Analysis of Application Prospect of Construction Machinery Sealing Technology

(1) Rotary dynamic sealing system is still widely used in ordinary standard oil seals. For pressure-required rotary seal devices, pressure resistant oil seals with pressure resistance of l-3 MPa can be provided, and the international advanced level is 10 MPa. The use of return seals has not gained popularity in rotary seals for construction machinery.

(2) Hydraulic cylinder reciprocating dynamic sealing system At present, most of the domestic engineering machinery hydraulic cylinder dynamic seal system design still uses the U-shaped seal ring as the main seal. The mid-90s design and production of engineering machinery hydraulic cylinder dynamic seal system, began to use coaxial seal Composite design of components and U-shaped sealing rings. When the internationally commonly used five-component (or three-component) hydraulic cylinder pistons are combined with supporting ring seal assembly, the manufacturing process is more complicated. At present, domestic production is still in the stage of small-batch production. , Poor quality stability.

(3) In the static sealing system, although the asbestos and plant fiber sealing products have been eliminated, the use of high-molecular liquid gaskets is not yet widely used. Currently, such products used in China still use various types of sealant products manufactured by Loctite. Mainly, domestic liquid sealants and anaerobic adhesives used in hydraulic system piping system are less branded, and there is a certain gap between the coating process and quality performance.

Outlook: China's hermetically sealed research and medical seal manufacturing industry will face serious issues raised by the engineering, mechanical and other medium and high pressure hydraulic machinery industries.

With the introduction of international advanced science and technology and manufacturing technology and the development trend of the national economy after 2000, the U.S. construction machinery industry, which relies on advanced technology, will have greater development. The hydraulic pressure of the construction machinery and the advanced nature of the system, Reliable work.@Exploring the heights will surely promote the development of sealing system design and manufacturing technology of sealing components. Therefore, the research and seal manufacturing industry of China's sealing technology will be faced by construction machinery and other medium and high pressure hydraulic machinery industries. The severe problem can predict that China's sealed industrial system will no longer be a business model with high energy consumption, low efficiency, and a complex structure of small-scale farmers, but will be highly intensive, large-scale, low-energy, and high-end. An efficient management system. By then, 60% of the main types of seals in China will reach the international level of quality in the late 1980s and early 1990s, and 15% of the products will reach the contemporary quality level of international seal products. China Construction Machinery The design and application of the sealing system for medium and high pressure hydraulic machinery products will reach the technical level of the international mid-1990s.