383results about How to "Reduce fatigue damage" patented technology

The invention relates to methods for installing a wind turbine. A method may comprise the steps of establishing a substructure, said substructure comprising at least one pipe (1) extending upwards and said at least one pipe (1) being part of a primary structure of the substructure, establishing a support of a secondary structure (5) on the at least one pile (1), mounting of fittings to the secondary structure (5), said mounting of the fittings to the secondary structure (5) preferably being established by welding or bolting, and not mounting fittings to at least one of the at least one pile (1) being part of the primary structure. A method may alternatively comprise the steps of mounting a wind turbine tower to the at least one pile (1) being part of the primary structure, and the secondary structure (5) constituting an intermediate structure (5, 11) between the at least one pile (1) and the wind turbine tower (7). Even in the alternative, a method may comprise the steps of mounting of the secondary structure (5) to at least one intermediate tubular section (11) being part of the primary structure and mounting the wind turbine tower (7) to the at least one intermediate tubular section (11).

The invention discloses a stabilizing device, a floating foundation and an offshore wind power generator. The stabilizing device comprises a U-shaped water chamber, wherein the U-shaped water chamber comprises a first hollow upright column, a second hollow upright column and a bottom buoyancy tank connected between the bottoms of the two upright columns, the first upright column and the second upright columns are communicated with the bottom buoyancy tank, and the top of the first upright column and the top of the second upright column are communicated through an air communication pipeline. The floating foundation is at least provided with a first upright column, a second upright column and a third upright column, and comprises at least one stabilizing device. The offshore wind power generator comprises the floating foundation, a mooring rope, a tower, vanes and a wind power generator set, wherein the mooring rope is connected with the outer edge of the floating foundation and is anchored to the seabed, the bottom end of the tower is arranged on the floating foundation, and the vanes and the wind power generator set are arranged on the top of the tower. By means of the stabilizing device, stabilizing of a floating fan can be simply and effectively achieved through a double-resonance principle.

The invention provides a tunnel structure for a weak and broken high-temperature water-bearing stratum. The tunnel structure comprises a tunnel lining and an inverted arch which form a closed annular structure, the footing of the tunnel lining is connected with the left end and the right end of the inverted arch, drain holes are formed in the footing, and drainage ditches and cable troughs are formed in the connecting portions of the lining and the inverted arch; a traffic lane in a tunnel is arranged on a vibration reduction layer, a bearing platform plate is arranged on the lower portion of the vibration reduction layer and supported by longitudinal beams and cross beams jointly, the longitudinal beams and the cross beams are supported by pile foundations which vertically penetrate through the inverted arch and are inserted into the stratum, the ends of the two sides of the traffic lane, the ends of the two sides of the vibration reduction layer and the ends of the two sides of the bearing platform plate are all disengaged from the positions where the drainage ditches and the cable troughs are located, and the longitudinal beams, the cross beams and the pile foundations are disengaged from the inverted arch. The tunnel structure has the effects of water resistance, thermal insulation and vibration reduction and is compact in structure, high in bearing performance, convenient to construct, lower in construction and maintenance cost and wide in application range.

The present disclosure is directed to a method of manufacturing a modular rotor blade for a wind turbine. The method includes providing a plurality of resin systems for manufacturing a plurality of blade components for the modular rotor blade. Each of the resin systems includes at least one of a thermoset material or a thermoplastic material, optionally a fiber reinforcement material, and at least one additive. Thus, the method includes determining a resin system for each of the blade components based on a location and / or function of each blade component in the rotor blade. In addition, the method includes forming each of the blade components of the rotor blade from one of the plurality of resin systems and securing each of the blade components together to form the modular rotor blade.

An actuation system including a plurality of actuators; a plurality of position sensors coupled to the actuators, the plurality of position sensors providing rate feedback signals proportional to an actuator rate; a plurality of force sensors coupled to the actuators, the plurality of force sensors providing delta pressure signals; and a feedback control loop configured to receive the rate feedback signals and delta pressure signals and compute a difference in actual actuator rates and sum the difference with a computed difference in actuator forces to generate actuator positioning commands that equalize the actuator forces on a control surface.

