CN104155468B - For measuring the magnet steel sensing collar of machinery equipment rotating shaft speed - Google Patents
For measuring the magnet steel sensing collar of machinery equipment rotating shaft speed Download PDFInfo
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- CN104155468B CN104155468B CN201410401898.3A CN201410401898A CN104155468B CN 104155468 B CN104155468 B CN 104155468B CN 201410401898 A CN201410401898 A CN 201410401898A CN 104155468 B CN104155468 B CN 104155468B
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Abstract
nullThe invention provides a kind of magnet steel sensing collar for measuring machinery equipment rotating shaft speed，It is characterized in that: include matrix and several Nd-Fe-B magnet steel unit of annular，Several Nd-Fe-B magnet steel unit described are the most uniformly embedded in described matrix，This magnet steel sensing collar for measuring machinery equipment rotating shaft speed is used as the sensing object of magnetoelectric tachometric transducer with the structure of Nd-Fe-B magnet steel unit embedded in the matrix of annular，Matrix has the mellow and full smooth outer wall being different from the fluted disc sharp outer rim of wheel，Both serious vibration will not have been produced when with rotating shaft High Rotation Speed，Also surrounding devices will not be produced and threaten，The sensitivity and the accuracy that make magnetoelectric tachometric transducer collection data are greatly improved，Additionally，This magnet steel sensing thimble structure for measuring machinery equipment rotating shaft speed is the most ingenious，Compact，Easily processing，It is suitable for the assembling of various phase plant equipment front and back to use.
Description
Technical field
The present invention relates to rotating shaft velocity measuring technique field, particularly relate to a kind of magnet steel sensing collar for measuring machinery equipment rotating shaft speed.
Background technology
In order to measure the slewing rate of rotating shaft, magnetoelectric tachometric transducer typically can be installed on the measured axis of plant equipment operating, magnetoelectric tachometric transducer is mainly made up of permanent-magnet steel, iron core, induction coil etc., it is to cause flux change according to magnetic resistance change rate in magnetic circuit, thus in coil, produce the principle work of induced potential.Fluted disc wheel (halved irony fluted disc wheel it is mounted with on measured axis, there is multiple tooth or hypodontia above), the induction coil of magnetoelectric tachometric transducer keeps spacing geo-stationary with fluted disc wheel, when measured axis driven gear rotates, gap generating period change between iron core and the tooth of gear, make magnetic resistance in magnetic circuit also produce respective change, thus cause the magnetic flux by coil to change, induction coil just produces alternation induced potential.Specifically, when the tooth root of fluted disc wheel is just to induction coil, the magnetic line of force of generation more disperses, and magnetic field is relatively weak, and when the tooth top of fluted disc wheel is just to induction coil, the magnetic line of force of generation is more concentrated, and magnetic field is the strongest.Magnetoelectric tachometric transducer is through the change of density of line of magnetic force, Hall voltage is produced when the magnetic line of force is through the sensing element on sensor, and can be converted and become alternate electrical signal, signal can be adjusted and amplify by the built-in circuit of last magnetoelectric tachometric transducer, output matrix pulse signal, by being calculated rotating speed.
Thus it is seen that, use magnetoelectric tachometric transducer that the change in magnetic field when measuring, have to be utilized, therefore when measuring the equipment of non-ferromagnetic material, need to install in advance special magnet material, in order to change the magnetic field around sensor, such magnetoelectric tachometric transducer could capture the motion state of rotating shaft exactly.Although fluted disc wheel can be as the sensing object of magnetoelectric tachometric transducer, but fluted disc wheel is only applicable to the equipment of middle and slow speed of revolution, during because the rotating speed after to be measured is the highest, the fluted disc wheel rotated cans be compared to an electric saw, there is severe compromise, and the fluted disc wheel of high-speed rotation can produce strong vibration and gross distortion, there is the biggest error in the data causing sensor to collect, have impact on the accuracy of final data.Additionally, fluted disc size of wheel is relatively big, installs and also limited by space and rotating shaft position.
Summary of the invention
The technical problem to be solved in the present invention is: in order to use fluted disc wheel to there is major defect as the sensing object of magnetoelectric tachometric transducer in security and measure error in prior art, the invention provides a kind of magnet steel sensing collar for measuring machinery equipment rotating shaft speed, use and there is the annular matrix of mellow and full outer rim and as the combining structure of Nd-Fe-B magnet steel unit of sensing object of magnetoelectric tachometric transducer to solve the problems referred to above.
The technical solution adopted for the present invention to solve the technical problems is: a kind of magnet steel sensing collar for measuring machinery equipment rotating shaft speed, including matrix and several Nd-Fe-B magnet steel unit of annular, several Nd-Fe-B magnet steel unit described are the most uniformly embedded in described matrix.
