CN106089820B - A kind of structural test based on along inverse load Discrete control loads actuating system - Google Patents
A kind of structural test based on along inverse load Discrete control loads actuating system Download PDFInfo
- Publication number
- CN106089820B CN106089820B CN201610709191.8A CN201610709191A CN106089820B CN 106089820 B CN106089820 B CN 106089820B CN 201610709191 A CN201610709191 A CN 201610709191A CN 106089820 B CN106089820 B CN 106089820B
- Authority
- CN
- China
- Prior art keywords
- servo valve
- hydraulic cylinder
- loading
- oil
- load
- 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.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses it is a kind of based on fatigue test along the loading actuating system of inverse load servo valve Discrete control, the Loading Control device of the system sends control signal according to fatigue test load spectrum, simultaneously according to load condition and loading spectrum, judge that hydraulic cylinder loads working condition；When hydraulic cylinder is in inverse load working condition, Loading Control device closes secondary servo valve oil circuit, opens main servo valve oil road；When hydraulic cylinder is in along working condition is carried, Loading Control device control main servo valve oil road is closed, and then hydraulic cylinder is isolated with the cut-out of system oil sources, opens simultaneously secondary servo valve oil circuit；The system selects different servo valve circuit to control hydraulic cylinder according to different load conditions in fatigue test, changes system throttles characteristic, is lost with this to reduce system throttles, improves system energy utilization ratio.
Description
Technical field
It is more particularly to a kind of to be divided based on fatigue test along inverse load servo valve the invention belongs to electro-hydraulic servo control technical field
The loading actuating system of section control.
Background technology
In the entire development process of aircraft, complete aircraft structural test has very important status, is all fly
Row device take off before the only way which must be passed；Full machine structural test includes slow test and fatigue test；Fatigue test is actual according to aircraft
The flight profile, mission profile used, establishment test load spectrum carry out testing machine CYCLIC LOADING, and main purpose is exposed housing construction fatigue
The key position of weak part and fatigue damage so as to be improved to testpieces or its service life is assessed, is formulated and closed
The repair cycle of reason.With the development of aircraft model, aircraft size is increasing, and loading passage is more and more, pilot system meeting
Become to become increasingly complex, while also the performance of loading actuator can be given to put forward higher requirements.At present, general loading actuator
Scheme be all large-scale hydraulic oil source at one come to entire loading system fuel feeding by the way of.
The content of the invention
Based on this, the invention discloses it is a kind of based on fatigue test along the loading start system of inverse load servo valve Discrete control
System；
The system comprises：Constant displacement pump, constant-seed motor, fuel tank, servo valve, hydraulic cylinder and valve control cylinder mode unit；
The constant-seed motor drives constant displacement pump to rotate, and the high pressure oil in fuel tank is supplied hydraulic cylinder by servo valve；
The system is different according to different load condition selections in fatigue test by control valve draining pressure cylinder unit
Servo valve controls hydraulic cylinder.
The present invention is proposed specifically for fatigue test based on the loading actuating system along inverse load Discrete control and control
Scheme processed；Using symmetrical hydraulic cylinder architectural characteristic and fatigue test loading characteristic, loading system is made full use of along under load operating mode
Fluid-transmission feature using servo valve plus check valve oil circuit, substantially reduces system throttles loss, improves system energy utilization
Efficiency.
Description of the drawings
Actuating system principle is loaded based on the structural test along inverse load Discrete control in the one embodiment of the invention of Fig. 1 positions
Figure；
Fig. 2 is hydraulic cylinder works four-quadrant schematic diagram in one embodiment of the invention；
Wherein 1- fuel tanks, 2- constant displacement pumps, 3- constant-seed motors, 4- overflow valves, 5- check valves, 6- accumulators, 7- main servo valves,
8- check valves, 9- pair servo valves, 10- hydraulic cylinders.
Specific embodiment
In one embodiment, the invention discloses it is a kind of based on fatigue test along the loading of inverse load servo valve Discrete control
Actuating system；
The system comprises：Constant displacement pump, constant-seed motor, fuel tank, servo valve, hydraulic cylinder and valve control cylinder mode unit；
The constant-seed motor drives constant displacement pump to rotate, and the high pressure oil in fuel tank is supplied hydraulic cylinder by servo valve；
The system is watched by control valve draining pressure cylinder unit according to different load condition selections are different in fatigue test
Valve is taken to control hydraulic cylinder.
