CN110594201A - Box culvert type bidirectional flow channel internal flow line type vortex eliminating structure and vortex eliminating method thereof - Google Patents
Box culvert type bidirectional flow channel internal flow line type vortex eliminating structure and vortex eliminating method thereof Download PDFInfo
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- CN110594201A CN110594201A CN201911028243.5A CN201911028243A CN110594201A CN 110594201 A CN110594201 A CN 110594201A CN 201911028243 A CN201911028243 A CN 201911028243A CN 110594201 A CN110594201 A CN 110594201A
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- 238000000034 method Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 220
- 230000000694 effects Effects 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 230000008030 elimination Effects 0.000 claims description 4
- 238000003379 elimination reaction Methods 0.000 claims description 4
- 238000010992 reflux Methods 0.000 abstract description 4
- 108091006146 Channels Proteins 0.000 description 32
- 230000008901 benefit Effects 0.000 description 4
- 102000010637 Aquaporins Human genes 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
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- 108010063290 Aquaporins Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/406—Casings; Connections of working fluid especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
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Abstract
The invention relates to a box culvert type bidirectional flow channel internal flow line type vortex eliminating structure and a vortex eliminating method thereof, wherein the box culvert type bidirectional flow channel internal flow line type vortex eliminating structure comprises a box culvert type water inlet flow channel, a box culvert type water outlet flow channel and a horn tube, wherein a streamline vortex eliminating structure is arranged at a horn tube water inlet of the horn tube, and the streamline vortex eliminating structure is tightly connected with the outer edge of the horn tube; the cross section contour line of the streamline vortex-eliminating structure is an arc line, and the circle centers of the inner contour line and the outer contour line of the cross section contour line are the same; the overlooking direction of the streamline vortex-eliminating structure is in a circular shape; a plurality of groups of water permeable holes are uniformly distributed on the surface of the streamline vortex-eliminating structure, and each group is provided with a plurality of water permeable holes. According to the invention, the streamline vortex-eliminating structure is arranged in the box culvert type water inlet runner, so that the internal flow state of the water inlet runner can be obviously improved, the range of a reflux region and the reflux strength in the runner are reduced, and wall-attached vortex of a blind end top plate can be eliminated. The streamline vortex-eliminating structure can effectively improve the flow state in the water inlet runner, weaken the front and back reflux strength of the horn tube and play a role in rectification.
Description
Technical Field
The invention relates to a box culvert type bidirectional flow channel internal flow line type vortex eliminating structure and a vortex eliminating method thereof, belonging to the field of hydraulic engineering and municipal engineering.
Background
The water inlet flow passage is a water inlet building widely applied to large and medium-sized pump stations, is a transition section between a pump station forebay and a water pump impeller chamber, and mainly plays a role in adjusting the flow speed and direction of incoming flow and providing a better water inlet condition for a water pump. The water inlet flow channel has various types, and the box culvert type bidirectional flow channel is a flow channel type which is common in coastal lake areas along the river at present. The box culvert type bidirectional flow passage has a special structure and has bidirectional drainage function. However, due to the special structure of the bidirectional flow channel, under the normal operation condition, the flow channel has a blind end, and the blind end is easy to generate a backflow area, so that the water inlet flow state around the bell mouth is more disordered, the water inlet condition of the water pump is poor, and the water pump efficiency is reduced. Meanwhile, when the water inlet condition is too poor, wall-attached vortexes are formed on the wall surface of the top plate of the water inlet flow channel. The wall-attached vortex has the characteristics of small generation range, fixed position, small harm and the like. However, once the coanda vortex is sucked by the water pump, the performance of the pump device is reduced, the vibration noise is increased, and if the coanda vortex is continuously sucked by the pump, the safety and the stability of the operation of the pump station are seriously influenced.
The water inlet pool and the water inlet runner are both a water inlet building which is connected with the pump station forebay and the water pump impeller chamber. At present, there are many patent measures about vortex elimination in the intake pond, but mainly all be to swirl in the open type intake pond, and it is fresh to have the vortex elimination measure to in the box culvert formula water inlet runner. At present, most of eddy eliminating measures mainly eliminate eddy by breaking the original water body structure, although the eddy eliminating measures can eliminate vortex strips, the optimized adjustment of the flow state in the pump device cannot be guaranteed, even the flow state is possibly more disordered, and the efficiency of the pump device is reduced. Aiming at the problems, the invention adopts a streamline vortex-eliminating structure with the water-permeable holes, and can effectively adjust the water flow state at the bell mouth on the basis of effectively preventing the vortex from entering the pump, thereby improving the operation efficiency and the safety and the stability of the water pump.
