CN105758886B - A method of identification component of machine aging - Google Patents
A method of identification component of machine aging Download PDFInfo
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- CN105758886B CN105758886B CN201610122950.0A CN201610122950A CN105758886B CN 105758886 B CN105758886 B CN 105758886B CN 201610122950 A CN201610122950 A CN 201610122950A CN 105758886 B CN105758886 B CN 105758886B
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- 230000032683 aging Effects 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000009529 body temperature measurement Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
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- 239000003638 chemical reducing agent Substances 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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Abstract
The present invention provides a kind of method for identifying component of machine aging, a kind of more particularly to method for identifying the aging of kinematic pair part, the quantitative relation between the same temperature rise of theoretical difference, kinematic pair temperature and environment temperature is obtained by hypothesis, experiment, is solved and is identified this insufficient critical issue of the precision of part aging threshold in the prior art.It reducing downtime rate, increasing economic benefit simultaneously, tamping basis to solve precision " Predictive Maintenance " this global problem.
Description
Technical field
The invention belongs to a kind of methods more particularly to a kind of identification kinematic pair part aging for identifying component of machine aging
Method, belong to engineering mechanical maintenance field.
Background technique
How perfect no matter mechanical equipment design and manufacture, all can with long-time service, keeping and it is idle aging occurs,
Therefore disorderly closedown phenomenon caused by happens occasionally, and loses huge.Tracing it to its cause mainly machine components ageing state can not be by
It predicts and causes.
This problem can not be predicted for part aging, the prior art provides a kind of improvement mechanical equipment maintenanceability
Method, such as patent document ZL201510068431.6.This method passes through the temperature measurement to equipment active component, mathematical statistics
It obtains threshold value, and then realizes the analysis and judgement to part ageing state, because this method is obtained with statistical principle
Environment temperature, so there is datum drift error.
The prior art additionally provide simultaneously one kind ignore kinematic pair surrounding enviroment variation, using certain certain value as temperature rise benchmark,
Using the machine design temperature upper limit as the known method of the identification part aging of threshold value, this method is easy to operate, identification is rapid, if any
Domestic (import) equipment design temperature upper limit value be 60 DEG C (80 DEG C), but actually identification part ageing process in, Mou Xieling
Before not up to upper limit value aging has occurred for part.Therefore, this method judge that part aging is uncertain there are result and benchmark not
Coincidence error problem.
Existing two kinds of technologies there are problems that identifying the precision of part aging it is insufficient this, it restricts Predictive Maintenance
It is ideal to realize, therefore in industrialization enterprise production process, it is badly in need of a kind of method that can accurately identify part aging, realizes
Predictive Maintenance avoids the generation of disorderly closedown phenomenon.
Summary of the invention
The present invention provides a kind of method for identifying component of machine aging, can further accurately identify part aging, greatly
Ground reduces the disorderly closedown phenomenon often occurred in existing machinery equipment.
A kind of method identifying component of machine aging of the present invention, its technical solution is as follows:
1, available point is chosen
Kinematic pair temperature available point, environment temperature available point are chosen on mechanical equipment；The kinematic pair temperature available point
For the point on the part of kinematic pair or its periphery without thermal interaction and little interference by environment in working condition；The environment temperature
Spending available point is the point not influenced by kinematic pair heat exchange being under same environment with kinematic pair temperature available point；
2, temperature measurement is carried out
It is measured in the selected enterprising trip temperature of kinematic pair temperature available point and environment temperature available point, obtains kinematic pair temperature
Spend available point temperature data TFiWith environment temperature available point temperature data THi；
3, kinematic pair part aging threshold is generated
By theoretical difference with temperature rise TDiMathematical statistics generates kinematic pair part aging thresholdDi±kσ；The theoretical same temperature rise of difference
Refer to the temperature rise of the kinematic pair available point under ideal ambient temperature conditions；The k σ is fiducial probability characteristic value, wherein k value
It is 1~6, preferably k=3；
Wherein:
In formula (1),
TFiFor kinematic pair temperature available point temperature data；
THiFor environment temperature available point temperature data；
A is ecotopia temperature value, and numerical value is chosen within the scope of machine operational temperature；
B is influence coefficient of the unit environment temperature to kinematic pair temperature rise, and value is 0 <b≤0.5；
In formula (2), formula (3):
I is natural number；
N is kinematic pair temperature available point temperature data number of samples；
4, kinematic pair part aging is judged
WhenDi +kσ≧TDi≧DiWhen-k σ, if random fluctuation, show that kinematic pair part time job is stable, if occurring
Unusual fluctuations, show kinematic pair part time job be it is unstable, to search reason in time and take corresponding measure；
Work as TDi≧Di When+k σ, show that aging has occurred for part, corresponding measure is taken in prompting；
Work as TDi≦DiWhen-k σ, reminding improves equipment operating environment.