The invention discloses a floating fan base with flare type tension legs, a marine wind-driven generator and a construction method. The floating fan base comprises a top supporting platform, a bottom supporting structure, at least three hollow stand columns and a ballast regulating system, wherein the top supporting platform is used for supporting a pylon, blades and a wind-driven generator set; the bottom supporting structure is connected with multiple tension legs; the top supporting platform is connected with the bottom supporting structure via the hollow stand columns, the hollow stand columns are arranged around the vertical center line of the floating fan base, and each stand column inclines outwards from a lower end to an upper end relative to the vertical center line of the floating fan base; the ballast regulating system is arranged in the stand columns and / or the bottom supporting structure. The marine wind-driven generator of the base with the structure has excellent movement performance, integral wet towing can be performed, and the floating fan base and the marine wind-driven generator are convenient to manufacture, assemble and mount.

The invention discloses a variable pitch control method of a wind generating set. The method includes the steps: acquiring real-time rotating speed of a wind wheel and real-time pitch angles of bladesof the wind generating set; calculating variable pitch speed of the blades by a proportional differential control algorithm according to the real-time rotating speed and the real-time pitch angles; controlling variable pitch rotation of the blades according to the variable pitch speed. Compared with a traditional proportional integral control algorithm, the pitch angles cannot be converted into the variable pitch speed, the variable pitch speed is directly acquired, so that delay and indeterminacy increased by a converting link are avoided, tracking of a system is accelerated, the dynamic response capability of a variable pitch system of the wind generating set is improved, the method solves the problem of excessive speed of the wind generating set under gale and strong turbulence, so that generation of an extreme load is avoided, fatigue damage to the wind generating set is reduced, and availability and the generating capacity of the wind generating set are improved.

A process for preparing trimellitic anhydride from metatritoluene, acetic acid as solvent, and catalyst (cobalt acetate, manganess acetate, tetrebromoethane, or hydrogen bromide) by continuous oxidization method includes continuous oxidizing reaction, anhydridization, refining, slicing or granulating and recovering solvent. Its advantages are high yield (up to 120%), high safety, high quality of product, and long service life of equipment.

The invention relates to a waterpower oscillator through which effective pressure can be exerted on a drill bit and well drilling efficiency can be improved in the technical field of oil exploitation. The waterpower oscillator comprises an upper connector, a stator, an outer shell and a lower connector all of which are sequentially connected in a sealed mode. A rotor is eccentrically arranged inside the stator, and the lower end of the rotor is sequentially connected with a cardan shaft upper connector, a cardan shaft and a cardan shaft transmission rod. The lower end of the cardan shaft transmission rod is connected with the outer shell in a sealed mode, the lower end of the outer shell is in threaded connection with the lower connector in a sealed mode, the lower end of the cardan shaft transmission rod is provided with a vibration valve in a matched and sleeved mode, and the vibration valve can do reciprocating sliding motion along the matched surface relative to the cardan shaft transmission rod. The lower end of the vibration valve is provided with a movable valve plate in a sealed and sleeved mode, wherein the movable valve plate and the vibration valve can do the synchronous movement, the upper end of the lower connector is correspondingly provided with a fixed valve plate attached to the movable valve plate, the movable valve plate and the fixed valve plate are respectively provided with a sector channel with the area larger than that of a half circle. An annular hollow part through which liquid can flow is formed among the rotor, the cardan shaft upper connector, the cardan shaft, the stator and the outer shell, the cardan shaft transmission rod is provided with a channel communicated with the annular hollow part, and the channel is communicated with a vibration valve cavity and the sector channels.

