CN105865540A - Turbine sensor structure adopting permanent magnet maglev - Google Patents
Turbine sensor structure adopting permanent magnet maglev Download PDFInfo
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- CN105865540A CN105865540A CN201610280304.7A CN201610280304A CN105865540A CN 105865540 A CN105865540 A CN 105865540A CN 201610280304 A CN201610280304 A CN 201610280304A CN 105865540 A CN105865540 A CN 105865540A
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- magnetic ring
- turbine
- ring
- shaft core
- magnetic suspension
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
- G01F1/22—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow by variable-area meters, e.g. rotameters
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a turbine sensor structure adopting permanent magnet maglev. The turbine sensor structure comprises a signal acquiring bin and a signal processing bin fixed on the signal acquiring bin, wherein an axially loaded magnetic bearing is fixed in the signal acquiring bin through a central frame, and a turbine is arranged on the outer wall of the axially loaded magnetic bearing, signal acquiring magnetic steel is mounted at ends, away from the axially loaded magnetic bearing, of the turbine; a Hall switch and a signal processing circuit are mounted in the signal processing bin, and the Hall switch is adapted to the signal acquiring magnetic steel. The turbine sensor structure has the remarkable effects as follows: a permanent magnet maglev technology is applied, friction produced due to contact is avoided, rotation of the turbine is quite flexible, and the measuring accuracy of a sensor is improved; the requirement for the cleanliness of a measuring environment is not high, lubrication and cleaning are not needed, the operation is stable and reliable, maintenance is not needed for long-time use, the manufacturing cost and the use cost are not high, and the structure is suitable for being popularized in a large range.
Description
Technical field
The present invention relates to turbine flowmeter technical field, specifically, be a kind of permanent magnetism magnetcisuspension
Swimming vortex wheel sensing arrangement.
Background technology
At present, the turbine flowmeter and the current meter that use turbine rotor sensor production are measured because of it
Precision is high, low price, pressure height, working stability and be widely used in various fields of measurement.
And the link of most critical is as much as possible in the flow sensor of turbine flowmeter and current meter
Making turbine rotation flexible, using is most widely to support turbine with high-precision bearing or thimble
With fluid rotation, therefore it is required that the coefficient of friction of bearing or thimble is the least.
But, such effect bearing to be reached or thimble precision just requires the highest, it is also desirable to have
Sufficiently lubrication.Thus occur in that some drawbacks: bearing or thimble precision its gap the highest are just
The least, the least impurity will block and make turbine rotation be affected, to the cleaning using environment
Degree requires height, and needs to arrange a set of lubricating structure, and lubricating oil is also required to often change, dimension
Protect cost the highest.Such structure can produce in the measurements much affects the uncertain of certainty of measurement
Factor.
The new technique that a kind of electromagnetic suspension is applied in sensors with auxiliary electrode occurs in recent years, can be very
The problem that good solution affects turbine rotation flexibility ratio.But solenoid needs continual
Power supply, just cannot suspend once power-off or electricity shortage turbine, and sensor can not work, this
Time sensor continue to run with and will damage；The short power consumption of solenoid life of continuous firing is big；
Manufacturing cost is also much higher than tradition axle or thimble-type sensor.Although employing electromagnetism magnetic suspension
The turbine rotor sensor of technology solves a portion of techniques difficult problem for sensors with auxiliary electrode, but also produces
The newest failure factor, so sensors with auxiliary electrode technology exists bigger technological deficiency, uncomfortable
Close and promote on a large scale.
Summary of the invention
For the deficiencies in the prior art, it is an object of the invention to provide a kind of permanent magnetism magnetic suspension turbine
Sensing arrangement, this sensor uses the turbine rotor sensor of permanent magnetism magnetic suspension technology, and turbine turns
Dynamic extremely flexible, to measuring, environment cleannes are less demanding, it is not necessary to lubrication, stable and reliable in work,
Use Maintenance free for a long time, suitable for large-scale promotion.
