CN100348873C - Digital input type electrohydraulic servo-valve - Google Patents
Digital input type electrohydraulic servo-valve Download PDFInfo
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- CN100348873C CN100348873C CNB2005100197237A CN200510019723A CN100348873C CN 100348873 C CN100348873 C CN 100348873C CN B2005100197237 A CNB2005100197237 A CN B2005100197237A CN 200510019723 A CN200510019723 A CN 200510019723A CN 100348873 C CN100348873 C CN 100348873C
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 238000004891 communication Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 230000010354 integration Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 9
- 238000013016 damping Methods 0.000 description 8
- 238000011109 contamination Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 2
- 238000004092 self-diagnosis Methods 0.000 description 2
- 230000007123 defense Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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Abstract
本发明涉及一种数字输入式电液伺服阀。其技术方案是：在阀盖[19]的上端设置有信号输入插座[1]，信号输入插座[1]与安装在阀盖[19]内的嵌入式数字伺服放大器[2]连接，嵌入式数字伺服放大器[2]与阀线圈[4]连接，在阀体[16]内装有主阀芯[7]，主阀芯[7]内装有先导阀芯[11]，先导阀芯[11]的上端与阀线圈[4]固定安装在一起，在阀线圈[4]下部设置有磁钢[6]，在阀线圈[4]的上下设有复位弹簧[18]。四个固定节流孔[14、15、9、13]呈U形串联布置，直径为1～1.2mm。两个第一固定节流孔[14、15]与两个第二固定节流孔[9、13]的油道距离为45～50mm。本发明具有集成度高、控制精度高、响应快、抗污染能力强的优点。
The invention relates to a digital input type electro-hydraulic servo valve. The technical solution is: a signal input socket [1] is provided on the upper end of the valve cover [19], and the signal input socket [1] is connected with the embedded digital servo amplifier [2] installed in the valve cover [19]. The digital servo amplifier [2] is connected with the valve coil [4], the main spool [7] is installed in the valve body [16], the pilot spool [11] is installed in the main spool [7], and the pilot spool [11] The upper end and the valve coil [4] are fixedly installed together, the valve coil [4] bottom is provided with a magnetic steel [6], and the valve coil [4] is provided with a return spring [18] up and down. The four fixed orifices [14, 15, 9, 13] are U-shaped and arranged in series, with a diameter of 1-1.2mm. The oil channel distance between the two first fixed orifices [14, 15] and the two second fixed orifices [9, 13] is 45-50mm. The invention has the advantages of high integration, high control precision, fast response and strong anti-pollution ability.
Description
Technical field
The invention belongs to a kind of electrohydraulic control.Relate in particular to a kind of digital input type electrohydraulic servo-valve.
Background technique
Electrohydraulic control is the core parts of hydraulic control system, and in industrial extensive application, it can be converted into large-power hydraulic output with low power electric energy input, and equipment is accurately controlled.Electrohydraulic control and servocontroller, Detecting element, actuator, instruction element are used, and can form different open loops or closed loop control system, as position control system, Force control system, speed control system etc.Electrohydraulic control generally can be divided into nozzle baffle type and slide valve electro-hydraulic servo valve, and slide valve electro-hydraulic servo valve can be divided into single-stage sliding valve and secondary guiding valve electrohydraulic control again.
At present, secondary guiding valve electrohydraulic control usually adopts two fixed orifices and two settable orifices to form full-bridges, to the main valve plug position control (Sun Wenzhi. hydraulic control system. Beijing. Beijing National Defense Industry Press, 1985), little because of the hydraulic system damping, the dynamic characteristic of valve is relatively poor; The size of its fixed orifice is less in addition, is stopped up by hydraulic oil internal contamination thing easily.So pollution problem is caused the fault of electrohydraulic servo system by servovalve more than 70%, cause servovalve to lose efficacy, its control accuracy and reliability are reduced, use and be subjected to narrow limitation.
Summary of the invention
The present invention seeks on the basis of secondary guiding valve electrohydraulic control, a kind of level of integration height, control accuracy height are provided, respond the digital input type electrohydraulic servo-valve fast, that contamination resistance is strong.
