CN102495228B - Permanent-magnet type airplane wheel speed sensor - Google Patents

Permanent-magnet type airplane wheel speed sensor Download PDF

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Publication number
CN102495228B
CN102495228B CN 201110375502 CN201110375502A CN102495228B CN 102495228 B CN102495228 B CN 102495228B CN 201110375502 CN201110375502 CN 201110375502 CN 201110375502 A CN201110375502 A CN 201110375502A CN 102495228 B CN102495228 B CN 102495228B
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stator
runner
permanent
housing
wheel
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CN 201110375502
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CN102495228A (en
Inventor
何学工
马晓军
王蕾
刘莉
闵丽
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Xian Aviation Brake Technology Co Ltd
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Xian Aviation Brake Technology Co Ltd
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Abstract

The invention discloses a permanent-magnet type airplane wheel speed sensor. A stator and a rotor assembly are mounted in an inner hole of the stator; a rotation shaft of the rotor assembly is mounted in a shaft hole at one end of a shell through a thin bearing and a ball bearing; a magnetic steel seat is mounted in the shell; a coil assembly is located in an inner hole of the magnetic steel seat; and a permanent-magnetic alloy is mounted in an inner hole of the coil assembly. The tooth number of a turning wheel is the same as that of the stator; and a clearance exists between the tooth crest surface of the stator and the tooth crest surface of the turning wheel. In the initial position on which the stator and the turning wheel are matched with each other, the tooth crest of the stator is opposite to the tooth crest of the turning wheel; and when the turning wheel rotates, the magnetic clearance between the stator and the turning wheel forms alternate convex and concave changes along with the change of the relative positions of the stator and the turning wheel. The permanent-magnet type airplane wheel speed sensor disclosed by the invention does not need external power, realizes flexible control and fast response, and is convenient for the airplane to acquire and process the speed signal so that the pilot can conveniently operate the airplane; and the permanent-magnet type airplane wheel speed sensor is directly mounted in the end cover of the airplane wheel, and any modification of the airplane wheel is not required. The permanent-magnet type airplane wheel speed sensor disclosed by the invention has a compact structure and low manufacturing cost, and is convenient to dismantle and simple to maintain.

