Compressor Pressure Valve Isolation for Vane Stability
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Solution Overview
Problem
The pressure-regulating valve in compressors is affected by dynamic pressure from the oil separator, leading to inaccurate opening and closing based on static pressure, which affects the projection performance of vanes and compressor startup efficiency.
Innovation Solution
A pressure-adjusting valve is integrated into the oil separator, independent of the dynamic pressure, to accurately control the pressure of the vane back-pressure space according to the static pressure of the discharge section, ensuring proper vane projection and compressor stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pressure-regulating valve is placed in the discharge section to control vane back-pressure, then the valve can respond to pressure changes, but the valve is affected by dynamic pressure from the oil separator causing inaccurate opening and closing
Solution Approach 1:
A communication path is introduced as an intermediary between the discharge section and the vane back-pressure space. This path allows static pressure to be transmitted to the pressure-regulating valve while isolating it from the dynamic pressure fluctuations in the discharge section, enabling accurate pressure regulation without being affected by harmful dynamic pressure effects.
Solution Approach 2:
The system is segmented into distinct functional zones: the discharge section handles high-pressure gas flow, the communication path transmits only static pressure information, and the vane back-pressure space receives regulated pressure control. This segmentation isolates the pressure-regulating valve from dynamic pressure influences while maintaining effective pressure control.
2Loss of energy
If the compressor is maintained in a resting state, then energy consumption is reduced, but the inner pressure in the discharge section is lowered causing vane separation from the cylinder inner circumferential face
Solution Approach 1:
The pressure-regulating valve maintains a predetermined back-pressure in the vane back-pressure space even during resting states. This preliminary action ensures that when the compressor starts, the vanes are already in contact with the cylinder inner circumferential face, eliminating startup delays and preventing chattering without requiring continuous high-power operation.
Solution Approach 2:
The system changes the pressure parameter in the vane back-pressure space from variable (following discharge pressure) to a maintained predetermined level. This parameter change ensures consistent vane projection force during both operation and idle states, preventing vane separation during resting periods while maintaining reliable contact during operation.
3Reliability
If the back-pressure of the vanes is increased to prevent separation, then vane projection performance improves, but the compression room pressure acting on the vanes causes chattering
Solution Approach 1:
The communication path acts as a mediator that transmits only static pressure from the discharge section to the vane back-pressure space, filtering out dynamic pressure fluctuations. This allows the back-pressure to be increased sufficiently for reliable vane projection without introducing the dynamic pressure variations that cause chattering.
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 ensures accurate and reliable operation of the pressure-regulating valve, improving vane projection performance and reducing startup time by isolating the valve from dynamic pressure influences, thus enhancing compressor efficiency and stability.
Implementation Method 1
a centrifugal oil separator... when compressed gas is ejected from the compressor main body
Implementation Method 2
a pressure-adjusting valve configured to adjust the pressure of the vane back-pressure space according to the pressure of the discharge section
Implementation Method 3
Each of the vanes is projectable from the outer circumferential face of the rotor by back-pressure
Data Source
AI summary
A compressor includes a main body having in a housing a vane back-pressure space configured to project a vane forming a compression room for compressing gas, and a centrifugal oil separator. A discharge section to which the gas from the oil separator is ejected is formed in the housing, and the oil separator includes a pressure-adjusting valve configured to adjust pressure of the vane back-pressure space according to pressure of the discharge section. The pressure-adjusting valve is arranged in the oil separator without being affected by the gas ejected from the oil separator.