Floor Sweeper Filter Shaking with Broad-Band Vibration Cleaning
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Solution Overview
Problem
Existing floor cleaning and sweeping machines face inefficiencies in filter cleaning due to frequent clogging and the need for costly replacements, with existing shaking or vibrating methods providing only partial cleaning effects, especially in dusty environments.
Innovation Solution
A filter cleaning system that uses a rotary electric motor with eccentric masses to apply a variable frequency shaking action to the filter plate, optimizing cleaning by spanning a broad band of oscillation frequencies and generating harmonic stresses, thereby effectively removing dust and dirt without excessive mechanical stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter plate is used for filtering air in floor cleaning machines, then filtering effectiveness is improved, but the filter plate becomes clogged frequently requiring periodic cleaning
Solution Approach 1:
The patent applies mechanical vibration through an electric motor with unbalanced weights that generate oscillating forces. The motor rotates at variable speeds to create vibrations in the filter plate, causing accumulated dust and dirt to detach and fall into a collection container below, thereby cleaning the filter without manual intervention
Solution Approach 2:
The filter cleaning system operates automatically using the motor-driven vibration mechanism. The system self-cleans the filter plate by utilizing the mechanical vibration to dislodge particles, eliminating the need for manual cleaning operations and reducing machine downtime
2Productivity
If a rotary motor with unbalanced weights is used to clean the filter, then cleaning effectiveness is improved, but mechanical stress on the filter plate increases
Solution Approach 1:
The patent employs variable speed rotation of the motor to dynamically adjust the vibration characteristics. By varying the rotational speed, the system can optimize cleaning effectiveness while controlling the intensity of mechanical stress applied to the filter plate, preventing damage during operation
Solution Approach 2:
The cleaning operation is performed periodically rather than continuously. The motor is activated at intervals to apply vibratory cleaning forces, allowing the filter to operate normally between cleaning cycles. This periodic application of mechanical stress prevents cumulative damage while maintaining cleaning effectiveness
3Ease of operation
If the motor operates at constant speed, then operation simplicity is improved, but cleaning effectiveness is reduced due to limited frequency range
Solution Approach 1:
The patent varies the rotational speed parameter of the motor to optimize cleaning performance. By adjusting the speed within a range rather than maintaining a constant value, the system can match different natural frequencies of the filter plate structure, enhancing vibration-based cleaning effectiveness while managing mechanical stress through controlled parameter variation
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 system achieves a more vigorous and effective cleaning of the filter, reducing maintenance needs and costs by ensuring a broader range of oscillation frequencies align with the natural eigenfrequencies of the filter plate portions, enhancing the overall cleaning efficiency and economic value of the machine.
Implementation Method 1
a rotary electric motor (5), whose rotor is applied on to a respective rotating shaft, to which there are firmly joined one or more eccentric and, therefore, unbalancing masses
Implementation Method 2
ensuring a broader range of oscillation frequencies align with the natural eigenfrequencies of the filter plate portions
Data Source
AI summary
A filtering device filters out impurities contained in an air stream, and includes an inner filter plate, an outer frame that houses said filter plate thereinside, a structure for retaining said filter plate and conveying the shaking motion, a support socle applied on to said structure, a rotary electric motor, whose rotor is provided with one or more unbalanced masses, and which is fixedly mounted on said socle. The electric motor is operated in an intermittent manner, preferably with a direct-current, substantially square-wave supply voltage according to an ON-OFF cycling pattern, so as to generate a very broad spectrum of shaking frequencies that proves more effective in enabling impurities to be removed from the filter plate.