CN202182074U - High-flow jet pipe type secondary electro-hydraulic servo valve - Google Patents
High-flow jet pipe type secondary electro-hydraulic servo valve Download PDFInfo
- Publication number
- CN202182074U CN202182074U CN2011200390733U CN201120039073U CN202182074U CN 202182074 U CN202182074 U CN 202182074U CN 2011200390733 U CN2011200390733 U CN 2011200390733U CN 201120039073 U CN201120039073 U CN 201120039073U CN 202182074 U CN202182074 U CN 202182074U
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- jet pipe
- spool
- valve
- torque motor
- prestage
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Abstract
The utility model relates to a high-flow jet pipe type secondary electro-hydraulic servo valve, comprising a power level slide valve and a prestage torque motor, wherein the power level slide valve comprises a valve body, a valve core, a valve sleeve and a reception distributor, wherein a reception hole is arranged on the reception distributor, the reception hole is connected with the two ends of the valve core through a cavity, a jet pipe is arranged in the middle of the prestage torque motor, the front end of the jet pipe is arranged above the reception hole, the rear end of the jet pipe is connected with an oil supplying cavity through a cavity, the two ends of the valve core are respectively provided with a shaft sleeve, and a feedback rod component is arranged between the jet pipe and the valve core. The high-flow jet pipe type secondary electro-hydraulic servo valve has the characteristics of strong contamination resistance, stable performance, high reliability and long service life and has stable static output characteristic and higher dynamic index.
Description
Technical field
The utility model relates to a kind of large-flow jet cast secondary electrohydraulic control in the electrohydraulic servo-controlling system.
Background technique
Jet cast electrohydraulic control has the advantage that strong, the stable and reliable for performance property of contamination resistance is high, the life-span is long; Be widely used in each electrohydraulic servo system; The design theory of jet cast electrohydraulic control is still immature at present, generally adopts method development the type servovalve of test both at home and abroad.
China starts late in jet cast electrohydraulic control development field, and present stage has only small flow (below the 100L/min) secondary valve development to obtain success, can produce the product of stable performance.And big flow (the present domestic matured product that does not also have stable performance of 150～200L/min) jet cast secondary electrohydraulic controls, genus blank.
The model utility content
Its purpose of the utility model just is to provide a kind of large-flow jet cast secondary electrohydraulic control; Have the advantages that strong, the stable and reliable for performance property of contamination resistance is high, the life-span is long; Under rated differential head 21MPa; Flow is the large-flow jet cast secondary electrohydraulic control of 200L/min, and has stable static output characteristic and higher dynamic indicator.
The technological scheme that realizes above-mentioned purpose and take; Comprise power stage guiding valve, prestage torque motor, described power stage guiding valve comprises valve body, spool, valve pocket and accepts distributor, accepts distributor and be provided with receiving orifice; Described receiving orifice connects the spool two ends through cavity; Described prestage torque motor middle part is provided with jet pipe, and the jet pipe front end is positioned at the receiving orifice top, and the jet pipe rear end connects fuel supply chamber through cavity; Described spool two ends respectively are provided with an axle sleeve, are provided with the feedback rod assembly between described jet pipe and the spool.
Compared with prior art, the beneficial effect of the utility model is,
Owing to adopted the spool two ends respectively to be provided with the structural design that is provided with the feedback rod assembly between an axle sleeve, jet pipe and the spool; Thereby have the advantages that strong, the stable and reliable for performance property of contamination resistance is high, the life-span is long; Under rated differential head 21MPa; Flow is the large-flow jet cast secondary electrohydraulic control of 200L/min, and has stable static output characteristic and higher dynamic indicator.
Description of drawings
Below in conjunction with accompanying drawing the utility model is done further to detail.
Fig. 1 is the working principle schematic representation of the utility model.
Fig. 2 is the structural representation of the power stage guiding valve of the utility model.
Fig. 3 is the structural representation of the torque motor of the utility model.
Fig. 4 is the feedback rod modular construction schematic representation of the utility model.
Fig. 5 is Fig. 4 side view.
Embodiment
The utility model comprises power stage guiding valve, prestage torque motor; As shown in Figure 1, described power stage guiding valve comprises valve body 9, spool 7, valve pocket 11 and accepts distributor, accepts distributor and is provided with receiving orifice 1; Described receiving orifice 1 connects spool 7 two ends through cavity; Described prestage torque motor middle part is provided with jet pipe 4, and jet pipe 4 front ends are positioned at receiving orifice 1 top, and jet pipe 4 rear ends connect fuel supply chamber through cavity; Described spool 7 two ends respectively are provided with an axle sleeve 10, are provided with the feedback rod assembly between described jet pipe 4 and the spool 7.
