CN108168885A - Shaft current is to the analog platform of wind power generating set bearing performance degradation effects - Google Patents
Shaft current is to the analog platform of wind power generating set bearing performance degradation effects Download PDFInfo
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- CN108168885A CN108168885A CN201711326834.1A CN201711326834A CN108168885A CN 108168885 A CN108168885 A CN 108168885A CN 201711326834 A CN201711326834 A CN 201711326834A CN 108168885 A CN108168885 A CN 108168885A
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- China
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- permanent
- driven generator
- wind driven
- magnetic wind
- brushless motor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
Abstract
A kind of shaft current is to the analog platform of wind power generating set bearing performance degradation effects, fixed DC brushless motor is installed on lower plate, fixed permanent-magnetic wind driven generator is installed on upper plate, DC brushless motor and permanent-magnetic wind driven generator pass through belt and pulley drive, axis among brush and belt pulley and permanent-magnetic wind driven generator is in contact, motor speed control device is on the right side of DC brushless motor, electric machine controller is fixed on lower bottom base, on motor speed control device, microcontroller is connected with the pwm signal receiving module of electric machine controller, the output terminal of permanent-magnetic wind driven generator is connect with power consumpting device, signal acquiring system is formed by sensor and with data collecting card；External power supply forms circuit through brush, axis, bearing and permanent-magnetic wind driven generator.Present invention research wind power generating set bearing fault as caused by shaft current reason, and then lead to bearing performance decline until the bearing performance degenerative process of failure.
Description
Technical field
The present invention relates to wind power generating set bearings, especially permanent-magnetic wind driven generator group bearing, are related to a kind of shaft current
To the analog platform of wind power generating set bearing performance degradation effects.
Background technology
In recent years, with the installed capacity rapid growth of China's wind power generating set, the maintenance issues of wind power generating set
It becomes increasingly conspicuous.Wind power generating set be typically mounted on have inconvenient traffic, the outer suburbs or coastal area of bad environments, and cabin is usually remote
From the ground, generating set can lead to entire compressor emergency shutdown, thus will lead to huge economic loss and costliness once breaking down
Maintenance cost.Bearing is a crucial parts in wind power generating set, the failures of many wind power generating sets be by
Caused by bearing fault, it is therefore necessary to the reason of breaking down to wind power generating set middle (center) bearing, mechanism, performance degradation process
Etc. being studied.Currently, to the research of wind power generating set middle (center) bearing failure mainly from load is excessive, insufficient lubrication etc.
The reason of caused bearing fatigue wear occurs and then leads to what the aspect of its performance degradation was unfolded.Due to imperfect earth, insulation
The reasons such as aging, the extensive use of Semiconductor Converting Technology, easily there is shaft current generation in wind power generating set, so as to cause bearing event
Barrier, and then lead to the failure of bearing.
Invention content
In order to study the wind power generating set bearing fault as caused by shaft current, the present invention provides a shaft current to wind-force
The analog platform that generator bearing performance degradation influences studies the wind power generating set bearing event as caused by shaft current reason
Barrier, and then lead to bearing performance decline until the bearing performance degenerative process of failure.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of shaft current is to the analog platforms of wind power generating set bearing performance degradation effects, including liftable engine base, straight
Flow brushless motor, permanent-magnetic wind driven generator, belt, belt pulley, brush, motor speed control device, DC power supply, external power supply, electricity
Energy consumer and signal acquiring system, the liftable engine base include lower plate, threaded rod, screw shell and upper plate, institute
It states and the fixed DC brushless motor is installed on lower plate, the fixed permanent-magnetic wind driven generator of installation, institute on the upper plate
DC brushless motor and the permanent-magnetic wind driven generator are stated by the belt and the pulley drive, the brush with it is described
Axis among belt pulley and the permanent-magnetic wind driven generator is in contact, and the motor speed control device is on the DC brushless motor right side
Side, the motor speed control device include electric machine controller and microcontroller, and the electric machine controller is fixed on the lower bottom base, institute
It states microcontroller with the pwm signal receiving module of the electric machine controller to be connected, the output terminal of the permanent-magnetic wind driven generator and institute
State power consumpting device connection, the signal acquiring system is by being used to acquiring vibration and the current signal of permanent-magnetic wind driven generator
Sensor and for receive the data collecting card of the collected signal of the sensor composition；The external power supply is through the electricity
Brush, the axis, the bearing and the permanent-magnetic wind driven generator form circuit.
In the present invention, electric current is flowed out from the external power supply by protective resistance, the brush, the axis, the bearing,
The permanent-magnetic wind driven generator forms circuit, and due to insulation and the open circuit of other parts, therefore the circuit is unique, in the circuit
Electric current causes failure to the bearing after the bearing and then causes its performance degradation, with this wind-driven generator simulation bearing
The bearing failure as caused by shaft current reason.
