CN209483934U - Floating seal and rotary machine for rotary machine - Google Patents

Abstract

The utility model discloses a kind of floating seals and rotary machine for rotary machine, the rotary machine includes quiet body and rotor, the quiet body is around the rotor, the rotary machine has high-voltage end and low-pressure end, the floating seal includes ring body, the ring body has a first end and a second end, high-voltage end of the first end of the ring body adjacent to the rotary machine, low-pressure end of the second end of the ring body adjacent to the rotary machine, the inner peripheral surface of the ring body has groove, the groove extends from the second end of end face towards the ring body of the first end of the ring body, the ring body is looped around between the quiet body and the rotor, the ring body is with the quiet mates and along the radially displaceable of the ring body.The floating seal of the utility model, not easy to wear, long service life improves sealing effect.

Description

Floating seal and rotary machine for rotary machine

Technical field

The utility model relates to technical field of sealing technology, and in particular, to a kind of floating seal for rotary machine And rotary machine.

Background technique

It usually requires to be sealed fluid in the rotary machine of the compressor or turbine of gas turbine etc., be let out with reducing Leakage, guarantees the normal work of rotary machine.In the related technology, between the compressor of gas turbine or the grade of the component in turbine and axis End generallys use the sealing of comb tooth, flows to low-pressure area from higher-pressure region with control chamber interior air-flow, and prevent the air-flow in mainstream channel from invading Enter chamber interior, i.e. realization sealing effect.

However, gap is larger for obturaging between existing comb tooth sealing and rotor, cause the leakage rate of gas big.Together When, due to being easy to happen circular runout and axle center whirling motion when rotor high speed rotation, the sealing of comb tooth is easy to grind with rotor It touches, so that the sealing of comb tooth and rotor surface are worn, reduces sealing effect.

Summary of the invention

The utility model is intended to solve at least some of the technical problems in related technologies.For this purpose, this reality A kind of floating seal for rotary machine is proposed with novel one side, not easy to wear, long service life improves Sealing effect.

On the other hand the utility model also proposed a kind of rotary machine.

The floating seal for rotary machine of the embodiment of first aspect according to the present utility model, the revolution Machinery includes quiet body and rotor, and the quiet body has high-voltage end and low-pressure end, institute around the rotor, the rotary machine Stating floating seal includes ring body, and the ring body has a first end and a second end, and the first of the ring body Hold the high-voltage end of the neighbouring rotary machine, the second end of the ring body adjacent to the rotary machine low-pressure end, it is described The inner peripheral surface of ring body has a groove, and the groove is from the end face of the first end of the ring body towards the ring body Second end extend, the ring body is looped around between the quiet body and the rotor, the ring body with it is described quiet Mates and along the radially displaceable of the ring body.

According to the floating seal for rotary machine of the utility model embodiment, pass through the inner circumferential in ring body Face opens up above-mentioned groove, keeps it not easy to wear, and long service life improves sealing effect.

In some embodiments, the groove and the end surfaces of the second end of the ring body are opened.

In some embodiments, axially inclined setting of the extending direction of the groove relative to the ring body.

In some embodiments, the tilt angle of the groove is 0 °~90 °.

In some embodiments, the depth of the inner peripheral surface of the recessed ring body of the groove is 1~50 μm.

In some embodiments, the groove has multiple, and multiple grooves are along the circumferentially-spaced of the ring body Arrangement.

In some embodiments, the groove is linear type groove.

In some embodiments, the cross section of the groove is elongated.

In some embodiments, the groove has multiple, and multiple grooves are along the circumferential uniform of the ring body Arranged for interval, axially inclined setting of the extending direction of each groove relative to the ring body, multiple grooves Tilt angle it is identical and inclined direction is consistent.

In some embodiments, the floating seal further includes the first extension and the second extension, and described first Extension is from outer peripheral surface the extending radially outwardly along the ring body of the ring body, and second extension is from described The outer end of first extension is extended axially outward along the ring body, and the inner peripheral surface of the quiet body has a card slot, and described the The cooperation of two extensions is in the card slot and in the card slot along the radially displaceable of the ring body.

The rotary machine of the embodiment of second aspect according to the present utility model includes: entry guide vane component, the import Guide vane assembly includes guide vane and inner ring, and the outer peripheral surface of the inner ring is connected with the guide vane；Rotor, the inner ring are looped around It is opened on the rotor and with the rotor intervals；Movable vane, the movable vane are located on the rotor, the movable vane and the guide vane It is relative to each other and spaced apart in the axial direction of the rotor；Floating seal, the floating seal are located at the inner ring Between the rotor, air-flow can enter the gap between the movable vane and the guide vane through the floating seal with close The gap is sealed, wherein the floating seal includes ring body, the inner peripheral surface of the ring body is equipped with groove, described recessed The end face of the one end of slot from the ring body far from the movable vane towards the ring body the neighbouring movable vane one End extends, described in the ring body winding between inner ring and the rotor, the ring body matched with the inner ring and Along the radially displaceable of the ring body.

In some embodiments, the groove has multiple, and multiple grooves are along the circumferential uniform of the ring body Arranged for interval, axially inclined setting of the extending direction of the groove relative to the ring body, the inclination angle of the groove Degree is 0 °~90 °, and the tilt angle of multiple grooves is identical and inclined direction is consistent.

In some embodiments, the depth of the inner peripheral surface of the recessed ring body of the groove is 1~50 μm, and described The cross section of groove is elongated.

In some embodiments, the floating seal further includes the first extension and the second extension, and described first Extension is from outer peripheral surface the extending radially outwardly along the ring body of the ring body, and second extension is from described The outer end of first extension is extended axially outward along the ring body, and the inner peripheral surface of the inner ring is equipped with card slot, and described the The cooperation of two extensions is in the card slot and in the card slot along the radially displaceable of the ring body.

Detailed description of the invention

Fig. 1 is the structural schematic diagram according to the rotary machine of the utility model embodiment.

Fig. 2 is the structural schematic diagram according to the floating seal for rotary machine of the utility model embodiment.

Fig. 3 is the Section A-A figure in Fig. 2 according to the floating seal of the utility model embodiment.

Appended drawing reference:

Quiet body (entry guide vane component) 1, card slot 10, guide vane 11, inner ring 12, rotor (rotor) 2, floating seal 3, ring body 31, groove 310, the first extension 32, the second extension 33, movable vane 4.

Specific embodiment

The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings.Below by The embodiment being described with reference to the drawings is exemplary, it is intended to for explaining the utility model, and should not be understood as practical new to this The limitation of type.In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", The orientation or positional relationship of the instructions such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " is based on the figure Orientation or positional relationship is merely for convenience of describing the present invention and simplifying the description, rather than the dress of indication or suggestion meaning It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model Limitation.

Below with reference to the accompanying drawings 1-3 describes the rotary machine according to the utility model embodiment and the floating for rotary machine Sealing device.

As shown in Figure 1, including that quiet body 1, rotor 2 and floating seal fill according to the rotary machine of the utility model embodiment 3 are set, quiet body 1 has high-voltage end (left end shown in FIG. 1) and the low-pressure end (right side shown in FIG. 1 around rotor 2, rotary machine End), floating seal 3 is looped around between quiet body 1 and rotor 2, and floating seal 3 is located at the inner peripheral surface of quiet body 1.By This, air-flow can flow to the side of the neighbouring low-pressure end of quiet body 1 from the side of the neighbouring high-voltage end of quiet body 1 through floating seal 3 (shown in arrow as shown in Figure 1, air-flow can the left side of quiet body 1 right side of quiet body 1 is flowed to through floating seal 3).

The floating seal 3 for rotary machine according to the utility model embodiment is described below.

As shown in Figure 1-3, including annular according to the floating seal 3 for rotary machine of the utility model embodiment Ontology 31, ring body 31 are looped around between quiet body 1 and rotor 2, and ring body 31 is matched with the inner peripheral surface of quiet body 1. Wherein ring body 31 has a first end and a second end, the first end of ring body 3 adjacent to rotary machine high-voltage end, as Fig. 1, The left end of ring body 3 shown in 3, low-pressure end of the second end of ring body 3 adjacent to rotary machine, ring as shown in Figure 1,3 The right end of shape ontology 3.The inner peripheral surface of ring body 31 has a groove 310, and groove 310 is from the end face of the first end of ring body 31 The second end of (left side of Fig. 1, ring body 31 shown in 3) towards ring body 31 extends.