For achieving the above object, the technical solution adopted in the present invention is: the upper end at valve gap is provided with signal input socket, and the signal input socket Embedded Digital Servo amplifier interior with being installed in valve gap is connected, and the Embedded Digital Servo amplifier is connected with valve coil.Main valve plug is housed in valve body, guide's spool is housed in the main valve plug, the upper end and the valve coil of guide's spool are fixedly installed togather, and are provided with magnet steel in the valve coil bottom, have Returnning spring on valve coil.
Four fixed orifices tandem arrangement that takes the shape of the letter U, the processing of two first fixed orifices is at the middle part of main valve plug, two second fixed orifice processing are communicated with two first fixed orifices respectively on the top of main valve plug with two second fixed orifices, communicate with two settable orifices respectively again.Four fixed restriction bore dias are 1～1.2mm.
The P bore that described two first fixed orifices are processed respectively at main valve plug is on the position, and two second fixed orifices are processed respectively in the main valve plug inboard radial position corresponding with guide's spool convex shoulder; The oil duct distance of two first fixed orifices and two second fixed orifices is 45～50mm.
Described Embedded Digital Servo amplifier is that microprocessor, single-chip microcomputer, communication module, servoamplifier, boost pressure circuit are integrated in the control panel.Servoamplifier is connected with microprocessor, microprocessor is connected with single-chip microcomputer, single-chip microcomputer is connected with communication module, and boost pressure circuit is connected with servoamplifier; Microprocessor is connected with signal input socket respectively with communication module, and servoamplifier is connected with valve coil.The skeleton of valve coil is coated with the banded copper ring of one deck outward, forms the electric convolution damping ring.
Owing to adopt technique scheme, the present invention has level of integration height, control accuracy height, responds the advantage fast, that contamination resistance is strong, is in particular in:
1, the present invention is provided with the Embedded Digital Servo amplifier, has realized integrated with electrohydraulic control.This Embedded Digital Servo amplifier can carry out online self diagnosis to the fault of valve, and can realize remote monitoring and warning by field bus technique.
2, the present invention changes a minor diameter fixed orifice into two larger-diameter fixed orifices on structure, settable orifice pressure reduction significantly can be reduced, the aperture is extended to 1～1.2mm by original 0.7mm, and contamination resistance is greatly improved, and filter precision only needs 10～20 μ m.In addition, selecting the oil duct distance of fixed orifice is 45～50mm, has effectively prevented the influence of jet to fluidised form and restriction effect, makes that the control effect is optimized, servovalve stagnates, and ring is less than normal in 1% less than 3%, zero.
3, the present invention is coated with the banded copper ring of one deck outside the skeleton of valve coil, can produce independently electric eddy current type damping ring, has obtained optimum damping parameter, and its damping constant is reached about 0.7.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is the structural representation of main valve plug 7 among Fig. 1;
Fig. 3 is the structural representation of Embedded Digital Servo amplifier 2 among Fig. 1.
Embodiment
Below in conjunction with embodiment the present invention is further described: Fig. 1 is a kind of structural representation of the present invention.As shown in the figure, be provided with signal input socket 1 in the upper end of this device valve gap 19, signal input socket 1 is connected with Embedded Digital Servo amplifier 2 in being installed in valve gap 19, Embedded Digital Servo amplifier 2 is connected with valve coil 4, Embedded Digital Servo amplifier 2 can carry out online self diagnosis to the fault of this device, and can realize remote monitoring and warning by field bus technique.
For preventing the influence of jet to fluidised form and restriction effect, this device as shown in Figure 2, adopt four fixed orifices 14,15,9,13 tandem arrangement that takes the shape of the letter U, two first middle parts that fixed orifice 14,15 is processed at main valve plug 7, two second tops that fixed orifice 9,13 is processed at main valve plug 7, two first fixed orifices 14,15 are communicated with second fixed orifice 9,13 respectively, communicate with two settable orifices 10,12 respectively again.U-shaped 4 hole tandem arrangement can significantly reduce two settable orifices, 10,12 pressure reduction.
Two first fixed orifices 14,15 are processed respectively at the P of main valve plug 7 bore on the position, and two second fixed orifices 9,13 are processed respectively in the main valve plug 7 inboard radial position corresponding with guide's spool 11 convex shoulders.The oil duct distance of 14,15 and two second fixed orifices 9,13 of two first fixed orifices is 45～50mm.
