CN204610124U - The multistage sealing water device of water turbine - Google Patents
The multistage sealing water device of water turbine Download PDFInfo
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- CN204610124U CN204610124U CN201520250252.XU CN201520250252U CN204610124U CN 204610124 U CN204610124 U CN 204610124U CN 201520250252 U CN201520250252 U CN 201520250252U CN 204610124 U CN204610124 U CN 204610124U
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- sealing
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- main shaft
- seal arrangement
- multistage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Hydraulic Turbines (AREA)
Abstract
The multistage sealing water device of a kind of water turbine, comprise runner and connected main shaft, this main shaft is provided with seal arrangement, sealing device comprises the sealing seat be fixed on water-turbine top cover, is arranged on the braided packing of sealing seat interior sealing main shaft, be disposed with first, second road sealing device between described sealing seat and runner crown, this first, second road sealing device is placed in the front of seal arrangement.The utility model, by the setting of Multi-level sealing structure, makes main shaft seal performance improvement, gets rid of silt ability and strengthens, effectively reduce the wearing and tearing to main shaft and sealed member.And definitely make user obtain maximum generation benefit through multiple power stations proved.
Description
Technical field
The utility model relates to the working seal device of water power plant horizontal water turbine main shaft.
Background technique
The relatively vertical hydraulic turbine operating head of horizontal water turbine is higher, rotating speed is comparatively large, runner diameter is relatively little, cause horizontal water turbine sealing wear faster, the spindle abrasion contacted is also serious with sealing, also bring very large inconvenience to the structure repair of horizontal water turbine main shaft and rotor shaft one, this has higher requirement to sealing device of mainshaft for horizontal water turbine.
Horizontal water turbine, because producing comparatively fast water in head height runner leak stoppage inscription of loop, leaks and can enter factory building along the gap between main shaft and fixed component, cause the accident of water logging factory building time serious; Leak and go back direct-axis and enter bearing and the normal operation affecting bearing, water turbine cannot normally be run.Seal arrangement is set for this reason on hydraulic turbine main shaft with head it off.Sealing device is positioned in the middle of runner and radial-thrust bearing, and each parts of seal arrangement are vulnerable part, needs often to change.Numerous power station is high concentration of sediment power station especially; within general 1 year, at least change several times; particularly change all the more frequent flood duration, even several weeks are just changed once sometimes, and it is time-consuming and cause damage because not generating electricity between the stage of replacement to shut down its process of a period of time during replacing.
We found multiple water power plants site tests such as joint in Gansu Zhouqu County, find that the hydraulic pressure that leaks of the cavity between horizontal water turbine runner crown and sealing seat reaches about 30% of rated head, because horizontal water turbine rated head is higher, this pressure is very large to main shaft seal pressure, causes the water shutoff of main shaft seal serious wear undesirable.This pressure also add runner hydraulic thrust and then increases the load of thrust bearing shoe valve, causes very large hidden danger to the stable operation of unit.
Model utility content
The utility model provides a kind of water turbine multistage sealing water device, to solve the problem that horizontal water turbine sealing is leaked seriously, sealing wear is serious, spindle abrasion repairs inconvenience.
For solving the problem, the technological scheme that the utility model is taked is:
The multistage sealing water device of a kind of water turbine, comprise runner and connected main shaft, this main shaft is provided with seal arrangement, sealing device comprises the sealing seat be fixed on water-turbine top cover, is arranged on the braided packing of sealing seat interior sealing main shaft, be disposed with first, second road sealing device between described sealing seat and runner crown, this first, second road sealing device is placed in the front of seal arrangement.
Described first seal arrangement is comb-shaped sealing, and second seal arrangement is maze trough sealing.
Be provided with stuffing box gland in braided packing in described seal arrangement, sealing cover and external intake pipe through.
Cavity place between described sealing seat and runner crown is provided with relief tube.
The utility model, by the setting of Multi-level sealing structure, makes main shaft seal performance improvement, gets rid of silt ability and strengthens, effectively reduce the wearing and tearing to main shaft and sealed member.And definitely make user obtain maximum generation benefit through multiple power stations proved.
The all sealed members of the utility model are splitted structure, are easy to maintenance and install.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
As shown in Figure 1, the multistage sealing water device of a kind of water turbine, mainly comprises sealing seat 1, stuffing box gland 2, seal arrangement 3, pressure ring 4, stud 5, baffle ring 6, water sealing box 7, main shaft 8, waste pipe 9, intake pipe 10, relief tube 11, first, second road sealing device 14,16 etc.Sealing seat 1 bolt puts together on water-turbine top cover 15, is provided with seal ring and prevents from leaking between sealing seat 1 and top cover 15.Water sealing box 7 bolt puts together on sealing seat 1, and centre has filled one deck oil-resistant rubber slab, prevents from leaking.Baffle ring 6 puts together on main shaft 8, to guide water to get rid of from waste pipe 9.
