Low-speed rotary sealing device

Abstract

The invention discloses a low-speed rotary sealing device which comprises a shell, a rotary shaft, a fixed shaft, an end cover, a rough sealing gasket and a main sealing ring. The rotary shaft and the fixed shaft are sleeved with the shell. The rotary shaft is sleeved with the end cover. The end cover presses one end face of a boss I arranged on the outer circle of the rotary shaft and is connected with one end face of the shell. A flange plate connected with the other end face of the shell is arranged on the outer circle of the fixed shaft. A boss II is arranged on the inner circle of the shell. One end face of the boss II is in sealing fit with the other end face of the boss I through the rough sealing gasket. The rotary shaft is sleeved with the main sealing ring which is pressed between the rotary shaft and the shell. Three seals are arranged according to use conditions. The rough sealing gasket is designed at the position, communicated with the outside world, of the device and mainly used for solving the problem that particles in the outside world enter the main sealing ring to cause damage; and auxiliary sealing rings are designed at the two ends of the main sealing ring and can effectively reduce the pressure produced after inner high-pressure liquid permeates out, so that the sealing effect of the main sealing ring is improved.

Description

technical field [0001] The invention relates to the field of mechanical rotary seals, in particular to a low-speed rotary seal device. Background technique [0002] The rotary sealing device is used in the internal spray system of mining machinery or the water system of the drilling rig. The common feature is that the rotating speed is low and the sealing device is required to be simple and reliable. It is easy to observe the leakage and replace the seal. The rotary seals currently used are generally designed with a sealing device, which does not consider the damage of different external media and solid particles to the seal, and the seal preload cannot be adjusted. Although the design parameters can meet the requirements, the service life is low and it is not easy to replace. Contents of the invention [0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a low-speed rotary sealing device that meets the requirements of design ...

AI Technical Summary

Problems solved by technology

The rotary seals currently used are generally designed with a sealing device, which does not consider the damage to the seal by different media and solid particles in the outside world, and the seal preload cannot be adjusted. Although the design parameters can meet the requirements, the service life is low and it is not easy to replace.

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