CN107939813A - The method that shaft and countershaft carry out axial displacement detection - Google Patents
The method that shaft and countershaft carry out axial displacement detection Download PDFInfo
- Publication number
- CN107939813A CN107939813A CN201610895344.2A CN201610895344A CN107939813A CN 107939813 A CN107939813 A CN 107939813A CN 201610895344 A CN201610895344 A CN 201610895344A CN 107939813 A CN107939813 A CN 107939813A
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- China
- Prior art keywords
- sensor
- shaft
- output
- axial
- slope
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/02—Shafts; Axles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The present invention provides a kind of method that shaft and countershaft carry out axial displacement detection, wherein, which is provided with slope, the location settings sensor on slope described in face.The present invention in shaft by setting a slope, and in the location settings sensor on face slope, so as to realize the accurate measurement of countershaft axial displacement, because which eliminates axial detection faces, so as to avoid because the problem of axial displacement test result caused by detection faces processing and installation accuracy difference is impacted, the precision of axial testing result is effectively improved.
Description
Technical field
The present invention relates to mechanical equipment technical field, and axial displacement is carried out in particular to a kind of shaft and countershaft
The method of detection.
Background technology
At present, during the axial displacement test of slewing (equipment for especially applying magnetic suspension bearing),
The setting of shaft position sensor will not only meet simple possible in structure, it is also necessary to ensure the accuracy of displacement detecting.Currently,
The mode of most of detection axial displacements is to arrange one or more probe in the axial direction, and an axis is set before probe
To detection faces, the axial displacement of shaft is determined with the distances of axial detection faces by detected by axial probe.
However, this mode is primarily present problems with：
1) if axial detection faces are because processing either installation error tilts, then axis in rotary course, its
Axial displacement will change during control, and according to the control logic of magnetic levitation bearing system, axial displacement will not
Adjust disconnectedly, play will be produced so that axial, influence axial control, unstability serious or even that system can be directly resulted in,
There is very big influence to the reliability of system；
2) tested for the axial displacement of wide range, larger inductive probe need to be used, volume is bigger.
In view of the above-mentioned problems, not yet propose effective solution at present.
The content of the invention
An embodiment of the present invention provides a kind of shaft, and for accurately measuring the axial displacement of shaft, which is provided with tiltedly
Slope, the location settings sensor on slope described in face.
In one embodiment, a sensor is set in the shaft, or is symmetrical arranged two or more
Sensor.
In one embodiment, the type of the sensor of symmetric position is identical.
In one embodiment, the sensor includes at least one of：Electromagnetic induction sensor, laser sensor
And magneto strictive sensor.
In one embodiment, the electromagnetic induction sensor includes at least one of：Eddy current displacement sensor
And inductance sensor.
In one embodiment, the angle on the slope is calculated by equation below：
Tan a=(x-t)/s
Wherein, s represents axial movement distance, and x represents the maximum distance of reaction of sensor distance metal shaft, and t is represented
The safe distance of sensor distance shaft.
In one embodiment, the angle on the slope is adjustable.
The embodiment of the present invention additionally provides a kind of method that axial displacement detection is carried out to above-mentioned shaft, and this method includes：
Obtain the output of sensor；
According to the correspondence between default output and axial internal clearance, the axial displacement of the shaft is determined.
In one embodiment, according to the correspondence between default output and axial internal clearance, institute is determined
Before the axial displacement for stating shaft, further include：
Correspondence between the sensor output and axial internal clearance is tested out by calibrator (-ter) unit；
The correspondence that will be tested out, as the correspondence between the default output and axial internal clearance.
In one embodiment, in the case where the quantity of the sensor is 2, obtaining the output of sensor includes：
Obtain the output of first sensor and the output of second sensor；
The output of the first sensor is subtracted into the output of the second sensor as the output obtained.
In the above-described embodiments, a slope is set in shaft, and in the location settings sensor on face slope, so as to
To realize the accurate measurement of countershaft axial displacement, because which eliminates axial detection faces, so as to avoid because detection faces
The problem of axial displacement test result caused by processing and installation accuracy difference is impacted, is effectively improved axial testing result
Precision.
