CN201874723U - Main shaft-sealing structure for hydroturbines - Google Patents
Main shaft-sealing structure for hydroturbines Download PDFInfo
- Publication number
- CN201874723U CN201874723U CN2010206054498U CN201020605449U CN201874723U CN 201874723 U CN201874723 U CN 201874723U CN 2010206054498 U CN2010206054498 U CN 2010206054498U CN 201020605449 U CN201020605449 U CN 201020605449U CN 201874723 U CN201874723 U CN 201874723U
- Authority
- CN
- China
- Prior art keywords
- main shaft
- water shutoff
- sealing
- box
- seal
- 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
Links
Images
Classifications
-
- 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
Landscapes
- Sealing Devices (AREA)
- Hydraulic Turbines (AREA)
Abstract
The utility model relates to a main shaft-sealing structure for hydroturbines, which comprises a watertight box, a main shaft-sealing sleeve, a watertight gland and a drain pipe, the main shaft-sealing sleeve is sleeved on a main shaft, the watertight box is of a halved structure, and is fixed on the main body of a hydroturbine and mounted on the main shaft-sealing sleeve, the drain pipe is mounted on the lower end of the watertight box, and a comb structure for sealing is adopted between the main shaft-sealing sleeve and the watertight box. The main shaft-sealing structure mainly comprises the main shaft-sealing sleeve with outer teeth and the watertight box with inner teeth coupled with a drain hole, packing seal and other structures, the structure is simple, the friction can be reduced, and a good sealing effect can be achieved.
Description
Technical field
The utility model relates to a kind of hydraulic turbine main shaft sealing structure.
Background technique
At present, the main shaft seal of water turbine mainly contains following several mode: 1. and this is a kind of simple in structure, utilization main shaft seal mode the most widely for the packing main shaft seal, and it mainly is made up of packing box, asbestos packing and pressure ring.It is after earlier asbestos packing being soaked into paraffin, will to coat carbon dust on the asbestos packing again, asbestos packing is cut into several sections then and is packed in the packing box, after filling 3-4 circles, compresses with pressure ring at last.Can seal main shaft though do like this, the shortcoming of its maximum is exactly that asbestos packing has carried out directly contacting with main shaft, and main shaft is easy to wearing and tearing when rotating, and it is serious to leak after wearing and tearing.2. this is a kind of main shaft seal mode relatively more commonly used for the piston type main shaft seal, it is to be made of piston body, piston, wear-resistant ring, stopper pin and bolt, nut etc., piston is installed in the piston body, its working principle is by hydraulic pressure piston to be moved down, piston and wearing plate, facing plate friction, thereby stop current to pass through, to reach the purpose of main shaft seal.Its shortcoming is because piston adopts water rubber to make, and water rubber has rising property of water, therefore the fit tolerance between piston and the piston body requires quite strictness, moreover owing to the manufacturing tolerances of rubber is difficult to guarantee, so cause the success rate of this kind sealing configuration not high; If operational effect is bad when beginning to install in addition, then be difficult to repair, and then very difficult recovery of piston scaling loss in running, also there is aging problem in rubber itself, so influence the sealing reliability of piston.3. the flat main shaft seal of flat main shaft seal is divided into single flat main shaft seal and double-layer plate main shaft seal.Single flat main shaft seal be utilize the individual layer rubber flat plate with the end face that is fixed on the change formation on the main shaft between the crack, seal by hydraulic pressure, its simple in structure, good airproof performance, rubber flat plate directly do not contact with main shaft surface, can be as the packing main shaft seal wear spindle.But its shortcoming is a rubber flat plate in use wear and tear back and lift machine and make water leakage big.The double-layer plate main shaft seal is to utilize double-layer rubber flat board and two planes up and down that are fixed on the rotating disk on the main shaft, inner chamber hydraulic action produces pressure towards two opposite directions respectively and is adjacent to rotating disk (hydraulic pressure is from external water system), plays the end face seal effect.It is compared with single flat main shaft seal, the structure more complicated, same this sealing, the wearing and tearing back and when lifting machine water leakage big, adjust more complicated, maintenance difficult.4. radial seal utilizes several layers of extractive carbon loaf or other high-abrasive materials, under modes such as mechanical spring, radially form radial sealing surfaces with the wear-resistant lining that is enclosed within on the main shaft, and lubricated by clean water, sealing block wearing and tearing back can move radially under the effect of spring, continue to be adjacent to mainshaft bushing, this seal structure complex is installed difficulty of maintenance, and the spring performance is difficult for guaranteeing, it is little radially to estimate one's own ability after the wearing and tearing, so adopt less at present.In sum, existing hydraulic turbine main shaft sealing device all can not be realized reliable sealing sealing, and mechanical loss is big.
