CN105758886A - Method for identifying ageing of mechanical parts - Google Patents
Method for identifying ageing of mechanical parts Download PDFInfo
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- CN105758886A CN105758886A CN201610122950.0A CN201610122950A CN105758886A CN 105758886 A CN105758886 A CN 105758886A CN 201610122950 A CN201610122950 A CN 201610122950A CN 105758886 A CN105758886 A CN 105758886A
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- 230000032683 aging Effects 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 17
- RDYMFSUJUZBWLH-UHFFFAOYSA-N endosulfan Chemical compound C12COS(=O)OCC2C2(Cl)C(Cl)=C(Cl)C1(Cl)C2(Cl)Cl RDYMFSUJUZBWLH-UHFFFAOYSA-N 0.000 claims description 2
- 230000003993 interaction Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000002474 experimental method Methods 0.000 abstract description 2
- 238000004364 calculation method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
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- 238000012546 transfer Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
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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
Abstract
The invention provides a method for identifying ageing of mechanical parts and especially relates to the method for identifying the ageing of kinematic pair parts. The quantitative relation between the theory difference and the temperature rise, kinematic pair temperature and environment temperature is acquired through hypothesis and experiment. The key problem of the prior art that the precision of threshold for identifying the ageing of parts is not enough is solved. The fault outage rate is reduced and the economic benefit is increased while the tamp basis is established for solving the worldwide problem of precise 'predictive maintenance'.
Description
Technical field
The invention belongs to a kind of method identifying that component of machine is aging, particularly relate to a kind of method identifying that kinematic pair part is aging, belong to engineering mechanical maintenance field.
Background technology
How perfect it is no matter plant equipment designs and manufacture, all can be aging along with life-time service, keeping and idle generation, and the disorderly closedown phenomenon thus resulted in happens occasionally, and loses huge.Mainly machine components ageing state of tracing it to its cause cannot be predicted and be caused.
Cannot being predicted this problem for part is aging, prior art provides a kind of method improving plant equipment maintainability, such as patent documentation ZL201510068431.6.The method is by drawing threshold value to the temperature survey of equipment effective site, mathematical statistics, and then realize the analysis to part ageing state and judgement, because the method is the ambient temperature using statistical principle to draw, so there is datum drift error problem.
Prior art additionally provides one simultaneously and ignores the change of kinematic pair surrounding enviroment, it is temperature rise benchmark with certain certain value, identifies, with what the machine design temperature upper limit was threshold value, the known method that part is aging, the method is simple to operate, identification is rapid, if any domestic (import) equipment design temperature higher limit be 60 DEG C (80 DEG C), but in actual identification part ageing process, some part before not up to higher limit, has occurred aging.Therefore, the method judges that part is aging and has that result is uncertain and Datum transfer problem.
All there is precision this problem not enough identifying that part is aging in existing two kinds of technology; it governs Predictive Maintenance and desirably realizes, and therefore in industrialization enterprise production process, is badly in need of a kind of can accurately identifying the method that part is aging; realize Predictive Maintenance, it is to avoid the generation of disorderly closedown phenomenon.
Summary of the invention
The present invention provides a kind of method identifying that component of machine is aging, can accurately identify that part is aging further, considerably reduces the disorderly closedown phenomenon often occurred in existing machinery equipment.
A kind of method identifying that component of machine is aging of the present invention, its technical scheme is as follows:
1, available point is chosen
Plant equipment is chosen kinematic pair temperature available point, ambient temperature available point；Described kinematic pair temperature available point be kinematic pair or its periphery in working order in without the point on the part of thermal interaction and little interference by environment；Described ambient temperature available point is the point not affected by kinematic pair heat exchange being under same environment with kinematic pair temperature available point；
2, temperature survey is carried out
Measure at the enterprising trip temperature of selected kinematic pair temperature available point and ambient temperature available point, obtain kinematic pair temperature available point temperature data TFiWith ambient temperature available point temperature data THi；
3, kinematic pair part aging threshold is generated
By theory difference with temperature rise TDiMathematical statistics generates kinematic pair part aging thresholdDi±kσ；The temperature rise of the described theoretical poor kinematic pair available point referred to temperature rise under desirable ambient temperature conditions；Described k σ is confidence probability characteristic value, and wherein k value is 1～6, it is preferable that k=3；
Wherein:
In formula (1),
TFiFor kinematic pair temperature available point temperature data；
THiFor ambient temperature available point temperature data；
A is ecotopia Temperature numerical, and its numerical value is chosen within the scope of machine operational temperature；
B is the unit ambient temperature influence coefficient 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, judge kinematic pair part is aging
WhenDi+kσ≧TDi≧DiDuring-k σ, if random fluctuation, it was shown that kinematic pair part time job is stable, if there are unusual fluctuations, it was shown that kinematic pair part time job is unstable, will search reason in time and take corresponding measure；
Work as TDi≧DiDuring+k σ, it was shown that part has occurred aging, remind and take corresponding measure；
Work as TDi≦DiDuring-k σ, remind and improve equipment operating environment.
