Fault analysis of thermal resistance wires in use

The wires of the thermal resistor are soaked in the oil grooves of the guide bearing and thrust bearing for a long time during use, making the wires hard and brittle, and difficult to bend. There are many cracks on the surface of the wire, and in severe cases, cracks also appear on the core wire inside the wire, with the wire core exposed on the outside. To solve this problem, attention should be paid when choosing,
1, There are many cracks on the surface of the wire:
Oil resistant and temperature resistant thermal resistance wire materials should be selected, such as perfluoroethylene propylene (FEP) abbreviated as f-46, which is a copolymer of tetrafluoroethylene and hexafluoropropylene and a modified material of polytetrafluoroethylene. They have excellent oil resistance, corrosion resistance, and heat resistance, and can be used for a long time at temperatures ranging from -250 to 250 ℃. In addition, their crack resistance is also very outstanding, which can completely solve the problem of wires cracking after being soaked in oil for a long time.
2, The situation where the thermal resistance wire breaks:
Some thermal resistors have serious wire breakage at the root, some are directly broken, and some have disconnected external insulation layers. To solve this problem, we can install a spring protection device at the back end of the sensor to prevent wire root breakage caused by oil flow impact, vibration, and bending; It is also possible to extend the sensor root with armor wire all the way out, so that the part of the wire that is impacted by oil flow is entirely armor wire. Since armor wire can be bent arbitrarily, the wire becomes a wire with a stainless steel shell, completely solving the problems of wire corrosion and impact caused by oil. Longer service life and more reliable performance.
3, The diameter of the thermal resistance wire is too small, including the outer diameter of the wire and the diameter of the single stranded wire core.
To solve this situation, when customizing a thermal resistor, everyone should choose according to their actual situation. Generally, the outer diameters of the thermal resistor wires that can be selected are: about 5mm for three core and four core, and about 6mm for 6-core. The thermal resistance wire is equipped with a mesh shielding layer and a silver plated core, which has very stable performance.