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A t-shaped staggered labyrinth seal that can eliminate rotor excitation force

A technology of labyrinth sealing and exciting force, applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of increasing the original gap of the seal, reducing the sealing performance, damaging the rotor, etc., so as to improve the sealing performance and reduce the leakage. , The effect of reducing the amount of seal leakage

Active Publication Date: 2017-05-24
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A large number of numerical calculations and experiments have proved that the high-speed rotating rotor will produce obvious eccentric vibration, making it easy to rub against the seal, which will damage the rotor and increase the original gap of the seal, reducing the sealing performance

Method used

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  • A t-shaped staggered labyrinth seal that can eliminate rotor excitation force
  • A t-shaped staggered labyrinth seal that can eliminate rotor excitation force
  • A t-shaped staggered labyrinth seal that can eliminate rotor excitation force

Examples

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Embodiment Construction

[0016] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0017] In combination with Figures 1 to 3, the technical solution adopted by the present invention is: by designing the T-shaped structure of the low teeth in the staggered teeth, the force of the gas in the flow field in the sealed cavity can be reversed in addition to acting on the rotor. The direction acts on the T-ring that is connected to the rotor. In this way, most of the gas force can be canceled in the radial direction.

[0018] In Figure 1, the entire sealing ring is assembled from 6 independent sector rings. The sector angles of the six sector rings are all 60°, which can ensure the clamping and positioning of the sealing ring and the casing, and at the same time have the characteristics of convenient installation and disassembly and prevention of excessive deformation.

[0019] The sealed low teeth 2 are installed on the rotor 1, and 3 is the high te...

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Abstract

The invention aims to provide a T-shaped staggered-type labyrinth seal capable of eliminating rotor exciting force. The T-shaped staggered-type labyrinth seal comprises fan-shaped rings. The fan-shaped rings comprise seal cavities and rotors. The seal cavities and the rotors are respectively of a fan-shaped structure, the seal cavities are located outside the rotors, high teeth are arranged arranged on the inner sides of the seal cavities, low teeth are arranged on the outer sides of the rotors, annular seal rings are installed on the low teeth, installation crowns are installed on the outer sides of the seal cavities and spring grooves are formed in the installation crowns. According to the T-shaped staggered-type labyrinth seal capable of eliminating the rotor exciting force, the seal structure formed by the annular seal rings and the low teeth is used for enabling gas forces exerted on the rotors by leaked gas to be mutually cancelled out in the radial direction. Thus, the gas exciting forces borne by the rotors can be eliminated, vibration of the rotors can be reduced and stable running of a rotation part can be guaranteed. Meanwhile, the seal structure formed by combining the high teeth and the low teeth can further greatly reduce leakage and improve the sealing performance.

Description

technical field [0001] The invention relates to a sealing device, in particular to a sealing device for a turbomachinery rotor. Background technique [0002] At present, with the development of turbomachinery, the requirements for the rotor are constantly increasing, and the design of the seal is not only to reduce the leakage in the sealing passage as the sole goal. For rotor dynamic seals, reducing the wear between the rotor and the seal while preventing leakage is more important than simply reducing leakage. [0003] A large number of numerical calculations and experiments have proved that the high-speed rotating rotor will produce obvious eccentric vibration, making it easy to rub against the seal, which will damage the rotor and increase the original gap of the seal, reducing the sealing performance. Especially for widely used staggered labyrinth seals, in addition to the eccentric vibration caused by the mass force of the rotor itself, the gas force generated in the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/447
Inventor 张海郑群
Owner HARBIN ENG UNIV
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