Jaw Crusher Dynamic Gap Adjustment via Hydraulic Stroke Control
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Solution Overview
Problem
Existing jaw crushers cannot adjust the crushing gap width during operation, requiring shutdown to change the gap width and resulting in inefficiencies, especially when dealing with blockages or varying material sizes.
Innovation Solution
A jaw crusher design with a control device that includes a hydraulic cylinder, control unit, and 4/2-way valve system, allowing for adjustable working stroke within a maximum adjustment stroke, enabling real-time adjustment of the crushing gap width between minimum and maximum values through a control rod and adjusting wheel mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the jaw crusher is equipped with a control device to adjust the crushing gap width, then the adaptability and productivity are improved, but the device complexity increases
Solution Approach 1:
The patent implements dynamic adjustment of the crushing gap width by making the working stroke of the hydraulic piston-cylinder unit adjustable during operation. The control device allows continuous modification of the piston's working stroke length, enabling the system to adapt to different crushing requirements without being fixed in structure.
Solution Approach 2:
The patent changes the working parameter of the hydraulic system by adjusting the working stroke length of the piston-cylinder unit. Through the control device with adjustable stops, the effective working stroke can be varied between minimum and maximum values, thereby changing the crushing gap width and particle size output.
2Adaptability or versatility
If the working stroke of the piston-cylinder unit is changed to adjust grain size, then the adaptability is improved, but the ease of operation deteriorates due to shutdown requirements
Solution Approach 1:
The patent enables dynamic adjustment of the crushing parameters during operation by allowing the working stroke of the piston-cylinder unit to be modified while the crusher is running. This eliminates the need for shutdowns that were previously required to change grain size specifications.
Solution Approach 2:
The patent maintains continuous crushing operation while allowing adjustment of the working stroke. The control device is designed to permit modification of the crushing gap width without interrupting the productive action of the crusher, ensuring uninterrupted material processing.
3Stability of the object's composition
If the flywheel is used as energy store, then the stability is improved, but the productivity deteriorates due to blockage handling requirements
Solution Approach 1:
The patent maintains continuous operation of the flywheel energy storage system while enabling blockage removal through the adjustable working stroke mechanism. The hydraulic system can be adjusted to clear blockages without stopping the flywheel, maintaining both stability and productivity.
Solution Approach 2:
The patent dynamically adjusts the working stroke to handle blockages while the flywheel continues to store energy. The system can modify the piston stroke length to clear obstructions without requiring shutdown of the entire system, particularly maintaining flywheel rotation for energy storage continuity.
Data Source
Figure 1~3
Figure 4~5
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AI summary
The invention relates to a jaw crusher comprising - two opposing crusher jaws (2, 3) which are attached to a jaw crusher frame and at least one crusher jaw of which is a hinged jaw (3), - at least one piston/cylinder unit which can drive the hinged jaw (3) in an oscillating manner, the hydraulic cylinder (5) of which is pivotally mounted, and the piston rod (5.2) of which is hinged to the hinged jaw (3), said piston rod being extendable out of the hydraulic cylinder (5) and retractable back into the cylinder (1) in an oscillating manner, and - a control device with which the crusher gap width between the two crusher jaws (2, 3) can be set. The invention is characterized in that the control device contains a control unit which acts on the piston/cylinder unit and with which a consistent limited pivot range of the hinged jaw (3) can be set within the lower and upper pivot range thresholds.