CN104502210A - Centrifuge shaking table - Google Patents
Centrifuge shaking table Download PDFInfo
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- CN104502210A CN104502210A CN201410842382.2A CN201410842382A CN104502210A CN 104502210 A CN104502210 A CN 104502210A CN 201410842382 A CN201410842382 A CN 201410842382A CN 104502210 A CN104502210 A CN 104502210A
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Abstract
The invention provides a centrifuge shaking table, which comprises a basket, a shaking platform, four vertical hydraulic cylinders and two horizontal hydraulic cylinders, wherein the basket comprises two side plates and a bottom plate, and the inner side of each side plate is fixedly provided with two vertical hydraulic cylinders; the horizontal hydraulic cylinder is fixedly arranged between the two vertical hydraulic cylinders at the inner side of each side plate, and each vertical hydraulic cylinder is equipped with an energy accumulator; the energy accumulators are fixedly connected with the basket, and an oil distribution board assembly is arranged at the bottom of each energy accumulator; the shaking platform is positioned over the bottom plate of the basket, and is hinged to the horizontal hydraulic cylinders, and the end part of a plunger of each vertical hydraulic cylinder is provided with a planar hydrostatic bearing, so that frictional force brought by restraint is reduced, and the response accuracy of the shaking platform is effectively improved; a valve core and valve sleeve assembly of a three-stage servo valve and a valve core displacement sensor are embedded in each cylinder, so that the occupying space of the shaking platform is reduced, and the hydraulic natural frequency of an excitation system and the bandwidth of the centrifuge shaking platform are improved.
Description
Technical field
The invention belongs to hydraulic shock excitation system field, especially relate to a kind of hydro-extractor shaking table.
Background technology
Multiple degrees of freedom hydraulic platform, as movement environment and vibration environment simulation experiment device, is widely used in national defense industry, automobile, high ferro, civil engineering work and building field.Movement environment and vibration environment is provided as the development that is Large-Scale Equipment and instrument of important means of testing, qualification and examination.This motion and vibration environment analog machine, due to difference and some restrictive condition of demand, be often designed to lower-mobility structure.This lower-mobility structure in the design Problems existing how effectively to retrain, and enables designed system degree of freedom motion on request.The hydro-extractor shaking table of soil dynamic experiments research is generally single-degree-of-freedom or two-freedom, and the hydraulic shock excitation system that shaking table is made up of carrying platform, hydraulic cylinder and servo-valve, restraint device and control system form.Under the driving and control action of hydraulic power source and control system, realize single-degree-of-freedom and two-freedom seismic model experiment, study the characteristic of various soil property under seismic (seismal effect.Due to the restriction in centrifugal basket space, the constraint how realizing hydro-extractor shaking table is a difficult problem for hydro-extractor Design of vibration table.The way of restraint of current employing, owing to there is serious nonlinear characteristic, makes the characteristic of hydro-extractor shaking table poor, and the precision of seismic event reproduction is very low.Therefore, need a kind of new the way of restraint, reduce owing to retraining the nonlinear problem brought, to improve the precision of the seismic event response of hydro-extractor shaking table.
Summary of the invention
The problem to be solved in the present invention is a kind of hydro-extractor shaking table of design, realizes carrying platform degree of freedom motion on request, retrains other degree of freedom simultaneously.
For solving the problems of the technologies described above, the technical solution used in the present invention is: hydro-extractor shaking table, comprise hanging basket, shaking platform, four vertical hydraulic cylinders and two horizontal hydraulic cylinders, described hanging basket comprises two side plates and a base plate, each side plate interior sides is fixedly installed two vertical hydraulic cylinders, is fixedly installed a horizontal hydraulic cylinder between two vertical hydraulic cylinders, and each vertical hydraulic cylinder is furnished with an accumulator, accumulator is fixedly connected with hanging basket, is provided with oil-distributing plate assembly bottom accumulator; Described shaking platform is positioned at directly over hanging basket base plate, and shaking platform and horizontal hydraulic cylinder are articulated and connected.
The plunger end of described vertical hydraulic cylinder adopts plane hydrostatic bearing, and shaking platform is between two plane hydrostatic bearings of each vertical hydraulic cylinder; Adopt plane hydrostatic bearing shaking platform to be carried out to the constraint of degree of freedom, reduce the friction force retraining and bring, effectively improve the response accuracy of system.
