CN210599262U

CN210599262U - Mixed-flow water turbine air supplement system

Info

Publication number: CN210599262U
Application number: CN201921060732.4U
Authority: CN
Inventors: 蔡丹枫
Original assignee: HANGZHOU RESOURCE POWER EQUIPMENT CO Ltd
Current assignee: HANGZHOU RESOURCE POWER EQUIPMENT CO Ltd
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2020-05-22
Anticipated expiration: 2029-07-09

Abstract

The utility model relates to a francis turbine air supplement system, the hydraulic turbine equipment technical field that belongs to, including the water guide base, be equipped with the runner on the water guide base, be equipped with the hydraulic turbine main shaft on the runner, hydraulic turbine main shaft periphery is equipped with the hydraulic turbine shell, be equipped with a plurality of water guide control framves between hydraulic turbine shell and hydraulic turbine main shaft, be equipped with the sealed sheath of main shaft between water guide control frame and hydraulic turbine main shaft, the sealed sheath of main shaft and runner looks inlay card formula bolted connection, the sealed sheath of main shaft upper end is equipped with the main shaft bearing frame, be equipped with the mixed flow entry that is loop configuration in the water guide base, be equipped with a plurality of stator that sell shaft type and cup joint mutually with the water guide control frame on the mixed flow entry, water. The vibration damping device has the characteristics of good vibration damping effect, strong operation stability, good filling effect and long service cycle. The safe, stable and efficient operation of the power station is ensured, and the economic benefit of the power station is improved.

Description

Mixed-flow water turbine air supplement system

Technical Field

The utility model relates to a hydraulic turbine equipment technical field, concretely relates to francis hydraulic turbine air supplement system.

Background

When the water turbine operates under the non-optimal working condition, the outlet water flow flows in a non-normal direction, a vortex band and pressure pulsation occur in the draft tube, and the vortex band is disturbed violently, so that the unit generates cavitation vibration. When cavitation erosion of the hollow cavity of the draft tube is serious, even power swing and low-frequency vertical vibration of a unit occur, and meanwhile, cavitation erosion is also aggravated. When the unit is stopped, the runner chamber is vacuumized due to the inertia of water flow. When the vacuum can not be destroyed, the tail water flows back, so that the force of the backflow water is generated, and the machine lifting phenomenon can occur in serious conditions. In order to improve the poor working condition, reduce cavitation damage and reduce vibration, a proper amount of air needs to be supplemented by arranging an air supplementing system so as to reduce the vibration of the unit and improve the running state of the water turbine.

Disclosure of Invention

The utility model discloses mainly solve and have among the prior art vibration big, resistant cavitation erosion performance poor, the poor and short not enough of life of operational stability, provide a francis turbine air supplement system, have the characteristics that the damping is effectual, the operational stability is strong, the benefit is good and the life cycle is long. The safe, stable and efficient operation of the power station is ensured, and the economic benefit of the power station is improved.

The above technical problem of the present invention can be solved by the following technical solutions:

a mixed flow type water turbine air supplement system comprises a water guide base, wherein a runner which is fixedly connected with the water guide base through an embedded bolt is arranged on the water guide base, a water turbine main shaft which is fixedly connected with the runner through a flange is arranged on the runner, a water turbine shell which is integrally welded with the end surface of the water guide base is arranged on the periphery of the water turbine main shaft, a plurality of water guide control frames which are fixedly connected with the inner wall of the water turbine shell through bolts are arranged between the water turbine shell and the water turbine main shaft, a main shaft sealing sheath which is in sealed sleeve joint with the water turbine main shaft is arranged between the water guide control frames and the water turbine main shaft, the main shaft sealing sheath is connected with the runner through the embedded bolt, a main shaft bearing seat which is connected with the water guide control frames through bolts is arranged at the upper end of the main shaft sealing sheath, and a mixed flow inlet which is in an annular structure is arranged, the mixed flow inlet is provided with a plurality of guide vanes which are sleeved with the water guide control frame in a pin shaft mode, and the lower end of the water guide base is provided with a draft tube communicated with the mixed flow inlet.

The guide vane is one of the most important casting and forging pieces of the francis turbine air supply system. The guide vane is the energy conversion device of the water turbine, and the function of the guide vane is to collect the liquid thrown out by the impeller, reduce the flow velocity of the liquid, convert part of velocity energy head into pressure energy head, and then uniformly introduce the pressure energy head into the next stage or discharge the pressure energy head through the diffusion pipe. The guide vanes are mostly used in the backflow situation in hydraulic machines, like movable guide vanes, fixed guide vanes of water turbines, and guide vanes in water pumps, all for generating the circulation.

Preferably, the main shaft of the water turbine comprises a main shaft body, a main shaft flange integrated with the main shaft body is arranged at the lower end of the main shaft body, and a plurality of air supply holes distributed annularly at equal intervals are formed in the main shaft flange. The air supplementing hole enables the runner to be communicated with the water turbine air supplementing pipe assembly, and avoids the phenomenon that the runner chamber forms a vacuum state due to the inertia effect of water flow when the unit is stopped. The vibration of the unit is reduced, and the running state of the water turbine is improved.

Preferably, the main shaft sealing sheath is provided with a water turbine air supplement pipe assembly which is communicated with the air supplement hole and extends out of the water turbine shell.

Preferably, the water turbine air supplement pipe assembly comprises a plurality of air supplement connecting flange pipes, a double 90-degree air supplement flange bent pipe is arranged between two adjacent air supplement connecting flange pipes, and a 90-degree air supplement welding elbow which is fixedly connected with the main shaft sealing sheath in a penetrating and sleeved mode is arranged between the air supplement connecting flange pipes and the main shaft sealing sheath.

Preferably, the end of the air supply connecting flange pipe, which extends out of the water turbine shell, is provided with an air supply valve which is fixedly connected with the air supply connecting flange pipe through a flange. The gulp valve is the ball valve structure of application on hydraulic turbine gulp pipe subassembly, realizes the switching process of admitting air to hydraulic turbine gulp pipe subassembly.

Preferably, the gas supplementing holes are inclined at an angle of 30-60 degrees.

The utility model discloses can reach following effect:

the utility model provides a francis turbine air supplement system compares with prior art, has that the damping is effectual, operating stability is strong, mend the characteristics that good and the life cycle of neat effect is long. The safe, stable and efficient operation of the power station is ensured, and the economic benefit of the power station is improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a structural sectional view of the main shaft of the water turbine of the present invention.

Fig. 3 is a schematic structural view of a water turbine air supply pipe assembly of the present invention.

In the figure: the water turbine comprises a water turbine main shaft 1, a main shaft bearing seat 2, a main shaft sealing sheath 3, a water guide control frame 4, a water turbine shell 5, a water turbine air supplement pipe assembly 6, a rotating wheel 7, a water guide base 8, a mixed flow inlet 9, a guide vane 10, a tail water pipe 11, a main shaft body 12, a main shaft flange 13, an air supplement hole 14, a 90-degree air supplement welding elbow 15, an air supplement connecting flange pipe 16, a double 90-degree air supplement flange elbow 17 and an air supplement valve 18.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example (b): as shown in fig. 1, 2 and 3, the mixed-flow water turbine air supplement system comprises a water guide base 8, a runner 7 fixedly connected with the water guide base 8 through a clamping bolt is arranged on the water guide base 8, a water turbine main shaft 1 fixedly connected with the runner 7 through a flange is arranged on the runner 7, the water turbine main shaft 1 comprises a main shaft body 12, a main shaft flange 13 integrated with the main shaft body 12 is arranged at the lower end of the main shaft body 12, and 8 air supplement holes 14 distributed in an equally-spaced annular mode are formed in the main shaft flange 13. The air supply holes 14 are inclined at an angle of 45 degrees. The main shaft sealing sheath 3 is provided with a water turbine air supply pipe assembly 6 which is communicated with the air supply hole 14 and extends out of the water turbine shell 5. The water turbine air supply pipe assembly 6 comprises 2 air supply connecting flange pipes 16, a double 90-degree air supply flange bent pipe 17 is arranged between every two adjacent air supply connecting flange pipes 16, and a 90-degree air supply welding elbow 15 which is fixedly connected with the main shaft sealing sheath 3 in a penetrating and sleeved mode is arranged between each two adjacent air supply connecting flange pipes 16 and the main shaft sealing sheath 3. The end of the air supply connecting flange pipe 16 extending out of the water turbine shell 5 is provided with an air supply valve 18 which is fixedly connected with the air supply connecting flange pipe 16 through flanges. The periphery of a water turbine main shaft 1 is provided with a water turbine shell 5 integrally welded with the end face of a water guide base 8, 16 water guide control frames 4 fixedly connected with the inner wall of the water turbine shell 5 through bolts are arranged between the water turbine shell 5 and the water turbine main shaft 1, a main shaft sealing sheath 3 in sealing sleeve joint with the water turbine main shaft 1 is arranged between the water guide control frames 4 and the water turbine main shaft 1, the main shaft sealing sheath 3 is in clamping embedded bolt connection with a rotating wheel 7, the upper end of the main shaft sealing sheath 3 is provided with a main shaft bearing seat 2 in bolt connection with the water guide control frames 4, a mixed flow inlet 9 in an annular structure is arranged in the water guide base 8, 16 guide vanes 10 which are distributed in an equally-spaced annular shape and are in pin shaft type sleeve joint with the water guide control frames 4 are arranged on the mixed flow inlet 9, and the lower end of the water guide base 8 is.

