CN106640804A - Pre-stage split press-fit type jet pipe servo valve - Google Patents
Pre-stage split press-fit type jet pipe servo valve Download PDFInfo
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- CN106640804A CN106640804A CN201510726313.XA CN201510726313A CN106640804A CN 106640804 A CN106640804 A CN 106640804A CN 201510726313 A CN201510726313 A CN 201510726313A CN 106640804 A CN106640804 A CN 106640804A
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- magnetic conductor
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- feedback rod
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Abstract
The invention belongs to an electro-hydraulic servo valve, and particularly relates to a pre-stage split press-fit type jet pipe servo valve. The pre-stage split press-fit type jet pipe servo valve comprises a torque motor assembly, a receiver assembly and a power stage part; the torque motor assembly comprises an outer shell, an upper magnetic conductor, a lower magnetic conductor and an armature press-fit type assembly; the upper magnetic conductor and the lower magnetic conductor are fixed to the interior of the outer shell; the armature press-fit type assembly is positioned in the central axis of the upper magnetic conductor and the lower magnetic conductor, and the lower end of the armature press-fit type assembly penetrates through the bottom of the upper shell; the receiver assembly comprises a middle shell and a receiver which is positioned in the centre of the middle shell; and the power-stage part comprises a lower shell, a valve core which is positioned in a through cavity of the lower shell, two oil return throttling holes which are positioned at the lower end of the through cavity, and an oil filtering assembly which is fixed to the interior of a lower cavity. A torque motor air gap can be adjusted through an air gap adjusting gasket; the torque motor air gap consistency is good; the electro-hydraulic servo valve is not required to be disassembled and assembled during a debugging process; welding problems are avoided; and a threaded structure and power loss in the valve core are avoided.
Description
Technical field
The invention belongs to a kind of electrohydraulic servo valve, and in particular to a kind of prestage split pressing type jet pipe servo
Valve.
Background technology
Two stage jet pipe servo valve is generally made up of prestage and power stage two-stage hydraulic amplifier, wherein preposition
Level hydraulic amplifier is fluid amplifier by electro-machanical converter (torque-motor), jet pipe and recipient group
Into power stage hydraulic amplifier is made up of valve element.Electro-machanical converter is changed into low power electric signal
Jet pipe yaw motion, through the deflection of the high-speed jet of nozzle, the cavity pressure of recipient one is raised, another chamber
Reduced pressure so that prestage exports the control pressure reduction of certain power, this control pressure reduction promotes power stage liquid
Pressure amplifier valve element, and then hydraulic power is further amplified, its output performs unit for controlling hydraulic pressure
Part, with band dynamic load.Generally inside jet pipe servo valve, there is feedback device between power stage and prestage,
Output quantity (flow or pressure) is set accurately to follow input signal to change.
Torque-motor and jet pipe generally adopt integrally molded formula in the prestage of jet pipe servo valve.Torque horse
The air gap symmetry for reaching is one of performance-critical factor of guarantee servo valve, for the torque-motor gas of welded type
Gap symmetry can only be ensured that the factor such as location tolerance and welding deformation of frock causes air gap by frock
Symmetry is difficult to ensure, once to complete air gap symmetry unadjustable for welding.Torque-motor welding quality will
Ask higher, welding deep, weld width and welding uniformity etc. can cause stress concentration point, and watch in jet pipe
Take torque-motor in valve debugging and the course of work to rupture from weld seam.Therefore need to air gap symmetry and welding
Quality is strictly screened, and torque-motor scrappage is higher.
Nozzle and the spacing of recipient are one of key factors of guarantee servo valve performance in prestage, and jet
Pipe and torque-motor are welding as one, and nozzle on jet pipe and is welded by being threaded onto, nozzle and acceptance
Spacing between device can only be ensured by size, and the regulation of spacing is revolved by Surface Welding at High Temperature rear nozzle
Enter and screw out jet pipe to be adjusted, it is impossible to be adjusted by the output to prestage, be extremely difficult to preposition
The optimum state of level performance.
Feedback device between prestage and power stage, due to jet pipe and the version of recipient, feedback dress
Put and be welded on jet pipe by spring leaf, feedback rod is not at coaxial position with jet pipe parallel misalignment, because
And power stage mainly adopts valve core inside tapped through hole, screwed in by two pinching screw two ends and clamp feedback rod
Mode is returned to zero, and this mode zero-bit adjusts difficult, due to there is helicitic texture to be difficult to seal, the control of valve element two ends
Fluid leakage in chamber processed causes power loss.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of prestage split pressing type jet pipe servo valve, power
The problem that the irreconcilable welding quality of air gap symmetry that the welding of square motor integrated is caused is difficult to ensure that；Nozzle
Adjustability and nozzle Welding Problems of the spacing between recipient in test process；Power stage passes through valve element
Internal two pinching screw two ends screw in the problem that feedback rod adjusts zero-bit that clamps.