Vertical hydraulic cylinder is as the valve body of three stage servovalve main valve, the spool valve pocket assembly of three stage servovalve is embedded in its cylinder body, spool valve pocket assembly is installed with the LVDT displacement transducer for detecting spool, reduce taking up room of system, and reduce the inertia of connecting line fluid, improve the hydraulic natural frequency of system and the frequency range of shaking platform.
Further, described vertical hydraulic cylinder comprises U-shaped cylinder body, upper end cover and bottom end cover, and upper external part, the lower external part of described cylinder body are arranged symmetrically with; Described upper end cover, bottom end cover and cylinder body are connected by screw; Be provided with steel bushing in the upper external part of described cylinder body and lower external part, in steel bushing, be provided with plunger.
Further, described cylinder body is divided into upper and lower two working chambers by spool valve pocket assembly.
Further, described hanging basket is fixedly installed four clip seats, each clip seat is equipped with a clip; Described accumulator is fixed on hanging basket by clip seat and clip, and oil-distributing plate assembly is fixedly installed on hanging basket; Described oil-distributing plate assembly and accumulator are provided with the oil duct be interconnected.By oil-distributing plate assembly to accumulator fuel feeding, by the oil pressure in accumulator adjustment vertical hydraulic cylinder, it is made to keep oil pressure constant.
Further, each described vertical hydraulic cylinder is equipped with a vertical cylinder adjustment voussoir up and down, and each horizontal hydraulic cylinder is equipped with horizontal cylinder adjustment voussoir.
Further, two vertical hydraulic cylinders of each side plate interior sides of described hanging basket are fixedly installed A steel pipe and B steel pipe, and A steel pipe is connected with oil-distributing plate assembly, vertical hydraulic cylinder respectively by tubing connector block, vertical cylinder contiguous block with B steel pipe; The sealing surface of described tubing connector block, vertical cylinder contiguous block, in same plane, prevents sealing surface place seepage.
Further, the earrings of described hanging basket is provided with plain radial bearing and rotation axis.
The advantage that the present invention has and good effect are: present invention achieves carrying platform degree of freedom vibration on request, constrain other degree of freedom simultaneously; Cylinder plunger end adopts plane hydrostatic bearing, reduces the friction force retraining and bring, effectively improves the wave response precision of shaking table; Reduce taking up room of shaking table simultaneously, improve the hydraulic natural frequency of excitation system and the frequency range of hydro-extractor shaking table.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is front view of the present invention;
Fig. 3 is the left view of Fig. 2;
Fig. 4 is that the B-B of Fig. 2 is to cut-open view;
Fig. 5 is that the A-A of Fig. 2 is to partial sectional view;
Fig. 6 is the structural representation of vertical hydraulic cylinder in the present invention;
Fig. 7 is the partial sectional view of Fig. 6.
In figure:
1-hanging basket, 2-shaking platform, 3-oil-distributing plate assembly, 4-clip seat, 5-clip, 6-vertical hydraulic cylinder, 7-horizontal hydraulic cylinder, 8-tubing connector block, 9-A steel pipe, 10-vertical cylinder contiguous block, 11-B steel pipe, 12-accumulator, 13-vertical cylinder adjustment voussoir, 14-plain radial bearing, 15-rotation axis, 16-cylinder body, 17-upper end cover, 18-steel bushing, 19-plunger, 20-plane hydrostatic bearing, 21-bottom end cover, 22-spool valve pocket assembly.
Embodiment
Below in conjunction with accompanying drawing, specific embodiments of the invention are elaborated.
As shown in Fig. 1 to 5, shown a kind of hydro-extractor shaking table, comprise hanging basket 1, shaking platform 2, four vertical hydraulic cylinders and 6 two horizontal hydraulic cylinders 7, described hanging basket 1 comprises two side plates and a base plate, each side plate interior sides is fixedly installed between two vertical hydraulic cylinders, 6, two vertical hydraulic cylinders 6 and is fixedly installed a horizontal hydraulic cylinder 7, and each vertical hydraulic cylinder 6 is furnished with an accumulator 12, accumulator 12 is fixedly connected with hanging basket 1, is provided with oil-distributing plate 3 assembly bottom accumulator 12; Described shaking platform 2 is positioned at directly over hanging basket 1 base plate, and shaking platform 2 and horizontal hydraulic cylinder 7 are articulated and connected.
As shown in Fig. 6 to 7, the plunger end of described vertical hydraulic cylinder 6 adopts plane hydrostatic bearing 20, and shaking platform 2 is between two plane hydrostatic bearings 20 of each vertical hydraulic cylinder 6; Adopt plane hydrostatic bearing shaking platform to be carried out to the constraint of degree of freedom, reduce the friction force retraining and bring, effectively improve the response accuracy of system.
