Rules for bearing housing equipment in construction of electric power boiler units

Rules for Bearing Housing Equipment in the Construction of Electric Power Boiler Units

Source: China Bearing Network | Time: 2013-01-02

Bearing housing equipment plays a crucial role in the construction and operation of electric power boiler units. Proper installation and maintenance of these components ensure smooth performance, reduce mechanical failure risks, and extend the lifespan of the machinery. Below are key guidelines to follow when installing and maintaining bearing housing equipment:

  1. The bearing housing should be free from cracks, sand holes, and other defects. The surface should be clean with no residual molding sand or sharp edges.
  2. All cooling water pipes within the bearing housing's cooling or oil chamber must undergo a hydrostatic pressure test before installation. The test pressure should be 1.25 times the maximum operating pressure of the cooling water system.
  3. The adjustment seat and base plate of the bearing housing should not have more than three gaskets (excluding insulating ones). The gasket area must be at least as large as the bearing contact surface.
  4. The radial clearance between the shaft and the shaft seal ring must meet the specifications outlined in the equipment manual. For sliding bearings, the typical clearance ranges from 1.5 to 2.0 mm, while for rolling bearings, it is usually between 0.3 to 0.6 mm. The sealing packing should be tightly packed into the groove, ensuring even contact and proper tightness.
  5. When using grease for rolling bearings, the amount should not exceed two-thirds of the bearing chamber volume for low-speed machines. For machines operating above 1500 RPM, the grease should not exceed half the chamber volume.
  6. The oil level gauge must be durable and leak-proof. Its upper end should be connected to the atmosphere, and the breather of the sealed oil chamber should be kept clean. For rolling bearings, the bottom roller should be immersed in oil by approximately 1/3 to 1/2 of its diameter.
  7. The oil ring should be perfectly round, with uniform thickness and a lubricated surface. The joint should be strong and free from gaps. The oil ring should be immersed in oil up to about 1/4 of its height.

For more information on bearing technology, check out related articles such as "Adjustment of Bearing Axial Clearance," "Analysis of Bearings Used in Coal Mines," and "Features of Cylindrical Roller Bearings." These resources provide valuable insights into bearing selection, maintenance, and application in industrial environments.

This article was originally published on China Bearing Network. For more details, visit China Bearing Network.

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