CN103511402A - Method for preventing hydraulic lock and special pressure balance device for preventing hydraulic lock - Google Patents
Method for preventing hydraulic lock and special pressure balance device for preventing hydraulic lock Download PDFInfo
- Publication number
- CN103511402A CN103511402A CN201210200163.5A CN201210200163A CN103511402A CN 103511402 A CN103511402 A CN 103511402A CN 201210200163 A CN201210200163 A CN 201210200163A CN 103511402 A CN103511402 A CN 103511402A
- Authority
- CN
- China
- Prior art keywords
- hydraulic lock
- hydraulic
- pressure balance
- balance device
- special pressure
- 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
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The invention belongs to the technical field of hydraulic system design, and relates to a method for preventing the hydraulic lock and a special pressure balance device for preventing the hydraulic lock. The special pressure balance device for preventing the hydraulic lock comprises an outer barrel (3), a piston (5), an end cover (2), a sealing ring (1) and a check ring (4). A pipe nozzle is reserved on the end cover (2), and a throttle hole (6) is formed in the pipe nozzle. According to the method for preventing the hydraulic lock, the special pressure balance device is connected between the closed area of a hydraulic system and a main hydraulic system pipeline. The pressure balance device is simple in structure, small in size and free of maintenance. After the pressure balance device is additionally arranged in the hydraulic system, the pressure of the system can be kept, the fault of the hydraulic lock is avoided, and working reliability of the system is improved.
Description
Technical field
The invention belongs to design of Hydraulic System technical field, relate to a kind of method and special purpose device thereof that prevents hydraulically locking.
Background technique
A hydraulic system part is because use state changes, can form closed area, hydraulic oil in closed area is subject to ambient temperature variable effect, in closed area, produce isochoric expansion pressure, the swelling pressure are greater than after the pressure maximum that system can bear, related accessories will produce hydraulically locking phenomenon, causes systemic-function to be lost.
In hydraulic system closed area, the solution of the swelling pressure is mainly to use thermal expansion valve or compensator at present.The advantage of thermal expansion valve is that volume is little, simple in structure, and shortcoming is after fluid discharges, if closed area inner fluid temperature declines, volume shrinkage, thermal expansion valve is owing to only having unidirectional communication function, can not back repairing, need to there is corresponding accessory that repairing function is provided.As thermal expansion valve being just installed in most aircraft flap system liquid force feed locks.Compensator can provide high pressure to discharge and system repairing function, but owing to being subject to volume and weight limits, its repairing amount is limited.If repairing amount demand is larger, compensator volume weight can increase a lot.As just very large in A340 aircraft turning system compensator volume.
Summary of the invention
Technical problem to be solved by this invention is: keeping, under the substantially constant prerequisite of original system working principle, providing a kind of simple and practical method that prevents hydraulically locking and special pressure balace weight thereof.
Technological scheme of the present invention is: a kind of special pressure balace weight that prevents hydraulically locking, is characterized by: described pressurizer comprises urceolus 3, piston 5, end cap 2, seal ring 1 and back-up ring 4; On described end cap 2, leave ozzle, throttle orifice 6 is set in ozzle.
A method that prevents hydraulically locking, is characterized by: between the closed area of hydraulic system and main hydraulic system pipeline, access an above-mentioned pressurizer.
The invention has the beneficial effects as follows: the pressurizer in the present invention is simple in structure, and volume is little, non-maintaining; System increases after pressurizer, can keeping system pressure, avoid occurring hydraulically locking fault, and improved the functional reliability of system.
Accompanying drawing explanation
Fig. 1 is the structural representation of pressurizer in the present invention;
Fig. 2 is a kind of embodiment theory diagram of the present invention;
Wherein, 1-seal ring, 2-end cap, 3-urceolus, 4-back-up ring, 5-piston, 6-throttle orifice, 7-check valve, 8-turning accumulator, 9-micro pressure table, 10-inflation valve, 11-subtract and swing back oily compensator, 12-coordination valve, 13-and turn and subtract pendulum booster, 14-pressurizer, 15-hydraulic buttery valve.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.