Meanwhile by adjusting the angle on shaft slope, it is possible to achieve small-range probe tests larger axial displacement, example
Such as：A certain displacement sensor along sensor axis to useful range be x, its test safe distance be t, therefore, its useful range
For x-t, in embodiments of the present invention, s=(x-t)/tan a, as long as setting ramp angles to be less than 45 degree, you can realize s >=x-
T, so as to realize that small-range probe tests the purpose of larger axial displacement.
Brief description of the drawings
The attached drawing for forming the part of the application is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its explanation is used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structure diagram of shaft according to embodiments of the present invention；
Fig. 2 is the method flow diagram of axial displacement detection method according to embodiments of the present invention；
Fig. 3 is axial test philosophy figure according to embodiments of the present invention；
Fig. 4 is that ramp angles according to embodiments of the present invention calculate schematic diagram；
Fig. 5 is differential output schematic diagram according to embodiments of the present invention.
Embodiment
It is right with reference to embodiment and attached drawing for the object, technical solutions and advantages of the present invention are more clearly understood
The present invention is described in further details.Here, the exemplary embodiment and its explanation of the present invention are used to explain the present invention, but simultaneously
It is not as a limitation of the invention.
Inventor considers whether that axial detection faces can be cancelled, so as to evade the processing of detection surface parts and installation accuracy is poor
Influence to axial test result, discovery can set a slope in shaft, then in the position cloth on positive countershaft slope
Put one or more sensor, when being moved using slope, sensor correspond to the equivalent induction area on shaft slope with it is equivalent away from
From changed principle, axial displacement is tested out.
The shaft provided as shown in Figure 1 for this example, is provided with slope, the location settings sensor on slope described in face.
When actually realizing, a probe can be set on slope, can also symmetric position setting two or two
Sensor more than a.When probe is arranged symmetrically, different types of probe can be arranged.Further, in order to eliminate
Temperature drift, specifically can arrange probe type, probe in the probe of symmetric position arrangement same type using which kind of mode
Quantity, the application is not construed as limiting, and according to actual conditions and can need to select.
The sensor can include but is not limited at least one of：Electromagnetic induction sensor, laser sensor and magnetic
Cause telescoping sensor.Wherein, electromagnetic induction sensor can include but is not limited at least one of：Eddy current displacement sensor
And inductance sensor.
It is important to note, however, that the type of above-mentioned cited sensor is only a kind of schematic description, can also select
Other types of sensor is selected, the type for the sensor specifically selected, the application is not construed as limiting.
Because being provided that slope, therefore different ramp angles can be set according to the difference of the range of required measurement
Degree, to realize based on measurement of the sensor to different ranges.Wherein, the angle on slope can be calculated by equation below：
Tan a=(x-t)/s
Wherein, s represents axial movement distance, and x represents the maximum distance of reaction of sensor distance metal shaft, and t is represented
The safe distance of sensor distance shaft.
That is, in order to realize the measurement to different ranges, the angle that can set slope is adjustable.
Based on above-mentioned shaft, a kind of method that countershaft carries out axial displacement detection is additionally provided in this example, such as Fig. 2 institutes
Show, may comprise steps of：
Step 201：Obtain the output of sensor；
Step 202：According to the correspondence between default output and axial internal clearance, the axial direction of the shaft is determined
Displacement.
Above-mentioned default correspondence can be established in the following way：The biography is tested out by calibrator (-ter) unit
Sensor exports the correspondence between axial internal clearance；The correspondence that will be tested out, as the default output and axis
To the correspondence between amount of movement.
If the quantity of the sensor is symmetrically arranged two sensors, then the output of sensor is obtained, can be with
It is the output for the output and second sensor for obtaining first sensor；The output of first sensor is subtracted into the defeated of second sensor
Go out the output as acquisition.
The method measured with reference to a specific embodiment to the axial displacement of above-mentioned shaft and countershaft is said
It is bright, it should be noted, however, that the specific embodiment merely to the present invention is better described, is not formed to the present invention's
Improper restriction.
In order to realize the accurate measurement of shaft axial displacement, while solve a series of of existing shaft axial displacement test
Problem, propose in this example it is a kind of based on slope sensing shaft axial displacement test method, influence sensor output because
Element mainly has：
1) the distance x of sensor distance detection faces；
2) effective area of detection ρ that sensor can sense.
