CN113202200B - Self-resetting viscous damper based on combined spring - Google Patents

Abstract

The invention discloses a self-reset viscous damper based on a combined spring, comprising a viscous damping energy dissipation device, a spring return device and a force transmission device. The viscous damping energy dissipation device is linked with the spring return device through the force transmission device, and the transmission The force device includes an outer force transmission member and an inner force transmission member; the outer force transmission member includes a cylinder body, the viscous damping energy dissipation device and the spring return device are all installed in the cylinder body, and the inner force transmission member is a guide rod, and the guide rod is along the cylinder body. Axial arrangement, the piston in the viscous damping energy dissipation device is fixedly connected to the guide rod, and the spring return device includes a return spring member and two pressure-bearing plates respectively arranged at the axial ends of the return spring member, the return spring member and the pressure-bearing plate They are all sleeved on the periphery of the guide rod, and can slide relatively with the guide rod. The self-resetting ability of the invention is excellent and controllable, the energy consumption can be stable under high and low frequency excitation, it has the characteristics of overload protection, the tension and compression performance is symmetrical, the assembly is convenient, and the disassembly and maintenance are easy.

Description

Self-resetting viscous damper based on combined spring

technical field

The invention belongs to the technical field of energy dissipation and shock absorption in civil engineering, and relates to a self-resetting viscous damper based on a combined spring.

Background technique

Energy-dissipating and shock-absorbing structure means that by setting energy-dissipating devices, during the vibration process of the structure, the relative displacement and relative velocity are generated by the structural deformation, so that the energy-dissipating device consumes the structural vibration energy, thereby reducing the seismic response of the structure and meeting the expected seismic design requirements. building structure. Common energy dissipation devices can be divided into displacement dampers (such as friction dampers, metal yield dampers) and velocity dampers (such as viscous dampers, viscoelastic dampers). Although the energy-dissipating and shock-absorbing structures designed in accordance with the requirements of my country's seismic design codes can meet the seismic fortification goals of "not damaged in small earthquakes, repairable in moderate earthquakes, and not collapsed in large earthquakes", however, under the action of strong earthquakes, due to the intrusion of materials into Plastic yielding energy dissipation, the structure will still produce large residual deformation after earthquake. Some existing studies have shown that when the residual displacement angle of the structure is greater than 0.5%, the post-earthquake maintenance cost will be greater than the reconstruction cost, and the demolition and reconstruction of a large number of buildings will bring incalculable economic losses to the society. The self-reset device is introduced into the traditional energy dissipation device, so that the energy dissipation device has both good energy dissipation and self-reset functions, which can not only control the seismic response of the main structure, but also effectively reduce the residual deformation of the structure after the earthquake. Therefore, the structure can be quickly restored to its use function without repairing or a little repairing after the earthquake.

At present, although the existing self-resetting friction dampers and self-resetting metal yield dampers can exhibit typical flag-type hysteresis characteristics under the action of earthquakes, so that the structure has good self-resetting ability, the design needs to meet at least the following requirements. The restoring force provided by the self-resetting device is greater than the resetting resistance of the energy dissipation device (such as frictional force, the resistance force generated after the metal yields), which also limits its energy dissipation capacity during large earthquakes. The damping force generated by the viscous damper is related to the velocity, which can fully consume the seismic energy during the earthquake action. During the slow reset process of the structure after the earthquake, the reset resistance of the viscous damper is much smaller than that of the displacement damper. Therefore, in order to realize the self-reset function of the structure, viscous damping energy dissipation is a more ideal energy dissipation method than friction damping energy dissipation and metal yielding energy dissipation.

In the existing self-resetting viscous damper, the resetting springs on both sides of the balance plate provide the resetting resultant force, and the resetting resultant force is always balanced with the resetting resistance of the damper. When the balance plate is in the initial equilibrium position, no matter whether the return spring is prestressed or not, its resultant reset force is zero; when the damper has a non-negligible initial internal friction force or when the structure undergoes plastic deformation, due to the existence of reset resistance, the balance The plate cannot completely return to the initial equilibrium position, the return spring on one side will be compressed, and the return spring on the other side will be tensioned, which together provide a total reset force to balance the reset resistance. Therefore, the self-resetting damper can only achieve Part of the structure is self-resetting. At the same time, the self-reset viscous damper has limited energy dissipation capacity under low-frequency vibration.

SUMMARY OF THE INVENTION

In order to improve the self-reset capability of the existing self-reset viscous damper and its energy dissipation capability under low-frequency vibration, the present invention proposes a self-reset viscous damper based on a combined spring. Under excitation, they all show excellent energy dissipation capacity and self-reset performance. At the same time, their structure is simple and easy to assemble. The preload of the combined spring can be adjusted according to the design needs, and the residual deformation of the structure can be controlled within the expected design range. Achieve low damage to the structure, thereby reducing the seismic loss of the structure.

The technical scheme adopted by the present invention to solve its technical problems is:

A self-resetting viscous damper based on a combined spring, comprising a viscous damping energy dissipation device, a spring return device and a force transmission device, the viscous damping energy dissipation device is linked with the spring return device through the force transmission device, and the force transmission device includes an external transmission device. The force member and the inner force transmission member; the outer force transmission member includes a cylinder, the viscous damping energy dissipation device and the spring return device are installed in the cylinder, the inner force transmission member includes a guide rod, and the guide rod is arranged along the axial direction of the cylinder body, And it is connected and fixed with the viscous damping energy dissipation device,

The spring reset device includes a reset spring member and two pressure-bearing plates that are respectively arranged at two axial ends of the reset spring member, and each of the pressure-bearing plates is sleeved on the periphery of the guide rod and can be movably arranged along the guide rod;

The return spring is sleeved on the periphery of the guide rod, and can be guided internally by the guide rod;

When the guide rod is pulled or compressed, among the two pressure-bearing plates of the spring return device, the pressure-bearing plate at the front end of the guide rod's force-bearing direction is kept in place by the axial limit of the external force-transmitting member, and is in the guide rod's position. The pressure-bearing plate at the rear end of the rod in the direction of force, under the action of the thrust generated by the movement of the guide rod, can move synchronously with the movement of the guide rod, so as to squeeze the reset spring member, and promote the reset spring member to generate a self-resetting resultant force to The buffer guide rod moves and automatically resets after the force on the guide rod is removed.

