Submersible Pump Dual Sealing Ring Particle Extraction
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Solution Overview
Problem
Submersible pumps experience vibrations and flow noise due to fragmented solid matter and air entering the impeller cavity, which can also compromise the shaft seal's functionality by allowing solid particles to penetrate.
Innovation Solution
A dual sealing ring system is implemented, where the impeller-side sealing ring has catchers to transport solid matter and air out via a recess on the pump-housing-side sealing ring, preventing them from entering the impeller cavity and reducing noise and shaft seal contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single-channel impeller with a large internal cavity is used, then the pump can effectively handle waste water with solid matter, but solid particles and air can penetrate into the impeller cavity causing vibrations and flow noise
Solution Approach 1:
The invention extracts and removes the harmful elements (solid particles and air) from the impeller cavity by providing a dedicated removal channel with a suction port and impeller vane that actively draws these contaminants out of the cavity, preventing them from causing vibrations and noise while preserving the impeller's main pumping function
2Reliability
If the impeller cavity is left open to the axial end, then air and solid particles can be evacuated, but these particles can still reach the shaft seal and compromise its functionality
Solution Approach 1:
The invention introduces an intermediary structure - the impeller vane with its leading edge and removal channel - that acts as a mediator between the impeller cavity and the external environment. This intermediary actively transports particles and air through a controlled path that bypasses the shaft seal region, allowing evacuation without direct exposure to the seal
3Productivity
If a cutting device is added to fragment solid matter, then blockage of the impeller is prevented, but the fragmented particles can still enter the impeller cavity and cause noise and vibrations
Solution Approach 1:
The invention extracts the harmful fragmented particles from the impeller cavity by providing a dedicated removal channel that actively draws these particles out through the suction port, preventing them from accumulating in the cavity and causing vibrations and noise while maintaining the cutting device's blockage prevention function
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 solution effectively reduces impeller oscillations and noise, while protecting the shaft seal from solid particles, ensuring smooth pump operation and preventing contamination.
Implementation Method 1
a seal which seals the impeller with respect to a stationary part of the pump housing... This seal in particular prevents a penetration of solid mater and contamination into at least one cavity situated in the inside of the impeller
Implementation Method 2
the sealing ring on the pump housing side, which is to say the pump-housing-side seal, according to the invention comprises at least one recess for leading away solid particles
Implementation Method 3
the gap located between the sealing ring arranged on the impeller side and the pump-housing-side sealing ring essentially bearing on this, is usefully dimensioned and/or designed in a manner such that solid matter particles can penetrate into this gap and then at the recess formed on the outer sealing ring arranged on the pump housing side can exit out of the seal
Data Source
AI summary
A submersible pump includes an impeller (8) arranged in a pump housing (2). A seal (22) seals the impeller (8) with respect to a stationary part of the pump housing (2). The seal (22) includes a sealing ring (24) arranged on the impeller side. The sealing ring engages in a second sealing ring (26) arranged on the pump housing side. The sealing ring (26) on the pump housing side has at least one hole (28) for discharging solid particles from the impeller (8).