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Bearing made from copper sintered alloy and motor type fuel pump

A sintered alloy, copper-based technology, applied in the direction of bearings, bearings, shafts and bearings in rotating motion, can solve problems such as wear, lack of strength and wear resistance

Inactive Publication Date: 2005-08-17
DIAMET CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the bearings made of copper-based sintered alloys used in conventional motor fuel pumps do not have sufficient strength and wear resistance, so they wear out quickly

Method used

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  • Bearing made from copper sintered alloy and motor type fuel pump
  • Bearing made from copper sintered alloy and motor type fuel pump

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment

[0016] The bearing made of copper-based sintered alloy related to the first technical solution of the present invention is made of copper-based sintered alloy with such composition, that is, 10wt%-25wt% Ni, 10wt%-25wt% Zn, 0.1wt% -0.9wt% P, 0.5wt%-5wt% molybdenum disulfide and the remainder copper and unavoidable impurities. In addition, the structure of the copper-based sintered alloy is that copper-phosphorus compound and molybdenum disulfide are dispersed in a matrix composed of Cu-Ni-Zn alloy solid solution phase, and the porosity is 5%-25%.

[0017] The reason why the composition and porosity of the copper-based sintered alloy constituting the bearing are limited as described above in the bearing of this example will be described.

[0018] (1) Ingredients

[0019] (a) Ni and Zn

[0020] These components are solid-dissolved in copper together to form a matrix composed of a Cu-Ni-Zn alloy solid solution phase, which plays a role in improving the strength and corrosion res...

no. 2 Embodiment

[0031] In the first embodiment above, only the MoS 2 used as a lubricating component, and the bearing made of copper-based sintered alloy according to the second embodiment of the present invention is characterized in that, in addition to MoS 2 In addition, 5 wt% or less of carbon is contained as a lubricating component. That is, the bearing made of copper-based sintered alloy of the second embodiment is made of copper-based sintered alloy having a composition of 10wt%-25wt% of Ni, 10wt%-25wt% of Zn, 0.1wt%- 0.9wt% of P, 5wt% or less of C, 0.5wt%-5wt% of molybdenum disulfide and the rest are copper and unavoidable impurities. In addition, the structure of the copper-based sintered alloy is that copper-phosphorus compound, free graphite and molybdenum disulfide are dispersed in a matrix composed of a Cu-Ni-Zn alloy solid solution phase, and the porosity is 5%-25%. .

[0032] The reasons for limiting components other than carbon are the same as those in the first embodiment. ...

example

[0039] Below, enumerate the example of the present invention to confirm its effect.

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Abstract

A bearing is made of a copper-based sintered alloy consisting of 10-25% of nickel (Ni), 10-25% of zinc (Zn), 0.1-0.9% of phosphorous (P), 0-5% of carbon (C), 0.5-5% of molybdenum disulfide, and copper and inevitable impurities as the balance. The alloy has a texture from a Cu-P compound and molybdenum disulfide dispersed in copper, nickel, zinc alloy solid solution phase base material and a porosity within a range of 5-25%. An Independent claim is also included for motor fuel pump.

Description

field of invention [0001] The present invention relates to a bearing made of copper-based sintered alloy suitable for small-sized and high-speed motorized fuel pumps and the like, and the motorized fuel pump. Background technique [0002] Generally, a motor-type fuel pump is provided in an engine that uses liquid fuel such as gasoline or diesel as fuel. For example, as a motor fuel pump for gasoline engines, it is known to have figure 1 A fuel pump of the structure shown. [0003] This motor fuel pump has such a structure, that is, in the housing 1, the rotating shaft 2 fixedly arranged on the two ends of the motor 5 is supported on the bearings 3a, 3b, and the impeller 4 is inserted into one end of the rotating shaft 2 and along the motor. The outer peripheral surface of the (rotor) 5 and the gap (omitted in the figure) between the bearings 3a, 3b and the rotating shaft 2 form a narrow gasoline flow path. Various types of copper-based sintered alloys are used for the bea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C17/00C22C9/04C22C9/06C22C32/00F16C33/12
CPCC22C9/06F16C33/12C22C9/04F16C33/121C22C32/0089F16C33/104F16C33/128F16C2204/14Y10S384/907F16C17/00
Inventor 兼崎升丸山恒夫海老原嘉男
Owner DIAMET CORP