Preferably, the return spring is a combined spring, including an annular spring group and a disc spring set, the disc spring set includes a plurality of disc springs, and each disc spring is sequentially sleeved between two pressure-bearing plates The outer guide of the guide rod can be guided by the guide rod, and the inner guide can be realized by the guide rod. The annular spring group is sleeved on the outer periphery of the disk spring group, and can realize the outer guidance through the inner wall of the cylinder, and the inner diameter of the annular spring group is larger than that of the disk spring group. At the same time, the gap between the ring spring group and the disc spring group can always avoid contact interference after the two are compressed and deformed; the axial ends of the disk spring group and the ring spring group correspond to the above The two pressure-bearing plates abut against each other.

Preferably, the spring return device includes two, corresponding to a first and a second spring return device, respectively located on both axial sides of the viscous damping energy dissipation device;

Both ends of the cylinder body are open, and the two open ends of the cylinder body are respectively installed with a first compression nut and a second compression nut;

The cylinder body is arranged in sections, and is sequentially divided into a first spring sleeve, a viscous energy dissipation steel cylinder, a second spring sleeve, and a second spring sleeve auxiliary cylinder;

The viscous damping energy dissipation device is installed in the viscous energy dissipation steel cylinder, and the first and second spring return devices are respectively installed in the first spring sleeve and the second spring sleeve;

One end of the guide rod is exposed on the outside of the first compression nut and is connected with the first earring. Two spring sleeves in the auxiliary cylinder.

Preferably, the first spring sleeve, the viscous energy-dissipating steel cylinder, the second spring sleeve, and the second spring sleeve auxiliary cylinder are independent components, and the first spring sleeve, the viscous energy-dissipating steel cylinder The cylinder, the second spring sleeve and the second spring sleeve auxiliary cylinder are sequentially spliced to form the cylinder body;

At the splicing position of the viscous energy-dissipating steel cylinder and the first spring sleeve, the outer diameter of the viscous energy-dissipating steel cylinder is smaller than the inner diameter of the first spring sleeve, which promotes the two pressure-bearing of the first spring return device in the initial state The plate can be axially limited by the first compression nut and the viscous energy-dissipating steel cylinder;

At the splicing position of the viscous energy-dissipating steel cylinder and the second spring sleeve, the outer diameter of the viscous energy-dissipating steel cylinder is smaller than the inner diameter of the second spring sleeve, which promotes the two bearing pressures of the second spring return device in the initial state. The plate can be axially limited by the second spring sleeve auxiliary cylinder and the viscous energy dissipation steel cylinder.

Preferably, both ends of the viscous energy-consuming steel cylinder are provided with flanges, corresponding to flanges a and b;

One end of the first spring sleeve is provided with a flange c docked with the flange a, and the other end is connected with the first compression nut by means of screw connection; when the first spring return device is in the initial state, a The pressure-bearing plate on one side is pressed against the inner surface of the first compression nut, and the pressure-bearing plate on the other side is pressed against the end face of the viscous energy-dissipating steel cylinder connected to the end of the flange a;

One end of the second spring sleeve is provided with a flange d that is docked with the flange b, and the other end is connected with the second spring sleeve sub-cylinder by means of screw connection; when the second spring reset device is in the initial state , the pressure-bearing plate on one side is in close contact with the inner end face of the second spring sleeve sub-cylinder, and the pressure-bearing plate on the other side is in close contact with the end face of the viscous energy-dissipating steel cylinder connected with the flange b.

Preferably, the viscous damping energy dissipation device is a viscous energy dissipation piston assembly, comprising a first damping end cap, a piston, a second damping end cap and a viscous damping fluid;

The first damping end cap and the second damping end cap are sleeved on the periphery of the guide rod at intervals, and are respectively fixed with the inner wall of the viscous energy dissipation steel cylinder to form a closed chamber, and the closed chamber is filled with the viscous damping fluid;

The piston is arranged between the first damping end cap and the second damping end cap, and is fixed with the guide rod; meanwhile, the piston is distributed with orifices for the circulation of the viscous damping fluid;

The guide rod is provided with a first threaded sleeve, a second threaded sleeve, a first block, and a second block;

The two pressure-bearing plates of the first spring return device, the pressure-bearing plate arranged on the outside is the first pressure-bearing plate, and the pressure-bearing plate arranged on the inner side is the second pressure-bearing plate; the two pressure-bearing plates of the second spring return device plate, the pressure-bearing plate arranged on the inner side is the third pressure-bearing plate, and the pressure-bearing plate arranged on the outer side is the fourth pressure-bearing plate;

The first stopper is arranged between the second pressure-bearing plate and the first damping end cover, the first threaded sleeve is arranged on the outside of the first pressure-bearing plate; the second stopper is arranged between the third pressure-bearing plate and the third pressure-bearing plate. Between the two damping end covers, the second screw sleeve is arranged on the outer side of the fourth bearing plate;

When the first and second spring return devices are in the initial state, the first block is in contact with the second pressure-bearing plate, the first threaded sleeve is in contact with the first pressure-bearing plate after passing through the first compression nut; the second stopper is in contact with the first pressure-bearing plate. The third pressure-bearing plate is abutted against, and the second screw sleeve is abutted against the fourth pressure-bearing plate;

When the guide rod is pulled, the first screw sleeve is separated from the first bearing plate, and the first bearing plate is axially limited by the first compression nut, and the first stopper pushes the second bearing plate toward the first bearing plate The pressure plate moves, and the combined spring of the first spring return device is compressed to generate a self-resetting resultant force; at the same time, the third pressure bearing plate is axially limited by the right end face of the viscous energy-dissipating steel cylinder, and the second stopper and The third pressure-bearing plate is separated, the second screw sleeve pushes the fourth pressure-bearing plate to move toward the third pressure-bearing plate, and the combined spring of the second spring return device is compressed to generate a self-resetting resultant force;

When the guide rod is pressed, the second pressure-bearing plate is axially limited by the left end face of the viscous energy-dissipating steel cylinder, the first stopper is separated from the second pressure-bearing plate, and the first screw sleeve passes through the first pressure After the nut, push the first pressure-bearing plate to move toward the second pressure-bearing plate, and the combined spring of the first spring return device is compressed to generate a self-resetting resultant force; at the same time, the fourth pressure-bearing plate passes through the second spring sleeve sub-cylinder The inner end face of the spring is axially limited, the second screw sleeve is separated from the fourth bearing plate, the second stopper pushes the third bearing plate to move towards the fourth bearing plate, and the combined spring of the second spring return device is compressed A self-resetting resultant force is generated.

