Electric Actuator Dust Collection with Variable Suction Spacing
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Solution Overview
Problem
Existing electric actuators used in clean rooms face challenges in uniformly aspirating and removing dust generated within the device, as the conventional dust collecting structures are not suitable for preventing dust discharge to the exterior and often leave deposits farthest from the negative pressure source untouched.
Innovation Solution
The electric actuator incorporates negative pressure supply pipes with at least three suction holes along the axial direction, where the distances between adjacent suction holes decrease stepwise as they move further from the negative pressure supply port, ensuring even and uniform aspiration of dust within the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple suction holes are arranged at equal distances in a dust collecting pipe, then the structure is simple, but dust cannot be aspirated evenly along the axial direction and remains deposited in the casing
Solution Approach 1:
The patent applies local quality by varying the spacing between suction holes along the axial direction of the dust collecting pipe. Specifically, the distance between adjacent suction holes becomes progressively smaller as one moves from the front end toward the rear end of the pipe. This non-uniform distribution creates different local suction characteristics: suction holes near the front end (closer to the negative pressure source) have larger spacing, while those near the rear end (farther from the source) have smaller spacing, ensuring uniform dust aspiration throughout the entire pipe length.
2Device complexity
If the dust collecting pipe is disposed on the exterior of the casing with upward-opening slits, then the structure is simple, but dust is temporarily discharged to the exterior of the casing
Solution Approach 1:
The patent applies the nesting principle by placing the dust collecting pipe inside the casing rather than on its exterior. The pipe is positioned within the interior space of the casing, allowing it to access dust particles generated inside the casing without requiring external openings. This nested configuration enables the suction holes to be formed on the outer circumference of the pipe, facing inward toward the casing interior, thereby preventing dust from being discharged to the exterior while maintaining effective dust collection.
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 configuration allows for reliable and uniform aspiration and removal of dust along the axial direction, preventing external discharge and improving dust collection efficiency, even at distances farthest from the negative pressure source, while reducing the need for high negative pressure fluid flow rates, thus conserving energy.
Implementation Method 1
a negative pressure supply pipe disposed in the interior of the body and into which the negative pressure fluid is supplied from the negative pressure supply port
Data Source
AI summary
In a body of an electric actuator, dust collecting pipes are disposed as a pair along an axial direction of a hole portion of the body. The dust collecting pipes are connected respectively to negative pressure supply ports provided in an end block, and include plural first through fifth suction holes separated mutually along an axial direction of the dust collecting pipes. Distances between the first through fifth suction holes are formed so as to become smaller stepwise from one end side of the dust collection pipes, on the side of the negative pressure supply ports, to the other end side thereof.