Tilting Pad Bearing Elevation Recess Anti-Slip Design
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Solution Overview
Problem
Conventional tilting pad bearings face challenges in design complexity, material weakening, and increased maintenance due to the need for anti-slip devices that compromise strength and performance as the tilt angle changes, affecting bearing performance.
Innovation Solution
A tilting pad bearing design featuring a hollow-cylindrical recess with a circular base and a rotationally symmetrical elevation with a radially protruding bead, allowing for reduced material weakening and increased contact area shifting outward, enabling tilting in multiple directions with reduced wear and simplified production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mandrel or elevation protrudes radially inwards from the inner wall of the housing to prevent tilting segment rotation, then anti-slip protection is achieved, but the tilting segment strength is reduced due to material weakening from the recess
Solution Approach 1:
Instead of having the anti-slip device protrude radially inwards from the housing wall into the tilting segment (which weakens the segment), the invention inverts the approach by having the elevation protrude radially outwards from the tilting segment into the housing recess. This reversal of the protrusion direction eliminates the material weakening while maintaining the anti-slip function through the engagement between the elevation and recess.
Solution Approach 2:
The invention extracts the problematic radial inward protrusion from the housing design and relocates it to the tilting segment as an outward protrusion. By taking out the anti-slip function from the housing structure and implementing it on the tilting segment itself, the design eliminates the need for weakening the housing wall while preserving the anti-slip protection mechanism.
2Adaptability or versatility
If the contact length and shape change as the tilt angle increases, then the segment can tilt relative to the housing, but bearing performance is adversely affected
Solution Approach 1:
The invention applies spherical curvature to both the contact surface of the elevation and the base of the recess. This spherical geometry ensures that as the tilting segment rotates, the contact point moves along the spherical surfaces while maintaining a consistent contact length and shape. The curved surfaces allow for smooth tilting motion in multiple directions without changing the contact characteristics, thereby maintaining bearing performance across the full range of tilt angles.
3Reliability
If conventional anti-twist devices are implemented, then slipping and twisting are prevented, but design effort and complexity increase
Solution Approach 1:
The invention merges the anti-twist protection function with the existing structural components of the tilting pad bearing. The elevation on the tilting segment and the recess in the housing, which are necessary for the basic tilting mechanism, are designed to simultaneously provide anti-twist protection through their engagement. This integration eliminates the need for separate anti-twist devices, thereby reducing design complexity while maintaining reliable anti-slipping and anti-twisting protection.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design ensures safe, backlash-reduced mounting without restricting movement, reducing wear and production costs while maintaining optimal shaft support across varying tilt angles.
Implementation Method 1
They are usually lubricated with oil, which forms a lubricating film that is located in the lubricating gap between the bearing surface of each of the tilting pads and the shaft to be supported. Depending on the rotational speed of the shaft to be mounted, the shaft floats on this film of oil
Implementation Method 2
The shaft exerts a torque via a lubricating film pressure on the segment in the direction of rotation
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 3a~3b
AI summary
The invention relates to a tilting pad bearing (1) for mounting a shaft, which bearing comprises a housing (10) with an inner side (8) and a housing longitudinal axis (L) and at least one tilting pad (2) with a rear side (6) which faces the inner side (8) of the housing (10), wherein an elevation (22) arranged on the rear side (6) of the at least one tilting pad (2) is arranged in a depression (12), which is arranged in the inner side (8) of the housing (10), in such a way that a first contact face (26) present on the elevation (22) bears against a second contact face (20) on a bottom of the depression (22).