CN102818028A - Sand slurry wear-resistant high-position sealing structure for main shaft of water turbine - Google Patents
Sand slurry wear-resistant high-position sealing structure for main shaft of water turbine Download PDFInfo
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- CN102818028A CN102818028A CN2012103059281A CN201210305928A CN102818028A CN 102818028 A CN102818028 A CN 102818028A CN 2012103059281 A CN2012103059281 A CN 2012103059281A CN 201210305928 A CN201210305928 A CN 201210305928A CN 102818028 A CN102818028 A CN 102818028A
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- plate
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- sealing
- seal ring
- wear
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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 invention relates to a sand slurry wear-resistant high-position sealing structure for a main shaft of a water turbine, which is applied to main shaft sealing of a water turbine of a hydropower station in a sediment-laden river basin. A main shaft of the sand slurry wear-resistant high-position sealing structure is provided with a shaft protecting sleeve; the upper part of the shaft protecting sleeve is pressed against the root part of a wear-resistant plate installation base; the plate surface of the wear-resistant plate installation base is vertical to the central line of the main shaft, and is sleeved and fixed on the main shaft; a sealing base is fixed on a top cover through a fastening piece; an air shroud ring is arranged on the sealing base through the fastening piece by using a lower cover plate, and is encircled and hooped on the shaft protecting sleeve; a sealing ring is arranged on the sealing base through the fastening piece by using an outer cover plate; a pressure water communicating pipe fitting is communicated with the lower space of the sealing ring; the upper surface of the sealing ring is pressed against the lower surface of a wear-resistant plate; the wear-resistant plate is arranged on the lower plate surface of the wear-resistant plate installation base; and the upper cavity of a protecting hood is communicated with a sand flushing pipe fitting I and a sand flushing pipe fitting II. The sand slurry wear-resistant high-position sealing structure has the advantages that parts of a sealing device are completely prevented from being worn, the sealing performance is not influenced by machine lifting, and long-term good running is realized.
Description
Technical field
The present invention relates to the high-order sealing configuration of hydraulic turbine main shaft of resisting silt abrasion, be 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 the river sand content 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 measure of resistance to wearing 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 leaked water, avoids the tile kilning phenomenon, influences the bearing shell life-span, and then reduces the power station benefit; And avoid because of 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 means of press seals structure; It is the side feeding press water in the seal ring upper cavity; Seal ring and wearing plate, facing plate are fitted; Keeping off this feasible guard shield surface detention silt water that closely contacts with the wearing plate, facing plate bottom whereby coming to leak water to the silt of runner.In the main shaft rotation process, these are detained silt water and stream at the guard shield upper space, are corroding the sealing configuration part and are causing the wear-out failure of sealing configuration 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 starting shooting once more, may make seal ring and wearing plate, facing plate can not well fit and occur leaking again because of this moving up.
In the structure of existing main shaft seal; Guard shield is the annulus that a transverse section is
shape, is enclosed within on the main shaft.For a long time, the sealing configuration of people's design is all directly the exert pressure object of guard shield as seal ring and air shroud.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, and Just because of this, sealing configuration of the prior art receives the erosion of silt water also just unavoidable.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency of the prior art, it is leak free to provide a kind of unit to lift machine, does not have the high-order sealing configuration of hydraulic turbine main shaft of the resisting silt abrasion that is detained the silt erosion.
The object of the invention can reach through following technical proposals: the high-order sealing configuration of the hydraulic turbine main shaft of resisting silt abrasion comprises runner and the main shaft that links to each other through flange with runner; Comprise top cover and guard shield; Comprise seal ring and press water connecting pipe thereof, and receive the wearing plate, facing plate of seal ring effect; Comprise air shroud; 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 through fastening piece; (ⅲ) air shroud utilizes lower cover plate to be installed on the sealing seat through fastening piece, and encloses hoop on protective shaft sleeve; (ⅳ) seal ring utilizes outer cover plate to be installed on the sealing seat through fastening piece; Below the seal ring, outer cover plate and fitting seat sidewall surround the seal ring lower cavity jointly, 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 present invention compares existing technology and has following advantage:
1, has and compress into the water mode basic change has taken place, be originally that seal ring presses from top to bottom, and be to press from lower to upper after improving.When leaking water, in air, rotating under this structure, there is not wear-out failure problem fully to the seal arrangement part through seal ring.
2, when the unit emergency shutdown occurs lifting machine; This mode of pressing from lower to upper; Stopped to cause when starting shooting once more 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 influence the sealing effect of sealability.
3, increased by two sand surfing pipes, used clean water to feed and clean, a pipe feeds, and another manages discharge, has got rid of most leakage silt siltation volume effectively, has long-term good operational effect.
Description of drawings
Accompanying drawing is a structural representation of the present invention.
