CN204371811U - A kind of direct drive Electric hydraulic pressure servo valve - Google Patents
A kind of direct drive Electric hydraulic pressure servo valve Download PDFInfo
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- CN204371811U CN204371811U CN201420775600.0U CN201420775600U CN204371811U CN 204371811 U CN204371811 U CN 204371811U CN 201420775600 U CN201420775600 U CN 201420775600U CN 204371811 U CN204371811 U CN 204371811U
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- spool
- pressure
- valve
- push rod
- armature component
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Abstract
The utility model relates to a kind of direct drive Electric hydraulic pressure servo valve, there is postiive gain pressure control function, comprise: permanent magnetism differential linear force motor, straight-line displacement guiding valve, micro pressure sensor [14] and integrated manipulator [15], it is characterized in that: described straight-line displacement guiding valve comprises housing [11], valve pocket [12], spool [13], push rod [1], valve pocket [12] is placed in housing [11], spool [13] is placed in valve pocket [12], and push rod [1] one end is connected on spool [13]; The armature component [5] of described permanent magnetism differential linear force motor inside is socketed on push rod [1], and the push rod [1] band movable valve plug [13] that moves through of armature component [5] moves, pressure output control; Housing [11] is provided with oil circuit and is linked up by the installation oil circuit of same for load cavity pressure micro pressure sensor [14]; By micro pressure sensor [14], load cavity pressure is converted to electrical signal and feeds back to integrated manipulator [15], realize pressure closed loop and control.The utility model has that driving force is large, and static characteristic is good, and contamination resistance is strong, it is little to reveal, stable performance, the feature that reliability is high.
Description
Technical field
The utility model belongs to aerial hydraulic field, relates to a kind of direct drive electrohydraulic control with postiive gain pressure control function, is mainly used in and requires pressure output control and the directly proportional hydraulic system of input control signal.
Background technique
At present, the structure of Electric hydraulic pressure servo valve mainly adopts Dual Injector Baffle hydraulic pressure prestage to drive the structure of guiding valve.Because the gap between nozzle flapper is little, easily block, therefore contamination resistance is poor, and zero stability is weak, and reliability is low.
Direct drive electrohydraulic control adopts translational forces motor Direct driver spool, instead of in the past to the nozzle flapper hydraulic prestage of oil cleanliness sensitivity, avoid because oil contamination in hydraulic system causes product performance to decline or the generation of failure phenomenon, there is driving force large, contamination resistance is strong, and reveal little, structure is simple, debug conveniently, the advantage that reliability is high.Owing to have employed electric feedback loop, static properties is further enhanced.
The technology of rare earth permanent magnet translational forces motor Direct driver spool is applied to pressure control servovalve field, to environmental suitability and the reliability of existing pressure servo valve be significantly improved, thus meet the reliability also improving system or main frame in systemic-function situation.
Summary of the invention
The purpose of this utility model: design a kind of servovalve being realized pressure control function by rare earth permanent magnet translational forces motor Direct driver spool, has contamination resistance strong, stable performance, reveals little, that reliability is high feature, and has good static output characteristic.
The technical solution of the utility model: a kind of direct drive Electric hydraulic pressure servo valve with postiive gain pressure control function, comprise permanent magnetism differential linear force motor, straight-line displacement guiding valve, micro pressure sensor and integrated manipulator, described straight-line displacement guiding valve comprises housing, valve pocket, spool, push rod, valve pocket is placed in housing, spool is placed in valve pocket, and push rod one end is connected on spool; The armature component of described permanent magnetism differential linear force motor inside is socketed on push rod, and the push rod that moves through of armature component drives valve core movement, pressure output control; Housing is provided with oil circuit and is linked up by the installation oil circuit of load cavity pressure with micro pressure sensor; By micro pressure sensor, load cavity pressure is converted to electrical signal and feeds back to integrated manipulator, realize pressure closed loop and control.
Described valve pocket is provided with the through hole of two φ 1, is communicated with spool two ends cavity volume, makes two cavity pressure balances; Described spool adopts biconvex shoulder structural type, and spool working edge and valve pocket return opening working edge have certain pre-opening amount, realize postiive gain Stress control.
Described permanent magnetism differential linear force motor comprises permanent magnet, magnetic guiding loop, control coil, armature component, supported spring, stop collar, left cover, right cover and bearing steel ball, armature component is fixed on supported spring by screw thread, permanent magnet, magnetic guiding loop and stop collar by glue bond in left cover and right cover, control coil is arranged between left cover and right cover, the left and right end face of armature component and corresponding magnet case working surface form working gas gap, the left end of armature component adopts bearing steel ball to support, and permanent magnetism differential linear force motor is installed on housing by four screws.
