Bearing of motor driven fuel pump

A bearing of a motor driven fuel pump which comprises a Cu-Ni based sintered alloy having a chemical composition that Ni: 21 to 35 %, Sn: 5 to 12 %, C: 3 to 7 %, P: 0.1 to 0.8 % and the balance: Cu and inevitable impurities, wherein pores are formed in the matrix thereof with a porosity of 8 to 18 %...

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Bibliographic Details
Main Authors NARISAKO HIDEKI, SHIMIZU TERUO, HAZAMA TADASHI, MARUYAMA TSUNEO
Format Patent
LanguageChinese
English
Published 02.01.2008
Subjects
ALLOYS
BEARINGS
BLASTING
CASTING
CHEMISTRY
ELEMENTS OR CRANKSHAFT MECHANISMS
ENGINEERING ELEMENTS AND UNITS
FERROUS OR NON-FERROUS ALLOYS
FLEXIBLE SHAFTS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
MECHANICAL ENGINEERING
METALLURGY
PERFORMING OPERATIONS
POWDER METALLURGY
ROTARY BODIES OTHER THAN GEARING ELEMENTS
SHAFTS
THERMAL INSULATION IN GENERAL
TRANSPORTING
TREATMENT OF ALLOYS OR NON-FERROUS METALS
WEAPONS
WORKING METALLIC POWDER
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Summary:A bearing of a motor driven fuel pump which comprises a Cu-Ni based sintered alloy having a chemical composition that Ni: 21 to 35 %, Sn: 5 to 12 %, C: 3 to 7 %, P: 0.1 to 0.8 % and the balance: Cu and inevitable impurities, wherein pores are formed in the matrix thereof with a porosity of 8 to 18 %, wherein the p component is mainly contained in the grain boundary portion, wherein free graphite is distributed along the inner surface of open pores which open to the surface of the bearing and extend into the inside of the bearing, and wherein an Sn high concentration alloy layer having an Sn content of 50 mass % or higher is formed in the inner surface of the above open pores and around openings of the above open pores.
Bibliography:Application Number: CN200680001846