CN108918651A - Bearing inner race rolling contact fatigue non-destructive testing device and production method - Google Patents
Bearing inner race rolling contact fatigue non-destructive testing device and production method Download PDFInfo
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- CN108918651A CN108918651A CN201810336609.4A CN201810336609A CN108918651A CN 108918651 A CN108918651 A CN 108918651A CN 201810336609 A CN201810336609 A CN 201810336609A CN 108918651 A CN108918651 A CN 108918651A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Rolling Contact Bearings (AREA)
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Abstract
The invention discloses the non-destructive testing device and production method of a kind of bearing inner race rolling contact fatigue, which includes detection sensor, detection platform and signal processing link, and detection sensor includes excitation coil, induction coil and FERRITE CORE；Detection platform includes pedestal, rotating electric machine, sensor holder, bearing inner race support frame, support frame baffle；Signal processing link includes Direct Digital Synthesizer, embedded system controller, power amplifier, data collecting card；The extraction harness of data collecting card is connected with external signal processing system.Compared with prior art, the present invention is using the difference value of two paths of signals as detection foundation, avoid existing Lift-off effect in the detection process, accurate detection result is provided to judge the service condition of bearing, the volume and cost of detection device are reduced, so that the application for the lossless detection method based on initial permeability provides reference.
Description
Technical field
The present invention relates to non-destructive testing devices, more particularly to utilize the bearing based on initial permeability of Impulsive Difference signal
Inner ring rolling contact fatigue non-destructive testing device and production method.
Background technique
Rolling contact fatigue is a kind of surface fatigue breakoff phenomenon that workpiece surface is subjected to repeatedly pressure change, due to final
The stress that stress when fatigue failure occurs when being broken much smaller than material, so the process of fatigue failure is very slow.In work
In the good situation of condition, the generation of bearing inner race fatigue is typically derived from surface roughness variation or lack of lubrication.In addition to surface
Influence, the residual stress that inner peripheral surface generates also will affect fatigue life of bearing.The principal mode of fatigue failure is time table
Face origin type fatigue and surface origin type fatigue.And the germinating and extension of fatigue crack are the main process before failure generates.Table
The germinating and extension of facial cleft line will cause spot corrosion and subsurface crackle can then generate peeling.In addition to this, the extension of crackle with it is tired
The period of labor, there is linear relationships.So in the case where applicable elements are up to standard, the service life of bearing be substantially crackle not
The process of disconnected germinating expansion, peels off caused by crackle and generates, influence the normal use of bearing, bearing can fail.
The quality of bearing inner race is to assess the important indicator of bearing life, scientific research personnel to the fatigue life model of bearing into
A large amount of research is gone.The L-P model that Lundberg and Palmgren joint proposes then has been established entire bearing fatigue life and has been commented
The basis estimated, present each theory is derived from this basic theory.In order to preferably assess the service life of bearing,
Life model based on state-detection is suggested and conducts extensive research, and vibration, temperature, noise etc. are included in life model
Scope within, make great progress the accuracy of model.
It is the detection technique of a high-efficiency and economic based on initial permeability detection technique, does not need in test test specimen and sensing
Any contact is carried out between device.And the detection method based on initial permeability is it is possible to prevente effectively from magnetization and the influence demagnetized, inspection
Survey process does not cause any harm and influences on workpiece, is practical and effective detection method.Simultaneously based on initial permeability
Pulse signal then contains frequency content abundant, so the assessment of detection and material property for defect has extremely strong energy
Power.Impulse detection technique is widely used in the pipeline and high-temperature steam equipment of nuclear power station at present, due to impulse detection technique for
The low requirement of work, so producing good effect, the health evaluating for equipment simultaneously combines preventative maintenance plan, has
Effect alleviates the influence of structure degradation and pollution for equipment damage, substantially prolongs service life.
Due to the particularity of bearing arrangement, thus the rolling contact fatigue of roller bearing occur mainly with it is straight with bearing roller
The bearing inner race of contact.Since the fatigue failure of bearing has very big uncertainty, pass through the stress parameters of bearing at present
The bearing life estimation model designed with specific experiments situations such as load is the angle from statistics to estimate the service life of bearing.But
Specific to a certain bearing, due to the uncertainty in service life, so can not have a detection well for bearing state, also not
It can be assessed for the health status of a certain bearing.Since rolling contact fatigue is slow and is not easy to examine before bearing failure
Feel, so current detection method is to it, there is no good detection effects.
On the whole, existing detection device is complicated there are technology and the problems such as cannot effectively detecting latent defect.