Referring to Fig. 1, a kind of special pressure balace weight 14 that prevents hydraulically locking in the present invention, comprises urceolus 3, piston 5, end cap 2, seal ring 1 and back-up ring 4; On described end cap 2, leave ozzle, throttle orifice 6 is set in ozzle.
For preventing that in closed area, liquid temperature influence produces isochoric expansion, avoid occurring hydraulically locking phenomenon, this method is by increase an above-mentioned pressurizer 14 between closed area and main hydraulic system pipeline, make original closed area volume by the fixed changable type that changes to, the isochoric expansion occurring in closed area changes isobaric expansion into, thereby avoids occurring in closed area hydraulically locking phenomenon.
Pressurizer 14 is similar with accumulator, and difference is: pressurizer 14Liang chamber all connects hydraulic oil; Throttle orifice 6 is set, after effectively preventing that closed state from destroying, because pressurizer 14 piston 5 both sides exist pressure difference to produce hydraulic shock and noise in the ozzle of two ends.
Referring to Fig. 2, the embodiment shown in it is for being used the aircraft turning system schematic diagram after the present invention improves.Described turning system comprises check valve 7, turning accumulator 8, micro pressure table 9, inflation valve 10, subtract swing back oily compensator 11, coordination valve 12, turning subtracts pendulum booster 13, hydraulic buttery valve 15.Wherein, turn and subtract pendulum booster 13 and hydraulic buttery valve 15 and pipeline composition closed area thereof.Cut-in pressure balace weight 14 between pressure piping in closed area and main hydraulic system.
In former turning system, increase hydraulic balancer, make to turn to subtract and swing back the closed area volume that forms in oil circuit by the fixed changable type that changes to, make in original closed area the isochoric expansion forming change isobaric expansion into by hydraulic balancer, avoiding turning subtracting to swing back there is high pressure locking in oil circuit; Turning subtracts and swings back oil circuit and increase after hydraulic balancer, and the operating mode that subtracts pendulum booster of turning is still design point, and the dynamic antivibration value that subtracts pendulum booster of therefore turning remains unchanged, and has effectively avoided the change of aircraft turning system dynamic antivibration performance.
When design and installation pressurizer, should follow following steps:
A), according to the Environmental Conditions temperature of closed area and Maximum operating temperature value, determine the range of temperature of liquid in closed area;
B) calculate the volume change of liquid volume in range of temperature in closed area, tentatively determine the actual volume of pressurizer 14;
C) system increases after pressurizer, according to the time of day of system, carries out the temperature variation test of knowing the real situation; System is keeping under the condition of working pressure, by operating temperature lower limit carry out fully cooling after, cutting system pressure, then be warming up to gradually the fluid operating temperature upper limit, fully after insulation, whether in inspection closed area, whether liquid pressure value is less than the permissible working pressure of all annexes, suitable to verify the actual volume of pressurizer;
D) adopt suitable mounting type, in original system, increase pressurizer;
E) use checking, the integrity of verification system function and reliability.
In this embodiment, use after the present invention, its advantage shows: system increases after hydraulic balancer, and fundamentally having solved turns subtracts the hydraulically locking phenomenon that swings back the appearance of oil circuit hydraulic buttery valve, has improved the functional reliability of system; Hydraulic buttery valve operating mode is optimized, and has extended the working life of hydraulic buttery valve; System increases after hydraulic balancer, and turning subtracts pendulum booster and is still operated in design point, and its dynamic antivibration value does not change, and therefore, does not need again by test, to adjust to turn to subtract the dynamic antivibration value of pendulum booster, has reduced system test expense expenditure.
Claims (2)
1. a special pressure balace weight that prevents hydraulically locking, is characterized by: described special pressure balace weight comprises urceolus (3), piston (5), end cap (2), seal ring (1) and back-up ring (4); Described end cap leaves ozzle on (2), and throttle orifice (6) is set in ozzle.
