Seals for rotating machinery

A sealing device and rotating machinery technology, applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve the problems of difficult processing and assembly process, seal failure, high matching accuracy, etc., to reduce the difficulty of processing and assembly, To prevent damage to the prime mover, to adjust the effect of flexible and convenient

CN109424747BActive Publication Date: 2020-06-26CRRC SMD (SHANGHAI) LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-06-26

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Abstract

The invention relates to a sealing device for a rotary machine. The rotary machine comprises a machine body and a rotating shaft. The sealing device comprises a fixed portion and a rotating portion, wherein the fixed portion comprises an end cover fixed to the machine body, and a fixed ring assembled on the end cover; the rotating portion comprises a moving ring which is mounted on the rotating shaft and can rotate along with the rotating shaft; the moving ring and the fixed ring are matched to form a rotary sealing pair; the fixed ring and the end cover are connected through a stop pin; and the shear breaking strength of the stop pin is greater than rated driving force of the rotary machine but lower than maximum allowable driving force of the rotary machine.
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Description

technical field

[0001] The invention relates to a sealing device, in particular to a sealing device for a rotary machine. Background technique

[0002] The mechanical seal is a shaft seal device of a rotating machine. It mainly relies on the preloading of the elastic element on the dynamic and static ring end face seal pairs and the compression of the medium pressure and the pressure of the elastic element to achieve sealing, thereby preventing the fluid medium in the equipment from passing through the shaft. Circumferential clearance leakage between equipment and equipment. There are many types of shaft seals, but because mechanical seals have the advantages of less leakage and long life, mechanical seals are widely used in the sealing of rotating shafts.

[0003] However, there are still some problems in the application process of the mechanical seal device in the prior art. For example, general mechanical seals have no protective measures. During the working process, th...

Examples

Embodiment Construction

[0027] The present invention is introduced below by accompanying drawing.

[0028] figure 1 is a structural schematic diagram of a sealing device 100 for a rotary machine according to the present invention. like figure 1 As shown, this rotary machine includes a body 7 and a rotating shaft 1, wherein the body 7 is a fixed part, and the rotating shaft 1 is a rotatable part. The sealing device 100 of the present invention for such a rotating machine includes a stationary part and a rotating part. Wherein, the stationary part includes an end cover 2 fixed on the machine body 7 and a static ring 8 assembled on the end cover 2 . The stationary ring 8 and the end cap 2 are connected by a stop pin 4, which will be described in detail below. The rotating part includes a moving ring 9 which is installed on the rotating shaft 1 and can rotate with the rotating shaft 1. The moving ring 9 and the static ring 8 cooperate with each other to form a rotating sealing pair.

[0029] figur...