CN1932343A - Fluid static-pressure type fingertip sealing structure - Google Patents
Fluid static-pressure type fingertip sealing structure Download PDFInfo
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- CN1932343A CN1932343A CN 200610010500 CN200610010500A CN1932343A CN 1932343 A CN1932343 A CN 1932343A CN 200610010500 CN200610010500 CN 200610010500 CN 200610010500 A CN200610010500 A CN 200610010500A CN 1932343 A CN1932343 A CN 1932343A
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- finger tip
- pressure
- ring
- static
- sealing structure
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Abstract
The present invention provides a fluid static pressure type fingertip seal structure. It includes front bushing ring, front spacing ring, high-pressure fingertip ring, low-pressure fingertip ring, rear spacing ring and rear bushing ring. The above-mentioned all rings are riveted together by a group of rivets which are uniformly distributed along the peripheral direction. On the fingertip of said low-pressure fingertip ring a static pressure shoe is set, the inner surface of said static pressure shoe is a curved surface, and said curved surface has a part of horizontal extension along axial direction, and has the central axis identical to that of rotor runway. It has good leak tightness and its structure is simple.
Description
(1) technical field
What the present invention relates to is a kind of sealing configuration, specifically utilizes the hydrostatic pressure principle to realize a kind of sealing configuration of non-contact operation between rotor and stator spare.
(2) background technique
A current large-scale gas turbine often has the gas circuit sealing that surpasses fifties places, and the quality of sealability all plays crucial effects to the efficient of motor complete machine and parts.Though contact seal has the good ability of obturaging, owing to there is contact friction, make the serious wear between friction pair, sealability is degenerated, and working life and functional reliability reduce, and also cause the part power loss.
(3) summary of the invention
The object of the invention is to provide a kind of hydrostatic pressure principle of utilizing to realize non-contact operation between rotor and stator spare, and seal performance is good, simple in structure, reliable operation, lower-cost fluid static-pressure type fingertip sealing structure.
The object of the present invention is achieved like this: it comprises preceding grommet, front split ring, high pressure finger tip ring, low pressure finger tip ring, rear split ring and back grommet, aforementioned each ring is by one group of circumferential uniform rivet, on the finger tip of low pressure finger tip ring, have the static pressure boots, the internal surface of static pressure boots is an arc surface, and there is one section level to prolong the second month in a season vertically, and identical central axis arranged with the rotor runway.
The present invention can also comprise some structure characteristics like this:
1, high pressure finger tip ring has 1-3.
2, the molded lines of finger tip line in the arc-shaped, it is on the circumference of Rg that the center of circle of each finger tip molded lines is distributed in a radius, the inner arc radius and the outer arc radius of same finger tip are respectively Rc and Rd, its center of circle is respectively C1 and C2, the central angle of C1 and C2 correspondence is 360/n, and n is circumferential finger tip number; The outer arc of adjacent two finger tips is got identical center of circle C2 with inner arc, and the week seal clearance t 1 of adjacent two-supremes pressure shoes or static pressure boots, and the normal direction clearance t Z of adjacent two finger tips are got 20% of finger tip width.
3, high pressure shoes becomes rounding with the right angle side that the static pressure boots contact with runway.
Principle of the present invention is such: before envelope under the pressure effect, when fluid-encapsulated when the seal clearance, because the internal surface of static pressure boots designs by the hydrostatic pressure principle, practical function is very little in the working pressure of static pressure boots internal surface, thereby has guaranteed the precondition of static pressure boots small deformations.
The design method that realizes action of hydrostatic pressure on the structure is: the internal surface of static pressure boots is designed to arc surface, has one section level to prolong the second month in a season vertically, and with the rotor runway identical central axis is arranged.Initial gap between static pressure boots internal surface and runway is zero or very little, and the static pressure boots are floating on the skim air film under the effect of hydrostatic pressure under the working state, thereby realizes the non-contact dynamic seal (packing).
The front and back grommet mainly plays clamping action, and back grommet is also born the axial force that produces owing to seal pressure differential except playing clamping action, and therefore, back grommet is generally thicker than preceding grommet.
