Composite Stabilizing Bushing for Rotating Shaft Radial Displacement

Solution Overview

Problem

Rotating elements in machinery, such as shafts, experience excessive radial movements and lateral displacement during rotation, leading to wear and breakdown of bearings and mechanical seals due to inadequate stabilization.

Innovation Solution

A stabilizing bushing constructed from a structural composite of reinforcing fibers in a synthetic polymeric matrix is inserted between the rotating member and the surrounding structure, featuring an annular body with circumferential grooves to reduce fluid pressure and prevent radial displacement, and is designed for easy integration into existing machinery.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional stabilization methods are used, then radial movements are not adequately controlled, but adding complex stabilization mechanisms increases device complexity and cost

Engineering Contradiction:

Improvestabilization of rotating memberVSAvoidcomplexity of stabilization mechanism

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The bushing is constructed from composite materials combining reinforcing fibers (such as glass, carbon, or aramid) embedded in a polymeric matrix material. This composite structure provides enhanced mechanical strength, stiffness, and wear resistance, enabling the bushing to effectively control radial movements and stabilize rotating members without requiring additional complex stabilization components.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The bushing incorporates circumferential grooves at specific locations to locally reduce fluid pressure where needed. This localized modification of the bushing structure allows for pressure management at critical interfaces while maintaining the overall structural integrity and stabilization function of the entire bushing component.

Inventive Principle:

Principle #3Local quality

2Reliability

If fluid pressure is not managed, then sealing integrity deteriorates and bearings wear prematurely, but adding pressure management systems increases device complexity

Engineering Contradiction:

Improvesealing integrity and bearing lifeVSAvoidcomplexity of pressure management system

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The bushing incorporates circumferential grooves at specific locations to locally reduce fluid pressure where needed. This localized modification of the bushing structure allows for pressure management at critical interfaces while maintaining the overall structural integrity and stabilization function of the entire bushing component.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The polymeric matrix material provides inherent porous characteristics that allow for fluid pressure distribution and management. The material structure enables controlled fluid flow and pressure equalization between different regions, maintaining sealing integrity and reducing pressure-related wear on bearings and mechanical seals.

Inventive Principle:

Principle #31Porous materials

3Reliability

If bushings are designed for high performance, then manufacturing cost increases, but low-performance bushings lead to frequent breakdowns and higher maintenance costs

Engineering Contradiction:

Improveservice life of bushingVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The bushing is constructed from composite materials combining reinforcing fibers (such as glass, carbon, or aramid) embedded in a polymeric matrix material. This composite structure provides enhanced mechanical strength, stiffness, and wear resistance, enabling the bushing to effectively control radial movements and stabilize rotating members without requiring additional complex stabilization components.

Inventive Principle:

Principle #40Composite materials

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 reduces radial movements and vibrations, extends the service life of bearings, and maintains sealing integrity by balancing fluid pressures, providing a cost-effective solution for stabilizing rotating components.

Implementation Method 1

a plurality of circumferential grooves spaced apart axially along the inner perimeter and extending radially outwardly into the annular body for effecting a reduction in fluid pressure between the exposed one of the opposite ends of the stabilizing bushing and the opposite one of the ends

Methodology Applied

Scientific EffectFluid pressure reduction: Pressure Drop

Implementation Method 2

an annular body constructed of a structural composite including a plurality of layers of reinforcing fibers in a matrix of synthetic polymeric material, the layers extending transverse to an axial direction

Methodology Applied

Scientific EffectMechanical reinforcement: Composite Materials

Data Source

PatentUS10731645B1Stabilizing bushing constructed of fiber reinforced structural composite

Publication Date: 2020.08.04 KOZEL JOHN A

AI summary

A stabilizing bushing is constructed of a structural composite including layers of reinforcing fibers in a matrix of synthetic polymeric material, and is inserted between a rotating shaft and a surrounding housing to stabilize the shaft against unwanted radial displacement while rotating within the housing. A plurality of circumferential grooves in the bushing effect a reduction in fluid pressure between one end of the bushing exposed to higher fluid pressures than to which the opposite end of the bushing is exposed. The bushing is constructed in the form of circumferential segments selectively joined together at Z-shaped joints for facilitating the insertion and establishment of a securely integrated stabilizing bushing in position around the shaft.