The positive effect of the present invention is in that:
Draw the same temperature rise of theoretical difference, quantitative relation between kinematic pair temperature and ambient temperature by hypothesis, experiment, solve the precision identifying part aging threshold in prior art this key issue not enough.Reducing downtime rate, increasing economic benefit simultaneously, tamp basis for solving precision " Predictive Maintenance " this global problem.
Accompanying drawing explanation
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 exceedes high temperature threshold value and judges schematic diagram；
Fig. 7 is that kinematic pair A3 temperature data exceedes low temperature threshold and judges schematic diagram；
In figure, 1, kinematic pair temperature available point A1 temperature data curve；2, ambient temperature available point B1 temperature data curve；3, kinematic pair temperature available point A2 temperature data curve；4, ambient temperature available point B2 temperature data curve；5, kinematic pair temperature available point A3 temperature data curve；6, ambient temperature available point B3 temperature data curve.
Detailed description of the invention
The preferred embodiments of the present invention are provided below in conjunction with accompanying drawing:
Embodiment 1
1, available point is chosen
Certain Coal Transportation System production line known is that A, B two-way is standby mutually, and namely to run a road standby on a road.Some plant equipment kinematic pair temperature available point three is chosen on the A road run, is respectively as follows: certain motor shaft output bearing (ball) cover A1, certain model reductor bearing of input shaft transparent cover A2, certain sealing-tape machine driving cylinder input bearing (ball) cover A3；On B road, in like manner choose the ambient temperature available point corresponding with A road three, B1, B2, B3；
2, temperature survey is carried out
With reference to Fig. 1,2,3, respectively to available point A1, A2, A3, B1, B2, B3 carry out temperature survey and record data, obtain the temperature data T of kinematic pair temperature available pointFiTemperature data T with ambient temperature available pointHiSuch as following table:
3, kinematic pair part aging threshold is generated
With reference to Fig. 1,2,3, b=0.3, a=20 in this example, try to achieve each kinematic pair temperature available point difference with temperature rise T by formula (1)Di, such as following table:
With reference to Fig. 4,5,6,7, try to achieve each kinematic pair part aging threshold by formula (2) (3)Di± k σ, k=3 in this example, result of calculation is following table such as:
4, judge kinematic pair part is aging
1) whenDi+kσ≧TDi≧DiDuring-k σ, with reference to Fig. 4, if random fluctuation, it was shown that kinematic pair part time job is stable；With reference to Fig. 5, if unusual fluctuations occur, it was shown that kinematic pair part time job is unstable, reason to be searched in time and take corresponding measure；
Continuous four measurement data of kinematic pair temperature available point A1 and correlation calculation result such as following table:
With reference to Fig. 5, by result of calculation it can be seen that this kinematic pair theory difference is with temperature rise TDiTend to threshold value 16.76 DEG C, namely present continuous warming trend, therefore judge that this motor shaft output bearing (ball) cover kinematic pair part has aging tendency, remind related personnel to note.When not overhauling this motor shaft output bearing (ball) cover, this motor works after two working days, and axle journal ruptures；
2) T is worked asDi≧DiDuring+k σ, it was shown that part has occurred aging prompting to take corresponding measure；
With reference to Fig. 6, kinematic pair temperature certain measurement data of available point A2 and correlation calculation result are as follows:
By result of calculation it can be seen that this kinematic pair theory difference is with temperature rise TDiWell beyond threshold value 21.28 DEG C, it is judged that this reductor bearing of input shaft transparent cover kinematic pair part is aging.This equipment is disassembled by related personnel, finds that this reductor power shaft transparent cover has occurred obvious slight crack by nondestructive inspection；
3) T is worked asDi≦DiDuring-k σ, remind and improve equipment operating environment.
With reference to Fig. 7, kinematic pair temperature certain measurement data of available point A3 and correlation calculation result are as follows:
By result of calculation it can be seen that this kinematic pair theory difference is with temperature rise TDiSlightly below threshold value 6.80 DEG C, point out and improve equipment operating environment.Checking and find, this equipment device of keeping out wind and rain damages, and after reparation, data recover normal.
