563 results about "Viscous damper" patented technology

The invention discloses a support system for a long-span cable-stayed bridge, which relates to the technical field of bridge engineering. The support system consists of nine parts including main girders, bridge towers, stay cables, transitional piers, transverse wind resisting bearings, longitudinal viscous dampers with limiting function, longitudinal sliding bearings with limited transverse rigidity, transverse dampers, and telescopic devices. Compared with the prior support system for the long-span cable-stayed bridge, the support system of the invention has the characteristics that the longitudinal viscous dampers with limiting function are arranged between the main girders and the bridge towers; and the longitudinal sliding bearings with limited transverse rigidity and the transverse dampers are arranged between the main girders and the transitional piers. The support system provides effective rigidity and damping for the long-span cable-stayed bridge to ensure that the static force and the dynamic force responses of the bridge are controlled in an acceptable scope; the structural stress is definite; and the applicability is strong.

The invention relates to a viscous damper with an axial spacing device, which comprises a left spherical hinge seat, a piston rod, a piston, a damping cylinder body, a balancing bar, a right spherical hinge seat, damping medium, a combined disk spring, a spacing cylinder body, a pressure ring A, and a pressure ring B. The spacing cylinder body is arranged between the damping cylinder body and the right spherical hinge seat, internal threads are arranged at two ends of the spacing cylinder body, the left end of the spacing cylinder body is connected with the damping cylinder body via the pressure ring A, the right end of the spacing cylinder body is connected with the right spherical hinge seat via the pressure ring B, the length of the balancing bar is extended into the spacing cylinder body, a threaded small circular cylinder is arranged at the right end of the balancing bar, and the combined disk spring is installed on the small circular cylinder. Compared with the prior art, the inventive viscous damper can meet the technical requirements on dynamic energy dissipation for shock resistance, and meet the technical requirements on static load and excessive displacement limit.

The invention relates to a novel tuned particle mass damper and belongs to the technical field of shock resistance and absorption of structural engineering. The novel tuned particle mass damper comprises a damper fixing plate, mass block sliding cavities, mass blocks, connecting springs, viscous damper units, connecting bars, a damper cavity, damper chamber separating plates, multi-stage damping particle groups. Four sliding cavities are arranged on the damper fixing plate; four mass blocks are arranged inside the four sliding cavities, perform low-damping movement inside the internal tracks of the sliding cavities and are connected with the damper fixing plate through the viscous damper units and the springs and connected with the damper cavity through the connecting bars. The chamber separating plates are arranged inside the damper cavity, a single layer of the multi-stage damping particle groups are uniformly arranged on every chamber separating plate. Under the action of wind and/or earthquakes, the damper cavity moves opposite to a basic structure on the plane and generates control force opposite to that of the basic structure, internal damping particles collide fiercely to rapidly dissipate system mechanical energy and further improve system damping effects.

The invention relates to a drum-type omni-directional turned mass damper, belonging to the technical field of vibration resistance and absorption in structural engineering, and comprising a top cover,an outer-wall sleeve connected with the top cover, a sleeve-type structure arranged inside the outer-wall sleeve, an internal horizontal baffle and an external horizontal baffle. The sleeve-type structure comprises an inner-ring core cylinder, an outer-ring core cylinder, a steel ball holder and a steel ball, wherein the inner-ring core cylinder is arranged in the outer-ring core cylinder, the outer surface of the inner-ring core cylinder is fixed with the steel ball holder that is internally equipped with the steel ball. A viscous damper is connected between the outer-ring core cylinder andthe outer-wall sleeve, the lower end faces of the inner-ring core cylinder and the outer-ring core cylinder are both connected with the internal horizontal baffle via a universal rolling spherical hinge, and a spring is connected between the internal horizontal baffle and the external horizontal baffle which is further fixedly connected with a substructure. The damper can be operable for turning energy consumption and vibration damping in all directions of the structure, namely, two horizontal directions, vertical direction, and two directions of reversing and swinging.

