# US 2019/0170213 A1 · Torsional Vibration Damper

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- Number: US 2019/0170213 A1
- Document ID: US20190170213A1
- Status: Published application
- Kind: A1
- Application number: 16/257,147
- Filed: 2019-01-25
- Published: 2019-06-06
- Earliest claimed: 2016-07-26
- Assignees: Hasse & Wrede GmbH
- Applicants: Hasse & Wrede GmbH
- Inventors: Michael STEIDL; Florian Knopf
- Web page: https://patentgrep.com/patent/US20190170213A1

## CPC

- F16F 15/167: having an inertia member, e.g. ring
- F16F 15/1442: {with a single mass}
- F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION

## Abstract

A torsional vibration damper has a hub part primary mass mountable on a motor drive shaft, and an interia ring secondary mass which at least partially encloses the hub part in the radially outer region. A gap between the hub part and the inertia ring is filled with fluid. A seal device between the hub part and the flywheel ring prevents escape of the fluid. The seal device has a first ring connected tightly to the hub part, a second ring connected tightly to the inertia ring, and an elastomer ring connected on one side sealingly to the first ring and on the other side to the second ring.

## Claims

### Claim 1

A torsional vibration damper, comprising:
a hub part configured to be attached a shaft;
an inertia ring which at least partially encloses a radially outer region of the hub part; and
a sealing device configured to prevent escape of a fluid provided in a fluid-filled gar between the hub part and the inertia ring, the sealing device including a first ring connected to the hub part, a second ring connected to the inertia ring, and an elastomer ring connected sealingly on a first side to the first ring and on a second side to the second ring.

### Claim 2 (depends on 1)

The torsional vibration damper as claimed in claim 1, wherein
the first and second rings are made of metal.

### Claim 3 (depends on 2)

The torsional vibration damper as claimed in claim 2, wherein
the elastomer ring is connected sealingly to the first and second rings by a rubber-metal connection.

### Claim 4 (depends on 3)

The torsional vibration damper as claimed in claim 3, wherein
the rubber-metal connection is a result of an elastomer cross-linking process.

### Claim 5 (depends on 1)

The torsional vibration damper as claimed in claim 1, wherein
the elastomer ring is a high-temperature-resistant elastomer.

### Claim 6 (depends on 5)

The torsional vibration damper as claimed in claim 5, wherein
the high-temperature material is a silicone-containing material.

### Claim 7 (depends on 2)

The torsional vibration damper as claimed in claim 2, wherein
the elastomer ring is a high-temperature-resistant elastomer.

### Claim 8 (depends on 1)

The torsional vibration damper as claimed in claim 1, wherein
the elastomer ring is connected sealingly to at least one or more regions of at least one of the first and second rings extending one or more of obliquely, axially, and radially relative to a rotation axis of the torsional vibration damper.

### Claim 9 (depends on 1)

The torsional vibration damper as claimed in claim 1, wherein
the first and second rings overlap in a radial direction relative to a rotation axis of the torsional vibration damper, and
the elastomer ring is arranged in a region between the overlapping portions of the first and second rings.

### Claim 10 (depends on 1)

The torsional vibration damper as claimed in claim 1, wherein
the first and second rings are arranged in a common plane, and
the elastomer ring is connected sealingly to mutually facing peripheral edges of the first and second rings.

### Claim 11 (depends on 1)

The torsional vibration damper as claimed in claim 1, wherein
the inertia ring is mounted on at least one plain bearing configured to maintain a predetermined the inertia ring apart from the hub part and one or both of a predetermined radial distance and a predetermined axial distance.