Vacuum Liquid Processing With Coupled Gear Pump Flow Control
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Solution Overview
Problem
Existing systems for processing liquids under vacuum in a flow-through manner lack satisfactory control over feed-flow and involve complex control systems, making them unreliable and inefficient, particularly in filtering oil used in mechanical and electrical systems where contamination and cavitation pose significant challenges.
Innovation Solution
A device utilizing a multiple-stage gear pump system with a first stage for controlling feed-flow and a second stage for retrieving processed liquid, operating under vacuum pressure, which ensures adequate throughput and prevents overpressure without additional control elements, by maintaining a fixed displacement rate and mechanical coupling for enhanced operational safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If known systems for processing liquid under vacuum are used, then liquid processing under vacuum is achieved, but control over feed-flow is unsatisfactory and control systems become complex
Solution Approach 1:
The patent combines the feed pump and discharge pump into a single integrated unit with a common casing. The feed pump delivers liquid to the process chamber while the discharge pump removes processed liquid, and both pumps are mechanically coupled through a shared drive mechanism. This merging eliminates the need for separate complex control systems for each pump, reducing overall device complexity while maintaining reliable flow control under vacuum conditions
Solution Approach 2:
The patent introduces a mechanically coupled drive system as an intermediary between the power source and the two pumps. This intermediary mechanism synchronizes the operation of the feed pump and discharge pump, ensuring coordinated flow control without requiring independent electronic control systems. The mechanical coupling acts as a mediator that simplifies the control architecture while maintaining precise flow management
2Ease of operation
If complex control systems are used for flow control, then flow control precision may improve, but device complexity and operational reliability worsen
Solution Approach 1:
The integrated pump system is designed to self-regulate flow under vacuum conditions through its mechanical configuration. The mechanically coupled feed and discharge pumps automatically balance each other's operation, with the system self-adjusting to maintain proper flow rates without requiring complex external control systems. This self-service mechanism simplifies operation while reducing device complexity
3Reliability
If vacuum processing is implemented, then liquid filtration is improved, but risk of overpressure and cavitation increases
Solution Approach 1:
The patent ensures continuous operation of both feed and discharge pumps under vacuum conditions, maintaining constant liquid flow through the process chamber. This continuous action prevents pressure fluctuations that could lead to cavitation or overpressure conditions. The mechanically coupled pumps work continuously and synchronously, ensuring stable vacuum filtration while eliminating the harmful effects of intermittent operation
Solution Approach 2:
The mechanical coupling between the feed pump and discharge pump acts as an intermediary that balances pressure conditions in the system. This coupling ensures that the discharge pump continuously removes processed liquid at a rate that matches the feed pump's delivery, preventing overpressure buildup in the process chamber and eliminating cavitation risks by maintaining stable vacuum conditions throughout operation
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 solution provides reliable and simplified processing of liquids under vacuum, effectively controlling feed and discharge flows to maintain a stable vacuum environment, preventing overpressure and ensuring efficient filtration of oil, thus enhancing equipment reliability and extending its lifespan.
Implementation Method 1
vacuum generating means communicating with a gas filled portion of the process chamber via a vacuum port for reducing the pressure therein to a vacuum-pressure
Implementation Method 2
processing is performed at a vacuum-pressure below the pressure of the liquid upstream of the device and below the pressure of the liquid downstream of the device
Data Source
AI summary
A device for processing of a liquid that includes a device-input for receiving the liquid to be processed at an input-pressure, a device-output for returning the processed liquid at an output-pressure, a process chamber having a chamber-inlet and a chamber-outlet with the chamber-inlet being connected to the device-input via a feed-line, and the chamber-outlet being connected to the device-output via a discharge-line. The feed-line includes a pump for increasing the pressure of the liquid from the input-pressure to a feed-pressure at the chamber-inlet, and the discharge-line includes a back-pressure mechanism adapted to maintain a discharge-pressure at the chamber-outlet upstream of the back-pressure mechanism at an excess-pressure above the output-pressure, and to reduce the pressure of the liquid from the discharge-pressure to the output-pressure downstream of the back-pressure mechanism. The pump in the feed-line is a first stage of a multiple-stage gear pump. The back-pressure mechanism in the discharge-line is a second stage of the multiple-stage gear pump. The second stage is mechanically coupled to the first stage.