DAMPER FOR DAMPING VIBRATIONS WITH A DAMPING BODY PROMOTING FORMATION OF FOAM

• US 20100096228A1
• Filed: 09/05/2007
• Published: 04/22/2010
• Est. Priority Date: 02/27/2007
• Status: Active Grant

• Current Assignee: Teeness ASA (Sandvik AB)
• Original Assignee: Teeness ASA (Sandvik AB)
• Inventors: Olsen, Roger, Nordmark, Arne Martin, Digernes, Anders
• Granted Patent: US 8,820,496 B2
• Time in Patent Office: Days
• US Class Current: 188/269
• CPC Class Codes: B23B 27/002 with vibration damping means
• CPC Class Codes: B23C 5/003 with vibration suppressing means
• CPC Class Codes: F16F 15/173 provided within a closed housing F16F15/36 takes precedence
• CPC Class Codes: F16F 2222/126 using gases
• CPC Class Codes: F16F 7/1034 of movement of a liquid
• CPC Class Codes: F16F 7/112 on fluid springs
• CPC Class Codes: F16F 9/006 characterised by the nature of the damping medium, e.g. biodegradable variable viscosity damping adjustment F16F9/53
• CPC Class Codes: F16F 9/06 using both gas and liquid F16F9/486 take precedence; self-pumping fluid springs B60G17/044
• CPC Class Codes: Y10T 408/76 Tool-carrier with vibration-damping means
• CPC Class Codes: Y10T 409/304312 with means to dampen vibration

Abstract

The present invention concerns a damper for damping vibrations. The damper includes at least one substantially longitudinal damping body (1) with two end surfaces (21, 22) and one substantially longitudinal surface (20) between these. The damping body (1) includes a longitudinal direction (a) and a transversal direction (t) and is places in a substantially longitudinal cavity (15) with a damping fluid, wherein the cavity (15) defines at least one cavity surface (14) and the damping body (1) defines at least one damping surface. The damping fluid includes a proportion of liquid and a proportion of gas and either the cavity surface (14) or the damping body surface or both are broken to promote formation of foam in the damping fluid in operation.

Claims

1. A damper for damping vibrations, with at least one substantially longitudinal damping body with to end surfaces and a substantially longitudinal surface between these, said damping body including a longitudinal direction (a) and a transversal direction (t) and is placed in a substantially longitudinal cavity with a damping fluid, said cavity defining at least one cavity surface and the damping body defines at least one damping body surface,

characterized in that the damping fluid includes a proportion of liquid and a proportion of gas and at least one of the cavity surface or the damping body surface is broken to influence formation of foam in the damping fluid when in operation.

2. The damper according to claim 1, wherein the end surfaces of the damping body 1 is broken by at least one axial hole.

3. The damper according to claim 1, wherein the substantially longitudinal surface of the damping body is broken by at least one transversal hole.

4. The damper according to claim 1, wherein the substantially longitudinal surface of the damping body is broken by at least one transversal hole and the end surface of the damping body is broken by at least one axial hole.

5. The damper according to claim 2, wherein at least one of the holes are through-going.

6. The damper according to claim 1, wherein the external surface of the damping body and/or the surface of the cavity is broken by at least one longitudinal groove.

7. The clamper according to claim 1, wherein the external surfaces of the damping body and/or the surface of the cavity is broken by at least transversal groove.

8. The damper according to claim 1, wherein the outer surface of the damping body and/or the surface of the cavity is broken by at least one transversal groove and at least one longitudinal groove.

9. The damper according to claim 1, wherein the external surface of the damping body and/or the surface of the cavity is broken by at least one diagonal groove.

10. The damper according to claim 1, wherein the external surface of the damping body and/or the surface of the cavity is broken by a screw threaded surface.

11. The damper according to claim 1, wherein the damping body is substantially cylindrical and the substantially longitudinal cavity is cylindrical.

12. The damper according to claim 1, wherein the damping body includes any combination of the previously mentioned geometries.

13. The damper according to claim 1, wherein the damping fluid comprises between 30% and 90% liquid, preferably about 75% liquid and the remainder of gas in the cavity.

14. The damper according to claim 1, wherein the damping fluid comprises air and oil.