Adjustable Eccentricity Crusher via Hydraulic Bushing
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Solution Overview
Problem
Existing crushers with eccentric elements require complex and fault-prone mechanisms for adjusting crushing movements, necessitating permanent monitoring and multiple components for torque transmission, which complicates the process of varying crushing forces and preventing overload.
Innovation Solution
Incorporating an eccentric bushing with a pressure medium chamber that allows for hydraulic pressurization to vary the frictional engagement between the eccentric element and the bushing, enabling easy adjustment and overload prevention by changing the contour of the bushing's active surface, thus allowing for adjustable crushing movements without complex mechanical means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a complex adjustment unit with multiple shafts and pinions is used to adjust eccentricity, then the crushing movement can be varied, but the device complexity increases and reliability decreases due to numerous fault-prone components
Solution Approach 1:
The patent extracts the adjustment function from the complex mechanical transmission system (shafts and pinions) and relocates it to the hydraulic pressure medium chamber. By injecting pressure medium into the chamber, the eccentric bushing's outer contour changes, directly adjusting the eccentricity without requiring separate adjustment mechanisms. This separates the adjustment function from the torque transmission function.
Solution Approach 2:
The patent replaces the mechanical adjustment system (multiple shafts, pinions, and toothings) with a hydraulic system. The pressure medium chamber uses hydraulic pressure to deform the eccentric bushing, substituting mechanical torque transmission with hydraulic pressure application. This eliminates the need for complex mechanical adjustment units while maintaining adjustability.
2Power
If multiple shafts and toothings are used for torque transmission, then the eccentric bushings can be driven, but the reliability decreases due to numerous fault-prone components requiring permanent monitoring
Solution Approach 1:
The patent uses hydraulic pressure medium to transmit the force needed to deform the eccentric bushing. The pressure medium chamber receives hydraulic pressure that directly acts on the bushing material, eliminating the need for mechanical shafts and toothings for torque transmission. This hydraulic approach simplifies the power transmission path and removes multiple potential failure points.
Solution Approach 2:
The patent changes the physical state of the pressure medium (from unpressurized to pressurized) to achieve adjustment. By varying the pressure parameter of the hydraulic medium, the eccentric bushing's contour is dynamically changed, enabling torque transmission and eccentricity adjustment without complex mechanical linkages. This parameter-based control improves reliability by eliminating mechanical wear components.
3Device complexity
If the eccentric bushing is rigidly fixed, then the structure is simple, but the adaptability decreases as crushing movements cannot be easily varied
Solution Approach 1:
The patent makes the eccentric bushing dynamically adjustable by introducing the pressure medium chamber. The bushing transitions from a fixed rigid structure to a dynamically deformable component. By controlling the pressure medium injection, the bushing's outer contour can be changed in real-time, allowing the crusher to adapt to different crushing requirements while maintaining a simple overall structure.
Solution Approach 2:
The patent uses parameter changes (pressure medium pressure) to control the bushing's geometry. The physical state of the pressure medium directly influences the bushing's outer contour, enabling continuous adjustment of eccentricity. This allows the structure to remain simple while achieving high adaptability through parameter control rather than mechanical reconfiguration.
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 simplifies the adjustment of crushing movements, provides an overload prevention mechanism, and allows for efficient variation of crushing forces by varying the frictional engagement, reducing the risk of damage and eliminating the need for permanent monitoring of drive units.
Implementation Method 1
an eccentric bushing with a pressure medium chamber that allows for hydraulic pressurization to vary the frictional engagement between the eccentric element and the bushing
Implementation Method 2
vary the frictional engagement between the eccentric element and the bushing, enabling easy adjustment and overload prevention by changing the contour of the bushing's active surface
Data Source
AI summary
A crusher may include a crushing member that is driven in an operatively connected manner by way of an eccentric element such that material to be crushed can be comminuted by way of a crushing movement generated at least in part by the eccentric element. At least one eccentric bushing may be connected by way of an active surface to the eccentric element by way of frictional engagement. The eccentric bushing may have a pressure medium chamber that uses pressure to vary the frictional engagement between the eccentric element and the eccentric bushing. In some examples, the crusher may be of a jaw type or a cone type.