CN104141652A - Hydraulic loading equipment fault protecting device - Google Patents
Hydraulic loading equipment fault protecting device Download PDFInfo
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- CN104141652A CN104141652A CN201310170129.2A CN201310170129A CN104141652A CN 104141652 A CN104141652 A CN 104141652A CN 201310170129 A CN201310170129 A CN 201310170129A CN 104141652 A CN104141652 A CN 104141652A
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Abstract
The invention belongs to the hydraulic loading technology and relates to a hydraulic loading equipment fault protecting device. The hydraulic loading equipment fault protecting device comprises a pilot control module, a main oil passage module, a bypass flow rate module and an oil return system, wherein the main oil passage module is used for communicating a high-pressure oil passage with an actuating cylinder, the bypass flow rate module is communicated with the oil return system, and the pilot control module is connected with hydraulic control one-way valves on the main oil passage module and the bypass flow rate module to control the open and close of an oil passage. The hydraulic loading equipment fault protecting device solves the problem that the actuating cylinder is protected suddenly due to external reasons and protects a test piece from the damage of hydraulic impact; the hydraulic loading equipment fault protecting device enables the system cleanness to be improved and is capable of guaranteeing the stable running of the system for long time and prolonging the service life of elements.
Description
Technical field
The invention belongs to hydraulic loaded technology, relate to a kind of hydraulic loaded equipment failure protective gear.
Background technique
In complete aircraft structural static/fatigue test process, because test operation person's error or external equipment reason cause test mass to exceed the problem such as error limitation, compression shock, the situation that causes test to stop, protecting happens occasionally.Especially compression shock may produce secondary injury to testpieces, and test reliability, stability are brought to very large impact.
Existing error protection module need to be had nothing in common with each other according to industry, and what in simple system, have often just achieves the goal by servovalve Median Function.This method tends to produce error, control accuracy is low, because servovalve meta always has skew, and after release, pressure oil does not have passage to return system, easily produces the unfavorable factor such as build the pressure.
Summary of the invention
The object of the invention is: providing a kind of can carry out the effectively hydraulic loaded equipment failure protective gear of protection to testpieces in uninstall process.
Technological scheme of the present invention is: a kind of hydraulic loaded equipment failure protective gear; it comprises pilot control module, working connection module, bypass flow module, oil return system; wherein; working connection module is used for being communicated with high-pressure oil passage and pressurized strut; bypass flow module is communicated with oil return system; and described pilot control module is all connected with the Pilot operated check valve in working connection module and bypass flow module, for the break-make of oil circuit control.
Described pilot control module is made up of two four-way electromagnetic reversing valves, Pilot operated check valves, wherein, in the absence of control signal, high pressure oil and pressurized strut draw, press chamber in isolation, first enter two-position four-way solenoid directional control valve by high voltage precision oil purifier; Have in the situation of control signal, high pressure oil backs down Pilot operated check valve self-locking dish semi-annular jade pendant by selector valve and opens it; Now, to servovalve output control signal, control high pressure oil enters pressurized strut and draws or press chamber, and electricity-liquid mechanism has just formed the protection of system first layer thus.
Described working connection module is made up of high voltage precision oil screen, electrohydraulic control.
Described bypass flow control module is made up of position control valve assembly, one-way throttle valve, and wherein, the normal situation guide's fluid of system is closed position control valve group, and oil return is by working connection oil sump tank; When in the situation that system surprisingly stops, position control valve group is opened, and fluid just can be got back to fuel tank by one-way throttle valve, closes throttle valve and remains unchanged with start tubular state before ensureing system protection, for testpieces provides safely effective protection.
Described hydraulic loaded equipment failure protective gear comprises high voltage precision oil purifier, solenoid directional control valve, one-way throttle valve, position control valve assembly, hydraulic control valve assembly, electrohydraulic control and for combining the valve body that above-mentioned components and parts are installed.
Technique effect of the present invention is: two four-way electromagnetic controls of the present invention enter the high pressure oil of hydraulic lock (being Pilot operated check valve), can not make high pressure oil directly enter in pressurized strut, can effectively prevent that the situation of unexpected pressurization pressurized strut motion suddenly from occurring.High pressure oil only has in the situation of considering by high pressure oil, just can enter control valve, module, pressurized strut inside, ensures the requirement of fluid granularity.And in stress-relief process, can provide two selections, one, making load get back to rapidly system by opening bypass flow valve without protecting a year situation for requirement, makes internal system pressure back to zero; Its two occasion of carrying needs guarantor can make system pressure keep the force value before release, such as high-altitude pressurized strut can not fallen suddenly in release, and can play a cushioning effect by inner Pilot operated check valve the pressure change in the situation that, can reduce the impact in change procedure.In sum, hydraulic loaded equipment failure protective gear of the present invention has solved answers external cause to cause the pressurized strut situation of protection suddenly, makes testpieces avoid hydraulic shock injury; Raising system turbidity test, can ensure that system smooth running extends element working life for a long time.
