Bi-directional Hydrostatic Thrust Bearing Debris Management
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Solution Overview
Problem
Rotating fluid machines face challenges in maintaining adequate lubrication of thrust bearings due to debris contamination, which can lead to improper lubrication and potential damage, especially in dirty or hazardous operations where filtered or screened fluids may not be completely debris-free.
Innovation Solution
A fluid machine system is designed with a housing and rotating portion that includes a thrust bearing with an extension dividing the bearing chamber into two pockets, allowing fluid to be communicated through metering ports and channels, ensuring consistent lubrication by adjusting fluid flow based on the extension's bias direction, thereby maintaining clean fluid delivery to the thrust bearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If filtered or screened fluids are used for lubrication, then debris contamination is reduced, but complete debris-free fluid delivery cannot be guaranteed in dirty or hazardous operations
Solution Approach 1:
The bearing chamber is divided into two separate pockets by the extension: a first pocket receiving fluid from the bearing channel and a second pocket adjacent to the extension. This segmentation allows debris to be trapped in one pocket while clean fluid is delivered to the thrust bearing from the other pocket, resolving the contradiction between maintaining reliable lubrication and preventing debris contamination.
2Ease of operation
If pumpage is used for lubrication, then lubrication is provided, but debris can get caught in thrust bearing clearances causing improper lubrication
Solution Approach 1:
The extension acts as an intermediary element within the bearing chamber, creating a physical barrier that separates the fluid delivery path from the debris-prone areas. The metering ports and channels on the extension control fluid flow to the thrust bearing while the extension itself blocks debris from entering the bearing clearances, thus maintaining proper lubrication reliability.
3Reliability
If the extension divides the bearing chamber into two pockets, then debris is prevented from reaching the thrust bearing, but the device complexity increases
Solution Approach 1:
The extension serves multiple functions simultaneously: it divides the bearing chamber into two pockets for debris separation, provides metering ports and channels for controlled fluid delivery to the thrust bearing, and acts as a physical barrier against debris. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving reliable debris 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 solution ensures continuous and effective lubrication of the thrust bearing across the operating range of the device, preventing debris accumulation and maintaining optimal performance even in dirty or hazardous environments.
Implementation Method 1
a thrust bearing that is lubricated by the pumpage
Implementation Method 2
The extension divides the bearing chamber into a first pocket separated from a second pocket
Data Source
AI summary
A fluid machine in communication with a thrust bearing fluid source includes a housing having a bearing portion receiving fluid from the fluid source. A bearing chamber is formed in the bearing portion. An extension of a rotor is positioned within the bearing chamber so that a first pocket is disposed adjacent to a first side of the extension and a second pocket is disposed adjacent to a second side of the extension. An extension lateral side is adjacent to the bearing chamber lateral side. The extension comprises a first channel extending from a first half of the extension lateral side to the first pocket. The extension comprises a second channel extending from a second half of the extension lateral side opposite the first channel to the second pocket. The bearing chamber receives fluid from the bearing channel which is communicated to the first and second channels and the pockets.