Vibrometer Probe Alignment via Guide Cylinder and Movable Attachment
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Solution Overview
Problem
Existing vibrometer systems face difficulties in secure attachment and removal due to errors in machining or assembly, and slight swings, making it challenging to insert the distal end into the securing portion within rotating machines like compressors.
Innovation Solution
A vibrometer assembly with a guide cylinder and attachment that includes movable joints to axially align the probe with the inside securing portion, allowing secure attachment and removal through the guide cylinder from outside the case, ensuring alignment and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the vibrometer is passed straight through the cylinder penetrating the case, then the attachment can be secured outside the case, but the distal end cannot be smoothly inserted into the inside securing portion due to machining errors, assembly errors, or swing of the vibrometer
Solution Approach 1:
A guide rod with a guide portion is introduced as an intermediary component between the vibrometer and the inside securing portion. The guide portion fits into a guide hole in the bearing device housing, providing a reference path that compensates for machining and assembly errors, enabling smooth insertion of the distal end into the securing portion
Solution Approach 2:
The attachment structure is changed to include a movable portion that can adjust its position along the vibration measurement direction. This allows the attachment to accommodate slight swings and misalignments while maintaining proper insertion into the securing portion
2Measurement precision
If the distal end of the vibrometer is secured near the rotating shaft, then vibration measurement accuracy is improved, but the distal end becomes distant from the case making insertion difficult
Solution Approach 1:
The guide rod acts as a mediator that extends from the case through to the bearing device housing, providing a continuous reference path that allows the distal end to be positioned accurately near the rotating shaft while still being guidable from outside the case
Solution Approach 2:
The attachment is designed with a movable portion that can dynamically adjust its position along the vibration measurement direction, allowing it to reach the optimal measurement position near the rotating shaft while accommodating the long distance from the case
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
Facilitates easy and secure attachment and removal of the vibrometer by guiding the probe to the correct position, reducing the impact of machining errors and assembly issues, and maintaining stability during operation.
Implementation Method 1
a probe which is used for measuring a distance from a surface of a rotating shaft by an eddy current
Data Source
AI summary
A vibrometer assembly including a vibrometer configured to measure vibration of a rotating shaft, includes: a probe of the vibrometer that is to be secured to a bearing device that supports the rotating shaft; a guide cylinder that is to be provided to a case so as to penetrate the case and protrude into the case, the case being located outside the bearing device; an attachment that is to be connected to the probe and inserted into the guide cylinder, and at least partially has a movable portion to allow the probe to be axially aligned with an inside securing portion in the bearing device; and an outside securing portion that secures the attachment to the guide cylinder or the case outside the case.