Scroll Compressor Decouplable Orbital Counterweight
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Solution Overview
Problem
Existing compressors face challenges in optimally controlling centrifugal forces generated by the moving compressor body on an orbital path, which affects the radial force on the spiral ribs and overall efficiency.
Innovation Solution
A coupling unit is introduced that can switch between a centrifugal force-coupling and decoupling state, allowing the orbital balancing mass to either enhance or counteract the centrifugal force based on the drive shaft's speed, using a positioning device to manage the coupling elements' interaction with the driver and balancing mass.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the orbital path compensating mass is always coupled to the driver, then the centrifugal force is always counteracted, but the compressor cannot adapt to different operating conditions requiring both coupling and decoupling states
Solution Approach 1:
The coupling unit transitions from a static connection to a dynamic, speed-dependent connection. The positioning device adjusts the coupling state between the orbital path compensating mass and driver based on rotational speed, enabling the system to adapt between coupling and decoupling states without requiring complex control systems
Solution Approach 2:
The positioning device automatically adjusts the coupling unit's state based on the drive shaft's rotational speed without external intervention. The system self-regulates by utilizing the speed-dependent positioning mechanism to engage or disengage the coupling between the compensating mass and driver, eliminating the need for additional control systems
2Force
If the coupling unit is always in the centrifugal force coupling state, then the radial force on spiral ribs is reduced, but the compressor loses the ability to utilize full centrifugal force at low speeds for optimal operation
Solution Approach 1:
The coupling unit's force transmission characteristic changes dynamically with rotational speed. At low speeds, the decoupling state allows full centrifugal force to act on the spiral ribs for optimal compression. At high speeds, the coupling state engages to reduce excessive radial forces, thereby maintaining productivity across the entire operating range
Solution Approach 2:
The system changes the operational parameter of force transmission by transitioning between coupling and decoupling states. This parameter change allows the radial force on the spiral ribs to be optimized at different speed ranges, with full force utilization at low speeds and force reduction at high speeds
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 solution enables the compressor to adapt to different operating states by either allowing the full centrifugal force to act on the spiral ribs at low speeds or counteracting it at higher speeds, optimizing the force distribution and preventing damage to the compressor components.
Implementation Method 1
an orbital path balancing mass that counteracts an imbalance caused by the compressor body moving on the orbital path
Implementation Method 2
the coupling unit is effective in a centrifugal force coupling state such that the orbital path compensating mass counteracts a centrifugal force of a unit comprising at least the driver and the orbiting compressor body
Data Source
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AI summary
The invention relates to a compressor comprising a compressor housing (12), a scroll compressor unit (22) which is arranged in the compressor housing (12) and has a first stationarily arranged compressor body (24) and a second compressor body (26) that is movably arranged relative to the stationarily arranged compressor body (24), an eccentric drive (242) for the scroll compressor unit (22), said eccentric drive having a driver (246) which is driven by a drive motor (222) and circulates about the central axis (44) of a drive shaft (228) on the orbital path (48), and an orbital path balancing mass (252) which counteracts an imbalance due to the compressor body (26) moving on the orbital path (48). The aim of the invention is to improve such a compressor such that the long-term stability of the guidance of the driver (246) in the driver receptacle can be ensured even at high rotational speeds. This is achieved in that the orbital balancing mass (252) is coupled to the eccentric drive (242) in such a way that said balancing mass moves on the orbital path (48) in a manner corresponding to the movement of the driver (246), but is decoupled with respect to the transmission of tilting moments to the driver, and that driver and orbital balancing mass can be effective in a state coupling the centrifugal force and in a state decoupling the centrifugal force.