Hydraulic friction damper

Abstract

The application is a hydraulic friction damper, which comprises a cylindrical outer cavity shell, a plurality of pairs of cavities are arranged on the inner wall of the outer cavity shell at both ends of the outer cavity shell, a piston is arranged between each pair of cavities, the piston penetrates into the corresponding cavity at both ends, an arc-shaped partition plate is arranged in the cavity and divides the cavity into a first hydraulic chamber and a second hydraulic chamber, a plurality of communication pipes for connecting the first hydraulic chamber and the second hydraulic chamber are arranged on the outer wall of the outer cavity shell, a hydraulic valve is arranged on the communication pipe, an inner telescopic sleeve is connected to both ends of the piston, an outer telescopic sleeve is arranged on the outer side of the inner telescopic sleeve, a spring is connected between the inner telescopic sleeve and the outer telescopic sleeve, a through hole is arranged in the center of the arc-shaped partition plate, and an arc-shaped plug head matched with the arc-shaped partition plate is connected to the outer telescopic sleeve after penetrating out of the through hole. Compared with the traditional friction damper, the application has stronger energy consumption capacity, the friction force can be increased with the increase of the relative displacement of the pull rod, and the pressure reset can be realized by adjusting the hydraulic valve.

Description

Technical Field

[0001] This invention relates to the field of damper technology, and more particularly to a hydraulic friction damper. Background Technology

[0002] Dampers are used to dissipate energy and reduce vibration, and are widely used in the fields of architecture and mechanical engineering. Friction dampers are a very popular type of damper due to their simple structure and low cost. Friction dampers are a type of control device that dissipates vibration energy by utilizing the friction of frictional surfaces. Traditional friction dampers heavily rely on the friction coefficient between the relatively sliding surfaces. In passive friction dampers, the maximum frictional resistance is a predetermined constant value during design. Because the intensity of seismic forces acting on building structures cannot be accurately predicted, using this type of friction damper as a vibration reduction component in building structures presents a problem of not being able to simultaneously handle both strong and weak vibrations. Summary of the Invention

[0003] The present invention aims to address the shortcomings of the prior art by providing a hydraulic friction damper.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a hydraulic friction damper, comprising a cylindrical outer shell, with several pairs of cavities evenly distributed around the inner wall of the outer shell at both ends. A piston is slidably disposed between each pair of cavities, with both ends of the piston penetrating into the corresponding cavity. An arc-shaped partition is disposed within the cavity, dividing it into a first hydraulic cavity and a second hydraulic cavity. Several connecting pipes for connecting the first and second hydraulic cavities are disposed on the outer wall of the outer shell, with hydraulic valves disposed on the connecting pipes. Inner telescopic sleeves are connected to both ends of the piston, and an outer telescopic sleeve is slidably disposed on the outer side of the inner telescopic sleeve. A spring is connected between the inner and outer telescopic sleeves. A through hole is provided in the center of the arc-shaped partition, and an arc-shaped plug matching the arc-shaped partition is connected to the outer telescopic sleeve after it passes through the through hole. Inner shells that slide along the cavities are respectively disposed at both ends of the inner shell. A pull rod is disposed at the axis of the inner shell, and a fixed rod is connected between the piston and the pull rod. A friction energy dissipation plate is inserted between the pull rod and the opposite surface of the inner shell.

[0005] Specifically, the thickness of the inner shell is less than that of the outer shell.

[0006] Specifically, the inner shell is made of aluminum, while the outer shell is made of high-strength steel.

[0007] In particular, the friction energy dissipation plate is made of high-damping rubber.

[0008] The beneficial effects of this invention are as follows: This invention moves the piston in the first hydraulic chamber and controls the flow direction of the hydraulic oil in the first hydraulic chamber through the arc-shaped plug, spring, inner telescopic sleeve and outer telescopic sleeve, so that the hydraulic oil flows in the second hydraulic chamber, thereby increasing the pressure in the second hydraulic chamber. The circumferential pressure increases the frictional resistance between the friction energy dissipation plates, and energy is dissipated through the relative deformation between the friction energy dissipation plates.