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 present invention is further described below in conjunction with accompanying drawing.The high-order sealing configuration of the hydraulic turbine main shaft of resisting silt abrasion comprises runner (1) and the main shaft (17) that links to each other through flange with runner; Comprise top cover (3) and guard shield (27); Comprise seal ring (21) and press water connecting pipe (7) thereof, and receive the wearing plate, facing plate (13) of seal ring (21) effect; Comprise air shroud (23); Improvements of the present invention 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) through lock screw.The plate face of wearing plate, facing plate fitting seat (19) is in the horizontal plane, is used for mechanical fixation applying wearing plate, facing plate (13), perhaps is made into integrated the connection to wearing plate, facing plate (13) with wearing plate, facing plate fitting seat (19).
(ⅱ) sealing seat (5) is fixed on the top cover (3) through fastening piece.This makes that sealing seat (5) is the same with top cover (3) and keeps static with respect to ground.
(ⅲ) air shroud (23) utilizes lower cover plate (25) to be installed on the sealing seat (5) through fastening piece, and encloses hoop on protective shaft sleeve (15).Air shroud (23) is promptly devoted oneself to work under inflated condition.Be usually used in maintenance.So generally, leak the slit that water can travel up to the institute's desire sealing between seal ring (21) and the wearing plate, facing plate (13) from the gap between air shroud (23) and the protective shaft sleeve (15).
(ⅳ) seal ring (21) utilizes outer cover plate (11) to be installed on the sealing seat (5) through 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 feeds from press water connecting pipe (7); Seal ring (21) is pressed to wearing plate, facing plate (13); Make and leak water and do not flow through between the two, reach the be in operation purpose of seal leakage water of unit from seal ring (21) with the wearing plate, facing plate (13) of main shaft (17) rotation.
(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 to feed 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 a press water connecting pipe again, 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 invention is: two symmetrical press water connecting pipes feed 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 feeds has 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 among the present invention (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, so in unit operation, be difficult to directly receive the silt water erosion in this cavity.And the silt water in this cavity in time is discharged to the external world through two sand surfing pipe fittings, has avoided the deposition of silt in this cavity, has kept the long-term normal operation of main shaft seal member, 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 be pressed to wearing plate, facing plate (13), does not exist seal ring (21) to depart from the problem that working state need fall after rise.
Claims (3)
1. the high-order sealing configuration of the hydraulic turbine main shaft of resisting silt abrasion comprises runner (1) and the main shaft (17) that links to each other through flange with runner; Comprise top cover (3) and guard shield (27); Comprise seal ring (21) and press water connecting pipe (7) thereof, and receive the wearing plate, facing plate (13) of seal ring (21) effect; Comprise air shroud (23); 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) through fastening piece; (ⅲ) air shroud (23) utilizes lower cover plate (25) to be installed on the sealing seat (5) through 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) through 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 high-order sealing configuration of the hydraulic turbine main shaft 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 branch half hitch structure.
3. the high-order sealing configuration of the hydraulic turbine main shaft of resisting silt abrasion according to claim 1 and 2; It is characterized in that on sealing seat (5), setting again another press water connecting pipe; 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 |
|---|---|---|---|
| CN2012103059281A CN102818028A (en) | 2012-08-27 | 2012-08-27 | Sand slurry wear-resistant high-position sealing structure for main shaft of water turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103059281A CN102818028A (en) | 2012-08-27 | 2012-08-27 | Sand slurry wear-resistant high-position sealing structure for main shaft of water turbine |
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| CN102818028A true CN102818028A (en) | 2012-12-12 |
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| CN2012103059281A Pending CN102818028A (en) | 2012-08-27 | 2012-08-27 | Sand slurry wear-resistant high-position sealing structure for main shaft of water turbine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111155498A (en) * | 2020-03-27 | 2020-05-15 | 黄河水利水电开发总公司 | Sand blowing and dredging system and method for top cover of water turbine |
| CN111981133A (en) * | 2020-09-04 | 2020-11-24 | 重庆水轮机厂有限责任公司 | Water turbine with main shaft sealing structure |
| CN114576206A (en) * | 2022-03-15 | 2022-06-03 | 江苏省江都水利工程管理处 | Automatic desilting visual guide vane body device of vertical axial-flow pump |
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2012
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111155498A (en) * | 2020-03-27 | 2020-05-15 | 黄河水利水电开发总公司 | Sand blowing and dredging system and method for top cover of water turbine |
| CN111981133A (en) * | 2020-09-04 | 2020-11-24 | 重庆水轮机厂有限责任公司 | Water turbine with main shaft sealing structure |
| CN114576206A (en) * | 2022-03-15 | 2022-06-03 | 江苏省江都水利工程管理处 | Automatic desilting visual guide vane body device of vertical axial-flow pump |
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Application publication date: 20121212 |