Friction Buffer Stop
ProductOverview
A friction buffer stop is a track-end safety device designed to stop a runaway or over-speed train with minimal passenger discomfort. The friction buffer absorbs the train's kinetic energy by deforming resilient "shoes" sandwiched between the moving train and a fixed end plate. The shoes slide apart with very high friction, dissipating energy as heat, and hydraulic dampers meter the load rise.
How it works
The Base and Guide Frame is bolted to the track bed at the end of the siding or yard lead. The Sliding Rail Frame sits within the frame, with the contact plate at the front and two friction shoes sandwiched on either side.
When a train strikes the buffer head, the train's momentum drives the Sliding Platform backward against the friction and the hydraulic dampers. The Friction Shoe Assembly are compressed between the moving platform and the fixed guides.
The friction material generates a large resistive force proportional to the normal pressure. The hydraulic dampers meter the speed of platform retraction.
Bill of materials for Friction Buffer Stop
7 top-level lines as of r19355| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Base and Guide Frame 4 parts | buffer-stop-base-structure | 1× | 1 | 0 | assembly |
| 2 | Friction Shoe Assembly 3 parts | buffer-stop-friction-shoes | 2× | 2 | 0 | assembly |
| 3 | Buffer Head Contact Plate 2 parts | buffer-stop-buffer-head | 1× | 1 | 0 | assembly |
| 4 | Sliding Rail Frame 3 parts | buffer-stop-sliding-rail-assembly | 1× | 1 | 0 | assembly |
| 5 | Hydraulic Damper 2 parts | buffer-stop-shock-absorber | 2× | 2 | 0 | assembly |
| 6 | Fixed End Barrier 3 parts | buffer-stop-end-wall | 1× | 1 | 0 | assembly |
| 7 | Fastening & Anchoring Kit 1 parts | buffer-stop-fastener-assembly | 1× | 1 | 0 | assembly |
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