Double-step high-performance sealed viscous damping wall

Abstract

The double-step high-performance sealed viscous damping wall comprises a viscous damper and steel frames installed at the two ends of the viscous damper, the outer sides of the steel frames are fixedly connected with lug plates, embedded parts are arranged on the side walls of the lug plates, and the two ends of the viscous damper are hinged to the steel frames through gapless spherical hinges; the viscous damper comprises an oil cylinder, a piston and a piston rod, and the oil cylinder is filled with damping liquid; a variable cross-section structure is arranged on the inner wall of the oil cylinder, so that the middle circulation cross section is larger than the cross sections at two ends, and intelligent grading regulation of damping force along with piston displacement is realized; the invention belongs to the technical field of civil engineering damping walls, and achieves the technical effects that the groove is machined in the middle of the oil cylinder, a double-step energy dissipation mechanism is constructed, when a piston moves in the range of the groove, silicone oil can flow through double channels of the enlarged radial gap and the communicating hole, the piston moves to break through the boundary of the groove due to an earthquake, and the damping effect is achieved. And the gap between the piston and the oil cylinder is compressed instantly, so that the comfort under small earthquakes is guaranteed, and high-efficiency dissipation of pulse energy during large earthquakes is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering damping walls, and in particular to a double-stage high-performance sealed viscous damping wall. Background Art

[0002] A building damping wall is a safety device installed on a building to reduce earthquake damage. It is widely used in civil buildings, industrial buildings, bridges, etc. When an earthquake occurs, the damping wall absorbs and consumes the impact energy of the earthquake on the building structure to the maximum extent, greatly alleviating the impact and damage of the earthquake on the building structure.

[0003] However, existing building damping walls still have many defects, such as poor sealing performance of existing damping walls, easy contamination of silicone oil, which affects product performance, and conventional damping walls (open type) cannot be tilted during hoisting, which is more troublesome to assemble.

[0004] A sealed damper is required; the inner wall of the oil cylinder of a normal damper is smooth and has a uniform diameter; the damping cannot be adjusted as needed during use;

[0005] Therefore, the existing needs are not met, and we propose a two-stage high-performance sealed viscous damping wall. Summary of the Invention

[0006] To this end, the present invention provides a dual-stage high-performance sealed viscous damping wall to solve the above-mentioned problems in the prior art.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] According to a first aspect of the present invention, a two-stage high-performance sealed viscous damping wall includes a viscous damper and steel frames installed at both ends of the viscous damper, ear plates are fixedly connected to the outside of the steel frame, and embedded parts are provided on the side walls of the ear plates. The two ends of the viscous damper are hinged to the steel frame through gapless ball joints; the viscous damper includes a cylinder, a piston and a piston rod, and the cylinder is filled with damping fluid; the inner wall of the cylinder is provided with a variable cross-section structure, so that the flow cross-section in the middle is larger than the cross-section at both ends, thereby realizing intelligent graded regulation of the damping force with piston displacement.

[0009] Furthermore, an annular groove is processed in the middle of the inner wall of the oil cylinder to form a stepped cross-section jump; when the piston is located in the groove area, the silicone oil flows through the expanded radial gap and the connecting hole in a dual channel; when the piston displacement exceeds the groove boundary, the radial gap suddenly shrinks, and the silicone oil flows concentratedly through the connecting hole to trigger the cavitation effect.

[0010] Furthermore, the middle portion of the inner wall of the oil cylinder is a straight section, and the diameters at both ends gradually decrease axially outward; when the piston moves toward both ends, the radial gap continuously decreases, and the damping force increases smoothly with displacement.

[0011] Furthermore, the communicating hole on the piston includes a middle steady flow section and a transmission section 1 and a transmission section 2 at both ends; the transmission section 1 and the transmission section 2 are conical expansion structures, and the apertures at both ends are set differently.

[0012] Furthermore, the transmission section 1 and the transmission section 2 are asymmetric tapered expansions, satisfying D1>D2; D1 is the aperture of the liquid inlet end, and D2 is the aperture of the liquid outlet end;

[0013] When the piston moves in the direction of high damping, the damping fluid flows from D1 to D2, triggering the cavitation-dominated energy dissipation mechanism.

[0014] When the piston moves toward the low damping direction, the damping fluid flows from D2 to D1, forming a diffusion laminar flow channel.