To solve above-mentioned technical problem, a kind of prestage split pressing type jet pipe servo valve of the invention, the dress
Put including torque-motor component, be fixed on receiving device assembly, being fixed on motor and connect for torque-motor component lower end
By the power stage part of device assembly lower end, torque-motor component includes shell body, is fixed on inside shell body
Upper magnetic conductor, lower magnetic conductor, positioned at upper magnetic conductor, the central axial line of lower magnetic conductor and upper casing is run through in lower end
The armature pressing type component of body bottom；Receive device assembly including middle housing and the recipient positioned at middle housing central authorities,
The two symmetrical holes upper ends in recipient inside are connected to armature pressing type component lower end nozzle；Power stage part includes
Lower house, positioned at lower house inside through cavities valve element, positioned at two meter outs of pipe transluminal body lower end
Hole, the oil filter component being fixed on inside lower chamber, oil filter component is communicated in armature pressing type component internal center
Hole；Through cavities two ends seal, and the cavity at valve element two ends is communicated in the recipient internal symmetry hole of homonymy；Rank
Iron pressing type component lower end feedback boom end bead is fixed on valve element middle part.
Described armature pressing type component includes feedback rod, stifled pin, oil pipe, armature, nozzle, blocks up pin and fixes
In the centre bore of closing feedback rod upper end；In the hole that oil pipe one end is fixed on the outside of feedback rod, in feedback rod
The centre bore UNICOM in portion, the oil pipe other end is communicated in described oil filter component；Bourdon tube press-fits outside feedback rod
Side；Armature press-fits and is fixed on bourdon tube, and armature is located at upper magnetic conductor, lower magnetic conductor intermediate space；
Feedback rod lower end passes upper shell and has the hole that is connected to inside center hole in bottom, and nozzle is fixed on feedback rod
Lower end, the hole of nozzle interior connects with the hole of upper shell；The direction of nozzle is perpendicular to the direction of armature.
Lower magnetic conductor bottom is lined with air gap adjust pad.
The through cavities is parallel to armature direction.
The present invention Advantageous Effects be：Torque-motor adopts mode connects for screw side in the prestage of the present invention
Formula, torque-motor air gap can be adjusted by air gap adjust pad, and torque-motor air gap uniformity is preferable；
The prestage of the present invention is Split type structure, and wherein recipient part is a Split type structure, can in debugging process
Directly acceptance is press-fited to adjust the spacing between nozzle and recipient, it is not necessary to dismount again；Prestage is more
For pressing type and mode connects for screw formula structure, it is to avoid Welding Problems；Feedback rod and the jet pipe of the present invention as
Integrative-structure, feedback rod is no longer that dislocation is parallel with jet pipe, therefore prestage band feedback rod can be inserted directly
Enter in the fit of power stage valve element, zero-bit is adjusted can directly be debugged without the dead valve element of folder, therefore
Avoid the helicitic texture and power loss of valve core inside.
Description of the drawings
Fig. 1 is a kind of prestage split pressing type jet pipe servo valve front view of the invention；
Fig. 2 is a kind of prestage split pressing type jet pipe servo valve left view of the invention；
Fig. 3 is armature pressing type component diagram；
Fig. 4 press-fits adjustable structure figure for recipient；
Fig. 5 is that air gap adjusts structure chart.
In figure：1- magnet steel, 2- feedback rods, 3- oil pipes, 4- torque-motor mounting screws, 5- air gap adjust pads,
6- coils, 7- armature, 8- bourdon tubes, 9- block up magnetic conductor under pin, the upper magnetic conductors of 10-, 11-, 12- upper shells,
Housing, 17- lower houses, 18- meter outs hole, 19- in 13- connectors, 14- nozzles, 15- recipients, 16-
Cover plate, 20- oil filter components, 21- valve elements, 22- plugs, 23- testboards, 24- depression bars.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
As shown in Figure 1, 2, a kind of prestage split pressing type jet pipe servo valve of the invention, mainly including front
Put level part and power stage part two parts.
Prestage part mainly by torque-motor component and receives device assembly and constitutes, torque-motor component lower end with
Receive device assembly upper end affixed by screw.
