Sintered bearing and method for producing sintered bearing

A technology for sintered bearings and manufacturing methods, applied in the direction of bearings, bearing components, shafts and bearings, etc., can solve the problems of sintered bearings such as low water resistance/corrosion resistance, insufficient sliding properties, and unsuitability, so as to reduce frictional resistance and improve Lubricity, lubricating effect

Active Publication Date: 2020-08-25
PORITE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, sintered bearings have problems of low water resistance / corrosion resistance and are not suitable for use in liquids
In particular, when sintered bearings are used in water, there is a problem of insufficient sliding properties

Method used

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  • Sintered bearing and method for producing sintered bearing
  • Sintered bearing and method for producing sintered bearing
  • Sintered bearing and method for producing sintered bearing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 4

[0224] The raw material powder of the sintered bearing of Example 4 was produced from Cu-14Ni-14Zn-2Sn-0.03P alloy powder and graphite powder (solid lubricant).

[0225] On the other hand, the raw material powders of the sintered bearings of Comparative Examples 1 to 3 were produced from Cu-18Ni-18Zn alloy powder, Cu-11Sn alloy powder, Cu-8P alloy powder, and graphite powder (solid lubricant).

[0226] In addition, the raw material powder of the sintered bearing of Comparative Example 4 was produced from Cu-18Ni-18Zn alloy powder, Cu-8P alloy powder, and graphite powder (solid lubricant).

[0227] Specifically, as image 3 As shown, the raw material powder of the sintered bearing of Example 1 is calculated by stirring and mixing 97.5 mass % Cu-14Ni-14Zn-2Sn alloy powder and 2.5 mass % produced from graphite powder.

Embodiment 2

[0228] The raw material powder of the sintered bearing of Example 2 was obtained by stirring and mixing 96.5% by mass of Cu-14Ni-14Zn-2Sn alloy powder and 3.5% by mass of graphite powder in a mass ratio relative to the total mass of the raw material powder (sintered compact). And generated.

Embodiment 3

[0229] The raw material powder of the sintered bearing of Example 3 was obtained by stirring and mixing 99.4% by mass of Cu-14Ni-14Zn-2Sn alloy powder and 0.6% by mass of graphite powder in a mass ratio relative to the total mass of the raw material powder (sintered compact). And generated.

[0230] The raw material powder of the sintered bearing of Example 4 was obtained by stirring and mixing 97.5 mass % Cu-14Ni-14Zn-2Sn-0.03P alloy powder and 2.5 mass % produced from graphite powder.

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PUM

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Abstract

To improve the mechanical strength and vibration resistance of a sintered bearing and to prevent damage to the rotary shaft of the sintered bearing. A sintered bearing 20 according to the present invention is formed of a sintered body that uses nickel silver (Cu-Ni-Zn) as a base material. In this sintered bearing 20, P is not added into the sintered body, or alternatively, the P content in the sintered body is less than 0.05% by mass in terms of the mass ratio to the total mass. Consequently, crystal grains constituting the sintered body can be miniaturized. Specifically, the average crystal grain size of the crystal grains that constitute the sintered body in this sintered bearing 20 is 20 [Mu]m or less. Consequently, it is possible to improve the mechanical strength and vibration resistance, while preventing damage to the rotary shaft.

Description

technical field [0001] The present invention relates to a sintered bearing and a method for manufacturing the sintered bearing, and particularly relates to a sintered bearing suitable for use in a motor of a liquid pump, and a method for manufacturing the sintered bearing. Background technique [0002] Conventionally, various pumps are known as pumps for liquid transfer (hereinafter referred to as "liquid pumps"). [0003] For example, known fluid pumps mounted on automobiles include water pumps for circulating cooling water for engine cooling, washer fluid pumps for discharging windshield washer fluid, oil pumps for generating oil pressure in hydraulic mechanisms, and oil pumps for Oil pumps for pressure-feeding engine oil, fuel pumps for supplying fuel (gasoline, light oil, alcohol, etc.), etc. [0004] In recent years, in liquid pumps, from the viewpoint of stabilizing the discharge amount (pumped water amount), electrification in which power is obtained from an electric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04
CPCB22F3/10B22F3/24B22F3/26C22C9/04C22C9/06C22C1/0425F16C33/121F16C33/128F16C33/145F16C33/1095F16C2204/10F16C2204/14F16C2240/48B22F5/106H02K7/083B22F2998/10B22F2999/00H02K7/14F16C33/104F16C2204/52F16C2360/42B22F3/1103B22F1/00B22F1/105B22F2003/166B22F3/02B22F5/00F16C17/02F16C33/10F16C33/12F16C33/14H02K7/08B22F3/004B22F3/12B22F2301/10B22F2304/10
Inventor 田边重之麻生忍奈良太
Owner PORITE
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