The output of sensor can be expressed as：
U=f (x)+f (ρ)
In the case of being remained unchanged in the position of sensor, the distance x of sensor distance detection faces or effective detection faces
When product ρ changes, its sensor output U can change immediately.
In this example, as shown in figure 3, by setting a slope in shaft, make at the probe face slope, work as shaft
When moving axially y, shaft upslope can also move in the axial direction y, and effective the area of detection ρ and center probe of sensor are apart from quilt
Surveying the effective distance x of axis can also change immediately, and output U can naturally also change immediately, be tested out by calibrator (-ter) unit
Correspondence between sensor output U and shaft axial internal clearance y, can complete the measurement of axial displacement；
As shown in figure 4, if axial movement distance were s (that is, the distances of above-mentioned sensor distance detection faces), detection faces
Sensor maximum range when product is constant is x, sensor distance shaft safe distance t, then ramp angles a can be by following public
Formula calculates：
Tan a=(x-t)/s
By adjusting ramp angles, it is possible to achieve same probe tests different axial range, if by ramp angles tune
It is small, then can to realize the effect of small probe test wide range.
Above-mentioned sensor can include but is not limited at least one of：Electromagnetic induction sensor (such as：Current vortex position
Displacement sensor, inductance sensor etc.), laser sensor, magneto strictive sensor etc..
It is the explanation carried out by taking a sensor as an example in upper example, can be with as shown in figure 5, oblique when actually realizing
Slope symmetric position arranges two or more sensors, forms the mode of differential output, and sensor output is indicated as：
U=Ua-Ub
The influence that the adverse circumstances such as temperature export sensor can be effectively reduced by way of differential output, to improve
The adaptive capacity to environment and induction sensitivity of sensor.
Influence of the detection faces precision to axially testing effectively is evaded in the embodiment of the present invention, by adjusting shaft ramp angle
Degree, it is possible to realize that same probe tests the purpose of different axial displacements.
It can be seen from the above description that the embodiment of the present invention realizes following technique effect：One is set in shaft
Slope, and in the location settings sensor on face slope, so as to realize the accurate measurement of countershaft axial displacement, because of the party
Formula eliminates axial detection faces, so as to avoid because axial displacement test knot caused by detection faces processing and installation accuracy difference
The problem of fruit is impacted, is effectively improved the precision of axial testing result.
Obviously, those skilled in the art should be understood that each module of the above-mentioned embodiment of the present invention or each step can be with
Realized with general computing device, they can be concentrated on single computing device, or are distributed in multiple computing devices
On the network formed, alternatively, they can be realized with the program code that computing device can perform, it is thus possible to by it
Store and performed in the storage device by computing device, and in some cases, can be to be held different from order herein
They, are either fabricated to each integrated circuit modules or will be multiple in them by the shown or described step of row respectively
Module or step are fabricated to single integrated circuit module to realize.In this way, the embodiment of the present invention be not restricted to it is any specific hard
Part and software combine.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this area
For art personnel, the embodiment of the present invention can have various modifications and variations.Within the spirit and principles of the invention, made
Any modification, equivalent substitution, improvement and etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of shaft, it is characterised in that be provided with slope, the location settings sensor on slope described in face.
2. shaft according to claim 1 a, it is characterised in that sensor is set in the shaft, or is symmetrically set
Put two or more sensors.
3. shaft according to claim 2, it is characterised in that the type of the sensor of symmetric position is identical.
4. shaft according to any one of claim 1 to 3, it is characterised in that the sensor include it is following at least it
One：Electromagnetic induction sensor, laser sensor and magneto strictive sensor.
5. shaft according to claim 4, it is characterised in that the electromagnetic induction sensor includes at least one of：
Eddy current displacement sensor and inductance sensor.
6. shaft according to claim 1, it is characterised in that the angle on the slope is calculated by equation below：
Tana=(x-t)/s
Wherein, s represents axial movement distance, and x represents the maximum distance of reaction of sensor distance metal shaft, and t represents sensing
Safe distance of the device apart from shaft.
7. shaft according to claim 1, it is characterised in that the angle on the slope is adjustable.
