Rotor Disk Assembly Slip Prevention via Coupling Pins
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Gas turbines face issues with slip between rotor disks due to centrifugal forces and imbalance in the center of gravity, leading to vibrations and unreliable operation.
Innovation Solution
A rotor disk assembly with a tie rod and coupling pins that pass through the disks, along with a detection unit and control unit to adjust the weight and arrangement of coupling pins to align the center of gravity with the rotor shaft, preventing slip and ensuring balanced operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If rotor disks are pressed onto each other by a spindle bolt, then the rotor disks are fixed to each other, but a slip may occur between the rotor disks due to centrifugal force generated by rotation
Solution Approach 1:
The invention divides the single spindle bolt connection into multiple segmentation points by introducing several coupling pins distributed around the rotor disk assembly. This segmentation allows each pin to independently resist centrifugal forces acting on different sections of the rotor disks, preventing slip more effectively than a single centralized bolt connection.
Solution Approach 2:
The invention transitions from a single-axis spinal bolt connection to a multi-dimensional arrangement by positioning multiple coupling pins radially distributed around the rotor disks. This dimensional change creates a three-dimensional coupling structure that more effectively counteracts the centrifugal forces acting in multiple directions during rotation.
2Ease of operation
If the center of gravity of the rotor disks differs from that of the rotating shaft, then the rotor biasedly rotates, but this generates large vibrations and makes reliable operation difficult
Solution Approach 1:
The invention uses the coupling pins as adjustable counterweights to balance the rotor disk assembly. By strategically positioning and adjusting the mass distribution of the coupling pins, the system creates counterbalancing forces that offset the imbalance between the rotor disks' center of gravity and the rotating shaft, thereby reducing vibrations and enabling smooth operation.
Solution Approach 2:
The invention enables dynamic adjustment of the rotor assembly's mass distribution by allowing the coupling pins to be repositioned or have their masses adjusted. This parameter change capability allows the system to optimize the center of gravity alignment with the rotating shaft, minimizing vibrations and improving operational reliability.
3Reliability
If multiple coupling pins are used to prevent slip, then slip prevention improves, but the device complexity increases
Solution Approach 1:
The coupling pins serve multiple functions simultaneously: they prevent slip between rotor disks, provide balancing capability to adjust the center of gravity, and act as structural connectors. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity despite using multiple pins.
Solution Approach 2:
The invention merges the functions of mechanical connection and mass balancing into a single integrated component system. The coupling pins combine both the role of preventing slip through mechanical interlocking and the role of balancing the rotor assembly through adjustable mass distribution, thereby reducing overall system complexity.
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 effectively prevents slip between rotor disks and balances the center of gravity, reducing vibrations and ensuring reliable operation of the gas turbine.
Implementation Method 1
a slip may occur between the rotor disks due to centrifugal force generated by rotation of the rotor
Implementation Method 2
a balancing operation such that the center of gravity thereof is the same as that of a rotating shaft
Data Source
AI summary
Various embodiments provide a rotor disk assembly capable of preventing a slip between rotor disks when rotating, and capable of performing a balancing operation such that the center of gravity thereof is the same as that of a rotating shaft, and a gas turbine including the rotor disk assembly. The rotor disk assembly may include: a plurality of rotor disks disposed parallel to each other; a tie rod passing through the plurality of rotor disks and coupling the plurality of rotor disks to each other; a plurality of coupling depressions formed in each of facing surfaces of the plurality of rotor disks; and a plurality of coupling pins each having opposite ends inserted into the corresponding respective coupling depressions of the facing surfaces.