CN105333148A - Flexible seal-rotor system shallow-groove-face sleeve capable of increasing lift force - Google Patents
Flexible seal-rotor system shallow-groove-face sleeve capable of increasing lift force Download PDFInfo
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- CN105333148A CN105333148A CN201510835195.6A CN201510835195A CN105333148A CN 105333148 A CN105333148 A CN 105333148A CN 201510835195 A CN201510835195 A CN 201510835195A CN 105333148 A CN105333148 A CN 105333148A
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- shallow slot
- sleeve
- rotor
- shallow
- face
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention provides a flexible seal-rotor system shallow-groove-face sleeve capable of increasing lift force. The flexible seal-rotor system shallow-groove-face sleeve comprises a sleeve body, T-shaped buckles are distributed on the inner side of the sleeve, and shallow grooves are evenly formed in the outer surface of the sleeve. The shallow grooves in the outer surface of the sleeve comprise the spherical shallow grooves and the honeycomb-face shallow grooves. The sleeve is clamped on a rotor through the T-shaped buckles and rotates at a high speed along with the rotor. For a flexible seal, the unique shallow groove face structure can reduce axial leakage and also can increase the gas lift force at the seal lower end face. By means of the flexible seal-rotor system shallow-groove-face sleeve capable of increasing the lift force, the technical problem of the lifting hysteretic nature of the lower end face of the flexible seal (fingertip seal) is solved, and the self-adapting capacity of the flexible seal is improved, so that a better seal effect is achieved.
Description
Technical field
The present invention relates to a kind of sleeve, particularly relate to a kind of flexible sealing-rotor-support-foundation system shallow slot surface sleeve improving lift, be applied to turbomachine rotor axial flexible sealing.
Background technique
Because modern rotor seal develops to high rotating speed, the purpose of design of Sealing trends towards the leakage rate significantly reduced in seal path.For rotor dynamic seal (packing), while stoping leakage, the wearing and tearing reduced between rotor and sealing are leaked more important than simple reduction.
A large amount of numerical calculation and test prove: the rotor of high speed rotating can produce obvious eccentric whirling motion, make it easily to touch with sealing to rub, and so namely injure rotor and increase sealing original interstice, reducing sealability.The flexible sealing (as Finger seal) with adaptive ability can address this problem to a certain extent.But because flexible sealing has certain deferred reaction to touching of rotor, need to lean on the lift of gas leakage to reduce the time of delay.Therefore not obvious affect the prerequisite of leakage rate under the lift of gas of raising flexible sealing as much as possible very important to whole rotor-seal system.
Summary of the invention
The object of the invention is to improve the lift to sealing lower end surface of gas in sealing channel.Ensure the promptness that flexible sealing lower end surface is lifted and improve adaptive ability and a kind of flexible sealing-rotor-support-foundation system shallow slot surface sleeve improving lift is provided.
The object of the present invention is achieved like this: the internal surface of sleeve is provided with on T-shaped buckle, outer surface and is provided with shallow slot, and shallow slot symmetrically be covered with whole outer surface, sleeve is installed on rotor by T-shaped buckle, sleeve is outside equipped with Sealing, the outer surface of Sealing and sleeve and on shallow slot form seal clearance.
The present invention also comprises some structure characteristics like this:
1. T-shaped buckle described in has 3-6, and evenly arranges along the circumference of sleeve interior surface.
2. shallow slot described in is spherical shallow slot, and the spacing between spherical shallow slot and spherical shallow slot is 0.2-1mm.
3. described in, the radius of spherical shallow slot is 0.5-3mm, and the degree of depth of spherical shallow slot is 0.02-0.2mm.
4. shallow slot described in is honeycomb face shallow slot, and the spacing between honeycomb face shallow slot and honeycomb face shallow slot is 0.2-1mm.
5. described in, the hexagonal external radius of a circle of honeycomb face shallow slot is 0.5-3mm, and the degree of depth of honeycomb face shallow slot is 0.02-0.2mm.
