CN105486506B - A kind of simulated machine bearing shaft current damage test device - Google Patents
A kind of simulated machine bearing shaft current damage test device Download PDFInfo
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- CN105486506B CN105486506B CN201610039716.1A CN201610039716A CN105486506B CN 105486506 B CN105486506 B CN 105486506B CN 201610039716 A CN201610039716 A CN 201610039716A CN 105486506 B CN105486506 B CN 105486506B
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- bearing
- shaft current
- live spindle
- shaft
- damage test
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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
The invention discloses a kind of simulated machine bearing shaft current damage test devices, including driving device, transmission device, measure and control device, loading device, transmission device includes live spindle, shaft coupling, bearing and bearing block, driving device is connected through shaft coupling with live spindle, two bearings are symmetrically arranged in live spindle, the outer ring of bearing is fixed on bearing block, and bearing block is mounted on the base；Loading device includes shaft current generation device and radial load loading device, and shaft current generation device is connected with live spindle, and bearing outer ring is mounted on bearings by wired earth, radial load loading device；Measure and control device includes vibration acceleration sensor, speed probe, current sensor, force snesor, capture card and host computer.The present invention passes through the combination of loading device and measure and control device, simulates bearing under different operating conditions, shaft current difference degree of impairment caused by bearing, provides test basis and support for the fault pre-alarming and operational reliability of motor bearings.
Description
Technical field
The present invention relates to motor field, in particular to a kind of simulated machine bearing shaft current damage test device.
Background technique
Bearing is motor important composition component, is highly prone to damage.Damage of the bearing generally has thermal damage, power damage and electricity damage
Three kinds of wound, wherein again based on electric injury.According to Document system, 25% damage of the bearing is due to caused by shaft current.Modern electricity
Machine frequency converter modulates (PWM) technology using pulse width, and there are common-mode voltages, i.e. PWM at motor three-phase windings neutral point for meeting
The residual voltage of inverter output.The presence of common-mode voltage can induce shaft voltage on machine shaft, when shaft voltage reaches oil
When the threshold voltage of film, oil film generation shaft current can be punctured to cause to damage to bearing and shorten the service life of bearing.Institute
With the experimental rig of this simulated machine bearing shaft current damage, for studying the fault pre-alarming of motor bearings and improving motor
Bearing operational reliability has important engineering practical value.It is most from how protecting bearing not damaged by shaft current both at home and abroad at present
From the point of view of wound, without not excavating for how to detect and identify that shaft current influences to study caused by bearing
The formation of shaft current and shaft current cause the essence of damage to bearing, so resulting in that the comprehensive failure of bearing progress cannot be examined
It is disconnected.
Summary of the invention
In order to solve the above technical problem, the present invention provides a kind of structures simply, can simulate motor bearings under real working condition
The simulated machine bearing shaft current damage test device of shaft current Damage Evolution process.
Technical proposal that the invention solves the above-mentioned problems is: a kind of simulated machine bearing shaft current damage test device, packet
Include driving device, transmission device, measure and control device, loading device and pedestal, the transmission device include live spindle, shaft coupling,
Bearing, fulcrum bearing and bearing block, the driving device and fulcrum bearing are separately mounted to pedestal two sides, driving device through shaft coupling with
One end of live spindle is connected, and the other end of live spindle is mounted in fulcrum bearing, is arranged with and turns in the middle part of the live spindle
Disk is symmetrically set in live spindle there are two bearing, and the inner ring of bearing is fixed in live spindle, and the outer ring of bearing is fixed on
On bearing block, bearing block is mounted on the base；The loading device includes that shaft current generation device and radial load load fill
It sets, shaft current generation device is connected with live spindle, and bearing outer ring is mounted on by wired earth, radial load loading device
On bearing；The measure and control device includes vibration acceleration sensor, speed probe, current sensor, force snesor, capture card
And host computer, the vibration acceleration sensor are mounted on the side of bearing and contact with bearing outer ring, speed probe installation
In live spindle, current sensor is mounted between bearing block and bearing, and force snesor is mounted on bearing block side, and vibration adds
Velocity sensor, speed probe, current sensor, the signal output end of force snesor are connected with the input terminal of capture card, adopt
The output end of truck is connected with host computer.