Brief description of the drawings
Fig. 1 is hydraulic loaded equipment failure protective gear principle schematic of the present invention;
Fig. 2 is the structural representation of hydraulic loaded equipment failure protective gear of the present invention one embodiment;
Fig. 3 is valve body structure schematic diagram of the present invention;
Fig. 4 is the plan view of valve body;
Fig. 5 is that the A-A of Fig. 4 cuts open figure,
Wherein, 1-pilot control module, 2-working connection module, 3-bypass flow module, 4-oil return system, 5-hydraulic control valve assembly, 6-electrohydraulic control, 7-valve body, 8-dish semi-annular jade pendant, 9-spool, 11-high voltage precision oil purifier, 12-two-position four-way solenoid directional control valve, 13-one-way throttle valve, 14-position control valve assembly.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described further:
Refer to Fig. 1, it is the principle schematic of hydraulic loaded equipment failure protective gear of the present invention.Hydraulic loaded equipment failure protective gear of the present invention is made up of pilot control module 1, working connection module 2, bypass flow module 3, oil return system 4.Working connection module is used for being communicated with high-pressure oil passage and pressurized strut, and bypass flow module is communicated with oil return system, and described pilot control module is all connected with the Pilot operated check valve in working connection module and bypass flow module, for the break-make of oil circuit control.
Wherein, pilot control module is made up of two four-way electromagnetic reversing valves, Pilot operated check valves.In the absence of control signal, high pressure oil and pressurized strut draw, press chamber in isolation.First enter two-position four-way solenoid directional control valve by high voltage precision oil purifier, have in the situation of control signal, high pressure oil backs down Pilot operated check valve self-locking dish semi-annular jade pendant by selector valve and opens it; Now, to servovalve output control signal, control high pressure oil enters pressurized strut and draws or press chamber, and electricity-liquid mechanism has just formed the protection of system first layer thus.Anti-locking system, under high pressure conditions, because of equipment failure or operator's error, causes that the situations such as hydraulic shock occur.
Working connection module is made up of high voltage precision oil screen, electrohydraulic control.Major control test loading accuracy and direction.Wherein, when high voltage precision oil is considered guarantee flow system flow, also control oil cleanliness, prevent that diameter is greater than the situations such as the 3 μ m particulate matter systems of entering cause that precision element clamping stagnation, pressurized strut are pulled and occurs, guarantee system is moved reliably and with long-term; Servo valve control improves a lot manual control accuracy aspect than before, and can realize telecontrol, improves largely working environment.
Bypass flow control module is made up of position control valve assembly, one-way throttle valve.The normal situation guide's fluid of system is closed position control valve group, and oil return is by working connection oil sump tank; When in the situation that system surprisingly stops, position control valve group is opened, and fluid just can be got back to fuel tank by one-way throttle valve, closes throttle valve and just can ensure that the front start tubular state of system protection remains unchanged, for testpieces provides safely effective protection.
Refer to Fig. 2, it is the structural representation of hydraulic loaded equipment failure protective gear of the present invention one embodiment.Described hydraulic loaded equipment failure protective gear comprise high voltage precision oil purifier 11, two-position four-way solenoid directional control valve 12, one-way throttle valve 13, position control valve assembly 14, hydraulic control valve assembly 5, electrohydraulic control 6, valve body 7.
Refer to Fig. 3, Fig. 4 and Fig. 5, it is the structural representation of valve body, and described valve body is provided with the mounting hole matching with above-mentioned each components and parts, and each components and parts are combined by valve body.
When hydraulic loaded equipment failure protective gear real work of the present invention, first by module connecting system, high pressure oil enters two-position four-way solenoid directional control valve 12 by high voltage precision oil purifier 1, has in the situation of control signal high pressure oil enter in hydraulic control valve assembly 5 and backs down dish semi-annular jade pendant 8, opens spool 9; Realize the load output to pressurized strut (servovalve is a 3-position 4-way electro-hydraulic control valve, can make high pressure oil enter pressurized strut draw or press chamber by transposition) by telecontrol electrohydraulic control 6.In the time of two-position four-way solenoid directional control valve 12 signal out of hand, hydraulic control valve assembly 5 is closed automatically under the effect of dish semi-annular jade pendant 8, the A of actuator A, B chamber and electrohydraulic control 6, B load window clipping, pressurized strut is in the lock state, can make the load value of the actual output of pressurized strut not follow, system oil pressure and control command change and change.Prevent from disconnecting suddenly in the situation of elastic cable paper, pressurized strut is out of control etc., and situation occurs.
In the normal situation of system, guide's fluid is closed position control valve assembly 14, and oil return, by servovalve return opening, is flowed back to fuel tank; When in the situation of system protection, position control valve assembly 14 is opened, and fluid just can be got back to fuel tank by one-way throttle valve 13, opens one-way throttle valve 13 and just can ensure that system fast discharging reduces local assault, for testpieces provides safely effective protection.
