CN205593500U - Axial displacement detection device and magnetic suspension bearing - Google Patents
Axial displacement detection device and magnetic suspension bearing Download PDFInfo
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- CN205593500U CN205593500U CN201521040704.8U CN201521040704U CN205593500U CN 205593500 U CN205593500 U CN 205593500U CN 201521040704 U CN201521040704 U CN 201521040704U CN 205593500 U CN205593500 U CN 205593500U
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Abstract
The utility model discloses an axial displacement detection device and magnetic suspension bearing relates to and measures technical field. The device includes: the first sensor for based on the first signal of telecommunication of radial displacement output of being surveyed the non - inclined plane of component, the second sensor for based on the radial displacement output second signal of telecommunication of being surveyed the component inclined plane, axial displacement calculating unit for according to the angle of inclination on the first signal of telecommunication, the second signal of telecommunication and quilt survey component inclined plane, calculate the axial displacement who is surveyed the component, wherein, the axial surface of being surveyed the component has inclined plane and non - inclined plane, and a sensor settings is being surveyed the non - inclined plane of component top, and the 2nd sensor settings is being surveyed component inclined plane top. Promptly the utility model discloses a set up the inclined plane, the radial displacement who surveys the component according to the quilt calculates axial displacement, has improved the precision that axial displacement detected.
Description
Technical field
This utility model relates to field of measuring technique, particularly relates to a kind of device for detecting axial displacement
And magnetic suspension bearing.
Background technology
In magnetic suspension bearing control system, axial displacement mainly has two kinds of detection methods.A kind of
Method is as it is shown in figure 1, overlap a detection dish 120 on axle 110, and axial sensor 130 is led to
Cross and measure the axially-movable of detection dish to determine the axial displacement of axle.The error brought due to assembling,
Detection dish and centrage 140 out of plumb of axle, so may result in axle axial in rotary course
Displacement has fluctuation, and detection dish is radius the best part on whole rotor, causes assemble flow
Relatively complicated；Another kind of method is as in figure 2 it is shown, displacement transducer 210 is just to rotor 220 axle
End 230 installation, it is applicable to most application scenario, but is not intended to some special applications
Occasion.The such as rotor of the equipment such as centrifugal water pump, cfentrifugal blower, its functional part is big
It is arranged on axle head more, and is cantilever design, now make displacement transducer due to reasons such as structures
Working rotor axial end is just installed by inconvenience, simultaneously in order to reduce rotor expanded by heating to function part
The impact of part position, sensor needs close proximity to functional part, and can not be arranged on rotor
Inoperative axle head.This detection method is unfavorable for axial sensor and the integrated place of radial transducer
Reason, increases structure axial space.It addition, because technique and assembling factor also bring along detection by mistake
Difference.
Utility model content
One to be solved in the utility model technical problem is that conventional axial displacement detecting precision not
High.
The present invention to solve the technical problem that the structure including rotor is complicated further, is not easy to peace
Dress, in the case of the axial limited space of rotating machinery, axially take up room big problem.
According to this utility model on the one hand, it is provided that a kind of device for detecting axial displacement, detected element
Axial surface there is inclined plane and non-inclined face, this device includes: first sensor, is used for
Radial displacement based on detected element non-inclined face exports first signal of telecommunication；Second sensor, uses
Second signal of telecommunication is exported in radial displacement based on detected element inclined plane；Axially displacement calculates single
Unit, is used for according to first signal of telecommunication, second signal of telecommunication and the inclination angle of detected element inclined plane,
Calculate the axial displacement of detected element；Wherein, first sensor is arranged on detected element non-inclined
Above face, the second sensor is arranged on above detected element inclined plane.
Further, first signal of telecommunication and second signal of telecommunication are voltage signal；Axially displacement calculates
Unit is for according to formulaCalculate the axial displacement of detected element；Wherein, Ur
It is first signal of telecommunication, UzBeing second signal of telecommunication, φ is the inclination angle of inclined plane, k1It it is the first sensing
The sensitivity parameter of device, k2It it is the sensitivity parameter of the second sensor.