Described axle sleeve 10 cylindricals and valve pocket 11 match grindings, axle sleeve 10 endoporus and spool 7 match grindings, both matching gaps are in 0.003～0.006mm; The endoporus of axle sleeve 10 and cylindrical cylindricity are not more than φ 0.002mm, and both coaxalitys are not more than φ 0.003mm.
Described prestage torque motor comprises housing 12, permanent-magnet steel 15, armature component 2, magnet case 13, coil 3, bourdon tube 14, jet pipe 4 and nozzle 5; As shown in Figure 3, two permanent-magnet steels 15 produce polar flux, and the armature two ends are stretched in the air gap of flux circuit; Bourdon tube 14 1 ends are pressed together on the housing 12; The other end and armature component 2 press together, and jet pipe 4 upper ends and bourdon tube 14 press together, lower end dress nozzle 5; Magnitude of interference between described each pressing surface is controlled within 0.009～0.012mm, adopts spot welding to be connected between permanent-magnet steel 15 and the housing 12.
Described feedback rod assembly lower end is fixed in the middle of the spool 7, and the upper end is fixed on the jet pipe 4, and described feedback rod assembly adds the power F of 0.49N, and tip displacement is 1.2mm ± 0.05mm, and is as shown in Figure 4.
Be provided with oil filter 8 between described fuel supply chamber and the jet pipe 4.
The utility model solves the technological scheme that its technical problem adopted and comprises:
1, power stage guiding valve main valve housing two ends respectively increase by an axle sleeve;
2, the prestage torque motor produces polar flux by two permanent-magnet steels; The armature two ends are stretched in the air gap of flux circuit; Bourdon tube one end is pressed together on the housing, and the other end and armature component press together, and the jet pipe upper end presses together with bourdon tube; The lower end is adorned nozzle and is not had approximately, makes torque motor obtain reasonable integral stiffness.
3, with the feedback rod assembly as the force feedback element between power stage and the prestage, and make feedback rod that rational power placement property arranged.
The key technical indexes of the utility model:
Coil resistance: 1000 ± 100 Ω
Insulation resistance:＞50M Ω
Fuel feeding is withstand voltage: 31.5MPa
Oil return is withstand voltage: 21.0MPa
Rated flow: 200L/min ± 10% (△ P=21MPa)
The linearity :≤7.5%
Degree of symmetry :≤10%
Ring stagnates :≤5%
Quiet consumption flow :≤0.45+3%Qn
Resolution :≤0.2%
Pressure gain: >=30% △ P/1%In
Zero partially :≤2%
Frequency characteristic: >=35Hz
Working principle (as shown in Figure 1):
High pressure oil passes through oil filter 8 and fixed orifice from fuel supply chamber Ps continuously, sprays to two receiving orifices of Receiver 1 to jet pipe 4 nozzles 5, and receiving orifice 1 communicates with spool 7 two ends control chambers respectively.When input current was zero, the pressure oil flow of two receiving orifice 1 acceptance equated that the pressure at spool 7 two ends is identical, and spool 7 remains on the neutral position, and valve is output not.
When to torque motor coil block input control electric current, because the interaction of control magnetic flux and polar flux produces a control moment on armature; This moment makes armature component deflection; Drive bourdon tube deflection, make the jet pipe nozzle oscillation, cause spool two ends control chamber to produce pressure reduction; Cause spool travel, thus delivery pressure and flow.The output flow of servovalve is directly proportional with the instruction electrical signal of input.
As shown in Figure 2, the power stage guiding valve mainly by spool 7, valve pocket 11, valve body 9, accept distributor and form.Main valve housing 11 two ends respectively increase by an axle sleeve 10, to reduce the acting surface of spool 7 two ends volumes and control oil.Reduce spool 7 two ends volumes, can improve the speed of response of spool 7, the dynamic performance of valve is greatly improved; Reduce to control the acting surface of oil, suitably reduce to control the thrust of oil, improve near the stability of valve zero district spool 7.Require during enforcement: axle sleeve 10 cylindricals and valve pocket 11 match grindings, endoporus and spool 7 match grindings, technology assurance and both matching gaps are in 0.003～0.006mm; The endoporus of axle sleeve 10 and cylindrical cylindricity are controlled in the φ 0.002mm, and both coaxalitys are controlled in the φ 0.003mm.So promptly guaranteed the clearance seal of axle sleeve 10, can make spool 7 motions not receive superfluous constraint again with spool 7.
