JPH0321752U - - Google Patents
Info
- Publication number
- JPH0321752U JPH0321752U JP8143389U JP8143389U JPH0321752U JP H0321752 U JPH0321752 U JP H0321752U JP 8143389 U JP8143389 U JP 8143389U JP 8143389 U JP8143389 U JP 8143389U JP H0321752 U JPH0321752 U JP H0321752U
- Authority
- JP
- Japan
- Prior art keywords
- vibration table
- servo
- servo valves
- hydraulic cylinder
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Vibration Prevention Devices (AREA)
Description
第１図は本考案の一実施例を示す系統図である
。第２図は公知の電気油圧式地震振動台を示す系
統図、第３図、第４図、第５図はそれぞれ第２図
の振動台による再現加速度波形を示す波形図、第
６図は第２図の振動台における振動数と再現加速
度波形の歪率との関係を示す線図である。
１……波形信号発生器、２，２ａ……サーボ増
巾器、３，３ａ……ノズルフラツパー、４，４ａ
……サーボ弁、５，５ａ……スプール弁、６……
ピストン、７……油圧シリンダー、８……継手、
９……振動台、１０，１０ａ……増巾器、１１，
１１ａ……サーボ弁選択スイツチ。
FIG. 1 is a system diagram showing an embodiment of the present invention. Figure 2 is a system diagram showing a known electro-hydraulic seismic shaking table, Figures 3, 4 and 5 are waveform diagrams showing acceleration waveforms reproduced by the shaking table in Figure 2, and Figure 6 is a diagram showing the acceleration waveforms reproduced by the shaking table in Figure 2. 3 is a diagram showing the relationship between the vibration frequency and the distortion rate of the reproduced acceleration waveform in the vibration table of FIG. 2. FIG. 1... Waveform signal generator, 2, 2a... Servo amplifier, 3, 3a... Nozzle flapper, 4, 4a
... Servo valve, 5, 5a ... Spool valve, 6 ...
Piston, 7... Hydraulic cylinder, 8... Coupling,
9... Shaking table, 10, 10a... Amplifier, 11,
11a... Servo valve selection switch.
Claims (1)
パーを介してサーボ弁のスプール弁を制御するこ
とにより油圧シリンダーを介して振動台を加振す
るようにした電気油圧式振動台において、同一油
圧シリンダーに対し互いに並列的に接続された複
数の比較的小容量のサーボ弁と、加振振巾の大小
に応じて上記同一油圧シリンダーに接続されるサ
ーボ弁の数を増減するように切換えるサーボ弁選
択スイツチとを具え、上記各サーボ弁を最大負荷
付近で作動するようにしたことを特徴とする電気
油圧式振動台。 In an electrohydraulic vibration table, the vibration table is vibrated through a hydraulic cylinder by amplifying the output of a waveform signal generator and controlling a spool valve of a servo valve through a nozzle flapper. A plurality of relatively small-capacity servo valves connected in parallel to the cylinder, and a servo valve that switches to increase or decrease the number of servo valves connected to the same hydraulic cylinder according to the magnitude of excitation width. An electro-hydraulic vibration table characterized in that it is equipped with a selection switch, and each of the servo valves described above is operated near the maximum load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8143389U JPH0321752U (en) | 1989-07-11 | 1989-07-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8143389U JPH0321752U (en) | 1989-07-11 | 1989-07-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0321752U true JPH0321752U (en) | 1991-03-05 |
Family
ID=31627376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8143389U Pending JPH0321752U (en) | 1989-07-11 | 1989-07-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0321752U (en) |
-
1989
- 1989-07-11 JP JP8143389U patent/JPH0321752U/ja active Pending
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