CN107389181A - A kind of torsional oscillation detection method and its sensor of application - Google Patents
A kind of torsional oscillation detection method and its sensor of application Download PDFInfo
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- CN107389181A CN107389181A CN201710740261.0A CN201710740261A CN107389181A CN 107389181 A CN107389181 A CN 107389181A CN 201710740261 A CN201710740261 A CN 201710740261A CN 107389181 A CN107389181 A CN 107389181A
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- expanding
- rotating shaft
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/02—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by magnetic means, e.g. reluctance
Abstract
The invention discloses a kind of torsional oscillation detection method and its sensor of application.Magneto rotary acceleration sensors must with rotating shaft to be measured is coaxially concentric installs.The sensor that a kind of torsional oscillation detection method of the present invention uses, including bridge arm and detection unit.Detection unit includes output winding, roller, permanent magnetic steel and stator core.Step 1: if shaft diameter to be measured is placed into rotating shaft to be measured simultaneously adhesive in the detection range of sensor, by sensor.If shaft diameter to be measured is outside the detection range of sensor, according to the width of rotating shaft exposed portion to be measured, the expanding disk of selection manufacture cup or the expanding disk of cylindricality.Step 2: according to the magnitude of voltage exported on output winding, torsional oscillation and torsional oscillation situation are judged whether.The present invention can detect rotary acceleration of the diameter less than the rotating shaft of sensor Monitoring lower-cut by way of fixing expanding disk in the too small rotating shaft of diameter.
Description
Technical field
The invention belongs to torsional oscillation detection technique field, and in particular to a kind of torsional oscillation detection method and its sensor of application.
Background technology
Torsional oscillation is one of most common physical quantity present in rotatory mechanical system, is turned when existing between prime mover and load
Then rotatory mechanical system will produce torsional oscillation to square difference, and this torsional oscillation makes the change of rotary system rotating shaft generation rotary acceleration, and
To pass to load by rotating shaft make rotary drive system produce vibration and noise, therefore, necessary to rotatory mechanical system
Torsional oscillation information carries out effectively measurement analysis, proposes corresponding braking measure.Currently known torsional vibration measurement sensor includes circle
Grating sensor and laser grating sensor, the signal that both sensors are measured are discrete, and precision is not high, are installed also not
It is convenient.The rotary acceleration signal that magneto rotary acceleration sensors measure is continuous variable quantity, but magneto rotation adds
Velocity sensor must with rotating shaft is coaxially concentric is directly connected to, or for different shaft diameters manufacture corresponding thereto portable
Formula sensor.Therefore, for having shaped and be used and can not directly coaxial installation magneto rotary acceleration with one heart
The occasion of sensor, particularly only expose the occasion of axle middle part, can not just use the rotation of the convenient countershaft of the sensor
Rotational acceleration measures, also just can not observing system produce torsional oscillation situation.
The content of the invention
It is an object of the invention to only expose in local rotatory mechanical system for operation has been put into and is tested rotating shaft
The actual demand of shaft torsional information measurement, there is provided a kind of torsional oscillation detection method and its universal sensor of application.
The sensor that a kind of torsional oscillation detection method of the present invention uses, including bridge arm and detection unit.Described detection unit
Including output winding, roller, permanent magnetic steel and stator core.The both ends of the stator core medial surface are supported with two rollings
Wheel.Two roller axis that stator core medial surface is supported on one end overlap.The center position of stator core offers magnet steel
Groove.Magnet steel groove is embedded with permanent magnetic steel.Output winding is wound with stator core.
Described detection unit shares n, n >=2.N detection unit is arranged in order.The adjacent detection unit of any two
Inner-stator iron core is connected by bridge arm.The connected mode of bridge arm and stator core is be hinged.In two neighboring detection unit forever
The polarity of magnetic magnet steel opposite end is identical.In n detection unit output winding around to consistent, and be arranged in series.
