Flexible Solid Plate for Stuffing Box Shaft Misalignment
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Solution Overview
Problem
Conventional stuffing boxes face challenges with leakage due to misalignment and axial/radial movements of the shaft, requiring precise installation and frequent maintenance to prevent leakage.
Innovation Solution
A solid plate made of flexible material with a hole for receiving a rotating shaft and at least one cavity, placed at the end of the stuffing box to absorb axial and radial movements, thereby reducing leakage and maintaining proper alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional stuffing box is used without a solid plate, then the structure is simpler, but axial and radial movements of the shaft cause misalignment and leakage
Solution Approach 1:
The solid plate acts as an intermediary element between the stuffing box and the shaft, absorbing axial and radial movements to maintain proper alignment and prevent leakage. This mediator component isolates the harmful movements from the sealing interface.
Solution Approach 2:
The solid plate is made of flexible material that can deform to accommodate shaft movements, changing its physical state from rigid to flexible to absorb the movements while maintaining the seal integrity.
2Reliability
If precise alignment is required during installation to prevent leakage, then leakage can be prevented initially, but installation becomes more difficult and time-consuming
Solution Approach 1:
The solid plate with its flexible material and cavity structure automatically adjusts to shaft movements during operation, providing self-alignment and compensating for installation variations without requiring precise manual alignment.
Solution Approach 2:
The solid plate is pre-installed in the stuffing box to provide a cushioning layer that absorbs future shaft movements, preventing misalignment issues before they occur during operation.
3Stability of the object's composition
If the stuffing box uses rigid components only, then the structure is more stable, but it cannot absorb shaft movements leading to increased leakage
Solution Approach 1:
The solid plate is made of flexible material that combines the stability needed for structural support with the flexibility required to absorb shaft movements, creating a composite solution that achieves both stability and movement absorption.
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 solid plate effectively absorbs axial and radial movements, minimizing leakage and extending the wear life of the stuffing box, while also simplifying installation and reducing maintenance needs.
Implementation Method 1
A solid plate made of flexible material with a hole for receiving a rotating shaft and at least one cavity, placed at the end of the stuffing box to absorb axial and radial movements
Data Source
AI summary
The present invention relates to a stuffing box assembly comprising a stuffing box and a solid plate, the solid plate may be placed at the shaft introducing end of the stuffing box, between the stuffing box and a surface, when the stuffing box assembly is mounted on to the surface, the solid plate may be on a first side provided with a pressure plate flange and on a second side be provided with a counter pressure plate flange, wherein the pressure plate flange and/or the counter pressure plate flange is provided with one or more locking projections pointing towards the solid plate.