Q1:What is the function of the steam turbine main bearing?

A:Bearings are an important component of steam turbines. The main bearing is also called a radial bearing, and its function is to bear the entire weight of the rotor and the centrifugal force caused by the imbalance of the rotor mass, and determine the correct radial position of the rotor in the cylinder. Since each bearing has to bear a relatively high load, and the rotational speed of the shaft is very high, the bearings of the steam turbine all use the bearing pad or sliding bearing based on liquid friction, and the lubricating oil with a certain pressure is used between the oil pad and the bearing pad. Form an oil film and establish liquid friction to make the steam turbine run safely and stably.

Q2:What is the function of the bearing seat and bearing cap?

A:The bearing seat is the main assembly of the bearing, and the bearing cap is the auxiliary assembly of the bearing. The bearing seat constrains the outer ring of the bearing and bears radial load together with the bearing. The bearing cap and the notch on the bearing seat constrain the axial direction of the bearing together. degrees of freedom and bear axial loads.

Q3:What is the function of the oil flinger on the bearing？

A:The oil flinger brings the lubricating oil in the bearing box to the sliding bearing along with the circular motion of the shaft, so that the lubricating oil can lubricate, wash, cool and protect the bearing.

Q4:How to install the set screw？

A:Set screws are used to fasten the relative position of two parts. When in use, first screw the screw into the internal threaded hole of the part to be fixed, and then press the end of the screw tightly on the surface of another part (or in the corresponding pit on the surface), so that the relative positions of the two parts are fixed down. Slotted and hexagon socket set screws are suitable for occasions where the screw is not allowed to be exposed, and square head set screws are suitable for occasions where the nail head is allowed to be exposed. In terms of screw compression force, slotted set screws are smaller, followed by hexagon socket set screws, and square head set screws are larger. Cone end screws are suitable for parts with low hardness; truncated cone end screws are suitable for parts with pits on the pressing surface; flat end and concave end screws are suitable for parts with high hardness or often need to adjust the fastening position; Long cylindrical end screws are suitable for tubular shafts (or thin-walled parts), and the cylindrical end of the screw is screwed into the nail hole of the tubular shaft to transmit large loads.