In above-mentioned simulated machine bearing shaft current damage test device, the shaft current generation device include battery,
Fuse, resistance, slide rheostat, brush, switch, the battery, fuse, switch, resistance, brush are sequentially connected in series, sliding
Dynamic rheostat is attempted by resistance both ends, and brush is connected with live spindle.
In above-mentioned simulated machine bearing shaft current damage test device, the live spindle and shaft coupling contact portion, axis
It holds and is equipped with insulating coating with bearing block contact portion.
In above-mentioned simulated machine bearing shaft current damage test device, the insulating coating uses aluminium oxide or titanium aluminum oxide
Powder.
In above-mentioned simulated machine bearing shaft current damage test device, safety guard is equipped with above the live spindle.
In above-mentioned simulated machine bearing shaft current damage test device, the bearing is deep groove ball bearing.
In above-mentioned simulated machine bearing shaft current damage test device, the driving device is variable-frequency motor.
In above-mentioned simulated machine bearing shaft current damage test device, cushion block is equipped between the variable-frequency motor and pedestal.
The beneficial effects of the present invention are: the present invention includes loading device and measure and control device, the shaft current of loading device
Generation device provides shaft voltage for main shaft, and the radial load loading device of loading device adjusts the radial load that bearing is born
Size, measure and control device are used to detect each state parameter of bearing, by the combination of loading device and measure and control device, easily and effectively
Simulate bearing under different operating conditions, shaft current difference degree of impairment caused by bearing, be motor bearings fault pre-alarming with mention
High wind-powered electricity generation machine bearing operational reliability provides test basis and support.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the scheme of installation of radial load charger in Fig. 1.
Fig. 3 is the A-A cross-sectional view of Fig. 1.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As shown in Figure 1, the present invention includes driving device, transmission device, measure and control device, loading device and pedestal 14.
The driving device is variable-frequency motor 1, and variable-frequency motor 1 is mounted on cushion block 12, and cushion block 12 is mounted on pedestal 14,
The shaft current that generates can be simulated under different rotating speeds to the degree of injury of bearing by controlling the revolving speed of variable-frequency motor 1.
The transmission device includes live spindle 4, turntable 7, shaft coupling 2, bearing 5, fulcrum bearing 11 and bearing block 16, described
Variable-frequency motor 1 and fulcrum bearing 11 are separately mounted to 14 two sides of pedestal, and 1 output shaft of variable-frequency motor is through shaft coupling 2 and live spindle 4
One end is connected, and live spindle 4 and 2 contact portion of shaft coupling are equipped with the first insulating coating 3, it is ensured that live spindle 4 and shaft coupling 2 are exhausted
Edge, the other end of live spindle 4 insulate through one end of shaft coupling 2 and transmission shaft 10 to be connected, and the other end of transmission shaft 10 is mounted on
In fulcrum bearing 11, fulcrum bearing 11 can bear the radial force and torque of transmission, and play a supporting role；In the live spindle 4
Portion is arranged with turntable 7, and turntable 7 can rotor portion inside equivalent substitution motor；Safety guard 13, rotation are equipped with above live spindle 4
Turn symmetrically to set on main shaft 4 there are two bearing 5, the bearing 5 is deep groove ball bearing, and the inner ring of bearing 5 is fixed on rotation master
On axis 4, the outer ring of bearing 5 is fixed on bearing block 16, and bearing block 16 is mounted on pedestal 14, and bearing 5 is contacted with bearing block 16
Part is equipped with the second insulating coating 9, it is ensured that bearing 5 and 16 contact position of bearing block are insulated, and the first insulating coating 3 and the second insulation apply
Layer 9 uses aluminium oxide or titanium aluminum oxide powder.
