CN105546175A - Connection structure of four-redundancy sensor and servo valve body, and zero position adjustment method - Google Patents
Connection structure of four-redundancy sensor and servo valve body, and zero position adjustment method Download PDFInfo
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- CN105546175A CN105546175A CN201510960564.4A CN201510960564A CN105546175A CN 105546175 A CN105546175 A CN 105546175A CN 201510960564 A CN201510960564 A CN 201510960564A CN 105546175 A CN105546175 A CN 105546175A
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- adjustment sleeve
- sensor
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
Abstract
The invention belongs to the field of design of servo valves and relates to a connection structure of a four-redundancy sensor and a servo valve body, and a zero position adjustment method. The connection structure is characterized in that an internal thread section is arranged in a left port of a servo valve installation hole of the valve body (8); an adjustment mechanism is composed of a sensor fixing screw (2), an adjustment sleeve (3), a lock nut (4), a sensor body sealing ring (9) and an adjustment sleeve sealing ring (10). The zero position adjustment method comprises the steps of dismounting the sensor fixing screw (2), determining the adjustment direction and adjusting the electrical zero position. The connection structure of the four-redundancy sensor and the servo valve body, and the zero position adjustment method provided by the invention achieve zero position adjustment of the four-redundancy sensor.
Description
Technical field
The invention belongs to servovalve design field, relate to linkage structure and the zero-bit regulating method of a kind of four redundancy sensors and servovalve valve body.
Background technique
Current a kind of four redundancy sensors and the linkage structure of servovalve valve body are: it comprises four redundancy sensors, nut, valve core of servo valve and valve body; Four redundancy sensors comprise sensor body and coupling shaft, sensor mandrel that the left end of coupling shaft is parallel to each other with four, that be uniformly distributed along the circumference is connected, four sensor mandrels can unrestricted motion in the sensor mandrel mounting hole vertically in sensor body, the outside thread of coupling shaft right-hand member is screwed in the tapped hole of valve core of servo valve left end, by nut by valve core of servo valve and coupling shaft locking.Sensor body is positioned at the left port of the servovalve mounting hole of valve body and keeps Spielpassung, is fixed on valve body by the mounting flange in sensor body by screw.The shortcoming of this structure is: the zero-bit that cannot realize four redundancy sensors regulates, and therefore, must design a kind of regulation structure, and the zero-bit realizing four redundancy sensors regulates.
Summary of the invention
The object of the invention is: the linkage structure and the zero-bit regulating method that propose a kind of four redundancy sensors and servovalve valve body, so that the zero-bit realizing four redundancy sensors regulates.
Technological scheme of the present invention is: the linkage structure of a kind of four redundancy sensors and servovalve valve body, comprises four redundancy sensors, nut 6, valve core of servo valve 7 and valve body 8; Four redundancy sensors comprise sensor body 1 and coupling shaft 5, sensor mandrel that the left end of coupling shaft 5 is parallel to each other with four, that be uniformly distributed along the circumference is connected, four sensor mandrels can unrestricted motion in the sensor mandrel mounting hole vertically in sensor body 1, the outside thread of coupling shaft 5 right-hand member is screwed in the tapped hole of valve core of servo valve 7 left end, valve core of servo valve 7 and coupling shaft 5 is locked by nut 6; It is characterized in that:
A, in the left port of valve body 8 servovalve mounting hole, there is one section of internal thread segment;
B, by the controlling mechanism be made up of sensor set screw 2, adjustment sleeve 3, locking nut 4, sensor body seal ring 9 and adjustment sleeve seal ring 10, adjustment sleeve 3 is cylinders with Step Shaft profile, the external diameter of left section of axle of adjustment sleeve 3 is greater than the external diameter of right section of axle, adjustment sleeve 3 right sections of axles are divided into again 2 sections, left section of adjustment sleeve 3 right sections of axles is external thread section, right section is optical axis section, this optical axis section has adjustment sleeve external sealed groove, adjustment sleeve seal ring 10 is positioned at adjustment sleeve seal groove, the endoporus of adjustment sleeve 3 is step holes that left sector hole internal diameter is greater than right sector hole internal diameter, the left sector hole inwall of adjustment sleeve 3 endoporus there is seal groove in adjustment sleeve, sensor body seal ring 9 is positioned at adjustment sleeve seal groove, the left side of adjustment sleeve 3 has 6, 9 or 12 tapped blind holes be uniformly distributed along the circumference, the external thread section of adjustment sleeve 3 is screwed in the internal thread segment of valve body 8 servovalve mounting hole, the optical axis section of adjustment sleeve 3 to enter in the unthreaded hole on the right of valve body 8 servovalve mounting hole internal thread segment and keeps Spielpassung, and locking nut 4 is combined with the external thread section of adjustment sleeve 3 and is locked by the axial position of adjustment sleeve 3, sensor body 1 has mounting flange 1a, mounting flange 1a has the circular hole 1b that 3 are uniformly distributed along the circumference, central angle alpha=60 corresponding to each circular hole 1b ° ~ 90 °, sensor body 1 is positioned at the left sector hole of adjustment sleeve 3 endoporus and keeps Spielpassung, is fixed in the left port of adjustment sleeve 3 by mounting flange 1a by sensor set screw 2.
