CN202370591U - Sealing piece and radial sealing device comprising same - Google Patents

Abstract

The utility model provides a sealing piece. The sealing piece has an annular plate-like structure; a plurality of sealing boots are arranged on the radial outer side of the sealing piece along the circumferential direction; a slot is reserved between adjacent sealing boots; and each sealing boot is provided with a plurality of elastic beams and a plurality of holes formed between the adjacent elastic beams. The utility model also provides a radial sealing device comprising the sealing piece. The sealing piece and the radial sealing device comprising the sealing piece are high in sealing performance, compact in structure and easy to machine and produce.

Description

Diaphragm seal and comprise the apex combustion seal of sealing sheet

Technical field

The utility model relates to a kind of diaphragm seal and comprises the apex combustion seal of sealing sheet.

Background technique

At present, in gas turbine engine, the seal form that extensively adopts mainly contains: the sealing of comb tooth, end face seal, circumferential sealing and brush seal.These seal form exist certain pluses and minuses separately:

The sealing of comb tooth: simple in structure, but seal performance is poor, and sharply descend along with wearing and tearing can strengthen seal performance.

End face seal: seal performance is good, but size is big, often receives the restriction of spatial structure.

Circumferential sealing: utilize elastic element with the seal ring banding of some five equilibrium arcuate segments on sealing surface, to hinder the leakage of fluid, it is efficiently to the restriction gas leakage, but its structure is comparatively complicated.

Brush seal: seal performance be superior to combing tooth sealing, but its processing technology is complicated, and reliability is low, and cost is higher.

In addition, the finger tip sealing is a sealing technique of new development on the brush seal basis, and its processing cost is lower than brush seal, and seal performance is good.

An example of existing finger tip sealing has been shown among Fig. 1-3.The radially inner side of diaphragm seal 1 is provided with a plurality of seal shoes 2, between adjacent seal shoe 2, forms groove crack 3, each seal shoe 2 corresponding elastic beam 4.A seal shoe 2 and an elastic beam 4 form a finger tip.Diaphragm seal 1 forms seal arrangement 7 with sealing seat 5, front screen 6.In use, the radially inner side of diaphragm seal 1 contacts with rotating shaft 8, prevents that gas from leaking to low pressure area from the zone of high pressure.

This sealing configuration can only carry out performance optimization through changing curved beam molded lines and finger tip dimensional parameters, and the compactedness of radial dimension is restricted, and general finger tip seal arrangement can only adapt to stator-rotor finger tip sealing.

The model utility content

In order to address the above problem, the utility model proposes a kind of diaphragm seal and apex combustion seal thereof, has good seal performance, and compact structure, and manufacturing is simple.

First aspect according to the utility model; A kind of diaphragm seal is provided; Said diaphragm seal has the annular plate-like structure; Its radial outside upper edge is circumferentially with a plurality of seal shoes, has the groove crack between the adjacent seal shoe, and each seal shoe has a plurality of elastic beams and is respectively formed at a plurality of holes between the adjacent elastic beam.

Preferably, the radial outside upper edge of said diaphragm seal circumferentially evenly is provided with 10 seal shoes.

Preferably, each seal shoe has 3 elastic beams.

Preferably, said a plurality of elastic beam is of similar shape.

Preferably, said a plurality of elastic beam evenly distributes on said seal shoe.

Preferably, the molded lines of said a plurality of elastic beams (that is profile line) is straight line, broken line, curve or its combination.

Preferably, contiguous its radially inner side edge is circumferentially with a plurality of positioning holes on the said diaphragm seal.

Second aspect according to the utility model; A kind of apex combustion seal is provided; Said apex combustion seal comprises ring sealing base and diaphragm seal recited above, said sealing seat around and be fixed on the revolving part, said diaphragm seal around and be fixed on the said sealing seat.

Wherein, said apex combustion seal also comprises annular front screen, and said diaphragm seal is arranged between said sealing seat and the said front screen, comes said relatively sealing seat to fix said diaphragm seal through said front screen.

The beneficial effect of the utility model:

(1) each seal shoe is provided with a plurality of elastic beams, greatly reduces the gas leakage in the hole between a plurality of elastic beams of corresponding same seal shoe, thereby has improved seal performance;

(2) circumferentially offer seal shoe through being employed in the diaphragm seal external diameter, and peripheral groove crack number is few, makes the processing of diaphragm seal simpler;

(3) through quantity, shape and the distribution of quantity, shape and the elastic beam of seal shoe on the adjustment excircle, the rigidity of may command diaphragm seal makes its radial dimension compacter;

(4) this apex combustion seal is installed on the revolving part (for example rotating shaft), can the tight gap of micro-compensation sealing through the centrifugal action of rotation, and can fine raising sealability;

(5) this apex combustion seal adapts to two-spool seal form.

