61results about How to "Reduce design load" patented technology

A horizontal axis wind turbine includes: a rotor having a hub and at least two or more blades; a nacelle for pivotally supporting the rotor through a rotating shaft connected to the hub; a tower for supporting the nacelle; and an independent pitch control unit capable of independently controlling pitch angles of the blades, respectively, wherein the independent pitch control units control the pitch angles so that all the blades are made in a full feather position in case of a wind speed not less than a predetermined value, and subsequently controls the pitch angles of the respective blades so as to be sequentially reversed one by one, and further subsequently, carries out control so that the wind turbine idles in an all-blade negative feather position where the pitch angles of all the blades are reversed.

An electrical cable has a plurality of generally rectangular cross-section conductors superposed in a stack, the stack surrounded by a polymer jacket. The stack may be provided with a lubrication layer provided between at least two of the conductors. Conductors of the stack may have a thickness that is greater proximate the middle of the stack than at the top and bottom of the stack and/or a width that is less at the top and the bottom than at the middle. Further stacks may also be provided parallel and coplanar with the first stack, also surrounded by the polymer jacket.

The invention relates to a pretension and lay-off method of a crane jib for a ship, belonging to the technical field of a crane. The crane comprises a luffing mechanism composed of a top pulley block, a jib, a winch, a luffing wire rope and a jib head pulley block and a bracket. The method comprises the following steps: A. operating the winch in the forward direction, loosening the jib and layingoff the jib onto the bracket; and B, operating the winch in the reverse direction, pulling the jib upwards to enable the pressure of the jib on the bracket to be less than the pressure on the bracketbefore being subjected to the upward pull, and stopping and shutting off the winch. The invention also relates to a pretension and lay-off device of a crane jib for a ship. The luffing mechanism alsocomprises a middle pulley arranged at the middle of the jib, and the luffing wire rope is connected with the jib head pulley block and the middle pulley through the top pulley block. The pretension and lay-off method and device of a crane jib for a ship can produce a pretension force on the jib by means of the luffing wire rope, thereby reducing the self-weight load of the jib as well as the influence and the destruction on the jib structure as a result of the shock load and the changing load of the bracket on the jib. Besides, the invention has the advantages of simple method and structure, convenient operation and low cost.

The invention provides a morphing wing trailing edge driven based on shape memory alloy and a deflection method thereof. The trailing edge is partially wound on an insulating rod by utilizing an SMA wire; through heating the SMA wire, the rotation of the insulating rod is realized by utilizing the shape memory effect of the SMA wire; the insulating rod is connected with a worm, so that a traditional motor is replaced for driving; a trailing edge flap is divided into two parts: an upper part and a lower part; according to the deflection method provided by the invention, through the rotation of one worm, two worm wheels are simultaneously driven to rotate, so that upper and lower wing ribs simultaneously deflect from equilibrium positions to limiting positions, and through changing the transmission ratios of the worm wheels and the worm, the deflection of the upper and the lower wing ribs at different angles can be realized.

A complex-operation input device having an operable knob held in a rotatable and slidable manner includes a rotation sensor that detects rotation of the operable knob on the basis of displacement of a second detected portion, and a slide sensor that detects sliding of the operable knob on the basis of displacement of a first detected portion. The direction in which the second detected portion moves with the sliding of the operable knob is substantially orthogonal to a rotation axis about which the operable knob rotates. The slide sensor is disposed such that, when the operable knob is slid, the slide sensor detects the sliding before the rotation sensor detects the displacement of the second detected portion.

The invention relates to the technical field of the oil-gas recovery technology of the storage tank and in particular to an oil-gas recovering system of a storage tank and a control method thereof. The provided oil-gas recovering system of the storage tank comprises the storage tank, a fluid distributing tank, a first compressor, a second compressor, a first separating tank, a second separating tank, a balance tank, an oil-gas recovering device and a buffering tank. The storage tank is successively connected with the fluid distributing tank, the first compressor, the first separating tank and the balance tank. The balance tank is respectively connected with the fluid distributing tank and the storage tank to form an oil-gas balance system. The storage tank is successively connected with the fluid distributing tank, the second compressor, the second separating tank, the oil-gas recovering device, the buffering tank and the storage tank to form the oil-gas recovering system. The oil-gas recovering system of the storage tank is capable of, through the setting of the balance tank, reducing the design load of the oil-gas recovering device, maintaining the stable running of the oil-gas recovering device, avoiding the frequent and great alternating running of the device, reducing the alternating fatigue of the device, and reducing the safety risk. The compared with the current oil-gas recovering device, the design load is reduced by 50%-80%.