In the present embodiment, loading actuating system schematic diagram as shown in Figure 1, using double servo valves to loading system hydraulic pressure
Cylinder is controlled；By typical valve-controlled cylinder system, according to different load conditions in fatigue test different servo valve is selected to return
Road controls hydraulic cylinder, changes system throttles characteristic, is lost with this to reduce system throttles, improves system energy using effect
Rate.
In one embodiment, the system also includes there is accumulator, the accumulator is used to store the high pressure in fuel tank
Oil, after accumulator is full of high pressure oil, constant-seed motor stops operating, and the high pressure oil stored before is passed through servo by accumulator
Valve supplies hydraulic cylinder.
In the present embodiment, the low-pressure hydraulic oil pump in the fuel tank is high pressure oil, high pressure oil part supply therein
Accumulator stores, and another part supplies hydraulic cylinder by servo valve, is used for hydraulic cylinder loading start；When accumulator is full of
Afterwards, motor stalls, accumulator by the high pressure oil stored before by servo valve (main servo valve or secondary servo valve it
One) hydraulic cylinder is supplied.
In one embodiment, the servo valve includes main servo valve and secondary servo valve.
In one embodiment, the system also includes there is Loading Control device, the Loading Control device is used to judge hydraulic pressure
The loading working condition of cylinder, and control the opening and closing of main servo oil circuit and secondary servo valve oil circuit.
In the present embodiment, the Loading Control device for force data is gathered to system, pressure signal is carried out at analysis
Reason, while instructed according to loading, electric signal is sent to servo valve, and then by the way that servo valve openings of sizes is controlled to control hydraulic cylinder
Loading force size sends overflow valve electric signal, control system oil pressure relief.The Loading Control device is additionally operable to will according to system
Ask hydraulic cylinder to the situation of change of the size of power that is applied within a certain period of time by subjects and the situation of change of loading force with
The relation in hydraulic cylinder speed direction judges that hydraulic cylinder is in along load or inverse load working condition.
In one embodiment, when hydraulic cylinder is in inverse load working condition, the secondary servo valve oil circuit of Loading Control device control
It closes, main servo valve oil road is opened.
In the present embodiment, for valve control loading system, due to servo valve restriction characteristic, the sum of hydraulic cylinder height cavity pressure
Consistently equal to system oil supply pressure；So system is carrying out fatigue test, loading instruction is sinusoidal loading time spectrum, at hydraulic cylinder
When inverse load working condition, the increase of high pressure chest volume, low pressure chamber volume reducing, and high-low pressure chamber does not change during this,
System high pressure oil is into high pressure chest at this time, and low pressure chamber low pressure oil enters fuel tank, and servo valve throttling action is smaller, energy loss compared with
It is low.
In one embodiment, when hydraulic cylinder is in along working condition is carried, Loading Control device control main servo valve oil road
It closes, and then hydraulic cylinder is isolated with the cut-out of system oil sources, open simultaneously secondary servo valve oil circuit.
In the present embodiment, when hydraulic cylinder is in along working condition is carried, high pressure chest volume reducing, low pressure chamber volume increases
Greatly, at this time if by system high pressure oil into low pressure chamber after servo valve throttles, high pressure chest high pressure oil is also all by servo
If being returned directly to fuel tank after valve throttling, servo valve throttling action will clearly, and energy utilization rate significantly reduces, and causes
System energy very big waste will be the part energy that can not ignore for full machine fatigue test of structure.In view of symmetrical liquid
Press cylinder device characteristic, when hydraulic cylinder is in along operating mode is carried, since two chamber sectional areas are equal, so high pressure chest hydraulic oil flowing out stream
Amount is equal with low pressure chamber low pressure oil inflow flow；On the basis of hydraulic cylinder is controlled by main servo valve, increase secondary valve and check valve
It carries out along the control carried under operating mode；Under along operating mode is carried, high pressure chest volume reducing, low pressure chamber volume increase, by switching servo
Valve controls, and hydraulic cylinder with system high pressure oil sources is isolated, hydraulic cylinder is directly controlled by secondary servo valve oil circuit.
