Phenolic fabric guide / support ring has excellent mechanical and chemical properties, compared with nylon, POM or PTFE and other commonly used engineering materials, it has better hardness, compressive strength, thermal deformation temperature, self-lubricating wear resistance, impact resistance and other properties.
The characteristics of Phenolic fabric guide ring:
1. Good dimensional stability: the linear expansion coefficient of phenolic fabric support ring is about 1/2 lower than that of general engineering plastics, and the water absorption is also smaller than that of nylon.
2. The interference of the product pressing and matching gap is easier to control.
3. High temperature resistance: phenolic fabric support ring has high thermo-mechanical and thermo-chemical stability. The long-term use temperature of general engineering plastics is about 80-90 ℃, while phenolic fabric can be as high as 130 ℃, expanding the range of use.
4. Good wear resistance: compared with bronze, phenolic fabric guide ring's hardness is lower, has good wear resistance, easy to close, and will not wear the shaft. As a precision bearing, the complex grinding process can be avoided. In addition, it can increase the real contact area caused by friction, which also reduces the actual load, thus reducing wear.
5. High load capacity: compared with commonly used engineering plastics, phenolic fabric guide / support ring has higher mechanical strength, such as compressive strength, the former is about 2-4 times of the latter, and the specific gravity is only 1/4 of the bronze, so it also has higher specific strength.
6. Outstanding compatibility: because the molecular structure of phenolic fabric wear ring is mainly composed of hydrocarbon chain molecules, its molecular structure is similar to that of minerals. Therefore, it has special lipophilicity and compatibility, even in the case of harsh lubrication conditions. Such as frequent opening and closing, intermittent movement, swing movement and other cases of friction between the fluid power lubricating oil film is difficult to form, it can still maximize the use of trace grease, so as to greatly extend the refueling maintenance cycle and service life.
7. Good hydrophilic characteristics: phenolic fabric guide support ring with special additives also has good hydrophilic properties, it can be in the oil free working conditions, long-term safety in water cooling or work in water, without a set of complicated lubrication sealing device.
8. Suitable elastoplastic properties: Phenolic fabric guide ring is an elastoplastic material. Compared with bronze, cast iron and other materials, it is easy to assemble, but also has the function of absorbing vibration and noise, reducing the impact force of the machine in motion, so as to delay the damage of the machine. Compared with general engineering plastics, it is not easy to produce plastic deformation and affect its supporting function.
