Modular Ejector Assembly With Locking Fit for Low-Cost Vacuum Generation
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Solution Overview
Problem
Existing ejector devices are complex and costly to produce, lacking a simple and economical design for easy integration.
Innovation Solution
The ejector device features a base body with a suction chamber, mixing channel, and drive nozzle device, where the suction chamber and mixing channel elements are distinct plastic injection-molded components connected via a flange region, utilizing a translational and rotational locking device for secure attachment without additional tools, and a drive nozzle element made from a harder material for enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If existing ejector devices are used, then functional requirements are met, but production cost and device complexity increase
Solution Approach 1:
The ejector device is divided into modular components: a base body containing the suction chamber, a mixing channel element, and a drive nozzle device. These segments can be produced separately using plastic injection molding and then assembled together, reducing overall production complexity and cost while maintaining functional integrity.
Solution Approach 2:
The base body is designed to serve multiple functions: it contains the suction chamber, provides mounting surfaces for the drive nozzle device, and includes connection elements for assembling the mixing channel element. This multi-functionality reduces the total number of components needed, simplifying manufacturing.
2Ease of manufacture
If components are integrated into a single piece, then manufacturing steps are reduced, but assembly flexibility and adaptability decrease
Solution Approach 1:
The mixing channel is designed as a separate injection-molded element that can be assembled to the base body, allowing each component to be optimized for its specific manufacturing process while maintaining assembly flexibility for different configurations.
Solution Approach 2:
The suction chamber and drive nozzle device are integrated into a single base body component produced by plastic injection molding, reducing the number of manufacturing steps while maintaining the ability to separately assemble the mixing channel element for adaptability.
3Reliability
If connection elements are added for secure assembly, then assembly reliability increases, but device complexity and production cost increase
Solution Approach 1:
The connection elements are integrated directly into the base body and mixing channel element as part of their injection-molded structure. This merging of connection features with the main components ensures reliable assembly through form-fit connections without requiring separate fasteners or additional complex joining mechanisms.
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 design simplifies production and integration while ensuring a reliable, cost-effective, and durable ejector device capable of efficiently creating a vacuum for suction and discharge applications, particularly in oil mist management systems.
Implementation Method 1
a drive nozzle device (108) for generating and directing a propelling medium jet out of the suction chamber (104) along a jet direction (192) and into the mixing channel (106)
Implementation Method 2
The ejector device may, in particular, be a jet pump for creating a vacuum
Implementation Method 3
a mixing channel (106) for mixing a propelling medium with the suction medium
Data Source
AI summary
An ejector device having a base body that includes a suction chamber for sucking in a suction medium, a mixing channel for mixing a propelling medium with the suction medium, and a drive nozzle device for generating and directing a propelling medium jet along a jet direction from the suction chamber and into the mixing channel. The ejector device also includes a fastening device for fastening the base body of the ejector device to a suction channel. The fastening device also includes at least one of a translational locking device for avoiding a translational movement of the base body relative to the suction channel in a direction running parallel to a center axis of a connecting piece of the suction channel and a rotational locking device for preventing the base body from rotating relative to the suction channel.