CN116290439A - A self-resetting viscous damper with variable damping - Google Patents

Abstract

The invention discloses a self-resetting viscous damper with variable damping, which comprises a reset cylinder and a damping cylinder connected coaxially, a moving connecting rod is arranged through the reset cylinder; a reset spring is arranged in the reset cylinder, and one end of the reset spring is connected to the The moving connecting rod is connected, and the other end is connected with the end of the reset cylinder facing away from the damping cylinder; the part of the moving connecting rod located in the damping cylinder is sleeved with a turntable, and the outer surface of the turntable is connected with a piston. The damping cylinder is connected; the turntable and the piston are provided with through holes; the damping cylinder is filled with damping medium; the present invention realizes a good reset ability through the return spring, avoids the problem of difficult reset and replacement of the damper at the epicenter and after the earthquake, and also The adverse effect on the equipment due to residual displacement is avoided; since there are multiple groups of through holes with different inner diameters on the turntable, the damping size of the damper can be adjusted according to the needs, and the applicability of the damper can be improved.

Description

A self-resetting viscous damper with variable damping

technical field

The invention relates to the technical field of dampers, in particular to a self-resetting viscous damper with variable damping.

Background technique

my country is located between the circum-Pacific seismic belt and the Eurasian seismic belt. Since the 20th century, nearly 800 earthquakes of magnitude 6 or above have occurred in China.

Shock absorption technology is to install energy-dissipating devices in certain parts of the structure, through which friction, bending (or shearing, torsion), elastoplastic (or viscoelastic) hysteretic deformation is used to dissipate or absorb the energy input by the earthquake , to reduce the seismic response of the main structure, thereby avoiding structural damage or collapse, and achieving the purpose of shock absorption control. The viscous damper realizes the function of shock absorption through the principle of throttling resistance generated when the fluid moves through the orifice. It is currently widely used in high-rise buildings, bridges, anti-seismic reconstruction of building structures, anti-vibration of industrial pipeline equipment, military industry and other fields. .

At present, during the use of existing viscous dampers, due to different use scenarios and equipment used, the required damping force is also different, so different dampers need to be customized to meet the requirements. This not only makes troubles, but also the applicability of the device is not strong. Secondly, because the existing viscous dampers do not have the self-resetting function after the earthquake, the structure will have a large residual deformation, which will affect the ability of the structure to resist the earthquake when the next earthquake comes. Therefore, it is of great scientific significance and engineering practical value to develop a new self-resetting viscous damper with variable damping that can overcome the defects of traditional viscous dampers.

Contents of the invention

Aiming at the deficiencies in the prior art, the object of the present invention is to provide a self-resetting viscous damper with variable damping, which solves the problems of troublesome production of the viscous damper in the prior art, poor applicability and lack of post-earthquake A problem with the self-resetting function.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions to achieve: a self-resetting viscous damper with variable damping, including a reset cylinder and a damping cylinder connected coaxially, and a moving coupling is arranged through the reset cylinder. rod;

One end of the moving connecting rod passes through one end of the reset cylinder and a first connecting piece is installed at the end passing through the reset cylinder, and one end of the moving connecting rod passes through the other end of the reset cylinder and extends into the damping cylinder;

The end of the damping cylinder facing away from the reset cylinder is also connected with a fixed connecting rod, and a second connecting piece is installed on the fixed connecting rod;

A reset spring is arranged inside the reset cylinder, one end of the reset spring is connected to the moving connecting rod, and the other end is connected to the end of the reset cylinder facing away from the damping cylinder;

The part of the moving connecting rod located in the damping cylinder is sleeved with a turntable, and the outer casing of the turntable is connected with a piston, and the piston is connected to the damping cylinder through a piston slide rail arranged on the inner wall of the damping cylinder;

The turntable is provided with at least two first through holes, and the two first through holes are symmetrically distributed along the center of the turntable, and the piston is provided with a plurality of second through holes with different diameters;

The damping cylinder is filled with a damping medium;

The moving link can rotate to drive the turntable to rotate, and the flow velocity of the damping medium can be adjusted by adjusting the positional relationship between the first through hole and the second through hole, so as to achieve the purpose of adjusting damping.

