WO2006042844A1 - Verfahren und einrichtung zur erkennung eines schadhaften lagers einer rotierend umlaufenden welle - Google Patents
Verfahren und einrichtung zur erkennung eines schadhaften lagers einer rotierend umlaufenden welle Download PDFInfo
- Publication number
- WO2006042844A1 WO2006042844A1 PCT/EP2005/055326 EP2005055326W WO2006042844A1 WO 2006042844 A1 WO2006042844 A1 WO 2006042844A1 EP 2005055326 W EP2005055326 W EP 2005055326W WO 2006042844 A1 WO2006042844 A1 WO 2006042844A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bearing
- rotational speed
- envelope
- motor
- shaft
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000004044 response Effects 0.000 claims abstract description 19
- 230000002950 deficient Effects 0.000 claims description 18
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 230000001276 controlling effect Effects 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000004590 computer program Methods 0.000 claims description 2
- 230000001131 transforming effect Effects 0.000 claims description 2
- 101100495769 Caenorhabditis elegans che-1 gene Proteins 0.000 claims 1
- 101150055539 HADH gene Proteins 0.000 claims 1
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 238000011156 evaluation Methods 0.000 description 5
- 230000009466 transformation Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Classifications
-
- 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
- G01M13/045—Acoustic or vibration analysis
Definitions
- the invention relates to a method and a device for detecting a defective bearing of a rotating revolving shaft.
- the motor according to FIG. 1 has two sides A and B, which are designated A and B in FIG.
- the motor comprises a motor shaft 1 supported by two bearings 4a and 4b and a housing 2.
- bearings 4a and 4b e.g. Rolling bearings serve.
- the motor For measuring the position, i. the angular position of the motor shaft with respect to a zero point and / or for measuring the rotational speed of the motor shaft, the motor has a position sensor 3, which is present in the form of a resolver in the example.
- the position sensor 3 outputs the position ⁇ of the motor shaft for controlling and / or regulating the motor to a control and / or regulating device of the motor.
- um ⁇ sums the motor still other elements, but since they are immaterial to the understanding of the invention, not shown in FIG.
- a vibration sensor 11 which measures the vibration of the engine, is mounted on the engine.
- the vibration sensor 11 forwards an oscillation signal S to an external evaluation unit 13, which is not part of the control and / or regulating device.
- an envelope is applied via the oscillation signal S, the envelope is Fourier-transformed, and the absolute frequency response of the envelope is determined. If the magnitude frequency response exceeds a limit value, a bearing damage is detected and an alarm signal AL is generated.
- the alarm signal AL is only generated during a longer time overrun of the limit value in order to avoid false alarms.
- the commercial method and the commercially available device for detecting a defective bearing has some
- a vibration sensor must be provided and, on the other hand, the external evaluation unit 13 is commercially required as a separate device which is not part of an already existing control or regulating device for controlling and / or regulating the motor.
- the above disadvantages make the above-described commercially practiced method and commercially available means for detecting a defective bearing expensive and expensive.
- the invention has for its object to provide a device and a method for detecting a defective bearing ei ⁇ ner rotating rotating shaft, in which no Schwingungssen- sensor is required for Erken ⁇ tion of a defective bearing of the shaft.
- This object is achieved by a method for detecting a defective bearing of a rotating rotating shaft wherein a rotational speed of the shaft is determined, - the alternating component of the rotational speed is determined,
- the envelope is transformed into the frequency domain and a magnitude frequency response of the envelope is determined, wherein the magnitude response is monitored for exceeding a limit and is detected when exceeding the limit on a defective bearing.
- this object is achieved by a device for Er ⁇ recognition of a defective bearing of a rotatingly rotating shaft, wherein the device comprises
- Means for determining a rotational speed of the shaft means for determining the alternating component of the rotational speed
- a first advantageous embodiment of the invention is characterized in that the shaft is designed as a motor shaft of a motor. Especially with motor shafts, bearing damage often occurs.
- a bearing passage frequency of the bearing is stored in a memory on a motor. This greatly simplifies the commissioning of the engine since the engine is e.g. a control and / or control device for controlling and / or controlling the
- the envelope of the alternating component of the rotational speed is determined, in ⁇ the alternating component is rectified and the rectified alternating component is low-pass filtered. As a result, a determination of the envelope is made possible in a particularly simple manner.
- the device according to the invention is used as a control and / or regulating device for
- Control and / or control of a motor is formed, since such a control and / or regulating device anyway for controlling and / or controlling the engine is present.