Description

A kind of permanent-magnet type airplane wheel speed sensor
Technical field
The present invention relates to the Aircraft Anti-skid Break Control field, specifically a kind of permanent-magnet type airplane wheel speed sensor.
Background technology
Along with electronic anti-skid braking system technical research application reaches its maturity, present nearly all aircraft has all been installed this system, wheel spin-up transducer is as a vitals of electronic anti-skid braking system, be used for experiencing the speed of wheel and produce the frequency signal that is directly proportional to the wheel rate signal, pass to controller, determine whether that according to signal frequency needs carry out antiskid brake by controller, this shows, the quality of wheel spin-up transducer, and the height of measuring accuracy, to the normal operation important of brake system.
The speed pickup of tradition brake system is generally inertial sensor, this sensor is comprised of flywheel, ball, lining, volute spring, push rod and rocking arm, pull bar, oil-feed needle-valve and the needle-valve of draining the oil, undertaken anti-skidding by induction negative angle acceleration, said structure mainly adopts mechanical component, has the characteristics such as reliability is high, logic control is simple, but there is the complicated difficult processing of structure, dynamic response is low, measuring accuracy is low, and product easily produces the low deficiency of Single Point of Faliure and braking efficiency without remaining.
Summary of the invention
For overcoming the complicated difficult processing of the structure that exists in prior art, dynamic response is low, measuring accuracy is low, and product easily produces the low deficiency of Single Point of Faliure and braking efficiency without remaining, the present invention proposes a kind of permanent-magnet type airplane wheel speed sensor.
The present invention includes end cap, magnet steel seat, rotor assembly, thin bearing, ball bearing, driving lever, stator, permanent-magnet alloy, coil block, housing and electric connector; Wherein: the runner of stator and rotor assembly is installed in the endoporus of stator; The rotating shaft of rotor assembly is arranged in the axis hole of housing one end by thin bearing and ball bearing; Equal interference fit between the outer round surface of the internal circular surfaces of housing and the outer round surface of thin bearing and ball bearing; End cap is arranged on the other end of housing; Magnet steel seat is arranged in housing, and is positioned at a side of stator; Coil block is arranged in the endoporus of magnet steel seat; Permanent-magnet alloy is arranged in the endoporus of coil block, and interference fit between the two; Electric connector is fixed on the outer face of end cap; Driving lever is fixed on the termination of rotating shaft;
Be evenly equipped with tooth on the excircle of runner, the internal circular surfaces of stator one end has tooth, and the number of teeth on described runner is identical with the number of teeth on described stator; When stator and runner cooperatively interact, the gap of 0.1mm is arranged between the tooth top surface of described stator and the tooth top surface of runner, and when the initial position that stator and runner cooperatively interact, the tooth top of stator is relative with the tooth top of runner; When runner rotated, along with the variation of stator and runner relative position, the magnetic gap between stator and runner formed the variation that convex-concave is staggered.
Rotor assembly is comprised of runner and rotating shaft, and runner is positioned at rotating shaft one end.
Rotor assembly of the present invention is joined together by rotor and rotating shaft, on have the drive unit on gear or shift fork and wheel to be meshed.Stator is-ring gear that rotor is-fluted disc that both tooth top is radially relative, and a little gap (0.15～0.3mm) is arranged between tooth top.Permanent-magnet alloy is pressed in magnet steel seat by coil former, prevents from radially reaching axially-movable by register pin and back-up ring, adopts two remainings on coil, can input dual signal.When rotating under wheel drives, axle rotates together with rotor assembly, along with the relative of rotor tooth and stator tooth with stagger, the between cog magnetic resistance constantly changes, cause the change of magnetic flux, the magnetic flux that changes is responded to the generation sine voltage signal on coil block, the frequency of sinusoidal signal is directly proportional with the wheel velocity of rotation.End cap is fixed by screws on housing.
The present invention has played the effect of small-sized variable reluctance generator at work.need not external power source during work is the sensor power supply, as long as wheel rotates, the sensor that is arranged on wheel just can produce the output signal that is directly proportional to wheel speed, in order to satisfy the remaining requirement, coil adopt two-wire around, realized the redundancy design of product, when speed pickup during by the wheel driven rotary, aim at epitrochanterian rectangular teeth on ring gear, depart from alternately and occur, cause the magnetic resistance cyclical variation in closed magnetic circuit, magnetic flux in magnetic circuit also synchronously changes thereupon, so produce the induced voltage that a near sinusoidal identical with the magnetic resistance change rate frequency changes on coil, obtain being directly proportional to the wheel rotating speed and have the frequency signal of certain voltage.
Compare with traditional inertial sensor, the present invention has following characteristics: simple in structure, effectively alleviated the weight of sensor; There is no in work that movable breaker point, life-span are long, highly sensitive, good output and reliable and stable.It is the sensor power supply that the present invention does not need external power source, and control mode is more flexible, and response is fast, is convenient to aircraft rate signal is gathered, processes, and the pilot can conveniently be operated; Be directly installed in the wheel end cap, need not wheel is done any change.Compact conformation of the present invention, convenient disassembly is safeguarded simply low cost of manufacture.
Description of drawings
Accompanying drawing 1 is the structural representation of permanent-magnet type airplane wheel speed sensor.
Accompanying drawing 2 is structural representations of rotor assembly.
Accompanying drawing 3 is structural representations of stator.
Accompanying drawing 4 is structural representations of coil block.
Accompanying drawing 5 is structural representations of magnet steel seat.
Accompanying drawing 6 is structural representations of housing.
Accompanying drawing 7 is structural representations of driving lever.
Accompanying drawing 8 is structural representations of end cap.Wherein:
1. end cap 2. dust ring 3. pin 4. magnet steel seat 5. back-up ring 6. thin bearing 8. ball bearing 9. spring washer 10. driving lever 11. nut 12. key 13. pad 14. stator 15. permanent-magnet alloy 16. coil block 17. housing 18. O-ring seal 19. electric connector 20. screw 21. runner 22. rotating shaft 23. sleeve pipe 24. fluoroplastic wire 25. enameled wire 26. skeletons of rotor assembly 7.
Embodiment
The present embodiment is a kind of wheel spin-up transducer for certain system.
The present embodiment comprises end cap 1, dust ring 2, magnet steel seat 4, back-up ring 5, rotor assembly 6, thin bearing 7, ball bearing 8, spring washer 9, driving lever 10, nut 11, key 12, pad 13, stator 14, permanent-magnet alloy 15, coil block 16, housing 17, O-ring seal 18 and electric connector 19.
Housing 17 is carriers of the present embodiment.At the bottom of the hole in housing that stator 14 is installed 17 large diameter holes.The runner 21 of rotor assembly 6 is arranged in the endoporus of stator 14; The rotating shaft 22 of rotor assembly 6 is arranged in the axis hole of housing 17 1 ends by thin bearing 7 and ball bearing 8; End cap 1 is arranged on the other end of housing 17.Magnet steel seat 4 is arranged in housing 17, and is positioned at a side of stator 14.Coil block 16 is arranged in the endoporus of magnet steel seat 4.Permanent-magnet alloy 15 is arranged in the endoporus of coil block 16.Electric connector 19 is fixed on the outer face of end cap by screw 20.Driving lever 10 is fixed on the termination of rotating shaft 22 by key 12.
Rotor assembly 6 is comprised of runner 21 and rotating shaft 22, and runner 21 is positioned at rotating shaft 22 1 ends, and links together by Laser Welding (LBW) and rotating shaft 22.Be evenly equipped with 50 teeth on the excircle of runner 21, space width is 1.5mm, and the facewidth is 2mm, and tooth depth is 0.5mm.Tooth on runner 21 excircles and the tooth on the stator internal circular surfaces match, and produce magnetic resistance change rate by when dislocation at the bottom of the tooth top tooth.The outer round surface of rotating shaft 22 has keyway.Thin bearing 7, ball bearing 8 and housing 17 are passed in the rotating shaft 22 of rotor assembly 6 successively, and by 12 pairs of thin bearings 7 of key, ball bearing 8 and housing 17 axial location.Equal interference fit between the outer round surface of the outer round surface of the internal circular surfaces of housing 17 and thin bearing 7 and ball bearing 8.Key 12 adopts standard component.In the present embodiment, rotating shaft 22 is that a length is that the 30mm diameter is the 7mm right cylinder; The external diameter of runner 21 is identical with the internal diameter of stator 14; The external diameter of rotating shaft 22 is identical with the internal diameter of thin bearing 7, ball bearing 8.
Stator 14 is annular element.The mounting groove of magnet steel seat 4 is arranged in stator 14 1 end surfaces centers, at the center of this mounting groove, removal hole is arranged.Internal circular surfaces at the described stator other end has 50 teeth, and the spacing of described tooth is 1.5mm, and the facewidth is 2mm, and tooth depth is 0.5mm.