For reaching above-mentioned purpose, the technical solution used in the present invention is as follows:
A kind of permanent magnetism magnetic suspension turbine sensing arrangement, it it is critical only that: include signals collecting storehouse with
It is fixed on the signal processing storehouse on this signals collecting storehouse, in described signals collecting storehouse, passes through center
Frame is fixed with axially loaded magnetic suspension bearing, on the outer wall of described axially loaded magnetic suspension bearing
It is provided with turbine, this turbine end away from described axially loaded magnetic suspension bearing is respectively mounted
There is signals collecting magnet steel, in described signal processing storehouse, be equiped with Hall switch and signal processing respectively
Circuit, wherein said Hall switch adapts with described signals collecting magnet steel.
In this sensor, only top, the whole Mechanical Contact face of described axially loaded magnetic suspension bearing
One point of pin, remaining each side, all in suspended state, is achieved that axially and transversely coefficient of friction connects
Being bordering on zero, that therefore whether cleans environment is less demanding, it is not necessary to lubrication, turbine just realizes zero
The magnetic suspension of power consumption.And exist certain between the rotary speed of turbine and the flow velocity measuring medium
Functional relationship, the curved relation of function between starting rotating speed and the critical speed of turbine, more than critical speed
Function is linear.Because the turbine in this sensor is suspended state, its critical speed and biography
The thimble structure of system bearing is compared and is substantially reduced, and therefore not only increases the measurement essence of sensor
Degree, its lower limit measured value is also remarkably decreased.It addition, when practice, signals collecting part
Correspondingly sized signal can be selected to adopt according to measuring the parameter such as duct size and flow measurement demand
Ji Cang and turbine, large diameter pipeline or open channel can use as plug-in type, use this sensor
Speed measuring function single-point or multimetering mean flow rate, substitute into cross-sectional area just can calculate stream
Amount.So, permanent magnetism magnetic suspension turbine rotor sensor applications is quite varied.
Further technical scheme is that described axially loaded magnetic suspension bearing includes being rotatably connected on
Shaft core on described centre frame, the outer wall of this shaft core has been arranged side by side the first internal magnetic ring,
Two internal magnetic rings, the outer sheath in described shaft core is provided with axle sleeve, and the free end of described shaft core is provided with position
Top on this shaft core centrage, described top stretch into described axle sleeve and acts against sleeve end
Center, described axle sleeve is provided with the most side by side and divides with described first internal magnetic ring, the second internal magnetic ring
Not the first outer magnetic ring of correspondence, the second outer magnetic ring.
The principle that this bearing repels mutually mainly by Magnet homopolarity.By relative for annular magnet homopolarity
Being fixed on shaft core and axle sleeve, a certain distance is stayed at identical the two poles of the earth, will obtain two magnetic pole sides
It is inside and outside radial magnet ring to identical and the magnetic line of force.When internal magnetic ring and the magnetic force center of outer magnetic ring
When line coincidence is zero, internal magnetic ring should revolve and be parked in outer magnetic ring, but this coincidence point simply theory
Upper existence, can not find this point in actual application.By adjust two magnet ring magnetic field centers it
Between distance, after having had a certain amount of offset distance, between shaft core and axle sleeve, be achieved that rotation
Stop.The least in allowed band bias internal distance, coefficient of friction is the least, and stability is the poorest；Skew
Distance is the biggest, and coefficient of friction is the biggest, and stability is the best.The whole machine of lateral stressed magnetic suspension bearing
Tool contact surface only has one point of thimble, remaining each side all in suspended state, be achieved that axially and
Side-friction coefficient is close to zero, and that therefore whether cleans environment is less demanding, it is not necessary to lubrication,
Turbine just realizes the magnetic suspension of zero-power.
Further technical scheme is that described axle sleeve leans described top one end and is provided with adjustable
The regulating part of described shaft core axial location, and this regulating part can be axle around the centrage of described shaft core
Rotate, the described top center acting against this regulating part.
