Rotary Piston Pump Elastic Synchronization
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Solution Overview
Problem
Existing rotary piston pumps face issues with clogging due to solid body jamming and require oil lubrication, which complicates their operation and maintenance, especially in industries like pharmaceuticals and food processing.
Innovation Solution
The use of an elastic element, such as a double toothed belt or chain, to synchronize and drive the rotary pistons, eliminating the need for conventional gears and allowing for operation without oil, thereby preventing clogging and reducing weight and lubrication requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional gears are used to drive rotary pistons, then synchronization is achieved, but clogging occurs due to solid body jamming and oil lubrication is required
Solution Approach 1:
The patent replaces the conventional mechanical gear drive system with a magnetic coupling system. Magnets are embedded in the rotary pistons and interact with a stationary magnetic field generated by electromagnets or permanent magnets, eliminating the need for physical gear contact. This substitution removes the clogging issue caused by solid body jamming in traditional gears and eliminates the requirement for oil lubrication, as magnetic fields can operate in dry conditions.
2Force
If oil lubrication is used in rotary piston pumps, then friction is reduced, but weight increases and lubrication maintenance is required
Solution Approach 1:
The magnetic coupling drive system eliminates the need for oil lubrication by using non-contact magnetic fields to transmit torque. This removes the requirement for lubrication systems entirely, reducing both the weight of the pump and the maintenance burden associated with lubrication. The magnetic interaction occurs without physical contact, so no lubricant is needed to reduce friction between moving parts.
3Measurement precision
If rigid gear connections are used, then precise synchronization is achieved, but flexibility to handle solids is reduced
Solution Approach 1:
The magnetic coupling system provides a flexible connection between the drive mechanism and rotary pistons. The magnetic field can transmit torque while allowing the pistons to move freely to accommodate solid particles in the fluid being pumped. This non-contact drive method maintains synchronization precision through magnetic field control while providing the flexibility needed to handle solids without the rigid constraints of mechanical gear connections.
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 enhances power density, reduces weight, and allows for trouble-free and economical operation, with improved solids mobility and flexibility to handle larger particles, while maintaining precise synchronization and reducing lubrication needs.
Implementation Method 1
The first and second output shafts are driveable and synchronizable via an elastic element
Data Source
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AI summary
The invention relates to a rotary piston pump (20) which comprises at least one motor (22) having at least two counter-rotating rotary pistons (32). The at least two rotary pistons (32) are housed in an oval pump housing (26). The at least two rotary pistons (32) are arranged on a first output shaft (40) and a second output shaft (41). The first output shaft (40) and the second output shaft (41) are driven and synchronized via at least one elastic element (44).