CN202867682U - Bidirectional elastic damper based on polymer material - Google Patents

Abstract

A two-way elastic damper based on polymer materials, including a piston-cylinder assembly, which includes a piston rod (3) and a cylinder (4) with a rear cover (5), the piston rod passes through the bottom of the cylinder and the front cover (9 ) into the cylinder damping cavity (6), the front end of the piston rod is the piston (7), the rear rod end of the piston rod is provided with a joint bearing, the rear cover is provided with a connecting hinge rod, and the rod end of the connecting rod is also provided with There are joint bearings, the front chamber and the rear chamber of the piston in the cylinder of the piston-cylinder assembly are filled with polymer damping materials, and the outer body of the cylinder is provided with a heat dissipation structure, which is a plurality of annular convex corrugations. The utility model can improve the safety and reliability of the power transmission tower under natural disaster environments such as typhoons and earthquakes, and provides a strong guarantee for the safe and stable operation of the power grid under harsh environments.

Description

A Two-way Elastic Damper Based on Polymer Material

technical field

The utility model relates to a damper, in particular to a two-way elastic damper based on very high viscosity and strong compressibility polymer material. the

Background technique

At present, the fluid damper is based on the principle of pore flow, and by adjusting the size of the pores with variable cross-section, thereby adjusting the value range of the damping coefficient, it has a better effect of vibration reduction and energy consumption. Moreover, in recent years, the emergence of smart materials represented by magnetorheological fluids has injected new vitality into the development of damping technology. It combines yield fluid damping technology with active control strategies and has gradually played a role in various vibration reduction fields. However, most of the magnetorheological fluid damping devices currently on the market require power control, and often require a stable low-voltage DC power supply. On the other hand, since the destructive effects of disasters such as typhoons and earthquakes are often difficult to predict in advance, and the effective performance of this damper can largely depend on the decision-making and driving of the external control system, it has a very high impact on the entire system. requirements. This makes it difficult to achieve a breakthrough in the application of this damper in transmission towers. the

In the existing fluid-based dampers, the damping effect is obtained by pouring viscous fluid into the casing and utilizing the flow resistance of the viscous fluid, so the viscous fluid becomes a necessary medium. The introduction of viscous fluid makes it necessary to design sealing parts for the entire device to prevent fluid leakage. However, no matter how good the sealing is, it will inevitably cause the fluid attached to the body to leak to the outside. Therefore, it is practically impossible to achieve zero fluid leakage. the

On the other hand, although it is almost impossible for the fluid leakage to reach zero, in order to better meet the practical requirements, the fluid leakage will inevitably approach zero indefinitely, which requires the improvement of the precision of the sealing structure. . However, there is a problem that the higher the precision of the sealing structure, the higher the cost, which greatly limits its wide application. In addition, in order to meet the sealing requirements without improving the sealing accuracy, it is necessary to increase the tightening force of the seal. However, the greater the seal tightening force, the greater the frictional force, hindering the slidability of the damper and adversely affecting the damper. Therefore, the existing dampers based on viscous fluids not only have limited applications, but also cannot avoid the problem of greatly increasing their manufacturing costs. the

In order to remedy the disadvantages of existing dampers based on viscous fluids, gas dampers are known which flush gas into the cylinder. However, if the gas damper also leaks, the damper will hardly achieve the damping effect, and it is more difficult to completely prevent the leakage of gas with extremely small particles than the fluid leakage. Therefore, even if the gas damper has no structural defects, its application environment is greatly limited due to the problem of gas leakage. In addition, the gas damper has a characteristic that the sensitivity is inferior to that of the oil damper due to the strong compressibility of gas or the like. the

To sum up, the status quo of the existing technology is: the fluid-based damper has a long service life and can obtain a large damping force, but its cost is greatly increased due to leakage, which greatly limits the prospect of its wide application ; The gas damper has problems such as short service life and poor sensitivity. the

In addition, the existing fluid-based dampers have poor heat dissipation performance, which will cause the temperature of the fluid to rise and the viscosity to change and the damping force to decrease. the

Utility model content

The technical problem to be solved by the utility model is to provide a two-way elastic damper based on polymer materials applied to power transmission towers, which has good heat dissipation performance and does not require viscous fluid or gas, and can obtain desired damping force. the

To solve the problems of the technologies described above, the solution adopted by the utility model is as follows:

A two-way elastic damper based on polymer materials, including a piston-cylinder assembly, is characterized in that: the piston-cylinder assembly includes a piston rod 3 and a cylinder 4 with a rear cover 5, and the piston rod 3 passes through the bottom of the cylinder The rod hole of the front cover 9 extends into the cylinder damping cavity 6, the front end of the piston rod 3 is a piston 7, the front cover 9 of the cylinder 4 is also provided with a piston rod sheath 2, and the rear rod end of the piston rod 3 is provided with a joint bearing. The back cover 5 is provided with a connecting hinge rod, and the rod end is also provided with a joint bearing. The piston front cavity and the rear cavity in the cylinder barrel of the piston-cylinder assembly are filled with polymer damping materials. the

The outer body of the cylinder is provided with a heat dissipation structure, which is provided with a plurality of ring-shaped corrugations on the outer body of the cylinder. the

