Floating-type counter-rotating vortex elimination apparatus for pump station, and pump station

Abstract

The present invention provides a floating-type counter-rotating vortex elimination apparatus for a pump station, and a pump station. The floating-type counter-rotating vortex elimination apparatus comprises a floating-type driving disc, a counter-rotating gearbox, a reverse rotating disc, a plane bearing, an elastic element, and a counterweight; the floating-type driving disc floats on a liquid level near the water suction end of a pump station, and is driven to rotate by means of power generated by a vortex; the floating-type driving disc is connected to the reverse rotating disc by means of the counter-rotating gearbox, so that the rotating directions of the reverse rotating disc and the floating-type driving disc are different; the plane bearing is mounted at the bottom of the reverse rotating disc; the plane bearing is connected to the counterweight by means of the elastic element and is used for preventing inclination. The present invention can generate a reaction force to counteract vortexes, and weaken or eliminate free liquid level vortexes, and thus provide more uniform incoming flow for a large water pump.

Description

Pump station floating counter-rotating vortex elimination device and pump station Technical Field

[0001] The present invention relates to the technical field of fluid machinery, and in particular to a pump station floating counter-rotating vortex elimination device and a pump station. Background Art

[0002] The pump station forebay or pump station inlet sump is a flow component that provides uniform flow for large water pumps. It is a hydraulic structure that directly draws water from the water supply pump or suction pipe. It is often used in conjunction with large-flow axial (mixed) flow pumps for flood control and drought relief, industrial and agricultural water use, and cooling systems for large power plants or nuclear power plants. There are various vortices in the flow under different operating conditions inside the pump station inlet sump. Depending on the induced location, they can be divided into free surface vortices and submerged vortices. These highly unstable vortices can affect the flow pattern at the pump suction port, causing uneven distribution of impeller loads, affecting operating efficiency, and even causing pump cavitation, noise and vibration. In severe cases, the pump cannot operate normally. Research has shown that a reasonable de-vortexing and vortex elimination device can stabilize the flow pattern in the inlet sump, provide uniform flow for large water pumps, and contribute to the efficient and stable operation of the pump.

[0003] Currently, domestic patents for vortex elimination devices in pump station forebays primarily focus on the design of vortex-eliminating hydraulic structures. Existing technology discloses a floating vortex elimination device, which grooves the wall of the inlet pool and installs floats. The floats prevent vortex formation through contact with the water surface, but this solution is costly to build and maintain, inflexible to use, and less practical for large pump station forebays. Existing technology discloses a floating net vortex elimination method, which installs a vortex-eliminating float net on the surface of the inlet pool to specifically eliminate vortices. However, this solution is affected by the size of the float net mesh. A mesh that is too small will cause severe hydraulic loss, while a mesh that is too large will produce vortices smaller than the mesh size. Furthermore, when the water level inside the inlet pool changes, the float net needs to be reinstalled according to the water level, which is time-consuming and labor-intensive, and significantly increases maintenance costs.

[0004] Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a floating counter-rotating vortex elimination device for a pump station and a pump station. When a vortex is generated on the water surface, the floating device moves to the vortex under the traction of the water flow. The driving disk rotates in the same direction as the vortex and drives the reversing blades to rotate in the opposite direction, generating a reaction force to offset the vortex, weakening or eliminating the free liquid surface vortex, and providing a more uniform incoming flow for large water pumps.

[0006] The present invention achieves the above technical objectives through the following technical means.

[0007] A floating counter-rotating vortex elimination device for a pump station comprises a floating drive disc, a counter-rotating gearbox, a reversing disc, a planar bearing, an elastic element, and a counterweight; the floating drive disc floats on the liquid surface near the suction end of the pump station, and the power generated by the vortex drives the floating drive disc to rotate; the floating drive disc is connected to the reversing disc via the counter-rotating gearbox, so that the reversing disc and the floating drive disc have different rotation directions; a planar bearing is installed at the bottom of the reversing disc, and the planar bearing is connected to the counterweight via the elastic element to prevent tilting.

[0008] Furthermore, the floating drive disk includes drive blades, a buoyancy disk, a drive disk hub, a drive shaft and a drive bevel gear; a plurality of drive blades are evenly distributed between the buoyancy disk and the drive disk hub, the upper end of the drive shaft is connected to the drive disk hub, and the lower end of the drive shaft is connected to the drive bevel gear. The power generated by the vortex is applied to the drive blades to make the floating drive disk and the vortex rotate in the same direction.

[0009] Furthermore, the cross-sectional shape of the driving blade is a quarter of a circular ring, the driving blades are distributed radially and have the same thickness, the inlet and outlet of the driving blades are respectively rounded, and the number of the driving blades is 3-6.

[0010] Furthermore, the outer contour of the buoyancy disk is a circular stretched body, the inner diameter of the buoyancy disk is R1, the outer diameter of the buoyancy disk is R2, the height of the buoyancy disk is H, the interior thereof is a cavity, and the volume of the buoyancy disk satisfies the following conditions:

[0011] Where ρ is the density of water; M is the total mass of the floating counter-rotating vortex elimination device of the pumping station; and k is the buoyancy coefficient.

