CN106640804B - A kind of prestage fission pressing type jet pipe servo valve - Google Patents
A kind of prestage fission pressing type jet pipe servo valve Download PDFInfo
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- CN106640804B CN106640804B CN201510726313.XA CN201510726313A CN106640804B CN 106640804 B CN106640804 B CN 106640804B CN 201510726313 A CN201510726313 A CN 201510726313A CN 106640804 B CN106640804 B CN 106640804B
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Abstract
The invention belongs to a kind of electrohydraulic servo valves, and in particular to a kind of prestage fission pressing type jet pipe servo valve.The device includes torque-motor component, receives device assembly, power stage part, and torque-motor component includes outer housing, the upper magnetizer being fixed on inside outer housing, lower magnetizer, the armature pressing type component positioned at upper magnetizer, the central axial line of lower magnetizer and lower end through upper housing bottom out；Receiving device assembly includes middle shell and the recipient positioned at middle shell center；Power stage part includes lower case, the spool positioned at lower case inside through cavities, two meter out holes positioned at pipe transluminal body lower end, the oil filter component being fixed on inside lower chamber.Torque-motor air gap can adjust gasket by air gap and be adjusted, and torque-motor air gap consistency is preferable；The present invention need not dismount again in debugging process；Avoid Welding Problems；Avoid the helicitic texture and power loss of valve core inside.
Description
Technical field
The invention belongs to a kind of electrohydraulic servo valves, and in particular to a kind of prestage fission pressing type jet pipe servo valve.
Background technique
Two stage jet pipe servo valve is usually made of prestage and power stage two-stage hydraulic amplifier, and wherein prestage is hydraulic
Amplifier is that fluid amplifier is made of electro-machanical converter (torque-motor), jet pipe and recipient, and power stage is hydraulic to put
Big device is made of spool.Low power electric signal is changed into jet pipe yaw motion by electro-machanical converter, by nozzle
The deflection of high-speed jet, one cavity pressure of recipient increase, and another cavity pressure reduces, so that prestage exports the control of certain power
Pressure difference, this control pressure difference pushes power stage hydraulic amplifier spool, and then hydraulic power is further amplified, and exports
For controlling hydraulic actuator, with band dynamic load.Have usually inside jet pipe servo valve, between power stage and prestage anti-
Device is presented, output quantity (flow or pressure) is made accurately input signal to be followed to change.
Torque-motor and jet pipe generally use integrally molded formula in the prestage of jet pipe servo valve.The gas of torque-motor
Gap symmetry is to guarantee one of the performance-critical factor of servo valve, and the torque-motor air gap symmetry of welded type can only be passed through
Tooling is guaranteed that the factors such as location tolerance and welding deformation of tooling cause air gap symmetry to be not easy to guarantee, once it has welded
It is unadjustable at air gap symmetry.Torque-motor welding quality is more demanding, welds deep, weld width and welding consistency etc.
It will cause stress concentration point, and torque-motor is broken from weld seam in jet pipe servo valve debugging and the course of work.Therefore it needs
Air gap symmetry and welding quality are strictly screened, torque-motor scrappage is higher.
The spacing of nozzle and recipient is one of the key factor of guarantee servo valve performance in prestage, and jet pipe and power
Square motor is welding as one, and for nozzle by being threaded on jet pipe and being welded, the spacing between nozzle and recipient can only
Guaranteed by size, and the adjusting of spacing is to screw in and screw out jet pipe by Surface Welding at High Temperature rear nozzle to be adjusted, no
It can be adjusted by the output to prestage, be extremely difficult to the optimum state of prestage performance.
Feedback device between prestage and power stage, due to the structure type of jet pipe and recipient, feedback device passes through
Spring leaf is welded on jet pipe, and feedback rod and jet pipe parallel misalignment are not at coaxial position, thus power stage mainly uses
Valve core inside tapped through hole returns to zero in such a way that two pinching screw both ends screw in and clamp feedback rod, this mode zero-bit tune
Section is difficult, and due to there is helicitic texture to be difficult to seal, spool both ends control chamber oil liquid leakage causes power loss.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of prestage fission pressing type jet pipe servo valve, torque-motors
The problem of irreconcilable welding quality of air gap symmetry caused by integral type is welded is difficult to ensure；Spacing between nozzle and recipient
Adjustability and nozzle Welding Problems during the test；Power stage is screwed in by two pinching screw both ends of valve core inside and is clamped
Feedback rod adjusts the problem of zero-bit.