In one embodiment, in aircraft full size structure fatigue experiment, the power loading spectrum feature of loading system use
Determine that loading hydraulic cylinder will be in the working condition along inverse load checker；The so-called inverse working condition that carries is exactly that hydraulic cylinder is adding
During load, the direction of suffered power is opposite with directional velocity；It is along load when direction is identical；
As shown in Fig. 2, it is hydraulic cylinder works four-quadrant schematic diagram in fatigue test loading procedure.Wherein, i-th, iii as
Hydraulic cylinder speed direction is limited with load force direction on the contrary, being inverse load；I-th i, iv quadrant velocity direction is identical with load force direction,
For along load.
For symmetrical hydraulic cylinder, two chamber hydraulic oil effect effective area is equal, results in and is moved through in hydraulic cylinder piston
Cheng Zhong, hydraulic cylinder flow into equal always with the flow flowed out；Since two chamber of hydraulic cylinder is full of the hydraulic oil of different pressures, so production
Loading force is given birth to；In hydraulic cylinder loading system, by the hydraulic fluid pressure of servo valve control hydraulic cylinder two chambers of height and then reality
Now to the control of loading force；
Asymmetrical load hydraulic cylinder, since two chamber effective area of hydraulic cylinder is equal, so loading force and high-low pressure chamber pressure difference into
Direct ratio；For valve control loading system, due to servo valve restriction characteristic, the sum of hydraulic cylinder height cavity pressure is consistently equal to system oil sources
Pressure；So system is carrying out fatigue test, loading instruction is sinusoidal loading time spectrum, when hydraulic cylinder is in inverse load operating mode, high pressure
Chamber volume increases, low pressure chamber volume reducing, and high-low pressure chamber does not change during this, and system high pressure oil enters high pressure at this time
Chamber, low pressure chamber low pressure oil enter fuel tank, and servo valve throttling action is smaller, and energy loss is relatively low；When hydraulic cylinder is in along load operating mode
When, high pressure chest volume reducing, low pressure chamber volume increase, at this time if system high pressure oil is entered low pressure after servo valve throttles
Chamber, if high pressure chest high pressure oil is also all returned directly to fuel tank after servo valve throttles, servo valve throttling action will be very
Substantially, energy utilization rate significantly reduces, and causes the very big waste of system energy, will can not neglect for full machine fatigue test of structure
Part energy slightly.In view of symmetrical hydraulic cylinder architectural characteristic, when hydraulic cylinder is in along operating mode is carried, due to two chamber sections
Product is equal, so high pressure chest hydraulic oil outflow flow is equal with low pressure chamber low pressure oil inflow flow；It is controlled by main servo valve
On the basis of hydraulic cylinder, increase secondary valve and check valve is carried out along the control carried under operating mode；Under along operating mode is carried, high pressure chest volume subtracts
Few, the increase of low pressure chamber volume by switching servo valve control, hydraulic cylinder with system high pressure oil sources is isolated, passes through secondary servo valve
Oil circuit directly controls hydraulic cylinder.
The present embodiment by analyzing symmetrical hydraulic cylinder in different operating quadrant high-low pressure cavity pressure and volume changing rule, if
A kind of loading actuator Hydraulic System Principle specifically for fatigue test is counted, the energy controlling tube scheme of optimization is proposed, to subtract
Restriction loss under few system difference loading condition；Energy is carried out using secondary servo valve oil circuit especially for when along load operating mode
Optimum utilization；Specific work process is：
Loading Control device sends control signal according to fatigue test load spectrum, while judges according to load condition and load
Spectrum judges that hydraulic cylinder loads working condition；When hydraulic cylinder is in inverse load working condition, Loading Control device closes secondary servo valve oil
Main servo valve oil road is opened on road；The high pressure oil that system has motor that pump is driven to generate at this time enters hydraulic cylinder by servo valve；Because
Hydraulic cylinder is in inverse load working condition, so system high pressure oil enters hydraulic cylinder high pressure after the certain throttling action of servo valve
Chamber；Low pressure chamber hydraulic oil outflows back to fuel tank after throttling by servo valve；
When hydraulic cylinder is in along working condition is carried, Loading Control device control main servo valve oil road is closed, and then by hydraulic pressure
Cylinder is isolated with the cut-out of system oil sources, opens simultaneously secondary servo valve oil circuit；Hydraulic cylinder is in along load working condition at this time, high pressure chest
High pressure oil flows out after servo valve (B to T) throttling, and it is low to be directly entered by check valve to flow back into servo valve (P to A)
Press chamber；In entire loading procedure, cylinder device is isolated with oil sources, completes loading, is avoided system high pressure oil and is passed through servo
Larger throttling action caused by valve directly supplements low pressure chamber using the high pressure oil of high pressure chest outflow, realizes the section of system capacity
About.
