Foreword
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This document is developed in accordance with the rules given in GB/T 101-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.
This document is the part 18 of GB/T 37400 Heavy mechanical general technical specification. The following parts of GB/T 37400 have been issued:
——Part 1: Products inspection and test;
——Part 2: Flame cutting parts;
——Part 3: Welding parts;
——Part 4: Iron castings;
——Part 5: Nonferrous metal casting;
——Part 6: Steel castings;
——Part 7: Repair welding for steel castings;
——Part 8: Forgings;
——Part 9: Machining parts;
——Part 10: Assembling;
——Part 11: Piping;
——Part 12: Painting;
——Part 13: Packaging;
——Part 14: Nondestructive test of steel castings;
——Part 15: Nondestructive test of steel forgings;
——Part 16: Hydrostatic system;
——Part 17: Repair welding for steel forging;
——Part 18: Opening gear drives system.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This document was proposed by and is under the jurisdiction of the National Technical Committee on Metallurgical Equipment of the Standardization Administration of China (SAC/TC 409).
Introduction
GB/T 37400 is widely used not only in metallurgy, mining, lifting, material handling, industrial vehicles and other industries, but also in the equipment manufacturing process of engineering machinery, petrochemical, nuclear power, wind power, large aircraft, rail transit and other industries. It is an important basic process standard in the manufacturing of large and medium-sized equipment in various industries in China.
GB/T 37400 classifies the main process stages in the manufacturing process of heavy machinery products, including material preparation, supporting inspection, cutting processing, assembly, painting, packaging, etc., thus constructing a relatively complete standard system, aiming to provide a basis for design, manufacturing, inspection, and acceptance for relevant production enterprises, business units, industry counterparts, and departments. GB/T 37400 consists of 18 parts.
——Part 1: Products inspection and test. The purpose is to ensure the quality of the parts of the products undertaken by each unit, and to ultimately ensure the quality of the whole machine.
——Part 2: Flame cutting parts. The purpose is to systematically supplement and improve the definition, requirements, grading, and methods of verticality and inclination tolerances, cutting surface quality, and inspection.
——Part 3: Welding parts. The purpose is to provide a reference basis for the manufacturing of steel welded parts using manual metal arc welding, gas-shield arc welding, submerged arc welding, and ammonia arc welding.
——Part 4: Iron castings. The purpose is to provide reference basis for the design and manufacturing of heavy machinery products.
——Part 5: Nonferrous metal casting. The purpose is to provide reference basis for special purposes, such as the design and manufacturing of complex structures and similar products of heavy machinery.
——Part 6: Steel castings. The purpose is to optimize the determination and retesting rules of impact absorption energy for steel castings, and improve detection accuracy.
——Part 7: Repair welding for steel castings. The purpose is to provide guidance on the repair welding process of defects in carbon steel, low alloy steel, and high manganese steel castings before precision machining.
——Part 8: Forgings. The purpose is to ensure the quality of important forgings in heavy machinery and improve the rules for retesting and judgment.
——Part 9: Machining parts. The purpose is to systematically and comprehensively propose technical requirements for machined parts.
——Part 10: Assembling. The purpose is to clarify the general technical requirements for geometric tolerances, assembly connection methods, typical component assembly, final assembly, inspection and commissioning, disassembly, etc. of assembled components.
——Part 11: Piping. The purpose is to achieve piping for oil lubrication, grease lubrication, hydraulic, pneumatic, and industrial water systems for different mechanical products.
——Part 12: Painting. The purpose is to clarify the coating technology requirements and testing requirements for heavy machinery products and their parts and components.
——Part 13: Packaging. The purpose is to clarify the packaging category, packaging materials, protection and fixation of goods, packaging requirements, and test methods for heavy machinery products.
——Part 14: Nondestructive test of steel castings. The purpose is to clarify the testing requirements for the welding repair area of steel castings, and provide users with corresponding measurement methods and acceptance requirements.