- An additional external evaluation unit for detecting bearing damage according to the prior art can thus be dispensed with.
- a computer program product e.g. in the form of a floppy disk, a hard disk, a compact disk, a flash card or in the form of another storage medium for the device according to the invention, containing code sections with which the method according to the invention can be carried out.
- FIG 3 shows an envelope and FIG 4 a magnitude response of the envelope.
- FIG. 2 the method according to the invention and the device according to the invention are shown in the form of an exemplary embodiment.
- the engine illustrated in FIG. 2 basically corresponds in its basic structure to the engine shown in FIG. 1 above. The same elements are therefore provided in FIG 2 with the same reference numerals, as in FIG 1.
- the wesentli che difference with respect to the motor according to FIG 1 dar ⁇ in that the motor according to FIG 2 no vibration sensor 11 according to FIG.
- the position signal ⁇ of the position sensor 3 indicating the position ⁇ of the motor shaft is used.
- the motor still includes other elements, which, however, since they are immaterial to the understanding of the invention, are not shown in FIG.
- the position ⁇ is measured by the position sensor 3 and provided to a differentiator 12 as an input variable.
- the differentiator 12 differentiates the position ⁇ according to time and carries out a multiplication by a factor 1 ⁇ 2 ⁇ , so that a rotational speed n of the motor shaft in the form of a rotational speed is output as the output variable of the differentiator 12.
- the rotational speed e.g. also present in the form of the rotational angular velocity.
- the rotational speed n is composed of a DC component n DC of the rotational speed and an AC component n AC of the rotational speed.
- the motor shaft has an effect on the uniformity of the rotation of the motor shaft.
- the vibrations generated by a damaged bearing are superimposed on the direct component n DC of the rotational speed n and produce a permanent alternating component n AC at the rotational speed n.
- the rotational speed n is high-pass filtered by means of a high-pass filter 5, and the alternating component n AC of the rotational speed n is determined as the output variable of the high-pass filter 5.
- an envelope of the AC component AC n h n is the rotational speed by means of a rectifying unit 6 of the AC component AC n rectified.
- a rectification in the rectification unit 6 can take place, for example, in that either the negative signal components of the alternating component n AC are suppressed (half-wave rectification) or else it can be rectified by calculating the amount of the alternating component n AC of the rotational speed.
- the rectified alternating component n AC of the rotational speed n is low-pass filtered by means of a low-pass filter 7, and thus the envelope h is determined as the output variable of the low-pass filter 7.
- the envelope h which results from the alternating component n AC of the rotational speed n, is shown by way of example.
- the cut-off frequency of the low-pass filter 7 is preferably selected such that the higher-frequency signal components of the alternating component n AC are suppressed.
- the envelope h is fed as input to a Fourier transformation unit 8. This transforms the envelope h by means of Fourier transformation in the frequency domain and determines the magnitude frequency response B of the envelope h.
- the Be ⁇ frequency response B is the amount of Fourier transform the envelope h over the frequency f.
- the magnitude frequency response B of the envelope h is used as output variable by the Fourier trans- formation unit 8 is output and supplied as an input quantity to a limit value detector 9, which, if the amount frequency range B exceeds a limit value, for example, exceeds Gl, recognizes a defective bearing and generates an alarm signal AL.
- the alarm signal AL is only generated when the limit value is exceeded over a longer period in order to avoid false alarms.
- the typical course of the magnitude frequency response B of the envelope h over the frequency f is shown by way of example.
- the limit indicator 9 can be designed so that it monitors only a single Grenz ⁇ value or monitors the exceeding of several limit values.
- the limit values Gi, G2, G3 and / or g. 4 In this case, a single bearing has several bearing passage frequencies, in some cases the monitoring of a single bearing passage frequency is sufficient to detect a bearing damage.
- the bearing passage frequencies fi and f 2 the bearing frequencies of the bearing 4a, and the bearing through frequencies f 3 and f 4
- the bearing passage frequencies of the bearing 4b and, for example, be used to monitor all four bearing passage frequencies of exceedance of a respectively associated limiting value Gi, G2, G3 and G4 über ⁇ , then both damage in the bearing 4a and damage in the bearing 4b is detected.
- the bearing passage frequencies are specific to each type of bearing and depend inter alia on the number of Wälz ⁇ body and the bearing geometry.
- the bearing clearance rates are usually given by the manufacturer of the bearing as a multiple of the speed. Alternatively, however, they can also be calculated using special programs provided, for example, by the manufacturer of the warehouse. If, instead of the position sensor 3, a rotary encoder which directly outputs a rotational speed as an output quantity is applied to the motor, the differentiator 12 can be dispensed with. The output signal of the rotary encoder is then provided directly as an input variable to the high-pass filter 5.
