Prevent Jaw Crusher from Overload Damage

Prevent Jaw Crusher from Overload Damage

Shanghai, China (prHWY.com) May 29, 2012 - The jaw crusher has a feature of big crushing ratio, such as uniform finished product size, simple structure, big reduction ratio,reliable operation, easy maintenance, low operation cost compared with cone crusher. The highest anti-pressure strength of crushed material is 320MPa. It is widely used in mining, metallurgy, construction, highway, railroad, and chemistry industries and etc. Many models are available according to your different fineness requirements.

The working environment of jaw crusher is bad and the workload is volatile. The peak load is usually more than three times the average load. Often because of uneven or feed can not be broken due to extremely hard strong material (such as iron), etc. into the crushing chamber (hereinafter referred to as barrier material) and the sudden emergence of a substantial danger of overloading. Therefore, most jaw crusher do not have overload protection with targeted measures. In summary, until now, there are several commonly used overload methods.

(1) bracket to break law: the low intensity of the bracket is easy to set break points, which appeared in the crusher overload, stress sensitive area because of the bracket rose sharply to limit the stress on their own to break, cut off the power transmission, to prevent machine damage.

This traditional overload protection measures, simple structure, easy to manufacture. However, due to elbow plate (usually cast iron) the mechanical properties of volatile and subject to the limited accuracy of the calculation can not accurately quantify the control break points, the actual application is often overloaded and lack of protection. Moreover, even if the overload has been protected, but because of broken machines in the accident state, cleaning up, dismantling and replacement parts before the machine is not running, this process will inevitably cause disruption, delay production.hammer crusher:http://www.hx-china.com/2.html
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(2) flywheel moment limit protection: The spring friction clutch, hydraulic friction clutch or a safety pin and so on. Such methods in the simple pendulum jaw crusher to apply more. Torque friction clutch work: M = fN Where N is the disc springs and clamping force between the clutch; f for the springs and the clutch disc between the friction factor.

This clutch is necessary to ensure the transmission of torque to work, but also the transfer of torque does not exceed the allowable value. When the fall crushing chamber barrier material, the machine overload reaches a critical torque, the flywheel is free to slide in the axis of BU, the main components of the protective effect. However, due to the clutch friction factor / affected by external conditions (such as temperature, etc.) a greater impact to the reliability of the restrictions, and overload, still human clearance, stop repair, system recovery is too much trouble.

(3) hydraulic protection: As the aforementioned two kinds of methods exist for the protection overload protection under accident conditions is not reliable and need to stop treatment, resulting in disruption and recovery process more difficult issues, with more material in the crushing process flow barrier material (such as slag broken line), are often unable to meet production needs. Therefore, the development of safe and reliable hydraulic protection device to replace the traditional passive means of protection as possible to ensure a smooth continuous machine safety operation is particularly necessary.

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