Compared with prior art, the invention has the beneficial effects as follows: the present invention effectively can improve the lift of gas of sealing suffered by lower end surface, strengthens the self adaption effect of flexible sealing.By being arranged on epitrochanterian nested arrangement, the lift to sealing lower end surface of gas in sealing channel can be improved.The present invention ensures the promptness that flexible sealing lower end surface is lifted and improves adaptive ability.The application of sleeve turn avoid simultaneously directly carries out processing and the loss that likely brings on the rotor involved great expense, and replace convenient.The alternative traditional soldering of groove structure of sleeve outer surface of the present invention reduces leakage rate in the structure of epitrochanterian height sealing tooth.Also namely, for flexible sealing, the shallow slot face structure of uniqueness of the present invention not only can reduce axial leakage, also improves the lift of gas of its sealing lower end surface.Solve this technical barrier of hysteresis quality lifted flexible sealing (Finger seal) lower end surface, improve the adaptive ability of flexible sealing to reach better sealing effect.
Accompanying drawing explanation
Fig. 1 is the main apparent direction schematic diagram of rotor sleeve structural member of the present invention;
Fig. 2 is the side view of sphere shallow slot surface collet structure of the present invention;
Fig. 3 is honeycomb face of the present invention shallow slot surface collet structure side view;
Fig. 4 is sphere shallow slot tube-in-tube structure A-A cross-sectional view of the present invention and scale diagrams, wherein D
bfor outer surface circular diameter, H
bfor the shallow slot degree of depth;
Fig. 5 is honeycomb face of the present invention shallow slot tube-in-tube structure A-A cross-sectional view and scale diagrams, wherein D
hfor Hexagon external diameter, H
hfor the honeycomb shallow slot degree of depth;
Fig. 6 is the compound mode of sleeve of the present invention and rotor-seal system.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Composition graphs 1, the technical solution adopted in the present invention is: by designing a kind of sleeve means being nested in rotor surface, the special construction in the shallow slot face that sleeve outer surface is evenly distributed increases the lift of gas of gas leakage, this lift makes the timely lifting in lower end of flexible sealing (Finger seal), improves the adaptivity of flexible sealing.The composition of seal-rotor system shallow slot surface sleeve comprises annulus sleeve 1, T-shaped buckle 2 and outer surface shallow slot 3.Sleeve can be integral installation, also can be assembled by 2-6 eccentric circular ring as required.Wherein T-shaped buckle is used for being installed between sleeve and rotating shaft, is formed in one, turnery processing between buckle and sleeve.And the edge of buckle and rotor contact processes certain chamfering.
Composition graphs 2 to Fig. 5, the present invention proposes the shallow slot structure of two kinds of forms, and one is spherical shallow slot, another is honeycomb face shallow slot.Sphere shallow slot surface collet structure and honeycomb face shallow slot surface collet structure side view shows are in Fig. 2 Fig. 3.Wherein spherical shallow slot directly carries out grinding for using spheric grinding machine at sleeve outer surface, and honeycomb face groove adopts thin plate to complete in sleeve outer surface soldering.The diameter D of sphere shallow slot
bfor 0.5-3mm; The depth H of sphere shallow slot
bfor 0.02-0.2mm.The hexahedron circumscribed circle diameter D of honeycombed shallow slot
hfor 0.5-3mm; The depth H of honeycombed shallow slot
hfor 0.02-0.2mm.Distance on sleeve between adjacent grooves is 0.2-1mm.
Composition graphs 6, the compound mode of middle sleeve of the present invention and rotor-seal system is: shaft sleeve 1 is installed on rotor 6 by T-shaped buckle 2, be covered with in figure the sleeve outer surface of shallow slot 3 and between Sealing 5 dash area be seal clearance 4.
Principle of the present invention is such: sleeve can do high speed rotating with rotor after being installed on and rotor being fixed.While there is relative movement in sleeve outer surface and sealing lower end surface, the shallow grooves being positioned at outer surface can increase leak fluid component velocity along the circumferential direction, forces fluid to move in the circumferential direction, reduce axial flow velocity, improves the lift effect of flexible sealing while reducing leakage rate.Reduce flexible sealing lower end by lift lift the time of delay and increase the adaptive ability of flexible sealing.
Main body of the present invention is the sleeve that an outer surface processing is covered with shallow slot; The internal surface of sleeve is smooth surface and in inner ring, is provided with T-shaped buckle, can be installed on rotor and do high speed rotary motion with rotor.Outer surface is the non-smooth surface being uniformly distributed full circle or honeycombed groove.Wherein ensure inner and outer surface all with rotor and to seal lower end surface concentric.The application of sleeve turn avoid simultaneously directly carries out processing and the loss that likely brings on the rotor involved great expense, and replace convenient.The alternative traditional soldering of groove structure of sleeve outer surface reduces leakage rate in the structure of epitrochanterian height sealing tooth.Described seal-rotor system shallow slot surface sleeve structure, its bush material is 1Cr18Ni9Ti.
The present invention can also comprise some structure characteristics like this:
The radius of sphere shallow slot or the hexahedron circumradius of honeycombed shallow slot are 0.5-3mm.
The radius of sphere shallow slot or the degree of depth of honeycombed shallow slot are 0.02-0.2mm.
The internal surface of sleeve has quantity to be the T-shaped buckle of 3-6, is evenly distributed on circumferencial direction.
Distance on sleeve between adjacent shallow slot is 0.2-1mm.
Sleeve can be integral installation, also can be assembled by 2-6 eccentric circular ring as required.
The invention discloses a kind of flexible sealing-rotor-support-foundation system shallow slot surface sleeve device improving lift.This structure comprises sleeve body, and sleeve disposed inboard has T-shaped buckle, and shallow slot is arranged in sleeve outer surface equably.On the sleeve outer surface invented in literary composition, shallow slot form has two kinds, and one is sphere shallow slot, and another kind is honeycomb face shallow slot.This sleeve means to be installed on rotor by T-shaped buckle and to rotate with rotor high-speed.For flexible sealing, unique shallow slot face structure not only can reduce axial leakage, also improves the lift of gas of its sealing lower end surface.Solve this technical barrier of hysteresis quality lifted flexible sealing (Finger seal) lower end surface, improve the adaptive ability of flexible sealing to reach better sealing effect.
The present invention includes: sleeve, be nested in rotor outer surface device and Sealing top close to and form seal clearance; Be embedded in the T-shaped buckle of sleeve interior surface, sleeve is installed by itself and rotor; Sleeve outer surface shallow slot, forms the new outer surface of sleeve rotor entirety and forms seal clearance with Sealing.At the outer surface uniform shallow slot with circumferencial direction vertically of sleeve, internal surface has been uniformly distributed circumferentially T-shaped buckle, and inner and outer surface has identical central axis.
The internal surface of sleeve has quantity to be the T-shaped buckle of 3-6, and sleeve outer surface shallow slot structure can be sphere or honeycombed.
The radius of sphere shallow slot or the hexahedron circumradius of honeycombed shallow slot are 0.5-3mm, and the radius of sphere shallow slot or the degree of depth of honeycombed shallow slot are 0.02-0.2mm, and the distance on sleeve between adjacent grooves is 0.2-1mm.
T-shaped snap beads becomes certain chamfering.
Claims (6)
1. one kind can be improved the flexible sealing-rotor-support-foundation system shallow slot surface sleeve of lift, it is characterized in that: the internal surface of sleeve is provided with on T-shaped buckle, outer surface and is provided with shallow slot, and shallow slot symmetrically be covered with whole outer surface, sleeve is installed on rotor by T-shaped buckle, sleeve is outside equipped with Sealing, the outer surface of Sealing and sleeve and on shallow slot form seal clearance.
2. a kind of flexible sealing-rotor-support-foundation system shallow slot surface sleeve improving lift according to claim 1, is characterized in that: described T-shaped buckle has 3-6, and evenly arranges along the circumference of sleeve interior surface.
3. a kind of flexible sealing-rotor-support-foundation system shallow slot surface sleeve improving lift according to claim 1 and 2, is characterized in that: described shallow slot is spherical shallow slot, and the spacing between spherical shallow slot and spherical shallow slot is 0.2-1mm.
