Scroll Vacuum Pump Bearing Layout for Simpler Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing scroll vacuum pumps face inefficiencies in suction capacity and assembly complexity due to conventional design limitations, particularly in the arrangement of drive motors and balancing weights, which affect their performance and maintenance.
Innovation Solution
Optimizing the groove depth-to-width ratio of spiral components to enhance suction capacity, rearranging the drive motor within the pump housing, utilizing a cantilever bearing system, and employing innovative balancing weight designs with varying materials and configurations to simplify assembly and improve performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the groove depth-to-width ratio of spiral components is optimized to enhance suction capacity, then the suction capacity is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies parameter changes by optimizing the groove depth-to-width ratio within a specific range (3.7 to 4.2) to enhance suction capacity. This involves adjusting the geometric parameters of the spiral grooves to achieve optimal fluid flow characteristics while maintaining manufacturability.
2Ease of manufacture
If the drive motor is rearranged within the pump housing using a cantilever bearing system, then assembly is simplified and maintenance is reduced, but the structural complexity of the bearing system increases
Solution Approach 1:
The patent applies segmentation by separating the bearing system into distinct components: a fixed bearing support and a movable bearing support that moves with the orbiting spiral component. This segmentation allows for simplified assembly and maintenance while managing structural complexity through modular design.
Solution Approach 2:
The patent applies dynamics by implementing a cantilever bearing system where the movable bearing support follows the orbiting motion of the spiral component. This dynamic arrangement simplifies assembly and maintenance procedures while managing structural complexity through controlled motion.
3Reliability
If balancing weights with varying materials and configurations are employed, then performance is improved and assembly is simplified, but the device complexity increases
Solution Approach 1:
The patent applies composite materials by utilizing different material densities for balancing weights to achieve optimal balancing performance. The system employs a first balancing weight with a first material density and a second balancing weight with a second material density, allowing for precise performance tuning while managing complexity through standardized configurations.
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 optimized designs achieve higher suction capacity with simplified assembly and reduced maintenance, enabling efficient operation and cost-effective production across various scroll vacuum pump systems.
Implementation Method 1
a drive shaft that rotates about an axis of rotation during operation and has an eccentric section for driving the movable spiral component
Implementation Method 2
A scroll vacuum pump is a positive displacement pump that compresses against atmospheric pressure
Data Source
Figure 1a
Figure 1b
Figure 2a
AI summary
The invention relates, among other things, to a scroll vacuum pump with a pumping system, a drive shaft having an eccentric section for driving the pumping system, and an electric drive motor for the drive shaft, wherein at least two bearing points spaced apart from each other along the axis of rotation of the drive shaft are provided for the rotary bearing of the drive shaft, and wherein all bearing points are located on the side of the drive motor facing the eccentric section of the drive shaft and/or between a front balancing weight and a rear balancing weight of the drive shaft.