2. right to use requires a method that prevents hydraulically locking for special pressure balace weight described in 1, it is characterized by: between the closed area of hydraulic system and main hydraulic system pipeline, access a described special pressure balace weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210200163.5A CN103511402A (en) | 2012-06-18 | 2012-06-18 | Method for preventing hydraulic lock and special pressure balance device for preventing hydraulic lock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210200163.5A CN103511402A (en) | 2012-06-18 | 2012-06-18 | Method for preventing hydraulic lock and special pressure balance device for preventing hydraulic lock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103511402A true CN103511402A (en) | 2014-01-15 |
Family
ID=49894658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210200163.5A Pending CN103511402A (en) | 2012-06-18 | 2012-06-18 | Method for preventing hydraulic lock and special pressure balance device for preventing hydraulic lock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103511402A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790893A (en) * | 2014-01-21 | 2014-05-14 | 中国海洋石油总公司 | Anti-liquid-locking piston mechanism |
| CN104455898A (en) * | 2014-12-08 | 2015-03-25 | 哈动国家水力发电设备工程技术研究中心有限公司 | Automatic pipe pressure balancer with axial expansion regulation function |
| CN105351268A (en) * | 2015-10-16 | 2016-02-24 | 北京精密机电控制设备研究所 | Expansion valve used for electro-hydraulic servo mechanism |
| CN110715056A (en) * | 2019-10-21 | 2020-01-21 | 高新兴物联科技有限公司 | Seal ring and housing |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4098237A (en) * | 1974-08-18 | 1978-07-04 | Jaime Suquet | Internal combustion engine |
| EP0206119A1 (en) * | 1985-06-13 | 1986-12-30 | Shen, Hanshi Petroleum and Chemical Factory | Method and apparatus for eliminating cavitation in hydraulic systems |
| EP0902193B1 (en) * | 1997-09-12 | 2003-10-29 | Hydac Technology Gmbh | Piston accumulator with sealing device comprising deep-bed filter |
| CN101387350A (en) * | 2007-09-10 | 2009-03-18 | 玛珂系统分析和开发有限公司 | Pressure limiting valve |
| CN201306169Y (en) * | 2008-12-09 | 2009-09-09 | 沈阳矿山机械有限公司 | High pressure water hydraulic balancing and sealing system of development machine |
| CN201687390U (en) * | 2010-05-06 | 2010-12-29 | 中国石油集团钻井工程技术研究院 | Pressure compensator of guide drill tool hydraulic system |
| CN102359531A (en) * | 2011-09-29 | 2012-02-22 | 中国北方车辆研究所 | Single-cylinder shock absorber |
-
2012
- 2012-06-18 CN CN201210200163.5A patent/CN103511402A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4098237A (en) * | 1974-08-18 | 1978-07-04 | Jaime Suquet | Internal combustion engine |
| EP0206119A1 (en) * | 1985-06-13 | 1986-12-30 | Shen, Hanshi Petroleum and Chemical Factory | Method and apparatus for eliminating cavitation in hydraulic systems |
| EP0902193B1 (en) * | 1997-09-12 | 2003-10-29 | Hydac Technology Gmbh | Piston accumulator with sealing device comprising deep-bed filter |
| CN101387350A (en) * | 2007-09-10 | 2009-03-18 | 玛珂系统分析和开发有限公司 | Pressure limiting valve |
| DE102007042982A1 (en) * | 2007-09-10 | 2009-04-16 | Marco Systemanalyse Und Entwicklung Gmbh | Pressure limiting valve i.e. two-stage switch valve, has bodies provided with flow passing pipeline, and valve units provided at inner side of bodies and provided with sealing ring, which is provided with flow limiting element |
| CN201306169Y (en) * | 2008-12-09 | 2009-09-09 | 沈阳矿山机械有限公司 | High pressure water hydraulic balancing and sealing system of development machine |