To sum up, the mixed-flow water turbine air supplementing system has the characteristics of good vibration reduction effect, strong operation stability, good supplementing effect and long service cycle. The safe, stable and efficient operation of the power station is ensured, and the economic benefit of the power station is improved.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without deviating from the basic characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

In conclusion, the above description is only the specific embodiment of the present invention, but the structural features of the present invention are not limited thereto, and any person skilled in the art can make changes or modifications within the scope of the present invention.

Claims

1. The utility model provides a francis turbine air supplement system which characterized in that: the water guide device comprises a water guide base (8), wherein a runner (7) fixedly connected with the water guide base (8) through an embedded bolt is arranged on the water guide base (8), a water turbine spindle (1) fixedly connected with the runner (7) through a flange is arranged on the runner (7), a water turbine shell (5) integrally welded with the end face of the water guide base (8) is arranged on the periphery of the water turbine spindle (1), a plurality of water guide control frames (4) fixedly connected with the inner wall of the water turbine shell (5) through bolts are arranged between the water turbine shell (5) and the water turbine spindle (1), a spindle bearing seat (3) in sealed sleeve joint with the water turbine spindle (1) is arranged between the water guide control frames (4) and the water turbine spindle (1), the spindle sealing sheath (3) is connected with the runner (7) through an embedded bolt, and a spindle bearing seat in bolted joint with the water guide control frame (4) is arranged at the upper end of the spindle sealing sheath (3) (2) The water guide base (8) is internally provided with a mixed flow inlet (9) in an annular structure, the mixed flow inlet (9) is provided with a plurality of guide vanes (10) which are sleeved with the water guide control frame (4) in a pin shaft manner, and the lower end of the water guide base (8) is provided with a tail water pipe (11) communicated with the mixed flow inlet (9).

2. The francis turbine air supplement system of claim 1, wherein: the water turbine main shaft (1) comprises a main shaft body (12), a main shaft flange (13) which is integrated with the main shaft body (12) is arranged at the lower end of the main shaft body (12), and a plurality of air supply holes (14) which are distributed in an equidistant annular mode are formed in the main shaft flange (13).

3. The francis turbine air supplement system of claim 2, wherein: the main shaft sealing sheath (3) is provided with a water turbine air supplement pipe assembly (6) which is communicated with the air supplement hole (14) and extends out of the water turbine shell (5).

4. The francis turbine air supplement system of claim 3, wherein: the water turbine air supplement pipe assembly (6) comprises a plurality of air supplement connecting flange pipes (16), a double 90-degree air supplement flange bent pipe (17) is arranged between two adjacent air supplement connecting flange pipes (16), and a 90-degree air supplement welding elbow (15) which is connected and fixed with the main shaft sealing sheath (3) in a sleeved mode is arranged between the air supplement connecting flange pipes (16) and the main shaft sealing sheath (3).

5. The francis turbine air supplement system of claim 4, wherein: and an air supply valve (18) fixedly connected with the air supply connecting flange pipe (16) in a flange way is arranged at the end of the air supply connecting flange pipe (16) extending out of the water turbine shell (5).

6. The francis turbine air supplement system of claim 2, wherein: the air supply holes (14) are inclined at an angle of 30-60 degrees.