Integrated Scroll Pump Crank Sleeve for Vibration Balancing
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Solution Overview
Problem
Existing scroll pumps face challenges in balancing unbalanced internal loads and require multiple components, complicating manufacture and hindering miniaturization.
Innovation Solution
A crank sleeve with an integrally formed counterbalance and eccentric member that provides a crank offset, directly engaging a bearing unit, reduces parts count and simplifies assembly, while stabilizing attachment to the drive shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a separate counterbalance and crank sleeve are used in conventional scroll pumps, then the unbalanced internal loads are reduced, but the device complexity increases due to requiring multiple components and alignment keys
Solution Approach 1:
The patent combines the counterbalance and crank sleeve into a single integrated crank sleeve component. The counterbalance is formed as an integral part of the crank sleeve, eliminating the need for separate counterbalance components and alignment keys. This merging reduces the number of parts while maintaining the vibration reduction function, directly resolving the technical contradiction between harmful vibrations and device complexity
2Object-affected harmful factors
If multiple components are used in conventional scroll pumps, then the balancing function is achieved, but the ease of manufacture deteriorates due to complex assembly requirements
Solution Approach 1:
The counterbalance and crank sleeve are merged into a single monolithic component that can be manufactured as one piece. This integration eliminates the need for precise alignment and assembly of multiple parts, significantly simplifying the manufacturing process while maintaining the unbalanced internal loads reduction function
3Object-affected harmful factors
If conventional crank sleeves with separate counterbalances are used, then vibration reduction is achieved, but the productivity decreases due to longer assembly time
Solution Approach 1:
The integrated crank sleeve design allows the counterbalance to be formed simultaneously with the crank sleeve in a single manufacturing operation. This eliminates the separate assembly steps required for conventional designs, reducing assembly time and improving productivity while maintaining vibration reduction performance
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 integrated crank sleeve design enhances stability, reduces vibration, and simplifies manufacturing, enabling more compact scroll pump designs.
Implementation Method 1
the first portion of the crank sleeve has an external surface coupled to the inner race of a rolling element bearing unit, the outer race of the bearing unit being coupled to the orbiting scroll
Data Source
Figure 1~2
AI summary
The invention provides a crank sleeve for a scroll pump. The crank sleeve has a longitudinal axis and is configured to provide a radially extending crank offset for imparting an orbital path on an orbital scroll of the scroll pump. The crank sleeve further comprises an integrally formed counterbalance for reducing pump vibration extending radially in a direction substantially opposite to the crank offset.