Motor Balancing Disc Venting for Rotor Oil Pressure Balance
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Solution Overview
Problem
In motor cooling systems, the high-speed rotation of the motor shaft creates a vacuum effect in the inner cavity, leading to an imbalance in air pressure and an excessive draw of cooling oil, which can disrupt the motor's operation.
Innovation Solution
The proposed solution involves a balancing disc with through holes and oil draining grooves that connect the rotor iron core's oil path channels with the motor's rotating shaft. These through holes allow air to enter or exit the oil path channels, balancing air pressure and reducing the vacuum effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If high-speed rotation of the motor shaft is used for cooling, then cooling efficiency is improved, but air pressure imbalance and vacuum effect occur causing excessive oil draw
Solution Approach 1:
The balancing disc acts as an intermediary component between the inner cavity and the external environment. It features oil draining grooves that connect oil path channels with the oil outlet hole, and through holes that communicate with oil path channels to allow air passage. This mediator structure regulates the interaction between rotating shaft dynamics and oil cooling flow, balancing air pressure while controlling oil draw.
Solution Approach 2:
The invention changes the physical parameters of the system by introducing air through the through holes into the oil path channels. This alters the pressure differential parameter, transforming the vacuum effect caused by high-speed rotation into a balanced pressure state, thereby reducing excessive oil draw while maintaining cooling efficiency.
2Temperature
If oil passages are designed on the rotor assembly for cooling, then cooling function is achieved, but vacuum effect disrupts motor operation
Solution Approach 1:
The balancing disc serves as a mediator that connects the oil cooling system with the air pressure balance system. The oil draining grooves and through holes work together to allow air to enter the oil path channels, preventing vacuum formation that would disrupt motor operation, while maintaining the oil cooling function through the connected oil passages.
Solution Approach 2:
The balancing disc segments the cooling system into distinct functional zones: oil draining grooves for oil flow control, through holes for air passage, and communication paths for pressure balance. This segmentation allows independent optimization of cooling function and pressure balance, ensuring reliable motor operation.
3Stress or pressure
If through holes are added to the balancing disc for air passage, then air pressure balance is improved, but device complexity increases
Solution Approach 1:
The balancing disc is designed as a multi-functional component that simultaneously performs oil draining, air passage, and pressure balancing functions. The through holes and oil draining grooves are integrated into a single disc structure, allowing one component to fulfill multiple roles rather than requiring separate parts for each function, thus minimizing overall device complexity.
Solution Approach 2:
The invention merges the air passage function and oil draining function into a single balancing disc structure. The through holes and oil draining grooves are combined on the same component, which also serves as the pressure balancing element. This consolidation reduces the number of separate parts and simplifies the overall device structure.
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 implementation of this solution reduces the pressure difference between the motor's inner cavity and other oil structures, minimizing the excessive draw of cooling oil and ensuring proper motor operation while enhancing air cooling of the rotor iron core.
Implementation Method 1
the high-speed rotation of the motor shaft creates a vacuum effect in the inner cavity, leading to an imbalance in air pressure
Implementation Method 2
the through holes are configured to connect the first end face with the second end face and are adapted to communicate with the oil path channels to introduce air into or discharge air from the oil path channels
Implementation Method 3
the oil draining grooves are arranged at the first end face and are configured to connect oil path channels in the rotor iron core with an oil outlet hole of a motor rotating shaft
Implementation Method 4
the oil fluid is sprayed from the balancing disk to a stator winding through an oil path formed by the balancing disk and the rotor iron core, thus completing the cooling of the rotor assembly
Implementation Method 5
enhancing air cooling of the rotor iron core
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The invention relates to a balancing disc (100) for a motor, a rotor assembly (10), a motor and an electric device, the balancing disc (100) is provided with through holes (1), oil draining grooves, and a first end face and a second end face which are configured to be arranged oppositely, first end face is adapted to cooperate with an end face of a rotor iron core (200); the oil draining grooves are at the first end face and are configured to connect oil path channels in the rotor iron core (200) with an oil outlet hole of a motor rotating shaft (300). The through holes (1) are configured to be connect the first end face with the second end face and are adapted to communicate with oil path channels to introduce air into or discharge air from oil path channels.