Multi-Compressor Gear Train for High-Speed Bearing Load Control
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Solution Overview
Problem
Existing compressor systems face challenges in stably operating multiple compressors at high speed due to increased surface pressure on bearings, which limits the ability to support high-speed rotation effectively.
Innovation Solution
A compressor system incorporating a transmission mechanism with planetary gear mechanisms that includes a main shaft, main gear, and multiple gear mechanisms surrounding the main shaft, allowing for increased rotation speed transmission to compressors while reducing the need for high-speed rotation of auxiliary shafts and thus minimizing bearing surface pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the output shaft of the speed increaser rotates at high speed to drive the compressor, then the compressor can operate at high speed, but the shaft diameter must be reduced which decreases the bearing size and increases surface pressure beyond allowable limits
Solution Approach 1:
The patent divides the single speed increaser into multiple speed increasers (first speed increaser and second speed increaser), each driving a separate compressor. This segmentation allows the rotation speed to be distributed across multiple smaller shafts and bearings, reducing the surface pressure on each individual bearing while maintaining high-speed operation of the compressors.
2Device complexity
If multiple compressors are connected to one driving machine via a single speed increaser, then the system structure is simplified, but the bearing surface pressure increases too much to stably support high-speed rotation
Solution Approach 1:
The patent segments the single speed increaser into multiple speed increasers, each with its own auxiliary shaft and bearing. This allows the system to maintain relative simplicity while distributing the mechanical load across multiple bearings, thereby ensuring stable high-speed operation of multiple compressors driven by one driving machine.
Solution Approach 2:
The patent transitions from a single-axis speed increaser to a multi-axis configuration where multiple auxiliary shafts rotate in different dimensions around the main shaft. This dimensional change allows the system to handle multiple compressors with reduced surface pressure on each bearing, improving reliability while maintaining structural efficiency.
3Speed
If the shaft diameter of the output shaft is reduced to enable high-speed rotation, then the bearing size decreases, but the allowable surface pressure limit is exceeded making stable support difficult
Solution Approach 1:
The patent applies segmentation by dividing the single large bearing into multiple smaller bearings, each supporting a separate auxiliary shaft. This allows the shaft diameter to be reduced for high-speed rotation while the total load capacity is maintained across multiple bearings, each operating within their allowable surface pressure limits.
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 stable operation of multiple compressors at high speed with reduced bearing surface pressure, allowing for more flexible bearing design and reduced load on the output shaft, thereby enhancing the system's ability to handle high-speed rotation efficiently.
Implementation Method 1
a transmission mechanism configured to increase a speed of a rotation of the drive shaft and transmit the rotation of the drive shaft to the plurality of compressors, in which the transmission mechanism includes a main shaft which configured to rotate together with the drive shaft, a main gear fixed to the main shaft, and a plurality of gear mechanisms disposed to surround the main shaft
Data Source
AI summary
A compressor system includes a driving unit having a drive shaft, a plurality of compressors which compress a gas, and a transmission mechanism which increases a speed of a rotation of the drive shaft and transmits the rotation to the plurality of compressors. The transmission mechanism includes a main shaft which rotates together with the drive shaft and a plurality of gear mechanisms which transmit a rotation of the main shaft to the corresponding one compressor. The gear mechanism includes an auxiliary shaft which rotates together with an auxiliary gear meshing with the main gear, a plurality of first gears which rotate together with the auxiliary shaft, an output shaft to which an output gear meshing with the first gear is fixed and which is connected to the compressor, and a first bearing which rotatably supports the auxiliary shaft, and a second bearing which rotatably supports the output shaft.