When air-flow passes through the floating seal 3 with above-mentioned groove 310, since the week in ring body 31 is concave up Slot 310 forms convergence gap, and floating seal 3 generates dynamic pressure effect under the rotary motion of rotor 2 and suspends, floats Dynamic sealing device 3 will not be contacted with the outer peripheral surface of rotor 2, it is therefore prevented that grind the generation touched.Moreover, starting to work in rotary machine When, floating seal 3 is under the action of the buoyancy lift generated by dynamic pressure effect, between floating seal 3 and rotor 2 Seal clearance becomes larger, and the seal clearance to become larger equally affects dynamic pressure effect, and seal clearance, which becomes larger, causes dynamic pressure effect to subtract Weak, buoyancy lift becomes smaller, and seal clearance starts to become smaller, and finally reaches equilibrium state.It can be realized by floating seal 3 as a result, The process for automatically adjusting the seal clearance advantageously reduces leakage.

According to the floating seal 3 for rotary machine of the utility model embodiment, by ring body 31 Inner peripheral surface opens up above-mentioned groove 310, is clearance-type circumferential sealing, which can adapt to the circular runout of the rotor 2 of rotation It is moved radially with axle center whirling motion, eliminates hard contact between the floating seal 3 being likely to occur and rotor 2 and cause Fretting wear, control to seal clearance when ensure that floating seal work is conducive to reduce leakage.Moreover, passing through Above-mentioned groove is set, is overcome since gas viscosity is low, dynamic pressure effect is small, and is difficult to avoid sealing device and rotor indirectly The case where touching wiping, conducive to the service life for increasing sealing device.

In some specifically embodiments, (annular shown in Fig. 3 is originally for the end face of the second end of groove 310 and ring body 31 The right side of body 31) it is spaced apart.In other words, as shown in figure 3, groove 310 does not extend to the right side of groove 310, i.e. groove 310 Right side and ring body 31 right side it is spaced a distance.

In some embodiments, axially inclined setting of the extending direction of groove 310 relative to ring body 31.Change speech It, the not horizontal extension of groove 310, but relative to favouring horizontal direction predetermined angular, it is recessed in section as shown in Figure 3 Slot 310 is tilted by a predetermined angle upwards relative to horizontal direction.Specifically, the tilt angle of groove 310 is 0 °~90 °.

It is understood that inclined groove 310 is arranged by the inner peripheral surface in ring body 31, dynamic pressure effect can be increased It answers, generates biggish buoyancy lift, be further conducive to adjust the seal clearance between floating seal 3 and rotor 2.

In some embodiments, groove 310 is linear type groove.In other words, as shown in figure 3, the side wall surface of groove 310 is equal For straight line.

In some embodiments, the depth of the inner peripheral surface of the recessed ring body 31 of groove 310 is 1~50 μm.

In some embodiments, groove 310 has multiple, circumferentially-spaced arrangement of multiple grooves 310 along ring body 31. In the description of the present invention, the meaning of " plurality " is at least two, such as two, three etc., unless otherwise clearly specific Restriction.

Further, multiple grooves 310 are arranged along the circumferential uniform intervals of ring body 31, i.e., two neighboring groove 310 The distance between it is identical.Further, multiple grooves 310 are identical relative to the axial tilt angle of ring body 31 and incline Tilted direction is consistent.In other words, each groove 310 tilts towards the same direction and inclines relative to the axial of ring body 31 Rake angle is identical.

In some embodiments, the cross section of groove 310 is elongated.In other words, as shown in figure 3, the extension of groove 310 Length is greater than length of the groove 310 in the circumferential direction of ring body 31.

In some embodiments, quiet body 1 has card slot 10, and floating seal 3 further includes the first extension 32 and second Extension 33, from outer peripheral surface the extending radially outwardly along ring body 31 of ring body 31, second extends the first extension 32 Portion 33 is from outer end the extending axially outward along ring body 31 of the first extension 32, and the cooperation of the second extension 33 is in card slot 10 And along the radially displaceable of ring body 31 in card slot 10.

