CN201281050Y - Novel emergency protection arrangement for three-stage electrohydraulic servo valve - Google Patents
Novel emergency protection arrangement for three-stage electrohydraulic servo valve Download PDFInfo
- Publication number
- CN201281050Y CN201281050Y CNU2008200910011U CN200820091001U CN201281050Y CN 201281050 Y CN201281050 Y CN 201281050Y CN U2008200910011 U CNU2008200910011 U CN U2008200910011U CN 200820091001 U CN200820091001 U CN 200820091001U CN 201281050 Y CN201281050 Y CN 201281050Y
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- valve
- servo valve
- stage electrical
- electrical fluid
- fluid servo
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Abstract
The utility model provides a novel emergency protection device of a third-class electro hydraulic servo valve. The emergency protection device comprises a two-position four-way electromagnetic directional valve, a dual hydraulic-control stop valve, a floating sleeve, a piston, a piston rod, an adjusting bolt and a screw nut. The two-position four-way electromagnetic directional valve is arranged on a valve block which is used for installing the third-class electro hydraulic servo valve; the dual hydraulic-control stop valve is arranged between a pilot valve of the third-class electro hydraulic servo valve and a valve body, namely on the valve body; and the floating sleeve, the piston, the piston rod, the adjusting bolt and the screw nut are arranged on a right end cover of the third-class electro hydraulic servo valve. The novel emergency protection device has the characteristics that: the structure is simple, the realization is convenient and the performance is reliable; the protection is timely and the system safety can be greatly improved; and the protection device can be used in various large-sized equipment which utilize the third-class electro hydraulic servo valves, such as freedom motion simulators, vibration test stands and the like.
Description
(1) technical field
The utility model relates to servovalve emergency protection technology, when being specifically related to the fault of a kind of three-stage electrical fluid servo valve own or it control the Hydrauservo System fault time emergency protection.
(2) technical background
The contour performance equipment of six freedom-degree motion simulator, vibration mechine and load loader adopts three-stage electrical fluid servo valve control oil hydraulic cylinder to be used as the motivational drive part usually, realizes required function by the fore and aft motion of valve control oil hydraulic cylinder.When device fails, need emergency protecting equipment and finish error protection, make equipment be in safe position.
(3) summary of the invention
The purpose of this utility model is to provide a kind of system failure protection that is used for, and improves the three-stage electrical fluid servo valve novel emergency protective gear of security of system.
The purpose of this utility model is achieved in that it comprises two-position four-way solenoid directional control valve, double hydraulic control stop valve, floating bushing, piston, piston rod, adjustment screw bolt and nut, and the two-position four-way solenoid directional control valve is installed in the valve piece that is used to install three-stage electrical fluid servo valve; The double hydraulic control stop valve is installed between the pilot valve and valve body of three-stage electrical fluid servo valve, promptly on the valve body; Floating bushing, piston, piston rod, adjustment screw bolt and nut are installed on the right end cap of three-stage electrical fluid servo valve.
The utility model also has some technical characteristicss like this:
1, described two-position four-way solenoid directional control valve connects pilot valve, double hydraulic control stop valve, floating bushing, piston and the piston rod of three-stage electrical fluid servo valve respectively;
2, described piston is arranged in the outside step of three-stage electrical fluid servo valve right end cap, and piston and piston rod are integrated, and floating bushing is arranged on the piston rod;
3, described piston rod left end has a groove, and piston rod connects the three-stage electrical fluid servo valve spool by the left end groove;
4, the right-hand member of described three-stage electrical fluid servo valve spool is provided with n type hook, and piston rod is connected spool by the left end groove with n type hook;
5, described adjustment bolt passes the right end cap of three-stage electrical fluid servo valve, and it installs nut at the three-stage electrical fluid servo valve right end cap outside one end.
The utility model designed a kind of when being used for the fault of three-stage electrical fluid servo valve own or it control the Hydrauservo System fault time emergency protection mechanism, the safety protection when it can the realization system breaks down.The two-position four-way solenoid directional control valve had both been controlled the fuel feeding of pilot valve, controlled the double hydraulic control stop valve again, also controlled floating bushing, piston and piston rod; The two-position four-way solenoid directional control valve is a standard piece, is easy to buy reliable performance; Floating bushing, piston, piston rod, adjustment screw bolt and nut are installed on the right end cap of three-stage electrical fluid servo valve, and be simple in structure, volume is little, reliable working performance, when the double hydraulic control stop valve guarantees emergency protection about spool two control chambers cavitation phenomenon can not take place.
