Sealed refrigerant compressor and refrigeration device
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Solution Overview
Problem
In reciprocating refrigerant compressors, the unbalanced load caused by the oil feeding passage in the main shaft part leads to increased vibration, which is not adequately addressed by conventional balance weights, necessitating further reduction of this unbalanced load to achieve lower vibration levels.
Innovation Solution
The implementation of a balance adjustment means, such as a balance hole or weight, on the rotor secured to the main shaft part, which adjusts the unbalanced load by altering the rotor's mass distribution, effectively reducing the vibration by fine-tuning the balance adjustment location within specific sector column regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If balance weights are mounted on the crankshaft or rotor to mitigate unbalanced load, then vibration reduction is achieved, but the unbalanced load caused by the oil feeding passage structure in the main shaft part is not adequately addressed
Solution Approach 1:
The balance adjustment means is integrated into the rotor structure, merging the balancing function with the existing rotor component. This eliminates the need for separate balance weights on the crankshaft and provides more precise control over the balance adjustment location, effectively addressing the unbalanced load from the oil feeding passage while reducing overall device complexity.
Solution Approach 2:
The balance adjustment means is positioned at specific locations on the rotor (such as balance holes at predetermined positions) to locally counteract the unbalanced load generated by the oil feeding passage structure. This localized approach provides precise control over where balancing mass is added or removed, directly targeting the source of vibration without requiring complex global balance weight configurations.
2Object-affected harmful factors
If conventional balance weights are used to counteract unbalanced load, then some vibration reduction is achieved, but further vibration reduction is not possible due to insufficient adjustment precision
Solution Approach 1:
The invention changes the parameters of the rotor by providing balance holes at multiple predetermined positions around the rotor periphery. By selectively plugging or opening these balance holes, the mass distribution of the rotor can be precisely adjusted in small increments, enabling fine-tuned balance control that goes beyond what conventional balance weights can achieve. This parameter-based adjustment method provides superior manufacturing precision for balance control.
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 significantly reduces the unbalanced load in the main shaft part, leading to further vibration reduction in the sealed refrigerant compressor, enhancing its operational stability and efficiency.
Implementation Method 1
a balance adjustment means which adjusts an unbalanced load caused by a structure of at least the main shaft part
Implementation Method 2
The lubricating oil reserved in the sealed container is suctioned up into the first oil feeding passage by a centrifugal force caused by the rotation of the crankshaft
Data Source
AI summary
A sealed refrigerant compressor (10A) accommodates an electric component (20A) and a compression component (30) in a sealed container (11). A crankshaft (40) included in the compression component (30) includes a main shaft part (41) and an eccentric shaft part (42). A main shaft part (41) is secured to a rotor (22A) of the electric component (20A). The rotor (22A) is provided with a balance adjustment means such as a balance hole (27), which adjusts an unbalanced load caused by the structure of the main shaft part (41).