In order to solve the above technical problems, a kind of prestage fission pressing type jet pipe servo valve of the present invention, it is characterised in that：
The servo valve includes torque-motor component, is fixed on receiving device assembly, being fixed on motor recipient for torque-motor component lower end
The power stage part of component lower end, torque-motor component include upper housing, the upper magnetizer being fixed on inside upper housing, lower magnetic conduction
Body, the armature pressing type component for running through upper housing bottom positioned at upper magnetizer, the central axial line of lower magnetizer and lower end；Receive
Device assembly includes middle shell and the recipient positioned at middle shell center, and two symmetrical holes upper ends are connected to armature pressure inside recipient
Dress formula component lower end nozzle；Power stage part include lower case, inside the lower case spool of through cavities, be located at through chamber
Two meter out holes of body lower end, the oil filter component being fixed on inside lower case, oil filter component are connected to armature pressing type group
Part inside center hole；The sealing of through cavities both ends, the cavity at spool both ends are connected to ipsilateral recipient internal symmetry hole；Armature
Pressing type component lower end feedback boom end bead is fixed in the middle part of spool；
The armature pressing type component includes feedback rod, stifled pin, oil pipe, armature, nozzle, and stifled pin is fixed on closing feedback
The centre bore of bar upper end；Oil pipe one end is fixed in the hole on the outside of feedback rod, and with the centre bore connection inside feedback rod, oil pipe is another
One end is connected to the oil filter component；Bourdon tube press fitting is on the outside of feedback rod；Armature press fitting is fixed on bourdon tube, and armature
Positioned at upper magnetizer, lower magnetizer intermediate space；Feedback rod lower end is pierced by upper housing and is connected to inside center hole in lower part
Hole, nozzle is fixed on feedback rod lower end, and the hole of nozzle interior is connected to the centre bore of feedback rod；The direction of nozzle is perpendicular to rank
The direction of iron.
Lower magnetizer lower part is lined with air gap adjustment gasket.
The through cavities is parallel to armature direction.
The beneficial technical effect of the present invention lies in：Torque-motor uses screw connecting mode, power in prestage of the invention
Square motor air-gap can adjust gasket by air gap and be adjusted, and torque-motor air gap consistency is preferable；Prestage of the invention
For separate structure, wherein recipient part is a separate structure, can be directly pressed to receiving to adjust in debugging process
Spacing between nozzle and recipient, it is not necessary to dismount again；Prestage is mostly pressing type and screw linking structure, avoids welding
Problem；For feedback rod and jet pipe of the invention as integral structure, feedback rod is no longer that dislocation is parallel therefore preposition with jet pipe
Grade is directly inserted into the mating groove of power stage spool with feedback rod, and zero-bit is adjusted can directly carry out without the dead spool of folder
Debugging, therefore avoid the helicitic texture and power loss of valve core inside.
Detailed description of the invention
Fig. 1 is a kind of prestage fission pressing type jet pipe servo valve main view of the present invention；
Fig. 2 is a kind of prestage fission pressing type jet pipe servo valve left view of the present invention；
Fig. 3 is armature pressing type component diagram；
Fig. 4 is that recipient is pressed adjustable structure figure；
Fig. 5 is that air gap adjusts structure chart.
In figure：1- magnet steel, 2- feedback rod, 3- oil pipe, 4- torque-motor mounting screw, 5- air gap adjustment gasket, 6- coil,
7- armature, 8- bourdon tube, 9- block up pin, magnetizer under the upper magnetizer of 10-, 11-, 12- upper housing, 13- connector, 14- nozzle,
Shell, 17- lower case, 18- meter out hole, 19- cover board, 20- oil filter component, 21- spool, 22- are stifled in 15- recipient, 16-
Head, 23- testboard, 24- compression bar.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and examples.
As shown in Figure 1, 2, a kind of prestage fission pressing type jet pipe servo valve of the present invention mainly includes prestage part
With power stage part two parts.
Prestage part mainly by torque-motor component and receives device assembly and forms, torque-motor component lower end and recipient
Component upper end is affixed by screw.