[0015] Furthermore, the transmission section 1 and the transmission section 2 are symmetrically tapered and expanded to enhance high-speed turbulent energy dissipation.

[0016] Furthermore, the transmission section 1 and the transmission section 2 are tapered expansions of equal diameter and unequal length, with a length ratio L1 / L2=1.2-2.0, to regulate the damping response lag time.

[0017] Furthermore, the gapless ball joint includes a sphere and a ball joint seat, and the ball joint seat is provided with a connecting groove.

[0018] Furthermore, the inner wall of the connecting groove is connected to the spherical surface of the sphere.

[0019] Furthermore, seal heads are provided at both ends of the oil cylinder, and the seal heads adopt a triple sealing structure of a baffle, a bushing, and a retaining ring; an extension pipe is provided on one side of the oil cylinder to provide redundant movement space for the piston rod.

[0020] The present invention has the following advantages:

[0021] 1. This dual-stage, high-performance sealed viscous damping wall, by precisely machining an annular groove in the middle of the cylinder, constructs a unique dual-stage energy dissipation physical mechanism, enabling the damping wall to maintain a gentle energy dissipation state under the action of small and medium earthquakes. When the piston moves within the groove, silicone oil can simultaneously flow through the expanded radial gap and the connecting hole, increasing the flow area and forming a first-order low damping force dominated by viscous friction, effectively preventing premature rigidification of the structure. In the event of a rare earthquake that causes the piston displacement to break through the groove boundary, the gap between the piston and the inner wall of the standard section of the cylinder is instantly compressed, forcing the silicone oil to flow through the connecting hole, stimulating cavitation and turbulent dissipation under the high-speed jet, thus ensuring both comfort under small earthquakes and efficient dissipation of pulse energy during large earthquakes.

[0022] 2. This dual-stage high-performance sealed viscous damping wall realizes intelligent damping direction identification and graded energy consumption at the mechanical structure level by combining the bidirectional gradient cross-section design of the cylinder with the asymmetric tapered expansion connecting hole on the piston. When the main shock high-energy pulse strikes along the predetermined direction, the piston moves in the high-damping direction (damping fluid flows from D1 to D2), and the small-aperture D2 end triggers a severe cavitation effect under the coordinated flow restriction of the gradient cylinder contraction section. The local micro-jet collapses and dissipates energy instantly, thereby increasing the damping force peak. During structural rebound, the large-aperture D1 end and the expanded gap between the cylinder form a low-resistance diffusion channel, and the damping force is actively reduced, which not only avoids secondary tensile damage to fragile components, but also continuously consumes residual kinetic energy through mild turbulence. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a front view of a double-stage high-performance sealed viscous damping wall proposed by the present invention;

[0024] Figure 2 for Figure 1 Schematic diagram of the decomposition;

[0025] Figure 3 It is a top view;

[0026] Figure 4 It is a cross-sectional view of the telescopic shell;

[0027] Figure 5 This is a cross-sectional view of the oil cylinder;

[0028] Figure 6 It is the front view of the piston;

[0029] Figure 7 It is the main view of the annular groove;

[0030] Figure 8 It is a cross-sectional schematic diagram showing decreasing diameter of the inner wall of the oil chamber;

[0031] Figure 9 It is a cross-sectional diagram of the piston on the inner wall of the cylinder.

[0032] In the figure: 1. Viscous damper; 101. Cylinder; 102. Head; 1021. Baffle; 1022. Bushing; 1023. Retaining ring; 103. Piston; 1031. Connecting hole; 104. Piston rod; 105. Extension pipe; 2. Clearance-free spherical joint; 201. Connecting rod; 202. Ball; 203. Spherical joint seat; 204. Connecting groove; 3. Steel frame; 4. Ear plate; 5. Embedded parts; 6. Experimental connecting hole; 71. Groove; 802. Transmission section 1; 801. Flow stabilization section; 803. Transmission section 2; 9. Telescopic housing; 901. Housing 1; 902. Housing 2; 10. Wall; DETAILED DESCRIPTION

[0033] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0034] Embodiment 1;

[0035] Reference Figure 1-Figure 5 A double-stage high-performance sealed viscous damping wall comprises: a viscous damper 1, steel frames 3 mounted on both ends of the viscous damper 1, each steel frame 3 having an outer side fixedly connected to a lug plate 4; and embedded parts 5 fixedly provided on the side walls of the lug plate 4;

