Twin-Screw Compressor Slide Valve With Integrated Pulsation Attenuation
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Solution Overview
Problem
Twin-screw compressors experience air flow pulsations on the suction side, leading to vibrations and noise due to discontinuous inter-tooth volumes, which existing technologies have not effectively addressed through the structure of slide valves.
Innovation Solution
A slide valve with cavities and passages configured to connect with an external fluid, reducing air flow pulsations on the suction side by attenuating energy, thereby alleviating vibrations and noise without additional attenuation devices or extra pressure loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the slide valve structure is used for load regulation, then the amount of air delivered can be regulated, but air flow pulsations cause vibrations and noise
Solution Approach 1:
A pulsation attenuation device is introduced as an intermediary component between the suction cavity and the slide valve. This device contains a pulsation attenuation cavity and multiple attenuation passages that serve as a mediator to smooth out air flow pulsations before they reach the slide valve, thereby reducing vibrations and noise while maintaining load regulation capability
Solution Approach 2:
The slide valve structure is modified by adding cavities and passages that change the flow parameters. The pulsation attenuation passages alter the air flow characteristics by creating a more gradual pressure change, transforming the pulsating flow into a smoother flow regime that reduces harmful vibrations and noise
2Object-affected harmful factors
If pulsation attenuation design is added to the slide valve, then air flow pulsations can be reduced, but device complexity increases
Solution Approach 1:
The pulsation attenuation function is merged with the existing slide valve structure. The attenuation passages are integrated within the slide valve body itself, combining the load regulation function and pulsation attenuation function into a single unified component, thereby reducing device complexity while achieving pulsation reduction
Solution Approach 2:
The slide valve is designed to perform multiple functions simultaneously: load regulation through axial movement and pulsation attenuation through the integrated cavity and passage structure. This multi-functionality eliminates the need for separate pulsation attenuation devices, maintaining simplicity while reducing air flow pulsations
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 proposed slide valve design effectively reduces overall air flow pulsations, alleviates vibrations and noise, and improves the running reliability of twin-screw compressors at various loads by absorbing energy from air flow pulsations without causing additional pressure loss.
Implementation Method 1
the slide valve has at least one passage configured to fluidly connect the cavity with an external fluid to reduce air flow pulsations on the suction side of the twin-screw compressor
Implementation Method 2
By attenuating the energy of air flow on a suction side of the twin-screw compressor to reduce the air flow pulsations on the suction side, the overall air flow pulsation level is lowered
Data Source
Figure 1A
Figure 1B~1C
Figure 1D
AI summary
The present application provides a slide valve, wherein the slide valve is configured to regulate a load of a twin-screw compressor. The slide valve comprises a slide valve body, wherein the slide valve body has a connecting end and a free end, the connecting end is configured to connect to a slide valve connecting rod of the twin-screw compressor, and the slide valve is driven to slide by the slide valve connecting rod. A cavity is formed in the free end of the slide valve body, and the slide valve has a passage configured to fluidly couple the cavity with an external fluid to reduce air flow pulsations on a suction side of the twin-screw compressor and thereby reduce overall air flow pulsations in the twin-screw compressor.