Further, first sensor and the second sensor are arranged on probe ring, and first passes
The probe of sensor and the mounting distance of the probe of the second sensor are more than threshold value.
Further, first sensor and the second sensor are current vortex sensor.
Further, the probe of first sensor is all directed at probe ring with the probe of the second sensor
Circle central axis, and installation direction is consistent.
Further, the axial length of inclined plane is more than the maximum axial displacement of detected element.
Further, the inclination angle of detected element inclined plane is preset value.
Further, the inclination angle of detected element inclined plane is 0 °～90 °.
Further, detected element is the rotor of magnetic suspension bearing.
According to another aspect of the present utility model, also provide for a kind of magnetic suspension bearing, including: turn
Son, the axial surface of rotor is provided with inclined plane and non-inclined face.
Further, any of the above-described device for detecting axial displacement is also included.
Compared with prior art, the axial surface of this utility model detected element have inclined plane and
Non-inclined face, and be provided with at least two sensor in a device, one of them sensor based on
The radial displacement in detected element non-inclined face exports first signal of telecommunication, and another sensor is based on quilt
Survey organs incline face radial displacement export second signal of telecommunication, further according to first signal of telecommunication, second
The signal of telecommunication and the inclination angle of detected element inclined plane, calculate the axial displacement of detected element.The most logical
Cross and inclined plane is set, calculate axial displacement according to the radial displacement of detected element, improve axially
The precision of displacement detecting.
Further, the simple in construction of rotor, it is simple to install, in the axial limited space of rotating machinery
In the case of, it is possible to save part axial space.
By detailed description to exemplary embodiment of the present utility model referring to the drawings, this
The further feature of utility model and advantage thereof will be made apparent from.
Accompanying drawing explanation
The accompanying drawing of the part constituting description describes embodiment of the present utility model, and connects
It is used for together with description explaining principle of the present utility model.
Referring to the drawings, according to detailed description below, this practicality can be more clearly understood from new
Type, wherein:
Fig. 1 is the structural representation that prior art detects an embodiment of axial displacement.
Fig. 2 is the structural representation that prior art detects another embodiment of axial displacement.
Fig. 3 is the structural representation of an embodiment of this utility model device for detecting axial displacement
Figure.
Fig. 4 is sensor mounting location schematic diagram in one embodiment of this utility model.
Fig. 5 is the structural representation of another embodiment of this utility model device for detecting axial displacement
Figure.
Fig. 6 is that in one embodiment of this utility model, current vortex sensor detection magnetic suspension shaft is forwarded
The operation principle schematic diagram of sub-displacement.
Fig. 7 A is that in one embodiment of this utility model, device for detecting axial displacement operation principle is shown
It is intended to.
Fig. 7 B is that in one embodiment of this utility model, device for detecting axial displacement operation principle is put
Big schematic diagram.
Fig. 8 is the flow process signal of an embodiment of the axial displacement detecting method of this utility model
Figure.
Fig. 9 is that the flow process of a specific embodiment of the axial displacement detecting method of this utility model is shown
It is intended to.
Figure 10 is the structural representation of an embodiment of the rotor of this utility model magnetic suspension bearing
Figure.
Detailed description of the invention
Various exemplary embodiment of the present utility model is described in detail now with reference to accompanying drawing.Should
Note that unless specifically stated otherwise, the parts illustrated the most in these embodiments and step
Positioned opposite, numerical expression and numerical value be not intended to scope of the present utility model.
Simultaneously, it should be appreciated that for the ease of describing, the chi of the various piece shown in accompanying drawing
Very little is not to draw according to actual proportionate relationship.
Description only actually at least one exemplary embodiment is illustrative below, certainly
Not as to this utility model and application thereof or any restriction of use.
May not make in detail for technology, method and apparatus known to person of ordinary skill in the relevant
Thin discussion, but in the appropriate case, technology, method and apparatus should be considered to authorize description
A part.
Shown here with in all examples discussed, any occurrence should be construed as merely
Exemplary rather than conduct limits.Therefore, other example of exemplary embodiment can have
There is different values.
