Segmented Wiper Sealing Translating Ram Recesses
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Solution Overview
Problem
Existing wipers for translating rams with recessed portions fail to effectively seal against sharp edges and recessed features, leading to debris entry and potential jamming, as conventional designs cannot accommodate the sharp corners and require modifications that introduce gaps or finite radii, compromising sealing effectiveness.
Innovation Solution
A wiper design comprising a first element conforming to the recessed features and a second element fitting axially adjacent to the external surface of the translating ram, utilizing elastic materials like Turcon® for sealing, which allows for precise fitting and sealing around sharp edges and recessed portions, preventing debris entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional wiper design is used for translating rams with recessed portions, then the wiper can be manufactured with standard tools, but the wiper fails to seal effectively against sharp edges and recessed features, allowing debris entry
Solution Approach 1:
The wiper is divided into multiple segments: a body portion and one or more protrusions that extend into recessed features. This segmentation allows each part to be optimized independently - the body seals against the external surface while protrusions seal against internal sharp edges, achieving complete sealing without requiring complex manufacturing tools.
Solution Approach 2:
Different portions of the wiper have different geometries optimized for their specific sealing locations. The body portion has a shape conforming to the external surface, while protrusions have shapes conforming to recessed features with sharp edges. This local optimization enables effective sealing at each interface without compromising manufacturing feasibility.
2Reliability
If the wiper is designed to fit tightly around sharp edges and recessed portions, then sealing effectiveness is improved, but the wiper requires complex manufacturing modifications that introduce gaps or finite radii
Solution Approach 1:
By segmenting the wiper into a body and protrusions, the design accommodates sharp edges and recessed features without requiring the entire wiper to have complex geometry. Each segment can be manufactured with standard tolerances while collectively achieving tight sealing against all surfaces including sharp edges.
Solution Approach 2:
The protrusions are designed with rounded tips that can conform to sharp edges through elastic deformation or wear, eliminating the need for precise finite radius features. This curvature approach allows the wiper to seal against sharp edges while maintaining manufacturability with standard tolerances.
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 wiper effectively seals against both recessed and external surfaces, preventing debris from entering the actuator housing and maintaining low friction movement, thus enhancing the reliability and longevity of linear actuators with recessed portions.
Implementation Method 1
utilizing elastic materials like Turcon® for sealing, which allows for precise fitting and sealing around sharp edges and recessed portions
Data Source
AI summary
A wiper for a translating ram with recessed features includes a first element conforming to the recessed features of the translating ram; and a second element conforming to the external surface of the translating ram. The first element and second element conform to the cross-section of the translating ram when placed axially adjacent.