CN206311623U - A kind of magnetoelectric tachometric transducer based on non-crystaline amorphous metal or nanometer crystal alloy - Google Patents
A kind of magnetoelectric tachometric transducer based on non-crystaline amorphous metal or nanometer crystal alloy Download PDFInfo
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- CN206311623U CN206311623U CN201621260369.7U CN201621260369U CN206311623U CN 206311623 U CN206311623 U CN 206311623U CN 201621260369 U CN201621260369 U CN 201621260369U CN 206311623 U CN206311623 U CN 206311623U
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Abstract
The utility model provides a kind of magnetoelectric tachometric transducer based on non-crystaline amorphous metal or nanometer crystal alloy.The sensor includes hollow shell, magnetoresistive element, and induction coil and permanent magnet in hollow shell；Magnetoresistive element one end is located in hollow shell, and attracted with permanent magnet, the other end stretches out hollow shell, and induction coil is wrapped between the two ends of the magnetoresistive element；Magnetoresistive element stretches out the Surface coating insulating materials of the part of hollow shell；Magnetoresistive element is formed through heat treatment around axle winding or after laminating cutting by amorphous alloy strips or nanometer crystal alloy band in the utility model, therefore there is magnetic conductivity high, extremely low loss and frequency range wide, the caloric value of sensor internal element is greatly reduced, while improve the response speed and certainty of measurement of sensor.
Description
Technical field
The utility model is related to the technical field of magnetoelectric tachometric transducer, especially a kind of to be based on non-crystaline amorphous metal or nanometer
The magnetoelectric tachometric transducer of peritectic alloy.
Background technology
Magnetoelectric tachometric transducer is a kind of instrument for realizing tachometric survey as general principle with magnetoelectric induction, belongs to non-and connects
Touch tachometer.Magnetoelectric tachometric transducer is made up of parts such as magnetoresistive element, permanent magnet and induction coils, and it is right to measure
During as rotating, the coil of magnetoelectric tachometric transducer can produce the magnetic line of force, and measurement object rotates cutting magnetic line, and magnetic circuit is due to magnetic
Resistive, produces electromotive force in induction coil.The measurable various permeability magnetic materials of magnetoelectric tachometric transducer are such as：Gear, impeller,
The apertured object rotating speed in the surface such as (or groove) disk (or axle) with holes, can be in the adverse circumstances such as smog, oil gas and steam
Work, be widely used in electric power, metallurgy, petrochemical industry, ship and paper industry large rotating machinery (such as steam turbine, compress it is mechanical, electrical
Machine, blower fan, pump etc.) rotating speed and overspeed measurement, while work pieces process monitor speed, steel pipe application monitor speed and
Also it is used widely in the fields such as gear rotational speed measurement.
At present, pure iron material is used the magnetoresistive element of magnetoelectric tachometric transducer more.And pure iron exist magnetic conductivity it is low, loss
The shortcomings of high, narrow frequency respective range and poor temperature stability.Therefore the problem that magnetoelectric tachometric transducer is present has：(1) it is low
Fast characteristic is poor, and (2) response frequency is low, and when rotating speed is too high, the frequency response of sensor cannot keep up with；(3) inner member heating,
For closed sensor, magnetoresistive element loss is excessive, and inner member can be caused to overheat, and results even in induction coil mistake
Heat is burnt, and has a strong impact on the reliability and accuracy of equipment.
Amorphous, nanometer crystal alloy material are prepared from using flash set technology, and its atom is in the random row of three dimensions
Row, do not have periodic lattice structure, in the absence of defects such as crystal grain, crystal boundary, dislocations, thus with excellent soft magnet performance, good
The features such as mechanical property, energy-conservation, environmental protection, product can be promoted to develop to high-performance, high stability, high frequency direction, as new
The star of Material Field.
