Jaw Crusher Variable Eccentric Mechanism for Load Start-Up
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Solution Overview
Problem
Conventional operating mechanisms for material processing devices, such as jaw crushers, suffer from inflexibility, inefficiency, and high power consumption due to fixed stroke movement, which limits crushing capabilities and increases energy consumption, especially during start-up and run-down phases, and are unsuitable for handling load conditions like jamming.
Innovation Solution
An adjustable operating mechanism with a shaft that includes a coupling portion with variable eccentricity, allowing the central axis to be configured relative to the shaft axis, enabling oscillatory movement adjustment through concentric or eccentric rotation, thereby optimizing the crushing action and reducing power requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional operating mechanisms with fixed stroke are used, then the structure is simple, but the adaptability and crushing flexibility are limited
Solution Approach 1:
The patent applies the dynamics principle by making the eccentricity of the coupling portion adjustable rather than fixed. The coupling portion can be repositioned along the shaft to change the stroke length and oscillation characteristics of the movable jaw, allowing the mechanism to adapt to different crushing requirements while maintaining a relatively simple overall structure.
Solution Approach 2:
The patent implements parameter changes by allowing variation in the eccentricity parameter of the coupling portion. By changing the position of the coupling portion relative to the shaft axis, the operational parameters such as stroke length, oscillation amplitude, and speed characteristics can be adjusted to optimize crushing performance for different materials and conditions.
2Reliability
If powerful components are used to handle loads, then the reliability and load handling capability are improved, but the power consumption and system expense increase
Solution Approach 1:
The patent applies dynamics by enabling the operating mechanism to operate in different modes - eccentric mode for normal crushing operations and concentric mode for start-up and load handling. This dynamic switching allows the system to use powerful components only when necessary while reducing power consumption during start-up and run-down phases by operating in concentric configuration.
Solution Approach 2:
The patent implements periodic action by alternating between eccentric and concentric operation modes. During normal operation, the mechanism operates in eccentric mode to perform crushing; during start-up, run-down, or load conditions, it switches to concentric mode to reduce power consumption and stress on components, creating a periodic cycle of high and low power states.
3Use of energy by moving object
If the shaft operates in concentric configuration, then the power consumption is reduced, but the oscillatory movement and crushing action are eliminated
Solution Approach 1:
The patent implements periodic action by alternating between concentric and eccentric operation modes. During start-up and run-down phases, the mechanism operates in concentric mode to minimize power consumption. During normal crushing operations, it switches to eccentric mode to generate the necessary oscillatory movement and crushing action, creating a periodic cycle that optimizes both energy efficiency and productivity.
Solution Approach 2:
The patent applies dynamics by enabling smooth transition between concentric and eccentric configurations of the coupling portion. This dynamic adjustment allows the system to switch between low-power concentric operation (for start-up and idle phases) and high-productivity eccentric operation (for crushing phases), optimizing the balance between power consumption and crushing action based on operational requirements.
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
The mechanism allows for flexible operation by adjusting the eccentricity of the movable jaw, reducing power consumption, improving efficiency, and enabling start-up under load conditions, thus enhancing the crusher's performance and reducing downtime.
Implementation Method 1
the coupling portion is configurable such that, in response to rotation of the shaft about the shaft axis, the coupling portion rotates eccentrically about the shaft axis
Implementation Method 2
the coupling portion is configurable such that, in response to rotation of the shaft about the shaft axis, the coupling portion rotates concentrically, or substantially concentrically, with the shaft
Data Source
AI summary
A jaw crusher has an operating mechanism comprising a rotatable shaft coupled to a movable jaw in order to translate rotation of the shaft into oscillatory movement of the jaw. The shaft comprises a coupling portion by which the shaft is coupled to the movable part, wherein, in at least one configuration, a central axis of the coupling portion is parallel with the shaft axis and the coupling portion is eccentric with respect to the shaft axis. The coupling portion is configurable to adjust the location of the central axis with respect to the shaft axis in order to adjust the eccentricity of the coupling portion with respect to the shaft axis, thereby correspondingly adjusting the oscillatory movement imparted to the movable jaw.