The torsional oscillation detection method is specific as follows：
Step 1: measure the diameter D of rotating shaft exposed portion to be measured2And width s.If the material of rotating shaft to be measured is metal, D2
≥D1, and s>A, wherein, a is width of the detection unit along stator core central axial direction, D1It can be surveyed for sensor minimum straight
The adjacent stator core in footpath, i.e. any two is contacted with each other under state, the corresponding rotating shaft diameter of axle.Then by n stator core
Medial surface toward and proximate to rotating shaft to be measured, the roller in n detection unit contacts with rotating shaft excircle to be measured.
If D2<D1Or the material of rotating shaft to be measured is nonmetallic, then selection manufactures the expanding disk of cylindricality or the expanding disk of cup.If s
>=(b+c) × a, wherein, b >=1.1, c >=0.5, a are width of the detection unit along stator core central axial direction, then manufacture
The expanding disk of cylindricality.The expanding disk of cylindricality is in ladder shaft-like.It is D that aperture is offered in the expanding side surface of cylindricality2Central through hole.Cylindricality
A diameter of D of shaft part is relatively large in diameter on expanding disk3, length is b × a, D3≥D1.The less shaft part of diameter on the expanding disk of cylindricality
Length is c × a.The expanding disk of cylindricality is spliced by two the first splicing blocks.Two the first splicing blocks are detachably fixed.By cylindricality
Two the first splicing blocks in expanding disk take rotating shaft to be measured and fixation in rear enclosure apart.By in n detection unit inner-stator iron core
Side toward and proximate to the shaft part being relatively large in diameter on the expanding disk of cylindricality, make roller in n detection unit with the expanding disk of cylindricality
On be relatively large in diameter shaft part excircle contact.
If (c+0.2) × a≤s≤(b+c) × a, the expanding disk of cup is manufactured.The expanding disk of cup is in ladder shaft-like.Cup
The shaft part external diameter being relatively large in diameter on expanding disk is D4, length is b × a, D4＞ D5, wherein, D5For rotating shaft exposed portion to be measured both sides
Barrier in that less barrier of tactical diameter tactical diameter.The length of the smaller shaft part of diameter is on the expanding disk of cup
c×a.Cup offers ladder hole on expanding side surface center.The aperture of ladder hole internal orifice dimension smaller hole section is equal to
D2.The larger hole section of ladder hole internal orifice dimension is located in the expanding larger shaft part in dish axle footpath of cup, and aperture is D6, depth e, e ＞
(b+c) × a-s, D5＜ D6＜ D4.The expanding disk of cup is spliced by two the second splicing blocks.Two the second splicing blocks are detachable
It is fixed.Take two the second splicing blocks in the expanding disk of cup apart in rear enclosure rotating shaft to be measured to fix, and cause in the expanding disk of cup
The larger hole section in ladder hole aperture is enclosed on that less obstacle of tactical diameter in the barrier of rotating shaft exposed portion to be measured both sides
Beyond the region of objective existence.By the medial surface of n detection unit inner-stator iron core toward and proximate to the shaft part being relatively large in diameter on the expanding disk of cup, make n
Roller in individual detection unit contacts with the shaft part excircle being relatively large in diameter on the expanding disk of cup.
Step 2: rotor, rotor surface are used as using rotating shaft to be measured, the expanding disk of cylindricality or the expanding disk of cup contacted with roller
Metal level as rotor conductor.Permanent magnetic steel N poles-stator core-air gap-rotor-rotor between rotor and stator core
Air gap-stator core-permanent magnetic steel S poles-permanent magnetic steel forms closed magnetic circuit between stator core, and its caused magnetic flux is
Φ1.Axis of rotation to be measured, air-gap field caused by rotor conductor cutting permanent magnetic steel, produces induced electromotive force and induced-current.
Rotor conductor produces the magnetic field that magnetic flux is Φ 2 in the presence of induced-current, and magnetic flux Φ 2 is by rotor-rotor and stator iron
Air gap-stator core-bridge arm-stator core between core-air gap-rotor forms closed magnetic circuit, magnetic between rotor and stator core
Logical Φ 2 and output winding intersecting chain.
