CN201973243U - Radial annular mixing sealing - Google Patents
Radial annular mixing sealing Download PDFInfo
- Publication number
- CN201973243U CN201973243U CN2011201031776U CN201120103177U CN201973243U CN 201973243 U CN201973243 U CN 201973243U CN 2011201031776 U CN2011201031776 U CN 2011201031776U CN 201120103177 U CN201120103177 U CN 201120103177U CN 201973243 U CN201973243 U CN 201973243U
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- sealing
- regulator plate
- honeycomb
- rotor
- pressure chamber
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- Sealing Devices (AREA)
Abstract
The utility model discloses a radial annular mixing sealing which comprises a rotor and a sealing sleeve sheathed on the rotor; a pressure chamber air venting hole and a pressure chamber air inlet hole are arranged on the sealing sleeve; an adjusting plate and a bellow joint is arranged in the sealing sleeve; one end of the below joint is fixed on the sealing sleeve; the other end of the bellow joint is connected with the adjusting plate; a pressure chamber is formed between the adjusting plate and the sealing sleeve; the radial annular mixing sealing is characterized in that a honeycomb sealing disc is arranged on the rotor; the honeycomb sealing disc is arranged in the middle of the adjusting plate; and a sealing chamber is formed between the adjusting plate and the honeycomb sealing disc. The radial annular mixing sealing changes the axial flow of gas into the radial flow and eliminates the axial spiral flow; as the honeycomb sealing disc is arranged, compared with the common sealing, the leakage rate of the radial annular mixing sealing is greatly improved; the sealing clearance has very good self-adaptive adjusting capability; the service life of the sealing is longer; the air flow exciting force in the sealing obviously decreases and the shock excitation problem of the gas flow is greatly improved.
Description
Technical field
The utility model relates to a kind of seal style that is applied in the rotating machinery, relates in particular to a kind of radial ringed hybrid sealing that is used for rotating machinery.
Background technique
At present, reducing the seal leakage amount and improving the sealing wear resistance is the focus that people pay close attention to always, these 2 statistics (synergy) that can regard sealing as.In recent years, sealed motive force characteristic (vibration damping) has obtained increasing the attention both at home and abroad.This is because along with the raising of running parameter, the sealing excitation force that inner fluid produced is increasing, and is also increasing to the harm that unit safety operation brought.People dredge in tradition on the basis of tooth sealing for this reason, have proposed novel seal patterns such as honeycomb, brush, derotation stream, damping, spiral chute, ladder, mixing by the structure that changes sealing itself, have obtained certain effect.But the sealing configuration pattern becomes increasingly complex, and the contradiction between leakage rate and the wear resistance does not obtain fine solution.In order to solve the contradiction between sealing wear resistance and the leakage rate, the nineties in last century, the U.S. proposes adjustable seal concept, and its main thought is to introduce one gas to flow to the sealing back, changes dynamic and static gaps by changing gas pressure.Nineteen ninety, U.S. GE company has researched and developed positive seal, manually controls the folding of sealing block by introducing high pressure steam.Nineteen ninety-five, Toshiba Corp has proposed to adopt the adjustable sealing of pressure ripple management and control system.In recent years, the somebody proposed various seal clearances and adjusted controlling method.Above-mentioned sealing can unify to regard " axial seal " as,, all belongs to " axial seal " in essence though mechanism is incomplete same, promptly along the rotor axis direction arrange some groups (to) sealing, reach sealing effect by decompression step by step.For " axial seal ", mainly there is following problem: (1) helical flow, under the acting in conjunction of fluid leakage flow and rotor high-speed rotation vertically, inevitably the helical flow phenomenon can appear in the Seal cage, this present just confessed Airflow Exciting-Vibration Force main source; (2) prewhirl the influence of convection cell excitation force greatly, prewhirling can appear in mechanical rotary seal inlet, prewhirls and can strengthen the helical flow phenomenon, thereby produce bigger Airflow Exciting-Vibration Force; (3) there is contradiction between leakage rate and the wear resistance; (4) the seal clearance self adaption is adjusted difficulty, axial arranged sealing, and the gap adjustment need be carried out on circumferentially, requires sealing block " expansion " and " contraction " freely, and this has brought very big difficulty for the adjustment of seal clearance self adaption.Practice shows that sealing bite fault appears in this class sealing especially easily.Because the existence of above problem, the flow-induced vibration problem can not be solved at all.