In other words, as shown in Figure 1,3, the first extension 32 is from the outer peripheral surface of ring body 31 along the radial direction of ring body 31 Extend to the direction at the center far from ring body 31, the second extension 33 is from the first extension 32 far from the ring body The outer peripheral surface of 31 one end extends to the direction at the center far from the first extension 32 in left-right direction, i.e. the second extension 33 It is axial axial consistent with ring body 31, and the second extension 33 and ring body 31 ring body 31 radially each other It is opposite and spaced apart each other by the first extension 32.Wherein card slot 10 of the second extension 33 cooperation in the inner peripheral surface of quiet body 1 It is interior and in card slot 10 along the radially displaceable of ring body 31.Term " first ", " second " in the description of the present invention, It is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.

Below with reference to the accompanying drawings 1 the rotary machine according to one specific embodiment of the utility model is described.

As shown in Figure 1, the rotary machine of embodiment according to the present utility model includes entry guide vane component 1, rotor 2, moves Leaf 4 and floating seal 3, entry guide vane component 1 include guide vane 11 and inner ring 12, the outer peripheral surface and guide vane 11 of inner ring 12 It is connected, inner ring 12 is looped around on rotor 2 and is spaced apart with rotor 2.Specifically, entry guide vane component 1 and rotor 2 are coaxially disposed.

Movable vane 4 is located on rotor 2, i.e., is connected with the outer surface of rotor 2, the axial direction of movable vane 4 and guide vane 11 in rotor 2 It is relative to each other and spaced apart on (left and right directions shown in FIG. 1)；

Floating seal 3 is located between inner ring 12 and rotor 2, and air-flow can enter movable vane 4 and lead through floating seal 3 Gap (as shown by the arrows in Figure 1) between blade 11 is to seal the gap.As shown in Figure 2,3, floating seal 3 includes ring Shape ontology 31, the inner peripheral surface of ring body 31 are equipped with groove 310, and groove 310 is from one end of the separate movable vane 4 of ring body 31 End face (left side of Fig. 1, ring body 31 shown in 3) towards ring body 31 neighbouring movable vane 4 one end (Fig. 1, shown in 3 Ring body 31 right end) extend, ring body 31 is wound around between inner ring 12 and rotor 2, ring body 31 and inner ring 12 It matches and along the radially displaceable of ring body 31.It is understood that in this embodiment, by being used for for previous embodiment The floating seal 3 of rotary machine is mounted between entry guide vane component 1 and rotor 2.

In some specifically embodiments, end face (Fig. 1,3 of one end of the neighbouring movable vane 4 of groove 310 and ring body 31 Shown in ring body 31 right side) be spaced apart, groove 310 be linear type groove and elongated, the extension side of groove 310 To 0 °~90 ° of axially inclined predetermined angular relative to ring body 31, the inner peripheral surface of the recessed ring body 31 of each groove 310 Depth be 1~50 μm.

In some specifically embodiments, groove 310 have it is multiple, multiple grooves 310 along ring body 31 it is circumferential The tilt angle of even arranged for interval, each and multiple grooves 310 is identical and inclined direction is consistent.

In some specifically embodiments, the inner peripheral surface of inner ring 12 has card slot 10, and floating seal 3 further includes first Extension 32 and the second extension 33, the first extension 32 from the outer peripheral surface of ring body 31 along ring body 31 radially outward Extend, outer end extending axially outward along ring body 31 of second extension 33 from the first extension 32, the second extension 33 Cooperation is in card slot 10 and in card slot 10 along the radially displaceable of ring body 31.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term It states and is necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with It can be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this field Technical staff can by the feature of different embodiments or examples described in this specification and different embodiments or examples into Row combination and combination.

In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be Mechanical connection is also possible to be electrically connected or can communicate each other；It can be directly connected, the indirect phase of intermediary can also be passed through Even, the connection inside two elements or the interaction relationship of two elements be can be, unless otherwise restricted clearly.For this For the those of ordinary skill in field, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.

In the present invention unless specifically defined or limited otherwise, fisrt feature is in the second feature " on " or " down " It can be that the first and second features directly contact or the first and second features are by intermediary mediate contact.Moreover, first is special Sign can be fisrt feature above the second feature " above ", " above " and " above " and be directly above or diagonally above the second feature, or only Indicate that first feature horizontal height is higher than second feature.Fisrt feature under the second feature " below ", " below " and " below " can be with It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.

Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model Inside it can make changes, modifications, alterations, and variations to the above described embodiments.