Disclosure of Invention
The invention aims to provide a box culvert type bidirectional runner internal flow line type vortex eliminating structure and a vortex eliminating method thereof, which can effectively improve the flow state around a bell mouth in a water inlet runner, optimize the condition of water flowing into a pump and improve the operation efficiency and the safety and stability of the water pump on the basis of solving the problem that a closed box culvert type water inlet runner top plate attaches to a wall vortex to enter the pump.
The box culvert type water inlet runner, the box culvert type water outlet runner, the horn tube and the water pump are included, the box culvert type water outlet runner is arranged on the box culvert type water inlet runner, a top plate and a rear wall are arranged on the box culvert type water inlet runner, the top plate is positioned at the top of the box culvert type water inlet runner, and the top plate separates a cavity between the box culvert type water inlet runner and the box culvert type water outlet runner; the horn pipe is connected with the top plate, the box culvert type water inlet flow channel and the box culvert type water outlet flow channel are communicated through the horn pipe, a horn pipe water inlet and a horn pipe water outlet of the horn pipe are in horn shapes, the horn pipe water inlet of the horn pipe is communicated with the box culvert type water inlet flow channel, and the horn pipe water outlet of the horn pipe is communicated with the box culvert type water outlet flow channel;
a water pump motor is fixed at the top of the box culvert type water outlet flow passage, the water pump is arranged in the flared tube, and a power output shaft of the water pump motor is connected with the water pump;
the method is characterized in that: a streamline vortex-eliminating structure is arranged at the water inlet of the horn pipe and is tightly connected with the outer edge of the horn pipe; the cross section contour line of the streamline vortex-eliminating structure is an arc line, and the circle centers of the inner contour line and the outer contour line of the cross section contour line are the same; the overlooking direction of the streamline vortex-eliminating structure is in a circular shape;
a plurality of groups of water permeable holes are uniformly distributed on the surface of the streamline vortex-eliminating structure, and each group is provided with a plurality of water permeable holes.
The radius R of the inner edge of the streamline vortex-eliminating structure is the same as the radius R0 of the inner edge of the horn tube, and the radius R of the outer edge of the streamline vortex-eliminating structure is 2.1 ~ 2.3.3 times of the radius R0 of the outer edge of the horn tube.
In the streamline vortex-eliminating structure, R1=(1.8~2.2) r0，R2=(1.7~2.1) r0，R3=0.5B ；
Wherein: r1Radius of profile outer contour of streamline vortex-eliminating structure, R2Inner profile radius, R, of streamline vortex-eliminating structure section3The radius of the section fillet of the streamline vortex-eliminating structure is r0, the radius of the inner edge of the horn tube is r0, and the thickness of the horn tube is B.
The surface of the streamline vortex-eliminating structure is uniformly distributed with 12 groups of water-permeable holes, the interval angle alpha =30 degrees of adjacent water-permeable hole groups, the number of single group of water-permeable holes is n, n =6 ~ 8, and the radius of the water-permeable holes is rc，rc= 0.3 ~ 0.5.5B, B being the flare thickness.
A method for eliminating vortex by using a box culvert type bidirectional flow channel internal flow line type vortex eliminating structure is characterized in that:
the water pump motor is started, the water pump is started by the rotation of a power output shaft of the water pump motor, so that water flow enters from a water inlet of the water inlet flow channel, and the water flow channel at the bottom layer can more smoothly enter a horn-shaped pipe water inlet of the horn-shaped pipe under the action of the flow-type vortex eliminating structure and flows to the box culvert type water outlet flow channel through the horn-shaped pipe; the water flow at the middle upper part is blocked by the horn tube, and a part of the water flow returns back, enters the horn tube water inlet of the horn tube more smoothly through the rectification function of the water permeable hole of the streamline vortex-eliminating structure, and flows to the box culvert type water outlet flow passage through the horn tube;
meanwhile, the streamline vortex-eliminating structure breaks the original water body structure, the backflow area is reduced, and meanwhile, the water flow forming backflow can also enter the horn tube through the rectification effect of the water-permeable holes; one part of the water flow bypassing the middle upper part of the horn pipe touches the rear wall of the box culvert type water inlet flow channel and then enters the pump along the streamline vortex eliminating structure, and the other part of the water flow enters the horn pipe through the water permeable hole rectification and flows to the box culvert type water outlet flow channel through the horn pipe;
due to the existence of the streamline vortex-eliminating structure, the original water body structure at the rear wall of the box culvert type water inlet flow channel is broken, the range of a blind end backflow area is reduced, the formation of top plate wall-attached vortex is damaged, and the vortex-eliminating purpose is achieved.
