CN102359532B - Online adjustable damping viscous damper - Google Patents

Abstract

The invention relates to an online variable damping viscous damper, which includes a cylinder, a piston, a piston rod, a damping cavity and a ball joint seat. The damping cavity is arranged in the cylinder and filled with a damping medium. The piston is located in the damping chamber, the piston can slide along the damping chamber, one end of the piston rod is connected to the piston, and the other end extends out of the cylinder and is connected to the ball hinge seat; the cylinder One end of the outer surface of the cylinder is provided with a first valve seat, and an integrated valve connected with the damping chamber is connected to the first valve seat, and an external pipeline is provided between the integrated valve and the other end of the cylinder, and the external pipeline The road connects the integrated valve and the damping cavity, and the damping size of the damper can be adjusted by adjusting the integrated valve. Compared with the prior art, the invention has the advantages of real-time control, stepless adjustment of damping and the like.

Description

An online variable damping viscous damper

technical field

The invention relates to the field of vibration reduction and anti-seismic, in particular to an online variable damping viscous damper.

Background technique

In the late 1980s, a new design method and concept based on "structural performance" was born in the international earthquake engineering field. The structural protection system born at the same time as the structural performance design can further illustrate the importance of this design concept. As the most important product of structural protection system, viscous damper has been widely used and developed by engineering circles all over the world.

In the late 1990s, my country also began to apply structural protection systems in the fields of buildings and bridges. The Shanghai Institute of Materials has started mass production of viscous dampers since 1999, and the viscous dampers produced have been widely recognized by the international earthquake engineering community.

Viscous dampers are mainly used to consume the huge destructive energy brought by dynamic loads such as earthquakes, sunlight temperature changes, and strong winds on bridges or building structures, to protect the structure from damage, and to convert huge mechanical energy into internal energy for consumption.

In recent years, natural disasters such as high-intensity earthquakes and high-level typhoons have occurred frequently, and their intensity has greatly exceeded the existing historical records, often causing huge damage. For some super-large bridges and super high-rise buildings, calculations using historical records during design have been unable to cope with sudden severe natural disasters. The structural use of conventional viscous dampers also presents new challenges.

The online variable damping viscous damper has an online device that can be controlled in real time, and the damping of the viscous damper can be adjusted steplessly. Self-damping, helping building bridges consume more energy.

Contents of the invention

The object of the present invention is to provide an online variable damping viscous damper with real-time control and stepless adjustment of damping in order to overcome the above-mentioned defects in the prior art.

The purpose of the present invention can be achieved through the following technical solutions: an online variable damping viscous damper, including a cylinder, a piston, a piston rod, a damping cavity and a ball joint seat, the damping cavity is located in the cylinder Inside, it is filled with damping medium, the piston is set in the damping cavity, the piston can slide along the damping cavity, one end of the piston rod is connected with the piston, and the other end extends out of the cylinder, and connects with the ball hinge seat connection; it is characterized in that a first valve seat is provided on one end of the outer surface of the cylinder body, and an integrated valve connected with the damping cavity is connected to the first valve seat, and the integrated valve and the cylinder body An external pipeline is provided between the other ends, and the external pipeline communicates with the integrated valve and the damping cavity, and the damping size of the damper can be adjusted by adjusting the integrated valve.

The other end of the outer surface of the cylinder body is also provided with a second valve seat, the second valve seat is connected with a damping medium filling valve communicating with the damping cavity, and the external pipeline is connected with the damping medium filling valve.

The integrated valve includes a pipeline total flow control valve, an online controllable flow control valve and a mechanical flow control valve.

The pipeline total flow control valve includes a spool and a locking screw. The spool has a fan-shaped fixed block with grooves. Rotate the spool to a predetermined position and lock it with the locking screw to set the pipeline. The opening of the total flow control valve.

The online controllable flow control valve includes a valve core, a coupling and a motor, and the motor drives the valve core to rotate through the coupling.

The end of the valve core of the mechanical flow control valve is embedded with a driving rod, and one end of the driving rod is provided with a rolling bearing.

Both the integrated valve and the damping medium filling valve are connected to the cylinder body through a plane flange, and a seal is provided between the plane flange and the cylinder body.

The integrated valve is connected to the external pipeline through a flat flange, and a seal is provided at the connection between the integrated valve and the external pipeline, and the damping medium filling valve is connected to the external pipeline through a flat flange , and a seal is provided at the connection between the damping medium filling valve and the external pipeline.

Compared with the prior art, the online variable damping viscous damper of the present invention is an online device capable of real-time control, which can steplessly adjust the damping of the viscous damper, which can not only meet the requirements of general working conditions, It can also change its own damping when encountering sudden and severe natural disasters, helping build bridges to consume more energy.

