THE MANUFACTURING METHOD OF THE JOURNAL THRUST BEARING USING A POROUS CERAMIC, AND THE JOURNAL THRUST BEARING

摘要

PURPOSE: A manufacturing method of the journal thrust bearing using a porous ceramic and the journal thrust bearing manufactured by the same are provided to manufacture a journal thrust bearing by joining a cylindrical ceramic to a housing after manufacturing the cylindrical ceramic by forming and sintering a mixture consisting of alumina, silica, ferric oxide, manganese oxide, and cobalt oxide. CONSTITUTION: A manufacturing method of the journal thrust bearing using a porous ceramic is as follows. 75 to 90 weight% of alumina, 5 to 15 weight% of silica, 2 weight% of a ferric oxide, 1 weight% of manganese oxide, and 0.50 weight% of cobalt oxide are mixed and ground after measuring. 1 weight% of a ceramics dispersing agent and 1.5 weight% of an organic binder with respect to a whole weight of a mixture are added and ground until a particle diameter of the alumina becomes 3 to 4um by wet-blinding-milling in a ball mill in which a ball of alumina is charged(S1). The granulated mixture is charged to a mold of a rubber type in which a core of a metal is inserted into a central part and formed at a hydrostatic pressure of 1000kg/cm^2 under water after granulating the mixed and ground mixture to have a diameter of 50um to 100um through a spray drier(S2). An external diameter is ground after getting a cylindrical ceramic(1) at 8 to 9 % of the porosity through sintering the formed body of cylindrical shape by putting into an electric furnace(S3). An inner diameter and front surface of the cylindrical ceramic are ground and cleaned after joining to an aluminum housing of the cylindrical type in which an air supply hole is formed by using epoxy(S4).