SE447010B - Method and device for roll bearing lubrication monitoring - Google Patents
Method and device for roll bearing lubrication monitoringInfo
- Publication number
- SE447010B SE447010B SE8402451A SE8402451A SE447010B SE 447010 B SE447010 B SE 447010B SE 8402451 A SE8402451 A SE 8402451A SE 8402451 A SE8402451 A SE 8402451A SE 447010 B SE447010 B SE 447010B
- Authority
- SE
- Sweden
- Prior art keywords
- bearing
- roller
- roller bodies
- electrically conductive
- electrically
- Prior art date
Links
- 238000005461 lubrication Methods 0.000 title claims abstract description 7
- 238000000034 method Methods 0.000 title claims abstract 7
- 238000012544 monitoring process Methods 0.000 title claims abstract 4
- 238000005096 rolling process Methods 0.000 claims abstract description 10
- 239000003990 capacitor Substances 0.000 claims description 11
- 230000001050 lubricating effect Effects 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 4
- 230000001939 inductive effect Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/38—Ball cages
- F16C33/44—Selection of substances
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2202/00—Solid materials defined by their properties
- F16C2202/30—Electric properties; Magnetic properties
- F16C2202/32—Conductivity
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
15 20 25 30 35 447 010 2 Det i fig 1 partiellt visade rullningslagret har rullkroppar 1, t ex kullagerkulor, som rullar på lagerbanor på en yttre lagerring 2 samt en inre lagerring 3, vilka således bildar genom rullkropparna l inbördes rörliga delar. För styrning av rullkropparna l är på konventionellt sätt en ringformad rullkropps- bållare 4 anordnad, vilken har urtag för rullkropparna l. Rullkroppshållarens 4 till rullkropparna l angrän- sande partier är utformade elektriskt ledande och med en väsentligt större area än kontaktarean mellan rullkïopparna l och lagerbanorna på ytterringen 2 och innerringen 3. De elektriskt ledande, till rull- kropparna via en smörjfilm angränsande partierna kan alternativt vara utformade på en separat, från rull- kroppshållaren skild, men rullkropparna åtföljande kropp. The rolling bearing partially shown in Fig. 1 has roller bodies 1, for example ball bearing balls, which roll on bearing tracks on an outer bearing ring 2 and an inner bearing ring 3, which thus form mutually movable parts through the roller bodies 1. For guiding the roller bodies 1, an annular roller body ballast 4 is arranged in a conventional manner, which has recesses for the roller bodies 1. The portions of the roller body holder 4 adjacent to the roller bodies 1 are designed to be electrically conductive and with a substantially larger area than the contact area between the roller tracks 1 and the bearing tracks 1. on the outer ring 2 and the inner ring 3. The electrically conductive portions adjoining the roller bodies via a lubricating film may alternatively be formed on a separate body, separate from the roller body holder, but accompanying the roller bodies.
Hela rullkroppshållaren 4 eller nämnda alternativa kropp kan bestå av ett elektriskt ledande material, t ex metall eller en elektriskt ledande plast, så att nämnda elektriskt ledande partier är elektriskt förbundna inbördes.The entire roller body holder 4 or said alternative body may consist of an electrically conductive material, for example metal or an electrically conductive plastic, so that said electrically conductive portions are electrically connected to each other.
Enligt ett föredraget utförande är emellertid de elektriskt ledande partierna inbördes elektriskt sammankopplade i två eller flera grupper, vilket kan åstadkommas genom att rullkroppshållaren 4 eller nämnda alternativa kropp består av två eller flera samman- hängande, var för sig elektriskt ledande delar, som är sammanhållna av elektriskt isolerande delar. De elektriskt ledande delarna kan härvid utgöras av metall eller en ledande plast, medan de elektriskt isolerande delarna kan bestå av en isolerande plast. Ett exempel på en sådan rullkroppshållare 4 är visat i fig 3, där rullkroppshållaren 4 består av två elektriskt ledande delar 5 och 6, vilka är skilda åt av två elektriskt isolerande delar 7 och 8. De ledande delarna 5 och 6 upptar huvudparten av rullkroppshållarens 4 omkrets och innehåller samtliga urtag för rullkropparna l.According to a preferred embodiment, however, the electrically conductive portions are electrically interconnected in two or more groups, which can be achieved by the roller body holder 4 or said alternative body consisting of two or more interconnected, separately electrically conductive parts, which are held together by electrically insulating parts. The electrically conductive parts can in this case be made of metal or a conductive plastic, while the electrically insulating parts can consist of an insulating plastic. An example of such a roller body holder 4 is shown in Fig. 3, where the roller body holder 4 consists of two electrically conductive parts 5 and 6, which are separated by two electrically insulating parts 7 and 8. The conductive parts 5 and 6 occupy the main part of the roller body holder 4 circumference and contains all the recesses for the roller bodies l.
L :. *' 'Sfffi rr n Pool: QUA m l- » -_ Ja., 10 15 20 25 30 35 __.__.__ -_.__..._. . 447 010 3 Enligt en utföringsform av uppfinningen kan de ledande delarna 5 och 6 vara elektriskt förbundna med varandra via en spole 9, vilken såsom visat i fig 2 kan vara lindad runt yttersidan av rullkropps- hàllaren 4 i utrymmet mellan rullkropparna l för in- duktiv koppling till exempelvis en utanförliggande spole 10 (se fig 4).L:. * '' Sff fi rr n Pool: QUA m l- »-_ Ja., 10 15 20 25 30 35 __.__.__ -_.__..._. . According to an embodiment of the invention, the conductive parts 5 and 6 can be electrically connected to each other via a coil 9, which as shown in Fig. 2 can be wound around the outside of the roller body holder 4 in the space between the roller bodies 1 for inductive connection to, for example, an external coil 10 (see Fig. 4).
Det i fig 4 visade elektriska kretsschemat avser en utföringsform av anordningen enligt föreliggande uppfinning som utnyttjar rullkroppshållaren enligt fig 2 och 3. Samma hänvisningsbeteckningar som i fig 1-3 utnyttjas i fig 4. Spolen 10 är inkopplad i en krets med en växelströmskälla ll och en detektor 12, medelst vilken tillståndet hos en smörjfilm i rull- ningslagret skall övervakas genom bestämning av elektris- ka parametrar hos en mätsignal, som alstras av generatorn ll och via spolen 10 överföres kontaktlöst på induk- tivt sätt till spolen 9, som är ansluten mellan de ledande delarna 5 och 6 hos rullkroppshâllaren 4.The electrical circuit diagram shown in Fig. 4 relates to an embodiment of the device according to the present invention which uses the roller body holder according to Figs. 2 and 3. The same reference numerals as in Figs. 1-3 are used in Fig. 4. The coil 10 is connected in a circuit with an AC source 11 and a detector 12, by means of which the state of a lubricating film in the rolling bearing is to be monitored by determining electrical parameters of a measuring signal which is generated by the generator 11 and is transmitted contactlessly via the coil 10 to the coil 9, which is connected between the conductive parts 5 and 6 of the roller body holder 4.
Kondensatorer Cl, C2, C3 och C4 i fig 4 representerar kapacitansen mellan rullkroppshàllardelen 5, 6 och de i denna inrymda rullkropparna l. Kondensatorer C12, C22, C32 och C42 representerar kapacitansen mellan rullkropparna 1 och den yttre lagerríngen 2, medan kondensatorer C13, C23, C33 Och C43 representerar kapacitansen mellan rullkropparna l och den inre lager- ringen 3. Genom att enligt föreliggande uppfinning de elektriskt ledande, till rullkropparna 1 via smörj- filmen angränsande partierna hos rullkroppshållaren 4 (alternativt den separata kroppen) har väsentligt större area än kontaktarean mellan rullkroppar l och lager- banor på ytterringen 2 och innerringen 3 har kondensa- torerna Cl, C2, C3 och C4 väsentligt större kapacitans än kondensatorerna C12-C43. Därmed kan en förändring i kapacitansen hos någon av kondensatorerna C12-C43, dvs en förändring i smörjfilmens tillstånd mellan någon rullkropp l och endera lagerbanan återverka mätbart på signalparametrarna i primärkretsen 10, .,,._ POOR QUAnTY i l0 15 20 25 35 447 D10 4 11 och 12 och därmed övervakas mcdclsl detuktorn 12.Capacitors C1, C2, C3 and C4 in Fig. 4 represent the capacitance between the roller body holder part 5, 6 and the roller bodies 1 housed therein. Capacitors C12, C22, C32 and C42 represent the capacitance between the roller bodies 1 and the outer bearing ring 2, while capacitors C13, C23 , C33 and C43 represent the capacitance between the roller bodies 1 and the inner bearing ring 3. According to the present invention, the electrically conductive portions of the roller body holder (alternatively the separate body) adjacent to the roller bodies 1 via the lubricating film have a substantially larger area than the contact area. between roller bodies 1 and bearing tracks on the outer ring 2 and the inner ring 3, the capacitors C1, C2, C3 and C4 have significantly greater capacitance than the capacitors C12-C43. Thus, a change in the capacitance of any of the capacitors C12-C43, i.e. a change in the state of the lubricating film between any roller body 1 and either bearing web, can have a measurable effect on the signal parameters in the primary circuit 10, ._ ._ POOR QUANTY i 10 15 20 25 35 447 D10 4 11 and 12 and thus the mcdclsl detector 12 is monitored.
Detekteringen och mätningen kan således sägas utföras på kedjor, som består av rullkroppshållare - rullkroppar ~ rullbanor - rullkroppar - rullkroppshållare.The detection and measurement can thus be said to be performed on chains, which consist of roller body holders - roller bodies ~ roller tracks - roller bodies - roller body holders.
