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GB/T 33921-2017   Underground rubber-tyred mining machines--Performance requirements and test procedures for brake systems (English Version)
Standard No.: GB/T 33921-2017 Status:valid remind me the status change

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Implemented on:2018-2-1 Delivery: via email in 1 business day
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Standard No.: GB/T 33921-2017
English Name: Underground rubber-tyred mining machines--Performance requirements and test procedures for brake systems
Chinese Name: 地下轮胎式采矿车辆 制动系统的性能要求和试验方法
Chinese Classification: D90    Mining machinery equipment in general
Professional Classification: GB    National Standard
ICS Classification: 73.100.01 73.100.01    Mining equipment in general 73.100.01
Issued by: AQSIQ; SAC
Issued on: 2017-07-12
Implemented on: 2018-2-1
Status: valid
Language: English
File Format: PDF
Word Count: 10500 words
Price(USD): 260.0
Delivery: via email in 1 business day
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 standard is developed in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of SAC/TC 88 National Technical Committee on Mining Machinery of Standardization Administration of China. Underground rubber-tyred mining machines - Performance requirements and test procedures for brake systems 1 Scope This standard specifies the performance requirements and test procedures for brake systems of underground rubber-tyred mining machines. This standard is applicable to the following self-propelled rubber-tyred machines used for underground metal mines and other non-coal underground mines and in tunnel engineering: ——underground LHD; ——underground dumper/hauler (underground rubber-tyred mine-car); ——underground utility/service/support machine. 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 8595 Earth-moving machinery - Operators controls GB/T 10913 Earth-moving machinery - Determination of ground speed GB/T 15706 Safety of machinery - General principles for design - Risk assessment and risk reduction GB/T 21153-2007 Earth-moving machinery - Units for dimensions performance and capacities and their measurement accuracies ISO 15998 Earth-moving machinery - Machine-control systems (MCS) using electronic components - Performance criteria and tests for functional safety 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 brake system combination of all parts and components for braking and/or stopping the machine, including brake control, brake actuation system, brake and, if installed, retarder 3.1.1 service brake system main brake system used to brake and stop the machine 3.1.2 secondary brake system system that brakes the machine when the service brake system fails 3.1.3 parking brake system system that keeps the braked machine in place, which may also be part of the secondary brake system 3.1.4 hydrostatic brake system hydrostatic or other similar driving systems used to meet the requirements of one or more brake systems 3.1.5 Parts and components of brake system 3.1.5.1 brake control mechanism directly operated by the driver that generates a force transmitted to the brake 3.1.5.2 brake actuation system all parts and components located between the brake control and the brake and connecting the functions of the two 3.1.5.3 brake(s) device that directly applies a force to stop the movement of the machine Note: Types of brakes include friction type, mechanical type, electric type, regenerative device and hydrostatic or other fluid types. 3.1.5.4 common component component that performs the same function in two or more brake systems Note: For example, pedals and valves. 3.1.5.5 retarder energy absorption device commonly used to control machine speed. 3.2 hydrostatic drive system hydraulic system with the hydraulic motor directly driving the wheels to drive or decelerate the machine 3.3 Mass 3.3.1 operating mass operating mass of the main engine includes the combination of the following items when heaviest: the working devices and the no-load accessory devices specified by the manufacturer, the driver (75 kg), the fuel tank fully filled with fuel, and other liquid systems (i.e. hydraulic oil, transmission oil, engine lubricating oil, engine coolant) filled to the liquid level specified by the manufacturer 3.3.2 rated paymass (payload) rated mass that the machine can carry as stated by the manufacturer 3.3.3 gross machine mass sum of the operating mass and rated paymass of the machine 3.4 stopping distance s distance traveled by the machine on the test course from the time when the brake control acts (i.e. the driver applies the brake) to the time when the machine is completely stopped Notes: 1 The stopping distance is in m. 2 For the braking distance, the reaction time of the driver is not considered, but that of the system is considered. 