Vane Cell Pump Compression Control via Guide Device
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Solution Overview
Problem
Conventional vane cell pumps experience pulsation issues due to varying compressibility of media, leading to weight fluctuations and damage during the conveying process, as existing methods for adjusting compression are either costly or harmful to sensitive products.
Innovation Solution
The method involves adjusting the guidance of vanes using a guide device, such as a clamping eccentric, to change the radial position and distance of the vanes within the pump housing, allowing for precise control of compression and pressure in the vane cell chambers, eliminating pulsation and improving weight accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If compression in vane cell chambers is increased to prevent pulsation under increased counter pressure, then pulsation is reduced, but the medium may be damaged due to excessive compression
Solution Approach 1:
The pump system dynamically adjusts compression levels by varying the radial position of vanes through a guide device. The guide device can be positioned to create different gap sizes between vanes and chamber walls, allowing the system to adapt compression to match outlet pressure conditions. This dynamic adjustment prevents pulsation when needed while avoiding excessive compression that would damage the medium.
Solution Approach 2:
The invention changes the physical parameter of gap size between vanes and chamber walls by adjusting the guide device position. By varying this geometric parameter, the system controls compression levels. When the guide device is positioned to create a larger gap, compression is reduced; when positioned to create a smaller gap, compression is increased. This parameter change allows matching of compression to outlet pressure conditions.
2Object-affected harmful factors
If a pressure relief valve is installed to handle overcompression, then medium damage is prevented, but unwanted stress and damage occur to the medium during the relief process
Solution Approach 1:
The guide device is positioned in advance to pre-establish the optimal gap size and compression level before the pumping process begins. By setting the correct compression level from the start, the system avoids overcompression scenarios that would require pressure relief valves. This preliminary configuration prevents the need for subsequent relief actions that would stress the medium.
3Adaptability or versatility
If the rotor is redesigned with different numbers of vanes to change compression, then compression can be adjusted, but manufacturing costs increase and geometric pulsation occurs
Solution Approach 1:
Instead of redesigning the rotor with different fixed numbers of vanes, the invention uses a dynamic guide device that can be positioned to create different effective compression levels with the same rotor configuration. This allows compression adjustment without changing the fundamental rotor design, maintaining manufacturing simplicity and avoiding geometric pulsation issues associated with different vane counts.
Solution Approach 2:
The invention adjusts compression by changing the positional parameter of the guide device rather than changing the number of vanes. This parameter adjustment (guide device position) achieves compression variation without requiring rotor redesign, thereby maintaining manufacturing ease and avoiding the geometric pulsation problems that would arise from different vane configurations.
4Adaptability or versatility
If the radial position of vanes is changed to adjust compression, then compression control is improved, but device complexity increases
Solution Approach 1:
The guide device acts as an intermediary element between the rotor and the chamber walls. Instead of directly controlling vane radial position through complex mechanisms, the guide device mediates this control by providing a simplified interface that adjusts the effective gap size. This intermediary approach achieves compression control while keeping the overall device structure relatively simple.
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 approach enables gentle handling of media, reduces the need for pressure relief valves, and prevents damage by allowing precise adjustment of compression to match different media types, ensuring consistent and accurate portioning without weight fluctuations.
Implementation Method 1
By compressing the substance to be filled, i.e. by reducing the volume of the closed chambers, the pressure in the chamber is increased.
Implementation Method 2
For calculating the chamber pressure, it can therefore be assumed in a simplified manner for the gas portion of the medium, that: p×v=const.
Implementation Method 3
The vanes are radial movable and are driven by a rotor. The vanes are in particular mounted radially displaceably in the rotor.
Implementation Method 4
a vane cell pump for performing the method comprises a pump housing, vanes, a rotor and a guide device for guiding the vanes
Data Source
AI summary
A method for adjusting the compression in the vane cell chambers in the compression region of a vane cell pump for conveying pasty substance, in particular sausage meat, and a corresponding vane cell pump, wherein the compression is adjusted by changing the guide of the vane.