Sliding bearing
AssigneeC.R.I.D. S.A. Compagnie de Recherches Industrielle et Developpements
InventorMichel Zosi
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AssigneeC.R.I.D. S.A. Compagnie de Recherches Industrielle et Developpements
InventorMichel Zosi
Estimating the term…
Air flows are produced in a sliding bearing between the bearing surfaces (L) sliding relative to one another of a movable body (1, 3) and a stationary body (2). Compressed air is expanded through nozzles (4) between the bearing surfaces (L) to atmospheric pressure. As a result of these air flows, the static pressure between the bearing surfaces (L) is reduced so that compressive forces acting between the moving and the stationary body are produced. The bearing surfaces (L) and air flows are so matched to one another that the movable body (1, 3) is in a force-free state of equilibrium on assuming a position in which the bearing surfaces (L) of the movable body (1, 3) are not in contact with the bearing surfaces (L) of the stationary body (2). In order to ensure a clearly defined equilibrium position, the clearance between the movable body (1, 3) and the stationary body (2) is chosen so that any possible change of the spacings between the bearing surfaces brings about an opposing change of the pressure ratios. Spacings of approximately 0.01 to 0.02 mm are suitable for air flows. So that the sliding bearing can absorb external forces, the bearing surfaces are enlarged for increasing the compressive forces. The sliding bearing is virtually free from friction and free from wear. It is suitable for the bearing or seating of machine parts moved in rotary or linear manner, such as for the seating of spindles in machine tools.
A method for establishing a sliding bearing between a movable body (1, 3, 21) movable in a rotary or linear manner relative to a stationary body (2, 20), one of said bodies having a recess receiving a portion of the other body to provide at least two pairs of face-to-face bearing surfaces (L) which bearing surfaces slide relative to each other by means of a lubricant fluid, comprising the steps of:
A sliding bearing comprising a movable body (1, 3, 21) movable in a rotary or linear manner relative to a stationary body (2, 20), one of said bodies having a recess receiving a portion of the other body to provide at least two pairs of face-to-face bearing surfaces (L) which bearing surfaces are adapted to slide relative to each other by means of a lubricant fluid, at least one nozzle in one of said bearing surfaces defining a first of said pairs, at least one nozzle in another one of said bearing surfaces defining a second of said pairs, said nozzles being oriented normal to their bearing surface and being directed in opposite directions, a vent adjacent each nozzle, said face-to-face bearing surfaces defining cross-sectional clearance areas which are instantaneously constant between said nozzle and through said vent under equilibrium and loaded conditions of said bearing.
Dependencies are inferred from the claim text.