CN205559800U

CN205559800U - Labyrinth sealing device

Info

Publication number: CN205559800U
Application number: CN201620153019.4U
Authority: CN
Inventors: 邓伦胜
Original assignee: 邓伦胜
Current assignee: New Polytron Technologies Inc in Hubei
Priority date: 2016-02-29
Filing date: 2016-02-29
Publication date: 2016-09-07
Anticipated expiration: 2026-02-28

Abstract

The utility model provides a labyrinth sealing device includes rotating ring and quiet ring at least, the cross -section of rotating ring is anti - C style of calligraphy, including first inner ring, first go -between and first outer loop, three's formula structure as an organic whole all is provided with bellied first sealed ring gear on the inside and outside disc of first outer loop, the cross -section of quiet ring be the C style of calligraphy, including second inner ring, second go -between and second outer loop, three's formula structure as an organic whole, all be provided with bellied second on the interior disc of second outer loop and on the endocyclic outer disc of second and seal up the ring gear, the mutual buckle of quiet ring sum rotating ring installation, first outer loop lies in between the second ring sum second outer loop, the second inner ring lies in between first outer loop and the first inner ring, and first sealed ring gear and the sealed ring gear of second crisscross distribution the each other, the oil storage tank of common formation complications between rotating ring and the quiet ring. The utility model provides a not enough among the prior art, the the device leakproofness is good, life is high, can avoid the grease to reveal.

Description

A kind of labyrinth gland

Technical field

This utility model provides a kind of sealing device, belongs to technical field of sealing technology.

Background technology

Labyrinth seal is to set several belt sealing teeth being arranged in order around rotary shaft, is formed a series of between tooth and tooth Dam gap and expand cavity, sealed medium when by the gap in tortuous labyrinth generation throttle effect and reach Drain Resistance The device of purpose.Owing to there is gap between the rotor of labyrinth seal and casing, without solid contact, and allow thermal expansion, Therefore adapt to high temperature, high pressure, the occasion of high speed-frequency, this seal form be widely used in steam turbine, gas turbine, Compressor, the axle head of aerator and the sealing of each inter-stage.

Using at some requires in stricter occasion, lubricating oil in sealing device annular seal space to be reached Zero leakage, but also to reach to prevent the pollutant in the external world from entering the purpose within annular seal space, additionally, for sealing member Service life also have higher requirement, therefore it provides a kind of sealing property is the most excellent, and long perfomance life Sealing device, become this area problem demanding prompt solution.

Summary of the invention

This utility model provides a kind of labyrinth gland, solves the deficiency in background technology, this labyrinth gland Good airproof performance, high life, it is possible to avoid oils and fats to reveal.

Realizing the technical scheme that this utility model above-mentioned purpose used is:

A kind of labyrinth gland, at least includes rotating ring and stationary ring, and rotating ring is fixed in rotary shaft and revolves with rotary shaft Turning, stationary ring is fixed on equipment end lid, and described stationary ring is enclosed within rotating ring and both rotate against, the cross section of described rotating ring In anti-C font, including the first internal ring, the first connection ring and the first outer shroud, three is integral type structure, the first outer shroud The first sealing ring gear of projection it is provided with on inside and outside disc；The cross section of described stationary ring is C font, in second Ring, second connecting ring and the second outer shroud, three is integral type structure, on the inner headed face of the second outer shroud and the second internal ring Periphery on be provided with projection second sealing ring gear；Described stationary ring and the mutual buckle of rotating ring are installed, the first outer shroud Between the second internal ring and the second outer shroud, the second internal ring is between the first outer shroud and the first internal ring, and first seals tooth Ring and second seals the interlaced distribution of ring gear, is collectively forming the oil storage tank of complications between rotating ring and stationary ring；Described second The bottom of the second sealing ring gear on outer shroud is provided with backflow hole slot, and the oils and fats in oil storage tank returns sealing via return port concentrated flow In chamber.

Being provided with annular recess on the periphery of described second outer shroud, be provided with O-ring seals in groove, described O shape is close Seal contacts with equipment end cap.

Be provided with positioning step on the periphery of described second outer shroud, positioning step be positioned at the second outer shroud two ends, left and right or in Portion, stationary ring is connected to a fixed with equipment end cap by positioning step.

Compared with prior art, this utility model has the advantage that the labyrinth gland that this utility model provides makes Used time, the lubricant grease in annular seal space is by entering oil storage tank between the first outer tooth ring and the second outer tooth ring, set in oil storage tank The the first sealing ring gear put and second seals ring gear and oils and fats can be stoped to leak from oil storage tank, also is able to stop the external world simultaneously Dirt entered annular seal space by oil storage tank.Additionally, the bottom of the second sealing ring gear on the second described outer shroud is provided with back Discharge orifice groove, the oils and fats in oil storage tank returns in annular seal space via return port concentrated flow.