- the bearing passage frequencies fi, f 2 , f 3 and fq of a bearing can be stored particularly advantageously, for example as multiples of the rotational speed in a memory 10 (see FIG. 2) on the engine. This ensures that a control and / or regulating device for regulating and / or controlling the engine, which has access to the memory 10, can directly remove the bearing throughput frequencies from the engine.
- the device according to the invention is designed as a control and / or regulating device for controlling and / or regulating the motor, since such a control and / or regulating device is anyway provided for controlling and / or controlling the motor.
- An additional external evaluation unit 13 according to FIG. 1 for detecting a defective bearing according to the prior art can thus be dispensed with.
- the method according to the invention and the device according to the invention are, of course, not only for the detection of a defective bearing of a motor shaft but, more generally, also for the detection of a defective bearing in other rotating revolving shafts such as e.g. at waves of generators, is suitable.
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007536200A JP2008517260A (ja) | 2004-10-19 | 2005-10-18 | 回転する軸の損傷した軸受を検知するための方法および装置 |
DE112005002540T DE112005002540A5 (de) | 2004-10-19 | 2005-10-18 | Verfahren und Einrichtung zur Erkennung eines schadhaften Lagers einer rotierend umlaufenden Welle |
US11/577,544 US7743658B2 (en) | 2004-10-19 | 2005-10-18 | Method and device for identifying a damaged bearing of a rotating shaft |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004050897A DE102004050897A1 (de) | 2004-10-19 | 2004-10-19 | Verfahren und Einrichtung zur Erkennung eines schadhaften Lagers einer rotierend umlaufenden Welle |
DE102004050897.6 | 2004-10-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006042844A1 true WO2006042844A1 (de) | 2006-04-27 |
Family
ID=35447552
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2005/055326 WO2006042844A1 (de) | 2004-10-19 | 2005-10-18 | Verfahren und einrichtung zur erkennung eines schadhaften lagers einer rotierend umlaufenden welle |
Country Status (5)
Country | Link |
---|---|
US (1) | US7743658B2 (de) |
JP (1) | JP2008517260A (de) |
CN (1) | CN100592053C (de) |
DE (2) | DE102004050897A1 (de) |
WO (1) | WO2006042844A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018127056B4 (de) | 2018-10-30 | 2024-05-29 | Schaeffler Technologies AG & Co. KG | Verfahren und Einrichtung zur Detektion von infolge statischer Aufladung von rotierenden Maschinen- oder Anlagenteilen in einem Wälzlager oder Gleitlager auftretenden elektrischen Stromimpulsen |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE502008003106D1 (de) | 2008-06-02 | 2011-05-19 | Siemens Ag | Diagnoseverfahren für zumindest ein Kugellager, insbesondere für ein Schrägkugellager, korrespondierendes Diagnosesystem sowie Verwendung eines derartigen Diagnosesystems |
EP2244080A1 (de) * | 2009-04-23 | 2010-10-27 | Baumüller Reparaturwerk GmbH & Co. KG | Verfahren zur Zustandsüberwachung bei Lagern permanenterregter Synchronmaschinen sowie zugehörige Einrichtung zur Zustandsüberwachung |
DE102010005636A1 (de) * | 2010-01-25 | 2011-07-28 | Siemens Aktiengesellschaft, 80333 | Verfahren und Vorrichtung zur Beurteilung des Betriebsverhaltens eines Lagers |
GB2488805A (en) | 2011-03-09 | 2012-09-12 | Rolls Royce Plc | Shaft break detection |
CN102564759B (zh) * | 2011-12-26 | 2014-10-29 | 重庆大学 | 基于智能轴承的汽车后桥寿命预测系统 |
DE102015004845A1 (de) | 2015-04-16 | 2016-10-20 | Oerlikon Textile Gmbh & Co. Kg | Verfahren zur Überwachung einer Galette oder Führungsrolle |
CN105067667B (zh) * | 2015-07-28 | 2017-12-12 | 湖北师范学院 | 一种异步电动机轴承损伤监测系统 |
