1 Scope
This standard specifies types, dimensions, basic parameters, technical requirements, test methods, inspection rules, etc. of gearboxes for transportation machinery (hereinafter referred to as "gearboxes").
This standard is applicable to conic and cylindrical gearboxes with DBY two stage driving and DCY three stage driving. DBY and DCY gearboxes are mainly used for transportation machinery, and may also be used for various general machinery such as metallurgy, mine, chemical industry, coal, building material, light industry and petroleum, and the operating conditions shall meet the following requirements:
a) The maximum rotation speed of the input shaft shall not be larger than 1500r/min;
b) The circumferential velocity of the gear shall not be larger than 20m/s;
c) The working ambient temperature shall be -40~+45℃. Where the ambient temperature is less than 0℃, the lubricating oil before starting shall be heated.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, all editions indicated are valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the latest edition of the standards indicated below.
Foreword I
1 Scope
2 Normative References
3 Types and Dimensions
4 Basic Parameters and Bearing Capacity
5 Technical Requirements
6 Test Methods
7 Inspection Rules
8 Marking, Packing, Transport and Storage
9 Manufacturing Quality Assurance and Reliability Index
Appendix A (Normative) Bearing Capacity and Selection of Gearboxes
Appendix B (Normative) Relevant Provisions for Half Hard Tooth Surface Gearboxes
Appendix C (Informative) Load Classification of Working Machinery
Appendix D (Informative) Actual Drive Ratio of Gearboxes
Appendix E (Informative) Moment of Inertia of Gearboxes
