Crusher

DOUBLE ROLL CRUSHER

DOUBLE ROLL CRUSHER

1. 2. 3. 4. 5. 6. 7. 8. 9.

The base The base Lifting plate Feed inlet Shaft coupling Gearbox Roller Hydraulic coupler The motor

1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13.

Frame Protects pring Cover Feed inlet Pulley Lifting plate Bearing seal Tooth roll Wheel hub Shaft The motor Adjusting screw The base

TEETH OF DOUBLE ROLL CRUSHER

Mechanical Operations, 1E

http://www.gundlachcrushers.com/crushers/crusher-roll-design.cfm

MATERIAL OF TEETH Metal used for the teeth (high wear rates ): •

manganese steel or a boron alloyed carbon steel

ACCESSORIES

Hydraulic gap adjustment for remote operation

pulley

Single drive units transfer power to the opposing roll via an interstage belt drive

Guard

Dust seal

Crushing Ring

DOUBLE ROLL CRUSHER + HOPPER

SCOPE OF SUPPLY •

Crushing Rolls  –

•

Creeper

Constructional Features:  –  –  –  –  –  –  –  –  –  –  –  –  –

Base frame Hopper Rotor Spring Top cover Feed inlet Lifting plate Housing Crushing Ring Dust seals Toggle Flexible Mounting

• • •

•

•

Bearings Adjustments Lubrication —Grease nipple — Grease pump Accessories: — Pulley —V-belts — V-belt guard Local panel

NOISE POLLUTION STANDARD •

The primary and secondary crusher, apron feeder and vibrating screen emitted noise ranging from 90 to 99 dB

•

The noise level recorded at various operator’s cabin are within

acceptable limits and the general noise level outside te crushing plant drops to 86 dB

Source: Mine Environment and Management: An Indian Scenario

Coefficient friction between belt and pulley Belt type

Bare pulley

Lagged pulley

For dry, clean rubber belts

0.25

0.35

For dusty environment

0.2

0.27

For wet work

0.2

0.2

Source: Mechanical Engineering Reference Manual for the PE Exam, Michael R. Lindeburg

http://conveyorbeltguide.com/Engineering.html

# Ideally , the coefficient of friction between a rubbercoated pulley and a rubber belt is approximately 0.55

Crusher-sticky material •

•

Shalemaster Crusher specifically designed to process wet, sticky feeds such as soft shale, kaolin and clay.

The direct drive provides differential roll speeds and combines with the special claw tooth roll design (against plugging and other difficulties when dealing with sticky materials.)

Crusher-sticky material Wipers •

Installed between thecrusher teeth to scrape the sticking material