Air Filter Discharge Pipe Design for Droplet Re-entrainment
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Solution Overview
Problem
Existing air filters in pneumatic systems fail to increase the cleanliness of air by allowing purified air to swirl and re-introduce foreign matters, such as liquid droplets, back into the discharge pipe due to incomplete separation and cyclone effects.
Innovation Solution
A filter design featuring a swirl flow generating portion that converts air into a swirl flow, a conical separation chamber, a collection container with a baffle plate and fins to guide and restrict the swirl motion, preventing foreign matters from re-entering the discharge pipe and ensuring efficient separation and collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If air is swirled inside the cylinder to purify air by separating foreign matters through centrifugation, then foreign matters are removed from air, but purified air whirls up foreign matters in the collection container and discharges them toward the secondary port, reducing air cleanliness
Solution Approach 1:
The harmful cyclone effect is extracted and eliminated by providing a discharge pipe that extends downward to a position below the liquid level in the collection container. This allows purified air to be discharged directly from the bottom without swirling through the collection container, preventing the re-introduction of foreign matters while maintaining efficient separation in the upper cylinder portion
Solution Approach 2:
The discharge pipe acts as an intermediary structure that provides a separate pathway for purified air discharge. By extending the discharge pipe below the liquid level and providing a discharge port at the bottom, it creates an independent discharge route that bypasses the collection container's swirl zone, preventing foreign matters from being re-introduced into the discharged air
2Quantity of substance
If a collection container is provided to collect foreign matters, then foreign matters are stored for removal, but purified air flows into the collection container and swirls foreign matters upward, causing them to be discharged through the discharge pipe
Solution Approach 1:
The harmful swirl flow path is extracted and removed by configuring the discharge pipe to extend below the liquid level in the collection container. This separates the air discharge path from the foreign matter collection zone, allowing the container to maintain its collection function while eliminating the harmful effect of re-swhirling and re-discharging foreign matters
Solution Approach 2:
The filter structure is segmented into distinct functional zones: the upper cylinder portion for separation, the collection container for storage, and the discharge pipe for purified air removal. This segmentation allows each component to perform its specific function independently, preventing interference between collection and discharge processes
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 filter effectively separates and collects foreign matters, enhancing the removal efficiency and preventing re-introduction of liquid droplets into the discharge pipe, thereby improving air cleanliness and maintaining high removal rates.
Implementation Method 1
a pneumatic device, such as a pneumatic cylinder, is supplied with air from a pneumatic source via a pneumatic line such as piping or hose. By connecting the pneumatic source and the pneumatic device via the pneumatic line, a pneumatic circuit is formed. Air to be supplied from the pneumatic source to the pneumatic device is handled as air to be treated, and the pneumatic circuit is provided with a filter for removing foreign matters, such as water droplets or oil droplets or dusts, contained in the air to be treated.
Implementation Method 2
A filter adapted to swirl air in a cylinder to utilize the difference in centrifugal force between air and foreign matters, in order to remove foreign matters such as liquid droplets or dusts contained in the air, the foreign matters are fallen down along an inner peripheral surface of the cylinder
Implementation Method 3
the foreign matters are carried along the inner peripheral surface of the cylinder toward the discharge port, and are fallen down into the collection container
Data Source
AI summary
This filter is used to purify air by removing foreign matters such as liquid droplets contained in the air. A separation unit (23) is formed with a port block (13) and a separation cylinder (20), and the port block is formed with a primary port (11) and a secondary port (12). From the secondary port (12), the air purified by removing the foreign matters in a separation chamber (25) of the separation unit (23) is flowed out. A discharge pipe (37) for guiding the purified air to the secondary port (12) is disposed in a center portion of a swirl flow generating chamber (24). The foreign matters discharged from the discharging port (31) are collected in a collection container (27). In the collection container (27), a baffle plate 51 having a liquid guiding surface (50) is provided. A fin (52) is provided in an outer peripheral portion of the baffle plate (51), and the liquid guiding surface (50) positioned at a center portion of the baffle plate (51) is flat.