KR0129690B1 - Vibration absorbing apparatus - Google Patents

Abstract

The case(50) which has the sealed up inner space on the upper part of the vibration member(10) is installed and the fluid is filled inside the case and the vibrator(60) is placed inside the charged fluid. Herein the vibrator by the guide bar and the elastic part is supported and the absorbing plate(70) that divides inside of the case into the first and the second cavity(X,Y) around the outside of the vibrator is installed and the first and the second guide hole(61a,61b) that the first and the second guide bars(80a,80b) passing through on the vibrator is formed. The first and the second elastic member(90a,90b) each on the upper and the lower is installed inside of the case and the top part of the vibrator.

Description

Reducer

1 is a block diagram showing a conventional dust reduction device.

2 is a structural diagram showing a reduction apparatus according to the present invention.

3 is a cross-sectional view taken along the line A-A 'of FIG.

* Explanation of symbols for main parts of the drawings

10: vibration member 50: case

51: fixing bolt 52: through hole

60: vibrator 61a, 61b: first, second guide hole

70: buffer plate 71: flow hole

80a, 80b: first and second guide rods 90a, 90b: first and second elastic members

The present invention relates to a device for vibrating the device, but the vibration of the object is attenuated by installing a device in the upper part of the vibrating object, in particular to improve the vibration damping effect by inserting a fluid in the sealed interior space It relates to a simplified reduction apparatus.

In general, if the vibration reduction device is installed on the vibrating object, the vibrator inside the vibration reduction device vibrates, but the original vibration object is attenuated. Such devices are used for the purpose of dustproofing ships, automobiles and buildings. One conventional example of this is shown in FIG. 1 is a structural diagram showing a conventional dust reduction device. As shown, the vibrator 20 is fixed to the upper portion of the vibrating member 10 corresponding to the vibrating structure or the machine through the spring 30 and the actuator 40 in the role of attenuator.

At this time, the actuator 40 is driven to reduce the vibration of the vibration member 10. The upper part of the vibrator 20 is provided with a vibration accelerometer 41 for detecting the acceleration and the frequency of the vibration. The vibration accelerometer 41 detects a change in the frequency of vibration of the vibrator 20 and transmits it to the controller 42. The controller 42 configures a control circuit based on the detected value, passes the amplification of the control signal through the amplifier 43, and then controls the buffer force of the actuator 40 to increase or decrease. However, such a device has a problem in that the structure is complicated and expensive manufacturing cost is required by detecting the vibration to adjust the amplifier connected to the actuator by the controller to improve the absorption performance. Accordingly, an object of the present invention is to provide a dust collecting device which improves the performance of suction without additional equipment by injecting a fluid into the case of the dust collecting device so that the vibrator collides with the fluid and have a great buffering effect during the impact. The exhaust device according to the present invention for achieving the above object is mounted on a machine or a structure with high vibration, and has a case having a sealed inner space of a predetermined size in which the fluid is filled. The inner space of the case is provided with a vibrator fixed to be movable. It is installed on the outer periphery of the vibrator and partitions the inner space of the case into two cavities, and has a buffer plate having a plurality of flow holes formed to move the fluid in the two divided cavities. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. 2 is a structural diagram showing a reduction apparatus according to the present invention. As shown in the figure, a case 50 having a closed inner space on the upper side of the vibrating vibrating member 10 is a fixing bolt 51. The fluid is indented in the case 50, and the vibrator 60 is positioned in the indented fluid. In particular, the vibrator 60 is supported by the guide rod and the elastic member to enable the inner space of the case 50 to move. A buffer plate 70 is installed on the outer circumferential portion of the vibrator 60. The buffer plate 70 divides the inner space of the case 50 together with the vibrator 60 into two first and second cavities X and Y. In addition, a flow hole is formed in the buffer plate 70 so that the fluids present in the partitioned first and second cavities XY of the case 50 flow with each other. Detailed description thereof will be described later with reference to FIG. 3. The vibrator 60 described above is formed with two first and second guide holes 61a and 61b, and two first and second guide rods 80a and 80b fixed to upper and lower ends of the case 50. ) Is penetrating. The first and second guide rods 80a and 80b serve to guide the direction of movement of the vibrator 60 during the vertical movement of the vibrator 60. In addition, the first elastic member 90a is installed on the upper end of the vibrator 60 and on the upper inner peripheral portion of the case 50. At this time, the first elastic member 90a is inserted into and supported on the first and second guide rods 80a and 80b protruding to the upper side of the vibrator 60. In addition, the second elastic member 90b is inserted into and fixed to the first and second guide rods 80a and 80b protruding from the lower side of the vibrator 60 and on the lower inner peripheral part of the case 50. It is. The first and second elastic members 90a and 90b positioned at upper and lower ends of the vibrator 60 have a function of damping vibration by applying elastic force to the vibrator 60 when vibrating. In addition, the fluid present in the first and second cavities (X, Y) is moved along with the movement of the vibrator 60 and vibrates together with the first and second elastic members (90a, 90b) and the vibrator (60). Double the absorption performance. 3 is a cross-sectional view taken along the line AA ′ of FIG. 2. As shown in the drawing, the vibrator 60 is supported in the case 50 so as to be movable. The vibrator 60 has first and second guide holes 61a and 61b, and guides the vibrator 60 by the first and second guide rods 80a and 80b passing therethrough. In particular, a buffer plate 70 is installed on the outer circumferential portion of the vibrator 60, and a plurality of flow holes 71 are formed therein. The flow hole 71 serves to increase the buffer force by allowing the fluid to flow through the flow hole 71 when the vibrator 60 vibrates up and down. Moreover, it has a function which enlarges the mass of the vibrator 60 by the addition mass effect by the viscous force of a fluid.

