Motor Junction Box Segmentation for Washdown Sealing

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Solution Overview

Problem

Electric motors used in harsh, wet, and corrosive environments, such as food processing facilities, experience short life cycles due to moisture and chemical contamination, leading to frequent failures and increased maintenance costs.

Innovation Solution

The design incorporates a power entry compartment and a power connection compartment with a removable cover and sealing member to create a moisture-tight seal, allowing for quick and efficient replacement of electrical connections, reducing downtime and extending motor life.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional motors are used in washdown environments, then they can operate in food processing facilities, but moisture and chemical contaminants cause short life cycles and frequent failures

Engineering Contradiction:

Improvemotor life cycleVSAvoidmoisture and chemical contamination

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The motor is divided into separate sealed compartments: a motor compartment housing the motor windings and a junction box compartment housing the electrical connections. This segmentation allows each compartment to be independently sealed against moisture and chemicals, preventing contaminants from reaching critical components and causing failures.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The junction box is designed as a removable, replaceable component. When electrical connections fail, the entire junction box can be quickly removed and replaced without disassembling or repairing the sealed motor compartment, reducing downtime and extending the effective life of the motor system.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Reliability

If electrical connections are sealed inside a junction box, then moisture protection is improved, but replacement time increases due to multiple screws and complex disassembly

Engineering Contradiction:

Improvemoisture protectionVSAvoidreplacement time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The electrical connection components are organized into a modular junction box assembly that can be removed as a single unit. This segmentation allows the entire sealed connection system to be replaced quickly by removing just a few fasteners, rather than disassembling multiple individual connections.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The junction box is pre-assembled with all electrical connections and seals in place during manufacturing. This preliminary assembly ensures proper sealing and connection integrity, while allowing the entire pre-tested assembly to be quickly installed or replaced without现场 assembly complexity.

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If multiple wire-to-wire electrical connections are made, then complete electrical functionality is achieved, but the complexity and time required to seal and replace connections increases

Engineering Contradiction:

Improveelectrical functionalityVSAvoidconnection complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Multiple wire-to-wire connections are combined into a single integrated junction box assembly. All electrical connections, seals, and mounting features are merged into one modular unit that functions as a complete assembly, reducing the complexity of individual connection management while maintaining full electrical functionality.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The junction box is designed as a universal module that can accommodate various electrical connection configurations and motor types. This multi-functionality allows the same basic junction box design to serve multiple purposes and applications, reducing overall system complexity while maintaining adaptability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS10284047B2Electric motor for washdown, food processing, and chemical applications

Publication Date: 2019.05.07 BLUFFTON MOTOR WORKS LLC

AI summary

An exemplary electric motor includes a power entry compartment, a power connection compartment, a removable cover, and a sealing member positioned between the power entry compartment and the power connection compartment to create a moisture-tight seal between the power entry compartment and the power connection compartment. The removable cover at least partially encloses or seals the power entry compartment and the power connection compartment. The power entry compartment receives the electrical wires that power the electric motor. The sealing member between the power entry compartment and the power connection compartment includes at least one wire channel to allow wires that power the electric motor to enter the power connection compartment from the power entry compartment. The power connection compartment houses one or more components used to make the electrical connections between the electrical wires and the motor.