JP4233227B2 - Hydraulic damper for vibration control - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides a hydraulic system for vibration control having a valve unit that is provided in the middle of an oil passage that communicates two hydraulic chambers provided on both sides of a piston, and that incorporates a valve that controls the amount of oil flowing through the oil passage. It relates to dampers.
[0002]
[Prior art]
2. Description of the Related Art As a conventional seismic control hydraulic damper, for example, there is one shown in FIG. In the figure, a piston 14 reciprocating in the axial direction is accommodated in a cylinder 12, and hydraulic chambers 12a and 12b are formed on both sides of the piston 14, and the hydraulic chambers 12a and 12b are operated in both hydraulic chambers 12a and 12b. Filled with oil. The piston 14 is provided approximately at the center of the length of the piston rod 16.
[0003]
One end of a cylinder 12 is connected to one end of a hollow connecting member 18 constituting a long brace, and the other end of the connecting member 18 is connected to a building structure via a ball joint 20. It is connected to one corner. On the other hand, one end of the piston rod 16 opposite to the connecting member 18 with respect to the piston 14 is connected to the other corner of the building structure via the ball joint 20.
[0004]
A valve unit 22 is provided on the side of the cylinder 12, and the valve unit 22 is arranged in parallel in the middle of an oil passage that allows the hydraulic chambers 12a and 12b to communicate with each other. And a relief valve is built-in.
[0005]
Here, the pressure regulating valve is a valve that automatically adjusts the opening degree in order to define the damping coefficient, and the relief valve is the pressure that opens when a pressure greater than a predetermined value considering the safety factor is applied. This is a valve for releasing (reducing) the pressure and protecting the hydraulic system from damage when the pressure rises.
[0006]
When an external force such as an earthquake is applied in the axial direction of the damping hydraulic damper 10 and relative movement occurs between the cylinder 12 and the piston 14, the hydraulic chambers 12a and 12b are directed from one to the other. The hydraulic oil flows through the oil passage and moves through a pressure regulating valve in the middle of the oil passage.
[0007]
At this time, the hydraulic oil receives resistance when passing through the pressure regulating valve, which attenuates the external force such as the earthquake that causes the relative movement between the cylinder 12 and the piston 14, and the vibration of the building due to the external force such as the earthquake. A part of this can be absorbed and the vibration control can be performed.
[0008]
However, in such a conventional damping hydraulic damper 10, since the valve unit 22 is provided on the side of the cylinder 12, the valve unit 22 is arranged in the axial direction of the cylinder 12 because of the configuration of the damping hydraulic damper 10. Therefore, there is a possibility that the construction becomes difficult due to the layout, or the valve unit 22 comes into contact with other members and breaks.
[0009]
As a similar device capable of solving such a problem, for example, there is an attenuation device disclosed in a patent publication related to Japanese Patent No. 2528573. This damping device is provided with a plurality of passages in the piston that pass through the piston and communicates with the hydraulic chambers on both sides thereof, and each of the plurality of passages has a pressure regulating valve that operates on hydraulic oil that flows in opposite directions. A relief valve is provided.
[0010]
[Problems to be solved by the invention]
However, in such a conventional hydraulic damper for vibration control, when it is desired to adjust the pressure regulating valve later, it takes a lot of work to drain hydraulic oil from the hydraulic chamber or disassemble the cylinder or piston. very difficult. When it is desired to use an open / close control valve for electrical control instead of the pressure regulating valve, it is very difficult to provide the open / close control valve in a piston sealed in the cylinder for reasons of wiring and insulation.
[0011]
In view of the above problems, the present invention improves the degree of freedom in layout of the hydraulic damper for vibration control, and not only does the valve unit come into contact with other members and breaks, but also the pressure regulating valve. It is an object of the present invention to provide a hydraulic damper for vibration control that can be adjusted later or that can use a variable opening control valve instead of the pressure regulating valve.
[0012]
[Means for Solving the Problems]
In order to solve the above-described problem, a hydraulic damper for vibration control according to the present invention includes:
A pressure regulating valve that is provided in the middle of an oil passage that communicates with two hydraulic chambers provided on both sides of the piston in the cylinder, and that automatically adjusts the opening to regulate the damping coefficient, and a pressure greater than a predetermined value In a hydraulic damper for vibration control, which has a valve unit that includes a relief valve that opens and protects the hydraulic system from damage when
The valve unit is configured to be installed in a connecting member connected on an extension line of the axis of the cylinder .
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
FIG. 1 is a diagram referred to for explaining an embodiment of the present invention.
The damping hydraulic damper 30 according to the embodiment of the present invention shown in the figure is described by attaching the same reference numerals to the same parts as those of the conventional damping hydraulic damper 10 and the conventional damping control. The description of the same configuration and operation as those of the hydraulic damper 10 will be omitted.
[0014]
