Motor Compressor Drive System Non-Through Shaft Design

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current mechanical drive systems for motor compressors, particularly those with flexible coupling devices, face issues of increased weight, length, and thermal degradation, with rotational speed limitations due to centrifugal forces, leading to performance degradation.

Innovation Solution

A mechanical system with a rotor having a non-through shaft and cylindrical magnetic blocks enclosed between compaction elements, directly connected to transmission shafts, eliminating the need for flexible coupling devices and allowing higher rotational speeds and improved torque transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a flexible coupling device is used to connect the rotor shaft to the compression section shaft, then the own modes of the rotor shafts can be separated, but the weight and length of the transmission line increase

Engineering Contradiction:

Improveseparation of rotor shaft modesVSAvoidweight of transmission line

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

The patent removes the flexible coupling device from the transmission system, extracting the problematic intermediate component that caused weight increase. The rotor shaft is directly connected to the compression section shaft, eliminating the coupling device and its associated bearings, thereby reducing the weight of the transmission line while maintaining functional integrity through direct rigid connection.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If a flexible coupling device is used to connect the rotor shaft to the compression section shaft, then the own modes of the rotor shafts can be separated, but the length of the transmission line increases

Engineering Contradiction:

Improveseparation of rotor shaft modesVSAvoidlength of transmission line

Core Design Contradiction:

ReliabilityVSLength of moving object

Solution Approach 1:

The patent removes the flexible coupling device from the transmission system, extracting the problematic intermediate component that caused length increase. The rotor shaft is directly connected to the compression section shaft, eliminating the coupling device and its associated bearings, thereby reducing the length of the transmission line while maintaining functional integrity through direct rigid connection.

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If a flexible coupling device is used to connect the rotor shaft to the compression section shaft, then the own modes of the rotor shafts can be separated, but thermal energy is dissipated degrading performance

Engineering Contradiction:

Improveseparation of rotor shaft modesVSAvoidthermal energy dissipation

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent removes the flexible coupling device from the transmission system, eliminating the source of thermal energy dissipation. By establishing a direct rigid connection between the rotor shaft and compression section shaft, the system eliminates friction and energy loss associated with flexible couplings, thereby reducing thermal energy dissipation and improving overall system performance.

Inventive Principle:

Principle #2Taking out (Extraction)

4Speed

If the rotor has a through shaft connected directly to the compression section shaft, then the rotational speed is not limited, but the peripheral speed is limited to 200 m/s due to centrifugal force concentration in magnetic sheets

Engineering Contradiction:

Improverotational speedVSAvoidstrength of magnetic sheets

Core Design Contradiction:

SpeedVSStrength

Solution Approach 1:

The patent segments the rotor structure by introducing a non-through shaft configuration with a hollow cylindrical core. This segmentation allows the magnetic sheets to be arranged in a way that distributes centrifugal forces more effectively, preventing stress concentration. The hollow shaft design enables the rotor to achieve higher peripheral speeds exceeding 200 m/s while maintaining the structural integrity of the magnetic sheets.

Inventive Principle:

Principle #1Segmentation

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 configuration reduces weight and length, enables higher rotational speeds, and enhances overall performance by removing rotational speed limitations and thermal degradation issues, resulting in increased power and efficiency.

Implementation Method 1

a cylindrical magnetic block (21) enclosed between a first (22) and a second (23) raised compaction elements forming a rotor shaft

Methodology Applied

Scientific EffectMechanical compression: Compression

Implementation Method 2

The rotor (15) comprises a non-through shaft and comprises a cylindrical magnetic block (21) enclosed between a first (22) and a second (23) raised compaction elements

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS20220010734A1Mechanical drive system and associated motor compressor

Publication Date: 2022.01.13 GE ENERGY POWER CONVERSION TECHNOLOGY LTD(GB)

AI summary

This mechanical system for rotating electric machine comprises at least one rotor and at least one transmission shaft for mechanical device. The rotor has a non-through shaft and comprises a cylindrical magnetic block enclosed between a first and a second raised compaction elements forming a rotor shaft, with one end of the transmission shaft being connected directly to the first compaction element.