US10228305B2 (en) | 2016-01-18 | 2019-03-12 | Pratt & Whitney Canada Corp. | Shaft shear detection through shaft oscillation |
US10228304B2 (en) | 2016-01-18 | 2019-03-12 | Pratt & Whitney Canada Corp. | Shaft shear detection through shaft oscillation |
KR102036496B1 (ko) * | 2019-04-15 | 2019-10-25 | (주)니오메이트 | 공기조화기 송풍기용 베어링 이상 검출장치 |
Citations (1)
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---|---|---|---|---|
US5511422A (en) * | 1993-04-09 | 1996-04-30 | Monitoring Technology Corporation | Method and apparatus for analyzing and detecting faults in bearings and other rotating components that slip |
Family Cites Families (13)
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DD252102A3 (de) * | 1985-05-23 | 1987-12-09 | Zittau Ing Hochschule | Verfahren zur schadensdiagnose an waelz- und gleitlagern |
DE19702234A1 (de) * | 1997-01-23 | 1998-08-06 | Acida Gmbh Aachener Ct Fuer In | Verfahren zur Überwachung und Qualitätsbeurteilung von sich bewegenden und/oder rotierenden Maschinenteilen insbesondere von Maschinenlagern |
JPH1183686A (ja) * | 1997-09-01 | 1999-03-26 | Nippon Steel Corp | 機械設備の異常診断方法およびその装置 |
JPH11271181A (ja) * | 1998-01-22 | 1999-10-05 | Nippon Steel Corp | ころがり軸受の異常診断方法および装置 |
US6289735B1 (en) * | 1998-09-29 | 2001-09-18 | Reliance Electric Technologies, Llc | Machine diagnostic system and method for vibration analysis |
JP4120099B2 (ja) * | 1999-07-09 | 2008-07-16 | 日本精工株式会社 | 軸受の異常診断方法および異常診断装置 |
DE19938721A1 (de) * | 1999-08-16 | 2001-02-22 | Busch Dieter & Co Prueftech | Verfahren und Vorrichtung zum Ermitteln von Schäden an sich zyklisch bewegenden Maschinenelementen |
DE60139757D1 (de) * | 2000-12-01 | 2009-10-15 | Nsk Ltd | Wälzlagervorrichtung mit Sensor |
JP2002295464A (ja) * | 2001-03-30 | 2002-10-09 | Nsk Ltd | 転がり軸受ユニットの異常検出装置 |
JP3781410B2 (ja) * | 2001-11-28 | 2006-05-31 | 株式会社電業社機械製作所 | ジェットファン |
JP2003166907A (ja) * | 2001-11-29 | 2003-06-13 | Nsk Ltd | 転がり軸受装置のトルク検査方法及び装置 |
DE10228389B4 (de) * | 2002-04-13 | 2006-11-09 | I-For-T Gmbh | Schwingungssensor und Verfahren zur Zustandsüberwachung von rotierenden Bauteilen und Lagern |
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2004
- 2004-10-19 DE DE102004050897A patent/DE102004050897A1/de not_active Withdrawn
-
2005
- 2005-10-18 JP JP2007536200A patent/JP2008517260A/ja active Pending
- 2005-10-18 DE DE112005002540T patent/DE112005002540A5/de not_active Withdrawn
- 2005-10-18 WO PCT/EP2005/055326 patent/WO2006042844A1/de active Application Filing
- 2005-10-18 CN CN200580043214A patent/CN100592053C/zh not_active Expired - Fee Related
- 2005-10-18 US US11/577,544 patent/US7743658B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5511422A (en) * | 1993-04-09 | 1996-04-30 | Monitoring Technology Corporation | Method and apparatus for analyzing and detecting faults in bearings and other rotating components that slip |
Non-Patent Citations (1)
Title |
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GEROPP B: "HUELLKURVENANALYSE - VERFAHREN ZUR SCHADENSFRUEHERKENNUNG", January 1999, ANTRIEBSTECHNIK, VEREINIGTE FACHVERLAGE, MAINZ, DE, PAGE(S) 51-55, ISSN: 0722-8546, XP000800697 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018127056B4 (de) | 2018-10-30 | 2024-05-29 | Schaeffler Technologies AG & Co. KG | Verfahren und Einrichtung zur Detektion von infolge statischer Aufladung von rotierenden Maschinen- oder Anlagenteilen in einem Wälzlager oder Gleitlager auftretenden elektrischen Stromimpulsen |
Also Published As
Publication number | Publication date |
---|---|
US20080083280A1 (en) | 2008-04-10 |
JP2008517260A (ja) | 2008-05-22 |
DE102004050897A1 (de) | 2006-05-11 |
DE112005002540A5 (de) | 2007-10-04 |
CN100592053C (zh) | 2010-02-24 |
CN101080623A (zh) | 2007-11-28 |
US7743658B2 (en) | 2010-06-29 |
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