This part of GB/T 35060 specifies the requirements, test methods, inspection rules, as well as marking, packaging, transportation and storage of the cutting transmission unit of shearer for the underground coal mining working face.
This part is applicable to the cutting transmission unit of shearer used by longwall mining (hereinafter referred to as “shearer”).
2 Normative references
The following referenced documents are indispensable for the application 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 3480.5 Calculation of load capacity of spur and helical gears - Part 5: Strength and quality of materials
GB/T 7233.1-2009 Steel castings - Ultrasonic examination - Part 1: Steel castings for general purposes
GB/T 9450 Steels - Determination and verification of the depth of carburized and hardened cases
GB/T 10111 Generation of random numbers and procedures applied to sampling inspection for product quality
GB/T 11352-2009 Carbon steel castings for general engineering purpose
GB/T 11354 Determination of nitrided case depth and metallographic microstructure examination for steel and iron parts
GB/T 11365 Accuracy of bevel and hypoid gears
GB/T 13306 Plates
GB/T 13384 General specifications for packing of mechanical and electrical product
GB/T 13924 Inspection code for accuracy of involute cylindrical gears
GB/T 35060.1 General specification of shearer - Part 1: Complete machine
JB/T 5000.10 Heavy mechanical general techniques and standards - Part 10: Assembly
JB/T 5943 Construction machinery - General specifications for welding parts
JB/T 8831 Methods for oil selection of industrial enclosed gears
JB/T 9172 Gear nitriding and nitrocarburizing process and its quality control
MT/T 784 DO type floating seals for winning machinery
3 Requirements
3.1 General requirements
3.1.1 The cutting transmission unit shall be manufactured according to the drawings and technical documents approved by prescribed procedures.
3.1.2 Raw materials used for manufacturing the cutting transmission unit shall meet the drawing requirements.
3.1.3 The model, specification and performance of standard parts and procured parts shall meet the design requirements.
3.1.4 Parts processed according to the design drawings shall pass the inspection.
3.2 Assembling requirements
3.2.1 The assembling shall meet the requirements of JB/T 5000.10.
3.2.2 The shell shall meet the following requirements:
a) the quality grade of steel castings meets the requirements of Grade II quality criteria specified in GB/T 7233.1-2009, Clause 5;
b) the surface quality of steel castings meets the requirements of GB/T 11352-2009, 4.5;
c) the quality of welding parts meets the requirements of JB/T 5943;
d) there is no viscous sand, welding slag, scrap iron, oil stain and other foreign matters in the shell;
e) the pressure-bearing shell and waterway pipeline are free from leakage after subjecting to the pressure test at a pressure that is 1.5 times of the rated pressure for 5min;
f) the shell used as oil tank shall not leak before assembly;
g) rust-proof treatment shall be carried out for the shell.
3.2.3 The gear shall meet the following requirements:
a) the gear materials and heat treatment quality shall be inspected according to GB/T 3480.5, GB/T 9450, GB/T 11354 and JB/T 9172;
b) the accuracy of involute cylindrical gears shall be inspected according to GB/T 13924;
c) the accuracy of bevel gears shall be inspected according to GB/T 11365;
d) the gear surface hardness, effective hardened layer depth, metallographic structure and machining accuracy shall meet the requirements of product technical documents.
3.2.4 The axial clearance of axle groups shall meet the requirements of product drawing documents.
3.2.5 The adopted DO type floating seals shall meet the requirements of MT/T 784.
3.2.6 All parts shall be cleaned and washed before assembly.
3.2.7 The selection of lubricating oil shall meet the requirements of JB/T 8831.
3.2.8 Fasteners shall be tightened according to specified torque.
3.3 Appearance requirements
The outer surface of the cutting transmission unit shall be smooth and free of sharp edges, flashes, burrs, cracks and other defects, and shall be sprayed (coated) with anti-rust primer according to the drawing requirements. The paint surface shall be uniform in thickness and firm in combination without peeling and falling off.
3.4 Performance requirements
3.4.1 Operation of clutch mechanism
The clutch mechanism shall be flexible in operation, full in stroke and reliable in action.
3.4.2 No-load running
The no-load running shall meet the following requirements:
a) operating stably without abnormal vibration, noise and temperature rise;
b) no leakage at each joint surface and seal;
c) no fastener looseness on each connection surface;
d) the turning direction of the output shaft meets the design requirements;
e) the output shaft speed meets the requirements of design (technical documents for supply).
3.4.3 Temperature rise
After continuous and stable running according to the test method specified in 4.2.4, there shall be no leakage at each joint seal, the maximum oil temperature in oil tank shall not exceed 100℃, and the maximum temperature rise shall not exceed 75K.
3.4.4 Overload
After loading at 125% of the rated power of the cutting (main) motor for 10min, the operation shall be stable, without violent vibration, abnormal noise and temperature rise.
3.5 Mass
The mass shall meet the design requirements, with an error not exceeding ±5%.
GB/T 35060.2-2018 The following standards are cited：