The model utility content
The utility model is that a kind of simple in structure, cost is lower, mechanical loss is little hydraulic turbine main shaft sealing structure is provided in order to solve deficiency of the prior art.
A kind of hydraulic turbine main shaft sealing structure, comprise water shutoff box, spindle seal kit, water shutoff gland, waste pipe, described spindle seal kit is sleeved on the main shaft, described water shutoff box puts for dividing the half hitch structure to be fixed in the water turbine main body and to be sleeved on described main shaft seal, the lower end of described water shutoff box fixes a drainpipe, and adopts the comb structure sealing between described spindle seal kit and the described water shutoff box.
In the utility model, described comb structure comprises monodentate and multiple tooth.
In the utility model, be provided with asbestos packing at least together between described spindle seal kit and the described water shutoff box.
The utility model hydraulic turbine main shaft sealing structure, the external tooth that main shaft seal puts intercepts axial current, radially current can flow out by the spilled water hole of water shutoff box external tooth bottom and finally discharge by waste pipe, stuffing box gland and the relative rotation of water shutoff box two toothings simultaneously also can increase the resistance of current, last spindle seal kit outer end is provided with 1 to 2 road packing_seal, increases sealingly secure.Finally reach the effect little, good seal that rubs.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
In the accompanying drawing 1,1---water shutoff box, 2---spindle seal kit, 3---Cock screw, 4---main shaft, 5---water shutoff gland, 6---double-screw bolt, 7---nut, 8---asbestos packing, 9---pad, 10---bolt, 11---waste pipe, 12---comb structure.
Embodiment
Be described in further detail this use is novel below in conjunction with accompanying drawing.
A kind of hydraulic turbine main shaft sealing structure of the present utility model please refer to accompanying drawing.Water shutoff box 1 is for dividing the half hitch structure, spindle seal kit 2 is a completely circular structure, hot jacket is on main shaft 4, spindle seal kit 2 materials are cast iron, change after the convenient wearing and tearing, and fixing with Cock screw 3, water shutoff gland 5 is fixed on the end of water shutoff box 1 by double-screw bolt 6 and nut 7, and waste pipe 11 adopts bolts 10 to be fixed on the bottom of water shutoff box 1.When test-run a machine is installed, look concrete condition and adjust the degree of tightness of nut 7, little to reach friction, the effect of good seal, adopt comb structure 12 sealings between described spindle seal kit 2 and the described water shutoff box 1, described comb structure 12 is a kind of main shaft sealing construction, on spindle seal kit 2 and water shutoff box 1 surface of contact, be provided with protruding circle, on the water shutoff box, be provided with the groove that is slightly larger than described protruding loop diameter thickness, this structure of described protruding circle and groove fit is a comb structure 12, described comb structure 12 on spindle seal kit 2 intercepts axial current, radially current can flow out by the spilled water hole of water shutoff box 1 bottom and be final by waste pipe 11 discharges, spindle seal kit 2 and the relative rotation of water shutoff box 1 comb structure 12 simultaneously also can increase the resistance of current, last spindle seal kit 2 outer ends are provided with one and seal to twice asbestos packing 8, increase sealingly secure.Finally reach the effect little, good seal that rubs.
Above-mentionedly only a kind of instantiation in the utility model is illustrated; but can not as and the protection domain of model utility; everyly do the equivalence made according to the design spirit in the utility model and change or modify, all should think to fall into protection domain of the present utility model.
Claims (3)
1. hydraulic turbine main shaft sealing structure, comprise water shutoff box (1), spindle seal kit (2), water shutoff gland (5), waste pipe (11), described spindle seal kit (2) is sleeved on the main shaft (4), described water shutoff box (1) is fixed in the water turbine main body for branch half hitch structure and is sleeved on the described spindle seal kit (2), the lower end of described water shutoff box (1) fixes a drainpipe (11), it is characterized in that: adopt comb structure (12) sealing between described spindle seal kit (2) and the described water shutoff box (1).