[0036] A gapless spherical joint 2 is provided at the connection between the two ends of the viscous damper 1 and the steel frame 3; the viscous damper 1 and the steel frame 3 are hingedly connected by the gapless spherical joint 2;

[0037] During use: two sets of gapless spherical joints 2 are symmetrically fixedly connected on the inner sides of the steel frames 3 on both sides. A viscous damper 1 is installed between the two sets of gapless spherical joints 2. The viscous damper 1 is anti-corrosive using hot-sprayed zinc and painted. The outer sides of the steel frames 3 are connected to the ear plates 4. The ear plates 4 are fixed to the wall through embedded parts 5. The damping wall is rotated and tilted according to the actual situation on site. Under the action of external loads such as earthquakes or wind loads, the wall 10 of the building drives the steel frames 3 to reciprocate. Since the inner sides of the steel frames 3 are connected to the gapless spherical joints 2 and the viscous dampers 1, a damping force is generated inside the viscous dampers 1, which converts the vibration energy of the input structure into heat energy and consumes it, thereby achieving the purpose of realizing linked energy consumption.

[0038] The piston rod 104 of the viscous damper 1 drives the piston 103 to reciprocate in the cylinder 101 to consume energy;

[0039] Specifically, the viscous damper 1 includes a cylinder 101; a piston 103 is slidably connected to the inner wall of the cylinder 101, and a piston rod 104 is fixedly connected to the middle of the piston 103; the interior of the cylinder 101 is filled with damping fluid, and the two sides of the cylinder 101 are sealed with a head 102. An extension tube 105 is provided at one end of the cylinder 101 to provide a movable space for the movement of the piston rod 104; the head 102 is composed of a baffle 1021, a bushing 1022, and a retaining ring 1023;

[0040] The clearance-free spherical joint 2 includes two connecting rods 201, which are fixedly mounted at both ends of the viscous damper 1, that is, mounted at the output end of the piston rod 104 and the other end of the oil cylinder 101, respectively.

[0041] The end of the connecting rod 201 away from the viscous damper 1 is fixedly connected to the ball 202; the inner side of the steel frame 3 is fixedly connected to the ball joint seat 203; the ball joint seat 203 is provided with a connecting groove 204; the inner wall of the connecting groove 204 is rotatably connected to the outer wall of the ball 202;

[0042] Working principle: When the building undergoes inter-story displacement due to earthquake or wind load, the embedded parts 5 fixed on the walls 10 on both sides drive the ear plates 4 and the steel frame 3 to produce relative movement; this movement is transmitted to the two ends of the viscous damper 1 through the gapless ball joint 2, forcing the piston rod 104 to reciprocate relative to the cylinder 101; when the piston 103 moves in the cylinder 101 filled with damping fluid, the damping fluid is forced to pass through the gap between the piston 103 and the cylinder 101 to form a parallel flow channel with the connecting hole 1031, generating a strong viscous damping force; this damping force is always in the opposite direction to the movement speed of the piston 103, thereby effectively suppressing the vibration of the structure and reducing the vibration of the structure. The input mechanical energy is converted into heat and dissipated. The design of the gapless spherical joint 2 ensures smooth transmission of small rotations in any direction, avoiding bending moments and stress concentration at the connection, and improving the damping wall's adaptability to installation errors and complex deformations. The viscous damper 1 has stable nonlinear damping characteristics, which can significantly reduce the acceleration and displacement response of the structure under earthquake and wind vibration. The gapless spherical joint 2 ensures effective force transmission and device durability. The hot-spray zinc and paint anti-corrosion treatment ensure the long-term service performance of the viscous damper 1 in harsh environments. The installation method is flexible and can be rotated or tilted according to space requirements.

[0043] Example 2:

[0044] The technical problem in the above solution is that the inner diameter of the oil cylinder 101 is consistent; the damping force generated cannot be transformed, and this problem is not solved. Further, referring to Figure 7 A dual-stage high-performance sealed viscous damping wall is provided. A groove 71 is machined in the middle of the oil cylinder 101 of the viscous damper 1 to achieve a variable cross-section. This makes the cross-section of the inner wall of the oil cylinder 101 larger in the middle than at the two ends. When the piston moves in the middle position, silicone oil can overflow through the gap between the piston 103 and the groove 71 and the connecting hole 1031. The flow rate of silicone oil that can pass through is relatively large. When the piston moves to the two ends, the gap between the piston 103 and the groove 71 becomes smaller. The flow rate of silicone oil that can pass through is relatively small. Ultimately, the damper achieves first-order and second-order damping forces, thus realizing dual-stage viscous damping.

