Cross Shaft Type Half Shaft Assembly Tunnel Boring Machine Half Drive Shaft

Product Specification

1. Product description

The wheel-side half shaft assembly of the tunnel boring machine is the core transmission component of the tunnel construction equipment, specially designed for driving the traveling system of the tunnel boring machine, and is responsible for efficiently transmitting power from the driving end to the traveling wheel set. Its structure is compact and it has excellent load-bearing capacity. It can adapt to the continuous high-load operation under complex geological conditions in the tunnel (such as fractured rock strata, high humidity and mud environment), ensuring the dynamic stability and precise control of the tunnel boring machine during the tunneling, turning and deviation correction processes. It is a key component for ensuring the efficient advancement of tunnel construction.

2. Product features

1) Super load-bearing structure

It is integrally forged from high-strength alloy steel, and undergoes quenching and tempering as well as surface strengthening treatment. The tensile strength reaches over 1,200 MPa, which is wear-resistant and corrosion-resistant, and can withstand a dynamic torque of ≥30,000 N·m.

2) Compact universal drive design

The cross-axis quasi-constant velocity universal joint structure supports a deflection Angle of ±45°, which is suitable for the steering of the walking wheel set and the adjustment of the fuselage posture in the narrow space of the tunnel, ensuring the continuity of power transmission.

3) Fully enclosed protection system

The multi-layer labyrinth seal and high-pressure rubber dust cover combination, with a protection level of IP68/IP69K, effectively prevent the intrusion of rock powder, mud and groundwater. The internal long-lasting high-temperature resistant grease (applicable temperature -45° C to 120° C) ensures a long maintenance cycle.

4) Anti-fatigue optimization

The lightweight design of the shaft, combined with finite element topology optimization and surface strengthening treatment, ensures uniform stress distribution and increases fatigue life by 30%.

3.Product parameters

T: Rated Torque
T1: Failure Torque
αmax: Maximum Allowable Swing Angle
SΦD: Rotation Space
Φd: Outer Sleeve Diameter
L: Yoke back Distance

4. Product application

1. Urban subway tunnels: Suitable for high-frequency deviation correction and stable advancement in soft soil and gravel strata.

2. Water conservancy and hydropower tunnels: Withstand high water pressure and mud and sand erosion environments, ensuring the reliability of long-distance tunneling.

3. Mine roadways: Impact-resistant design to cope with extreme geological conditions such as rockbursts and faults.

4. Undersea tunnel: After special surface treatment, it can resist seawater corrosion and meet the requirements of high-pressure sealing.

5.Customization: OEM customization is supported.

6. Product advantages:

1) Zero failure rate guarantee: The redundant bearing support structure can maintain short-term emergency operation even in case of a single point failure.

2) Quick disassembly and assembly design: Modular flange connection, which can be replaced within 1 hour.

3) Environmental adaptability: Acid and alkali resistant coating can be optionally equipped

4) Energy-saving and highly efficient: Transmission efficiency ≥98%, reducing energy loss and facilitating green construction.