Summary of the invention
Goal of the invention：The deficiencies of limited to bearing inner race rolling contact fatigue detectability for existing detection means it
Place, the present invention provides a kind of bearing inner race rolling contact fatigue based on initial permeability that status assessment may be implemented is lossless
Detection device, effectively to detect the rolling contact fatigue state of bearing inner race.
Technical solution：Bearing inner race rolling contact fatigue non-destructive testing device based on initial permeability, including：
Two or more detection sensors are distributed in the axially distinct position of bearing inner race, including are located at sensor detection faces
Excitation coil, induction coil and the FERRITE CORE inside induction coil, detection sensor detects not same district respectively
The defect in domain；
Detection platform, pedestal including platform, the motor that bearing rotary torque is provided, fixed test sensor sensor
The bearing supporting frame of retainer, fixing bearing inner ring, and prevent the support frame baffle of bearing inner race axial runout；
Signal processing link, including providing Direct Digital Synthesizer, the control detection device operation of pumping signal
Embedded system controller, by the data of the power amplifier of pumping signal power amplification and acquisition testing signal acquire
Card.
Excitation coil and induction coil are concordant with the end face of FERRITE CORE.The differential signal of induction coil is detection rolling
The foundation of dynamic contact fatigue state.
Bearing inner race rotates under the co-location effect of bearing inner race support frame and support frame baffle, the axis of sensor
Same level is in the axis of bearing inner race and motor.The setting regions of each sensor detection bearing inner race.
The pumping signal that Direct Digital Synthesizer generates is transported to excitation coil by power amplifier amplification, number
The signal of two-way induction coil is acquired according to capture card and does difference.
The method for making the bearing inner race rolling contact fatigue non-destructive testing device based on initial permeability, including following step
Suddenly：
(1) several excitation coils and induction coil are wound；
(2) several sensor frameworks are made in the way of 3D printing and sensor pours mold；
(3) by epoxy resin pour in the way of by excitation coil, induction coil, ferrite and lead-out wire gluing for detection
Sensor；
(4) motor, pedestal, bearing inner race support frame and sensor holder etc. are installed on a fixed platform；
(5) by Direct Digital Synthesizer, embedded system controller, power amplifier, data collecting card number
It links together according to line；
(6) the data harness of data collecting card is drawn, to send data to signal processing system.
Beneficial effect：Compared with prior art, the lossless inspection of the rolling contact fatigue of the invention based on initial permeability
Device is surveyed, using the difference value of two paths of signals as detection foundation, can effectively avoid existing lift-off in the detection process
Effect, relative position and temperature environment change the influence to detectability.Therefore, the present invention can meet rolling contact fatigue state
The functional requirement of detection provides effective testing result to judge the service condition of bearing；To for based on initial permeability
The extensive use of lossless detection method provides reference.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is detection schematic diagram of the invention；
Fig. 3 is detection scheme schematic diagram of the invention；
Fig. 4 is detection sensor schematic diagram of the invention.
Specific embodiment
Non-destructive testing device includes detection sensor, detection platform and signal processing link.Detection sensor includes being located at
The first excitation coil 1 and the second excitation coil 5, the first induction coil positioned at excitation coil inner ring of sensor detection faces outer ring
3 and second induction coil 7, and the first FERRITE CORE 2 and the second FERRITE CORE 6 inside induction coil, detection
Sensor is column shape, and end face is detection working face, another end face is by outconnector.Excitation coil and induction coil
It is concordant with the end face of FERRITE CORE, and be located in sensor detection faces；The extraction of the lead-out wire and induction coil of excitation coil
Line is connected with external control system.Detection platform includes the pedestal 10 of platform, the motor 8 of offer bearing rotary torque, fixation
The sensor holder 9 of sensor position, fixing bearing inner ring position bearing supporting frame 12, prevent bearing inner race axial runout
Support frame baffle 11, wherein motor 8 is slowspeed machine, coaxial with bearing inner race support frame and bearing inner race, and closely connect connection
It is connected together；Bearing inner race support frame one end is connected with electric machine main shaft, and the other end is responsible for fixing bearing inner ring, and passes through support frame
Baffle comes fixing bearing inner ring position.Signal processing link includes the Direct Digital Synthesizer for providing pumping signal, control
The embedded system controller of detection device processed operation, by the power amplifier of pumping signal power amplification, acquisition testing signal
Data collecting card；The extraction harness of data acquisition is connected with external signal processing system.
As shown in Figure 1, motor 8 is fixed on pedestal 10, bearing inner race support frame 12 passes through shaft coupling and 8 phase of motor
Even；Bearing inner race 4 can closely cover on bearing inner race support frame 12, and fix axial position by support frame baffle 11.