Accompanying drawing explanation

The structural representation of the labyrinth gland that Fig. 1 provides for this utility model；

In figure: 1-rotary shaft, 2-refluxes hole slot, and 3-the first internal ring, 4-first connects ring, and 5-the first outer shroud, 6-O shape is close Seal, 7-first seals ring gear, 8-the second internal ring, and 9-second connects ring, 10-the second outer shroud, 11-positioning step, 12- Second seals ring gear.

Detailed description of the invention

Below in conjunction with the accompanying drawings this utility model is done detailed specific description.

The structure of the labyrinth gland that this utility model provides is as it is shown in figure 1, at least include rotating ring and stationary ring, and rotating ring is solid Rotating in rotary shaft 1 and with rotary shaft, stationary ring is fixed on equipment end lid, and described stationary ring is enclosed within rotating ring And both rotate against, the cross section of described rotating ring is anti-C font, connects ring 4 and first including the first internal ring 3, first Outer shroud 5, three is integral type structure, and the inside and outside disc of the first outer shroud 5 is provided with the first sealing ring gear of projection 7。

The cross section of described stationary ring is C font, connects ring 9 and the second outer shroud 10 including the second internal ring 8, second, and three Person is integral type structure, the periphery of described second outer shroud 10 is provided with annular recess, is provided with O shape close in groove Seal 6, described O-ring seals 6 contacts with equipment end cap.It is provided with positioning table on the periphery of described second outer shroud Rank 11, positioning step 11 is positioned at the left end of the second outer shroud, and stationary ring is connected to a fixed with equipment end cap by positioning step.

The second sealing ring gear of projection it is provided with on the inner headed face of the second outer shroud 10 and on the periphery of the second internal ring 8 12；Described stationary ring and the mutual buckle of rotating ring are installed, and the first outer shroud is between the second internal ring and the second outer shroud, in second Ring is between the first outer shroud and the first internal ring, and first seals ring gear and the second sealing interlaced distribution of ring gear, rotating ring And between stationary ring, it is collectively forming the oil storage tank of complications.Lubricant grease in annular seal space by the first outer tooth ring and the second outer tooth ring it Between enter oil storage tank, the first sealing ring gear and second set in oil storage tank seals ring gear and oils and fats can be stoped from oil storage tank In leak, also be able to stop extraneous dirt to be entered annular seal space by oil storage tank simultaneously.Described on the second outer shroud second is close The bottom of envelope ring gear is provided with backflow hole slot 2, and the oils and fats in oil storage tank flows back in annular seal space via backflow hole slot 2.

Claims

1. a labyrinth gland, at least includes rotating ring and stationary ring, and rotating ring is fixed in rotary shaft and with rotary shaft one Rising and rotate, stationary ring is fixed on equipment end lid, and described stationary ring is enclosed within rotating ring and both rotate against, it is characterised in that: The cross section of described rotating ring is anti-C font, and including the first internal ring, the first connection ring and the first outer shroud, three is that integral type is tied Structure, the inside and outside disc of the first outer shroud is provided with the first sealing ring gear of projection；The cross section of described stationary ring is C word Type, including the second internal ring, the second connection ring and the second outer shroud, three is integral type structure, the inner headed face of the second outer shroud Above and it is provided with the second sealing ring gear of projection on the periphery of the second internal ring；Described stationary ring and the mutual buckle of rotating ring Install, the first outer shroud between the second internal ring and the second outer shroud, the second internal ring between the first outer shroud and the first internal ring, And first seal ring gear and second seal the interlaced distribution of ring gear, be collectively forming between rotating ring and stationary ring complications oil storage Groove；The bottom of the second sealing ring gear on the second described outer shroud is provided with backflow hole slot, and the oils and fats in oil storage tank is via returning Discharge orifice concentrated flow returns in annular seal space.

Labyrinth gland the most according to claim 1, it is characterised in that: on the periphery of described second outer shroud Being provided with annular recess, be provided with O-ring seals in groove, described O-ring seals contacts with equipment end cap.

Labyrinth gland the most according to claim 1, it is characterised in that: on the periphery of described second outer shroud Being provided with positioning step, positioning step is positioned at two ends, left and right or the middle part of the second outer shroud, and stationary ring passes through positioning step and equipment End cap is connected to a fixed.