The loading device includes shaft current generation device and radial load loading device 8, and the shaft current generates
The generation of unit simulation shaft current comprising battery 18, fuse, resistance, slide rheostat, brush 17, switch, battery
18 are used as power supply, and fuse plays safeguard protection seat to circuit and use for preventing short circuit；The battery 18, fuse,
Switch, resistance, brush 17 are sequentially connected in series, and slide rheostat is attempted by resistance both ends, and brush 17 is connected with live spindle 4, are kept
Shaft current generation device is mutually conducted with 4 both ends of live spindle, and 5 outer ring of bearing passes through wired earth；Slide rheostat is adopted
With partial pressure type connection, the electric current of shaft current generation device output and the size of voltage can be continuously adjusted on a large scale, thus mould
The quasi- bearing film breakdown moment for generating shaft current, raceway is set to generate early stage microlesion regular to being gradually evolved into
Striated groove whole process；As shown in Fig. 2, radial load loading device 8 is connected on bearing 5 using helical spring,
It can be accurately adjusted the size for the radial load that actual condition lower bearing 5 is born by rotating helical spring, simulate shaft current
When being acted on simultaneously with radial load, the damage situation of change of raceway.
The measure and control device includes vibration acceleration sensor 20, speed probe 6, current sensor 15, force snesor
19, capture card and host computer, as shown in Figure 1, Figure 3, the vibration acceleration sensor 20 are mounted on the side of bearing 5 and and axis
Hold the contact of 5 outer rings, the vibration signal of 5 inner and outer ring raceway of bearing after test shaft current damage；Speed probe 6 is mounted on rotation master
On axis 4,5 revolving speed of bearing under different operating conditions is detected；Current sensor 15 is mounted between bearing block 16 and bearing 5, detection axis
Hold the size of oil film breakdown moment shaft current；Force snesor 19 is mounted on 16 side of bearing block, bearing diameter when test bearing 5 operates
The radial force size that the size of the radial force applied to loading device, i.e. bearing 5 are born；Vibration acceleration sensor 20,
Speed probe 6, current sensor 15, the signal output end of force snesor 19 are connected with the input terminal of capture card, capture card
Output end is connected with host computer, and corresponding acquisition signal is shown on host computer.
Working principle of the present invention is as follows: shaft current generation device simulates the generation of shaft current, and the shaft current of generation is logical
It crosses brush 17 and accesses live spindle 4, provide shaft voltage to part of detecting, the resistance value of circuit is accessed by adjusting slide rheostat,
To adjust the electric current of bearing electric current-producing device output and the size of voltage；It is adjusted under actual condition by rotation helical spring
The size for the radial load that bearing 5 is born；The vibration acceleration sensor 20 of measure and control device tests the axis after shaft current damage
The vibration signal of 5 inner and outer ring raceways is held, speed probe 6 detects 5 revolving speed of bearing under different operating conditions, 15 detection axis of current sensor
The size of oil film breakdown moment shaft current is held, bearing radial loading device is applied when 19 test bearing 5 of force snesor operates
The size of radial force, so that easily and effectively for simulation bearing 5 under different operating conditions, shaft current damages difference caused by bearing 5
Situation provides test basis and support for the fault pre-alarming and raising wind-powered electricity generation machine bearing operational reliability of motor bearings.
Claims (7)
1. a kind of simulated machine bearing shaft current damage test device, it is characterised in that: including driving device, transmission device, survey
Controlling device, loading device and pedestal, the transmission device includes live spindle, shaft coupling, bearing, fulcrum bearing and bearing block, institute
It states driving device and fulcrum bearing is separately mounted to pedestal two sides, driving device is connected through shaft coupling with one end of live spindle, rotation
The other end for turning main shaft is mounted in fulcrum bearing, and turntable, bilateral symmetry in live spindle are arranged in the middle part of the live spindle
If the inner ring of bearing is fixed in live spindle, and the outer ring of bearing is fixed on bearing block, and bearing block is mounted on there are two bearing
On pedestal；The loading device includes shaft current generation device and radial load loading device, shaft current generation device with
Live spindle is connected, and bearing outer ring is mounted on bearings by wired earth, radial load loading device；The measure and control device packet
Vibration acceleration sensor, speed probe, current sensor, force snesor, capture card and host computer are included, the vibration accelerates
Degree sensor is mounted on the side of bearing and contacts with bearing outer ring, and speed probe is mounted in live spindle, current sense
Device is mounted between bearing block and bearing, and force snesor is mounted on bearing block side, vibration acceleration sensor, revolution speed sensing
Device, current sensor, the signal output end of force snesor are connected with the input terminal of capture card, the output end and host computer of capture card
It is connected；The shaft current generation device includes battery, fuse, resistance, slide rheostat, brush, switch, the electric power storage
Pond, fuse, switch, resistance, brush are sequentially connected in series, and slide rheostat is attempted by resistance both ends, and brush is connected with live spindle.