Description of drawings

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

FIG. 2 is a schematic top view of the structure of FIG. 1 .

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example

As shown in Figure 1 and Figure 2, the online variable damping viscous damper of the present invention is developed on the basis of the viscous damper, and its body is a viscous damper. By providing the viscous damper with an external pipeline and a control device, the control device changes the flow of the external pipeline through the pipeline total flow control valve, the online controllable flow control valve and the mechanical flow control valve to realize the variable damping function. The control device referred to is the integrated valve. The pipeline total flow control valve controls the total flow of the entire external pipeline. When it is closed, it sets the maximum rated load of the viscous damper, and when it is opened, it is the minimum rated load (not equal to zero). The online controllable flow control valve is equipped with a motor and a remote control terminal, which can control the flow of the external pipeline from zero to maximum, and realize the stepless change of damping by using the rotation angle of the motor, and adjust the damping force between the minimum rated load and the maximum rated load. any state in between. The mechanical flow control valve is driven by a mechanical push rod or manually controlled by a proprietary wrench. It can only realize the control of the pipeline state on and off, and the damper can only be set at the maximum rated load or the minimum rated load.

As shown in the drawings: an online variable damping viscous damper, including a cylinder 3, a piston 2, a piston rod 4, a damping cavity 1 and a ball joint seat, the ball joint seat of the present invention includes a left ball joint seat 5 And right ball hinge seat 6. The damping chamber 1 is set in the cylinder body 3, which is filled with damping medium. The piston 2 is set in the damping chamber 1. The piston 2 can slide along the damping chamber 1. One end of the piston rod 4 is connected with the piston 2, and the other end Stretch out of the cylinder body 3, and connect with the left ball joint seat 5 and the right ball joint seat 6. One end of the outer surface of the cylinder body 3 is provided with a first valve seat, the first valve seat is connected with an integrated valve 7 communicating with the damping cavity 1, and an external pipeline is arranged between the integrated valve 7 and the other end of the cylinder body 3 8. The external pipeline 8 communicates with the integrated valve 7 and the damping cavity 1, and the damping size of the damper can be adjusted by adjusting the integrated valve 7.

As a preference, the other end of the outer surface of the cylinder 3 of the present invention is also provided with a second valve seat, which is connected with a damping medium filling valve 9 communicating with the damping chamber 1, and the external pipeline 8 is connected to the damping medium Fill valve 9 is connected. The external pipeline connects the two parts of the damping chamber separated by the piston, and an integrated valve 7 is arranged in the external pipeline. The design flow rate of the external pipeline should be able to meet the flow rate when the damper works at the highest speed. Because the size of the external pipeline is much smaller than that of the damping cavity, a valve for filling the damping medium is installed in the external pipeline, and it is also used to discharge the air inside the pipeline. Both valves are fixed to the valve seat with hexagon socket head cap screws, and welded around the bottom to prevent leakage. The two ends of the external pipeline are respectively connected with the above two valves with flat flanges and seals, and fixed with hexagon socket screws.

When the external pipeline is closed and the damper is working, the left ball joint seat 5 drives the piston rod 4 to move relative to the right ball joint seat 6, and the damping medium flows from one side of the piston 2 to the other side cavity in the cylinder body 3, and the damping medium Produce friction, throttling and damping effects with the piston structure. Therefore, the work done by the external force on the damper is converted into the internal energy of the damping medium, and the work done by the external force is consumed to protect the building bridge structure from damage. When the external pipeline is opened and the damper is working, the damping effect between the damping medium and the piston is reduced to zero, and the damping medium passes through the external pipeline and each flow control valve in the control device to produce a damping effect.

The integrated valve 7 includes a pipeline total flow control valve 72 , an online controllable flow control valve 71 and a mechanical flow control valve 73 . The pipeline total flow control valve, the online controllable flow control valve, and the mechanical flow control valve are all threaded and connected to the valve body of the integrated valve 7 .

The pipeline total flow control valve includes a spool and a locking screw. The spool has a fan-shaped fixed block with grooves. Rotate the spool to a predetermined position and lock it with the locking screw to set the opening of the pipeline total flow control valve. . The pipeline total flow control valve controls the total flow of the entire external pipeline. When it is closed, it sets the maximum rated load of the viscous damper, and when it is opened, it is the minimum rated load (not equal to zero). For the pipeline total flow control valve, the valve opening has been set when the damper test is completed, and the spool has a fan-shaped slotted fixed block, which is locked with screws.

