Hydraulic Valve Switching for Adjustable Comminution Pressure
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Solution Overview
Problem
Conventional shredding devices lack user-friendly and space-saving designs, leading to inefficient energy use, accelerated wear, and high maintenance costs due to the inability to adjust shredding performance to individual requirements and varying applications.
Innovation Solution
A comminution device with a valve device that hydraulically couples to a power transmission unit, adjusting element actuation unit, and locking chamber, allowing flexible control of contact pressure and sealing chamber pressure through switching states, reducing the need for multiple hydraulic circuits and simplifying maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional shredding devices are designed with fixed shredding capacity, then the device structure is simple, but the device cannot adapt to different applications and requirements
Solution Approach 1:
The patent implements dynamic adjustability of the shredding device by allowing the cutting device to be displaced along the axis of rotation, enabling continuous adjustment of the contact pressure between cutting elements. This dynamic adjustment mechanism allows the device to adapt to different shredding requirements without requiring multiple fixed-capacity devices, thereby improving versatility while maintaining reasonable structural complexity.
2Productivity
If the cutting device is made adjustable to meet varying requirements, then shredding performance can be optimized, but the device size and complexity increase
Solution Approach 1:
The adjusting element is disposed inside the drive hollow shaft, creating a nested arrangement where the adjustment mechanism is contained within the existing structural envelope. This nesting approach allows for adjustable shredding performance without significantly increasing the overall device volume, as the adjustment components utilize the internal space of the drive shaft rather than requiring additional external space.
3Ease of operation
If multiple hydraulic circuits are used for different functions, then control precision is improved, but the number of parts and maintenance effort increase
Solution Approach 1:
The patent employs a single power transmission unit that serves multiple functions: it provides hydraulic pressure for both the barrier chamber sealing and the adjusting element actuation. The power transmission unit can be selectively coupled to different hydraulic circuits through a valve device, allowing one hydraulic source to perform multiple functions that would traditionally require separate hydraulic systems. This reduces the number of pumps and hydraulic circuits while maintaining the ability to independently control different functions.
4Productivity
If the device is designed for maximum shredding capacity, then productivity is improved, but energy consumption increases and wear accelerates
Solution Approach 1:
The patent enables dynamic adjustment of the contact pressure between cutting elements by varying the position of the adjusting element along the axis of rotation. This allows the operator to optimize the contact pressure parameter according to the specific application requirements, material being shredded, and desired throughput. By adjusting rather than maximizing the contact pressure continuously, the system can reduce energy consumption and wear when maximum shredding capacity is not required, while still achieving high productivity when needed.
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 efficient, versatile operation with reduced parts and maintenance effort, optimizing shredding performance and service life by allowing adjustable contact pressure and sealing without increasing device size.
Implementation Method 1
a hydraulic adjusting element actuation unit (50) which is coupled to the drive hollow shaft (10) and the adjusting element (11) for displacing the cutting device (20) and can be hydraulically coupled to a power transmission unit (70)
Implementation Method 2
a barrier chamber (80) which is arranged adjacent to the comminution chamber (30) and seals the comminution chamber (30) against the escape of the solid-containing medium from the comminution chamber (30) at the drive hollow shaft (10)
Implementation Method 3
the first cutting element (21) and the second cutting element (22) are arranged to be movable relative to each other in such a way that a rotational movement of the first cutting element (21) relative to the second cutting element (22) about the axis of rotation (A) causes a shearing action between the at least one first cutting edge and the at least one second cutting edge
Data Source
Figure 1
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AI summary
A comminution device (1) for comminuting a medium containing solids, characterized in that a valve device (60) is hydraulically coupled to the power transmission unit (70) at a first valve hydraulic connection (V1) of the valve device (60), is hydraulically coupled to the adjusting element actuation unit (50) at a second valve hydraulic connection (V2) of the valve device (60), is hydraulically coupled to the locking chamber (80) at a third valve hydraulic connection (V3) of the valve device (60), and the valve device (60) is switchable back and forth between at least a first switching state and a second switching state different from the first switching state, wherein in the first switching state, in order to set a position of the first cutting element (21) relative to the second cutting element (22) along a translational movement path,the power transmission unit (70) is hydraulically coupled to the adjusting element actuating unit (50) and hydraulically decoupled from the locking chamber (80), and in the second switching state, for setting a pressure within the locking chamber (80), the power transmission unit (70) is hydraulically coupled to the locking chamber (80) and hydraulically decoupled from the adjusting element actuating unit (50).