3.5 mean deceleration a average rate of change of machine speed from the moment when the brake control starts to act to the moment when the vehicle stops completely Note: the average deceleration shall be calculated using Formula (1): (1) where, a——the average deceleration, m/s2; v——the instantaneous speed of the machine when the brake acts, m/s; s——the stopping distance, m. 3.6 burnishing treatment method to make the friction surface of the machine brake reach a good state 3.7 brake system pressure pressure of fluid at the brake control 3.8 brake application pressure measured fluid pressure applied to the brake 3.9 modulated braking braking mode capable of continuously or gradually increasing and decreasing the braking force by operating the brake control 3.10 test course pavement on which the machine is tested 3.11 cold brakes When the brake containing friction parts is in one of the following states: ——The brake has not worked for more than 1 h, except for the condition of carrying out applicable performance tests (see clause 7); ——When measuring the temperature of the outer surface of the brake disc or drum, the brake has cooled to 100℃ or below; ——For fully enclosed brakes, including oil-immersed brakes, the temperature measured on the outer surface of the casing closest to the brake is lower than 50℃, or within the range specified by the manufacturer. 3.12 maximum machine speed maximum speed determined in accordance with GB/T 10913 or equivalent standards 3.13 back throttling function of applying slight forward or backward force to hydrostatic or other similar driving systems to keep the machine stationary 3.14 safe state controlled device, process or system being manually or automatically stopped or switched to a mode after the failure of the machine's control system in order to avoid the machine accidental action or the potential danger caused by stored energy release 3.15 underground rubber-tyred mining machines rubber-tyred machines designed for underground mining operations to carry personnel or materials, or those running on their own power that lift or load materials with additional devices 3.15.1 underground LHD rubber-tyred machine for loading, lifting, transporting and dumping ores or materials with buckets in underground mines 3.15.2 underground dumper/hauler rubber-tyred machine with rigid frame or articulated frame that has open carriage and is used for underground transportation and dumping of ore or materials 3.15.3 underground utility/service/support machine self-propelled mining machines for general purpose that support the main production process of underground mining, such as concrete transport vehicles, concrete injection vehicles, explosive loading truck, mobile elevating work platforms, general service vehicles, skid anchor vehicles, personnel transport vehicles and other vehicles 3.15.4 trailer a kind of unpowered road vehicle designed such that the technical characteristics may be made normal use of when towed by a tractor and it is used for: ——carrying personnel and/or goods; ——special purposes. 3.16 fully developed deceleration rate maximum continuous deceleration developed by a machine on the designated slope with a constant gradient with specified test mass, ground conditions and initial machine speed (before deceleration) 3.17 peak deceleration maximum deceleration obtained during the brake operation test 3.18 machine control system; MCS assembly necessary to satisfy the system functions, including sensors, signal processing units, monitors, controllers and actuators or several of them Note: The scope of the system is not limited to the electronic controller, but is defined by the machine-related functions of the whole system, which generally includes electronic, non-electronic and connection equipment. Such system may include mechanical, hydraulic, optical or pneumatic elements/systems. 3.19 brake efficiency b percentage of the total braking force applied on the wheels to the weight of the complete machine 3.20 gradient G percentage of the elevation difference between two points in the straight line driving direction of a machine to the horizontal distance of the two points, which shall be calculated using Formula (2): G=tanθ×100% (2) where, G——the gradient, %; θ——the angle of gradient relative to the ground plane, °. 3.21 safety concept measures taken in allusion to system integrity during system (e.g., electronic unit) design to ensure safe operation in case of circuit failure, covering the condition of maintaining part of the work or providing backup systems for important machine functions 4 Accuracy of instruments The accuracy of the testing instruments shall meet the requirements of GB/T 21153-2007. According to the provisions of GB/T 21153-2007, the average of 3 measured values shall be taken as parameters which are not otherwise specified, and the measuring accuracy shall be as specified in Table 1. 5 General requirements 5.1 General provisions 5.1.1 The requirements of this clause apply to all of the machines covered within the scope of this standard. 5.1.2 Unless the hydraulic medium which can cause the brake to be applied in case of pressure-relief can be released when the driver is no longer in contact with the brake control, the device that maintains the brake applied via hydraulic pressure shall not be installed in any brake system. 5.1.3 The environmental pollution and impact of all brake systems that are designed, manufactured and installed shall be minimized.
Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Accuracy of instruments 5 General requirements 5.1 General provisions 5.2 Requirements for the brake system 5.3 Common component 5.4 Brake control 5.5 Service brake system 5.6 Holding performance 5.7 Secondary brake system 5.8 Parking brake system 5.9 Hydrostatic brake system 5.10 Accumulator performance and alarm device 5.11 Brake system with electronic machine control system (MCS) 5.12 Machines designed for drawbar trailers 5.13 Machine specification and labels 6 Test conditions 6.1 General parameter test 6.2 General test conditions 6.3 Test course 6.4 Configuration for machine test 7 Performance test 7.1 General requirements 7.2 Control of brake system 7.3 Accumulator 7.4 Holding performance test 7.5 Break performance 7.6 Alternative auxiliary brake tests for hydrostatic or similar driving machines 8 Test report
Referred in GB/T 33921-2017:
*GB/T 8595-2023 Earth-moving machinery—Operator’s controls
*GB/T 10913-2005 Steel roller chains, types S and C, attachments and sprockets
*GB/T 15706-2012 Safety of machinery — General principles for design - Risk assessment and risk reduction
*GB/T 21153-2007 Earth-moving machinery—Units for dimensions performance and capacities and their measurement accuracies
*GB/T 14184-1993 The methods of measurement for imageconverter tubes and image intensifier tubes
*GB/T 21361-2017 Motor vehicle air-conditioning unit
*GB/T 12843-1991 General principle of measuring methods of microprocessors and peripheral interface circuit parameters for semiconductor integrated circuits
*GB/T 34590.3-2017 Road vehicles - Functional safety - Part 3: Concept phase
*GB/T 11417.7-2012/XG1-2022 Ophthalmic optics―Contact lenses―Part 7:Physicochemical properties test methods, includes Amendment 1
*NB/T 47005-2009 Plate evaporator device
*JB/T 10506-2005 Internal combustion engines - Charge air coolers - Specification
*JB/T 9127-2000 Coiled helical compression springs shot-blasting technical specification
*GB/T 12362-2016 Steel die forgings--Tolerance and machining allowance
GB/T 33921-2017 is referred in:
*GB/T 34668-2017 Safety requirements and test methods for electrical self-balancing vehicles
*GB/T 16552-2017 Gems - Nomenclature
*GB/T 34443-2017 Terminology of artificial leather and synthetic leather
Code of China
Standard
GB/T 33921-2017  Underground rubber-tyred mining machines--Performance requirements and test procedures for brake systems (English Version)
Standard No.GB/T 33921-2017
Statusvalid
LanguageEnglish
File FormatPDF
Word Count10500 words
Price(USD)260.0
Implemented on2018-2-1
Deliveryvia email in 1 business day
Detail of GB/T 33921-2017
Standard No.