Preferably, a first guide sleeve is arranged between the piston and the first damping end cover, and a second guide sleeve is arranged between the piston and the second damping end cover, and both the first guide sleeve and the second guide sleeve are connected to the guide rod. form a sliding seal.

Preferably, the guide rod is a variable-diameter round rod, comprising a middle section of the guide rod, an outer section of the first guide rod and an outer section of the second guide rod respectively arranged on both sides of the middle section of the guide rod; the first and second guide rods The diameter of the outer section is smaller than the diameter of the middle section of the guide rod; the middle section of the guide rod is respectively provided with a first groove and a second groove; the first block is embedded in the first groove, and the second block is embedded in the second groove.

Preferably, both the first block and the second block are composed of two identical half-rings with grooves along the perimeter. The groove setting shaft is clamped by a retaining spring, so that the first block and the second block are respectively fixed at the first groove of the guide rod and the second groove of the guide rod.

Preferably, the ring-shaped spring group is composed of several identical outer rings with inner conical surfaces and inner rings with outer conical surfaces; the disc spring group is composed of several identical disc-shaped steel sheets by stacking or a combination of involution;

The annular spring group of the first spring return device is the first annular spring group, the disc spring group of the first spring return device is the first disc spring group; the annular spring group of the second spring return device is the second annular spring group, The disc spring group of the second spring return device is the second disc spring group;

The first spring sleeve is the outer guide of the first annular spring group, and the inner diameter of the first spring sleeve is larger than the outer diameter of the first annular spring group, and the gap between the first spring sleeve and the first annular spring group satisfies Guide clearance requirements;

The second spring sleeve is the outer guide of the second annular spring group, and the inner diameter of the second spring sleeve is larger than the outer diameter of the second annular spring group, and the gap between the second spring sleeve and the second annular spring group satisfies Guide clearance requirements;

The guide rod is used as the inner guide for the first and second disk spring groups; the diameter of the guide rod is smaller than the inner diameter of the disk spring group, and the gap between the guide rod and the disk spring group also meets the requirements of the guide gap.

According to the above-mentioned technical scheme, compared with the prior art, the beneficial effects of the present invention are:

1. The damper provided by the present invention adopts a spring return device (return spring, two pressure-bearing plates) and a force transmission device (external force transmission member, inner force transmission member) with a specific structural form, so that the damper can be Whether it is under tension or compression, the pressure-bearing plate on one side of the return spring (the front end of the guide rod in the force direction) realizes the axial limit through the external force transmission member, and is on the other side of the return spring (the guide rod). The pressure-bearing plate at the rear end of the force direction) will move synchronously with the movement of the guide rod, thereby squeezing the return spring member, so that the return spring member generates a self-resetting force to buffer the movement of the guide rod, and after the external force is removed, Realize the self-reset function of the damper. It can be seen that during the working process of the present invention, due to the interaction between the outer force transmission member (cylinder) and the inner force transmission member (guide rod), the spring return device is always subjected to axial compression, thereby avoiding the unfavorable tension of the spring. state, to maximize the good compression characteristics of the spring, so that the damper has excellent self-resetting ability. With this specific structure, when the damper is in the initial state, since both ends of the spring return device are limited, the preload of the spring return device will form a self-balance inside the damper. When the external force on the guide rod is greater than the sum of the preload of the spring return device, the guide rod will move; when the external force on the guide rod is less than the sum of the preload, the guide rod will always be in the initial equilibrium position, so when applying When the sum of the preload in the spring return device is greater than the sum of the initial internal friction force of the damper and the return resistance generated by the expected plastic deformation of the main structure, both the damper and the main structure can achieve complete self-reset.

2. The present invention innovatively uses the combined spring formed by the parallel connection of the disc spring and the annular spring as the return spring, so that when the damper of the present invention is applied to the building structure support, the damping effect of the building structure support on the damping is satisfied. The rigidity and strength requirements of the return spring of the device.

Generally, a disc spring can bear a large load with a small deformation, so it has better self-returning ability than other types of springs. The ring spring has a high buffering and vibration damping capacity, and its energy storage capacity per unit volume of material is larger than that of other types of springs, and can provide a friction energy dissipation mechanism that is independent of the loading frequency. The disc spring is composed of a number of disc-shaped steel sheets, and the ring spring is composed of a number of outer rings and a number of inner rings. However, the force transmission system of the damper of the present invention can just prevent the spring from being in an unfavorable tension state, but instead maximizes the good compression characteristics of the spring, so that the damper has excellent self-resetting ability. Based on the above technical facts, the present invention uses the guide rod as the inner guide of the disc spring and the cylinder as the outer guide of the ring spring. In the compressed state, the lateral stiffness and bearing capacity of the damper can be effectively improved without changing the outer diameter of the damper. can stably dissipate energy; in addition, the combined spring has the characteristics of overload protection. When the disc spring group or the ring spring group is fully compressed, the displacement of the guide rod will be limited due to the maximum spring deformation, thus avoiding the Overload damage of damper.

3. The present invention realizes the pre-pressure adjustment of the combined spring through a simple structure (threaded connection between the first compression nut and the first spring sleeve; Specifically, the present invention can adjust the preload of the combined spring in the first spring return device by adjusting the screwing depth of the first compression nut in the first spring sleeve; by adjusting the second spring sleeve and the second spring sleeve The pre-pressure in the combined spring in the second spring return device is adjusted by the length of the rotation between the cylinder and the auxiliary cylinder, so as to realize the controllability of the self-resetting ability of the damper, thereby reducing or even completely eliminating the residual deformation of the structure after the earthquake. Simple operation and reliable force transmission.

4. The combined springs are symmetrically arranged on both sides of the viscous energy dissipation device. Therefore, the damper has good tension and compression symmetry. No matter whether the damper is tensioned or compressed, the combined springs on both sides of the viscous energy dissipation device will are further compressed synchronously;

5. Each component of the self-resetting viscous damper of the present invention has clear functions, the components are connected by threads and high-strength bolts, and the force transmission is reliable, the assembly is convenient, and the disassembly and maintenance are convenient.

Description of drawings

Fig. 1 is the longitudinal sectional view of the self-resetting viscous damper based on combined spring of the present invention;

Figure 2 is a schematic diagram of the structure of the viscous damping energy dissipation device;

Fig. 3 is the structural schematic diagram of the left spring return device;

Fig. 4 is the structural schematic diagram of the right spring return device;

Fig. 5 is the structural schematic diagram of the external force transmission member;

Fig. 6 is the structural schematic diagram of the internal force transmission member;

Figure 7 is a schematic diagram of the tension state of the self-resetting viscous damper;

Figure 8 is a schematic diagram of a self-resetting viscous damper under pressure;

Fig. 9a is a longitudinal sectional view of a viscous energy dissipation steel cylinder; Fig. 9b is an A-A sectional view of a viscous energy dissipation steel cylinder;

Fig. 10a is a longitudinal sectional view of the first spring sleeve; Fig. 10b is a B-B sectional view of the first spring sleeve;

11a is a C-C sectional view of the second spring sleeve, and FIG. 11b is a longitudinal sectional view of the second spring sleeve and;

Figure 12a is a longitudinal sectional view of the second spring sleeve sub-cylinder; Figure 12b is a D-D sectional view of the second spring sleeve sub-cylinder;

Figure 13a is an E-E sectional view of the guide rod; Figure 13b is a longitudinal sectional view of the guide rod;

Figure 14a is a F-F sectional view of the first screw sleeve; Figure 14b is a longitudinal sectional view of the first screw sleeve;

Figure 15a is a longitudinal sectional view of the second screw sleeve; Figure 15b is a G-G sectional view of the second screw sleeve;

FIG. 16 is a three-dimensional schematic view of the first stopper/second stopper configuration.

Description of each mark in the figure:

1- The first earring, 2- The first screw sleeve, 3- The first compression nut, 4- The first bearing plate, 5- The first spring sleeve, 6- The first ring spring group, 7- The first disc Shape spring group, 8- second bearing plate, 9- viscous energy dissipation steel cylinder, 10- first damping end cover, 11- first guide sleeve, 12- viscous damping fluid, 13- piston, 14- first Two guide sleeves, 15- the second damping end cover, 16- the third bearing plate, 17- the second spring sleeve, 18- the second ring spring group, 19- the second disc spring group, 20- the fourth bearing Pressure plate, 21-Second screw sleeve, 22-Second spring sleeve sub-cylinder, 23-Second compression nut, 24-Second earring connecting bolt, 25-Second earring, 26-Guide rod, 261-Guide The first outer section of the rod, 262 - the middle section of the guide rod, 263 - the second outer section of the guide rod, 264 - the first groove of the guide rod, 265 - the second groove of the guide rod, 27 - the first stopper, 28 - the first Second stop, 29-first high-strength bolt, 30-second high-strength bolt.

Detailed ways

The present invention will be further described below through specific embodiments and accompanying drawings. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

As shown in Figures 1 to 16, a self-resetting viscous damper based on a combined spring includes a viscous damping energy dissipation device, a spring return device and a force transmission device, and the force transmission device makes the viscous damping energy dissipation device and the spring return The devices work together. The viscous damping energy dissipation device is located in the middle of the self-resetting viscous damper, and consists of the piston 13, the first guide sleeve 11, the second guide sleeve 14, the first damping end cap 10, the second damping end cap 15 and the viscous damping fluid 12, the viscous damping fluid 12 is silicone oil. The spring reset device includes two spring reset devices, which are respectively located on the left and right sides of the viscous damping energy dissipation device to ensure that the damper is symmetrical in tension and compression. Each spring return device is composed of an annular spring group, a disc spring group and a pressure bearing plate. The annular spring group and the disc spring group are combined in parallel, which can provide high lateral stiffness and strength. The force transmission device includes an outer force transmission member and an inner force transmission member. The outer force transmission member consists of a viscous energy dissipation steel cylinder 9, a first spring sleeve 5, a second spring sleeve 17, a second spring sleeve auxiliary cylinder 22, a first The compression nut 3, the second compression nut 23 and the second earring 25 are composed. The inner force transmission member is composed of the first earring 1, the guide rod 26, the first screw sleeve 2, the second screw sleeve 21, the first stopper 27 and the The second stopper 28 is formed.

FIG. 2 is a schematic diagram of the structure of the viscous damping energy dissipation device. The viscous damping fluid 12 is filled in the closed cavity formed by the viscous energy dissipation steel cylinder 9 , the first guide sleeve 11 and the second guide sleeve 14 , and the piston 13 is distributed with orifices for the circulation of the viscous damping fluid 12 , and it is fixedly connected with the guide rod 26; the first guide sleeve 11 and the second guide sleeve 14 make the guide rod 26 maintain stable axial movement, and perform sliding sealing with the guide rod 26; the first damping end cover 10 and The second damping end cover 15 is fixedly connected to the inner wall of the viscous energy dissipation steel cylinder 9 , and the distance between the first damping end cover 10 and the left end face of the viscous energy dissipation steel cylinder 9 is greater than the stroke of the damper and the thickness of the first stopper 27 In sum, the distance between the second damping end cover 15 and the right end face of the viscous energy dissipation steel cylinder 9 is greater than the sum of the damper stroke and the thickness of the second stopper 28 .

FIG. 3 and FIG. 4 are schematic diagrams of the structure of the left spring return device and the right spring return device, respectively. The first annular spring group 6 and the second annular spring group 18 are both formed by a plurality of identical outer rings with inner conical surfaces and inner rings with outer conical surfaces. The two spring sleeves 17 serve as the outer guides of the first annular spring group 6 and the second annular spring group 18 respectively. The inner diameter of the spring sleeve is larger than the outer diameter of the annular spring group, and the gap between the spring sleeve and the annular spring group satisfies The requirements of the guide clearance prevent the outer diameter of the ring spring group from contacting and interfering with the spring sleeve after being loaded. The guide rod 26 is used as the inner guide of the first disc spring set 7 and the second disc spring set 19. The diameter of the guide rod 26 is smaller than the inner diameter of the disc spring set, and the guide rod 26 is connected to the inner diameter of the disc spring set. The gap between the disc spring sets also meets the requirements of the guide gap, preventing the reduction of the inner diameter of the disc spring set after being loaded and the contact interference with the guide rod 26; the inner diameter of the ring spring set is larger than the outer diameter of the disc spring set, and the ring spring set and the The gap between the disc spring groups satisfies that there is no contact interference after the two are compressed and deformed.

The first pressure-bearing plate 4, the second pressure-bearing plate 8, the third pressure-bearing plate 16 and the fourth pressure-bearing plate 20 are circular pressure-bearing plates of the same size with a circular hole in the center, and the outer diameter of the pressure-bearing plates is smaller than that of the spring sleeve The inner diameter of the cylinder and the diameter of the central circular hole of the pressure-bearing plate are larger than the diameter of the guide rod 26 to ensure that the pressure-bearing plate can slide relative to the spring sleeve and the guide rod 26 .

FIG. 5 is a schematic diagram of the structure of the external force transmission member. The viscous energy-dissipating steel cylinder 9, as shown in Figures 9a and 9b, is a circular-section steel pipe with flanges fixedly connected at both ends, the first spring sleeve 5 and the second spring sleeve 17 The structure is similar, as shown in Figure 10a, Figure 10b, Figure 11a, Figure 11b, all of which are circular section steel pipes with one end fixedly connected with a flange; the first spring sleeve 5 and the second spring sleeve 17 have inner diameter, outer The diameters are equal, and the inner diameter is larger than the outer diameter of the viscous energy-dissipating steel cylinder 9; the first spring sleeve 5 and the viscous energy-dissipating steel cylinder 9 are connected by the first high-strength bolts 29, and the second spring sleeve 17 and the viscous energy-dissipating steel cylinder 9 are connected. The energy-consuming steel cylinder 9 is also connected by a second high-strength bolt 30 .

The first compression nut 3 and the first spring sleeve 5 are connected by threads, and the first annular spring group 6 and the first annular spring group 6 can be adjusted by adjusting the screwing depth of the first compression nut 3 in the first spring sleeve 5. The pre-pressure in the disc spring group 7; the second spring sleeve 17 and the second spring sleeve sub-cylinder 22 are also connected by threads, and the difference between the second spring sleeve 17 and the second spring sleeve sub-cylinder 22 can be adjusted. The preload in the second ring spring group 18 and the second disc spring group 19 can be adjusted by adjusting the length of screwing between them. The structure of the second spring sleeve sub-cylinder 22 is shown in Figures 12a and 12b. The second earring 25 and the second earring connecting bolt 24, the second earring connecting bolt 24 and the second pressing nut 23, and the second pressing nut 23 and the second spring sleeve sub-cylinder 22 are all connected by threads.

FIG. 6 is a schematic diagram of the structure of the internal force transmission member. 13a, 13b, the guide rod 26 is a variable diameter round rod, the diameter of the first outer section 261 of the guide rod and the diameter of the second outer section 263 of the guide rod are smaller than the diameter of the middle section 262 of the guide rod, and the middle section 262 of the guide rod is opened The first groove 264 and the second groove 265 with equal width and depth; the first earring 1 and the first threaded sleeve 2 are connected to the first outer section 261 of the guide rod through threads, and the structure of the first threaded sleeve 2 is shown in Figure 14a , as shown in Figure 14b. The second threaded sleeve 21 is connected to the second outer section 263 of the guide rod through threads. The structure of the second threaded sleeve 21 is shown in Figures 15a and 15b; the structures of the first block 27 and the second block 28 are shown in Figure 16 As shown, they are composed of two identical half-rings with grooves along the perimeter. After the two half-rings are inserted into the grooves of the guide rods, the shafts are set along the grooves of the half-rings to clamp them with circlips. Tighten, so that the first block 27 and the second block 28 are respectively fixed at the first groove 264 of the guide rod and the second groove 265 of the guide rod.

Set forth the concrete method steps of applying the present invention below:

(1) Assembling the viscous damping energy dissipation device: Install the first guide sleeve 11 and the first damping end cover 10 on the left end of the viscous energy dissipation steel cylinder 9 in sequence, and then move the guide rod 26 fixed with the piston 13 from the viscous dissipation The right end of the energy steel cylinder 9 is inserted, and passes through the first guide sleeve 11 and the first damping end cover 10 in sequence, and then the viscous damping liquid 12 is injected into the viscous energy dissipation steel cylinder 9. A second guide sleeve 14 and a second damping end cover 15 are sequentially installed on the right end of the viscous energy-dissipating steel cylinder 9;

(2) Assembling the left spring return device: after inserting the two half-rings of the first stopper 27 into the first groove 264 of the guide rod, then clamp it with the shaft circlip, and then use the same method to fix the first The second block 28 is fixed in the second groove 265 of the guide rod. Next, install the second pressure bearing plate 8, the first disc spring group 7, the first annular spring group 6 and the first pressure bearing plate 4 on the left end of the viscous damping energy dissipation device in sequence, and then install the first compression nut 3 and the first pressure bearing plate 4 in sequence. The first spring sleeve 5 is connected into a whole by screwing, and the first spring sleeve 5 is pressed by the jack, so as to apply pre-pressure to the first disc spring group 7 and the first ring spring group 6 until the first spring The flange of the sleeve 5 is tightly pressed against the left flange of the viscous energy-consuming steel cylinder 9, and then the output of the jack is kept unchanged, and the high-strength bolts 29 are installed and tightened, so that the first disc spring group 7 and the first The pre-pressure in the ring spring group 6 forms a self-balance in the damper, and finally the jack is removed and the first screw sleeve 2 and the first earring 1 are installed;

(3) Assembling the right spring return device: Install the third pressure bearing plate 16, the second disc spring group 19, the second annular spring group 18 and the fourth pressure bearing plate 20 on the right end of the viscous damping energy dissipation device in sequence, and then install the The second spring sleeve 17 and the second spring sleeve sub-cylinder 22 are connected into a whole by screwing, and the second spring sleeve sub-cylinder 22 is pressed by the jack, so as to give the second disc spring group 19 and the second annular The spring group 18 applies pre-pressure until the flange of the second spring sleeve 17 and the right flange of the viscous energy-dissipating steel cylinder 9 are pressed against each other, and then the output of the jack is maintained unchanged, and the high-strength bolts 30 are installed and tightened. Make the pre-pressure in the second disc spring group 19 and the second ring spring group 18 self-balance in the damper, finally remove the jack, and install the second screw sleeve 21, the second compression nut 23 and the second earring 25 in sequence .

The working principle of the present invention is described below:

As shown in FIG. 7 , when the damper is pulled, the guide rod 26 moves to the left, and the first pressure bearing plate 4 and the third pressure bearing plate 16 are respectively affected by the first compression nut 3 and the viscous energy dissipation steel cylinder. 9 does not move, and the first stopper 27 and the second screw sleeve 21 fixed on the guide rod 26 drive the second pressure-bearing plate 8 and the fourth pressure-bearing plate 20 to also move along with the movement of the guide rod 26, respectively. Move to the left so that the combined spring is compressed.

As shown in FIG. 8 , when the damper is pressed, the guide rod 26 moves to the right, and the second pressure-bearing plate 8 and the fourth pressure-bearing plate 20 are affected by the viscous energy-dissipating steel cylinder 9 and the second spring sleeve respectively. The auxiliary cylinder 22 is restricted from moving, and the first screw sleeve 2 and the second stopper 28 fixed on the guide rod 26 drive the first bearing plate 4 and the third bearing plate 16 respectively with the movement of the guide rod 26 Also moved to the right so that the combined spring is also compressed. Therefore, no matter whether the damper is under tension or compression, the relative movement of the outer force transmission member and the inner force transmission member will cause the first annular spring group 6, the first disc spring group 7, the second annular spring group 18 and the first annular spring group 18. When the two disc spring groups 19 are further squeezed, the self-resetting resultant force generated by the combined spring increases with the increase of its compression deformation, and the self-resetting resultant force also always pushes the damper guide rod 26 back to the initial equilibrium position. At the same time, both the ring spring set and the disc spring set have the characteristics of overload protection. When the disc spring set or the ring spring set is fully compressed, since the spring deformation reaches the maximum, the displacement of the guide rod 26 will be limited, thereby avoiding damping. overload damage of the device.

When the first annular spring group 6 and the second annular spring group 18 are compressed, the outer ring with the inner conical surface and the inner ring with the outer conical surface in the annular spring group will slide relative to each other along the mating conical surface , and a tangential friction force is generated on the sliding surface, which can convert the energy input by the earthquake into thermal energy for dissipation. When the first disc spring set 7 and the second disc spring set 19 are compressed, the disc-shaped steel sheet will deform, and the frictional damping on its surface can also dissipate part of the energy input by the earthquake, and when the disc-shaped steel sheet is This energy dissipation effect will be more pronounced when superimposed combinations are performed. The damping force produced by the ring spring pack and disc spring pack is independent of the load speed.

In short, when the guide rod is pulled or compressed, among the two pressure-bearing plates of the spring return device, the pressure-bearing plate at the front end of the force direction is kept in place by the axial support of the external force transmission member, The pressure-bearing plate at the rear end of the force-bearing direction can move synchronously with the movement of the guide rod under the action of the thrust generated by the movement of the guide rod, so as to squeeze the return spring member and promote the return spring member to generate a self-resetting resultant force to The buffer guide rod moves and automatically resets after the force on the guide rod is removed.

In other words, when the first and second spring return devices are in the initial state, as shown in Figure 1, the first stopper is in contact with the second pressure-bearing plate, and the first screw sleeve passes through the first compression nut and The first pressure-bearing plate is abutted; the second stopper is abutted against the third pressure-bearing plate, and the second screw sleeve is abutted against the fourth pressure-bearing plate;

When the guide rod is pulled, as shown in Figure 7, the first screw sleeve is separated from the first bearing plate, and the first bearing plate is axially limited by the first compression nut, and the first stopper pushes the second bearing plate The pressure plate moves toward the first pressure plate, and the combined spring of the first spring return device is compressed to generate a self-resetting force; at the same time, the third pressure plate is axially limited by the inner wall of the cylinder, and the second stopper Separated from the third pressure-bearing plate, the second screw sleeve pushes the fourth pressure-bearing plate to move toward the third pressure-bearing plate, and the combined spring of the second spring return device generates a self-resetting resultant force after being compressed;

When the guide rod is pressed, as shown in Figure 8, the second pressure-bearing plate is axially limited by the inner wall of the cylinder, the first stopper is separated from the second pressure-bearing plate, and the first screw sleeve passes through the first pressure plate. After tightening the nut, push the first bearing plate to move toward the second bearing plate, and the combined spring of the first spring return device is compressed to generate a self-reset resultant force; at the same time, the fourth bearing plate is pivoted through the inner wall of the cylinder. To the limit, the second Liang Luotao is separated from the fourth bearing plate, the second block pushes the third bearing plate to move toward the fourth bearing plate, and the combined spring of the second spring return device is compressed to generate a self-resetting resultant force.

At the same time, when the guide rod 26 reciprocates, it will drive the piston 13 to reciprocate in the viscous energy-consuming steel cylinder 9, and the viscous damping fluid 12 on both sides of the piston 13 passes through the orifice on the piston in the closed cavity. Therefore, a large throttling resistance is generated, and the energy input by the earthquake is converted into heat energy for dissipation, and the magnitude of the damping force increases with the increase of the reciprocating speed of the guide rod 26 .