It should also be noted that similar label and letter expression similar terms in following accompanying drawing, therefore,
The most a certain Xiang Yi accompanying drawing is defined, then need not it is carried out in accompanying drawing subsequently
Discussed further.
For making the purpose of this utility model, technical scheme and advantage clearer, below tie
Close specific embodiment, and referring to the drawings, this utility model is further described.
Fig. 3 is the structural representation of an embodiment of this utility model device for detecting axial displacement
Figure.This utility model goes out an inclined plane in the Surface Machining of detected element 300 in advance, wherein
Detected element can be the rotor of bearing, and bearing is specifically as follows magnetic suspension bearing.Inclined plane can
Think the inclined plane of depression, it is also possible to for protruding inclined plane, with the inclined plane of depression be below
Example illustrates.It is provided above first sensor 311, for based on quilt in non-inclined face 310
The radial displacement surveying element non-inclined face exports first signal of telecommunication；It is provided above in inclined plane 320
Second sensor 321, exports the second telecommunications for radial displacement based on detected element inclined plane
Number；Wherein first signal of telecommunication, second signal of telecommunication can be voltage signal, first sensor and
Two sensings can be current vortex sensor.Axially displacement computing unit for according to first signal of telecommunication,
Second signal of telecommunication and the inclination angle of detected element inclined plane, calculate the axial displacement of detected element,
Wherein axially displacement computing unit marks the most in figure 3.
In one embodiment, the axial length L of the inclined plane of detected element is more than detected element
Maximum axial displacement Zmax, i.e. in detected element in moving process, measure inclined plane
Sensor is all the time in inclined plane axial length range.The inclination angle phi of detected element inclined plane is
Preset value, it is suitable to keep, and gradient is little, may cause the displacement sensitivity that sensor is measured
Low, gradient the most then causes range less than normal, and inclination angle can be such as 0 °～90 °, preferably model
Enclosing is 10 °～80 °, 30 °～60 °, can be such as 30 ° with value, 40 °, 43 °,
45°、48°、50°、55°、60°。
Fig. 4 is sensor mounting location schematic diagram in one embodiment of this utility model.This enforcement
In example, first sensor and the second sensing can be current vortex sensor, and installation site is Fig. 4
Shown in, 410 is the rotating shaft of bearing, and 420 is sensor probe ring, the probe of first sensor
430 and second probe 440 centrage of sensor be respectively aligned to the central principal axis of detected element.
The distance on the surface that probe distance measures rotating shaft not can exceed that the range of sensor, and first passes
The probe of sensor and the mounting distance of the probe of the second sensor are more than threshold value, it is to avoid two sensings
Interference is produced between device.
In embodiment of the present utility model, the axial surface tool of detected element of the present utility model
There are inclined plane and non-inclined face, and are provided with at least two sensor in a device, one of them
Sensor radial displacement based on detected element non-inclined face exports first signal of telecommunication, and another passes
Sensor radial displacement based on detected element inclined plane exports second signal of telecommunication, further according to the first electricity
Signal, second signal of telecommunication and the inclination angle of detected element inclined plane, calculate the axial of detected element
Displacement.I.e. calculate axial displacement according to the radial displacement of detected element, solve conventional axial position
Move the problem bringing detection error because of technique and assembling factor.It addition, this utility model is not because
Arranging detection dish, the most the end face at working shaft does not arranges sensor, is thus advantageous to sensor
Integrated approach, increases structure axial space, it is simple to install.
In another embodiment of the present utility model, the first current vortex sensor 510 is for base
Radial displacement in the non-inclined face of magnetic suspension bearing rotor exports the first voltage signal Ur.Second
Current vortex sensor 520 is for the radial displacement output of inclined plane based on magnetic suspension bearing rotor
Second voltage signal Uz.Axially displacement computing unit 530 is for according to formula
Calculate the axial displacement of magnetic suspension bearing rotor.Wherein, k1It it is the spirit of the first current vortex sensor
Sensitivity parameter, k2Being the sensitivity parameter of the second current vortex sensor, φ is the inclination angle of inclined plane.