| CN201687390U (en) * | 2010-05-06 | 2010-12-29 | 中国石油集团钻井工程技术研究院 | Pressure compensator of guide drill tool hydraulic system |
| CN102359531A (en) * | 2011-09-29 | 2012-02-22 | 中国北方车辆研究所 | Single-cylinder shock absorber |
Non-Patent Citations (2)
| Title |
|---|
| 唐有才等: "某型飞机转弯减摆系统改进设计", 《液压与气动》 * |
| 罗林等: "某型飞机液压膨胀导致转弯系统失效及其改进方案", 《中国航空学会液压气动专业2005年学术讨论会论文集》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790893A (en) * | 2014-01-21 | 2014-05-14 | 中国海洋石油总公司 | Anti-liquid-locking piston mechanism |
| CN103790893B (en) * | 2014-01-21 | 2016-03-30 | 中国海洋石油总公司 | liquid-proof lock piston mechanism |
| CN104455898A (en) * | 2014-12-08 | 2015-03-25 | 哈动国家水力发电设备工程技术研究中心有限公司 | Automatic pipe pressure balancer with axial expansion regulation function |
| CN104455898B (en) * | 2014-12-08 | 2017-02-22 | 哈动国家水力发电设备工程技术研究中心有限公司 | Automatic pipe pressure balancer with axial expansion regulation function |
| CN105351268A (en) * | 2015-10-16 | 2016-02-24 | 北京精密机电控制设备研究所 | Expansion valve used for electro-hydraulic servo mechanism |
| CN110715056A (en) * | 2019-10-21 | 2020-01-21 | 高新兴物联科技有限公司 | Seal ring and housing |
| CN110715056B (en) * | 2019-10-21 | 2021-08-03 | 高新兴物联科技有限公司 | Sealing ring and protective structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103511402A (en) | Method for preventing hydraulic lock and special pressure balance device for preventing hydraulic lock | |
| US11015671B2 (en) | Dual-stage, mixed gas/fluid shock strut servicing | |
| EP3581488B1 (en) | Dual-stage, separated gas/fluid shock strut servicing | |
| CN104421226A (en) | Hydraulic control system for reciprocating test beds | |
| CN203529917U (en) | Self-sealed fuelling nozzle having oil vapor recovery and pressure relief functions | |
| CN204003451U (en) | A kind of screw-rod air compressor gas valve | |
| CN204476380U (en) | Automatic injecting device | |
| CN201901548U (en) | Sloping prevention system of arm support | |
| CN103615421B (en) | A kind of Large-drift-diameterbalance balance valve | |
| CN207248255U (en) | A kind of indirect acting type fuel-metering device | |
| CN202451483U (en) | Double-cylinder synchronous hydraulic system and crane | |
| CN201322016Y (en) | Oil pipe explosion-proof device | |
| CN204822064U (en) | Take aircraft parking brake switch structure of temperature compensating function | |
| CN204128734U (en) | Pressure draws short circuit | |
| CN103899598B (en) | Internal expansion type locking cylinder manual-operated emergent tripper and method | |
| CN203836304U (en) | High-pressure safety pilot valve | |
| CN202833429U (en) | Energy accumulator inflation pressure online testing device of hydraulic system | |
| CN203463383U (en) | Fast-closing hydraulic system capable of automatically releasing pressure of main steam isolation valve actuator | |
| CN104728191B (en) | A kind of hydraulic system utilizing hydraulic cylinder piston rod cavity oil storage | |
| CN204533046U (en) | A kind of hydraulic pressure installation utilizing the oil storage of hydraulic cylinder piston rod cavity | |
| CN205578806U (en) | Start -up air relief valve of warship marine low speed diesel engine | |
| CN203584944U (en) | Balance valve | |
| CN207161400U (en) | A kind of high-pressure high-flow is without impact energy accumulation device control assembly | |
| CN202867685U (en) | Leakage-proof hydraulic auxiliary shock absorber | |
| CN203098715U (en) | Novel hydraulic damper |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140115 |
|
| WD01 | Invention patent application deemed withdrawn after publication |