Geared pump for conveying fluids
AssigneesGeraete und Pumpenbau GmbH, Sgl Carbon SE
InventorsEugen Schmidt, Herbert Schmidt, Walter Thiele
Life of this patent
Estimating the term…
Abstract
An internally or externally geared pump for conveying fluids lacking or only having insufficient lubricating ability, includes gearwheels moving in an operating chamber of the pump, conveying fluids and being mounted completely in parts formed of a carbon material. Supports are formed from accurately worked lateral walls and a jacket of the operating chamber formed of the carbon material. The jacket surrounds the gearwheels in the radial direction and is likewise constructed as a support. Chambers on the suction side and on the pressure side for fluid supply and fluid removal, which are necessary for the operation of the pump, are molded into side walls of the operating chamber which is formed of carbon.
Claims20
A geared pump for conveying fluids lacking or having insufficient lubricating ability, the pump comprising:
- at least one connection for suction of fluids and at least one connection for expulsion of the fluids;
- ducts and interstices joining the connection for the suction of the fluids and the connection for the expulsion of the fluids;
- and
- a fluid conveying device disposed in one of said interstices and including an operating chamber having suction and expulsion sides, two gearwheels rotating in said operating chamber and mutually meshing for generating conveying spaces and reducing the conveying spaces again to a minimum value, and a housing of said operating chamber surrounding said gearwheels;
- at least one of said ducts for the suction of the fluids opening into said suction side of said operating chamber, and at least one of said ducts for the expulsion of the fluids opening from said pressure side of said operating chamber;
- said mutually meshing gearwheels formed of a material from the group consisting of nonferrous metal, steel, special steel, industrial ceramics, metals and metal alloys produced by powder metallurgy, thermosetting and thermoplastic synthetic materials, thermosetting and thermoplastic synthetic materials containing fillers and synthetically produced carbon;
- and
- said housing of said operating chamber formed of a synthetically produced material with a matrix formed of a carbonized, non-graphitized carbon and a filler bonded into the matrix, said filler formed of 35 to 97% by weight graphite, 0 to 62% by weight non-graphitized petroleum pitch coke or coal-tar pitch coke and 3 to 20% by weight mineral constituents.
Dependencies are inferred from the claim text.