The sensitivity of sensor can be adjusted by the slope of inclined plane.
Current vortex sensor detects the operation principle of magnetic suspension bearing rotor displacement as shown in Figure 6,
When probe coil 610 changes apart from distance x on detected body surface 620, can cause
The equiva lent impedance of coil changes, and utilizes measuring circuit the change of impedance can be changed into voltage
Signal U, and the different corresponding different voltage signals of displacement.
Such as, device for detecting axial displacement work during Fig. 7 A is one embodiment of this utility model
Principle schematic, Fig. 7 B is the enlarged drawing of encircled portion in Fig. 7 A, if magnetic suspension shaft is forwarded
The rotating shaft 710 of son is only axially producing displacement z, the then output of the first current vortex sensor 720
Will not change, now, the output voltage of the second current vortex sensor 730 is: Uz=k2X,
Wherein, x is the distance variable quantity of the second current vortex sensor 730 and inclined-plane, unit mm, Uz
Representing the output voltage of the second current vortex sensor 730, unit is V, k2It it is the second current vortex
The sensitivity parameter of sensor 730, unit V/mm.Rotor is axial as seen from Figure 7
The relation of displacement z Yu x is z=x/tan φ, the unit of z be mm, φ be the inclination angle of inclined plane.
If the rotating shaft of magnetic suspension bearing rotor 710 is radially also producing movement, the second current vortex passes
The exporting change of sensor 730 is the axial displacement by rotor and radial displacement superposition generation, now
It is accomplished by realizing the decoupling of axial displacement and radial displacement by the first current vortex sensor 720.
Second current vortex sensor 730 is output as: Uz=k2(x+y), y represents rotor non-inclined face
Radial displacement, if the sensitivity parameter of the first current vortex sensor 720 is k1, output voltage is:
Ur=k1y。
The most each formula is carried out simultaneous, it can be deduced that the rotating shaft of the magnetic suspension bearing rotor of rotor
The axial displacement of 710 is
If the rotating shaft of magnetic suspension bearing rotor 710 produces radial displacement,
Still set up, now haveAxially displacement is 0.
In embodiment of the present utility model, by first sensor based on magnetic suspension bearing rotor
The radial displacement in non-inclined face export the first voltage signal Ur, the second sensor is based on magnetic suspension
The radial displacement of the inclined plane of bearing rotor exports the second voltage signal Uz, and utilize according to formulaCalculate the axial displacement of magnetic suspension bearing rotor.Radial displacement can be utilized real
The now calculating of axially displacement.Further, conventional axial displacement is solved because of technique and assembling factor band
The problem detecting error.It addition, this utility model is because being not provided with detection dish, do not exist simultaneously
The end face of working shaft arranges sensor, is thus advantageous to sensor integrationization and processes, also simplify
The structure of rotor, it is simple to install.In the case of the axial limited space of rotating machinery, it is possible to joint
Save a part of space.
Fig. 8 is the flow process signal of an embodiment of the axial displacement detecting method of this utility model
Figure.
In step 810, receive first sensor radial displacement based on detected element non-inclined face
First signal of telecommunication of output.
In step 820, receive the radial displacement based on detected element inclined plane of the second sensor defeated
Second signal of telecommunication gone out.
Step 810 and step 820 can occur in the process of implementation simultaneously.First telecommunications therein
Number, second signal of telecommunication can be voltage signal, detected element can be the rotor of bearing, bearing
Can be magnetic suspension bearing, first sensor and the second sensor be current vortex sensor.
In step 830, according to first signal of telecommunication, second signal of telecommunication and detected element inclined plane
Inclination angle, calculates the axial displacement of detected element.