The online controllable flow control valve includes a valve core, a coupling and a motor, and the motor drives the valve core to rotate through the coupling. The online controllable flow control valve is equipped with a motor and a remote control terminal, which can control the flow of the external pipeline from zero to maximum, and realize the stepless change of damping by using the rotation angle of the motor, and adjust the damping force between the minimum rated load and the maximum rated load. any state in between.

The end of the valve core of the mechanical flow control valve is embedded with a driving rod, and one end of the driving rod is provided with a rolling bearing, and a mechanical push rod 74 is arranged between the rolling bearing and the ball valve seat. The mechanical flow control valve is driven by a mechanical push rod or manually controlled by a proprietary wrench. It can only realize the control of the pipeline state on and off, and the damper can only be set at the maximum rated load or the minimum rated load. One end of the mechanical push rod is threadedly connected to the left ball hinge seat through a connecting rod, and the other end is fixed through a guide device, and can only reciprocate in the axial direction.

When working, the left ball hinge seat drives the piston rod to reciprocate in the damping cylinder, and the whole plays the role of a conventional viscous damper.

When one of the online controllable flow control valve and the mechanical flow control valve is closed, the entire external pipeline is completely closed, and the entire viscous damper is set to the maximum rated damping force working state to cope with sudden and extremely severe natural conditions. Protect structures from damage during disaster situations.

When the online controllable flow control valve and the mechanical flow control valve are all open, the entire external pipeline is fully opened, and the total flow control valve of the pipeline with a specific valve opening is set in advance, at this time the viscous damper is at the minimum rated damping force Working state, in order to cope with the small load conditions such as temperature changes of the structure. When the opening of the total flow control valve of the pipeline is set to the maximum in advance, the viscous damper can be in a zero damping state to facilitate factory assembly and disassembly.

When the mechanical flow control valve is opened, the opening size of the online controllable flow control valve can be controlled by remotely controlling the motor rotation angle, so that the viscous damper can be in any damping force state between the minimum and maximum rated damping force, which is used to deal with conventional scale natural Disaster and other load conditions.

Regardless of the state of each valve, the size of the opening of each valve. The entire damper functions in the same way as a conventional viscous damper. The difference is that the damping force of the conventional damper cannot be changed once it is set, and the variable damping damper can set different rated damping forces at any time according to different situations.

This type of damper has three control methods: remote control, mechanical device push rod control, and manual control. Various control methods can be reset manually.

Claims (3)

1. An online variable damping viscous damper, comprising a cylinder body, a piston, a piston rod, a damping chamber and a ball joint seat, the damping chamber is located in the cylinder body, filled with a damping medium, the The piston is arranged in the damping cavity, and the piston can slide along the damping cavity. One end of the piston rod is connected with the piston, and the other end extends out of the cylinder and is connected with the ball hinge seat; it is characterized in that the One end of the outer surface of the cylinder is provided with a first valve seat, the first valve seat is connected with an integrated valve communicated with the damping cavity, and an external pipeline is provided between the integrated valve and the other end of the cylinder, The external pipeline communicates with the integrated valve and the damping cavity, and the damping size of the damper can be adjusted by adjusting the integrated valve; The integrated valve includes a pipeline total flow control valve, an online controllable flow control valve and a mechanical flow control valve; the pipeline total flow control valve includes a valve core and a locking screw, and the valve core has a sector Fixed block with groove, rotate the spool to a predetermined position, and lock it with the locking screw to set the opening of the total flow control valve of the pipeline; the online controllable flow control valve includes a spool, a coupling and a motor , the motor drives the valve core to rotate through the coupling; the end of the valve core of the mechanical flow control valve is embedded with a lever, one end of the lever is provided with a rolling bearing, and a mechanical push rod is provided between the rolling bearing and the ball valve seat, Push the lever through the mechanical push rod to drive the valve core to open and close; The other end of the outer surface of the cylinder body is also provided with a second valve seat, the second valve seat is connected with a damping medium filling valve communicating with the damping cavity, and the external pipeline is connected with the damping medium filling valve. 2. An online variable damping viscous damper according to claim 1, characterized in that, both the integrated valve and the damping medium filling valve are connected to the cylinder body through a plane flange, and the plane flange and the cylinder There is a seal between the bodies. 3. An online variable damping viscous damper according to claim 1, characterized in that, the integrated valve is connected to the external pipeline through a plane flange, and the integrated valve is connected to the external pipeline A seal is provided at the place, and the damping medium filling valve is connected to the external pipeline through a plane flange, and a sealing is provided at the connection between the damping medium filling valve and the external pipeline.

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