Viscous damper with friction energy dissipation function

Abstract

The utility model discloses a viscous damper with a friction energy dissipation function, which belongs to the field of shock absorption of building and bridge structures and comprises an oil cylinder, one end of the oil cylinder is in threaded connection with a base, the other end of the oil cylinder is in threaded connection with a connecting pipe, and a piston rod is arranged on one face, facing the oil cylinder, of the base. A first piston is arranged on the piston rod outside the oil cylinder; a second piston is arranged at one end of the piston rod inside the connecting pipe; according to the viscous damper with the friction energy dissipation function, a novel friction material-ceramic fiber material is adopted, the material is resistant to high temperature and low temperature, stable in physical and chemical performance and high in durability, the friction coefficient is not reduced under reciprocating friction, a novel sealing material-polytetrafluoroethylene is adopted, the material is resistant to high temperature and low temperature, stable in physical and chemical performance, high in durability and low in friction coefficient, and the sealing performance is good. Under reciprocating friction of the piston rod, the sealing performance is not reduced, and the service life of the product is long and can be the same as that of a building structure.

Description

Technical Field

[0001] This utility model belongs to the field of vibration reduction of building and bridge structures, and specifically relates to a viscous damper that also has friction energy dissipation. Background Technology

[0002] Conventional viscous dampers consist of a cylinder, piston, piston rod, damping medium, and seals. The energy dissipation mechanism when installed in buildings or bridges is as follows: when external displacement or velocity is input, the piston moves in the damping medium, thereby converting mechanical energy into heat energy for storage or consumption, thus reducing the seismic response of buildings or bridges. Essentially, it is the consumption or conversion of energy. Conventional dampers utilize the movement of the piston in the damping medium to achieve energy storage or consumption. The energy dissipation principle is simple, and its energy dissipation relies entirely on the damping medium.

[0003] However, the common damping medium is flowing silicone oil. If the sealing system is unreliable and the damping medium leaks, the conventional viscous damper will completely lose its energy dissipation function and its performance parameters will be zero. General rubber seals have a design service life and it is difficult for them to match the lifespan of the structure. Therefore, this utility model provides a viscous damper that also has friction energy dissipation. Utility Model Content

[0004] The purpose of this invention is to provide a viscous damper that also has frictional energy dissipation properties, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a viscous damper with frictional energy dissipation, comprising a hydraulic cylinder, one end of which is threadedly connected to a base, and the other end of which is threadedly connected to a connecting pipe. A piston rod is provided on the side of the base facing the hydraulic cylinder, a first piston is provided on the piston rod outside the hydraulic cylinder, and a second piston is provided on the end of the piston rod inside the connecting pipe.

[0006] In a preferred embodiment, a sealing ring is provided on the contact surface between the base and the connecting pipe and the oil cylinder, and the sealing ring is made of polytetrafluoroethylene.

[0007] In a preferred embodiment, the cylinder is provided with a damping medium inside.

[0008] In a preferred embodiment, the inner wall of the connecting pipe is provided with a friction layer, and the friction layer is made of ceramic fiber.

[0009] In a preferred embodiment, the connecting pipe is provided with three equally spaced bolts on its outer circumference, with one end of each bolt penetrating and extending into the interior of the second piston.

[0010] In a preferred embodiment, each bolt is fitted with a grooved hole and a concave washer.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This viscous damper, which also incorporates friction energy dissipation, utilizes a novel friction material—ceramic fiber. This material is resistant to high and low temperatures, exhibits stable physical and chemical properties, and boasts high durability, maintaining its coefficient of friction even under reciprocating friction. It also employs a novel sealing material—polytetrafluoroethylene (PTFE). This material is resistant to high and low temperatures, exhibits stable physical and chemical properties, and boasts high durability and a low coefficient of friction. Furthermore, it incorporates an energy storage spring, ensuring that the sealing performance does not decrease under the reciprocating friction of the piston rod. This results in a long product lifespan, comparable to that of the building structure.

