Double Toggle Jaw Crusher Working Principle: A Comprehensive Guide

In the mining and construction industries, crushing equipment plays a pivotal role in reducing the size of rocks and other materials for further processing. Among the various types of crushers available, the double toggle jaw crusher stands out for its robustness and efficiency. In this article, we'll explore the working principle of the double toggle jaw crusher, highlighting its advantages and applications.

What is a Double Toggle Jaw Crusher?

A double toggle jaw crusher is a type of jaw crusher that uses two toggle plates, one set on either side of the crusher and connected via a pivoting mechanism to generate a powerful compressive force.

How Does a Double Toggle Jaw Crusher Work?

1. Structure and Components:

• Jaw Plates: The primary components involved in the crushing process, usually made of manganese to withstand the wear and tear.
• Toggle Plates: Two plates, one fixed and one moving, help create the necessary motion for crushing.
• Swing Jaw: The moving component that applies force on the material by compressing it against the fixed jaw plate.
• Pitman: The part that moves by oscillating motion and drives the movement of the swing jaw.

2. Working Mechanism:

The double toggle jaw crusher operates by using mechanical pressure to break down materials:

1. Material Insertion: The material to be crushed is fed into the chamber.

2. Crushing Action: As the motor drives the eccentric shaft, the pitman—coupled with the two toggle plates—induces motion. The pitman's movement translates through the toggle plates to push the swing jaw against the fixed jaw and apply pressure to the material.

3. Engagement: Each revolution of the shaft involves a sequence of movements that result in the downward and backward motion of the swing jaw, thus crushing and expelling it through the bottom opening.

4. Expansion and Release: This compressive action is followed by a release as the swing jaw moves away from the fixed jaw, letting the crushed material fall through due to gravity.

3. Crushing Cycle:

The process involves repeated cycles of crushing and releasing. Each cycle allows the machine to crush materials of varying sizes progressively, leading to more uniform output.

Advantages of the Double Toggle Jaw Crusher

1. High Efficiency and Durability:

The design of the double toggle system offers improved energy efficiency, as it generates a lower power draw compared to other types due to less friction.

2. Robust Construction:

The design is inherently robust, which makes it more suitable for crushing hard and abrasive materials.

3. Reduced Wear and Tear:

The mechanical advantage offered by the two-toggle system results in less stress on the components, particularly on the wear plates, enhancing the crusher's longevity.

4. Adjustable Output:

The output size can be adjusted by modifying the toggle plate and the build of the jaw opening, making it versatile for different crushing needs.

Applications of the Double Toggle Jaw Crusher

This type of jaw crusher is widely applied in mining, quarrying, and recycling operations where rigorous materials like slag, stones, and ores are processed. You will often spot these robust machines in:

• Heavy-duty mining projects: Where extraction involves hard materials.
• Aggregate production: Processing larger aggregates into smaller, useable materials for construction.
• Recycling plants: Crushing reprocessed construction and demolition waste.

Understanding the working principle of the double toggle jaw crusher is crucial for selecting the right equipment for specific applications. Its efficiency, durability, and adaptability make it a preferred choice in various industries. Whether in mining or recycling, the double toggle jaw crusher continues to play an essential role, providing optimal performance and reliability.

As always, consider not just the technical specifications but also the operational requirements and maintenance provisions when selecting a crusher for your needs. A well-maintained double toggle jaw crusher can significantly enhance productivity while minimizing downtime and operational costs.