Compared with the traditional materials such as electrical pure iron, amorphous, nanometer crystal alloy material have the following advantages that：1) energy consumption is low,
Because amorphous and nanometer crystal alloy material are higher than conventional crystal metal soft magnetic material resistivity, and amorphous, nanometer crystal alloy band
Only 25 microns of thickness, its eddy-current loss is very small；2) magnetic property is excellent, and amorphous and nanometer crystal alloy material have magnetic conductance high
Rate and low coercivity, the tens even hundred times of the magnetic conductivity of such as Fe-based amorphous alloy up to electrical pure iron；3) work is prepared
Skill is simple and quick, environmental protection；4) temperature stability is high, and the magnetic property of amorphous and nanometer crystal alloy material is in device operating temperature
In the range of (in the range of -50 DEG C to 180 DEG C) change it is small；5) aging stability is high；6) magnetic impact good stability；7) mechanically stable
Property is high；8) the applicable frequency of frequency adaptation wide ranges, amorphous and nanometer crystal alloy material is tens to hundreds of KHzs, is pure iron
Hundred times.
Therefore, the combination property of the magnetoelectric tachometric transducer for being prepared by amorphous or nanometer crystal alloy is higher, it is possible to decrease pass
The temperature rise of sensor, while the rotating speed response frequency high and certainty of measurement of sensor can be improved.
Utility model content
For the above-mentioned state of the art, the utility model aims to provide a kind of magneto-electric based on amorphous or nanometer crystal alloy and turns
Fast sensor, the magnetoelectric tachometric transducer has low-temperature-rise, response frequency high and high measurement accuracy.
In order to realize above-mentioned technical purpose, the technical scheme that the utility model is used for：
A kind of magnetoelectric tachometric transducer based on amorphous or nanometer crystal alloy, including hollow shell, magnetoresistive element, and
Induction coil and permanent magnet in hollow shell；Magnetoresistive element one end is located in hollow shell, attracted with permanent magnet, separately
Hollow shell is stretched out in one end, and induction coil is wrapped between the two ends of the magnetoresistive element；Magnetoresistive element stretches out the portion of hollow shell
The Surface coating insulating materials for dividing, for being isolated from the outside；
During working condition, object under test is rotated and cutting magnetic line, causes the magnetic resistance of magnetoresistive element to change, the line of induction
Circle produces induced electromotive force output；
It is characterized in that：Described magnetoresistive element be by amorphous alloy strips or nanometer crystal alloy band after axle winding through heat
Treatment is formed, or by amorphous alloy strips or nanometer crystal alloy band laminate cutting after through heat treatment form.
Described non-crystaline amorphous metal or nanometer crystal alloy includes but is not limited to Fe-based amorphous alloy, iron ni-based amorphous alloy, iron
One kind in cobalt base amorphous alloy, cobalt base amorphous alloy, iron-base nanometer crystal alloy, iron cobalt-based nanometer crystal alloy etc.；Preferably,
Described non-crystaline amorphous metal or nanometer crystal alloy are the one kind in Fe-based amorphous alloy or iron-base nanometer crystal alloy.
Preferably, in described magnetoresistive element, the end face radius of one end attracted with permanent magnet is more than stretching out hollow
The end face radius of one end of shell.
Described insulating materials is not limited, including epoxy resin, acrylic, polyurethane, copolymer (acrylate urethane),
One or more in silica gel etc..
The method for coating of described insulating materials is not limited, including brushing method, dip coating, spraying process or electrophoretic deposition etc. in
One kind, preferably dip coating.
Preferably, the thickness of described insulating materials is 0.01~0.05mm.
In order to the element for protecting enclosure is isolated with external environment, while prevent magnetoresistive element from departing from from front end, as
It is preferred that, the induction coil, the gap filling encapsulant between magnetoresistive element, permanent magnet and hollow shell.Described encapsulation
Agent is not limited, including epoxy resin, polyacetal resin, silica gel etc. in one or more.
Consolidating for magnetoresistive element is reduced because hollow shell is stretched out in one end of magnetoresistive element by the opening of hollow shell
It is qualitative, preferably, close to end face diameter the opening more than the hollow shell of hollow shell openend in described magnetoresistive element
Mouth diameter, so as to prevent magnetoresistive element from departing from from the opening.
For elements such as the induction coil inside fixing shell, magnetoresistive elements, preferably in induction coil, magnetoresistive element, forever
Gap between magnet and hollow shell sets fastener, such as through support etc..
