1 Scope
This document specifies the test method for the gluing load capacity of different lubricants for test gears under specific test conditions, and the comparison method for the gluing load capacity of different gears under the same test conditions, including test purpose, test equipment, test types, failure evaluation, test procedures and test reports.
This document applies to the test of thermal bonding damage caused by the breakdown of the lubricant film on the tooth surface due to high temperatures caused by load and tooth sliding under oil-lubricated conditions.
This document does not apply to cold galling at low tooth sliding speeds due to high tooth surface pressure, severe off-loading or inadequate lubrication.
2 Normative references
The contents of the following documents constitute essential provisions of this document through the normative references in the text. Among them, note the date of the cited documents, only the date of the corresponding version applies to this document; do not note the date of the cited documents, its latest version (including all the revision of the list) applies to this document.
GB/T 1356 Standard Cylindrical Tooth Profile for General and Heavy Machinery Basic Rack Tooth Profile
GB 1922-2006 Solvent Oil for Paint and Cleaning
GB/T 2821 Geometric Element Code of Gears
GB/T 3374.1 Gear Terms and Definitions Part 1: Geometric Definitions
GB/T 3480.1-2019 Calculation of Load Carrying Capacity of Spur and Helical Gears Part 1: Basic Principles, Overview and General Influence Factors
GB/T 3480.2-2021 Calculation of Load Carrying Capacity of Spur and Helical Gears Part 2: Calculation of Tooth Surface Contact Strength Pitting
GB/T 10095 (All Parts) Cylindrical Gears, Precision System
GB/T 19936.1-2005 FZG Test Procedure for Gears Part 1: Relative Glue Bearing Capacity of Oils FZG Test Method A/8.3/90
3 Terms and definitions
The terms defined in GB/T 2821 and GB/T 3374.1 and the following terms and definitions apply to this document.
3.1
Gluing scuffing
Damage to gear meshing surfaces in the sliding direction caused by adhesive wear.
Note 1. scuffing is the migration of material from the same or different tooth surfaces due to severe adhesion, or the loss of material due to welding and tearing. note 2 Typical tooth scuffing generally occurs at high temperatures. High pressures or high relative sliding speeds are caused by the lack or destruction of the lubricant film between the meshing tooth surfaces.
or breakdown of the lubricating oil film between the intermeshing tooth surfaces.
Note 3: Abrasion is classified as abrasive wear and not as galling.
3.2
3.2 Scuffing load capacity of oils
The maximum load that the lubricant can withstand against gear galling under the test conditions of the specified installation.
3.3
scuffing load capacity of gears
The maximum load that can be carried by gears without galling failure under the specified test conditions.
4 Symbols
The symbols listed in Table 1 are applicable to this document.
Table 1 Symbols, their description and units
5 Purpose of the test
5.1 Test of oil galling load carrying capacity
Under the specified test conditions, standard test gears made of specific parameters
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Purpose of the test
6 Test equipment
7 Test types
8 Failure evaluation of the test gear
9 Test procedure
10 Test report
Appendix A (normative) CL-100 gear testing machine main technical performance
Appendix B (Informative) Calibration of CL-100 Gear Testing Machine
Appendix C (normative) Parameters of the "A" type test gear
Appendix D (Informative) Gluing Test Records
