CN110261638A - A kind of flange form liquid metal speed probe and rotating speed measurement method - Google Patents
A kind of flange form liquid metal speed probe and rotating speed measurement method Download PDFInfo
- Publication number
- CN110261638A CN110261638A CN201910453613.3A CN201910453613A CN110261638A CN 110261638 A CN110261638 A CN 110261638A CN 201910453613 A CN201910453613 A CN 201910453613A CN 110261638 A CN110261638 A CN 110261638A
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- speed
- rotor
- liquid metal
- tests
- flange
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- 229910001338 liquidmetal Inorganic materials 0.000 title claims abstract description 81
- 239000000523 sample Substances 0.000 title claims abstract description 51
- 238000000691 measurement method Methods 0.000 title claims abstract description 8
- 238000012360 testing method Methods 0.000 claims abstract description 133
- 230000006698 induction Effects 0.000 claims abstract description 48
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 238000009413 insulation Methods 0.000 claims abstract description 5
- 210000003746 feather Anatomy 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 238000013461 design Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 229910001128 Sn alloy Inorganic materials 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 241000083547 Columella Species 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 229910000846 In alloy Inorganic materials 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/26—Devices characterised by the use of fluids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a kind of flange form liquid metal speed probe and rotating speed measurement methods；The flange form liquid metal speed probe includes shell beam barrel, the rotor that tests the speed, end cover and the flange seal end cap of insulation；Shell beam barrel, which is sheathed on, to test the speed on rotor, and end cover and flange seal end cap are individually fixed in the shell beam barrel both ends opposite with the rotor axial that tests the speed, and to form the cavity that tests the speed of sealing, is stored with liquid metal in the cavity that tests the speed；It is provided with induction electrode on shell beam barrel, is provided with input electrode above the rotor that tests the speed；Induction electrode and input electrode immerse liquid metal, and are separately connected same tachometer circuit；When being tested the speed, electric current flows into liquid metal through the input electrode, and when input electrode and induction electrode are opposite in the same direction, sensed electrode exports a current pulse signal to tachometer circuit.And then effectively improve the safety and stability of flange form liquid metal speed probe.
Description
Technical field
The present invention relates to rotation-speed measuring device field more particularly to a kind of flange form liquid metal speed probe and
Rotating speed measurement method.
Background technique
Speed probe is a kind of sensor that the revolving speed of rotating object is converted to electricity output.The prior art it is main
It is tachometric survey to be carried out by directly transmitting rotary state, but this form causes velocity sensor to produce one to velocity measuring shaft
Quantitative load and resistance, this phenomenon are particularly evident in Mechatronic Systems.In addition the bearing shell of internal sensor is in charged state
Lower constantly friction, also easily generates heat, or even is also possible to generate electric spark after abrasion, seriously affects the performance of electric connector, and
Lead to the generation of peril.
Therefore, the prior art is defective, has much room for improvement and develops.
Summary of the invention
The technical problem to be solved in the present invention is that in view of the above-mentioned drawbacks in the prior art, providing a kind of flange form liquid
State metal speed probe and rotating speed measurement method, it is intended to solve the problems, such as that prior art speed probe stability is poor.
The technical proposal for solving the technical problem of the invention is as follows: a kind of flange form liquid metal speed probe,
For measuring object revolving speed comprising:
Shell beam barrel, the rotor that tests the speed, end cover and the flange seal end cap of insulation；
The shell beam barrel be sheathed on it is described test the speed on rotor, the end cover and flange seal end cap are individually fixed in described
The shell beam barrel both ends opposite with the rotor axial that tests the speed are stored with liquid in the cavity that tests the speed to form the cavity that tests the speed of sealing
State metal；
It is provided with induction electrode on the shell beam barrel, is provided with input electrode on the rotor that tests the speed；The induction electrode and
Input electrode immerses liquid metal, and is separately connected same tachometer circuit；
When being tested the speed, electric current flows into liquid metal through the input electrode, and in the input electrode and the induced electricity
When extremely opposite in the same direction, a current pulse signal is exported to tachometer circuit through the induction electrode.
