Gas Vent Plug with Elastic Tubular Body for Bearing Pressure Control
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Solution Overview
Problem
Conventional gas vent plugs in bearings face challenges in maintaining working pressure within a predetermined range due to increased interference of the rubber tubular body during mounting, leading to potential detachment and increased processing costs.
Innovation Solution
A gas vent plug configuration featuring a metal annular body integrated with an elastic tubular body, which includes a vent with a circular groove or beveled portion to prevent deformation and ensure consistent working pressure, allowing for increased interference without detachment, and a collar or flange for secure mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the interference of the rubber tubular body is increased to prevent detachment of the gas vent plug, then the attachment strength is improved, but the working pressure varies beyond the predetermined range
Solution Approach 1:
The gas vent plug is segmented into a rubber tubular body and a metal annular body. The metal annular body is inserted into the rubber tubular body, creating a composite structure where the metal component provides structural stability and prevents excessive deformation of the rubber, thereby maintaining consistent working pressure while allowing sufficient interference for secure attachment.
Solution Approach 2:
The invention uses a composite structure combining rubber (elastic material) and metal. The rubber tubular body provides elasticity and sealing, while the metal annular body provides rigidity and dimensional stability. This composite design allows the rubber to be sufficiently thick for secure mounting while the metal core prevents excessive deformation that would cause working pressure variation.
2Ease of manufacture
If the tolerance of the hole fabrication is increased to reduce processing cost, then the manufacturing cost is reduced, but the interference of the rubber body for mounting becomes insufficient leading to potential detachment
Solution Approach 1:
The composite structure of rubber and metal allows the rubber tubular body to be made thicker without compromising the overall dimensional precision. The metal annular body compensates for variations in hole diameter, ensuring reliable mounting even when hole tolerance is increased, thereby reducing processing costs while maintaining attachment reliability.
Solution Approach 2:
The invention changes the parameter of rubber tube thickness to be greater than conventional designs. By increasing the rubber thickness and incorporating the metal annular body, the system can accommodate larger hole diameter variations while maintaining sufficient interference for secure mounting, thus allowing relaxed tolerance requirements and reduced manufacturing costs.
3Strength
If the thickness of the rubber tubular body is increased to accommodate lower limit hole diameter, then the attachment strength is improved, but the working pressure varies beyond the predetermined range
Solution Approach 1:
The gas vent plug is divided into rubber and metal components. The metal annular body is inserted into the rubber tubular body, creating a composite structure where the metal provides a rigid core that limits rubber deformation. This allows the rubber to be sufficiently thick for secure mounting in lower limit hole diameters while preventing excessive deformation that would cause working pressure variation.
Solution Approach 2:
The composite structure enables the use of thicker rubber material without compromising working pressure consistency. The metal annular body acts as a reinforcement that prevents the thick rubber from deforming excessively under interference, thereby maintaining both attachment strength and working pressure consistency.
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 maintains working pressure within a predetermined range even with increased interference, reducing the number of steps and costs associated with hole formation in the bearing device.
Implementation Method 1
an elastic tubular body constituted of an elastic member in tube form, integral with the metal annular body
Data Source
AI summary
A gas vent plug is mounted in an aperture communicating with a bearing cavity, and includes a metal annular body, and an elastic tubular body constituted of an elastic member in tube form, integral with the metal annular body, and having a vent at one end face of the tube, protruding outwards in the axial direction of the tube. A circular groove is provided at one end face of the elastic tubular body so as to encircle the vent. Accordingly, variation in the working pressure is eliminated even in the case where the interference is increased when the gas vent plug is mounted in the aperture.