---
title: "Thrust System"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:THRUST_SYSTEM"
  data_integrity_hash: "389e4b8dd9759ed20dff778d8edeb9e4"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:THRUST_SYSTEM"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/thrust-system.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/thrust-system"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "150-350 bar"
    unit: "kN"
engineering_limits:
  max_safe_operating_point:
    value: 420
    unit: "bar"
    consequence: "Yield strength of AISI 4140 steel (415 MPa) exceeded at 420 bar pressure, leading to plastic deformation and loss of sealing integrity"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Contaminant particle &gt;15 μm in hydraulic fluid"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install 10 μm absolute filtration with differential pressure monitoring"
  - node_2:
      trigger: "Hydraulic fluid temperature sustained above 85°C"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integrate plate heat exchanger maintaining fluid at 45-65°C"
bom_nodes:
  thrust-cylinders:
    type: "part"
    urn: "URN:CNFX:ME:THRUST_CYLINDERS"
    interface_type: "physical-logic-coupled"
  hydraulic-power-unit:
    type: "part"
    urn: "URN:CNFX:ME:HYDRAULIC_POWER_UNIT"
    interface_type: "physical-logic-coupled"
  control-valves:
    type: "part"
    urn: "URN:CNFX:ME:CONTROL_VALVES"
    interface_type: "physical-logic-coupled"
  pressure-sensors:
    type: "part"
    urn: "URN:CNFX:ME:PRESSURE_SENSORS"
    interface_type: "physical-logic-coupled"
  cylinder-mounting-frame:
    type: "component"
    urn: "URN:CNFX:ME:CYLINDER_MOUNTING_FRAME"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 1940-1:2003 (BALANCE QUALITY REQUIREMENTS FOR ROTORS)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI/ASME B46.1-2009 (SURFACE TEXTURE)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/thrust-system.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "2c994e839088d814d69fb0f886d290d87d2d52b5b4126a843ab3d6c9454a36bc"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Thrust System

## 1. Technical Definition
Hydraulic system that provides forward force to advance the tunnel boring machine through soil and rock

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **150-350 bar**. Failure boundary: **Hydraulic pressure exceeding 420 bar causes permanent deformation of cylinder walls**, Mechanism: **Yield strength of AISI 4140 steel (415 MPa) exceeded at 420 bar pressure, leading to plastic deformation and loss of sealing integrity**.

### 2.1 Analytical Physics Model
Governed by the **L10 Bearing Life & Fatigue Model**:

> **Primary Equation**: $L_{10} = (\frac{C}{P})^p$  
> **Engineering Impact**: Predicts mechanical lifecycle before component fatigue.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| C | Dynamic Load Rating | Engineering Constant |
| P | Equivalent Dynamic Load | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Contaminant particle &gt;15 μm in hydraulic fluid | 8 | Servo valve spool seizure | Install 10 μm absolute filtration with differential pressure monitoring |
| Hydraulic fluid temperature sustained above 85°C | 8 | Seal material degradation and leakage | Integrate plate heat exchanger maintaining fluid at 45-65°C |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | kN | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Thrust Cylinders](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/thrust-cylinders.md) `(Standalone System)`
- [Hydraulic Power Unit](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/hydraulic-power-unit.md) `(Standalone System)`
- [Control Valves](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/control-valves.md) `(Standalone System)`
- [Pressure Sensors](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/pressure-sensors.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Cutterhead System**, **Muck Removal System**  
**Downstream Applications**: Railway Tunnels, Subway Tunnels, Utility Tunnels  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What materials are used in the thrust system for durability?
**A**: Our thrust system uses high-strength alloy steel for structural components, chromium-plated piston rods for corrosion resistance and smooth operation, and specialized hydraulic seals designed to withstand high pressures and abrasive tunneling environments.

### Q: How does the thrust system integrate with tunnel boring machine operations?
**A**: The system connects to the TBM's hydraulic power unit and control system, with thrust cylinders mounted on a sturdy frame to provide controlled forward force. Pressure sensors monitor performance, while control valves regulate movement through various soil and rock conditions.

### Q: What maintenance is required for the hydraulic thrust system?
**A**: Regular inspection of hydraulic seals and piston rods is essential, along with monitoring pressure sensor readings. The system is designed for easy access to components like control valves and cylinder mounting points, with recommended service intervals based on operating hours and ground conditions.

## 6. Manufacturing Compliance
- ISO 1940-1:2003 (BALANCE QUALITY REQUIREMENTS FOR ROTORS)
- ANSI/ASME B46.1-2009 (SURFACE TEXTURE)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Thrust System](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/thrust-system)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **5** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: THRUST_SYSTEM | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: fa81091d