Further, rotor adaptation one shaft of connection that tests the speed；The shaft is set as a rotating speed output shaft, or passes through
The velocity measuring shaft that shaft coupling is connect with rotating speed output shaft.
Further, the rotor that tests the speed is set as hollow cylindrical comprising one deviates from table in the rotor of shell beam barrel
Face, one end of the shaft are fixed in the rotor inner surface of the rotor that tests the speed.
Further, the flange form liquid metal speed probe further includes a key, and the rotor that tests the speed is close to sealing
A feather key keyway is opened up on the inner surface of one end of end cap, the key is slideably positioned in the feather key keyway, for fixing
State the shaft on rotor inner surface.
Further, the shell beam barrel includes the sleeve interior surface close to the rotor that tests the speed, the rotor that tests the speed
Further include one close to the shell beam barrel rotor outer surface；The induction electrode is set in the sleeve interior surface, described
Input electrode is set on the rotor outer surface, and the induction electrode and the coplanar setting of the input electrode.
Further, the ring flange towards the rotor is provided on the flange seal end cap, the ring flange is used for
The axially mounted shell beam barrel, test the speed rotor and shaft.
Further, the flange seal end cap and the end cover test the speed described in rotor face on, offer
Around the first seal groove of the shaft；The first gasket is provided in first seal groove.
Further, the flange seal end cap and the end cover test the speed described in rotor face on, be provided with
Around the sealing adjustment ring of the shaft.
Further, the flange seal end cap and end cover offer circular towards on the face of the shell beam barrel
Second seal groove of the shaft；The second gasket is provided in second seal groove.
It is as follows that the present invention solves another technical solution used by technical problem: a kind of rotating speed measurement method, for measuring
The revolving speed of object under test comprising: object under test revolving speed output end and described in any item flange form liquid metals as above are turned
The rotor connection of testing the speed of fast sensor；
After opening object under test, revolving speed R=N/ (m × T) of the object under test, wherein N is the electric current in period T
The current pulse signal number that detection circuit receives；M is the number of the input electrode.
Compared with prior art, the present invention provides a kind of flange form liquid metal speed probe and tachometric survey sides
Method；The flange form liquid metal speed probe includes: that shell beam barrel, the rotor that tests the speed, end cover and the flange of insulation are close
Sealing end lid；The shell beam barrel tests the speed on rotor described in being sheathed on, and the end cover and flange seal end cap are individually fixed in
The shell beam barrel both ends opposite with the rotor axial that tests the speed, to form the cavity that tests the speed of sealing, storage in the cavity that tests the speed
There is liquid metal；It is provided with induction electrode on the shell beam barrel, is provided with input electrode on the rotor that tests the speed；The induction
Electrode and input electrode immerse liquid metal, and are separately connected same tachometer circuit；When being tested the speed, described in the electric current warp
Input electrode flows into liquid metal, and when the input electrode and the induction electrode are opposite in the same direction, through the induction electrode
A current pulse signal is exported to tachometer circuit.And then it effectively prevents generating on flange form liquid metal speed probe negative
It carries, improves its safety and stability.
Detailed description of the invention
Fig. 1 be the present invention in flange form liquid metal speed probe stereoscopic schematic diagram.
Fig. 2 is the three-dimensional partial schematic sectional view of flange form liquid metal speed probe in the present invention.
Fig. 3 is the schematic side view of flange form liquid metal speed probe in the present invention.
Fig. 4 is I-I direction partial schematic sectional view in Fig. 3.
Fig. 5 is test the speed rotor and the sealing adjustment ring matching relationship of flange form liquid metal speed probe in the present invention
Three-dimensional partial schematic sectional view.
Fig. 6 be the velocity measuring shaft of flange form liquid metal speed probe in the present invention, test the speed rotor and sealing adjustment ring match
The three-dimensional partial schematic sectional view of conjunction relationship.