Further, the DC brushless motor is controlled by the motor speed control device, and the motor speed control device is by described
Microcontroller control, the microcontroller programming into program control under output duty cycle dynamic change PWM wave, the PWM wave
Determine the rotating speed of the DC brushless motor.
Further, the sensor includes vibrating sensor and current probe, and the vibrating sensor is fixed on
On insulation spacer, the insulation spacer is fixed on the permanent-magnetic wind driven generator, and the current probe is clipped in the permanent magnetism wind
In the phase output of power generator.
Further, the power consumpting device include rectifier and cement resistor, the permanent-magnetic wind driven generator it is defeated
Outlet, rectifier and cement circuit form consumption circuit.The alternating current that the rectifier generates the permanent-magnetic wind driven generator
Direct current is converted into, after the direct current flows through the cement resistor, electric energy is consumed in the form of thermal energy.
Beneficial effects of the present invention are mainly manifested in：(1) device is easily controllable, and the program control of microcontroller is entered with programming
The duty ratio of pwm signal processed, and then the rotating speed of DC brushless motor is controlled, its variable speed is allowed to run, it can also be by adapting journey
Sequence control DC brushless motor is run by it under stabilized (steady-state) speed, realizes that shaft current is to bearing of wind power generator under different operating modes
Energy degradation effects are researched and analysed；(2) it is real by changing the input voltage size of external power supply or changing input current type
Now researched and analysed using different size of current, type on what bearing of wind power generator performance degradation influenced；(3) device acquires simultaneously
Vibration and the current signal of wind-driven generator are, it can be achieved that real time monitoring to bearing of wind power generator, collected signal data
Can on host computer real-time display, can effectively avoid using single signal analysis to the mistake of bearing of wind power generator health status
Sentence；(4) adjustment of wind-driven generator height can control the pretightning force of belt by lifting platform, so as to mould
Intend wind power generating set bear wind wheel blade weight and generated stress loading.
Description of the drawings
Fig. 1 is the analog platform front view that shaft current influences bearing of wind power generator performance degradation；
Fig. 2 is the analog platform left view that shaft current influences bearing of wind power generator performance degradation；
Fig. 3 is the analog platform sectional view that shaft current influences bearing of wind power generator performance degradation；
Fig. 4 is two side view of analog platform axis that shaft current influences bearing of wind power generator performance degradation.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
With reference to 1~Fig. 4 of attached drawing, the analog platform that a kind of shaft current influences bearing of wind power generator performance degradation, including
Liftable engine base, DC brushless motor, permanent-magnetic wind driven generator, belt, belt pulley, brush, motor speed control device, direct current
Source, external power supply, power consumpting device and signal acquiring system, the liftable engine base include lower plate, threaded rod, thread bush
Cylinder and upper plate, the fixed DC brushless motor of installation on the lower plate, the fixed permanent magnetism of installation on the upper plate
Wind-driven generator, the DC brushless motor and the permanent-magnetic wind driven generator by the belt and the pulley drive,
Axis among the brush and the belt pulley and the permanent-magnetic wind driven generator is in contact, and the motor speed control device is described
On the right side of DC brushless motor, the motor speed control device includes electric machine controller and microcontroller, is powered by the DC power supply, institute
Electric machine controller is stated to be fixed on the lower bottom base, on the motor speed control device, the microcontroller and the electric machine controller
Pwm signal receiving module be connected, the power consumpting device include rectifier and cement resistor, consumption generator generate electricity
Can, the signal acquiring system is made of sensor and data collecting card, and the sensor acquisition permanent-magnetic wind driven generator shakes
Dynamic and current signal, the data collecting card receive the collected signal of sensor；The external power supply through the brush,
The axis, the bearing and the permanent-magnetic wind driven generator form circuit.
Platform is powered by DC power supply, and DC power supply is connected with electric machine controller 18, DC brushless motor 19
Power cord is connect with the corresponding interface of Hall mutually respectively with electric machine controller 18, forms power input portion；DC brushless motor
Belt pulley 12 is driven to rotate after 19 output shaft rotation, belt 13 imparts power to belt pulley 15 again, and belt pulley 15 is by power
The input shaft of permanent-magnetic wind driven generator 3 is transmitted to, forms running part；The input shaft of permanent-magnetic wind driven generator 3 is by 15 band of belt pulley
Start to generate electricity after dynamic rotation, send out electric current by rectifier, after cement resistor, electric energy is consumed, and forms the output par, c of system.
In the present embodiment, threaded rod 7 is connected on lower bottom base 10, screw shell 9, screw shell are installed on threaded rod 7
While supporting upper bed-plate 8, it can be lifted by the screw thread of threaded rod 7.