[0045] Example 3:

[0046] The problem in the above-mentioned embodiment 2 is that the damping force jump may cause secondary vibration of the structure. To solve this problem, further steps are as follows: Figure 8, a two-stage high-performance sealed viscous damping wall, the middle part of the oil cylinder 101 of the viscous damper 1 is set to a flat surface; the diameters at both ends decrease outward in sequence; a variable cross-section is achieved, so that the cross-section at the middle position of the inner wall of the oil cylinder 101 is larger than the cross-section at both ends. When the piston moves in the middle position, silicone oil can overflow through the gap between the piston 103 and the groove 71 and the connecting hole 1031; the flow rate that silicone oil can pass through is relatively large, and when it moves to both ends, the gap between the piston 103 and the groove 71 becomes smaller; the flow rate that silicone oil can pass through is relatively small, realizing variable-step progressive viscous damping; by comparing the groove design of the second embodiment with the gradual oil cylinder: the damping force increases continuously with the displacement, avoiding structural resonance caused by step-type jumps, and the flow area changes continuously through the gradual cross-section, avoiding hydraulic shock.

[0047] Example 4:

[0048] Basically the same as the third embodiment, Figures 1-9 ; Further: refer to Figure 6 A double-stage high-performance sealed viscous damping wall, wherein all the communicating holes 1031 include a straight steady flow section 801 in the middle and a transmission section 1 802 and a transmission section 2 803 located at both ends of the steady flow section 801;

[0049] The following implementation methods are available based on the combination of aperture and taper:

[0050] A1, transmission section 1 802, and transmission section 2 803 are all straight cylinders with equal diameters, the same as the steady flow section 801;

[0051] Effect: Provides linear damping response and works with the progressive cylinder to achieve smooth damping force increase;

[0052] A2, transmission section 1 802, and transmission section 2 803 are symmetrical conical expansions, with diameters increasing uniformly from the steady flow section 801 to both ends;

[0053] Effect: Enhanced high-speed energy dissipation: When the piston moves toward both ends, the small-diameter end (near the oil chamber) triggers cavitation, increasing the damping force in the large displacement area;

[0054] A3, transmission section 1 802 and transmission section 2 803 are asymmetrically tapered, with unequal maximum diameters at both ends (e.g., D1 > D2);

[0055] Effect: Customized tension and compression damping ratio: cavitation is stimulated in the high damping direction (D1→D2), and flexible reset is achieved in the low damping direction (D2→D1);

[0056] A4, transmission section 1 802, and transmission section 2 803 are equal diameter unequal length conical expansions, with the same expansion angle but different axial lengths;

[0057] Effect: Regulates damping response speed: long flared end has delayed flow, short flared end has quick response;

[0058] A5, transmission section 1 802 and transmission section 2 803 are tapered expansions with different diameters and lengths;

[0059] Effect: Multi-parameter collaborative optimization: matching specific spectrum seismic wave requirements;

[0060] Preferably, A3, transmission section 1 802, and transmission section 2 803 are asymmetrically tapered expansions;

[0061] Assume that the high-damping direction (D1 in -> D2 out, cavitation-dominated) is set as the expected mainshock impact direction; the diameter of D1 is larger than D2; piston 103 moves to the right, and the damping fluid flows to the left. When the high-energy pulse of the mainshock strikes (piston 103 moves in the high-damping direction), viscous damper 1 provides extremely high damping force, maximizing the absorption and dissipation of impact energy through cavitation and strong turbulence mechanisms. When the structure rebounds or encounters a lower-energy reverse motion (piston 103 moves in the low-damping direction, D2 in -> D1 out), the damping force is relatively low, allowing the structure to reset more smoothly, avoiding unnecessary excessive reverse force on the structure (which may cause secondary damage), while still dissipating some energy through expansion and mild turbulence.

