CN201125981Y - Damping valve of bridge hydraulic damper - Google Patents
Damping valve of bridge hydraulic damper Download PDFInfo
- Publication number
- CN201125981Y CN201125981Y CNU2007200889482U CN200720088948U CN201125981Y CN 201125981 Y CN201125981 Y CN 201125981Y CN U2007200889482 U CNU2007200889482 U CN U2007200889482U CN 200720088948 U CN200720088948 U CN 200720088948U CN 201125981 Y CN201125981 Y CN 201125981Y
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- valve
- damping
- spool
- spring
- valve body
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Abstract
A damping valve of a bridge hydraulic damper includes a valve body, a valve core, a spring, a guiding bar, a valve cap and hydraulic oil, which is characterized in that: the valve core can longitudinally slide in the valve body; cone of the valve core is arranged to a high order curved surface, cone bottom of the valve core is arranged to step, flow-guiding and damping hole is disposed on a spring chamber of the valve core; the columned guiding bar is equipped at center of the valve body and is sleeved with the spring. The damping valve employs a valve core structure with high order curved surface and adjusts damping index number by regulating hole diameter of the damping hole, size of the valve core step and rigidity of the spring considering hydraulic pressure and hydraulic power, so that relationship of flux and pressure of the damping valve satisfies design demands and is adapted for combination of multiple damping valves connected in series or in parallel, thereby realizing design demands of damper with different damping force and different speed.
Description
Technical field
The utility model relates to a kind of bridge structure damping device, be particularly useful for large span stayed-cable bridge, the isostructural large-tonnage hydraulic damper of suspension bridge, belong to bridge works cushion technique field, specifically relate to a kind of orifice valve of large bridge structure hydraulic damper.
Background technique
In the prior art, the damping device that is applied in the bridge works structure has polytype, as metal damper, frcition damper, viscous damper, year elastic damper, composite buffer etc., hydraulic damper had obtained increasing application in the Longspan Bridge structural seismic in recent years.Hydraulic damper has the damping effect height, is easy to realize the large-tonnage device, little, the minimum advantages such as static(al) rigidity of volume, but research is started late at home, the orifice valve of hydraulic damper still is general inclined-plane Cone valve, there is the nonadjustable defective of damping exponent, inapplicable structural vibration and earthquake motive force specificity analysis were optimized afterwards determined optimum damping exponent, generally is applicable to low speed, little tonnage damper.
Summary of the invention
The utility model provides a kind of orifice valve of bridge large-tonnage hydraulic damper, adopt the valve core structure of high order curved surface, under the situation of considering the hydraulic pressure and the power of surging, realize the adjustable of damping exponent by the aperture of adjusting damping hole, the size of spool step, the rigidity of spring, make the flow of orifice valve and the relation of pressure meet design requirement.A plurality of orifice valves are realized the damper designs requirement of different damping power, friction speed by the combination of series, parallel mode.
The technical solution of the utility model is achieved in that
Orifice valve mainly is made of 5 parts such as valve body a, spool b, spring c, guide rod d, valve gap e.Under pressure, hydraulic oil is pushed spool b open from the throttle orifice m of valve body a end, in gap n enters valve body a, finishes the power consumption process, and the damping function of orifice valve is achieved; The cone of spool b is arranged to high order curved surface f, and the cone root of spool b is arranged to step g, the performance of orifice valve when coming regulating spool b to open greatly by the power of surging.Cylindrical guide rod d is established at the center in the valve body a, and guide rod d is with spring c outward, and spring c adopts disk spring, has pod apertures j on the spring storehouse, and this pod apertures j has damping function concurrently, produces vibration to avoid spool b when moving; Prolong on the guide rod d and vertically have guiding gutter k; Sealed groove h is set on valve body a, and pod apertures i and l flow out through pod apertures i and pod apertures l through post-decompression hydraulic oil.Under the backpressure effect, spool b closes throttle orifice m under the effect of spring c.Damping function under the reversed load effect is finished by the identical orifice valve of reverse installation.In the specific implementation, can adjust the aperture of damping hole j, the size of spool step g, the rigidity of spring c etc., realize the adjustable of damping exponent according to the requirement of hydraulic damper design to pressure and flow.In addition, valve body a, spool b, guide rod d, valve gap e all can adopt alloyed steel 40Cr to make, and spring c can adopt the spring steel manufacturing.Hydraulic oil can adopt the less silicone oil of viscosity-temperature coefficient.
