Dalian Deep Blue liquid sulfur pump bearing assembly

The 73 series belongs to angular contact bearings, primarily designed to bear axial loads, and requires back-to-back installation

Vertical suspended pumps are generally installed face to face (vertical cantilever pumps are installed back to back), while cantilever pumps and pumps with support at both ends are usually installed back to back

Back-to-back installation is a common mounting configuration for angular contact bearings in centrifugal pumps, and it helps to increase the stiffness of the shaft

It’s not necessarily the case; it is still necessary to determine which installation method to use by taking into account the depth of the gland, as well as the dimensions of the bearing housing and the thickness of the bearing； Generally, oil grooves are designed in the middle of the bearing seats of bearings installed face to face ； Moreover, when installing them face to face, a washer is usually placed between the two angular contact ball bearings.

Not necessarily; it can also be used alone

Why are the vertical and cantilever installation methods different?

The bearing points of the back-to-back mounted shafts are located outside the bearings, which improves the stiffness of the shaft. Vertical pumps mostly have flexible rotors

This depends on the situation and the direction of thermal expansion. 1. Normal installation (face-to-face configuration): The narrow end faces of the outer rings of the two bearings face each other. This method has a simple structure and is easy to install, disassemble, and adjust. However, when the shaft expands due to heat, the bearing clearance decreases; therefore, attention should be paid to adjusting the axial clearance to prevent jamming. Suitable for transmission components between two bearings. Positive mounting is commonly used in ordinary machines. 2. Reverse installation (back-to-back configuration): The narrow end faces of the outer rings of the two bearings face away from each other. This method provides good shaft system stiffness, but the structure is complex, making installation, removal, and adjustment inconvenient. When the shaft expands due to heat, the clearance of the bearings increases. Suitable for applications where the transmission components are located at the outer end.

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