Rotor Spinning Drive Housing Cleaning With Pulsed Compressed Air
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Solution Overview
Problem
In rotor spinning machines, contaminants are sucked into the drive housing when the rotor housing is opened, leading to potential damage to the bearing and drive due to incomplete pressure equalization, and existing solutions either require frequent filter cleaning or labyrinth seals.
Innovation Solution
Compressed air is intermittently fed into the drive housing to blow off dust and fiber particles that have settled, using a directed air flow to specifically clean contaminated areas, particularly the bearing gap, without the need for continuous pressure equalization or filter maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If compressed air is continuously supplied to the drive housing through a filter, then contaminants are prevented from entering the drive housing, but the filter becomes clogged and requires frequent cleaning
Solution Approach 1:
Instead of continuous filtered air supply, the invention uses periodic compressed air pulses to blow contaminants out of the drive housing through the connecting opening. This intermittent cleaning action eliminates the need for continuous filtration, avoiding filter clogging and cleaning downtime while maintaining protection of the drive housing.
2Ease of operation
If the rotor housing is opened for maintenance, then access is provided for servicing, but contaminants are sucked into the drive housing due to vacuum pressure
Solution Approach 1:
The invention converts the harmful vacuum pressure that sucks contaminants into the drive housing into a beneficial force by using compressed air to blow contaminants out through the same connecting opening. The vacuum that causes contamination is transformed into a pathway for contaminant removal when compressed air is applied.
3Reliability
If a labyrinth seal is installed between drive housing and rotor housing, then contaminants are prevented from entering during spinning, but device complexity increases
Solution Approach 1:
Instead of adding a labyrinth seal structure between the drive housing and rotor housing, the invention extracts the sealing function by using compressed air to actively blow contaminants out through the existing connecting opening. This removes the need for additional sealing components while maintaining protection.
4Reliability
If compressed air is supplied to blow off contaminants, then bearing and drive are protected from contamination, but additional compressed air supply system is required
Solution Approach 1:
The compressed air supply system serves multiple functions: it blows contaminants out of the drive housing during normal operation, cleans the bearing gap, and can be used for maintenance activities. This multi-functionality justifies the addition of the compressed air system by providing comprehensive protection and cleaning capabilities.
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 method effectively prevents contamination of the drive housing and bearing, reducing the risk of damage while avoiding unproductive downtimes and filter maintenance, and can be performed during operation or at intervals, ensuring continuous spinning device functionality.
Implementation Method 1
Compressed air is supplied to the drive housing for cleaning the bearing. A directed air flow is generated within the drive housing, in particular in the bearing gap, in order to blow off dust and fiber particles.
Implementation Method 2
The rotor shaft is supported in the drive housing by means of a bearing assembly, in particular a magnetic bearing. The contactless bearing, in particular a magnetic bearing, allows the rotor shaft to be supported without contact.
Implementation Method 3
the rotor cup is arranged in a rotor housing which is subjected to negative pressure, the negative pressure being required for the spinning process
Data Source
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AI summary
In a method for operating a spinning device (2) of a rotor spinning machine (1), in which a spinning rotor (5) with a rotor cup (6) and a rotor shaft (7) is set in rotation by means of a drive (11) arranged in a drive housing (8) and operatively connected to the rotor shaft (7), and the rotor shaft (7) is supported in the drive housing (8) by means of a bearing (10, 18), wherein the rotor cup (6) is arranged in a rotor housing (9) pressurized with negative pressure, and the rotor shaft (7) extends through a connecting opening (12) between the drive housing (8) and the rotor housing (9), so that the drive housing is also under negative pressure during the spinning process, compressed air is supplied into the drive housing (8) via an air inlet.Compressed air is supplied to the drive housing (8) via the air inlet for cleaning the drive housing and/or the bearings (10, 18) at intervals, preferably at adjustable time intervals. A corresponding spinning device (2) of a rotor spinning machine (1) has a control unit for controlling the compressed air supply, by means of which the compressed air can be supplied to the drive housing (8) via the air inlet at intervals, preferably at adjustable time intervals.