During the working process of the self-resetting viscous damper of the present invention, the viscous energy dissipation device plays a major role in energy dissipation, and the spring return device enables the damper to have excellent self-resetting ability, and at the same time makes up for the low frequency of the viscous energy dissipation device. The lack of limited energy dissipation capacity under vibration. When the sum of the initial preload applied by the spring return device is greater than the sum of the initial internal friction force of the damper and the reset resistance generated by the plastic deformation of the main structure, both the damper and the main structure can achieve complete self-reset; and When the sum of the initial preload applied by the spring return device is less than the sum of the initial internal friction force of the damper and the return resistance after the plastic deformation of the main structure, the residual deformation of the damper and the main structure after the earthquake will be reduced. , to achieve partial self-reset.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (9)

1. A self-resetting viscous damper based on a combined spring comprises a viscous damping energy consumption device, a spring resetting device and a force transmission device, wherein the viscous damping energy consumption device is linked with the spring resetting device through the force transmission device, and the force transmission device comprises an outer force transmission component and an inner force transmission component; outer power transmission component includes the barrel, and viscous damping power consumption device, spring resetting means all install in the barrel, and interior power transmission component includes the guide arm, and the guide arm is arranged along the axial of barrel to be connected fixedly, its characterized in that with viscous damping power consumption device: the spring resetting device comprises a resetting spring part and two bearing plates which are respectively arranged at two axial ends of the resetting spring part, and each bearing plate is sleeved on the periphery of the guide rod and can be movably arranged along the guide rod;

the reset spring part is sleeved on the periphery of the guide rod and can realize internal guide through the guide rod;

the two spring resetting devices are correspondingly a first spring resetting device and a second spring resetting device and are respectively positioned at the two axial sides of the viscous damping energy consumption device; two ends of the cylinder are provided with openings, and a first compression nut (3) and a second compression nut (23) are respectively and correspondingly installed at the two open ends of the cylinder;

the cylinder body is arranged in a segmented manner and is sequentially segmented into a first spring sleeve (5), a viscous energy-consuming steel cylinder (9), a second spring sleeve (17) and a second spring sleeve auxiliary cylinder (22);

the viscous damping energy dissipation device is arranged in a viscous energy dissipation steel cylinder (9), and the first spring return device and the second spring return device are respectively and correspondingly arranged in the first spring sleeve (5) and the second spring sleeve (17);

one end of the guide rod is exposed out of the outer side of the first compression nut (3) and is connected with the first earring (1), and the other end of the guide rod sequentially passes through the first spring resetting device, the viscous damping energy dissipation device and the second spring resetting device and then is positioned in the second spring sleeve auxiliary cylinder (22);

when the guide rod is pulled or pressed, the bearing plate at the front end of the stress direction of the guide rod in the two bearing plates of the spring resetting device is kept in place by axial limiting of the external force transmission member, and the bearing plate at the rear end of the stress direction of the guide rod can synchronously move along with the movement of the guide rod under the action of thrust generated by the movement of the guide rod so as to extrude the resetting spring part and promote the resetting spring part to generate self-resetting resultant force to buffer the movement of the guide rod, and the spring resetting device automatically resets after the stress of the guide rod is eliminated.

2. The unitized spring-based self-resetting viscous damper of claim 1, wherein: the reset spring part is a combined spring and comprises an annular spring group and a disc spring group, the disc spring group comprises a plurality of disc springs, each disc spring is sequentially sleeved on the periphery of a guide rod between two bearing plates and can realize internal guide through the guide rod, the annular spring group is sleeved on the periphery of the disc spring group and can realize external guide through the inner wall of the barrel, the inner diameter of the annular spring group is larger than the outer diameter of the disc spring group, and meanwhile, a gap between the annular spring group and the disc spring group meets the requirement that the annular spring group and the disc spring group can always avoid contact interference after being deformed under pressure; the two axial ends of the disk spring set and the annular spring set are correspondingly abutted against the two bearing plates.

3. The unitized spring-based self-resetting viscous damper of claim 2, wherein: the first spring sleeve (5), the viscous energy-consuming steel cylinder (9), the second spring sleeve (17) and the second spring sleeve auxiliary cylinder (22) are mutually independent components, and the first spring sleeve (5), the viscous energy-consuming steel cylinder (9), the second spring sleeve (17) and the second spring sleeve auxiliary cylinder (22) are sequentially spliced to form the cylinder body;

at the splicing position of the viscous energy-consuming steel cylinder (9) and the first spring sleeve (5), the outer diameter of the viscous energy-consuming steel cylinder (9) is smaller than the inner diameter of the first spring sleeve (5), so that the two pressure-bearing plates of the first spring resetting device in an initial state can be axially limited by the first compression nut and the viscous energy-consuming steel cylinder (9) respectively;

at the splicing position of the viscous energy consumption steel cylinder (9) and the second spring sleeve (17), the outer diameter of the viscous energy consumption steel cylinder (9) is smaller than the inner diameter of the second spring sleeve (17), so that the two pressure bearing plates of the second spring resetting device in the initial state can be axially limited through the second spring sleeve auxiliary cylinder (22) and the viscous energy consumption steel cylinder (9).

4. The unitized spring-based self-resetting viscous damper of claim 3, wherein: flanges are arranged at the two ends of the viscous energy-consuming steel cylinder (9) and correspond to the flange a and the flange b;

one end of the first spring sleeve (5) is provided with a flange plate c butted with the flange plate a, and the other end of the first spring sleeve is connected with the first compression nut in a threaded connection mode; when the first spring resetting device is in an initial state, the bearing plate on one side is tightly propped against the inner side surface of the first compression nut, and the bearing plate on the other side is tightly propped against the end face of one end, connected with the flange a, of the viscous energy-consuming steel cylinder (9);

one end of the second spring sleeve (17) is provided with a flange d butted with the flange b, and the other end of the second spring sleeve is connected with the second spring sleeve auxiliary barrel (22) in a threaded connection mode; when the second spring resetting device is in an initial state, the bearing plate on one side is tightly propped against the end face of the inner side of the second spring sleeve auxiliary cylinder (22), and the bearing plate on the other side is tightly propped against the end face of one end, connected with the flange b, of the viscous energy-consuming steel cylinder (9).