The model utility content
Technical problem to be solved in the utility model is at above-mentioned the deficiencies in the prior art, and proposes a kind of radial ringed hybrid sealing of eliminating flow-induced vibration.
The technological scheme that its technical problem that solves the utility model adopts is:
A kind of radial ringed hybrid sealing, comprise: rotor and be set in epitrochanterian stuffing box gland, on stuffing box gland, be provided with pressure chamber exhaust port and pressure chamber inlet hole, in described stuffing box gland, be provided with regulator plate and ripple joint, one end of described ripple joint is fixed on the stuffing box gland, the other end of ripple joint is connected with described regulator plate, formed pressure chamber between regulator plate and the stuffing box gland, it is characterized in that, described rotor is provided with the honeycomb seal dish, this honeycomb seal dish is positioned in the middle of the described regulator plate, has formed Seal cage between regulator plate and the honeycomb seal dish.
Between described stuffing box gland and regulator plate, also be provided with supported spring.
On regulator plate, be provided with the ring packing tooth, and this ring packing tooth is provided with acceleration transducer between honeycomb seal dish and regulator plate on regulator plate.
The beneficial effect of the radial ringed hybrid sealing that compared with prior art, the utility model proposes is as follows:
(1) simple in structure, any fixed sealing all can be changed into corresponding radial ringed hybrid sealing in view of the above;
(2) except the existing energy dissipation mechanism of conventional seals, be provided with the honeycomb seal dish, can form a plurality of whirlpools in this process, energy dissipation is big, and it is obvious that turbulent flow increases the resistance effect, and the also therefore and conventional sealing of leakage rate is little.By numerical simulation calculation result in early stage, radial ringed hybrid sealing reduces leakage rate 30%～50% than traditional labyrinth seal.
(3) seal clearance is easy to adjust, avoid impact and rub, by being arranged on acceleration transducer on the regulator plate and the intake and exhaust pressure regulating hole on the stuffing box gland, can monitor tribological failure, and can adjust gap between regulator plate and the honeycomb seal dish easily by changing pressure in the pressure chamber, dynamic and static gaps can reach optimum.
(4) because the existence of honeycomb seal dish, flow spiral shape is flowed and is cut off in the sealing, and the sealing gap direction is perpendicular to main direction of vibration, and insensitive to the radially sound off-centre of axle, the flow-induced vibration problem is greatly improved, near eliminating.
Description of drawings
Fig. 1 is radial ringed hybrid sealed structure chart;
Fig. 2 is radial ringed hybrid sealing schematic representation;
Fig. 3 is that radial ringed hybrid sealing Airflow Exciting-Vibration Force is analyzed schematic representation;
Among the figure, the 1st, airflow inlet, the 2nd, radial ring seal tooth, the 3rd, acceleration transducer, the 4th, supported spring, the 5th, regulator plate, the 6th, axial seal tooth, the 7th, Seal cage, the 8th, ripple joint, the 9th, pressure chamber, the 10th, honeycomb seal dish, the 11st, flow outlet, the 12nd, rotor, the 13rd, stuffing box gland, the 14th, pressure chamber exhaust port, the 15th, pressure chamber inlet hole.
Embodiment
A kind of radial ringed hybrid sealing, comprise: rotor 12 and be set in stuffing box gland 13 on the rotor 12, in stuffing box gland 13, be provided with regulator plate 5, regulator plate 5 links to each other with stuffing box gland 13 with supported spring 4 by the ripples joint 8 that is installed in the stuffing box gland 13, formed pressure chamber 9 between regulator plate 5 and the stuffing box gland 13, regulator plate 5 and be installed between the honeycomb seal dish 10 on the rotor 12 and formed Seal cage 7, be provided with ring packing tooth 2 and ring packing tooth 2 on the regulator plate 5 between honeycomb seal dish 10 and regulator plate 5, on regulator plate 5, be provided with acceleration transducer 3, on stuffing box gland 13, be provided with pressure chamber exhaust port 14 and pressure chamber inlet hole 15.
