Scroll Compressor Rotor Offset Reduces Thrust Friction
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Solution Overview
Problem
The scroll compression device experiences increased sliding loss on the thrust face of the driving shaft due to the weight of the driving shaft assembly, which affects the efficiency of the compression mechanism.
Innovation Solution
The center position of the rotor is located lower than the center position of the stator, reducing the upward force on the thrust face and minimizing sliding loss by ensuring the respective center positions coincide during operation, with the rotor's position adjusted to prevent jumping and allow magnetization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the driving shaft assembly weight is supported by the thrust plate, then the driving shaft is stable, but sliding loss on the thrust face increases
Solution Approach 1:
The rotor's center position is deliberately positioned lower than the stator's center position. This creates an offset that generates an upward centrifugal force during motor operation, which counteracts the downward weight of the driving shaft assembly. The counterbalancing effect reduces the net force on the thrust face, thereby reducing sliding loss while maintaining driving shaft stability.
2Loss of energy
If the rotor center position is raised to align with stator center, then sliding loss increases, but motor operation efficiency improves
Solution Approach 1:
The invention changes the positional parameter of the rotor center relative to the stator center. By positioning the rotor center lower than the stator center, the system creates a controlled offset that generates beneficial upward force during operation. This parameter change optimizes the balance between reducing sliding loss and maintaining motor operation efficiency.
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 reduces sliding loss on the thrust face, prevents collision sounds, and allows for efficient magnetization of the rotor, enhancing the overall operational efficiency and stability of the scroll compression device.
Implementation Method 1
the center position of the rotor is located to be lower than the center position of the stator, resulting in occurrence of force which makes the respective center positions coincident with each other during the operation of the driving motor
Data Source
AI summary
A scroll compression mechanism 11 for compressing refrigerant and a driving motor 13 that is connected to the scroll compression mechanism 11 through a driving shaft 15 and drives the scroll compression mechanism 11 are accommodated in a casing 3, the scroll compression mechanism 11 is supported in the casing 3 by a main frame 21, a stator 37 of the driving motor 13 is directly or indirectly supported in the casing 3, and the driving shaft 15 is connected to a rotor 39 of the driving motor 13 and supported in the casing 3 by a bearing plate 8, and a lower end of the driving shaft 15 is supported by a thrust plate 6 provided to the bearing plate 8, and the center position of the rotor 39 is located to be lower than the center position of the stator 37.