GB/T 33921-2017
English Name
Underground rubber-tyred mining machines--Performance requirements and test procedures for brake systems
Chinese Name
地下轮胎式采矿车辆 制动系统的性能要求和试验方法
Chinese Classification
D90
Professional Classification
GB
ICS Classification
Issued by
AQSIQ; SAC
Issued on
2017-07-12
Implemented on
2018-2-1
Status
valid
Superseded by
Superseded on
Abolished on
Superseding
Language
English
File Format
PDF
Word Count
10500 words
Price(USD)
260.0
Keywords
GB/T 33921-2017, GB 33921-2017, GBT 33921-2017, GB/T33921-2017, GB/T 33921, GB/T33921, GB33921-2017, GB 33921, GB33921, GBT33921-2017, GBT 33921, GBT33921
Introduction of GB/T 33921-2017
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 standard is developed in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of SAC/TC 88 National Technical Committee on Mining Machinery of Standardization Administration of China. Underground rubber-tyred mining machines - Performance requirements and test procedures for brake systems 1 Scope This standard specifies the performance requirements and test procedures for brake systems of underground rubber-tyred mining machines. This standard is applicable to the following self-propelled rubber-tyred machines used for underground metal mines and other non-coal underground mines and in tunnel engineering: ——underground LHD; ——underground dumper/hauler (underground rubber-tyred mine-car); ——underground utility/service/support machine. 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 8595 Earth-moving machinery - Operators controls GB/T 10913 Earth-moving machinery - Determination of ground speed GB/T 15706 Safety of machinery - General principles for design - Risk assessment and risk reduction GB/T 21153-2007 Earth-moving machinery - Units for dimensions performance and capacities and their measurement accuracies ISO 15998 Earth-moving machinery - Machine-control systems (MCS) using electronic components - Performance criteria and tests for functional safety 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 brake system combination of all parts and components for braking and/or stopping the machine, including brake control, brake actuation system, brake and, if installed, retarder 3.1.1 service brake system main brake system used to brake and stop the machine 3.1.2 secondary brake system system that brakes the machine when the service brake system fails 3.1.3 parking brake system system that keeps the braked machine in place, which may also be part of the secondary brake system 3.1.4 hydrostatic brake system hydrostatic or other similar driving systems used to meet the requirements of one or more brake systems 3.1.5 Parts and components of brake system 3.1.5.1 brake control mechanism directly operated by the driver that generates a force transmitted to the brake 3.1.5.2 brake actuation system all parts and components located between the brake control and the brake and connecting the functions of the two 3.1.5.3 brake(s) device that directly applies a force to stop the movement of the machine Note: Types of brakes include friction type, mechanical type, electric type, regenerative device and hydrostatic or other fluid types. 3.1.5.4 common component component that performs the same function in two or more brake systems Note: For example, pedals and valves. 3.1.5.5 retarder energy absorption device commonly used to control machine speed. 3.2 hydrostatic drive system hydraulic system with the hydraulic motor directly driving the wheels to drive or decelerate the machine 3.3 Mass 3.3.1 operating mass operating mass of the main engine includes the combination of the following items when heaviest: the working devices and the no-load accessory devices specified by the manufacturer, the driver (75 kg), the fuel tank fully filled with fuel, and other liquid systems (i.e. hydraulic oil, transmission oil, engine lubricating oil, engine coolant) filled to the liquid level specified by the manufacturer 3.3.2 rated paymass (payload) rated mass that the machine can carry as stated by the manufacturer 3.3.3 gross machine mass sum of the operating mass and rated paymass of the machine 3.4 stopping distance s distance traveled by the machine on the test course from the time when the brake control acts (i.e. the driver applies the brake) to the time when the machine is completely stopped Notes: 1 The stopping distance is in m. 2 For the braking distance, the reaction time of the driver is not considered, but that of the system is considered. 3.5 mean deceleration a average rate of change of machine speed from the moment when the brake control starts to act to the moment when the vehicle stops completely Note: the average deceleration shall be calculated using Formula (1): (1) where, a——the average deceleration, m/s2; v——the instantaneous speed of the machine when the brake acts, m/s; s——the stopping distance, m. 3.6 burnishing treatment method to make the friction surface of the machine brake reach a good state 3.7 brake system pressure pressure of fluid at the brake control 3.8 brake application pressure measured fluid pressure applied to the brake 3.9 modulated braking braking mode capable of continuously or gradually increasing and decreasing the braking force by operating the brake control 3.10 test course pavement on which the machine is tested 3.11 cold brakes When the brake containing friction parts is in one of the following states: ——The brake has not worked for more than 1 h, except for the condition of carrying out applicable performance tests (see clause 7); ——When measuring the temperature of the outer surface of the brake disc or drum, the brake has cooled to 100℃ or below; ——For fully enclosed brakes, including oil-immersed brakes, the temperature measured on the outer surface of the casing closest to the brake is lower than 50℃, or within the range specified by the manufacturer. 