Advantage of the present utility model:
1, by adopting high order curved surface valve core cone and step, the damper damping exponent can reach 0.3, the damping effect height, and adapt to large-tonnage and high-speed;
2, when the low speed displacement, the rigidity of damper is extremely low, structure stress is not exerted an influence, to the not constraint of distortion of structure under the temperature action;
3, less demanding to hydraulic oil viscosity;
4, structure construction advantages of simple, it is not high that each parts is made required precision, is convenient to make and install.
Description of drawings
Fig. 1 is vertical elevation of the present utility model (A) and longitudinal sectional drawing (A1).
Fig. 2 is the pressure～discharge relation curve of the utility model embodiment orifice valve.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is further specified, this embodiment is the orifice valve that is used for 240 meters prestressed concrete box girder cable stayed bridges of main span hydraulic damper.This damper designs parameter is: speed index 0.3, damping constant 5000 (kN (m/s)
-0.3), bearing capacity 5000kN (when speed is 1.0m/s), stroke ± 330mm.3 same orifice valve parallel connections of unidirectional employing have two-wayly been used 6 orifice valves altogether.Orifice valve is installed in the mounting hole of hydraulic cylinder piston.Valve body a, spool b, guide rod d, valve gap e all adopt alloyed steel 40Cr to make, and spring d adopts the spring steel manufacturing.Hydraulic oil adopts the less polymethylphenyl siloxane fluid of viscosity-temperature coefficient.
Fig. 1 is the vertical elevation (A) and the longitudinal sectional drawing (A1) of the utility model orifice valve.Orifice valve is tubular structure, adopts precision-fit between spool b and valve body a, but makes spool b longitudinal sliding motion in valve body a; The cone of spool b is arranged to high order curved surface f, and the cone root of spool b is arranged to step g, adopts precision-fit between the high order curved surface f of the cone of spool b and throttle orifice m, and root minimum clearance is provided with by design; Valve gap e adopts bolt of serration to be connected with valve body a, cylindrical guide rod d is established at the center in the valve body a, guide rod d is with disk spring c outward, guide rod d adopts bolt of serration to be fixed on the valve gap e, prolong on the guide rod d and vertically have guiding gutter k, sealed groove h is set on valve body a and has pod apertures i and pod apertures l, have the pod apertures damping hole j that holds concurrently on the spring storehouse of spool b.
When bridge structure produces conduct vibrations to hydraulic damper, in the hole, produce pressure at orifice valve throttle orifice m place by hydraulic oil, this pressure effect is pushed spool b open the generation certain displacement, produce gap n between high order curved surface f and throttle orifice m, forming hydraulic oil liquid flows, thereby produce power consumption, the hydraulic oil of the throttle orifice m that flows through flows out valve body a through pod apertures i, l.The pressure that produces in the hole when throttle orifice m place hydraulic oil progressively reduces and when disappearing, spool b is progressively pushed back under spring action, makes that producing gap n between high order curved surface f and throttle orifice m progressively reduces, until closing throttle orifice m.The same orifice valve of oppositely installing in hydraulic damper is finished reverse damping.
Fig. 2 is the pressure～discharge relation curve of the utility model embodiment orifice valve.Single orifice valve pressure and discharge relation are p=1.177529Q
0.3, pressure p units MPa wherein, flow Q unit/ml/s.3 orifice valve parallel connections, making damper speed and damping force close is P=5000v
0.3, the kN of damping force P unit wherein, the m/s of speed v unit.
