Rotating seal

Abstract

The invention relates to a rotating seal which belongs to the field of sealing technology, in particular to a non-contact seal that is especially suitable for being used as the seal of two phase of gas-liquid or a revolving spindle with higher linear velocity. A whole ring-shaped seal is formed by connecting an upper semi-ring seal and a lower semi-ring seal; the semi-ring seals are respectively provided with a semi-ring base body which is provided with a cooling jacket, an end cover connecting plate and a semi-ring seal connecting plate used for connecting the two semi-ring seals; and the semi-ring base body is also provided with a cooling loop and a lipid supplementing hole. The invention has the advantages of greatly reducing the friction and abrasion of the sealing contact surface and avoiding the damage of shaft diameter; due to the distinctive valving structure of the rotating seal, the installation and maintenance are convenient, and the application scope and field can be enlarged; the rotating seal has good sealing performance, no leakage, strong pressure-proof capability and long service life, and can be used for sealing gas and liquid at the same time.

Description

technical field [0001] The invention relates to a rotary seal, which belongs to the technical field of sealing, is a non-contact seal, and is especially suitable for a seal with a relatively high linear velocity, a rotating shaft, and a vapor-liquid two-phase seal. Background technique [0002] In the prior art, the dynamic seals used for rotating shafts include contact seals, including packing seals, expanding ring seals, forming seals, mechanical seals, etc.; and non-contact seals, including labyrinth seals, centrifugal seals, Ferrofluid seals, etc. The shortcomings of these two types of seals are: in the contact seal, except for the mechanical seal, other types of seals have defects such as large friction loss, short life, inconvenient maintenance, worn shaft diameter, and can only be installed as a whole. The mechanical seal has a complex structure, requires high machining accuracy, occupies more space in the axial direction, and its life is generally only about one yea...

AI Technical Summary

Problems solved by technology

The shortcomings of these two types of seals are: in the contact seal, except for the mechanical seal, other types of seals have defects such as large friction loss, short life, inconvenient maintenance, worn shaft diameter, and can only be installed as a whole. The mechanical seal has a complex structure, requires high machining accuracy, occupies more space in the axial direction, and its life is generally only about one year; in the non-contact rotary seal, except for the magnetic fluid seal, other types of seals cannot To solve the problem of gas leakage, the magnetic fluid seal has certain limitations in pressure resistance. It is generally used for low pressure in the rotary shaft seal, not for high pressure; the heat resistance of magnetic fluid is poor, and when its temperature is higher than 90 degrees, it will not Stable state; at present, it is not possible to guarantee the long-term stable dynamic sealing of the rotary shaft for liquids, and it is only limited to sealing gas media

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