5. The unitized spring-based self-resetting viscous damper of claim 3, wherein: the viscous damping energy consumption device is a viscous energy consumption piston assembly and comprises a first damping end cover (10), a piston (13), a second damping end cover (15) and viscous damping liquid (12);

the first damping end cover (10) and the second damping end cover (15) are sleeved on the periphery of the guide rod (26) at intervals and are fixed with the inner wall of the viscous energy-consuming steel cylinder (9) respectively to form a closed cavity, and the viscous damping fluid (12) is filled in the closed cavity;

the piston (13) is arranged between the first damping end cover (10) and the second damping end cover (15) and is fixed with the guide rod;

meanwhile, throttle holes for viscous damping fluid (12) to circulate are distributed on the piston (13);

the guide rod is provided with a first threaded sleeve (2), a second threaded sleeve (21), a first stop block (27) and a second stop block (28);

the two bearing plates of the first spring resetting device, the bearing plate arranged on the outer side is a first bearing plate (4), and the bearing plate arranged on the inner side is a second bearing plate (8); the two bearing plates of the second spring resetting device, the bearing plate arranged on the inner side is a third bearing plate (16), and the bearing plate arranged on the outer side is a fourth bearing plate (20);

the first stop block (27) is arranged between the second bearing plate (8) and the first damping end cover (10), and the first threaded sleeve (2) is arranged on the outer side of the first bearing plate (4); the second stop block (28) is arranged between the third bearing plate (16) and the second damping end cover (15), and the second threaded sleeve (21) is arranged on the outer side of the fourth bearing plate (20);

when the first spring resetting device and the second spring resetting device are in an initial state, the first stop block (27) abuts against the second bearing plate (8), and the first threaded sleeve (2) penetrates through the first compression nut (3) and then abuts against the first bearing plate (4); the second stop block (28) abuts against the third bearing plate (16), and the second threaded sleeve (21) abuts against the fourth bearing plate (20);

when the guide rod is pulled, the first threaded sleeve (2) is separated from the first bearing plate (4), the first bearing plate (4) is axially limited through the first compression nut (3), the first stop block (27) pushes the second bearing plate (8) to move towards the first bearing plate (4), and the combined spring of the first spring resetting device generates self-resetting resultant force after being pressed; meanwhile, the third bearing plate (16) is axially limited through the right end face of the viscous energy consumption steel cylinder (9), the second stop block (28) is separated from the third bearing plate, the second threaded sleeve (21) pushes the fourth bearing plate to move towards the third bearing plate, and the combined spring of the second spring resetting device generates self-resetting resultant force after being pressed;

when the guide rod is pressed, the second bearing plate (8) is axially limited through the left end face of the viscous energy-consuming steel cylinder (9), the first stop block (27) is separated from the second bearing plate (8), the first threaded sleeve (2) penetrates through the first compression nut (3) and pushes the first bearing plate (4) to move towards the second bearing plate (8), and the combined spring of the first spring resetting device is pressed to generate self-resetting resultant force; meanwhile, the fourth bearing plate (20) is axially limited through the end face of the inner side of the second spring sleeve auxiliary barrel (22), the second threaded sleeve (21) is separated from the fourth bearing plate (20), the second stop block (28) pushes the third bearing plate (16) to move towards the fourth bearing plate (20), and the combined spring of the second spring resetting device generates self-resetting resultant force after being pressed.

6. The unitized spring-based self-resetting viscous damper of claim 5, wherein: a first guide sleeve (11) is arranged between the piston and the first damping end cover (10), a second guide sleeve (14) is arranged between the piston and the second damping end cover (15), and sliding seals are formed between the first guide sleeve (11) and the guide rod and between the second guide sleeve (14) and the guide rod.

7. The unitized spring-based self-resetting viscous damper of claim 6, wherein: the guide rod (26) is a variable-diameter round rod and comprises a guide rod middle section (262), a guide rod first outer side section (261) and a guide rod second outer side section (263), wherein the guide rod first outer side section (261) and the guide rod second outer side section (263) are respectively arranged on two sides of the guide rod middle section (262); the diameters of the outer sections of the first guide rod and the second guide rod are smaller than the diameter of the middle section (262) of the guide rod; a first groove (264) and a second groove (265) are respectively arranged on the middle section (262) of the guide rod; the first stopper (27) is fitted in the first recess (264), and the second stopper (28) is fitted in the second recess (265).

8. A unitized spring-based self-resetting viscous damper according to claim 7, further comprising: the first stop block (27) and the second stop block (28) are both composed of two identical half ring pieces with grooves formed along the circumference, after the two half ring pieces are inserted into the grooves of the guide rod, shafts are arranged along the grooves of the half ring pieces to clamp the half ring pieces through snap springs, and the first stop block (27) and the second stop block (28) are respectively fixed at the first groove (264) of the guide rod and the second groove (265) of the guide rod.

9. The unitized spring-based self-resetting viscous damper of claim 3, wherein: the annular spring group is formed by matching a plurality of identical outer circular rings with inner conical surfaces and inner circular rings with outer conical surfaces; the disc spring group is formed by combining a plurality of same disc-shaped steel sheets in an overlapping or involutory mode;

the annular spring group of the first spring resetting device is a first annular spring group (6), and the disc spring group of the first spring resetting device is a first disc spring group (7); the annular spring group of the second spring resetting device is a second annular spring group (18), and the belleville spring group of the second spring resetting device is a second belleville spring group (19);

the first spring sleeve (5) is used for guiding the first annular spring group (6) outwards, the inner diameter of the first spring sleeve (5) is larger than the outer diameter of the first annular spring group (6), and meanwhile the gap between the first spring sleeve (5) and the first annular spring group (6) meets the requirement of a guide gap;

the second spring sleeve (17) is used for guiding the second annular spring set (18) outwards, the inner diameter of the second spring sleeve (17) is larger than the outer diameter of the second annular spring set (18), and meanwhile the gap between the second spring sleeve (17) and the second annular spring set (18) meets the requirement of a guide gap;

the guide rod (26) is used as the inner guide of the first disc spring set (7) and the second disc spring set (19); the diameter of the guide rod (26) is smaller than the inner diameter of the disc spring set, and the gap between the guide rod (26) and the disc spring set also meets the requirement of a guide gap.

Images