The positive effect of the present invention is:
The quantitative relation between the same temperature rise of theoretical difference, kinematic pair temperature and environment temperature is obtained by hypothesis, experiment, is solved
This insufficient critical issue of the precision of part aging threshold is identified in the prior art.It reducing downtime rate, increasing
Economic benefit has tamped basis simultaneously, to solve precision " Predictive Maintenance " this global problem.
Detailed description of the invention
Fig. 1 is kinematic pair A1 temperature data schematic diagram；
Fig. 2 is kinematic pair A2 temperature data schematic diagram；
Fig. 3 is kinematic pair A3 temperature data schematic diagram；
Fig. 4 is kinematic pair A1 temperature data random fluctuation schematic diagram；
Fig. 5 is kinematic pair A1 temperature data unusual fluctuations schematic diagram；
Fig. 6 is that kinematic pair A2 temperature data is more than that high temperature threshold value judges schematic diagram；
Fig. 7 is that kinematic pair A3 temperature data is more than that low temperature threshold judges schematic diagram；
In figure, 1, kinematic pair temperature available point A1 temperature data curve；2, environment temperature available point B1 temperature data curve；
3, kinematic pair temperature available point A2 temperature data curve；4, environment temperature available point B2 temperature data curve；5, kinematic pair temperature
Available point A3 temperature data curve；6, environment temperature available point B3 temperature data curve.
Specific embodiment
The preferred embodiment of the present invention is provided with reference to the accompanying drawing:
Embodiment 1
1, available point is chosen
Certain known Coal Transportation System production line is that A, B two-way are mutually standby, i.e., runs all the way spare all the way.On the road A of operation
It is upper to choose certain mechanical equipment kinematic pair temperature available point three, it is respectively as follows: certain motor shaft output bearing (ball) cover A1, certain model
Speed reducer bearing of input shaft transparent cover A2, certain sealing-tape machine drive roller input terminal bearing (ball) cover A3；Similarly chosen and the road A on the road B
Corresponding environment temperature available point three, B1, B2, B3；
2, temperature measurement is carried out
Referring to Fig.1,2,3, are carried out by temperature and measures and records data by available point A1, A2, A3, B1, B2, B3 respectively, is obtained
The temperature data T of kinematic pair temperature available pointFiWith the temperature data T of environment temperature available pointHiIt is as follows:
3, kinematic pair part aging threshold is generated
Referring to Fig.1,2,3, b=0.3 in this example, each kinematic pair temperature available point difference equality of temperature is acquired by formula (1) in a=20
Rise TDi, it is as follows:
Referring to Fig. 4,5,6,7, each kinematic pair part aging threshold is acquired by formula (2) (3)Di± k σ, k=3 in this example,
Calculated result is as follows:
4, kinematic pair part aging is judged
1) whenDi +kσ≧TDi≧DiWhen-k σ, show that kinematic pair part time job is steady if random fluctuation referring to Fig. 4
Fixed；Referring to Fig. 5, if there are unusual fluctuations, show kinematic pair part time job be it is unstable, to search reason in time and take
Corresponding measure；
Continuous four measurement data of kinematic pair temperature available point A1 and correlation calculation result are as follows:
Referring to Fig. 5, by calculated result it is found that the theoretical difference of the kinematic pair is the same as temperature rise TDiTend to 16.76 DEG C of threshold value, that is, presents
Continuous warming trend out, therefore judge that the motor shaft output bearing (ball) cover kinematic pair part has aging tendency, remind relevant people
Member pays attention to.In the case where not overhauling the motor shaft output bearing (ball) cover, which worked after two working days, and axle journal is disconnected
It splits；
2) work as TDi≧DiWhen+k σ, show that part has occurred aging prompting and taken corresponding measure；
Referring to Fig. 6, kinematic pair certain measurement data of temperature available point A2 and correlation calculation result are as follows:
By calculated result it is found that the theoretical difference of the kinematic pair is the same as temperature rise TDiWell beyond 21.28 DEG C of threshold value, the speed reducer is judged
The aging of bearing of input shaft transparent cover kinematic pair part.Related personnel disassembles the equipment, finds that this subtracts by nondestructive inspection
Has there is obvious slight crack in fast machine input shaft transparent cover；
3) work as TDi≦DiWhen-k σ, reminding improves equipment operating environment.
Referring to Fig. 7, kinematic pair certain measurement data of temperature available point A3 and correlation calculation result are as follows:
By calculated result it is found that the theoretical difference of the kinematic pair is the same as temperature rise TDiSlightly below 6.80 DEG C of threshold value, points out improvement and sets
Standby running environment.Check discovery, which keeps out wind and rain device damage, and after reparation, data restore normal.
