Centrifugal Compressor Partition Oil Supply Design
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Solution Overview
Problem
Centrifugal compressors face a shortage of oil supply to roller bearings, which can lead to lubrication issues and increased wear, affecting the efficiency and longevity of the compressor.
Innovation Solution
The design includes a housing with a ring member, high-speed shaft, rollers, a partition with an insertion hole and seal, and an oil supply passage that ensures continuous communication between the insertion hole and bearing receptacles, allowing for effective lubrication of roller bearings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rollers cover the axial end surfaces of the roller bearings, then the rollers may block the supply of oil to the roller bearings, but this configuration is necessary for the speed increasing mechanism's structure
Solution Approach 1:
The partition is divided into multiple sections: a first partition section with bearing receptacles for roller bearings, and a second partition section with an insertion hole for the high-speed shaft. This segmentation allows independent optimization of oil supply paths for different components, enabling oil to reach roller bearings through the first partition section while the high-speed shaft passes through the second partition section without blocking oil flow.
Solution Approach 2:
The first partition section acts as an intermediary structure that facilitates oil flow from the oil supply passage to the bearing receptacles. By positioning the bearing receptacles in the first partition section and providing a dedicated oil supply path, the system ensures that oil can reach the roller bearings without being blocked by the rollers or the high-speed shaft.
2Reliability
If the high-speed shaft is inserted through the partition, then the seal must be positioned to seal the boundary, but this may complicate the oil supply path to bearing receptacles
Solution Approach 1:
The partition is segmented into a first partition section containing bearing receptacles and a second partition section containing the insertion hole. This segmentation separates the oil supply function from the shaft insertion function, allowing the seal to be positioned in the second partition section without interfering with the oil supply path in the first partition section.
Solution Approach 2:
The oil supply path is routed through the first partition section in a direction that bypasses the seal location in the second partition section. By utilizing the spatial dimension created by partitioning, the system ensures that the seal does not block the oil supply to the bearing receptacles.
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 configuration ensures a consistent oil supply to the roller bearings, reducing the risk of lubrication shortages, heat production, and wear, thereby enhancing the compressor's efficiency and reducing the risk of mechanical failure.
Implementation Method 1
The partition includes a communication passage that allows communication between a portion of the insertion hole located closer to the speed increaser chamber than the seal and the bearing receptacles
Data Source
AI summary
A centrifugal compressor includes a housing, a partition separating an empty space in a housing into a speed increaser chamber and an impeller chamber, an insertion hole provided in the partition to allow insertion of a high-speed shaft, a seal located in the insertion hole to seal a boundary between the partition and the high-speed shaft, and a bearing receptacle located in the partition. The partition includes a communication passage that allows communication between a portion of the insertion hole located closer to the speed increaser chamber than the seal and the bearing receptacle.