jaw crushers reduce large-sized rocks, ore, or other material by a compression action. A fixed jaw, mounted in a V-shaped alignment, is the stationary breaking surface, while a movable, “swing” jaw exerts a force on the feed material by pushing it against the stationary plate.
A big piece of machinery called a jaw crusher is used to smash rocks in ore processing facilities and mines. The reduction of big materials is a common use for jaw crushers in the mining and recycling sectors as well as in pit and quarry operations.
Using compressive force, jaw crushers reduce heavy materials into smaller,
easier-to-handle fragments. It features two crushing jaws, one of which is
stationary and the other is moving, both of which provide mechanical pressure to
crush the materials. The materials are dumped into the crushing chamber, which
is formed by the two vertical crushing jaws and resembles a V. It gets its name
from how broad the entrance initially is before narrowing and becoming a V to
receive the crushed materials.
The top entrance of the crushing chamber serves as a gauge for a jaw crusher's size. For instance, a 48" x 42" jaw crusher has two crushers that are 42" apart in width and 48" apart from one another. The primary applications for using jaw crushers are:
As opposed to double-toggle jaw crushers, which use a pendulum motion to crush
hard materials, single-toggle jaw crushers function using a movable crusher that
moves in an elliptical pattern. The eccentric shaft produces the crushing force,
which is subsequently transmitted to the crushing zone through a toggle plate
mechanism. Heavy loads are balanced by the centrifugal weights on the eccentric
shaft, which are connected to the system via spring pulling rods that create a
non-positive connection throughout.
The feed material may be greatly decreased when it enters the crushing chamber due to the angle of depth between the two crushers. The final size grain distribution of the crushed materials will be determined by the changeable crusher settings and the compatibility of the selected tooth shape for the crushing plates. Multiple settings may be changed for the crusher thanks to an adjustable wedge mechanism. The adjusting system's components are all accessible and require little to no maintenance. If it totally wears out, the pieces can also be changed.
Jaw crushers come in different shapes and sizes to fit different crushing needs. Some of the most common types of jaw crushers used today are:
Single-toggle jaw crushers
The eccentric shaft of single-toggle jaw crushers, commonly referred to as
overhead eccentric crushers, is located above the machine. Here, the eccentric
is included into the swing jaw plate, which oscillates up and down as the
flywheel is turned. A single-toggle jaw crusher's swing plate pivots at the
bottom, which moves the jaw in an arc-like motion. When the material is
compressed against the stationary plate by the moving crusher, it is crushed.
These pieces of equipment are available in both heavy-duty and lightweight designs that use stainless steel housings. High-grade forged steel serves as the material for the eccentric shaft, while cast steel or welded versions of the moving jaw are available. A compression spring holds the toggle in place on these crushers. Shims can be used to make minor gap changes since they are firmly installed into the toggle block and mainframe. Comparatively speaking, single-toggle jaw crushers have fewer shafts and bearings than double-toggle jaw crushers. There is only one toggle that connects the fixed point at the fixed jaw's bottom to the swinging jaw.
Double-toggle jaw crushers
In a double-toggle jaw crusher, the eccentric shaft that moves the front and rear
toggles up and down also drives the moving crusher jaw. The movable crusher jaw
closes during the downstroke and opens during the upstroke of each shaft
rotation. A tension rod that is loaded with springs holds the toggle in place.
Due to the fact that there is no shock loading passed to the bearings and shaft
when the material is crushed, the eccentric is located directly behind the
swinging jaw, preventing damage to the eccentric.
The crusher jaw is pushed open and drawn closed at the bottom in a manner similar to a swinging door that is hinged above it. One toggle plate is situated on the bottom of the eccentric arm and the swinging jaw, while the other toggle plate is found on the side of the eccentric arm directly across from it. The eccentric arm travels to a fixed location at the rear of the jaw crusher's frame.
In principle, a double-toggle jaw crusher functions by crushing tough materials between two enormous jaw plates instead of using rotational motion like a single-toggle jaw crusher. The difference in the eccentric's location between the two is another defining characteristic. The eccentric on a single-toggle jaw crusher is placed at the top, but the eccentric on a double-toggle jaw crusher is found behind the swinging jaw.
PICS INTERNATIONAL Jaw Crushers are created for a variety of uses, from harsh use in heavy mining to heavy duty crushing requirements. The jaw crushers from PICS INTERNATIONAL boost productivity and provide the best throughput while lowering operational expenses.