The effect of front split ring is the direct friction that prevents high pressure finger tip ring and preceding grommet, also the air-flow of air inlet side is introduced the back pressure cavity of being made up of low pressure finger tip ring, rear split ring and back grommet by its radial indentation simultaneously; Rear split ring also plays the effect that forms back pressure cavity except that direct contact that prevents low pressure finger tip ring and back grommet, the existence of back pressure cavity can be alleviated the retardation phenomenon of finger tip sealing.
High pressure finger tip ring and low pressure finger tip ring are the core components that seals, and are made up of the curved beam of several finger tip shapes on it, abbreviate finger tip as, and high pressure finger tip and low pressure finger tip are arranged along asking in week to overlap.The molded lines of finger tip is designed to the circular arc line, and it is on the circumference of Rg that the center of circle of each finger tip molded lines is distributed in a radius.The inner arc radius and the outer arc radius of same finger tip are respectively Rc and Rd, and its center of circle is respectively C1 and C2, and the central angle of C1 and C2 correspondence is 360/n, and n is circumferential finger tip number; The outer arc of adjacent two finger tips is got identical center of circle C2 with inner arc, and the week seal clearance t 1 of adjacent two-supremes pressure shoes or static pressure boots, and the method river clearance t Z of adjacent two finger tips are got 20% of finger tip width.
Because the factor affecting such as distortion that rotor radial beats, thermal distortion, centrifugal load cause, in actual motion, having contact friction between static pressure boots and rotor runway is that inevitably high pressure shoes is made rounding with the right angle side that the static pressure boots contact with runway can improve diffusing radiating condition.
Advantage of the present invention is mainly reflected in: seal performance is good, simple in structure, reliable operation, cost are lower.
(4) description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is sealing principle figure of the present invention;
Fig. 3 is the partial enlarged drawing of Fig. 2;
Fig. 4 is that the A of Fig. 3 is to view;
Fig. 5 is that the B of Fig. 4 is to view;
Fig. 6 is the structural representation of preceding grommet;
Fig. 7 is the A-A sectional view of Fig. 6;
Fig. 8 is the structural representation of front split ring;
Fig. 9 is the A-A sectional view of Fig. 8;
Figure 10 is the bad structural representation of high pressure finger tip;
Figure 11 is the A-A sectional view of Figure 10;
Figure 12 is the bad structural representation of low pressure finger tip;
Figure 13 is the A-A sectional view of Figure 12;
Figure 14 is the structural representation of rear split ring;
Figure 15 is the A-A sectional view of Figure 14;
Figure 16 is the B-B sectional view of Figure 14;
Figure 17 is the structural representation of back grommet;
Figure 18 is the A-A sectional view of Figure 17;
Figure 19 is the schematic representation of rotor runway.
(5) embodiment
For a more detailed description to the present invention for example below in conjunction with accompanying drawing:
In conjunction with Fig. 1, the composition of fluid static-pressure type fingertip sealing structure comprises preceding grommet 1, front split ring 2, high pressure finger tip ring 3, low pressure finger tip ring 4, rear split ring 5 and back grommet 6, aforementioned each ring is by one group of circumferentially uniform rivet 7 riveted joint, on the finger tip of low pressure finger tip ring, have the static pressure boots, the internal surface of static pressure boots is an arc surface, and there is one section level to prolong the second month in a season vertically, and identical central axis arranged with the rotor runway.High pressure finger tip ring has 1-3.Simultaneously in conjunction with Fig. 2-5, the molded lines of finger tip line in the arc-shaped, it is on the circumference of Rg that the center of circle of each finger tip molded lines is distributed in a radius, the inner arc radius and the outer arc radius of same finger tip are respectively Rc and Rd, its center of circle is respectively C1 and C2, the central angle of C1 and C2 correspondence is 360/n, and n is circumferential finger tip number; The outer arc of adjacent two finger tips is got identical center of circle C2 with inner arc, and the week seal clearance t 1 of adjacent two-supremes pressure shoes or static pressure boots, and the normal direction clearance t Z of adjacent two finger tips are got 20% of finger tip width.High pressure shoes becomes rounding with the right angle side that the static pressure boots contact with runway.
