Tilting Pad Bearing Support Layout for Uniform Bidirectional Load
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Solution Overview
Problem
In existing bearing devices for rotating machines, the uneven distribution of loads across sliding pads can lead to seizure issues due to varying distances from the collar, especially when the pivot moves, causing non-uniform load application and instability during rotation in both forward and backward directions.
Innovation Solution
A bearing device with a base plate, sliding pads, and support members where the load supporting point is shifted in the circumferential direction without changing the setting distance, using roller members and a recessed part on the base plate to maintain a stable oil film and uniform load distribution, allowing rotation in both directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a pivot is disposed on the backside of the sliding pad to accommodate rotation in both directions, then the bearing device can rotate in forward and backward directions, but the height of the sliding pad changes causing non-uniform load distribution and possible seizure
Solution Approach 1:
The sliding pad is designed to be movable relative to the base plate in the circumferential direction, allowing dynamic adjustment of the load supporting point position while maintaining a constant setting distance. This dynamic configuration enables the bearing device to accommodate rotation in both forward and backward directions while keeping the sliding pad height unchanged, thus ensuring uniform load distribution and preventing seizure.
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
The solution ensures uniform load application and stable oil film formation between the sliding pads and the rotating shaft member, preventing seizure and accommodating rotation in both forward and backward directions effectively.
Implementation Method 1
The support member is located between the base plate and the sliding pad, and shifts a position of a load supporting point in a circumferential direction of the base plate
Implementation Method 2
the sliding pad creates an appropriate inclination in response to the rotating direction and a stable oil film of lubricating oil is formed between the sliding pad and the rotating shaft member as an opposite member
Data Source
AI summary
A bearing device includes a base plate, a plurality of sliding pads and support members. The sliding pad is movable relative to the base plate. The support members are located between the base plate and the sliding pad, and shift a position of a load supporting point in a circumferential direction of the base plate, the load supporting point serving as a point for supporting a load received from the sliding pad. When any virtual flat surface perpendicular to a rotating shaft member is considered as a reference surface, and when a distance from the reference surface through the load supporting point to an end of the sliding pad at the opposite side to the base plate is defined as a setting distance, a position of the load supporting point is shifted in a circumferential direction of the base plate with no change in the setting distance.