CN202300796U - Pump type pressure reducing mechanism of rotary wheel of water turbine - Google Patents
Pump type pressure reducing mechanism of rotary wheel of water turbine Download PDFInfo
- Publication number
- CN202300796U CN202300796U CN2011204432078U CN201120443207U CN202300796U CN 202300796 U CN202300796 U CN 202300796U CN 2011204432078 U CN2011204432078 U CN 2011204432078U CN 201120443207 U CN201120443207 U CN 201120443207U CN 202300796 U CN202300796 U CN 202300796U
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- CN
- China
- Prior art keywords
- water turbine
- rotary wheel
- pump
- pressure reducing
- pump type
- 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.)
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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 utility model relates to a pressure reducing technology of an upper crown cavity of a mixed-flow water turbine, in particular to a pump type pressure reducing mechanism of a rotary wheel of the water turbine. The pump type pressure reducing mechanism, which can be used for reducing the pressure of the upper crown cavity of the mixed-flow water turbine, mainly aims at overcoming the defects in the prior art. The main technical scheme adopted by the utility model is as follows: the pump type pressure reducing mechanism comprises a water turbine main shaft and the rotary wheel, wherein the rotating wheel is arranged on the water turbine main shaft; an upper crown and a cover plate on the rotary wheel form the upper crown cavity; a lower ring and the rotary wheel form a lower pressure cavity; the upper crown cavity is provided with a pump plate which is connected with a water discharging pipe.
Description
Technical field
The utility model relates to a kind of decompression technology of crown chamber of Francis turbine, and concrete is a kind of pump formula mechanism of decompressor of rotary wheel of water turbine.
Background technique
The Francis turbine compact structure, efficient is higher, can adapt to very wide head scope, is one of extensive water turbine pattern that adopts in present countries in the world.
Water turbine crown cavity pressure is crossed conference and caused main shaft seal to leak and downward hydraulic thrust, will reduce pressure during design as far as possible, and is as shown in Figure 1; Conventional method is for opening one group of weep hole 10 on runner; Be discharged to runner low pressure chamber 7 runners to the press water in crown chamber through weep hole, yet this can destroy the runner bucket fluidised form; The part layer rheology is a turbulent flow, thereby influences turbine efficiency.
Summary of the invention
The main purpose of the utility model is to overcome deficiency of the prior art, and a kind of pump formula mechanism of decompressor of rotary wheel of water turbine of decompression of the crown chamber that can be used in Francis turbine is provided.
The above-mentioned technical problem of the utility model is able to implement through following technological scheme: a kind of pump formula mechanism of decompressor of rotary wheel of water turbine; Comprise hydraulic turbine main shaft; Be arranged on the runner on the main shaft, crown on the runner and cover plate form the crown chamber, and following ring and runner form low pressure chamber; On described crown chamber, the pump sheet is set, connects waste pipe on the pump sheet.
As preferably, described pump sheet is arranged on cover plate upside and downside.
As preferably, described waste pipe vertically is arranged on the pump sheet of cover plate upside.
The beneficial effect of the utility model is: utilize the effect of pump sheet, can directly high pressure water be discharged to outside the machine through waste pipe, as cooling water; Realize the decompression of pump formula; Reduce the pressure in the crown chamber, and, thus; Can reach protection runner bucket fluidised form and can practice thrift outside water again, increase the efficient of water turbine.
Description of drawings
Fig. 1 is the crown chamber pressure reduction structure schematic representation of existing technology.
Fig. 2 is the structural representation of the utility model.
Among the figure: 1, hydraulic turbine main shaft, 2, runner, 3, crown, 4, cover plate, 5, the crown chamber, 6, ring down, 7, low pressure chamber, 8, the pump sheet, 9, waste pipe, 10, weep hole.
Embodiment
Through embodiment,, do further bright specifically below to the technological scheme of the utility model in conjunction with accompanying drawing:
Embodiment 1: as shown in Figure 2, a kind of pump formula mechanism of decompressor of rotary wheel of water turbine comprises hydraulic turbine main shaft 1; Be arranged on the runner 2 on the main shaft, the crown 3 on the runner forms crown chamber 5 with cover plate 4, and following ring 6 forms low pressure chamber 7 with runner; It is characterized in that, on described crown chamber 5, pump sheet 8 is set, connect waste pipe 9 on the pump sheet; The pump sheet is arranged on cover plate upside and downside, and described waste pipe vertically is arranged on the pump sheet of cover plate upside.
The utility model utilization can the pump sheet effect, directly high pressure water is discharged to outside the machine through waste pipe, as cooling water, realize the decompression of pump formula, thus, can reach the protection fluidised form and can practice thrift outside water again.
Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from the spirit of the utility model or surmount the defined scope of appended claims.
Claims (3)
1. the pump formula mechanism of decompressor of a rotary wheel of water turbine; Comprise hydraulic turbine main shaft (1), be arranged on the runner (2) on the main shaft, crown on the runner (3) and cover plate (4) form crown chamber (5); Following ring (6) and runner form low pressure chamber (7); It is characterized in that, pump sheet (8) is set on described crown chamber, connect waste pipe (9) on the pump plate.
2. the pump formula mechanism of decompressor of rotary wheel of water turbine according to claim 1 is characterized in that, described pump sheet is arranged on cover plate upside and downside.
3. the pump formula mechanism of decompressor of rotary wheel of water turbine according to claim 1 is characterized in that, described waste pipe vertically is arranged on the pump sheet of cover plate upside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204432078U CN202300796U (en) | 2011-11-10 | 2011-11-10 | Pump type pressure reducing mechanism of rotary wheel of water turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204432078U CN202300796U (en) | 2011-11-10 | 2011-11-10 | Pump type pressure reducing mechanism of rotary wheel of water turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202300796U true CN202300796U (en) | 2012-07-04 |
Family
ID=46369705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204432078U Expired - Lifetime CN202300796U (en) | 2011-11-10 | 2011-11-10 | Pump type pressure reducing mechanism of rotary wheel of water turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202300796U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110805514A (en) * | 2019-11-21 | 2020-02-18 | 大唐迪庆香格里拉电力开发有限公司 | Pressure relief and drainage device for top cover of horizontal mixed-flow water turbine |
| CN113700587A (en) * | 2021-08-23 | 2021-11-26 | 湖南云箭集团有限公司 | Detachable pump plate structure of water turbine runner |
-
2011
- 2011-11-10 CN CN2011204432078U patent/CN202300796U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110805514A (en) * | 2019-11-21 | 2020-02-18 | 大唐迪庆香格里拉电力开发有限公司 | Pressure relief and drainage device for top cover of horizontal mixed-flow water turbine |
| CN113700587A (en) * | 2021-08-23 | 2021-11-26 | 湖南云箭集团有限公司 | Detachable pump plate structure of water turbine runner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |