Stepper Motor Compressed Air Distributor for Noise and Thermal Reduction
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Solution Overview
Problem
Current compressed air distribution systems in small sewage treatment plants face issues such as switching noises from solenoid valves, high power consumption, insecure valve closure, and thermal problems due to solenoid valve design, and complex sealing and repair challenges with stepper motor-based systems.
Innovation Solution
A compressed air distribution device with a stepper motor drive attached to the base body outside the pressure chamber, using a height-adjustable axis with a sealing element and spring support, allowing for precise sealing and reduced motor stress, and incorporating a pressure sensor for monitoring and maintaining system tightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If solenoid valves are used for compressed air distribution, then the air distribution function is achieved, but switching noises occur and power consumption increases
Solution Approach 1:
The patent replaces the electromagnetic solenoid valve system with a mechanical stepping motor-driven valve system. The stepping motor converts electrical pulses into precise mechanical movements to open/close valves, eliminating the electromagnetic coil and plunger mechanism that generates switching noises. This mechanical substitution maintains full air distribution functionality while removing the noise-generating electromagnetic components.
Solution Approach 2:
The stepping motor operates by receiving periodic pulse signals that control the sequential opening and closing of individual valve outlets. Each pulse triggers a discrete mechanical movement of the valve mechanism, enabling timed, periodic air distribution to multiple consumers without continuous power consumption or electromagnetic switching noise.
2Ease of operation
If solenoid valves are used for compressed air distribution, then the air distribution function is achieved, but power consumption increases during opening process
Solution Approach 1:
The patent replaces the continuous power-consuming electromagnetic coil of solenoid valves with a stepping motor system that consumes power only during discrete positioning movements. The holding position is maintained mechanically without continuous electrical power, dramatically reducing overall power consumption while preserving air distribution control functionality.
Solution Approach 2:
The stepping motor receives periodic pulse signals only when valve position changes are required. Between pulses, the motor consumes minimal to no power while maintaining valve positions through mechanical means, replacing the continuous power consumption of solenoid valves with intermittent, pulse-based actuation.
3Ease of operation
If solenoid valves are used for compressed air distribution, then the air distribution function is achieved, but secure closure is compromised
Solution Approach 1:
The patent replaces the solenoid valve's electromagnetic plunger mechanism with a stepping motor-driven mechanical valve system featuring a tappet and sealing element. This mechanical system provides positive, secure closure through direct mechanical contact and spring-loaded sealing, eliminating the risk of incomplete closure associated with weak return springs in solenoid valves.
Solution Approach 2:
The valve system incorporates a spring mechanism that automatically ensures secure closure of the sealing element against the valve seat when the stepping motor retracts the tappet. The spring provides continuous sealing force without requiring active control, ensuring reliable closure even if the motor stops mid-position, making the system self-securing.
4Ease of operation
If solenoid valves are used for compressed air distribution, then the air distribution function is achieved, but thermal problems occur
Solution Approach 1:
The patent replaces the solenoid valve's electromagnetic coil and hot valve body with a stepping motor positioned externally to the compressed air chamber. The motor actuates the valve mechanism through magnetic coupling or mechanical linkage without being exposed to hot compressed air, transferring the thermal load away from the motor and control electronics.
Solution Approach 2:
The patent separates the stepping motor from the compressed air chamber, positioning it externally where temperatures are lower. The motor is connected to the internal valve mechanism through a sealed interface, dividing the system into a hot zone (air chamber) and a cool zone (motor housing), thereby protecting the motor from thermal damage while maintaining air distribution function.
5Ease of operation
If stepper motors are integrated into a closed housing for compressed air distribution, then the air distribution function is achieved, but housing complexity and sealing requirements increase
Solution Approach 1:
The patent extracts the stepping motor from the pressure-tight housing and positions it externally. Only the essential valve components (tappet, sealing element, valve body) remain inside the compressed air chamber, while the motor housing is separate. This eliminates the need for complex pressure-tight cable glands and multi-part sealed housings, simplifying the overall structure while maintaining air distribution functionality.
Solution Approach 2:
The patent introduces a sealed interface or magnetic coupling mechanism as an intermediary between the external motor and internal valve mechanism. This intermediary allows the motor to actuate the valve without being enclosed in the pressure chamber, enabling simple separate motor and housing designs while maintaining the air-tight integrity of the compressed air distribution system.
6Ease of operation
If stepper motors are integrated into a closed housing for compressed air distribution, then the air distribution function is achieved, but repair time increases
Solution Approach 1:
The patent extracts the stepping motor from the pressure-tight housing, making it externally accessible and independently serviceable. If the motor fails, it can be replaced without opening the housing or disturbing the compressed air chamber, dramatically reducing repair time. The internal valve components remain undisturbed during motor replacement.
Solution Approach 2:
The patent divides the system into separable modules: the external motor assembly and the internal valve housing. This segmentation allows the motor to be independently accessed, tested, and replaced without affecting the air distribution chamber or requiring complex disassembly procedures, enabling rapid maintenance and repair.
7Ease of operation
If stepper motors are integrated into a closed housing for compressed air distribution, then the air distribution function is achieved, but thermal stress on motors increases
Solution Approach 1:
The patent extracts the stepping motor from the hot compressed air chamber and positions it externally in a cooler environment. The motor actuates the internal valve through a sealed interface or magnetic coupling without being exposed to high temperatures, eliminating thermal stress on the motor windings and electronics while preserving air distribution control.
Solution Approach 2:
The patent separates the thermal zones by placing the motor externally and the valve internally within the compressed air chamber. This spatial segmentation protects the temperature-sensitive motor from the hot environment while allowing it to control the hot compressed air distribution system through a thermally isolated interface.
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 reduces switching noise, power consumption, and thermal stress on the motor, simplifies maintenance, and extends system lifespan by ensuring secure sealing and efficient operation with reduced mechanical and thermal load on the stepper motor.
Implementation Method 1
at least one spring (17, 18) which presses the sealing element (14) against the outlet (23)
Implementation Method 2
The axis (6) has a corresponding thread, at least in a partial area (in the area that extends into the stepper motor), so that when the stepper motor is switched on, the axis (6) can be moved linearly
Data Source
AI summary
The invention relates to a method and a device for compressed air distribution with energy-efficient, mechanical, and thermal optimization, comprising a base body [2], a compressed air supply line [12] into the base body [2], and at least one compressed air discharge line [11] from the base body [2], as well as at least one stepper motor [1] with a movable shaft [6, 9] to which a sealing element [7, 10] is attached. The device can be described as a stepper motor distribution system with thermal, mechanical, and energy optimization.