This utility model as it is shown on figure 3, in advance the Surface Machining in detected element 300 go out one
Inclined plane.Inclined plane can be the inclined plane of depression, it is also possible to for protruding inclined plane, below
Illustrate as a example by the inclined plane of depression.It is provided above first sensor in non-inclined face 310
311, it is provided above the second sensor 321 in inclined plane 320.The axle of the inclined plane of detected element
To length L more than maximum axial displacement Zmax of detected element, i.e. moving in detected element
During, measure the sensor of inclined plane all the time in inclined plane axial length range.Tested unit
The inclination angle phi of part inclined plane is preset value, and it is suitable to keep, and gradient is little, may cause passing
The displacement sensitivity that sensor is measured is low, and gradient the most then causes range less than normal, such as may be used in inclination angle
Thinking 0 °～90 °, preferably scope is 10 °～80 °, 30 °～60 °, such as can be with value
It it is 30 °, 40 °, 43 °, 45 °, 48 °, 50 °, 55 °, 60 °.
Fig. 4 is sensor mounting location schematic diagram in one embodiment of this utility model.This enforcement
In example, first sensor and the second sensing can be current vortex sensor, and installation site is Fig. 4
Shown in, 410 is the rotating shaft of bearing, and 420 is sensor probe ring, the probe of first sensor
430 and second probe 440 centrage of sensor be respectively aligned to the central principal axis of detected element.
The distance on the surface that probe distance measures rotating shaft not can exceed that the range of sensor, and first passes
The probe of sensor and the mounting distance of the probe of the second sensor are more than threshold value, it is to avoid two sensings
Interference is produced between device.
In embodiment of the present utility model, by arranging two sensors, one of them sensing
Device radial displacement based on detected element non-inclined face exports first signal of telecommunication, another sensor
Radial displacement based on detected element inclined plane exports second signal of telecommunication, further according to first signal of telecommunication,
Second signal of telecommunication and the inclination angle of detected element inclined plane, calculate the axial displacement of detected element.
I.e. calculate axial displacement according to the radial displacement of detected element, solve conventional axial displacement because of work
The problem that skill and assembling factor bring detection error.It addition, this utility model is because being not provided with inspection
Survey dish, the most the end face at working shaft does not arranges sensor, is thus advantageous to sensor integration
Process, increase structure axial space, it is simple to install.
Fig. 9 is that the flow process of a specific embodiment of the axial displacement detecting method of this utility model is shown
It is intended to.
In step 910, receive that the first current vortex sensor is based on magnetic suspension bearing rotor non-to incline
First voltage signal U of the radial displacement output on inclined-planer。
In step 920, receive the second current vortex sensor inclination based on magnetic suspension bearing rotor
Second voltage signal U of the radial displacement output in facez。
Step 910 and step 920 can occur in the process of implementation simultaneously.
In step 930, according to formulaCalculate the axial of magnetic suspension bearing rotor
Displacement.
Wherein, k1It is the sensitivity parameter of the first current vortex sensor, k2It is that the second current vortex passes
The sensitivity parameter of sensor, φ is the inclination angle of inclined plane.The sensitivity of sensor can be by inclining
The slope on inclined-plane is adjusted.
Current vortex sensor detects the operation principle of magnetic suspension bearing rotor displacement as shown in Figure 6,
When probe coil 610 changes apart from distance x on detected body surface 620, can cause
The equiva lent impedance of coil changes, and utilizes measuring circuit the change of impedance can be changed into voltage
Signal U, and the different corresponding different voltage signals of displacement.
Such as, device for detecting axial displacement work during Fig. 7 A is one embodiment of this utility model
Principle schematic, Fig. 7 B is the enlarged drawing of encircled portion in Fig. 7 A, if magnetic suspension shaft is forwarded
The rotating shaft 710 of son is only axially producing displacement z, the then output of the first current vortex sensor 720
Will not change, now, the output voltage of the second current vortex sensor 730 is: Uz=k2X,
Wherein, x is the distance variable quantity of the second current vortex sensor 730 and inclined-plane, unit mm, Uz
Representing the output voltage of the second current vortex sensor 730, unit is V, k2It it is the second current vortex
The sensitivity parameter of sensor 730, unit V/mm.Rotor is axial as seen from Figure 7
The relation of displacement z Yu x is z=x/tan φ, the unit of z be mm, φ be the inclination angle of inclined plane.
