Split Bearing Protector for Water Ingress and Easy Retrofit
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Solution Overview
Problem
Existing bearing protectors for air moving fans in cooling towers are difficult to install and replace, and they inadequately protect against water condensation and corrosion, especially when used outdoors, as they are not universally compatible with various bearing types and often fail to prevent water infiltration.
Innovation Solution
A flexible, radially shaped bearing protector with a non-continuous annular housing that can be opened to fit around the shaft without removing it, featuring a cavity for grease that displaces water and contaminants, and can be securely fastened using various methods, compatible with multiple bearing brands and types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If prior art bearing protectors are used, then water infiltration is reduced, but installation and replacement are difficult and bearing protection is inadequate
Solution Approach 1:
The bearing protector is divided into a housing portion and a seal portion that can be separately installed. The housing fits over the bearing outer race while the seal portion interfaces with the bearing seal, allowing independent installation of each component for easier maintenance and replacement
Solution Approach 2:
The invention extracts the seal function from the housing structure by adding a separate seal portion that can be independently replaced. This allows the sealing capability to be updated or replaced without replacing the entire bearing protector assembly
2Adaptability or versatility
If prior art bearing protectors are designed for specific bearing types, then compatibility is limited, but installation complexity increases
Solution Approach 1:
The bearing protector housing is designed with a standardized configuration that can accommodate multiple bearing types and sizes. The housing portion fits over the bearing outer race in a universal manner, while the seal portion can be adjusted or selected to match different bearing seal configurations, enabling one housing design to serve multiple bearing types
3Object-affected harmful factors
If a close-fitting grease seal is installed around the shaft, then water and contaminant protection is improved, but installation requires shaft removal
Solution Approach 1:
The bearing protector housing is nested over the bearing assembly from the outer race side, allowing installation without shaft removal. The housing portion fits over the bearing outer race while the seal portion reaches inward to interface with the bearing seal, creating a nested protective structure that can be installed from the accessible bearing outer diameter side
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 prevents water and contaminant ingress, reducing the risk of lubrication failure and corrosion by creating a close-tolerance, grease-filled secondary seal that is easy to install and maintain, ensuring prolonged bearing life and compatibility with multiple bearing brands.
Implementation Method 1
This cavity is filled with grease expelled from the primary bearing seal and displaces water and/or contaminants that would normally be in contact with the primary bearing seal
Implementation Method 2
The annular housing is sufficiently flexible so that its annular shape can be opened, for example by spreading or twisting, separating the first and second ends
Implementation Method 3
providing a close-fitting through-shaft secondary protective grease seal... creates a space between the bearing assembly and the bearing protector which space may be filled with protective grease
Data Source
AI summary
A split bearing protector with a flexible design that adds improved moisture protection to a bearing and can be installed without removing the bearing from the machine in which it is installed.