——Part 15: Nondestructive test of steel forgings. The purpose is to clarify the testing requirements for the welding repair area of steel forgings, and provide users with corresponding measurement methods and acceptance requirements.
——Part 16: Hydrostatic system. The purpose is to provide the implementation basis for the design, manufacturing, and inspection acceptance of the hydraulic system of current heavy machinery equipment.
——Part 17: Repair welding for steel forging. The purpose is to provide guidance for the repair welding process of defects in carbon structural steel and alloy structural steel before precision machining.
——Part 18: Opening gear drives system. The purpose is to provide technical guidance for the manufacturing, installation, commissioning, and operation maintenance of opening gears, ensuring their stable and reliable operation.
Heavy mechanical general technical specification - Part 18: Opening gear drives system
1 Scope
This document specifies the type classification, technical requirements, test methods, inspection as well as marking, packaging, transportation, storage of opening gear drives system. This document is applicable to the low-speed heavy-load involute opening gear drives systems used on cylindrical rotary equipment, such as ball mills, rod mills, autogenous mills, semi-autogenous mills, rotary kilns, cooling machines, drying machines, and drum mixers. It may serve as a reference for other rotary opening gear drives systems.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 1348-2019 Spheroidal graphite iron castings
GB/T 3374.1 Vocabulary of gear terms - Part 1: Definitions related to geometry
GB/T 3480.5-2021 Calculation of load capacity of spur and helical gears - Part 5: Strength and quality of materials
GB/T 3505 Geometrical product specifications (GPS)—Surface texture: Profile method—Terms, definitions and surface texture parameters
GB/T 6388 Transport package shipping mark
GB/T 10095.1-2022 Cylindrical gears - ISO system of flank tolerance classification - Part 1: Definitions and allowable values of deviations relevant to flanks of gear teeth
GB/T 10095.2-2008 Cylindrical gears—System of accuracy—Part 2: Definitions and allowable values of deviations relevant to radial composite deviations and runout information
GB/T 13306 Plates
GB/Z 18620.1 Cylindrical gears - Code of inspection practice - Part 1: Inspection of corresponding flanks of gear teeth
GB/Z18620.2 Cylindrical gears—Code of inspection practice—Part 2: Inspection related to radial composite deviations, runout, tooth thickness and backlash
GB/T 37400.1-2019 Heavy mechanical general technical specification - Part 1: Products inspection and test
GB/T 37400.10-2019 Heavy mechanical general technical specification - Part 10: Assembling
GB/T 37400.13-2019 Heavy mechanical general technical specification - Part 13: Packaging
GB/T 37682-2019 Large exposed gear steel castings - Technical specification
GB/T 37683-2019 Large gear and girth gear forgings - Technical specification
ISO 3448 Industrial liquid lubricants - ISO viscosity classification
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 3374.1 apply.
3.1
pinion
gear with fewer teeth in gear pair
3.2
Girth gear
gear with more teeth in gear pair
3.3
opening gear drives system
drives system, which is different from a closed gear box, consists of girth gears, pinions and lubrication systems supported by independent bearings. The rim of the girth gear adopts a closed structure, and the hub adopts an open structure
Note: the opening gear drives system has the characteristics of low speed, heavy load, large speed ratio and adjustable center distance, and its operating conditions, operating environment and lubrication conditions are poor.
3.4
contact pattern
engagement polishing marks distributed on the tooth surface of the assembled gear pair after running under the action of slight braking or load
Example: see Figure 1.
Figure 1 Schematic diagram for typical contact pattern
4 Type classification
The classification of opening gear drives systems is as follows:
——It is classified into opening spur gears and opening helical gears according to the shape of tooth trace;
——It is classified into two-petal, four-petal, and six-petal structures according to the structural form of girth gears;
——It is classified into flange installation method and spring plate installation method according to the installation method of girth gears.
Foreword i
Introduction iii
1 Scope
2 Normative references
3 Terms and definitions
4 Type classification
5 Technical requirements
6 Test methods
7 Inspection
8 Marking, packaging, transportation and storage
