Rotary Machine Positioning Device Pin Groove Interlock
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Solution Overview
Problem
The existing positioning devices for rotary machines, such as steam turbines, require a large number of components, including radial pins, liners, and bolts, which complicates the alignment and positioning of inner members relative to outer members.
Innovation Solution
A positioning device that reduces the number of components by using a pin and a groove contact member with a position restriction concave portion and a claw portion, where the pin and groove contact member are designed to interlock, eliminating the need for additional fixing elements like bolts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a positioning device uses multiple components (radial pin, liner, bolt) to fix the groove contact member, then the positioning reliability is improved, but the device complexity and number of components increase
Solution Approach 1:
The patent combines the radial pin and groove contact member into a single integrated component. The groove contact member directly contacts the groove side surface and includes a position restriction concave portion that engages with a claw portion of the pin, eliminating the need for separate liner and bolt components while maintaining positioning reliability through the interlocking engagement mechanism
Solution Approach 2:
The position restriction concave portion and claw portion form a self-locking mechanism where the claw portion enters the concave portion through plastic deformation, automatically restricting relative movement between components without requiring additional fixing elements like bolts or screws
2Stability of the object's composition
If a positioning device uses multiple components (radial pin, liner, bolt) to ensure stable positioning, then the positioning stability is improved, but the ease of manufacture deteriorates
Solution Approach 1:
The patent merges multiple components into a single groove contact member that integrates the functions of the radial pin, liner, and positioning element. This reduces the number of parts to be manufactured, assembled, and inspected, thereby improving ease of manufacture while maintaining positioning stability through the integrated position restriction mechanism
Solution Approach 2:
The patent extracts and eliminates unnecessary components (liner and bolt) from the positioning device, retaining only the essential groove contact member with integrated position restriction features. This simplification reduces manufacturing complexity while the position restriction concave portion and claw portion ensure stable positioning
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 effectively restricts relative movement between the pin and groove contact member, allowing for precise alignment without the need for additional fixing components, thereby simplifying the positioning process and reducing the overall component count.
Implementation Method 1
a claw portion that enters the position restriction concave portion and comes in contact with the position restriction concave portion is formed in the other member as a portion of the other member is plastically deformed
Data Source
AI summary
A pin insertion hole is formed in an outer member, and a pin groove is formed in an inner member. A positioning device includes a pin entering the pin insertion hole and the pin groove, and a groove contact member coming in contact with a groove side surface of the pin groove. In one member of the pin and the groove contact member, a position restriction concave portion recessed in a direction away from the other member is formed in a portion facing the other member. In the other member, a claw portion entering the position restriction concave portion and coming into contact with the position restriction concave portion is formed as a portion of the other member is plastically deformed.