3.12 maximum machine speed maximum speed determined in accordance with GB/T 10913 or equivalent standards 3.13 back throttling function of applying slight forward or backward force to hydrostatic or other similar driving systems to keep the machine stationary 3.14 safe state controlled device, process or system being manually or automatically stopped or switched to a mode after the failure of the machine's control system in order to avoid the machine accidental action or the potential danger caused by stored energy release 3.15 underground rubber-tyred mining machines rubber-tyred machines designed for underground mining operations to carry personnel or materials, or those running on their own power that lift or load materials with additional devices 3.15.1 underground LHD rubber-tyred machine for loading, lifting, transporting and dumping ores or materials with buckets in underground mines 3.15.2 underground dumper/hauler rubber-tyred machine with rigid frame or articulated frame that has open carriage and is used for underground transportation and dumping of ore or materials 3.15.3 underground utility/service/support machine self-propelled mining machines for general purpose that support the main production process of underground mining, such as concrete transport vehicles, concrete injection vehicles, explosive loading truck, mobile elevating work platforms, general service vehicles, skid anchor vehicles, personnel transport vehicles and other vehicles 3.15.4 trailer a kind of unpowered road vehicle designed such that the technical characteristics may be made normal use of when towed by a tractor and it is used for: ——carrying personnel and/or goods; ——special purposes. 3.16 fully developed deceleration rate maximum continuous deceleration developed by a machine on the designated slope with a constant gradient with specified test mass, ground conditions and initial machine speed (before deceleration) 3.17 peak deceleration maximum deceleration obtained during the brake operation test 3.18 machine control system; MCS assembly necessary to satisfy the system functions, including sensors, signal processing units, monitors, controllers and actuators or several of them Note: The scope of the system is not limited to the electronic controller, but is defined by the machine-related functions of the whole system, which generally includes electronic, non-electronic and connection equipment. Such system may include mechanical, hydraulic, optical or pneumatic elements/systems. 3.19 brake efficiency b percentage of the total braking force applied on the wheels to the weight of the complete machine 3.20 gradient G percentage of the elevation difference between two points in the straight line driving direction of a machine to the horizontal distance of the two points, which shall be calculated using Formula (2): G=tanθ×100% (2) where, G——the gradient, %; θ——the angle of gradient relative to the ground plane, °. 3.21 safety concept measures taken in allusion to system integrity during system (e.g., electronic unit) design to ensure safe operation in case of circuit failure, covering the condition of maintaining part of the work or providing backup systems for important machine functions 4 Accuracy of instruments The accuracy of the testing instruments shall meet the requirements of GB/T 21153-2007. According to the provisions of GB/T 21153-2007, the average of 3 measured values shall be taken as parameters which are not otherwise specified, and the measuring accuracy shall be as specified in Table 1. 5 General requirements 5.1 General provisions 5.1.1 The requirements of this clause apply to all of the machines covered within the scope of this standard. 5.1.2 Unless the hydraulic medium which can cause the brake to be applied in case of pressure-relief can be released when the driver is no longer in contact with the brake control, the device that maintains the brake applied via hydraulic pressure shall not be installed in any brake system. 5.1.3 The environmental pollution and impact of all brake systems that are designed, manufactured and installed shall be minimized.
Contents of GB/T 33921-2017
Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Accuracy of instruments 5 General requirements 5.1 General provisions 5.2 Requirements for the brake system 5.3 Common component 5.4 Brake control 5.5 Service brake system 5.6 Holding performance 5.7 Secondary brake system 5.8 Parking brake system 5.9 Hydrostatic brake system 5.10 Accumulator performance and alarm device 5.11 Brake system with electronic machine control system (MCS) 5.12 Machines designed for drawbar trailers 5.13 Machine specification and labels 6 Test conditions 6.1 General parameter test 6.2 General test conditions 6.3 Test course 6.4 Configuration for machine test 7 Performance test 7.1 General requirements 7.2 Control of brake system 7.3 Accumulator 7.4 Holding performance test 7.5 Break performance 7.6 Alternative auxiliary brake tests for hydrostatic or similar driving machines 8 Test report
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Keywords:
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