The invention provides a creep-resisting and aging-resisting rubber tie plate under rail and a preparation method thereof. The rubber tie plate is characterized in that content proportions of rubber components by weight are as follows: 85-95 parts of natural rubber; 5-15 parts of cis-butadiene rubber; 30-50 parts of carbon black; 25-40 parts of white carbon black; 5-15 parts of organic modified montmorillonite; 1.5-2.5 parts of sulfur; 0.5-1.0 part of a promoter; 0.8-1.5 parts of promoter DM; 5-8 parts of zinc oxide; 1-2 parts of stearic acid; 1-2 parts of anti-aging agent RD; 1-2 parts of anti-aging agent AW; 1-2 parts of anti-aging agent D; 0.5-1 part of scorch retarder CTP; and 2-4 parts of a surface modifier. The rubber tie plate can resist creep and aging, prolongs service life, and has simple process and reasonable raw material proportioning.

The invention discloses a bending plate type tire device. The bending plate type tire device comprises a wheel rim, wherein a plurality sets of supporting pieces which are continuously bended are fixed on the circumference annular surface of the wheel rim through fastening pieces; a band lining is arranged on the outer parts of the supporting pieces in a padding manner, and is wrapped with a packing piece, or an inflatable cover tire is arranged on the outer part of each of the supporting pieces; the longitudinal section of each supporting piece is in a flat S shape, and each supporting piece is divided into a mounting section, a neck bend, a straight section, a shoulder bend, a working section and a tail section, wherein a tail inserting groove is formed in the surface of the tail end of the working section, and is circular; a jointed part of the tail inserting groove and the tail section of each supporting piece forms a triangular space; a plurality of bosses radially facing outwards are arranged at the position, close to the tail section, of the tail inserting groove. According to the bending plate type tire disclosed by the invention, compared with the prior art, one or more sets of plate-shaped elastic supporting pieces which are mutually connected and continuously bended are mounted on the wheel rim, so that the functions of elastically supporting a wheel load, driving and braking are realized, and the requirement that a vehicle can durably and safely operate in multiple complex and harsh environment is met.

The invention discloses a load modelling method and a load control method for a wind turbine generator system. The load modelling method and the load control method for the wind turbine generator system comprise the following steps: firstly, acquiring axial inducing factors and circumferential inducing factors corresponding to each group of tip speed ratios and pitch angles through iterating; secondly, calculating flapping coefficients and wind energy coefficients; thirdly, performing nonlinear fitting through the flapping coefficients and the wind energy coefficients corresponding to a plurality of groups of tip speed ratios and pitch angles to obtain a calculating formula of the flapping coefficients and the wind energy coefficients with respect to the tip speed ratios and the pitch angles, and obtaining a load model; fourthly, on the basis of the load model, calculating an optimal pitch angle corresponding to the least flapping load at each wind speed when the output is constant, and performing nonlinear fitting to obtain a formula of the optimal pitch angle with respect to the wind speed; fifthly, obtaining the optimal pitch angles according to the wind speeds when the wind turbine generator system operates through calculating, and obtaining pitch angle adjustment values; and finally, superposing the pitch angle adjustment values obtained on the basis of a PID (Proportion Integration Differentiation) variable pitch control method, and performing pitch angle control. According to the load modelling method and the load control method for the wind turbine generator system, shimmy load and flipping load are comprehensively taken into consideration, and a more accurate load model and a more accurate load control method are realized.

A rotating electrical machine includes a rotor core, a rotor shaft, a coil, a bind, a lead-out wire of which one end is connected to the coil and the other end is connected to a neutral ring. A filling is filled between the coil and the neutral ring. The neutral ring is formed with a plurality of members that are connected with one another to have flexibility.

The invention discloses a robot integrated joint unit and a foot type robot applying the same, and belongs to the technical field of robot joints. An existing double-joint line arrangement mode influences structure safety and attractiveness of a robot, a wire is easily damaged, and the service life of the wire is influenced. The robot comprises a first motor, a speed reducer assembly, a second motor assembly, a second speed reducer assembly and a first output connecting rod. Double motors of double joints are located on the same side of the joints, and the situation that a motor power cable needs to pass through the joints is avoided so that the fatigue damage of the motor power cable can be effectively relieved, and the service life of the motor cable wire can be prolonged. The motor assembly and a joint connecting rod do not need to reserve a special threading hole and a cable arrangement mechanism, so that the structure is more reliable; the integration degree of the double-joint unit is further improved, the axial size of the joint unit is reduced, and the structure is more attractive.

This invention relates to a connector, particularly to a shackle suitable for use in connecting two links of a chain or a chain to an anchor, more particularly to a connector comprising a first portion and a second portion, at least one first connector arm on the first portion and at least one second connector arm on the second portion, wherein both the first and second connector arms have multiple bearing surfaces, preferably six, and are able to engage one another when the connector is coupled by means of the bearing surfaces. The connector of the present invention has the advantage of having a break load of 1.3[0.0274 d2(44−0.08 d) kN, wherein d is the nominal diameter, and preferably a thickness of 1.3 d.

The invention provides a deflecting fence type square heat exchanger with a waved tube. The heat exchanger comprises a case, a heat exchange tube, an upper tube plate and a lower tube plate, wherein the case, the upper tube plate and the lower tube plate form airtight space, an airtight upper head is arranged on the left side of the upper tube plate, an airtight lower head is arranged on the right side of the lower tube plate, a tube-side inlet is arranged on the upper head, a tube-side outlet is arranged on the lower head, the heat exchange tube is installed in the airtight space, two ends of the heat exchange tube are installed in the upper tube plate and the lower tube plate respectively and communicated with the upper head and the lower head respectively, a tube-side outlet tube is arranged on the right of the upper tube plate on the case, a tube-side inlet tube is arranged on the left of the lower tube plate, and a deflecting fence for supporting the heat exchange tube is mounted in the case and comprises a deflecting ring and a support rod installed in the deflecting ring. According to the heat exchanger, vortex flow and the Venturi effect can occur when shell pass fluid flows through the square deflecting fence, so that the shell pass fluid can obtain good turbulent current conditions, dead flow zones and leakage current losses when the fluid flows across tube bundles are reduced, and heat exchange on the shell side is strengthened.

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 discloses a structural stability enhancing floating wind turbine foundation. The structural stability enhancing floating wind turbine foundation comprises a floating plate, a middle column, steel supports, tree shock absorbing buoys and a damping pendulum, wherein the central column is arranged in the center of a triangular structure formed by the three shock absorbing buoys, the above of the central column is provided with the floating plate, and the top of the floating plate is provided with a wind turbine; every shock absorbing buoy is composed of, sequentially from top to bottom, an equipment cabin, a ballast tank and a heaving plate, the equipment cabin serves as the mechanical storage chambers of power generation of the wind turbine, the ballast tank enables the buoyantcenter of the overall structure to be higher than the center of gravity through ballast, and the heaving plate is used for greatly reducing structural heaving response; steel supports are connected between every two shock absorbing buoys as well as between every shock absorbing buoy and the central column; the lower ends of the three shock absorbing buoys are all connected to the damping pendulum. The structural stability enhancing floating wind turbine foundation is connected to the seafloor through a tension type mooring system, and the tension type mooring system is composed of a lower anchoring end and an upper mooring cable. The structural stability enhancing floating wind turbine foundation can resist complex marine cyclic dynamic load to maintain long-term stability of an upper wind turbine tower.

The invention discloses a vertical spiral vibrating screen capable of greatly increasing the area of a screen and lengthening the movement stroke of powder. The vertical spiral vibrating screen comprises a base, a screen arranged on the base through a plurality of supporting springs, a vibrating device connected with the lower end of the screen and positioned in the base, a bin arranged at the upper end of the screen and a feeding valve arranged in the bin. The screen comprises a shell, a middle upright post and a screen net. The shell is a cylinder provided with a cover plate and a bottom plate, and the lower part of the shell is provided with a fine powder feeding hole and a coarse powder feeding hole; the middle upright post is vertical to the center of the shell; and the screen net comprises a bottom screen net, a lateral screen net and a top plate, wherein the inner edge of the bottom screen net is fixed on the middle upright post and is downwards spiral around the middle upright post, the lateral screen net is arranged coaxial with the middle upright post and is downwards spiral around the middle upright post, the lower end of the lateral screen net is connected with the outer edge of the bottom screen net, and the inner edge of the top plate is fixed on the middle upright post and is downwards spiral around the middle upright post.