Beneficial effect:
As example; the present invention by using over one year and repeatedly accurately judging that the result that part is aging proves on this electric power plant coal transportation production line; this do not introduce any resource, do not disassemble, without the pre-buried aging technology of identification part; not only obtain the direct economic benefit that downtime rate decline is near partly, ton coal maintenance cost saves nearly twenty percent, manage also by inside and outside portion of strengthening enterprise and obtain indirect economic effect and social benefit with coordination.
Disclosed above it is only one preferred embodiment of the present invention, certainly can not limit the interest field of the present invention, the equivalent variations therefore made according to the claims in the present invention with this, still belong to the scope that the present invention contains.
Claims (1)
1. identify the method that component of machine is aging, comprise the following steps:
1) available point is chosen
Plant equipment is chosen kinematic pair temperature available point, ambient temperature available point；Described kinematic pair temperature available point be kinematic pair or its periphery in working order in without the point on the part of thermal interaction and little interference by environment；Described ambient temperature available point is the point not affected by kinematic pair heat exchange being under same environment with kinematic pair temperature available point；
2) temperature survey is carried out
Measure at the enterprising trip temperature of selected kinematic pair temperature available point and ambient temperature available point, obtain kinematic pair temperature available point temperature data TFiWith ambient temperature available point temperature data THi；
3) kinematic pair part aging threshold is generated
By theory difference with temperature rise TDiMathematical statistics generates kinematic pair part aging thresholdDi±kσ；The temperature rise of the described theoretical poor kinematic pair available point referred to temperature rise under desirable ambient temperature conditions；Described k σ is confidence probability characteristic value, and wherein k value is 1～6, it is preferable that k=3；
Wherein:
In formula (1),
TFiFor kinematic pair temperature available point temperature data；
THiFor ambient temperature available point temperature data；
A is ecotopia Temperature numerical, and its numerical value is chosen within the scope of machine operational temperature；
B is the unit ambient temperature influence coefficient 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) judge kinematic pair part is aging
WhenDi+kσ≧TDi≧DiDuring-k σ, if random fluctuation, it was shown that kinematic pair part time job is stable, if there are unusual fluctuations, it was shown that kinematic pair part time job is unstable, will search reason in time and take corresponding measure；
Work as TDi≧DiDuring+k σ, it was shown that part has occurred aging, remind and take corresponding measure；
Work as TDi≦DiDuring-k σ, remind and improve equipment operating environment.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107091856A (en) * | 2017-06-28 | 2017-08-25 | 周建全 | It is a kind of to improve the quantitative change periodical repair method of plant equipment maintenanceability |
| CN109975005A (en) * | 2019-05-06 | 2019-07-05 | 周建全 | A kind of variate judges the method for early warning of mechanical equipment kinematic pair defect |
| WO2020042386A1 (en) * | 2018-08-31 | 2020-03-05 | 周建全 | Method for improving complexity of mechanical device maintenance system |
Citations (5)
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|---|---|---|---|---|
| JPH04215047A (en) * | 1990-02-16 | 1992-08-05 | Westinghouse Electric Corp <We> | Method for determining equivalent average temperature associated with temperature histeresis of apparatus |
| US20090287448A1 (en) * | 2005-07-30 | 2009-11-19 | James Brown | In on or Relating to Rotating Machines |
| CN103020378A (en) * | 2012-12-26 | 2013-04-03 | 吉林大学 | Reliability comprehensive design method of three kinds of functional parts |
| CN104614397A (en) * | 2015-02-10 | 2015-05-13 | 孙继武 | 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 |
-
2016
- 2016-03-04 CN CN201610122950.0A patent/CN105758886B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04215047A (en) * | 1990-02-16 | 1992-08-05 | Westinghouse Electric Corp <We> | Method for determining equivalent average temperature associated with temperature histeresis of apparatus |
| US20090287448A1 (en) * | 2005-07-30 | 2009-11-19 | James Brown | In on or Relating to Rotating Machines |
| CN103020378A (en) * | 2012-12-26 | 2013-04-03 | 吉林大学 | Reliability comprehensive design method of three kinds of functional parts |
| CN104614397A (en) * | 2015-02-10 | 2015-05-13 | 孙继武 | 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 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107091856A (en) * | 2017-06-28 | 2017-08-25 | 周建全 | It is a kind of to improve the quantitative change periodical repair method of plant equipment maintenanceability |
| CN107091856B (en) * | 2017-06-28 | 2019-09-17 | 周建全 | A kind of quantitative change periodical repair method improving mechanical equipment maintenanceability |
| WO2020042386A1 (en) * | 2018-08-31 | 2020-03-05 | 周建全 | Method for improving complexity of mechanical device maintenance system |
| CN109975005A (en) * | 2019-05-06 | 2019-07-05 | 周建全 | A kind of variate judges the method for early warning of mechanical equipment kinematic pair defect |
| 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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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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