Two sensor a are separately fixed at the both ends of sensor holder 9, and sensor holder 9 is fixed on pedestal 10；While this
Two sensor a are located at the two sides of bearing inner race 4, and the axis of the central axis and bearing inner race that make sensor a is in same water
In plane.The relative position of two sensor a is adjustable, so that detection system adapts to the inspection of the bearing inner race of different model
It surveys.
Pulse excitation signal is issued by Direct Digital Synthesizer, is amplified by power amplifier, then by signal
It is sent to excitation coil.The signal sensed is sent to data collecting card and carries out digital collection by induction coil.By embedded
System controller controls all links.
As shown in Figure 2 and Figure 3, in the case where bearing inner race 4 rotates clockwise, the two sensors of two sides can be by axis
The all outer surfaces for holding inner ring all cover.Wherein, the first excitation coil 1 and the second excitation coil 5 offer pumping signal, first
Induction coil 3 and the second induction coil 7 can obtain detection signal.First FERRITE CORE 2 and the second FERRITE CORE 6 can be with
It is effective to strengthen magnetic field, improve the detectability of sensor.
Since the width of bearing inner race 4 is greater than the detection range of each sensor, a biography is respectively arranged in two sides
Sensor a is responsible for two different regions of bearing inner race.With the rotation of bearing inner race, two sensors can be examined effectively
Survey the rolling contact fatigue state of all outer surfaces of bearing inner race 4.
As shown in figure 4, excitation coil 1 provides pumping signal, induction coil 3 obtains detection signal.Utilize two lines of induction
Foundation of the difference value of circle as detection, because two induction coils are to the reflection feelings of the variation in magnetic field caused by same place defect
Condition is different, so can effectively detect to be in rolling contact using the differential signal of two induction coils as detection foundation
The state of fatigue, and eliminate Lift-off effect, temperature and the environmental change influence caused by detection.Sensor framework 14 is for fixing
The position of all parts, 14 periphery of middle skeleton are process by cylinder, and the purpose of design is to paste when pouring
The internal surface of column for molding tool, is overlapped the axis of sensor with the axis of coil.
A kind of bearing inner race rolling contact fatigue non-destructive testing based on initial permeability making achievable status assessment
The method of device, includes the following steps：
(1) several self-adhering type excitation coils and induction coil are wound；
(2) several sensor frameworks are made in the way of 3D printing and sensor pours mold；
(3) by epoxy resin pour in the way of by excitation coil, induction coil, ferrite and lead-out wire gluing for detection
Sensor；
(4) motor, pedestal, bearing inner race support frame and sensor holder etc. are installed on a fixed platform；
(5) by the number such as Direct Digital Synthesizer, embedded system controller, power amplifier, data collecting card
It links together according to line；
(6) the data harness of data collecting card is drawn, to send data to signal processing system.
In use, bearing inner race is mounted on bearing inner race support frame first, support frame baffle is installed later
Ensure that bearing inner race will not be subjected to displacement during rotation.The whole flow process of detection is all controlled by embedded system, first
Motor power circuit is connected by relay to make motor to slowly run.Purpose using slowspeed machine is in a complete cycle
Detection process in acquisition testing data as much as possible.Direct Digital Synthesizer generates initial signal later, passes through
Initial signal is become pumping signal by power amplifier, and pumping signal is transmitted to excitation coil, excitation coil by data link
The changing magnetic field of generation can generate induced magnetic field on the surface of bearing inner race.And induction coil can effectively capture this sense
Magnetic field is answered, while the information of the defect of rolling contact fatigue can be also reflected among this induced magnetic field.Due to two lines of induction
It encloses and is different relative to the position of same place defect, so same place defect can inspire different senses in two induction coils
Induction signal.Data collecting card acquires this two-way inductive signal, and the signal of defect can be significantly found by the method for difference
And judge its position and size.Two sensors detect the defect situation of different zones respectively, can effectively judge at present
The rolling contact fatigue state of bearing.
Claims (7)
1. a kind of bearing inner race rolling contact fatigue non-destructive testing device, it is characterised in that：Including：
Two or more detection sensors are distributed in the axially distinct position of bearing inner race, including being located at swashing for sensor detection faces
Encourage coil, induction coil and the FERRITE CORE inside induction coil；
Detection platform, the sensor holding of pedestal, motor, fixed test sensor that bearing rotary torque is provided including platform
The bearing supporting frame of frame, fixing bearing inner ring, and prevent the support frame baffle of bearing inner race axial runout；
Signal processing link, including providing the Direct Digital Synthesizer of pumping signal, controlling the embedding of detection device operation
Embedded system controller, by the power amplifier of pumping signal power amplification and the data collecting card of acquisition testing signal.