The box culvert type bidirectional flow passage is reasonable and simple in structure, easy to produce and manufacture and convenient to use, and the streamlined vortex eliminating structure is arranged in the box culvert type bidirectional flow passage to solve the problems of wall-attached vortex pump entry, turbulence around a bell mouth and the like. The streamline eddy eliminating structure is closely connected with the outer edge of the horn tube, and the radius r of the inner edge of the streamline eddy eliminating structure and the radius r of the outer edge of the horn tube0The diameter R of the outer edge is 2.0-2.5 times of the radius R of the inner edge, and the thickness of the streamline eddy eliminating structure is the same as that of the horn tube B.
The technical principle is as follows:
according to the analysis of the basic flow state in the box culvert type bidirectional flow channel, water flow enters from the inlet of the water inlet flow channel, and the water flow close to the bottom layer in the water inlet flow channel is sucked by the water pump due to the water suction effect of the water pump. The upper water flow in the water inlet flow channel is blocked by the flared tube, so that a part of water flow can be directly sucked by the pump after returning after contacting the water suction tube, and a part of water flow can form a small backflow area in front of the flared tube and then be sucked by the pump. In addition, a part of water flow bypasses the flared tube and returns back after hitting the rear wall of the blind end of the water inlet flow channel, and a part of the water flow is directly sucked by the pump, and the other part of the water flow is disturbed by the water flow to form backflow and is finally sucked by the pump. Meanwhile, under the non-design working condition, the dead end backflow zone of the box culvert type water inlet runner is more serious, so that the blind end water flow disturbance is larger, wall-attached vortexes are easily formed on the top plate and are sucked by the pump.
By arranging the streamline vortex-eliminating structure in the mode of the figure 2, water flows enter from the water inlet of the water inlet channel, and the water channel at the bottom layer can enter the pump more smoothly under the action of the streamline vortex-eliminating structure. Well upper portion rivers receive the horn tube separation effect, and some rivers are turned back, and the rectification effect through the hole of permeating water of streamlined vortex structure that disappears gets into in the pump more smoothly. Meanwhile, the streamline vortex-eliminating structure breaks through the original water body structure, the backflow area is reduced, and meanwhile, the water flow forming backflow can enter the pump under the rectification effect of the water-permeable holes. One part of water flow bypassing the middle upper part of the horn pipe touches the rear wall and then enters the pump along the streamline vortex eliminating structure, and the other part of water flow enters the pump after being rectified by the water permeable holes. Due to the existence of the streamline vortex-eliminating structure, the original water body structure at the back wall is broken, the range of the blind end backflow area is reduced, the formation of vortex of the top plate wall attachment is destroyed, and the vortex-eliminating purpose is achieved.
Has the advantages that:
the streamline vortex-eliminating structure is arranged in the box culvert type water inlet runner, so that the internal flow state of the water inlet runner can be obviously improved, the range of a backflow area and the backflow strength in the runner are reduced, and the top plate wall-attached vortex can be eliminated. The streamline vortex-eliminating structure can effectively improve the flow state in the water inlet runner, weaken the front and back reflux strength of the horn tube and play a role in rectification. Meanwhile, the occurrence of the coanda vortex can be restrained, the stroke of the coanda vortex is damaged, and the coanda vortex is effectively prevented from being sucked by the pump. The pump station is applied to pump station construction and transformation, can effectively improve pump station operating efficiency, guarantees the high-efficient operation of pump station safety.
