ESP Motor Bearing Retaining Plate for Ceramic Anti-Rotation Tabs

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Solution Overview

Problem

Existing rotor bearing assemblies in electric submersible pumps (ESP) face challenges in securely retaining anti-rotation tabs during installation, particularly when using ceramic materials, which can lead to damage and increased rejection rates.

Innovation Solution

The use of retaining plates to hold spring-loaded anti-rotation tabs in place on the rotor bearing assembly, ensuring they engage effectively with the stator without applying force that could damage the ceramic material, and providing a secure fit without gaps for improved installation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If anti-rotation tabs are retained on ceramic rotor bearing assemblies during installation, then the risk of ceramic damage is reduced, but the complexity of the installation process increases

Engineering Contradiction:

Improveretention of anti-rotation tabsVSAvoidinstallation process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

A retaining plate is introduced as an intermediary component between the anti-rotation tabs and the rotor bearing assembly. The retaining plate holds the anti-rotation tabs in place during installation, preventing ceramic damage while simplifying the overall installation process by providing a straightforward retention mechanism that doesn't require complex procedures

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If force is applied to secure anti-rotation tabs, then the retention is improved, but the ceramic material may be damaged

Engineering Contradiction:

Improveretention of anti-rotation tabsVSAvoidceramic damage risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The retaining plate provides beforehand cushioning by holding the anti-rotation tabs in a controlled position before final installation. This prevents excessive force from being applied directly to the ceramic rotor bearing assembly, thereby protecting the fragile ceramic material from damage while ensuring proper retention

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Device complexity

If gaps are present in the retaining structure, then the device complexity is reduced, but the retention effectiveness decreases

Engineering Contradiction:

Improveretaining structure simplicityVSAvoidretention effectiveness

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The retaining plate is designed with a continuous structure that provides universal retention across the entire rotor bearing assembly. This continuous design eliminates gaps that would compromise retention effectiveness, while the simple plate geometry maintains low device complexity and ease of manufacture

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12421997B2Retaining plate system for ESP motor radial bearing anti-rotation tab retention

Publication Date: 2025.09.23 HALLIBURTON ENERGY SERVICES INC

AI summary

Rotor bearings for ESP motors can include anti-rotation tabs configured to engage, for example between a bearing bushing and a stator of the ESP motor. For example, prior to insertion of the rotor bearing within the stator, the anti-rotation tabs may be held in place within axial slots in the outer surface of a bearing bushing using one or more retaining plates. The retaining plates and the bearing bushing may be configured to allow for axial insertion of the retaining plates onto the bearing bushing and then rotation of the retaining plate with respect to the bearing bushing to retain the anti-rotation tab on the bearing bushing. Such systems and methods may be particularly useful for ceramic bearing bushings.