The transducer zeroing regulating method of linkage structure as described above, after spool zero-bit regulates, carry out transducer zeroing adjustment, it is characterized in that, the step that zero-bit regulates is as follows: the electrical null position of measuring transducer, if meet the requirements, then transducer zeroing regulates complete; If undesirable, carry out transducer zeroing adjustment by the following method:
1, sensor set screw 2 is pulled down, extracting sensor body 1;
2, determine to regulate direction: unclamp locking nut 4, any selection clockwise or counterclockwise rotary regulating sleeve 3, insert sensor body 1, to screw on sensor set screw 2, tighten locking nut 4, the electrical null position of measuring transducer, if electrical null position deviation reduces, then selected sense of rotation is for regulating direction; Otherwise being then reversed of selected sense of rotation regulates direction;
3, electrical null position is regulated: pull down sensor set screw 2, extracting sensor body 1, unclamp locking nut 4, according to adjustment direction rotary regulating sleeve 3, angle of swing is 10 ° ~ 90 °, insert sensor body 1, to screw on sensor set screw 2, tighten locking nut 4, the electrical null position of measuring transducer, if meet the requirements, then transducer zeroing regulates complete; If undesirable, then new adjustment direction is the direction reducing electrical null position deviation, repeatedly regulates according to the method described above, until meet the requirements.
Advantage of the present invention is: the linkage structure and the zero-bit regulating method that propose a kind of four redundancy sensors and servovalve valve body, and the zero-bit achieving four redundancy sensors regulates.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the left view of sensor body 1 in the present invention.
Embodiment
Below the present invention is described in further detail.See Fig. 1, the linkage structure of a kind of four redundancy sensors and servovalve valve body, comprises four redundancy sensors, nut 6, valve core of servo valve 7 and valve body 8; Four redundancy sensors comprise sensor body 1 and coupling shaft 5, sensor mandrel that the left end of coupling shaft 5 is parallel to each other with four, that be uniformly distributed along the circumference is connected, four sensor mandrels can unrestricted motion in the sensor mandrel mounting hole vertically in sensor body 1, the outside thread of coupling shaft 5 right-hand member is screwed in the tapped hole of valve core of servo valve 7 left end, valve core of servo valve 7 and coupling shaft 5 is locked by nut 6; It is characterized in that:
A, in the left port of valve body 8 servovalve mounting hole, there is one section of internal thread segment;
B, by the controlling mechanism be made up of sensor set screw 2, adjustment sleeve 3, locking nut 4, sensor body seal ring 9 and adjustment sleeve seal ring 10, adjustment sleeve 3 is cylinders with Step Shaft profile, the external diameter of left section of axle of adjustment sleeve 3 is greater than the external diameter of right section of axle, adjustment sleeve 3 right sections of axles are divided into again 2 sections, left section of adjustment sleeve 3 right sections of axles is external thread section, right section is optical axis section, this optical axis section has adjustment sleeve external sealed groove, adjustment sleeve seal ring 10 is positioned at adjustment sleeve seal groove, the endoporus of adjustment sleeve 3 is step holes that left sector hole internal diameter is greater than right sector hole internal diameter, the left sector hole inwall of adjustment sleeve 3 endoporus there is seal groove in adjustment sleeve, sensor body seal ring 9 is positioned at adjustment sleeve seal groove, the left side of adjustment sleeve 3 has 6, 9 or 12 tapped blind holes be uniformly distributed along the circumference, the external thread section of adjustment sleeve 3 is screwed in the internal thread segment of valve body 8 servovalve mounting hole, the optical axis section of adjustment sleeve 3 to enter in the unthreaded hole on the right of valve body 8 servovalve mounting hole internal thread segment and keeps Spielpassung, and locking nut 4 is combined with the external thread section of adjustment sleeve 3 and is locked by the axial position of adjustment sleeve 3, sensor body 1 has mounting flange 1a, mounting flange 1a has the circular hole 1b that 3 are uniformly distributed along the circumference, central angle alpha=60 corresponding to each circular hole 1b ° ~ 90 °, sensor body 1 is positioned at the left sector hole of adjustment sleeve 3 endoporus and keeps Spielpassung, is fixed in the left port of adjustment sleeve 3 by mounting flange 1a by sensor set screw 2.