Fig. 7 is the beam barrel stereoscopic schematic diagram that tests the speed of flange form liquid metal speed probe in the present invention.
Fig. 8 is another three-dimensional partial schematic sectional view of flange form liquid metal speed probe in the present invention.
Description of symbols:
10, flange form liquid metal speed probe；11, shell beam barrel；12, test the speed rotor；13, end cover；14, flange is close
Sealing end lid；15, test the speed cavity；16, velocity measuring shaft；18, adjustment ring is sealed；111, induction electrode；112, beam barrel inner surface；121, defeated
Enter electrode；122, rotor inner surface；123, rotor outer surface；124, key；125, feather key keyway；141, ring flange；171, first
Seal groove；172, the second seal groove；173, the first gasket.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer and more explicit, right as follows in conjunction with drawings and embodiments
The present invention is further described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and do not have to
It is of the invention in limiting.
Fig. 1 and Fig. 2 are please referred to, the present invention provides a kind of flange form liquid metal speed probes 10, for measuring object
Body revolving speed, flange form liquid metal speed probe 10 include that shell beam barrel 11, the rotor 12 that tests the speed, end cover 13 and flange are close
Lid 14 is blocked, and the shell beam barrel 11, the rotor 12 that tests the speed, end cover 13 and flange seal end cap 14 are all insulator.Institute
State shell beam barrel 11 be sheathed on it is described test the speed on rotor 12, the end cover 13 and flange seal end cap 14 are individually fixed in institute
It states shell beam barrel 11 and tests the speed on the axially opposing both ends of rotor 12, to form the cavity 15 that tests the speed of sealing, the cavity that tests the speed
Liquid metal (not shown) is stored in 15.Further, the liquid metal includes gallium-indium alloy or gallium-indium-tin alloy；It can be with
Understand, the axial length of rotor 12 that tests the speed is less than or equal to the axial length of the shell beam barrel 11；The i.e. described enclosure axis
Cylinder 11 is concordant in the axially opposing both ends of rotor 12 of testing the speed or the axial both ends of rotor 12 of testing the speed are relatively described outer
11 indent of columella cylinder.
Please further combined with induction electrode 111 refering to Fig. 3 and Fig. 4, is provided on the shell beam barrel 11, described test the speed turns
Input electrode 121 is provided on son 12；Specifically, the shell beam barrel 11 is towards being provided with induced electricity on the face for testing the speed cavity 15
Pole 111, the face for testing the speed rotor 12 towards the cavity 15 that tests the speed are provided with input electrode 121；The i.e. described shell beam barrel 11 is close
Induction electrode 111 is provided on the face of the rotor 12 that tests the speed, the rotor 12 that tests the speed is set close to the face of the shell beam barrel 11
It is equipped with input electrode 121.
Further, the induction electrode 111 and input electrode 121 immerse liquid metal, and are separately connected same test the speed
Circuit.It is appreciated that the induction electrode 111 and input electrode 121 immerse the liquid metal simultaneously, and it is separately connected described
The both ends of tachometer circuit, when the induction electrode 111 and the input electrode 121 are with radial distribution, the liquid metal electricity
The induction electrode 111 and input electrode 121 is connected, i.e., the described liquid metal conducts tachometer circuit, it is emphasized that, institute
Stating tachometer circuit is existing design, mainly for detection of intermittent electric current, i.e., for detecting current pulse signal, about specific
Design is not inventive point of the invention, and the present invention is only used to apply, and details are not described herein.
Further, when being tested the speed, the electric current flows into liquid metal through the input electrode 121, and described
When input electrode 121 and the induction electrode 111 opposite in the same direction, through the induction electrode 111, and then current impulse letter is exported
Number to tachometer circuit.The i.e. described electric current enters liquid metal through input electrode 121, and if only if the input electrode 121 with
When the induction electrode 111 is opposite in the same direction, enter induction electrode 111 from the liquid metal, the tachometer circuit is connected, into
And detect a current pulse signal.And then realize flange form liquid metal speed probe in an unloaded situation
The revolving speed of the measurement object of the object under test is accurately measured, and has been obviously improved its stability and safety；Meanwhile also significantly
Improve the response speed of flange form liquid metal speed probe.
