GB/T 33625-2017 in English
VALIDOil-free reciprocating air compressors on locomotives and power cars
- Issued on:2017-05-12
- Implemented on:2017-12-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$136.00
《GB/T 33625-2017机车、动车用全无油润滑往复活塞空气压缩机》由TC145（全国压缩机标准化技术委员会）归口，主管部门为中国机械工业联合会。
Introduction
GB/T 33625—2017 Standard Overview
GB/T 33625—2017 "Fully Oil-free Lubricated Reciprocating Piston Air Compressors for Locomotives and EMUs" is a technical specification for oil-free lubricated piston air compressors used in railway locomotives and EMUs, aiming to ensure their performance, safety and reliability. This standard applies to air compressors with a rated exhaust pressure not exceeding $1.0\mathrm{MPa}$.
Background of Standard Formulation
With the advancement of railway transportation technology, locomotives and EMUs have increasing requirements for air compression systems. Traditional lubrication methods have pollution risks, while the introduction of fully oil-free lubrication technology not only improves equipment reliability, but also meets environmental protection requirements. Therefore, this standard came into being, providing a unified technical basis for the production and application of oil-free lubricated air compressors.
Core technical requirements
| Project | Specific requirements |
|---|---|
| Working conditions | Suction pressure: $0.1~\mathrm{MPa}$ (absolute pressure); Suction temperature: $20~\mathrm{^\circ C}$; Working voltage: $\mathrm{DC}110\mathrm{V}$ |
| Performance indicators | Rated exhaust pressure: $0.8~\mathrm{MPa}$; actual volume flow rate is not less than $95\%$ of the nominal flow rate; input specific power is not greater than $11.0~\mathrm{kW}/(\mathrm{m}^{3}\cdot\mathrm{min}^{-1})$ |
| Environmental adaptability | Applicable to altitude not exceeding $2500\mathrm{m}$, operating temperature range: $-40~70\mathrm{^\circ C}$ inside the vehicle, $-40~50\mathrm{^\circ C}$ outside the vehicle |
Comparison of test methods and standards
The test requirements of this standard strictly follow the relevant national standards and industry standards to ensure that the air compressor meets the requirements in terms of performance, noise, vibration, etc. The following comparison table shows its technical advantages:
| Dimensions | Requirements of this standard | Comparison standards |
|---|---|---|
| Noise control | Noise limits specified in $\mathrm{JB/T8934}$ | General requirements of industry standards |
| Protection level | $\mathrm{IP54}$ or $\mathrm{IP65}$ | General requirements of GB/T 4208 |
| Material requirements | Aluminum alloy and cast iron parts comply with GB/T 9438 and JB/T 6431 | Basic material standards |
Implementation recommendations and precautions
Precautions in practical applications
1. Installation environment: Ensure that the air compressor is installed in an environment that meets the operating temperature and humidity requirements, and avoid long-term operation under extreme conditions.
2. Maintenance: Regularly check the sealing of pressure-bearing parts such as cylinders and joints to ensure that there is no leakage. It is recommended to conduct a comprehensive inspection once a year and replace wearing parts.
3. Power management: Note that the operating voltage range of the air compressor is $77~137.5\mathrm{V}$, and avoid excessive voltage fluctuations that affect equipment performance.
4. Safety protection: Ensure that exposed moving parts are equipped with safety protection covers in accordance with the requirements of GB 22207 to ensure the safety of operators.
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