Scroll Compressor Compensation Mechanism for Vibration and Sealing
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Solution Overview
Problem
Existing scroll compressors face challenges in effectively reducing vibrations and noise while maintaining a tight fit between nested displacement spirals, despite existing compensation mechanisms.
Innovation Solution
A compensation mechanism with a driveshaft and a compensation device featuring a cylindrical hub element and a compensation element with an eccentrically arranged slotted hole, forming a Scotch yoke, limits radial movement and combines swinging and linear movements to compensate for manufacturing tolerances, thereby reducing vibrations and enhancing the seal between displacement spirals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a compensation mechanism is used to ensure tight fit between displacement spirals, then manufacturing tolerances are compensated and sealing is improved, but device complexity increases
Solution Approach 1:
The compensation element is rotatably mounted on the hub element, creating a nested structure where the compensation element is positioned within the compensation mechanism. This nesting approach allows the compensation function to be integrated into the existing structure without adding significant external complexity, while still achieving tight fit between displacement spirals through the compensation element's movement.
2Object-affected harmful factors
If existing compensation mechanisms are used to reduce vibrations, then some vibration reduction is achieved, but vibrations and noise are not sufficiently reduced
Solution Approach 1:
The compensation element is designed to move dynamically during operation, being rotatably mounted on the hub element. This dynamic movement allows the compensation element to actively counterbalance vibrations and reduce noise more effectively than static compensation mechanisms. The Scotch yoke mechanism between the second eccentric pin and slotted hole enables controlled oscillating movement that specifically targets vibration reduction.
Solution Approach 2:
The mechanism changes the operational parameters by introducing a movable compensation element that oscillates during operation. The center of gravity of the compensation element has an oscillating component during operation, creating dynamic parameter changes that enhance vibration reduction. This dynamic parameter adjustment allows for more effective suppression of vibrations and noise compared to fixed compensation mechanisms.
3Manufacturing precision
If a Scotch yoke mechanism is used with the compensation element, then manufacturing tolerances are well compensated and sealing efficiency is improved, but radial movement is limited
Solution Approach 1:
The slotted hole acts as an intermediary element between the second eccentric pin and the compensation element's rotational movement. This intermediary structure converts the pin's motion into controlled oscillating movement of the compensation element, enabling precise compensation of manufacturing tolerances while maintaining limited radial movement. The slotted hole mediates the relationship between the pin's position and the compensation element's orientation.
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
The mechanism achieves a smooth running and efficient seal between displacement spirals, significantly reducing vibrations and noise while maintaining compactness and simplicity.
Implementation Method 1
A second eccentric pin of the driveshaft is guided in the slotted hole of the compensation element in such a way that a Scotch yoke is formed between the slotted hole and the axis of rotation J of the compensation element
Implementation Method 2
The compensation device further has a compensation element, which is mounted on the hub element so that it can rotate around an axis of rotation J and has an eccentrically arranged slotted hole
Data Source
AI summary
The invention relates to a compensation mechanism for a displacement machine according to the spiral principle, in particular a scroll compressor, wherein the compensation mechanism comprises a driveshaft with a central axis S and a compensation device, which comprises a cylindrical hub element that is mounted on a first eccentric pin of the driveshaft such that it can rotate about an axis of rotation P, and a compensation element which is mounted on the hub element such that it can rotate about an axis of rotation J and which has an eccentrically arranged slotted hole extending in the radial direction relative to the axis of rotation J, wherein a second eccentric pin of the driveshaft is guided in the slotted hole of the compensation element such that a Scotch yoke is formed between the slotted hole and the axis of rotation J of the compensation element. The invention also relates to a displacement machine comprising a compensation mechanism of this type.