Under the normal condition, two-position four-way solenoid directional control valve energising, servovalve enables, and pressure oil is pulled to the oil-feed port of pilot valve, and piston and piston rod be to left movement simultaneously, touches the step of right end cap up to the piston left side and stop motion; Floating bushing moves right up to the contact upper piston and by dead.The motion in the certain limit on left and right directions of spool this moment is unrestricted, and pilot valve can be controlled the spool proper motion, and three-stage electrical fluid servo valve can proper functioning.When servovalve fault or system are in an emergency, the outage of two-position four-way solenoid directional control valve, the pilot valve oil-feed port communicates with fuel tank, piston, piston rod and floating bushing acting in conjunction simultaneously is fixed to a certain appropriate location with spool, and this position just makes the piston rod of oil hydraulic cylinder in the system get back to home with certain speed.
The utility model is simple in structure, and it is convenient to realize, reliable performance, and protection is timely, the Security that can improve system greatly.It can be used in many main equipments that use three-stage electrical fluid servo valve, as multifreedom motion simulator, vibration mechine etc.
(4) description of drawings
Hydraulic schematic diagram when Fig. 1 is the utility model emergency protecting equipment proper functioning;
Hydraulic schematic diagram when Fig. 2 is the utility model emergency protecting equipment emergency protection.
(5) embodiment
Below in conjunction with the drawings and specific embodiments the utility model is further described:
In conjunction with Fig. 1 and Fig. 2, three-stage electrical fluid servo valve and oil hydraulic cylinder comprise that left end cap 1, valve body 2, valve pocket 3, right-hand member have spool 4, right end cap 5, pilot valve 11, double hydraulic control stop valve 12, replaceable orifice plug 14, replaceable orifice plug 15, the replaceable orifice plug 16 of n type hook, the piston rod 17 of oil hydraulic cylinder; Be provided with spool left side control chamber I, the right control chamber II of spool, floating bushing left side control chamber III, the right control chamber IV of floating bushing (also being piston left side control chamber), the right control chamber V of piston, oil hydraulic cylinder left side control chamber VI, the right control chamber VII of oil hydraulic cylinder in the valve.Present embodiment comprises that two-position four-way solenoid directional control valve 10, double hydraulic control stop valve 12, floating bushing 6, piston 7, left end have piston rod 13 (annotate: piston 7 and piston rod 13 are one), adjustment bolt 8 and the nut 9 of a groove.Two-position four-way solenoid directional control valve 10 is installed in the valve piece that is used to install three-stage electrical fluid servo valve; Double hydraulic control stop valve 12 is installed between pilot valve 11 and the valve body 2, promptly on the valve body 2; Floating bushing 6, piston 7, piston rod 13, adjustment bolt 8 and nut 9 are installed on the right end cap of three-stage electrical fluid servo valve.
1, proper functioning
In conjunction with Fig. 1, two-position four-way solenoid directional control valve 10 when electric, the oil-feed port of pilot valve (P1 mouth) leads to pressure oil; Double hydraulic control stop valve 12 is by making all obstructed fuel tank of two control chambers about spool; Simultaneously pressure oil enters III chamber and V chamber, and the IV chamber leads to fuel tank, and piston and piston rod be to left movement, touches the step of right end cap up to the piston left side and stop motion; Floating bushing moves right up to the contact upper piston and by dead.Groove is at the meta of n type hook at this moment, and also gapped between n type hook and the floating bushing, so spool motion in the certain limit on left and right directions is unrestricted, pilot valve can be controlled the spool proper motion.
2, emergency protection
In conjunction with Fig. 2, during 10 outages of two-position four-way solenoid directional control valve, the oil-feed port of pilot valve (P1 mouth) leads to fuel tank; Double hydraulic control stop valve 12 is opened and is made that two control chambers all lead to fuel tank about spool; The A mouth leads to high pressure, the B mouth leads to fuel tank, just pressure oil enters the IV chamber, and the logical fuel tank in III chamber and V chamber, piston and piston rod move right, floating bushing is to left movement, final piston right side touches the adjustment bolt and can not move, the left groove of floating bushing and piston rod is firmly embraced spool by n type hook and is fixed on some positions (when this position, spool and valve pocket have certain opening), this position is that piston moves right the position that touches when adjusting bolt, just can change the position that spool finally is fixed so change the position of adjusting bolt, can change the size of spool and valve pocket opening.
The position of spool is fixed; controlled by pilot valve; spool and valve pocket have certain opening; pressure oil enters oil hydraulic cylinder left side control chamber (VI) from B1; the right control chamber of oil hydraulic cylinder (VII) is by the logical fuel tank of A1 simultaneously; so just make the piston rod 17 of oil hydraulic cylinder move to home, thereby play the emergency protection effect with certain speed.
When piston rod hauled spool and moves right, double hydraulic control stop valve 12 was opened and is made that two control chambers all lead to fuel tank about spool, thereby prevents that two control chambers produce cavitation phenomenon about spool.
Replaceable orifice plug is used to regulate the speed of emergency protection.