[0013] This viscous damper, which also incorporates friction energy dissipation, can achieve viscous damping force while simultaneously providing friction energy dissipation function, thanks to the addition of friction elements. This results in stronger energy dissipation performance and enhanced vibration reduction when installed in buildings and bridges. Attached Figure Description

[0014] Figure 1 This is an internal schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the structure of this utility model.

[0016] In the diagram: 1. Hydraulic cylinder; 101. Damping medium; 2. Piston rod; 3. First piston; 4. Second piston; 5. Connecting pipe; 6. Sealing ring; 7. Groove hole with concave gasket; 8. Friction layer. Detailed Implementation

[0017] The present invention will be further described below with reference to the embodiments.

[0018] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0019] Please see Figure 1-2This utility model provides a viscous damper with frictional energy dissipation, including a hydraulic cylinder 1. One end of the hydraulic cylinder 1 is threadedly connected to a base, and the other end of the hydraulic cylinder 1 is threadedly connected to a connecting pipe 5. Sealing rings 6 are provided on the contact surfaces of the base, the connecting pipe 5, and the hydraulic cylinder 1. The sealing rings 6 are made of polytetrafluoroethylene. First, the sealing rings 6 are installed on the contact surfaces of the base, the connecting pipe 5, and the hydraulic cylinder 1. The sealing rings 6 are made of polytetrafluoroethylene, which has the characteristics of high temperature and low temperature resistance, stable physical and chemical properties, strong durability, and low coefficient of friction. Then, the base is connected to one end of the hydraulic cylinder 1 by a threaded connection, and the connecting pipe 5 is connected to the other end of the hydraulic cylinder 1 by a threaded connection, forming a complete viscous damper structure.

[0020] The sealing ring 6, made of polytetrafluoroethylene, is resistant to high and low temperatures, has stable physical and chemical properties, strong durability, and a low coefficient of friction. Under the reciprocating friction of the piston rod 2, the sealing performance is not reduced, which can effectively prevent the leakage of the damping medium 101 in the oil cylinder 1, ensure the normal operation of the damper, extend the service life of the product, and enable it to have the same service life as the building structure.

[0021] In this embodiment, a piston rod 2 is provided on the side of the base facing the cylinder 1. A first piston 3 is provided on the outside of the cylinder 1, and a second piston 4 is provided at the end of the piston rod 2 inside the connecting pipe 5. A damping medium 101 is provided inside the cylinder 1. A friction layer 8 is provided on the inner wall of the connecting pipe 5. The friction layer 8 is made of ceramic fiber. Three equally spaced bolts are provided in a ring around the outside of the connecting pipe 5, and one end of the bolts penetrates and extends into the inside of the second piston 4. Each bolt has a grooved hole with a concave washer 7 on its outer sleeve. All components of the viscous damper are installed in place, and the base is connected to the cylinder 1 and the connecting pipe 5. The threaded connection and sealing ring 6 ensure a seal at the connection. One end of the piston rod 2 is connected to the base, and the other end extends into the connecting pipe 5. The first piston 3 is located on the piston rod 2 outside the cylinder 1, and the second piston 4 is located on the piston rod 2 inside the connecting pipe 5. The cylinder 1 is filled with damping medium 101. The ceramic fiber friction layer 8 on the inner wall of the connecting pipe 5 is ready. Three equally spaced bolts pass through the connecting pipe 5 and extend into the second piston 4. Each bolt is fitted with a grooved hole and a concave gasket 7. When the building or bridge structure is subjected to external displacement or velocity input, such as seismic wave impact or wind force, the damper starts to work. The piston rod 2 will reciprocate under the action of external force. The first piston 3 moves with the piston rod 2 in the oil cylinder 1. Since there is a damping medium 101 in the oil cylinder 1, the movement of the first piston 3 will be resisted by the damping medium 101, converting mechanical energy into heat energy, realizing viscous damping energy dissipation. At the same time, the second piston 4 moves with the piston rod 2 in the connecting pipe 5 and generates friction with the ceramic fiber friction layer 8 on the inner wall of the connecting pipe 5, converting part of the mechanical energy into heat energy through friction, realizing friction energy dissipation. The three equally spaced bolts play a certain guiding and stabilizing role in the movement of the second piston 4, ensuring that the second piston 4 moves smoothly in the connecting pipe 5. The slotted hole with the concave gasket 7 can buffer the force between the bolt and the second piston 4, reduce the impact and wear caused by the movement, and also help to adjust the fit clearance between the bolt and the second piston 4, ensuring smooth movement.