In the present embodiment, the alternating current that permanent-magnetic wind driven generator 3 is sent out is after the rectifier by carrying rectification circuit
Become direct current, direct current is consumed in the form of thermal energy the electric energy of generation by cement resistor.
In the present embodiment, shaft current is generated by external power supply, after the clamping part 24 that the electric current of generation passes through A-frame 5
Carbon brush 21 is transmitted to by conducting wire, bearing 20 is reached after the input shaft of permanent-magnetic wind driven generator 3, shaft current passes through bearing 20
Bearing 20 can be caused to break down and then the performance of bearing 20 is caused to be degenerated, last electric current passes through permanent-magnetic wind driven generator again
External power supply is flowed back to after 3 shell and protective resistance, forms complete circuit.
In the present embodiment, the A-frame 5 of installation carbon brush 21 is connected by the hole of clamping part 24 with the insulating end of brush holder support 6,
It is fastened by bolts, the other end of brush holder support 6 is connected with fixing bracket 4, and fixing bracket 4 is fastened on upper bed-plate 8, it is ensured that Gu
The carbon brush 21 that fixed rack 4 supports is tightly attached in the rotary shaft of permanent-magnetic wind driven generator 3.
In the present embodiment, the rotating speed of DC brushless motor 19 is linearly closed with the pwm signal duty ratio of electric machine controller 18
System, power input portion exports the pwm signal of setting duty ratio by control single chip computer, and then controls DC brushless motor 19
Rotating speed.
In the present embodiment, on 1 fixed insulator pad piece 2 of vibrating sensor, insulation spacer 2 is fixed on permanent-magnetic wind driven generator 3
On, the vibration signal of acquisition permanent-magnetic wind driven generator 3, the electric current in addition exported with current probe acquisition permanent-magnetic wind driven generator 3
Signal, vibrating sensor 1 and current probe are connected with data collecting card, and collected signal is transmitted to host computer by the capture card
Afterwards, a series of subsequent operations such as signal preservation, analyzing and processing are carried out by host computer.
The operation principle and the course of work of the present embodiment are as follows：
After opening DC power supply, DC brushless motor 19 starts to rotate, meanwhile, microcontroller is started to work, and is controlled for motor
Device 18 is controlled the rotating speed of DC brushless motor 19, is passed through belt pulley by the pwm signal of the situation input different duty of setting
12nd, belt 13, belt pulley 15 impart power to permanent-magnetic wind driven generator 3, and simulation permanent-magnetic wind driven generator 3 is under different rotating speeds
Work situation about running.Simultaneously external power supply by electric current by A-frame 5, carbon brush 21, the input shaft of permanent-magnetic wind driven generator 3,
Bearing 20, the shell of permanent-magnetic wind driven generator 3 return to power supply after protective resistance, form complete current loop, bearing 20 is made to exist
It works under the influence of electric current.The health status of bearing 20 is from the vibration signal of permanent-magnetic wind driven generator 3 and the current signal of output
On reflect, vibrating sensor 1 acquire permanent-magnetic wind driven generator 3 vibration signal, current probe acquisition permanent magnet wind generating
The current signal that machine 3 exports, vibrating sensor 1 and current probe are connected with data collecting card, and the capture card will be collected
After signal is transmitted to host computer, a series of subsequent operations such as signal preservation, analyzing and processing are carried out by host computer.
The analog platform that shaft current provided by the invention influences bearing of wind power generator performance degradation has following excellent
Point：
(1) device is easily controllable, and the duty ratio of the program control pwm signal of microcontroller is entered with programming, and then controls
The rotating speed of DC brushless motor allows its variable speed to run, and also can control DC brushless motor by it in stabilization by reprogramming
It is run under rotating speed, realizes that shaft current is researched and analysed on what bearing of wind power generator performance degradation influenced under different operating modes；
(2) it by changing the input voltage size of external power supply or changing input current type, realizes and utilizes different electric currents
Size, type are researched and analysed on what bearing of wind power generator performance degradation influenced；
(3) device acquire simultaneously wind-driven generator vibration and current signal, it can be achieved that reality to bearing of wind power generator
When monitor, collected signal data can on host computer real-time display, can effectively avoid using single signal analyze to wind-force
The erroneous judgement of dynamo bearing health status；
(4) by adjustment of the lifting platform to generator height, and then coarse adjustment control can be carried out to the pretightning force of belt,
So as to wind-driven generator simulation group bear wind wheel blade weight and generated stress loading.
Embodiment of above is merely to illustrate the present invention, and not limitation of the present invention, the common technique in relation to field
Personnel without departing from the spirit and scope of the present invention, can also make a variety of changes and deform, therefore is all equivalent
Technical solution also belong to scope of the invention, scope of patent protection of the invention should be determined by claim.
