A sealing device for gas-liquid two-phase fluid medium under variable working conditions

A fluid medium and sealing device technology, which is applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve the problems of weak adaptability, poor sealing stability of gas-liquid two-phase fluid medium, etc., and achieve good throttling and pressure reduction, The effect of good sealing effect

Active Publication Date: 2021-07-20
CHANGSHU INSTITUTE OF TECHNOLOGY
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to solve the problem of poor sealing stability and weak adaptability of the gas-liquid two-phase fluid medium when the working conditions change, the present invention provides a sealing seal for the gas-liquid two-phase fluid medium under variable working conditions. device to solve the above problems

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  • A sealing device for gas-liquid two-phase fluid medium under variable working conditions
  • A sealing device for gas-liquid two-phase fluid medium under variable working conditions
  • A sealing device for gas-liquid two-phase fluid medium under variable working conditions

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Embodiment Construction

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0029] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Axial", "Radial", "Circumferential", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description,...

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Abstract

The invention relates to a sealing device for a gas-liquid two-phase fluid medium under variable working conditions. The sealing device has a rotating shaft and a casing, and the cavity formed by the casing is used to accommodate the gas-liquid two-phase fluid medium; the sealing The device also includes a cooperating labyrinth seal mechanism and a double-end hydrodynamic mechanical seal mechanism, and a seal buffer chamber is arranged between the labyrinth seal mechanism and the fluid dynamic mechanical seal mechanism, wherein the hydrodynamic mechanical seal The mechanism has a stationary ring and a moving ring that are in contact with each other. Through the design of the stepped trapezoidal convex teeth of the labyrinth seal channel, the throttling and pressure reduction effect of the labyrinth seal, and the attenuation of the medium pressure fluctuation by the seal buffer chamber, the structural design of the micropore group on the static ring end face, the dynamic ring seal end face The inclination design and the limit function of the limit sleeve realize the good sealing performance and sealing stability of the dynamic pressure seal of the gas-liquid two-phase fluid medium under variable working conditions.

Description

technical field [0001] The invention relates to the technical field of sealing devices, in particular to a sealing device for a gas-liquid two-phase fluid medium under variable working conditions. Background technique [0002] In the prior art, the fluid medium conveyed in the working chamber of some rotating machines is a gas-liquid two-phase fluid medium. When the working conditions of the rotating machinery change, the pressure of the gas-liquid two-phase fluid medium will fluctuate greatly. Since the gas is a compressible fluid, the gas will be compressed when the pressure increases, so that its volume ratio in the medium will decrease; and when the pressure decreases, the gas will expand, so that its volume ratio in the medium will increase. [0003] In the existing fluid dynamic mechanical seal devices, especially those with gas-liquid two-phase fluid medium, when the working conditions change, the opening failure of the end face often leads to the failure of the seal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/28F16J15/26F16J15/447
CPCF16J15/28F16J15/26F16J15/4472
Inventor 梁昌平岳巧萍刘军军易风王林
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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