Impact Crusher Retaining Device for Dynamic Gap Adjustment
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Solution Overview
Problem
Existing impact crushers require complex and time-consuming procedures to adjust the crushing gap, which cannot be altered during operation, leading to downtime and inefficiencies due to fixed stop adjustments and potential unintentional contact between the impact rocker and rotor.
Innovation Solution
A retaining device with a flexible clamping element opposes the swiveling of the impact rocker, providing a retaining force to prevent unintentional contact and allowing gap adjustment during operation by counteracting the retaining force with the gap-adjusting means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed stop is used to limit the swiveling motion of the impact rocker, then the structure is simple, but the crushing gap cannot be adjusted during operation, causing downtime and reducing productivity
Solution Approach 1:
The patent replaces the fixed stop with an adjustable stop that can be repositioned during operation. The adjustable stop is mounted on a guide rail or similar mechanism, allowing it to be moved along the adjustment path of the impact rocker. This enables dynamic adjustment of the crushing gap without stopping the crusher, resolving the contradiction between ease of operation and productivity.
Solution Approach 2:
The patent introduces an intermediary adjustment mechanism between the fixed stop and the impact rocker. This intermediary device (such as a threaded rod, hydraulic cylinder, or electric motor) allows for precise and flexible adjustment of the stop position, enabling gap modification during operation without requiring complete disassembly or system shutdown.
2Manufacturing precision
If a complex adjustment procedure with multiple steps is used to change the crushing gap, then the gap can be precisely set, but the adjustment process becomes time-consuming and reduces productivity
Solution Approach 1:
The patent implements preliminary positioning features such as indexed adjustment positions or pre-set gap widths that allow operators to quickly select common gap settings without complex measurements. For precise adjustments, the system provides continuous adjustment capability along the guide rail, eliminating the need for multiple discrete adjustment steps and reducing overall adjustment time while maintaining precision.
Solution Approach 2:
The patent replaces complex manual mechanical adjustment procedures with automated or semi-automated adjustment mechanisms. Examples include electric motors with encoders for precise positioning, hydraulic cylinders with position feedback, or even automated adjustment systems controlled by the crusher's PLC, which can set the gap width electronically without manual intervention, thereby reducing adjustment time while maintaining or improving precision.
3Device complexity
If the impact rocker is mounted with weight force acting toward gap reduction, then the structure is simplified, but unintentional contact between the impact rocker and rotor may occur, reducing reliability
Solution Approach 1:
The patent applies preliminary counteracting forces through spring elements or hydraulic dampers that oppose the weight force of the impact rocker. These elements are pre-loaded to provide a retaining force that prevents the rocker from swiveling too far toward the rotor under normal operating conditions, while still allowing controlled adjustment when needed. This maintains the simplified mounting structure while preventing unintentional contact.
Solution Approach 2:
The patent incorporates cushioning elements such as springs or dampers in the mounting structure that absorb excess energy or force that might cause the impact rocker to contact the rotor. These cushioning elements are installed beforehand to protect against unexpected movements, vibrations, or load changes that could lead to unintentional contact, thereby maintaining structural simplicity while improving reliability.
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
Enables simplified and safe adjustment of the crushing gap during operation, preventing unintentional contact and reducing downtime by allowing flexible adjustment of the gap width without manual stop adjustments, enhancing operational reliability and safety.
Implementation Method 1
at least one retaining device (50) is provided, which uses a retaining force to flexibly oppose a swiveling of the impact rocker (20) in the direction of the impact rotor (11)
Implementation Method 2
the impact rocker can be swiveled along an adjustment path by means of at least one gap-adjusting means (30) to set a gap width of the crushing gap (15)
Implementation Method 3
the impact rocker is mounted such that its weight force acts in the direction of a reduction of the crushing gap
Data Source
AI summary
The invention relates to a crusher unit (10), in particular an impact crusher, having an impact rotor (11), having at least one swivel-mounted impact rocker (20), wherein a crushing gap (15) is formed between the impact rotor (11) and the impact rocker (20), wherein the impact rocker (20) can be swiveled along an adjustment path by means of at least one gap-adjusting means (30) to set a gap width of the crushing gap (15), wherein the impact rocker (20) is mounted such that its weight force acts in the direction of a reduction of the crushing gap (15). For a high degree of operational safety, the crushing gap can be readjusted during operation in that at least one retaining device (50) is provided, which uses a retaining force to flexibly counteract a swiveling of the impact rocker (20) in the direction of the impact rotor (11). The invention also relates to a method for setting the crushing gap (15) of a crusher unit (10).