Claims (14)

1. a kind of floating seal for rotary machine, the rotary machine includes quiet body and rotor, the quiet body ring Around the rotor, the rotary machine has high-voltage end and low-pressure end, which is characterized in that the floating seal includes ring Shape ontology, the ring body have a first end and a second end, and the first end of the ring body is adjacent to the rotary machine High-voltage end, adjacent to the low-pressure end of the rotary machine, the inner peripheral surface of the ring body has for the second end of the ring body Groove, the groove extend from the second end of end face towards the ring body of the first end of the ring body, the ring Shape ontology is looped around between the quiet body and the rotor, and the ring body is with the quiet mates and along the annular Ontology it is radially displaceable.

2. the floating seal according to claim 1 for rotary machine, which is characterized in that the groove with it is described The end surfaces of the second end of ring body are opened.

3. the floating seal according to claim 1 for rotary machine, which is characterized in that the extension of the groove Axially inclined setting of the direction relative to the ring body.

4. the floating seal according to claim 3 for rotary machine, which is characterized in that the inclination of the groove Angle is 0 °~90 °.

5. the floating seal according to claim 1 for rotary machine, which is characterized in that the recessed institute of groove The depth for stating the inner peripheral surface of ring body is 1~50 μm.

6. the floating seal according to claim 1 for rotary machine, which is characterized in that the groove has more It is a, circumferentially-spaced arrangement of multiple grooves along the ring body.

7. the floating seal according to claim 1 for rotary machine, which is characterized in that the groove is straight line Type groove.

8. the floating seal according to claim 7 for rotary machine, which is characterized in that the groove it is transversal Face is elongated.

9. the floating seal according to claim 1 for rotary machine, which is characterized in that the groove has more A, multiple grooves are arranged along the circumferential uniform intervals of the ring body, the extending direction of each groove relative to The tilt angle of the axially inclined setting of the ring body, multiple grooves is identical and inclined direction is consistent.

10. the floating seal according to claim 1 to 9 for rotary machine, which is characterized in that institute Stating floating seal further includes the first extension and the second extension, and first extension is from the periphery of the ring body Face extends radially outwardly along the ring body, and second extension is from the outer end of first extension along the annular Ontology extends axially outward, and the inner peripheral surface of the quiet body has a card slot, the second extension cooperation in the card slot and Along the radially displaceable of the ring body in the card slot.

11. a kind of rotary machine characterized by comprising

Entry guide vane component, the entry guide vane component include guide vane and inner ring, the outer peripheral surface of the inner ring and the guide vane Piece is connected；

Rotor, the inner ring are looped around on the rotor and open with the rotor intervals；

Movable vane, the movable vane are located on the rotor, the movable vane and the guide vane phase each other in the axial direction of the rotor Pair and be spaced apart；

Floating seal, the floating seal are located between the inner ring and the rotor, and air-flow can be through the floating Sealing device enters gap between the movable vane and the guide vane to seal the gap,

Wherein the floating seal includes ring body, and the inner peripheral surface of the ring body is equipped with groove, the groove from Prolong one end of the end face of one end far from the movable vane of the ring body towards the neighbouring movable vane of the ring body It stretches, the ring body is wound around between the inner ring and the rotor, and the ring body is matched with the inner ring and edge The ring body it is radially displaceable.

12. rotary machine according to claim 11, which is characterized in that the groove has multiple, multiple grooves Circumferential uniform intervals along the ring body arrange that the extending direction of the groove inclines relative to the axial direction of the ring body Tiltedly setting, the tilt angle of the groove are 0 °~90 °, and the tilt angle of multiple grooves is identical and inclined direction is consistent.

13. rotary machine according to claim 11, which is characterized in that the inner circumferential of the recessed ring body of groove The depth in face is 1~50 μm, and the cross section of the groove is elongated.

14. rotary machine described in any one of 1-13 according to claim 1, which is characterized in that the floating seal is also Including the first extension and the second extension, first extension is from the outer peripheral surface of the ring body along the ring body Extend radially outwardly, second extension prolonging axially outward along the ring body from the outer end of first extension It stretches, the inner peripheral surface of the inner ring is equipped with card slot, and the second extension cooperation can edge in the card slot and in the card slot The ring body moves radially.