A seismic isolation bearing comprises a lower plate, an upper plate, and a cylindrical roller in rolling contact with an upwardly facing bearing surface of the lower plate and a downwardly facing surface of the upper plate. The lower plate is fixable to a base, while the upper plate is fixable to a superstructure, for example a bridge deck. One or both bearing surfaces are sloped to form a central trough at which the cylindrical roller resides under normal weight of the superstructure, and toward which the roller is biased when relative displacement between the lower and upper plates occurs to provide a constant restoring force. A pair of sidewall members are fixed to the lower plate to withstand strong forces directed laterally with respect to the isolation axis along which rolling displacement occurs, and a pair of sliding guides carried one at each end of the roller provide dry frictional damping as they engage an inner wall surface of a corresponding sidewall member. The isolation bearing preferably comprises a locking mechanism that prevents relative displacement under normal non-seismic horizontal loading, but allows the bearing to function as intended under seismic loading. Visco-elastic or viscous dampers, linear springs, and nonlinear springs such as hardening springs are preferably mounted between the lower and upper plates to reduce bearing displacement, dissipate energy, and otherwise adjust periodic motion characteristics of the bearing. Further embodiments providing isolation along orthogonal X and Y axes are also disclosed.

The invention discloses a driven viscous damper adjustable in damping force, and belongs to the technical field of civil engineering structural vibration damping. According to the driven viscous damper adjustable in damping force, the Bang-Bang active control algorithm principle is used, the character that a directional gear which can anticlockwise rotate and a directional gear which can clockwise rotate can only rotate in one direction is used, and therefore a mechanism which is composed of directional gears, free gears, a rack track, baffles and a viscous damper is designed. When interlayer displacement occurs in the structure, the process where displacement returns to the balance position is not influenced by inhibition action of the damping force of the viscous damper, and an oil damper is made to be more effective in structural vibration damping control.

An endless cord exercise machine in which a user applies a continuous pulling motion to a cord that is attached to a resistance mechanism is disclosed. The machine may be arranged to simulate the acts of rope climbing or of scaling a wall with the assistance of a rope, or may be arranged to provide other types of upper and lower body muscle development. The resistance mechanism is ideally comprised of a plurality of rotary viscous dampers of differing viscosities housed in a rotating drum. A spring-loaded adjustment key mechanism extending through the hub of the drum and dampers allows the user to selectively engage any combination of dampers to provide exercise resistance.

The invention relates to a self-adaption stiffness characteristic motion decoupling three-dimensional earthquake/vibration isolation support. The support mainly includes an upper connecting plate, anintermediate plate, a lower connecting plate, a disc spring, a compression spring, pre-pressing springs, a laminated lead core rubber bearing and viscous dampers. The upper connecting plate, the intermediate plate and the lower connecting plate are made of high-strength low-carbon steel and have high bearing capacity. The upper connecting plate and the intermediate plate are engaged with each other to play a motion guiding role. The disc spring, the compression spring, the pre-pressing springs, the laminated lead core rubber bearing and the viscous dampers together form a vertical earthquake/vibration isolation system. The laminated lead core rubber bearing, the pre-pressing springs and the viscous dampers form a horizontal earthquake/vibration isolation system. The invention belongs to apassive self-adaption vibration control method, can be used for buildings affected by environmental vibration, and can isolate seismic oscillation while isolating the environment vibration.

The invention provides a novel three-dimensional seismic isolation device which comprises a horizontal seismic isolation component, a transition steel structural platform and a vertical seismic isolation component. The horizontal seismic isolation component is fixedly connected with the vertical seismic isolation component by the transition steel structural platform; and the vertical seismic isolation component comprises an upper sleeve, a lower sleeve, a lower bottom plate, a belleville spring, a middle guide rod and viscous damping fluid. The novel three-dimensional seismic isolation device is simple and convenient to manufacture and is convenient to construct, install and maintain; horizontal damping and vertical damping are decoupled mutually and are not involved mutually. Due to adoption of the belleville steel plate spring, the novel three-dimensional seismic isolation device has low vertical stiffness when vertically moving, so that the vertical period of an upper structure is prolonged and the earthquake action is reduced; and meanwhile, a good viscous hole is formed by a gap between the belleville spring and the lower sleeve for the viscous damping fluid in the lower sleeve and a butterfly steel plate takes an effect of a piston in a viscous damper, so that the vertical earthquake action is further reduced by energy dissipation and safety of the upper structure is ensured.

The invention discloses a viscous damping limiting method with a limiting device; the limiting device is arranged between a left ear ring and a right ear ring at one side of a conventional viscous damper; the viscous damper is limited through the limiting device when the static load deformation thereof exceeds the design stroke; the limiting device is in an elastic rubber block structure; and the elastic rubber block structure is connected with a piston rod at one end of the viscous damper, and performs the limiting function through the compression of the elastic rubber block when the static load deformation of the viscous damper exceeds the design stroke. The invention has the effects of improving the dynamic response to the structure and generating the limit resistance to the excessive displacement of the structure. Compared with the prior art, the invention has simple structure, and saves cost and installation space.

