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
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
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
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