U Som ett alternativ till den beskrivna induktiva, kontaktlösa överföringen av mätsignalen till rullkropps- hållaren 4 kan en kapacitiv överföring ske, såsom visat i utföringsformen enligt fig 5. I detta fall är de elektriskt ledande, till rullkropparna l an- gränsande partierna hos rullkroppshâllaren 4 (eller den särskilda, rullkropparna åtföljande kroppen) samt- liga elektriskt förbundna inbördes samt med det ena belägget l3 i en kopplingskondensator, vars andra belägg 14 kan bestå av en fast, elektriskt ledande ring, som är placerad axiellt vid sidan av rullkropps- hållaren 4. Rullkroppshållaren 4 kan således utgöra nämnda ena belägg 13. Kapacitansen hos denna kopplings- kondensator 13, 14 skall enligt uppfinningen vara stor i jämförelse med kapacitanserna mellan de till _rullkropparna angränsande, ledande partierna hos rull- kroppshållaren 4 och rullkropparna 1. I utförings- formen enligt fig 5 är mätsignalsgeneratorn ll och detektorn 12 kopplade i serie mellan kopplingskonden- satorbelägget 14 och exempelvis den yttre lagerringen 2.As an alternative to the described inductive, contactless transmission of the measuring signal to the roller body holder 4, a capacitive transmission can take place, as shown in the embodiment according to Fig. 5. In this case the electrically conductive portions of the roller body holder 4 adjacent to the roller bodies 1 are (or the particular body accompanying the carcasses) all electrically connected to each other and to one liner 13 in a coupling capacitor, the other liner 14 of which may consist of a fixed, electrically conductive ring located axially next to the carcass holder 4. According to the invention, the capacitance of this coupling capacitor 13, 14 can be large in comparison with the capacitances between the conductive portions of the roller body holder 4 and the roller bodies 1 adjacent to the roller bodies. In the embodiment according to Fig. 5, the measurement signal generator 11 and the detector 12 are connected in series between the coupling capacitor the groove 14 and for example the outer bearing ring 2.
En mängd modifieringar av de ovan beskrivna utfö- ringsformerna är möjliga inom uppfinningens ram. Således kan rullkroppshållaren 4 förses med fler spolar än endast en, varvid den lämpligen uppdelas i flera ledande delar än två. Det inses också att detektorn 12 kan mäta vilken som helst elektriskt parameter i sin krets som återspeglar en förändring hos någon av kondensatorerna c12-c34, avsen föränaring av smörjfnmstiustånaet mellan någon av rullkropparna 1 och endera rullbanan.A variety of modifications of the above-described embodiments are possible within the scope of the invention. Thus, the roller body holder 4 can be provided with more coils than only one, it being suitably divided into more conductive parts than two. It will also be appreciated that the detector 12 may measure any electrical parameter in its circuit which reflects a change in any of the capacitors c12-c34, as a result of changing the lubrication state between any of the roller bodies 1 and either roller track.
POOR QUALITY _POOR QUALITY _
Claims (9)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8402451A SE447010B (en) | 1984-05-07 | 1984-05-07 | Method and device for roll bearing lubrication monitoring |
PCT/SE1985/000440 WO1987003053A1 (en) | 1984-05-07 | 1985-11-06 | Method and device for monitoring the lubricating film in a rolling bearing and cage therefor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8402451A SE447010B (en) | 1984-05-07 | 1984-05-07 | Method and device for roll bearing lubrication monitoring |
Publications (3)
Publication Number | Publication Date |
---|---|
SE8402451D0 SE8402451D0 (en) | 1984-05-07 |
SE8402451L SE8402451L (en) | 1985-11-08 |
SE447010B true SE447010B (en) | 1986-10-20 |
Family
ID=20355779
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8402451A SE447010B (en) | 1984-05-07 | 1984-05-07 | Method and device for roll bearing lubrication monitoring |
Country Status (2)
Country | Link |
---|---|
SE (1) | SE447010B (en) |
WO (1) | WO1987003053A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1024450C2 (en) * | 2003-10-03 | 2005-04-05 | Skf Ab | Method and device for measuring the thickness of a lubricating layer between surfaces. |
EP1701049A1 (en) * | 2005-03-07 | 2006-09-13 | Ab Skf | Method and system for detecting contacts in a hybrid bearing |
CN102782348A (en) * | 2010-03-01 | 2012-11-14 | 西门子公司 | Bearing module having a sensor device |
DK2484900T3 (en) | 2011-02-08 | 2017-05-22 | Siemens Ag | Method of lubricating at least one blade pitch bearing of a wind turbine |
JP6430704B2 (en) * | 2014-02-13 | 2018-11-28 | 株式会社ExH | Power supply system |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2025693A1 (en) * | 1970-05-21 | 1971-12-09 | Siemens Ag | Procedure for monitoring the operating condition of rolling bearings |
NL8103161A (en) * | 1981-06-30 | 1983-01-17 | Skf Ind Trading & Dev | MEASUREMENT SYSTEM FOR MEASURING THE VARIATION OF THE CAPACITIVE IMPEDANCE OF A BEARING-MOUNTED BEARING. |
-
1984
- 1984-05-07 SE SE8402451A patent/SE447010B/en not_active IP Right Cessation
-
1985
- 1985-11-06 WO PCT/SE1985/000440 patent/WO1987003053A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
WO1987003053A1 (en) | 1987-05-21 |
SE8402451D0 (en) | 1984-05-07 |
SE8402451L (en) | 1985-11-08 |
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