What is water ring vacuum pump?
What is water ring vacuum pump?
A water ring vacuum pump, also known as a liquid ring vacuum pump, is a type of positive displacement pump that uses a liquid (typically water) to create a vacuum. It works by rotating an impeller eccentrically within a cylindrical casing partially filled with liquid, creating a rotating “liquid ring” that traps and compresses gases or vapors. This liquid ring acts as a sealant, preventing gas leakage and ensuring efficient pumping action.
This video demonstrates the working principle of a liquid ring vacuum pump, showing how the impeller and liquid ring create a vacuum:
Here’s a more detailed explanation:
- Structure:The pump consists of a cylindrical casing, an impeller with vanes, and a liquid (usually water).
- Working Principle:
- The impeller is positioned off-center within the casing. When the impeller rotates, the liquid is forced against the casing walls due to centrifugal force, forming a rotating liquid ring.
- As the impeller rotates, the space between the vanes and the liquid ring changes, creating alternating suction and compression chambers.
- Gases are drawn into the pump through the suction port, trapped within the changing chamber volumes, and then compressed as the impeller rotates further.
- Finally, the compressed gases are expelled through the discharge port.
- The impeller is positioned off-center within the casing. When the impeller rotates, the liquid is forced against the casing walls due to centrifugal force, forming a rotating liquid ring.
- Key Features:
- Liquid Seal: The liquid ring acts as a dynamic seal, preventing gas leakage and enabling the pump to handle wet or even slightly dirty gases.
- Self-Priming: Water ring vacuum pumps are self-priming, meaning they can handle some liquid carryover without damaging the pump.
- Versatile: They are used in various industries, including chemical, food and beverage, and wastewater treatment.
- Liquid Seal: The liquid ring acts as a dynamic seal, preventing gas leakage and enabling the pump to handle wet or even slightly dirty gases.
This video explains the structure and components of a liquid ring vacuum pump:
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