4. a kind of flexible sealing-rotor-support-foundation system shallow slot surface sleeve improving lift according to claim 3, it is characterized in that: the radius of described spherical shallow slot is 0.5-3mm, the degree of depth of spherical shallow slot is 0.02-0.2mm.
5. a kind of flexible sealing-rotor-support-foundation system shallow slot surface sleeve improving lift according to claim 1 and 2, is characterized in that: described shallow slot is honeycomb face shallow slot, and the spacing between honeycomb face shallow slot and honeycomb face shallow slot is 0.2-1mm.
6. a kind of flexible sealing-rotor-support-foundation system shallow slot surface sleeve improving lift according to claim 5, is characterized in that: the hexagonal external radius of a circle of described honeycomb face shallow slot is 0.5-3mm, and the degree of depth of honeycomb face shallow slot is 0.02-0.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510835195.6A CN105333148B (en) | 2015-11-26 | 2015-11-26 | A kind of flexible sealing rotor-support-foundation system shallow slot surface sleeve for improving lift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510835195.6A CN105333148B (en) | 2015-11-26 | 2015-11-26 | A kind of flexible sealing rotor-support-foundation system shallow slot surface sleeve for improving lift |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105333148A true CN105333148A (en) | 2016-02-17 |
| CN105333148B CN105333148B (en) | 2017-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510835195.6A Active CN105333148B (en) | 2015-11-26 | 2015-11-26 | A kind of flexible sealing rotor-support-foundation system shallow slot surface sleeve for improving lift |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4218066A (en) * | 1976-03-23 | 1980-08-19 | United Technologies Corporation | Rotary seal |
| SU1707376A1 (en) * | 1989-12-11 | 1992-01-23 | Ю.И.Кондрунин | Honeycomb packing of rotating shaft |
| CN2173885Y (en) * | 1993-12-09 | 1994-08-10 | 丹东市波纹管机械密封厂 | Shutdown spiral sealing for heavy oil machinery or pump |
| CN2708047Y (en) * | 2004-07-14 | 2005-07-06 | 侯顺利 | Cone shaped spiral sealing device |
| CN201281038Y (en) * | 2008-10-27 | 2009-07-29 | 湖北双环科技股份有限公司 | Hermetic sealing body of chill air compressor |
| CN103486074A (en) * | 2013-08-26 | 2014-01-01 | 神华集团有限责任公司 | Seal cartridge assembly for driving end of centrifugal pump and centrifugal pump |
| CN203571042U (en) * | 2013-11-07 | 2014-04-30 | 沈阳北碳密封有限公司 | Abradable coating honeycomb seal |
| CN205207675U (en) * | 2015-11-26 | 2016-05-04 | 哈尔滨工程大学 | Can improve flexible sealing - rotor system shallow slot face sleeve of lift |
-
2015
- 2015-11-26 CN CN201510835195.6A patent/CN105333148B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4218066A (en) * | 1976-03-23 | 1980-08-19 | United Technologies Corporation | Rotary seal |
| SU1707376A1 (en) * | 1989-12-11 | 1992-01-23 | Ю.И.Кондрунин | Honeycomb packing of rotating shaft |
| CN2173885Y (en) * | 1993-12-09 | 1994-08-10 | 丹东市波纹管机械密封厂 | Shutdown spiral sealing for heavy oil machinery or pump |
| CN2708047Y (en) * | 2004-07-14 | 2005-07-06 | 侯顺利 | Cone shaped spiral sealing device |
| CN201281038Y (en) * | 2008-10-27 | 2009-07-29 | 湖北双环科技股份有限公司 | Hermetic sealing body of chill air compressor |
| CN103486074A (en) * | 2013-08-26 | 2014-01-01 | 神华集团有限责任公司 | Seal cartridge assembly for driving end of centrifugal pump and centrifugal pump |
| CN203571042U (en) * | 2013-11-07 | 2014-04-30 | 沈阳北碳密封有限公司 | Abradable coating honeycomb seal |
| CN205207675U (en) * | 2015-11-26 | 2016-05-04 | 哈尔滨工程大学 | Can improve flexible sealing - rotor system shallow slot face sleeve of lift |
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| Publication number | Publication date |
|---|---|
| CN105333148B (en) | 2017-10-03 |
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