Scroll Compressor Compensation Mechanism for Sealing and Vibration
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Solution Overview
Problem
Existing scroll compressors face challenges in achieving effective vibration reduction with minimal component complexity, particularly due to manufacturing tolerances and the need for improved sealing between nested displacement spirals.
Innovation Solution
A balancing mechanism for scroll compressors is introduced, featuring a drive shaft with a central axis and a balancing device comprising a cylindrical hub element and a balancing element with an eccentrically arranged elongated hole, forming a crank loop that limits radial movement and combines oscillating and linear motion to compensate for manufacturing tolerances and reduce vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a compensation mechanism is added to reduce vibrations and improve sealing, then vibration reduction and sealing effectiveness are improved, but device complexity increases
Solution Approach 1:
The patent combines the compensation mechanism and balancing mechanism into a single integrated device. The compensation element with its elongated hole and the balancing element with counterweight are merged into one component that performs both sealing compensation and vibration reduction functions simultaneously, rather than using separate mechanisms for each function.
Solution Approach 2:
The compensation element serves multiple functions: it compensates for manufacturing tolerances to ensure sealing between the displacement spirals, simultaneously acts as a balancing element to reduce vibrations, and guides the orbital motion of the movable spiral. This multi-functionality reduces the need for additional separate components.
2Manufacturing precision
If manufacturing tolerances are tightened to improve sealing, then sealing effectiveness improves, but manufacturing cost and difficulty increase
Solution Approach 1:
The invention introduces a compensation element with an elongated hole that allows for parameter adjustment in the radial direction. This element compensates for manufacturing tolerances by enabling positional adjustment, thereby maintaining effective sealing without requiring extremely tight manufacturing tolerances for all components.
Solution Approach 2:
The compensation element acts as an intermediary between the drive shaft and the movable displacement spiral. It absorbs and compensates for manufacturing tolerances and wear, ensuring that the sealing function is maintained even when other components have standard manufacturing tolerances.
3Object-affected harmful factors
If a complex balancing mechanism is used to reduce vibrations, then vibration reduction improves, but device complexity and component count increase
Solution Approach 1:
The balancing element incorporates a counterweight that is eccentrically arranged relative to the rotation axis. This counterweight generates balancing forces that counteract the vibrations produced by the orbital motion of the movable displacement spiral, achieving vibration reduction through a simple counterweight mechanism rather than a complex multi-component system.
Solution Approach 2:
The balancing function is merged into the compensation element itself. The same component that compensates for sealing tolerances also contains the counterweight for vibration balancing, eliminating the need for a separate balancing mechanism and reducing overall device complexity.
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 effectively seals between displacement spirals and reduces vibrations by utilizing a crank loop movement, ensuring smooth operation and reduced noise with minimal component complexity.
Implementation Method 1
A second eccentric journal of the drive shaft is guided in the elongated hole of the balancing element such that a crank loop is formed between the elongated hole and the axis of rotation J of the balancing element
Implementation Method 2
the center of gravity of the compensating element exhibits a pendulum component during operation, wherein the center of gravity oscillates about a connecting line JQ between the axis of rotation J of the compensating element and a central axis Q of the elongated hole
Implementation Method 3
The hub element is rotatably mounted about an axis of rotation P on a first eccentric journal of the drive shaft
Data Source
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Figure 5
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 (10) with a central axis S and a compensation device (20), which comprises a cylindrical hub element (30) that is mounted on a first eccentric pin (11) of the driveshaft (10) such that it can rotate about an axis of rotation P, and a compensation element (40) which is mounted on the hub element (30) such that it can rotate about an axis of rotation J and which has an eccentrically arranged slotted hole (42) extending in the radial direction relative to the axis of rotation J, wherein a second eccentric pin (12) of the driveshaft (10) is guided in the slotted hole (42) of the compensation element (40) such that a Scotch yoke is formed between the slotted hole (42) and the axis of rotation J of the compensation element (40). The invention also relates to a displacement machine comprising a compensation mechanism of this type.