By the axial location of regulating part regulation shaft core, and then regulate internal magnetic ring and outer magnetic ring magnetic force
Distance between centrage, the internal magnetic ring in shaft core can hover in the outer magnetic ring on axle sleeve.Gram
Having taken mechanical sensor and needed the defect of lubrication, the cleannes of internal medium require to be significantly lower than
Ball bearing, it is not necessary to lubricate and clean.
Further technical scheme is, described first internal magnetic ring, the second internal magnetic ring, the first outer magnetic
The homonymy of ring and the second outer magnetic ring is S level or N level.
Further technical scheme is, between described first internal magnetic ring, the second internal magnetic ring and institute
State and be equipped with soft iron ring between the first outer magnetic ring, the second outer magnetic ring.
Isolate at identical the two poles of the earth soft iron ring, slow down magnet ring demagnetization, thus ensure that this sensor
Can have longer service life.
Further technical scheme is that described top center is embedded with free to rotate and leans
Ball at described sleeve end center.
It is embedded ball so that act against rubbing between the ball on base and axle sleeve on top
Wiping power is minimum, close to zero.
The remarkable result of the present invention is: simple in construction, novel in design, uses permanent magnetism magnetic suspension skill
The turbine rotor sensor of art, whole Mechanical Contact face only has a top point, remaining position without
, there is not the frictional force produced because of contact in contact, turbine rotation is extremely flexible, the most not only carries
The high certainty of measurement of sensor, its lower limit measured value is also remarkably decreased；And overcome machinery
Formula sensor needs the defect of lubrication, and the cleannes of internal medium require significantly lower than ball axle
Holding, to measuring, environment cleannes are less demanding, it is not necessary to lubricate and clean, stable and reliable in work,
Use Maintenance free, manufacturing cost and use cost the highest for a long time, suitable for large-scale promotion.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of axially loaded magnetic suspension bearing described in Fig. 1.
Detailed description of the invention
Detailed description of the invention and operation principle to the present invention are made further below in conjunction with the accompanying drawings
Describe in detail.
As it is shown in figure 1, a kind of permanent magnetism magnetic suspension turbine sensing arrangement, including signals collecting storehouse 1
With the signal processing storehouse 2 being fixed on this signals collecting storehouse 1, in described signals collecting storehouse 1
It is fixed with axially loaded magnetic suspension bearing 4, in described axially loaded magnetic suspension by centre frame 3
Turbine 5 it is provided with, at this turbine 5 away from described axially loaded magnetic suspension on the outer wall of bearing 4
Signals collecting magnet steel 6 it is mounted on, in described signal processing storehouse 2 respectively on the end of bearing 4
It is equiped with Hall switch 7 and signal processing circuit 8, wherein said Hall switch 7 and described letter
Number gather magnet steel 6 adapt.
See accompanying drawing 2, described axially loaded magnetic suspension bearing 4 include being rotatably connected on described in
Shaft core 41 on heart frame 3, the outer wall of this shaft core 41 has been arranged side by side the first internal magnetic ring 42,
Second internal magnetic ring 43, the outer sheath in described shaft core 41 is provided with axle sleeve 44, described shaft core 41
Free end be provided with top 45 be positioned on this shaft core 41 centrage, described top 45 stretch into
Described axle sleeve 44 also acts against the center of axle sleeve 44 end, on described axle sleeve 44 the most side by side
Be provided with first outer magnetic ring 46 respectively the most corresponding with described first internal magnetic ring the 42, second internal magnetic ring 43,
Second outer magnetic ring 47.
As in figure 2 it is shown, described axle sleeve 44 leans described one end of top 45 is provided with adjustable institute
State the regulating part 48 of shaft core 41 axial location, and this regulating part 48 can be around described shaft core 41
Centrage is that axle rotates, and described top 45 act against the center of this regulating part 48, described top
The center of 45 is embedded with ball 410 that is free to rotate and that act against described axle sleeve 44 center.
