What is the working principle of turbine bearings in power plants?
There is no principle. The oil film is formed between the shaft journal and the bush by using the turbine oil, so that the friction between the two wheels is very small.
With the turbine turn the rotor speed up, because the lubricating oil viscosity in shaft driven by more and more oil into the shaft and bearing the formation of oil contracts, oil pressure rises gradually, the rotor will slowly lift to the speed of the shaft neck on the formation of oil film stability, the above is the sliding bearing the working principle of. The whole process can be divided into dry friction, semi dry friction, half liquid friction, and whole liquid friction.
The working principle of steam turbine sliding bearings:With the turbine turn the rotor speed up, because the lubricating oil viscosity in shaft driven by more and more oil into the shaft and bearing the formation of oil contracts, oil pressure rises gradually, the rotor will slowly lift to the speed of the shaft neck on the formation of oil film stability.Attached:The role of steam turbine support bearings:Bear the weight of the rotor and the centrifugal force of the unbalanced mass of the rotor, and determine the radial position of the rotor to ensure that the rotor center is identical to the center of the cylinder to maintain the correct radial clearance between the rotor and the rest.The role of thrust bearings in steam turbines:The axial thrust of the rotor is not balanced, and the axial position of the rotor is determined to ensure the correct axial clearance between the moving and static parts.
