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Contact type labyrinth seal

A labyrinth sealing and contact technology, applied in the direction of engine sealing, engine components, mechanical equipment, etc., to achieve significant effect, simple structure, suitable for popularization and application

Pending Publication Date: 2018-05-25
许建中
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no matter how the flow section of the labyrinth channel is reduced, the transition section still exists, and the leakage through this section is still difficult to avoid.

Method used

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  • Contact type labyrinth seal
  • Contact type labyrinth seal
  • Contact type labyrinth seal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.

[0016] The first embodiment is a structural example of a contact labyrinth seal, such as figure 1 and figure 2 . The moving ring 7 and the static ring 1 of the axial labyrinth in this example are respectively a cylinder and a cylinder that is socketed with it and is tightly combined with two half rings. The cross-section of the shaft is rectangular, and the ring platform and the ring groove fit with each other with a gap, and the gap between the continuous fitting sections forms a labyrinth-sealed channel 5 . The ring belt at the bottom of the ring groove of the stationary ring matched with the outer edge of the ring platform of the moving ring is replaced by the elastic sealing ring 6 closely combined with the ring groove. The above is the description of the main structure of this example.

[0017] During installation, outside each ring platform o...

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Abstract

The invention belongs to sealing equipment, and discloses a contact type labyrinth seal. Transition matching sections with work resistance allowed by the labyrinth seal are additionally arranged in alabyrinth channel of the labyrinth seal. Transition fit is formed by utilizing the characteristic of elastic sealing filler adaptive shaping. An elastic component is additionally arranged or the method that the additionally-arranged space communicating with various sealing filler positions is filled with pressure applying media is utilized, and accordingly sealing filler pressure application and running abrasion compensation can be conducted. Even though the scheme disobeys the labyrinth non-contact concept, a labyrinth is further intensified so as to increase the continuous blocking force, and the gradual type leakage preventing blocking action is achieved. The transition fit maintaining capability can be improved through the elastic sealing filler, the elastic component and pressure applying medium filling, and accordingly the labyrinth blocking effect can be improved in a limited manner. The scheme is unique in concept, the structure is simple, the effect is clear, actions are obvious, and the contact type labyrinth seal is suitable for popularization and application.

Description

technical field [0001] The invention belongs to sealing equipment, and mainly relates to the structural improvement of a labyrinth seal. Background technique [0002] The well-known labyrinth seal is a sealing form that realizes limited and controllable leakage in a non-contact manner between seals with relative movement, and limitedly isolates the fluid channel between the two ends of the labyrinth seal, especially in the labyrinth channel. When the flow cross section and the relative channel length are small, the maximum sealing function of the labyrinth seal can be exerted under the condition of extremely low running resistance consumption. This structure is widely adopted in the occasions where it is needed, and a corresponding sealing effect is obtained. However, no matter how the flow section of the labyrinth channel is reduced, the transition section still exists, and the leakage through this section is still difficult to avoid. In addition, how to establish such an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/447F16J15/34F16J15/32
CPCF16J15/447F16J15/32F16J15/34
Inventor 战仕发陈震候宇明刘娟娟袭著专许翱许建中
Owner 许建中
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