The level of sealing material products continues to improve

In response to sealing requirements under high-speed, high-pressure, and wide-temperature conditions, my country's scientific research institutions have actively carried out research on related materials and products. At present, a series of products have been formed, which solves the urgent need for sealing technology in the hydraulic and pneumatic industries, and the level of products is continuously improved.

It is reported that my country’s self-developed high-performance sealing materials and products have been widely used in aerospace, aviation, weapons, ships, civil machinery industry and other fields. They are used in the sealing of special vehicle transmission systems in the ordnance industry, anti-friction sleeves, and high pressure. , High-temperature gas sealing plugs have also been used, and reciprocating sealing and radiation-proof sealing materials have also been promoted on special ships.

My country's static sealing materials and products have reached a very high level. Static sealing relies on closing the gap between the joint surfaces to achieve the sealing effect. It is selected according to different media, different working temperatures, and different sealing application environments. Static sealing products include seals of different sizes (O-rings, Y-rings, V-rings and other non-standard gaskets, sealing rings, etc.), which are mainly used for various flat static seals and end-face guide groove seals , Cylindrical surface static seal, dust-proof seal, vehicle window frame, door seal, etc., has provided high-performance sealing products for a variety of new special equipment, aerospace technology, and civil vehicles.

The temperature adaptation range of rubber products is wide. Among them, wide temperature range special silicone rubber varieties include high temperature resistant type, ablation resistant type, high strength type, ultra-low temperature type, etc., and have the ability to further research and develop, and can provide various O-shaped, special-shaped sealing rings, gaskets and other sealing products ; Special nitrile rubber has excellent properties such as oil resistance, high and low temperature resistance, high strength and high elasticity. The material has mature technology and stable technology. It can withstand most hydraulic oils, mechanical oils, and lubricating oils. It has a wide applicable temperature range, generally- 50℃～130℃, can withstand high temperature of 150℃ in a short time, and can be used to manufacture fixed or movable seals, valve parts and various gaskets, gaskets, sealing strips, etc. that work in various oils. Can provide various specifications of products, and provide product installation life estimation technology; small seals made of special fluorosilicone rubber materials and products, long-term working temperature of -55～200℃ in fuel oil and air medium with oil vapor, The short-term working temperature can reach 250℃, and it can meet the requirements of -55～150℃ long-term working and 165℃ short-term working in naphthalene-based fuel, mineral oil, double-sided gear lubricating oil and other media.

High-speed rotating seal products are fluid dynamic oil seals designed using the principles of fluid mechanics. This structure organically unifies the sealing and lubricating effects, reduces the working temperature and friction and wear of the lip, and has a lifespan that is doubled compared to similar products. The hydrodynamic oil seal made of low-friction formula fluorine rubber not only adapts to higher linear speeds and harsh operating conditions, but also reduces the processing requirements of the shaft, can adapt to eccentricity of 0.25mm or greater, and has a relatively general life. The oil seal is greatly extended, and it has passed the test of the linear speed 20-25m/s, the pressure 0.01-0.05MPa, the working temperature -40-180℃, and the 800h bench. It can provide services such as series products that meet the national standard and performance evaluation and assessment.

High-pressure reciprocating sealing products are a combined sealing system with high pressure resistance, wear resistance and low friction. When the pressure of the working medium increases, the sealing pressure also increases to ensure reliable sealing under high pressure conditions. Among high-temperature and high-pressure gas sealing materials and products, air-tight gaskets have also made great progress as a key part of special equipment, which overcomes the shortcomings of existing air-tight gaskets and can ensure that special equipment is airtight under various special conditions. Reliability, strong adaptability, convenient operation and good interchangeability. The anti-corrosive gasket sealing material is being popularized and applied in a variety of special devices.