CN105626925A - Driving mechanism for digital valve - Google Patents
Driving mechanism for digital valve Download PDFInfo
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- CN105626925A CN105626925A CN201410586488.0A CN201410586488A CN105626925A CN 105626925 A CN105626925 A CN 105626925A CN 201410586488 A CN201410586488 A CN 201410586488A CN 105626925 A CN105626925 A CN 105626925A
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- driving mechanism
- rotor
- hollow axle
- digital valve
- screw nut
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Abstract
The invention belongs to the field of hydraulic control and particularly relates to a driving mechanism for a digital valve. The driving mechanism comprises a stator, a rotor, a hollow shaft, a lead screw nut, a lead screw and an angular displacement sensor. The rotating magnetic potential generated by the stator drives the rotor, the hollow shaft and the lead screw nut to rotate synchronously, the lead screw nut drives the lead screw to move linearly so as to provide driving force for a load, and the angular displacement sensor is used for monitoring the angular displacement and the angular velocity of the rotor, so that closed-loop control is achieved. By the adoption of the driving mechanism for the digital valve, the technical problem that in the prior art, digital control cannot be conducted directly is solved, and the controllability is good.
Description
Technical field
The invention belongs to field of hydraulic control, be specifically related to a kind of digital valve driving mechanism.
Background technology
Along with developing rapidly of modern electronic technology, digital control technology has been widely used in the middle of electro-hydraulic servo control now, forms novel digital servo valve.
Electromechanical transducer, as the wholly or principally ingredient of servo valve drive part, is also the core component of electrohydraulic servo valve, is connect the bridge between the signal of telecommunication and mechanical action, it is possible to real-time input electrical signal is converted to mechanical action. The overall performance of electrohydraulic servo valve is played conclusive influence by the performance of electromechanical transducer, and therefore the research of high-performance electric machinery transducer is always up one of important directions of electro-hydraulic servo control technical research for a long time.
Traditional electromechanical transducer includes the forms such as permanent-magnet moving-iron torque-motor, moving-coil type torque-motor, linear force motor, proportion electro-magnet, and new function material electromechanical transducer relates to the materials such as piezoelectric ceramics (PZT), electrostriction material (PMN), giant magnetostrictive material (GMM), marmem (SMA). Above electromechanical transducer exists and can not be made directly digital control, and capacity of resisting disturbance and reliability are poor, and controllability can be good not, and the shortcoming such as driving force is limited.
In recent years, improvement along with Servo motor drive control, its rapidity and precision are also improving constantly, and control method reaches its maturity, direct digital control can be carried out, and himself just can realize closed loop/half-closed loop control, has significantly high cost performance, in actual application and observing, servomotor is increasingly becoming the ideal element of electromagnetic direct-drive formula electrohydraulic servo valve electromechanical transducer.
Summary of the invention
The technical issues that need to address of the present invention are: the existence of existing electromechanical transducer can not be made directly digital control, and controllability can be difficult to meet technology requirement.
Present invention employs following technical scheme:
A kind of digital valve driving mechanism, including stator and rotor, described rotor is nested in stator interior, and the rotating magnetic potential that stator produces drives rotor to rotate; Digital valve driving mechanism also includes hollow axle, feed screw nut, screw mandrel and angular displacement sensor: described hollow axle is nested in internal rotor, its boring part is provided with the screw mandrel installing feed screw nut, feed screw nut outer wall and inner wall of hollow shaft are relatively fixed, the rotary motion that can make rotor passes to feed screw nut by hollow axle, and then carry out rectilinear motion by the screw mandrel that rotarily drives of feed screw nut at axis direction, leading screw stretches out from hollow axle, and the external mechanical interface as driving mechanism provides driving force for load; Described angular displacement sensor is used for monitoring rotor angular displacement and angular velocity, numeral angular signal is fed back to the digitial controller that digital valve actuator configuration is special, described signal and digitial controller are received digital command signal compare, and then by certain control algolithm output control instruction, complete being precisely controlled position.
Preferably: described hollow axle initial and end two ends are respectively provided with an angular contact ball bearing.
Preferably: described stator is sat shoulder by the stop of enclosure interior and stator shaft orientation fixture carries out axial restraint; Described rotor is sat shoulder by the stop of rotor axial fixture and hollow axle outer surface and is lock onto outside hollow axle; Described feed screw nut is reinforced with hollow axle by key; Rotor, hollow axle and feed screw nut rotate as an Integral synchronous; Described angular displacement sensor is arranged at hollow axle tail end, carries out axial restraint by angular displacement sensor fixture.
Preferably: described hollow axle tail end is provided with hollow shaft-cup.
Preferably: digital valve driving mechanism also includes dust cap, is fixed with support lid and the sealing member of cable fixing head, for digital valve driving mechanism is carried out overall package.