[0062] Embodiment 5:

[0063] Basically the same as the first embodiment, Figures 1-4 ; Furthermore: a telescopic shell 9 is set between the two steel frames 3; the telescopic shell 9 includes a shell 1 901 and a shell 2 902; the two are respectively fixedly connected to the inner side of one of the two steel frames 3, and the outer wall of the shell 1 901 is slidably connected to the inner wall of the shell 2 902; an experimental connection hole 6 is left on the steel frame 3, which can be directly connected to the experimental bench, and can be directly removed after the experiment is completed for on-site installation in the project.

Claims

1. A double-stage high-performance sealed viscous damping wall, comprising a viscous damper (1), a steel frame (3) mounted on both ends of the viscous damper (1), an outer side of the steel frame (3) fixedly connected to an ear plate (4), and an embedded part (5) provided on the side wall of the ear plate (4), characterized in that: The two ends of the viscous damper (1) are hinged to the steel frame (3) through a gapless ball joint (2); the viscous damper (1) comprises an oil cylinder (101), a piston (103) and a piston rod (104); the oil cylinder (101) is filled with damping fluid; the inner wall of the oil cylinder (101) is provided with a variable cross-section structure, so that the flow cross-section in the middle is larger than the cross-section at the two ends, thereby realizing intelligent graded regulation of the damping force according to the displacement of the piston.

2. The double-stage high-performance sealed viscous damping wall according to claim 1, characterized in that: An annular groove (71) is machined in the middle of the inner wall of the oil cylinder (101) to form a stepped cross-section jump; when the piston (103) is located in the groove (71) area, the silicone oil circulates through the expanded radial gap and the connecting hole (1031) in a dual channel; when the piston (103) moves beyond the boundary of the groove (71), the radial gap suddenly shrinks, and the silicone oil flows concentratedly through the connecting hole (1031), triggering a cavitation effect.

3. The double-stage high-performance sealed viscous damping wall according to claim 1, characterized in that: The middle portion of the inner wall of the oil cylinder (101) is a straight section (72), and the diameters of both ends decrease gradually outward along the axial direction; when the piston (103) moves toward both ends, the radial gap continuously decreases, and the damping force increases smoothly with the displacement.

4. A dual-stage high-performance sealed viscous damping wall according to any one of claims 1 to 3, characterized in that: The communicating hole (1031) on the piston (103) includes a middle steady flow section (801) and a transmission section 1 (802) and a transmission section 2 (803) at both ends; the transmission section 1 (802) and the transmission section 2 (803) are conical expansion structures, and the apertures at both ends are set differently.

5. The double-stage high-performance sealed viscous damping wall according to claim 4, characterized in that: The transmission section 1 (802) and the transmission section 2 (803) are asymmetric conical expansions, satisfying D1>D2 (D1 is the aperture of the liquid inlet end, and D2 is the aperture of the liquid outlet end); When the piston (103) moves in the high damping direction (damping fluid D1→D2 flow direction), the cavitation-dominated energy dissipation mechanism is triggered; When the piston (103) moves in the low damping direction (damping fluid D2→D1 flow direction), a diffusion laminar flow channel is formed.

6. The double-stage high-performance sealed viscous damping wall according to claim 4, characterized in that: The transmission section 1 (802) and the transmission section 2 (803) are symmetrical conical expansions for enhancing high-speed turbulent energy dissipation.

7. The double-stage high-performance sealed viscous damping wall according to claim 4, characterized in that: The transmission section 1 (802) and the transmission section 2 (803) are tapered expansions of equal diameter and unequal length, with a length ratio L1 / L2=1.2~2.0, to regulate the damping response lag time.

8. The dual-stage high-performance sealed viscous damping wall according to claim 1, characterized in that: The gapless ball joint (2) comprises a sphere (202) and a ball joint seat (203), and the ball joint seat (203) is provided with a connecting groove (204).

9. The dual-stage high-performance sealed viscous damping wall according to claim 8, characterized in that: The inner wall of the connecting groove (204) is connected to the spherical surface of the sphere (202).

10. The double-stage high-performance sealed viscous damping wall according to claim 9, characterized in that: Sealing heads (102) are provided at both ends of the oil cylinder (101), and the sealing heads (102) adopt a triple sealing structure of a baffle (1021), a bushing (1022), and a retaining ring (1023); an extension pipe (105) is provided on one side of the oil cylinder (101) to provide redundant movement space for the piston rod (104).

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