Claims (5)
1. a hydraulic loaded equipment failure protective gear; it is characterized in that; comprise pilot control module, working connection module, bypass flow module, oil return system; wherein; working connection module is used for being communicated with high-pressure oil passage and pressurized strut; bypass flow module is communicated with oil return system, and described pilot control module is all connected with the Pilot operated check valve in working connection module and bypass flow module, for the break-make of oil circuit control.
2. hydraulic loaded equipment failure protective gear according to claim 1, it is characterized in that, described pilot control module is made up of two four-way electromagnetic reversing valves, Pilot operated check valves, wherein, in the absence of control signal, high pressure oil and pressurized strut draw, press chamber in isolation, first enter two-position four-way solenoid directional control valve by high voltage precision oil purifier; Have in the situation of control signal, high pressure oil backs down Pilot operated check valve self-locking dish semi-annular jade pendant by selector valve and opens it; Now, to servovalve output control signal, control high pressure oil enters pressurized strut and draws or press chamber, and electricity-liquid mechanism has just formed the protection of system first layer thus.
3. hydraulic loaded equipment failure protective gear according to claim 1, is characterized in that, described working connection module is made up of high voltage precision oil screen, electrohydraulic control.
4. hydraulic loaded equipment failure protective gear according to claim 1, it is characterized in that, described bypass flow control module is made up of position control valve assembly, one-way throttle valve, wherein, the normal situation guide's fluid of system is closed position control valve group, and oil return is by working connection oil sump tank; When in the situation that system surprisingly stops, position control valve group is opened, and fluid just can be got back to fuel tank by one-way throttle valve, closes throttle valve and remains unchanged with start tubular state before ensureing system protection, for testpieces provides safely effective protection.
5. hydraulic loaded equipment failure protective gear according to claim 1; it is characterized in that, comprise high voltage precision oil purifier, solenoid directional control valve, one-way throttle valve, position control valve assembly, hydraulic control valve assembly, electrohydraulic control and for combining the valve body that above-mentioned components and parts are installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310170129.2A CN104141652A (en) | 2013-05-10 | 2013-05-10 | Hydraulic loading equipment fault protecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310170129.2A CN104141652A (en) | 2013-05-10 | 2013-05-10 | Hydraulic loading equipment fault protecting device |
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| Publication Number | Publication Date |
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| CN104141652A true CN104141652A (en) | 2014-11-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310170129.2A Pending CN104141652A (en) | 2013-05-10 | 2013-05-10 | Hydraulic loading equipment fault protecting device |
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| CN (1) | CN104141652A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869377A (en) * | 2017-12-01 | 2019-06-11 | 中国飞机强度研究所 | A kind of controllable uninstalling system |
| CN110244602A (en) * | 2019-05-27 | 2019-09-17 | 中国飞机强度研究所 | A kind of portable pressurized strut open/close control device |
| CN110364989A (en) * | 2019-06-26 | 2019-10-22 | 中国飞机强度研究所 | A kind of double control safety protective circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1975806A (en) * | 2006-12-13 | 2007-06-06 | 哈尔滨工业大学 | Six freedom motion simulator trouble protector and withdrawing device |
| CN101210581A (en) * | 2006-12-28 | 2008-07-02 | 中国国际海运集装箱(集团)股份有限公司 | Self-reducing resisting hydraulic cylinder |
| CN102410283A (en) * | 2011-10-19 | 2012-04-11 | 无锡市海航电液伺服系统有限公司 | Hydraulic protection modular structure of servo actuator |
-
2013
- 2013-05-10 CN CN201310170129.2A patent/CN104141652A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1975806A (en) * | 2006-12-13 | 2007-06-06 | 哈尔滨工业大学 | Six freedom motion simulator trouble protector and withdrawing device |
| CN101210581A (en) * | 2006-12-28 | 2008-07-02 | 中国国际海运集装箱(集团)股份有限公司 | Self-reducing resisting hydraulic cylinder |
| CN102410283A (en) * | 2011-10-19 | 2012-04-11 | 无锡市海航电液伺服系统有限公司 | Hydraulic protection modular structure of servo actuator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869377A (en) * | 2017-12-01 | 2019-06-11 | 中国飞机强度研究所 | A kind of controllable uninstalling system |
| CN110244602A (en) * | 2019-05-27 | 2019-09-17 | 中国飞机强度研究所 | A kind of portable pressurized strut open/close control device |
| CN110364989A (en) * | 2019-06-26 | 2019-10-22 | 中国飞机强度研究所 | A kind of double control safety protective circuit |
| CN110364989B (en) * | 2019-06-26 | 2021-09-03 | 中国飞机强度研究所 | Dual-control safety protection circuit |
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| PB01 | Publication | ||
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Application publication date: 20141112 |