The invention relates to the field of flight control, in particular to a design method of a flap driving mechanism and the flap driving mechanism, and aims to solve the problem that the driving mechanism is low in use efficiency when an aircraft flap is loaded heavily and deflects a large angle. According to the design method of the flap driving mechanism, on the basis that a universal coupling is in an original state, a driven shaft is rotated by a preset angle around a hinge point in the anti-clockwise direction, and the current state of the universal coupling is used as the original state to be designed, so that the efficiency loss of the universal coupling is reduced when the flap is driven to rotate by the same angle, and the efficiency of the driving mechanism is greatly improved; meanwhile, on the premise that the external driving load of by the flap driving mechanism remains unchanged, the design load of the driving mechanism is reduced, the design weight of the driving mechanism is reduced, and the reliability of the driving mechanism is improved; the principle is simple and practical, and easy to implement.

A touch panel enabling a repeat arrangement with a small design load, and a mesh pattern with a high degree of freedom and does not generate moire, and a display device comprising same. A touch panel in which a drive electrode pattern/sensing electrode pattern include: first main electrode wires/second main electrode wires constituting line segments having a linear shape extending along a first wire direction/second wire direction; and first auxiliary electrode wires/second auxiliary electrode wires constituting line segments having a linear shape extending along the second wire direction/first wire direction and joining the first main electrode wires/second main electrode wires, and respective end points of the first main electrode wires/second main electrode wires are connected to end points of the closest first main electrode wire/second main electrode wire in adjacent nodes, by connecting wires having a different angle of inclination from the first main electrode wires/second main electrode wires.

The invention relates to the field of hoisting machinery, in particular to a low-speed outer rotor permanent magnet drive device with a rotating speed of an outer cylinder of 0.001-30r/min. The device comprises brakes, a winding, a permanent magnet, a central shaft, the outer cylinder, an iron core, a bearing, fixed seats and a frequency converter, wherein the brakes are arranged at both ends in the outer cylinder and fixed to the central shaft; the permanent magnet is installed on the inner wall of the outer cylinder; the outer cylinder is fixed to the central shaft by the bearing; the winding is embedded into the iron core; the iron core is installed on the central shaft to be connected into a whole; the central shaft is fixed in the fixed seats at both ends; and the frequency converteris connected with the winding by an output line. The invention has the two characteristics of simple structure and realization of large-torque output under the low speed condition, and also has the advantages of light weight, high reliability, stable running, microseism, low noise, safety, energy saving and long service life.

The invention provides a gangway structure for connecting a floating bridge with a floating platform and belongs to the technical field of floating bridge connection. The gangway structure for connecting the floating bridge with the floating platform comprises the floating bridge, the floating platform, footplates, a gangway and supporting limiting frames, wherein the footplates are arranged on the floating bridge and the floating platform; the gangway is hinged between the footplates of the floating platform and the floating bridge; and the supporting limiting frames are hinged on the floating bridge and the floating platform. According to the gangway structure for connecting the floating bridge with the floating platform, as a platform footplate is hinged on a floating bridge platform and the platform footplate is matched with a truss type gangway, the adapted draft difference is great and the adaptation is high; as the supporting limiting frames are arranged and a main support is arranged in the form of a double A-shaped truss, the position of the gangway structure between the floating platform and the floating bridge is effectively limited at a maximum draft difference and at a minimum draft difference so as to ensure that vehicles can safely pass; damage of the bridge body caused by collision between the floating bridge and the floating platform can be avoided; and moreover, the design load of the truss type gangway is reduced, the weight of the structure is reduced and the safety is enhanced.

The invention discloses a multipurpose precast concrete component production line. The production line comprises a special-shaped component operation area, a plate component operation area and a concrete stirring operation area and further comprises a plurality of concrete mixing main machines, a plurality of online empty mold operation mold conveying channels, a plurality of off-line empty mold operation stations, a plurality of mold transverse moving devices using circulating chains, a plurality of combined primary and secondary mold carriers, a plurality of secondary overlapping devices, aplurality of pouring points, a concrete conveying elevated track arranged from a concrete stirring operation area to the pouring points, and a plurality of self-propelled concrete conveying elevated hoppers. The invention further discloses a using method of the multipurpose precast concrete component production line. The production line is advantaged in that the production line is reasonable and ingenious in structural design, suitable for simultaneous online production of precast concrete components needing different curing systems, and suitable for simultaneous online production of the precast concrete components needing different empty mold operation time.

The invention relates to a calculating method for design load of a natural gas distributed energy resource. The calculating method is characterized by comprising the following steps: obtaining energy consumption unit properties of different types of buildings and enterprises and users with different functions in an area, building or industrial park; calculating yearly energy loss curves of different energy consumption units; calculating user load delay curves by means of the demand side response principle with the combination of user requirements; adding the user load delay curves and the yearly energy loss curves together to obtain the yearly load distribution situations of the users, and making peak load serve as the design load of installation of a distributed energy resource station. By means of the calculating method for design load of the natural gas distributed energy resource, the conflict between energy supply and energy consumption and the conflict between energy supplying and energy saving can be effectively settled, and the problem that an installation scheme is not matched with the load due to large load is solved. By means of a distributed energy supplying system designed through the method, the optimal economical efficiency can be achieved whether from the view point of energy supply or from the view point of energy consumption.

