Impact Crusher Clamping Wedge Maintenance Mechanism
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Solution Overview
Problem
The maintenance of blow bars in impact crushers is time-consuming, costly, and hazardous due to the need to loosen and remove multiple screw connections and clamping wedges, which complicates the removal and replacement of blow bars.
Innovation Solution
The clamping wedge is designed to move from a clamping position to a maintenance position, allowing it to remain on the rotor disk during maintenance, eliminating the need to dismantle it. This is achieved through a positioning device that guides the clamping wedge's movement, enabling it to pivot and slide into a maintenance position, allowing for the removal and replacement of blow bars without disassembling the clamping wedge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the clamping wedge is fixed to the rotor disk using screw connections, then the blow bar is securely clamped during operation, but the clamping wedge and screw connections must be dismantled for maintenance of the blow bar
Solution Approach 1:
The clamping wedge is designed to be movable relative to the rotor disk, transitioning between a clamping position (secured by first screw connection) and a maintenance position (where the wedge can be shifted to release the blow bar). This dynamic capability allows the same component to serve both secure clamping during operation and easy maintenance during service.
Solution Approach 2:
The fastening system is divided into two independent screw connections: a first screw connection that secures the clamping wedge in the clamping position, and a second screw connection that can be used to release or adjust the wedge. This segmentation allows selective loosening of connections for maintenance without complete disassembly.
2Ease of repair
If multiple screw connections and clamping wedges are removed for blow bar maintenance, then the blow bar can be accessed and replaced, but the maintenance process becomes time-consuming and hazardous
Solution Approach 1:
The clamping wedge's ability to move between clamping and maintenance positions enables quick access to the blow bar without complete disassembly. Maintenance personnel only need to loosen the second screw connection and shift the wedge, rather than removing multiple fasteners, significantly reducing maintenance time.
Solution Approach 2:
The invention extracts the essential clamping function from the screw connections by using the movable wedge mechanism. The first screw connection maintains the wedge in position during operation, but the second screw connection can be selectively loosened to release the wedge for maintenance, separating the operational securing function from the maintenance access requirement.
3Strength
If the clamping wedge is made heavy for secure clamping, then the blow bar is firmly held, but the wedge becomes difficult to handle during maintenance
Solution Approach 1:
The clamping wedge is designed to be movable rather than fixed, allowing it to be shifted along the rotor disk between clamping and maintenance positions. This dynamic capability reduces the effort needed to handle the heavy wedge during maintenance, as it can be guided along a defined path rather than completely removed and reinstalled.
Solution Approach 2:
The second screw connection acts as an intermediary mechanism that facilitates the movement of the heavy clamping wedge. By loosening this connection, the wedge can be easily shifted to the maintenance position without requiring manual handling of the entire heavy component, reducing the physical effort and safety risks for maintenance personnel.
Data Source
AI summary
The disclosure relates to an impact crusher having a rotor that has a plurality of rotor disks, wherein each rotor disk has a plurality of edge recesses distributed along its outer circumference. The edge recesses are arranged in alignment with one another and are designed to hold a blow bar. Each edge recess has a first side wall, a second side wall and a bottom wall. A clamping wedge with a clamping wall is arranged on the second side wall of each edge recess. The clamping wedge is fixable to the second side wall in a clamping position in which the clamping wall of the clamping wedge is arranged so as to clamp the blow bar. The clamping wedge is mounted on the second side wall so as to be movable from the clamping position into a maintenance position, in which the clamping wall of the clamping wedge is arranged to release the blow bar.