The beneficial effects of the utility model: compared with prior art, the beneficial effects of the utility model are, owing to have employed the structure of rare earth permanent magnet translational forces motor Direct driver spool, thus have driving force large, contamination resistance is strong, the advantage that reliability is high.Owing to have employed electric feedback pressure closed loop control, thus there is good static characteristic.Owing to eliminating nozzle flapper hydraulic amplifier, the constant value without spray block level is leaked, and thus has the feature that internal leakage is little.Product structure is simple, and assembling and setting is convenient.
Accompanying drawing illustrates:
Fig. 1 is the utility model structure principle chart;
Fig. 2 is the utility model guiding valve auxiliary structure schematic diagram.
The pre-opening amount of P----oil suction chamber S----control chamber R----oil back chamber Q----oil return working edge
Embodiment
Below in conjunction with Figure of description, the utility model is described in further detail.Refer to Figure of description 1 ~ 2.
The utility model comprises permanent magnetism differential linear force motor, straight-line displacement guiding valve, micro pressure sensor 14 and integrated manipulator 15.Described straight-line displacement guiding valve comprises housing 11, valve pocket 12, spool 13, push rod 1, valve pocket 12 is placed in housing 11, spool 13 is placed in valve pocket 12, spool 13 working edge and valve pocket 12 return opening working edge have certain pre-opening amount, housing 11 is provided with oil circuit and is linked up by the installation oil circuit of load cavity pressure with micro pressure sensor 14, and push rod 1 one end is connected on spool 13.Valve pocket 12 is provided with the through hole of two φ 1, links up spool 13 two ends cavity volume, makes two cavity pressure balances;
Described permanent magnetism differential linear force motor comprises permanent magnet 4, magnetic guiding loop 7, control coil 6, armature component 5, supported spring 2, bearing steel ball 10, stop collar 8, left cover 9, right cover 3, armature component 5 one end is fixed on supported spring 2 by screw thread, the other end is supported by bearing steel ball 10, permanent magnet 4, magnetic guiding loop 7, stop collar 8 are by glue bond in left cover 9 and right cover 3, and control coil 6 is arranged between left cover 9 and right cover 3.The left and right end face of armature component 5 and corresponding magnet case working surface form working gas gap, and armature component 5 is connected with the other end of push rod 1.Permanent magnetism differential linear force motor is installed on housing 11 by four screws.
Permanent magnet 4 produces fixing magnetic flux at working gas gap place, control coil 6 produces at working gas gap place and controls magnetic flux, because the acting in conjunction of fixing magnetic flux and control magnetic flux causes armature component 5 to move, and movable valve plug 13 is with to move by push rod 1, thus control load chamber delivery pressure.Supported spring 2 has suitable rigidity, ensures that force motor can reliablely and stablely work, when power is off, overcomes guiding valve frictional force, make spool 13 get back to initial position.
Micro pressure sensor 14 is arranged on housing 11 by screw thread, integrated manipulator 15 is installed on housing 11 by screw, micro pressure sensor 14 converts the pressure signal that guiding valve level exports to voltage signal and feeds back to the input end of integrated manipulator 15, compared with input instruction signal, form pressure closed loop and control.
Working principle of the present utility model is:
When input instruction signal is zero, valve is in zero-bit, and namely spool 13 displacement is zero, and because spool 13 working edge and valve pocket 12 return opening working edge have certain pre-opening amount, the pilot pressure that valve exports is zero, when inputting positive command signal to valve, the power stage of integrated manipulator 15 just produces positive control command electric current on control coil 6, force motor produces and controls magnetic flux, the fixing magnetic flux controlling magnetic flux and permanent magnet 4 generation interacts, armature component 5 produces a control force, make push rod 1 drag spool 13 to be moved to the left, meter out window area is reduced, meter in window area increases, oil suction chamber is defeated by the working solution of servovalve, a part flows into load chamber by oil-feed window banging limit, a part is flowed out by oil return window banging limit, load cavity pressure increases.Micro pressure sensor 14 is experienced the pressure of load cavity and is converted to the signal input part that feedback voltage feeds back to integrated manipulator 15, compared with input voltage signal, error voltage is relatively by regulating spool 13 displacement, make the delivery pressure of valve reach designated value, thus realize input signal and become one-to-one relationship with the pilot pressure that valve exports.The signal of input is larger, and the pilot pressure of output is also larger, achieves the Stress control of postiive gain.On the contrary, when an input negative signal, armature component 5 drags spool 13 and moves right, and the pressure exporting to load cavity is constantly equal to return pressure.
