Vacuum Ejector Seal Valve Structure for High-Pressure Break Air
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Solution Overview
Problem
Conventional vacuum ejectors face challenges in reliably releasing workpieces and maintaining seal integrity, especially when high-pressure break air is required to remove stuck workpieces or dust, and there is a need for a configuration that can adapt to different usage scenarios without unnecessary complexity or cost.
Innovation Solution
The vacuum ejector design includes a seal valve mechanism that remains closed even with high-pressure break air, using a piston and valve plug configuration to prevent break air from flowing into the vacuum generation mechanism, and a detachable seal valve unit that can be attached when high-pressure break air is needed, simplifying the apparatus configuration based on intended use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a seal valve is added to reliably seal the negative pressure flow path when high-pressure break air is supplied, then the reliability of workpiece release is improved, but the device complexity and cost increase
Solution Approach 1:
The vacuum ejector is divided into a main body and a detachable seal valve unit. The seal valve unit can be attached when high-pressure break air is needed and detached when not needed, allowing the system to have the seal valve only when required. This segmentation resolves the contradiction by making the seal valve optional rather than permanent, improving reliability when needed while avoiding unnecessary complexity during normal operation.
Solution Approach 2:
The seal valve unit is designed to be dynamically attachable and detachable from the vacuum ejector main body. This dynamic configuration allows the system to adapt its structure based on operational requirements - adding the seal valve when high-pressure break air is needed for stuck workpieces, and removing it when not needed, thus balancing reliability improvement with device simplicity.
2Reliability
If a seal valve mechanism is designed to remain closed with high-pressure break air, then the sealing performance is improved, but the device complexity increases
Solution Approach 1:
The seal valve mechanism uses the high-pressure break air itself to activate the sealing function. When high-pressure break air is supplied, it automatically actuates the piston and valve plug to close the seal opening, using the available pressure differential to its advantage. This self-service approach improves seal integrity while minimizing the need for additional complex control mechanisms.
Solution Approach 2:
The seal valve mechanism employs pneumatic pressure from the break air to operate the piston and valve plug. The high-pressure break air creates a pressure differential that automatically drives the sealing components into the closed position, utilizing fluid pressure principles to achieve reliable sealing without requiring complex mechanical actuation systems.
3Adaptability or versatility
If the seal valve unit is made detachable for configuration flexibility, then the adaptability is improved, but the ease of operation decreases
Solution Approach 1:
The seal valve unit is segmented as a separate detachable module from the vacuum ejector main body, designed with connection interfaces that allow for relatively simple attachment and detachment. This segmentation provides configuration flexibility for different application needs while aiming to minimize operational complexity through straightforward connection 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
This solution ensures reliable sealing of the negative pressure flow path even with high-pressure break air and allows for easy configuration changes by attaching or detaching the seal valve unit, optimizing the vacuum ejector's operation for various applications.
Implementation Method 1
generates negative pressure by causing compressed air to flow through a diffuser (also referred to as an ejector portion or vacuum generation mechanism)
Implementation Method 2
the valve plug is configured to be biased toward the seal opening from the break flow path side to block the seal opening
Implementation Method 3
a piston portion configured to receive pressure of the supply air to move the valve plug in a direction away from the seal opening
Data Source
AI summary
In a vacuum ejector provided with a seal valve mechanism between a vacuum generation mechanism and a break flow path, the seal valve mechanism includes a valve plug that is biased toward a sealing opening from the break flow path side to block the seal opening, and is configured to open the seal opening by moving the valve plug away from the seal opening using a piston portion that operates according to supply air supplied from the vacuum generation mechanism.