According to the box culvert type bidirectional flow passage, the streamline vortex eliminating structure in the box culvert type bidirectional flow passage can improve the problems of flow state disorder and backflow around the bell mouth, and can play a role in blocking and inhibiting the coanda vortex, prevent the coanda vortex from being sucked by a water pump, and improve the efficiency and the operation stability of a pump station. And (3) performing predictive analysis on market implementation possibility and economic benefit:
the Yangtze river box culvert type bidirectional flow channel pump station is widely applied to Yangtze river lake regions, and along with the construction of south-to-north water transfer east line engineering and the implementation of the technical transformation of national large and medium-sized pump stations, the improvement of the flow state in the box culvert type bidirectional flow channel is the key for improving the efficiency and the operation stability of the pump station, so that the pump station can be applied and implemented, and great economic benefits and social benefits are obtained.
Drawings
Fig. 1 is a schematic diagram of the flow state in a box culvert type water inlet channel.
FIG. 2 is a schematic view of the flow state of a box culvert type water inlet runner with a streamline vortex-eliminating structure.
FIG. 3 is a cross-sectional view of a streamlined vortex shedding structure.
FIG. 4 is a top view of a streamlined vortex shedding structure.
In the figure: 1 box culvert type water inlet runner, 2 box culvert type water outlet runner, 3 trumpets, 4 top plates, 5 wall attaching vortexes, 6 streamline vortex eliminating structures, 8 water pumps, 9 rear walls and 10 water permeable holes.
Detailed Description
The invention will be described in detail below with reference to the accompanying drawings.
A box culvert type bidirectional runner internal flow line type vortex eliminating structure comprises a box culvert type water inlet runner 1, a box culvert type water outlet runner 2, a horn tube 3 and a water pump 8, wherein the box culvert type water outlet runner 2 is arranged on the upper side of the box culvert type water inlet runner 1, a top plate 4 and a rear wall 9 are arranged on the box culvert type water inlet runner 1, the top plate 4 is positioned at the top of the box culvert type water inlet runner 1, and the top plate 4 separates a cavity between the box culvert type water inlet runner 1 and the box culvert type water outlet runner 2; the horn tube 3 is installed on the roof 4, link up through the horn tube 3 between box culvert formula water inlet runner 1, the box culvert formula water outlet runner 2, and the horn tube water inlet of horn tube 3, the horn tube delivery port are loudspeaker forms, and the horn tube water inlet of horn tube 3 link up with box culvert formula water inlet runner 1, and the horn tube delivery port of horn tube 3 links up with box culvert formula water outlet runner 2. A water pump motor is fixed on the top of the box culvert type water outlet flow passage 2, a water pump 8 is arranged in the horn tube 3, and a power output shaft of the water pump motor is connected with the water pump 8.
A streamline vortex-eliminating structure 6 is arranged at a horn-shaped pipe water inlet of a horn-shaped pipe 3, the streamline vortex-eliminating structure 6 is tightly connected with the outer edge of the horn-shaped pipe 3, the section contour line of the streamline vortex-eliminating structure 6 is an arc line, the circle centers of an inner contour line and an outer contour line of the section contour line are the same, the streamline vortex-eliminating structure 6 is in a circular ring shape in the overlooking direction, a plurality of groups of water-permeable holes are uniformly distributed on the surface of the streamline vortex-eliminating structure 6, each group is provided with a plurality of water-permeable holes 10, the radius R of the inner edge of the streamline vortex-eliminating structure 6 is the same as the radius R0 of the inner edge of the horn-shaped pipe 3, and the radius R of the outer edge of the streamline vortex-eliminating1=(1.8~2.2) r0，R2=(1.7~2.1) r0，R3=0.5B 。
R1The radius of the outer contour of the section of the streamline vortex-eliminating structure 6, R2The inner profile radius R of the section of the streamline vortex-eliminating structure 63The section of the streamline vortex-eliminating structure 6 is rounded.
The surface of the streamline vortex-eliminating structure 6 is uniformly distributed with 12 groups of water-permeable holes, the interval angle alpha =30 degrees of the adjacent water-permeable hole groups, 10 water-permeable holes in a single group are n, n =6 ~ 8, and the radius of the water-permeable holes 10 is rc，rc= (0.3 ~ 0.5.5) B, B is the flare 3 thickness.
The streamline vortex-eliminating structure can be connected with the bell mouth by adopting precast concrete or a steel structure, and the concrete parameters are as follows:
the cross section of the streamline vortex-eliminating structure is shown in figure 3, the contour line of the cross section of the streamline vortex-eliminating structure is an arc line, and the circle centers of the inner contour line and the outer contour line are the same. The radius of the arc is:
R1(R1=(1.8~2.2) r0 ), R2(R2=(1.7~2.1) r0)，R3(R3=0.5B )。
the top dimension of the streamline vortex-reducing structure is shown in fig. 4, wherein:
inner edge radius r (r = r)0) Outer edge radius R (R1= (2.1 ~ 2.3) R0)。
3. 12 groups of water permeable holes are uniformly distributed on the surface of the streamline vortex-eliminating structure, the interval angle between every two groups of water permeable holes is alpha =30 degrees, the number of the single group of water permeable holes is n (n =6 ~ 8), and the radius r of the water permeable holesc(rc=(0.3~0.5)B)。
4. Wherein B is the thickness of the flare tube, r0Is the inner edge radius of the trumpet tube.
When the water pump is used, the water pump motor is started, the water pump 8 is started by the rotation of the power output shaft of the water pump motor, water flow enters from the water inlet of the water inlet flow channel 1, the water flow channel at the bottom layer can enter the water inlet of the horn pipe 3 more smoothly under the action of the flow-type vortex eliminating structure 6, and flows to the box culvert type water outlet flow channel 2 through the horn pipe 3; well upper portion rivers receive the separation effect of horn pipe 3, and some rivers turn back, and the rectification effect through the hole 10 of permeating water of streamlined vortex structure 6 that disappears smoothly gets into the horn pipe water inlet of horn pipe 3 more, flows to box culvert formula play water flow way 2 through horn pipe 3.
Meanwhile, the streamline vortex-eliminating structure 6 is arranged to break the original water body structure, the backflow area is reduced, and meanwhile, the water flow forming backflow can also enter the horn tube 3 through the rectification function of the water permeable holes 10; and one part of the water flow bypassing the middle upper part of the horn pipe 3 touches the rear wall 9 of the box culvert type water inlet flow channel 1 and then enters the pump along the streamline vortex eliminating 6 structure, and the other part of the water flow is rectified by the water permeable holes 10 and enters the horn pipe 3 and flows to the box culvert type water outlet flow channel 2 through the horn pipe 3.
Due to the existence of the streamline vortex-eliminating structure 6, the original water body structure at the rear wall 9 of the box culvert type water inlet flow passage 1 is broken, the range of a backflow area is reduced, the formation of wall-attached vortexes of the top plate 4 is damaged, and the vortex-eliminating purpose is achieved.
Claims (5)
1. A box culvert type bidirectional runner internal flow line type vortex eliminating structure comprises a box culvert type water inlet runner (1), a box culvert type water outlet runner (2), a horn tube (3) and a water pump (8), wherein the box culvert type water outlet runner (2) is arranged on the box culvert type water inlet runner (1), a top plate (4) and a rear wall (9) are arranged on the box culvert type water inlet runner (1), the top plate (4) is positioned at the top of the box culvert type water inlet runner (1), and a cavity between the box culvert type water inlet runner (1) and the box culvert type water outlet runner (2) is separated by the top plate (4); the horn tube (3) is connected with the top plate (4), the box culvert type water inlet flow channel (1) and the box culvert type water outlet flow channel (2) are communicated through the horn tube (3), a horn tube water inlet and a horn tube water outlet of the horn tube (3) are horn-shaped, the horn tube water inlet of the horn tube (3) is communicated with the box culvert type water inlet flow channel (1), and the horn tube water outlet of the horn tube (3) is communicated with the box culvert type water outlet flow channel (2);
a water pump motor is fixed at the top of the box culvert type water outlet flow passage (2), the water pump (8) is arranged in the horn tube (3), and a power output shaft of the water pump motor is connected with the water pump (8);
the method is characterized in that: a streamline vortex-eliminating structure (6) is arranged at a horn-tube water inlet of the horn tube (3), and the streamline vortex-eliminating structure (6) is tightly connected with the outer edge of the horn tube (3); the cross section contour line of the streamline vortex-eliminating structure (6) is a circular arc line, and the circle centers of an inner contour line and an outer contour line of the cross section contour line are the same; the overlooking direction of the streamline vortex-eliminating structure (6) is in a circular ring shape;
a plurality of groups of water permeable holes are uniformly distributed on the surface of the streamline vortex eliminating structure (6), and each group is provided with a plurality of water permeable holes (10).
