Property classification
According to the different materials used for sealing rings, there are different classifications in nature: 1. High temperature resistant sealing ring 2. High pressure resistant sealing ring 3. Corrosion resistant sealing ring 4. Wear-resistant sealing rings are mainly used for oil, water and corrosion protection. Leakage prevention: IDI sealing ring, UN sealing ring, UHS sealing ring, OSI sealing ring, UPH sealing ring, YX sealing ring, YA sealing ring, QY sealing ring, KY sealing ring, O sealing ring, rectangular sealing ring, star sealing ring, L retaining ring, DKB sealing ring, DKI sealing ring, DKBI sealing ring, AF sealing ring, DH sealing ring and DHH sealing ring. Drum ring, herringbone ring, fluororubber sealing ring, fluororubber sealing ring, silicone rubber sealing ring, silicone rubber sealing ring, high temperature resistant sealing ring, O-ring, coated sealing ring, fluorine coated sealing ring, Y-ring, V-ring, star ring, kdas combination ring, nok.nak. Metal coated gasket, PTFE sealing ring, sealing strip, rubber sealing ring and plastic sealing ring.
The function of various sealing rings
V-shaped sealing ring is an axial elastic rubber sealing ring, which is used as a pressureless seal for rotating shaft. The sealing lip has good fluidity and adaptability, which can compensate large tolerance and angle deviation, prevent internal grease or oil leakage, and also prevent external splash or dust intrusion. O-ring seal is mainly used for static seal and reciprocating seal. When used for rotary sealing, it is limited to low-speed rotary sealing device. V-shaped sealing ring is generally installed in the groove with rectangular cross section on the outer circle or the inner circle for sealing. Y-shaped sealing ring is widely used in reciprocating dynamic sealing device. In addition, there are spring tension (spring energy storage) sealing rings, and springs are added to PTFE sealing materials, including O-type springs, V-type springs and U-type springs. Brief introduction of sealing ring for YX hole Product use: It is used to seal the piston in reciprocating hydraulic cylinder. Scope of application: TPU: universal hydraulic cylinder and universal equipment hydraulic cylinder. CPU: hydraulic cylinder of construction machinery and high temperature and high pressure hydraulic cylinder. Material: polyurethane TPU, CPU, rubber product hardness: HS85 2 A Working temperature: TPU:-40 ~+80℃ CPU:-40 ~+120℃ Working pressure: ≤32Mpa Working medium: hydraulic oil, emulsion YX-shaped hole retaining ring Product description: This standard is applicable to cylinders with working pressure greater than 65440. Or when the cylinder is subjected to eccentric stress, it plays a role in protecting the sealing ring. Working temperature: -40 ~+ 100℃ Working medium: hydraulic oil, emulsion and aquatic products Hardness: HS 92 5A Material: YX sealing ring for PTFE shaft. Description of product use: It is used to seal the piston rod in reciprocating hydraulic cylinder. Scope of application: TPU: universal hydraulic cylinder, universal equipment hydraulic cylinder. CPU: hydraulic cylinder of construction machinery and high temperature and high pressure hydraulic cylinder. Material: polyurethane TPU, central processing unit and rubber. Hardness: HS85 2 A working temperature: TPU:-40 ~+80℃ CPU:-40 ~+120℃ working pressure: ≤32Mpa working medium: YX hydraulic oil and emulsion shaft retaining ring. Description of product use: This standard is applicable to oil cylinders with working pressure greater than 65440. Or when the oil cylinder is eccentrically stressed, the sealing ring is protected. Working temperature: -40 ~+ 100℃ Working medium: hydraulic oil, emulsion and aquatic products Hardness: HS 92 5A Material: PTFE According to the enterprise standard: O-type rubber sealing ring (GB 1235-76), briefly describe the product use: O-type in this standard. Working temperature: -40 ~+230℃ Working pressure: < 10 ~ 220kg, F/cm Working medium: air, water and oil Product hardness: 40 ~ 85 2A Material: NBR, silicone rubber, fluororubber and ethylene-propylene rubber O-ring. Brief description of product use: This standard is applicable to oil cylinder pressure greater than 65433. Working temperature:-100 ~ 200℃ Working medium: hydraulic oil, emulsion and water. Material: PTFE. According to JB/ZQ4224-86, it is suitable for GB 1235-76J frameless dustproof ring. Description of product use: it is used for dust prevention of exposed parts of piston rod or valve stem of reciprocating oil cylinder. Scope of application: TPU: construction machinery, general machinery, gas cylinder valves, etc. CPU: Oil cylinder of construction machinery, oil cylinder with poor working conditions. Material: polyurethane and nitrile rubber. Working temperature: -40 ~ 120℃. Product hardness: HS 80 5A. ※ According to JB/T 6657-1993, the sealing ring has good sealing performance and long working life. The working life of dynamic pressure seal is 5- 10 times longer than that of conventional rubber seal products, and the highest number can be reached. The friction resistance of the sealing ring is small, and the static and dynamic friction forces are equal, which is 1/2- 1/4 of the friction force of "0" rubber ring, which can eliminate the "crawling" phenomenon of moving at low speed and low pressure. The sealing ring is highly wear-resistant, and the sealing surface has the function of automatic elastic compensation after wear. ※. The sealing ring has good self-lubricating performance and can be used as an oil-free lubricating seal. ※. The sealing ring has simple structure and convenient installation. ※. Working pressure of sealing ring: 0-300mpa. ※: . Working speed: ≤15m/s ※: Working temperature: -55-250℃. Suitable media for sealing rings: hydraulic oil, gas, water, mud, crude oil, emulsion, water-glycol, acid, alkali, chemicals, etc. Sealing ring standard in this paragraph can be divided into O-ring, star-shaped sealing ring, X-ring, hollow tube sealing ring, V-ring, L-ring, U-ring, Y-ring and special-shaped sealing ring according to sealing ring section. ※. According to materials, it can be divided into nitrile rubber sealing ring, natural rubber sealing ring, neoprene sealing ring, EPDM sealing ring, hydrogenated nitrile rubber sealing ring, silicone sealing ring, fluororubber sealing ring and silicone fluororubber sealing ring. The standard of sealing ring is ID inner diameter *CS wire diameter. According to the installation requirements of sealing ring, sealing ring is the most important and effective means to solve the leakage problem of hydraulic system. If the sealing ring of the hydraulic system is not good, the sealing ring may leak, and the leaked oil will pollute the environment; It may also make air enter the oil suction cavity, which will affect the working performance of the hydraulic pump and the stability of the hydraulic actuator. Therefore, it is very important to choose and design the sealing ring device reasonably in the design of hydraulic system. The requirements for sealing ring device are as follows: 1. The sealing ring should have good sealing performance in a certain working pressure and temperature range, and can automatically improve the sealing performance with the increase of pressure. 2. The friction between the sealing ring device and the moving parts should be small and the friction coefficient should be stable. 3. The sealing ring has strong corrosion resistance, is not easy to age, has long service life and good wear resistance, and can automatically compensate to a certain extent after wear. 4. The structure is simple, the use and maintenance are convenient, and the sealing ring has a longer service life.
Precautions for installation
1, clean the installation location; 2. Remove burrs during the installation of the seal; 3. Apply lubricant to the seal; 4, protect the sealing surface from damage; 5. Check whether the size of the seal is correct; 6. Use the corresponding tools to install the seals that need to be deformed and installed.
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