Scroll Vacuum Pump Axial Seal Adjustment Mechanism
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Solution Overview
Problem
In scroll pumps, especially vacuum types, solid non-energized tip seals require precise axial alignment and dimensions to maintain effective sealing, but are prone to excessive friction and wear, leading to potential damage and reduced lifespan, and existing adjustment methods are time-consuming and require disassembly.
Innovation Solution
A scroll pump design that includes a flexure and an adjusting member, allowing for manual adjustment of tip seal axial disposition without disassembling significant parts, using a threaded fastener to adjust the axial position of the orbiting plate scroll relative to the stationary plate scroll, thereby optimizing the seal clearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If solid non-energized tip seals are used in scroll pumps, then the seal effectiveness is improved, but the friction and wear between the tip seal and the opposing plate increase excessively
Solution Approach 1:
The patent introduces a spring mechanism that applies dynamic axial force to the orbiting plate scroll, enabling the tip seal to maintain optimal contact pressure with the opposing plate throughout the orbital motion cycle. This dynamic adjustment ensures effective sealing while preventing excessive friction and wear by automatically adapting to varying operating conditions
Solution Approach 2:
The invention changes the axial position parameter of the orbiting plate scroll relative to the stationary plate scroll through spring-induced axial displacement. This parameter change allows the tip seal to engage the opposing plate at the correct axial position, achieving effective sealing while controlling friction and wear through proper clearance management
2Manufacturing precision
If traditional adjustment methods are used for tip seal axial alignment, then the axial alignment precision is improved, but the maintenance time and disassembly requirements increase
Solution Approach 1:
The spring mechanism automatically maintains the correct axial alignment between the tip seal and the opposing plate through its elastic properties. The system self-adjusts to compensate for wear and dimensional variations, eliminating the need for frequent manual adjustments and complex disassembly procedures while maintaining precise axial alignment
Solution Approach 2:
The adjustable axial position mechanism, facilitated by the spring and supporting structures, allows for easy manual adjustment during assembly or maintenance. The dynamic design enables quick repositioning of the orbiting plate scroll to achieve precise axial alignment without requiring complete disassembly of the pump head
Data Source
AI summary
A vacuum type of scroll pump includes a frame, a stationary plate scroll, an orbiting plate scroll, a non-energized type of tip seal or seals, an eccentric drive mechanism assembled to and supported by the frame and to which the orbiting plate scroll is assembled so as to be drivable by the eccentric drive mechanism in an orbit about a longitudinal axis of the pump, and a mechanism for adjusting the seal(s) created by the tip seal(s) without having to disassemble any of the frame, plate scrolls or parts of the eccentric drive mechanism from one another, i.e., while a pump head assembly of the pump remains intact.