Claims (3)
1. a direct drive Electric hydraulic pressure servo valve, there is postiive gain pressure control function, comprise: permanent magnetism differential linear force motor, straight-line displacement guiding valve, micro pressure sensor [14] and integrated manipulator [15], it is characterized in that: described straight-line displacement guiding valve comprises housing [11], valve pocket [12], spool [13], push rod [1], valve pocket [12] is placed in housing [11], spool [13] is placed in valve pocket [12], and push rod [1] one end is connected on spool [13]; The armature component [5] of described permanent magnetism differential linear force motor inside is socketed on push rod [1], and the push rod [1] band movable valve plug [13] that moves through of armature component [5] moves, pressure output control; Housing [11] is provided with oil circuit and is linked up by the installation oil circuit of same for load cavity pressure micro pressure sensor [14]; By micro pressure sensor [14], load cavity pressure is converted to electrical signal and feeds back to integrated manipulator [15], realize pressure closed loop and control.
2. direct drive Electric hydraulic pressure servo valve according to claim 1, is characterized in that: described valve pocket [12] is provided with the through hole of two φ 1, is communicated with spool [13] two ends cavity volume, makes two cavity pressure balances; Described spool [13] adopts biconvex shoulder structural type, and spool [13] working edge and valve pocket [12] return opening working edge have certain pre-opening amount, realize postiive gain Stress control.
3. direct drive Electric hydraulic pressure servo valve according to claim 1, it is characterized in that: described permanent magnetism differential linear force motor comprises permanent magnet [4], magnetic guiding loop [7], control coil [6], armature component [5], supported spring [2], stop collar [8], left cover [9], right cover [3] and bearing steel ball [10], armature component [5] is fixed on supported spring [2] by screw thread, permanent magnet [4], magnetic guiding loop [7] and stop collar [8] by glue bond in left cover [9] and right cover [3], control coil [6] is arranged between left cover [9] and right cover [3], a left side for armature component [5], right side and corresponding magnet case working surface form working gas gap, the left end of armature component [5] adopts bearing steel ball [10] to support, permanent magnetism differential linear force motor is installed on housing [11] by four screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420775600.0U CN204371811U (en) | 2014-12-10 | 2014-12-10 | A kind of direct drive Electric hydraulic pressure servo valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420775600.0U CN204371811U (en) | 2014-12-10 | 2014-12-10 | A kind of direct drive Electric hydraulic pressure servo valve |
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| Publication Number | Publication Date |
|---|---|
| CN204371811U true CN204371811U (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420775600.0U Active CN204371811U (en) | 2014-12-10 | 2014-12-10 | A kind of direct drive Electric hydraulic pressure servo valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230620A (en) * | 2019-07-09 | 2019-09-13 | 中国重型机械研究院股份公司 | A kind of low-power consumption high frequency actuation tiny leakage Hydraulic Logic Valve |
| CN110307201A (en) * | 2019-07-09 | 2019-10-08 | 中国重型机械研究院股份公司 | A kind of compact low-power consumption high-speed response No leakage hydraulic stop valve |
-
2014
- 2014-12-10 CN CN201420775600.0U patent/CN204371811U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230620A (en) * | 2019-07-09 | 2019-09-13 | 中国重型机械研究院股份公司 | A kind of low-power consumption high frequency actuation tiny leakage Hydraulic Logic Valve |
| CN110307201A (en) * | 2019-07-09 | 2019-10-08 | 中国重型机械研究院股份公司 | A kind of compact low-power consumption high-speed response No leakage hydraulic stop valve |
| CN110230620B (en) * | 2019-07-09 | 2024-04-09 | 中国重型机械研究院股份公司 | Low-power consumption high-frequency actuation micro-leakage hydraulic logic valve |
| CN110307201B (en) * | 2019-07-09 | 2024-04-09 | 中国重型机械研究院股份公司 | Compact type low-power consumption high-speed response leak-free hydraulic stop valve |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180620 Address after: 211102 Jiangning Development Zone, Nanjing, Nanjing, Jiangsu Province, 19 mailbox Patentee after: CAC Nanjing Servo Control System Co., Ltd. Address before: 211102 Jiangning Development Zone, Nanjing, Nanjing, Jiangsu Province, 19 mailbox Patentee before: AVIC Jincheng Nanjing Engineering Institute of Aircraft Systems |