Security sealing device and application for pumps

Abstract

The invention relates to a security sealing device for pumps. The security sealing device is characterized by comprising a gland (2), a taper ring (4), a taper ring thrust spring (7), a taper sleeve (5) and a pressing plate (6). The taper ring (4) is installed in a groove (26) on the gland (2) and stressed by a spring (7). The taper sleeve (5) is fixedly installed on a shaft or shaft bushing (8). A conical surface (45) of the conical ring (4) is correspondingly matched with a conical surface (55) of the taper sleeve (5). An O-shaped sealing ring (65) is installed on the inner side of the pressing plate (6). A seal ring (58) is arranged between the inner annular surface of the taper sleeve (5) and the shaft or shaft bushing (8). The inner diameter ring surface (44) of the taper ring (4) is provided with a labyrinth seal groove (48). During use, the taper ring (4) functions as a labyrinth water seal. When a mechanical sealing device on a front pump shaft is damaged too much to fail in sealing and keeping pressure in a pump cavity, the taper ring is matched with the taper sleeve (5) to form rotational frictional sealing match of two conical surfaces under pressure. Therefore, pressure in the pump cavity is kept, medium in the pump cavity is prevented from leaking outside the pump, and safety protection is achieved.

Description

technical field [0001] The invention relates to a shaft sealing device, especially a shaft sealing device used in series with a mechanical sealing device. When the mechanical sealing device of the pump shaft encounters accidents such as damage and cannot seal and maintain the pressure in the pump chamber, the mechanical seal of the pump shaft When the device produces a large amount of leakage, the sealing device can play a sealing role for a period of time before the pump stops (like a mechanical seal device) and after the stop, maintain the pressure in the pump chamber, and prevent a large amount of medium in the pump chamber from leaking out of the pump , to achieve safety protection; and when the mechanical seal device of the pump shaft is working normally, it plays the role of water seal device. Background technique [0002] Existing technology as attached figure 1 As shown, a water seal device 3 is provided on the gland 2 at the rear of the mechanical seal device 1 of ...

AI Technical Summary

Problems solved by technology

[0003] Due to the limitation of its function and structure, the water seal device can only play the role of preventing leakage, but cannot achieve the function of sealing. Even if the sealing effect of the water seal is good, there will be a large amount of leakage, especially when the pressure is high. In the case of , the leakage is larger

[0004] When the mechanical sealing device of the pump shaft is damaged and other accident conditions cannot seal and maintain the pressure of the pump chamber, that is, when the mechanical sealing device of the pump shaft produces a large amount of leakage, the pressure on the water seal will increase greatly, and the water sealing device will not It can play a sealing role before and after the pump stops, maintain the pressure in the pump chamber, and cannot prevent a large amount of medium in the pump chamber from leaking out of the pump

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