Vertical hydraulic cylinder 6 is as the valve body of three stage servovalve main valve, the spool valve pocket assembly 22 of three stage servovalve is embedded in its cylinder body, spool valve pocket assembly 22 is installed with the LVDT displacement transducer for measuring spool, reduce taking up room of system, and reduce the inertia of connecting line fluid, improve the hydraulic natural frequency of system and the frequency range of shaking platform.
Described vertical hydraulic cylinder 6 comprises U-shaped cylinder body 16, upper end cover 17 and bottom end cover 21, and upper external part, the lower external part of described cylinder body 16 are arranged symmetrically with; Described upper end cover 17, bottom end cover 21 are connected by screw with cylinder body 16; Be provided with steel bushing 18 in the upper external part of described cylinder body 16 and lower external part, in steel bushing 18, be provided with plunger 19.
Described cylinder body 16 is divided into upper and lower two working chambers by spool valve pocket assembly 22.
As shown in Fig. 1 to 5, described hanging basket 1 is fixedly installed four clip seats 4, each clip seat 4 is equipped with a clip 5; Described accumulator 12 is fixed on hanging basket 1 by clip seat 4 and clip 5, and oil-distributing plate assembly 3 is fixedly installed on hanging basket 1; Described oil-distributing plate assembly 3 and accumulator 12 are provided with the oil duct be interconnected.
Each described vertical hydraulic cylinder about 6 is equipped with a vertical cylinder adjustment voussoir 13, and each horizontal hydraulic cylinder 7 is equipped with horizontal cylinder adjustment voussoir.
As shown in Figure 3, two vertical hydraulic cylinders 6 of each side plate interior sides of described hanging basket 1 are fixedly installed A steel pipe 9 and B steel pipe 11, A steel pipe 9 is connected with oil-distributing plate assembly 3, vertical hydraulic cylinder 6 respectively by tubing connector block 8, vertical cylinder contiguous block 10 with B steel pipe 11; The sealing surface of described tubing connector block 8, vertical cylinder contiguous block 10, in same plane, prevents sealing surface place seepage.
The earrings of described hanging basket 1 is provided with plain radial bearing 14 and rotation axis 15.
The present embodiment supports shaking platform 2 by four vertical hydraulic cylinders 6, adopts the technique on redundant control, controls four vertical hydraulic cylinders 6 and be synchronized with the movement, realize the vertical movement of carrying platform; Simultaneously four vertical hydraulic cylinder 6 constraint vibration platforms are around transverse axis and two rotation of the longitudinal axis, a transverse shifting, and eight plane hydrostatic bearings on employing vertical hydraulic cylinder 6, realize the lengthwise movement of shaking platform 2; Two horizontal hydraulic cylinders 7, by synchro control, realize the transverse shifting controlling shaking platform 2, control horizontally rotating of shaking platform 2 simultaneously.
Above one embodiment of the present of invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.
Claims (8)
1. hydro-extractor shaking table, it is characterized in that: comprise hanging basket (1), shaking platform (2), four vertical hydraulic cylinders (6) and two horizontal hydraulic cylinders (7), described hanging basket (1) comprises two side plates and a base plate, each side plate interior sides is fixedly installed two vertical hydraulic cylinders (6), a horizontal hydraulic cylinder (7) is fixedly installed between two vertical hydraulic cylinders (6), each vertical hydraulic cylinder (6) is furnished with an accumulator (12), accumulator (12) is fixedly connected with hanging basket (1), accumulator (12) bottom is provided with oil-distributing plate assembly (3), described shaking platform (2) is positioned at directly over hanging basket (1) base plate, and shaking platform (2) and horizontal hydraulic cylinder (7) are articulated and connected, the plunger end of described vertical hydraulic cylinder (6) adopts plane hydrostatic bearing (20), and shaking platform (2) is positioned between two plane hydrostatic bearings (20) of each vertical hydraulic cylinder (6), vertical hydraulic cylinder (6) is as the valve body of three stage servovalve main valve, the spool valve pocket assembly (22) of three stage servovalve is embedded in its cylinder body (16), spool valve pocket assembly (22) is installed with valve core displacement sensor.
