Hydraulic Crusher Release Valve for Faster Overload Response
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing crushers face issues with slow response times during overload situations, leading to potential damage due to inadequate rapid opening of the crushing gap, which can occur when non-breakable objects enter the crushing unit.
Innovation Solution
The overload triggering device incorporates a movable assembly with a hydraulic cylinder and an inertia element, where the inertia element is coupled to the piston or piston rod, allowing movement-controlled valve opening to quickly increase the crushing gap width, enhancing reaction time and preventing component damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressure valve is integrated into the hydraulic line to drain fluid from the pressure chamber during overload situations, then the crusher provides overload protection, but the response time is too slow and components may still be damaged
Solution Approach 1:
The valve is extracted from the hydraulic line and integrated directly into the movable assembly (piston or piston rod). This relocation allows the valve to respond immediately to overload forces acting on the crushing body, eliminating the time delay associated with fluid pressure transmission through the hydraulic line.
Solution Approach 2:
The valve acts as an intermediary between the overload force and the hydraulic fluid. When overload occurs, the valve directly opens to release fluid from the pressure chamber, mediating the transition from high-pressure support to rapid gap opening without requiring signal transmission or complex control systems.
2Loss of time
If the valve is formed between two relatively adjustable components of the movable assembly, then the valve opens rapidly in response to overload movement, but the device complexity increases
Solution Approach 1:
The valve function is merged with the existing movable assembly components (piston or piston rod). Rather than adding a separate valve mechanism, the valve is formed as an integral part of these components, utilizing their relative movement to achieve rapid opening while minimizing additional complexity.
Solution Approach 2:
The valve transitions from a static component to a dynamic one that automatically responds to the movement of the movable assembly. The relative adjustment between valve components is driven by the overload-induced motion itself, creating a self-actuating system that responds rapidly without external control.
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 ensures efficient protection against overload situations by rapidly opening the crushing gap, preventing damage to the crusher components and allowing non-breakable objects to exit, thereby maintaining operational integrity.
Implementation Method 1
The movable assembly is supported in the hydraulic cylinder against a fluid that is pressurized in a pressure chamber of the hydraulic cylinder
Implementation Method 2
the inertia element is coupled to the piston or the piston rod, allowing movement-controlled valve opening
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The invention relates to a crusher for mineral materials or recycled materials, in particular rotary impact crushers or jaw crushers, with a crushing unit (10) comprising a movable first crushing element (11), in particular a rotor or a crushing jaw, wherein a second crushing element (14), in particular an impact rocker or a crushing jaw, is associated with the first crushing element (11), wherein a crushing gap (15) is formed between the crushing elements (11, 14), wherein a movable assembly of an overload release device (30) is coupled to the first or the second crushing element (11, 14), wherein the movable assembly comprises a cylinder (25) of a hydraulic cylinder (20) or a piston (23) guided in the cylinder (20), wherein the movable assembly is designed to allow, in an evasive movement, a movement of the coupled crushing element (11, 14) that increases the width of the crushing gap (15).wherein a pressure chamber (24) is formed in the hydraulic cylinder (20), which is limited by the piston (23), and wherein the overload release device (30) has a valve (23.8) which, in its open position, creates a fluid-conducting connection between the pressure chamber (24) and a compensation area (28) and, in the closed valve position, blocks this connection. In order to achieve efficient protection of the crushing unit 10 against overload situations in such a crusher, it is provided that the valve (28.8) is formed between two components of the movable assembly that are adjustable relative to each other.