In order to better pressure release and sand discharge, reduce the pressure to main shaft seal, the utility model is provided with first seal arrangement 14 between runner crown and sealing seat, its structure is comb-shaped sealing, outside comb reduces apart from expansion, frictional resistance repeatedly turn round in addition to increase resistance and release, to force silt and water to be got rid of from waste pipe, alleviates the pressure to main shaft seal.Be provided with second seal arrangement 16 at sealing seat 1, its structure is labyrinth slot type sealing, and leak through maze trough, define the partial fluid resistance repeatedly expanded and reduce, the increase of resistance makes decompression of leaking, thus decreases water leakage simultaneously.First, second above-mentioned road sealing device 14,16 is placed in the front of original seal arrangement 3.A small amount of teflon braided packing of leaking again in seal arrangement 3, leaks and has just substantially sealed.Decline residue is leaked and to be discharged through the waste pipe of water sealing box.A whole set of main shaft seal just reaches reasonable sealing effect.
Dry friction during for preventing from starting shooting in main shaft 8 and seal arrangement 3 between teflon braided packing, be provided with stuffing box gland 2 in teflon braided packing in seal arrangement 3, sealing cover 2 and external intake pipe 10 through and introduce clean lubrication water lubrication cooling by intake pipe 10.Pressure ring 4 is adjusted by stud 5, can control the compression degree of teflon braided packing and then control the size of water leakage by adjustment pressure ring 4.Teflon braided packing is adjacent to main shaft 8 and contacts, and constitutes the main shaft sealing device of water turbine.
In order to alleviate the pressure of main shaft seal and discharge silt, the cavity place between sealing seat 3 and runner crown 13 is provided with some relief tubes 11.After relief tube 11 gathers by pipeline draining to tail water, particularly high concentration of sediment water power plant relief tube gets final product the husky all right pressure release of spoil disposal, both alleviated the wearing and tearing of main shaft seal, and reduced the hydraulic thrust of runner and then reduce the load of thrust bearing shoe valve, guarantee had been improve to stable operation of unit.
Working procedure of the present utility model: the slit seal consumed energy that percolating water 12 forms via runner crown 13 and top cover 15, first sealing 14 again on runner crown 13 and sealing seat 1 and the stop of comb-shaped structure, major part is leaked and silt drains into tail water through relief tube 11.Remainingly leak through the second sealing 16 on sealing seat 1 that is after the further pressure release of maze trough, remaining leaking is blocked with contacting of teflon braided packing by main shaft 8, to reach sealing effect.A small amount of leaking drains into power station sump finally by waste pipe 10.
Claims (4)
1. the multistage sealing water device of water turbine, comprise runner and connected main shaft, this main shaft is provided with seal arrangement, sealing device comprises the sealing seat be fixed on water-turbine top cover, is arranged on the braided packing of sealing seat interior sealing main shaft, it is characterized in that: be disposed with first, second road sealing device (14,16) between described sealing seat (1) and runner crown, this first, second road sealing device (14,16) is placed in the front of seal arrangement (3).
2. the multistage sealing water device of a kind of water turbine according to claim 1, is characterized in that: described first seal arrangement (14) is comb-shaped sealing, and second seal arrangement (16) is maze trough sealing.
3. the multistage sealing water device of a kind of water turbine according to claim 1, is characterized in that: be provided with stuffing box gland (2) in the braided packing in described seal arrangement (3), sealing cover (2) and external intake pipe (10) through.
4. the multistage sealing water device of a kind of water turbine according to claim 1, is characterized in that: the cavity place between described sealing seat (3) and runner crown (13) is provided with relief tube (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520250252.XU CN204610124U (en) | 2015-04-23 | 2015-04-23 | The multistage sealing water device of water turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520250252.XU CN204610124U (en) | 2015-04-23 | 2015-04-23 | The multistage sealing water device of water turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204610124U true CN204610124U (en) | 2015-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201520250252.XU Active CN204610124U (en) | 2015-04-23 | 2015-04-23 | The multistage sealing water device of water turbine |
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| CN (1) | CN204610124U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847570A (en) * | 2015-04-23 | 2015-08-19 | 兰州电机股份有限公司 | Multistage water sealing device for water turbine |
| CN105927456A (en) * | 2016-07-14 | 2016-09-07 | 华北电力大学（保定） | Portable multifunctional hydroelectric power generation device |
-
2015
- 2015-04-23 CN CN201520250252.XU patent/CN204610124U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847570A (en) * | 2015-04-23 | 2015-08-19 | 兰州电机股份有限公司 | Multistage water sealing device for water turbine |
| CN105927456A (en) * | 2016-07-14 | 2016-09-07 | 华北电力大学（保定） | Portable multifunctional hydroelectric power generation device |
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