Fluid Resistant Solenoid Guide Rotation Prevention
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Solution Overview
Problem
Existing water-resistant solenoids face challenges in maintenance due to compromised environmental sealing when attempting to access internal components for servicing, as complete encapsulation prevents tool insertion and external forces can damage internal structures.
Innovation Solution
A solenoid assembly design featuring a frame, coil, plunger, and guide with a housing that prevents independent rotation of internal components, allowing for torque transfer during disassembly without compromising the potting and environmental integrity, using a mating portion and aperture configuration to secure the guide and frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coil components are completely encapsulated in potting material to provide water resistance, then environmental sealing is improved, but access to internal components for servicing is compromised
Solution Approach 1:
The solenoid is divided into sealed and unsealed sections. The housing includes a sealed section containing the coil and potting material, and an unsealed section providing access to internal components. This segmentation allows the device to maintain environmental sealing where needed while providing serviceability where required.
Solution Approach 2:
Different portions of the solenoid have different sealing characteristics. The coil components are completely encapsulated in potting material within the sealed section, while the unsealed section remains accessible. This local differentiation of quality (sealed vs. unsealed) resolves the contradiction between environmental protection and serviceability.
2Ease of repair
If openings are provided in the housing to allow tool access for servicing, then ease of repair is improved, but environmental sealing is compromised
Solution Approach 1:
The housing is segmented into a sealed section and an unsealed section. The unsealed section contains the necessary openings for tool access, while the sealed section maintains environmental protection. This spatial segmentation allows both requirements to coexist without compromising either.
3Ease of operation
If external forces are applied to the housing for assembly and disassembly, then ease of operation is improved, but internal structures may be damaged
Solution Approach 1:
A guide structure acts as an intermediary between the housing and internal components during assembly and disassembly. The guide includes a guide surface that directs and controls the application of external forces, preventing damage to delicate internal components while facilitating easy assembly and disassembly operations.
4Stability of the object's composition
If the guide is prevented from rotating independently of the frame and housing, then stability is improved, but device complexity increases
Solution Approach 1:
The guide and frame feature asymmetric mating portions with non-circular cross-sections. This asymmetric geometry prevents rotation of the guide relative to the frame and housing without requiring additional complex mechanisms. The asymmetric shape itself serves as the rotation prevention mechanism, simplifying the overall design.
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
Facilitates easy assembly and disassembly of solenoids while maintaining environmental sealing, ensuring the integrity of internal components and reducing the risk of damage during servicing.
Implementation Method 1
When a current is applied to the coil, the winding creates a magnetic field which acts upon the plunger, causing the plunger to reciprocate between a first and second position
Implementation Method 2
A guide is at least partially disposed within the core. The guide is prevented from rotating independently of the frame, wherein the plunger is disposed at least partially within the guide
Data Source
Figure 1
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AI summary
A solenoid assembly (100) is provided that includes a frame (104), a coil (106) positioned proximate the frame (104), and a core (114) defined by the coil (106). A plunger (108) is actuatable between at least a first position and a second position, and a guide (109) is at least partially disposed within the core (114). The plunger (108) is disposed at least partially within the guide (109). A housing (102) at least partially houses the frame (104), the coil (106), the guide (109) and the plunger (108), and the guide (109) is prevented from rotating independently of the housing (102).