Research on Overload Protection of Hydraulic System of Jaw Crusher

Project Background

Jaw crusher is a widely used crushing equipment. It is used to crush materials of different hardness and different properties in all walks of life

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Research on Overload Protection of Hydraulic System of Jaw Crusher

Jaw crusher is a widely used crushing equipment. It is used to crush materials of different hardness and different properties in all walks of life. Therefore, the jaw crusher will inevitably have an overload phenomenon during the operation. This requires the device itself to have a good self-protection system so that the device can operate safely and the failure rate is kept low.

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Common overload protection method of jaw crusher and its development The crushing operation condition of jaw crusher is extremely bad, the workload is highly volatile, and the peak load is usually more than three times the average load. Often due to uneven material or sudden breakage of the crushing chamber into extremely hard and strong unbreakable objects (such as iron blocks, hereinafter referred to as material barriers). To this end, the jaw crusher is equipped with targeted overload protection measures. Up to now, the following methods are commonly used.

(1) Folding method of the bracket: set the low-strength and easy-break point of the bracket, that is, when the crusher is overloaded, the stress sensitive area of ​​the bracket is broken by the stress to rise to the limit value, and the power transmission is cut off to prevent machine damage.

(2) This traditional overload protection measure has a simple structure and is easy to manufacture. However, due to the large fluctuation of mechanical properties of the bracket (generally cast iron) and limited by the calculation accuracy, it is impossible to accurately control the break point. In practical applications, it is often overloaded and cannot be protected. Moreover, even if the protection is obtained during overload, since the crusher is in an accident state, the machine cannot be operated before cleaning, disassembly and replacement, which will inevitably result in process interruption and delay in production.

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