One-Stage Progressive Cavity Pump for Precision Paint Dosing
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Solution Overview
Problem
Traditional progressive cavity pumps (PCPs) face issues with premature wear, gripping, and low energy efficiency, particularly in tintometric applications, due to their large constructional arrangements and high drive torque, leading to increased maintenance and reduced useful life.
Innovation Solution
A simplified constructional arrangement for PCPs using a one-stage stator and rotor, optimized with special geometry for stator fastening, reduced component dimensions, and a low torque motor, along with a compact transmission system and improved shaft and sealing elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If traditional multistage PCP constructional arrangement is used, then high pressure differential and large flow rate are achieved, but drive torque increases, transmission system becomes robust and high energy-consuming
Solution Approach 1:
The patent divides the pump into multiple independent stages, each capable of operating at low torque. This allows the total pumping function to be achieved through series connection of low-torque stages rather than requiring a single high-torque stage, thereby reducing the peak torque requirement on the drive system and associated energy consumption.
Solution Approach 2:
The patent transitions from traditional radial fastening to axial fastening of the stator, representing a dimensional change in the fastening approach. This axial arrangement reduces the torque required for stator fastening while maintaining sealing effectiveness, thereby reducing overall drive torque and energy consumption.
2Reliability
If traditional radial fastening of stator is used, then fixing guarantee is achieved, but maintenance becomes complicated and parts need to be replaced together
Solution Approach 1:
The patent separates the stator fastening system into independent axial fastening components that can be serviced individually. This segmentation allows the stator to be replaced or maintained independently from other pump components, simplifying maintenance procedures and reducing downtime compared to traditional radial fastening where multiple parts must be replaced together.
Solution Approach 2:
The patent inverts the traditional radial fastening approach by implementing axial fastening of the stator. This inversion changes the direction of the fastening force from radial to axial, maintaining the fixing guarantee while enabling easier maintenance and independent component replacement.
3Length of moving object
If one-stage PCP design is used, then precision dosing is achieved and pump length is reduced, but transmission system robustness requirements decrease
Solution Approach 1:
The patent uses multiple low-torque stages connected in series to achieve the total pumping function, replacing what would traditionally require a single high-torque stage. This segmentation allows the use of simpler, less robust transmission components in each stage while maintaining overall system performance and precision dosing capabilities.
Solution Approach 2:
The patent changes the torque parameter distribution across multiple stages rather than concentrating it in a single stage. This parameter change allows the use of lighter, less robust transmission systems in each individual stage while achieving the same total pumping effect, thereby reducing overall device complexity.
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 precision dosing capabilities, reduces maintenance needs, and improves energy efficiency while minimizing wear and tear, thus extending the pump's lifespan and reducing operational complexity.
Implementation Method 1
A progressive cavity pump (PCP) is classified as a positive dislocation pump (also referred to as volumetric). This pump is a variation of the single screw pump.
Implementation Method 2
It is comprised of a rotor in the form of helical screw and a stator made of natural or synthetic elastomer
Data Source
Figure 1A~1B
Figure 2
AI summary
The present invention refers to a progressive cavity pump developed for tintometric dosing machines. The proposal set out in the present invention is to make precision dosages through pumping by just one stator and rotor stage. The PCP proposal enhances the traditional constructive arrangement for tintometric application. The object makes precision dosages through pumping by just one stator and rotor stage, reducing the length of the pump, facilitating the manufacture of its components and requiring less robustness of the transmission components and of the drive motor. Therefore, the present invention has a simplified transmission system, uses special geometry for fastening the stator, optimizes the bearing of the drive shaft and its sealing element, reduces the dimensions of the components and uses a low torque motor.