CN202768843U - Sand erosion resistant water turbine main shaft seal mechanism - Google Patents
Sand erosion resistant water turbine main shaft seal mechanism Download PDFInfo
- Publication number
- CN202768843U CN202768843U CN2012204256827U CN201220425682U CN202768843U CN 202768843 U CN202768843 U CN 202768843U CN 2012204256827 U CN2012204256827 U CN 2012204256827U CN 201220425682 U CN201220425682 U CN 201220425682U CN 202768843 U CN202768843 U CN 202768843U
- Authority
- CN
- China
- Prior art keywords
- main shaft
- plate
- seal ring
- seat
- 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
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
- Hydraulic Turbines (AREA)
Abstract
The utility model relates to a sand erosion resistant water turbine main shaft seal mechanism which is applied to main shaft seal of a water turbine of a hydropower station in a drainage basin with much sand. A main shaft of the sand erosion resistant water turbine main shaft seal mechanism is provided with a shaft protecting sleeve, and the upper portion of the shaft protecting sleeve abuts against the root portion of an abrasion resistant plate installation seat. The plate face of the abrasion resistant plate installation seat is perpendicular to the central axis of the main shaft, and is fixed on the main shaft in a sleeved mode. A seal seat is fixed on a top cover through a fastening piece, an air shroud ring is arranged on the seal seat by utilizing a lower covering plate through a fastening piece, and is hooped on the shaft protecting sleeve. A seal ring is arranged on the seal seat by utilizing an outer cover plate through a fastening piece, and a pressure water communicating pipe is communicated with the lower space of the seal ring. The upper surface of the seal ring abuts against the lower surface of the abrasion resistant plate, and an abrasion resistant plate is arranged on the lower plate face of the abrasion resistant installation seat. An upper cavity of a shield is communicated with a sand flushing pipe I and a sand flushing pipe II. The sand erosion resistant water turbine main shaft seal mechanism has the advantages that seal device parts are completely free from abrasion, seal performance is not affected by lifting of a machine, and the sand erosion resistant water turbine main shaft seal mechanism can run well for a long time.
Description
Technical field
The utility model relates to the main shaft-sealing structure for hydroturbines of resisting silt abrasion, is applied to the main shaft seal of high concentration of sediment basin water power station water turbine.
Background technique
China's waterpower resourses are contained abundant, occupy first place, the world.But silt content of river is very high, and especially the Yellow River, the Changjiang river have become fully-loaded stream, and other each great river sediment discharge also increases gradually.Therefore the wear resistance in high concentration of sediment power station just becomes the research topic that people pay close attention to.
In the structural design of high concentration of sediment power station unit, can not indiscriminately imitate the structure of operational excellence in the clear water power station fully.Main shaft seal is being played the part of the role of the sealing that blocks water in hydraulic turbine structure, mainly be the intrusion that the oily guide bearing of protection is not subjected to water leakage, avoids the tile kilning phenomenon, affects the bearing shell life-span, and then reduces power generation; And avoid because leaking the increase of the water yield, the water distributor on the water logging top cover causes part to get rusty, and shortens the working life of part.
The main shaft seal of existing high concentration of sediment power station unit adopts end face piston-type underwater pressure sealing structure, it is that a side in the seal ring upper cavity passes into press water, seal ring and wearing plate, facing plate are fitted, whereby coming the silt water leakage to runner keeping off, this so that with the guard shield surface detention silt water of wearing plate, facing plate bottom close contact.In the main shaft rotation process, these are detained silt water and stream at the guard shield upper space, are corroding sealing structure part and are causing the wear-out failure of sealing structure part, force seal ring to lose efficacy in a short time.Simultaneously, when this sealing configuration occurred lifting machine at the unit emergency shutdown, seal ring can move up because wearing plate, facing plate moves up; When again starting shooting, may make because of this moving up again seal ring and wearing plate, facing plate can not well fit and occur leaking.
In the structure of existing main shaft seal, guard shield is that a transverse section is
The annulus of shape is enclosed within on the main shaft.The air shroud of maintenance usefulness directly binds round on the outer side surface of guard shield, and seal ring then places on the upper surface (horizontal plane) of guard shield across wearing plate, facing plate.Seal ring, air shroud residing position in enclosed cavity is very low, is subjected to the erosion of silt water also just unavoidable.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency of the prior art, provides a kind of unit to lift machine leak free, without the main shaft-sealing structure for hydroturbines of the resisting silt abrasion that is detained soil erosion.
