Inlet Guide Vane Device Radial Motion Mechanism
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Solution Overview
Problem
The existing structure of inlet guide vane devices in centrifugal compressors is overly complex, leading to inefficient control of fluid flow due to complicated blade rotation mechanisms.
Innovation Solution
The proposed inlet guide vane device incorporates a central axis with a first base, guide sleeve, blade, second base, transmission disk, and actuator, featuring spiral grooves and guide posts that allow the blade to rotate effectively for opening or closing, driven by a rotating transmission disk and actuator, simplifying the mechanism and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the existing blade rotation structure is used, then the blade can rotate to control fluid flow, but the structure becomes too complicated resulting in poor efficiency
Solution Approach 1:
The device is divided into functionally independent modules: the guide sleeve with sliding sleeve for blade rotation control, the transmission disk with guide grooves for motion conversion, and the actuator for power input. Each module performs a specific function, simplifying the overall structure while maintaining control efficiency.
Solution Approach 2:
Instead of directly rotating the blade through a complex mechanism, the invention inverts the approach by using linear motion of the guide sleeve (controlled by the actuator through the transmission disk) to drive the blade rotation through the spiral grooves. This indirect approach simplifies the rotation mechanism.
2Adaptability or versatility
If a complicated blade rotation structure is used, then the blade can be controlled to open or close, but the mechanism requires more power and has lower efficiency
Solution Approach 1:
The guide sleeve acts as an intermediary between the actuator and the blade. The actuator drives the transmission disk, which moves the guide sleeve linearly, and the guide sleeve's linear motion is converted to blade rotation through the spiral grooves. This intermediary mechanism reduces the power required for direct blade rotation.
Solution Approach 2:
The system uses dynamic motion conversion: the actuator produces rotational motion, the transmission disk converts it to linear motion of the guide sleeve, and the spiral grooves convert the linear motion back to rotational motion of the blade. This dynamic conversion optimizes power usage and improves efficiency.
3Productivity
If the existing structure is used, then the blade can rotate, but the overall performance of the centrifugal compressor is reduced
Solution Approach 1:
The transmission disk serves multiple functions: it transmits power from the actuator, converts rotational motion to linear motion through its guide grooves, and provides a mounting structure for the guide sleeve. This multi-functionality reduces the number of components needed, simplifying the device while improving overall compressor 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 design enhances the stability and efficiency of fluid flow control by allowing multiple blades to rotate with less power, improving the overall performance of the centrifugal compressor.
Implementation Method 1
The guide sleeve is disposed on the first support groove in a manner that the guide sleeve is capable of moving along the radial direction
Implementation Method 2
The outer surface of the shaft has two spiral grooves. The blade is rotatably disposed through the through hole of the guide sleeve. The two spiral grooves match the upper guide post and the lower guide post respectively
Implementation Method 3
The actuator is connected to the transmission disk for driving the transmission disk to rotate
Implementation Method 4
When the centrifugal compressor operates, the impeller rotates in a high speed so that the airflow inside thereof rotates accordingly. By the impact of the centrifugal force generated by the rotation of the impeller, the fluid is driven to the diffuser behind
Data Source
AI summary
An inlet guide vane device having a central axis comprises a first base, a guide sleeve, a blade, a second base, a transmission disk, and an actuator. The first base has at least one first support groove and at least one guide groove. The first support groove extends along a radial direction of the central axis, and the at least one guide groove is located in the first support groove. The guide sleeve is disposed on the first support groove in a manner that the guide sleeve is capable of moving along the radial direction. The guide sleeve has a sliding sleeve, an upper guide post and a lower guide post, the sliding sleeve has a through hole extending along the radial direction. The upper guide post and the lower guide post pass through the sliding groove, and the lower guide post is movably disposed on the guide groove.