Torque-motor component includes upper housing 12, armature pressing type component, upper magnetizer 10, lower magnetizer 11, upper magnetic conduction
Body 10, lower magnetizer 11 are assemblied in the inside of upper housing 12 by torque-motor mounting screw 4, and lower 11 lower part of magnetizer is lined with gas
Gap adjusts gasket 5, to adjust the height of upper magnetizer 10, lower magnetizer 11；Upper magnetizer 10,11 inner wrap of lower magnetizer
There is coil；There is gap among upper magnetizer 10, lower magnetizer 11；Armature pressing type component runs through upper magnetizer 10, lower magnetizer
11 central axial line, and the armature 7 of armature pressing type component lies along the gap of magnetizer 10,11 centre of lower magnetizer；
Armature pressing type component lower part is through the bottom for going out upper housing 12.
As shown in figure 3, armature pressing type component includes feedback rod 2, stifled pin 9, oil pipe 3, armature 7, connector 13, nozzle
14, block up the centre bore of the press fitting closing of pin 92 upper end of feedback rod；3 one end of oil pipe is pressed in the hole on the outside of feedback rod, with feedback rod 2
Internal centre bore connection, the press fitting of 3 other end of oil pipe are pierced by upper housing 12 on upper housing 12；Bourdon tube 8 is pressed in feedback
2 outside of bar；The press fitting of armature 7 is fixed on bourdon tube 8；2 lower end of feedback rod is pierced by upper housing 12 and is connected to inside in lower part
The hole of centre bore, nozzle 14 are fixed on 2 lower end of feedback rod by connector 13, the center in the hole inside nozzle 14 and feedback rod 2
Hole connection；Direction of the direction of nozzle 14 perpendicular to armature 7.
When installation, one, stifled pin 9 is first fitted in 2 upper end of feedback rod, then oil pipe 3 is fitted on feedback rod 2 and is put down therewith
Row.Two, bourdon tube 8 is fitted on upper housing 12, then armature 7 is fitted on bourdon tube.Three, nozzle 14 is fitted in connection
On body 13.Four, by feedback rod 2 with 3 synchronous press mounting of oil pipe, feedback rod 2 is fitted on bourdon tube 8, and oil pipe is fitted in upper housing
On 12.Five, connector 13 is fitted on feedback rod from below, and be pressed in fixed position, guarantee size A.
Receive device assembly to include mainly to include recipient 15 and middle shell 16, the press fitting of recipient 15 is fixed in middle shell 16
Portion, recipient 15 have two symmetrical holes, and the upper end in two holes is all connected to the lower end of nozzle 14, and two holes is flat
Face is parallel to the plane of armature 7；Lower end connection and the through hole inside middle shell 16 in 15 two holes of recipient.
As shown in figure 4, testboard 23 is fixed on middle 16 lower part of shell, middle shell lower end is run through as sized A
Hole draws connection pressure device respectively and checks the pressure of two through holes by fuel feeding, is changed by the upward apical grafting receiver 15 of compression bar 24
The numerical value for becoming A reaches required numerical value.
Power stage part is mainly made of spool 21, lower case 17, meter out hole 18, oil filter component 20, power stage portion
The lower case 17 divided is fixed on the lower part of middle shell 16 by screw；Spool 21 is located in the through cavities of lower case 17, this is passed through
Transluminal body is parallel to 7 direction of armature；The both ends of the through cavities are fixed by the sealing of plug 22；21 intermediate groove of spool and feedback
The 2 micro- interference fit of end bead of bar.Respectively at two cavitys of formation of plug 22, which passes through symmetrical for spool 21 and both ends
The connection of inclination aperture and 17 upper end of lower case, and then be connected to and the through hole inside the middle shell 16 of corresponding side；Meter out
There are two holes 18, and upper end is connected to 21 position of through cavities spool, and lower end is pierced by 17 lower part of lower case, is commonly connected to outer
The oil back chamber in portion；Oil filter component 20 is fixed on lower case 17, and through hole is connected to oil pipe 3 and is pressed in the end of upper housing 12,
When spool 21 is centrally located, meter out hole 18 is not connected to spool 21 with the cavity that plug 22 is formed；When spool 21
When being located off middle position, meter out hole 18 is connected to ipsilateral spool 21 with the cavity that plug 22 is formed respectively.
Prestage part is inserted directly into inside 21 intermediate groove of spool of power stage part 25 with feedback rod 2, in feedback rod 2
Instead of jet pipe, prestage part is carried out with power stage part by screw affixed the logical oil in portion.
