Reversible Grinder Pump Cutting System
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Solution Overview
Problem
Current grinder pump systems face issues with significant vibration and torquing during operation, inefficiency in grinding solids, and clogging, especially in smaller fractional horsepower pumps, which limits their use in spaces like basement bathrooms.
Innovation Solution
A reversible grinder pump with a unique cutting system featuring a cutter plate with pairs of angled openings and a cutter blade with triangular, prism-shaped cutting edges, allowing efficient cutting of solids regardless of rotation direction, reducing motor torque and preventing clogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a smaller fractional horsepower grinder pump is used to fit limited spaces, then the pump can be installed in small spaces like basement bathrooms, but the pump becomes less efficient at grinding solids and more prone to clogging
Solution Approach 1:
The cutter blade is segmented into multiple pruning blade elements arranged radially around the drive shaft. These multiple smaller cutting elements work together to efficiently grind solids even in a compact pump configuration, resolving the contradiction between small pump size and grinding efficiency
Solution Approach 2:
The cutter blade elements have asymmetric geometry with specific cutting edge angles and orientations designed to optimize cutting performance in the limited space of a fractional horsepower pump. The asymmetric design allows efficient solid grinding despite the reduced pump size
2Productivity
If a larger grinder pump is used to improve grinding efficiency, then the pump can handle solids more effectively, but the pump becomes difficult to use in locations where space is limited
Solution Approach 1:
The cutting system is divided into multiple radial pruning blade elements that provide comprehensive cutting coverage without requiring a large pump housing. This segmentation allows high grinding efficiency in a compact configuration
Solution Approach 2:
The cutting action is distributed across multiple radial dimensions rather than relying on a single large cutting element. This multi-dimensional cutting approach achieves high grinding efficiency while maintaining a compact pump footprint
3Productivity
If the grinder pump operates to grind solid materials, then the pump can process waste water with solids, but significant vibration and torquing occurs which impacts the longevity of the pump
Solution Approach 1:
The load is distributed across multiple radial pruning blade elements rather than a single cutting element. This segmentation balances the cutting forces and reduces vibration and torquing on the drive shaft, improving pump reliability while maintaining solid processing capability
Solution Approach 2:
The radial arrangement of pruning blade elements creates counterbalancing forces that offset vibration and torquing during operation. The symmetric radial distribution of cutting elements provides natural vibration damping, extending pump longevity
4Productivity
If the grinder pump operates with traditional cutting system, then the pump can process waste water, but clogging of the pump system occurs due to inefficient solid cutting
Solution Approach 1:
Multiple radial pruning blade elements work together to thoroughly grind solids into small particles that are less likely to cause clogging. The segmented cutting action ensures complete size reduction of solids, maintaining reliable waste water processing
Solution Approach 2:
The cutting system parameters including blade geometry, radial arrangement, and cutting speed are optimized to produce uniformly small solid particles. This parameter optimization ensures efficient solid breakdown and prevents clogging while maintaining processing capability
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 enhances the cutting efficiency of solids, reduces motor torque, and prevents clogging, making the pump suitable for small spaces like bathrooms and improving the longevity of the pump components.
Implementation Method 1
A lower portion of the reversible grinder pump includes a cutter plate and cutter blade which interact with waste water containing solids that enter the grinder pump to efficiently cut up the solids
Data Source
AI summary
A reversible grinder pump with cutter plate and cutter blade, wherein the cutter plate is attached to an inlet of the reversible grinder pump and is located adjacent to the cutter blade, wherein the cutter plate includes pairs of angled openings, wherein each of the pair of angled openings extends through the cutter plate and has a shape which is a mirror image of the other angled opening of the pair of angled openings, when viewed from above a surface of the cutter plate. The cutter blade of the reversible grinder pump contains a pair of triangular cross section, prism-shaped cutting edges, which are congruent to each other and reflective, extending in opposite directions from each other.