TB/T 3145-2018 in English
VALIDLocomotive brake units
- Issued on:2018-07-31
- Implemented on:2019-02-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
| Standard No: | TB/T 3145-2018 |
| Document status: | VALID |
| Title in English: | Locomotive brake units |
| Title in Chinese: | 机车单元制动器 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2018-07-31 |
| Implemented on: | 2019-02-01 |
| Superseding: |
TB/T 3145-2007 Locomotive brake unit
|
| Professional Classification: | TB-Railway Transport |
| Related Keywords: | locomotive brake units introduction standard evolution
locomotive unit brake brake cylinder pressure brake shoe pressure/theoretical brake shoe pressure |
| Related Topics: | locomotive
brake Multiplexer Unit tb/t3145 tb t 3145 2007 tb/t3145-2007 tb /t3145 unit brake car brake locomotive brake TB/T 3474.2-2018 tb/t3539-2018 tb/t 3145-2018 |
Introduction
Standard Evolution and Core Changes
| Technical Indicators | Requirements of 2007 Edition | Requirements of 2018 Edition | Range of Change |
|---|---|---|---|
| Oil Leakage at Normal Temperature | Not Clear | ≤10kPa/3min | New Quantitative Indicators |
| Screw Adjustment (Low Temperature) | Not Specified | ≥2mm | New Low Temperature Working Conditions |
| Static Transmission Efficiency | Not Clear | ≥85% | New performance indicators |
Analysis of key technical requirements
Environmental adaptability
The standard clearly requires that the locomotive unit brake maintain normal working ability under harsh conditions such as -40℃ to +50℃ ambient temperature, 95% relative humidity and salt spray/dust.
Braking performance parameters
η=(measured brake shoe pressure/theoretical brake shoe pressure)×100%, where the theoretical value=brake cylinder pressure×piston area×braking ratio
Innovation in detection methods
Graded air tightness test
Newly addedFour-stage detection method:
1. Normal temperature and low pressure (100kPa)
2. Normal temperature and high pressure (500kPa)
3. Low temperature and low pressure (-40℃)
4. Low temperature and high pressure (-40℃)
Fatigue test standards
| Brake type | Number of tests | Pressure range |
|---|---|---|
| Basic type | 5×10⁵times | 400-500kPa |
| With parking function | 1×10⁴times | 550-900kPa |
Implementation suggestions
Manufacturing process
Steel castings must comply with GB/T 11352 standard. If no tolerance is noted, GB/T 6414-CT9 grade shall be implemented. Pay special attention to the selection of material toughness under -40℃ working conditions.
Quality Control
It is recommended to establish a three-dimensional testing system:
1. Factory mandatory inspection items (appearance/normal temperature performance)
2. Periodic type inspection (vibration/fatigue)
3. Extreme environment random inspection (low temperature/salt spray)
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