Guide Claw Support With Resilient Mounting for Pump Resonance Control
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Solution Overview
Problem
Pumps in sewage and wastewater systems with submersible pumps face challenges in maintaining reliability and energy efficiency when using variable frequency drives due to vibrations caused by resonances, which limit the available speed range and increase downtime and costs.
Innovation Solution
A pump support system with a guide claw and resilient elements that allows for variable rotational speeds without exciting resonances, using a combination of non-resilient and resilient components to alter the natural frequencies of the pump, ensuring a broad frequency range operation without vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pump is rigidly connected to the base part using gravity to create contact force, then the pump support structure is simple and reliable, but vibrations occur due to resonances when operating with variable frequency drives
Solution Approach 1:
The patent introduces resilient elements (springs or dampers) between the guide claw and the base part to provide beforehand cushioning against vibrations. These elements are pre-installed to absorb and dampen vibrational forces before they can propagate through the pump support structure, thereby reducing resonance effects when operating with variable frequency drives while maintaining support reliability.
Solution Approach 2:
The resilient elements act as intermediary components between the rigid base part and the pump support structure. These intermediaries transmit necessary mechanical support while filtering out harmful vibrations, allowing the system to maintain both structural reliability and vibration reduction simultaneously.
2Use of energy by moving object
If variable frequency drives are used to operate the pump in a wide speed range, then energy saving is improved, but resonances are excited that reduce reliability and increase downtime
Solution Approach 1:
The patent converts the harmful resonance vibrations into beneficial dampened oscillations by introducing resilient elements. These elements are designed to absorb the vibrational energy that would otherwise cause reliability issues, effectively converting the harmful resonance effect into a controlled energy dissipation mechanism that allows wide speed range operation without compromising reliability.
Solution Approach 2:
By pre-installing resilient elements in the pump support structure, the system is prepared beforehand to handle vibrational forces that will occur during variable speed operation. This beforehand cushioning enables the pump to operate across a wide speed range with energy-saving VFD control while maintaining reliability through pre-configured vibration mitigation.
3Object-affected harmful factors
If the pump is rigidly supported to avoid vibrations, then vibration levels are reduced, but the natural frequencies are excited at reduced rotational speeds limiting the speed range
Solution Approach 1:
The patent transitions from a static rigid support system to a dynamic resilient support system. The resilient elements allow the support structure to adapt its stiffness characteristics based on operating conditions, enabling the system to maintain low vibration levels across a broader speed range by dynamically responding to different rotational speeds and vibration frequencies rather than being fixed in a rigid configuration.
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
Enables the full desired variable rotational speed range to be used without resonances, enhancing the reliability and energy-saving potential of the pump system by mitigating vibrations and maintaining operational stability.
Implementation Method 1
an upper support part having a support surface at the upper end configured for receiving said first guide member and supporting said first guide member in an abutting engagement with a resilient element positioned in between the upper support part and the first guide member, so that when gravity acts on the pump, the guide claw is resiliently supported at support surface of the upper support part
Implementation Method 2
In the lower position, the pump is via the guide claw rigidly connected in upper and lower contact points on the base using the gravity to create the contact force
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
In some particular preferred embodiments, the invention relates to the field of pumping stations for sewage and wastewater with submersible pumps mounted in the bottom of the wells. To allow easy cleaning and maintenance of the pumps without getting in contact with the dirty water the solution is a system for easy lifting the pump out of the well and lower it again called an auto coupling.