The present invention also has the following technical features:

The part of the moving connecting rod located in the reset cylinder is also sleeved with a rotating baffle, and the outer cover of the rotating baffle is connected with a baffle, and the described baffle is connected to the reset cylinder through a baffle slide rail arranged on the inner wall of the reset cylinder;

The return spring includes an upper return spring and a lower return spring;

One end of the upper return spring is connected to the baffle, the other end is connected to the end of the reset cylinder facing away from the damping cylinder, one end of the lower return spring is connected to the baffle, and the other end is connected to the damping cylinder;

The damping cylinder includes a hollow cylindrical damping cylinder, an upper plate covering one end of the damping cylinder and a lower plate covering the other end of the damping cylinder, and the moving rod runs through the upper plate;

The upper plate is connected to the reset cylinder;

A sealing plate is arranged inside the damping cylinder, a damping cavity is formed between the sealing plate and the upper plate, and the damping medium is filled in the damping cavity;

The moving rod runs through the sealing plate;

A liquid inlet hole and a liquid outlet hole are also provided on the damping cylinder corresponding to the damping cavity;

Both the first connecting piece and the second connecting piece are spherical bearings;

Compared with the prior art, the present invention has the following technical effects:

(I) the present invention realizes good resetting capability by the return spring, avoids the problem of difficult reset and replacement of the damper at the epicenter and after the earthquake, and also avoids the adverse effect on the equipment due to residual displacement; in addition, the present invention can also be achieved by The rotating connecting rod drives the turntable to rotate, so that the through holes between the turntable and the piston correspond to each other. Since there are multiple sets of through holes with different inner diameters on the turntable, the damping of the damper can be adjusted according to the needs, and the applicability of the damper can be improved. .

(II) When the damping device of the present invention is subjected to a relatively large load and the displacement of the front and rear ends of the damping device is too large, the movement of the moving link drives the spring to produce stretching or compression deformation, and the spring can be used for initial pre-stressing at the epicenter and after the earthquake. Tension or pre-compression exerts a self-resetting function. In addition, the invention patent also has the advantages of simple factory production and convenient on-site installation, and has high practical value and economic benefits.

(III) The overall structure of the present invention has the characteristics of simple structure, low cost, high bearing capacity, high reliability, and easy maintenance.

Description of drawings

Fig. 1 is the overall structural representation of the present invention;

Figure 2 is a sectional view of A-A in Figure 1

Fig. 3 is the sectional view of B-B in Fig. 1;

Fig. 4 is the sectional view of C-C in Fig. 1;

Fig. 5 is a schematic diagram of the installation position of the present invention;

The meanings of each label in the accompanying drawings:

1-reset cylinder; 2-damping cylinder; 3-moving connecting rod; 4-first connecting piece; 5-second connecting piece; 6-fixed connecting rod; 7-returning spring, 8-turntable; 9-piston; Piston slide rail; 11-first through hole; 12-second through hole; 13-damping medium; 14-rotating baffle; 15-baffle; 16-baffle slide rail;

2-1 damping cylinder, 2-2 upper plate, 2-3 lower plate, 2-4 sealing plate, 2-5 damping cavity, 2-6 liquid inlet hole, 2-7 liquid outlet hole;

7-1 upper return spring, 7-2 lower return spring;

The specific content of the present invention will be further explained in detail below in conjunction with the examples.

Detailed ways

Specific embodiments of the present invention are provided below, and it should be noted that the present invention is not limited to the following specific embodiments, and all equivalent transformations done on the basis of the technical solutions of the present application all fall within the protection scope of the present invention.

The orientations or positional relationships indicated by the terms "upper", "lower", "front", "rear", "top", "bottom" and the like used in the present invention are only for the convenience of describing the present invention and simplifying the description, rather than indicating or It is implied that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, "inner" and "outer" refer to the inner and outer of the corresponding component outline, and the above terms should not be construed as limiting the present invention.

In the present invention, terms such as "mounted", "connected", "connected" and "fixed" should be interpreted in a broad sense, for example, it can be a fixed connection or a detachable connection unless otherwise specified. Or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

All components in the present invention, unless otherwise specified, all adopt components known in the prior art.

