Threaded Hollow Rotor Coupling for Vibration-Stable Direct Mounting
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Solution Overview
Problem
Existing coupling arrangements for hollow rotors are prone to vibrations and wobble, leading to inefficiencies and transmission losses.
Innovation Solution
A coupling arrangement featuring a threaded hollow cylindrical member, lateral force transfer via abutting sleeves and radial bearings, and roller bearings to stabilize the rotor, ensuring resistance to vibrations and wobble.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a coupling arrangement is used for hollow rotors, then the driving means can be mounted directly on the rotor, but vibrations and wobble occur leading to transmission losses
Solution Approach 1:
The coupling arrangement is divided into multiple functional segments: a threaded hollow cylindrical member for axial coupling, lateral force transfer means with abutting sleeves and radial bearings for radial force transfer, and roller bearings for rotational support. This segmentation allows each component to address specific issues independently, enabling direct mounting while preventing vibrations and wobble through specialized bearing arrangements.
2Reliability
If existing coupling arrangements are used for hollow rotors, then coupling is achieved, but vibrations and wobble occur
Solution Approach 1:
Roller bearings are introduced as intermediary elements between the hollow cylindrical member and the external support structure. These roller bearings act as mediators that accommodate radial and axial loads while allowing smooth rotation, thereby eliminating direct contact that causes vibrations and wobble in existing coupling arrangements.
3Strength
If the threaded member rotates in the same direction as the driving means, then the member tightens onto the rotor, but complex bearing arrangements are needed
Solution Approach 1:
The coupling arrangement merges multiple bearing functions into a compact integrated structure. The abutting sleeves and radial bearings combine to handle lateral forces, while roller bearings simultaneously support axial and radial loads. This merging of functions reduces the overall complexity compared to using separate bearing arrangements for each function.
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 provides a stable coupling that resists vibrations and wobble, eliminating transmission losses and allowing direct mounting of the driving means on the rotor.
Implementation Method 1
the member provided with a thread on its outside, which, in use is threaded into a complementary cylindrical hollow part of the driving means and wherein the threads have a tightening direction which is the same as the direction of the driving means, such that in use, when the driving means drives the member, the member is tightened onto the rotor
Implementation Method 2
a lateral force transferral means for laterally transferring force from an end of the cylindrical hollow part of the driving means to the shoulder formation of the rotor, which lateral force transferring means includes a combination of one or more of abutting sleeves and radial bearings
Implementation Method 3
at least two roller bearings mounted inside the hollow cylindrical member between the member and a stationary shaft
Data Source
AI summary
A coupling arrangement for coupling a driving means, typically a motor, to a hollow rotor and stationary shaft combination, which arrangement includes a rotor having a working formation and hollow cylindrical member extending axially from a shoulder formation (not shown) at one end of the working formation, the member provided with a thread (not shown) on its outside, which, in use is threaded into a complementary cylindrical hollow part of the motor and wherein the threads have a tightening direction which is the same as the direction of the motor, such that in use, when the motor drives the member, the member is tightened onto the rotor.