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NB/SH/T 0845-2010: Determination of viscosity shear stability of transmission lubricants using the tapered roller bearing rig
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/NBSHT0845-2010
PETROCHEMICAL INDUSTRY STANDARD
ICS 75.100
E 34
Determination of viscosity shear stability of transmission
lubricants using the tapered roller bearing rig
Issued on. JANUARY 09, 2011
Implemented on. MAY 01, 2011
Issued by. National Energy Administration
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Method overview... 4
4 Test equipment... 5
5 Reagents and materials... 5
6 Preparations... 5
7 Calibration and measurement uncertainty... 9
8 Test steps... 10
9 Test evaluation... 10
10 Test report and test validity... 11
11 Reference oil calibrating machine... 11
12 Precision... 12
Appendix A (Informative) Comparison of the chapter numbers between this standard
and CEC L-45-99 (2008)... 14
Appendix B (Informative) Shear stability test report for tapered roller bearings... 15
Foreword
This standard modifies and adopts the European Coordination Committee Standard
CEC L-45-99 (2008) "Determination of viscosity shear stability of transmission
lubricants".
This standard was redrafted, according to CEC L-45-99 (2008).
In order to be more suitable for China's national conditions, this standard has been
revised, when CEC L-45-99 (2008) is adopted. See Appendix A, for structural
differences between this standard and CEC L-45-99 (2008). The main technical
differences, between this standard and CEC L-45-99 (2008), are as follows.
- In this standard, ADD the chapters "1 Scope", "2 Normative references", "3 Method
overview", "5 Reagents and materials".
- In this standard, DELETE the standards in the CEC L-45-99 (2008) standard, that
are not cited in this standard; ADOPT the corresponding current Chinese standards
for the cited standards.
- In this standard, DELETE "7.3 Standard/definition", "12 Document", "13
Identification/quality", "14 Oil database" in CEC L-45-99 (2008).
Appendix A and Appendix B of this standard are informative appendixes.
This standard was proposed by China Petrochemical Corporation.
This standard shall be under the jurisdiction of the Petroleum Fuels and Lubricants Sub-
Technical Committee of National Petroleum Products and Lubricants Standardization
Technical Committee (SAC/TC 280/SC 1).
Drafting organizations of this standard. Petrochemical Research Institute of China
Petroleum & Chemical Corporation, Dalian R&D Center of Lubricating Oil Branch of
China National Petroleum Corporation, Beijing R&D Center of Sinopec Lubricating
Oil Branch.
The main drafters of this standard. Luqiu Qiming, Song Haiqing, Sun Dong, Yang
Jiexian, Xia Peng, Tian Sheng.
Determination of viscosity shear stability of transmission
lubricants using the tapered roller bearing rig
1 Scope
1.1 This standard specifies a test method, for evaluating the viscosity shear stability of
transmission lubricants, using a tapered roller bearing rig.
1.2 This standard applies to all kinds of transmission lubricants.
1.3 This standard deals with certain hazardous materials, operations, equipment, BUT
is not intended to make recommendations on all safety issues related thereto. Therefore,
users shall establish appropriate safety and protective measures AND determine the
applicability of relevant regulatory restrictions, before using this standard.
2 Normative references
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For the dated references, the subsequent amendments
(excluding corrections) or revisions do not apply to this Standard; however, parties who
reach an agreement based on this Standard are encouraged to study if the latest versions
of these documents are applicable. For undated references, the latest edition of the
referenced document applies.
GB/T 265 Petroleum products - Determination of kinematic viscosity and
calculation of kinematic viscosity
JJF 1001 General terms in metrology and their definitions
JJF 1059 Evaluation and expression of uncertainty in measurement
3 Method overview
This method uses a tapered roller bearing rig, under the test conditions similar to the
gearbox, to make the lubricant be subject to the action of mechanical shear stress,
resulting in permanent viscosity loss; uses the drop rate of the kinematic viscosity of
lubricant, to represent the viscosity shear stability of the lubricant.
4 Test equipment
4.1 Rig. Standard four-ball extreme pressure rig, with constant temperature control.
4.3 Test piece. SKF32008XQ tapered roller bearing.
5 Reagents and materials
5.1 N-heptane. Analytically pure, which is used for cleaning test pieces.
5.2 The reference oils are as follows.
6 Preparations
6.1 Preparation of tapered roller bearings and their adapters
6.1.1 Running-in of tapered roller bearings
6.1.2 Cleaning and installation
6.1.2.1 Cleaning
Use a suitable solvent, such as n-heptane, to clean tapered roller bearings and their
adapters; then blow them dry.
6.3 Determination of kinematic viscosity
The kinematic viscosity of the test lubricant, before and after the test, is measured
according to the GB/T 265 method, by a capillary viscometer, at a temperature of
100 °C.
7 Calibration and measurement uncertainty
Note. Refer to JJF 1001 and JJF 1059, for relevant terms and definitions of traceability of
quantities.
7.1 Measurement uncertainty
Two levels of measurement uncertainty are defined for each parameter.
7.2 Calibration interval
The interval between two calibrations needs to be adjusted, according to the following
conditions.
8 Test steps
8.1 Turn on the thermostat before starting the machine, to preheat the test oil
temperature to 50 °C ± 1 °C.
8.2 Adjust the thermostat, to make the oil temperature reach 60 °C ± 1 °C. Then start
the machine, to conduct the test, according to the test conditions specified in Table 3.
8.3 Stop the test. Turn off the thermostat. Then remove the tapered roller bearing adapter
from the rig. Remove the adapter. Pour the test oil into a clean container.
9 Test evaluation
9.1 Evaluation of relative viscosity change
9.1.1 The viscosity shear stability of the test lubricant is expressed by the relative
viscosity loss Rv (%), which is calculated by formula (1).
10 Test report and test validity
10.1 Basic content of the test report
The basic contents of the test report shall mainly include.
10.2 Operation data
10.3 Result representation
- Viscosity shear loss percentage of the test lubricant (%).
11 Reference oil calibrating machine
11.1 Reference oil calibrating machine
In order to check whether the performance of the test equipment is normal, the reference
oil calibrating machine test shall be carried out. The laboratory shall perform a rotation
test of the three reference oils, according to the matrix given in 11.2; the limit for each
reference oil is given in 11.3.If the results exceed these limits, the test piece shall be
inspected, according to the running-in procedure of 6.1.1.Only when the rig fully meets
the criteria given in this section, can it be used for evaluation tests.
NB/SH/T 0845-2010
PETROCHEMICAL INDUSTRY STANDARD
ICS 75.100
E 34
Determination of viscosity shear stability of transmission
lubricants using the tapered roller bearing rig
Issued on. JANUARY 09, 2011
Implemented on. MAY 01, 2011
Issued by. National Energy Administration
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Method overview... 4
4 Test equipment... 5
5 Reagents and materials... 5
6 Preparations... 5
7 Calibration and measurement uncertainty... 9
8 Test steps... 10
9 Test evaluation... 10
10 Test report and test validity... 11
11 Reference oil calibrating machine... 11
12 Precision... 12
Appendix A (Informative) Comparison of the chapter numbers between this standard
and CEC L-45-99 (2008)... 14
Appendix B (Informative) Shear stability test report for tapered roller bearings... 15
Foreword
This standard modifies and adopts the European Coordination Committee Standard
CEC L-45-99 (2008) "Determination of viscosity shear stability of transmission
lubricants".
This standard was redrafted, according to CEC L-45-99 (2008).
In order to be more suitable for China's national conditions, this standard has been
revised, when CEC L-45-99 (2008) is adopted. See Appendix A, for structural
differences between this standard and CEC L-45-99 (2008). The main technical
differences, between this standard and CEC L-45-99 (2008), are as follows.
- In this standard, ADD the chapters "1 Scope", "2 Normative references", "3 Method
overview", "5 Reagents and materials".
- In this standard, DELETE the standards in the CEC L-45-99 (2008) standard, that
are not cited in this standard; ADOPT the corresponding current Chinese standards
for the cited standards.
- In this standard, DELETE "7.3 Standard/definition", "12 Document", "13
Identification/quality", "14 Oil database" in CEC L-45-99 (2008).
Appendix A and Appendix B of this standard are informative appendixes.
This standard was proposed by China Petrochemical Corporation.
This standard shall be under the jurisdiction of the Petroleum Fuels and Lubricants Sub-
Technical Committee of National Petroleum Products and Lubricants Standardization
Technical Committee (SAC/TC 280/SC 1).
