SIST EN 14865-2:2006
(Main)Railway applications - Axlebox lubricating greases - Part 2: Method to test the mechanical stability to cover vehicle speeds up to 200 km/h
Railway applications - Axlebox lubricating greases - Part 2: Method to test the mechanical stability to cover vehicle speeds up to 200 km/h
This European Standard specifies a test method and sets the acceptance criteria for the determination of the mechanical stability of lubricating greases intended for the lubrication of axlebox bearings according to EN 12081. In the test, impacts are applied to the lubricating grease so that only very stable lubricating greases will perform acceptably. The method is used in a discrimination process for finding lubricating greases of such mechanical stability that they are considered accepted lubricating greases for more extensive performance tests according to EN 12082.
For purposes of quality assurance and quality control, this test method is also used for batch testing of lubricating greases.
Bahnanwendungen - Schmierfette für Radsatzlager - Teil 2: Prüfverfahren für mechanische Stabilität bei Schienenfahrzeugen bis zu Geschwindigkeiten von 200 km/h
Diese Europäische Norm legt ein Prüfverfahren und die Abnahmekriterien für die Bestimmung der mechanischen Stabilität von Schmierfetten für die Schmierung von Radsatzlagern nach EN 12081 fest. Bei dieser Prüfung wird das Schmierfett einer definierten Stoßbelastung unterworfen, der nur sehr stabile Schmierfette standhalten und so die Anforderungen erfüllen. Das Verfahren wird in einem Auswahlprozess zur Ermittlung von Schmierstoffen verwendet, die aufgrund ihrer mechanischen Stabilität für umfassendere Funktionsprüfungen nach EN 12082 geeignet sind.
Dieses Prüfverfahren wird auch zu Qualitätssicherungs- und Qualitätsprüfzwecken für die Serienprüfung von Schmierfetten eingesetzt.
Applications ferroviaires - Graisses lubrifiantes pour boîtes d'essieux - Partie 2 : Méthode d'essai de stabilité mécanique pour des vitesses de véhicules allant jusqu'a 200 km/h
La présente Norme européenne spécifie une méthode d'essai et établit les criteres d'acceptation pour la détermination de la stabilité mécanique des graisses lubrifiantes des roulements de boîtes d'essieux conformément a l'EN 12081. Au cours de l'essai, il est appliqué des chocs a la graisse lubrifiante de sorte que seules les graisses lubrifiantes extremement stables présentent des performances acceptables. Cette méthode est utilisée dans un processus de discrimination qui permet de définir des graisses lubrifiantes ayant une stabilité mécanique telle qu'elles sont considérées etre des graisses lubrifiantes susceptibles de subir des essais de performance plus poussés, tels que définis dans l'EN 12082.
Pour les besoins de l'assurance de la qualité et de la maîtrise de la qualité, cette méthode d'essai est également utilisée pour les essais de lots de fabrication de graisses lubrifiantes.
Železniške naprave – Maziva za ležaje kolesnih dvojic – 2. del: Preskusna metoda za ugotavljanje mehanske stabilnosti pri vozilih za hitrosti do 200 km/h
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 14865-2:2006
01-maj-2006
Železniške naprave – Maziva za ležaje kolesnih dvojic – 2. del: Preskusna metoda
za ugotavljanje mehanske stabilnosti pri vozilih za hitrosti do 200 km/h
Railway applications - Axlebox lubricating greases - Part 2: Method to test the
mechanical stability to cover vehicle speeds up to 200 km/h
Bahnanwendungen - Schmierfette für Radsatzlager - Teil 2: Prüfverfahren für
mechanische Stabilität bei Schienenfahrzeugen bis zu Geschwindigkeiten von 200 km/h
Applications ferroviaires - Graisses lubrifiantes pour boîtes d'essieux - Partie 2 : Méthode
d'essai de stabilité mécanique pour des vitesses de véhicules allant jusqu'a 200 km/h
Ta slovenski standard je istoveten z: EN 14865-2:2006
ICS:
45.040 Materiali in deli za železniško Materials and components
tehniko for railway engineering
75.100 Maziva Lubricants, industrial oils and
related products
SIST EN 14865-2:2006 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 14865-2:2006
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SIST EN 14865-2:2006
EUROPEAN STANDARD
EN 14865-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2006
ICS 75.100
English Version
Railway applications - Axlebox lubricating greases - Part 2:
Method to test the mechanical stability to cover vehicle speeds
up to 200 km/h
Applications ferroviaires - Graisses lubrifiantes pour boîtes Bahnanwendungen - Schmierfette für Radsatzlager - Teil 2:
d'essieux - Partie 2 : Méthode d'essai de stabilité Prüfverfahren für mechanische Stabilität bei
mécanique pour des vitesses de véhicules allant jusqu'à Schienenfahrzeugen bis zu Geschwindigkeiten von 200
200 km/h km/h
This European Standard was approved by CEN on 9 January 2006.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14865-2:2006: E
worldwide for CEN national Members.
