Integrated Motor Scroll Vacuum Pump
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Solution Overview
Problem
Existing scroll vacuum pumps require a large amount of space and are costly to manufacture, with limited pump capacity and reliability in operation.
Innovation Solution
A spiral vacuum pump design featuring a fixed stator and orbiting scroll with an integrated electric motor, utilizing multiple orbiting discs arranged at an angle to enhance performance, and incorporating ball bearings for anti-rotation and mass balancing, along with a two-stage pumping system for increased efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a separate motor is used to drive the orbiting scroll, then the pump can achieve the required orbiting movement, but the installation space requirement increases significantly
Solution Approach 1:
The patent combines the motor and orbiting scroll into a single integrated unit where the motor rotor serves as the orbiting scroll. This merging eliminates the need for a separate motor housing and mounting space, directly resolving the space requirement issue while maintaining the orbiting movement function.
Solution Approach 2:
The motor rotor is designed to serve dual functions: as the rotating component of the motor and as the orbiting scroll that creates vacuum. This multi-functionality eliminates redundant components and reduces the overall device footprint, addressing the space constraint.
2Speed
If the motor is arranged between the scroll disks, then the orbiting movement is achieved, but the device length increases
Solution Approach 1:
The motor and orbiting scroll are merged into a single integrated structure where the motor rotor IS the orbiting scroll. This eliminates the need for separate motor housing and mounting space, directly resolving the space requirement issue while maintaining the orbiting movement function.
3Stability of the object's composition
If additional anti-rotation mechanisms are provided, then the orbiting scroll is prevented from rotating, but the device complexity and manufacturing cost increase
Solution Approach 1:
The shaft with ball bearings inherently prevents rotation of the orbiting scroll through its mechanical design. The ball bearings allow orbital movement while the shaft geometry and bearing arrangement naturally constrain rotational movement, eliminating the need for separate anti-rotation mechanisms.
Solution Approach 2:
The patent removes the need for additional anti-rotation mechanisms by incorporating the anti-rotation function into the basic shaft and bearing structure. The essential anti-rotation capability is extracted from a separate mechanism and integrated into the fundamental support structure.
4Productivity
If a two-stage design with multiple orbiting discs is implemented, then the pump performance increases significantly, but the device complexity increases
Solution Approach 1:
The pump is divided into multiple stages with separate orbiting discs and stators, where each stage contributes to the overall pump performance. This segmentation allows independent optimization of each stage while achieving high overall productivity through the combined effect of multiple stages working in sequence.
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 design significantly increases pump performance while reducing space requirements, improving reliability and manufacturing costs, and eliminating the need for additional anti-rotation mechanisms.
Implementation Method 1
The moveable scroll orbits the axis of the drive shaft as the drive shaft rotates. The movable scroll must be prevented from rotating about its own axis.
Implementation Method 2
The mounting of the at least one orbiting disk by means of the at least two shafts mounted in ball bearings in the stator has the advantage that the two shafts constitute an anti-rotation mechanism without additional anti-rotation mechanisms having to be provided.
Implementation Method 3
A spiral vacuum pump consists of two spiral cylinders plugged into each other (Archimedean spirals). One of these spirals is fixed, the other moves via an eccentric drive on a circular path.
Implementation Method 4
If, according to the invention, a stator is provided and two orbiting disks are arranged on both sides of the stator, mass balancing takes place if the disks are arranged diametrically opposite one another, for example.
Data Source
Figure 1
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AI summary
A spiral vacuum pump with a stationary first spiral and an orbiting second spiral engaging therein, in which an electric motor is provided for the drive, which is integrated in and/or on at least one orbiting disk and corresponding to the at least one disk in the spiral vacuum pump, which is designed as an electric motor which, in an activated state, causes an orbiting movement of the disk relative to the stator and thus the orbiting movement of the second spiral with respect to the first spiral, and in which the at least one orbiting disk is supported by means of at least one shaft ball-bearing mounted in the stator, or the spiral vacuum pump has at least two pumping stages.