CN210370999U

CN210370999U - Water leakage guide structure of water turbine runner discharge opening

Info

Publication number: CN210370999U
Application number: CN201921221458.4U
Authority: CN
Inventors: 刘宇; 刘波尔
Original assignee: Deyang Jinyu Power Equipment Co ltd
Current assignee: Deyang Jinyu Power Equipment Co ltd
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2020-04-21
Anticipated expiration: 2029-07-30

Abstract

The utility model discloses a guide structure that leaks of hydraulic turbine runner outlet belongs to hydraulic turbine runner field, the guide structure that leaks of hydraulic turbine runner outlet. The water leakage guide structure of the water turbine runner water drain hole comprises an upper crown, wherein a water drain cone is fixedly connected to the bottom of the upper crown, the water drain hole is uniformly distributed in an annular shape and is formed in the top of the upper crown, a water guide cover is arranged above the upper crown and corresponds to the water drain hole, the water drain hole is communicated with the water drain cone, and blades are uniformly distributed at the bottom of the upper crown and are fixedly connected to the outer side of the water drain cone. The runner mechanism is formed by the upper crown, the water drainage cone, the blades and the lower ring, and the water guide cover is arranged, so that when the runner rotates, water leakage can be forcibly driven to flow into the water drainage hole along the water guide cover and finally flow to the tail water pipe through the water drainage hole and the water drainage cone, the situation that water leakage is caused by rotation of the runner to generate centrifugation is avoided, the water leakage is difficult to flow out, and the water leakage efficiency is improved.

Description

Water leakage guide structure of water turbine runner discharge opening

Technical Field

The utility model relates to a hydraulic turbine runner field, more specifically say, relate to the guide structure that leaks of hydraulic turbine runner outlet.

Background

The runner (runner of water turbine) is a key component for converting water energy into mechanical energy, and the accuracy of the blade profile is an important factor influencing the efficiency, output, cavitation erosion and operation life of the water turbine, and is an important mark for measuring the manufacturing level of the water turbine.

The water turbine runner is provided with the water drainage hole, water can flow to the draft tube through the water drainage hole due to the pressure difference effect, but water leakage is not easy to flow out due to the centrifugal effect when the runner rotates, and water leakage efficiency is low.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

To the problem that exists among the prior art, the utility model aims to provide a guide structure that leaks of hydraulic turbine runner outlet possesses the efficient advantage of leaking, when having solved hydraulic turbine runner rotation, because centrifugal action, the difficult outflow of leaking leads to the lower problem of efficiency of leaking.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

The water leakage guide structure of the water turbine runner water escape hole comprises an upper crown, wherein a water escape cone is fixedly connected to the bottom of the upper crown, the water escape hole is formed in the top of the upper crown and is uniformly distributed in an annular shape, a water guide cover is arranged above the upper crown and corresponds to the water escape hole, the water escape hole is communicated with the water escape cone, blades are uniformly distributed at the bottom of the upper crown and are fixedly connected to the outer side of the water escape cone, a lower ring is arranged below the upper crown, one side of the upper crown is fixedly connected to the inner side wall of the lower ring and the blades, and a main shaft is arranged at the top of the upper crown.

Preferably, the bottom of the main shaft is fixedly connected with a flange, and the flange is embedded in the top of the upper crown and is fixedly connected with the upper crown.

Preferably, the water guide cover is an arc cover, two screws are arranged above the water guide cover, and two ends of the water guide cover are fixedly connected with the upper crown through the two screws respectively.

Preferably, the drainage hole is obliquely arranged, and the heights of the upper crown are sequentially reduced along the direction of the drainage hole.

Preferably, the drainage cone is a hollow cone, and the size of the top of the drainage cone is the same as that of the tail end of the upper crown.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages of:

(1) this scheme constitutes the runner mechanism through crown, wash-out awl, blade and lower ring, through setting up the water guide cover, when the runner rotates, can powerful drive leak along water guide cover inflow outlet, at last through wash-out outlet and wash-out awl flow direction draft tube, avoids taking place because the rotation of runner causes to leak and takes place centrifugal situation, leads to leaking the difficult outflow of being difficult for, improves the efficiency of leaking.

(2) Through setting up the water guide cover into the arc for the water guide effect is better, through fixing the water guide cover on last guan with the screw, makes the installation and the dismantlement of water guide cover simpler, convenient to use.

(3) The tail end of the water discharge cone and the tail end of the upper crown are completely matched, so that the water discharged from the water discharge hole is guided by the water discharge cone to be more smoothly changed into an axial direction, and the water flow is prevented from rotating and colliding with each other to cause hydraulic loss.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is an enlarged view of a portion a in fig. 2 according to the present invention.

