NBSHT0944.1-2017 PDF English
US$220.00 · In stock · Download in 9 secondsNBSHT0944.1-2017: Standard test method for wear preventive characteristics of lubricating fluid. FE8 rolling bearing method. Part 1: Lubricating oil Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| NB/SH/T 0944.1-2017 | English | 220 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Standard test method for wear preventive characteristics of lubricating fluid. FE8 rolling bearing method. Part 1: Lubricating oil
| Valid |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: NBSHT0944.1-2017
NB/SH/T 0944.1-2017: Standard test method for wear preventive characteristics of lubricating fluid. FE8 rolling bearing method. Part 1: Lubricating oil
---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/NBSHT0944.1-2017
PETROCHEMICAL INDUSTRY STANDARD
ICS 75.100
E 34
Standard test method for wear preventive characteristics of
lubricating fluid - FE8 rolling bearing method - Part 1.
Lubricating oil
Issued on. DECEMBER 27, 2017
Implemented on. JUNE 01, 2018
Issued by. National Energy Administration
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 4
4 Method overview... 7
5 Test equipment... 7
6 Reagents and materials... 10
7 Preparation of test bearings... 10
8 Test steps... 10
9 Report of results... 13
10 Precision... 14
Appendix A (Normative) Safety measures and precautions... 15
Appendix B (Normative) Maintenance and repair... 16
Foreword
NB/SH/T 0944 "Standard test method for wear preventive characteristics of lubricating
fluid - FE8 rolling bearing method" is divided into two Parts.
- Part 1.Lubricating oils;
- Part 2.Lubricating grease.
This Part is Part 1 of NB/SH/T 0944.
This Part was drafted in accordance with the rules given in GB/T 1.1-2009.
This Part uses the redrafting method, to modify and adopt the German national
standards DIN 51819-1.1999 and DIN 51819-3.2005 "Testing of lubricants - Testing
machinery with FE8 rolling bearings - Dynamic lubrication test".
The main technical differences, between this Part and DIN 51819-1.1999 and DIN
51819-3.2005, as well as the reasons, are as follows.
- For the convenience of use, MODIFY some reference standards into the
corresponding Chinese national standards;
- According to actual needs, only one test bearing of type 81212, which is specified
in DIN 722, is used in this Part; the other three test bearings are not used.
This Part was proposed by China Petrochemical Corporation.
This Part shall be under the jurisdiction of the National Petroleum Products and
Lubricants Standardization Technical Committee Petroleum Fuels and Lubricants Sub-
Technical Committee (SAC/TC 280/SC 1).
Drafting organization of this Part. Lanzhou Lubricant Research and Development
Center of China National Petroleum Corporation.
The main drafters of this Part. Zhang Kuande, Zhu Dengfeng, Xie Jingchun, Wang Peng,
Wei Tiesheng, Zhai Guorong.
This Part is the first release.
Standard test method for wear preventive characteristics of
lubricating fluid - FE8 rolling bearing method - Part 1.
Lubricating oil
WARNING. The application of this Part may involve certain hazardous materials,
operations, equipment. But not all safety issues related to this are advised. It is the
user's responsibility to formulate appropriate safety and protection measures,
meanwhile determine the applicability of relevant regulatory restrictions, before
using this Part (see Appendix A for details).
1 Scope
This Part specifies the test method for determining the wear preventive performance of
lubricating oil, by the use of thrust cylindrical rolling bearings, on the FE8 bearing wear
testing machine.
This Part applies to the evaluation of bearing's wear preventive performance of
lubricating oils, under mixed friction conditions.
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) is
applicable to this standard.
GB 1922-2006 Petroleum solvents for paints and cleaning
GB/T 6391 Rolling bearings - Dynamic load ratings and rating life
GB/T 17754-2012 Tribology terminology
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Loading time
The time, from the start of the test to the failure or completion of any one of the test
bearings, expressed in t.
Note. For the evaluation of lubricating oil, the recommended loading test time is 80 h.
3.2
Test duration
Time spent without failure, during continuous operation, expressed in tp. It is equal
to the loading time, for a test, which is completed in the specified time.
3.3
Friction torque
The rotation of the bearing generates frictional force, which in turn generates
frictional torque.
3.4
Friction torque of test bearing
The torque, which is required to drive the two test bearings and the auxiliary bearing,
expressed by Mr. It is equal to the product -- of the frictional force multiplied by the
distance from the point of application of the force to the axis (this distance is equal
to half the diameter of the pulley (6) in Figure 1).
3.5
Starting friction torque
The maximum torque, which is produced by the test bearing, after the test is started
1 min, expressed by Mrs.
4 Method overview
4.1 When using the FE8 bearing wear testing machine for the lubricating oil test, first
install two test bearings on the testing machine. Apply a certain amount of test oil into
the lubricating oil circulation system. Through the lubricating oil circulation system, it
supplies oil, at a rate of 0.1 L/min ± 0.02 L/min, to each test bearing.
5 Test equipment
5.1 FE8 testing machine
5.1.1 The test equipment adopts FE8 bearing wear testing machine, which consists of
test head, drive unit, control system. The test head (see Figure 1) is detachably
connected to the drive unit, through the cone seat of the test head shaft (7).
5.1.3 At the driving end of the test head, a pulley (6) is installed, for connecting the
friction force measuring rope. The distance, between the force application point and the
axis of the test head shaft, is 0.12 m (equal to half the diameter of the pulley).
5.2 Test bearings
When the FE8 bearing wear testing machine is used, to measure the wear performance
of lubricating oil, the test bearing used is a thrust cylindrical rolling bearing (see Figure
2 for the assembly diagram), which meets the requirements of DIN 722; the model is
81212.It contains a solid copper-zinc cage AND can be used up to 200 °C.
Figure 2 -- Test head to accommodate thrust cylindrical rolling bearing
5.3 Test measurement
5.3.1 Measurement of friction force. The friction force, which is generated by the
operation of the two test bearings, is measured by a load cell. The friction force change
is recorded by a test friction force recording system. Before and after the test, the load
cell shall be calibrated, by the use of calibration weight.
5.4 Test equipment
5.4.1 Protective gloves. Avoid direct contact with hands, when handling the test bearing.
5.4.2 Heating plate. It is used to heat the test bearing.
5.4.3 Cleaner. It is used to clean the test bearing.
5.4.4 Brush. The size shall be suitable for the cleaning of the test bearing.
5.4.5 Special rag. No lint or fibers falling off, during the process of use.
6 Reagents and materials
Cleaning solvent. The solvent oil for cleaning meets the requirements of No.2 solvent
oil in GB 1922-2006.
7 Preparation of test bearings
7.1 Take the roller of the test bearing out of the cage. Put it into the cleaning cup. Use
a brush, which is dipped in cleaning solvent, to clean it. In the same way, clean the
bearing's outer ring, bearing's inner ring, bearing cage, etc.
7.2 Use balance to weigh the mass of the roller and the cage. Record it, accurate to 1
mg. Install the rollers into the cage housing, at room temperature. Before installation,
use cleaning solvent and special cloth, to clean the installation tool.
8 Test steps
8.1 Setting of test conditions
The set speed is 7.5 r/min ± 0.5 r/min; the temperature is 80 °C ± 1 °C. Apply an axial
load of 80 kN ± 3 kN, to the test bearing.
8.2 Installation of test bearings
8.2.1 Install the bearing spacer, the inner ring of the test bearing, the cage with rollers,
the outer ring of the bearing, on the test shaft in sequence (see Figure 1). The inner ring
of the bearing needs to be heated to 80 °C, before installation. Install the bearing-
mounted test shaft, into the test head housing. Then install the loading spring into the
test head. Apply a certain test load, to the assembled test head, through the high-pressure
press. Use bolts to tighten it (tightening torque is 40 N•m). Connect the assembled test
head to the testing machine.
8.3 Preparation of the lubrication system
The lubricating oil circulation system is composed of an oil tank and an oil pump, which
has a filter and a flow regulating device. Lubricating oil is supplied to each bearing, at
a volume flow rate of 0.1 L/min ± 0.02 L/min, through the lubricating oil circulation
system.
8.4 Start-up test
After the test is started, adjust the external heating device, so that the test oil reaches
the required stable test temperature. Properly position heaters and cooling fans, as
relative to each other, for temperature control.
8.5 Monitoring of friction torque variation
If the friction torque is greater than the boundary value by 60 N•m AND lasts for more
than 10 s, the test shall be terminated immediately. It reports the actual test time, in the
test report. Record change of friction torque, by the corresponding recording system. It
can obtain the starting friction torque and operating friction torque, at the end of the
test.
8.8 Result calculation and evaluation
Input the wear loss values of the four bearing rollers and cages of the two tests, into the
Welbull diagram distribution software, respectively.
9 Report of results
9.1 Test information
9.1.1 The lubricating oil's test information shall at least include the following contents.
9.1.2 Example of test information. The test is identified as "Testing method-D-7.5/80-
80". That is, "The lubricating oil test, which is specified in this Part, is carried out under
the condition of axial force of 80 kN, test speed of 7.5 r/min, test temperature of 80 °C".
9.2 Report
9.2.1 Roller's wear loss (mw50) and cage's wear loss (mk50), when the wear rate is 50%,
in milligrams (mg); as well as the test conditions and the arithmetic mean of the starting
friction torque (Mrs) and the operating friction torque (Mrb), in Newtons (N).
10 Precision
10.1 Overview
Carry out the test, under the same conditions specified in the method. Use different test
oils, to obtain different wear loss of roller mw50 and the wear loss of cage mk50, in the
wear loss range of 0 ~ 1000 mg.
10.2 Repeatability, r
This Part cannot determine the repeatability of the test method. Because in the repeated
test, it shall be replaced with a new test bearing, so the evaluation results will be affected,
due to the difference in processing conditions and dimensions of different bearings.
10.3 Reproducibility, R
10.3.1 In different laboratories, the same test conditions are used to test, to obtain two
sets of different wear results. If it does not exceed the percentage value range of
deviation boundary, for comparing the wear results given in Table 1, THEN, the two
sets of results shall be recognized AND meet the requirements of this Part. This
reproducibility rule applies to both roller's wear loss and cage's wear loss.
NB/SH/T 0944.1-2017
PETROCHEMICAL INDUSTRY STANDARD
ICS 75.100
E 34
Standard test method for wear preventive characteristics of
lubricating fluid - FE8 rolling bearing method - Part 1.
Lubricating oil
Issued on. DECEMBER 27, 2017
Implemented on. JUNE 01, 2018
Issued by. National Energy Administration
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 4
4 Method overview... 7
5 Test equipment... 7
6 Reagents and materials... 10
7 Preparation of test bearings... 10
8 Test steps... 10
9 Report of results... 13
10 Precision... 14
Appendix A (Normative) Safety measures and precautions... 15
Appendix B (Normative) Maintenance and repair... 16
Foreword
NB/SH/T 0944 "Standard test method for wear preventive characteristics of lubricating
fluid - FE8 rolling bearing method" is divided into two Parts.
- Part 1.Lubricating oils;
- Part 2.Lubricating grease.
This Part is Part 1 of NB/SH/T 0944.
This Part was drafted in accordance with the rules given in GB/T 1.1-2009.
This Part uses the redrafting method, to modify and adopt the German national
standards DIN 51819-1.1999 and DIN 51819-3.2005 "Testing of lubricants - Testing
machinery with FE8 rolling bearings - Dynamic lubrication test".
The main technical differences, between this Part and DIN 51819-1.1999 and DIN
51819-3.2005, as well as the reasons, are as follows.
- For the convenience of use, MODIFY some reference standards into the
corresponding Chinese national standards;
- According to actual needs, only one test bearing of type 81212, which is specified
in DIN 722, is used in this Part; the other three test bearings are not used.
This Part was proposed by China Petrochemical Corporation.
This Part shall be under the jurisdiction of the National Petroleum Products and
Lubricants Standardization Technical Committee Petroleum Fuels and Lubricants Sub-
Technical Committee (SAC/TC 280/SC 1).
Drafting organization of this Part. Lanzhou Lubricant Research and Development
Center of China National Petroleum Corporation.
The main drafters of this Part. Zhang Kuande, Zhu Dengfeng, Xie Jingchun, Wang Peng,
Wei Tiesheng, Zhai Guorong.
This Part is the first release.
Standard test method for wear preventive characteristics of
lubricating fluid - FE8 rolling bearing method - Part 1.
Lubricating oil
WARNING. The application of this Part may involve certain hazardous materials,
operations, equipment. But not all safety issues related to this are advised. It is the
user's responsibility to formulate appropriate safety and protection measures,
meanwhile determine the applicability of relevant regulatory restrictions, before
using this Part (see Appendix A for details).
1 Scope
This Part specifies the test method for determining the wear preventive performance of
lubricating oil, by the use of thrust cylindrical rolling bearings, on the FE8 bearing wear
testing machine.
This Part applies to the evaluation of bearing's wear preventive performance of
lubricating oils, under mixed friction conditions.
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) is
applicable to this standard.
GB 1922-2006 Petroleum solvents for paints and cleaning
GB/T 6391 Rolling bearings - Dynamic load ratings and rating life
GB/T 17754-2012 Tribology terminology
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Loading time
The time, from the start of the test to the failure or completion of any one of the test
bearings, expressed in t.
Note. For the evaluation of lubricating oil, the recommended loading test time is 80 h.
3.2
Test duration
Time spent without failure, during continuous operation, expressed in tp. It is equal
to the loading time, for a test, which is completed in the specified time.
3.3
Friction torque
The rotation of the bearing generates frictional force, which in turn generates
frictional torque.
3.4
Friction torque of test bearing
The torque, which is required to drive the two test bearings and the auxiliary bearing,
expressed by Mr. It is equal to the product -- of the frictional force multiplied by the
distance from the point of application of the force to the axis (this distance is equal
to half the diameter of the pulley (6) in Figure 1).
3.5
Starting friction torque
The maximum torque, which is produced by the test bearing, after the test is started
1 min, expressed by Mrs.
4 Method overview
4.1 When using the FE8 bearing wear testing machine for the lubricating oil test, first
install two test bearings on the testing machine. Apply a certain amount of test oil into
the lubricating oil circulation system. Through the lubricating oil circulation system, it
supplies oil, at a rate of 0.1 L/min ± 0.02 L/min, to each test bearing.
5 Test equipment
5.1 FE8 testing machine
5.1.1 The test equipment adopts FE8 bearing wear testing machine, which consists of
test head, drive unit, control system. The test head (see Figure 1) is detachably
connected to the drive unit, through the cone seat of the test head shaft (7).
5.1.3 At the driving end of the test head, a pulley (6) is installed, for connecting the
friction force measuring rope. The distance, between the force application point and the
axis of the test head shaft, is 0.12 m (equal to half the diameter of the pulley).
5.2 Test bearings
When the FE8 bearing wear testing machine is used, to measure the wear performance
of lubricating oil, the test bearing used is a thrust cylindrical rolling bearing (see Figure
2 for the assembly diagram), which meets the requirements of DIN 722; the model is
81212.It contains a solid copper-zinc cage AND can be used up to 200 °C.
Figure 2 -- Test head to accommodate thrust cylindrical rolling bearing
5.3 Test measurement
5.3.1 Measurement of friction force. The friction force, which is generated by the
operation of the two test bearings, is measured by a load cell. The friction force change
is recorded by a test friction force recording system. Before and after the test, the load
cell shall be calibrated, by the use of calibration weight.
5.4 Test equipment
5.4.1 Protective gloves. Avoid direct contact with hands, when handling the test bearing.
5.4.2 Heating plate. It is used to heat the test bearing.
5.4.3 Cleaner. It is used to clean the test bearing.
5.4.4 Brush. The size shall be suitable for the cleaning of the test bearing.
5.4.5 Special rag. No lint or fibers falling off, during the process of use.
6 Reagents and materials
Cleaning solvent. The solvent oil for cleaning meets the requirements of No.2 solvent
oil in GB 1922-2006.
7 Preparation of test bearings
7.1 Take the roller of the test bearing out of the cage. Put it into the cleaning cup. Use
a brush, which is dipped in cleaning solvent, to clean it. In the same way, clean the
bearing's outer ring, bearing's inner ring, bearing cage, etc.
7.2 Use balance to weigh the mass of the roller and the cage. Record it, accurate to 1
mg. Install the rollers into the cage housing, at room temperature. Before installation,
use cleaning solvent and special cloth, to clean the installation tool.
