What is the selection method of sealing ring of CNC bending machine under high temperature?

What is the selection method of sealing ring of CNC bending machine under high temperature standard?

Using high temperature rubber seals: in high temperature, the heat resistance of CNC bending machine is very important. Effective selection of sealing statistical data can make the sealing performance of hydraulic press still applicable to high temperature operation standard, simplify the procedure flow and save costs. Table 10-1 lists the application limits of different rubber seals.

The sealing structure adopts the sealing property of corrugated hose numerical control bending machine or the sealing property of corrugated hose fusion universal numerical control bending: from the perspective of temperature resistance, the auxiliary sealing ring is the weak stage on the basis of the hydraulic seal of numerical control bending machine. When the temperature is over 80 ℃, usually vulcanized rubber is not suitable. If the temperature exceeds 230-250 ° C, PTFE cannot be used. In addition, because of the high temperature, the accumulation of pyrolysis materials in flammable substances will block the elasticity of yellow. Therefore, when the temperature is higher than 220 ℃, the numerical control bending machine of corrugated hose type should be used for sealing. It may be applied to the sealing structure combined with the sealing of corrugated hose and universal CNC bending machine.

Selection of water cooling method: in high temperature, in order to ensure the reliability of the actual operation of the hydraulic seal, the hydraulic seal should be cooled by water as much as possible, and to prevent working in dry conflict. The temperature in the persistent sealing space is lower than the volatile temperature of the sealing liquid. The way of water cooling is to control the temperature of sealing property. Common temperature controls include cleaning, plugging and liquid circulation systems.

At high temperature, the following options can be applied: (1) diphy1 (diphenyl and diphenyl compounds) is used as blocking liquid, which is a cold non working pressure heat exchanger (blocking liquid is transported according to the underwater concrete screw rod); (2) if there is no proper liquid under pasteurization, it can prevent air oxidation caused by gas according to N2 or argon.