Flexible Crusher Scraper Blade for Moist Earth Buildup
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Solution Overview
Problem
Existing cone crushers face challenges in efficiently removing earth material, particularly moist earth material, from the dust collar due to limited scraping capabilities and material buildup, which can lead to decreased operational efficiency and potential damage from uncrushable objects.
Innovation Solution
A scraper blade with flexible blade members and protruding ploughing members is designed to displace earth material by engaging with the dust collar and rotating shaft, featuring angled mouldboards and cutting edges to facilitate efficient scraping, even in agglomerated conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional scraper blade is used, then the structure is simple, but the scraping capability is insufficient and cannot effectively remove moist earth material
Solution Approach 1:
The scraper blade is divided into multiple functional segments: a flexible blade member for base scraping, and multiple ploughing members with mouldboards and cutting edges for penetrating and displacing agglomerated material. This segmentation allows each component to perform a specific function, significantly improving overall scraping capability while maintaining manageable structural complexity.
Solution Approach 2:
The scraper incorporates a composite structure combining a flexible blade member (likely rubber or polymer material) with rigid ploughing members featuring metal cutting edges and mouldboards. This composite design leverages the flexibility and wear resistance of the blade member together with the cutting power of the ploughing members, achieving effective removal of both loose and agglomerated earth material.
2Productivity
If the scraper blade is made rigid to improve scraping force, then the scraping effectiveness increases, but the ability to adapt to material buildup and maintain contact with the dust collar decreases
Solution Approach 1:
The scraper blade employs a flexible blade member that can dynamically adapt its shape and position in response to material buildup on the dust collar. This flexibility ensures continuous contact and effective scraping even when material accumulates, while the rigid ploughing members provide the necessary scraping force when engaged with the material.
Solution Approach 2:
Different parts of the scraper have different mechanical properties: the blade member is flexible to adapt to surface variations and maintain contact, while the ploughing members are rigid to provide concentrated cutting force. This local differentiation of material properties allows the scraper to simultaneously adapt to material buildup and maintain effective scraping action.
Data Source
Figure 1a~1b
Figure 2a~3b
Figure 4
AI summary
In one aspect there is provided scraper (140) for a crusher (100), comprising a flexible blade member (141) having a first end portion (114) configured for operative coupling with a rotatable shaft (110) of the crusher (100), and a forward face (118) adapted to face in a rotation direction (S) of the shaft (110), and a second end portion (116) provided with at least one ploughing member (142) projecting from the forward face (118).