Preceding grommet, front split ring, high pressure finger tip ring, low pressure finger tip ring, rear split ring and backsight are bad, become a composite structure by circumferential all rivets in city.For guaranteeing the manufacturability of processing and assembling, rivet hole and vent are made five one group, along 16 groups of circumferential arrangement.In five holes of every group, have one to be rivet hole, one is auxiliary hole, and three is vent in addition.During assembling, to the angle of a counter clockwise direction and a rivet hole correspondence of clockwise direction rotation, realize high pressure finger tip not at the same level by respectively, and the folded array of high pressure finger tip and low pressure finger tip.Finger tip seal ring after riveting tightly makes the internal surface that finger tip solidifies the finger tip boots carry out grinding with jar wax or other method, and reaches and the desired fit dimension of rotor runway.
Claims (5)
1, a kind of fluid static-pressure type fingertip sealing structure, it comprises preceding grommet, front split ring, high pressure finger tip ring, low pressure finger tip ring, rear split ring and back grommet, aforementioned each ring is by one group of circumferential uniform rivet, it is characterized in that: on the finger tip of low pressure finger tip ring, have the static pressure boots, the internal surface of static pressure boots is an arc surface, and one section horizontal-extending is arranged vertically, and identical central axis is arranged with the rotor runway.
2, fluid static-pressure type fingertip sealing structure according to claim 1 is characterized in that: high pressure finger tip ring has 1-3.
3, fluid static-pressure type fingertip sealing structure according to claim 1 and 2, it is characterized in that: the molded lines of finger tip line in the arc-shaped, it is on the circumference of Rg that the center of circle of each finger tip molded lines is distributed in a radius, the inner arc radius and the outer arc radius of same finger tip are respectively Rc and Rd, its center of circle is respectively C1 and C2, the central angle of C1 and C2 correspondence is 360/n, and n is circumferential finger tip number; The outer arc of adjacent two finger tips is got identical center of circle C2 with inner arc, and the week seal clearance t 1 of adjacent two-supremes pressure shoes or static pressure boots, and the normal direction clearance t Z of adjacent two finger tips are got 20% of finger tip width.
4, fluid static-pressure type fingertip sealing structure according to claim 1 and 2 is characterized in that: high pressure shoes becomes rounding with the right angle side that the static pressure boots contact with runway.
5, fluid static-pressure type fingertip sealing structure according to claim 3 is characterized in that: high pressure shoes becomes rounding with the right angle side that the static pressure boots contact with runway.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610010500 CN1932343A (en) | 2006-09-06 | 2006-09-06 | Fluid static-pressure type fingertip sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610010500 CN1932343A (en) | 2006-09-06 | 2006-09-06 | Fluid static-pressure type fingertip sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1932343A true CN1932343A (en) | 2007-03-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610010500 Pending CN1932343A (en) | 2006-09-06 | 2006-09-06 | Fluid static-pressure type fingertip sealing structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN1932343A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102418568A (en) * | 2011-12-31 | 2012-04-18 | 中国燃气涡轮研究院 | Fingertip sealing device |
| CN105545375A (en) * | 2015-12-14 | 2016-05-04 | 中国燃气涡轮研究院 | Double-beam finger seal device |
| CN107366557A (en) * | 2017-08-15 | 2017-11-21 | 沈阳航空航天大学 | A kind of low leakage fingertip sealing structure for increasing seal shoe lift |
| CN110195617A (en) * | 2019-07-19 | 2019-09-03 | 中国航发沈阳发动机研究所 | A kind of finger sealing device |
-
2006
- 2006-09-06 CN CN 200610010500 patent/CN1932343A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102418568A (en) * | 2011-12-31 | 2012-04-18 | 中国燃气涡轮研究院 | Fingertip sealing device |
| CN102418568B (en) * | 2011-12-31 | 2014-10-22 | 中国燃气涡轮研究院 | fingertip sealing device |
| CN105545375A (en) * | 2015-12-14 | 2016-05-04 | 中国燃气涡轮研究院 | Double-beam finger seal device |
| CN105545375B (en) * | 2015-12-14 | 2017-03-08 | 中国燃气涡轮研究院 | Twin beams finger sealing device |
| CN107366557A (en) * | 2017-08-15 | 2017-11-21 | 沈阳航空航天大学 | A kind of low leakage fingertip sealing structure for increasing seal shoe lift |
| CN107366557B (en) * | 2017-08-15 | 2023-05-12 | 沈阳航空航天大学 | Low-leakage fingertip sealing structure capable of increasing lifting force of sealing boot |
| CN110195617A (en) * | 2019-07-19 | 2019-09-03 | 中国航发沈阳发动机研究所 | A kind of finger sealing device |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |