Orbiting Scroll Grooves for Weight Balance and Vibration Control
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Solution Overview
Problem
Existing scroll compressors using a pin-and-ring rotation-preventing mechanism face challenges in balancing vibration forces in the radial direction due to the revolution of the orbiting scroll, necessitating a counterweight that increases the size and weight of the compressor.
Innovation Solution
The orbiting scroll is designed with grooves on its outer peripheral surface that do not communicate with the plate surfaces, allowing for reduced weight and balanced vibration forces without interfering with the spiral body, and enabling the use of a smaller counterweight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a pin-and-ring rotation-preventing mechanism is adopted, then the vibration force in the radial direction due to the revolution of the orbiting scroll can be reduced, but the weight of the orbiting scroll remains high requiring a large counterweight
Solution Approach 1:
The patent extracts material from the orbiting scroll by forming grooves in the outer peripheral surface of the orbiting end plate. These grooves remove unnecessary material while preserving the essential structural integrity and rotational function of the orbiting scroll, thereby reducing its overall weight without compromising its ability to counterbalance radial vibration forces
Solution Approach 2:
The patent applies local quality modification by creating grooves only in specific regions of the orbiting end plate's outer peripheral surface. This localized material removal optimizes the weight reduction while maintaining the structural strength where it is most needed, allowing the orbiting scroll to effectively balance vibration forces with minimal weight
2Weight of moving object
If the weight of the orbiting scroll is reduced, then the size and weight of the counterweight can be reduced, but the structural integrity and vibration balancing capability may be compromised
Solution Approach 1:
The grooves are strategically positioned in the outer peripheral surface of the orbiting end plate where material removal has minimal impact on structural integrity. This localized modification allows weight reduction while preserving the strength and vibration balancing capability of the orbiting scroll
3Weight of moving object
If grooves are added to the outer peripheral surface of the orbiting end plate, then the weight of the orbiting scroll is reduced, but the complexity of manufacturing increases
Solution Approach 1:
The grooves can be formed using various manufacturing processes including machining, molding, or additive manufacturing techniques. The groove geometry and positioning are designed to be compatible with standard manufacturing methods, minimizing the increase in manufacturing complexity while achieving the desired weight reduction
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 design reduces the weight and size of the orbiting scroll while effectively balancing vibration forces, enhancing the compressor's efficiency and flexibility in design.
Implementation Method 1
an orbiting scroll (80) consisting of an orbiting end plate (81) located to face the fixed spiral body (73), and a spiral-shaped orbiting spiral body (82) erected from a first plate surface (81a) of the orbiting end plate (81) toward the fixed spiral body (73)
Implementation Method 2
a vibration force (centrifugal force) in the radial direction due to the revolution of the orbiting scroll can be balanced by a counterweight provided on the driving shaft
Data Source
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AI summary
An object of the invention is to achieve both weight reduction and weight balance of an orbiting scroll. A scroll compressor (10) includes a fixed scroll (70) and an orbiting scroll (80) stored in a housing (20), and a pin-and-ring rotation-preventing mechanism (90) that prevents rotation of the orbiting scroll (80). The orbiting scroll (80) includes an orbiting spiral body (82) erected from a first plate surface (81a) of a disk-shaped orbiting end plate (81) toward the fixed spiral body (73). The rotation-preventing mechanism (90) consists of a plurality of circular recessed portions (91) provided in a second plate surface (81b) of the orbiting end plate (81), and a plurality of pins (93) extending from the housing (20) into the plurality of recessed portions (91) to be engaged with the recessed portions (91). The orbiting end plate (81) has, in an outer peripheral surface (81c) thereof, at least one groove (111, 112) that does not communicate with the first plate surface (81a) or the second plate surface (81b) .