Basket Mill Sealing System Floating Support Plate
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Solution Overview
Problem
Existing immersion mill seals are prone to damage from incorrect gap settings, leading to contamination and high maintenance costs, and are sensitive to vibrations causing grinding media to jam and damage the counter surface.
Innovation Solution
A sealing system featuring a floating support plate with a Teflon sealing ring and a clamping ring, allowing for radial movement and minimizing load on the seal, with a gap larger than the grinding media diameter to prevent damage if the seal fails, and a combination of hard and soft materials for enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a standard seal with two parallel hard metal rings is used, then wear resistance is improved, but the risk of grinding media destruction increases and the seal becomes sensitive to vibrations
Solution Approach 1:
The sealing system uses different materials for different parts: a soft Teflon sealing ring for the sealing surface and hard metal rings for structural support and wear resistance. This local differentiation allows the soft Teflon to accommodate vibrations and prevent grinding media destruction while the hard metal provides necessary durability.
Solution Approach 2:
The seal combines soft Teflon material with hard metal rings to create a composite sealing system. The Teflon ring provides vibration absorption and grinding media protection, while the hard metal rings provide structural strength and wear resistance, resolving the contradiction between wear resistance and reliability.
2Reliability
If the gap size is set small to prevent grinding media escape, then sealing effectiveness is improved, but the risk of grinding media destruction increases
Solution Approach 1:
The sealing system uses different materials for different parts: a soft Teflon sealing ring for the sealing surface and hard metal rings for structural support and wear resistance. This local differentiation allows the soft Teflon to accommodate vibrations and prevent grinding media destruction while the hard metal provides necessary durability.
Solution Approach 2:
The seal combines soft Teflon material with hard metal rings to create a composite sealing system. The Teflon ring provides vibration absorption and grinding media protection, while the hard metal rings provide structural strength and wear resistance, resolving the contradiction between wear resistance and reliability.
3Reliability
If a floating support plate with Teflon sealing ring is used, then vibration absorption is improved, but device complexity increases
Solution Approach 1:
The sealing system uses different materials for different parts: a soft Teflon sealing ring for the sealing surface and hard metal rings for structural support and wear resistance. This local differentiation allows the soft Teflon to accommodate vibrations and prevent grinding media destruction while the hard metal provides necessary durability.
Solution Approach 2:
The seal combines soft Teflon material with hard metal rings to create a composite sealing system. The Teflon ring provides vibration absorption and grinding media protection, while the hard metal rings provide structural strength and wear resistance, resolving the contradiction between wear resistance and reliability.
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 solution reduces the risk of grinding media contamination and damage, simplifies maintenance, and absorbs shaft vibrations, ensuring the grinding media can escape if the seal fails, thus reducing wear and maintenance costs.
Implementation Method 1
a Teflon sealing ring (13) which surrounds the agitator shaft (4) and prevents radial movement of the support plate (20), thereby minimizing the load on the seal
Implementation Method 2
spring elements (22) which pull the support plate (20) downward onto a sliding surface
Implementation Method 3
driver pins (28) which prevent the support plate (20) from rotating
Implementation Method 4
absorbs shaft vibrations, ensuring the grinding media can escape if the seal fails, thus reducing wear and maintenance costs
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Immersion mill driven about a stirring shaft (4), comprising a grinding chamber seal between the stirring shaft (4) and a grinding chamber formed by a grinding chamber housing (11), with a slotted screen (8) forming a side wall of the grinding chamber housing (11), with a sealing ring (13) or two slotted rings (32, 33) sealing the grinding chamber housing (11) against the stirring shaft, characterized by a support plate (20) arranged around the stirring shaft and receiving the sealing ring (13) or the outer slotted ring, wherein the support plate (20) is floating in relation to the grinding chamber housing without rotating with the stirring shaft.