Drafting organizations of this standard. Petrochemical Research Institute of China
Petroleum & Chemical Corporation, Dalian R&D Center of Lubricating Oil Branch of
China National Petroleum Corporation, Beijing R&D Center of Sinopec Lubricating
Oil Branch.
The main drafters of this standard. Luqiu Qiming, Song Haiqing, Sun Dong, Yang
Jiexian, Xia Peng, Tian Sheng.
Determination of viscosity shear stability of transmission
lubricants using the tapered roller bearing rig
1 Scope
1.1 This standard specifies a test method, for evaluating the viscosity shear stability of
transmission lubricants, using a tapered roller bearing rig.
1.2 This standard applies to all kinds of transmission lubricants.
1.3 This standard deals with certain hazardous materials, operations, equipment, BUT
is not intended to make recommendations on all safety issues related thereto. Therefore,
users shall establish appropriate safety and protective measures AND determine the
applicability of relevant regulatory restrictions, before using this standard.
2 Normative references
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For the dated references, the subsequent amendments
(excluding corrections) or revisions do not apply to this Standard; however, parties who
reach an agreement based on this Standard are encouraged to study if the latest versions
of these documents are applicable. For undated references, the latest edition of the
referenced document applies.
GB/T 265 Petroleum products - Determination of kinematic viscosity and
calculation of kinematic viscosity
JJF 1001 General terms in metrology and their definitions
JJF 1059 Evaluation and expression of uncertainty in measurement
3 Method overview
This method uses a tapered roller bearing rig, under the test conditions similar to the
gearbox, to make the lubricant be subject to the action of mechanical shear stress,
resulting in permanent viscosity loss; uses the drop rate of the kinematic viscosity of
lubricant, to represent the viscosity shear stability of the lubricant.
4 Test equipment
4.1 Rig. Standard four-ball extreme pressure rig, with constant temperature control.
4.3 Test piece. SKF32008XQ tapered roller bearing.
5 Reagents and materials
5.1 N-heptane. Analytically pure, which is used for cleaning test pieces.
5.2 The reference oils are as follows.
6 Preparations
6.1 Preparation of tapered roller bearings and their adapters
6.1.1 Running-in of tapered roller bearings
6.1.2 Cleaning and installation
6.1.2.1 Cleaning
Use a suitable solvent, such as n-heptane, to clean tapered roller bearings and their
adapters; then blow them dry.
6.3 Determination of kinematic viscosity
The kinematic viscosity of the test lubricant, before and after the test, is measured
according to the GB/T 265 method, by a capillary viscometer, at a temperature of
100 °C.
7 Calibration and measurement uncertainty
Note. Refer to JJF 1001 and JJF 1059, for relevant terms and definitions of traceability of
quantities.
7.1 Measurement uncertainty
Two levels of measurement uncertainty are defined for each parameter.
7.2 Calibration interval
The interval between two calibrations needs to be adjusted, according to the following
conditions.
8 Test steps
8.1 Turn on the thermostat before starting the machine, to preheat the test oil
temperature to 50 °C ± 1 °C.
8.2 Adjust the thermostat, to make the oil temperature reach 60 °C ± 1 °C. Then start
the machine, to conduct the test, according to the test conditions specified in Table 3.
8.3 Stop the test. Turn off the thermostat. Then remove the tapered roller bearing adapter
from the rig. Remove the adapter. Pour the test oil into a clean container.
9 Test evaluation
9.1 Evaluation of relative viscosity change
9.1.1 The viscosity shear stability of the test lubricant is expressed by the relative
viscosity loss Rv (%), which is calculated by formula (1).
10 Test report and test validity
10.1 Basic content of the test report
The basic contents of the test report shall mainly include.
10.2 Operation data
10.3 Result representation
- Viscosity shear loss percentage of the test lubricant (%).
11 Reference oil calibrating machine
11.1 Reference oil calibrating machine
In order to check whether the performance of the test equipment is normal, the reference
oil calibrating machine test shall be carried out. The laboratory shall perform a rotation
test of the three reference oils, according to the matrix given in 11.2; the limit for each
reference oil is given in 11.3.If the results exceed these limits, the test piece shall be
inspected, according to the running-in procedure of 6.1.1.Only when the rig fully meets
the criteria given in this section, can it be used for evaluation tests.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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