Lower Half Inner Casing Deformation Adjustment via Radial Protrusion
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Solution Overview
Problem
The existing deformation adjustment method for inner casings in rotary machines is cumbersome as the inner casing-side member protrudes, making it difficult to connect the upper half inner casing to the lower half inner casing during deformation adjustment.
Innovation Solution
A deformation adjustment method that involves attaching an inner casing-side member to a protrusion portion of the lower half inner casing, allowing for deformation adjustment without obstructing the contact surfaces, thereby facilitating easy connection of the upper half inner casing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the inner casing-side member is attached to the fastening bolt that protrudes from the lower contact surface, then the deformation adjustment can be performed, but it becomes extremely troublesome to connect the upper half inner casing to the lower half inner casing
Solution Approach 1:
The invention extracts the deformation adjustment function from the contact surface area by attaching the inner casing-side member to the protrusion portion that extends away from the contact surface. This separation allows the contact surfaces to remain clear for connection while the adjustment mechanism operates independently at the protrusion portion, resolving the contradiction between deformation adjustment capability and ease of connection.
2Ease of operation
If the inner casing-side member is attached to the protrusion portion, then the upper half inner casing can be easily connected, but the attachment structure becomes more complex
Solution Approach 1:
The protrusion portion is pre-formed on the inner casing body before the deformation adjustment operation. This preliminary structural feature provides a ready-made attachment point for the inner casing-side member, eliminating the need for complex real-time modifications during assembly and reducing overall manufacturing complexity while maintaining ease of connection.
3Manufacturing precision
If the deformation adjustment device is used with the inner casing-side member on the contact surface, then deformation can be adjusted, but the connection process becomes troublesome
Solution Approach 1:
The invention moves the deformation adjustment mechanism from the two-dimensional contact surface plane to a three-dimensional position at the protrusion portion that extends radially outward. This spatial relocation allows the adjustment mechanism to operate in a different dimensional space, preserving deformation precision while eliminating interference with the connection process at the contact surfaces.
Data Source
AI summary
A lower half inner casing has a lower half inner casing body forming a semi-circular arc, and an inner casing accessory part provided to the lower half inner casing body. The inner casing accessory part has a protrusion which protrudes radially outward of the lower half inner casing body, and protrudes upward of a lower contact surface of the lower half inner casing body. In the deformation adjustment method, the following are executed: a preparation step for preparing a deformation adjustment device having an inner casing-side member that is attachable to the protrusion so as to be non-relatively movable in the radial direction; a device arrangement step for attaching the inner casing-side member to the protrusion and arranging the deformation adjustment device around the protrusion; and a deformation adjustment step for pressing, to the radial inward side, the inner casing-side member attached to the protrusion.