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A crescent block assembly for internal gear pump and its preparation method

A technology of internal gear pumps and block components, which is applied in pumps, mechanical equipment, rotary piston pumps, etc., can solve problems such as crescent block friction damage, achieve the effects of reducing cutting processing, reducing production costs, and improving material utilization.

Active Publication Date: 2016-04-13
NINGBO HOYEA MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the long-term friction between the crescent block and the gear makes the crescent block very easy to be damaged by friction

Method used

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  • A crescent block assembly for internal gear pump and its preparation method
  • A crescent block assembly for internal gear pump and its preparation method
  • A crescent block assembly for internal gear pump and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The raw materials are weighed according to the weight percentage of each component of the crescent block as described below; after component analysis, they are put into a heating furnace to be smelted into molten metal at 1080°C. Wherein, the described crescent block assembly, that is, the large crescent block and the small crescent block are composed of the following components by weight percentage: copper (Cu): 62%, lead (Pb): 0.8%, manganese (Mn): 2.8% , silicon (Si): 1.2%, nickel (Ni): 0.2%, iron (Fe): 0.4%, and the balance is zinc (Zn).

[0038] After the above smelted molten metal is analyzed for composition, it is poured into a mold at a temperature of 1030° C., and then formed into a manganese brass metal material in the mold. The molding temperature in the mold is 300°C, and the mold opening time is 200s.

[0039] According to the shape and specification of the large crescent block and the small crescent block, the above-mentioned manganese brass metal materia...

Embodiment 2

[0042] The raw materials are weighed according to the weight percentages of the components of the crescent block as described below; after component analysis, they are put into a heating furnace and smelted into molten metal at 1070°C. Wherein, the described crescent block assembly, that is, the large crescent block and the small crescent block are composed of the following components by weight percentage: copper (Cu): 63%, lead (Pb): 0.5%, manganese (Mn): 3.0% , silicon (Si): 0.8%, nickel (Ni): 0.2%, iron (Fe): 0.3%, and the balance is zinc (Zn).

[0043] After the above smelted molten metal is subjected to component analysis, it is poured into a mold at a temperature of 1020° C., and then formed into a manganese brass metal material in the mold. The molding temperature in the mold is 310°C, and the mold opening time is 210s.

[0044] According to the shape and specification of the large crescent block and the small crescent block, the above-mentioned manganese brass metal m...

Embodiment 3

[0047] The raw materials are weighed according to the weight percentage of each component of the crescent block as described below; after component analysis, they are put into a heating furnace to be smelted into molten metal at 1050°C. Wherein, the described crescent block assembly, that is, the large crescent block and the small crescent block are composed of the following components by weight percentage: copper (Cu): 60%, lead (Pb): 1.0%, manganese (Mn): 2.5% , silicon (Si): 1.5%, nickel (Ni): 0.3%, iron (Fe): 0.35%, and the balance is zinc (Zn).

[0048] After the composition analysis of the molten metal after smelting, it is poured into a mold at a temperature of 1000° C., and then formed into a manganese brass metal material in the mold. The molding temperature in the mold is 280°C, and the mold opening time is 180s.

[0049] According to the shape and specification of the large crescent block and the small crescent block, the above-mentioned manganese brass metal mater...

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PUM

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Abstract

The invention relates to a crescent block assembly of a gear-within-gear pump and a preparation method thereof, and belongs to the technical field of alloy materials. The crescent block assembly is divided into a large crescent block and a small crescent block, wherein the inner cylindrical surface of the large crescent block is in contact with the outer circle surface of a gear shaft of the gear-within-gear pump; the outer cylindrical surface of the small crescent block is in contact with the inner cylindrical surface of the gear shaft of the gear-within-gear pump; a positioning pin is arranged between contact surfaces of the large crescent block and the small crescent block. The large crescent block and the small crescent block are prepared from the following components by weight percent: 60% to 63% of copper, 0.5% to 1.0% of lead, 2.5% to 3.0% of manganese, 0.8% to 1.5% of silicon, less than or equal to 0.3% of nickel, less than or equal to 0.5% of iron and the balance being zinc. The invention further provides the preparation method of the crescent block assembly. The crescent block assembly is high in hardness, precision and toughness, and long in service life. The preparation method is simple, high in labor productivity and material utilization rate and low in production cost.

Description

technical field [0001] The invention relates to a crescent block assembly for an internal gear pump and a preparation method thereof, belonging to the technical field of alloy materials. Background technique [0002] Gear pumps are widely used in hydraulic systems and can be divided into external gear pumps and internal gear pumps. Internal gear pumps are often used to transport Newtonian or non-Newtonian liquids in petroleum, chemical, paint, dye, food, oil, pharmaceutical and other industries. The types of liquids to be transported can range from light and volatile liquids to heavy and viscous , even semi-solid liquids. The internal meshing gear pump adopts the principle of internal meshing of gears, the pitch circle of the inner and outer gears is close to one side, and the crescent block is separated on the other side. The driving gear on the inner gear shaft drives the inner gear to rotate in the same direction. At the inlet, the gears are separated from each other to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C2/10F04C2/08F04C2/00C22C9/04B23P15/00
Inventor 张策虞拯翁之旦陈飞飞
Owner NINGBO HOYEA MACHINERY MFG