[0022] By combining viscous damping and frictional energy dissipation, the energy dissipation capacity of the damper is greatly improved. When faced with strong external forces, it can more effectively convert mechanical energy into heat energy, reduce the dynamic response of building or bridge structures, and enhance the structure's seismic and wind resistance. The three equidistant bolts provide good guidance and stability for the movement of the second piston 4, reducing offset and sway during piston movement and improving the overall structural stability of the damper. The grooved hole with concave gasket 7 effectively buffers the force between the bolt and the second piston 4, reduces component wear, extends component service life, and further ensures the long-term stability of the damper structure. The ceramic fiber friction layer 8 has advantages such as high and low temperature resistance, stable physical and chemical properties, high durability, and no decrease in friction coefficient under reciprocating friction, ensuring the long-term reliability of the frictional energy dissipation function.

[0023] The working principle and usage process of this utility model are as follows: First, the sealing ring 6 is installed on the contact surface between the base, the connecting pipe 5, and the oil cylinder 1. The sealing ring 6 is made of polytetrafluoroethylene, which has the characteristics of high temperature and low temperature resistance, stable physical and chemical properties, strong durability, and low coefficient of friction. Then, the base is connected to one end of the oil cylinder 1 by a threaded connection, and the connecting pipe 5 is connected to the other end of the oil cylinder 1 by a threaded connection, forming a complete viscous damper structure. When the building or bridge structure is subjected to external displacement or velocity input, such as seismic wave impact or wind action, the damper starts to work. The piston rod 2 will reciprocate under the action of external force. The first piston 3 moves with the piston rod 2 in the oil cylinder 1. Since there is a damping medium 101 in the oil cylinder 1, the movement of the first piston 3 will be resisted by the damping medium 101, converting mechanical energy into heat energy, realizing viscous damping energy dissipation. At the same time, the second piston 4 moves with the piston rod 2 in the connecting pipe 5, generating friction with the ceramic fiber friction layer 8 on the inner wall of the connecting pipe 5, converting part of the mechanical energy into heat energy through friction, realizing friction energy dissipation. The three equally spaced bolts play a certain guiding and stabilizing role in the movement of the second piston 4, ensuring that the second piston 4 moves smoothly in the connecting pipe 5. The slotted hole with the concave gasket 7 can buffer the force between the bolt and the second piston 4, reduce the impact and wear caused by the movement, and also help to adjust the fit clearance between the bolt and the second piston 4, ensuring smooth movement.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A viscous damper that also dissipates frictional energy, comprising a hydraulic cylinder (1), characterized in that: One end of the oil cylinder (1) is threaded to a base, and the other end of the oil cylinder (1) is threaded to a connecting pipe (5). A piston rod (2) is provided on the side of the base facing the oil cylinder (1). A first piston (3) is provided on the outside of the oil cylinder (1), and a second piston (4) is provided on the end of the piston rod (2) inside the connecting pipe (5).

2. A viscous damper with frictional energy dissipation as described in claim 1, characterized in that: The base is provided with sealing rings (6) on the contact surfaces of the connecting pipe (5) and the oil cylinder (1), and the sealing rings (6) are made of polytetrafluoroethylene.

3. A viscous damper with frictional energy dissipation as described in claim 1, characterized in that: The cylinder (1) is equipped with a damping medium (101).

4. A viscous damper with frictional energy dissipation as described in claim 1, characterized in that: The inner wall of the connecting pipe (5) is provided with a friction layer (8), and the friction layer (8) is made of ceramic fiber.

5. A viscous damper with frictional energy dissipation as described in claim 1, characterized in that: The connecting pipe (5) has three equally spaced bolts on its outer ring, and one end of each bolt passes through and extends into the interior of the second piston (4).

6. A viscous damper with frictional energy dissipation as described in claim 5, characterized in that: Each bolt is fitted with a grooved hole and a concave washer (7) on the outside.

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