Air gap adjusts structure as shown in figure 5, the gap H in prestage between upper magnetizer 10 and lower magnetizer 11 is to fix
Value, upper magnetizer 10 form air gap delta 1 with armature 7, and lower magnetizer 11 forms air gap delta 2 with armature 7, by replacing air gap adjusting pad
Piece 5 adjusts upper magnetizer 10 with lower about 11 magnetizer to change size h, adjusts δ 1 and δ 2, guarantee torque horse with this
The air gap consistency reached.
When work, when input control electric current to coil 6, the control magnetic flux generated on armature 7 and magnet steel 1 produce permanent-magnet magnetic
Logical interaction, then generates a torque on armature 7, the armature 7 being press fit together, bourdon tube 8 and nozzle 14 is promoted to deflect
One is proportional to the low-angle of torque, the high rapid fire that high pressure oil is formed by oil filter component 20, oil pipe 3, feedback rod 2 and nozzle 14
Stream deflects, so that 15 1 cavity pressure of recipient increases, another cavity pressure is reduced, and 21 both ends of spool for connecting this two chamber are formed
Control pressure difference, control pressure difference push spool 21 move, spool 21 drive feedback rod 2 generate feedback moment, until feedback moment with
Motor torque balances each other, and nozzle 14 is returned to some equilbrium position near the centre of recipient 15 at this time.Spool 21 in this way
Displacement is directly proportional to the control size of electric current, and the output flow of valve is also directly proportional in control electric current.
Above in conjunction with drawings and examples, invention has been described, it is clear that specific implementation of the invention is not by above-mentioned
The limitation of mode.It, will as long as using the unsubstantiality that conception and technical scheme of the invention carry out to improve, or not improved
Conception and technical scheme of the invention directly apply to other occasions, are within the scope of the invention.
Claims (3)
1. a kind of prestage fission pressing type jet pipe servo valve, it is characterised in that：The servo valve includes torque-motor component, consolidates
Receive device assembly due to torque-motor component lower end, be fixed on the power stage part that motor receives device assembly lower end, torque horse
Include upper housing, the upper magnetizer (10) being fixed on inside upper housing, lower magnetizer (11), be located at upper magnetizer up to component
(10), the armature pressing type component of upper housing (12) bottom is run through in the central axial line of lower magnetizer (11) and lower end；Recipient
Component includes middle shell (16) and the recipient (15) positioned at middle shell center, and the internal two symmetrical holes upper ends of recipient (15) connect
It is connected to armature pressing type component lower end nozzle (14)；Power stage part includes lower case (17), is located inside lower case (17) and passes through
The spool (21) of transluminal body, positioned at two of through cavities lower end meter out hole (18), the oily filter that is fixed on inside lower case
Component (20), oil filter component (20) are connected to armature pressing type component internal centre bore；The sealing of through cavities both ends, spool (21)
The cavity at both ends is connected to ipsilateral recipient (15) internal symmetry hole；Armature pressing type component lower end feedback rod (2) end is small
Ball is fixed in the middle part of spool (21)；
The armature pressing type component includes feedback rod (2), stifled pin (9), oil pipe (3), armature (7), nozzle (14), blocks up pin
(9) it is fixed on the centre bore of closing feedback rod (2) upper end；Oil pipe (3) one end is fixed in the hole on the outside of feedback rod, with feedback rod
(2) internal centre bore connection, oil pipe (3) other end are connected to the oil filter component (20)；Bourdon tube (8) is pressed in feedback
On the outside of bar (2)；Armature (7) press fitting is fixed on bourdon tube (8), and armature (7) is located at upper magnetizer (10), lower magnetizer (11)
Intermediate space；Feedback rod (2) lower end is pierced by upper housing (12) and has the hole for being connected to inside center hole in lower part, and nozzle (14) is solid
It is scheduled on feedback rod (2) lower end, the internal hole of nozzle (14) is connected to the centre bore of feedback rod (2)；The direction of nozzle (14) is vertical
In the direction of armature (7).
2. a kind of prestage fission pressing type jet pipe servo valve according to claim 1, it is characterised in that：Lower magnetizer
(11) lower part is lined with air gap adjustment gasket (5).
3. a kind of prestage fission pressing type jet pipe servo valve according to claim 2, it is characterised in that：It is described to run through
Cavity 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106640804A CN106640804A (en) | 2017-05-10 |
| CN106640804B true CN106640804B (en) | 2018-11-30 |
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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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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3474430B1 (en) | 2017-10-19 | 2022-08-24 | Hamilton Sundstrand 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 |
| EP3536979B1 (en) | 2018-03-08 | 2021-04-28 | Hamilton Sundstrand 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 |
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 |
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