When stator 14 and runner 21 cooperatively interact, the gap of 0.1mm is arranged between the tooth top surface of the tooth top surface of described stator 14 and runner 21, and when the initial position that stator 14 and runner 21 cooperatively interact, the tooth top of stator 14 is relative with the tooth top of runner 21.When runner 21 rotated, along with the variation of stator 14 with runner 21 relative positions, the magnetic gap between stator 14 and runner 21 formed the variation that convex-concave is staggered.
Coil block 16 is comprised of sleeve pipe 23, fluoroplastic wire 24, enameled wire 25 and skeleton 26, at first enameled wire 25 tops is reserved approximately after 150mm by winder on skeleton 26.Wind the line complete, fluoroplastic wire 24 is divested 3～4mm, and undertaken stranded by former twisted state.Enameled wire top and end are removed the insulation enamelled coating with fine sandpaper, be wrapped in respectively fluoroplastic wire 24 ends by the hand of spiral, with scolder HLSnPbSb-0.8 welding.Postwelding cleans up with absolute ethyl alcohol, is coated with W30-4 paint, and sleeve pipe also is enclosed within on the fluoroplastic wire 24 with sleeve pipe 23.
Magnet steel seat 4 is circular shell.The external diameter of magnet steel seat 4 is identical with the internal diameter of housing 7; The internal diameter of magnet steel seat 4 is identical with the external diameter of coil block 16.Permanent-magnet alloy 15 is packed in magnet steel seat 4 endoporus, and interference fit between the two; Magnet steel seat 4 is arranged in coil block 16 endoporus, and by pin 3 location.
Housing 17 is the hollow solid of revolution.The endoporus of described housing 17 is stepped.The maximum diameter of hole of the endoporus of this housing 17 is the most identical for external diameter with coil block 16.The minimum-value aperture of the endoporus of this housing 17 is identical with the external diameter of thin bearing 7, ball bearing 8.At housing 17 minimum-value apertures middle parts, the boss that radially protrudes is arranged, formed the shaft shoulder of thin bearing 7, ball bearing 8.Thin bearing 7 and ball bearing 8 are arranged on respectively the both sides of the described shaft shoulder.The flange that the end face that housing 17 is adjacent with ball bearing 8 is connected with wheel shaft for this housing 17; The other end of housing has the internal thread that connects end cap 1.
End cap 1 is the hollow solid of revolution, and outer round surface is useful on the screw thread that coordinates with housing 17; Centre at end cap 1 has through hole, is used for the lead-in wire on coil 16 is passed.The threaded hole that is fixedly connected with electric connector 19 is arranged on the end face of end cap 1.
Driving lever 10 is " U " shape plate.The via hole that rotating shaft 22 is arranged at an end of driving lever 10.The width of " U " shape groove of described driving lever 10 and the diameter of the pulling axis on wheel adapt.
First a pair of thin bearing 7 ball bearing 8 are pressed in housing 17 during assembling, then rotor assembly 6 is passed from thin bearing 7 ball bearing 8 and housing 17 mesopores, runner 21 is positioned at enclosure interior, between the inside surface of runner 21 end faces and housing 17, pad 13 is arranged, do not damage housing 17 to guarantee runner 21 when rotating.Rotating shaft 22 is in outside, is connected connection with driving lever by key 12, is screwed in rotating shaft 22 also locked for preventing that rotor assembly 6 from producing to move axially with spring washer 9 and nut 11.
After rotor assembly 6 installs, with depression bar, stator 14 vertically slowly is pressed into housing 17 to stop.Then the coil block 16 of again permanent-magnet alloy 15 being packed into is encased in coil block 16 in magnet steel seat 4, and magnet steel seat 4 one side pressures are lived stator 14, rotates for avoiding magnet steel seat 4, and pin 3 one ends are contained in magnet steel seat 4 grooves, and an end is contained in housing 17 grooves and carries out stop.For avoiding magnet steel seat 4 to move axially, be screwed in end cap 1 on housing 17 and compress magnet steel seat 4, first dust ring 2 be enclosed within the seal groove of end cap 1 before end cap 1 is screwed in housing 17 and make in order, draw from end cap 1 hole institute is leaded, drawing wire adopts the crimping mode to be connected with electric connector 19, electric connector 19 is fixed on end cap 1 by screw 20, and wherein dust ring 2, pin 3 and screw 20 are standard component, can buy on market.
the electric motor type wheel spin-up transducer course of work is, when being connected the gear train rotation that connects with driving lever, driving driving lever 10 transmissions rotates together, the rotor assembly 6 that connects of being connected with driving lever simultaneously also rotates thereupon, ring gear on rotor assembly 6 is aimed at the rectangular teeth on stator 14, depart from alternately and occur, cause the magnetic resistance cyclical variation in closed magnetic circuit, magnetic flux in magnetic circuit also synchronously changes thereupon, so produce the induced voltage that a near sinusoidal identical with the magnetic resistance change rate frequency changes on coil, obtain being directly proportional to the wheel rotating speed and have the frequency signal of certain voltage.

