe; the movable structure is mounted in the fixed structure, and can move in the fixed structure up and down; an outer pipe sleeves the fixed structure from top to bottom; the bottom end of the outer pipe is arranged on a fixed-pressure valve for keeping seal, and the upper end is fixed through a pressing cap; and the pressing cap is in threaded fixation with an exhaust valve. The outer pipe is a necessary conventional fitting of the oil pump, and is used for preventing the extrusion deformation of a bent well section of a pump drum, the vibration during working of the pump and accidents caused by looseness and unlocking of pipe columns due to the well wall collision. The technical scheme solves such problems as need of adding an oil discharger and environmental pollution easily caused by no air preventing measure, oil-air mixed pumping, low oil pumping efficiency and no oil discharging function in a traditional oil pump.

An external gear (4) of a dual-type wave gear device (1) is provided with first and second external teeth (7, 8), the numbers of which differ, and gaps (9) formed therebetween that serve as the cutter clearance areas for a tooth-cutting cutter. The maximum width (L1) of the gaps (9) is 0.1-0.3 times the width (L) of the external gear. The depth from the tooth crests of the first external teeth (7) to the deepest area (9a) of the gaps (9) is 0.9-1.3 times the tooth depth of the first external teeth. The depth from the tooth crests of the second external teeth (8) to the deepest area (9a) is 0.9-1.3 times the tooth depth of the second external teeth. The tooth root fatigue strength of the external gear provided with differing numbers of first and second external teeth is increased, making it possible to achieve a wave gear device with high load capacity and small speed ratio.

The invention discloses an operation optimization method and device for a multi-energy system based on hydrogen energy and energy storage equipment. The system consists of a fuel cell, an electrolytic cell, an absorption refrigerator, a waste heat recovery device, a photovoltaic power generation system, a solar water heater, and a wind power generator set , hydrogen storage tank, compressor, hot water tank and cold water tank. This method adopts the scenario tree method to solve the randomness problem. According to the predicted values ​​and deviations of wind force, solar radiation intensity, electricity demand, cooling demand, and heat demand, a scenario of wind power generation, photovoltaic power generation, solar heat production, and user electric cooling and heating demand is established. In anticipation scenarios, with the goal of minimizing the average operating cost in all scenarios, the mixed integer linear optimization of the system is carried out to study the operating strategy of the system. In this optimization problem, the operating strategies of the fuel cell and the absorption chiller are kept the same in all scenarios, while the operating strategies of the electrolyzer, hydrogen storage tank, hot water tank and cold water tank are variable in different scenarios to achieve The purpose of absorbing renewable energy.