In order to increase the resistance of pilot stage liquid, four fixed orifice 14,15,9,13 enlarged-diameter are 1～1.2mm, can strengthen contamination resistance simultaneously.
Embedded Digital Servo amplifier 2 is integrated in microprocessor 24, single-chip microcomputer 21, communication module 22, servoamplifier 25, boost pressure circuit 20 in the control panel 23 as shown in Figure 3.Servoamplifier 25 is connected with microprocessor 24, microprocessor 24 is connected with single-chip microcomputer 21, single-chip microcomputer 21 is connected with communication module 22, and boost pressure circuit 20 is connected with servoamplifier 25; Microprocessor 24 is connected with signal input socket 1 respectively with communication module 22, and servoamplifier 25 is connected with valve coil 4.
In Embedded Digital Servo amplifier 2, set up boost pressure circuit 20, can reduce the influence of the inertial element of valve coil 4 resistance and valve coil 4 inductance composition greatly, the frequency band of broadening servoamplifier 25.
In addition, be coated with the banded copper ring 5 of one deck outside the skeleton of valve coil 4, can form the electric convolution damping ring, can improve the damping of guide's spool 11, the damping constant of this device pilot stage is reached about 0.7, dynamic stability obviously improves.
The working principle of this device is: the control figure signal is delivered to Embedded Digital Servo amplifier 2 from signal input socket 1, be transported to valve coil 4 by producing corresponding control current after the computing, under the action of a magnetic field of magnet steel 6, energising valve coil 4 produces thrust and drives the 11 generation axial displacements of guide's spool, the orifice size of two settable orifices 10,12 is changed, and the liquid resistance is asymmetric; The guide controls oil by 14,15 and two second fixed orifices 9,13 of two first fixed orifices on the main valve plug 7 simultaneously, flows back to low pressure port T through settable orifice 10,12, constitutes U-shaped full-bridge control oil channel.The orifice size of settable orifice 10,12 changes, and the liquid resistance is asymmetric, causes U-shaped full-bridge imbalance, thereby causes that both sides guide's control-oil pressure does not wait.The guide controls oil and enters main valve plug 7 two ends through control oil duct 8,17 again, makes main valve plug 7 axially loaded imbalances, and generation moves axially, and the valve port of main valve plug 7 is changed, thereby control working connection flow changes.When main valve plug 7 axial displacements with after 11 axial displacements of guide's spool equate, the orifice size of two settable orifices 10,12 has equated again, liquid resistance symmetry, U-shaped full-bridge balance, both sides guide's control-oil pressure equates that main valve plug 7 axially loadeds restore balance, and axial motion stops, the valve port opening of main valve plug 7 remains unchanged, and the working connection flow also remains unchanged.
Claims (5)
1, a kind of digital input type electrohydraulic servo-valve, it is characterized in that being provided with signal input socket [1] in the upper end of valve gap [19], signal input socket [1] the Embedded Digital Servo amplifier [2] interior with being installed in valve gap [19] is connected, Embedded Digital Servo amplifier [2] is connected with valve coil [4], main valve plug [7] is housed in valve body [16], guide's spool [11] is housed in the main valve plug [7], the upper end of guide's spool [11] and valve coil [4] are fixedly installed togather, be provided with magnet steel [6] in valve coil [4] bottom, on valve coil [4], have Returnning spring [18];
Four fixed orifices [14,15,9,13] take the shape of the letter U tandem arrangement, two first fixed orifices [14,15] processing is at the middle part of main valve plug [7], two second fixed orifices [9,13] processing is on the top of main valve plug [7], two first fixed orifices [14,15] are communicated with two second fixed orifices [9,13] respectively, communicate with two settable orifices [10,12] respectively again.
2, digital input type electrohydraulic servo-valve according to claim 1, it is characterized in that described two first fixed orifices [14,15] process P bore at main valve plug [7] respectively on the position, two second fixed orifices [9,13] are processed respectively in main valve plug [7] the inboard radial position corresponding with guide's spool [11] convex shoulder; Two first fixed orifices [14,15] are 45～50mm with the oil duct distance of two second fixed orifices [9,13].
3,, it is characterized in that described fixed orifice [14,15,9,13] diameter is 1～1.2mm according to claim 1 or 2 described digital input type electrohydraulic servo-valves.