The transducer zeroing regulating method of linkage structure as described above, after spool zero-bit regulates, carry out transducer zeroing adjustment, it is characterized in that, the step that zero-bit regulates is as follows: the electrical null position of measuring transducer, if meet the requirements, then transducer zeroing regulates complete; If undesirable, carry out transducer zeroing adjustment by the following method:
1, sensor set screw 2 is pulled down, extracting sensor body 1;
2, determine to regulate direction: unclamp locking nut 4, any selection clockwise or counterclockwise rotary regulating sleeve 3, insert sensor body 1, to screw on sensor set screw 2, tighten locking nut 4, the electrical null position of measuring transducer, if electrical null position deviation reduces, then selected sense of rotation is for regulating direction; Otherwise being then reversed of selected sense of rotation regulates direction;
3, electrical null position is regulated: pull down sensor set screw 2, extracting sensor body 1, unclamp locking nut 4, according to adjustment direction rotary regulating sleeve 3, angle of swing is 10 ° ~ 90 °, insert sensor body 1, to screw on sensor set screw 2, tighten locking nut 4, the electrical null position of measuring transducer, if meet the requirements, then transducer zeroing regulates complete; If undesirable, then new adjustment direction is the direction reducing electrical null position deviation, repeatedly regulates according to the method described above, until meet the requirements.Working principle of the present invention is: utilize the left sector hole inwall of the optical axis section of adjustment sleeve 3, adjustment sleeve 3 endoporus and corresponding seal ring to realize the sealing of fluid; The degree of depth utilizing adjustment sleeve 3 outside thread to be screwed into valve body 8 servovalve mounting hole screw thread regulates to realize transducer zeroing; The circular hole 1b utilizing special angle to design, adjustment sleeve 3 upper bolt aperture given number realize the fixing of sensor body.
Embodiment: the zero-bit of certain four redundancy sensor requires to be ± 10mV, and current measurement value is 50mV, and adjustment process is: pull down sensor set screw 2, extracting sensor body 1; Unclamp locking nut 4, clockwise direction rotary regulating sleeve 3 about 30 °, insert sensor body 1, to screw on sensor set screw 2, tighten locking nut 4, the electrical null position of measuring transducer, finding that electrical null position deviation is decreased to 30mV, showing that selected sense of rotation is for regulating direction; Continue to pull down sensor set screw 2, extracting sensor body 1, unclamps locking nut 4, according to clockwise direction rotary regulating sleeve 3, angle of swing is 90 °, insert sensor body 1, sensor set screw 2 of screwing on, tightens locking nut 4, the electrical null position of measuring transducer, find that electrical null position deviation is-5mV, meet the requirements, transducer zeroing regulates complete.
