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With the development of tower buildings Cheap Kieran Trippier Jersey , the demand of elevators are in rising and

large-volume trend as they have to serve many people in short time. Tokyo Sky Tree is

the representative of these tower buildings, where set a 600mmin high speed and large

volume elevator as well as the 464.4m working elevator with longest lifting distance

in Japan, to the “Tembo Viewing Platform” and “Tembo Galleria”, which are 350m and

450m respectively away from the ground. This article introduced the rolling bearings

that used in such elevators with high security and comfort.



1. <“http:www.bearingseat”>bearing housing in elevators


The driving steel wire rope pulley of the winding machine loads the car weight, car

self weight, clump weight, wirerope self weight etc., thus it needs large load for the

tower and large volume. Therefore, winding machine should adopt bearings with features

of large loading capacity Cheap Kevin Wimmer Jersey , long service life, excellent and high speed, low noise, and

low vibration. For such requirements,
href=“http:www.bearingseatarticle_list_86”>carrier roller with

automatic adjusting core that can balance the bending between the shaft and shell can

be used in winding machines as they have advantages of large loading capacity and easy

installation. Generally grease lubrication is performed to such bearings and under

spot check of the rules, it should add the grease.




2. Special steel for bearings


Rolling bearing consists of rail wheel, rolling element and holder that can support

the rolling elements. Under high contact pressure, the former two parts will perform

rolling contact with the sliding. The holder is in free sliding contact with the other

one or two parts and bears the tensile strength and pressure force. Therefore,

materials of the three components need different performance.



3. Manufacturing technology of the bearings


The main factor that impacts the fatigue life of the rolling bearing from
href=“http:www.bearingseatarticle_list_86”>carrier roller

manufacturers is the non-metallic inclusion in steel Cheap Juan Foyth Jersey , which is the impurity in

steel, and if it is under the bearing rail, there will be stress concentration to its

surroundings, then cause crack, extension and crush in the end. Especially for bad

influence of hard oxides to non-metallic inclusion, it is the effective way to reduce

the oxygen content in the steel. Those steel manufactuers have done this through

development of technologies such as dissolution, refining, VD and continuous casting



4. Long service life for bearings


Elevator bearings should have high reliability so as to avoid bearing crush. As

mentioned above, we know that such crush is affected by the non-metallic inclusion in

steel Cheap Josh Onomah Jersey , thus the review and manufacture control are very important to the inclusions.

Nowadays, bearings are mainly made of high clean steel that can reduce the oxygen

content and inclusions. In addition, through eveluation technique for material

cleaniness such as the improvement of image analytic method, high reliable bearing

steel with large particle inclusions that can reduce the effect to the bearing life

has been developed.



5. Mute, low vibration, self aligning roller bearing for elevator ??
Representatives including Tokyo Sky Tree with high speed and large volume elevator

winding engine adopts self aligning roller bearing that can meet the requirements of

reducing the nose and vibration, whose special designs are:


1) Optimization of the space in the bearing


2) Improvement of the part precision


For elevator bearings with requirement of high reliability, it is very important to

select steel with high cleanliness and quality management. High speed elevators in

tower buildings day by day need attention of high security, high speed and low noise Cheap Jan Vertonghen Jersey ,

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