Screw Liquid Ring Pump Integrated Macerator Design
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Solution Overview
Problem
Conventional liquid ring pumps with integrated grinders experience reduced pumping efficiency due to the macerating mechanism hindering sewage flow.
Innovation Solution
The design incorporates a rotary cutter with curved wings matching the helical screw rotor's wings and a stationary cutter with opposing grooves, enhancing grinding while facilitating fluid flow by minimizing clogging and optimizing the cutting mechanism to improve efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional macerator with stationary and rotating cutters is used, then macerating ability is improved, but pumping efficiency deteriorates due to flow hindrance
Solution Approach 1:
The rotary cutter is merged with the helical screw rotor into a single integrated component, eliminating the need for separate macerating mechanism parts. This integration removes flow hindrances caused by separate stationary and rotating cutters while maintaining macerating ability through the helical wings that perform both pumping and cutting functions
Solution Approach 2:
The helical screw rotor is designed to perform multiple functions simultaneously: it acts as both the pumping element (moving sewage through the pump) and the macerating element (cutting larger pieces of material). The helical wings on the rotor provide both the pumping action and the cutting action, eliminating the need for dedicated separate components
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 maintains macerating ability while significantly improving pump efficiency and capacity, as demonstrated by tests showing a 10-25% increase in fluid volume effect and 8-15% increase in pumped fluid volume across varying vacuum levels compared to traditional designs.
Implementation Method 1
a pump housing with an inlet and an outlet and an, inside the housing, rotating helical screw rotor
Implementation Method 2
The rotary cutter 12 is provided with curved wings 21 corresponding to the wings 16 of the helical screw 4 and stretching from a front part of the cutter and ending in a rear part complimentary to a front part of the screw on to which it is attached
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Screw type liquid ring pump (1 ) with an integrated grinder or macerator (2), including a pump housing (3) with an inlet (5) and an outlet (7) and an, inside the housing, rotating helical screw rotor (4), which rotor at one end, the inlet end of the pump housing is provided with the grinder (1 1) and at the other end, the outlet end of the pump housing is communicating with a pressure chamber (6). The screw rotor is provided on a shaft (18) connected (not shown) to a driving unit in the form of a motor, preferably an electric motor. The grinder includes a rotary cutter (12) attached to the inlet end of the helical screw (4) shaft and a stationary cutter (13) attached to a grinder housing part (15), each cutter being provided with cutting tools or knives, whereby the rotary cutter (12) is freely rotating within the stationary cutter (13) when the pump is running. Each tool of the rotary cutter (12) has a cutting edge or knife (20) provided on a curved wing (21 ) such that the cutter is shaped like a pump impeller contributing to the pumping of the liquid through the macerator.