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Cast tin bronze for friction pair of aviation hydraulic pump and its melting method

A tin bronze and hydraulic pump technology, which is applied in the field of casting tin bronze for the friction pair of aviation hydraulic pumps and its smelting, can solve the problems of large expansion coefficient of tin bronze, poor bearing capacity of tin bronze, poor bearing capacity and wear resistance of tin bronze, etc.

Active Publication Date: 2020-10-27
AVIC LIYUAN HYDRAULIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, with the development of a new generation of aviation hydraulic pumps in the direction of high pressure, high speed, long life, and high reliability, the problems of insufficient bearing capacity of friction pairs of aviation hydraulic pumps and easy wear of materials have become prominent. Wear resistance puts forward higher requirements. The existing tin bronze has poor bearing capacity and wear resistance, which cannot meet the development needs of the new generation of aviation hydraulic pump friction pairs. Moreover, the existing tin bronze has a large expansion coefficient, and tin Bronze has a large amount of deformation when heated, and it cannot meet the development needs of the friction pair of the new generation of aviation hydraulic pumps.
Therefore, the existing tin bronze has the defects of poor bearing capacity, poor wear resistance and large expansion coefficient, which cannot meet the development needs of the new generation of aviation hydraulic pump friction pairs.

Method used

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  • Cast tin bronze for friction pair of aviation hydraulic pump and its melting method
  • Cast tin bronze for friction pair of aviation hydraulic pump and its melting method
  • Cast tin bronze for friction pair of aviation hydraulic pump and its melting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1. A cast tin bronze for the friction pair of an aviation hydraulic pump, comprising 9-11% tin, 6-8% nickel, 2-3.3% lead, 0.2-0.5% zinc, and 0.1% oxidized rare earth CeO 2 , 0.01 to 0.1% phosphorus, and the rest is copper.

[0027] The smelting method of casting tin bronze for the friction pair of aviation hydraulic pumps first prepares the raw materials for making tin bronze, including 6Kg of pure tin, 1.5Kg of pure lead, 24.77Kg of copper-nickel alloy (containing 4.8Kg of nickel, and the rest is copper), 0.3Kg of pure zinc, 0.06kg of rare earth oxide, 0.4kg of phosphorus copper (containing 0.06kg of phosphorus, the rest is copper), 26.97Kg of pure copper, and a total of 60Kg of raw materials. Then use 50 / 100 grain size quartz sand mixed with 5-8% rapeseed oil to make the sand riser and rain block, and heat the sand riser and rain block to 200-400°C and keep it warm for 1.5-2.5 h; Then clean the sand cover riser and rain block, repair the small head of the r...

Embodiment 2

[0035] Example 2. A cast tin bronze for the friction pair of an aviation hydraulic pump, comprising 9-11% tin, 6-8% nickel, 2-3.3% lead, 0.2-0.5% zinc, and 0.1% oxidized rare earth CeO 2 , 0.01 to 0.1% phosphorus, and the rest is copper.

[0036]The smelting method of casting tin bronze for the friction pair of aviation hydraulic pump, first prepare the raw materials for making tin bronze, including 5.4Kg of pure tin, 1.5Kg of pure lead, 22.12Kg of copper-nickel alloy (4.2Kg of nickel, the rest is copper) , 0.3Kg of pure zinc, 0.06kg of rare earth oxide, 0.4kg of phosphorus copper (containing 0.06kg of phosphorus, the rest is copper), 30.22Kg of pure copper, and a total of 60Kg of raw materials. Then use 50 / 100 grain size quartz sand mixed with 5-8% rapeseed oil to make the sand riser and rain block, and heat the sand riser and rain block to 200-400°C and keep it warm for 1.5-2.5 h; Then clean the sand cover riser and rain block, repair the small head of the rain hole to Ф6...

Embodiment 3

[0044] Example 3. A cast tin bronze for the friction pair of an aviation hydraulic pump, comprising 9-11% tin, 6-8% nickel, 2-3.3% lead, 0.2-0.5% zinc, and 0.1% oxidized rare earth CeO 2 , 0.01 to 0.1% phosphorus, and the rest is copper.

[0045] The smelting method of casting tin bronze for the friction pair of aviation hydraulic pumps first prepares the raw materials for making tin bronze, including 5.6Kg of pure tin, 1.35Kg of pure lead, and 19.89Kg of copper-nickel alloy (containing 3.78Kg of nickel, and the rest is copper) , 0.3Kg of pure zinc, 0.06kg of rare earth oxide, 0.4kg of phosphorus copper (containing 0.06kg of phosphorus, the rest is copper), 32.4Kg of pure copper, and a total of 60Kg of raw materials. Then use 50 / 100 grain size quartz sand mixed with 5-8% rapeseed oil to make the sand riser and rain block, and heat the sand riser and rain block to 200-400°C and keep it warm for 1.5-2.5 h; Then clean the sand cover riser and rain block, repair the small head ...

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Abstract

The invention discloses casting tin bronze for an aviation hydraulic pump friction pair and a melting method of the casting tin bronze. The casting tin bronze comprises, by weight, 9-11% of tin, 6-8%of nickel, 2-3.3% of lead, 0.2-0.5% of zinc, 0.08-0.12% of rare earth oxide, 0.01-0.1% of phosphorus and the balance copper. The raw materials for preparing the tin bronze comprise, by weight, 9-11 parts of pure tin, 2-3.3 parts of pure lead, 30-40 parts of copper and nickel intermediate alloy, 0.2-0.5 part of pure zinc, 0.1 part of rare earth oxide, 0.067-0.67 part of phosphor copper and the balance pure copper, wherein the copper and nickel intermediate alloy contains 18-20% of nickel and the balance copper, and the phosphor copper contains 13-15% of phosphorus and the balance copper. The casting tin bronze has the advantages of being high in bearing capacity and abrasion resistance and small in expansion coefficient and can meet the development requirements of the new generation of aviation hydraulic pump friction pairs.

Description

technical field [0001] The invention belongs to the field of materials for the parts constituting the friction pair on the aviation hydraulic pump, and in particular relates to cast tin bronze for the friction pair of the aviation hydraulic pump and a melting method thereof. Background technique [0002] The aviation hydraulic pump is a complete set of devices on the aircraft that use oil as the working medium and rely on oil pressure to drive the actuator to complete specific manipulation actions. The aviation hydraulic pump is a small and precise friction system. The life of the friction pair in the pump is the key factor determining its service life and reliability; Use tin bronze and nitrided steel pairing, such as ZQSn10-2-3 type tin bronze paired with 38CrMoAlA type nitrided steel, QSn6.5-0.1 type tin bronze paired with 38CrMoAlA type nitrided steel, ZQSn10-2-3 type tin bronze Pair with 25Cr3MoA type nitrided steel, QSn6.5-0.1 tin bronze with 25Cr3MoA type nitrided st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/02C22C1/03C22F1/08
CPCC22C1/03C22C9/02C22F1/08
Inventor 滕海山吴小芳邹小端张洪珍唐江
Owner AVIC LIYUAN HYDRAULIC
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