In order to protect inner member to isolate with external environment, while prevent magnetoresistive element from departing from from front end, preferably in sensing
Gap filling encapsulant between coil, magnetoresistive element, permanent magnet and shell.
Described permanent magnet material is not limited, preferably the one kind in NbFeB, AlNiCo, SmCo.
The hollow shell material is not limited, including steel, stainless steel, aluminium and its alloy, copper and its alloy, titanium and its conjunction
Gold, ceramics, engineering plastics etc..Preferably, described hollow shell is non-magnetic rustproof Steel material, it is effective against outside dry
Disturb.
The material of the axle is not limited, including the one kind in engineering plastics, steel, aluminium, soft-magnetic stainless steel or soft magnetic ferrite,
Preferably soft-magnetic stainless steel.
The diameter of the axle is preferably 0.5mm~1mm.
In sum, magnetoresistive element is used in amorphous alloy material in the magnetoelectric tachometric transducer that the utility model is provided
Or nanometer crystal alloy material, structure is wound as around axle by by non-crystaline amorphous metal or nanometer crystal alloy band, it is then thermally treated
Form, or be cut into structure after non-crystaline amorphous metal or nanometer crystal alloy band are laminated, it is then thermally treated to form.With it is existing
Technology is compared, and the utility model has the advantages that：
(1) compared with the traditional materials such as pure iron, amorphous nano-crystalline alloy material has that magnetic property is excellent, energy consumption is low, temperature
Stability advantage high and response frequency wide ranges, reduces the heating of sensor internal element, and improve revolution speed sensing
The stability and certainty of measurement of device；
(2) using by non-crystaline amorphous metal or nanometer crystal alloy band around axle wind or laminate be cut into structure after be heat-treated
Method, solve block amorphous alloy or nanometer crystal alloy is influenceed nothing by critical dimension, the casting factor such as efficiency and processability
Method is applied directly on sensor, and the non-crystaline amorphous metal or nanometer crystal alloy of powder compacting have the limit that low magnetic permeability etc. is difficult to overcome
System cannot also be applied to the problem on magnetic valve.In addition, the magnetic resistance of different structure can according to actual needs be obtained by the method
Element；
(3) the utility model magnetoresistive element stretches out the part insulating barrier that is isolated from the outside of cladding of sensor, it is to avoid magnetic
The direct exposed surface of resistance element and the problems such as cause oxidation, corrode or rub scaling-off, and the building rings such as damp and hot, greasy dirt can be undergone
Border.
Therefore, speed probe of the present utility model has the advantages that temperature rise is low, response frequency is high and certainty of measurement is high, tool
There is good application prospect.
Brief description of the drawings
Fig. 1 is that the structure of the magnetoelectric tachometric transducer based on iron ni-based amorphous alloy in the utility model embodiment 1 is shown
It is intended to；
Fig. 2 is the mplifying structure schematic diagram of the magnetoresistive element in the utility model embodiment 1；
Fig. 3 is the structural representation of the magnetoelectric tachometric transducer based on cobalt non-crystaline amorphous metal in the utility model embodiment 2；
Fig. 4 is the mplifying structure schematic diagram of the magnetoresistive element in the utility model embodiment 2；
Fig. 5 is the structure of the magnetoelectric tachometric transducer based on iron nickel base nanometer peritectic alloy in the utility model embodiment 3
Schematic diagram.
Specific embodiment
The utility model is described in further detail with embodiment below in conjunction with accompanying drawing, it should be pointed out that following institute
State embodiment to be intended to be easy to understanding of the present utility model, and do not play any restriction effect to it.
Reference in Fig. 1-5 is：1- shells, stretch in 101- shells and frame B, the 2- line of induction are stretched in frame A, 102- shell
Circle, 3- magnetoresistive elements, 301- axles, 302- magnetoresistive elements A, 303- magnetoresistive element B, 304- magnetoresistive element C, 4- encapsulant, 5- is forever
Magnet, 6- nuts, 7- wires, 8- insulating barriers, 9- gears.
Embodiment 1：
Present embodiments provide a kind of magnetoelectric tachometric transducer based on iron ni-based amorphous alloy.
