Double Membrane Pump With Segmented Rods for Low-Pulsation Delivery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing double membrane pumps face challenges with complex control of membrane movements, energy inefficiency, and unsuitable designs that hinder compactness and reliable operation.
Innovation Solution
A double membrane pump design featuring a split piston rod with independent guiding grooves for each membrane, coupled with a torque motor and guiding groove guide, allowing self-regulated oscillating movement without reversing the motor's direction, and minimizing pulsation through overlapping strokes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a reversing spindle is used to convert rotational movement into linear movement, then the membrane oscillating movement can be achieved, but the motor requires considerable energy to switch direction and the system becomes complex
Solution Approach 1:
The piston rod is divided into two separate sections (first piston rod section and second piston rod section) that can move independently. Each section is coupled to a respective membrane, allowing the membranes to oscillate in opposite directions simultaneously without requiring motor reversal. This segmentation eliminates the need for complex reversing mechanisms and reduces energy consumption.
Solution Approach 2:
Instead of using a reversing spindle that changes motor direction to achieve membrane oscillation, the invention inverts the approach by using a non-reversing motor with a segmented piston rod system. The membranes oscillate due to the independent movement of piston rod sections guided by guiding grooves, rather than through motor reversal. This inversion simplifies the control system and reduces energy requirements.
2Ease of operation
If a reversing spindle is used for membrane pump operation, then oscillating movement is achieved, but the design cannot realize short stroke movements and has poor force absorption
Solution Approach 1:
The piston rod is segmented into two independent sections that can move simultaneously in opposite directions. This segmentation allows each section to absorb forces independently and realize short stroke movements required for membrane pumps. The guiding grooves guide each section through its stroke, providing reliable force absorption throughout the movement cycle.
Solution Approach 2:
Guiding grooves are introduced as intermediary elements that guide the piston rod sections through their oscillating movements. These grooves ensure proper force transmission and absorption during the stroke, enabling reliable operation. The guiding grooves mediate between the motor's continuous rotation and the membranes' oscillating motion, providing smooth and reliable force transfer.
3Ease of operation
If a ball element in a sleeve is used to convert rotary movement to linear movement, then piston back and forth movement is achieved, but point loads cause tilting moments and additional wear
Solution Approach 1:
The piston rod is segmented into multiple sections with guiding grooves distributed along its length. This segmentation distributes the loads across multiple guiding grooves rather than concentrating them at single point contacts. The distributed guiding grooves eliminate tilting moments and reduce wear, improving service life while maintaining the back and forth movement function.
4Device complexity
If a single continuous piston rod is used, then structure is simple, but the membranes cannot be moved independently and stroke coordination is limited
Solution Approach 1:
The piston rod is divided into two separate sections (first and second piston rod sections) that can move independently of each other. Each section is coupled to a respective membrane, allowing independent control and coordination of membrane movements. This segmentation provides versatility in stroke coordination while maintaining relatively simple overall structure.
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 design achieves a compact, energy-efficient operation with reduced wear and pulsation, enabling uniform fluid delivery without the need for additional pulsation dampers and complex control systems.
Implementation Method 1
a guiding groove guide (29) which is designed to convert the rotational movement of the rotor (27) into a translational oscillating movement of the piston rod (25)
Implementation Method 2
with a drive device (26) for bringing about a translational movement of the piston rod (25)
Data Source
AI summary
A double membrane pump having a casing and a piston rod movably received in the casing, the casing having at least one inlet opening and at least one outlet opening, and a first membrane is arranged at one end of the piston rod and a second membrane is arranged at the other end of the piston rod. The first membrane is arranged in a first chamber of the double membrane pump and the second membrane is arranged in a second chamber. The membranes are designed to separate the chambers into a product chamber and an expansion chamber respectively. The pump has a drive device for bringing about a translational movement of the piston rod. The double membrane pump has a piston rod which is designed to perform a self-regulated, oscillating movement and thus enables simplified control of the membranes.