Please further combined with refering to Fig. 5 and Fig. 6, adaptation one shaft of connection of rotor 12 that tests the speed；The shaft is set as
Rotating speed output shaft, or the velocity measuring shaft 16 being connect by shaft coupling with rotating speed output shaft；It is appreciated that the rotor 12 that tests the speed can be with
It is directly connected to rotating speed output shaft, alternatively, the rotor 12 that tests the speed is directly connected to velocity measuring shaft 16, then the velocity measuring shaft 16 passes through connection
Axis device is fixedly connected with rotating speed output shaft.
Further, the rotor 12 that tests the speed is set as hollow cylindrical, has an internal diameter；It is described test the speed rotor 12 can
To be directly connected to the rotating speed output shaft.It should be noted that when the rotating speed output shaft is nonmagnetic, and the diameter of axle and the rotor
When internal diameter is adapted to；When the i.e. described rotating speed output shaft diameter of axle is adapted to the rotor internal diameter, the rotating speed output shaft can directly connect
Connect the rotor.
Further, the velocity measuring shaft 16 be fixed on it is described test the speed on rotor 12, the other end (is not schemed by a shaft coupling
Show) it is fixedly connected with the rotating speed output shaft；It is appreciated that the diameter of axle of rotating speed output shaft at this time can be less or greater than described
The internal diameter of rotor also can have certain weak magnetic；It should be noted that when the rotating speed output shaft is nonmagnetic, and axis
When diameter is adapted to 12 internal diameter of rotor that tests the speed, a velocity measuring shaft 16 can also be connected by a shaft coupling, and then realize to test the speed and turn
Son 12 is rotated synchronously with rotating speed output shaft.It should be noted that other not external loads of the rotor 12 that tests the speed, and then effectively
Flange form liquid metal speed probe internal friction fever is avoided, stability and safety are upgraded.
That is, the rotor that tests the speed in the present invention includes two kinds of situations when being adapted to shaft, regardless of which kind of mode, rotor
Fitting relation with shaft be all it is identical, the shaft in the present invention in following embodiments is only set as velocity measuring shaft 16 with shaft
Scheme is described, it should be understood that, when shaft is set as rotating speed output shaft, velocity measuring shaft 16 is also set as with shaft
It is identical, it is not repeating again；Further, the flange form liquid metal speed probe 10 in the present invention is except the rotor 12 that tests the speed
The matching relationship of other building blocks and shaft in addition, is similarly described with velocity measuring shaft 16；When shaft is set as revolving speed
When output shaft, when shaft is set as rotating speed output shaft, the flange form liquid metal speed probe 10 in the present invention, which removes, to test the speed
The matching relationship of other building blocks other than rotor 12 and shaft, it is identical to be also set as velocity measuring shaft 16 with shaft, does not exist again
It repeats.Please further combined with refering to Fig. 7, further, the rotor 12 that tests the speed includes one away from the shell beam barrel 11
Rotor inner surface 122, and the rotor outer surface 123 close to the shell beam barrel 11；One end of the shaft is fixed on described
It tests the speed in the rotor inner surface 122 of rotor 12, i.e., one end of the described velocity measuring shaft 16 or rotating speed output shaft is fixed on described test the speed and is turned
In the rotor inner surface 122 of son 12；The input electrode 121 is set on the rotor outer surface 123.Meanwhile institute's enclosure axis
Cylinder 11 includes the beam barrel inner surface 112 close to the rotor 12 that tests the speed, and the induction electrode 111 is set to table in the beam barrel
On face 112.It should be noted that the quantity of induction electrode 111 is set as one in the present invention, the number of the input electrode 121
Amount can be set to one or more；Meanwhile the induction electrode 111 and the coplanar setting of the input electrode 121, i.e., the described sense
Electrode 111 and the input electrode 121 is answered to be distributed in described test the speed on the same section of rotor 12 and shell beam barrel 11 radially.