The purpose of this utility model can reach by following technical proposals: the main shaft-sealing structure for hydroturbines of resisting silt abrasion, the main shaft, top cover, guard shield, seal ring, press water connecting pipe, the wearing plate, facing plate that is subjected to the seal ring effect and the air shroud that comprise runner, link to each other by flange with runner; It is characterized in that (ⅰ) main shaft band protective shaft sleeve; Protective shaft sleeve top is against wearing plate, facing plate fitting seat root; The plate face of wearing plate, facing plate fitting seat is vertical with spindle centerline, is fixed on the main shaft; (ⅱ) sealing seat is fixed on the top cover by fastening piece; (ⅲ) air shroud utilizes lower cover plate to be installed on the sealing seat by fastening piece, and encloses hoop on protective shaft sleeve; (ⅳ) seal ring utilizes outer cover plate to be installed on the sealing seat by fastening piece; Seal ring is following, outer cover plate and fitting seat sidewall surround the seal ring lower cavity jointly, and the press water connecting pipe is installed on the sealing seat, and is communicated with the seal ring lower cavity; The seal ring upper surface is against on the lower surface of wearing plate, facing plate, and wearing plate, facing plate is fixed on the lower face of wearing plate, facing plate fitting seat; (ⅴ) guard shield, lower cover plate, sealing seat sidewall surround the guard shield upper cavity jointly, and this cavity is communicated with sand surfing pipe fitting I, sand surfing pipe fitting II; Sand surfing pipe fitting I, sand surfing pipe fitting II are installed on the sealing seat, lay respectively at the both sides of main shaft.
The utility model has following advantage compared to existing technology:
1, has and compress into the water mode basic change has occured, be originally that seal ring presses from top to bottom, and be to press from lower to upper after improving.When water leakage passes through seal ring, in air, rotating under this structure, there is not the wear-out failure problem to the seal arrangement part fully.
2, when the unit emergency shutdown occurs lifting machine; this mode of pressing from lower to upper; stopped to cause when again starting shooting that seal ring moves up and makes can not well the fit generation of situation of seal ring and wearing plate, facing plate, guaranteed that the machine of lifting does not affect the sealing effect of sealability.
3, increased by two sand surfing pipes, used clean water to pass into cleaning, a pipe passes into, and another manages discharge, has effectively got rid of most leakage Sediment Siltation amount, has long-term good operational effect.
Description of drawings
Accompanying drawing is structural representation of the present utility model.
1 is runner among the figure, the 3rd, and top cover, the 5th, sealing seat, the 7th, press water connecting pipe, the 9th, sand surfing pipe fitting I, the 11st, outer cover plate, the 13rd, wearing plate, facing plate, the 15th, protective shaft sleeve, the 17th, main shaft, the 19th, wearing plate, facing plate fitting seat, the 21st, seal ring, the 23rd, air shroud, the 25th, lower cover plate, the 27th, guard shield.
Embodiment
The utility model is further described below in conjunction with accompanying drawing.The main shaft-sealing structure for hydroturbines of resisting silt abrasion, is subjected to wearing plate, facing plate (13) and the air shroud (23) of seal ring (21) effect at main shaft (17), top cover (3), guard shield (27), seal ring (21), the press water connecting pipe (7) that comprises runner (1), links to each other by flange with runner; Improvements of the present utility model are:
(ⅰ) main shaft (17) band protective shaft sleeve (15); Protective shaft sleeve (15) top is against wearing plate, facing plate fitting seat (19) root; The plate face of wearing plate, facing plate fitting seat (19) is vertical with spindle centerline, is fixed on the main shaft (17) by lock screw.The plate face of wearing plate, facing plate fitting seat (19) is in the horizontal plane, is used for fixedly applying wearing plate, facing plate (13) of machinery, perhaps wearing plate, facing plate (13) is made into integrated the connection with wearing plate, facing plate fitting seat (19).
(ⅱ) sealing seat (5) is fixed on the top cover (3) by fastening piece.This keeps static with respect to ground so that sealing seat (5) is the same with top cover (3).
(ⅲ) air shroud (23) utilizes lower cover plate (25) to be installed on the sealing seat (5) by fastening piece, and encloses hoop on protective shaft sleeve (15).Air shroud (23) is namely devoted oneself to work under inflated condition.Be usually used in maintenance.Therefore generally, water leakage can travel up to from the gap between air shroud (23) and the protective shaft sleeve (15) slit of the institute's wish sealing between seal ring (21) and the wearing plate, facing plate (13).
(ⅳ) seal ring (21) utilizes outer cover plate (11) to be installed on the sealing seat (5) by fastening piece, below the seal ring (21), outer cover plate (11) and fitting seat sidewall surround the seal ring lower cavity jointly, press water connecting pipe (7) is installed on the sealing seat (5), and is communicated with the seal ring lower cavity.Seal ring (21) upper surface is against on the lower surface of wearing plate, facing plate (13), and wearing plate, facing plate (13) is fixed on the lower face of wearing plate, facing plate fitting seat (19).Press water passes into from press water connecting pipe (7), seal ring (21) is pressed to wearing plate, facing plate (13), water leakage is not flow through between the two from seal ring (21) with the wearing plate, facing plate (13) of main shaft (17) rotation, reach the be in operation purpose of seal leakage water of unit.
(ⅴ) guard shield (27), lower cover plate (25), sealing seat sidewall surround the guard shield upper cavity jointly, and this cavity is communicated with sand surfing pipe fitting I (9), sand surfing pipe fitting II; Sand surfing pipe fitting I (9), sand surfing pipe fitting II are installed on the sealing seat (5), lay respectively at the both sides of main shaft.Sand surfing pipe fitting I (9), sand surfing pipe fitting II are used for passing into clear water the silt on guard shield top are discharged.
More even for seal ring (21) and wearing plate, facing plate are fitted, can on sealing seat (5), set again a press water connecting pipe, two press water connecting pipes lay respectively at the both sides of main shaft (17), symmetrically.
For the ease of dismounting and installation, sealing seat (5), outer cover plate (11), wearing plate, facing plate fitting seat (19) are all made composition half hitch structure.
Operating process of the present utility model is: two symmetrical press water connecting pipes pass into press water from the main shaft both sides in the seal ring lower cavity, so just make seal ring (21) and wearing plate, facing plate (13) fit more evenly, strengthen the effect of sealing.Sand surfing pipe fitting I (9) on sealing seat (5), sand surfing pipe fitting II, a pipe has passed into the pressure clean water, another pipe is discharged the silt water in guard shield (27) the upper shroud upper cavity, can leak the silt water that comes by runner and drain, and remaining leakage directly enters top cover by seal ring.
Seal ring in the utility model (21), all high guard shield upper cavity that places guard shield (27) top of air shroud (23) are positioned at the top outside this cavity, therefore the very difficult silt water erosion that directly is subject in this cavity in unit operation.And the silt water in this cavity in time is discharged to the external world by two sand surfing pipe fittings, has avoided the deposition of silt in this cavity, has kept the long-term normal operation of spindle sealing structural part, has long-term good operational effect.Seal ring is pressed the working method of wearing plate, facing plate from lower to upper, and when unit occurred lifting machine, seal ring (21) only can press to wearing plate, facing plate (13), does not exist seal ring (21) to depart from the problem that working state need to fall after rise.
Claims (3)
1. the main shaft-sealing structure for hydroturbines of resisting silt abrasion, main shaft (17), top cover (3), guard shield (27), seal ring (21), the press water connecting pipe (7) that comprises runner (1), links to each other by flange with runner, wearing plate, facing plate (13) and the air shroud (23) that is subjected to seal ring (21) effect; It is characterized in that (ⅰ) main shaft (17) band protective shaft sleeve (15); Protective shaft sleeve (15) top is against wearing plate, facing plate fitting seat (19) root; The plate face of wearing plate, facing plate fitting seat (19) is vertical with spindle centerline, is fixed on the main shaft (17); (ⅱ) sealing seat (5) is fixed on the top cover (3) by fastening piece; (ⅲ) air shroud (23) utilizes lower cover plate (25) to be installed on the sealing seat (5) by fastening piece, and encloses hoop on protective shaft sleeve (15); (ⅳ) seal ring (21) utilizes outer cover plate (11) to be installed on the sealing seat (5) by fastening piece; Below the seal ring, outer cover plate (11) and fitting seat sidewall surround the seal ring lower cavity jointly, and press water connecting pipe (7) is installed on the sealing seat (5), and are communicated with the seal ring lower cavity; Seal ring (21) upper surface is against on the lower surface of wearing plate, facing plate (13), and wearing plate, facing plate (13) is fixed on the lower face of wearing plate, facing plate fitting seat (19); (ⅴ) guard shield (27), lower cover plate (25), sealing seat sidewall surround the guard shield upper cavity jointly, and this cavity is communicated with sand surfing pipe fitting I (9), sand surfing pipe fitting II; Sand surfing pipe fitting I (9), sand surfing pipe fitting II are installed on the sealing seat (5), lay respectively at the both sides of main shaft.
