ABRASION RESISTING MATERIAL

• Main Authors: YASUI TOYOAKI, YAMAMOTO KEIICHI
• Format: Patent
• Language: English
• Published: 03.04.1987
• Subjects: BEARINGS; BLASTING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; METALLURGY; NON-POSITIVE DISPLACEMENT PUMPS; ORGANIC MACROMOLECULAR COMPOUNDS; PIPES; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THEIR PREPARATION OR CHEMICAL WORKING-UP; THERMAL INSULATION IN GENERAL; WEAPONS

PURPOSE:To increase abrasion resistance and elongate the life of a dredging pump by including a matrix formed of an abrasion resisting rubber or polyurethane, high specific gravity powders dispersed in the matrix and uniformly dispersed ceramic particles. CONSTITUTION:A matrix 1 is composed of an abrasion resisting rubber which is formed of polyurethane or natural rubber vulcanized in the open steam process. The matrix 1 is uniformly mixed with metal carbide 2 such as WC, NbC and Mo C, and fine spherical or fine polygonal ceramics 3 of Al2O3, ZrB2, SiC, ZrO2, Bi3N4. Thus, as ceramics are uniformly dispersed, abrasion resistance is as so remarkably improved as to provide a material for an impeller, casing liner and suction and discharge pipe liner which can elongate the life of the dredging pump.