The main motor is equipped with a pulley to drive the pulley on the drum to drive the drum to rotate. The drum is supported on two main bearings. The drum is equipped with a propeller. The propeller is supported on a shaft concentric with the drum through the bearing and can be relative to the drum. Rotating, the big end of the drum is equipped with a differential, which is a planetary gear reduction mechanism. The input shaft at the right end of the differential is equipped with a pulley. The drum assembly of the horizontal centrifuge is installed in a stainless steel box making body. The box body is divided into two compartments. The left compartment collects the liquid phase excluded by the centrifuge and the right compartment collects the solid phase excluded by the centrifuge.
(1) Separation principle of centrifuge
The separation process of solid phase and liquid phase in mud is completed in drum. The principle of separation of the horizontal centrifuge machine is to use the high-speed rotation of the drum to drive the mud entering the drum to rotate at a high speed. The mud is thrown onto the wall of the drum to form a liquid ring. The solid particles in the liquid ring are affected by hundreds of times or even thousands of times greater than their own gravity. The centrifugal force overcomes the resistance of the mud viscosity and quickly settles on the inner wall of the drum to form a. The ratio of the centrifugal force to the gravity of the solid particles in the liquid sphere is called the separation factor of the centrifuge, which is an important parameter to measure the separation performance of the centrifuge.
(2) Principle of slag pushing of centrifuges
The slag pushing work of the horizontal centrifuge is completed by the screw thruster. Under the action of the differential, the screw thruster and the drum form a certain speed difference, so the solid particles that have settled on the inner wall of the drum are scraped off the wall of the drum, gradually pushed to the small end of the drum by the screw blades, and dehydrated during the advancing process, and finally reached the sand discharge nozzle and was thrown out of the drum.
(3) The working principle of the differential
The differential is actually a two-stage planetary gear reducer. Its shell is machined with internal teeth. The shell rotates with the drum. The pulley at the left end drives the first-stage sun gear on the input shaft to rotate, the transmission principle of the second stage is the same as that of the first stage, and finally the propeller is driven to rotate through the output shaft.
(4) The working principle of the differential safety device
In order to protect the differential from damage when the horizontal centrifuge is overloaded, a safety device is provided at the left end of the differential, and a safety pin is installed on the gear shaft. The power transmitted from the pulley is transmitted to the clutch through the jaw. The dial is then transmitted to the cam, which transmits power to the gear shaft through the safety pin. When the torque exceeds the strength of the safety pin, the safety pin will be cut, thereby disconnecting the transmission and playing a safety protection role. Note: As the overload protection of the frequency converter is relatively reliable, there is no limit switch installed on the frequency conversion high-speed centrifuge.