And then guarantee that each input electrode 121 rotates one week with the rotor 12 that tests the speed, it all can be once with the induction electrode 111 with radial
The case where Relative distribution.
Meanwhile there is also certain resistance for the liquid metal, while when the rotor 12 that tests the speed rotates, liquid metal also can be with
Rotation, resistance can further increase；This results in longer-distance input electrode 121 and induction electrode 111, although also same
When immerse in liquid metal, but can not conduct；It is appreciated that and if only if the input electrode 121 and the induction
For electrode 111 with when being diametrically distributed, the spacing between the induction electrode 111 and input electrode 121 is minimum, and described at this time
Electric current in input electrode 121 can just enter the induction electrode 111 by liquid metal, and then generate current impulse letter
Number.
Preferably, the flange form liquid metal speed probe further includes a key 124, and the rotor 12 that tests the speed is close to close
It blocks and opens up a feather key keyway 125 on the inner surface of one end of lid 13, the key 124 is slideably positioned in the feather key keyway 125
In, the shaft for fixing on the rotor inner surface 122, the i.e. velocity measuring shaft 16 for fixing on the rotor inner surface 122
Or rotating speed output shaft.It is appreciated that the key 124 can be free to slide in the feather key keyway 125, and then facilitate the survey
Fast axis 16 or rotary output axis are mounted on described test the speed on rotor 12.
Further, the ring flange 141 for the rotor 12 that tests the speed described in is provided on the flange seal end cap 14, it is described
Ring flange 141 is for the axially mounted shell beam barrel 11, test rotor 12 and shaft, i.e., the described ring flange 141 is for axial
Install that the shell beam barrel 11, test the speed rotor 12, and for the fast velocity measuring shaft 16 of axially mounted institute or rotating speed output shaft.Specifically
, a ring flange 141 is extended to form towards the rotor on one end that the end cover 13 is contacted with the rotor；Described
When flange form liquid metal speed probe installs velocity measuring shaft 16, one end of the velocity measuring shaft 16 passes through the end cover 13,
Into the inner surface of the rotor 12 that tests the speed, be most pierced by the rotor 12 that tests the speed through ring flange 141 afterwards, and with the flange seal end cap
14 deviate from the face of the rotor 12 that tests the speed concordantly or protrude.When in flange form liquid metal speed probe installation revolving speed
It is identical when above-mentioned installation velocity measuring shaft 16 when output shaft, it is not repeating again.
Fig. 8 is please referred to, further, the flange seal end cap 14 and the end cover 13 test the speed towards described
On the face of rotor 12, the first seal groove 171 around the shaft is offered, that is, offers and is exported around velocity measuring shaft 16 or revolving speed
First seal groove 171 of axis, and the first gasket 173 is provided in first seal groove 171；It is appreciated that by setting
The first seal groove 171 and the first gasket 173 are set, can effectively avoid the liquid metal in the cavity 15 that tests the speed at rotor
It leaks；And then guarantee that the induction electrode 111 and input electrode 121 cannot immerse in liquid metal simultaneously, guarantee induction
Electrode 111 and input electrode 121 can be connected in time, improve flange form liquid metal speed probe measurement stability and safety
Property.
Further, the flange seal end cap 14 and the end cover 13 are towards the face of the rotor 12 that tests the speed
On, it is additionally provided with the sealing adjustment ring 18 around the shaft, that is, is additionally provided with around the velocity measuring shaft 16 or rotating speed output shaft
Sealing adjustment ring 18；The sealing adjustment ring 18 is O font, is sheathed on the end cover 13 and flange seal end cap 14
On, it is possible to prevente effectively from liquid metal leaks；And then guarantee that the induction electrode 111 and input electrode 121 cannot soak simultaneously
Enter in liquid metal, actual induction electrode 111 and input electrode 121 can be connected in time, improve flange form liquid metal revolving speed and pass
Sensor measures stability and safety.