2. hydraulic turbine main shaft sealing structure according to claim 1 is characterized in that: described comb structure (12) comprises monodentate and multiple tooth.
3. hydraulic turbine main shaft sealing structure according to claim 1 and 2 is characterized in that: be provided with at least one asbestos packing (8) between described spindle seal kit (2) and the described water shutoff box (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206054498U CN201874723U (en) | 2010-11-12 | 2010-11-12 | Main shaft-sealing structure for hydroturbines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206054498U CN201874723U (en) | 2010-11-12 | 2010-11-12 | Main shaft-sealing structure for hydroturbines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201874723U true CN201874723U (en) | 2011-06-22 |
Family
ID=44162643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206054498U Expired - Fee Related CN201874723U (en) | 2010-11-12 | 2010-11-12 | Main shaft-sealing structure for hydroturbines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201874723U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103671933A (en) * | 2013-11-30 | 2014-03-26 | 江苏蛟龙重工集团有限公司 | Labyrinth sealing mechanism |
| CN104358653A (en) * | 2014-11-27 | 2015-02-18 | 天津市天发重型水电设备制造有限公司 | Novel bearing and main shaft combined sealing structure |
| 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 |
| CN108980349A (en) * | 2018-09-20 | 2018-12-11 | 重庆通用工业(集团)有限责任公司 | A kind of centrifugal blower compound seal |
| CN111502901A (en) * | 2020-05-14 | 2020-08-07 | 荆门思安机械设备有限公司 | Pawl type wave power generation device |
-
2010
- 2010-11-12 CN CN2010206054498U patent/CN201874723U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103671933A (en) * | 2013-11-30 | 2014-03-26 | 江苏蛟龙重工集团有限公司 | Labyrinth sealing mechanism |
| CN104358653A (en) * | 2014-11-27 | 2015-02-18 | 天津市天发重型水电设备制造有限公司 | Novel bearing and main shaft combined sealing structure |
| 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 |
| CN108980349A (en) * | 2018-09-20 | 2018-12-11 | 重庆通用工业(集团)有限责任公司 | A kind of centrifugal blower compound seal |
| CN108980349B (en) * | 2018-09-20 | 2024-02-06 | 重庆通用工业(集团)有限责任公司 | Composite seal for centrifugal fan |
| CN111502901A (en) * | 2020-05-14 | 2020-08-07 | 荆门思安机械设备有限公司 | Pawl type wave power generation device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201874723U (en) | Main shaft-sealing structure for hydroturbines | |
| CN201874726U (en) | Main shaft sealing device of water turbine | |
| CN202001618U (en) | Magnetic coupling valve | |
| CN204396190U (en) | A kind of horizontal type scraper centrifuger rear bearing sealing device | |
| CN203822237U (en) | Long-acting wellhead sealing device | |
| CN205401721U (en) | Electronic flapper liquid packing seal structure | |
| CN201326750Y (en) | Triple eccentric high-pressure metal seal butterfly valve | |
| CN202955025U (en) | Desulphurization pump mechanical seal structure | |
| CN202852039U (en) | Double-eccentric ball valve | |
| CN205330867U (en) | Shaft seal device and have device's axial flow turbine | |
| CN201062566Y (en) | Hydraulic turbine main-shaft sealing arrangement | |
| CN203477273U (en) | Seal structure for pumping unit reducer shaft head | |
| CN203641512U (en) | Sealing structure of big gear of ball grinder | |
| CN202690410U (en) | Sealing piece structure of pump | |
| CN203322297U (en) | Elastic self-sealing butterfly valve | |
| CN202914369U (en) | Improved sealing structure of centrifugal pumps | |
| CN201671751U (en) | Mixed flow turbine main-axle combination sealing device | |
| CN205744256U (en) | Environment-friendly type Kaplan turbine water lubrication runner | |
| CN205298558U (en) | A wear -resisting rotary seal of self -lubricating for water fatlute pulp grinder | |
| CN201801851U (en) | Wall-through sealing device for steel dam bottom shaft | |
| CN204153197U (en) | There is the floating ball valve of sealability | |
| CN202811314U (en) | Tandem type mechanical seal device | |
| CN201014102Y (en) | Filling-type rotating compensator | |
| CN216555873U (en) | High-protection central swivel joint | |
| CN214248332U (en) | Sealing structure of oil pipe control valve for oil exploitation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110622 Termination date: 20161112 |