The invention discloses an expressway guardrail cleaning device which comprises a connecting support, a reversing arm, a steering arm, a connecting bar component, a spring, a sweeper and a sweeper support assembly, a swing cylinder, a swing cylinder seat, a lifting cylinder, and a four bar mechanism formed by the connecting bar component, the steering arm and the sweeper support assembly. The middle of the swing cylinder seat is groove-shaped and provided with a connecting block inside. The connecting block is fixed with one end of a guide shaft. The other end of the guide shaft penetrates through a guide hole in the groove-shaped bottom of the swing cylinder seat. The other end of the guide shaft is provided with a limit adjusting nut. The spring, a compression spring, is arranged on the guide shaft and arranged between the connecting block and the groove-shaped bottom of the swing cylinder seat. The swing cylinder seat is arranged on the reversing arm. A piston of the swing cylinder is hinged with the reversing arm. The expressway guardrail cleaning device is convenient to operate and capable of adjusting vertical position of the sweeper and prolonging service life of the spring.

The invention relates to a wind-driven generator, in particular to a yaw mechanism used on the wind-driven generator. The technical proposal provided by the invention is that annular pivoting supports which are mutually connected into a whole are arranged above an annular brake disc, the periphery of the pivoting supports is provided with teeth, and the invention is characterized in that: a reducer is arranged outside the pivoting supports, electric motors which are interconnected are arranged above the reducer, a yaw transmission gear of the reducer is meshed with the teeth on the pivoting supports, the axis of the yaw transmission gear is parallel to the center line of the pivoting supports; a plurality of bolts are arranged at the inner edge of the pivoting supports along the circumference direction of the pivoting supports, the axis of the bolts is also parallel to the center line of the pivoting supports; a train limit switch and a position transducer are further arranged outside the pivoting supports, a gear interconnected with the train limit switch is meshed with the teeth on the pivoting supports. The wind-driven generator of the invention can reduce the fatigue damage to a yaw gear box caused by frequent forward and reversing start.

The invention discloses local reinforcing equipment for a wind power generator unit foundation ring. The local reinforcing equipment comprises an original reinforced concrete foundation and a local reinforcing device. The local reinforcing device comprises a newly-poured reinforced concrete foundation, inner side steel clamping plate units and outer side steel clamping plate units. The multiple inner side steel clamping plate units are arranged on the inner wall of the upper portion of a foundation ring of the original reinforced concrete foundation in an annular mode, and the multiple outer side steel clamping plate units are arranged on the outer wall of the upper portion of the foundation ring in an annular mode; and the newly-poured reinforced concrete foundation is poured on the original reinforced concrete foundation. According to the local reinforcing equipment for the wind power generator unit foundation ring, loads which are borne by the foundation ring and generated by a draught fan in a running state are dispersedly transmitted through the inner side steel clamping plate units, the outer side steel clamping plate units, connecting steel bars, inner foundation negative bend steel bars and outer foundation negative bend steel bars, stress in the reinforced foundation ring is effectively reduced, fatigue damage to a draught fan foundation is reduced, and the service life period of the reinforced draught fan foundation is greatly prolonged. The invention further discloses a local reinforcing method for the wind power generator unit foundation ring.

A heat treatment method for improving fatigue resistance of Al-Cu-Mg alloy comprises: performing high-temperature short-time (505-535 DEG C / 1-25 min) solution hardening treatment on cold-rolled sheets, then performing natural aging at room temperature for 96 h or more. The aluminium alloy capable of being treated by the heat treatment method comprise the components: Cu, Mg, Ti and Al. The technology is simple and reasonable; and through high-temperature short-time solution hardening treatment, the alloy obtains relatively high goss texture components. Because most of crystal faces {111} of crystal grains in the alloy with high goss texture is positioned or close to the direction of the maximum external shearing stress, the reciprocating sliding of dislocation is promoted and a persistent slip band is easy to generate in the alloy, and thus the plasticity induction closure effect of fatigue crack is enhanced and the damage accumulation is reduced, also the crack deflection is promoted, and thus the fatigue crack spreading rate of the alloy is reduced and the fatigue resistance of the alloy is improved.