Preferably, the flange seal end cap 14 and end cover 13 are offered towards on the face of the shell beam barrel 11
Around the second seal groove 172 of the shaft, that is, offer the second seal groove around the velocity measuring shaft 16 or rotating speed output shaft
172；The second gasket (not shown) is provided in second seal groove 172.And then it is close effectively to keep away face end cover 13, flange
It blocks lid 14 and liquid metal leakage occurs for 11 contact surface of shell beam barrel；The induction electrode 111 and input electrode is effectively ensured
121 cannot immerse in liquid metal simultaneously, guarantee that induction electrode 111 and input electrode 121 can be connected in time, improve flange form liquid
State metal speed probe measures stability and safety.
The present invention also provides a kind of rotating speed measurement methods, for measuring the revolving speed of object under test comprising:
The rotor that tests the speed of the object under test revolving speed output end flange form liquid metal speed probe above-mentioned with the present invention is connect；
After opening object under test, revolving speed R=N/ (m × T) of the object under test, wherein N is the electric current in period T
The current pulse signal number that detection circuit receives；M is the number of the input electrode.
It should be noted that the object under test revolving speed output end can be rotating speed output shaft, or connected by shaft coupling
The rotating speed output shaft and velocity measuring shaft connect；The object under test revolving speed output end and above-mentioned flange form liquid metal revolving speed of the invention
The rotor connection type that tests the speed of sensor includes: that the rotating speed output shaft is directly connected to test the speed rotor or the velocity measuring shaft
It is connect with the rotor that tests the speed, and the object under test rotary output axis to be measured is fixedly connected with by shaft coupling.
Based on flange form liquid metal speed probe provided by the invention, the present invention also provides the flange form liquid
The design method of metal speed probe comprising:
Step S11 selects the gallium indium of different proportion manufacture to close according to the temperature condition of use environment and the thermal diffusivity of sensor
Gold or gallium-indium-tin alloy, and sticky test is carried out in the case where testing circuit condition；
Step S12 designs velocity measuring shaft, key and the survey with input electrode according to the diameter of axle of rotating speed output shaft and tachometric survey demand
Fast rotor；
Step S13 designs the size for the cavity that tests the speed according to the sticky test experiments in step S11, and according to the width for the cavity that tests the speed
It spends with tachometric survey demand and designs the input electrode number m for the rotor that tests the speed；
Step S14 installs induction electrode in casing tube inner surface according to installation environment and position dimension designed enclosures beam barrel,
Thickness by sealing adjustment ring adjusts and the actually active gap for the cavity that tests the speed；
Step S15, according to the input electrode to test the speed on rotor test position corresponding with induction electrode, by key and with input electrode
The rotor that tests the speed be mounted on velocity measuring shaft.
Step S16 designs end cover and flange seal end cap according to enclosure axis cylinder size, close in end cover and flange
Sealing end covers the first seal groove of design and the second seal groove, and installs gasket in the first seal groove and the second seal groove；Together
When, sealing adjustment ring is arranged on end cover and flange seal end cap, and the liquid metal prepared is filled into the cavity that tests the speed
And test its anti-leak characteristic；
Step S17 needs to carry out energization test experiments after first assembly, guarantees the validity of assembly.
Compared with prior art, the present invention provides a kind of flange form liquid metal speed probe and tachometric survey sides
Method；The flange form liquid metal speed probe includes: that shell beam barrel, the rotor that tests the speed, end cover and the flange of insulation are close
Sealing end lid；The shell beam barrel tests the speed on rotor described in being sheathed on, and the end cover and flange seal end cap are individually fixed in
The shell beam barrel both ends opposite with the rotor axial that tests the speed, to form the cavity that tests the speed of sealing, storage in the cavity that tests the speed
There is liquid metal；It is provided with induction electrode on the shell beam barrel, is provided with input electrode on the rotor that tests the speed；The induction
Electrode and input electrode immerse liquid metal, and are separately connected same tachometer circuit；When being tested the speed, described in the electric current warp
Input electrode flows into liquid metal, and when the input electrode and the induction electrode are opposite in the same direction, through the induction electrode
A current pulse signal is exported to tachometer circuit.And then it effectively prevents generating on flange form liquid metal speed probe negative
It carries, improves its safety and stability.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.
