Abrasion-resistant bearing of motor type fuel pump

A fuel pump, wear resistance technology, applied in the direction of bearings, shafts and bearings, bearing components, etc., can solve the problems of rapid wear, accelerated wear, and no wear resistance.
CN1777762AActive Publication Date: 2006-05-24DIAMET CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DIAMET CORP
Publication Date
2006-05-24

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Abstract

A wear-resistant bearing of a motor-type fuel pump, characterized in that it is composed of Cu-Ni based sintered alloy, and the sintered alloy has graphite: 1-5% and P content: 5-10% in mass % Cu-P alloy: 2 to 9%, Cu-Ni alloy containing 21 to 26% Ni: the remaining part is composed of a sintered body of a compacted powder body, and is formed on a Cu-Ni alloy matrix , the pores are dispersedly distributed at a ratio of porosity: 8 to 18%, and have a structure in which P component is distributed at the grain boundary between the Cu-Ni alloy grains and free graphite is distributed in the pores.
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Description

technical field

[0001] The present invention relates to a bearing which is made of a high-strength Cu-Ni sintered alloy which has excellent wear resistance and corrosion resistance, and is therefore particularly suitable for miniaturization and weight reduction of motor-type fuel pumps. And when applicable, it can exert excellent wear resistance for a long time. Background technique

[0002] Conventional engines that use liquid fuels such as gasoline or light oil as fuel generally have motor-type fuel pumps. For example, as motor-type fuel pumps for gasoline engines, there are such figure 2 The structure shown in the simplified cross-section diagram is familiar to everyone.

[0003] That is, as shown in the figure, the above-mentioned motor-type fuel pump operates as follows: in the casing, the rotating shaft fixedly arranged at both ends of the motor is supported by bearings, an impeller is inserted into one end of the rotating shaft, and It has a structure in which a gas...

Claims

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