CN204127325U - The main shaft sealing construction that a kind of many silt particles axial-flow hydrogenerator group is suitable for - Google Patents
The main shaft sealing construction that a kind of many silt particles axial-flow hydrogenerator group is suitable for Download PDFInfo
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- CN204127325U CN204127325U CN201420478247.XU CN201420478247U CN204127325U CN 204127325 U CN204127325 U CN 204127325U CN 201420478247 U CN201420478247 U CN 201420478247U CN 204127325 U CN204127325 U CN 204127325U
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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
Abstract
The utility model discloses a kind of main shaft sealing construction being applicable to many silt particles axial-flow hydrogenerator group and being suitable for.This structure utilizes the pressure difference of suspended ring both sides water cavity, and the elastic force of spring and the frictional force that Y type seals, suspended ring weight produces reach equilibrium of forces, form moisture film and reach sealing effect between suspended ring and wearing ring.This sealing structure has self balancing, self-regulation, self-compensating property.Namely the utility model avoids the problem of packing_seal mill axle, and when solving again unit operation, rotating part moves down the problem on seal quantity impact, is particularly useful for many silt particles tubular turbine and uses; Successful Application of the present utility model, has enriched the main shaft sealing construction form of China's bulb-type hydraulic generating set; The utility model has the advantage that sealability is reliable, sealing life is long, and the working life that can effectively raise many silt particles power station main shaft seal reaches more than 3 times.
Description
Technical field
The utility model relates to the main shaft sealing construction that a kind of many silt particles bulb-type hydraulic generating set is suitable for.
Background technique
China is in hydroelectric power industry, and bulb-type hydraulic generating set has a wide range of applications.Bulb-type hydraulic generating set is a kind of lower bed power station, and it is poor that main shaft seal is sealed water cavity condition of water quality, the quick abrasion of main shaft seal, and the working life of main shaft seal is short, can not meet the requirement of power plant safety working time.Especially when power station is positioned on many silt particles river, the working life of main shaft seal can sharply shorten, and sealing water leakage increases, and causes power station water logging bearing, unit failure to shut down.
The structural type of current seal of principal axis of water turbine in type of stay column mainly contains following several: the structural type of radial packing sealing and axial end plate seal or more radial seal and axial seal conbined usage.
As shown in Figure 1, packing_seal belongs to a kind of form of contact type gland sealed, has the advantages that structural type is simple, easy for installation.Packing makes to be sealed water by repeatedly throttling with being coupling to touch, and reach sealing effect, but run after a period of time, especially many silt particles power station, can be entered between packing and main shaft by the addle sealed, and causes main shaft heavy wear to cause the result of seal failure.
As shown in Figure 2, plate seal utilizes dull and stereotyped and is fixed between end face that the change on main shaft formed and forms seal clearance, and lubricate water hydraulic pressure seal by cleaning, structure is simple.Tubular turbine, when unit operation, hydraulic thrust effect blade causes whole rotating part to move about about 0.5mm to side, downstream, and make to seal crush during unit operation and reduce, water leakage increases.Especially for many silt particles tubular turbine of high head, it is more obvious that water leakage increases.
Summary of the invention
The purpose of this utility model is to provide the main shaft sealing construction that a kind of many silt particles bulb-type hydraulic generating set is suitable for.Technological scheme is: the main shaft sealing construction that a kind of many silt particles bulb-type hydraulic generating set is suitable for, and forms primarily of with lower component: suspended ring (1), spring (2), Y type sealing (3), rotation abrasion resistance of metal ring (4), guidance tape (5), adjusting bolt (6) composition.Suspended ring (1) spring (2) and adjusting bolt (6) carry out axial restraint, suspended ring (1) carries out circumference with guidance tape (5) and supports, suspended ring (1) excircle arranges Y type sealing (3), and suspended ring (1) axially contacts with rotation abrasion resistance of metal ring (4).
Technique effect
The structural type of current seal of principal axis of water turbine in type of stay column mainly contains following several: the structural type of radial packing sealing and axial end plate seal or more radial seal and axial seal conbined usage.These two kinds of sealing configuration forms, are used on many silt particles bulb-type hydraulic generating set and all have certain narrow limitation.
Packing_seal is for ensureing sealing effect, the crush of packing must be increased, cause the contact pressure stress between packing and main shaft to increase, cause the wearing and tearing of main shaft and packing, as by sealing water be sand water, the wearing and tearing of main shaft and packing more can aggravate, sealing shortening in working life.
Plate seal uses on bulb-type hydraulic generating set, when taking into full account unit operation, rotating part moves down the impact on sealing effect, though can by increasing the crush of the pressure adjusting flat board of seal lubrication water, the increase due to seal lubrication water pressure also can cause the increase sealing water leakage.Tubular-Francis turbine belongs to low-head hydroelectric plant, and as improved the pressure of seal lubrication water, need increase a set of equipment such as suction booster, economic benefit and later maintenance workload all can correspondingly increase.
Namely sealing configuration form involved by the utility model avoids the problem of packing_seal mill axle, and when solving again unit operation, rotating part moves down the problem on seal quantity impact, is especially suitable for and uses with many silt particles tubular turbine.The advantage of this main shaft sealing construction is:
1) seal form belongs to axial seal, there is not the wear problem of radial seal to main shaft;
2) crush of axial seal can carry out self-regulating according to the carrying out practically condition in power station by spring, avoids seal lubrication water pressure deficiency outer need set up standby problem;
3) when the crush of axial seal reduces due to wearing and tearing, the elastic force by spring carries out self compensation, reduces the workload of operation maintenance;
4) act on the water pressure in axial seal, frictional force and spring force can reach self balancing, be conducive to forming moisture film between sealing pair, reduce the wearing and tearing of sealing, improve the working life of sealing;
5) allow sealing wear value large, improve the working life of sealing, especially more applicable for many silt particles power station.
