Motor Mating Ring Heat Radiation and Oil Supply
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Solution Overview
Problem
Conventional motors with mechanical seals face challenges in effectively radiating heat from the rotor and ensuring stable lubricating oil supply to the bearing, as the surface area of the mating ring is insufficient for heat radiation, leading to temperature rise and potential lubricating oil flow issues.
Innovation Solution
The motor design includes a mating ring with a lubricating oil passage, such as a through hole, and optional fins on its outer peripheral surface, which enhances heat radiation by increasing the surface area and ensures stable lubricating oil supply to the bearing, absorbing heat generated during motor operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the diameter of the mating ring is increased to improve heat radiation efficiency, then the heat radiation area of the mating ring increases, but the cross section of the flow passage of the lubricating oil between the outer peripheral surface of the mating ring and the motor housing decreases
Solution Approach 1:
The patent divides the heat radiation function and lubricating oil supply function into separate structures. The mating ring with its sealing surface handles the lubricating oil supply, while a separately provided heat radiation fin structure handles the heat radiation. This segmentation allows each component to be optimized for its specific function without compromising the other.
Solution Approach 2:
The patent introduces a heat radiation fin structure as an intermediary component between the mating ring and the motor housing. This fin structure provides an additional heat radiation pathway without interfering with the lubricating oil flow passage, effectively mediating the heat transfer while preserving oil supply stability.
2Temperature
If the surface area of the mating ring is increased to improve heat radiation, then more heat can be radiated, but the flow passage cross section for lubricating oil supply decreases
Solution Approach 1:
The patent segments the heat radiation function from the mating ring by providing a separate heat radiation fin structure. This allows the mating ring to maintain its original dimensions and flow passage cross section, while the fin structure provides the additional heat radiation area needed.
Solution Approach 2:
Instead of increasing the surface area of the mating ring in the radial dimension (which would reduce oil flow passage), the patent adds heat radiation fins that extend in the axial dimension. This dimensional change allows heat radiation area to increase without compromising the radial flow passage for lubricating oil.
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
This configuration effectively reduces temperature rise in the motor by efficiently radiating heat to the lubricating oil, ensuring stable lubricating oil supply and preventing motor degradation, particularly in applications with high heat generation like compressors.
Implementation Method 1
the heat transmitted to the mating ring can be absorbed by the lubricating oil
Implementation Method 2
The lubricating oil flows through the lubricating oil passage to the bearing side
Data Source
AI summary
A motor that ensures efficient supply of a lubricating oil to a mechanical seal and a bearing to reduce temperature rise in driving of a motor is provided. The motor includes a mechanical seal through which a rotary shaft of a rotor is inserted. The mechanical seal includes a seal ring and a mating ring. The seal ring has a sealing surface. The mating ring is secured to the rotary shaft. The mating ring has a sealing surface that contacts the sealing surface of the seal ring. The mating ring has a through hole on an outer edge side of the mating ring with respect to the sealing surface of the mating ring. The lubricating oil flows through the through hole to the bearing side.