Rotating Device Variable Guide Vane Modular Assembly
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Solution Overview
Problem
Conventional variable guide vane modules in rotating devices, such as centrifugal compressors, face challenges in precise control of vane opening, size constraints, and lengthy disassembly/reassembly processes, leading to pressure loss and inconvenient maintenance due to complex link structures and exposure of actuator components.
Innovation Solution
A rotating device with a variable guide vane module designed as separable components, including a vane case and a shroud case, where the first module features a main shaft, main link arm, control arm, and pivot, and the second module includes a control ring and vanes, allowing for modular assembly and disassembly, and internal link visibility with a housing cover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the VGV module is designed as a integrated structure with ring connected to rotating arm, then the vane angle control is achieved, but the module size increases and disassembly/reassembly becomes time-consuming
Solution Approach 1:
The VGV module is divided into separable components: the actuator assembly (with rotating arm and link) can be detached from the diffuser assembly (with ring and vanes). This segmentation allows the actuator to be removed separately for maintenance without disassembling the entire VGV module, significantly reducing maintenance time and simplifying operations.
2Volume of moving object
If the rotating arm is exposed on the outside for actuator connection, then the actuator can be connected, but the overall module size cannot be reduced
Solution Approach 1:
The rotating arm and link are positioned inside the housing cavity, nested within the overall module structure. The actuator connects to the rotating arm through the housing cover opening, allowing compact integration without exposing the rotating arm externally. This nesting reduces the module's external dimensions while maintaining actuator connectivity.
3Ease of repair
If the VGV module is completely disassembled for link examination, then the link can be inspected, but the maintenance process becomes time-consuming and inconvenient
Solution Approach 1:
The link is extracted as a separately accessible component. The housing cover can be removed to expose the link for inspection and maintenance, allowing technicians to examine and service the link without completely disassembling the entire VGV module. This extraction principle significantly reduces maintenance time and improves repair convenience.
4Measurement precision
If the ring is connected to the end of the rotating arm, then the vane angle can be controlled, but precise control of vane opening becomes difficult
Solution Approach 1:
The link is designed with a specific geometry and connection points that pre-establish the correct mechanical relationship between the rotating arm and ring. This preliminary design ensures that when the actuator rotates the arm, the ring follows a precise trajectory, enabling accurate control of vane opening angles without requiring complex real-time adjustments.
Data Source
AI summary
A rotating device includes a housing; a variable guide vane module provided on a surface of the housing; and a housing cover covering the variable guide vane module. The variable guide vane module includes a first module, which comprises a vane case that has a cylinder shape and that is provided in the housing, and further comprises a first link that is provided on the vane case; and a second module, which comprises a shroud case that is seated between the housing and the vane case, and further comprises a second link that is provided in the shroud case and is configured to be driven in accordance with driving of the first link. The variable guide vane module is configured to be separable into at least two modules, including the first module and the second module.