Comminution Device Lifting Chamber Wall for Tool Access
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Solution Overview
Problem
Maintenance of striking tools in vertical crushing devices is cumbersome due to confined conditions and significant wear, requiring complex and unsafe procedures.
Innovation Solution
A height-adjustable lifting device for the crushing chamber wall allows easy access to striking tools, ensuring safe and efficient maintenance by lifting the wall to expose tools for replacement and repair, with hydraulic cylinders for even weight distribution and safety features like electrical circuit breakers and speed detection to prevent accidental operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the crushing chamber wall is fixed in position, then the structural stability is maintained, but the maintenance of striking tools becomes cumbersome and unsafe
Solution Approach 1:
The crushing chamber wall is made dynamically adjustable in height through a lifting device with hydraulic cylinders, allowing it to transition between a fixed working position and a raised maintenance position. This dynamic capability enables easy access to striking tools while maintaining structural stability during operation.
Solution Approach 2:
A lifting device acts as an intermediary mechanism between the supporting base and the crushing chamber wall. This intermediary system, comprising hydraulic cylinders and support arms, enables controlled vertical movement of the chamber wall to facilitate maintenance without requiring disassembly of the entire device.
2Ease of operation
If the crushing chamber wall is lifted to access striking tools, then maintenance accessibility is improved, but the risk of accidental operation increases
Solution Approach 1:
A feedback-based safety control system monitors the vertical position of the crushing chamber wall through sensors. When the wall is in the raised maintenance position, the control system automatically disables the drive mechanism for the rotors, preventing accidental operation. The system only permits rotor operation when the chamber wall is confirmed to be in the closed working position.
Solution Approach 2:
The control system provides self-service safety protection by automatically detecting the chamber wall position and enabling or disabling the drive mechanism accordingly. This self-monitoring and self-regulating capability ensures that the striking tools can only be operated when the chamber is properly closed, eliminating the need for external safety interventions.
3Stability of the object's composition
If multiple hydraulic cylinders are used to lift the crushing chamber wall, then the lifting stability and evenness are improved, but the device complexity increases
Solution Approach 1:
The lifting device employs a symmetric arrangement of multiple hydraulic cylinders (typically three or four) positioned at equidistant locations around the central axis of the crushing chamber. This symmetric configuration ensures that the weight of the chamber wall is distributed evenly across all cylinders, preventing tilting or uneven lifting while maintaining structural balance.
Solution Approach 2:
The multiple hydraulic cylinders work in parallel to collectively support and counterbalance the weight of the crushing chamber wall. Each cylinder shares the load equally, creating a balanced counterweight system that stabilizes the chamber wall during lifting and positioning, preventing rotational or lateral instabilities.
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
Facilitates easy maintenance and repair of striking tools, enhancing operational safety and reducing maintenance complexity by ensuring tools are accessible only when the device is safely powered down and the chamber is in a secure position.
Implementation Method 1
The lifting device preferably contains at least one hydraulic cylinder which is on the one hand fixed stationary to the supporting base, preferably directly fixed to the supporting base, and which on the other hand engages with the cylinder chamber wall or an assembly part connected thereto.
Data Source
AI summary
The invention relates to a device (10; 50) for mechanically comminuting materials, including a vertically extending comminuting chamber (14) having an upwardly extending supply side (15) and a downwardly extending discharge side. The comminuting chamber is enclosed by an circular cylindrical and/or conical downwardly expanded comminuting chamber wall (12), and in which at least one rotor (16, 18) rotating about a vertical rotor axis (R) is arranged, which is provided with striking tools (38) that extend radially into the comminuting chamber, at least during operation. The rotors (16, 18) are held in a stationary manner with respect to a support base (20) of the device, and the comminuting chamber wall is supported on the support base. According to the invention, the comminuting chamber wall is held in place by way of a lifting device in the direction of the rotor axis (R) in a height adjustable manner relative to the support base (20). The lifting device (36) has a working position, in which the lower edge of the comminuting chamber wall (12) is arranged close to the support base (20) or to a part connected thereto, and a maintenance position, in which the lower edge (32) of the comminuting chamber wall (12) is vertically raised above at least one of the striking tools (22, 24). The invention allows easy maintenance and an uncomplicated exchange of the striking tools of the comminuting device.