The reference numbers in the figures illustrate:

1. crown forming; 2. a water drainage cone; 3. a water drain hole; 4. a water guide cover; 5. a blade; 6. a lower ring; 7. a main shaft; 8. a flange; 9. and (4) screws.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1-2, a water leakage guiding structure of a water turbine runner drain hole includes an upper crown 1, a drain cone 2 is fixedly connected to the bottom of the upper crown 1, drain holes 3 uniformly distributed in an annular shape are formed in the top of the upper crown 1, a water guide cover 4 is disposed above the upper crown 1 corresponding to the drain holes 3, the drain holes 3 are communicated with the drain cone 2, blades 5 uniformly distributed are fixedly connected to the bottom of the upper crown 1 and located on the outer side of the drain cone 2, the blades 5 are twisted in a complex space and have a wing-shaped cross section, the number of the blades is generally thirteen to eighteen, a lower ring 6 is disposed below the upper crown 1, the lower ring 6 is used for connecting all the blades into a whole to increase the strength and rigidity of the runner, the inner side wall of the lower ring 6 is fixedly connected to one side of the blades 5 away from the upper crown 1, a main shaft 7 is disposed at the top of the upper crown 1, and the drain cone, The blades 5 and the lower ring 6 form a runner mechanism, and by arranging the water guide cover 4, when the runner rotates, water leakage can be forcibly driven to flow into the water drainage hole 3 along the water guide cover 4 and finally flow to the tail water pipe through the water drainage hole 3 and the water drainage cone 2, so that the situation that water leakage is caused by rotation of the runner to generate centrifugation is avoided, the water leakage is difficult to flow out, and the water leakage efficiency is improved.

Further, the bottom of the main shaft 7 is fixedly connected with a flange 8, the flange 8 is embedded at the top of the crown 1 and is fixedly connected with the crown 1, and the main shaft 7 is connected with the crown 1 through the flange 8.

Further, water guide cover 4 is the arc cover, and water guide cover 4 top is provided with two screws 9, and water guide cover 4's both ends are respectively through two screws 9 and last 1 fixed connection of guan, through setting up water guide cover 4 into the arc for the water guide effect is better, fixes water guide cover 4 on last guan 1 through with the screw, makes water guide cover 4's installation and dismantlement simpler, convenient to use.

Furthermore, the weep hole 3 is the slope setting, and the direction height of the upper crown 1 along the weep hole 3 reduces in proper order for the effect of leaking is better.

Furthermore, the drain cone 2 is a cavity cone, the size of the top of the drain cone 2 is the same as the tail end of the upper crown 1, so that the drain cone 2 is completely matched with the upper crown 1, the drain cone 2 has the function of guiding water coming out from the drain hole 5 to be more smoothly changed into an axial direction, and the hydraulic loss caused by the rotation and mutual impact of water flow is avoided.

The working principle is as follows: the runner mechanism is composed of the upper crown 1, the water discharging cone 2, the blades 5 and the lower ring 6, the water guide cover 4 is arranged, when the runner rotates, water leakage can be powerfully driven to flow into the water discharging hole 3 along the water guide cover 4, and finally flows to the tail water pipe through the water discharging hole 3 and the water discharging cone 2, so that the situation that water leakage is generated due to rotation of the runner is avoided, water leakage is not easy to flow out, and the water leakage efficiency is improved.

The above description is only the preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.

Claims

1. Water guide structure that leaks of hydraulic turbine runner outlet, including crown (1), its characterized in that: the bottom fixedly connected with sluicing awl (2) of entablature (1), sluicing hole (3) that are annular evenly distributed is seted up at the top of entablature (1), the top of entablature (1) corresponds sluicing hole (3) and is provided with water guide cover (4), sluicing hole (3) and sluicing awl (2) intercommunication, the bottom of entablature (1) just is located sluicing outside fixedly connected with evenly distributed's of awl (2) blade (5), the below of entablature (1) is provided with lower ring (6), the one side fixed connection of entablature (1) is kept away from with blade (5) to the inside wall of lower ring (6), the top of entablature (1) is provided with main shaft (7).

2. The water leakage guide structure of the turbine runner bleed hole of claim 1, wherein: the bottom of the main shaft (7) is fixedly connected with a flange (8), and the flange (8) is embedded at the top of the upper crown (1) and is fixedly connected with the upper crown (1).

3. The water leakage guide structure of the turbine runner bleed hole of claim 1, wherein: the water guide cover (4) is an arc cover, two screws (9) are arranged above the water guide cover (4), and two ends of the water guide cover (4) are fixedly connected with the upper crown (1) through the two screws (9) respectively.

4. The water leakage guide structure of the turbine runner bleed hole of claim 1, wherein: the drainage holes (3) are obliquely arranged, and the heights of the upper crowns (1) are sequentially reduced along the direction of the drainage holes (3).

5. The water leakage guide structure of the turbine runner bleed hole of claim 1, wherein: the drainage cone (2) is a hollow cone, and the size of the top of the drainage cone (2) is the same as that of the tail end of the upper crown (1).