If the rotating shaft of magnetic suspension bearing rotor 710 is radially also producing movement, the second current vortex passes
The exporting change of sensor 730 is the axial displacement by rotor and radial displacement superposition generation, now
It is accomplished by realizing the decoupling of axial displacement and radial displacement by the first current vortex sensor 720.
Second current vortex sensor 730 is output as: Uz=k2(x+y), y represents rotor non-inclined face
Radial displacement, if the sensitivity parameter of the first current vortex sensor 720 is k1, output voltage is:
Ur=k1y。
The most each formula is carried out simultaneous, it can be deduced that the rotating shaft of the magnetic suspension bearing rotor of rotor
The axial displacement of 710 is
If the rotating shaft of magnetic suspension bearing rotor 710 produces radial displacement,
Still set up, now haveAxially displacement is 0.
In embodiment of the present utility model, by first sensor based on magnetic suspension bearing rotor
The radial displacement in non-inclined face export the first voltage signal Ur, the second sensor is based on magnetic suspension
The radial displacement of the inclined plane of bearing rotor exports the second voltage signal Uz, and utilize according to formulaCalculate the axial displacement of magnetic suspension bearing rotor.Radial displacement can be utilized real
The now calculating of axially displacement.Further, conventional axial displacement is solved because of technique and assembling factor band
The problem detecting error.It addition, this utility model is because being not provided with detection dish, do not exist simultaneously
The end face of working shaft arranges sensor, is thus advantageous to sensor integrationization and processes, also simplify
The structure of rotor, it is simple to install.In the case of the axial limited space of rotating machinery, it is possible to joint
Save a part of space.
Figure 10 is the structural representation of an embodiment of the rotor of this utility model magnetic suspension bearing
Figure.
1010 is the inclined plane of the rotor of magnetic suspension bearing, and 1020 is the rotor of magnetic suspension bearing
Non-inclined face, 1030 is the rotating shaft of the rotor of magnetic suspension bearing.Inclined plane can be depression
Inclined plane, it is also possible to for protruding inclined plane.In one embodiment, magnetic suspension bearing rotor
The axial length L of inclined plane more than the maximum axial displacement of magnetic suspension bearing rotor.Inclined plane
Inclination angle phi be preset value, it is suitable to keep, and inclination angle can be such as 0 °～90 °, excellent
Selecting scope is 10 °～80 °, 30 °～60 °, can be such as 30 ° with value, 40 °, 43 °,
45°、48°、50°、55°、60°。
In one embodiment, magnetic suspension bearing of the present utility model also includes axial displacement detecting
Device.Wherein, device for detecting axial displacement has been described in detail in the various embodiments described above,
The most no longer it is expanded on further.
In this embodiment, the axial surface of magnetic suspension bearing rotor arranges inclined plane.?
When carrying out axial displacement detecting, it is only necessary to two sensors, one of them sensor detection non-inclined
The radial displacement output signal of telecommunication in face, the radial displacement output of another sensor detection inclined plane
The signal of telecommunication, further according to two signals of telecommunication and the inclination angle of inclined plane, calculates turning of magnetic suspension bearing
The axial displacement of son.Simplify the structure of rotor, solve conventional axial displacement because of technique and dress
Join the problem that factor brings detection error.It addition, this utility model is when detecting axial displacement,
Being not provided with detection dish, the most the end face at working shaft does not arranges sensor, is thus advantageous to sensing
Device integrated approach, increases structure axial space, it is simple to install.
So far, this utility model is described in detail.Of the present utility model in order to avoid covering
Design, does not describe details more known in the field.Those skilled in the art are according to above
Description, completely it can be appreciated how implement technical scheme disclosed herein.
Although specific embodiments more of the present utility model having been carried out in detail by example
Illustrate, but it should be appreciated by those skilled in the art, above example merely to illustrate,
Rather than in order to limit scope of the present utility model.It should be appreciated by those skilled in the art, can
In the case of without departing from scope and spirit of the present utility model, above example is modified.
Scope of the present utility model is defined by the following claims.