Torque-motor component includes upper shell 12, armature pressing type component, upper magnetic conductor 10, lower magnetic conductor 11,
Upper magnetic conductor 10, lower magnetic conductor 11 are assemblied in the inside of upper shell 12 by torque-motor mounting screw 4,
The lower bottom of magnetic conductor 11 is lined with air gap adjust pad 5, to adjust upper magnetic conductor 10, lower magnetic conductor 11
Highly；Upper magnetic conductor 10, the inner wrap of lower magnetic conductor 11 have coil；Upper magnetic conductor 10, lower magnetic conductor 11
There is gap centre；Armature pressing type component runs through upper magnetic conductor 10, the central axial line of lower magnetic conductor 11, and holds in the mouth
The armature 7 of iron pressing type component lies along the gap in the middle of magnetic conductor 10, lower magnetic conductor 11；Armature pressure
The bottom of upper shell 12 is run through in dress formula component bottom.
As shown in figure 3, armature pressing type component includes feedback rod 2, stifled pin 9, oil pipe 3, armature 7, company
Junctor 13, nozzle 14, stifled pin 9 press-fits the centre bore of closing feedback rod 2 upper end；The one end of oil pipe 3 press-fit in
In hole on the outside of feedback rod, with the centre bore UNICOM inside feedback rod 2, the other end of oil pipe 3 press-fits in upper casing
On body 12, and pass upper shell 12；Bourdon tube 8 press-fits in the outside of feedback rod 2；Armature 7 press-fits and is fixed on
On bourdon tube 8；The lower end of feedback rod 2 passes upper shell 12 and has the hole that is connected to inside center hole in bottom,
Nozzle 14 is fixed on the lower end of feedback rod 2 by connector 13, in the hole inside nozzle 14 and feedback rod 2
Heart hole connects；The direction of nozzle 14 is perpendicular to the direction of armature 7.
During installation, one, first stifled pin 9 is fitted in into the upper end of feedback rod 2, then oil pipe 3 is fitted in into feedback rod 2
It is upper and parallel with it.2nd, bourdon tube 8 is fitted on upper shell 12, then armature 7 is fitted in into bourdon tube
On.3rd, nozzle 14 is fitted on connector 13.4th, by feedback rod 2 with the synchronous press mounting of oil pipe 3,
Feedback rod 2 is fitted on bourdon tube 8, and oil pipe is fitted on upper shell 12.5th, by connector 13 under
Face pressure is mounted on feedback rod, and is press-fited in fixed position, it is ensured that size A.
Receiving device assembly includes mainly including recipient 15 and middle housing 16 that the component of recipient 15 press-fits fixation
Inside middle housing 16, receiver 15 has symmetrical two hole, and the upper end in two holes is all connected to
The lower end of nozzle 14, and the plane in two holes is parallel to the plane of armature 7；Under 15 two holes of receiver
End connects and the through hole inside middle housing 16.
As shown in figure 4, as sized A, testboard 23 is fixed on into the bottom of middle housing 16, middle shell
The through hole of body lower end draws respectively connection pressure device, by fuel feeding, checks the pressure of two through holes, leads to
Cross depression bar 24 and push up the numerical value that receiver 15 changes A upwards so as to reach required numerical value.
Power stage part is mainly made up of valve element 21, lower house 17, meter out hole 18, oil filter component 20,
The lower house 17 of power stage part is fixed on the bottom of middle housing 16 by screw；Valve element 21 is located at lower house
In 17 through cavities, the through cavities is parallel to the direction of armature 7；The two ends of the through cavities pass through plug
22 sealings are fixed；The intermediate groove of valve element 21 and the micro- interference fit of the end bead of feedback rod 2.Valve element 21 and two
End forms two cavitys respectively at plug 22, and two cavitys are connected and lower house by symmetrical inclination aperture
17 upper ends, and then connect the through hole inside the middle housing 16 with corresponding side；Meter out hole 18 has two,
Upper end is connected to the position of through cavities valve element 21, and lower end passes the bottom of lower house 17, is commonly connected to
Outside oil back chamber；Oil filter component 20 is fixed on lower house 17, and it passes through hole and be communicated in oil pipe 3 to press-fit in upper
The end of housing 12, when valve element 21 is centrally located, meter out hole 18 not with valve element 21 with it is stifled
The 22 cavitys connections for being formed；When valve element 21 is located off centre position, meter out hole 18 respectively with
The cavity that the valve element 21 of homonymy is formed with plug 22 is connected.