As shown in Figure 1-2, the sensor is included with hollow shell 1, induction coil 2, magnetoresistive element 3, permanent magnet 5, envelope
Dress agent 4 and wire 7.Induction coil 2 is located in hollow shell 1 with permanent magnet 5.
Magnetoresistive element 3 selects iron ni-based amorphous alloy material.As shown in Fig. 2 magnetoresistive element 3 mainly includes magnetoresistive element
A302 and magnetoresistive element B303.Magnetoresistive element A302 and magnetoresistive element B303 is by two kinds of iron ni-based amorphous alloy of different in width
It is wound up on axle 301, then the annealed and curing process cylindric component for having gradient.A diameter of 0.5mm of axle 301.
One end of magnetoresistive element B303 is attracted with one end of permanent magnet 5, one end of magnetoresistive element A302 and magnetoresistive element
B303 is connected, and the other end stretches out hollow shell 1, the rotating speed for detecting object under test.Induction coil 2 is wrapped in magnetoresistive element
On A302.
Magnetoresistive element A302 stretches out the Surface coating insulating barrier 8 of the part of shell 1, for making magnetoresistive element be isolated from the outside,
The thickness of insulating barrier 8 is 0.01mm.
Encapsulant 5 is filled in the gap between induction coil 2, magnetoresistive element 3, permanent magnet 5 and shell 1.Nut 6 is used for
Fixed sensor.1.5 meters of wire 7 is drawn in the one end of sensor outer housing 1, for back-end devices such as connecting test and displays.
Hollow shell 1 is non-magnetic rustproof Steel material.
Insulating barrier 8 is polyurethane microthin coating.
Encapsulant 5 is silica gel.
Object under test is gear 9.During working condition, gear 9 rotates, and its tooth top and tooth paddy are alternately across sensor magnetic
Meeting cutting magnetic line causes the magnetic resistance of magnetoresistive element 3 to change during resistance element 3, and induction coil produces induced electromotive force output,
Rotary speed information is known according to the induced electromotive force.
Embodiment 2：
Present embodiments provide a kind of magnetoelectric tachometric transducer based on cobalt base amorphous alloy.
As shown in Figure 3-4, the structure of the magnetoelectric tachometric transducer in the structure and embodiment 1 is basic for the sensor construction
It is identical, except that：(1) hollow shell 1 is stainless steel material；(2) magnetoresistive element A302 and magnetoresistive element B303 is cobalt-based
Amorphous alloy material；(3) as shown in figure 4, magnetoresistive element 3 mainly includes magnetoresistive element A302, magnetoresistive element B303 and magnetic resistance unit
Part C304, the magnetoresistive element 3 be to be wound, processed and solidified around axle 301 by three kinds of cobalt base amorphous alloy bands of different in width and
Into.Shell 1 is stretched out in one end of magnetoresistive element C304 in magnetoresistive element 3, because magnetoresistive element A302 is socketed in magnetoresistive element C304
Surface, its end face diameter therefore can prevent the disengaging of test process magnetoresistive element more than the opening diameter of shell.
The magnetoelectric tachometric transducer of said structure increased the stability of inner member and the reliability of device, and have
There are good corrosion resistance, impact resistance and wearability.
Embodiment 3：
Present embodiments provide a kind of magnetoelectric tachometric transducer based on iron nickel base nanometer peritectic alloy.
The structure of the magnetoelectric tachometric transducer as figure 5 illustrates, the magnetoelectric tachometric transducer knot in the structure and embodiment 2
Structure is essentially identical, except that magnetoresistive element 3 is iron nickel base nanometer peritectic alloy material, with iron-based, the cobalt in embodiment 1 and 2
Base noncrystal alloy material is compared, and its iron loss is lower, frequency response range is wider.
In addition, as shown in figure 5, the present embodiment eliminates encapsulant, frame is stretched using being stretched in shell in frame A101 and shell
B102 is used for the inner members such as fixed inductor, magnetoresistive element and permanent magnet, and preparation technology is simpler.
