Damper for damping vibrations with a damping body promoting formation of foam

• US 8,820,496 B2
• Filed: 09/05/2007
• Issued: 09/02/2014
• Est. Priority Date: 02/27/2007
• Status: Active Grant

• Current Assignee: Teeness ASA (Sandvik AB)
• Original Assignee: Teeness ASA (Sandvik AB)
• Inventors: Digernes, Anders, Nordmark, Arne Martin, Olsen, Roger
• Primary Examiner(s): Williams, Thomas J
• Assistant Examiner(s): SY, MARIANO ONG
• Application Number:
  US12/528,778
• Publication Number:
  US 20100096228A1
• Time in Patent Office: 2,554 Days
• Field of Search: 188/269, 188/378, 188/322.18, 267/137, 267/125, 408/143, 409/141, 409/234, 821/58, 821/59, 821/60, 829/04
• US Class Current: 188/378
• 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

A damper includes at least one substantially longitudinal damping body with two end surfaces and one substantially longitudinal surface between. The damping body is placed in a substantially longitudinal cavity, which includes a cavity surface, with a damping fluid that includes a liquid and a gas. At least one of the cavity surface, end surfaces or longitudinal surface is broken, and the damping body can pulsate in the cavity when the damper is in operation.

Claims

1. A method of damping vibrations in a machine tool, comprising:

placing a substantially longitudinal and cylindrical damping body in a cavity of the machine tool, the damping body having an axial hole that extends through the entire longitudinal length of the damping body, the cavity being filled with a damping fluid comprising liquid and gas;

rotating the machine tool such that the position of the damping body within the cavity is continuously altered;

mixing the liquid and gas using the continuously altered damping body to form foam in the cavity; and

damping vibrations in the machine tool using the damping body and foam.

2. The method of claim 1, further comprising forcing liquid out of the axial hole while forcing gas into the axial hole as the damping body pulsates within the cavity.

3. The method of claim 2, further comprising forcing gas into the axial hole from opposite ends of the damping body to ease the formation of gas pockets in the liquid.

4. The method of claim 3, wherein the gas comprises air and the liquid comprises oil.