System of the present invention considers fatigue test load spectrum loading symmetry and symmetrical hydraulic cylinder along inverse current-carrying
Symmetry is measured, is composed in same load, is loaded using major-minor valve Discrete control hydraulic cylinder, it is smaller in system leak flow
In the case of, flow needed for system can save nearly 50%；In the entire loading cycle of fatigue test, very big save will be generated and imitated
It should.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to above-described embodiment
The present invention is described in detail, it will be understood by those of ordinary skill in the art that；It still can be to above-mentioned each implementation
Technical solution recorded in example modifies or carries out equivalent substitute to which part technical characteristic；And these modification or
It replaces, the essence of appropriate technical solution is not made to depart from the scope of various embodiments of the present invention technology.
Claims (2)
1. it is a kind of based on fatigue test along the loading actuating system of inverse load servo valve Discrete control, which is characterized in that the system
Including：Constant displacement pump, constant-seed motor, fuel tank, servo valve, hydraulic cylinder and valve control cylinder mode unit；The servo valve includes main servo
Valve and secondary servo valve；
The constant-seed motor drives constant displacement pump to rotate, and the high pressure oil in fuel tank is supplied hydraulic cylinder by servo valve；
The system selects different servo valves by control valve draining pressure cylinder unit according to different load conditions in fatigue test
Hydraulic cylinder is controlled；
The system also includes there is Loading Control device, the Loading Control device is used to judge the loading working condition of hydraulic cylinder, and
Control the opening and closing of main servo valve oil road and secondary servo valve oil circuit；
When hydraulic cylinder is in inverse load working condition, the secondary servo valve oil circuit of Loading Control device control is closed, and main servo valve oil road is beaten
It opens；
When hydraulic cylinder is in along working condition is carried, Loading Control device control main servo valve oil road is closed, so by hydraulic cylinder with
The cut-out isolation of system oil sources, opens simultaneously secondary servo valve oil circuit.
2. system according to claim 1, it is characterised in that：The system also includes there is accumulator, the accumulator is used
In storing the high pressure oil in fuel tank, after accumulator is full of high pressure oil, constant-seed motor stops operating, and accumulator will store before
High pressure oil hydraulic cylinder is supplied by servo valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610709191.8A CN106089820B (en) | 2016-08-23 | 2016-08-23 | A kind of structural test based on along inverse load Discrete control loads actuating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610709191.8A CN106089820B (en) | 2016-08-23 | 2016-08-23 | A kind of structural test based on along inverse load Discrete control loads actuating system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106089820A CN106089820A (en) | 2016-11-09 |
| CN106089820B true CN106089820B (en) | 2018-05-25 |
Family
ID=57224610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610709191.8A Active CN106089820B (en) | 2016-08-23 | 2016-08-23 | A kind of structural test based on along inverse load Discrete control loads actuating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106089820B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108561349B (en) * | 2018-07-13 | 2019-12-31 | 北京航空航天大学 | Controllable loading module with forward and backward load capacity control function |
| CN108680354A (en) * | 2018-07-19 | 2018-10-19 | 中国人民解放军陆军装甲兵学院 | Gear Fatigue Testing Loads loading device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202267609U (en) * | 2011-08-31 | 2012-06-06 | 中国商用飞机有限责任公司 | Aircraft landing gear loading system |
| CN104047927A (en) * | 2014-06-16 | 2014-09-17 | 中国飞机强度研究所 | Device and method for preventing overload of forward and reverse loading of servo actuator cylinder |
| CN203868019U (en) * | 2014-06-03 | 2014-10-08 | 烟台中宇航空液压有限公司 | Static loading protection module |