Claims (2)

1. a permanent-magnet type airplane wheel speed sensor, is characterized in that, comprises end cap, magnet steel seat, rotor assembly, thin bearing, ball bearing, driving lever, stator, permanent-magnet alloy, coil block, housing and electric connector; Wherein: the runner of rotor assembly is arranged in the endoporus of stator; The rotating shaft of rotor assembly is arranged in the axis hole of housing one end by thin bearing and ball bearing; Equal interference fit between the outer round surface of the internal circular surfaces of housing and the outer round surface of thin bearing and ball bearing; End cap is arranged on the other end of housing; Magnet steel seat is arranged in housing, and is positioned at a side of stator; Coil block is arranged in the endoporus of magnet steel seat; Permanent-magnet alloy is arranged in the endoporus of coil block, and interference fit between the two; Electric connector is fixed on the outer face of end cap; Driving lever is fixed on the termination of rotating shaft;
Be evenly equipped with tooth on the excircle of runner, the internal circular surfaces of stator one end has tooth, and the number of teeth on described runner is identical with the number of teeth on described stator; When stator and runner cooperatively interact, the gap of 0.1mm is arranged between the tooth top surface of described stator and the tooth top surface of runner, and when the initial position that stator and runner cooperatively interact, the tooth top of stator is relative with the tooth top of runner; When runner rotated, along with the variation of stator and runner relative position, the magnetic gap between stator and runner formed the variation that convex-concave is staggered.
2. a kind of permanent-magnet type airplane wheel speed sensor as claimed in claim 1, is characterized in that, rotor assembly is comprised of runner and rotating shaft, and runner is positioned at rotating shaft one end.
CN 201110375502 2011-11-22 2011-11-22 Permanent-magnet type airplane wheel speed sensor Active CN102495228B (en)

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Application Number Priority Date Filing Date Title
CN 201110375502 CN102495228B (en) 2011-11-22 2011-11-22 Permanent-magnet type airplane wheel speed sensor

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Application Number Priority Date Filing Date Title
CN 201110375502 CN102495228B (en) 2011-11-22 2011-11-22 Permanent-magnet type airplane wheel speed sensor

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CN102495228A CN102495228A (en) 2012-06-13
CN102495228B true CN102495228B (en) 2013-06-26

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104897922B (en) * 2015-06-29 2017-12-05 贵州新安航空机械有限责任公司 A kind of contactless Hall magnetic induction type wheel spin-up transducer
CN105785063B (en) * 2016-04-05 2019-02-22 中国船舶重工集团公司第七一二研究所 A kind of mining rotation-speed measuring device and its measurement method
CN110065462B (en) * 2018-01-24 2022-05-03 现代自动车株式会社 Ignition control system for safety air bag of vehicle and control method thereof
CN108405034B (en) * 2018-04-17 2023-09-01 武汉轻工大学 Measurement sensor and self-feedback automatic compensation rice huller
CN108761116B (en) * 2018-07-27 2024-04-19 西安航空制动科技有限公司 Speed sensor for hollow wheel
CN109406821B (en) * 2018-09-18 2020-12-18 贵州新安航空机械有限责任公司 Variable-reluctance wheel speed sensor
CN111665369B (en) * 2020-05-15 2022-03-15 杭州杰牌传动科技有限公司 Self-charging integrated rotating machinery rotating speed sensor and rotating speed calculation method thereof
CN111735983A (en) * 2020-06-28 2020-10-02 西北工业大学 System and method for acquiring wheel speed of airplane anti-skid brake based on magnetic resistance induction

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08201410A (en) * 1994-11-25 1996-08-09 Nippon Seiko Kk Rolling bearing unit with rotating speed detector
CN2222921Y (en) * 1994-11-28 1996-03-20 海安县电器仪表厂 Magnetoelectric speed measuring transducer
DE10130130B4 (en) * 2001-06-22 2007-09-20 Minebea Co., Ltd. Device for generating a speed-dependent signal for an electric motor, in particular for an electronically commutated DC motor
CN201254984Y (en) * 2008-06-03 2009-06-10 中国石油集团钻井工程技术研究院 Downhole rotating equipment and tacheometry apparatus thereof

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