GB/T 33540.2-2017 PDF English
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Lubricants for wind turbine -- Part 2: Open gear greases
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GB/T 33540.2-2017: PDF in English (GBT 33540.2-2017) GB/T 33540.2-2017
GB
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 75.100
E 40
Lubricants for wind turbine - Part 2. Open gear greases
ISSUED ON. MARCH 09, 2017
IMPLEMENTED ON. OCTOBER 01, 2017
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Product variety and identification ... 5
4 Requirements and test methods ... 5
5 Inspection rules ... 6
6 Marking, packaging, transportation and storage ... 8
Appendix A (Normative) Open gear grease slip test ... 9
Appendix B (Normative) Low temperature flexibility test of oil film for open gear
grease ... 12
Lubricants for wind turbine - Part 2. Open gear greases
1 Scope
This part of GB/T 33540 specifies the product variety and identification,
requirements and test methods, inspection rules, marking, packaging,
transportation and storage of the open gear greases for wind turbine.
This part is applicable to the lubrication of the open gear of the wind turbine
generator yaw system and variable pitch system. AND the application
temperature range is -40 °C ~ 120 °C.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this Standard.
GB/T 269 Lubricating grease and petrolatum - Determination cone
penetration
GB/T 678 Chemical reagent - Ethanol
GB/T 2361 Rust preventing oils and greases - Test method of wet heat
GB/T 4929 Lubricating grease - Determination of dropping point
GB/T 5018 Standard test method for determining corrosion preventive
properties of lubricating greases
GB/T 7325 Petroleum products; Lubricating greases and oils; Determination
of evaporation loss
GB/T 7326 Lubricating grease; Corrosiveness to copper; Copper strip test
GB/T 7631.1-2008 Lubricants, industrial oils and related products (Class L) -
Classification - Part 1. General
NB/SH/T 0203 Lubricating greases - Determination of bearing capacity -
Timken method
SH 0004 Solvent oil for use in rubber industry
SH/T 0048 Lubricating greases - Determination method of similar viscosity
SH/T 0081 Salt spray test method for rust preventive oil and grease
SH 0164 Petroleum products - Rules for packaging, storage, transportation
and handover acceptance
SH/T 0202 Determination method for extreme pressure property of
lubricating grease (four-ball machine method)
SH/T Determination method for lubricant abrasion resistance (four-ball
machine method)
SH/T 0218 Preparation method of test piece used for rust prevention grease
test
SH/T 0229 Sampling method for solid and semi-solid petroleum products
SH/T 0331 Test method for corrosion of lubricating grease
SH/T 0700 Determination of rust-prevention characteristics of lubricating
grease
3 Product variety and identification
3.1 Product variety
This part covers a product variety of the wind turbine generator open gear
greases, AND the product covered is divided into four consistency grades (0,
00, 1, 2) in accordance with the Appendix A of GB/T 7631.1-2008.
3.2 Product markings
Wind turbine generator open gear grease is marked as.
Product name Consistency grade Standard number
Example. Wind turbine generator open gear grease 0 GB/T 33540.2
4 Requirements and test methods
The technical requirements and test methods for the wind turbine generator
open gear grease are as shown in Table 1.
Appendix A
(Normative)
Open gear grease slip test
A.1 Scope
This method is suitable for determining the sliding performance of open gear
grease.
A.2 Summary of methods
In this method, vertically HANG the test piece coated with open gear grease at
70 °C ± 0.5 °C; after 48 h ± 0.5 h; OBSERVE the slipping of grease from the
metal surface.
A.3 Reagents and materials
A.3.1 Anhydrous ethanol. in line with GB/T 678.
A.3.2 Solvent oil for use in rubber industry. in line with SH 0004.
A.3.3 Sandpaper or emery cloth. No.180 and No.220.
A.3.4 Absorbent cotton.
A.3.5 steel sheet. in line with the B test piece material and specification
requirements as specified in the method A of SH/T 0218.
A.4 Instruments and equipment
A.4.1 Electric blast oven, with a thermometer, 0 °C ~ 100 °C, division 0.5 °C.
A.4.2 Scraper.
A.4.3 Hook.
A.4.4 Metal sheet grease coater. 50 mm × 50 mm × (0.4 ± 0.05) mm, the
center has a round hole of diameter 20 mm, AND it is required for the metal
sheet grease coater surface to be smooth and flat, as shown in Figure A.1.
B.5.1 Test preparation
B.5.1.1 Firstly USE the solvent oil and then the ethanol to wash the bright soft
metal test piece; BLOW it dry; COOL it to room temperature.
B.5.1.2 USE the solvent oil to wash the metal sheet grease coater, and KEEP
it smooth and free from grease stain.
B.5.1.3 ADJUST the temperature of the low temperature test chamber to
-40 °C ± 1 °C; MAINTAIN this temperature.
B.5.2 Analytical procedures
B.5.2.1 PLACE the grease coater on the top of the soft metal sheet and ALIGN
the grease coater with the soft metal sheet.
B.5.2.2 USE the scraper to uniformly coat the sample over the grease coater;
REMOVE the excessive grease; TAKE out the grease coater; MAKE the
grease retain on the soft metal test piece.
B.5.2.3 COAT 2 test pieces using the method as specified in B.5.2.2.
B.5.2.4 PLACE the soft metal test piece coated with the tested grease
horizontally in a low temperature test chamber which is already at -40 °C ±
1 °C; KEEP it at a low temperature for 30 min ± 2 min; within 2 s, FOLD the test
piece for 180° with the grease centerline as axis, with the greased side of the
soft metal test piece facing outwards; OBSERVE the adhesion and
embrittlement of the grease.
B.6 Results report
B.6.1 If the oil film on the two pieces of soft metal is cracked or peeled off or
striped off, the flexibility test fails. If the oil films on the two pieces of soft metal
test pieces do not have embrittlement or peeling off, the flexibility test results
are reported as qualified.
B.6.2 If one piece of soft metal test piece has oil film embrittlement or peeling
off, BUT the other piece does not, REPEAT this test. If there is still
embrittlement or peeling off, it is reported as disqualified.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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