GB/T 25337-2018 in English
VALIDRail heavy-duty maintenance machinery—General technical specifications
- Issued on:2018-05-14
- Implemented on:2018-12-01
- File Format:PDF
- Delivery:Within 1 day
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《GB/T 25337-2018铁路大型养路机械 通用技术条件》由347（国家铁路局）归口，主管部门为国家铁路局。
Introduction
In-depth interpretation of GB/T 25337-2018 "General Technical Requirements for Large Railway Maintenance Machinery"
Background of Standard Formulation and Analysis of Technical Evolution
GB/T 25337-2018 replaces the original GB/T25337-2010, and mainly optimizes and updates the use conditions, vehicle requirements and system components of large railway maintenance machinery. This revision focuses on the special needs in high-altitude environments, and adds technical requirements such as gearbox bench tests.
Comparison of standard frameworks
| Chapter | GB/T 25337—2010 | GB/T 25337—2018 |
|---|---|---|
| Use conditions | At altitudes up to 2000m, temperature range -10°C to +40°C | At altitudes up to 5000m, temperature range -25°C to +50°C |
| Vehicle requirements | Special requirements for high altitudes are not specified | Added requirements for sealing and low temperature resistance in high altitude environments |
| Powertrain | Only diesel engine emission standards are specified | Gearbox bench test and temperature rise control requirements are added |
Explanation of professional terms and practical application cases
Case study: Diesel engine performance optimization in high-altitude environment
In high-altitude areas, the decrease in atmospheric pressure will cause the diesel engine power to decrease. For this reason, GB/T 25337-2018 requires diesel engines to be equipped with a preheating system and ensure that their power can still meet the design requirements after correction. In actual applications, a certain type of road maintenance machinery can maintain more than 90% of the rated power at an altitude of 4000m by optimizing the air filter and heat dissipation device.
Implementation suggestions
- Before using in high-altitude areas, a comprehensive environmental adaptability test should be carried out.
- Regularly check the UV resistance of seals and hydraulic systems.
- Equip low-temperature batteries and ensure that the temperature rise control of the electrical system meets the requirements.
- Strengthen the sound insulation and heat insulation performance of the driver's cab and equip it with necessary oxygen production equipment.
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