Claims (4)
1. a kind of shaft current is to the analog platform of wind power generating set bearing performance degradation effects, it is characterised in that：Including that can rise
Engine base, DC brushless motor, permanent-magnetic wind driven generator, belt, belt pulley, brush, motor speed control device, DC power supply, outer drops
Connect power supply, power consumpting device and signal acquiring system, the liftable engine base include lower plate, threaded rod, screw shell and
Upper plate, the fixed DC brushless motor of installation on the lower plate, the fixed permanent-magnet wind power of installation on the upper plate
Generator, the DC brushless motor and the permanent-magnetic wind driven generator are described by the belt and the pulley drive
Axis among brush and the belt pulley and the permanent-magnetic wind driven generator is in contact, and the motor speed control device is in the direct current
On the right side of brushless motor, the motor speed control device includes electric machine controller and microcontroller, and the electric machine controller is fixed on described
On lower bottom base, the microcontroller is connected with the pwm signal receiving module of the electric machine controller, the permanent-magnetic wind driven generator
Output terminal is connect with the power consumpting device, the signal acquiring system by be used to acquiring permanent-magnetic wind driven generator vibration and
The sensor of current signal and for receive the data collecting card of the collected signal of the sensor composition；The external power supply
Circuit is formed through the brush, the axis, the bearing and the permanent-magnetic wind driven generator.
2. shaft current as described in claim 1 is to the analog platform of wind power generating set bearing performance degradation effects, feature
It is：The DC brushless motor is controlled by the motor speed control device, and the motor speed control device is controlled by the microcontroller,
The microcontroller programming into program control under output duty cycle dynamic change PWM wave, the PWM wave determines the direct current
The rotating speed of brushless motor.
3. shaft current as claimed in claim 1 or 2 is to the analog platform of wind power generating set bearing performance degradation effects, special
Sign is：The sensor includes vibrating sensor and current probe, and the vibrating sensor is fixed on insulation spacer,
The insulation spacer is fixed on the permanent-magnetic wind driven generator, and the current probe is clipped in the one of the permanent-magnetic wind driven generator
Mutually in output.
4. shaft current as claimed in claim 1 or 2 is to the analog platform of wind power generating set bearing performance degradation effects, special
Sign is：The power consumpting device includes rectifier and cement resistor, output terminal, the rectifier of the permanent-magnetic wind driven generator
Consumption circuit is formed with cement circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711326834.1A CN108168885A (en) | 2017-12-13 | 2017-12-13 | Shaft current is to the analog platform of wind power generating set bearing performance degradation effects |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711326834.1A CN108168885A (en) | 2017-12-13 | 2017-12-13 | Shaft current is to the analog platform of wind power generating set bearing performance degradation effects |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108168885A true CN108168885A (en) | 2018-06-15 |
Family
ID=62525763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711326834.1A Pending CN108168885A (en) | 2017-12-13 | 2017-12-13 | Shaft current is to the analog platform of wind power generating set bearing performance degradation effects |
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| CN (1) | CN108168885A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102053015A (en) * | 2009-10-30 | 2011-05-11 | 中国石油化工股份有限公司 | Tester for thrust bearing |
| CN104792533A (en) * | 2015-04-29 | 2015-07-22 | 武汉理工大学 | Integrated testbed for numerical control machine spindle thermal error causes and test method |
| CN105486506A (en) * | 2016-01-21 | 2016-04-13 | 湖南科技大学 | Motor bearing shaft current damage simulation test device |
| CN105699081A (en) * | 2016-01-21 | 2016-06-22 | 湖南科技大学 | Bearing shaft current damage comprehensive performance test device |
| CN206378294U (en) * | 2017-01-06 | 2017-08-04 | 湖南科技大学 | Simulated machine bearing axle electric current-producing device |
| CN207850686U (en) * | 2017-12-13 | 2018-09-11 | 浙江工业大学 | Analog platform of the shaft current to wind power generating set bearing performance degradation effects |
-
2017
- 2017-12-13 CN CN201711326834.1A patent/CN108168885A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102053015A (en) * | 2009-10-30 | 2011-05-11 | 中国石油化工股份有限公司 | Tester for thrust bearing |
| CN104792533A (en) * | 2015-04-29 | 2015-07-22 | 武汉理工大学 | Integrated testbed for numerical control machine spindle thermal error causes and test method |
| CN105486506A (en) * | 2016-01-21 | 2016-04-13 | 湖南科技大学 | Motor bearing shaft current damage simulation test device |
| CN105699081A (en) * | 2016-01-21 | 2016-06-22 | 湖南科技大学 | Bearing shaft current damage comprehensive performance test device |
| CN206378294U (en) * | 2017-01-06 | 2017-08-04 | 湖南科技大学 | Simulated machine bearing axle electric current-producing device |
| CN207850686U (en) * | 2017-12-13 | 2018-09-11 | 浙江工业大学 | Analog platform of the shaft current to wind power generating set bearing performance degradation effects |
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