Liquid Ring Pump

Simple SummaryContent extracted from patent full text and abstract with AI.

This patent describes an improved liquid ring pump designed for handling gaseous working media. The invention introduces a novel configuration for the impeller and delivery chambers, utilizing inclined bottom walls that direct gas and liquid flow more efficiently toward specialized outlet and inflow openings. The arrangement enables effective separation of the gas and liquid, allows for precise control of suction and discharge, and significantly reduces unwanted mixing, noise, and energy loss. The design also supports advanced features such as integrated check valves and centrifugal gas-liquid separators, and makes it possible to use advanced sealing and cooling fluids such as poly-alpha-olefin.

Use CasesContent extracted from patent full text and abstract with AI.

• Industrial vacuum systems for processes requiring safe and efficient gas handling.
• Chemical and pharmaceutical equipment for gas transfer or reactor support, where explosion risk or gas purity is a concern.
• Environmental engineering applications, such as vapor recovery or air pollution control systems.
• Laboratory and research setups where low vibration and low noise gas pumping are needed.
• Compressor systems for specialized gases in manufacturing or analysis applications.
• Any process industry requiring pumps that can handle explosive or thermally sensitive gases safely.

BenefitsContent extracted from patent full text and abstract with AI.

• Lower operating noise and reduced risk of explosions due to minimal friction and improved flow paths.
• Ability to achieve much lower suction pressures, getting closer to the vapor pressure of the ring liquid (even under 1 mbar with special fluids), enabling high-vacuum applications.
• Enhanced separation of pumped gas and ring fluid, reducing contamination and loss of pump liquid.
• Improved efficiency by minimizing mixture formation and energy loss during operation.
• More reliable and safer handling of heat or explosion-sensitive gases thanks to superior cooling and absence of internal sparking.
• Flexible design with integrated check valves and optional centrifugal separators caters to a wide range of process needs.
• Potential for lower maintenance due to reduced mechanical wear and more straightforward operation.

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The invention relates to a liquid ring pump (1), which has a pump housing (2), which surrounds a pump chamber (3), into which a pump liquid (14) is filled in the normal operating state. Furthermore, the liquid ring pump (1) has an impeller (4) for conveying a gaseous working medium, which impeller is arranged within the pump chamber (3) and can be rotated about an axis of rotation (6). The impeller (4) has, on the outer circumference thereof, a number of conveying chambers (8) separated from each other at least in the circumferential direction. The impeller (4) also has, for each conveying chamber, an outlet opening (12) associated with the conveying chamber (8) for fluidically connecting the conveying chamber (8) to a pressure region (20) of the pump chamber (3), the outlet opening being formed locally in a bottom wall (24) of the impeller (4) that delimits the conveying chamber (8) radially inside. The bottom wall (24) extends along the axis of rotation (6) on both sides of the outlet opening (12), at least in some portions with a tilt with respect to the axis of rotation (6), toward the outlet opening (12). Said outlet opening (12) is arranged at a point of the conveying chamber (8) having the smallest radial distance from the axis of rotation (6).