What is the working principle of jaw crusher?
The working principle of jaw crushers is based on the reciprocating movement of the movable jaw that compresses and crushes the rock or ore between itself and the fixed jaw, as the material enters the zone between the jaws.
Which force is used in jaw crusher?
A jaw crusher uses compressive force for breaking of particle. This mechanical pressure is achieved by the two jaws of the crusher of which one is fixed while the other reciprocates.
How do you calculate jaw crusher capacity?
The numerator is calculating the volume of one swing of a jaw, times the density of material in the chamber, times the number of cycles per minute. This should give you the mass of material crushed per minute….
- Pp = 2800 (2.8 SG)
- e = 0.2 (halfway between dolomite and sandstone)
- A = 250/1000 x 500/1000.
- Wj = 0.5.
- Nj = 225.
Which motor is used for jaw crusher?
The jaw crusher requires a high starting torque for its operation. Belted slip ring induction motors and Double cage induction motors (with direct online starter) are employed because of their high starting torque.
How many types of jaw crushers are there?
There are two basic types of jaw crushers: single toggle and double toggle. In the single toggle jaw crusher, an eccentric shaft is on the top of the crusher. Shaft rotation causes, along with the toggle plate, a compressive action. A double toggle crusher has two shafts and two toggle plates.
What is Pitman in jaw crusher?
The pitman usually denotes a connecting rod, but in a jaw crusher it does not connect two things. Here, it refers to the moving jaw in a jaw crusher. It achieves the reciprocating movement through the eccentric motion of the flywheel shaft. This creates enormous force in each stroke.
What is the efficiency of jaw crusher?
Abstract. It is well known and taken for granted that the efficiency of energy use by comminution (i.e. breaking, crushing, grinding) equipment is very low, typically less than 10%.
What is feed size in jaw crusher?
Feed sizes range from 40 mm to 350 mm, depending on the model. The main fields of application of jaw crushers are construction materials, mineralogy and metallurgy, ceramics and glass, materials research and environmental analysis.
What is gape and set of jaw crusher?
These are commonly used as primary crushers in the mineral industry. The size of the feed opening is referred to as the gape. The opening at the discharge end of the jaws is referred to as the set.
What are the parts of jaw crusher?
Although the jaws do the work, the real heart of the jaw crusher and its components are the toggle plates, the pitman, and the ply wheel. These are the parts and components that generate the crushing action and provide the energy needed to break the ore.
What is crusher reduction ratio?
The purpose of the primary crusher is to reduce the ROM ore to a size amenable for feeding the secondary crusher or the SAG mill grinding circuit. The ratio of reduction through a primary crusher can be up to about 8:1.
What is flywheel in jaw crusher?
The purpose of the flywheel is to generate energy in the form of motion. Once the motor has the flywheel turning the momentum of the wheel will carry it through a crushing cycle. The motor then will only have to provide the energy necessary to propel the fly wheel.
How do you adjust a jaw crusher?
JAW ADJUSTMENT The hex nut on the side of the frame adjusts the movable jaw gap. To INCREASE the particle size adjust the large hex nut on lower frame counter- clockwise to desired size. Re-tighten spring rods no more than hand tight.
What is gape in jaw crusher?
Gape: The distance between the jaws at the feed opening. Closed side set (CSS): The minimum opening between the jaws during the crushing cycle (minimum discharge aperture)
How do I adjust my jaw crusher gap?
Two spring rods located on the back of the crusher control tension of the toggle. The hex nut on the side of the frame adjusts the movable jaw gap. To INCREASE the particle size adjust the large hex nut on lower frame counter- clockwise to desired size. Re-tighten spring rods no more than hand tight.
What is the product size of jaw crusher?
The jaw crushers are available in 8 different sizes: BB 50, BB 100, BB 200, BB 300 and the bigger models BB 250, BB 400, BB 500 and BB 600.
What is the working principle of a jaw crusher?
The working principle of the jaw crushers is very simple. Powered by a diesel or gas motor, the jaw crusher brakes materials in a crushing chamber. The materials are pushed inside the chamber from the top opening and when crushed they are released through the bottom opening. The crushing power of the jaw crushers depends on the size of the chamber.
Why do I need to adjust the setting adjustment on my Crusher?
To compensate for wear on toggle plate, toggle seat, pitman toggle seat, and jaws additional shims must be inserted to maintain the same crusher opening. The setting adjustment system is designed to compensate for jaw plate wear and to change the CSS (closed side setting) of the jaw crusher.
What is the horizontal component of motion of a crusher?
The horizontal component of motion (throw) at the discharge point of the single-toggle jaw crusher is greater than the throw of the Dodge crusher at that point; in fact, it is about three-fourths that of Blake machines of similar short-side receiving-opening dimensions.
What is the jaw crusher discharge opening?
The jaw crusher discharge opening is the distance from the valley between corrugations on one jaw to the top of the mating corrugation on the other jaw. The crusher discharge opening governs the size of finished material produced by the crusher.