2. bearing inner race rolling contact fatigue non-destructive testing device according to claim 1, it is characterised in that：The excitation
Coil and induction coil are concordant with the end face of FERRITE CORE.
3. bearing inner race rolling contact fatigue non-destructive testing device according to claim 1, it is characterised in that：The induction
The differential signal of coil is the foundation for detecting rolling contact fatigue state.
4. bearing inner race rolling contact fatigue non-destructive testing device according to claim 1, it is characterised in that：The bearing
Inner ring rotates under the co-location effect of bearing inner race support frame and support frame baffle, the axis of sensor and bearing inner race and
The axis of motor is in same level.
5. bearing inner race rolling contact fatigue non-destructive testing device according to claim 1, it is characterised in that：It is described each
The setting regions of sensor detection bearing inner race.
6. bearing inner race rolling contact fatigue non-destructive testing device according to claim 1, it is characterised in that：It is described direct
The pumping signal that digital frequency synthesizer generates is transported to excitation coil, data collecting card acquisition by power amplifier amplification
The signal of two-way induction coil simultaneously does difference.
7. a kind of side of production such as bearing inner race rolling contact fatigue non-destructive testing device as claimed in any one of claims 1 to 6
Method, it is characterised in that：Include the following steps：
(1) several excitation coils and induction coil are wound；
(2) several sensor frameworks are made in the way of 3D printing and sensor pours mold；
(3) by epoxy resin pour in the way of by excitation coil, induction coil, ferrite and lead-out wire gluing for detection sensing
Device；
(4) motor, pedestal, bearing inner race support frame and sensor holder etc. are installed on a fixed platform；
(5) by Direct Digital Synthesizer, embedded system controller, power amplifier, data collecting card data line
It links together；
(6) the data harness of data collecting card is drawn, to send data to signal processing system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810336609.4A CN108918651A (en) | 2018-04-16 | 2018-04-16 | Bearing inner race rolling contact fatigue non-destructive testing device and production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810336609.4A CN108918651A (en) | 2018-04-16 | 2018-04-16 | Bearing inner race rolling contact fatigue non-destructive testing device and production method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108918651A true CN108918651A (en) | 2018-11-30 |
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|---|---|---|---|
| CN201810336609.4A Pending CN108918651A (en) | 2018-04-16 | 2018-04-16 | Bearing inner race rolling contact fatigue non-destructive testing device and production method |
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Citations (6)
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|---|---|---|---|---|
| JP2007101524A (en) * | 2005-09-09 | 2007-04-19 | Nsk Ltd | Eddy current test method for rolling bearing component |
| JP2008032679A (en) * | 2006-05-26 | 2008-02-14 | Nsk Ltd | Method and device for inspecting product defect of rolling device component |
| WO2008135123A1 (en) * | 2007-05-04 | 2008-11-13 | Rothe Erde Gmbh | Device for detecting and monitoring damage to rolling bearings |
| CN101995433A (en) * | 2009-08-17 | 2011-03-30 | 通用电气公司 | Apparatus and method for bearing condition monitoring |
| US20110241661A1 (en) * | 2009-12-17 | 2011-10-06 | Nsk Ltd. | Bearing residual life prediction method, bearing residual life diagnostic apparatus and bearing diagnostic system |
| CN102426189A (en) * | 2011-10-21 | 2012-04-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Impulse detection method for bearing |
-
2018
- 2018-04-16 CN CN201810336609.4A patent/CN108918651A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007101524A (en) * | 2005-09-09 | 2007-04-19 | Nsk Ltd | Eddy current test method for rolling bearing component |
| JP2008032679A (en) * | 2006-05-26 | 2008-02-14 | Nsk Ltd | Method and device for inspecting product defect of rolling device component |
| WO2008135123A1 (en) * | 2007-05-04 | 2008-11-13 | Rothe Erde Gmbh | Device for detecting and monitoring damage to rolling bearings |
| CN101995433A (en) * | 2009-08-17 | 2011-03-30 | 通用电气公司 | Apparatus and method for bearing condition monitoring |
| US20110241661A1 (en) * | 2009-12-17 | 2011-10-06 | Nsk Ltd. | Bearing residual life prediction method, bearing residual life diagnostic apparatus and bearing diagnostic system |
| CN102426189A (en) * | 2011-10-21 | 2012-04-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Impulse detection method for bearing |
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| Title |
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| 刘杰等: "基于初始磁导率的轴承内圈滚动接触疲劳无损检测系统", 《中国科技论文在线》 * |
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Application publication date: 20181130 |
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