Prestage part is inserted directly into inside the intermediate groove of valve element 21 of power stage part 25 with feedback rod 2,
The logical oil in the inside of feedback rod 2 instead of jet pipe, and prestage part 24 is entered with power stage part 25 by screw
Row is affixed.
Between air gap adjusts structure as shown in figure 5, going up between magnetic conductor 10 and lower magnetic conductor 11 in prestage
Gap H is fixed value, and upper magnetic conductor 10 forms air gap delta 1 with armature 7, and lower magnetic conductor 11 is formed with armature 7
Air gap delta 2, upper magnetic conductor 10 is caused with lower magnetic conductor by changing air gap adjust pad 5 to change size h
About 11 adjust, and δ 1 and δ 2 is adjusted with this, it is ensured that the air gap uniformity of torque-motor.
During work, when input control electric current to coil 6, the control magnetic flux generated on armature 7 is given birth to magnet steel 1
Produce permanent magnet flux to interact, then produce a torque on armature 7, the armature 7 for promoting to be press fit together,
Bourdon tube 8 and nozzle 13 deflect a low-angle for being proportional to torque, and hydraulic oil is through oil filter component 20, oil
The high-speed jet that pipe 3, feedback rod 2 and nozzle 13 are formed deflects so that the cavity pressure liter of recipient 15 1
Height, another cavity pressure is reduced, and the two ends of valve element 20 for connecting this two chamber form control pressure reduction, and control pressure reduction is promoted
Valve element 20 is moved, and valve element 20 drives feedback rod 2 to produce feedback moment, until feedback moment and motor torque
Balance each other, now nozzle 14 is returned to certain equilbrium position near the centre of recipient 15.Such valve element
20 displacement is directly proportional to the size of control electric current, the output flow of valve also to be directly proportional in control electric current.
Above in conjunction with drawings and Examples, invention has been described, it is clear that the present invention's implements not
Limited by aforesaid way.As long as the unsubstantiality that the design for employing the present invention and technical scheme are carried out is improved,
Or it is not improved, the design of the present invention and technical scheme are directly applied to into other occasions, at this
In bright protection domain.
Claims (4)
1. a kind of prestage split pressing type jet pipe servo valve, it is characterised in that：The device includes torque horse
Up to component, it is fixed on receiving device assembly, being fixed on motor and receive device assembly lower end for torque-motor component lower end
Power stage part, torque-motor component include shell body, be fixed on inside shell body upper magnetic conductor (10),
Lower magnetic conductor (11), run through positioned at upper magnetic conductor (10), the central axial line of lower magnetic conductor (11) and lower end
Go out the armature pressing type component of upper shell (12) bottom；Receive device assembly including middle housing (16) and be located at
The recipient (15) in middle housing central authorities, the internal two symmetrical holes upper ends of recipient (15) are connected to armature and press-fit
Formula component lower end nozzle (14)；Power stage part is including lower house (17), positioned at lower house (17) inside
The valve element (21) of through cavities, two meter out holes (18) positioned at pipe transluminal body lower end, be fixed under
The oil filter component (20) of inside cavity, oil filter component (20) is communicated in armature pressing type component internal centre bore；
Through cavities two ends seal, and the recipient (15) that the cavity at valve element (21) two ends is communicated in homonymy is internal right
Claim hole；Armature pressing type component lower end feedback rod (2) end bead is fixed on valve element (21) middle part.
2. a kind of prestage split pressing type jet pipe servo valve according to claim 1, its feature exists
In：Described armature pressing type component include feedback rod (2), stifled pin (9), oil pipe (3), armature (7),
Nozzle (14), stifled pin (9) is fixed on the centre bore of closing feedback rod (2) upper end；Oil pipe (3) one end
In the hole being fixed on the outside of feedback rod, the internal centre bore UNICOM with feedback rod (2), oil pipe (3) is another
End is communicated in described oil filter component (20)；Bourdon tube (8) press-fits in feedback rod (2) outside；Armature (7)
Press-fit and be fixed on bourdon tube (8), and armature (7) is positioned at upper magnetic conductor (10), lower magnetic conductor (11)
Intermediate space；Feedback rod (2) lower end passes upper shell (12) and has in bottom and is connected to inside center hole
Hole, nozzle (14) is fixed on feedback rod (2) lower end, the internal hole of nozzle (14) and upper shell (12)
Hole connection；Direction of the direction of nozzle (14) perpendicular to armature (7).
