Improvement of piston push centrifuge and rotary drum combination way

Abstract

The invention relates to a piston push centrifuge, in particular to improvement of single-stage piston push centrifuge and rotary drum combination way. The right end of a wheel disc is connected with a cylinder body of the rotary drum by using a screw, the left end of the wheel disc is connected with a hollow main shaft, a push disc is connected at the right end part of a push shaft, the push shaft penetrates the wheel disc and is arranged in an inner hole of the main shaft through a sliding bearing, and a plurality of adjustable push pieces are mounted on the outer circumference of the rightend surface of the push disc. The inner diameter on the left side of the cylinder body of the rotary drum is in interference fit with the outer diameter of a boss of the wheel disc; and the maximum deformation of the rotary drum is reduced from being larger than or equivalent to 0.5mm to being below 0.20mm after changing the inner diameter on the left side of the cylinder body of the rotary drum to be in interference fit with the outer diameter of the boss of the wheel disc, thereby not only improving the dehydration rate of the centrifuge by 1% to 2%, but also leading the operation to be more stable.

Description

technical field [0001] The invention relates to a piston pusher type centrifuge, in particular to the improvement of the drum combination mode of a single-stage piston pusher type centrifuge. Background technique [0002] The piston pusher centrifuge is a filter centrifuge. As the name suggests, the piston pusher centrifuge uses a piston-like mechanism in the drum to push the filter cake trapped on the drum screen gradually out of the drum. To realize the unloading of the centrifuge, this piston-like mechanism can be a pusher disc (such as a single-stage piston pusher centrifuge) or a front-stage drum (multi-stage pusher centrifuge). The minimum water content of the filter cake removed from the drum is the basic requirement for centrifuge separation; the formation of a filter cake layer with uniform thickness and smooth surface in the drum is the prerequisite for the normal operation of the centrifuge. In order to facilitate processing and maintenance, the drum of the pisto...

AI Technical Summary

Problems solved by technology

At present, the cooperation relationship between the bowl and the disc of the piston pusher centrifuge is clearance fit. When the centrifuge is running, the huge centrifugal force generated by the filter cake in the bowl and the mass of the bowl itself is driven by the bowl. As a thin-walled cylinder, the drum body is inevitably deformed, and the deformation is irregular. The maximum deformation can be greater than or equal to 0.5mm, and the minimum part even blocks the push plate. In order to make the push plate push normally Only by reducing the diameter of the push piece, the total gap between the wheel disc and the screen will increase, so it is difficult for the push disc to push the filter cake on the screen, and the remaining filter cake layer will be squeezed by the push disc. If the filter cake is too dense, it will even block the gap between the screens, resulting in insufficient dehydration of the new filter cake, and a sharp increase in water content; on the other hand, the formed filter cake layer is uneven, the surface is not smooth, and the drum is deformed, and the drum does not run smoothly. Balance will inevitably increase the vibration of the centrifuge

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