Geared Compressor Phase Adjustment Jig for Low-Torque Alignment
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Solution Overview
Problem
Large geared compressors pose a challenge in accurately adjusting the phase of their rotating systems during maintenance due to the high torque required, making it difficult to perform precise adjustments.
Innovation Solution
A phase adjustment system and jig that allows for easy and accurate phase adjustment by using a main jig gear that meshes with the drive gear, enabling rotation of the compressor system with smaller torque, and includes features like a frame attachable to the gear casing, a handle for rotating the main jig gear, and auxiliary gears to reduce rotation speed and increase torque, facilitating manual adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a large geared compressor is used, then compression capability is improved, but the weight of the rotating system increases making phase adjustment difficult
Solution Approach 1:
A phase adjustment jig is introduced as an intermediary device between the operator and the heavy rotating system. The jig includes a main jig gear that meshes with the drive gear, allowing the operator to rotate the heavy rotating system through the jig's handle rather than directly, making phase adjustment feasible despite the high weight and torque requirements
Solution Approach 2:
The phase adjustment function is segmented from the main compressor operation. The detachable frame structure allows the adjustment jig to be separated into components (frame, main jig gear, handle) that can be independently handled and assembled, making the adjustment process manageable despite the overall system's high torque requirements
2Power
If the rotating system is made larger for high compression, then compression performance is improved, but the torque required for phase adjustment increases
Solution Approach 1:
The main jig gear acts as a mechanical intermediary that transmits rotational force from the handle to the drive gear. By meshing with the drive gear through this intermediary mechanism, the operator can apply small torque at the handle which is then transmitted to rotate the heavy rotating system, effectively reducing the direct torque requirement for phase adjustment
3Ease of manufacture
If the driving source stops for maintenance, then maintenance can be performed, but the gear and pinion become non-rotatable
Solution Approach 1:
The phase adjustment jig serves as a temporary intermediary rotation mechanism that enables the gear and pinion to be rotated during maintenance when the driving source is stopped. The detachable frame allows the jig to be attached to the gear casing, providing the necessary mechanical interface to rotate the stationary rotating system for phase adjustment purposes
4Measurement precision
If direct rotation of the drive gear is attempted, then phase adjustment is possible, but high torque makes fine adjustment difficult
Solution Approach 1:
The main jig gear and handle combination acts as a torque-reducing intermediary mechanism. The handle provides a large rotational lever arm that reduces the torque required to rotate the drive gear, enabling operators to perform fine phase adjustments with minimal force while maintaining measurement precision through the meshing gear mechanism
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
Enables easy and high-accuracy phase adjustments of the rotating system with reduced torque requirements, allowing operators to perform fine adjustments efficiently.
Implementation Method 1
a main jig gear that is rotatably provided with respect to the frame and meshes with the drive gear in a state where the frame is fixed to the gear casing
Data Source
AI summary
A phase adjustment system 100 for a geared compressor 1 includes a phase adjustment jig 50 that is to be detachably provided in the geared compressor 1. The geared compressor 1 includes a drive gear 4 fixed to a drive shaft and having a largest outer diameter among a plurality of gears; a driven gear having a smaller diameter than a diameter of the drive gear 4 and meshing with the drive gear 4; and a gear casing accommodating the drive gear 4 and the driven gear. The phase adjustment jig 50 includes a fifth jig gear 66 that meshes with the drive gear 4 in a state where a frame 51 is fixed to the gear casing; and a manually rotatable handle 70 that is configured to rotate the fifth jig gear 66.