[0009] This invention dissipates energy by converting the relative displacement of the tie rod into frictional force on the friction-dissipating plate. Compared with traditional friction dampers, it has a stronger energy dissipation capacity. The frictional force increases with the relative displacement of the tie rod, and pressure can be reset by adjusting the hydraulic valve. Using this damper as a vibration reduction component in building structures can effectively solve the problem of not being able to simultaneously handle strong and weak vibrations. Attached Figure Description

[0010] Figure 1 This is a cross-sectional schematic diagram of the present invention;

[0011] Figure 2 This is a schematic diagram of the cavity distribution of the present invention;

[0012] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0013] Figure 4 This is a schematic diagram showing that the arc-shaped plug has not yet opened when the pull rod is displaced in this invention;

[0014] Figure 5 This is a schematic diagram showing the opening of the arc-shaped plug as the displacement of the pull rod increases in this invention;

[0015] Figure 6 This is a schematic diagram showing the directional deformation of the inner shell under pressure as the displacement of the tie rod further increases in this invention;

[0016] Figure 7 This is a schematic diagram showing the reversing pressure generated by each second hydraulic chamber on the inner shell in this invention;

[0017] Figure 8 This is a schematic diagram showing the arc-shaped plug retracting and tightening when the pull rod moves in the reverse direction after reaching its maximum displacement in this invention;

[0018] In the diagram: 1-Outer shell; 2-Piston; 3-Arc-shaped partition; 4-First hydraulic chamber; 5-Second hydraulic chamber; 6-Connecting pipe; 7-Hydraulic valve; 8-Inner telescopic sleeve; 9-Outer telescopic sleeve; 10-Spring; 11-Through hole; 12-Arc-shaped plug; 13-Inner shell; 14-Pull rod; 15-Fixing rod; 16-Friction energy dissipation plate;

[0019] The following will describe in detail, with reference to the accompanying drawings, embodiments of the present invention. Detailed Implementation

[0020] The present invention will be further described below with reference to embodiments:

[0021] like Figures 1-3 As shown, a hydraulic friction damper includes a cylindrical outer shell 1. Several pairs of cavities are evenly distributed around the inner wall of the outer shell 1. A piston 2 is slidably disposed between each pair of cavities, and the two ends of the piston 2 are respectively inserted into the corresponding cavities. An arc-shaped partition 3 is provided in the cavity and is divided into a first hydraulic cavity 4 and a second hydraulic cavity 5 by the arc-shaped partition 3. Several connecting pipes 6 are provided on the outer wall of the outer shell 1 for connecting the first hydraulic cavity 4 and the second hydraulic cavity 5. Hydraulic valves 7 are provided on the connecting pipes 6.

[0022] Piston 2 is connected to inner telescopic sleeves 8 at both ends. An outer telescopic sleeve 9 is slidably sleeved on the outside of the inner telescopic sleeve 8. A spring 10 is connected between the inner telescopic sleeve 8 and the outer telescopic sleeve 9. A through hole 11 is provided in the center of the arc-shaped partition 3. After the outer telescopic sleeve 9 passes through the through hole 11, it is connected to an arc-shaped plug 12 that matches the arc-shaped partition 3.

[0023] The outer shell 1 has inner shells 13 that slide along the cavity at both ends. A pull rod 14 is provided at the axis of the inner shell 13. A fixed rod 15 is connected between the piston 2 and the pull rod 14. A friction energy dissipation plate 16 is inserted between the pull rod 14 and the opposite surface of the inner shell 13.

[0024] The thickness of the inner shell 13 is less than that of the outer shell 1; the inner shell 13 is made of aluminum to ensure that it will not be damaged under the condition of deformation, and the outer shell 1 is made of high-strength steel; the friction energy dissipation plate 16 is made of high-damping rubber.

[0025] The present invention uses piston 2 to move in the first hydraulic chamber 4, and uses arc-shaped plug 12, spring 10, inner telescopic sleeve 8 and outer telescopic sleeve 9 to control the flow direction of hydraulic oil in the first hydraulic chamber 4, so that hydraulic oil flows in the second hydraulic chamber 5, thereby increasing the pressure in the second hydraulic chamber 5. The circumferential pressure increases the frictional resistance between the friction energy dissipation plates 16, and energy is dissipated through the relative deformation between the friction energy dissipation plates 16.

[0026] This invention dissipates energy by converting the relative displacement of the tie rod 14 into frictional force on the friction energy-dissipating plate 16. Compared with traditional friction dampers, it has a stronger energy dissipation capacity. The frictional force can increase with the increase of the relative displacement of the tie rod 14, and the pressure can also be reset by adjusting the hydraulic valve 7. Using this damper as a vibration reduction component in building structures can effectively solve the problem of not being able to simultaneously handle strong and weak vibrations.