Concrete, described Nd-Fe-B magnet steel unit is cylindrical, described matrix the most uniformly offers several through holes that quantity is identical with described Nd-Fe-B magnet steel unit, several Nd-Fe-B magnet steel unit described are embedded respectively in several through holes described, and all vertical axis with described matrix of the axis of each described Nd-Fe-B magnet steel unit also passes the center of described matrix.
As preferably, described through hole is divided into the first cylindrical hole and the second cylindrical hole from inwall to the outer wall of described matrix, the diameter of described first cylindrical hole is than the big 0.2 ~ 0.5mm of diameter of described Nd-Fe-B magnet steel unit, axial length is more than or equal to the axial length of described Nd-Fe-B magnet steel unit, and the diameter of described second cylindrical hole is less than the diameter of described Nd-Fe-B magnet steel unit.
As preferably, between described first cylindrical hole and described Nd-Fe-B magnet steel unit, it is also coated with silica gel.
As preferably, described matrix is radially divided into the Part I and Part II docked mutually, and described Part I is detachable with Part II fixing.
nullConcrete，Described Part I and Part II are shape、The semi-circular shape that size is consistent，One end of described Part I is circumferentially protruding is parallel to the first flat board radially，Other end is circumferentially protruding has two to be parallel to the second flat board radially，Described two the second flat boards and described Part I constitute the first groove，Corresponding described first flat board and the first groove，The two ends of described Part II are respectively provided with two the 3rd flat boards and fourth panel，Described two the 3rd flat boards and described Part II constitute the second groove，The spacing of described two the second flat boards is slightly larger than the thickness of described fourth panel，The spacing of described two the 3rd flat boards is slightly larger than the thickness of described first flat board，First axially extending bore is offered the most respectively on described first flat board and two the 3rd flat boards，Described first flat board is stretched into the second groove and is fastened with described two the 3rd flat boards by screw bolt and nut，Second axially extending bore is offered the most respectively in described fourth panel and two the second flat boards，Described fourth panel is stretched into the first groove and is fastened with described two the second flat boards by screw bolt and nut.
Concrete, the material of described matrix is aluminium.
The invention has the beneficial effects as follows, this magnet steel sensing collar for measuring machinery equipment rotating shaft speed is used as the sensing object of magnetoelectric tachometric transducer with the structure of Nd-Fe-B magnet steel unit embedded in the matrix of annular, matrix has the mellow and full smooth outer wall being different from the fluted disc sharp outer rim of wheel, both serious vibration will not have been produced when with rotating shaft High Rotation Speed, also surrounding devices will not be produced and threaten, the sensitivity and the accuracy that make magnetoelectric tachometric transducer collection data are greatly improved, additionally, this magnet steel sensing thimble structure for measuring machinery equipment rotating shaft speed is the most ingenious, compact, easily processing, it is suitable for the assembling of various phase plant equipment front and back to use.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is that the present invention is for measuring the structural representation of the optimum embodiment of the magnet steel sensing collar of machinery equipment rotating shaft speed.
Fig. 2 is that the present invention is for measuring the longitudinal section view of the magnet steel sensing collar of machinery equipment rotating shaft speed.
Fig. 3 is that the present invention is for measuring the assembling schematic diagram of the magnet steel sensing collar of machinery equipment rotating shaft speed.
In figure 1, matrix, 2, Nd-Fe-B magnet steel unit, 3, bolt, 4, magnetoelectric tachometric transducer, 5, rotating shaft, the 6, first cylindrical hole, the 7, second cylindrical hole.
Detailed description of the invention
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, and the basic structure of the present invention is described the most in a schematic way, and therefore it only shows the composition relevant with the present invention.
nullAs shown in Figure 1 and 2，The invention provides a kind of magnet steel sensing collar for measuring machinery equipment rotating shaft speed，Aluminum matrix 1 and several Nd-Fe-B magnet steel unit 2 including annular，Nd-Fe-B magnet steel unit 2 is cylindrical，Matrix 1 the most uniformly offers several through holes that quantity is identical with Nd-Fe-B magnet steel unit 2，Several Nd-Fe-B magnet steel unit 2 are embedded respectively in several through holes，The axis of each Nd-Fe-B magnet steel unit 2 is all vertical with the axis of matrix 1 and the center that passes matrix 1，Nd-Fe-B magnet steel magnetic force magnetic force is the most long、Magnetic stability、Volume is little，It is highly suitable as the sensing object of magnetoelectric tachometric transducer 4，The quantity of Nd-Fe-B magnet steel unit 2 does not the most limit，But in a practical situation，Magnet steel sensing collar when rotating shaft 5 runs up is it may happen that trickle vibration，Cause the missing measurement of Nd-Fe-B magnet steel unit 2，The accuracy of measurement result can be produced impact，In order to ensure certainty of measurement and stability，Those skilled in the art can be according to the actual size of rotating shaft 5，Determine the quantity of Nd-Fe-B magnet steel unit 2.
