CN202500616U

CN202500616U - Sealing device for tooth structure

Info

Publication number: CN202500616U
Application number: CN 201220108385
Authority: CN
Inventors: 杨家礼; 温泉; 涂孟罴; 李久山; 黄舜
Original assignee: China Aircraft Power Machinery Institute
Current assignee: China Aircraft Power Machinery Institute
Priority date: 2012-03-21
Filing date: 2012-03-21
Publication date: 2012-10-24
Anticipated expiration: 2022-03-21

Abstract

The utility model provides a sealing device for a tooth structure. The sealing device for the tooth structure comprises a rotor, the periphery of the rotor is provided with a plurality of teeth, a stator matched with the rotor and a stator inner ring on the inner wall of the stator, wherein the periphery of the rotor is provided with a plurality of comb teeth; a V-shaped through groove is formed on each comb tooth in the axial direction; a row of comb tooth openings are formed at one side of each V-shaped through groove; the orientation of each tooth opening is corresponding with the rotating direction of the rotor. Meanwhile, a white copper inner ring is welded on the inner wall of the stator. When the rotor rotates, once the comb teeth are rubbed with the stator on the inner wall, the tooth opening can be directly cut into the stator inner ring in the front side and cut out the V-shaped groove at the rubbing part as the direction of each tooth opening is corresponding with the rotating direction of the rotor, thus ensuring that the rest of the comb tooth is rotated in the V-shaped groove without block in a non-contact manner and avoiding rotor vibration.

Description

The densification device of comb toothing

Technical field

The utility model relates to the gas turbine field, especially, relates to a kind of densification device that is applied to the comb toothing of gas turbine.

Background technique

In gas turbine; For reducing the air loss of combustion gas in the runner; Improve the efficient of gas turbine; On the one hand should guarantee to comb as far as possible encircle in the comb tooth crown and stator in the toothing between less clearance, prevent again on the other hand that the gap is too small and cause colliding each other, thereby cause the situation of rotor oscillation.The densification device of traditional comb toothing, its rotating component comb tooth is complete ring gear, in the stator that matches with the comb tooth, applies on the ring being prone to the mill coating, when guaranteeing rational gap, the vibration of generation when the tooth of avoiding again combing is collided with stator.But comb tooth and stator bear the erosion of high temperature corrosion medium for a long time and are in for a long time in the rugged environment of periodic vibration, and the cohesive force that is prone to cause be prone to the mill coating reduces, coating shedding, thus influence the obturage efficient and the reliability of the densification device of comb toothing.

The model utility content

The utility model purpose is to provide a kind of densification device of improved comb toothing, with the densification device that solves existing comb toothing because the technical problem of the decreased performance that causes after the long-time running.

For realizing above-mentioned purpose; An aspect according to the utility model; A kind of densification device of the toothing of combing is provided, has comprised that the stator that is provided with rotor, the stator that cooperates with rotor of some comb teeth and is positioned at stator inwall place along periphery encircles, each comb tooth is offered the V-type groove vertically; Form row's comb land mouth at a side of each V-type groove, each comb land mouth towards consistent with the sense of rotation of rotor.

Further, the end face at the cutting edge of each comb land mouth place and the shaft axis of rotor are same plane.

Further; The periphery of rotor comprises first periphery and second periphery; On first periphery and second periphery, be extended with many row's comb teeth respectively; On every row combs tooth, offer the V-type groove that connects, the medial axis of the relative rotor of end face at the cutting edge place of the comb land mouth on first periphery and second periphery becomes 90 ° angle.

Further, the edge direction of the comb land mouth on the edge direction of the comb land mouth on first periphery and second periphery is consistent.

Further, soldering has ring in the copper-nickel alloy on the inwall of stator.

The utlity model has following beneficial effect: comb land mouth on the comb tooth along circumferential towards consistent with the sense of rotation of rotor; In the rotor rotation process; In case ring hangs in comb tooth and the stator; Ring and frustrate at the place of hanging and to cut out the V-type groove in can be the directly positive incision stator of comb land mouth, and comb tooth remaining part can accessible untouchable rotation in this V-type groove, has avoided the vibration of rotor.In the preferred embodiment, the setting of the stepped periphery of comb tooth, the aeroelasticity power that has reduced in the comb tooth cavity causes the possibility of rotor self-excited vibration, thus the stability when further having guaranteed the rotor proper functioning.Simultaneously, ring in the copper-nickel alloy is brazed in the stator inwall, is integrally formed with matrix, interior ring can not come off, and has increased the reliability that the comb toothing is obturaged.

Except top described purpose, feature and advantage, the utility model also has other purpose, feature and advantage.To do further detailed explanation to the utility model with reference to figure below.

Description of drawings

The accompanying drawing that constitutes the application's a part is used to provide the further understanding to the utility model, and illustrative examples of the utility model and explanation thereof are used for explaining this, do not constitute the improper qualification to the utility model.In the accompanying drawings:

Fig. 1 is the structural representation of densification device of the comb toothing of the utility model preferred embodiment;

Fig. 2 is the structural representation of the rotor of the utility model embodiment Fig. 1;

Fig. 3 is the partial schematic diagram of the utility model embodiment Fig. 2 at a place; And

Fig. 4 be the utility model preferred embodiment Fig. 1 the structural representation of rotor.

