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Thrust Roller Bearing 29324

产品分类 :

服飾及紡織->配件->包包配件

产品规格

Model No: 29324

Country	CN
Brand	NXZ
Packing	Standard Export Package
Payment Term	L/C,T/T

产品描述

Thrust roller
bearings


 


Thrust roller bearings includes self-aligning
thrust roller bearings, tapered roller thrust bearings, cylindrical roller
thrust bearings and needle roller thrust bearings.


Structures:


1. 29000 type thrust self-aligning roller bearings, this
type of bearings can carry both axial and radial load in which mainly is axial
load. And it has low friction coefficient and fine self-aligning property. The roller
of this bearing is unsymmetrical spherical roller, which can reduce relatively
slip between roller and raceway in the operating. Also the long roller has big
diameter and much quantity, so the load capacity is high. Generally it adopts
oil lubrication, but under low speed circs will be grease lubrication.


NXZ mainly
produce the following structures:


2.80000 type thrust cylindrical
roller bearings and 90000 type thrust tapered roller bearings, this type can
accommodate single-direction axial load, they have much higher axial
carrying-capacity than thrust ball bearings; in additional, they have high
rigidity and take up smaller space.. The thrust cylindrical roller bearings are
applied in operation with low rotation speed; the rotation speed of thrust tapered
roller bearings is a little higher than thrust cylindrical roller bearings.


3.350000 type double-directions thrust tapered roller bearings (SKF
code), this type can accommodate larger double-direction axial load.


4.
TTSV and TTSX type thrust full tapered roller bearings used on pressing-down
device of mill, this type is full complement roller, can accommodate larger
single-direction axial load.


Cage
materials


Brass, brozen or steel solid cages are
adopted.


Permissible
tilt angle


The bearing
axis of thrust tapered roller bearings and thrust cylindrical roller bearings
are not permitted to be inclined. The bearing axis of thrust self-aligning
roller bearing is permitted to be inclined, when the equivalent static load P0a≤0.05C0a,
and when the shaft washer is slewing, the permissible tilt angle is: 


Bearing
series   Permissible tilt angle


292
series        1.5°


293
series          2°


294
series        2.5°


The
permissible tilt angle will decrease with the increase of the load.


Minimum
axial load


When the bearings are slewing, as the rolling
bodies are acted by centrifugal moment, the rolling bodies will slid with
reference to the raceway, which will cause the shaft washer and housing washer
to be separated. In order to ensure the normal operation of the bearings,
certain axial load must be put on the bearing. The minimum axial load required
is:  


Thrust tapered roller bearings and thrust
cylindrical roller bearings


C0a/1000≤Famin>A(n/1000)2


Thrust self-aligning roller bearings


C0a/1000≤Famin>1.8Fr+A(n/1000)2


In
the equation: Famin   Minimum
axial load (kN)


             Fr        Radial load (kN)


             C0a   
Basic static load rating (see bearing dimension table) (kN)


             A     Minimum load constant (see bearing
dimension table)


             n      Rotational speed (r/min)


When the actual load acted on a bearing is
less than the minimum axial load computed, a spring or other measures must be
used to preload the bearing.


Dynamic
equivalent axial load


Pa=Fa        (Thrust tapered roller bearings and
thrust cylindrical roller bearings)


When Fr≤0.55Fa      Pa=Fa+1.2Fr    (Thrust self-aligning roller bearings)


Static
equivalent axial load


        P0a=Fa         (Thrust tapered roller bearings and thrust
cylindrical roller bearings)


When Fr≤0.55Fa   P0a=Fa+2.7Fr   (Thrust
self-aligning roller bearings)
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