A pad return spring for a caliper body. The caliper body has an elongated element connecting bridge connecting a first elongated wheel-side element to a second elongated wheel-side element and having a middle connecting bridge defining an outer middle bridge side, an inner middle bridge side, a middle bridge disc inlet side, and an opposite middle bridge disc outlet side. The pad return spring has a first and a second pad retraction elements, each defining a middle stretch, a first side stretch influencing the first pad, and an opposite second side stretch influencing the second pad to move the first and second pads away from the first and second braking surfaces at the end of a braking action, and an elongated connecting element connecting the first and second pad retraction elements to each other, and an anchoring device to removably restrain the pad return spring to the middle connecting bridge.

The invention discloses a double-layer horizontal sedimentation tank for drinking water purification of surface water. The double-layer horizontal sedimentation tank comprises an upper layer tank body and a lower layer tank body; a water inlet perforated wall is arranged at the position of a water inlet on the right of the lower layer tank body; the lower layer tank body is communicated with the upper layer tank body through a water inlet perforated wall arranged on the inner left side of the upper layer tank body; a plurality of rows of sludge hoppers are arranged in the lower layer tank body; sludge discharge pipes are arranged at the bottoms among each row of the sludge hoppers, and the upper ends of the sludge discharge pipes are communicated with a sludge discharge main pipe; the tank bottom slope of a sludge discharge area in the upper layer tank body is equal to or larger than 0.01; a single row of sludge hoppers are arranged at the slope bottom on the right side of the sludge discharge area in the upper layer tank body; a sludge scrapping traveler is arranged on the upper layer tank body, and used for scrapping sludge from the bottom of the upper layer tank body; finger-type effluent weirs are arranged on the upper right part of the upper layer tank body; a water collection main pipe is arranged at the tail ends of the finger-type effluent weirs. Through the adoption of the double-layer horizontal sedimentation tank, the problems of unsmooth sludge discharge due to a hydrostatic pressure manner adopted by the conventional horizontal sedimentation tank, a relatively large occupied area of the conventional horizontal sedimentation tank and the like are solved.

The invention discloses a flexible wind wheel locking device for a braking system of an anti-typhoon wind generating set. With the adoption of a flexible wind wheel locking design scheme, the flexiblewind wheel locking device comprises two rope retracting devices which are symmetrically distributed on the left side and right side of a front flange of a gearbox and connected with the left end andthe right end of a swinging trolley; and the swinging trolley is integrated with a housing of a wind wheel locking pin assembly of the braking system, and can move in an arc guide slot hole of the front flange of the gearbox to drive the rope retracting device on the left side or the right side to be tightened, and at the same time to drive one of guide posts in the center of the bottom of the front flange of the gearbox to be pulled out, so that a spring sleeving the guide post is compressed to provide restoring force to a wind wheel. According to the invention, the wind wheel is allowed to swing within a certain angle, and the greater the angle deviation from the positive Y position is, the greater the restoring force is, so that the load of the wind wheel and the whole machine is greatly reduced, and the overall design difficulty of the wind generating set is greatly reduced.

The invention discloses a flexible wind wheel locking device for a braking system of an anti-typhoon wind generating set. The flexible wind wheel locking device adopts a flexible wind wheel locking design scheme. The flexible wind wheel locking device comprises a swinging trolley and two flexible wind wheel locking units; the two flexible wind wheel locking units are symmetrically distributed on the left side and right side of a front flange of a gearbox and connected with the left end and the right end of the swinging trolley; and the swinging trolley is integrated with a housing of a wind wheel locking pin assembly of the braking system, and can move in an arc guide slot hole of the front flange of the gearbox to drive a wire rope group on the left side or the right side to be tightened,and at the same time to drive a guide post of the flexible wind wheel locking unit on one side to be pulled out, so that a spring sleeving the guide post is compressed to provide restoring force to awind wheel. According to the invention, the wind wheel is allowed to swing within a certain angle, and the greater the angle deviation from the positive Y position is, the greater the restoring forceis, so that the load of the wind wheel and the whole machine is greatly reduced, and the overall design difficulty of the wind generating set is greatly reduced.

The invention discloses a vacuum pump system combining three stages of booster pumps and water ring pumps. The vacuum pump system comprises a booster pump B1 communicating to a waste gas generating position, and an output end of the booster pump B1 is sequentially connected with a booster pump B2, a booster pump C3, a condenser C1 and water ring pump units; exhaust ports of the water ring pumps ofwater ring pump units are connected with waste gas outlets, and the water ring pump units are W4 water ring pump units; after working modes of the water ring pumps are selected and confirmed, a vacuum system is started; and all stages of vacuum pumps are started and stopped according to preset vacuum pressure values until a vacuum degree required by a process is met. The vacuum pump system has the characteristics of meeting requirements of the refining process and high efficiency and energy conservation.