Claims (6)
1, a kind of three-stage electrical fluid servo valve novel emergency protective gear, it is characterized in that it comprises two-position four-way solenoid directional control valve, double hydraulic control stop valve, floating bushing, piston, piston rod, adjustment screw bolt and nut, the two-position four-way solenoid directional control valve is installed in the valve piece that is used to install three-stage electrical fluid servo valve; The double hydraulic control stop valve is installed between the pilot valve and valve body of three-stage electrical fluid servo valve, promptly on the valve body; Floating bushing, piston, piston rod, adjustment screw bolt and nut are installed on the right end cap of three-stage electrical fluid servo valve.
2, three-stage electrical fluid servo valve novel emergency protective gear according to claim 1 is characterized in that described two-position four-way solenoid directional control valve connects the pilot valve of three-stage electrical fluid servo valve, double hydraulic control stop valve, floating bushing, piston and piston rod respectively.
3, three-stage electrical fluid servo valve novel emergency protective gear according to claim 2 is characterized in that described piston is arranged in the outside step of three-stage electrical fluid servo valve right end cap, and piston and piston rod are integrated, and floating bushing is arranged on the piston rod.
4, three-stage electrical fluid servo valve novel emergency protective gear according to claim 3 is characterized in that described piston rod left end has a groove, and piston rod connects the three-stage electrical fluid servo valve spool by the left end groove.
5, three-stage electrical fluid servo valve novel emergency protective gear according to claim 4 is characterized in that the right-hand member of described three-stage electrical fluid servo valve spool is provided with n type hook, and piston rod is connected spool by the left end groove with n type hook.
6, three-stage electrical fluid servo valve novel emergency protective gear according to claim 5 is characterized in that described adjustment bolt passes the right end cap of three-stage electrical fluid servo valve, and it installs nut at the three-stage electrical fluid servo valve right end cap outside one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200910011U CN201281050Y (en) | 2008-09-28 | 2008-09-28 | Novel emergency protection arrangement for three-stage electrohydraulic servo valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200910011U CN201281050Y (en) | 2008-09-28 | 2008-09-28 | Novel emergency protection arrangement for three-stage electrohydraulic servo valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201281050Y true CN201281050Y (en) | 2009-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200910011U Expired - Fee Related CN201281050Y (en) | 2008-09-28 | 2008-09-28 | Novel emergency protection arrangement for three-stage electrohydraulic servo valve |
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| CN (1) | CN201281050Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244155A (en) * | 2013-05-23 | 2013-08-14 | 北京天地玛珂电液控制***有限公司 | Hydraulic cylinder control valve without unloading impact resonance |
| CN104533885A (en) * | 2014-12-30 | 2015-04-22 | 天津福云天翼科技有限公司 | High-speed switch valve |
| CN105156404A (en) * | 2015-09-21 | 2015-12-16 | 北京精密机电控制设备研究所 | Hydraulic system dynamic correction device capable of effectively inhibiting load resonance |
| CN109989956A (en) * | 2019-03-27 | 2019-07-09 | 银川市长城液压有限责任公司 | A kind of hydraulic valve and hydraulic system |
| CN115978234A (en) * | 2023-01-05 | 2023-04-18 | 宁波克泰液压有限公司 | Throttle type three-position five-way electromagnetic valve |
-
2008
- 2008-09-28 CN CNU2008200910011U patent/CN201281050Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244155A (en) * | 2013-05-23 | 2013-08-14 | 北京天地玛珂电液控制***有限公司 | Hydraulic cylinder control valve without unloading impact resonance |
| CN103244155B (en) * | 2013-05-23 | 2015-07-29 | 北京天地玛珂电液控制***有限公司 | A kind of hydraulic cylinder control valve impacting resonance without unloading |
| CN104533885A (en) * | 2014-12-30 | 2015-04-22 | 天津福云天翼科技有限公司 | High-speed switch valve |
| CN105156404A (en) * | 2015-09-21 | 2015-12-16 | 北京精密机电控制设备研究所 | Hydraulic system dynamic correction device capable of effectively inhibiting load resonance |
| CN105156404B (en) * | 2015-09-21 | 2017-05-10 | 北京精密机电控制设备研究所 | Hydraulic system dynamic correction device capable of effectively inhibiting load resonance |
| CN109989956A (en) * | 2019-03-27 | 2019-07-09 | 银川市长城液压有限责任公司 | A kind of hydraulic valve and hydraulic system |
| CN109989956B (en) * | 2019-03-27 | 2024-03-22 | 银川市长城液压有限责任公司 | Hydraulic valve and hydraulic system |
| CN115978234A (en) * | 2023-01-05 | 2023-04-18 | 宁波克泰液压有限公司 | Throttle type three-position five-way electromagnetic valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090729 Termination date: 20091028 |