Example 1:

According to the above technical solution, as shown in Figure 1-5, a self-resetting viscous damper with variable damping includes a coaxially connected reset cylinder 1 and a damping cylinder 2, and a moving connecting rod 3;

One end of the moving connecting rod 3 passes through one end of the reset cylinder 1 and the end passing through the reset cylinder 1 is also equipped with a first connecting piece 4, and one end of the moving connecting rod 3 passes through the other end of the reset cylinder 1 And extend into the damping cylinder 2;

The end of the damping cylinder 2 facing away from the reset cylinder 1 is also connected with a fixed connecting rod 6, and the second connecting piece 5 is installed on the fixed connecting rod 6;

A reset spring 7 is arranged in the reset cylinder 1, one end of the reset spring 7 is connected to the moving connecting rod 1, and the other end is connected to the end of the reset cylinder 1 facing away from the damping cylinder 2;

The return spring 7 can adjust the strength of the self-resetting function by adjusting the initial pre-tension or pre-compression.

The return spring is welded on the moving connecting rod 3 and the return barrel 1, and resets by using the initial pre-tension or pre-compression of the spring after the vibration and shock.

The part of the moving connecting rod 3 located in the damping cylinder 2 is sleeved with a turntable 8, and the piston 9 is sleeved on the outer surface of the turntable 8, and the piston 9 is connected to the damping cylinder 2 through a piston slide rail 10 arranged on the inner wall of the damping cylinder 2. ;

The turntable 8 is provided with at least two first through holes 11, and the two first through holes 11 are symmetrically distributed along the center of the turntable 8, and the piston 9 is provided with a plurality of second through holes 12 with different diameters;

In this embodiment, as shown in Figures 2 and 3, four first through holes 11 are provided on the turntable 8, and the four first through holes 11 are distributed symmetrically at 90° along the turntable 8, and the piston 9 is provided with Four groups of second through holes 12, each group of second through holes 12 include three through holes arranged in a circular array and whose diameter decreases sequentially in the clockwise direction, wherein the diameter of the largest through hole among the second through holes 12 is the same as that of the first through hole. A through hole 11 has the same diameter;

The damping cylinder 2 is filled with a damping medium 13;

The moving link 3 can rotate to drive the turntable 8 to rotate, and the flow velocity of the damping medium 13 can be adjusted by adjusting the positional relationship between the first through hole 11 and the second through hole 12 to achieve the purpose of adjusting damping.

For example, when the through hole with the largest diameter in the second through hole 12 corresponds to the position of the first through hole 11, the flow velocity of the damping medium 13 is the largest and the damping is the smallest; when the through hole with the smallest diameter in the second through hole 12 and When the positions of the first through holes 11 are corresponding, the flow velocity of the damping medium 13 is the smallest and the damping is the largest; the damping size of the damper can be adjusted as required to improve the applicability of the damper.

The application scene of the present invention is generally a frame, or some important nodes, as shown in Figure 5, the self-resetting viscous damper with variable damping in the figure is installed at the connection between the beam and the longitudinal beam of the frame structure, and one end is connected to the On the beam, the other end is connected to the longitudinal beam, if the length is not enough, you can lengthen the moving link 3;

Under the action of an earthquake, the displacement of the crossbeam and the longitudinal beam drives the compression or extension of the return spring 7 in the return cylinder 1, and the strength of the self-reset function can be adjusted by adjusting the initial preload or pretension of the return spring 7, thereby avoiding It solves the problem of difficult reset and replacement of general dampers at the epicenter and after the earthquake, and also avoids the adverse impact on equipment due to residual displacement.

Simultaneously, the moving rod 3 stretches out or retracts the damping cylinder 2, and the turntable 8 and the piston 9 on the moving rod 3 move in the damping cylinder 2, so that the damping medium 13 passes through the first through hole 11 and the second through hole 12, and the resulting knot The flow resistance realizes energy consumption. According to different requirements, the connecting rod 3 can be rotated to drive the turntable 8 to rotate, and an appropriate diameter of the second through hole 12 can be selected to achieve different damping coefficients.

