The advantages and application points of silicon carbide seals are briefly introduced

Silicon carbide ceramic raw materials we are not unfamiliar, in industrial production application is more and more common, so silicon carbide ceramic raw materials do hydraulic seals, what are the advantages of carbon and carbon composite material hydraulic seals, what are the key points of application, today I take you to understand!

Carbon carbon composite material has the characteristics of heat resistance, corrosion resistance, heat shock resistance, long-term application without deformation, the application temperature is 1380℃, the tensile strength at 1400℃ and the tensile strength value at room temperature is the same, Therefore, carbon carbon composite material can be used in high temperature working conditions of machine seal, high temperature is very easy to cause the change of raw material properties of friction pair, so that the sealing inner hole deformation, reduce strength, and then cause the use period of machine seal to reduce. Therefore, the hot deformation, high temperature compressive strength and wear resistance of high temperature rubber seals are important to select rubber seals. Carbon carbon composite material with relatively low density, good corrosion resistance and heating performance when matching with high purity graphite and its matching low frictional resistance, high strength high quality features, completely suitable for machine sealing ring of raw materials, and therefore is widely used in high PV value, high temperature, corrosion and containing solid particulate matter under the working conditions of machine.

At present, nearly half of the raw materials used in industrial production are carbon - carbon composite materials. Carbon - carbon composite materials are produced in many ways and their characteristics are also different. According to the different manufacturing methods, there are the following categories: superheated steam calcined carbon composite materials, reflection calcined carbon composite materials, pressure calcined carbon composite materials, organic chemical gas reaction carbon carbon composite materials and organic chemical liquid phase accumulation carbon carbon composite materials. As rubber seals for mechanical equipment, the first three are more widely used. Machine seal is a kind of radial inner hole sealing equipment with the help of vibration isolator on sealing pair torque, sealing pair clamping and sealing under the mutual effect of material and vibration isolator working pressure, now the use of carbon carbon composite hydraulic seals has been more and more common.

Two, the key points of the application of carbon carbon composite hydraulic seals

Carbon carbon composite hydraulic seal is to avoid liquid or solid particles in the middle of the adjacent adhesive surface leakage of raw materials or components, and to avoid dust and moisture in the body and other external residues of the invasion of equipment and machinery equipment internal parts.

1, choose suitable hydraulic sealing materials and gear oil, and its ability to adapt to the operating temperature, and the solubility of oil.

2, and hydraulic seals relative sliding parts of the geometric figure precision (coaxiality) high material (such as hard chromium plating) and fine roughness can prolong the use of life.

(1) For the skeleton seal of hydraulic oil pump and motor shaft, it is not only stipulated that the surface roughness of the drag surface is within Ra of 0.25m, but also stipulated that hard chrome should be plated on the surface. In practical application, the axial spring force of the skeleton seal lip must be adjusted appropriately according to the details to make it loose properly. And in the installation should also use an installation sleeve specifications or thin sealing pad to maintain the sealing ring, to prevent the lip rolled up, distortion, resulting in yellow slide down.

(2) The common extrusion molding production and processing method of the inner surface of the hydraulic cylinder not only improves the roughness, but also makes the surface of the cylinder to carry out the cold hard bottom solution, which is beneficial to increase the service life of the sealing ring. In addition, the working pressure of the application, the length and type of drag surface are also very harmful to the life of the application. Therefore, the timing of "periodic testing" should be decided upon according to this criterion.

(3) The provision of surface wetting situation is good, to avoid waste invasion. Apply the required cleaning grade of hydraulic fluid and proper installation method. The detailed content above is the detailed content that I want to share with you today about "the advantages and application key points of carbon carbon composite hydraulic seals", looking forward to helping you!