now. The operation of the present invention will be described in detail with reference to the above-described drawings.

When the vibrating member 10 corresponding to the machine or structure that vibrates severely vibrates, the vibrator 60 inside the reduction device case 50 fixed to the vibrating member 10 also vibrates relatively with the buffer plate 70. That is, it moves up and down. When the vibrator 60 moves up and down, the vibration force of the first and second elastic members 90a and 90b and the mass of the vibrator and the added mass by the fluid are added to the inside of the reducer, thereby vibrating the vibrating member. Is attenuated. In addition, as the vibrator 60 and the buffer plate 70 attached thereto collide with the fluid indented in the case 50, the vibration is also attenuated due to the viscosity and elasticity of the fluid. At this time, the fluid moves the flow hole 71 in the buffer plate 70 to flow through the divided first and second cavities (X, Y) and increase the buffering force. That is, the vibration of the vibrating member 10 is significantly reduced by the vibration reduction device vibrating in a state in which the vibrator 60 is attenuated due to the buffer action of the fluid and the first and second elastic members 90a and 90b.

As described above, the reducer according to the present invention increases the mass effect by the buffer effect and the viscosity of the fluid by inserting a fluid into the reducer case, the present reducer uses the buffer effect of the fluid inside the reducer The vibrator of vibrates, but effectively reduces the vibration of the vibrating member to be controlled, thus eliminating the need for an amplifier and a control device, and thus has a simple structure and a low production cost.

Claims (2)

An apparatus for absorbing vibrations mounted on a vibrating structure, the apparatus comprising: a case mounted on the vibration structure and having a sealed inner space in which fluid is filled; An oscillator installed up and down freely according to the vibration in the case; An elastic member installed in the upper and lower portions of the vibrator to allow the vibrator to move upward and downward; And a buffer plate extending along the outer circumferential edge of the vibrator and partitioning the space of the case into two cavities vertically and forming a flow hole to move the fluid up and down along the outer circumferential edge. The apparatus of claim 1, further comprising a guide rod penetrating along a guide hole formed in the vibrator to guide the vibrator to the inside of the case.