As a kind of preference of this embodiment:

The part of the moving link 3 located in the reset cylinder 1 is also sleeved with a rotating baffle 14, and the rotating baffle 14 is sleeved with a baffle 15, and the baffle 15 slides through the baffle arranged on the inner wall of the reset cylinder 1. The rail 16 is connected with the reset cylinder 1; the baffle plate 15 cannot rotate, but the rotating baffle plate 14 can rotate;

As a kind of preference of this embodiment:

The return spring 7 includes an upper return spring 7-1 and a lower return spring 7-2;

One end of the upper return spring 7-1 is connected to the baffle 15, and the other end is connected to the end of the reset cylinder 1 facing away from the damping cylinder 2. One end of the lower return spring 7-2 is connected to the baffle 15, and the other end is connected to the damper 2. The damping cylinder 2 is connected;

The return spring 7 adopts a double spring design, the force on the baffle 15 is more uniform, and the baffle 15 can be restored to the middle position of the reset cylinder 1;

As a kind of preference of this embodiment:

The damping cylinder 2 includes a hollow cylindrical damping cylinder 2-1, an upper plate 2-2 covering one end of the damping cylinder 2-1 and a lower plate 2 covering the other end of the damping cylinder 2-1 -3, the moving rod 3 runs through the upper plate 2-2;

The upper plate 2-2 is connected to the reset cylinder 1;

A sealing plate 2-4 is arranged inside the damping cylinder 2-1, a damping cavity 2-5 is formed between the sealing plate 2-4 and the upper plate 2-2, and the damping medium 13 is filled In the damping cavity 2-5;

The moving rod 2 runs through the sealing plate 2-4;

The damping cylinder 2 adopts a damping cylinder 2-1 and an upper plate 2-2 and a lower plate 2-3 covering both ends of the damping cylinder 2-1, which are convenient for loading and unloading and maintenance; the design of the damping cylinder 2-1 is the same.

As a kind of preference of this embodiment:

The position corresponding to the damping cavity 2-5 on the damping cylinder 2-1 is also provided with a liquid inlet hole 2-6 and a liquid outlet hole 2-7; the liquid inlet hole 2-6 and the liquid outlet hole 2- 7. It is convenient to add damping medium after installation.

As a kind of preference of this embodiment:

The first connector 4 is -1 and the second connector 5 is a spherical bearing;

The spherical support includes a sphere and a spherical shell. The connection of the spherical support enables the damping device of the present invention to be subjected to force along the axis when relative displacement occurs at the connection points at both ends, and it is convenient to rotate the turntable after installation to adjust the damping.

Concrete working process of the present invention:

When in use, first rotate the moving connecting rod 3 according to the required damping size, so that the moving connecting rod 3 drives the turntable 8 and the rotating baffle 14 connected to it to rotate. Since the piston 9 and the damping cylinder 2 are connected by the piston slide rail 10, And the baffle plate 15 is connected with the reset cylinder 1 by the baffle plate slide rail 16, so when the connecting rod 2 is rotated and moved, the piston 9 and the baffle plate 15 connected to the inside of the damping cylinder 2 do not rotate, and due to the upper position of the turntable 8 A first through hole 11 is opened, and a plurality of second through holes 12 with different diameters are opened on the piston 9;

Therefore, when the turntable 8 is rotated, the second through holes 12 with different inner diameters can be adjusted to correspond to the first through holes 11. When the earthquake comes, the damper moves, and the moving connecting rod 3 and the damping cylinder 2 move relatively, so that the moving connecting rod 3 and the damping cylinder 2 move relatively. 3. The connected turntable 8 drives the piston 9 to slide in the damping cavity 2-5. During the sliding process of the piston 9, the damping medium 13 filled in the damping cavity 2-5 passes through the first through hole 11 and the second through hole. The hole 12 moves to the other side of the piston 9. Since the second through hole 12 contains a plurality of through holes with different diameters, the second through hole 12 of different sizes can be selected, and the flow speed of the damping medium 13 is different, so by adjusting the rotating disk The relative position of 8 and piston 9 can change the damping size of the damper.

When the earthquake comes, the damper moves, and the rotating baffle plate 12 connected with the moving link 3 will also drive the baffle plate 15 to slide in the reset cylinder 1. During the sliding process of the baffle plate 15, the return spring 7 will stretch or Compression, through the initial preload or pretension of the return spring 7, the self-resetting function of the damper at the epicenter and after the earthquake is realized.