The utility model has the advantages that
As example, the present invention by over one year on the electric power plant coal transportation production line using with repeatedly accurately judge part
Aging the results show that this do not introduce any resource, do not disassemble, without pre-buried identification part aging technology, not only obtain therefore
The direct economic benefit of nearly twenty percent is saved in barrier outage rate decline closely half, ton coal maintenance cost, also by strengthening the inside and outside portion's management of enterprise
Indirect economic effect and social benefit are obtained with coordination.
It is disclosed above to be only a preferred embodiment of the present invention, the right model of the present invention cannot be limited with this certainly
It encloses, therefore equivalent changes made in accordance with the claims of the present invention, is still within the scope of the present invention.
Claims (1)
1. a kind of method for identifying component of machine aging, comprising the following steps:
1) available point is chosen
Kinematic pair temperature available point, environment temperature available point are chosen on mechanical equipment；The kinematic pair temperature available point is fortune
Point on part of dynamic secondary or its periphery without thermal interaction and little interference by environment in working condition；The environment temperature has
Effect point is the point not influenced by kinematic pair heat exchange being under same environment with kinematic pair temperature available point；
2) temperature measurement is carried out
It is measured in the selected enterprising trip temperature of kinematic pair temperature available point and environment temperature available point, obtaining kinematic pair temperature has
Effect point temperature data TFiWith environment temperature available point temperature data THi；
3) kinematic pair part aging threshold is generated
By theoretical difference with temperature rise TDiMathematical statistics generates kinematic pair part aging thresholdDi±kσ；The theoretical difference refers to temperature rise
The temperature rise of kinematic pair available point under ideal ambient temperature conditions；The k σ is fiducial probability characteristic value, and wherein k value is 1
~6；
Wherein:
In formula (1),
TFiFor kinematic pair temperature available point temperature data；
THiFor environment temperature available point temperature data；
A is ecotopia temperature value, and numerical value is chosen within the scope of machine operational temperature；
B is influence coefficient of the unit environment temperature to kinematic pair temperature rise, and value is 0 <b≤0.5；
In formula (2), formula (3):
I is natural number；
N is kinematic pair temperature available point temperature data number of samples；
4) kinematic pair part aging is judged
WhenDi +kσ>TDi>DiWhen-k σ, if random fluctuation, show that kinematic pair part time job is stable, if there is extraordinary wave
It is dynamic, show kinematic pair part time job be it is unstable, to search reason in time and take corresponding measure；
Work as TDi≧Di When+k σ, show that aging has occurred for part, corresponding measure is taken in prompting；
Work as TDi<DiWhen-k σ, reminding improves equipment operating environment.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107091856B (en) * | 2017-06-28 | 2019-09-17 | 周建全 | A kind of quantitative change periodical repair method improving mechanical equipment maintenanceability |
| CN109101753B (en) * | 2018-08-31 | 2023-06-27 | 周建全 | Method for improving complexity of mechanical equipment overhaul system |
| CN109975005B (en) * | 2019-05-06 | 2020-08-07 | 周建全 | Early warning method for judging defect of kinematic pair of mechanical equipment by variable value |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0443260A1 (en) * | 1990-02-16 | 1991-08-28 | Westinghouse Electric Corporation | Method for determining an equivalent average temperature associated with the thermal history of equipment |
| GB2428844A (en) * | 2005-07-30 | 2007-02-07 | Siemens Ind Turbomachinery Ltd | Rotating machines |
| CN103020378A (en) * | 2012-12-26 | 2013-04-03 | 吉林大学 | Reliability comprehensive design method of three kinds of functional parts |
| CN104614397B (en) * | 2015-02-10 | 2017-02-22 | 吉林省拉霏英科技有限公司 | Method for improving maintainability of mechanical device |
| CN104965465A (en) * | 2015-07-08 | 2015-10-07 | 福建唐力电力设备有限公司 | Engineering machinery intelligent system and realization method |
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Effective date of registration: 20161207 Address after: 130022 Jilin province Changchun City Jingyue Development Zone CITIC City residential eight first unit 4 Building Room 907 Applicant after: Jilin Province, the British pull Fei Technology Co.,Ltd. Address before: College of mechanical engineering Changchun Institute of Technology No. 395 Jilin province 130022 Changchun city wide flat road Applicant before: Sun Jiwu |
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Effective date of registration: 20231116 Address after: No. 4053S, Unit 0, Building A and Building B, Phase 1, Changchun Wuzhou International Plaza, Jingyue Development Zone, Changchun City, Jilin Province, 130000 Patentee after: Jilin Province Yipisi Automation Technology Co.,Ltd. Address before: Room 907, Unit 4, Building 1, Phase 8, CITIC City, Jingyue Development Zone, Changchun City, Jilin Province, 130022 Patentee before: Jilin Province, the British pull Fei Technology Co.,Ltd. |
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