Eccentric Pin Position Adjustment Device for Rotating Machines
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Solution Overview
Problem
Existing rotating machine designs require an increase in the outer diameter of the cylindrical casing to accommodate tools for adjusting the position of the lower-half vane ring, leading to a larger size of the outside cylinder.
Innovation Solution
A position adjustment device using an eccentric pin with a rotating shaft and an eccentric shaft part, along with a push rod, allows for vertical adjustment of the lower-half inside member relative to the outside member without the need for external tool engagement, thereby maintaining the original size of the outside cylinder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a support fitting with a projecting section is used to adjust the position of the lower-half vane ring, then the position adjustment function is achieved, but the outer diameter of the casing must be increased to accommodate the adjusting tool
Solution Approach 1:
The adjusting tool is nested within the inner peripheral side of the casing, specifically utilizing the space between the rotor shaft and the vane ring. The tool's operating portion is positioned inside the casing rather than outside, eliminating the need to increase the casing outer diameter while still allowing position adjustment of the lower-half vane ring.
Solution Approach 2:
The adjusting tool is oriented radially, extending from the rotor shaft toward the vane ring, rather than extending axially or externally. This radial orientation allows the tool to access and operate on the vane ring from within the casing's radial space, avoiding the need to increase the overall outer diameter.
2Ease of manufacture
If the dimension of the notch is increased to install the adjusting tool, then the tool can be installed, but the size of the outside cylinder increases
Solution Approach 1:
The adjusting tool is nested within the existing radial space of the casing, utilizing the annular region between the rotor shaft and the vane ring. This eliminates the need to enlarge the notch or increase the overall cylinder volume, as the tool fits within the existing structural envelope.
Solution Approach 2:
The tool is designed with a localized operating portion that engages with the vane ring at a specific radial position, allowing adjustment functionality to be concentrated in a small region rather than requiring extensive modifications to the overall casing structure or notch dimensions.
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
Enables precise, accurate, and fine adjustment of the lower-half inside member's position without increasing the outside cylinder's size, reducing the need for additional operations to stop the eccentric pin's rotation and shortening the working time.
Implementation Method 1
an eccentric pin (21) that includes a rotating shaft part (22) rotatably supported at an end in a circumferential direction of the lower-half outside member, and an eccentric shaft part (23) inserted into an end in a circumferential direction of the lower-half inside member, the eccentric shaft part rotating integrally with rotation of the rotating shaft part
Data Source
AI summary
A position adjustment device is provided with an eccentric pin and a push rod. The eccentric pin has a rotating shaft part, and an eccentric shaft part inserted into an end in a circumferential direction of a lower-half inside member. The push rod is inserted into the lower-half inside member from an end surface in the circumferential direction of the lower-half inside member, the push rod being able to come into contact with the eccentric shaft part within the lower-half inside member. The rotating shaft part has a columnar shape with a rotational axis line. The eccentric shaft part is formed with: a side peripheral surface that comes into contact with the inner peripheral surface of an eccentric shaft hole in the lower-half inside member into which the eccentric shaft part is inserted, and a rod contact surface that comes into contact with the push rod.