TB/T 3458-2016 in English
VALIDFront hatch mechanism of EMU/DMU
- Issued on:2016-09-30
- Implemented on:2017-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
| Standard No: | TB/T 3458-2016 |
| Document status: | VALID |
| Title in English: | Front hatch mechanism of EMU/DMU |
| Title in Chinese: | 动车组前面端开闭机构 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2016-09-30 |
| Implemented on: | 2017-04-01 |
| Professional Classification: | TB-Railway Transport |
| Related Keywords: | closing mechanism
automatic mechanism front hatch mechanism manual mechanism mechanism |
| Related Topics: | tb/t 1961-2016
front end tb/t3441-2016 tb/t3367-2016 tb/t2993.5-2016 Front-end circuit tb/t3440-2016 EMU front end opening and closing mechanism Open and close joints tb/t 3466-2016 tb/t 3432-2016 |
Introduction
Analysis of the core content of the standard
This standard specifies the technical requirements for the full life cycle of the front-end opening and closing mechanism of EMUs, with the focus on:
- Dual-bearing structure design: two load-bearing schemes: metal frame and fiberglass
- Operation mode classification: automatic mechanism (≤30s to complete the action) and manual mechanism (≤5min operation)
- Adaptation to extreme environments: -40℃~+40℃ operating temperature range
Comparison of key technical indicators
| Parameter category | Metal frame type | Fiberglass type | Test standard |
|---|---|---|---|
| Longitudinal compression load | ≥10kN | - | Clause 6.5 |
| Vibration shock level | Determined by negotiation | IEC 61373 Class 1 Level A | Clause 6.9 |
| Material strength | As per drawing | Tensile ≥100MPa Bending ≥150MPa | Clause 6.11 |
Key requirements for electrical system
The electrical system of the automatic opening and closing mechanism must meet the following requirements:
- Insulation resistance classification: high voltage circuit ≥5MΩ, low voltage circuit ≥1MΩ
- Protection level: IP65 waterproof and dustproof
- Withstand voltage test: 1500V/1min (AC225V and above system)
Typical case: A certain type of EMU adopts dual redundant position sensor to ensure 100% reliable transmission of opening and closing state signals.
Standard evolution background
As the speed of EMU increases to 200km/h+, traditional opening and closing mechanisms face:
- Pneumatic load increases by more than 50%
- Electrical system electromagnetic compatibility issues become prominent
- Requirements for extreme climate adaptability increase
This standard clarifies the quantitative indicators of FRP materials for the first time, filling the application gap of composite materials.
Implementation suggestions
- New vehicles: give priority to automatic opening and closing mechanisms, and reserve manual emergency interfaces
- Inspection and maintenance: focus on the oxidation of electrical contacts (5,000km inspection cycle is recommended)
- Material selection: -40℃ grade fiberglass formula is recommended for high-cold lines
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