The invention has the beneficial effects as follows:
(1) a kind of digital valve driving mechanism of the present invention, the digitial controller that digital valve actuator configuration is special, it receives digital command signal and the digital angular signal having angular displacement sensor to feed back to, two signals are compared and obtains error signal, and then by certain control algolithm output control instruction, complete being precisely controlled position;
(2) a kind of digital valve driving mechanism of the present invention, by adopting pair of horns contact ball bearing to provide radial and axial support for hollow axle, guarantee stator and rotor radial running clearance under any operating condition uniformly and have certain rigidity, and effectively prevent the impact on rotor-position of the load biaxially power, also the loading section that drives for such as big traffic figure valve core of servo valve provides the firm reference that moves axially, and has that capacity of resisting disturbance is strong and the feature of good reliability;
(3) a kind of digital valve driving mechanism of the present invention, by using hollow axle, solves the connected mode of feed screw nut and rotor cleverly, leading screw is built in hollow axle, effectively reduce the volume of driving mechanism;
(4) a kind of digital valve driving mechanism of the present invention, rotor, hollow axle and feed screw nut rotate as an Integral synchronous, effectively reduce transmission error;
(5) a kind of digital valve driving mechanism of the present invention, described hollow axle tail end is provided with hollow shaft-cup, it is simple to the replacing adjustment of angular displacement sensor;
(6) a kind of digital valve driving mechanism of the present invention, most high frequency sound can reach 30HZ, maximum driving force can reach 2000N, has good driving force, it is possible to as the drive part of big traffic figure servo valve.
Accompanying drawing explanation
Fig. 1 is a kind of digital valve driving mechanism structure schematic diagram of the present invention;
In figure, 1-sealing member, 2-housing, 3-angular contact ball bearing, 4-rotor axial fixture, 5-hollow axle, 6-screw mandrel, 7-feed screw nut, 8-stator, 9-rotor, 10-key, the hollow shaft-cup of 11-, 12-stator shaft orientation fixture, 13-support lid, 14-cable fixing head, 15-angular displacement sensor fixture, 16-angular displacement sensor, 17-dust cap.
Detailed description of the invention
Below in conjunction with drawings and Examples, a kind of digital valve driving mechanism of the present invention is described further.
Embodiment 1
As it is shown in figure 1, the digital valve driving mechanism in the present embodiment, including stator 8, rotor 9, hollow axle 5, feed screw nut 7, screw mandrel 6 and angular displacement sensor 16.
It is internal that described rotor 9 is nested in stator 8, flows through stator 8 three-phase windings when controlling electric current, drives rotor 9 to rotate when producing rotating magnetic potential; It is internal that described hollow axle 5 is nested in rotor 9, its boring part is provided with the screw mandrel 6 installing feed screw nut 7, feed screw nut 7 outer wall and hollow axle 5 inwall are relatively fixed, the rotary motion that can make rotor 9 passes to feed screw nut 7 by hollow axle 5, and then carry out rectilinear motion by the screw mandrel 6 that rotarily drives of feed screw nut 7 at axis direction, leading screw stretches out from hollow axle 5 head end, and the external mechanical interface as driving mechanism provides driving force for load; Described angular displacement sensor 16 is used for monitoring rotor 9 angular displacement and angular velocity, the digitial controller that digital valve actuator configuration is special, the digital angular signal that its reception digital command signal and angular displacement sensor 16 feed back to, two signals are compared and obtains error signal, and then by certain control algolithm output control instruction, complete being precisely controlled position.
Embodiment 2
The present embodiment and embodiment 1 are distinctive in that:
Hollow axle 5 initial and end two ends are respectively provided with an angular contact ball bearing 3, for providing radial and axial support for hollow axle 5, guarantee stator 8 and rotor 9 radially running clearance under any operating condition uniformly and have certain rigidity, and effectively prevent the impact on rotor 9 position of the load biaxially power, also drive loading section to provide firm to move axially reference for such as big traffic figure valve core of servo valve.
Embodiment 3
The present embodiment and above-mentioned two embodiment are distinctive in that:
Shoulder is sat in the stop within housing 2 of the described stator 8 and stator shaft orientation fixture 12 carries out axial restraint, and guarantees that stator 8 end circle is not less than 2 millimeters to the gap of housing 2.
Described rotor 9 is sat shoulder by the stop of rotor axial fixture 4 and hollow axle 5 outer surface and is lock onto hollow axle 5 outside. Described feed screw nut 7 is reinforced by key 10 and hollow axle 5, it is achieved the synchronous rotary of the two. Rotor 9, hollow axle 5 and feed screw nut 7 rotate as an Integral synchronous, effectively reduce transmission error.
Described angular displacement sensor 16 is arranged at hollow axle 5 tail end, carries out axial restraint by angular displacement sensor fixture 15. Preferably, described hollow axle 5 tail end is provided with hollow shaft-cup 11, it is simple to angular displacement sensor 16 receives numeral angular signal.
Embodiment 4
The present embodiment and above three embodiment are distinctive in that:
Digital valve driving mechanism in the present embodiment also includes dust cap 17, is fixed with support lid 13 and the sealing member 1 of cable fixing head 14, for digital valve driving mechanism is carried out overall package.
Above in conjunction with drawings and Examples, the present invention is explained in detail, but the present invention is not limited to above-described embodiment, in the ken that those of ordinary skill in the art possess, it is also possible under the premise without departing from present inventive concept, make various change. The content not being described in detail in the present invention all can adopt prior art.
