CN218266159U - Hydraulic turbine runner pump plate and seal structure - Google Patents
Hydraulic turbine runner pump plate and seal structure Download PDFInfo
- Publication number
- CN218266159U CN218266159U CN202222649299.6U CN202222649299U CN218266159U CN 218266159 U CN218266159 U CN 218266159U CN 202222649299 U CN202222649299 U CN 202222649299U CN 218266159 U CN218266159 U CN 218266159U
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- pump plate
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- runner
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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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Abstract
The utility model discloses a hydraulic turbine runner pump plate and seal structure comprises apron, runner crown, pump plate inlet hole, the pump plate of taking over and the main shaft seal seat under pump plate upper ring plate, pump plate blade, the pump plate are sealed, high-pressure chamber, low-pressure chamber, the top cap. The utility model discloses can be applied to mixed-flow hydroelectric set, through putting crown pump plate to one side, increase the intake pressure of top cap to reach the requirement of unit technical water supply, can reduce the produced axial water thrust of crown water pressure simultaneously, improve the purpose of unit stability ability.
Description
Technical Field
The utility model relates to a hydraulic turbine field especially relates to a hydraulic turbine runner pump board and seal structure.
Background
The axial hydraulic thrust of the water turbine has great influence on the safe operation and stability of the unit. At present, a water turbine generator set is generally provided with a pressure equalizing pipe on a top cover or a pressure reducing hole is dug on a runner crown to discharge pressure water to tail water, so that the water pressure in a cavity between the runner and the top cover is reduced, and the purpose of reducing the water thrust is achieved. Although the design idea can solve the problem of overlarge thrust load, the defect is that a large amount of leakage water passing through the leakage stopping gap is directly discharged, so that the large volume loss and the volume efficiency reduction of the water turbine are caused, and the waste of water resources is also formed. Accessible top cap water intaking mode sets up a plurality of water intakes at mixed flow water turbine top cap promptly, and the technique water supply source of unit is regarded as to the leakage water that does not do work in the cavity between crown on top cap and the runner, is favorable to reducing water thrust, has avoided the wasting of resources simultaneously, reduces the power station running cost. The pump plate and the sealing structure have decisive effect on the water taking mode of the top cover, on one hand, the axial water thrust can be greatly reduced, on the other hand, stable water taking of technical water supply can be realized, and the improvement on the integral stability of the unit is obviously facilitated.
Disclosure of Invention
The utility model aims at providing a hydraulic turbine runner pump board and seal structure. The technical scheme is as follows: the high-pressure pump is characterized by comprising a pump plate ring plate, pump plate blades, a pump plate seal, a high-pressure cavity, a low-pressure cavity, a top cover plate lower cover plate, a runner upper crown, a pump plate inlet hole, a pump plate outlet hole and a main shaft seal seat.
In the above-mentioned hydraulic turbine runner pump plate and seal structure, the pump plate blades are uniformly distributed by 8-12 blades, and the included angle with the radial central line of the runner crown is 45 °.
Compared with the prior art, the beneficial effects of the utility model are that:
1. in the upper crown flow passage, after the pump plate is inclined, the pumping capacity of the fluid in the low-pressure cavity is enhanced, the water pressure of the low-pressure cavity is reduced, and the axial water thrust of the low-pressure cavity is reduced; the pumping capacity is enhanced to increase the liquid flow in and out of the low-pressure cavity, the fluid speed in the high-pressure cavity sealed by the pump plate is increased, the static pressure in the high-pressure cavity is reduced under the condition of the same total pressure, the axial water thrust in the high-pressure cavity is also reduced, and therefore the total water thrust is reduced.
2. Through 45 oblique pump plates, the pressure difference between the upper crown gap inlet and the water intake is minimum, namely the water taking pressure is highest, the water taking technical water supply requirement is more easily met, and when the leakage amount is increased, the water thrust is reduced along with the increase of the oblique angle of the pump plates.