In this example, described first internal magnetic ring the 42, second internal magnetic ring the 43, first outer magnetic ring 46 with
And second the homonymy of outer magnetic ring 47 be S level.
From Fig. 2 it can also be seen that between described first internal magnetic ring the 42, second internal magnetic ring 43
And it is equipped with soft iron ring 49 between described first outer magnetic ring the 46, second outer magnetic ring 47.
In the specific implementation, the homonymy of first internal magnetic ring the 42, second internal magnetic ring 43 be at the same level and
There is spacing, pole orientation is identical and the magnetic line of force is inside and outside radial magnet ring to form two, when
When internal magnetic ring overlaps with the magnetic field center of outer magnetic ring, internal magnetic ring should revolve and be parked in outer magnetic in theory
In ring, but this coincidence point simply exists in theory, can not find this point in actual application, because of
This regulates the axial location of shaft core 41 by regulating part 48, and then regulates internal magnetic ring and outer magnetic ring
Distance between magnetic field center, internal magnetic ring rotation when regulation is to suitable distance, in shaft core 41
It is parked in the outer magnetic ring on axle sleeve 44.Therefore, under the effect of turbine 5, axially loaded magnetic
Suspension bearing 4 cutoff signal gathers the magnetic field rotating formed between magnet steel 6, thus brings one group
Or the cutting magnetic field how group north and south replaces, excite Hall switch 7 to send switching signal, thus real
The collection of existing signal data.
Certain functional relationship is there is between rotary speed and the flow velocity measuring medium of turbine 5,
The curved relation of function between starting rotating speed and the critical speed of turbine, critical speed is with superior function linearly
Relation.Because turbine 5 is in suspended state, its critical speed is compared with the thimble structure of traditional bearing
Being substantially reduced, not only increase the certainty of measurement of sensor, its lower limit measured value is also remarkably decreased.
This collecting sensor signal part is according to measuring the ginseng such as duct size and flow measurement demand
Number selects correspondingly sized signals collecting storehouse 1 and turbine 5, and turbine 5 can be to survey air turbine and survey
Liquid turbine, can use as plug-in type in large diameter pipeline or open channel, use this sensor
Speed measuring function single-point or multimetering mean flow rate, substitute into cross-sectional area and just can calculate flow.
Therefore, this permanent magnetism magnetic suspension turbine rotor sensor applications is quite varied.
Claims (6)
1. a permanent magnetism magnetic suspension turbine sensing arrangement, it is characterised in that: include signals collecting
Storehouse (1) and the signal processing storehouse (2) being fixed on this signals collecting storehouse (1), described
It is fixed with axially loaded magnetic suspension bearing (4) by centre frame (3) in signals collecting storehouse (1),
The outer wall of described axially loaded magnetic suspension bearing (4) is provided with turbine (5), in this whirlpool
It is mounted on signal on wheel (5) end away from described axially loaded magnetic suspension bearing (4) to adopt
Collection magnet steel (6), be equiped with respectively in described signal processing storehouse (2) Hall switch (7) with
Signal processing circuit (8), wherein said Hall switch (7) and described signals collecting magnet steel (6)
Adapt.
Permanent magnetism magnetic suspension turbine sensing arrangement the most according to claim 1, its feature exists
In: described axially loaded magnetic suspension bearing (4) includes being rotatably connected on described centre frame (3)
On shaft core (41), the outer wall of this shaft core (41) has been arranged side by side the first internal magnetic ring (42),
Second internal magnetic ring (43), the outer sheath in described shaft core (41) is provided with axle sleeve (44), institute
The free end stating shaft core (41) is provided with top (45) being positioned on this shaft core (41) centrage,
Described top (45) are stretched into described axle sleeve (44) and act against the center of axle sleeve (44) end,
Described axle sleeve (44) is provided with the most side by side and described first internal magnetic ring (42), magnetic in second
Ring (43) first outer magnetic ring (46) of correspondence, the second outer magnetic ring (47) respectively.
Permanent magnetism magnetic suspension turbine sensing arrangement the most according to claim 2, its feature exists
In: described axle sleeve (44) leans the one end of described top (45) and is provided with shaft core described in adjustable
(41) regulating part (48) of axial location, and this regulating part (48) can be around described shaft core (41)
Centrage be axle rotate, described top (45) act against the center of this regulating part (48).
Permanent magnetism magnetic suspension turbine sensing arrangement the most according to claim 2, its feature exists
In: described first internal magnetic ring (42), the second internal magnetic ring (43), the first outer magnetic ring (46)
And second the homonymy of outer magnetic ring (47) be S level or N level.
5., according to the permanent magnetism magnetic suspension turbine sensing arrangement described in claim 2 or 4, it is special
Levy and be: between described first internal magnetic ring (42), the second internal magnetic ring (43) and described
It is equipped with soft iron ring (49) between one outer magnetic ring (46), the second outer magnetic ring (47).
6., according to the permanent magnetism magnetic suspension turbine sensing arrangement described in Claims 2 or 3, it is special
Levy and be: the center of described top (45) is embedded with free to rotate and acts against described axle sleeve
(44) ball (410) at center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610280304.7A CN105865540A (en) | 2016-04-28 | 2016-04-28 | Turbine sensor structure adopting permanent magnet maglev |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610280304.7A CN105865540A (en) | 2016-04-28 | 2016-04-28 | Turbine sensor structure adopting permanent magnet maglev |
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| Publication Number | Publication Date |
|---|---|
| CN105865540A true CN105865540A (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610280304.7A Pending CN105865540A (en) | 2016-04-28 | 2016-04-28 | Turbine sensor structure adopting permanent magnet maglev |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003014511A (en) * | 2001-07-03 | 2003-01-15 | Matsushita Electric Ind Co Ltd | Flow rate measuring apparatus |
| CN1405534A (en) * | 2001-10-09 | 2003-03-26 | 韩国科学技术研究院 | High-precision vortex flow meter using magnetic bearing |
| CN2630802Y (en) * | 2003-07-04 | 2004-08-04 | 天津大学 | Magnetic suspension wide-range turbine flow sensor |
| CN203177900U (en) * | 2013-02-19 | 2013-09-04 | 中国石油天然气股份有限公司 | Ball bearing type turbine flow meter |
| CN105158497A (en) * | 2015-09-10 | 2015-12-16 | 重庆市北碚区德宇仪表元件有限公司 | Magnetic suspension rotating speed sensor |
| CN205719116U (en) * | 2016-04-28 | 2016-11-23 | 重庆市北碚区德宇仪表元件有限公司 | Permanent magnetism magnetic suspension turbine sensor |
-
2016
- 2016-04-28 CN CN201610280304.7A patent/CN105865540A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003014511A (en) * | 2001-07-03 | 2003-01-15 | Matsushita Electric Ind Co Ltd | Flow rate measuring apparatus |
| CN1405534A (en) * | 2001-10-09 | 2003-03-26 | 韩国科学技术研究院 | High-precision vortex flow meter using magnetic bearing |
| CN2630802Y (en) * | 2003-07-04 | 2004-08-04 | 天津大学 | Magnetic suspension wide-range turbine flow sensor |
| CN203177900U (en) * | 2013-02-19 | 2013-09-04 | 中国石油天然气股份有限公司 | Ball bearing type turbine flow meter |
| CN105158497A (en) * | 2015-09-10 | 2015-12-16 | 重庆市北碚区德宇仪表元件有限公司 | Magnetic suspension rotating speed sensor |
| CN205719116U (en) * | 2016-04-28 | 2016-11-23 | 重庆市北碚区德宇仪表元件有限公司 | Permanent magnetism magnetic suspension turbine sensor |
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Application publication date: 20160817 |
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