Backup System and Tunnel Services
AssemblyA train of steel decks towed behind the machine that carries its power, hydraulics, conveyors and services, and supplies the tunnel behind it with fresh air, water, compressed air, drainage and material handling, plus a refuge chamber for the crew. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Backup System and Tunnel Services parts and their functions
13 top-level parts · 489 parts in total · full bill of materials below
| # | Part | Qty | What it does |
|---|---|---|---|
| 1 | Backup Bridge | 1× | Links the machine to the backup and leaves the floor clear for track or invert |
| 2 | Backup Deck | 8× | Carry the backup equipment over the supply track |
| 3 | Backup Wheel Set | 16× | Carry the decks on the track. Two per deck |
| 4 | Material Handling Crane | 1× | Unloads supplies from the train and carries them forward |
| 5 | Electric Chain Hoist 9 parts | 4× | Lift cutters, ring beams and parts at the front of the machine and on the decks |
| 6 | Ventilation Duct Cassette | 1× | Extends the ventilation duct as the machine advances |
| 7 | Tunnel Ventilation Fan 7 parts | 1× | Boosts the fresh air flow at the backup |
| 8 | Dust Scrubber 4 parts | 1× | Removes rock dust from the air drawn from the cutterhead |
| 9 | Water Supply and Cooling 4 parts | 1× | Supplies water and removes heat from the machine |
| 10 | Dewatering Pump | 2× | Pump water inflow away from the work zone |
| 11 | Rotary Screw Air Compressor 9 parts | 1× | Supplies compressed air for tools, shotcrete nozzles and air-operated pumps |
| 12 | Refuge Chamber | 1× | Shelters the crew in a fire or gas emergency |
| 13 | Workshop and Spares Store | 1× | Keeps tools and spares close to the cutterhead |
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Bill of materials for Backup System and Tunnel Services
13 top-level lines · 158 rows shown · 489 parts total · indented to 3 levels| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Backup Bridge | main-beam-tbm-backup-bridge | 1× | 1 | · | part |
| 2 | Backup Deck | main-beam-tbm-backup-deck | 8× | 8 | · | part |
| 3 | Backup Wheel Set | main-beam-tbm-backup-wheel-set | 16× | 16 | · | part |
| 4 | Material Handling Crane | main-beam-tbm-material-crane | 1× | 1 | · | part |
| 5 | Electric Chain Hoist 9 parts | chain-hoist | 4× | 4 | 83 | product |
| 5.1 | Brake Motor Assembly 6 parts | chain-hoist-brake-motor | 1× | 4 | 36 | assembly |
| 5.1.1 | Stator Assembly 3 parts + deeper › | stator-assembly | 1× | 4 | 3 | assembly |
| 5.1.2 | Rotor Assembly 4 parts + deeper › | rotor-assembly | 1× | 4 | 19 | assembly |
| 5.1.3 | Ball Bearing | ball-bearing | 2× | 8 | · | part |
| 5.1.4 | DC Disc Brake 5 parts + deeper › | chain-hoist-brake-unit | 1× | 4 | 10 | assembly |
| 5.1.5 | Motor Cooling Fan | chain-hoist-cooling-fan | 1× | 4 | · | part |
| 5.1.6 | Motor Housing | motor-housing | 1× | 4 | · | part |
| 5.2 | Reduction Gearbox 6 parts | chain-hoist-gearbox | 1× | 4 | 10 | assembly |
