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 |
| Installation | On tunnel anchor bracket channel steel, fixed with U-bolts |
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.
Performance
Operating Conditions
Service in railway tunnels and confined anchoring points, with limited space for counterweight travel and reduced maintenance access.
Mechanical Performance
Fixed rope support with anti-derailment groove holds the compensation rope line in tunnel anchoring systems; U-bolt mounting suits channel-steel brackets.
Applications
Tunnel Anchor Brackets
U-bolt mounting on channel steel.
Fixed Rope Points
Holds the rope line at fixed points.
Anti-Derailment
Groove keeps the rope seated.
23-Series Sets
Specify with 23-4 guide pulleys.
