Centrifugal Fluid Machine Partition Wall Deformation Control
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Solution Overview
Problem
The uniaxial multistage centrifugal fluid machine experiences a decrease in efficiency due to deformation of the high pressure-side discharge passage caused by the partition wall deforming from high pressure to low pressure, which expands the passage area and reduces work efficiency.
Innovation Solution
Incorporating a passage deformation suppression member biased by a biasing means, such as compressed fluid, to maintain the high pressure-side discharge passage area, and utilizing a return passage to reflux compressed fluid and a seal member to prevent flow back into the impeller, thereby suppressing deformation and maintaining efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the partition wall is used to separate low pressure and high pressure fluid operation units, then the machine structure is simplified and compact, but the partition wall deforms from high pressure toward low pressure causing the high pressure-side discharge passage to expand and reduce work efficiency
Solution Approach 1:
The passage deformation suppression member is positioned in advance between the partition wall and the high pressure-side discharge passage to counteract the deformation effect before it occurs. When the partition wall deforms under pressure differential, the suppression member provides preliminary resistance to prevent the discharge passage from expanding, thereby maintaining work efficiency while preserving the compact machine structure.
Solution Approach 2:
The passage deformation suppression member acts as an intermediary element between the partition wall and the high pressure-side discharge passage. It mediates the interaction by absorbing or counteracting the deformation forces transmitted from the partition wall, preventing direct transmission of deformation to the discharge passage and maintaining its dimensional stability.
2Productivity
If a passage deformation suppression member is added to suppress deformation of the high pressure-side discharge passage, then work efficiency is maintained, but the device complexity increases
Solution Approach 1:
The passage deformation suppression member is designed to function automatically based on the pressure differential across the partition wall. When high pressure acts on the partition wall causing deformation, the suppression member is naturally activated by this same pressure to counteract the deformation. This self-service mechanism maintains work efficiency without requiring external control systems or additional complex actuation mechanisms.
3Productivity
If the high pressure-side discharge passage area is maintained constant, then work efficiency is preserved, but the passage structure becomes more rigid and difficult to manufacture
Solution Approach 1:
The passage deformation suppression system is segmented into distinct functional components: the partition wall for pressure separation, the passage deformation suppression member for dimensional control, and the high pressure-side discharge passage for fluid transport. This segmentation allows each component to be optimized independently - the passage can be manufactured with standard tolerances while the suppression member compensates for deformations, simplifying overall manufacturing.
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 effectively suppresses the expansion of the high pressure-side discharge passage, maintaining efficiency by utilizing the compressed fluid's pressure to bias the passage deformation suppression member and ensuring the compressed fluid is reused, thus preventing a decrease in efficiency.
Implementation Method 1
a passage deformation suppression member provided between the wall body and the high pressure-side discharge passage to suppress deformation of the high pressure-side discharge passage; and a biasing means provided between the wall body and the passage deformation suppression member and configured to bias the passage deformation suppression member toward the high pressure-side discharge passage
Implementation Method 2
utilizing the compressed fluid's pressure to bias the passage deformation suppression member
Data Source
AI summary
A centrifugal fluid machine includes a rotor, a low pressure compression unit provided on one side in the axial direction of the rotor, a high pressure compression unit provided on the other side in the axial direction of the rotor, a partition wall 13 that separates the low and high pressure compression units, and a high pressure-side discharge passage 54 formed on the side of the high pressure compression unit of the partition wall 13, extending in the radial direction of the rotor, and provided along the partition wall 13, wherein the partition wall 13 has a wall body 71, a passage deformation suppression member 72 that is provided between the wall body 71 and the high pressure-side discharge passage 54 and can deform the high pressure-side discharge passage 54, and an biasing mechanism 73 that is provided between the wall body 71 and the passage deformation suppression member 72.