Vacuum Pump Bottom Fixing Member Torque Absorption
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Solution Overview
Problem
Existing vacuum pump designs require a large bottom-side fixing structure to withstand impact from breakdown torque, leading to increased size and complexity.
Innovation Solution
The vacuum pump incorporates a bottom fixing member with a second flat surface facing a first flat surface on the vacuum pump main body, allowing the breakdown torque to be absorbed by surface contact, thereby reducing the number and strength of fastening members and decreasing the bolt pitch circle diameter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the number of bolts, strength of bolt, and bolt pitch circle diameter are increased to ensure strength against impact upon breakdown of rotor, then the strength withstanding impact of breakdown torque is improved, but the size of the bottom-side fixing structure increases
Solution Approach 1:
The patent applies beforehand cushioning by providing a cushioning member (such as a rubber cushion or spring element) between the bottom fixing plate and the pump main body. This cushioning member absorbs and attenuates the impact force generated during rotor breakdown before it reaches the fastening members, thereby protecting the fixing structure from excessive stress without requiring oversized bolts or a large pitch circle diameter.
2Reliability
If a bottom fixing plate with multiple fastening members is used to ensure strength against impact, then the reliability of the fixing structure is improved, but the device complexity increases
Solution Approach 1:
The cushioning member is installed in advance between the bottom fixing plate and the pump main body to absorb impact forces during rotor breakdown. This pre-installed protective element enhances the reliability of the fixing structure by preventing impact transmission, while simultaneously reducing the need for multiple heavy-duty fastening members, thus simplifying the overall fixing structure.
Data Source
AI summary
A vacuum pump includes a vacuum pump main body and a bottom fixing member. The vacuum pump main body has a bottom surface and a side surface. The side surface has a pump-side flat surface formed so as to extend from the bottom surface. The bottom fixing member is fastened to the bottom surface of the vacuum pump main body. The bottom fixing member has a fixing-side flat surface facing the pump-side flat surface.