Take you to learn wind power bearings
Bearings are the core components of wind turbines. Wind turbine bearings range from bearings used in blades, main shafts and yaws to high speed bearings used in gearboxes and generators. Let's take a look at the wind power bearing with the small series!
Bearings for wind turbines mainly include: yaw bearings, pitch bearings, spindle bearings, gearbox bearings, and generator bearings. Namely: pitch bearings, yaw bearings, transmission system bearings (spindle and gearbox bearings).
Production process of wind power bearings:
1. To control the forging temperature, do not have coarse grains;
2. It is necessary to control the modulation process and ensure the quenched and tempered structure of the heart to ensure its mechanical properties;
3. Control of the depth of the intermediate frequency quench hardened layer of the surface;
4. Avoid micro cracks on the surface.
Design and analysis:
Still based on the empirical analog design, the force analysis and load spectrum research are almost blank. The difficult technology is for the requirements of the spindle bearing for trouble-free operation up to 13*104h and above, and has a reliability of more than 95%; high load capacity design for high damage rate of gearbox bearings.
Different parts of the bearing use different materials and heat treatment, such as improving the low temperature (ambient temperature -40 °C ∽ -30 °C, bearing working temperature is about -20 °C) of the mechanical properties of 40CrMo steel for yaw and pitch bearings. Heat treatment method, surface induction hardening depth of hardened layer, surface hardness, soft belt width and surface crack control; speeder bearing equivalent to foreign STF, HTF steel development and control of the best content of retained austenite The spindle bearing is made of electroslag remelted carburizing steel ZG20Cr2Ni4A under the condition that there is still a certain gap in the quality of domestic vacuum degassing steel.
Reprinted from the network