2. simulated machine bearing shaft current damage test device according to claim 1, it is characterised in that:
The live spindle and shaft coupling contact portion, bearing and bearing block contact portion are equipped with insulating coating.
3. simulated machine bearing shaft current damage test device according to claim 2, it is characterised in that:
The insulating coating uses aluminium oxide or titanium aluminum oxide powder.
4. simulated machine bearing shaft current damage test device according to claim 1, it is characterised in that: the rotation master
Safety guard is equipped with above axis.
5. simulated machine bearing shaft current damage test device according to claim 1, it is characterised in that: the bearing is
Deep groove ball bearing.
6. simulated machine bearing shaft current damage test device according to claim 1, it is characterised in that: the driving dress
It is set to variable-frequency motor.
7. simulated machine bearing shaft current damage test device according to claim 6, it is characterised in that: the variable-frequency electric
Cushion block is equipped between machine and pedestal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610039716.1A CN105486506B (en) | 2016-01-21 | 2016-01-21 | A kind of simulated machine bearing shaft current damage test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610039716.1A CN105486506B (en) | 2016-01-21 | 2016-01-21 | A kind of simulated machine bearing shaft current damage test device |
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| CN105486506A CN105486506A (en) | 2016-04-13 |
| CN105486506B true CN105486506B (en) | 2019-03-26 |
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| CN201610039716.1A Active CN105486506B (en) | 2016-01-21 | 2016-01-21 | A kind of simulated machine bearing shaft current damage test device |
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Families Citing this family (14)
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| CN105067667B (en) * | 2015-07-28 | 2017-12-12 | 湖北师范学院 | A kind of asynchronous motor bearing damage monitoring system |
| CN107907334A (en) * | 2017-12-13 | 2018-04-13 | 浙江工业大学 | The analog platform that shaft current influences dynamo bearing performance degradation |
| CN108168885A (en) * | 2017-12-13 | 2018-06-15 | 浙江工业大学 | Shaft current is to the analog platform of wind power generating set bearing performance degradation effects |
| CN110187273B (en) * | 2019-05-31 | 2021-10-15 | 合肥巨一动力系统有限公司 | Method for testing bearing electric corrosion risk of variable-frequency control alternating-current motor |
| CN110823568A (en) * | 2019-09-29 | 2020-02-21 | 深圳精匠云创科技有限公司 | Bearing fault detection device and detection method |
| CN110823569A (en) * | 2019-09-29 | 2020-02-21 | 深圳精匠云创科技有限公司 | Bearing fault detection method |
| CN112748059B (en) * | 2019-10-31 | 2022-11-25 | 中车株洲电力机车研究所有限公司 | Motor bearing electric corrosion life test platform |
| CN110823572A (en) * | 2019-11-13 | 2020-02-21 | 上海理工大学 | Momentum wheel bearing fault research test device capable of simulating multiple working conditions |
| CN112763870A (en) * | 2020-12-29 | 2021-05-07 | 河南科技大学 | Bearing breakdown voltage testing method and device |
| CN113405797A (en) * | 2021-07-20 | 2021-09-17 | 人本股份有限公司 | Testing device for motor bearing |
| CN113899685B (en) * | 2021-09-29 | 2023-10-27 | 北京交通大学 | Electric erosion damage test device suitable for multi-model bearing |
| CN113984386A (en) * | 2021-10-25 | 2022-01-28 | 中车永济电机有限公司 | Insulation performance testing machine for evaluating anti-corrosion capability of bearing structure |
| CN114217223A (en) * | 2021-11-26 | 2022-03-22 | 佛山科学技术学院 | Test platform for simulating current damage of insulating bearing shaft of industrial variable frequency motor |
| CN114485977A (en) * | 2021-12-29 | 2022-05-13 | 中车永济电机有限公司 | Simulation device and method for measuring temperature distribution of motor bearing |
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| CN105486506A (en) | 2016-04-13 |
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