The invention discloses a suspension type multidimensional impact vibration reduction damper which comprises an external container box. A partition plate with a circular hole is horizontally arranged in the external container box and divides the external container box into two spaces, fluid viscous dampers and springs are arranged on the partition plate, the upper ends of the fluid viscous dampers and the upper ends of the springs are connected with a circular plate which does not make contact with the external container box, the lower ends of the fluid viscous dampers and the lower ends of the springs are connected to the partition plate, the center of the circular plate is provided with a rigid connecting rod which penetrates through the circular hole in the center of the partition plate and is connected with an internal cylinder box, the bottom end of the rigid connecting rod is connected with an internal metal box, a rigid hanging rod is arranged in the internal metal box, and the bottom of the rigid hanging rod is connected with a mass ball. The suspension type multidimensional impact vibration reduction damper can reduce the multidimensional vibration response of a structure under the action of an earthquake or a wind load and can effectively make up for the hidden danger brought by the uncertain direction when a load is generated.

The invention discloses a viscosity energy consumption self-reset shear wall structure with a replaceable bottom. The viscosity energy consumption self-reset shear wall structure with the replaceable bottom comprises at least one structural unit. The structural unit comprises ordinary prefabricated wall sections, a spiral stirrup densification prefabricated wall section, a replaceable wall section arranged on the lower side of the spiral stirrup densification prefabricated wall section, viscous dampers arranged on the two sides of the replaceable wall section, and unbonded prestressed ribs arranged inside a wall body. The spiral stirrup densification prefabricated wall section comprises interior spiral stirrups, embedded plates and vertical connecting plates, wherein the embedded plates are embedded into the interior spiral stirrups, and the vertical connecting plates are connected with the replaceable wall section at the bottom. The replaceable wall section comprises two slotted spiral stirrup densification wall blocks and horizontal connecting plates, wherein the two wall blocks are connected through the horizontal connecting plates. Each viscous damper comprises an upper side support and a lower side support. According to the viscosity energy consumption self-reset shear wall structure with the replaceable bottom, plastic deformation of a prefabricated concrete shear wall can be effectively eliminated, a self-reset shear wall replacement method is simplified, and the cost and the difficulty of replacement conducted after engineering structure earthquakes are substantially reduced.

The invention relates to a tuned mass damper adjustable in three directions. The tuned mass damper is used for the vibration reduction of building construction and bridge engineering structures. The tuned mass damper comprises a bracket (2). Slings (1) are arranged on the upper part of the bracket (2). A mass block (5) is arranged on the lower parts of the slings. Springs (7) are arranged on the lower part of the mass block (5), and are positioned on a bottom plate (8). Viscous dampers (6) are arranged between the mass block (5) and the bottom plate (8). A guide rod (4) is connected to the bottom plate (8). The guide rod (4) and a guide sleeve (3) on the bracket form a guide mechanism to limit horizontal movement between the bracket and the bottom plate. The tuned mass damper can be used for the tuned reduction of the vibration of building construction structures, bridge engineering structures and the like in the three directions, natural vibration frequencies in the three directions can be conveniently adjusted, and the damping ratio of the three directions can also be adjusted according to needs.

The invention relates to a high-performance support component based on self-reset energy dissipation. The high-performance support component comprises a self-reset energy dissipation part (3) and main body support cylinders respectively mounted at two ends of the self-reset energy dissipation part (3), wherein end joints are further arranged on the main body support cylinders; and the self-reset energy dissipation part (3) comprises an outer cylinder (32) and a piston guide rod (31), a viscous damper cavity (33) and a shape memory alloy ring spring group cavity (34) are further arranged in the outer cylinder (32), one end of the piston guide rod (31) sequentially penetrates through the viscous damper cavity (33) and the shape memory alloy ring spring group cavity (34), the other end is fixedly connected with one main body support cylinder, and the other main body support cylinder is further fixedly connected to the outer cylinder (32). Compared with the prior art, the high-performance support component integrates important anti-earthquake functions such as lateral load resistance, bending resistance, self-reset and wide frequency domain energy dissipation, the disadvantage of insufficient energy dissipation of a viscous damper under low frequency and high temperature is improved, and the high-performance support component does not need to be replaced after the earthquake.