| 5.2.1 | Helical Gear Pair | gear-pair | 2× | 8 | · | part |
| 5.2.2 | Output Shaft | chain-hoist-output-shaft | 1× | 4 | · | part |
| 5.2.3 | Ball Bearing | ball-bearing | 3× | 12 | · | part |
| 5.2.4 | Oil Seal | oil-seal | 2× | 8 | · | part |
| 5.2.5 | Gearbox Housing | gearbox-housing | 1× | 4 | · | part |
| 5.2.6 | Friction Slip Clutch | chain-hoist-slip-clutch | 1× | 4 | · | part |
| 5.3 | Chain Drive Assembly 5 parts | chain-hoist-chain-drive | 1× | 4 | 5 | assembly |
| 5.3.1 | Lift Wheel (Load Sheave) | chain-hoist-lift-wheel | 1× | 4 | · | part |
| 5.3.2 | Chain Guide | chain-hoist-chain-guide | 1× | 4 | · | part |
| 5.3.3 | Load Chain | chain-hoist-load-chain | 1× | 4 | · | part |
| 5.3.4 | Chain End Stop | chain-hoist-chain-stop | 1× | 4 | · | part |
| 5.3.5 | Chain Stripper | chain-hoist-stripper | 1× | 4 | · | part |
| 5.4 | Bottom Hook Block 5 parts | chain-hoist-hook-block | 1× | 4 | 5 | assembly |
| 5.4.1 | Forged Bottom Hook | chain-hoist-bottom-hook | 1× | 4 | · | part |
| 5.4.2 | Hook Safety Latch | chain-hoist-safety-latch | 1× | 4 | · | part |
| 5.4.3 | Ball Bearing | ball-bearing | 1× | 4 | · | part |
| 5.4.4 | Hook Block Housing | chain-hoist-hook-housing | 1× | 4 | · | part |
| 5.4.5 | Fastener Set | fastener-set | 1× | 4 | · | part |
| 5.5 | Suspension Assembly 3 parts | chain-hoist-suspension | 1× | 4 | 3 | assembly |
| 5.5.1 | Top Suspension Hook | chain-hoist-top-hook | 1× | 4 | · | part |
| 5.5.2 | Suspension Lug | chain-hoist-suspension-lug | 1× | 4 | · | part |
| 5.5.3 | Fastener Set | fastener-set | 1× | 4 | · | part |
| 5.6 | Chain Container 3 parts | chain-hoist-chain-container | 1× | 4 | 3 | assembly |
| 5.6.1 | Chain Bag | chain-hoist-chain-bag | 1× | 4 | · | part |
| 5.6.2 | Bag Bracket | chain-hoist-bag-bracket | 1× | 4 | · | part |
| 5.6.3 | Fastener Set | fastener-set | 1× | 4 | · | part |
| 5.7 | Electrical Panel 7 parts | chain-hoist-electrical-panel | 1× | 4 | 11 | assembly |
| 5.7.1 | Relay | relay | 2× | 8 | · | part |
| 5.7.2 | Control Transformer | chain-hoist-control-transformer | 1× | 4 | · | part |
| 5.7.3 | Hook Travel Limit Switch | chain-hoist-limit-switch | 2× | 8 | · | part |
| 5.7.4 | Bare PCB | pcb-bare | 1× | 4 | · | part |
| 5.7.5 | Wire Bundle | wire-bundle | 1× | 4 | · | part |
| 5.7.6 | Connector | connector | 3× | 12 | · | part |
| 5.7.7 | Thermal Fuse | thermal-fuse | 1× | 4 | · | part |
| 5.8 | Pendant Control Station 4 parts | chain-hoist-pendant | 1× | 4 | 5 | assembly |
| 5.8.1 | Pendant Housing | chain-hoist-pendant-housing | 1× | 4 | · | part |
| 5.8.2 | Direction Pushbutton | chain-hoist-pushbutton | 2× | 8 | · | part |
| 5.8.3 | Emergency Stop Button | chain-hoist-estop | 1× | 4 | · | part |
| 5.8.4 | Pendant Cable | chain-hoist-pendant-cable | 1× | 4 | · | part |
| 5.9 | Hoist Body and Covers 4 parts | chain-hoist-housing | 1× | 4 | 5 | assembly |
| 5.9.1 | Main Body Casting | chain-hoist-main-body | 1× | 4 | · | part |
| 5.9.2 | End Cover | chain-hoist-end-cover | 2× | 8 | · | part |
| 5.9.3 | O-Ring Set | oring-set | 1× | 4 | · | part |