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SIST EN 14865-2:2006
EN 14865-2:2006 (E)
Contents page
Foreword .3
Introduction.4
1 Scope .5
2 Normative references .5
3 Terms and definitions.5
4 Testing principle .5
5 Reagents and materials.6
6 Apparatus .6
7 Sampling.6
8 Testing procedure.6
8.1 General .6
8.2 Preparation of the apparatus .6
8.3 Washing procedure.7
8.4 Assembly of the bearings.7
8.5 Volume and distribution of the test lubricating grease.7
8.6 Assembly of the box.7
8.7 Assembly of the machine.8
8.8 Calibrating the machine .8
8.9 Running the test.8
8.10 Dismantling the machine after testing .9
8.11 Disassembly of the bearings.9
9 Evaluation.9
9.1 Recording .9
9.2 Leakage .10
9.3 Penetration .10
10 Precision.10
10.1 General .10
10.2 Repeatability.10
10.3 Reproducibility.11
11 Test report .11
12 Other test rig .12
Annex A (normative) V2F test rig .13
Annex B (normative) Axlebox .14
Annex C (informative) Round Robin test .15
C.1 Result.15
C.2 Symbols in the Figures C.1 and C.2 .15
C.3 Test data distribution.15
Annex D (informative) Precision calculation examples.17
D.1 Repeatability example .17
D.2 Reproducibility example.17
Bibliography.18
2
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SIST EN 14865-2:2006
EN 14865-2:2006 (E)
Foreword
This European Standard (EN 14865-2:2006) has been prepared by Technical Committee CEN/TC 256
“Railway applications”, the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by September 2006, and conflicting national standards shall be
withdrawn at the latest by September 2006.
EN 14865 consists of the following parts, under the general title Railway applications — Axlebox lubricating
greases:
Part 1: Method to test the ability to lubricate
Part 2: Method to test the mechanical stability to cover vehicle speeds up to 200 km/h
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.
3
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SIST EN 14865-2:2006
EN 14865-2:2006 (E)
Introduction
A test method is standardized, which is referred to in EN 12081.
This European Standard standardizes a test method and acceptance criteria for the demand in EN 12081 for
testing the mechanical stability of axlebox lubricating greases. It addresses the issue of mechanical stability of
lubricating greases operating under severe conditions.
All lubricants have three main functions – to form a lubricating film that separates rolling elements and
raceways, to protect the bearings from corrosion and to give good longevity. For lubricating grease there is a
further demand: the product needs to be mechanically stable in use. Currently several common lubricating
grease shear stability tests are available to industry, but the procedure in this European Standard is the most
severe. It has been available for many years and it is used to discriminate between lubricating greases of
different stabilities.
4
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SIST EN 14865-2:2006
EN 14865-2:2006 (E)
1 Scope
This European Standard specifies a test method and sets the acceptance criteria for the determination of the
mechanical stability of lubricating greases intended for the lubrication of axlebox bearings according to
EN 12081. In the test, impacts are applied to the lubricating grease so that only very stable lubricating greases
will perform acceptably. The method is used in a discrimination process for finding lubricating greases of such
mechanical stability that they are considered accepted lubricating greases for more extensive performance
tests according to EN 12082.
For purposes of quality assurance and quality control, this test method is also used for batch testing of
lubricating greases.
2 Normative references
The following referenced documents are indispensable for the application of this European Standard. For
dated references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN ISO 868, Plastics and ebonite — Determination of indentation hardness by means of a durometer (Shore
hardness) (ISO 868:2003)
EN ISO 3170, Petroleum liquids — Manual sampling (ISO 3170:2004)
EN ISO 4259:1995, Petroleum products — Determination and application of precision data in relation to
methods of test (ISO 4259:1992/Cor 1:1993)
ISO 2137:1985, Petroleum products — Lubricating grease and petrolatum — Determination of cone
penetration
ISO 5725-6:1994, Accuracy (trueness and precision) of measurement methods and results — Part 6: Use in
practice of accuracy values
3 Terms and definitions
For the purposes of this European Standard, the following terms and definitions apply.