Shown in Figure 1, in rotating shaft, designed the honeycomb seal dish, honeycomb hole promptly is set on card.Respectively there is a regulator plate seal disc both sides, the ring packing that the array diameter does not wait has been installed on the regulator plate, gap between ring packing and the honeycomb seal dish can be regulated by regulating pressure in pressure cavity easily, and judge whether to bump mill by the acceleration transducer that is located on the regulator plate, if friction phenomenon occurs, then can reduce pressure chamber pressure by regulating pressure chamber inlet hole aperture, increase the gap, avoid friction, it is optimum that dynamic and static gaps can reach.Radially the ring packing tooth of Bu Zhiing and honeycomb seal dish are combined to form mixes the leakage rate that sealing can effectively reduce sealing in the rotating machinery (as steam turbine, compressor etc.), and can significantly improve the anti-flow-induced vibration ability of sealing, reaches the synergy effectiveness in vibration suppression.
As shown in Figure 3, under the honeycomb seal dish intercepted, gas mainly radially flowed in the novel sealing, is hindered by the honeycomb seal dish in the flow leakage process, and form a large amount of whirlpools in honeycomb, had increased dissipation effect, and had avoided air-flow helical flow phenomenon vertically.Rotor oscillation direction (x direction and y direction) is vertical with seal clearance adjustment direction (z direction), therefore rotor oscillation and eccentric very little to the sealability influence, the Seal cage internal pressure to the rotor effect mainly vertically, seal disc both sides gas flow direction is opposite, two sidewind power can partial offset, therefore, Airflow Exciting-Vibration Force can be very little, and the main cause that Airflow Exciting-Vibration Force produces is eliminated.
Claims (3)
1. radial ringed hybrid sealing, comprise: rotor (12) and be set in stuffing box gland (13) on the rotor (12), on stuffing box gland (13), be provided with pressure chamber exhaust port (14) and pressure chamber inlet hole (15), in described stuffing box gland (13), be provided with regulator plate (5) and ripple joint (8), one end of described ripple joint (8) is fixed on the stuffing box gland, the other end of ripple joint (8) is connected with described regulator plate (5), formed pressure chamber (9) between regulator plate (5) and the stuffing box gland (13), it is characterized in that, described rotor (12) is provided with honeycomb seal dish (10), this honeycomb seal dish (10) is positioned in the middle of the described regulator plate (5), has formed Seal cage (7) between regulator plate (5) and the honeycomb seal dish (10).
2. the hybrid sealing of annular according to claim 1 is characterized in that: also be provided with supported spring (4) between described stuffing box gland and regulator plate (5).
3. the hybrid sealing of annular according to claim 1, it is characterized in that: on regulator plate (5), be provided with ring packing tooth (2), and this ring packing tooth (2) is positioned between honeycomb seal dish (10) and the regulator plate (5), is provided with acceleration transducer (3) on regulator plate (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201031776U CN201973243U (en) | 2011-04-11 | 2011-04-11 | Radial annular mixing sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201031776U CN201973243U (en) | 2011-04-11 | 2011-04-11 | Radial annular mixing sealing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201973243U true CN201973243U (en) | 2011-09-14 |
Family
ID=44578346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201031776U Expired - Fee Related CN201973243U (en) | 2011-04-11 | 2011-04-11 | Radial annular mixing sealing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201973243U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102207198A (en) * | 2011-04-11 | 2011-10-05 | 东南大学 | Radial annular mixed seal |
-
2011
- 2011-04-11 CN CN2011201031776U patent/CN201973243U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102207198A (en) * | 2011-04-11 | 2011-10-05 | 东南大学 | Radial annular mixed seal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20130411 |