Claims (10)
1. a kind of flange form liquid metal speed probe, for measuring object revolving speed characterized by comprising
Shell beam barrel, the rotor that tests the speed, end cover and the flange seal end cap of insulation；
The shell beam barrel be sheathed on it is described test the speed on rotor, the end cover and flange seal end cap are individually fixed in described
The shell beam barrel both ends opposite with the rotor axial that tests the speed are stored with liquid in the cavity that tests the speed to form the cavity that tests the speed of sealing
State metal；
It is provided with induction electrode on the shell beam barrel, is provided with input electrode on the rotor that tests the speed；The induction electrode and
Input electrode immerses liquid metal, and is separately connected same tachometer circuit；
When being tested the speed, electric current flows into liquid metal through the input electrode, and in the input electrode and the induced electricity
When extremely opposite in the same direction, a current pulse signal is exported to tachometer circuit through the induction electrode.
2. flange form liquid metal speed probe according to claim 1, which is characterized in that the rotor adaptation that tests the speed
Connect a shaft；The shaft is set as a rotating speed output shaft, or the velocity measuring shaft connecting by shaft coupling with rotating speed output shaft.
3. flange form liquid metal speed probe according to claim 2, which is characterized in that the rotor setting of testing the speed
For hollow cylindrical comprising one deviates from the rotor inner surface of shell beam barrel, and one end of the shaft is fixed on described test the speed and is turned
In the rotor inner surface of son.
4. flange form liquid metal speed probe according to claim 3, which is characterized in that the flange form liquid gold
Belonging to speed probe further includes a key, and the rotor that tests the speed opens up a feather key key on the inner surface of one end of end cover
Slot, the key are slideably positioned in the feather key keyway, the shaft for fixing on the rotor inner surface.
5. flange form liquid metal speed probe according to claim 1, which is characterized in that the shell beam barrel includes
Have a sleeve interior surface close to the rotor that tests the speed, the rotor that tests the speed further include one close to the shell beam barrel rotor appearance
Face；The induction electrode is set in the sleeve interior surface, and the input electrode is set on the rotor outer surface, and institute
State induction electrode and the coplanar setting of the input electrode.
6. flange form liquid metal speed probe according to claim 2, which is characterized in that the flange seal end cap
On be provided with the ring flange of rotor of testing the speed described in, the ring flange for the axially mounted shell beam barrel, test the speed rotor
And shaft.
7. flange form liquid metal speed probe according to claim 2, which is characterized in that the flange seal end cap
It is tested the speed described on the face of rotor with the end cover, offers the first seal groove around the shaft；Described first
The first gasket is provided in seal groove.
8. flange form liquid metal speed probe according to claim 2, which is characterized in that the flange seal end cap
It is tested the speed described on the face of rotor with the end cover, is provided with the sealing adjustment ring around the shaft.
9. flange form liquid metal speed probe according to claim 2, which is characterized in that the flange seal end cap
With end cover towards the second seal groove on the face of the shell beam barrel, offered around the shaft；Second sealing
The second gasket is provided in slot.
10. a kind of rotating speed measurement method, for measuring the revolving speed of object under test characterized by comprising
By object under test revolving speed output end and such as the described in any item flange form liquid metal speed probes of claim 1-9
The rotor that tests the speed connection；
After opening object under test, revolving speed R=N/ (m × T) of the object under test, wherein N is the electric current in period T
The current pulse signal number that detection circuit receives；M is the number of the input electrode.
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| CN201910453613.3A CN110261638B (en) | 2019-05-28 | 2019-05-28 | Flange type liquid metal rotating speed sensor and rotating speed measuring method |
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| CN110261638B (en) | 2024-04-02 |
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