4, digital input type electrohydraulic servo-valve according to claim 1 is characterized in that described Embedded Digital Servo amplifier [2] is with microprocessor [24], single-chip microcomputer [21], communication module [22], servoamplifier [25], boost pressure circuit [20], is integrated in the control panel [23]; Servoamplifier [25] is connected with microprocessor [24], microprocessor [24] is connected with single-chip microcomputer [21], single-chip microcomputer [21] is connected with communication module [22], and boost pressure circuit [20] is connected with servoamplifier [25]; Microprocessor [24] is connected with signal input socket [1] respectively with communication module [22], and servoamplifier [25] is connected with valve coil [4].
5, digital input type electrohydraulic servo-valve according to claim 1 is characterized in that the skeleton of described valve coil [4] is coated with the banded copper ring [5] of one deck outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100197237A CN100348873C (en) | 2005-11-03 | 2005-11-03 | Digital input type electrohydraulic servo-valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100197237A CN100348873C (en) | 2005-11-03 | 2005-11-03 | Digital input type electrohydraulic servo-valve |
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| CN1752465A CN1752465A (en) | 2006-03-29 |
| CN100348873C true CN100348873C (en) | 2007-11-14 |
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| CNB2005100197237A Expired - Fee Related CN100348873C (en) | 2005-11-03 | 2005-11-03 | Digital input type electrohydraulic servo-valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839364A (en) * | 2010-04-29 | 2010-09-22 | 浙江工业大学 | Chatter compensation method for hysteresis-loop nonlinearity of digital-valve transmission mechanism |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213243B (en) * | 2011-06-01 | 2014-03-26 | 武汉科技大学 | Composite high-efficiency high-flow servo valve |
| CN103615423A (en) * | 2013-12-04 | 2014-03-05 | 中国航空工业第六一八研究所 | Electro-hydraulic servo valve sleeve locating structure |
| CN111404493B (en) * | 2020-04-26 | 2024-04-09 | 广东海洋大学 | Electrohydraulic servo valve digital amplifier with safety protection and built-in test functions |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4378031A (en) * | 1979-05-22 | 1983-03-29 | Koehring Company | Electrohydraulic servovalve |
| GB2158971A (en) * | 1984-02-22 | 1985-11-20 | Koehring Co | Digital servovalve structure and method |
| US5573036A (en) * | 1996-01-11 | 1996-11-12 | Sargent Controls & Aerospace/Dover Diversified Inc. | Electro-hydraulic servovalve having mechanical feedback |
| CN1163657A (en) * | 1994-11-16 | 1997-10-29 | 哈埃教路士有限公司 | Pilot controlled servo-valve |
| JPH10331997A (en) * | 1997-05-30 | 1998-12-15 | Tokimec Inc | Electrohydraulic servo valve |
| CN2572033Y (en) * | 2002-09-16 | 2003-09-10 | 刘长青 | Two-stage electrohydraulic digital servo valve |
-
2005
- 2005-11-03 CN CNB2005100197237A patent/CN100348873C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4378031A (en) * | 1979-05-22 | 1983-03-29 | Koehring Company | Electrohydraulic servovalve |
| GB2158971A (en) * | 1984-02-22 | 1985-11-20 | Koehring Co | Digital servovalve structure and method |
| CN1163657A (en) * | 1994-11-16 | 1997-10-29 | 哈埃教路士有限公司 | Pilot controlled servo-valve |
| US5573036A (en) * | 1996-01-11 | 1996-11-12 | Sargent Controls & Aerospace/Dover Diversified Inc. | Electro-hydraulic servovalve having mechanical feedback |
| JPH10331997A (en) * | 1997-05-30 | 1998-12-15 | Tokimec Inc | Electrohydraulic servo valve |
| CN2572033Y (en) * | 2002-09-16 | 2003-09-10 | 刘长青 | Two-stage electrohydraulic digital servo valve |
Non-Patent Citations (1)
| Title |
|---|
| 动圈式伺服阀中串联液阻的分析计算 宋学义.液压气动与密封，第1983年04期 1983 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839364A (en) * | 2010-04-29 | 2010-09-22 | 浙江工业大学 | Chatter compensation method for hysteresis-loop nonlinearity of digital-valve transmission mechanism |
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| CN1752465A (en) | 2006-03-29 |
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