Claims (2)
1. a linkage structure for four redundancy sensors and servovalve valve body, comprises four redundancy sensors, nut (6), valve core of servo valve (7) and valve body (8); Four redundancy sensors comprise sensor body (1) and coupling shaft (5), sensor mandrel that the left end of coupling shaft (5) is parallel to each other with four, that be uniformly distributed along the circumference is connected, four sensor mandrels can unrestricted motion in the sensor mandrel mounting hole vertically in sensor body (1), the outside thread of coupling shaft (5) right-hand member is screwed in the tapped hole of valve core of servo valve (7) left end, by nut (6) by valve core of servo valve (7) and coupling shaft (5) locking; It is characterized in that:
A, in the left port of valve body (8) servovalve mounting hole, there is one section of internal thread segment;
B, there is the controlling mechanism be made up of sensor set screw (2), adjustment sleeve (3), locking nut (4), sensor body seal ring (9) and adjustment sleeve seal ring (10), adjustment sleeve (3) is a cylinder with Step Shaft profile, the external diameter of left section of axle of adjustment sleeve (3) is greater than the external diameter of right section of axle, adjustment sleeve (3) right section of axle is divided into again 2 sections, left section of adjustment sleeve (3) right section of axle is external thread section, right section is optical axis section, this optical axis section has adjustment sleeve external sealed groove, adjustment sleeve seal ring (10) is positioned at adjustment sleeve seal groove, the endoporus of adjustment sleeve (3) is the step hole that left sector hole internal diameter is greater than right sector hole internal diameter, the left sector hole inwall of adjustment sleeve (3) endoporus there is seal groove in adjustment sleeve, sensor body seal ring (9) is positioned at adjustment sleeve seal groove, the left side of adjustment sleeve (3) has 6, 9 or 12 tapped blind holes be uniformly distributed along the circumference, the external thread section of adjustment sleeve (3) is screwed in the internal thread segment of valve body (8) servovalve mounting hole, the optical axis section of adjustment sleeve (3) to enter in the unthreaded hole on the right of valve body (8) servovalve mounting hole internal thread segment and keeps Spielpassung, and locking nut (4) is combined with the external thread section of adjustment sleeve (3) and is locked by the axial position of adjustment sleeve (3), sensor body (1) has mounting flange (1a), mounting flange (1a) has 3 circular holes be uniformly distributed along the circumference (1b), central angle alpha=60 corresponding to each circular hole (1b) ° ~ 90 °, sensor body (1) is positioned at the left sector hole of adjustment sleeve (3) endoporus and keeps Spielpassung, is fixed in the left port of adjustment sleeve (3) by mounting flange (1a) by sensor set screw (2).
2. the transducer zeroing regulating method of linkage structure as claimed in claim 1, after spool zero-bit regulates, carry out transducer zeroing adjustment, it is characterized in that, the step that zero-bit regulates is as follows: the electrical null position of measuring transducer, if meet the requirements, then transducer zeroing regulates complete; If undesirable, carry out transducer zeroing adjustment by the following method:
2.1, sensor set screw (2) is pulled down, extracting sensor body (1);
2.2, determine to regulate direction: unclamp locking nut (4), any selection clockwise or counterclockwise rotary regulating sleeve (3), insert sensor body (1), to screw on sensor set screw (2), tighten locking nut (4), the electrical null position of measuring transducer, if electrical null position deviation reduces, then selected sense of rotation is for regulating direction; Otherwise being then reversed of selected sense of rotation regulates direction;
2.3, electrical null position is regulated: pull down sensor set screw (2), extracting sensor body (1), unclamp locking nut (4), according to adjustment direction rotary regulating sleeve (3), angle of swing is 10 ° ~ 90 °, insert sensor body (1), to screw on sensor set screw (2), tighten locking nut (4), the electrical null position of measuring transducer, if meet the requirements, then transducer zeroing regulates complete; If undesirable, then new adjustment direction is the direction reducing electrical null position deviation, repeatedly regulates according to the method described above, until meet the requirements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510960564.4A CN105546175B (en) | 2015-12-21 | 2015-12-21 | The attachment structure and zero-bit adjusting method of a kind of four redundancy sensor and servo valve body |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510960564.4A CN105546175B (en) | 2015-12-21 | 2015-12-21 | The attachment structure and zero-bit adjusting method of a kind of four redundancy sensor and servo valve body |
