Centrifugal Separator Wear Resistance Bushing and Plate Design
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Solution Overview
Problem
Existing centrifugal separators face issues with wear resistance due to abrasive solid phases, leading to complications in construction and maintenance, particularly with the use of bolts through wear resistance members which can compromise strength and require frequent replacement.
Innovation Solution
The use of bushing members with mantle portions that securely surround distance members, eliminating the need for external bolts and allowing for high-quality wear-resistant materials like tungsten carbide, along with plate members that overlap to secure position, reducing the risk of removal and enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If L-shaped wear resistance members are used to protect distance members, then wear resistance is improved, but device complexity increases due to complicated construction involving many parts to be assembled
Solution Approach 1:
The wear resistance member is divided into two functional segments: a bushing member that surrounds the distance member and a plate member that covers the radial surface. This segmentation allows each part to be optimized for its specific function while simplifying the overall assembly process compared to complex L-shaped members.
Solution Approach 2:
The bushing member is designed to surround and fit onto the distance member, creating a nested structure where the bushing member encloses the distance member. This nesting approach simplifies assembly by eliminating the need for separate mounting operations and reduces the number of fastening components required.
2Reliability
If U-shaped wear resistance members are fastened from outside by bolts, then wear resistance is provided, but strength decreases because bolts counteract centrifugal force and brittle materials may fail
Solution Approach 1:
Instead of fastening the wear resistance member from the outside with bolts that must counteract centrifugal force, the bushing member is designed to be mounted from the inside, fitting onto the distance member. This inversion of the mounting approach eliminates the need for external bolts and allows the structure to better withstand centrifugal forces during operation.
Solution Approach 2:
The bolt fastening system is completely removed from the design. The bushing member is retained through its interference fit with the distance member and the overlapping plate members, eliminating the need for bolts that would compromise the strength of brittle wear resistance materials.
3Reliability
If wear resistance members are fitted before end member assembly, then secure mounting is achieved, but ease of operation decreases due to required dismantling for renewal
Solution Approach 1:
The wear resistance system is segmented into removable plate members that can be accessed and replaced independently. The plate members are designed to be removable from the radial side, allowing maintenance without complete dismantling of the bowl assembly, thus balancing secure mounting with ease of maintenance.
4Productivity
If distance members are exposed to abrasive solid phase, then separation function is maintained, but durability decreases due to abrasion of the bowl at outlets
Solution Approach 1:
The bushing member and plate member act as intermediary protective elements between the abrasive solid phase and the distance members/bowl. These wear resistance members absorb the abrasion damage, protecting the underlying bowl structure while maintaining the separation function of the distance members.
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
This solution provides effective protection against abrasion, simplifies the construction, and extends the interval for wear member renewal, addressing the strength and maintenance challenges of previous designs.
Implementation Method 1
The mantle portion of the bushing member is tubular and circumferentially surrounds the distance member completely, resulting in an effective protection of the outside of the distance members against abrasion
Implementation Method 2
the bushing members are securely carried by the distance members
Implementation Method 3
a centrifugal separator comprising a bowl rotatable around an axis of rotation
Implementation Method 4
the solid phase separated from a feed inside the bowl of the centrifugal separator
Implementation Method 5
wear resistance members cover surfaces defined by the outlet openings
Data Source
AI summary
A centrifugal separator includes a bowl with a conical part with a narrow discharge end comprising a radial surface; an end member opposite the radial surface; a number of distance members extending between the radial surface and the end member and providing outlet openings for a separated solid or heavy phase between adjacent distance members; and wear resistance members covering surfaces at the outlet opening. The wear resistance members include plate members and bushing members. The bushing members include mantle portions surrounding respective distance members. The plate members each cover a portion of the radial surface between adjacent bushing members.