The invention provides a vibration and earthquake integrated control structure for building a construction above a subway and a design method thereof. The vibration and earthquake integrated control structure comprises a construction base, a construction foundation, a vibration isolation layer between the construction base and the construction foundation, the vibration isolation layer comprises steel spring absorbers and viscous dampers, wherein the steel spring absorbers are arranged at corresponding positions below the main structural columns of the construction, and the viscous dampers areconnected between the construction foundation and the construction base around the construction. On the basis of this structure, the complete and feasible design method of quantitative analysis and integration has been established. The vibration and earthquake integrated control structure and the design method can meet the requirements of vibration control and operation of the subway as well as earthquake-proof fortification at the same time, and replacement and maintenance are convenient.

An assembly to pivotally connect an external vehicle closure panel to a vehicle body includes a first hinge member that is constructed to be mounted to one of the external vehicle closure panel and the vehicle body, a second hinge member that is constructed to be mounted to the other of the external vehicle closure panel and the vehicle body, a shaft that is constructed to pivotally connect the first hinge member to the second hinge member, and a viscous rotary damper. The damper includes a cover, a rotor, and a viscous material. The shaft connects to the rotor such that rotation of the external vehicle closure panel between a closing position and an opening position causes relative motion between the rotor and the cover of the viscous damper to provide a resistance for controlling the velocity of the external vehicle closure member.

The invention discloses a rocker bearing water tank damper, and belongs to the technical field of energy dissipation and vibration attenuation of civil engineering structures. The rocker bearing water tank damper comprises a plurality of rocker sliding support saddles, a water tank, a damper support saddle, a box column, and a viscous damper; each rocker sliding support saddle comprises an upper support saddle plate, a metal ball and a lower support saddle plate; the upper support saddle plate is fixed at the lower surface of the water tank; the lower support saddle plate is fixed on an upper top plate or a spandrel girder of the structure; the upper saddle plate is opposite to the lower saddle plate; the metal ball is placed in the middle to achieve oppositely sliding between the upper support saddle plate and the lower support saddle plate; the box column is arranged at the bottom part of the water tank; the damper support saddle is arranged on the upper top plate or the spandrel girder of the structure; and the viscous damper is horizontally arranged between the box column and the damper support saddle. By adopting the rocker bearing water tank damper, on one hand, the adverse effect of a high-level water tank on the structure under the horizontal load is removed; and on the other hand, dynamic response of the structure under the horizontal load is greatly reduced by the formed water tank damping system. The rocker bearing water tank damper is stable in damping effect, simple in structure, safe and reliable, good in durability, and strong in designability.

The invention belongs to the technical field of damping (vibration reduction), and particularly relates to a viscous damper. The viscous damper comprises a cylinder body, a cylinder cover, a piston rod, a piston head, a guide sleeve and sealing and viscous damping fluid. The cylinder body and the cylinder cover form a damping cavity, the damping cavity is divided into a first damping chamber and a second damping chamber through the piston head, a two-way holding valve is arranged on the piston head, and the two ends of the two-way holding valve are connected with the first damping chamber and the second damping chamber respectively. According to the viscous damper, the two-way holding valve is arranged on the piston head, when the speed of the viscous damper is larger than the critical speed, due to the fact that force exerted on a valve core of the holding valve is larger than preloaded pressure of a spring, the holding valve is closed, and consequently the output damping force of the viscous damper can reach a rated value. In addition, the viscous damper is compact in structure and convenient to install, and a two-way locking function can be achieved.

The invention relates to a vibration damper, in particular to a viscous damper taking a viscous substance as a vibration damping medium. End covers at the two ends of a cylinder (1) of the damper are elastic bodies (5); the two elastic bodies (5), the cylinder (1) and a piston rod (3) are vulcanized into a whole at high temperature; the elastic body (5) consists of an annular viscoelastic material layer (5-1) and an annular sheet steel layer (5-2) which are alternately laminated and vulcanized at high temperature; and the ratio of the diameter to width of the elastic body (5) is 2 to 4. In the damper of the invention, the elastic bodies (5) at the two ends of the cylinder (1), the cylinder (1) and the piston rod (3) are vulcanized into a whole to form a viscoelastic damper, so that the initial rigidity of the whole damper is remarkably improved.