2. The box culvert type bidirectional flow channel internal flow line type vortex breaking structure according to claim 1, wherein the radius R of the inner edge of the streamline type vortex breaking structure (6) is the same as the radius R0 of the inner edge of the trumpet tube (3), and the radius R of the outer edge of the streamline type vortex breaking structure (6) is 2.1 ~ 2.3.3 times of the radius R0 of the outer edge of the trumpet tube (3).
3. The box culvert type bidirectional flow channel internal flow line type vortex eliminating structure according to claim 1, characterized in that: in the streamline vortex-eliminating structure (6), R1=(1.8~2.2) r0，R2=(1.7~2.1) r0，R3=0.5B ；
Wherein: r1Is a streamline vortex-eliminating structure (6) with the profile outer contour radius R2The inner contour radius R of the section of the streamline vortex-eliminating structure (6)3The radius of the section fillet of the streamline eddy eliminating structure (6) is r0, the radius of the inner edge of the trumpet tube (3) is r, and the thickness of the trumpet tube (3) is B.
4. The box culvert type bidirectional flow channel internal flow line type vortex breaking structure according to claim 1, characterized in that 12 groups of water permeable holes are uniformly distributed on the surface of the streamline type vortex breaking structure (6), the interval angle of the adjacent water permeable hole groups is alpha =30 degrees, the number of the single group of water permeable holes (10) is n, n =6 ~ 8, and the radius of the water permeable holes (10) is rc，rc= (0.3 ~ 0.5.5) B, B is the flare (3) thickness.
5. The method for carrying out vortex elimination on the box culvert type bidirectional flow channel internal flow line type vortex elimination structure according to any one of claims 1 to 4, wherein the method comprises the following steps:
a water pump motor is started, a water pump (8) is started by rotation of a power output shaft of the water pump motor, water flow enters from a water inlet of the water inlet runner (1), and the water flow at the bottom layer can more smoothly enter a horn-shaped pipe water inlet of the horn-shaped pipe (3) under the action of the streamline-type vortex eliminating structure (6) and flows to the box culvert-type water outlet runner (2) through the horn-shaped pipe (3); the water flow at the middle upper part is blocked by the horn pipe (3), a part of the water flow returns, enters the horn pipe water inlet of the horn pipe (3) more smoothly through the rectification function of the water permeable hole (10) of the streamline vortex-eliminating structure (6), and flows to the box culvert type water outlet flow passage (2) through the horn pipe (3);
meanwhile, the streamline vortex-eliminating structure (6) breaks the original water body structure, the backflow area is reduced, and meanwhile, the water flow forming backflow can enter the horn tube (3) through the rectification effect of the water-permeable holes (10); one part of the water flow bypassing the bell pipe (3) at the middle upper part touches the rear wall (9) of the box culvert type water inlet flow channel (1) and then enters the pump along the streamline vortex eliminating structure (6), and the other part of the water flow is rectified by the water permeable hole (10) to enter the bell pipe (3) and flows to the box culvert type water outlet flow channel (2) through the bell pipe (3);
due to the existence of the streamline vortex-eliminating structure (6), the original water body structure at the rear wall (9) of the box culvert type water inlet runner (1) is broken, the range of a backflow area is reduced, the formation of wall-attached vortexes of the top plate (4) is destroyed, and the vortex-eliminating purpose is achieved.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116201085A (en) * | 2023-04-27 | 2023-06-02 | 江苏沙河抽水蓄能发电有限公司 | Water inlet and outlet joint vortex eliminating device of pumped storage power station |
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| CN210769572U (en) * | 2019-10-28 | 2020-06-16 | 江苏省水利工程科技咨询股份有限公司 | Box culvert type bidirectional flow channel internal flow line type vortex eliminating structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116201085A (en) * | 2023-04-27 | 2023-06-02 | 江苏沙河抽水蓄能发电有限公司 | Water inlet and outlet joint vortex eliminating device of pumped storage power station |
| CN116201085B (en) * | 2023-04-27 | 2023-07-07 | 江苏沙河抽水蓄能发电有限公司 | Water inlet and outlet joint vortex eliminating device of pumped storage power station |
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