Backflow type main shaft sealing device

Abstract

The invention relates to a backflow type main shaft sealing device which comprises a paddle bearing sleeve sleeved at the outer part of a main shaft, wherein the outer part of the paddle bearing sleeve is sleeved with a sealing sleeve; the upper end of the sealing sleeve is connected with a material barrel of a mixing machine; a plurality of oil seals are sleeved at the outer part of the sealing sleeve; an oil seal seat is sleeved at the outer part of each oil seal; an oil seal pressing plate is arranged at the upper end of the oil seal seat; a ring part is arranged at the inner side of the lower end of the oil seal seat; the diameter of an inner hole of the ring part is the same as that of the main shaft; the lower end of the ring part is hermetically connected on a projecting part at the bottom of the main shaft; and the lower end of the paddle bearing sleeve is hermetically connected to the upper end of the ring part. The backflow type main shaft sealing device is suitable for the sealing of the main shaft in the high-speed mixing machine, and the sealing effect is better.

Description

technical field [0001] The invention relates to a main shaft sealing device in a high-speed mixer. Background technique [0002] The main shaft sealing device in the high-speed mixer currently used has a structure such as figure 2 As shown, it includes a blade support sleeve 2 sleeved outside the main shaft 1, the bottom end of the blade support sleeve 2 rests on the protrusion 11 at the bottom of the main shaft 1, and an oil seal seat 3 is sleeved on the outside of the blade support sleeve 2 The outer side of the upper end of the oil seal seat 3 is provided with an annular boss 31, the annular boss 31 is connected with the barrel 4 of the mixer, and the inner side of the lower end of the oil seal seat 3 is provided with a ring part 32, the diameter of the inner hole of the ring part 32 is not Smaller than the outer diameter of the blade support sleeve 2, there is an annular gap between the oil seal seat 3 and the blade support sleeve 2, and a polytetrafluoroethylene sealin...

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of the above-mentioned main shaft sealing device is: after long-term use, the polytetrafluoro sealing ring 5 and the oil seal 6 will be worn, so that there is a gap between the polytetrafluoro sealing ring 5 and the oil seal and the blade support sleeve 2, at this time The material in the barrel 4 of the mixer will flow into this gap and flow down to the outside of the mixer smoothly, and the sealing effect of the main shaft is poor

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