Working principle of centrifuge:
The separation process of solid and liquid phases in mud is completed in a drum. The separation principle of a centrifuge is to use the high-speed rotation of the drum to drive the mud entering the drum to rotate at high speed. The mud is thrown onto the wall of the drum to form a liquid circle. The solid particles in the liquid circle, due to the centrifugal force hundreds or even thousands of times greater than their own gravity, overcome the resistance of mud viscosity and quickly settle onto the inner wall of the drum, forming a solid layer, and the liquid forms a liquid phase layer. The ratio of the centrifugal force exerted on the solid particles in the liquid circle to their own gravity is called the separation factor of a centrifuge, and it is an important parameter to measure the separation performance of a centrifuge.
| Item |
Description |
Item |
Description |
| Model |
LW450-1000N |
Control mode |
Power frequency control |
| Bowl Diameter |
450mm |
Bowl Length |
1000mm |
| Bowl material |
304 high-quality stainless steel |
Max. Bowl Speed |
Max. no-load speed 1800rpm |
| Typical Bowl Speed |
1800rpm |
Vibration severity |
no load≤7.1mm/s,load≤11.2mm/s |
| Dynamic balance accuracy grade |
Not lower than grade G6.3 |
Differential oil temperature rise |
no load≤30ºC/h,load≤40ºC/h |
| Bearing temperature rise |
no load≤30ºC/h, load≤40ºC/h |
Processing Capacity |
60m3/h |
| Main Drive Motor: |
30Kw |
Auxiliary motor |
7.5KW |
| Feed Pump Motor |
5.5KW |
Voltage |
380V,50Hz |
| Dimensions (L*W*H) (mm) |
2470*1590*1515 |
Weight (kg) |
2100Kg |
The principle of pushing slag in a centrifuge:
The slag pushing work of the centrifuge is completed by a screw propeller. Under the action of the differential, a certain speed difference is formed between the screw propeller and the drum. Therefore, the solid particles that have settled on the inner wall of the drum are scraped off the drum wall, gradually pushed towards the small end of the drum by the screw blades, and dehydrated during the propulsion process. Finally, they reach the sand discharge nozzle and are thrown out of the drum.
Troubleshooting:
1. The centrifuge vibrates heavily due to the following reasons:
The surface of the can is too soft, causing resonance;
First start after prolonged shutdown;
The solid phase in the drum was not cleaned thoroughly after the last work;
Incorrect installation of the inlet pipe, causing friction between the inlet pipe and the drum or fracture of the inlet pipe;
When moving, the liquid inlet pipe is bent due to collision or other reasons;
The upper box cover is not properly covered, causing friction between the drum and the box;
Friction between the sand outlet sheath and the box body;
The position of the half month disk after maintenance is incorrect;
2. No solid discharge from the sand discharge port:
The centrifuge operates at an overload, causing the mechanical safety device to fall off or the safety pin to shear, resulting in no rotation difference between the thruster and the drum;
Wrong power connection, incorrect motor rotation;
Auxiliary belt slipping;
Insufficient or no liquid supply;
3. Mud returns from the small end of the drum:
Excessive liquid intake;
The outlet of the inlet pipe is blocked by debris;
The drum and propeller are locked;
4. The drum and propeller are locked:
Solution: Pour clean water into the drum, soften the mud cake on the inner wall of the drum, remove the auxiliary machine cover, and manually rotate the belt pulley so that it can rotate more than half a turn. (If the disc does not move, remove the half moon disc, and remove the sediment between the propeller blades and the half moon disc. However, be sure to replace the half moon disc in its original position and not change its position randomly to avoid causing imbalance of the drum). Open the auxiliary machine junction box, invert the power supply of the auxiliary machine, start the auxiliary machine, continuously add clean water to the drum, and gradually brake the drum with a wooden stick. (Note: Do not insert a stick into the sand discharge nozzle to brake the drum, as this will inevitably break the sand discharge nozzle and cause serious consequences!) At this time, the sediment in the drum will gradually be discharged from the sand discharge nozzle. After the mud and sand are discharged, connect the auxiliary machine back to the normal phase sequence, fasten the cover and box, start the centrifuge, check if the rotation direction is correct, and then inject clean water to rinse for 10 minutes.
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