| 5.9.4 | Fastener Set | fastener-set | 1× | 4 | · | part |
| 6 | Ventilation Duct Cassette | main-beam-tbm-duct-cassette | 1× | 1 | · | part |
| 7 | Tunnel Ventilation Fan 7 parts | tunnel-ventilation-fan | 1× | 1 | 33 | product |
| 7.1 | Fan Impeller Assembly 5 parts | tunnel-ventilation-fan-impeller | 1× | 1 | 7 | assembly |
| 7.1.1 | Impeller Hub | tunnel-ventilation-fan-hub | 1× | 1 | · | part |
| 7.1.2 | Impeller Blade Set | tunnel-ventilation-fan-blades | 1× | 1 | · | part |
| 7.1.3 | Main Rotating Shaft | tunnel-ventilation-fan-shaft | 1× | 1 | · | part |
| 7.1.4 | Ball Bearing | ball-bearing | 2× | 2 | · | part |
| 7.1.5 | Oil Seal | oil-seal | 2× | 2 | · | part |
| 7.2 | Electric Drive Motor 5 parts | tunnel-ventilation-fan-motor | 1× | 1 | 5 | assembly |
| 7.2.1 | Motor Stator Winding | tunnel-ventilation-fan-motor-stator | 1× | 1 | · | part |
| 7.2.2 | Motor Rotor Cage | tunnel-ventilation-fan-motor-rotor | 1× | 1 | · | part |
| 7.2.3 | Motor Housing (Stator) | tunnel-ventilation-fan-motor-housing | 1× | 1 | · | part |
| 7.2.4 | Flexible Motor Coupling | tunnel-ventilation-fan-flexible-coupling | 1× | 1 | · | part |
| 7.2.5 | IGBT Power Module | igbt-module | 1× | 1 | · | part |
| 7.3 | Fan Casing and Volute 4 parts | tunnel-ventilation-fan-casing | 1× | 1 | 5 | assembly |
| 7.3.1 | Inlet Ring with Diffuser | tunnel-ventilation-fan-inlet-ring | 1× | 1 | · | part |
| 7.3.2 | Volute Casing | tunnel-ventilation-fan-volute-body | 1× | 1 | · | part |
| 7.3.3 | Discharge Flange Connection | tunnel-ventilation-fan-discharge-flange | 1× | 1 | · | part |
| 7.3.4 | Fastener Set | fastener-set | 2× | 2 | · | part |
| 7.4 | Inlet Silencer Unit 3 parts | tunnel-ventilation-fan-inlet-silencer | 1× | 1 | 3 | assembly |
| 7.4.1 | Silencer Outer Shell | tunnel-ventilation-fan-silencer-shell | 1× | 1 | · | part |
| 7.4.2 | Acoustic Absorption Material | tunnel-ventilation-fan-acoustic-lining | 1× | 1 | · | part |
| 7.4.3 | Sound-Absorbing Baffles | tunnel-ventilation-fan-baffle-plates | 1× | 1 | · | part |
| 7.5 | Outlet Silencer Unit 3 parts | tunnel-ventilation-fan-outlet-silencer | 1× | 1 | 3 | assembly |
| 7.5.1 | Acoustic Expansion Chamber | tunnel-ventilation-fan-expansion-chamber | 1× | 1 | · | part |
| 7.5.2 | Outlet Absorptive Lining | tunnel-ventilation-fan-absorptive-material | 1× | 1 | · | part |
| 7.5.3 | Pressure Sensor | pressure-sensor | 1× | 1 | · | part |
| 7.6 | Tunnel Mounting System 4 parts | tunnel-ventilation-fan-jet-mount | 1× | 1 | 5 | assembly |
| 7.6.1 | Mounting Bracket Frame | tunnel-ventilation-fan-bracket-frame | 1× | 1 | · | part |
| 7.6.2 | Vibration Isolation Mounts | tunnel-ventilation-fan-vibration-isolators | 1× | 1 | · | part |
| 7.6.3 | Support and Guide Cables | tunnel-ventilation-fan-guide-wires | 1× | 1 | · | part |
| 7.6.4 | Fastener Set | fastener-set | 2× | 2 | · | part |
| 7.7 | Fan Control and Monitoring 5 parts | tunnel-ventilation-fan-control | 1× | 1 | 5 | assembly |
| 7.7.1 | Variable-Frequency Drive Cabinet | tunnel-ventilation-fan-vfd | 1× | 1 | · | part |
| 7.7.2 | Fan Speed Sensor | tunnel-ventilation-fan-speed-sensor | 1× | 1 | · | part |
| 7.7.3 | Pressure Transducer | tunnel-ventilation-fan-pressure-transducer | 1× | 1 | · | part |
| 7.7.4 | Local Control Panel | tunnel-ventilation-fan-control-panel | 1× | 1 | · | part |
| 7.7.5 | Hall Sensor | hall-sensor | 1× | 1 | · | part |
| 8 | Dust Scrubber 4 parts | main-beam-tbm-dust-scrubber | 1× | 1 | 4 | assembly |
| 8.1 | Scrubber Fan | main-beam-tbm-scrubber-fan | 1× | 1 | · | part |
| 8.2 | Scrubber Filter Stage | main-beam-tbm-scrubber-filter | 1× | 1 | · | part |
| 8.3 | Dust Extraction Duct | main-beam-tbm-scrubber-duct | 1× | 1 | · | part |
| 8.4 | Scrubber Dust Discharge | main-beam-tbm-dust-discharge | 1× | 1 | · | part |
| 9 | Water Supply and Cooling 4 parts | main-beam-tbm-water-system | 1× | 1 | 5 | assembly |
| 9.1 | Water Hose Reel | main-beam-tbm-water-hose-reel | 1× | 1 | · | part |
| 9.2 | Water Tank | main-beam-tbm-water-tank | 1× | 1 | · | part |
| 9.3 | Water Booster Pump | main-beam-tbm-water-pump | 2× | 2 | · | part |
| 9.4 | Plate Heat Exchanger | main-beam-tbm-heat-exchanger | 1× | 1 | · | part |
| 10 | Dewatering Pump | main-beam-tbm-dewatering-pump | 2× | 2 | · | part |
| 11 | Rotary Screw Air Compressor 9 parts | screw-compressor | 1× | 1 | 84 | product |
| 11.1 | Airend 7 parts | screw-compressor-airend | 1× | 1 | 12 | assembly |
| 11.1.1 | Male Rotor | screw-compressor-male-rotor | 1× | 1 | · | part |
| 11.1.2 | Female Rotor | screw-compressor-female-rotor | 1× | 1 | · | part |
| 11.1.3 | Airend Housing | screw-compressor-airend-housing | 1× | 1 | · | part |
| 11.1.4 | Ball Bearing | ball-bearing | 4× | 4 | · | part |
| 11.1.5 | Thrust Bearing | screw-compressor-thrust-bearing | 2× | 2 | · | part |
| 11.1.6 | Oil Seal | oil-seal | 2× | 2 | · | part |
| 11.1.7 | O-Ring Set | oring-set | 1× | 1 | · | part |
| 11.2 | Drive Motor 5 parts | screw-compressor-drive-motor | 1× | 1 | 26 | assembly |
| 11.2.1 | Stator Assembly 3 parts + deeper › | stator-assembly | 1× | 1 | 3 | assembly |
| 11.2.2 | Rotor Assembly 4 parts + deeper › | rotor-assembly | 1× | 1 | 19 | assembly |
| 11.2.3 | Copper Winding | copper-winding | 1× | 1 | · | part |
| 11.2.4 | Motor Housing | motor-housing | 1× | 1 | · | part |
| 11.2.5 | Ball Bearing | ball-bearing | 2× | 2 | · | part |
| 11.3 | Drive Transmission 4 parts | screw-compressor-drive | 1× | 1 | 6 | assembly |
| 11.3.1 | Drive Belt | drive-belt | 2× | 2 | · | part |
| 11.3.2 | Drive Pulley | screw-compressor-pulley | 2× | 2 | · | part |
| 11.3.3 | Drive Coupling | screw-compressor-coupling | 1× | 1 | · | part |
| 11.3.4 | Belt Tensioner | screw-compressor-belt-tensioner | 1× | 1 | · | part |
| 11.4 | Oil System 5 parts | screw-compressor-oil-system | 1× | 1 | 10 | assembly |
| 11.4.1 | Oil Separator Tank 3 parts + deeper › | screw-compressor-oil-separator | 1× | 1 | 3 | assembly |
| 11.4.2 | Oil Filter | screw-compressor-oil-filter | 1× | 1 | · | part |
| 11.4.3 | Thermostatic Valve | screw-compressor-thermostatic-valve | 1× | 1 | · | part |
| 11.4.4 | Oil Hose | screw-compressor-oil-hose | 4× | 4 | · | part |
| 11.4.5 | Compressor Oil | screw-compressor-compressor-oil | 1× | 1 | · | part |
| 11.5 | Cooler & Fan 4 parts | screw-compressor-air-cooling | 1× | 1 | 7 | assembly |
| 11.5.1 | Air Aftercooler | screw-compressor-aftercooler | 1× | 1 | · | part |
| 11.5.2 | Oil Cooler | screw-compressor-oil-cooler | 1× | 1 | · | part |
| 11.5.3 | Cooling Fan 3 parts + deeper › | screw-compressor-cooling-fan | 1× | 1 | 4 | assembly |
| 11.5.4 | Moisture Separator | screw-compressor-moisture-separator | 1× | 1 | · | part |
| 11.6 | Inlet / Unloader Valve 3 parts | screw-compressor-inlet-valve | 1× | 1 | 3 | assembly |
| 11.6.1 | Air Intake Filter | screw-compressor-air-filter | 1× | 1 | · | part |
| 11.6.2 | Valve Piston | screw-compressor-valve-piston | 1× | 1 | · | part |
| 11.6.3 | O-Ring Set | oring-set | 1× | 1 | · | part |
| 11.7 | Minimum Pressure / Check Valve 2 parts | screw-compressor-mpv | 1× | 1 | 2 | assembly |
| 11.7.1 | Check Poppet & Spring | screw-compressor-mpv-poppet | 1× | 1 | · | part |
| 11.7.2 | O-Ring Set | oring-set | 1× | 1 | · | part |
| 11.8 | Controller 7 parts | screw-compressor-controller | 1× | 1 | 11 | assembly |
| 11.8.1 | Bare PCB | pcb-bare | 1× | 1 | · | part |
| 11.8.2 | Microcontroller | mcu | 1× | 1 | · | part |
| 11.8.3 | LCD Panel | lcd-panel | 1× | 1 | · | part |
| 11.8.4 | Touch Digitizer | touch-digitizer | 1× | 1 | · | part |
| 11.8.5 | Relay | relay | 4× | 4 | · | part |
| 11.8.6 | Pressure Transducer | screw-compressor-pressure-transducer | 1× | 1 | · | part |
| 11.8.7 | Temperature Sensor | screw-compressor-temp-sensor | 2× | 2 | · | part |
| 11.9 | Acoustic Enclosure 3 parts | screw-compressor-enclosure | 1× | 1 | 7 | assembly |
| 11.9.1 | Canopy Panel | screw-compressor-canopy-panel | 5× | 5 | · | part |
| 11.9.2 | Base Frame / Skid | screw-compressor-base-frame | 1× | 1 | · | part |
| 11.9.3 | Fastener Set | fastener-set | 1× | 1 | · | part |
| 12 | Refuge Chamber | main-beam-tbm-refuge-chamber | 1× | 1 | · | part |
| 13 | Workshop and Spares Store | main-beam-tbm-workshop | 1× | 1 | · | part |
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Where the backup system and tunnel services is used
1 product across 1 domain contain it, directly or inside a sub-assemblyUsed in 1 assembly
Sourcing: possible vendors
Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $0.50–$100. How estimates work| Vendor | HQ | Specialty | MOQ | Lead time |
|---|---|---|---|---|
|
🇨🇳Foxconn
foxconn.com ↗
|
Shenzhen, CN | Electronics contract mfg | 1,000 pcs | 6–10 wks |
| flex.com ↗ | Singapore | Electronics contract mfg | 1,000 pcs | 6–10 wks |
| dixoninfo.com ↗ | Noida, IN | Electronics contract mfg | 1,000 pcs | 6–10 wks |
| bydelectronic.com ↗ | Shenzhen, CN | Electronics contract mfg | 1,000 pcs | 6–10 wks |
| venture.com.sg ↗ | Singapore | Electronics contract mfg | 1,000 pcs | 6–10 wks |