Principle of operation
The runner pump plate consists of 8-12 pump plate blades and a ring plate which are uniformly distributed in the radial direction, is connected with the runner crown into a whole in a screw connection or welding mode and rotates along with the runner. The outer circle of the ring plate is provided with 8-12 gaps to form a pump plate outlet channel, the pump plate rotates along with the rotating wheel, the speed difference is formed at the inlet and the outlet of the pump plate, the effect of the centrifugal pump is generated, and the water leakage and the silt from the upper crown leak-stopping ring are discharged to the top cover drain pipe and discharged under the action of the pressure and the centrifugal force generated by the pump plate. A low-pressure area is formed at the inlet of the pump, so that the working condition of the main shaft seal is improved.
Drawings
Fig. 1 is a front view of a turbine runner plate and seal structure.
Fig. 2 is a top view of a turbine runner plate and seal structure.
The symbols in the figure illustrate: 1-pump plate ring plate, 2-pump plate blade, 3-pump plate seal, 4-high pressure cavity, 5-low pressure cavity, 6-top cover plate, 7-runner crown, 8-pump plate inlet hole, 9-pump plate outlet hole and 10-main shaft seal seat.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
As shown in fig. 1, the pump plate ring plate is composed of a pump plate ring plate 1, pump plate blades 2, a pump plate seal 3, a high-pressure cavity 4, a low-pressure cavity 5, a top cover lower cover plate 6, a runner upper crown 7, a pump plate inlet hole 8, a pump plate outlet hole 9 and a main shaft seal seat 10, wherein the pump plate blades 2 are welded on the pump plate ring plate 1, the pump plate ring plate 1 is welded on the upper portion of the runner upper crown 7 in a circumferential circle manner, the pump plate inlet hole 8 is machined in the pump plate ring plate 1, the upper portion of the pump plate ring plate 1 and the lower portion of the top cover lower cover plate 6 surround to form the high-pressure cavity 4, the inner circle of the pump plate ring plate 1 surrounds the runner upper crown 7 and the main shaft seal seat 10 to form the low-pressure cavity 5, the pump plate seal 3 is formed by a gap between the main shaft seal seat 10 and the pump plate ring plate 1, and the gap between the outer circle of the pump plate ring plate 1 and the runner upper crown 7 to form the pump plate outlet hole 9.
As shown in figure 2, the pump plate blades 2 are uniformly distributed by 8-12 blades, and the included angle between the blades and the radial center line of the runner crown 7 is 45 degrees.
Finally, the scope of protection of the present invention is not limited to the above-described embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (2)
1. The utility model provides a hydraulic turbine runner pump board and seal structure, characterized by: by pump plate crown plate (1), pump plate blade (2), pump plate seals (3), high pressure chamber (4), low pressure chamber (5), top cap lower cover plate (6), runner crown (7), pump plate inlet hole (8), pump plate outlet hole (9) and main shaft seal receptacle (10) are constituteed, pump plate blade (2) welding is on pump plate crown plate (1), pump plate crown plate (7) upper portion is welded to circumference circle of pump plate crown plate (1), machining has pump plate inlet hole (8) on pump plate crown plate (1), pump plate crown plate (1) upper portion and top cap lower cover plate (6) lower part surround and form high pressure chamber (4), circle and runner crown (7) in pump plate crown plate (1), main shaft seal receptacle (10) surround and form low pressure chamber (5), clearance formation pump plate seals (3) between main shaft seal receptacle (10) and pump plate crown plate (1), the clearance formation pump plate clearance between pump plate crown plate (1) excircle and runner crown plate (7) forms pump clearance (9).
2. The turbine runner plate and seal structure of claim 1, wherein: the pump plate blades (2) are uniformly distributed by 8-12 sheets, and the included angle between the pump plate blades and the radial central line of the runner crown (7) is 45 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222649299.6U CN218266159U (en) | 2022-10-10 | 2022-10-10 | Hydraulic turbine runner pump plate and seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222649299.6U CN218266159U (en) | 2022-10-10 | 2022-10-10 | Hydraulic turbine runner pump plate and seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218266159U true CN218266159U (en) | 2023-01-10 |
Family
ID=84751457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222649299.6U Active CN218266159U (en) | 2022-10-10 | 2022-10-10 | Hydraulic turbine runner pump plate and seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218266159U (en) |
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2022
- 2022-10-10 CN CN202222649299.6U patent/CN218266159U/en active Active
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