wind power bearing technical characteristics

wind power bearing technical characteristics: a yaw bearing mounted on a tower and the cockpit of the connecting portion, the pitch bearing mounted in the hub and connected to the root portion of each blade. Each wind turbine with a yaw bearing and three pitch bearings. Yaw, pitch bearing rings of material selection 42CrMo, heat treatment with the overall quenching, raceway surface hardening. Yaw, pitch bearing force situation is complex, and to withstand shock and vibration is relatively large, and therefore, requires both bearings to withstand the impact, and can bear a greater load. Wind turbines host life requirements of 20 years, a larger bearing installation costs, thus requiring yaw, pitch bearing life expectancy should reach 20 years. Bearing rings substrate hardness 240-280HB, able to withstand impact without plastic deformation, while the raceway surface hardening hardness 55-62HRC, increase contact fatigue life, thus ensuring long life bearing requirements. Wind power bearing parts cleaning because cross, three row roller slewing bearing inner ring special technology: To prevent cross, after three-row roller slewing bearing inner heat deformation, must be working in pairs when turning, the race back to back processing, do not be cut off before the heat treatment, heat, cut molding.

Rotary classification and application of Slewing bearings

Slewing bearings are extremely important in today's heavy industry large bearing diameter ranging from 10cm to 10 meters, almost all of the large equipment reciprocating circular motion is essential, it is able to withstand a large-scale integrated load bearing, can bear large axial, radial load and overturning moment. Slewing ring bearings are generally installed with a hole, the internal gear or the external gear, lubricants holes and sealing devices, which enable the host compact design, the guide is simple, easy to maintain. Slewing bearings commonly used classification of a single row of five four-point angular contact ball slewing bearings, Single row crossed roller slewing bearing, double-row ball slewing bearing, three-row roller combination slewing bearings and slewing bearings light. Slewing ring bearings are widely used for lifting machinery, mining machinery, construction machinery, port machinery, ship equipment and high-precision radar and missile launchers and other mechanical equipment of large rotary device. But also according to the user's specific requirements and design, development and production of special structures slewing ring bearings.

Analysis of wind power bearing load zones

In roller bearings generally run only part withstand the load, and the area where this part of the roller bearing area we call the bearing. The bearing load size, running clearance will have an impact on the size of the load zone. If the bearing area is too small, the roller in the actual operation is prone to slippage. For wind power gear box, if the spindle is designed with double bearing support program, then theoretically only torque is transmitted to the gearbox. In this case, through simple mechanical analysis, we find that the planet carrier supporting the bearing load is relatively small, so the bearing area of the bearing often relatively small, roller prone to slippage. In the wind turbine gearbox design carrier support bearings generally use two single row tapered roller bearings or cylindrical bearings two full programs. We can appropriately preloaded tapered roller bearings or cylindrical roller bearings reduce clearance methods to improve the bearing area.

Wheel bearing performance

Developed on the basis of the hub bearing unit is the standard angular contact ball bearings and tapered roller bearings on, it will be two sets of bearings as a whole, with good assembly performance, you can omit clearance adjustment, light weight, compact, load capacity large, sealed bearings can be pre-loaded for the grease, hub seals and maintenance, etc. are omitted from the external wheel, have been widely used in cars, the truck also has a tendency to gradually expand the application. Car wheel bearings are used in pairs in the past most of single row tapered roller or ball bearings.

Roller wheel bearings

Single-row cross roller wheel bearings, composed by the two seat, compact, light weight, high manufacturing precision, small assembly space for the installation of high precision, the roller is 1: 1 staggered, can withstand the axial forces, tilting moment and large radial force, is widely on lifting transport, engineering machinery and military products for.Triple row roller slewing bearing has three seat, up and down and radially separated from each raceway, so that each row roller loads can be determined exactly.

Ball Wheel bearings

Single-row four point contact ball bearing turntable by the inner, outer, ball, isolated block of four major components, compact, light weight, ball and roller contact with a four-point arc path, can withstand the axial force, radial forces. Rotary conveyer, welding operation machine, small cranes and excavators and other engineering machinery can be selected. Double row ball bearing turntable with three seat, ball and isolation blocks can be directly discharged into the upper and lower raceway, according to the situation by force, arranged two rows of different diameter steel balls. This assembly is very easy to open, bearing raceways arc angle up and down are 90 °, can withstand great axial force and tilting moment. Double-row ball slewing bearing axial, radial dimension than the larger, structural tightening. Especially for applications that require above average diameter of tower cranes, truck cranes and other handling machinery.

Wheel bearing

Wheel bearings are one of the key parts of the car, its main role is to carry the weight and provide an accurate guide for the rotation of the hub, which requires that it not only can withstand axial load also bear the radial load. Conventional car wheelWith the two sets of tapered roller bearings are roller bearings or ball bearings combination, bearing installation, oiled seals and clearance adjustment is carried out in a car production line. This structure makes it difficult to assemble in the car manufacturing plant, high costs, poor reliability, and car maintenance maintenance, but also on the bearing cleaning, oiling and adjustment.