If rotary speed of rotator is stable, caused induced electromotive force is constant on rotor conductor, and caused electric current is constant, production
Raw magnetic field is constant, and each export in winding does not produce induced electromotive force.If rotor speed is unstable, rotor conductor cutting magnetic flux
For Φ1Magnetic field when, there is change component in cutting speed, so that caused induced electromotive force has change point on rotor conductor
There is change component in amount, caused induced-current, thus magnetic flux Φ 2 is there is also change component, magnetic flux Φ 2 change component with it is each
Individual output winding intersecting chain, induced electromotive force is produced in each output winding.After exporting the induced electromotive force superposition in winding
Exported from two voltage output ends.The rotary acceleration of rotating shaft to be measured is bigger, then the magnitude of voltage of two voltage output end outputs is got over
Greatly, i.e., torsional oscillation is more serious.
Further, the cross section of the stator core is in fan annular.The axis of the four rolling and stator core
Centerline axis parallel and apart from equal.
Further, square groove is offered on the both ends end face of the stator core.Output winding is wrapped in two square grooves
On.
Further, the stator core is formed by stacking by I-shaped silicon steel punched chip.Stator core is used for around output
Insulation processing is passed through in the square groove position outer surface of winding.
Further, described output winding is formed by enamel-covered wire coiling.
Further, two the first splicing blocks are fixed by the bolt being arranged on the expanding smaller shaft part of disk diameter of cylindricality.
Two the second splicing blocks are fixed by the bolt being arranged on the expanding smaller shaft part of disk diameter of cup.
Further, first described splicing block one end is provided with triangular hill, and the other end is provided with triangular shaped recess.First
The position correspondence of triangular shaped recess and triangular hill on splicing block.
Further, second described splicing block one end is provided with triangular hill, and the other end is provided with triangular shaped recess.Second
The position correspondence of triangular shaped recess and triangular hill on splicing block.
The invention has the advantages that：
1st, the present invention is for having shaped and being used and can not install docking style or axle sleeve type magneto is spun up
The rotating shaft of sensor is spent, rotating shaft is detected partially over universal type permanent magnet formula rotary acceleration sensors using what rotating shaft was exposed
Torsional oscillation situation.
2nd, the present invention can detect the torsional oscillation situation of the rotating shaft of the different diameters of axle.
3rd, the present invention can detect diameter and be less than sensor by way of fixing expanding disk in the too small rotating shaft of diameter
The rotary acceleration of the rotating shaft of Monitoring lower-cut.
4th, the present invention, can by way of cup type expanding disk is fixed in the rotating shaft too small and narrow measurement space in diameter
Detection diameter is less than sensor Monitoring lower-cut, and exposed portion is less than the rotary acceleration of the rotating shaft of sensor width.
Brief description of the drawings
Fig. 1 is the schematic diagram that the sensor that the present invention uses is arranged in rotating shaft；
Fig. 2 is the schematic top plan view that the present invention uses sensor；
Fig. 3 is the schematic diagram that the sensor that the present invention uses coordinates that the expanding disk of cylindricality is arranged in rotating shaft；
Fig. 4 is the schematic diagram that the sensor that the present invention uses coordinates that the expanding disk of cup is arranged in rotating shaft；
Fig. 5 is the end view of the expanding disk of cylindricality in the present invention；
Fig. 6 is the end view of the expanding disk of cup in the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As illustrated in fig. 1 and 2, the universal sensor that a kind of torsional oscillation detection method uses, including bridge arm 5 and detection unit.
Detection unit includes output winding 1, roller 2, permanent magnetic steel 3 and stator core 4.The cross section of stator core 4 is in fan ring-shaped.
The both ends of the intrados of stator core 4 are supported with two rollers.It is supported on two roller shafts of the intrados of stator core 4 with one end
Line overlaps.The centerline axis parallel of the axis of four rolling and the intrados of stator core 4 and apart from equal.Stator core 4 is just
Middle position offers magnet steel groove.Magnet steel groove is embedded with permanent magnetic steel 3.The magnetic pole of permanent magnetic steel is towards along the intrados of stator core 4
Central axis it is circumferentially disposed.Square groove is offered in the both ends of the surface of stator core 4.Output winding is wrapped on two square grooves.