As shown in Figure 3, torque motor mainly is made up of housing 12, permanent-magnet steel 15, armature component 2, magnet case 13, coil 3, bourdon tube 14, jet pipe 4, nozzle 5.Two permanent-magnet steels 15 produce polar flux; Armature 2 two ends are stretched in the air gap of flux circuit, and bourdon tube 14 1 ends are pressed together on the housing 12, and the other end and armature component 2 press together; Jet pipe 4 upper ends and bourdon tube 14 press together, and the lower end is adorned nozzle 5 and do not had approximately.When this programme is implemented, guarantee that the magnitude of interference between each pressing surface is controlled within 0.009～0.012mm, adopt spot welding to be connected between permanent-magnet steel 15 and the housing 12.So promptly reliable connection the between each part, can not produce bigger distortional stress again, make torque motor obtain to stablize rational mechanical stiffness.Stablize rational mechanical stiffness and make torque motor that bigger pendulum angle and very little hysteresis arranged under the same instructions signal, improved the static output characteristic of valve.
As shown in Figure 4, the lower end is fixed in the middle of the main valve plug 7 during the work of feedback rod assembly, and the upper end is fixed on the jet pipe 4, is the force feedback part between prestage torque motor and the power stage guiding valve.The feedback rod assembly is the important component part that guarantees the linear stable output of valve in the utility model, has obtained specific force-displacement behavior, has greatly improved the static output characteristic of valve.The force-displacement behavior of feedback rod is: A end is fixing, adds the power F of 0.49N by direction as shown, guarantees that the B end movement is 1.2mm ± 0.05mm.Realize its force-displacement behavior through choosing of feedback rod material in the utility model with the proper heat treatment method.
Claims (5)
1. large-flow jet cast secondary electrohydraulic control; Comprise power stage guiding valve, prestage torque motor; It is characterized in that described power stage guiding valve comprises valve body (9), spool (7), valve pocket (11) and accepts distributor, accepts distributor and is provided with receiving orifice (1); Described receiving orifice (1) connects spool (7) two ends through cavity; Described prestage torque motor middle part is provided with jet pipe (4), and jet pipe (4) front end is positioned at receiving orifice (1) top, and jet pipe (4) rear end connects fuel supply chamber through cavity; Described spool (7) two ends respectively are provided with an axle sleeve (10), are provided with the feedback rod assembly between described jet pipe (4) and the spool (7).
2. the described a kind of large-flow jet cast secondary electrohydraulic control of root a tree name claim 1; It is characterized in that; Described axle sleeve (10) cylindrical and valve pocket (11) match grinding, axle sleeve (10) endoporus and spool (7) match grinding, both matching gaps are in 0.003～0.006mm; The endoporus and the cylindrical cylindricity of axle sleeve (10) are not more than φ 0.002mm, and both coaxalitys are not more than φ 0.003mm.
3. the described a kind of large-flow jet cast secondary electrohydraulic control of root a tree name claim 1; It is characterized in that; Described prestage torque motor comprises housing (12), permanent-magnet steel (15), armature component (2), magnet case (13), coil (3), bourdon tube (14), jet pipe (4) and nozzle (5), and two permanent-magnet steels (15) produce polar flux, and the armature two ends are stretched in the air gap of flux circuit; Bourdon tube (14) one ends are pressed together on the housing (12); The other end and armature component (2) press together, and jet pipe (4) upper end presses together with bourdon tube (14), lower end dress nozzle (5); Magnitude of interference between described each pressing surface is controlled within 0.009～0.012mm, adopts spot welding to be connected between permanent-magnet steel (15) and the housing (12).
4. the described a kind of large-flow jet cast secondary electrohydraulic control of root a tree name claim 1; It is characterized in that; Described feedback rod assembly lower end is fixed in the middle of the spool (7); The upper end is fixed on the jet pipe (4), and described feedback rod assembly adds the power F of 0.49N, and tip displacement is 1.2mm ± 0.05mm.