Description of drawings

Fig. 1 is the schematic representation of existing finger tip diaphragm seal;

Fig. 2 is the enlarged diagram of A portion among Fig. 1;

Fig. 3 is the sectional view of existing finger tip seal arrangement, and seal arrangement is installed on the static element and rotating shaft matches forms the finger tip sealing;

Fig. 4 is the schematic representation according to the diaphragm seal of the utility model;

Fig. 5 is the enlarged diagram of B portion among Fig. 4;

Fig. 6 is the sectional view according to the apex combustion seal of the utility model, and it comprises the diaphragm seal shown in Fig. 4.

10 diaphragm seals

11 positioning holes

20 seal shoes

30 groove cracks

40 elastic beams

41 holes

50 sealing seats

60 front screens

70 seal arrangements

80 rotating shafts

90 stationary wall

Embodiment

Specify preferred embodiment below in conjunction with accompanying drawing according to the diaphragm seal 10 of the utility model.

Fig. 4 and Fig. 5 show a preferred embodiment of the diaphragm seal 10 of the utility model.Diaphragm seal 10 has the annular plate-like structure, and its radial outside upper edge is circumferentially with a plurality of seal shoes 20, has groove crack 30 between the adjacent seal shoe 20, and each seal shoe 20 has a plurality of elastic beams 40 and is respectively formed at a plurality of holes 41 between the adjacent elastic beam 40.In the present embodiment, the radial outside upper edge of diaphragm seal 10 circumferentially evenly is provided with 10 seal shoes 20, and each seal shoe 20 has 3 elastic beams 40.Contiguous its radially inner side is along being circumferentially with a plurality of positioning holes 11, so that fitting tight sheet 10 on the diaphragm seal 10.

Preferably, a plurality of elastic beams 40 are of similar shape, and these elastic beams 40 evenly distribute on seal shoe 20, and its molded lines (profile line) is straight line, broken line, curve or its combination.

Fig. 6 shows the apex combustion seal 70 according to the utility model.This apex combustion seal 70 comprises ring sealing base 50, annular front screen 60 and a plurality of diaphragm seal 10, and diaphragm seal 10 is clamped between sealing seat 50 and the front screen 60.Front screen 60, diaphragm seal 10 and sealing seat 50 can be welded to connect through adding dowel fixes at positioning hole 11 places together or directly, form apex combustion seal 70.Sealing seat 50 is installed in the rotating shaft 80, can directly accomplish the location through key and locking nut, so that mounting or dismounting.

Cooperate with stationary wall 90 through diaphragm seal 10 to form sealing, be used for high and low nip is separated.

It is poor that the utility model has solved comb tooth sealing seal performance, and the end face seal size is big, the circumferential sealing processed complex; The brush seal cost is high; Finger tip sealing can only adapt to problems such as stator-rotor finger tip sealing and processed complex, and is easy for installation through the apex combustion seal that is formed by the sealing sheet, and seal arrangement is installed in and can fills up seal clearance through the rotating centrifugal elongation in the rotating shaft; Have good sealing effect, and can adapt to two-spool sealing.

Specific embodiment described in the utility model is merely the preferred embodiment of the utility model, is not the practical range that is used for limiting the utility model.Be that all equivalences of doing according to the content of the utility model claim change and modification, all belong to the protection domain of the utility model.

Claims (9)

1. diaphragm seal; It is characterized in that said diaphragm seal has the annular plate-like structure, its radial outside upper edge is circumferentially with a plurality of seal shoes; Have the groove crack between the adjacent seal shoe, each seal shoe has a plurality of elastic beams and is respectively formed at a plurality of holes between the adjacent elastic beam.

2. diaphragm seal according to claim 1 is characterized in that, the radial outside upper edge of said diaphragm seal circumferentially evenly is provided with 10 seal shoes.

3. diaphragm seal according to claim 1 and 2 is characterized in that, each seal shoe has 3 elastic beams.

4. diaphragm seal according to claim 1 and 2 is characterized in that, said a plurality of elastic beams are of similar shape.

5. diaphragm seal according to claim 1 and 2 is characterized in that, said a plurality of elastic beams evenly distribute on said seal shoe.

6. diaphragm seal according to claim 1 and 2 is characterized in that, the molded lines of said a plurality of elastic beams is straight line, broken line, curve or its combination.

7. diaphragm seal according to claim 1 and 2 is characterized in that, contiguous its radially inner side is along being circumferentially with positioning hole on the said diaphragm seal.

8. apex combustion seal; It is characterized in that; Said apex combustion seal comprises ring sealing base and according to each described diaphragm seal in the claim 1 to 7, said sealing seat around and be fixed on the revolving part, said diaphragm seal around and be fixed on the said sealing seat.

9. apex combustion seal according to claim 8 is characterized in that said apex combustion seal also comprises annular front screen, and said diaphragm seal is arranged between said sealing seat and the said front screen.

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