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Oil pump gear and manufacturing method thereof

A manufacturing method and oil pump technology, applied to pump components, mechanical equipment, machines/engines, etc., can solve the problems of non-pressure resistance, many processes, and long production time, so as to improve hardness and pressure resistance and ensure normal operation , The effect of improving production efficiency

Inactive Publication Date: 2010-04-21
NINGBO YONGTAI POWDER METALLURGY
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, this manufacturing method requires more equipment, large investment, and high cost; at the same time, this manufacturing method has many processes and long production time
Another manufacturing method of gears is made by powder metallurgy, while the highest sintering temperature of existing powder metallurgy is 1115 degrees, and the density of manufactured gears is 6.4-6.8g / cm 3 , so that the hardness of the corresponding sintered gear is lower; in addition, the strength of this gear is lower and it is not pressure-resistant, which affects the speed of the oil pump rotor

Method used

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Embodiment Construction

[0027] The present invention will be described in further detail below in combination with specific embodiments.

[0028] The oil pump gear of this machine is composed of the following components in weight percentage:

[0029] Graphite 0.3%~0.6%

[0030] Copper 1.5%~2.5%

[0031] Nickel 1.5%~2.5%

[0032] Molybdenum 0.4%~0.7%

[0033] Lubricant 0.6%~0.9%

[0034] Cutting agent 0.3%~0.5%

[0035] The balance is iron.

[0036] Described lubricant is zinc stearate or paraffin oil, uses zinc stearate among the present embodiment. The cutting agent is manganese sulfide or calcium fluoride, and calcium fluoride is used in this embodiment. Both of the above are commercially available.

[0037] The manufacturing method of oil pump gear, it comprises the following steps:

[0038] 1) After the above-mentioned ingredient powder is prepared in proportion, pour it into a double-cone mixer for mixing and stirring, and mix the ingredients at normal temperature and pressure for 35 mi...

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Abstract

The invention discloses an oil pump gear comprising the following components in percentage by weight: 0.3%-0.6% of graphite, 1.5%-2.5% of copper, 1.5%-2.5% of nickel, 0.4%-0.7% of molybdenum, 0.6%-0.9% of lubricating agent, 0.3%-0.5% of cutting agent, and the balance of ferrum. A manufacturing method of the oil pump gear comprises the following steps: mixing materials; pressing; sintering; grinding; immersing into oil; and the like. By adopting the components and the manufacturing method, the rigidity and the pressure resistance of gear materials are greatly improved, machining process becomes simpler and the production efficiency is enhanced significantly and the cost is reduced.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to an oil pump gear for a light aircraft engine and a manufacturing method thereof. Background technique [0002] The engine oil pump of light aircraft generally uses externally meshed gears. When the engine is working, the camshaft drives the driving gear of the oil pump to rotate, and the gear swings the oil along the inner wall of the pump body from the oil inlet to the oil outlet. As a result, low pressure is formed in the pump to generate suction, and the oil in the oil tank will be sucked into the oil inlet. As the oil at the oil outlet of the oil pump accumulates more and more, the pressure at the oil outlet increases, so the oil is pressed to each friction part to realize forced lubrication. Therefore, the strength of the gear used is required to be high. Generally, the manufacturing method of gears generally adopts machining methods, that is, machining is carried out on gear for...

Claims

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Application Information

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IPC IPC(8): F04C15/00
Inventor 张雷增
Owner NINGBO YONGTAI POWDER METALLURGY
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