Causes of oil seal damage of high-temperature resistant hot oil pump:

1. Several auxiliary sealing rings of hot oil pump have defects or defects caused by improper assembly, and the selection of auxiliary sealing rings is not suitable for mining medium.

2. The sealing surface between the moving ring and the static ring of the hot oil pump has excessive wear, unreasonable load coefficient during design, causing cracks, deformation, damage and other phenomena on the sealing surface.

3. The sealing end face of hot oil pump is not tightly fitted due to the excessive vertical deviation between the sealing end face of the rotor and stator ring and the axis center line, resulting in leakage.

4. Due to the large axial channeling momentum of the shaft, it is easy to produce leakage due to the combination of components related to the seal or poor quality.

5, spring pretension force is not enough or long time running, fracture, corrosion, relaxation, coking and working medium suspended particles or crystals accumulated in the spring gap for a long time, resulting in spring failure, compensation ring can not float, leakage occurs.