Through hole is divided into the first cylindrical hole 6 and the second cylindrical hole 7 from inwall to the outer wall of matrix 1, the diameter 0.3mm bigger than the diameter of Nd-Fe-B magnet steel unit 2 of the first cylindrical hole 6, make Nd-Fe-B magnet steel unit 2 can embed in the first cylindrical hole 6 smoothly, axial length is more than or equal to the axial length of Nd-Fe-B magnet steel unit 2, the diameter of the second cylindrical hole 7 is less than the diameter of Nd-Fe-B magnet steel unit 2, matrix 1 is when rotating with rotating shaft 5, centrifugal force can make Nd-Fe-B magnet steel unit 2 have radially movement tendency, second cylindrical hole 7 can prevent Nd-Fe-B magnet steel unit 2 to be thrown out of, also the magnetic head inductive effects to it of magnetoelectric tachometric transducer 4 is not interfered with.
Owing to having trickle gap between the first cylindrical hole 6 and Nd-Fe-B magnet steel unit 2, therefore when loading, in the first cylindrical hole 6, first coat a little silica gel, then Nd-Fe-B magnet steel unit 2 is embedded, prevent it from departing from.
nullThe installation of the magnet steel sensing collar for convenience，Matrix 1 is radially divided into the Part I and Part II docked mutually，Part I is detachable with Part II fixing，Part I and Part II are shape、The semi-circular shape that size is consistent，One end of Part I is circumferentially protruding is parallel to the first flat board radially，Other end is circumferentially protruding has two to be parallel to the second flat board radially，Two the second flat boards and Part I constitute the first groove，Corresponding first flat board and the first groove，The two ends of Part II are respectively provided with two the 3rd flat boards and fourth panel，Two the 3rd flat boards and Part II constitute the second groove，The spacing of two the second flat boards is slightly larger than the thickness of fourth panel，The spacing of two the 3rd flat boards is slightly larger than the thickness of the first flat board，First axially extending bore is offered the most respectively on first flat board and two the 3rd flat boards，First flat board is stretched into the second groove and is fastened by bolt 3 and nut and two the 3rd flat boards，Second axially extending bore is offered the most respectively in fourth panel and two the second flat boards，Fourth panel is stretched into the first groove and is fastened by bolt 3 and nut and two the second flat boards.
As shown in Figure 3, when assembling, first the Part I of matrix 1 and one end bolt 3 of Part II connected and the most do not tighten the bolt 3 of this one end, making between Part I and Part II can transmission relatively, Part I and Part II is facilitated to be flared out being sleeved in rotating shaft 5, with bolt 3, Part I and Part II other end are connected fixing the most again, the most again the bolt 3 at two ends is tightened；The internal diameter of matrix 1 is identical with the outside dimension of rotating shaft 5, makes it Fine Boring in rotating shaft 5, and to guarantee rotating shaft 5, when running up, the magnet steel sensing collar will not loose or dislocation.Magnetoelectric tachometric transducer 4 can select mount point to install according to actual environment, the magnetic head making it keeps axiality with Nd-Fe-B magnet steel unit 2, and magnetic head and matrix 1 outer wall must not exceed 6mm, spacing is crossed conference and is caused magnetic head to sense less than Nd-Fe-B magnet steel unit 2, affect the accuracy of measurement data, but spacing can not be too small, otherwise during rotating shaft 5 runs up, matrix 1 may encounter the magnetic head of Hall revolution speed transducer, causes unnecessary loss.
When rotating shaft 5 rotates, the magnet steel sensing collar can be through the front end of magnetic head, cause the respective change in magnetic field, when Nd-Fe-B magnet steel unit 2 is just to magnetic head, the magnetic line of force produced through magnetic head is more concentrated, and magnetic field is relatively strong, when Nd-Fe-B magnet steel unit 2 is to magnetic head deviation magnetic head, the magnetic line of force produced through magnetic head more disperses, and magnetic field is the most relatively weak.The magnetoelectric tachometric transducer 4 change by density of line of magnetic force, produces Hall voltage, and is converted and becomes alternate electrical signal, and signal can be adjusted and amplify by the built-in circuit of last magnetoelectric tachometric transducer 4, and output matrix pulse signal, by being calculated rotating speed.
With the above-mentioned desirable embodiment according to the present invention for enlightenment, by above-mentioned description, relevant staff can carry out various change and amendment completely in the range of without departing from this invention technological thought.The content that the technical scope of this invention is not limited on specification, it is necessary to determine its technical scope according to right.