Embodiment

Embodiment to the utility model is elaborated below in conjunction with accompanying drawing, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.

Referring to Fig. 1, the densification device of the comb toothing of the utility model comprises rotor 10, stator 20 that cooperates with rotor 10 that is provided with comb tooth 1 and the stator that is positioned at stator 20 inwall places ring 2.

Fig. 2 is the structural representation of rotor 10, and b representes the sense of rotation of rotor 10.On the periphery of rotor 10, convex with at interval the comb teeth 1 of many row's annulars, arrange comb tooth 1 more and distribute uniformly along the periphery of rotor 10.Cut logical V-type groove 11 that the cross section is a V-arrangement vertically from the root of comb tooth 1, V-type groove 11 connects above-mentioned all comb teeth 1.See Fig. 3 for details, a side of each V-type groove 11 forms comb land mouth 110, and the end face at comb land mouth 110 places and the shaft axis of rotor 10 are same plane.Simultaneously, comb land mouth 110 along circumferential towards consistent with the sense of rotation b of rotor 10.

Preferably; In order to reduce the possibility that aeroelasticity power in comb tooth 1 tooth cavity causes rotor 10 self-excited vibrations; As shown in Figure 4; The periphery of rotor 10 is set to the ladder shaft part, and to form first periphery and second periphery, wherein the distance in the axle center of the anchor ring arrival rotor 10 at first periphery place arrives the distance in the axle center of rotor 10 greater than the anchor ring at second periphery place.Wherein, also be extended with the comb teeth 1 of many row's annulars on first periphery and second periphery respectively, arrange comb tooth 1 more and distribute uniformly along the periphery of rotor 10, the comb tooth 1 on first periphery also becomes stepped with comb tooth 1 on second periphery.And; Every row combs on the tooth 1; Respectively offer the V-type groove 11 that connects vertically; The comb land mouth 110 of two V-type grooves 11 consistent with the sense of rotation b of rotor 10 towards all, simultaneously, the medial axis of the relative rotor 10 of end face at the cutting edge place of the comb land mouth 110 on first periphery and second periphery becomes 90 ° angle.

Refer again to Fig. 1, ring 2 is selected high temperature resistant, corrosion-resistant, processibility and the good copper-nickel alloy of welding performance for use in the stator.For guaranteeing the higher efficient of obturaging of gas turbine; Tooth 1 and interior 2 the gap of encircling of stator as far as possible must reduce to comb; Simultaneously; The factors such as inconsistency of each the part thermal expansion phenomenon that hangs that ring 2 produces in tooth 1 and the stator that causes combing when preventing rigidity, the work of accuracy of manufacturing, rotor 10 and casing owing to part hangs and then is prone to bring out rotor 10 vibrations.For the densification device of the comb toothing that relates to for the utility model; Gas turbine is in running; Because the edge direction of comb land mouth 110 is consistent with the sense of rotation b of rotor 10, in case ring 2 hangs in comb tooth 1 and the stator, comb land mouth 110 can directly positively cut that stator is interior to encircle 2 and frustrate at the place of hanging and to cut out the V-type groove; And comb tooth 1 remaining part can accessible untouchable rotation in this V-type groove, has avoided the vibration of rotor 10.In the preferred embodiment of the utility model, the setting of stepped two-layer comb tooth 1 has reduced the possibility that aeroelasticity power in comb tooth 1 chamber causes rotor 10 self-excited vibrations, the stability when further having guaranteed rotor 10 proper functioning.

The peeling off of the coating layer of ring 2 in the stator of routine, preferably, the coating layer of ring 2 changes the structural type that soldering has copper-nickel alloy in the stator, thereby ring in the copper-nickel alloy and matrix stator 20 are constituted one.

The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model model utility can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.

Claims

1. the densification device of the toothing of combing; It is characterized in that; Comprise: be provided with rotor (10), the stator (20) that cooperates with said rotor (10) of some comb teeth (1) and be positioned at the stator ring (2) at said stator (20) inwall place along periphery; Each said comb tooth (1) is offered V-type groove (11) vertically, forms row's comb land mouth (110) at a side of each said V-type groove (11), each said comb land mouth (110) towards consistent with the sense of rotation of said rotor (10).

2. the densification device of comb toothing according to claim 1 is characterized in that, the end face at the cutting edge place of each said comb land mouth (110) and the shaft axis of said rotor (10) are same plane.

3. the densification device of comb toothing according to claim 1; It is characterized in that; The periphery of said rotor (10) comprises first periphery and second periphery; On said first periphery and said second periphery, be extended with many row's said comb teeth (1) respectively, on the said comb tooth of every row (1), offer the said V-type groove (11) that connects, the medial axis of the said relatively rotor of end face (10) at the cutting edge place of the said comb land mouth (110) on said first periphery and said second periphery becomes 90 ° angle.

4. the densification device of comb toothing according to claim 3 is characterized in that, the edge direction of the said comb land mouth (110) on the edge direction of the said comb land mouth (110) on said first periphery and said second periphery is consistent.

5. the densification device of comb toothing according to claim 4 is characterized in that, soldering has ring in the copper-nickel alloy on the inwall of said stator (20).