Machine and method for stabilising a ballast track

Patent metadata

Field	Value
Publication number	US-12559889-B2
Application number	US-202017779346-A
Country	US
Kind code	B2
Filing date	Nov 13, 2020
Priority date	Dec 10, 2019
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

The invention relates to a machine for stabilising a track with a ballast bed, comprising a machine frame supported on rail-based running gears and a stabilising unit which can be rolled on rails of the track by means of work unit rollers, and which comprises a vibration exciter for generating a dynamic impact force as well as a loading device for generating a load acting on the track. Therein, the loading device is coupled with a control device for periodically changing the load during a stabilising process. The periodic change of the load alternately influences the near and far range of the load application. This leads to improved compaction effectiveness compared to a constant load.

First claim

The invention claimed is:

1 . A machine for stabilizing a track with ballast bed, comprising:
a machine frame supported on rail-based undercarriages and a stabilizing unit which can be rolled on rails of the track by means of work unit rollers, and which comprises a vibration exciter for generating a dynamic impact force; and a loading device for generating a load acting on the track, wherein the loading device is coupled with a control device for periodically changing the load during a stabilizing process; wherein two stabilizing units arranged one behind the other, each stabilizing unit with its own loading device, are operated together; wherein an interval, adjusted to a driving speed of the machine, is predefined for the periodically changed load.

2 . The machine according to claim 1 , wherein sensors are arranged for recording a progression of a force acting on the track from the stabilizing unit, in that measuring signals from the sensors are transmitted to an evaluation device and in that the evaluation device is set up to determine a characteristic value derived from the progression of the force.

3 . The machine according to claim 1 , wherein for controlling a process parameter, a control loop is set up comprising a controller, a setting device for the loading device, and a measuring device for recording a process parameter.

4 . The machine according to claim 1 , wherein a further stabilizing unit is arranged, with a further loading device which is coupled with the control device for generating a periodically changed load.

5 . The method according to claim 1 , wherein a progression of a force acting on the track from the stabilising unit is recorded by means of sensors and in that measuring signals from the sensors are evaluated by means of an evaluation device to determine a characteristic value derived from the progression of the force.

6 . The method according to claim 1 , wherein the two loading devices are operated synchronously or asynchronously so that both stabilizing units exert the same load on the track in synchronous operation and different loads in asynchronous operation.

7 . A machine for stabilising a track with ballast bed, comprising:
a machine frame supported on rail-based undercarriages and a stabilizing unit which can be rolled on rails of the track by means of work unit rollers, and which comprises a vibration exciter for generating a dynamic impact force; and a loading device for generating a load acting on the track, wherein the loading device is coupled with a control device for periodically changing the load during a stabilizing process wherein the track is set into vibration by means of the stabilizing unit, wherein during the stabilizing process a periodically changed load is exerted on the track by means of the loading device; wherein two stabilizing units arranged one behind the other, each with its own loading device, are operated together;
wherein an interval, adjusted to a driving speed of the machine, is predefined for the periodically changed load.

Assignees

• Plasser & Theurer Export Von Bahnbaumaschinen Gmbh

Inventors

• Antony Bernhard
• Auer Florian
• Kopf Fritz

Classifications

• E01B27/16

  Sleeper-tamping machines · CPC title

• E01B27/20 Primary

  Compacting the material of the track-carrying ballastway, e.g. by vibrating the track, by surface vibrators (of trackless ballastway E01B27/02; for packing sleepers E01B27/12) · CPC title