[0027] Working principle of this invention:

[0028] like Figure 4As shown, when the pull rod 14 is displaced, it causes the piston 2 to be displaced in the first hydraulic chamber 4. The spring 10 is in a contracted state, the pressure difference between the first hydraulic chamber 4 and the second hydraulic chamber 5 is relatively small, and the arc-shaped plug 12 has not yet opened. At this time, the friction between the friction energy dissipation plates 16 is relatively small.

[0029] like Figure 5 As shown, as the displacement of the pull rod 14 increases, the displacement of the piston 2 increases. At this time, the pressure in the first hydraulic chamber 4 is much greater than the pressure in the second hydraulic chamber 5. The arc-shaped plug 12 opens, and the hydraulic oil flows from the first hydraulic chamber 4 to the second hydraulic chamber 5.

[0030] like Figure 6 , Figure 7 As shown, as the displacement of the pull rod 14 and the piston 2 further increases, the pressure in the second hydraulic chamber 5 generates circumferential pressure on the inner cavity shell 13, causing the inner cavity shell 13 to undergo circumferential deformation, which causes the friction energy dissipation plates 16 to squeeze against each other, increasing the friction force between the friction energy dissipation plates 16.

[0031] like Figure 8 As shown, when the pressure difference between the first hydraulic chamber 4 and the second hydraulic chamber 5 is not large, the arc-shaped plug 12 is tightened again under the action of the spring 10. When the pull rod 14 reaches its maximum displacement and begins to move in the opposite direction, the pressure in the second hydraulic chamber 5 is much greater than that in the first hydraulic chamber 4. The arc-shaped plug 12 is further tightened under the pressure in the second hydraulic chamber 5. At this time, the inner cavity shell 13 is subjected to circumferential pressure, which makes the friction energy dissipation plate 16 fully exert its damping effect.

[0032] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] The present invention has been described above by way of example. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made by adopting the inventive concept and technical solution of the present invention, or direct application to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A hydraulic friction damper, characterized in that, The device includes a cylindrical outer shell (1), with several pairs of cavities evenly distributed around the inner walls of the outer shell (1). A piston (2) is slidably disposed between each pair of cavities, and the two ends of the piston (2) are respectively inserted into the corresponding cavities. An arc-shaped partition (3) is provided in the cavity, and the cavity is divided into a first hydraulic cavity (4) and a second hydraulic cavity (5) by the arc-shaped partition (3). Several connecting pipes (6) are provided on the outer wall of the outer shell (1) to connect the first hydraulic cavity (4) and the second hydraulic cavity (5). A hydraulic valve (7) is provided on the connecting pipe (6). An inner telescopic sleeve (8) is connected to both ends of the piston (2). An outer telescopic sleeve (9) is slidably disposed on the outside of the inner telescopic sleeve (8). A spring (10) is connected between the inner telescopic sleeve (8) and the outer telescopic sleeve (9). The arc-shaped partition (3) A through hole (11) is provided in the center. After the outer telescopic sleeve (9) passes through the through hole (11), it is connected to an arc-shaped plug (12) that matches the arc-shaped partition (3). The inner cavity shell (1) is provided with inner cavity shells (13) that slide along the cavity at both ends. A pull rod (14) is provided at the axis of the inner cavity shell (13). A fixed rod (15) is connected between the piston (2) and the pull rod (14). A friction energy dissipation plate (16) is inserted between the pull rod (14) and the inner cavity shell (13). As the displacement of the pull rod (14) and the piston (2) increases, the pressure in the second hydraulic chamber (5) generates circumferential pressure on the inner cavity shell (13), causing the inner cavity shell (13) to undergo circumferential deformation, which causes the friction energy dissipation plates (16) to squeeze each other, and the friction force between the friction energy dissipation plates (16) increases.

2. A hydraulic friction damper according to claim 1, characterized in that, The thickness of the inner shell (13) is less than the thickness of the outer shell (1).

3. A hydraulic friction damper according to claim 2, characterized in that, The inner shell (13) is made of aluminum, and the outer shell (1) is made of high-strength steel.

4. A hydraulic friction damper according to claim 3, characterized in that, The friction energy dissipation plate (16) is made of high-damping rubber.

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