Mandrel structure of spiral pusher of horizontal decanter centrifuge

Abstract

The invention discloses a mandrel structure of a spiral pusher of a horizontal decanter centrifuge. The mandrel structure is composed of a cylindrical spiral body, a conical spiral body and a partition plate, the spiral pusher is divided into a large end and a small end according to the size of the outer diameter of the spiral pusher, a feeding pipe enters a material distribution bin from the small end of the spiral pusher, the material distribution bin is an inner cavity formed by the conical spiral body, the cylindrical spiral body and the partition plate of the spiral pusher, the conical spiral body, the cylindrical spiral body and the partition plate are sequentially connected in the feeding direction of materials, the partition plate is arranged in the circumferential direction of theinner wall of the cylindrical spiral body, the partition plate is provided with a protrusion capable of rebounding materials and preventing the materials from reversely flowing into the conical spiral body in direction facing the feeding pipe, a first outlet which communicates with the material distribution bin is formed in circumference of the cylindrical spiral body, and the large end of conical spiral body adopts a conical surface structure. According to the mandrel structure of the spiral pusher of the horizontal decanter centrifuge, the rigidity of a spiral mandrel is improved, the reverse flow of the materials is reduced, a small amount of the reverse flow materials can be discharged in time, the operation load and the vibration intensity of the centrifuge are reduced, and the service life of the centrifuge is prolonged.

Description

technical field [0001] The invention relates to a mandrel structure of a screw pusher of a horizontal screw machine, specifically a novel mandrel structure, belonging to the technical field of engineering machinery. Background technique [0002] Decanter centrifuge is a horizontal spiral unloading, continuous operation settling equipment. Its working principle is that the drum and the screw feeder rotate at a high speed in the same direction with a certain difference in speed. The material is continuously introduced into the distribution bin of the screw feeder from the feed pipe, and enters the drum after being accelerated. Under the action of centrifugal force, the heavier The solid matter deposits on the drum wall to form a sediment layer, and the screw pusher continuously pushes the deposited solid phase matter to the cone end of the drum, and pushes it out of the machine through the slag outlet. Among them, the feeding method adopts the small end of the screw pusher to...

AI Technical Summary

Problems solved by technology

Among them, the feeding method adopts the small end of the screw pusher to feed. This method can reduce the length of the feeding pipe and avoid the breakage of the feeding pipe, but it will cause part of the material to flow back into the outer side of the distributor and the spindle of the screw pusher. A large amount of material accumulates in the space between them, which causes the seal failure of the small end bearing of the screw propeller and causes the bearing to be damaged after entering the material; at the same time, the accumulated large amount of material will cause the screw propeller to generate eccentric force, increasing the operating load and vibration of the centrifuge Intensity, affecting the service life of equipment

Images