The utility model provides a two-way elastic damper based on a polymer material, wherein the polymer material is a polymer elastic damping body material, that is, a fiber-reinforced viscoelastic polymer-based composite material. It consists of a viscoelastic matrix and fiber inclusions with high elastic modulus. Under a certain stress state, it not only has the characteristics of viscous liquid to consume energy, but also has the characteristics of elastic solid material to store energy. When it produces dynamic stress or strain, part of the energy is converted into heat energy and dissipated, while the other part of energy is stored in the form of potential energy, and the purpose of energy consumption and vibration absorption is achieved by converting vibration mechanical energy into other energy. the

The utility model provides a two-way elastic damper based on polymer materials, wherein the polymer material of the elastic damping body has very high viscosity, strong compressibility, good chemical inertness, and anti-aging performance. The damper based on elastic damping body polymer material is obviously superior to the existing damper based on viscous fluid in performance, can effectively reduce the vibration of various frequencies and amplitudes, and can quickly absorb the exciting impact energy, making It can be widely used in various working conditions and can achieve good damping effect. the

The two-way elastic damper based on polymer material provided by the utility model has compressibility and strong viscoelasticity, and the elastic potential energy equivalent to that produced by a high-power spring can be generated within a very small displacement. , so it can play an obvious damping effect on high-amplitude low-frequency vibrations such as wind loads that cannot be solved by ordinary hydraulic dampers and high-frequency low-amplitude vibrations caused by external disturbances. double effect. the

The bidirectional elastic damper based on the polymer material provided by the utility model, in order to give full play to the high viscosity and strong compressibility of the damping material, the overall damper adopts a cylinder structure with simple structure and easy installation. the

The two-way elastic damper based on polymer material provided by the utility model, in order to make the damping chamber and the high-viscosity damping medium instantly generate a huge friction force so that the impact kinetic energy can be quickly converted into heat energy and released quickly, the outer wall of the cylinder in the overall structure is equipped with heat dissipation structure. the

The utility model provides a two-way elastic damper based on polymer materials. In order to ensure that the piston rod used to enter and exit the damping chamber is not corroded when the damper works in a harsh environment, a piston rod guard is provided outside the cylinder structure. The sleeve structure is connected with the cylinder by countersunk screws. the

The utility model provides a two-way elastic damper based on polymer materials. In order to ensure the convenience of on-site installation of the damper, rod-end joint bearings are provided at both ends of the damper to compensate for small installation errors in the on-site installation process. Provides guarantee conditions for the device to work under better working conditions. the

Beneficial effects of the utility model: the bidirectional elastic damper based on polymer materials provided by the utility model has the following characteristics: (1) The energy absorption ratio is large, the efficiency is high, and the effect of high-efficiency vibration reduction and energy consumption can be obtained within a very small displacement; (2) The speed response range is wide, and the dynamic response time is short; (3) The anti-aging ability is strong, so that it can be used in the natural environment where the transmission tower is located for a long time; (4) For exciting energy mutation and low amplitude high frequency Both high-amplitude and low-frequency vibration can be effectively controlled, effectively reducing the gap change of key joints caused by ordinary vibration; (5) The huge molecular weight and extremely high molecular viscosity make the seal more reliable than ordinary hydraulic oil and less likely to leak. (6) It does not require the decision-making and driving of the external control system, so that it can adapt to the random natural disasters suffered by the transmission tower. the

Description of drawings

Figure 1 is a schematic diagram of the basic structure of a two-way elastic damper based on polymer materials;

Fig. 2 is an enlarged view of part A of Fig. 1 . the

In the figure: 1 is the rod end joint bearing 2 is the piston rod sheath 3 is the piston rod 4 is the cylinder with heat sink 5 is the cylinder back cover 6 is the damping chamber 7 is the piston 8 is the polymer damping material 9 is the cylinder The front cover. the

Detailed ways

As shown in Figure 1, the two-way elastic damper based on polymer materials provided by the utility model includes a piston-cylinder assembly, which specifically includes a piston rod 3 and a cylinder barrel 4 with a rear cover 5, and the piston rod 3 passes through The rod hole of the front cover 9 at the bottom of the cylinder extends into the cylinder damping chamber 6, the front end of the piston rod 3 is a piston 7, and the front cover 9 of the cylinder 4 is also provided with a piston rod sheath 2, and a countersunk screw is used to connect with the cylinder. The rear rod end of the piston rod 3 is provided with a joint bearing, the rear cover 5 is provided with a connecting hinge rod, and the rod end is also provided with a joint bearing. The piston front cavity and rear cavity in the cylinder of the piston cylinder assembly are filled with polymer damping The outer body of the cylinder is provided with a heat dissipation structure, and the outer body of the cylinder is provided with a plurality of ring-shaped corrugations. the

Claims (2)

1. bidirectional elastic damper based on macromolecular material, comprise piston cylinder assembly, it is characterized in that: described piston cylinder assembly comprises piston rod (3) and with the cylinder barrel (4) of bonnet (5), the bar hole that piston rod passes cylinder barrel bottom protecgulum (9) puts in cylinder barrel damping cavity (6), the front end of piston rod is piston (7), rod end is provided with joint shaft bearing behind the piston rod, bonnet is provided with the connection toggle, connect the toggle rod end and also be provided with joint shaft bearing, piston ante-chamber and back cavity in the cylinder barrel of described piston cylinder assembly are full of polymer damping material.

2. the bidirectional elastic damper based on macromolecular material according to claim 1 is characterized in that: it is protruding stupefied that the outer body of described cylinder barrel is provided with many ring-types.

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