Oil-Lubricated Rotary Vane Vacuum Pump Integrated Separation Housing
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Solution Overview
Problem
Oil-lubricated rotary vane vacuum pumps face challenges in oil separation and reprocessing, including inefficient separation of fine oil particles, potential for oil foam impairment, and maintenance complexities due to external separation device interfaces and connections.
Innovation Solution
The integration of two separating devices within the oil separation and reprocessing housing, with a fine separation device followed by a secondary separation device, eliminates the need for external interfaces and ensures step-like separation, enhancing oil separation efficiency and simplifying maintenance by allowing for convenient access and removal of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single separation device is used for oil-gas separation, then the device structure is simple, but the separation efficiency for fine oil particles is insufficient
Solution Approach 1:
The separation device is divided into multiple independent separation stages (coarse separation, fine separation, and post-separation) arranged in sequence. Each stage uses a different separation mechanism optimized for specific particle sizes, achieving high overall separation efficiency while maintaining modular simplicity
Solution Approach 2:
The separation process transitions from a single-stage approach to a multi-stage sequential arrangement in the gas flow direction. This dimensional expansion of the separation process allows each stage to specialize in different separation tasks, improving overall efficiency without excessive complexity
2Reliability
If external separation devices with interfaces and connections are used, then separation functionality is provided, but maintenance complexity increases due to multiple interfaces
Solution Approach 1:
Multiple separation functions (coarse separation, fine separation, post-separation) are merged into a single integrated housing structure. This consolidation eliminates the need for multiple external interfaces and connections, simplifying maintenance while maintaining comprehensive separation functionality
Solution Approach 2:
The single housing structure serves multiple separation functions simultaneously through internally arranged separation stages. This multi-functional design replaces what would otherwise require multiple separate devices, reducing interface complexity and easing maintenance
3Reliability
If oil separation and reprocessing device is housed separately from rotary vane housing, then oil separation is optimized, but overall device complexity increases
Solution Approach 1:
The oil separation and reprocessing device is merged with the rotary vane housing to form an integrated structure. The housing serves dual purposes as both the rotary vane enclosure and the oil separation chamber, eliminating the need for a separate external housing while maintaining optimized oil separation performance
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 configuration improves oil separation efficiency, reduces operational risks, and simplifies maintenance by providing a valve-free gas path and easy access to components, enhancing the overall performance and reliability of the vacuum pump.
Implementation Method 1
A fine separation can also be provided to separate oil and gas, with the gas stream being passed through a special filter mat, for example.
Implementation Method 2
A coarse separation of large oil drops can be provided by a corresponding filter element, as well as alternatively or in combination with gravity and/or impact separation by redirecting the gas-oil mixture and alternatively or in combination by slowing down the flow.
Implementation Method 3
A coarse separation of large oil drops can be provided by a corresponding filter element, as well as alternatively or in combination with gravity and/or impact separation by redirecting the gas-oil mixture
Implementation Method 4
The oil can also become dirty due to contact with the pumped medium or change as a result of possible chemical reactions. This results in preferential treatment of the oil after it leaves the blower area.
Implementation Method 5
The breakdown of oil foam can be provided in a further sub-process. Air bubbles trapped in the oil can enter the rotary vane chamber in the form of foam and impair the function of the pump.
Data Source
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AI summary
The invention relates to an oil-lubricated rotary vane vacuum pump (1) comprising a rotary vane unit (2) that includes a rotary vane chamber (5) and a rotary vane rotor (6), the vacuum pump further comprising an oil separation and reprocessing device (3) in which oil and gas that have penetrated into the rotary vane unit (2) are separated by a separation device (T1, T2) preferably formed by a filter element and/or a gravitational and/or impact separator (24) and/or a fine particle separator (25), preferably along with an oil foam decomposition device and/or with an oil cooler and/or with an oil pump; one or more monitoring and/or maintenance devices (37) are provided for said devices, and the oil separation and reprocessing device (3) is accommodated in an oil separation and reprocessing housing (13) that includes side walls (14, 15), a base (16), a top (17) and face walls (18, 19), the side walls (14, 15) extending transversely to a plane of rotation of the rotary vane rotor (6) and defining a longitudinal direction of the oil separation and reprocessing housing (13). In order to improve a rotary vane vacuum pump of said type in particular in respect of the oil separation process while providing the vacuum pump with a design that is favorable for handling and/or maintenance and/or manufacturing purposes, the gas successively flows through two separation devices (T1, T2) within the oil separation and reprocessing housing (13), and said two separation devices are both accessible for maintenance from a face wall (18).