Bearing material for porous hydrostatic gas bearing and porous hydrostatic gas bearing using the same
AssigneeOiles Corporation
InventorsHirotsugu Tomita, Naofumi Kumagai
Life of this patent
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Abstract
A bearing material includes: a backing metal made of stainless steel; and a porous sintered metal layer integrated with at least one surface of the backing metal by means of a bonding layer, particles of an inorganic substance being contained in a dispersed manner at grain boundaries of the porous sintered metal layer, wherein the porous sintered metal layer containing the particles of the inorganic substance are composed of 4 to 10% by weight of tin, 10 to 40% by weight of nickel, not less than 0.1 and less than 0.5% by weight of phosphorus, and the balance consisting of copper.
Claims30
A bearing material for a porous hydrostatic gas bearing comprising:
- a backing metal made of stainless steel;
- and
- a porous sintered metal layer integrated with at least one surface of said backing metal by means of a bonding layer, particles of an inorganic substance being contained in a dispersed manner at grain boundaries of said porous sintered metal layer,
- the porous sintered metal layer which contains the particles of the inorganic substance being composed of 4 to 10% by weight of tin, 10 to 40% by weight of nickel, not less than 0.1 and less than 0.5% by weight of phosphorus, and the balance consisting of copper.
A bearing material for a porous hydrostatic gas radial bearing comprising:
- a backing metal made of stainless steel and having a cylindrical inner surface;
- a plurality of annular groove portions which are provided in the inner surface of said backing metal in such a manner as to be juxtaposed in an axial direction and to be open on an inner surface side;
- a dead-end hole portion for mutual communication provided inside said backing metal in such a manner as to extend in an axial direction of said backing metal from one annular end face of said backing metal toward another annular end face thereof, to allow the annular grooves to communicate with each other;
- and
- a hollow cylindrical porous sintered metal layer for covering openings of each of the annular groove portions on the inner surface side of said backing metal, and integrated with the cylindrical inner surface of said backing metal by means of a bonding layer.
Dependencies are inferred from the claim text.