Those skilled in the art can understand that the modules in the devices in the implementation scenario can be distributed among the devices in the implementation scenario according to the description of the implementation scenario, or can be located in one or more devices different from the implementation scenario according to corresponding changes. The modules of the above implementation scenarios can be combined into one module, or can be further split into multiple sub-modules.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any person familiar with the art is within the technical scope disclosed in the present invention, without creative work. All changes or replacements are covered within the protection scope of the present invention.

Claims (6)

1. A self-resetting viscous damper with variable damping, comprising a coaxially connected reset cylinder (1) and a damping cylinder (2), the reset cylinder (1) is provided with a moving link (3) throughout ; It is characterized in that one end of the moving link (3) passes through one end of the reset cylinder (1) and the end of the reset cylinder (1) is also equipped with a first connecting piece (4), and the moving One end of the connecting rod (3) passes through the other end of the reset cylinder (1) and extends into the damping cylinder (2); The end of the damping cylinder (2) facing away from the reset cylinder (1) is also connected with a fixed link (6), and a second connecting piece (5) is installed on the fixed link (6); A reset spring (6) is arranged inside the reset cylinder (1), one end of the reset spring (6) is connected to the moving link (1), and the other end is connected to the end of the reset cylinder (1) facing away from the damping cylinder (2) ; The part of the moving connecting rod (3) located in the damping cylinder (2) is sleeved with a turntable (8), and the outer casing of the turntable (8) is connected with a piston (9), and the piston (9) passes through the damping cylinder. (2) The piston slide rail (10) on the inner wall is connected with the damping cylinder (2); The turntable (8) is provided with at least two first through holes (11), and the two first through holes (11) are center-symmetrically distributed along the center of the turntable (8), and the piston (9) is provided with multiple A second through hole (12) with different apertures; The damping cylinder (2) is filled with a damping medium (13); The moving connecting rod (3) can rotate to drive the turntable (8) to rotate, and adjust the flow velocity of the damping medium (13) by adjusting the positional relationship between the first through hole (11) and the second through hole (12) to achieve adjustment damping purpose. 2. The self-resetting viscous damper with variable damping according to claim 1, characterized in that, the part of the moving link (3) located in the reset cylinder (1) is also sleeved with a rotating baffle (14 ), the rotating baffle (14) is covered with a baffle (15), and the baffle (15) is connected with the reset cylinder (1) through the baffle slide rail (16) arranged on the inner wall of the reset cylinder (1). 3. The self-resetting viscous damper with variable damping according to claim 2, characterized in that, the return spring (6) includes an upper return spring (7-1) and a lower return spring (7-2) ; One end of the upper return spring (7-1) is connected to the baffle (15), the other end is connected to the end of the return cylinder (1) facing away from the damping cylinder (2), and the lower return spring (7-2) One end is connected with the baffle (15), and the other end is connected with the damping cylinder (2). 4. The self-resetting viscous damper with variable damping as claimed in claim 3, characterized in that, the damping cylinder (2) comprises a hollow cylindrical damping cylinder (2-1) and a damping cylinder covered with The upper plate (2-2) at one end of the cylinder (2-1) and the lower plate (2-3) covering the other end of the damping cylinder (2-1), the moving rod (3) runs through the upper plate (2-2); The upper plate (2-2) is connected to the reset cylinder (1); A sealing plate (2-4) is also arranged inside the damping cylinder (2-1), and a damping cavity (2-4) is formed between the sealing plate (2-4) and the upper plate (2-2). 5), the damping medium (13) is filled in the damping cavity (2-5); The moving pull rod (2) runs through the sealing plate (2-4). 5. The self-resetting viscous damper with variable damping according to claim 4, characterized in that, the position corresponding to the damping cavity (2-5) on the damping cylinder (2-1) A liquid inlet hole (2-6) and a liquid outlet hole (2-7) are also provided. 6. The self-resetting viscous damper with variable damping according to claim 1, characterized in that, both the first connecting member (4) and the second connecting member (5) are spherical bearings.

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