5. the described a kind of large-flow jet cast secondary electrohydraulic control of root a tree name claim 1 is characterized in that, is provided with oil filter (8) between described fuel supply chamber and the jet pipe (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200390733U CN202182074U (en) | 2011-02-15 | 2011-02-15 | High-flow jet pipe type secondary electro-hydraulic servo valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200390733U CN202182074U (en) | 2011-02-15 | 2011-02-15 | High-flow jet pipe type secondary electro-hydraulic servo valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202182074U true CN202182074U (en) | 2012-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200390733U Expired - Lifetime CN202182074U (en) | 2011-02-15 | 2011-02-15 | High-flow jet pipe type secondary electro-hydraulic servo valve |
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| CN (1) | CN202182074U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194898A (en) * | 2016-07-08 | 2016-12-07 | 同济大学 | A kind of jet pipe servo valve nozzle and the receiver hole centering method of inspection |
| CN106640804A (en) * | 2015-10-30 | 2017-05-10 | 北京精密机电控制设备研究所 | Pre-stage split press-fit type jet pipe servo valve |
| CN107435667A (en) * | 2017-08-10 | 2017-12-05 | 燕山大学 | Piezoelectric ceramic driven jet pipe electrohydraulic servo valve |
| CN107588052A (en) * | 2017-10-17 | 2018-01-16 | 上海衡拓液压控制技术有限公司 | Valve element built-in piston formula big flow force feedback jet pipe two-stage electrohydraulic servo valve |
| CN107993789A (en) * | 2016-10-26 | 2018-05-04 | 北京实验工厂 | A kind of triplex redundance servo valve quickly fills demagnetizing method |
| CN108716489A (en) * | 2018-08-07 | 2018-10-30 | 上海航天控制技术研究所 | A kind of Electric hydraulic pressure servo valve power level structure |
| CN110822129A (en) * | 2019-10-29 | 2020-02-21 | 中国航空工业集团公司西安飞行自动控制研究所 | Pressure feedback type slide valve structure |
| CN111089092A (en) * | 2019-12-24 | 2020-05-01 | 中航工业南京伺服控制系统有限公司 | Electro-hydraulic servo valve oil return pollutant protection structure |
-
2011
- 2011-02-15 CN CN2011200390733U patent/CN202182074U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640804B (en) * | 2015-10-30 | 2018-11-30 | 北京精密机电控制设备研究所 | A kind of prestage fission pressing type jet pipe servo valve |
| CN106640804A (en) * | 2015-10-30 | 2017-05-10 | 北京精密机电控制设备研究所 | Pre-stage split press-fit type jet pipe servo valve |
| CN106194898A (en) * | 2016-07-08 | 2016-12-07 | 同济大学 | A kind of jet pipe servo valve nozzle and the receiver hole centering method of inspection |
| CN106194898B (en) * | 2016-07-08 | 2018-02-09 | 同济大学 | A kind of jet pipe servo valve nozzle and the receiver hole centering method of inspection |
| CN107993789A (en) * | 2016-10-26 | 2018-05-04 | 北京实验工厂 | A kind of triplex redundance servo valve quickly fills demagnetizing method |
| CN107435667A (en) * | 2017-08-10 | 2017-12-05 | 燕山大学 | Piezoelectric ceramic driven jet pipe electrohydraulic servo valve |
| CN107435667B (en) * | 2017-08-10 | 2020-02-25 | 燕山大学 | Piezoelectric ceramic driven jet pipe electro-hydraulic servo valve |
| CN107588052A (en) * | 2017-10-17 | 2018-01-16 | 上海衡拓液压控制技术有限公司 | Valve element built-in piston formula big flow force feedback jet pipe two-stage electrohydraulic servo valve |
| CN107588052B (en) * | 2017-10-17 | 2023-09-12 | 上海衡拓液压控制技术有限公司 | Two-stage electrohydraulic servo valve with built-in valve core and piston type high-flow force feedback jet pipe |
| CN108716489A (en) * | 2018-08-07 | 2018-10-30 | 上海航天控制技术研究所 | A kind of Electric hydraulic pressure servo valve power level structure |
| CN108716489B (en) * | 2018-08-07 | 2020-04-10 | 上海航天控制技术研究所 | Power stage structure of electro-hydraulic pressure servo valve |
| CN110822129A (en) * | 2019-10-29 | 2020-02-21 | 中国航空工业集团公司西安飞行自动控制研究所 | Pressure feedback type slide valve structure |
| CN111089092A (en) * | 2019-12-24 | 2020-05-01 | 中航工业南京伺服控制系统有限公司 | Electro-hydraulic servo valve oil return pollutant protection structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120404 |