Rotary Pump Vibration Damping via Elastic Molding
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Solution Overview
Problem
Existing centrifugal motor pumps, particularly small ones, face challenges in effectively reducing airborne and structure-borne noise emissions due to the complexity and inefficacy of known vibration-damping measures, which are difficult to implement and require precise component precision.
Innovation Solution
The intermediate space between the motor stator and the pump and motor housing is partially or completely filled with an elastic molding material, providing a decoupling effect that significantly reduces noise emissions by eliminating the need for damping on individual components and avoiding pressure-induced changes in damping properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If vibration-damping measures are implemented on individual components (bearings, splitting head), then noise emissions are reduced to some extent, but the construction becomes technically very complex and difficult to implement in small pumps
Solution Approach 1:
The patent merges multiple vibration-damping functions into a single integrated elastic molding material that fills the intermediate space between the motor stator and pump housing. This consolidates what would otherwise require separate damping elements on multiple components (bearings, splitting head) into one unified damping structure, thereby reducing construction complexity while maintaining noise reduction effectiveness.
Solution Approach 2:
The elastic molding material serves multiple functions simultaneously: it acts as a vibration-damping element, a sealing medium, and a structural support for the motor stator. This multi-functionality eliminates the need for separate specialized components, simplifying the overall construction while effectively addressing noise emissions across different operating conditions.
2Object-affected harmful factors
If vibration-damping measures are implemented on individual components, then noise emissions are reduced, but the requirement for component precision increases
Solution Approach 1:
The patent changes the state of the damping medium from solid/rigid components to a compliant elastic molding material. This parameter change allows the damping system to adapt to variations in component dimensions and assembly tolerances, reducing the need for high manufacturing precision while maintaining effective vibration damping and noise reduction.
3Object-affected harmful factors
If traditional damping elements are used, then damping is provided at specific locations, but changes in damping properties occur as a function of system pressure
Solution Approach 1:
The patent employs an elastic molding material whose damping properties are inherently stable across varying pressure conditions. The material's viscoelastic characteristics maintain consistent damping effectiveness regardless of system pressure changes, eliminating the reliability issues associated with traditional damping elements that may compress or deform under pressure.
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 solution achieves a high degree of noise reduction with simplified construction, allowing for less precise components and potentially more cost-effective engine technologies, while maintaining effective noise mitigation across varying system pressures.
Implementation Method 1
at least one vibration-damping element being arranged in the intermediate space which supports the motor stator in the pump and motor housing
Implementation Method 2
the intermediate space is partially or completely filled by an elastic molding material as a vibration-damping element
Data Source
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AI summary
The invention relates to a rotary pump, particularly in a wet running design, the electric motor rotor (7) of which drives the pump impeller (5) via the shaft (21) thereof and is surrounded by the motor stator (17). The motor stator and the pump impeller are surrounded by the pump and motor housing (1, 3), forming an intermediate space (22, 25), wherein at least one vibration-damping element (10, 12, 28) is disposed in the intermediate space and supports the motor stator (17) in the pump and motor housing.