3.1
lubricating grease
semi-solid product consisting of a mixture of liquid lubricant and thickened with soaps or other thickeners, and
may also contain other ingredients, imparting special properties (additives)
3.2
lubricating grease mechanical stability
resistance to breakdown of the lubricating grease structure under shear, causing the product to become softer
3.3
lifting device
hoist, block and tackle suitably supported, a traverse or other device suitable to support and safely manoeuvre
the axlebox and its components
4 Testing principle
A typical type of railway axlebox with a labyrinth seal and two spherical roller bearings is packed with test
lubricating grease. The axlebox axle is first rotated for 72 h at 500 r/min (52,4 rad/s) while the axlebox is
subject to vibrational accelerations. The vibration is brought about by hitting the axlebox every second with a
5
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SIST EN 14865-2:2006
EN 14865-2:2006 (E)
hammer with a falling height of 4,5 mm. The second part of the test continues in the same way for another
72 h, but the rotational speed of the axle is increased to 1 000 r/min (104,7 rad/s). The weight of lubricating
grease lost from the axlebox is recorded as a measure of mechanical stability.
5 Reagents and materials
Use only reagents of recognised analytical grades (e.g. white spirit according to BS 245 specification).
1))))
6 Apparatus
The following V2F test rig and equipment are used in the test:
a) test rig as described in Annex A and detailed in Annex B;
b) lifting device suitable for supporting and manoeuvring the assembled axlebox (approximately 100 kg);
c) spatula;
d) balance;
e) thermocouple.
7 Sampling
The following measures shall be taken when taking samples:
a) unless otherwise specified, samples shall be taken in accordance with one of the procedures specified in
EN ISO 3170;
b) laboratory samples shall be examined for homogeneity before taking the test portion.
NOTE How lubricating grease samples are to be taken after the test procedure is described in 8.10;
c) samples shall be stored at a temperature between 0 °C and 30 °C, for at least 24 h, before use.
8 Testing procedure
8.1 General
The procedure is described assuming that the apparatus is disassembled. If this is not the case, then
disassemble the apparatus and bearings, as described in 8.10 and 8.11, before proceeding.
8.2 Preparation of the apparatus
Make sure that the test rig is earthed and that the electrical wiring is correct. When starting the machine,
carefully check that the eccentric cam rotates in the correct direction.
1) Information about suitable equipment is available from SKF Quality Technology Centre, A-4400 Steyr, Austria.
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EN 14865-2:2006 (E)
8.3 Washing procedure
All parts of the axlebox shall be washed and thoroughly dried before any running test is carried out. White
spirit or a similar non-aqueous solvent should be used for the washing and the parts may be dried using clean
and dry compressed air.
The bearings shall be disassembled before washing according to the method described in 8.11.
8.4 Assembly of the bearings
The rollers shall be placed into the pockets in the two cage halves, with the exception of 12 rollers, 6 from
each side of the bearing, i.e. 3 cage pockets are left empty on each side of each cage half to allow assembly.
The cage halves and the guide ring are then placed over the inner ring. The inner ring assembly is fitted into
the outer ring and swung out so that it is possible to press the remaining rollers into position.
8.5 Volume and distribution of the test lubricating grease
3
A total volume of 1 370 cm lubricating grease shall be used for the test and this volume of lubricating grease
3 3 3 3 3
is split up in 5 portions – 132 cm , 174 cm , 700 cm , 174 cm and 190 cm . These portions are to be
3
prepared to an accuracy of ± 0,5 cm .
If the density of the lubricating grease is known, the weight of the lubricating grease instead of the volume can
be used.
NOTE Previous trials have proven that following the specified volumes is essential for the accuracy of the testing.
8.6 Assembly of the box
The collar shall be pressed on the axle (Figure B.1, key 8). The first bearing (Figure B.1, key 6) is pressed on
and the spacing ring (Figure B.1, key 5) mounted.
3
The bearing is filled with 174 cm lubricating grease. This is done by applying the lubricating grease with a
suitable spatula. The outer ring is swung out and about half of the lubricating grease volume is worked
between the rollers. With the outer ring swung back into position, the rest of the lubricating grease is applied.
3
The second bearing (Figure B.1, key 4) is then pressed on and 174 cm lubricating grease is applied in the
same way as described for the first bearing.
The fixing plate (Figure B.1, key 3) is placed into position and the bolts drawn tight to keep the bearings in
place.
3
A portion of the lubricating grease, 190 cm , is placed behind the labyrinth grooves (Figure B.1, lubricating
grease portion D). No lubricating grease is placed in the labyrinth grooves.
3
Another portion of lubricating grease, 700 cm , is placed against the spacing ring and the bearings (Figure
B.1, lubricating grease portion C).
3
The remainder of the lubricating grease, 132 cm , is placed against the second bearing and fixing plate
...
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