Vacuum Unit Ejector Design for Rapid Suction Release Switching
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Solution Overview
Problem
Existing vacuum units are complex and time-consuming when switching between suction and release operations due to the use of external ports, latch circuits, or non-return valves, leading to increased component wear.
Innovation Solution
A vacuum unit design that uses an air flow to deflect the air flow from the inlet nozzle, minimizing the need for valve operations and reducing wear by maintaining a constant air flow through the inlet nozzle, allowing for rapid switching between suction and release operations using fewer components and conduits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If external ports, latch circuits, or non-return valves are used to realize release operation, then the vacuum unit can switch between suction and release operations, but the device complexity increases and switching time increases
Solution Approach 1:
The patent combines the suction and release operations into a single ejector device by integrating the release air inlet directly into the ejector structure. The release air inlet is positioned to directly interfere with the primary air flow path, allowing the same ejector to perform both suction and release functions without requiring separate valves or external ports.
Solution Approach 2:
The ejector is designed to perform multiple functions: it can operate in suction mode by itself, or in release mode when release air is supplied through the integrated release air inlet. This multi-functionality eliminates the need for separate components dedicated to release operations, reducing overall device complexity.
2Adaptability or versatility
If external ports, latch circuits, or non-return valves are used to realize release operation, then the vacuum unit can switch between suction and release operations, but the switching time increases
Solution Approach 1:
The release air inlet is pre-positioned within the ejector structure such that release air can immediately interfere with the primary air flow path when supplied. This eliminates the time required to open valves or activate latch circuits, as the geometric configuration is already in place to enable immediate release operation.
Solution Approach 2:
The patent uses pneumatic principles by introducing release air that directly interferes with the primary air flow in a controlled manner. The release air creates a pressure field that rapidly disrupts the vacuum formation, enabling fast switching from suction to release mode through fluid dynamic control rather than mechanical valve operations.
3Adaptability or versatility
If multiple valve operations are performed to switch between suction and release operations, then operational mode switching is achieved, but component wear increases
Solution Approach 1:
The patent extracts the release function from separate valve mechanisms and integrates it directly into the ejector's geometric structure through the release air inlet. This eliminates the need for moving parts and valve operations, thereby removing the source of component wear while maintaining the ability to switch between operational modes.
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 solution enables faster switching between operational modes, reduces component wear, and simplifies the vacuum unit design, resulting in shorter processing times and increased accuracy in applications like work gripping tools.
Implementation Method 1
an air flow from an air source can flow through an inlet nozzle of the ejector to create a vacuum
Implementation Method 2
Vacuum ejectors that work in accordance with the so-called Venturi principle are known to the art and are used to generate a sub-pressure
Implementation Method 3
an air flow from an air source can be used for deflecting the air flow from the inlet nozzle of the ejector, thereby switching from suction operation to release operation
Data Source
Figure 1~2
Figure 3~5
Figure 6~8
AI summary
A vacuum unit comprises an inlet nozzle (10) having an input for compressed air and an output, an outlet nozzle (20) having an input and an output. A space (S) is provided between the output of the inlet nozzle and the input of the outlet nozzle and a vacuum opening (V) is in connection with the space. This space has a connection to a source of air (R) arranged at an angle to the output of the inlet nozzle, so that air entering the space (S) deflects the air flow from the inlet nozzle away from the input of the outlet nozzle. A vacuum unit is thereby provided which has fewer component parts and ducts or conduits than earlier units of this kind.