2. hydro-extractor shaking table according to claim 1, it is characterized in that: described vertical hydraulic cylinder (6) comprises U-shaped cylinder body (16), upper end cover (17) and bottom end cover (21), upper external part, the lower external part of described cylinder body (16) are arranged symmetrically with; Described upper end cover (17), bottom end cover (21) and cylinder body (16) are connected by screw; Be provided with steel bushing (18) in the upper external part of described cylinder body (16) and lower external part, in steel bushing (18), be provided with plunger (19).
3. hydro-extractor shaking table according to claim 2, is characterized in that: described cylinder body (16) is divided into upper and lower two working chambers by spool valve pocket assembly (22).
4. hydro-extractor shaking table according to claim 1, is characterized in that: described hanging basket (1) is fixedly installed four clip seats (4), and each clip seat (4) is equipped with a clip (5); Described accumulator (12) is fixedly connected with clip (5) by clip seat (4) with hanging basket (1), and oil-distributing plate assembly (3) is fixedly installed on hanging basket (1); Described oil-distributing plate assembly (3) and accumulator (12) are provided with the oil duct be interconnected.
5. hydro-extractor shaking table according to claim 1, it is characterized in that: each described vertical hydraulic cylinder (6) is equipped with vertical cylinder adjustment voussoir (13) up and down, each horizontal hydraulic cylinder (7) is equipped with horizontal cylinder adjustment voussoir.
6. hydro-extractor shaking table according to claim 1, it is characterized in that: two vertical hydraulic cylinders (6) of each side plate interior sides of described hanging basket (1) are fixedly installed A steel pipe (9) and B steel pipe (11), and A steel pipe (9) is connected with oil-distributing plate assembly (3), vertical hydraulic cylinder (6) respectively by tubing connector block (8), vertical cylinder contiguous block (10) with B steel pipe (11); The sealing surface of described tubing connector block (8), vertical cylinder contiguous block (10) is in same plane.
7. hydro-extractor shaking table according to claim 1, is characterized in that: the valve core displacement sensor that described spool valve pocket assembly (22) sets firmly is LVDT displacement transducer.
8. hydro-extractor shaking table according to claim 1, is characterized in that: the earrings of described hanging basket (1) is provided with plain radial bearing (14) and rotation axis (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410842382.2A CN104502210A (en) | 2014-12-30 | 2014-12-30 | Centrifuge shaking table |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410842382.2A CN104502210A (en) | 2014-12-30 | 2014-12-30 | Centrifuge shaking table |
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| CN104502210A true CN104502210A (en) | 2015-04-08 |
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| CN201410842382.2A Pending CN104502210A (en) | 2014-12-30 | 2014-12-30 | Centrifuge shaking table |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105665154A (en) * | 2016-04-21 | 2016-06-15 | 中国工程物理研究院总体工程研究所 | Structural design for vibration reducing hanging basket of centrifuge |
| CN108318201A (en) * | 2018-01-11 | 2018-07-24 | 中国工程物理研究院总体工程研究所 | A kind of super gravity field medium-high frequency high-thrust single degree of freedom horizontal vibration platform |
| CN108414177A (en) * | 2018-06-20 | 2018-08-17 | 中国工程物理研究院总体工程研究所 | The heavy load high frequency sound electrohydraulic servo oscillation device being operated under high centrifugal field |
| CN111766033A (en) * | 2020-08-21 | 2020-10-13 | 中国工程物理研究院总体工程研究所 | Centrifuge is shaking table under water |
| WO2022062673A1 (en) * | 2020-09-25 | 2022-03-31 | 浙江大学 | Supergravity vertical vibration table |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105665154A (en) * | 2016-04-21 | 2016-06-15 | 中国工程物理研究院总体工程研究所 | Structural design for vibration reducing hanging basket of centrifuge |
| CN108318201A (en) * | 2018-01-11 | 2018-07-24 | 中国工程物理研究院总体工程研究所 | A kind of super gravity field medium-high frequency high-thrust single degree of freedom horizontal vibration platform |
| CN108414177A (en) * | 2018-06-20 | 2018-08-17 | 中国工程物理研究院总体工程研究所 | The heavy load high frequency sound electrohydraulic servo oscillation device being operated under high centrifugal field |
| CN111766033A (en) * | 2020-08-21 | 2020-10-13 | 中国工程物理研究院总体工程研究所 | Centrifuge is shaking table under water |
| WO2022062673A1 (en) * | 2020-09-25 | 2022-03-31 | 浙江大学 | Supergravity vertical vibration table |
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Application publication date: 20150408 |