Causes of heating of valve drive device (worm gear box)
(1) The valve drive device leaks oil;
(2) Worm gear wear;
(3) The drive pinion helical gear is worn;
(4) The bearing (at the worm) is damaged;
(5) The oil level is too low, and the oil supply on the bearing is insufficient, which first shows that the bearing cap has a fever.
The valve drive unit heats up and leaks oil.In order to improve the efficiency of the valve drive device (valve worm gear box), non-ferrous metals are generally used as the worm gear, and the worm is made of harder steel. Because it is a sliding friction transmission, higher heat will be generated during operation, so There is a difference in thermal expansion between the parts and the seal of the valve drive device, which creates a gap in each mating surface, and the oil becomes thinner due to the increase in temperature, which is likely to cause leakage.
There are four main reasons:
The first is whether the collocation of materials is reasonable;
The second is the surface quality of the meshing friction surface;
The third is the choice of lubricating oil and whether the addition amount is correct;
The fourth is the assembly quality and use environment.