Spherical bridge bearings, composed of precision-machined steel plates with spherical concave and convex surfaces, provide flexible movements and rotations between the superstructure and supporting structures to transfer whether horizontal or vertical force safely.

Working principle of spherical bearing
Spherical bearing is formed by top steel plate, stainless steel slide, PTFE slide, convex plate, curved PTFE and concave plate. The sliding of convex plate and concave plate can accommodate the structural rotations of the beam end. The stainless steel slide and PTFE slide can further reduce friction coefficient, thus displacement of expansion and contraction can be accommodated. While, depending on whether the spherical bearing is fixed, guided or free sliding, the vertical loads, horizontal forces, longitudinal movements or transverse movements can be accommodated. What’s more, the guided bar and the restraining ring also can transmit the horizontal forces. Thus, spherical bearings are especially suitable for more complex bridges.

Types:

Similar to pot bearing, spherical bridge bearings are available in fixed type, guided type and free sliding types as shown in the following pictures:

Fixed spherical bridge bearing

Guided spherical bridge bearing

Free sliding spherical bridge bearing

Main technical performance

• Spherical bearing vertical loading capacity (kN): 1000, 1500, 2000, 2500, 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000, 12500, 15000, 17500, 20000.
• Design displacement of spherical bearing
  • Bridge in longitudinal direction
    1000 – 2500 kN e = ±50 mm e = ±100 mm.
    3000 – 20000 kN e = ±50 mm e = ±100 mm e = ±150 mm.
  • Bridge in transverse direction
    Free sliding spherical bearing e = ±40 mm.
    The design displacement can be customized according to the project requirements).
• Design friction coefficient of spherical bearing (in condition of PTFE layer with silicon grease lubrication and stresses about 30 MPa).
  Normal temperature type: 0.03.
  Cold resistant type: 0.05.
• Design friction coefficient of spherical bearing (in condition of PTFE layer with silicon grease lubrication and stresses about 30 MPa).
  • Normal temperature type: 0.03.
  • Cold resistant type: 0.05.
• Horizontal force spherical bearing can withstand
  • Normal temperature type: 0.03.
  • Cold resistant type: 0.05.
• Working temperature
  • Normal temperature type: -25 °C to + 60 °C.
  • Cold resistance type: -40 °C to + 60 °C.

  • BAOLI High Quality Product with CE & ISO Certifications.

     

    Fixed Type Series

    

    Sliding Guide Type Series

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    Free Sliding Type Series

    

     

    Testing Laboratory

     BAOLI company have special testing laboratory, is equipped with  numbers of professional test machines, such as 15000kN microcomputer controlled electro hydraulic servo pressure shear test machine, pendulum impact tester, microcomputer controlled electro-hydraulic servo universal testing machine, microcomputer controlled wear test machine, ensure the good quality product from raw material from finished products.

     

    

     

     

    Certifications:

    

    Workshop

     

     

    Related Products

                

    Pot Bearings                                          Spherical Bearings                                 Rubber Pad Bearings

     

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    Packaging & Shipping

    Packing Details: Wooden case with PE films and pearl cotton,or as required.

    Delivery Details: It is 5~20 days,according to the quantity of customer’s need.