Telemetry Unit Carrier Insulator High Speed Shaft

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Solution Overview

Problem

Existing telemetry units for rotational shaft assemblies are not suitable for high-speed applications due to the inability of known insulating materials to withstand excessive radial growth and hoop stress, leading to potential damage and failure at high rotational speeds.

Innovation Solution

A telemetry unit with a metallic annular carrier and an electrically insulative annular insulator, where the carrier engages the insulator to prevent radially-outward displacement, combined with a retainer to securely position the antenna, ensuring the unit's components withstand high rotational speeds without damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If known insulating materials are used in telemetry units, then electrical insulation is provided, but the materials cannot withstand excessive radial growth and hoop stress at high rotational speeds

Engineering Contradiction:

Improvewithstand radial growth and hoop stressVSAvoiddamage and failure at high rotational speeds

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The patent employs a composite structure consisting of a metallic annular carrier and an electrically insulative annular insulator. The carrier provides mechanical strength to withstand centrifugal forces, while the insulator provides electrical insulation. This composite approach allows the telemetry unit to function reliably at high rotational speeds (10,000-43,000 rpm) by combining materials with complementary properties.

Inventive Principle:

Principle #40Composite materials

2Reliability

If the insulator is not secured against centrifugal force, then the structure remains simple, but the insulator experiences excessive radial growth and potential failure

Engineering Contradiction:

Improveprevent radially-outward displacementVSAvoidcarrier engagement structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The insulator is disposed about the carrier in a nested configuration, with the carrier's outer circumferential surface engaging the insulator's inner circumferential surface. This nested arrangement allows the carrier to provide structural support while containing the insulator, preventing radially-outward displacement due to centrifugal forces without requiring additional complex retention mechanisms.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Reliability

If the antenna is not securely positioned, then manufacturing is easier, but the antenna may displace under high-speed rotation affecting data transmission

Engineering Contradiction:

Improveaccurate data transmissionVSAvoidantenna positioning

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The retainer acts as an intermediary component between the insulator and the antenna. It is disposed about the insulator and engages the antenna to securely position it, preventing displacement under high-speed rotation while maintaining accurate data transmission. This intermediary structure simplifies the overall manufacturing process by providing a dedicated component for antenna retention.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 effectively prevents damage from centrifugal forces at high speeds, allowing the telemetry unit to function reliably at rotational speeds ranging from 10,000 rpm to 43,000 rpm without failure, by securely fixing the insulator and antenna, thus ensuring accurate data transmission.

Implementation Method 1

The carrier is configured to engage a portion of the insulator outer surface to prevent radially-outward displacement of the insulator when the telemetry unit rotates about the axis

Methodology Applied

Scientific EffectCentrifugal force: Centrifugal Force

Implementation Method 2

at least one transmitter electrically coupled with the sensor and with the antenna to wirelessly transmit data measurements

Methodology Applied

Scientific EffectElectromagnetic radiation:

Data Source

PatentUS10911841B2Telemetry unit for high speed shaft assemblies

Publication Date: 2021.02.02 KAYDON RING & SEAL INC

AI summary

A telemetry unit for high speed shafts includes a metallic annular carrier having an inner circumferential surface defining a bore, for receiving a shaft or sleeve to rotatably couple the telemetry unit with the shaft, an outer circumferential surface, opposing axial ends, and interior cavities. An annular insulator formed of an electrically insulative material has an inner circumferential surface disposed about the carrier outer surface, an outer circumferential surface, and opposing axial ends. A generally circular antenna is disposed circumferentially about the insulator outer surface and an annular retainer is disposed about the insulator outer surface such that the antenna is generally sandwiched between the retainer and the insulator to generally fix the antenna relative to the carrier. The carrier engages a portion of the insulator outer surface to prevent radially-outward displacement of the insulator when the telemetry unit rotates about the axis.