Claims (6)
1. one kind senses the collar for measuring the magnet steel of machinery equipment rotating shaft speed, it is characterised in that: including matrix and several Nd-Fe-B magnet steel unit of annular, several Nd-Fe-B magnet steel unit described are the most uniformly embedded in described matrix；
Described Nd-Fe-B magnet steel unit is cylindrical, described matrix the most uniformly offers several through holes that quantity is identical with described Nd-Fe-B magnet steel unit, several Nd-Fe-B magnet steel unit described are embedded respectively in several through holes described, and all vertical axis with described matrix of the axis of each described Nd-Fe-B magnet steel unit also passes the center of described matrix.
2. the magnet steel sensing collar for measuring machinery equipment rotating shaft speed as described in claim 1, it is characterized in that: described through hole is divided into the first cylindrical hole and the second cylindrical hole from inwall to the outer wall of described matrix, the diameter of described first cylindrical hole is than the big 0.2 ~ 0.5mm of diameter of described Nd-Fe-B magnet steel unit, axial length is more than or equal to the axial length of described Nd-Fe-B magnet steel unit, and the diameter of described second cylindrical hole is less than the diameter of described Nd-Fe-B magnet steel unit.
3. the magnet steel sensing collar for measuring machinery equipment rotating shaft speed as described in claim 2, it is characterised in that: it is also coated with silica gel between described first cylindrical hole and described Nd-Fe-B magnet steel unit.
4. the magnet steel sensing collar for measuring machinery equipment rotating shaft speed as described in claim 1, it is characterised in that: described matrix is radially divided into the Part I and Part II docked mutually, and described Part I is detachable with Part II fixing.
null5. the magnet steel sensing collar for measuring machinery equipment rotating shaft speed as described in claim 4，It is characterized in that: described Part I and Part II are shape、The semi-circular shape that size is consistent，One end of described Part I is circumferentially protruding is parallel to the first flat board radially，Other end is circumferentially protruding has two to be parallel to the second flat board radially，Described two the second flat boards and described Part I constitute the first groove，Corresponding described first flat board and the first groove，The two ends of described Part II are respectively provided with two the 3rd flat boards and fourth panel，Described two the 3rd flat boards and described Part II constitute the second groove，The spacing of described two the second flat boards is slightly larger than the thickness of described fourth panel，The spacing of described two the 3rd flat boards is slightly larger than the thickness of described first flat board，First axially extending bore is offered the most respectively on described first flat board and two the 3rd flat boards，Described first flat board is stretched into the second groove and is fastened with described two the 3rd flat boards by screw bolt and nut，Second axially extending bore is offered the most respectively in described fourth panel and two the second flat boards，Described fourth panel is stretched into the first groove and is fastened with described two the second flat boards by screw bolt and nut.
6. the magnet steel sensing collar for measuring machinery equipment rotating shaft speed as described in claim 1, it is characterised in that: the material of described matrix is aluminium.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410401898.3A CN104155468B (en) | 2014-08-14 | 2014-08-14 | For measuring the magnet steel sensing collar of machinery equipment rotating shaft speed |
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| CN201410401898.3A CN104155468B (en) | 2014-08-14 | 2014-08-14 | For measuring the magnet steel sensing collar of machinery equipment rotating shaft speed |
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| CN104155468A CN104155468A (en) | 2014-11-19 |
| CN104155468B true CN104155468B (en) | 2016-08-24 |
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| CN109357833B (en) * | 2018-11-12 | 2024-02-23 | 广西科技大学 | Sensor mounting device for vortex-induced vibration test of suspended span pipeline |
| CN110261639A (en) * | 2019-06-05 | 2019-09-20 | 广州文冲船厂有限责任公司 | It is a kind of for measuring the device and its working method of axis revolving speed |
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| JP2003097582A (en) * | 2001-09-27 | 2003-04-03 | Nsk Ltd | Bearing device with sensor |
| CN2864680Y (en) * | 2005-12-02 | 2007-01-31 | 包头稀土研究院 | Iron-matrix block amorphous rotation speed sensor |
| TW201323718A (en) * | 2011-12-08 | 2013-06-16 | Chin-Chao Wang | Internal rotating jet pump |
| CN202676729U (en) * | 2012-03-17 | 2013-01-16 | 佛山市顺德区海伦宝电器有限公司 | Magnetic induction rotation speed measuring device |
| CN203572836U (en) * | 2013-08-27 | 2014-04-30 | 朱寿康 | Magnetoelectric revolution meter |
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Denomination of invention: Magnet induction lantern ring used for measuring rate of rotating shaft of mechanical equipment Effective date of registration: 20200312 Granted publication date: 20160824 Pledgee: NEW UNITED RAIL TRANSIT TECHNOLOGY Co.,Ltd. Pledgor: XIN YU GROUP Co.,Ltd. Registration number: Y2020980000649 |
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