Sealing ring structure and extruder applying sealing ring structure

Abstract

The invention relates to a sealing ring structure and an extruder applying the sealing ring structure. A sealing ring is provided with an axial center ring hole. The sealing ring is provided with a sealing side wall face arranged in the radial direction. The sealing side wall face is provided with at least one pair of fan-shaped shallow collecting pits. The axes of the shallow collecting pits arein an arc shape, and all the shallow collecting pits are arranged on the periphery of the center ring hole in the same deflection direction. The inner ends of the shallow collecting pits communicate with the center ring hole. The depths of the shallow collecting pits are gradually increased from exterior to interior. Accordingly, fluid dynamic pressure is generated through the shallow collecting pits in the sealing side wall face, materials collected in the shallow collecting pits are pushed in the direction of the center ring hole, raw material powder or fusion materials are prevented from diffusing and leaking towards the periphery, and radial sealing is achieved.

Description

technical field [0001] The invention relates to a sealing ring structure and an extruder using the sealing ring. Background technique [0002] With the rapid development of modern industry, the service environment of mechanical seals is undergoing profound changes, and the requirements for their working conditions are more stringent, and they are developing in the direction of high speed, high pressure, low temperature, and high vacuum. Taking an extruder as an example, the extruder is a kind of plastic machinery. Such as figure 1 As shown, the extruder includes a barrel 1 for storing materials, a rotor 2 for stirring the materials is arranged in the barrel 1, and a driving device 3 for driving the rotor 2 to rotate, so The output end 30 of the driving device 3 is connected to the shaft extension end 20 of the rotor 2 , and the output end 30 is rotatably arranged on the barrel 1 through the bearing 4 . The material to be processed is generally a raw material powder, which...

AI Technical Summary

Problems solved by technology

However, with the prolongation of the use time of the extruder, the sealing plane 501 of the rotating sealing ring 5 will be worn, and the elastic sealing ring 51 will also be aging, resulting in the rotor shaft end 20 and the rotating The gap between the sealing rings 5, and the gap between the rotary sealing ring 5 and the barrel 1 gradually increases

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