Modular High-Speed Gear Drive for Compact MW Power Transmission
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Solution Overview
Problem
Existing drive systems for high-speed applications, such as those interacting with turbines and compressors, are bulky, heavy, and expensive, particularly when transmitting powers over 1 MW.
Innovation Solution
A drive system comprising a central shaft, central gear wheel, decentralized gearwheels, and high-speed electric machines (operating at 4,000 rpm) that are directly coupled without transmission, allowing for modular construction using standard components and achieving high-speed operation with reduced size and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If conventional drive solutions with slower electric machines are used, then torque requirements are met, but the system becomes bulky, heavy, and expensive
Solution Approach 1:
The patent changes the operating speed parameter of electric machines from conventional slow speeds to high speeds (4,000 rpm or more). This parameter change allows the use of smaller, lighter electric machines while meeting the same power transmission requirements through speed multiplication via gear mechanisms.
Solution Approach 2:
The drive system is segmented into multiple independent drive units, each comprising an electric machine coupled to a decentralized gearwheel that meshes with a central gearwheel. This segmentation allows parallel power transmission paths and enables the use of smaller individual components rather than one large slow-speed machine.
2Area of stationary object
If high-speed electric machines (4,000 rpm) are used, then installation space and weight are reduced, but transmission complexity increases
Solution Approach 1:
The patent merges the transmission functions into a single planetary gear stage where decentralized gearwheels mesh with a central gearwheel. This combines multiple gear functions into one integrated mechanism, reducing the number of separate transmission stages and simplifying the overall structure despite the high-speed operation.
Solution Approach 2:
The central gearwheel serves multiple functions: it is driven by multiple decentralized gearwheels simultaneously, acts as a speed multiplication mechanism, and transmits power to the central shaft. This multi-functionality reduces the need for additional transmission components.
3Ease of manufacture
If modular design with standard components is used, then manufacturing cost is reduced, but system integration complexity increases
Solution Approach 1:
The drive system is divided into identical modular drive units that can be manufactured independently using standard electric machines and gear components. Each module is self-contained with an electric machine, decentralized gearwheel, and associated bearings, allowing parallel manufacturing and assembly.
Solution Approach 2:
The modular design uses universal standard components (electric machines, gearwheels, bearings) that can be mass-produced and interchangeably assembled. The same basic module configuration serves multiple power transmission requirements by varying the number of modules rather than designing custom components for each application.
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 system achieves high-speed operation with reduced installation space and cost, utilizing standard components and modular design to transmit powers up to 10 MW efficiently.
Implementation Method 1
At least two and at most four, namely two or three or four, decentralized gearwheels distributed over the circumference of the central gearwheel and meshing with the central gearwheel
Data Source
AI summary
A drive system has at least one drive unit each drive unit including a central shaft and a central gear connected to the central shaft such that the central gear rotates at a speed of the central shaft. Two to four decentralized gears are distributed around the circumference of the central gear and mesh with the central gear such that the rotational speed of the central gear is at least 0.5 times the rotational speed of the decentralized gears. A plurality of electric machines are operable at a speed of at least 4,000 rpm, and each decentralized gear wheel is coupled directly and without transmission ratio to a single electric machine or to two electric machines, respectively.