The magnetoelectric tachometric transducer of said structure eliminates encapsulant, reduces fill process and chemical contamination.Therefore
The magnetoelectric tachometric transducer has the advantages that frequency response range is wider, energy consumption is low and environmental protection.
Above-described embodiment is used for illustrating the utility model, is limited rather than to the utility model, in this practicality
In new spirit and scope of the claims, any modifications and changes made to the utility model both fall within this reality
With new protection domain.
Claims (7)
1. a kind of magnetoelectric tachometric transducer based on non-crystaline amorphous metal or nanometer crystal alloy, it is characterized in that：Including hollow shell, position
In induction coil and permanent magnet in hollow shell, and passed through after axle winding by amorphous alloy strips or nanometer crystal alloy band
Heat treatment is formed, or by amorphous alloy strips or nanometer crystal alloy band laminate cutting after through be heat-treated magnetic resistance unit
Part；Magnetoresistive element one end is located in hollow shell, attracted with permanent magnet, and the other end stretches out hollow shell, induction coil winding
Between the two ends of the magnetoresistive element；Magnetoresistive element stretches out the Surface coating insulating materials of the part of hollow shell；
During working condition, object under test is rotated and cutting magnetic line, causes the magnetic resistance of magnetoresistive element to change, and induction coil is produced
Raw induced electromotive force output.
2. the magnetoelectric tachometric transducer of non-crystaline amorphous metal or nanometer crystal alloy is based on as claimed in claim 1, it is characterized in that：Institute
The thickness of the insulating materials stated is 0.01~0.05mm.
3. the magnetoelectric tachometric transducer of non-crystaline amorphous metal or nanometer crystal alloy is based on as claimed in claim 1, it is characterized in that：Institute
State a diameter of 0.5mm~1mm of axle.
4. the magnetoelectric tachometric transducer of non-crystaline amorphous metal or nanometer crystal alloy is based on as claimed in claim 1, it is characterized in that：Institute
In the magnetoresistive element stated, the end face radius of one end attracted with permanent magnet is more than the end face half of the one end for stretching out hollow shell
Footpath.
5. the magnetoelectric tachometric transducer of non-crystaline amorphous metal or nanometer crystal alloy is based on as claimed in claim 1, it is characterized in that：Institute
Close to the opening diameter of the end face diameter more than the hollow shell of hollow shell openend in the magnetoresistive element stated.
6. the magnetoelectric tachometric based on non-crystaline amorphous metal or nanometer crystal alloy as described in any claim in claim 1 to 5
Sensor, it is characterized in that：The induction coil, the gap filling encapsulant between magnetoresistive element, permanent magnet and hollow shell.
7. the magnetoelectric tachometric based on non-crystaline amorphous metal or nanometer crystal alloy as described in any claim in claim 1 to 5
Sensor, it is characterized in that：Gap between induction coil, magnetoresistive element, permanent magnet and hollow shell sets fastener.
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| CN201621260369.7U CN206311623U (en) | 2016-11-21 | 2016-11-21 | A kind of magnetoelectric tachometric transducer based on non-crystaline amorphous metal or nanometer crystal alloy |
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| CN201621260369.7U CN206311623U (en) | 2016-11-21 | 2016-11-21 | A kind of magnetoelectric tachometric transducer based on non-crystaline amorphous metal or nanometer crystal alloy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884195A (en) * | 2017-10-12 | 2018-04-06 | 北京航天动力研究所 | A kind of speed probe and rotation-speed measuring device |
| CN108089025A (en) * | 2016-11-21 | 2018-05-29 | 中国科学院宁波材料技术与工程研究所 | A kind of magnetoelectric tachometric transducer based on non-crystaline amorphous metal or nanometer crystal alloy |
-
2016
- 2016-11-21 CN CN201621260369.7U patent/CN206311623U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108089025A (en) * | 2016-11-21 | 2018-05-29 | 中国科学院宁波材料技术与工程研究所 | A kind of magnetoelectric tachometric transducer based on non-crystaline amorphous metal or nanometer crystal alloy |
| CN107884195A (en) * | 2017-10-12 | 2018-04-06 | 北京航天动力研究所 | A kind of speed probe and rotation-speed measuring device |
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