2. the main shaft-sealing structure for hydroturbines of resisting silt abrasion according to claim 1 is characterized in that sealing seat (5), outer cover plate (11), wearing plate, facing plate fitting seat (19) are minute half structure.
3. the main shaft-sealing structure for hydroturbines of resisting silt abrasion according to claim 1 and 2 is characterized in that setting another press water connecting pipe on sealing seat (5) again, and two press water connecting pipes lay respectively at the both sides of main shaft (17), symmetrically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204256827U CN202768843U (en) | 2012-08-27 | 2012-08-27 | Sand erosion resistant water turbine main shaft seal mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204256827U CN202768843U (en) | 2012-08-27 | 2012-08-27 | Sand erosion resistant water turbine main shaft seal mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202768843U true CN202768843U (en) | 2013-03-06 |
Family
ID=47775418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012204256827U Expired - Fee Related CN202768843U (en) | 2012-08-27 | 2012-08-27 | Sand erosion resistant water turbine main shaft seal mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202768843U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818028A (en) * | 2012-08-27 | 2012-12-12 | 福建南电股份有限公司 | Sand slurry wear-resistant high-position sealing structure for main shaft of water turbine |
| CN104132139A (en) * | 2013-11-22 | 2014-11-05 | 成都科创佳思科技有限公司 | Main shaft sealing structure for water turbine |
-
2012
- 2012-08-27 CN CN2012204256827U patent/CN202768843U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818028A (en) * | 2012-08-27 | 2012-12-12 | 福建南电股份有限公司 | Sand slurry wear-resistant high-position sealing structure for main shaft of water turbine |
| CN104132139A (en) * | 2013-11-22 | 2014-11-05 | 成都科创佳思科技有限公司 | Main shaft sealing structure for water turbine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205078455U (en) | Composite seal formula sediment stuff pump | |
| CN202768843U (en) | Sand erosion resistant water turbine main shaft seal mechanism | |
| CN102003325B (en) | Working sealing device for water turbine spindle | |
| CN102818028A (en) | Sand slurry wear-resistant high-position sealing structure for main shaft of water turbine | |
| CN108518481B (en) | Water wheel motor main shaft seal structure | |
| CN206555436U (en) | A kind of sealing device of mainshaft for horizontal water turbine | |
| CN104315147B (en) | A kind of power type non-contact type main shaft sealing device | |
| CN203258066U (en) | Main shaft working sealing device of horizontal water turbine | |
| CN202140229U (en) | Hydrogenerator spindle center-hole reinflation and drainage device | |
| CN104612883B (en) | A kind of water-turbine top cover, cylindrical valve arrangement and its hydraulic turbine | |
| CN204532662U (en) | A kind of water-turbine top cover, cylindrical valve layout and water turbine thereof | |
| CN106812943B (en) | Oil seal mounting structure for washing machine and washing machine | |
| CN201318312Y (en) | Water-filling submersible electric pump | |
| CN205533398U (en) | Mechanical seal for slurry pump | |
| CN204827770U (en) | Hydraulic turbine shaft seal structure | |
| CN202091093U (en) | Improved water turbine main shaft sealing device | |
| CN209414184U (en) | A kind of novel submersible pollution discharge pump | |
| CN201891548U (en) | Operation sealing device of water turbine spindle | |
| CN207333088U (en) | A kind of big axis making-up air device of turbine-generator units | |
| CN201041232Y (en) | Open type energy-saving sealing device | |
| CN201651495U (en) | Wear-resistant residue valve | |
| CN202451825U (en) | Spindle seal self-compensating type structure | |
| CN201991674U (en) | Water guide device for hydroelectric power generation | |
| CN201301774Y (en) | Floating-type main shaft sealing structure used for tubular turbine | |
| CN201087284Y (en) | Sealing dustproof structure of washing machine speed reduction clutch |
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 |
Granted publication date: 20130306 Termination date: 20140827 |
|
| EXPY | Termination of patent right or utility model |