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NB/T 11450-2023Mining flameproof three-phase permanent magnet synchronous motorized pulley (English PDF)

矿用隔爆型三相永磁同步电动滚筒

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Issued by

NEA

Level / Type

Industry · Recommended

Issue date

December 28, 2023

Implementation date

June 28, 2024

Scope

NB/T 11450-2023 is the English-translated version of 矿用隔爆型三相永磁同步电动滚筒.

NB/T 11450-2023 is the Chinese energy industry standard for flameproof three-phase permanent magnet synchronous motorized pulleys, the outer-rotor drive drums of mine belt conveyors in which a permanent magnet rotor provides the excitation field.

It defines explosion-proof type and marking, model designation and basic parameters, then sets requirements for drum flaw detection, coating, static balance, surface speed deviation, radial runout, noise, vibration and overall efficiency.

Electrical tests include insulation resistance, turn-to-turn impulse withstand voltage, winding temperature rise, short-time overtorque, overspeed and no-load back electromotive force, alongside flameproof enclosure and cable entry tests.

It applies to pulleys driving belt conveyors in coal and non-coal mines. Issued on 28 December 2023, it has applied since 28 June 2024.

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Document preview — NB/T 11450-2023

National Standard of the People's Republic of China

ICS: 53.040.20
Classification: D 93

Issued by: National Energy Administration of the People's Republic of China

Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Types, classifications and basic parameters
4.1 Explosion-proof type and explosion-proof mark
4.2 Product model and its meaning
4.3 Basic parameters
5 Technical Requirements
5.1 General Provisions
5.2 Environmental conditions for use
5.3 Appearance requirements
5.4 Roller flaw detection
5.5 Performance
5.6 Electrical performance
5.7 Explosion-proof performance
6 Test methods
6.1 Test power supply
6.2 Test Instruments
6.3 Appearance Requirements Inspection
6.4 Roller flaw detection
6.5 Drum coating
6.6 Roller static balance test
6.7 Running stability test
6.8 Determination of surface linear velocity deviation rate
6.9 Measurement of radial runout of the outer circle
6.10 Noise Test
6.11 Vibration strength test
6.12 Overall efficiency test
6.13 Cooling water pipe pressure test
6.14 Determination of insulation resistance
6.15 Pressure resistance test
6.16 Turn-to-turn impulse withstand voltage test
6.17 Three-phase current unbalance measurement
6.18 Determination of DC resistance of stator winding
6.19 Winding temperature rise test
6.20 Load characteristics test
6.21 Short-time overtorque test
6.22 Overspeed test
6.23 No-load back electromotive force measurement
6.24 Thermal protection element inspection
6.25 Cyclic damp heat test
6.26 Flameproof parameter inspection
6.27 Grounding device inspection
6.28 Electrical clearance and creepage distance
6.29 Enclosure protection test
6.30 Shell impact test
6.31 Clamping and sealing performance and mechanical strength test of cable entry device
6.32 Heat and cold resistance test of non-metallic materials such as sealing rings
6.33 Chemical resistance test
6.34 Insulation sleeve torsion test
6.35 Shell static pressure performance test
6.36 Shell pressure resistance and internal ignition non-explosion test
6.37 Flame ablation test
6.38 Internal ignition without explosion test under stress state
7 Inspection Rules
7.1 Inspection category
7.2 Factory Inspection
7.3 Type inspection
8 Marking, packaging, transportation and storage
8.1 Sign
8.2 Packaging
8.3 Transportation and storage

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

1 Scope

This document specifies the types, classifications and basic parameters of flameproof three-phase permanent magnet synchronous electric drums for mining (hereinafter referred to as permanent magnet electric drums).

Numbers, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage, etc.

This document is applicable to flameproof permanent magnet electric rollers for belt conveyors in coal mines or non-coal mines, flameproof permanent magnet electric rollers for belt conveyors in other workplaces, The explosion-type permanent magnet electric roller shall be implemented for reference.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document.

GB/T 191 Pictorial markings for packaging, storage and transportation

GB/T 755-2019 Ratings and performance of rotating electrical machines

GB/T 2423.4 Environmental testing for electric and electronic products Part 2: Test method Test Db. Cyclic damp heat (12h 12h cycle ring)

GB/T 3836.1-2021 Explosive atmospheres Part 1: General requirements for equipment

GB/T 3836.2-2021 Explosive atmospheres Part 2: Equipment protected by flameproof enclosure "d"

GB/T 3836.3-2021 Explosive atmospheres Part 3: Equipment protected by increased safety "e"

GB/T 4942 Protection degree of rotating electrical machine integral structure (IP code) Classification

GB/T 10069.1-2006 Measurement methods and limits for noise from rotating electrical machines Part 1: Measurement methods for noise from rotating electrical machines

GB/T 10111 Generation of random numbers and their application in product quality sampling inspection

GB/T 10595-2017 Belt Conveyor

GB/T 13560 Sintered NdFeB Permanent Magnet Materials

GB/T 22669-2008 Test methods for three-phase permanent magnet synchronous motors

GB/T 22714 AC low voltage motor winding turn-to-turn insulation test specification

GB/T 22719.1 Interturn insulation of loose-fitting windings of AC low-voltage motors Part 1: Test methods

GB/T 34491 Surface coating of sintered NdFeB AQ1043 Mining Product Safety Signs and Labels

JB/T 7330-2018 Electric drum

MT/T 962-2019 Coatings for belt conveyor pulleys in coal mines

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 Permanent magnet synchronous motorized pulley

The utility model relates to a driving roller for a synchronous outer rotor belt conveyor, in which the stator adopts a distributed AC winding and the rotor uses a permanent magnet material to establish an excitation magnetic field.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 23 pages — is available in the English PDF.

Referenced standards

Normative references

MT/T 962-2019

Similar standards

GB/T 22711-2019|GB/T 22669-2008|GB/T 21967-2020|GB/T 21968-2020|GB/T 31234-2014|GB/T 23306-2009

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