8. a kind of method that shaft to any one of claim 1 to 7 carries out axial displacement detection, it is characterised in that
Including：
Obtain the output of sensor；
According to the correspondence between default output and axial internal clearance, the axial displacement of the shaft is determined.
9. according to the method described in claim 8, it is characterized in that, according to pair between default output and axial internal clearance
It should be related to, before the axial displacement for determining the shaft, further include：
Correspondence between the sensor output and axial internal clearance is tested out by calibrator (-ter) unit；
The correspondence that will be tested out, as the correspondence between the default output and axial internal clearance.
10. according to the method described in claim 8, it is characterized in that, in the case where the quantity of the sensor is 2, obtain
The output of sensor includes：
Obtain the output of first sensor and the output of second sensor；
The output of the first sensor is subtracted into the output of the second sensor as the output obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610895344.2A CN107939813A (en) | 2016-10-13 | 2016-10-13 | The method that shaft and countershaft carry out axial displacement detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610895344.2A CN107939813A (en) | 2016-10-13 | 2016-10-13 | The method that shaft and countershaft carry out axial displacement detection |
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| Publication Number | Publication Date |
|---|---|
| CN107939813A true CN107939813A (en) | 2018-04-20 |
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ID=61928512
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610895344.2A Pending CN107939813A (en) | 2016-10-13 | 2016-10-13 | The method that shaft and countershaft carry out axial displacement detection |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307789A (en) * | 2019-07-19 | 2019-10-08 | 哈尔滨工业大学 | One kind being based on maglev float circumferential direction angular displacement controllable device |
| CN111288945A (en) * | 2020-04-01 | 2020-06-16 | 玉溪合创科技有限公司 | Device for detecting displacement change of fixed rotary cylinder equipment |
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| CN1544878A (en) * | 2003-11-14 | 2004-11-10 | 清华大学 | Method for measuring axial displacement of electromagnet bearing rotor |
| CN202599326U (en) * | 2012-04-05 | 2012-12-12 | 黑龙江龙煤矿业集团股份有限公司双鸭山分公司虹焱热电有限公司 | Axial displacement monitor protective device of front small shaft of steam turbine |
| US20130113469A1 (en) * | 2010-04-30 | 2013-05-09 | Continental Automotive Gmbh | Magnetic length measuring system, length measuring method and method for producing a magnetic length measuring system |
| CN105352466A (en) * | 2015-12-14 | 2016-02-24 | 珠海格力节能环保制冷技术研究中心有限公司 | Axial displacement detection device and method and magnetic suspension bearing |
| CN205300548U (en) * | 2016-01-12 | 2016-06-08 | 天津飞旋科技研发有限公司 | Rotor axial displacement detecting system |
-
2016
- 2016-10-13 CN CN201610895344.2A patent/CN107939813A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1544878A (en) * | 2003-11-14 | 2004-11-10 | 清华大学 | Method for measuring axial displacement of electromagnet bearing rotor |
| US20130113469A1 (en) * | 2010-04-30 | 2013-05-09 | Continental Automotive Gmbh | Magnetic length measuring system, length measuring method and method for producing a magnetic length measuring system |
| CN202599326U (en) * | 2012-04-05 | 2012-12-12 | 黑龙江龙煤矿业集团股份有限公司双鸭山分公司虹焱热电有限公司 | Axial displacement monitor protective device of front small shaft of steam turbine |
| CN105352466A (en) * | 2015-12-14 | 2016-02-24 | 珠海格力节能环保制冷技术研究中心有限公司 | Axial displacement detection device and method and magnetic suspension bearing |
| CN205300548U (en) * | 2016-01-12 | 2016-06-08 | 天津飞旋科技研发有限公司 | Rotor axial displacement detecting system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307789A (en) * | 2019-07-19 | 2019-10-08 | 哈尔滨工业大学 | One kind being based on maglev float circumferential direction angular displacement controllable device |
| CN110307789B (en) * | 2019-07-19 | 2021-09-07 | 哈尔滨工业大学 | Magnetic suspension-based floater circumferential angular displacement controllable device |
| CN111288945A (en) * | 2020-04-01 | 2020-06-16 | 玉溪合创科技有限公司 | Device for detecting displacement change of fixed rotary cylinder equipment |
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Application publication date: 20180420 |