3. a kind of prestage split pressing type jet pipe servo valve according to claim 2, its feature exists
In：Lower magnetic conductor (11) bottom is lined with air gap adjust pad (5).
4. a kind of prestage split pressing type jet pipe servo valve according to claim 3, its feature exists
In：The through cavities is parallel to armature (7) direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510726313.XA CN106640804B (en) | 2015-10-30 | 2015-10-30 | A kind of prestage fission pressing type jet pipe servo valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510726313.XA CN106640804B (en) | 2015-10-30 | 2015-10-30 | A kind of prestage fission pressing type jet pipe servo valve |
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| Publication Number | Publication Date |
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| CN106640804A true CN106640804A (en) | 2017-05-10 |
| CN106640804B CN106640804B (en) | 2018-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510726313.XA Active CN106640804B (en) | 2015-10-30 | 2015-10-30 | A kind of prestage fission pressing type jet pipe servo valve |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108150470A (en) * | 2017-12-20 | 2018-06-12 | 中国航发长春控制科技有限公司 | A kind of electrohydraulic servo valve bourdon tube |
| CN109268330A (en) * | 2018-11-06 | 2019-01-25 | 襄阳航宇机电液压应用技术有限公司 | A kind of offset-type serving volume valve |
| US10811948B2 (en) | 2017-10-19 | 2020-10-20 | Hamilton Sunstrand Corporation | System and method for calibrating an air gap in a servovalve torque motor |
| US11018568B2 (en) | 2018-03-08 | 2021-05-25 | Hamilton Sunstrand Corporation | Servovalve with adjustable air gaps |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3589238A (en) * | 1969-02-24 | 1971-06-29 | Gen Electric | Variable gain jet pipe servo valve |
| EP1921327A1 (en) * | 2006-11-09 | 2008-05-14 | Honeywell International Inc. | Flexible, hermetic pivot seal for torque motor |
| CN101614289A (en) * | 2008-06-25 | 2009-12-30 | 中国船舶重工集团公司第七○四研究所 | Electro-hydraulic servo valve for prestage independent type jet flow pipe |
| CN202001410U (en) * | 2011-02-28 | 2011-10-05 | 西安陕鼓动力股份有限公司 | Resetting mechanism of hydraulic servo valve |
| CN202182074U (en) * | 2011-02-15 | 2012-04-04 | 九江中船仪表有限责任公司（四四一厂） | High-flow jet pipe type secondary electro-hydraulic servo valve |
| CN103089726A (en) * | 2011-10-27 | 2013-05-08 | 北京精密机电控制设备研究所 | Eccentric shifting rod type direct-drive digital servo valve |
-
2015
- 2015-10-30 CN CN201510726313.XA patent/CN106640804B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3589238A (en) * | 1969-02-24 | 1971-06-29 | Gen Electric | Variable gain jet pipe servo valve |
| EP1921327A1 (en) * | 2006-11-09 | 2008-05-14 | Honeywell International Inc. | Flexible, hermetic pivot seal for torque motor |
| CN101614289A (en) * | 2008-06-25 | 2009-12-30 | 中国船舶重工集团公司第七○四研究所 | Electro-hydraulic servo valve for prestage independent type jet flow pipe |
| CN202182074U (en) * | 2011-02-15 | 2012-04-04 | 九江中船仪表有限责任公司（四四一厂） | High-flow jet pipe type secondary electro-hydraulic servo valve |
| CN202001410U (en) * | 2011-02-28 | 2011-10-05 | 西安陕鼓动力股份有限公司 | Resetting mechanism of hydraulic servo valve |
| CN103089726A (en) * | 2011-10-27 | 2013-05-08 | 北京精密机电控制设备研究所 | Eccentric shifting rod type direct-drive digital servo valve |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10811948B2 (en) | 2017-10-19 | 2020-10-20 | Hamilton Sunstrand Corporation | System and method for calibrating an air gap in a servovalve torque motor |
| CN108150470A (en) * | 2017-12-20 | 2018-06-12 | 中国航发长春控制科技有限公司 | A kind of electrohydraulic servo valve bourdon tube |
| US11018568B2 (en) | 2018-03-08 | 2021-05-25 | Hamilton Sunstrand Corporation | Servovalve with adjustable air gaps |
| CN109268330A (en) * | 2018-11-06 | 2019-01-25 | 襄阳航宇机电液压应用技术有限公司 | A kind of offset-type serving volume valve |
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| Publication number | Publication date |
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| CN106640804B (en) | 2018-11-30 |
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