Stator core is formed by stacking by the silicon steel punched chip of I-shaped shape.Insulation processing is passed through in the outer surface of stator core.
Detection unit shares three.Three detection units are arranged in order.The adjacent detection unit inner stator iron of any two
Core 4 is connected by bridge arm 5.The connected mode of bridge arm 5 and stator core 4 is be hinged.Permanent-magnet magnetic in two neighboring detection unit
The polarity of the opposite end of steel 3 is identical.In three detection units output winding around to consistent, and be arranged in series composition one and connect back
Road, so that the induced potential value of series loop output end is the induced potential superposition output in each output winding, i.e., each detection
The winding of unit is connected by output winding induced potential "+" "-" end in neighbouring detecting elements.Two outputs positioned at outermost end around
That terminals not being connected in group with adjacent output winding are respectively two voltage output ends.
The torsional oscillation detection method is specific as follows：
Step 1: measure the diameter D of the exposed portion of rotating shaft 9 to be measured2And width s.If the material of rotating shaft to be measured is metal,
D2≥D1, and s>A, wherein, a is width of the detection unit along stator core central axial direction, D1It can be detected most for sensor
The diameter of minor diameter rotating shaft, i.e., all rollers with a diameter of D1Shaft contacts in the case of, the adjacent stator of any two
Iron core contacts with each other.Then by the intrados of three detection unit inner-stator iron cores toward and proximate to rotating shaft 9 to be measured.Permanent magnetic steel
Suction is produced with rotating shaft 9 to be measured, three detection units are attracted in rotating shaft 9 to be measured, and the roller in three detection units is equal
Contacted with the excircle of rotating shaft 9 to be measured.The Inner arc of three stator cores has air gap with rotating shaft 9 to be measured.In 9 turns of rotating shaft to be measured
In the case of dynamic, roller rolls in rotating shaft 9 to be measured, three detection units spatially equal remains stationary, thus rotating shaft to be measured 9 with
Three detection units produce relative motion.Because detection unit and bridge arm 5 can relatively rotate, therefore three detection units are not for
Rotating shaft to be measured 9 with the diameter of axle can realize good adsorption.
If D2<D1Or the material of rotating shaft to be measured is nonmetallic, then selection manufactures the expanding disk of cylindricality or the expanding disk of cup.If s
It is width of the detection unit along stator core central axial direction that >=(b+c) × a, b value, which takes 1.3, c value to take 0.7, a, then makes
Make the expanding disk 6 of cylindricality made of metal material.As shown in Figures 3 and 5, the expanding disk 6 of cylindricality is in ladder shaft-like.The expanding end of disk 6 of cylindricality
It is D that aperture is offered on face2Central through hole.A diameter of D of shaft part is relatively large in diameter on the expanding disk of cylindricality3, length is b × a, D3
≥D1.The length of the less shaft part of diameter is c × a on the expanding disk of cylindricality.The expanding disk 6 of cylindricality is spelled by two identical first
Block 11 is connect to be spliced.The one end of first splicing block 11 is provided with triangular hill 12, and the other end is provided with triangular shaped recess.First splicing
Triangular shaped recess and the position correspondence of triangular hill 12 on block 11.Triangular shaped recess and triangle on first splicing block 11
Projection 12 is used for the fast positioning of two the first splicing blocks.Two the first splicing blocks 11 are by being arranged on the expanding diameter of disk 6 of cylindricality
Bolt 10 on smaller shaft part is fixed.After obtaining the expanding disk 6 of cylindricality, the first splicing block 11 in the expanding disk 6 of two cylindricalitys is torn open
Open rotating shaft 9 to be measured in rear enclosure and fix.By the intrados of three detection unit inner-stator iron cores toward and proximate to the expanding disk 6 of cylindricality
On the shaft part that is relatively large in diameter.Permanent magnetic steel produces suction, three detection unit quilts with the shaft part being relatively large in diameter on the expanding disk 6 of cylindricality
Absorption on the shaft part that the expanding disk 6 of cylindricality is relatively large in diameter, on the roller disk 6 expanding with cylindricality in three detection units diameter compared with
Big shaft part excircle contact.
If (c+0.2) × a≤s≤(b+c) × a, the expanding disk 8 of cup made of metal material is manufactured.Such as the institutes of Fig. 4 and 6
Show, the expanding disk 8 of cup is in ladder shaft-like.The shaft part external diameter being relatively large in diameter on the expanding disk of cup is D4, length is b × a, D4＞ D5,
Wherein, D5For the tactical diameter of that less barrier of tactical diameter in the barrier of rotating shaft exposed portion to be measured both sides.Cup
The length of the smaller shaft part of diameter is c × a on the expanding disk of shape.Cup offers ladder hole on expanding side surface center.Rank
The aperture of terraced through hole internal orifice dimension smaller hole section is equal to D2.The larger hole section of ladder hole internal orifice dimension be located at the expanding dish axle footpath of cup compared with
In big shaft part, and aperture is D6, depth e, e ＞ (b+c) × a-s, D6＞ D5.And then ensure each detection unit in axis of rotation
In do not collided with barrier.The expanding disk 8 of cup is spliced by two identical second splicing blocks 13.Second splicing
The one end of block 13 is provided with triangular hill 12, and the other end is provided with triangular shaped recess.Triangular shaped recess and three on second splicing block 13
Angular raised 12 position correspondence.Triangular shaped recess on second splicing block 13 is used for two second splicings with triangular hill 12
The fast positioning of block.Two the second splicing blocks 13 are fixed by the bolt 10 being arranged on the expanding smaller shaft part of the diameter of disk 8 of cup.
After obtaining the expanding disk 8 of cup, take the second splicing block 13 in the expanding disk 8 of two cups apart in rear enclosure rotating shaft 9 to be measured and fix, and
So that the larger hole section in ladder hole aperture is entangled and turned round in the barrier 7 of the exposed portion both sides of rotating shaft 9 to be measured in the expanding disk 8 of cup
That less barrier 7 of diameter.By the intrados of three detection unit inner-stator iron cores toward and proximate on the expanding disk 8 of cup
The shaft part being relatively large in diameter.Permanent magnetic steel produces suction with the shaft part being relatively large in diameter on the expanding disk 8 of cup, and three detection units are inhaled
It is attached on the shaft part that the expanding disk 8 of cup is relatively large in diameter, is relatively large in diameter on the disk 8 expanding with cup of the roller in three detection units
Shaft part excircle contact.The shaft part being relatively large in diameter on the Inner arc of three stator cores disk 8 expanding with cup has air gap,
In the case where rotating shaft 9 to be measured rotates, roller is rolled on the shaft part that the expanding disk 8 of cup is relatively large in diameter, and three detection units are protected
Hold static, therefore the shaft part that is relatively large in diameter on the expanding disk 8 of cup and three detection units produce relative motions.Due to detection unit with
Bridge arm 5 can relatively rotate, therefore three detection units are for the equal energy of shaft part that is relatively large in diameter on the expanding disk 8 of cup of various outer diameter
Enough realize good adsorption.
Step 2: rotor, rotor surface are used as using rotating shaft to be measured, the expanding disk of cylindricality or the expanding disk of cup contacted with roller
Metal level as rotor conductor.Permanent magnetic steel N poles-stator core-air gap-rotor-rotor between rotor and stator core
Air gap-stator core-permanent magnetic steel S poles-permanent magnetic steel forms closed magnetic circuit between stator core, and its caused magnetic flux is
Φ1.Axis of rotation to be measured so that rotor conductor rotate cutting permanent magnetic steel caused by air-gap field, produce induced electromotive force and
Induced-current.It is Φ that rotor conductor produces magnetic flux in the presence of induced-current2Magnetic field, magnetic flux Φ2By rotor-rotor
The air gap of air gap-stator core-bridge arm-stator core-between rotor and stator core-rotor is formed and closed between stator core
Close magnetic circuit, magnetic flux Φ2With exporting winding intersecting chain.
If rotary speed of rotator is stable, caused induced electromotive force is constant on rotor conductor, and caused electric current is constant, production
Raw magnetic field is constant, exports in winding and does not produce induced electromotive force.If rotor speed is unstable, rotor conductor cutting magnetic flux is
Φ1Magnetic field when, there is change component in cutting speed, so that caused induced electromotive force has change point on rotor conductor
Change component, thus magnetic flux Φ be present in amount, caused induced-current2There is also change component, magnetic flux Φ2Change component with it is each
Individual output winding intersecting chain, induced electromotive force is produced in each output winding.Due to each output windings in series, therefore export winding
In induced electromotive force superposition after exported from two voltage output ends.The rotary acceleration of rotating shaft to be measured is bigger, then two voltage
The magnitude of voltage of output end output is bigger, i.e., torsional oscillation is more serious.It can be seen that the situation of change reflection of the electromotive force of voltage output end output
The situation of change of rotating shaft rotary acceleration to be measured.Because the difference in torque between rotary acceleration and prime mover, load is directly proportional.
Torsional oscillation is produced by the difference in torque between prime mover, load.Therefore, rotating shaft rotary acceleration to be measured can directly reflect torsional oscillation feelings
Condition.
Claims (9)
- A kind of 1. torsional oscillation detection method, it is characterised in that：The sensor of use, including bridge arm and detection unit；Described detection Unit includes output winding, roller, permanent magnetic steel and stator core；The both ends of the stator core medial surface are supported with two Roller；Two roller axis that stator core medial surface is supported on one end overlap；The center position of stator core offers magnetic Steel tank；Magnet steel groove is embedded with permanent magnetic steel；Output winding is wound with stator core；Described detection unit shares n, n >=2；N detection unit is arranged in order；The adjacent detection unit of any two is default Sub- iron core is connected by bridge arm；The connected mode of bridge arm and stator core is be hinged；Permanent-magnet magnetic in two neighboring detection unit The polarity of steel opposite end is identical；In n detection unit output winding around to consistent, and be arranged in series；The torsional oscillation detection method is specific as follows：Step 1: measure the diameter D of rotating shaft exposed portion to be measured2And width s；If the material of rotating shaft to be measured is metal, D2≥ D1, and s>A, wherein, a is width of the detection unit along stator core central axial direction, D1Minimum diameter can be surveyed for sensor, That is the adjacent stator core of any two is contacted with each other under state, the corresponding rotating shaft diameter of axle；Then by n stator core Toward and proximate to rotating shaft to be measured, the roller in n detection unit contacts with rotating shaft excircle to be measured for side；If D2<D1Or the material of rotating shaft to be measured is nonmetallic, then selection manufactures the expanding disk of cylindricality or the expanding disk of cup；If s >=(b + c) × a, wherein, b >=1.1, c >=0.5, a are width of the detection unit along stator core central axial direction, then manufacture cylindricality Expanding disk；The expanding disk of cylindricality is in ladder shaft-like；It is D that aperture is offered in the expanding side surface of cylindricality2Central through hole；Cylindricality is expanding A diameter of D of shaft part is relatively large in diameter on disk3, length is b × a, D3≥D1；The length of the less shaft part of diameter on the expanding disk of cylindricality For c × a；The expanding disk of cylindricality is spliced by two the first splicing blocks；Two the first splicing blocks are detachably fixed；Cylindricality is expanding Two the first splicing blocks in disk take rotating shaft to be measured and fixation in rear enclosure apart；By the medial surface of n detection unit inner-stator iron core Toward and proximate to the shaft part being relatively large in diameter on the expanding disk of cylindricality, make roller in n detection unit with it is straight on the expanding disk of cylindricality The larger shaft part excircle contact in footpath；If (c+0.2) × a≤s≤(b+c) × a, the expanding disk of cup is manufactured；The expanding disk of cup is in ladder shaft-like；Cup is expanding The shaft part external diameter being relatively large in diameter on disk is D4, length is b × a, D4＞ D5, wherein, D5For the barrier of rotating shaft exposed portion to be measured both sides Hinder the tactical diameter of that less barrier of tactical diameter in thing；On the expanding disk of cup the length of the smaller shaft part of diameter be c × a；Cup offers ladder hole on expanding side surface center；The aperture of ladder hole internal orifice dimension smaller hole section is equal to D2； The larger hole section of ladder hole internal orifice dimension is located in the expanding larger shaft part in dish axle footpath of cup, and aperture is D6, depth e, e ＞ (b + c) × a-s, D5＜ D6＜ D4；The expanding disk of cup is spliced by two the second splicing blocks；Two the second splicing blocks are detachably solid It is fixed；Take two the second splicing blocks in the expanding disk of cup apart in rear enclosure rotating shaft to be measured to fix, and cause rank in the expanding disk of cup The terraced larger hole section of through-hole aperture is enclosed on that less barrier of tactical diameter in the barrier of rotating shaft exposed portion to be measured both sides Outside；By the medial surface of n detection unit inner-stator iron core toward and proximate to the shaft part being relatively large in diameter on the expanding disk of cup, make n Roller in detection unit contacts with the shaft part excircle being relatively large in diameter on the expanding disk of cup；Step 2: rotor, the gold of rotor surface are used as using rotating shaft to be measured, the expanding disk of cylindricality or the expanding disk of cup contacted with roller Belong to layer as rotor conductor；Permanent magnetic steel N poles-stator core-between rotor and stator core air gap-rotor-rotor with it is fixed Air gap-stator core-permanent magnetic steel S poles-permanent magnetic steel forms closed magnetic circuit between sub- iron core, and its caused magnetic flux is Φ1； Axis of rotation to be measured so that air-gap field caused by rotor conductor cutting permanent magnetic steel, produce induced electromotive force and induced-current； It is Φ that rotor conductor produces magnetic flux in the presence of induced-current2Magnetic field, magnetic flux Φ2By rotor-rotor and stator iron Air gap-stator core-bridge arm-stator core between core-air gap-rotor forms closed magnetic circuit, magnetic between rotor and stator core Logical Φ2With exporting winding intersecting chain；If rotary speed of rotator is stable, caused induced electromotive force is constant on rotor conductor, and caused electric current is constant, caused Magnetic field is constant, and each export in winding does not produce induced electromotive force；If rotor speed is unstable, rotor conductor cutting magnetic flux is Φ1Magnetic field when, there is change component in cutting speed, so that caused induced electromotive force has change point on rotor conductor Change component, thus magnetic flux Φ be present in amount, caused induced-current2There is also change component, magnetic flux Φ2Change component with it is each Individual output winding intersecting chain, induced electromotive force is produced in each output winding；After exporting the induced electromotive force superposition in winding Exported from two voltage output ends；The rotary acceleration of rotating shaft to be measured is bigger, then the magnitude of voltage of two voltage output end outputs is got over Greatly, i.e., torsional oscillation is more serious.
- A kind of 2. torsional oscillation detection method according to claim 1, it is characterised in that：The cross section of the stator core is in fan Annular；The axis of the four rolling is with the centerline axis parallel of stator core and apart from equal.
- A kind of 3. torsional oscillation detection method according to claim 1, it is characterised in that：On the both ends end face of the stator core Offer square groove；Output winding is wrapped on two square grooves.
- A kind of 4. torsional oscillation detection method according to claim 1, it is characterised in that：The stator core is by I-shaped silicon Steel disc punching is formed by stacking；Stator core is used to pass through insulation processing around the square groove position outer surface of output winding.
- A kind of 5. torsional oscillation detection method according to claim 1, it is characterised in that：Described output winding by enamel-covered wire around System forms.
- A kind of 6. torsional oscillation detection method according to claim 1, it is characterised in that：Two the first splicing blocks are by being arranged on Bolt on the expanding smaller shaft part of disk diameter of cylindricality is fixed；Two the second splicing blocks are smaller by being arranged on the expanding disk diameter of cup Bolt on shaft part is fixed.
- A kind of 7. torsional oscillation detection method according to claim 1, it is characterised in that：First described splicing block one end is provided with Triangular hill, the other end are provided with triangular shaped recess；The position pair of triangular shaped recess and triangular hill on first splicing block Should.
- A kind of 8. torsional oscillation detection method according to claim 1, it is characterised in that：Second described splicing block one end is provided with Triangular hill, the other end are provided with triangular shaped recess；The position pair of triangular shaped recess and triangular hill on second splicing block Should.
- 9. the sensor that a kind of torsional oscillation detection method as claimed in claim 1 is applied, it is characterised in that：Including bridge arm and inspection Survey unit；Described detection unit includes output winding, roller, permanent magnetic steel and stator core；The stator core medial surface Both ends be supported with two rollers；Two roller axis that stator core medial surface is supported on one end overlap；The stator The cross section of iron core is in fan annular；The axis of the four rolling is with the centerline axis parallel of stator core and apart from equal；It is fixed The center position of sub- iron core offers magnet steel groove；Magnet steel groove is embedded with permanent magnetic steel；Output winding is wound with stator core；Institute The output winding stated is formed by enamel-covered wire coiling；Described detection unit shares n, n >=2；N detection unit is arranged in order；The adjacent detection unit of any two is default Sub- iron core is connected by bridge arm；The connected mode of bridge arm and stator core is be hinged；Permanent-magnet magnetic in two neighboring detection unit The polarity of steel opposite end is identical；In n detection unit output winding around to consistent, and be arranged in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710740261.0A CN107389181B (en) | 2017-08-25 | 2017-08-25 | A kind of torsional oscillation detection method and its sensor of application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710740261.0A CN107389181B (en) | 2017-08-25 | 2017-08-25 | A kind of torsional oscillation detection method and its sensor of application |
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| Publication Number | Publication Date |
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| CN107389181A true CN107389181A (en) | 2017-11-24 |
| CN107389181B CN107389181B (en) | 2019-08-06 |
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| CN201710740261.0A Active CN107389181B (en) | 2017-08-25 | 2017-08-25 | A kind of torsional oscillation detection method and its sensor of application |
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| KR20080098131A (en) * | 2007-05-04 | 2008-11-07 | 현대중공업 주식회사 | Torsional vibration measurement of camshaft using steel band |
| CN201408075Y (en) * | 2009-05-19 | 2010-02-17 | 中国船舶重工集团公司第七一一研究所 | Cam-type torsional vibration sensor and torsional vibration measuring instrument |
| CN102288280A (en) * | 2011-05-09 | 2011-12-21 | 华北电力大学（保定） | Shafting torsional vibration extraction method |
| CN104483510A (en) * | 2014-11-03 | 2015-04-01 | 杭州电子科技大学 | Measurement rotation acceleration sensor and measurement method |
| CN106644040A (en) * | 2016-10-10 | 2017-05-10 | 广东电网有限责任公司电力科学研究院 | Rotating shaft torsional oscillation detecting method and apparatus based on multiple sensors |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080098131A (en) * | 2007-05-04 | 2008-11-07 | 현대중공업 주식회사 | Torsional vibration measurement of camshaft using steel band |
| CN201408075Y (en) * | 2009-05-19 | 2010-02-17 | 中国船舶重工集团公司第七一一研究所 | Cam-type torsional vibration sensor and torsional vibration measuring instrument |
| CN102288280A (en) * | 2011-05-09 | 2011-12-21 | 华北电力大学（保定） | Shafting torsional vibration extraction method |
| CN104483510A (en) * | 2014-11-03 | 2015-04-01 | 杭州电子科技大学 | Measurement rotation acceleration sensor and measurement method |
| CN106644040A (en) * | 2016-10-10 | 2017-05-10 | 广东电网有限责任公司电力科学研究院 | Rotating shaft torsional oscillation detecting method and apparatus based on multiple sensors |
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