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| CN105546175A true CN105546175A (en) | 2016-05-04 |
| CN105546175B CN105546175B (en) | 2017-12-05 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109296578A (en) * | 2018-11-29 | 2019-02-01 | 上海航天控制技术研究所 | A kind of triple redundance electrohydraulic servo valve zero-bit combination adjustment device and its method of adjustment |
| CN109404721A (en) * | 2017-12-29 | 2019-03-01 | 长城汽车股份有限公司 | Hydrogen cylinder |
| CN110103015A (en) * | 2019-04-28 | 2019-08-09 | 西安交通大学 | It is a kind of for by multichannel sample introduction valve body zero-bit and grating encoder zero-bit to positive aligning device and its application method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1139070A1 (en) * | 2000-03-27 | 2001-10-04 | Sony Precision Technology Inc. | Inductive position transducer |
| US20050237053A1 (en) * | 2000-08-04 | 2005-10-27 | Kavlico Corporation | Rotary to linear LVDT system |
| CN101893107A (en) * | 2010-08-19 | 2010-11-24 | 中国航空工业第六一八研究所 | Valve pocket positioning structure of multi-redundancy slide valve |
| CN101915589A (en) * | 2010-08-19 | 2010-12-15 | 中国航空工业第六一八研究所 | Zero-debugging method of sensor for main control valve of steering engine actuator |
| CN102588649A (en) * | 2011-12-27 | 2012-07-18 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Servo valve and zero compensation method for same |
| CN203615946U (en) * | 2013-12-10 | 2014-05-28 | 中国航空工业第六一八研究所 | Disassembly-free type sensor zero-setting structure |
| CN203614901U (en) * | 2013-12-04 | 2014-05-28 | 中国航空工业第六一八研究所 | Connecting structure of iron core and valve element of electro-hydraulic servo valve displacement sensor |
| CN104390618A (en) * | 2014-12-05 | 2015-03-04 | 西安航空动力控制科技有限公司 | Linear displacement sensor convenient for adjusting zero position |
| CN105041761A (en) * | 2015-06-08 | 2015-11-11 | 北京精密机电控制设备研究所 | Zero adjustment device for servo actuator |
-
2015
- 2015-12-21 CN CN201510960564.4A patent/CN105546175B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1139070A1 (en) * | 2000-03-27 | 2001-10-04 | Sony Precision Technology Inc. | Inductive position transducer |
| US20050237053A1 (en) * | 2000-08-04 | 2005-10-27 | Kavlico Corporation | Rotary to linear LVDT system |
| CN101893107A (en) * | 2010-08-19 | 2010-11-24 | 中国航空工业第六一八研究所 | Valve pocket positioning structure of multi-redundancy slide valve |
| CN101915589A (en) * | 2010-08-19 | 2010-12-15 | 中国航空工业第六一八研究所 | Zero-debugging method of sensor for main control valve of steering engine actuator |
| CN102588649A (en) * | 2011-12-27 | 2012-07-18 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Servo valve and zero compensation method for same |
| CN203614901U (en) * | 2013-12-04 | 2014-05-28 | 中国航空工业第六一八研究所 | Connecting structure of iron core and valve element of electro-hydraulic servo valve displacement sensor |
| CN203615946U (en) * | 2013-12-10 | 2014-05-28 | 中国航空工业第六一八研究所 | Disassembly-free type sensor zero-setting structure |
| CN104390618A (en) * | 2014-12-05 | 2015-03-04 | 西安航空动力控制科技有限公司 | Linear displacement sensor convenient for adjusting zero position |
| CN105041761A (en) * | 2015-06-08 | 2015-11-11 | 北京精密机电控制设备研究所 | Zero adjustment device for servo actuator |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404721A (en) * | 2017-12-29 | 2019-03-01 | 长城汽车股份有限公司 | Hydrogen cylinder |
| CN109296578A (en) * | 2018-11-29 | 2019-02-01 | 上海航天控制技术研究所 | A kind of triple redundance electrohydraulic servo valve zero-bit combination adjustment device and its method of adjustment |
| CN109296578B (en) * | 2018-11-29 | 2020-05-08 | 上海航天控制技术研究所 | Three-redundancy electro-hydraulic servo valve zero position combination adjusting device and adjusting method thereof |
| CN110103015A (en) * | 2019-04-28 | 2019-08-09 | 西安交通大学 | It is a kind of for by multichannel sample introduction valve body zero-bit and grating encoder zero-bit to positive aligning device and its application method |
| CN110103015B (en) * | 2019-04-28 | 2020-06-19 | 西安交通大学 | Alignment device for aligning zero position of valve body of multi-path sample injection valve with zero position of grating code disc and use method of alignment device |
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| CN105546175B (en) | 2017-12-05 |
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