Peristaltic Pump Adjustable Counter Bearing
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Solution Overview
Problem
Existing peristaltic pumps face issues with mechanical stress on hoses due to alternating crushing, slippage, and varying pressure, leading to potential hose damage and cumbersome maintenance, especially with spring-based counter-pressure systems that lose resilience over time.
Innovation Solution
A peristaltic pump design featuring a conical positioning surface on the counter bearing adjustable via an external thread mechanism, allowing for precise adjustment of the distance between squeezing elements and the counter bearing to compensate for manufacturing and material tolerances, reducing mechanical stress and maintaining consistent pump pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring-based counter-pressure system is used to press the hose against the rollers, then sufficient squeezing force is ensured, but the spring loses resilience over time and requires cumbersome maintenance
Solution Approach 1:
The invention extracts and removes the spring component from the system entirely. Instead of using a spring-based counter-pressure system, the patent employs a direct mechanical adjustment mechanism where the distance between the roller support and counter bearing can be manually adjusted. This eliminates the spring while maintaining sufficient squeezing force through proper mechanical positioning.
Solution Approach 2:
The system is designed to be self-regulating through its adjustable geometry. The distance adjustment mechanism allows the pump to maintain optimal squeezing force without requiring active compensation for wear or relaxation, as the mechanical connection directly transmits force without elastic intermediaries that degrade over time.
2Device complexity
If the distance between rollers and counter bearing is fixed, then the structure is simple, but manufacturing tolerances and material inequalities cannot be compensated
Solution Approach 1:
The invention transforms the fixed distance into a variable, adjustable distance between the roller support and counter bearing. This dynamic adjustment capability allows the system to compensate for manufacturing tolerances and material variations in the hose, while the adjustment mechanism itself remains relatively simple and intuitive.
3Reliability
If the spring prestressing force is increased to ensure functional compression, then hose compression is guaranteed, but the hose is subjected to excessive mechanical stress
Solution Approach 1:
The invention changes the key parameter from spring force magnitude to geometric distance between components. By adjusting the distance between the roller support and counter bearing, the system achieves optimal hose compression without excessive force, thereby reducing mechanical stress on the hose while maintaining functional compression.
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 minimizes mechanical stress on hoses, ensures consistent pump pressure, and reduces maintenance efforts by allowing for easy adjustment of the gap size between the counter bearing and squeezing elements, extending the service life of both the pump and hoses.
Implementation Method 1
The conical positioning surface (4b) of the counter bearing (4) is supported against a complementary-shaped support surface (5) on the housing (2)
Implementation Method 2
prestressed in the direction of the central part by means of a spring
Implementation Method 3
the hose being pressed against the active surface of an abutment by means of squeezing rollers in order to pump the medium in the convey the hose further in the conveying direction
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a peristaltic pump (1) for conveying a medium conducted in a hose, having a housing (2) and having a plurality of squeezing elements (3) which press the hose, so as to squeeze the hose, against the active surface (4a) of a counter bearing (4) and thereby convey the medium in the hose onward in the conveying direction, wherein the spacing (d) between the squeezing elements (3) and the active surface (4a) of the counter bearing (4) is variable. To be able, in a peristaltic pump of said type, to compensate as effectively as possible the production tolerances and material non-uniformities of the hose, and at the same time to keep the mechanical loading of the hose as low as possible during the operation of the pump, it is provided according to the invention that the counter bearing (4) has a conical or cone-shaped adjusting surface (4b) which is supported against a complementarily shaped support surface (5) on the housing (2), and that the spacing (d) between the squeezing elements (3) and the active surface (4a) of the counter bearing (4) can be adjusted by means of a movement of the counter bearing (4) relative to the housing (2) along the support surface (5).