In the conventional damping hydraulic damper 10 according to the related art, the valve unit 22 is provided on the side of the cylinder 12, whereas in the damping hydraulic damper 30 in FIG. 1 according to the embodiment of the present invention, The valve unit 22 is different in that it is housed in the connecting member 18.
[0015]
That is, the difference is that the valve unit 22 is disposed at a position separated from the cylinder 12 in the axial direction of the cylinder 12 and is disposed at a position substantially overlapping with the cylinder 12 in a direction perpendicular to the axial direction of the cylinder 12. Yes. In other words, the valve unit 22 is installed on the extension line of the reciprocating motion axis of the piston 14.
[0016]
A pipe 24 (oil path) is connected between the hydraulic chamber 12a in the cylinder 12 and the valve unit 22 in the connecting member 18, and a pipe 25 (oil path) is connected between the hydraulic chamber 12b and the valve unit 22. ) Are connected.
[0017]
The valve unit 22 is provided with an oil passage that communicates between each of the pipes 24 and 25 and the inlet / outlet port of the connecting portion of the valve unit 22, and a pressure regulating valve and a relief valve (not shown) are provided in the middle of the oil passage. Are provided in parallel. Other configurations and operations of the damping hydraulic damper 30 are the same as those of the conventional damping hydraulic damper 10.
[0018]
According to the seismic damping hydraulic damper 30 having such a configuration, since the valve unit 22 is installed on the extension line of the reciprocating motion axis of the piston 14, the dimension in the direction perpendicular to the axial direction of the cylinder 12 can be reduced, so that the space is narrow. However, the seismic damping hydraulic damper 30 can be provided. For this reason, the degree of freedom in layout of the hydraulic damper 30 for vibration control can be improved, and the valve unit 22 can be reliably prevented from coming into contact with other members and being damaged.
[0019]
Further, unlike the pressure regulating valve provided in the piston of the conventional damping device (Japanese Patent No. 2528573) disclosed in the above publication, the damping hydraulic damper 30 according to the embodiment of the present invention has a built-in pressure regulating valve. Since the valve unit 22 is arranged outside the cylinder 12, the pressure regulating valve is adjusted later, or instead of the pressure regulating valve, an opening / closing control valve (opening variable) that is electrically controlled so that the opening is variably operated. A control valve can also be used easily.
[0020]
In the vibration damping hydraulic damper 30 according to the embodiment of the present invention, the case where the relief valve is built in the valve unit 22 together with the pressure regulating valve has been described. 14 may be incorporated in the piston 14 in the middle of the oil passage penetrating the solid portion. By doing so, the relief valve originally requires a large flow rate, and when it is built in the valve unit 22, the pipes 24 and 25 have a large diameter, but this can be prevented.
[0021]
Further, in the vibration damping hydraulic damper 30 according to the above-described embodiment, the case where the valve unit 22 includes a pressure regulating valve has been described. Good. By doing so, since the valve unit 22 is provided outside the cylinder 12, the open / close control valve can be electrically controlled without problems in wiring and insulation.
[0022]
Although the embodiments of the present invention have been specifically described above, the present invention is not limited to the above-described embodiments, and various other modifications can be made based on the technical idea of the present invention. It is possible.
[0023]
【The invention's effect】
As explained above, according to the hydraulic damper for vibration control of the present invention, since the valve unit is installed on the extension line of the reciprocating motion axis of the piston, the dimension in the direction perpendicular to the axial direction of the cylinder can be reduced. The damping hydraulic damper can be provided. For this reason, the degree of freedom in layout of the hydraulic damper for vibration control can be improved, and the valve unit can be reliably prevented from being damaged due to contact with other members.
[0024]
Further, unlike the pressure regulating valve provided in the piston of the conventional damping device disclosed in the above publication, the damping hydraulic damper according to the present invention has a valve unit with a built-in pressure regulating valve disposed outside the cylinder. It is also possible to easily adjust the pressure regulating valve later, or to use an opening degree variable control valve that is electrically controlled so that the opening degree is variably controlled during operation, instead of the pressure regulating valve.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a configuration of a vibration damping hydraulic damper 30 according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a configuration of a conventional seismic damping hydraulic damper 10;
[Explanation of symbols]
10 Damping hydraulic damper 12 Cylinder 12a, 12b Hydraulic chamber 14 Piston 16 Piston rod 18 Connecting member 20 Ball joint 22 Valve unit 24, 25 Piping 30 Damping hydraulic damper

Claims (2)

A pressure regulating valve that is provided in the middle of an oil passage that communicates with two hydraulic chambers provided on both sides of the piston in the cylinder, and that automatically adjusts the opening to regulate the damping coefficient, and a pressure greater than a predetermined value In a hydraulic damper for vibration control, which has a valve unit that includes a relief valve that opens and protects the hydraulic system from damage when
A hydraulic damper for vibration control, wherein the valve unit is installed in a connecting member connected on an extension of the axis of the cylinder. 2. The damping hydraulic damper according to claim 1, wherein a control valve whose opening degree is variable is incorporated in the valve unit instead of the pressure regulating valve.

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