Oil Conveyor Ring Lubrication for Electric Motor Bearings
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Solution Overview
Problem
Large electric motors with roller bearings require frequent relubrication, which is costly and inefficient, and existing lubrication systems do not provide reliable, self-sufficient lubrication, leading to reduced service life and increased maintenance.
Innovation Solution
A device comprising an oil storage chamber with an oil sump and an oil conveyor ring that pumps oil from the sump to the roller bearing, eliminating the need for regular relubrication and allowing for oil cooling, featuring a bushing on the shaft to guide the oil feed ring and prevent damage, and shaft sealing rings to prevent oil loss and contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If grease lubrication is used in roller bearings, then the bearing can be lubricated, but regular relubrication is necessary after a certain number of operating hours
Solution Approach 1:
The oil sump is pre-filled with a large amount of lubricating oil before operation begins. This preliminary supply of lubricant eliminates the need for periodic relubrication during the bearing's service life, allowing continuous operation without maintenance interruptions.
Solution Approach 2:
The oil conveyor ring automatically circulates oil from the sump to the bearing and back without external intervention. The system is self-sufficient, using the bearing's own rotation to drive the oil conveyor ring, which continuously pumps oil through the bearing without requiring manual relubrication.
2Reliability
If grease lubrication is used in roller bearings, then the bearing can be lubricated, but costs increase due to regular relubrication
Solution Approach 1:
The system automatically circulates oil through the bearing using the oil conveyor ring driven by the bearing's rotation. This self-service mechanism eliminates the need for manual relubrication operations, reducing maintenance effort and improving reliability through consistent automated lubrication.
Solution Approach 2:
The oil conveyor ring provides continuous oil circulation to the bearing throughout operation, ensuring uninterrupted lubrication. This continuous action maintains reliable lubrication without the periodic interruptions required by grease relubrication, eliminating maintenance effort while preserving lubrication reliability.
3Volume of moving object
If the oil sump is positioned close to the shaft, then the lubrication system is compact, but the oil conveyor ring may contact and damage the roller bearing
Solution Approach 1:
The system separates the oil sump from the shaft area using a bushing as an intermediate structure. The bushing creates a distinct spatial zone that allows the oil sump to be positioned close to the shaft while preventing direct contact between the oil conveyor ring and the roller bearing, thus maintaining system compactness without compromising bearing protection.
Solution Approach 2:
The bushing acts as an intermediary element between the oil sump and the shaft. It provides a controlled path for the oil conveyor ring, guiding it away from the roller bearing while still allowing effective oil delivery. This intermediary structure enables close positioning of components while protecting the bearing from damage.
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 reliable, self-sufficient permanent lubrication, extending the service life of the roller bearing, reducing maintenance costs, and allowing for oil cooling, while preventing oil loss and contamination.
Implementation Method 1
an oil conveyor ring which runs directly or indirectly along a shaft (5) of the electric motor and through which oil is pumped out of the oil sump (7) into the shaft (5) and the lubricating chamber (14) arranged adjacent to the roller bearing (3) can be transported
Implementation Method 2
the roller bearing can be cooled by the oil
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a device (1) for lubricating an antifriction bearing (3) of an electric motor (4), comprising an oil reservoir (6) which can be arranged on the electric motor and includes an oil pan (7), and comprising an oil delivery ring (9) or oil delivery disk which directly or indirectly moves along on a shaft (5) of the electric motor (4), runs through the oil pan (7), and allows oil to be transported from the oil pan into a lubrication chamber (14) located around the shaft (5) and adjacent to the antifriction bearing (3) when the shaft (5) rotates.