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Room-temperature curing coating with abradable sealing function and preparation method thereof

A room temperature curing and functional technology, applied in the direction of epoxy resin coatings, coatings, etc., can solve the problem that the abradable coating cannot meet the needs of use, and achieve the effects of excellent abradability, improved efficiency, and reduced loss

Active Publication Date: 2020-04-10
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of high bypass ratio engines in my country, the sealing coating on the fan / supercharger stage is large in size and the related substrate is made of composite materials. The heat-cured abradable coating can no longer meet the needs of use. Therefore, Urgent need to develop new room temperature curing abradable sealing materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 440g of liquid epoxy resin with an epoxy value of 0.48~0.54, 40g of polysulfide rubber, and 520g of talc powder, pour them into the kneader (the feeding amount should fill two-thirds of the volume of the mixing box of the kneader), and start the kneader , and kneading and dispersing for 0.5-1 h under a vacuum of 600 mm Hg to obtain the finished product of component A of HS-200 talcum powder-filled sealing and abradable coating; weigh 115 g of diethylenetriamine as component B; Mix components A and B evenly, and apply it to the surface of the component by scraping method, and fully cure at 18~25°C (generally curing for 7 days to achieve the best performance), and then the wearable sealing coating can be obtained. The tensile strength of the coating is: 14Mpa, and the density is 1.54g / mL.

Embodiment 2

[0020] Weigh 400g of liquid epoxy resin with an epoxy value of 0.55~0.56, 32g of polysulfide rubber, and 568g of talcum powder, pour them into the kneader (the feeding amount should fill two-thirds of the volume of the mixing box of the kneader), and start the kneader , and kneading and dispersing for 0.5~1h under a vacuum of 600 mmHg to obtain the finished product of component A of HS-200 talcum powder-filled sealing abradable coating; weigh 98 g of triethylenetetramine as component B. Mix components A and B evenly, and apply it to the surface of the component by scraping method, and fully cure at 18~25°C (generally curing for 7 days to achieve the best performance), and then the wearable sealing coating can be obtained. The tensile strength of the coating is: 17Mpa, and the density is 1.58g / mL.

Embodiment 3

[0022] Weigh 420g of liquid epoxy resin with an epoxy value of 0.41~0.47, 35g of polysulfide rubber, and 555g of talc powder, pour them into the kneader (the feeding amount should fill two-thirds of the volume of the mixing box of the kneader), and start the kneader , and kneading and dispersing for 0.5~1 h under a vacuum of 600 mm Hg to obtain the finished product of component A of HS-200 talcum powder-filled sealing and abradable coating; weigh 132 g of ethylenediamine as component B. Mix components A and B evenly, and apply it to the surface of the component by scraping method, and fully cure at 18~25°C (generally curing for 7 days to achieve the best performance), and then the wearable sealing coating can be obtained. The tensile strength of the coating is: 17Mpa, and the density is 1.56g / mL.

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Abstract

The intention discloses a room-temperature curing coating with an abradable sealing function. The room-temperature curing coating is a putty-like material formed by mixing a component A and a component B, wherein the component A consists of liquid rubber, liquid epoxy resin and talcum powder; and the component B is an amine curing agent. During use, the component A and the component B are fully mixed according to the mass ratio of 100: 8-100: 15, the mixture is applied to the surface of a component through a blade coating method, and the abradable seal coating is obtained after full curing atthe room temperature. The material has good adhesive force to metal and composite material base materials, has excellent abradability and airflow erosion resistance, is used for an aero-engine fan / supercharging level part, when a coating layer rubs with a running part, the coating layer can be ground, the part is not abraded. Meanwhile, the gap between a rotating part and a non-rotating part can be controlled, the effects of air sealing and oil sealing are achieved, loss of compressed air flow and leakage of lubricating oil are reduced, the efficiency of an engine is improved, and oil consumption of the engine is reduced.

Description

technical field [0001] The invention relates to a room temperature curing coating, in particular to a room temperature curing coating with an abradable sealing function, which is mainly used to adjust and control the gap between the rotating part and the stator part of an aero-engine, and reduce the loss of compressed airflow and slippage. Oil leakage, improve engine power and reduce fuel consumption. Background technique [0002] With the increasing development of aviation technology and the increasing shortage of energy, the engine is required to have higher efficiency, and one of the important measures to improve the efficiency of the engine is the use of sealing coating, the performance of which has a great impact on the performance, reliability, and reliability of the engine. Life and maintainability have a major impact. The ideal sealing coating should have sufficient strength to resist the erosion of external particles and gases, and can be scraped. When the blade is...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D181/04C09D7/61
CPCC09D163/00C09D7/61C08L81/04C08K3/34
Inventor 陈磊吴平崔海霞李红轩周惠娣陈建敏
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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