Bearings are widely used in the wind power industry

Bearings are widely used in the wind power industry and is an important component parts of wind turbines most part, wind power bearing related to the entire range of used from blades, spindles and yaw bearings used in the gearboxes and generators smaller high-speed bearings in general, bearing a wind machine in the weak parts. Particularly for gearboxes, large bearing spindle and the generator can cause major malfunction in some models of wind turbines. Currently, for wind turbines The bearings consist of spherical roller bearings, ball bearings and rotating pivot bearing components.

Analysis of wind power bearing load zones

In the operation of wind power bearing roller bearings in general bear only part of the load at the same time, and the area where this part of the roller bearing area we call the bearing. The bearing load size, the size will be running clearance for bearing zone impact. 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.

wheel bearing

Traditional automotive wheel bearing by two sets of tapered 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 in automobile production plant assembly difficulties, high costs, poor reliability, and maintenance of the car at the service points, also need to be cleaned bearings, oiled and adjusted. Developed on the basis of the wheel 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 structure, large load capacity, can be pre-loaded to grease sealed bearings, hub wheel and external seal omitted from maintenance etc., have been widely used in cars, the truck also has a tendency to gradually expand the application.

A wide variety of lifting machinery bearings

In bridge engineering used in lifting machinery, depending on its construction and performance, and can be divided into small light lifting equipment, bridge type crane and jib type cranes, cable cranes four categories. Small light lifting equipment such as : Jacks, pneumatic hoists, electric hoists, balancing gourd (aka balance suspended), winches, etc.Bridge type crane as beam cranes, gantry cranes. Such as fixed jib type crane slewing cranes, tower cranes, truck cranes, tire cranes, crawler cranes. Cable cranes as lifts. Lifting classification by lifting TYPE: mobile cranes, tower cranes, mast crane. Form of the structure, the crane can be divided into small light lifting equipment, bridge type (bridge, gantry crane), arm shelf (self-propelled, tower, gantry, rail-style, floating boat-mast cranes), cable type. Arm erecting cranes and bridge crane features basically the same. In round ground and over the job, and more for handling and installation and other outdoor work, portal cranes, floating cranes, derricks, cranes line the walls and deck crane bearing and so on.Arm erecting cranes include: hoisting mechanism, luffing mechanism, rotation mechanism. With the action rely on these institutions can within a certain weight lifting and handling cylindrical space. Arm mounted on erecting cranes more other forms of transport on the vehicle (mobile) tool, which constitutes a running boom started rotating crane. Such as mobile cranes, rubber-tyred cranes, tower crane bearing, portal cranes, floating cranes, railway cranes.

Cylindrical Roller Bearings Structure and Properties

Cylindrical roller bearings roller line contact with the raceway, large radial load capacity, it is compared with the same size series of deep groove ball bearing have a greater radial load carrying capacity, but for the mating shaft and installation coupled with high accuracy requirements, when the center line of the outer shaft mounted tilted, causing the roller raceway contact with the surface deterioration, affecting bearing life, reduce the carrying capacity, generally the maximum allowable housing the inclination angle of 1.5 ° -3 °. Roller guided on both sides by the inner wall/outer ring, but also for high-speed rotation.

Thin wall bearing the classification

thin wall bearings for extremely thin section bearing, but also to achieve a compact, lightweight, product diversity of products has expanded its range of purposes - Thin ring bearing can be deep groove ball bearings, four point contact bearings or angular contact ball bearings, high precision such slim ball bearing, very quiet and strong carrying capacity. These ball bearings have three designs, and extremely small, mostly square cross-section. In these series, even larger shaft diameters and bearing bore, the cross-section remains unchanged, these bearings so called Cross Section.

Slewing ring

Slewing ring wide range of applications, mainly used for lifting machinery (truck cranes, offshore crane bearing, etc.), construction machinery (excavators, loaders, etc.), transport machinery, materials processing machinery, metallurgical machinery, food processing machinery, and military equipment (tanks, anti-aircraft artillery, radar, rocket launchers, etc.), medical equipment, scientific equipment. Slewing bearings and plain bearings, like all the rolling elements and rolling ring with raceways. However, it is compared with the ordinary rolling bearing, there are many differences, and they are the following:
1. slewing ring size is large, its diameter is typically 0.4 to 10 meters, some as high as 40 meters.
2. slewing bearings are generally required to bear the load of several aspects, not only to withstand axial and radial load, but also bear a large tipping torque. Therefore, often acts as a rotary bearing sets ordinary rolling bearings.
3. slewing ring operating speed is very low, usually in the 10 r / min or less. Moreover, in most cases, slewing ring without continuous rotation, but only within a certain angle and from the rotation, the equivalent of the so-called "swing bearing."
4. In the manufacturing process, materials and heat treatment, etc., slewing ring and rolling bearings are very different.
5. Generally, the sealing device with slewing ring on the ring gear rotational drive and dust with.
6. slewing ring size is large, so unlike ordinary bearing sleeve and mandrel mounted on the bearing housing, instead of using screws to fasten the upper and lower bearings.