Magnetic Coupling for Compact Mobile Suction System
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Solution Overview
Problem
Conventional suction excavators are large, inflexible, and require specialized licenses for operation, making them unsuitable for small jobs or densely built-up areas, and they have limited service life due to mechanical constraints.
Innovation Solution
A mobile suction system with a magnetic clutch for selective power transmission to the vacuum generator, allowing flexible operation, compact design, and extended service life, along with a compressor for additional functionality and a self-propelled design for ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional suction excavators are mounted on a truck chassis, then they can perform excavation tasks, but they have a deadweight of 18 tons or more and cannot be used in difficult-to-access areas
Solution Approach 1:
The suction excavator is divided into separate functional modules: a compact vacuum generator unit, a suction container, and a chassis. This segmentation allows the heavy vacuum generator to be separated from the mobile platform, enabling the use of lightweight tracked chassis that can access difficult areas while maintaining the necessary excavation capability.
Solution Approach 2:
The patent replaces the traditional truck chassis with a tracked crawler chassis, substituting wheel-based mechanics with track-based mechanics. This substitution provides better traction and accessibility in soft or difficult terrain while significantly reducing the overall weight and eliminating the need for specialized driver licenses.
2Adaptability or versatility
If conventional suction excavators are used for small jobs, then they can perform excavation, but they are not cost-effective and require specialized driver licenses
Solution Approach 1:
The vacuum generator is equipped with a variable speed drive system that allows dynamic adjustment of the suction vacuum level according to the specific excavation task. This dynamic control enables the system to adapt to various job sizes and conditions, making it cost-effective for small jobs while simplifying operation to not require specialized licenses.
Solution Approach 2:
The compact suction excavator is designed with universal applicability for various tasks including excavation, cleaning of channels and pipes, and operation in densely built-up areas. The system can be used by operators with standard licenses, expanding its versatility and reducing operational barriers.
3Power
If a centrifugal clutch is used to couple the motor to the vacuum generator, then power transmission is achieved, but the service life is limited particularly when operated in a slip range
Solution Approach 1:
The patent replaces the mechanical centrifugal clutch with a magnetic coupling system. This substitution eliminates mechanical wear and slip associated with centrifugal clutches, significantly extending the service life while maintaining reliable power transmission from the motor to the vacuum generator across the full speed range.
Solution Approach 2:
The magnetic coupling system allows for continuous and smooth power transmission by changing the magnetic field strength parameter rather than relying on mechanical engagement and slip. This parameter-based control eliminates the wear and limited service life associated with mechanical clutch operation in slip ranges.
4Device complexity
If the vacuum generator is fixed to the drive shaft, then power transmission is straightforward, but the integration of additional components is limited
Solution Approach 1:
The magnetic coupling system provides a dynamic and flexible power transmission mechanism that can easily accommodate additional components. The magnetic field can be adjusted to couple or decouple the vacuum generator from the drive shaft, allowing for the integration of additional components driven by the motor while maintaining simple power transmission when needed.
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
Enables precise material removal in sensitive areas, reduces the risk of damage, and allows for efficient operation in confined spaces with reduced maintenance needs and no requirement for specialized licenses.
Implementation Method 1
the vacuum generator coupling is a magnetic coupling
Implementation Method 2
The suction vacuum, which in this context refers to a negative pressure below ambient pressure and not a complete vacuum, creates a pressure difference that transports the material to be excavated through a suction hose into the suction container
Data Source
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AI summary
The invention relates to a mobile suction system (1) for lifting material using a suction vacuum, comprising a vacuum generator (13) for generating the suction vacuum, a drive (19) for driving the vacuum generator (13), wherein the drive (19) has a drive shaft (25), and a vacuum generator coupling (41) for selective power transmission from the drive (19) to the vacuum generator (13). The vacuum generator coupling (41) is designed as a magnetic coupling (43). The invention further relates to a system comprising a mobile suction system (1) and a transport trailer for the mobile suction system (1), a method (200) for controlling a mobile suction system (1), and a computer program.