Working principle
When turbine-generator units runs, seal lubrication water is passed at suspended ring epicoele, utilize the pressure difference that suspended ring (1) both sides sealing lubricates water hydraulic pressure and formed by sealing hydraulic pressure, discharge pressure, the frictional force that the frictional force of the elastic force of spring (2) and Y type sealing (3), the weight of suspended ring (1) produce reaches equilibrium of forces, forms closely spaced moisture film and reach sealing effect between suspended ring (1) and rotation abrasion resistance of metal ring (4).During unit operation, due to the effect of hydraulic thrust, whole rotation section branch swims side downwards and moves about 0.5mm, now by the change of the elastic force of spring (2), the self compensation object of suspended ring (1) can be reached, maintain the moisture film between sealing pair, ensure that the crush of sealing pair does not change, reach sealing effect.When unit generation exerts oneself adjustment, can be changed by the pressure of sealing water cavity, the water pressure missionary society now acting on suspended ring (1) both sides changes, by the force variation of spring (2), and the change of Y type sealing (3) frictional force, make suspended ring (1) reach new equilibrium of forces, form the moisture film between sealing pair, ensure sealing effect.Due to the self balancing of sealing configuration, self-regulation and self-compensating property, the moisture film between sealing pair can be maintained all the time, wear extent is little, be particularly useful for many silt particles bulb-type hydraulic generating set.For ensureing the flexibility ratio of suspended ring action, being provided with guidance tape (5) in suspended ring both sides and supporting; For reduction processing and installation quality are on the impact of main shaft seal effect, spring (2) is provided with adjusting bolt (6), the elastic force of result to spring (2) can be manufactured according to the carrying out practically condition in power station and spring rate and adjust.
Accompanying drawing explanation
Fig. 1 is packing sealing structure schematic diagram
Fig. 2 is flat plate sealing structure schematic diagram
Fig. 3 is the main shaft sealing construction schematic diagram that many silt particles power station is suitable for
Embodiment
The utility model is as shown in Figure 3 a kind of main shaft sealing construction being applicable to many silt particles bulb-type hydraulic generating set.When turbine-generator units runs, seal lubrication water is passed at suspended ring epicoele, utilize the pressure difference that suspended ring 1 both sides sealing lubricates water hydraulic pressure and formed by sealing hydraulic pressure, discharge pressure, the frictional force that the frictional force of the elastic force of spring 2 and Y type sealing 3, the weight of suspended ring 1 produce reaches equilibrium of forces, forms closely spaced moisture film and reach sealing effect between suspended ring 1 and rotation abrasion resistance of metal ring 4.During unit operation, due to the effect of hydraulic thrust, whole rotation section branch swims side downwards and moves about 0.5mm, now by the change of the elastic force of spring 2, the self compensation object of suspended ring 1 can be reached, maintain the moisture film between sealing pair, ensure that the crush of sealing pair does not change, reach sealing effect.When unit generation exerts oneself adjustment, can be changed by the pressure of sealing water cavity, the water pressure missionary society now acting on suspended ring 1 both sides changes, by the force variation of spring 2, and Y type seals the change of 3 frictional force, make the equilibrium of forces that suspended ring 1 reaches new, form the moisture film between sealing pair, ensure sealing effect.Due to the self balancing of sealing configuration, self-regulation and self-compensating property, the moisture film between sealing pair can be maintained all the time, wear extent is little, be particularly useful for many silt particles bulb-type hydraulic generating set.For ensureing the flexibility ratio of suspended ring action, being provided with guidance tape 5 in suspended ring both sides and supporting; For reduction processing and installation quality are on the impact of main shaft seal effect, spring 2 is provided with adjusting bolt 6, the elastic force of result to spring 2 can be manufactured according to the carrying out practically condition in power station and spring rate and adjust.
Claims (1)
1. the main shaft sealing construction that silt particle bulb-type hydraulic generating set more than a kind is applicable, it is characterized in that: by suspended ring (1), spring (2), Y type sealing (3), rotate abrasion resistance of metal ring (4), guidance tape (5), adjusting bolt (6) forms, suspended ring (1) spring (2) and adjusting bolt (6) carry out axial restraint, suspended ring (1) carries out circumference with guidance tape (5) and supports, suspended ring (1) excircle arranges Y type sealing (3), suspended ring (1) axially contacts with rotation abrasion resistance of metal ring (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420478247.XU CN204127325U (en) | 2014-08-22 | 2014-08-22 | The main shaft sealing construction that a kind of many silt particles axial-flow hydrogenerator group is suitable for |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420478247.XU CN204127325U (en) | 2014-08-22 | 2014-08-22 | The main shaft sealing construction that a kind of many silt particles axial-flow hydrogenerator group is suitable for |
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| Publication Number | Publication Date |
|---|---|
| CN204127325U true CN204127325U (en) | 2015-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420478247.XU Active CN204127325U (en) | 2014-08-22 | 2014-08-22 | The main shaft sealing construction that a kind of many silt particles axial-flow hydrogenerator group is suitable for |
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| CN (1) | CN204127325U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971804A (en) * | 2016-07-05 | 2016-09-28 | 国家电网公司 | Supporting device for main shaft seal abrasion loss sensor |
-
2014
- 2014-08-22 CN CN201420478247.XU patent/CN204127325U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971804A (en) * | 2016-07-05 | 2016-09-28 | 国家电网公司 | Supporting device for main shaft seal abrasion loss sensor |
| CN105971804B (en) * | 2016-07-05 | 2018-08-17 | 国家电网公司 | A kind of main shaft seal wear extent sensor support device |
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