20 results about "Tuned liquid damper" patented technology

An offshore wind turbine jacket foundation capable with adjustable natural frequency and motion damping and a control method, comprising: a jacket; a tuned liquid damper system, comprising a central liquid tank communicated with seawater and distributed liquid tanks, wherein the central liquid tank and the distributed liquid tanks carry out liquid delivery through pipelines; a flow monitoring and control system configured to obtain storage information of each liquid tank by data acquisition; an acceleration data acquisition and analysis system configured to acquire acceleration data at key nodes of the jacket foundation; the pump on each pipeline is controlled based on the obtained data to realize the redistribution adjustment of the liquid storage and liquid level of each liquid tank in the damper system in a short time, and the mass distribution of the jacket structure as a whole is adjusted, so as to adjust the natural frequency and motion damping.

This invention discloses a semi-active vibration suppression device and its control method for hybrid-tower wind turbines, belonging to the field of wind turbine vibration control technology. The device includes a main frame, pulley system, water tank, spring, magnetorheological damper, and intelligent controller. The pulley system enables bidirectional sliding between the frames, allowing the water tank to move freely in the horizontal plane. The water tank contains antifreeze and vibration-damping fluid, forming a tuned liquid damper. The spring and magnetorheological damper are connected parallel to each other to the frame. The control method employs a strategy combining an offline sample database and online PID fine-tuning: offline, a genetic algorithm is used to optimize PID parameters under different operating conditions to build a database; online, the current operating condition is identified to match initial parameters, and a fine-tuning genetic algorithm is used to optimize the PID parameters in real time, adjusting the damping force of the magnetorheological damper. This invention integrates the semi-active adjustment capability of the magnetorheological damper with the passive vibration absorption advantage of the tuned liquid damper, achieving multi-frequency vibration suppression. It features a compact structure, fast response, and strong adaptability, effectively extending the unit's lifespan and reducing operation and maintenance costs.

This invention discloses a rotatable, actively tuned liquid damper, comprising a damper housing with a first open side and a second closed side arranged opposite each other along its height. The damper housing is filled with a tuning liquid. A base is mounted on the closed side of the damper housing. A liquid level sensor is fixed to the inner wall of the damper housing. A main structure connecting plate is used for connection to the main structure. A servo motor is mounted on the main structure connecting plate, and the output shaft of the servo motor is connected to the base to drive the damper housing to rotate with the base. A cover is mounted on the open side of the damper housing for opening / closing the damper housing. This invention can adjust the liquid level of the tuned liquid damper to avoid frequency jumps to a certain extent, thereby achieving a good vibration reduction effect.

The application provides a three-way self-adaptive control tuned liquid damper, which comprises a liquid mass damper, a damping system, a stepping system, a connecting system and a control unit; the liquid mass damper is composed of a top water tank, a mass block and a bottom water tank; the damping system is composed of silicone oil, an iron bar and an elliptical plugboard; the stepping system is composed of a stepping motor, a stepping push-pull rod, a telescopic rod frame, a stepping telescopic rod and an electric rotary table; the connecting system is composed of a water pipe, a water pump, an electromagnetic valve and a shape memory alloy spring; the control unit can control the electric rotary table to change the angle of the elliptical plugboard, the stepping system and the connecting system to adjust the frequency, stiffness and damping of the damper in real time according to the signals of the accelerometer and the displacement meter on the structure; and the application can realize the vibration control in the Z direction, the X direction and the Y direction in the plane, and has stronger vibration control performance and structural use comfort.

The utility model relates to a broadband vibration control double-control tuned liquid damper device with a failure protection mechanism, which comprises a double-curvature variable friction pendulum supporting unit, a vibration / vibration control unit, a vibration / vibration control unit, a vibration / vibration control unit and a vibration / vibration control unit, wherein the double-curvature variable friction pendulum supporting unit is arranged above a structure needing vibration / vibration control; the supporting steel platform is arranged above the double-curvature variable friction pendulum supporting unit; the tuned liquid damper body is arranged above the supporting steel platform, and the tuned liquid damper body is used for controlling the wind vibration response of the structure; the collision buffers are arranged at the two ends of the side face of the supporting steel platform, and the collision buffers are used for buffering and limiting under the extremely rare earthquake large-displacement working condition. Compared with the prior art, the broadband vibration control double-control tuned liquid damper device can be used for wind vibration control and has a good earthquake reduction effect, and the situation that when a rare earthquake or even an extremely rare earthquake occurs, the displacement of the damper is too large, and consequently a system fails can be avoided.

The embodiment of the application provides a damper, a wind turbine generator set support structure and a wind turbine generator set, the damper comprising an outer cylinder, an inner cylinder arranged in the inner part of the outer cylinder and a limiting piece; a first cavity is formed between the inner wall of the outer cylinder, the outer wall of the inner cylinder and the limiting piece, and an annular tuned liquid column damper is formed by adding damping liquid in the first cavity; a top plate is arranged in the inner part of the inner cylinder and is sealingly connected with the inner wall of the inner cylinder, a second cavity is formed between the inner wall of the inner cylinder and the top plate, and a tuned liquid damper is formed by adding damping liquid in the second cavity; a communication valve is arranged between the first cavity and the second cavity; the limiting piece is a piston structure, the outer cylinder, the inner cylinder and the limiting piece form a viscous damper, the inner cylinder provides a tuned mass for the viscous damper, a multiple tuned liquid column damping vibration reduction and load reduction device, namely a multiple universal tuned liquid column damper, is realized, the tuning frequency band of the damper is increased and can be dynamically adjusted, and the vibration reduction and load reduction effect of the damper is improved.

The invention provides a shake restraining device and a liquid storage tank. The shake restraining device comprises a baffle assembly used for being installed at a tank opening of the storage tank; the floating roof assembly floats on the liquid level in the storage tank, the floating roof assembly is filled with shake-inhibiting liquid, and a tuned liquid damper is formed through free liquid level shake of the shake-inhibiting liquid; the buffering assembly is arranged between the baffle assembly and the floating roof assembly. According to the oscillation suppression device and the liquid storage tank, oscillation energy of the liquid in the tank can be effectively consumed through the tuned liquid damper formed by the oscillation suppression liquid in the floating roof assembly, oscillation can be suppressed under the conventional working condition, great oscillation of the liquid can be greatly weakened under the resonance working condition, the impact pressure of the liquid on the tank wall is remarkably reduced, and the service life of the liquid storage tank is prolonged. The structural safety of the storage tank is guaranteed; the floating roof assembly floats on the liquid level, flow field distribution in the storage tank cannot be changed, interference on normal liquid inlet and outlet operation of the storage tank is avoided, the floating roof assembly is particularly suitable for storage scenes of high-viscosity liquid, it is ensured that the liquid conveying efficiency is not affected, and the production and operation cost is reduced.

The invention discloses a multi-tuned liquid damper for cross-wind multi-modal vibration control of a floating fan tower drum, which comprises a floating fan tower drum, and a plurality of liquid dampers are fixedly connected along the vertical direction of the floating fan tower drum; each liquid damper comprises a connecting piece, an external cavity fixedly connected with the connecting piece and internal liquid arranged in the external cavity; through liquid damper distribution multipoint cooperative tuning, each damper performs effective energy consumption on main modal response of the position where the damper is located, the amplitude of a multi-order vibration mode is remarkably restrained, and the vibration reduction effect of the whole structure is improved. According to the invention, accurate tuning and efficient energy consumption of a plurality of key vibration modes are realized, the modal amplitude of each order is effectively reduced, and the resonance phenomenon is inhibited, so that the anti-vibration performance and safety of the whole tower drum are improved, the service life of a fan system is prolonged, and the maintenance and repair cost is reduced.

The invention relates to the technical field of vibration reduction and isolation of maritime work equipment, and discloses a multidirectional constraint vibration reduction and isolation device for maritime work equipment, which comprises a mounting connecting plate, a supporting block and a base, the base is integrally formed at the bottom of the supporting block, the mounting connecting plate is fixedly mounted at the top of the supporting block, and an annular cavity is formed in the supporting block; according to the invention, the six fan-shaped sub-chambers are arranged, each fan-shaped sub-chamber is filled with liquid, and the liquid can shake in multiple directions within the range of the whole chamber, so that the multi-direction vibration damping device is adapted to irregular vibration such as rolling and pitching of marine engineering equipment, and the vibration damping effect is improved. And meanwhile, a one-way vibration reduction mode can be switched by means of an adjusting mechanism, the vibration reduction efficiency in the specific direction is improved in a targeted mode, based on the resonance principle of the tuned liquid damper, the liquid shaking frequency is matched with the inherent frequency of the platform, and the reverse inertia force directly counteracts vibration energy.

The invention discloses a composite damping shock absorption system for a floating type fan, which comprises a floating body platform which comprises an offshore floating foundation formed by a plurality of buoys and a connecting beam; the multi-mechanism cooperative damping system comprises a damping action frequency band complementary system constructed on the basis of the tuned mass resonance vibration absorption and liquid viscous flow energy consumption principle. Each buoy is provided with a tuned mass damper and a tuned liquid damper; the inherent frequency of the tuned mass damper is adjustable, so that the tuned mass damper is consistent with the frequency of a target control mode of the floating body platform; the tuned liquid damper performs broad-spectrum absorption on low-frequency broadband vibration of the floating body platform through flow shearing, eddy current and throttling loss of liquid. The composite damping shock absorption system has the advantages of being simple in structure, flexible in arrangement, efficient in control and the like, has extremely high practical application value, can provide key technical support for floating type wind power industrial engineering and has good technical economy and industrial adaptability.

The invention discloses a spring composite tuned liquid damper, a using method and a wind power blade. The spring composite tuned liquid damper comprises a damping tube, a spring, a throttling plate, a mandrel and a floating body. The damping tubes are symmetrically arranged and are connected together through the mandrel to form an annular tubular closed structure; a spring and a floating body are installed in an inner cavity of the end of each damping pipe, each damping pipe is filled with damping liquid, the damping liquid makes contact with the end face of the corresponding floating body, the two sides of the mandrel are connected with the floating bodies in series through the springs, the throttling plates are arranged in the inner cavities of the damping pipes, and the damping vibration attenuation effect is jointly achieved when the wind power blade moves. The liquid damper is used for vibration reduction of blades of a wind generating set, and the problems that an existing liquid damper is poor in damping vibration reduction effect and even cannot effectively reduce vibration under the large amplitude are solved; and meanwhile, the problem that coordination between low damping and high durability is difficult to achieve is solved, the low-frequency damping performance and the shock resistance are enhanced, and the wide-frequency-domain damping vibration attenuation performance is improved.

The utility model relates to the technical field of dampers, in particular to a tuned liquid damper of a wind driven generator, which comprises a plurality of support frames arranged in the circumferential direction of the inner side wall of a tower drum of the wind driven generator, and at least two limiting rods are arranged on the support frames at intervals; the axial direction of the limiting rods is parallel to the axial direction of the tower drum of the wind driven generator, the tuned liquid damper of the wind driven generator is clamped between the limiting rods on the two adjacent supporting frames, and the tuned liquid damper is designed to be a flat cylinder, so that the tuned liquid damper can adapt to installation in a limited space in the tower drum of the wind driven generator; and a latticed grid is arranged in the water tank, and a plurality of dampers are arranged in the tower drum in the circumferential direction, so that the damping effect is improved.

The utility model discloses a vibration excitation device for a tuned liquid damper reduced scale model test, which comprises a test platform, a limiting device for limiting a test water tank is arranged on the test platform, and the test water tank is used for loading test liquid; rollers are arranged below the test platform and enable the test platform to reciprocate along a set direction; the driving device is used for driving the test platform to reciprocate according to a set frequency; the device further comprises a data acquisition device, the data acquisition device comprises a data acquisition unit, an acceleration sensor and a wave height displacement meter, the acceleration sensor and the wave height displacement meter are connected with the data acquisition unit, the acceleration sensor is installed on the test platform and used for acquiring acceleration data of the test platform, and the wave height displacement meter is installed in the test water tank and used for acquiring wave height data of the test liquid. The vibration excitation device for the tuned liquid damper reduced scale model test is used for simulating the vibration of a building structure so as to research the movement of liquid in the tuned liquid damper.

The invention discloses an aquaculture net cage based on a wind power plant, which belongs to the technical field of fusion of marine renewable energy sources and marine ranching and comprises a wind generating set, a floating platform and an aquaculture net cage unit. The interior of the floating type platform is divided into at least two independent cabins through partition plates, water in a specific proportion is injected into the cabins to form a multi-order tuning liquid damper, and multi-order vibration of the platform in the marine environment is effectively restrained. The aquaculture net cage unit is connected to the lower portion of the floating type platform, a net of the aquaculture net cage unit is of a spiral surrounding curved surface structure and is supported by a framework with the adjustable lead angle, and axial vortex is formed under the effect of natural water flow to achieve self-cleaning. The system is further provided with an intelligent bait casting unit, and bait casting strategies can be dynamically adjusted according to real-time ocean current data. By means of the integrated design, efficient fusion of offshore wind power and deep sea breeding is achieved, and the device has the advantages of being stable in structure, self-cleaning, high in bait utilization rate, self-sufficient in energy and the like.

The application relates to an adjustable composite tuning liquid damper for structural vertical vibration control, comprising a base fixedly connected to a main structure; a slide rail vertically arranged on the base; a support frame slidably connected with the slide rail and capable of sliding up and down along the slide rail; a liquid vibration unit arranged in the support frame and fixedly connected with the support frame; and a vibration control unit located between the support frame and the base, with two ends of the vibration control unit being connected with the bottom of the support frame and the upper surface of the base respectively, wherein the vibration control unit comprises a spring element and a damper element arranged in parallel. Compared with the prior art, the application considers both low-frequency tuning capability and effective damping mass, realizes adjustable parameters, and enables effective mass to fully participate, so as to meet the engineering requirements of large-scale structural vertical tuning vibration control.

The invention discloses a boarding bridge, and relates to the technical field of boarding bridges. A damper base is fixedly connected to the upper portion of the frame, a plurality of hydraulic buffer rods and a middle supporting frame are rotationally connected to the upper portion of the damper base through universal joints, a top support is fixedly connected to the tops of the hydraulic buffer rods, a plurality of U-shaped water tanks are fixedly connected to the two sides of the middle supporting frame, and water is stored in the U-shaped water tanks. A water inlet is fixedly connected to the upper portion of the U-shaped water tank, a water outlet is fixedly connected to the lower portion of the U-shaped water tank, cooling water jackets are fixedly connected to the upper portions of the multiple hydraulic buffer rods, and water distribution pipes are fixedly connected to the two sides of the multiple cooling water jackets. A resonance damping system is formed through cooperation of the U-shaped water tank and the hydraulic buffer rod, a tuned liquid damper is formed when water in the U-shaped water tank shakes, and the vibration reduction effect is enhanced; meanwhile, circulating cooling water of the water supply assembly cools the hydraulic buffer rod through the cooling water jacket, and the buffer performance of the hydraulic buffer rod is kept stable. By means of the design, the dual functions of vibration reduction and cooling are achieved.

The application discloses a kind of shock absorption system and method, the shock absorption system includes pumping injection device and the pebble stratum of certain volume, pumping injection device is used to inject or pump liquid in pebble stratum, and pebble stratum is used as the foundation of building structure.The shock absorption system can change the mass of pebble stratum by pumping liquid to closed pebble stratum, realize the adjustment of pebble stratum inertia force size and the adjustment of self-vibration frequency, play the resonance effect and liquid sloshing friction energy dissipation through the movement of pebble stratum, reduce the vibration response of building structure, greatly improve the shock absorption energy dissipation efficiency of system, effectively reduce earthquake disaster, also can avoid sand liquefaction phenomenon under the earthquake action of natural pebble stratum;It can directly utilize the characteristics of natural pebble stratum, realize the device of tuning liquid damper shock absorption effect, and be applicable to different foundation conditions, construction is convenient, with good energy dissipation effect, the shock absorption system has pioneering engineering significance and practical value.

The invention provides a frequency conversion type tuned liquid damper and a frequency modulation control method thereof. The damper comprises a closed container, damping liquid and a frequency adjusting assembly. The frequency adjusting assembly comprises a control unit and an angle adjusting part. The control unit obtains the target inclination angle of the closed container according to the vibration main frequency of the controlled structure, the effective side length of the liquid level of the closed container in the horizontal state in the external load direction and the effective water depth of damping liquid in the closed container. The angle adjusting piece controls the inclination angle of the closed container. The method comprises the steps of detecting the vibration main frequency of a controlled structure; the target inclination angle of the closed container is calculated according to the vibration main frequency of the controlled structure, the effective side length of the liquid level of the closed container in the horizontal state in the external load direction and the effective water depth of the damping liquid in the closed container; and driving the closed container to rotate to the target inclination angle through the angle adjusting piece. The damper has the advantages of being adjustable in tuning frequency, convenient to adjust and the like.