Claims (5)
1. digital valve driving mechanism, including stator (8) and rotor (9), it is internal that described rotor (9) is nested in stator (8), and the rotating magnetic potential that stator (8) produces drives rotor (9) to rotate, it is characterized in that: digital valve driving mechanism also includes hollow axle (5), feed screw nut (7), screw mandrel (6) and angular displacement sensor (16): it is internal that described hollow axle (5) is nested in rotor (9), its boring part is provided with the screw mandrel (6) installing feed screw nut (7), feed screw nut (7) outer wall and hollow axle (5) inwall are relatively fixed, the rotary motion that can make rotor (9) passes to feed screw nut (7) by hollow axle (5), and then carry out rectilinear motion by the screw mandrel (6) that rotarily drives of feed screw nut (7) at axis direction, leading screw stretches out from hollow axle (5), external mechanical interface as driving mechanism provides driving force for load, described angular displacement sensor (16) is used for monitoring rotor (9) angular displacement and angular velocity, numeral angular signal is fed back to the digitial controller that digital valve actuator configuration is special, described signal and digitial controller are received digital command signal compare, and then by certain control algolithm output control instruction, complete being precisely controlled position.
2. digital valve driving mechanism according to claim 1, it is characterised in that: described hollow axle (5) initial and end two ends are respectively provided with an angular contact ball bearing (3).
3. digital valve driving mechanism according to claim 1 and 2, it is characterised in that:
Described stator (8) is sat shoulder by the stop that housing (2) is internal and stator shaft orientation fixture (12) carries out axial restraint;
Described rotor (9) is sat shoulder by the stop of rotor axial fixture (4) and hollow axle (5) outer surface and is lock onto hollow axle (5) outside; Described feed screw nut (7) is reinforced with hollow axle (5) by key (10); Rotor (9), hollow axle (5) and feed screw nut (7) rotate as an Integral synchronous;
Described angular displacement sensor (16) is arranged at hollow axle (5) tail end, carries out axial restraint by angular displacement sensor fixture (15).
4. digital valve driving mechanism according to claim 3, it is characterised in that: described hollow axle (5) tail end is provided with hollow shaft-cup (11).
5. digital valve driving mechanism according to claim 1 and 2, it is characterized in that: digital valve driving mechanism also includes dust cap (17), is fixed with support lid (13) and the sealing member (1) of cable fixing head (14), for digital valve driving mechanism is carried out overall package.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410586488.0A CN105626925A (en) | 2014-10-28 | 2014-10-28 | Driving mechanism for digital valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410586488.0A CN105626925A (en) | 2014-10-28 | 2014-10-28 | Driving mechanism for digital valve |
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| Publication Number | Publication Date |
|---|---|
| CN105626925A true CN105626925A (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410586488.0A Pending CN105626925A (en) | 2014-10-28 | 2014-10-28 | Driving mechanism for digital valve |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60196477A (en) * | 1984-03-21 | 1985-10-04 | Saginomiya Seisakusho Inc | Motor-driven control valve |
| US20050264113A1 (en) * | 2004-05-25 | 2005-12-01 | Minebea Co., Ltd. | Actuator including rotor case and housing with sealing unit for hermetic structure |
| US20130214187A1 (en) * | 2012-02-22 | 2013-08-22 | Delphi Technologies, Inc. | Solenoid-actuated pressure control valve |
| CN103438243A (en) * | 2013-09-24 | 2013-12-11 | 淮海工学院 | Incremental electro-hydraulic digital flow control valve with double valve cores rotating oppositely |
| CN103591068A (en) * | 2013-08-21 | 2014-02-19 | 西安交通大学 | Spiral direct-drive electric-hydraulic proportional flow valve with hollow permanent-magnet alternating-current servo motor |
| US20140145101A1 (en) * | 2012-11-27 | 2014-05-29 | Denso Corporation | Electromagnetic valve device for high-pressure fluid |
-
2014
- 2014-10-28 CN CN201410586488.0A patent/CN105626925A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60196477A (en) * | 1984-03-21 | 1985-10-04 | Saginomiya Seisakusho Inc | Motor-driven control valve |
| US20050264113A1 (en) * | 2004-05-25 | 2005-12-01 | Minebea Co., Ltd. | Actuator including rotor case and housing with sealing unit for hermetic structure |
| US20130214187A1 (en) * | 2012-02-22 | 2013-08-22 | Delphi Technologies, Inc. | Solenoid-actuated pressure control valve |
| US20140145101A1 (en) * | 2012-11-27 | 2014-05-29 | Denso Corporation | Electromagnetic valve device for high-pressure fluid |
| CN103591068A (en) * | 2013-08-21 | 2014-02-19 | 西安交通大学 | Spiral direct-drive electric-hydraulic proportional flow valve with hollow permanent-magnet alternating-current servo motor |
| CN103438243A (en) * | 2013-09-24 | 2013-12-11 | 淮海工学院 | Incremental electro-hydraulic digital flow control valve with double valve cores rotating oppositely |
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Application publication date: 20160601 |