Orifice valve machine simulation as calculated before enforcement is made and is installed after experimental test is tested its pressure～discharge relation curve in the present embodiment.
Claims (3)
1, a kind of orifice valve of bridge hydraulic damper is made of valve body (a), spool (b), spring (c), guide rod (d), valve gap (e), hydraulic oil, it is characterized in that: spool (b) can longitudinal sliding motion in valve body (a); The cone of spool (b) is arranged to high order curved surface (f), and the cone root of spool (b) is arranged to step (g), has the pod apertures damping hole (j) of holding concurrently on the spring storehouse of spool (b); Cylindrical guide rod (d) is arranged on interior center of valve body (a) and outer casing spring (c).
2, the orifice valve of bridge hydraulic damper according to claim 1 is characterized in that: sealed groove (h) is set on valve body (a) and has pod apertures (i, l), have guiding gutter (k) on the guide rod (d).
3, the orifice valve of bridge hydraulic damper according to claim 1 is characterized in that: between spool (b) and the valve body (a), and all adopt precision-fit between the high order curved surface (f) of the cone of spool (b) and the throttle orifice (m).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200889482U CN201125981Y (en) | 2007-12-10 | 2007-12-10 | Damping valve of bridge hydraulic damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200889482U CN201125981Y (en) | 2007-12-10 | 2007-12-10 | Damping valve of bridge hydraulic damper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201125981Y true CN201125981Y (en) | 2008-10-01 |
Family
ID=39999450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200889482U Expired - Lifetime CN201125981Y (en) | 2007-12-10 | 2007-12-10 | Damping valve of bridge hydraulic damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201125981Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101492941B (en) * | 2008-12-26 | 2011-03-16 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Dual-tuning vibration reduction method for liquid quality |
| CN106838099A (en) * | 2017-01-06 | 2017-06-13 | 中铁大桥科学研究院有限公司 | The method for designing and damper of a kind of multi-functional viscous damper of variable element |
-
2007
- 2007-12-10 CN CNU2007200889482U patent/CN201125981Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101492941B (en) * | 2008-12-26 | 2011-03-16 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Dual-tuning vibration reduction method for liquid quality |
| CN106838099A (en) * | 2017-01-06 | 2017-06-13 | 中铁大桥科学研究院有限公司 | The method for designing and damper of a kind of multi-functional viscous damper of variable element |
| CN106838099B (en) * | 2017-01-06 | 2019-02-26 | 中铁大桥科学研究院有限公司 | A kind of design method and damper of the multi-functional viscous damper of variable element |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: GROUP CO., LTD., ZHONGTIE DAQIAO BUREAU Free format text: FORMER OWNER: CHINA ZHONGTIE MAJOR BRIDGE ENGINEERING CO., LTD. Effective date: 20150226 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150226 Address after: 103 No. 430034 Hubei Province in Qiaokou District of Wuhan city road construction Patentee after: China Zhongtie Major Bridge Engineering Group Co., Ltd. Patentee after: Group Co., Ltd., Zhongtie Daqiao Bureau Address before: 103 No. 430034 Hubei Province in Qiaokou District of Wuhan city road construction Patentee before: China Zhongtie Major Bridge Engineering Group Co., Ltd. Patentee before: China Zhongtie Major Bridge Engineering Co., Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: No. 103 430000 Qiaokou District in Hubei province Wuhan city road construction Patentee after: BRIDGE SCIENCE AND TECHNOLOGY INSTITUTE CO., LTD., CHINA RAILWAY ENGINEERING GROUP Patentee after: Group Co., Ltd., Zhongtie Daqiao Bureau Address before: 103 No. 430034 Hubei Province in Qiaokou District of Wuhan city road construction Patentee before: China Zhongtie Major Bridge Engineering Group Co., Ltd. Patentee before: Group Co., Ltd., Zhongtie Daqiao Bureau |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081001 |