Rubber product for nuclear power main pump shaft seal O-shaped sealing ring and preparation method of rubber product

Abstract

The invention discloses a rubber product for a nuclear power main pump shaft seal O-shaped sealing ring. Raw materials of the rubber product comprise the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 5 parts-10 parts of an activator, 1 part-2 parts of an anti-aging agent, 4 parts-7 parts of a wear-resistant agent, 30 parts-40 parts of high wear-resistant carbon black, 50 parts-60 parts of radiation-resistant anthracene oil carbon black, 5 parts-7 parts of a composite hardening agent, 10 parts-15 parts of a plasticizer, 3 parts-7 parts of a vulcanizingagent, 0.5 part-2 parts of an accelerant, 0.5 part-0.7 part of nano graphene and 500 parts-700 parts of absolute ethyl alcohol. In addition, the invention further provides a method for preparing the rubber product for the nuclear power main pump shaft seal O-shaped sealing ring. The rubber product for the nuclear power main pump shaft seal O-shaped sealing ring can achieve the high-temperature-resistant and high-pressure-resistant auxiliary sealing function for shaft seal, meet the nuclear power technical requirements and improve the nuclear safety of a nuclear power plant. The research blankof the rubber product for the nuclear power main pump shaft seal in China is filled.

Description

technical field [0001] The invention belongs to the technical field of nuclear power plants, and in particular relates to a rubber product for a nuclear power main pump shaft seal O-shaped sealing ring and a preparation method thereof. Background technique [0002] The sealing and safe operation of nuclear power equipment directly affect the safety of nuclear power plants. Under accident conditions such as SBO (power outage), the nuclear power plant is in a high-temperature, high-pressure environment. The key to preventing nuclear leakage lies in the sealing ability of nuclear power equipment, and these The sealing ability of equipment directly depends on the performance of rubber products. Therefore, the quality of rubber products is affecting the safe operation of nuclear power plants under normal working conditions and accident conditions. The nuclear power main pump is one of the key equipment of the nuclear power plant. In the field of nuclear power plant technology, th...

AI Technical Summary

Problems solved by technology

The nuclear power main pump is one of the key equipment of the nuclear power plant. In the field of nuclear power plant technology, the requirements for the O-ring of the shaft seal of the nuclear power main pump are: under the condition of the reactor SBO accident (power failure of the whole plant), it can withstand the temperature of 292 ℃, 15.8MPa Under pressure conditions, the sealing function can be maintained for more than 72 consecutive hours without leakage. The conventional EPDM rubber on the market cannot meet the requirements at all. At present, the O-rings used for the shaft seal of nuclear power main pumps in my country are all imported, which are expensive and require a long procurement cycle. Therefore, it is very necessary to independently develop rubber products for O-ring seals for nuclear power main pump shaft seals that are suitable for the operation of nuclear power plants in my country.

[0003] At present, the research on improving the performance of rubber products by nano-materials in EPDM rubber is very extensive. Nano-materials have the characteristics of small particle size and large specific surface area, which can endow rubber products with excellent radiation resistance and high temperature resistance. However, due to the existence of small molecule effects, nanomaterials are difficult to disperse.