Rotating Insert Hammer Strike Iron for Comminution Machine Gap Adjustment
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Solution Overview
Problem
Crushing machines with fixed anvils face challenges in maintaining the optimal gap between the hammer head and anvil due to wear, leading to reduced service life and increased operating costs, as existing solutions require replacing the hammer, which is time-consuming and expensive.
Innovation Solution
A pivotably attached hammer with an insert piece that can be rotated 180° to adjust the distance between the hammer head and anvil, utilizing cheeks of different thicknesses to maintain the desired gap, allowing for the use of interchangeable inserts to adapt to wear, thereby extending the hammer's service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the hammer is used continuously without replacement, then operating costs are reduced, but the gap between hammer head and anvil deviates from specifications due to wear
Solution Approach 1:
The insert piece is designed to be rotatable within the hammer head, allowing the gap distance to be dynamically adjusted by rotating the insert 180 degrees. This transforms a static hammer into a dynamically adjustable tool that can compensate for wear over time.
Solution Approach 2:
The invention changes the parameter of gap distance by providing an insert piece with asymmetric cheek thicknesses. By rotating the insert, the effective thickness changes from (a+b) to (a-b), thereby adjusting the gap distance between hammer head and anvil to maintain specification compliance.
2Manufacturing precision
If the hammer is replaced frequently to maintain gap specifications, then manufacturing precision is maintained, but time consumption and operating costs increase
Solution Approach 1:
Instead of replacing the entire hammer, the invention allows dynamic adjustment of the gap by rotating the insert piece 180 degrees. This simple rotation operation takes minimal time compared to complete hammer replacement and restoration processes.
Solution Approach 2:
The hammer is segmented into the hammer head and the removable insert piece. Only the insert needs to be rotated or replaced, not the entire hammer, significantly reducing maintenance time and effort.
3Duration of action of moving object
If the gap between hammer head and anvil is increased to accommodate wear, then hammer service life is extended, but the fineness of shredded material deteriorates
Solution Approach 1:
The invention provides a mechanism to change the effective parameter of gap distance by rotating the insert piece. This allows the gap to be maintained within specifications even as the hammer undergoes wear, preventing deterioration of material fineness while extending service life.
Solution Approach 2:
The insert piece can be periodically rotated 180 degrees to compensate for wear accumulation. This periodic adjustment action maintains the gap within specifications over extended periods, allowing the hammer to serve longer while consistently producing desired grain size.
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 extends the service life of the hammer, reduces operating costs, and ensures consistent product quality by allowing for precise adjustment of the gap between the hammer head and anvil, even as the hammer wears, using interchangeable inserts with varying cheek thicknesses.
Implementation Method 1
hammer irons (also referred to as hammers in the following) are pivotably attached to a rotor with a pivot pin and, when the rotor rotates, radially outwards due to the centrifugal forces generated during rotation
Data Source
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AI summary
The invention relates to a comminution machine having a stationary anvil and rotating hammer strike iron. In such machines, when hammer heads are worn out, the entire hammer strike iron must always be replaced, insofar as a uniform quality is to be achieved in the comminuted material. This is very cost-intensive. The invention thus proposes a novel hammer strike iron having an insert piece which has a cylindrical, eccentric bore or an eccentric oblong hole for receiving a swivel pin of the comminution machine. Said insert piece has cheeks of differing thickness on both ends, such that, by rotating the insert piece in the hammer strike iron by 180°, the distance between the hammer head and the anvil can be varied. If a hammer head has been inadmissibly worn, the insert piece can be removed, turned 180°, and and reinstalled. The gap between the anvil and the hammer head can thus be uniformly regulated.