Water Drainage Flap Durability Testing Under Continuous Pressure Load

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Solution Overview

Problem

Conventional durability testing apparatuses for airplane water drainage flaps cannot continuously apply loading force, leading to discontinuous simulation of the real environment and inaccurate testing results.

Innovation Solution

A durability testing apparatus with a vibration table, water inlet and discharge system, and control mechanisms to simulate flight conditions, including a water inlet flange disc, overflow valve, and pressure regulation, allowing continuous application of loading force and accurate testing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Duration of action of moving object

If conventional vibration testing apparatus is used to simulate airplane environment, then the testing setup is simple, but the loading force cannot be continuously applied resulting in discontinuous test

Engineering Contradiction:

Improvecontinuous testing durationVSAvoidtest accuracy

Core Design Contradiction:

Duration of action of moving objectVSReliability

Solution Approach 1:

The patent implements continuous loading force application through a mechanical linkage system that connects the vibration table to the water drainage flap assembly. The linkage includes a connecting rod that maintains constant force application during vibration cycles, eliminating the discontinuity problem of conventional testing where force is lost during flap rotation. This ensures the test runs continuously without interruption while maintaining reliable simulation of actual operating conditions.

Inventive Principle:

Principle #20Continuity of useful action

2Reliability

If fixtures are used to transmit vibration to water drainage flap, then the device complexity is low, but the simulation of real environment is insufficient

Engineering Contradiction:

Improveenvironment simulation accuracyVSAvoidtesting apparatus structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The testing apparatus is divided into distinct functional modules: a vibration table for generating vibrations, a water supply system with inlet flange disc and column for providing water pressure, a water drainage flap assembly with flap column and drainage plate, and a mechanical linkage system with connecting rod. Each module performs a specific function, allowing the complex simulation requirements to be met through coordinated operation of simpler subsystems rather than a single monolithic structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The mechanical linkage system acts as an intermediary between the vibration table and the water drainage flap assembly. The connecting rod transmits and transforms the vibration table's motion into continuous rotational motion of the flap, while maintaining constant loading force. This intermediary mechanism enables accurate environment simulation by properly coupling the vibration source with the test subject, solving the problem of insufficient simulation accuracy with simple fixtures.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Duration of action of moving object

If force loading device is used to simulate water pressure, then the testing is simplified, but the force cannot be continuously applied when flap blade turns

Engineering Contradiction:

Improvecontinuous force applicationVSAvoidtesting operation continuity

Core Design Contradiction:

Duration of action of moving objectVSEase of operation

Solution Approach 1:

The mechanical linkage system is designed with dynamic characteristics that adapt to the flap's rotational motion. The connecting rod is positioned and dimensioned to maintain optimal force transmission angle throughout the flap's rotation cycle, ensuring continuous force application. The linkage's geometry is specifically configured so that as the flap rotates, the connecting rod continuously pushes without losing contact or force, solving the operational discontinuity problem of conventional static loading devices.

Inventive Principle:

Principle #15Dynamics

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 apparatus provides a more realistic simulation of flight conditions, enabling continuous loading force application and accurate measurement of water drainage flap durability with lower costs.

Implementation Method 1

a vibration table for providing vertical reciprocal vibration

Methodology Applied

Scientific EffectVibration: Vibration

Implementation Method 2

the water inlet column and the flap column enclose a water inlet chamber

Methodology Applied

Scientific EffectPhysical Containment: Physical Containment

Data Source

PatentUS12601412B2Durability testing apparatus for water drainage flap, and testing method using the durability testing apparatus for water drainage flap

Publication Date: 2026.04.14 SUZHOU SUSHI TESTING INSTR CO LTD

AI summary

A durability testing apparatus for a water drainage flap to test the durability of the water drainage flap. The water drainage flap comprises a flap column, a water drainage plate arranged inside the flap column and a water drainage rotation shaft connected with the water drainage plate. The durability testing apparatus for the water drainage flap comprises: a vibration table for providing vertical reciprocal vibration and a water inlet flange disc fixed on the vibration table for supplying water to the water drainage flap, wherein the water inlet flange disc comprises a base fixed to the vibration table and a water inlet column arranged on the base and facing the water drainage flap, a water inlet is provided in the water inlet column, the water inlet column and the flap column enclose a water inlet chamber, and the water inlet communicates with the water inlet chamber.