The invention belongs to the technical field of rubber, and discloses an organic clay rubber composite material for a laminated rubber supporting seat and a preparation process thereof. The organic clay rubber composite material is mainly characterized by adding organic clay, carbon black, a vulcanizing agent, an activating agent, an accelerating agent and an anti-aging agent to rubber.The organic clay rubber composite material for the laminated rubber supporting seat, which is provided by the invention, is prepared by adopting a mechanical blending intercalation method and substitutes reinforced carbon black or wholly substitutes low-cost reinforced materials, such as calcium powder and the like, by adopting an organic clay part; the laminated rubber supporting seat manufactured by using the organic clay rubber composite material can not only fundamentally solves the problems of potential quality safety hazards, namely incapable aging resistance, poor fatigue-resistant property, and the like, but also lowers the production cost, enhances the heat-resistant property, compression-resistant property and fatigue-resistant property of a rubber base body and keeps the higher breaking and tensile strength and breaking elongation of the rubber material.

The invention relates to an ocean platform wave removal icebreaking structure. The ocean platform wave removal icebreaking structure is characterized by comprising an upper cone ring, a middle cone ring and a lower cone ring, wherein the upper cone ring, the middle cone ring and the lower cone ring are sleeved on a pile leg of an ocean platform in sequence from top to bottom, the upper cone ring and the lower cone ring are respectively fixed with the pile leg in a welding mode, the inside of the middle cone ring is fixed with the pile leg in the welding mode through a plurality of supporting beams which are arranged in a spaced mode, the top of the middle cone ring is fixedly connected with the bottom of the upper cone body through a plurality of upper inclined angle prismatic bodies which are arranged in a spaced mode along the circumferential direction, the bottom of the middle cone ring is fixedly connected with the top of the lower cone ring through a plurality of lower inclined angle prismatic bodies which are arranged at intervals along the circumferential direction, an edge angle of each upper inclined angle prismatic body and an edge angle of each lower inclined angle prismatic body are both outside arranged, and the upper inclined angle prismatic bodies and the lower inclined angle prismatic bodies are symmetrical to the middle cone ring. The ocean platform wave removal icebreaking structure is low in manufacture and installation difficulty, can be widely applied in the process of ocean platform icebreaking, is particularly applicable to ocean platform structures which are large in diameters of pile legs, and are greatly influenced by wave load.

The invention discloses a plane truss for parallel chords, which is featured in that the node position and length of diagonal web members are changeable and falls into the field of structural members. The detachable connection with chords through connectors and the telescopic mechanism of diagonal web members achieve the effect that the node position and length of the diagonal web members are changeable, thus improving the applicability of the truss in different working places.

The invention discloses a sea-crossing bridge pier anti-collision buffer device and belongs to the field of bridge safety protection. The device comprises a first anti-collision assembly. The first anti-collision assembly and a second anti-collision assembly are connected to a pier in a sleeving mode. The second anti-collision assembly is connected with the first anti-collision assembly through asteel rope; the first anti-collision assembly comprises a protective gasket connected to the outer side of the pier in a sleeving mode; a main ring sleeve is arranged on the outer side of the protective gasket; and a coaxial ring groove is formed in the inner wall surface of the main ring sleeve, two ring grooves are formed in the inner wall surface of the main ring sleeve, rotatable sliding steelrings are installed in the ring grooves and connected with the outer wall surface of the protective gasket through supporting pieces, the supporting pieces are arranged in a surrounding mode, and a first buoyancy air bag is arranged between the upper supporting piece and the lower supporting piece and surrounds the protective gasket. According to the device, a protection position can be adjustedalong with a water level, the piers in water can be protected at the same time, a ship movement direction can be changed during collision, graded collision is achieved, ship collision damage is reduced, and a radial impact force borne by skilled transition is decreased.