CN2540536Y - Self-regulation screw mainshaft sealing - Google Patents
Self-regulation screw mainshaft sealing Download PDFInfo
- Publication number
- CN2540536Y CN2540536Y CN 02211366 CN02211366U CN2540536Y CN 2540536 Y CN2540536 Y CN 2540536Y CN 02211366 CN02211366 CN 02211366 CN 02211366 U CN02211366 U CN 02211366U CN 2540536 Y CN2540536 Y CN 2540536Y
- Authority
- CN
- China
- Prior art keywords
- main shaft
- sealing
- water
- self
- screw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Sealing Devices (AREA)
Abstract
The utility model relates to a self-adjustment screw-type main shaft sealing device which can effectively seal the pressure water leaked from rotation wheel when main shaft rotates, to avoid turbine room being immerged. The utility model is composed of a rotation support, a fixed sealing base with screw grooves on inner wall, and a coil root made from special material with strong self-lubricant property and high abrasion resistance. When the rotation support on the main shaft rotates along with the main shaft, the space between the rotation support and the coil root in the screw groove of the fixed sealing base via screw boost force and water pressure is reduced gradually, with increased space resistance, to realize water sealing, while the water leakage is not increased along with increased water pressure.
Description
Affiliated technical field
The utility model relates to the device of main shaft seal in a kind of hydraulic generator unit.
Background technique
The main shaft seal of water turbine is the press water that upwards spills from the runner labyrinth ring when being used for the shutoff main axis rotation in the hydroelectric facility, guaranteeing turbine guide bearing and machine hole not by water logging, the safe and reliable operation of water turbine is played significant role.Structure or poor effect weak points in working life such as present all kinds of main shaft sealing constructions that use such as packing_seal, dull and stereotyped sealing, hydraulic pressure end face seal, hydrostatic seal and carbon sealing, or the high installation and maintenance difficulty of complex structure cost.A kind of volute pump formula main shaft seal that is called is newly arranged is to stop and leak by the interact eddy current that produces of the opposite helical groove that is contained in the rotation volute pump on the hydraulic turbine main shaft and is provided with on its corresponding surface through looking into, and reaches sealing effect.But only effect is better under the very little situation of very high rotating speed and main shaft throw.And actual most of rotational speed of water turbine is lower and be attended by certain throw, and this just makes volute pump formula main shaft seal can't obtain the needed eddy current of its work, thereby can't play seal action, so fail to be used widely.
Summary of the invention
In order to produce a kind of good sealing effect, wide accommodation, simple in structure, long service life, easy for installation and main shaft seal with self-regulation sealability, we start with from principle and material and make a breakthrough and carried out a large amount of designs and experiment work, design and produce this spiral main shaft seal of self-regulation that satisfies every requirement fully at last.No matter still all obtained extraordinary effect in that prototype is in service at test stand.
The technological scheme that its technical problem that solves the utility model adopts is: the spiral main shaft sealing construction of self-regulation is seen diagram, it is made up of fixing seal seat that is processed with special spiral grooves and sealing pivoted frame, places the packing with special material braiding in groove.Effect lower wall velamen at spiral lift when pivoted frame rotates screws, and makes between packing and the pivoted frame gap more and more littler, thereby reaches the water shutoff effect.Turning effort simultaneously is at random, can regulate the equilibrium relation between sealing water pressure and the water leakage automatically.For the spiral main shaft seal of self-regulation of water turbine under all kinds of different working conditions, its helical pitch, groove shape size, the packing number of turns etc. must calculate optimal parameter according to machinery and fluid mechanics, could guarantee that sealing is reliable, safe operation.
The beneficial effects of the utility model are, have excellent sealability, can reach drop and leak; Ability with automatic adjusting sealability, water leakage do not increase and the direct ratio increase with sealing load; Has extremely low friction power loss; Have very long working life, the wearing and tearing of packing can constantly be compensated after the long-time running, thereby increase its working life; Have and containing the adaptability that the big water quality of silt is used; Have simple in structure, non-maintaining and advantage such as economic performance is good.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Accompanying drawing is a structure principle chart of the present utility model, in the accompanying drawing, and 1. sealing seat, 2. sealed packing, 3. pivoted frame, 4. manger board, 5. main shaft, 6. protecting cover, 7. pressure ring, 8. top cover
Embodiment
Sealing seat (1) is fixed on the pressure ring (7) in the drawings, near the spiral grooves that processes on the circle tube inner wall of pivoted frame (3) according to the design of conditions such as head and rotating speed, studs with the packing (2) that is woven into special material at sealing seat (1) in the spiral grooves.Another vitals pivoted frame (3) of this sealing configuration is installed on the protecting cover (6), and and main shaft (5) together rotate, the pivoted frame cylinder outer wall cooperates with packing (2) and forms effectively sealing.
Claims (2)
1, a kind of sealing water device that is used on the water turbine is characterized in that being made up of fixed base (1), sealed packing (2) and the circular seal pivoted frame (3) of circle.
2, according to claim 1, it is characterized in that in the sealing seat (1) spiral groove being arranged, sealed packing (2) is housed in the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02211366 CN2540536Y (en) | 2002-02-21 | 2002-02-21 | Self-regulation screw mainshaft sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02211366 CN2540536Y (en) | 2002-02-21 | 2002-02-21 | Self-regulation screw mainshaft sealing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2540536Y true CN2540536Y (en) | 2003-03-19 |
Family
ID=33691289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02211366 Expired - Fee Related CN2540536Y (en) | 2002-02-21 | 2002-02-21 | Self-regulation screw mainshaft sealing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2540536Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103879714A (en) * | 2014-04-02 | 2014-06-25 | 芜湖市海联机械设备有限公司 | Chain conveyer |
-
2002
- 2002-02-21 CN CN 02211366 patent/CN2540536Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103879714A (en) * | 2014-04-02 | 2014-06-25 | 芜湖市海联机械设备有限公司 | Chain conveyer |
| CN103879714B (en) * | 2014-04-02 | 2016-06-22 | 芜湖市海联机械设备有限公司 | Chain-linked conveyer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |