23-5 Fixed Pulley
Fixed support pulley transferring compensation rope tension in tunnel anchoring systems.
Specifications
| Model | 23-5 |
|---|---|
| Standard | TB/T 2075.23-2024, Fittings for overhead contact system of electrification railway — Part 23: Tunnel anchoring compensation devices |
The 23-5 fixed pulley provides the stationary rope support points of a tunnel anchoring compensation system: the compensation rope passes over the fixed wheel to transfer tension and change direction between the anchor arm and the compensation device.
Manufactured to TB/T 2075.23-2024, Fittings for overhead contact system of electrification railway — Part 23: Tunnel anchoring compensation devices, the wheel body and groove are dimensioned for the compensation rope, with an anti-derailment feature at the groove base. The axle fit turns freely for smooth transmission, and the rotating parts are maintenance-free.
Mounting uses U-bolts onto channel-steel brackets, giving a secure fixed installation in the tunnel environment. The pulley works with the 23-4 guide pulley, 23-1 heavy-duty anchor arm and 23-6 limit frame as a complete TB/T 2075.23 tensioning set.
Henan Chuangwit Railway Equipment Co., Ltd. supplies the 23-5 certified under CRCC, with groove dimensions matched across the whole rope-and-pulley set.
Frequently Asked Questions
What is the difference between a fixed pulley and a guide pulley?
The fixed pulley provides a stationary support point that transfers rope tension and changes its direction; the guide pulley primarily leads the rope along a path. In tunnel tensioning sets both work together.
How is the fixed pulley mounted?
Via U-bolts onto channel-steel brackets or matching supports at the tunnel anchorage.
What prevents the rope leaving the groove?
The groove profile matches the compensation rope and includes an anti-derailment lip at the groove base.
