Preparation method of corrosion-resistant light piston for fuel cabin

A corrosion-resistant, fuel tank technology is applied in the field of preparation of corrosion-resistant lightweight pistons for fuel tanks, which can solve the problems of strong corrosion, large self-mass, fuel leakage, etc., to improve the interface bonding strength, and the treatment method is simple and easy to implement. , the effect of improving corrosion resistance

Pending Publication Date: 2022-07-22
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of the physical and chemical properties of the above-mentioned fuels, the application of metal pistons in the fuel tank has the following disadvantages during the long-term storage process: (1) Its own mass is relatively large, which will cause deformation of the conduit, resulting in a gap between the piston and the bulkhead, resulting in fuel leakage
(2) Reactive fuels are highly corrosive to the metal materials of the cabin during the static long-term storage process, and the use of traditional metal storage tanks and pistons will cause problems such as a decrease in fuel safety
However, the yield rate in the manufacturing process is only 50%, and problems such as product cracking are prone to occur

Method used

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  • Preparation method of corrosion-resistant light piston for fuel cabin
  • Preparation method of corrosion-resistant light piston for fuel cabin
  • Preparation method of corrosion-resistant light piston for fuel cabin

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preparation example Construction

[0053] like figure 1 As shown, a method for preparing a corrosion-resistant lightweight piston for a fuel tank, comprising the following steps:

[0054] ⑴Weigh the following components by weight percentage: 40%~90% of polyetheretherketone (PEEK) powder, 5%~45% of inorganic short fibers and 0.1%~5% of carbon nanoparticles.

[0055] Among them: the weight average molecular weight of the polyetheretherketone (PEEK) powder is 65000~80000g / mol. The molecular weight of the resin matrix will affect the physical and mechanical properties of the piston and the molding process. The lower molecular weight will make the molecular chain entanglement weaker, and the mechanical strength of the piston will be reduced; too high molecular weight will lead to high molding temperature and resin melting. Mobility decreases.

[0056] The inorganic short fibers are glass fibers or carbon fibers. Glass fiber is alkali-free fiber, its length is more than 1mm chopped fiber, the fiber degree is 2000~...

Embodiment 1

[0073] Embodiment 1 A method for preparing a corrosion-resistant lightweight piston for a fuel tank, comprising the following steps:

[0074] (1) Weigh the following components: polyetheretherketone (PEEK) powder 64%, glass fiber 33%, graphene 3%.

[0075] (2) Fiber liquid-phase oxidation: soak the glass fiber to 1000ml of a mixture of nitric acid and sulfuric acid, control the temperature to 60 °C, stir for 60 minutes, cool and stand for centrifugation, wash the precipitate with distilled water, adjust the pH to 7, and then adjust the pH to 7 at 100 °C. Dry at °C.

[0076] (3) Fiber epoxidation: Dissolve 350g m-chloroperoxybenzoic acid (mCPBA) in 2000ml chloroform solvent; then immerse 1320g surface-oxidized glass fiber in chloroform solution for more than 4 hours. Intermittent stirring; after the reaction is completed, it is processed by standing, centrifugal filtration and drying.

[0077] (4) Dispersion of carbon nanoparticles: Add 120 g of graphene to 2400 ml of polyeth...

Embodiment 2

[0088] Embodiment 2 A method for preparing a corrosion-resistant lightweight piston for a fuel tank, comprising the following steps:

[0089] (1) Weigh the following components: 50% polyetheretherketone (PEEK) powder, 45% carbon fiber, and 5% carbon nanotube.

[0090] (2) Fiber liquid-phase oxidation: soak the glass fiber to 1500ml of nitric acid and sulfuric acid mixture, control the temperature to 60℃, stir for 60 minutes, cool and stand for centrifugation, wash the precipitate with distilled water, adjust the pH to 7, and then adjust the pH to 7 at 100 Dry at °C.

[0091] (3) Fiber epoxidation: Dissolve 350g m-chloroperoxybenzoic acid (mCPBA) in 2800ml 2000ml imitation solvent; then soak 1800g surface-oxidized carbon fiber in chloroform solution for more than 4 hours, in this process, the material is subjected to Intermittent stirring; after the reaction is completed, it is processed by standing, centrifugal filtration and drying.

[0092] (4) Carbon nanoparticle dispersi...

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Abstract

The invention relates to a preparation method of a corrosion-resistant light piston for a fuel cabin, which comprises the following steps of: (1) weighing the following components in percentage by weight: 40 to 90 percent of polyether-ether-ketone (PEEK) powder, 5 to 45 percent of inorganic short fiber and 0.1 to 5 percent of carbon nano particles; (2) fiber liquid phase oxidation; (3) fiber epoxidation; (4) dispersing carbon nanoparticles; (5) mechanically mixing; (6) kneading materials; (7) piston hot-press molding; (8) carrying out heat treatment on the piston blank; and (9) machining the piston blank. The yield can be effectively improved, a product is not prone to cracking, the obtained polymer composite piston can greatly reduce the dead weight of a fuel supply cabin, has good corrosion resistance and is particularly suitable for hydroxylamine perchlorate and mixed fuel thereof, the sealing reliability in the fuel extrusion process is remarkably improved, and the service life of the fuel supply cabin is prolonged. And the structural strength and the operation reliability of the piston under the low-pressure-difference working condition can be met.

Description

technical field [0001] The invention relates to the technical field of underwater turbine engines, in particular to a preparation method of a corrosion-resistant lightweight piston for a fuel tank. Background technique [0002] Turbine engine has the characteristics of low air consumption, large enthalpy drop and simple structure, and is one of the main power propulsion systems to improve the operating speed of underwater vehicles. The tightness of static storage fuel and the stability of fuel supply are related to the reliability of the turbine engine; therefore, as an important device for storing and supplying fuel, the fuel supply tank has become an integral part of the underwater turbine engine propulsion system. At present, there is an urgent need to develop compact and compact fuel supply devices and technologies. [0003] The reactive fuel using hydroxylamine perchlorate (HAP) as the oxidant is the main fuel of the cabin supply system, which can overcome the shortcom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C43/00B29C43/02C08L61/16C08L79/02C08K9/04C08K9/02C08K7/14C08K7/06C08K3/04
CPCB29C43/003B29C43/02C08L61/16C08K2201/011C08L79/02C08K9/04C08K9/02C08K7/14C08K7/06C08K3/041C08K3/042
Inventor 王宏刚冯要飞刘文广高贵马晓励杨生荣张俊彦马小录
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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