8 Test steps
8.1 Setting of test conditions
The set speed is 7.5 r/min ± 0.5 r/min; the temperature is 80 °C ± 1 °C. Apply an axial
load of 80 kN ± 3 kN, to the test bearing.
8.2 Installation of test bearings
8.2.1 Install the bearing spacer, the inner ring of the test bearing, the cage with rollers,
the outer ring of the bearing, on the test shaft in sequence (see Figure 1). The inner ring
of the bearing needs to be heated to 80 °C, before installation. Install the bearing-
mounted test shaft, into the test head housing. Then install the loading spring into the
test head. Apply a certain test load, to the assembled test head, through the high-pressure
press. Use bolts to tighten it (tightening torque is 40 N•m). Connect the assembled test
head to the testing machine.
8.3 Preparation of the lubrication system
The lubricating oil circulation system is composed of an oil tank and an oil pump, which
has a filter and a flow regulating device. Lubricating oil is supplied to each bearing, at
a volume flow rate of 0.1 L/min ± 0.02 L/min, through the lubricating oil circulation
system.
8.4 Start-up test
After the test is started, adjust the external heating device, so that the test oil reaches
the required stable test temperature. Properly position heaters and cooling fans, as
relative to each other, for temperature control.
8.5 Monitoring of friction torque variation
If the friction torque is greater than the boundary value by 60 N•m AND lasts for more
than 10 s, the test shall be terminated immediately. It reports the actual test time, in the
test report. Record change of friction torque, by the corresponding recording system. It
can obtain the starting friction torque and operating friction torque, at the end of the
test.
8.8 Result calculation and evaluation
Input the wear loss values of the four bearing rollers and cages of the two tests, into the
Welbull diagram distribution software, respectively.
9 Report of results
9.1 Test information
9.1.1 The lubricating oil's test information shall at least include the following contents.
9.1.2 Example of test information. The test is identified as "Testing method-D-7.5/80-
80". That is, "The lubricating oil test, which is specified in this Part, is carried out under
the condition of axial force of 80 kN, test speed of 7.5 r/min, test temperature of 80 °C".
9.2 Report
9.2.1 Roller's wear loss (mw50) and cage's wear loss (mk50), when the wear rate is 50%,
in milligrams (mg); as well as the test conditions and the arithmetic mean of the starting
friction torque (Mrs) and the operating friction torque (Mrb), in Newtons (N).
10 Precision
10.1 Overview
Carry out the test, under the same conditions specified in the method. Use different test
oils, to obtain different wear loss of roller mw50 and the wear loss of cage mk50, in the
wear loss range of 0 ~ 1000 mg.
10.2 Repeatability, r
This Part cannot determine the repeatability of the test method. Because in the repeated
test, it shall be replaced with a new test bearing, so the evaluation results will be affected,
due to the difference in processing conditions and dimensions of different bearings.
10.3 Reproducibility, R
10.3.1 In different laboratories, the same test conditions are used to test, to obtain two
sets of different wear results. If it does not exceed the percentage value range of
deviation boundary, for comparing the wear results given in Table 1, THEN, the two
sets of results shall be recognized AND meet the requirements of this Part. This
reproducibility rule applies to both roller's wear loss and cage's wear loss.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Tips & Frequently Asked QuestionsQuestion 1: How long will the true-PDF of English version of NBSHT0944.1-2017 be delivered?Answer: The full copy PDF of English version of NBSHT0944.1-2017 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice. Question 2: Can I share the purchased PDF of NBSHT0944.1-2017_English with my colleagues?Answer: Yes. The purchased PDF of NBSHT0944.1-2017_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- NBSHT0944.1-2017 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds. How to buy and download a true PDF of English version of NBSHT0944.1-2017?A step-by-step guide to download PDF of NBSHT0944.1-2017_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).
Step 2: Search keyword "NBSHT0944.1-2017".
Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart.
Step 4: Select payment option (Via payment agents Stripe or PayPal).
Step 5: Customize Tax Invoice -- Fill up your email etc.
Step 6: Click "Checkout".
Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively.
Step 8: Optional -- Go to download PDF.
Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice.
See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9
|