Claims (11)
1. a device for detecting axial displacement, it is characterised in that the axial surface of detected element has inclined plane and non-inclined face, described device includes:
First sensor, exports first signal of telecommunication for radial displacement based on described detected element non-inclined face；
Second sensor, exports second signal of telecommunication for radial displacement based on described detected element inclined plane；
Axially displacement computing unit, for according to described first signal of telecommunication, described second signal of telecommunication and the inclination angle of described detected element inclined plane, calculates the axial displacement of described detected element；
Wherein, described first sensor is arranged on above described detected element non-inclined face, and described second sensor is arranged on above described detected element inclined plane.
Device the most according to claim 1, it is characterised in that described first signal of telecommunication and described second signal of telecommunication are voltage signal；
Described axial displacement computing unit is for according to formulaCalculate the axial displacement of described detected element；
Wherein, UrFor described first signal of telecommunication, UzFor described second signal of telecommunication, φ is the inclination angle of described inclined plane, k1For the sensitivity parameter of described first sensor, k2Sensitivity parameter for described second sensor.
Device the most according to claim 1 and 2, it is characterised in that described first sensor and described second sensor are arranged on probe ring, and the mounting distance of the probe of the probe of described first sensor and described second sensor is more than threshold value.
Device the most according to claim 1 and 2, it is characterised in that the probe of described first sensor is all directed at the circle central axis of probe ring with the probe of the second sensor, and installation direction is consistent.
Device the most according to claim 1 and 2, it is characterised in that the axial length of described inclined plane is more than the maximum axial displacement of described detected element.
Device the most according to claim 1 and 2, it is characterised in that the inclination angle of described detected element inclined plane is preset value.
Device the most according to claim 6, it is characterised in that the inclination angle of described detected element inclined plane is 0 °～90 °.
Device the most according to claim 1 and 2, it is characterised in that described detected element is the rotor of magnetic suspension bearing；
Or
Described first sensor and the second sensor are current vortex sensor.
9. a magnetic suspension bearing, it is characterised in that including:
Detected element；The axial surface of wherein said detected element is provided with inclined plane and non-inclined face, and wherein said detected element is rotor.
10. a magnetic suspension bearing, it is characterised in that also include the device for detecting axial displacement as described in claim 1-8 is arbitrary.
11. magnetic suspension bearings according to claim 10, it is characterised in that also include:
Rotor, wherein, the axial surface of described rotor is provided with inclined plane and non-inclined face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521040704.8U CN205593500U (en) | 2015-12-14 | 2015-12-14 | Axial displacement detection device and magnetic suspension bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521040704.8U CN205593500U (en) | 2015-12-14 | 2015-12-14 | Axial displacement detection device and magnetic suspension bearing |
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| Publication Number | Publication Date |
|---|---|
| CN205593500U true CN205593500U (en) | 2016-09-21 |
Family
ID=56927311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521040704.8U Withdrawn - After Issue CN205593500U (en) | 2015-12-14 | 2015-12-14 | Axial displacement detection device and magnetic suspension bearing |
Country Status (1)
| Country | Link |
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| CN (1) | CN205593500U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109470192A (en) * | 2018-12-18 | 2019-03-15 | 南京磁谷科技有限公司 | A kind of mounting structure of electromagnetic bearing axial sensor |
| CN113719541A (en) * | 2021-09-29 | 2021-11-30 | 珠海格力电器股份有限公司 | Axial position detection method, device, unit and storage medium for magnetic suspension bearing |
-
2015
- 2015-12-14 CN CN201521040704.8U patent/CN205593500U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105352466B (en) * | 2015-12-14 | 2018-03-20 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of device for detecting axial displacement, method and magnetic suspension bearing |
| CN109470192A (en) * | 2018-12-18 | 2019-03-15 | 南京磁谷科技有限公司 | A kind of mounting structure of electromagnetic bearing axial sensor |
| CN113719541A (en) * | 2021-09-29 | 2021-11-30 | 珠海格力电器股份有限公司 | Axial position detection method, device, unit and storage medium for magnetic suspension bearing |
| CN113719541B (en) * | 2021-09-29 | 2022-05-10 | 珠海格力电器股份有限公司 | Axial position detection method, device, unit and storage medium for magnetic suspension bearing |
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