Machine for stabilizing a track

Patent metadata

Field	Value
Publication number	US-11891761-B2
Application number	US-201916960131-A
Country	US
Kind code	B2
Filing date	Jan 14, 2019
Priority date	Feb 13, 2018
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

The invention relates to a machine for stabilizing a track, including a machine frame supported on on-track undercarriages and a vertically adjustable stabilizing unit designed to roll on rails of the track by means of unit rollers, the stabilizing unit comprising a vibration exciter with rotating imbalance masses for generating an impact force (FS) acting dynamically in a track plane perpendicularly to a track longitudinal direction and a vertical drive for generating a vertical load acting on the track. In this, it is provided that the vibration exciter comprises at least two imbalance masses which are driven applying a variably adjustable phase shift (Δφ1, Δφ2). The invention further relates to a method for operating such a machine.

First claim

The invention claimed is:

1. A machine for stabilizing a track, comprising:
a machine frame:
on-track undercarriages;
a vertically adjustable stabilizing unit having unit rollers wherein the machine frame is supported on said on-track undercarriages and said vertically adjustable stabilizing unit designed to roll on rails of the track by means of said unit rollers;
wherein the stabilizing unit comprises:
a vibration exciter with rotating imbalance masses for generating an impact force (F S ) acting dynamically in a track plane perpendicularly to a track longitudinal direction and
a vertical drive for generating a vertical load acting on the track, wherein the vibration exciter comprises:
at least two imbalance masses forming an imbalance pair comprising a left-turning imbalance mass and a right-turning imbalance mass and wherein at least one imbalance mass of said imbalance mass pair is driven applying a first phase shift (Δφ 1 ) which is variably adjustable with respect to an initial position which are driven applying a variably adjustable phase shift (Δφ 1 , Δφ 2 );
wherein the vibration exciter comprises at least four rotatable imbalance masses, of which two imbalance masses-in each case are driven right-turning and two imbalance masses are driven left-turning; and
wherein the two left-turning imbalance masses are driven with a variably adjustable second phase shift (Δφ 2 ) to one another, and wherein the two right-turning imbalance masses are driven with a variably adjustable second phase shift (Δφ 2 ) to one another.

2. The machine according to claim 1 , wherein an angle sensor is associated with each imbalance mass.

3. The machine according to claim 1 , wherein the respective imbalance mass is arranged on the stabilizing unit with a rotation axis being aligned in the track longitudinal direction.

4. The machine according to claim 1 , wherein a separate drive is associated with each imbalance mass.

5. The machine according to claim 4 , wherein the respective drive is designed as an electric drive.

6. The machine according to claim 5 , wherein the electric drives are controlled by means of a common control device.

7. The machine according to claim 4 , wherein the respective drive is designed as a hydraulic drive.

8. The machine according to claim 4 , wherein an adjustment device for a variable phase shift (Δφ 1 , Δφ 2 ) is associated with the respective drive.

9. The machine according to claim 1 , wherein a common drive is associated with two imbalance masses.

10. A method of operating a machine according to claim 1 , comprising the steps of:
setting the stabilizing unit down on the track via the vertical drive and actuated with a vertical load, and
driving said at least two rotatable imbalance masses by applying a variably adjustable second phase shift (Δφ 1 , Δφ 2 ) to one another;
wherein one imbalance mass in an imbalance pair is driven right-turning and one imbalance mass is driven left-turning, and wherein at least one of these imbalance masses is driven applying a first phase shift (Δφ 1 ) which is variably adjustable with respect to an initial position;
wherein in the case of four imbalance masses, two left-turning imbalance masses are driven applying a variably adjustable second phase shift (Δφ 2 ) to one another and two right-turning imbalance masses are driven applying a variably adjustable second phase shift (Δφ 2 ) to one another.

Assignees

• Plasser & Theurer Export Von Bahnbaumaschinen Gmbh

Inventors

• Wollanek Samuel
• Matzinger Nikolaus

Classifications

• 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

• E01B2203/127

  vibrating the track surface · CPC title

• B06B1/16

  operating with systems involving rotary unbalanced masses · CPC title

• B06B1/161

  Adjustable systems, i.e. where amplitude or direction of frequency of vibration can be varied · CPC title

• B06B1/18

  wherein the vibrator is actuated by pressure fluid (B06B1/20 takes precedence) · CPC title