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Radial sliding-contact bearing for rotary rolls

  • US 5,279,497 A
  • Filed: 01/14/1993
  • Issued: 01/18/1994
  • Est. Priority Date: 05/17/1990
  • Status: Expired due to Fees
First Claim
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1. Radial sliding-contact bearing for rotary rolls, with a cylindric fixed inner portion (2), a sleeve (4) rotatable thereon, and a gap (6) intended for a fluid film arranged between the sleeve and the inner portion, said film in operation forming a rotational bearing for the sleeve, the fluid being delivered to the gap (6) through first and second longitudinal rows of nozzle openings (14,16) in the peripheral surface of the inner portion (2), said rows being arranged on each its side of a vertical diametrical plane (A) through the inner portion, characterized in thatthe two rows (14,16) of nozzle openings communicate with each other via a common fluid delivery channel (18) in the inner of the inner portion (2),the openings of the first row (14) are so located with respect to the vertical diametrical plane that, on the one hand, at start, fluid flowing out through these into the gap (6) lifts the sleeve (4) from the inner portion (2), and on the other hand, due to tangential forces appearing during start and in operation, said first openings (14) will be choked by the rotatable sleeve (4) resulting in a fluid increase at the openings of the second row,the openings (16) in the second row, which is located before the area of the horizontal radial plane (B) of the sleeve, have a fluid outlet direction (26) with a not unessential resultant in the rotational direction, so that fluid flowing out therefrom due to said fluid pressure increase counteracts tilting movement of the sleeve against the inner portion provoked by a force of reaction appearing due to said tangential force, andthe two opening rows (14,16) furthermore being so arranged with respect to each other that in operation the tangential force and its force of reaction are kept in a dynamic balance and thereby frictional forces between the sleeve (4) and the inner portion (2) are minimized.

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