| CN104564915A (en) * | 2015-01-28 | 2015-04-29 | 太原理工大学 | Pump-valve composite two-degree-of-freedom electro-hydraulic motion loading control method |
| CN204512079U (en) * | 2015-01-28 | 2015-07-29 | 北京航空航天大学 | A kind of two remaining Electrical hydrostatic actuator |
| CN204942122U (en) * | 2015-08-20 | 2016-01-06 | 深圳市达丰科技有限公司 | Closed Hydraulic servo loading system, hydraulic pressure installation and loading equipemtn |
| CN105673621A (en) * | 2016-03-01 | 2016-06-15 | 浙江大学 | Multi-working-condition comprehensive simulation test system for reciprocating seal of aviation actuator |
-
2016
- 2016-08-23 CN CN201610709191.8A patent/CN106089820B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202267609U (en) * | 2011-08-31 | 2012-06-06 | 中国商用飞机有限责任公司 | Aircraft landing gear loading system |
| CN203868019U (en) * | 2014-06-03 | 2014-10-08 | 烟台中宇航空液压有限公司 | Static loading protection module |
| CN104047927A (en) * | 2014-06-16 | 2014-09-17 | 中国飞机强度研究所 | Device and method for preventing overload of forward and reverse loading of servo actuator cylinder |
| CN104564915A (en) * | 2015-01-28 | 2015-04-29 | 太原理工大学 | Pump-valve composite two-degree-of-freedom electro-hydraulic motion loading control method |
| CN204512079U (en) * | 2015-01-28 | 2015-07-29 | 北京航空航天大学 | A kind of two remaining Electrical hydrostatic actuator |
| CN204942122U (en) * | 2015-08-20 | 2016-01-06 | 深圳市达丰科技有限公司 | Closed Hydraulic servo loading system, hydraulic pressure installation and loading equipemtn |
| CN105673621A (en) * | 2016-03-01 | 2016-06-15 | 浙江大学 | Multi-working-condition comprehensive simulation test system for reciprocating seal of aviation actuator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106089820A (en) | 2016-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100424361C (en) | Closed electrohydraulic controlling system | |
| CN104728196B (en) | The Electrical hydrostatic actuator of load-sensitive | |
| CN103148041B (en) | The controlling method of two electro-hydraulic servo valve control systems of the main passive load of a kind of energy-saving type | |
| CN105156391A (en) | Composite variable pump and hydraulic control system using composite variable pump | |
| CN109779985A (en) | Gear pump control hydraulic control system of bender and its control method | |
| CN104047912B (en) | The digital pump controlled hydraulic differential cylinder in self-powered source | |
| CN108757624A (en) | A kind of oil cylinder overflow valve differential speed accelerating circuits | |
| CN106122188B (en) | Conventional overflow valve overflow loss recycle and reuse system based on hydraulic accumulator | |
| CN106089820B (en) | A kind of structural test based on along inverse load Discrete control loads actuating system | |
| CN108591144A (en) | The distributed direct of the double accumulators of the double constant displacement pumps of motor driving drives excavator hydraulic system | |
| CN108374696A (en) | Steamturbine valve drive | |
| CN208634118U (en) | The distributed direct of the double accumulators of the double constant displacement pumps of motor driven drives excavator hydraulic system | |
| BUSQUETS et al. | A Multi-Actuator Displacement-Controlled System with Pump Switching–A Study of the Architecture and Actuator-Level Control | |
| CN104132023B (en) | Controlled variable cross-section hydraulic cylinder and hydraulic control system thereof and control method | |
| CN103967869A (en) | Hydraulic cylinder loading detecting device | |
| CN109058186A (en) | A kind of electro-hydraulic execution control method of bi-motor | |
| CN206221419U (en) | A kind of oil circuit control to pilot operated valve device implements the locking loop of individually control | |
| Wu et al. | On the Design of Energy-Saving Fluid Power Converter | |
| CN205331095U (en) | Energy -saving hydraulic valve | |
| CN114704531A (en) | Hydraulic middle position floating integrated valve and hydraulic control system | |
| CN210531724U (en) | Motor and solenoid valve coordinated control system | |
| CN106735394A (en) | A kind of dual sided porous drilling hydraulic system of modular machine tool | |
| CN102588029A (en) | Method for measuring opening-closing time of variable valve actuator | |
| CN206129741U (en) | Gas cylinder fatigue test hydraulic system | |
| CN106678112B (en) | A kind of underwater cylinder control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |