Product Description

Characteristics of  Spherical Steel Bearings-QZ

The spherical bearing QZ has the following advantages:

1)The bearing transfers force through the spherical surface, so no contraction of force will accur,and the reacting force on concrete is relatively even.

2)The bearing rotates through the sliding of the spherical PTFE plate,with less turning moment,which is only related to the radius of the spherical surface and friction coefficient of the PTFE plate,not subject to the turning angle of the bearing,so it is especially suitable for large turning angles.The design turning angle may be 0.*5rad or more.

3)The turning of the bearing is consistent in all directions so it is suitable for wide and curve bridges.

4)No rubber is used in the bearing so there is no problem of rubber aging affecting the bearing rotation,and it is especially suitable for cild areas.

Technical Industries of Spherical Steel Bearing-QZ

1)The reacting force(vertical bearing capacity)is af *6 grades:***0,***0,***0,***0,***0,***0,***0,***0,***0,***0,***0,****0,****0,****0,****0,****0KN.

2)Design turning angle :0.*1,0.**5and 0.*2rad.

3)Design displacement:

Along the bridge:********0KN,e=±*0,±**0mm;*********0KN,e=±*0,±**0,±**0mm.

Across the bridge:free sliding bearings are used,e=±*0mm.

The design displacement may be varied according to the requirements of works.

4)When the PTFE plate is lubricated within silicon grease,and under the stress of *0Mpa or so,the design friction coefficient is as follows:normal temperature(**5℃-＋*0℃):0.*3;lower temperature(**0℃-＋*0℃):0.*5

5)Horizontal bearing capacity:

For sliding guided bearings,the capacity across the bridge is *0% of the reaction force of the bearing;for fixed bearing,the capacity is also *0%.

Classification and Codes for Bearing Types Examples

The bearing is classified as three types:sliding guided type(ZX),free sliding bearing(DX)and fixed type(GD).e.g.“QZ**0ZX”denotes the sliding guided spherical bearing,with the vertical design load of ***0KN.