[0012] Furthermore, the reversing disk includes a reversing blade, a reversing disk hub, a reversing shaft and a reversing bevel gear; the inner edge of the reversing blade is connected to the reversing disk hub; the upper end of the reversing shaft is connected to the counter-rotating gear box, and the lower end of the reversing shaft is connected to the reversing disk hub, and the reversing disk rotates in the opposite direction to the vortex.

[0013] Furthermore, the ratio of the outer diameter r1 of the reversing blade to the outer diameter R1 of the driving blade is generally 0.6 to 0.8; the cross-sectional shape of the reversing blade is rectangular, the height of the reversing blade is h, and the width of the reversing blade is w, satisfying the following conditions: h≥H and h≥2w.

[0014] Furthermore, two transmission bevel gears are coaxially installed in the horizontal direction inside the counter-rotating gearbox, and a driving bevel gear and a reverse bevel gear are coaxially installed in the vertical direction inside the counter-rotating gearbox; the two transmission bevel gears are respectively engaged with the driving bevel gear; the two transmission bevel gears are respectively engaged with the reverse bevel gear; the driving bevel gear drives the reverse bevel gear to rotate in the opposite direction through the two transmission bevel gears.

[0015] Furthermore, the mass m of the counterweight satisfies the following condition: m≥0.3M, where M is the total mass of the floating counter-rotating vortex elimination device of the pump station.

[0016] Furthermore, a traction rope is connected between the water suction end of the pump station and the counterweight; the connection point between the traction rope and the water suction end of the pump station is located at a midpoint between the liquid surface and the inlet of the water suction end; the length L of the traction rope satisfies the following conditions: (Tt)≥L≥0.8(Tt);

[0017] Where Tt is the vertical distance between the liquid surface and the water suction inlet.

[0018] A pump station comprises at least two of the above-mentioned floating counter-rotating vortex elimination devices, wherein the first floating counter-rotating vortex elimination device of the pump station is located on one side of the liquid surface near the water suction end of the pump station; the second floating counter-rotating vortex elimination device of the pump station is located on the other side of the liquid surface near the water suction end of the pump station; the driving directions of the driving blades of the first floating counter-rotating vortex elimination device of the pump station and the driving directions of the driving blades of the second floating counter-rotating vortex elimination device of the pump station are different; the first floating counter-rotating vortex elimination device of the pump station is used to eliminate the vortex on the liquid surface in the clockwise direction; the second floating counter-rotating vortex elimination device of the pump station is used to eliminate the vortex on the liquid surface in the counterclockwise direction.

[0019] The beneficial effects of the present invention are:

[0020] 1. The floating counter-rotating vortex elimination device for a pump station described in this invention generates buoyancy greater than the total mass of the device, ensuring that the device floats on the water surface. When a vortex forms on the liquid surface, the device, under the force of the liquid flow, can be suspended and moved to the vortex to perform targeted vortex elimination and suppression. Under the influence of the vortex, the driving blades rotate in the same direction as the vortex, and the counter-rotating gearbox causes the counter-rotating blades to produce a reverse rotation speed, thereby generating a reverse flow locally on the counter-rotating blades, offsetting the liquid surface vortex and suppressing its downward development.

[0021] 2. The floating counter-rotating vortex elimination device for a pump station described in the present invention has a spring and a counterweight that stabilize the floating device due to the large wave fluctuations on the water surface of a large pump station. In addition, the weight of the counterweight generally exceeds 30% of the overall weight of the floating device. Even if the floating device tilts or flips, the counterweight can rely on its own gravity to restore the floating device to a vertical position.

[0022] 3. The floating counter-rotating vortex elimination device for pump stations described herein prevents the floating device from drifting away from the suction pipe when there are no vortices or weak vortices on the pump station water surface. The towline length is designed with maximum and minimum values. The maximum length prevents the floating device from colliding with pump blades after entering the suction pipe under extreme operating conditions, while the minimum length ensures that the floating device remains afloat.

[0023] 4. The pump station described in the present invention is equipped with at least two of the above-mentioned floating counter-rotating vortex elimination devices of the pump station, and the driving directions of the driving blades of the first pump station floating counter-rotating vortex elimination device and the second pump station floating counter-rotating vortex elimination device are different; the first pump station floating counter-rotating vortex elimination device is used to eliminate the vortex on the liquid surface in the clockwise direction; the second pump station floating counter-rotating vortex elimination device is used to eliminate the vortex on the liquid surface in the counterclockwise direction; and the driving blades of the first pump station floating counter-rotating vortex elimination device are Type I blades, and the Type I blades are installed on the left side of the water suction end of the pump station (if the right-hand screw rule is adopted at this time, the liquid surface vortex rotates counterclockwise); the driving blades of the second pump station floating counter-rotating vortex elimination device are Type II blades, and the Type II blades are installed on the right side of the water suction end of the pump station (if the right-hand screw rule is adopted at this time, the liquid surface vortex rotates counterclockwise); the purpose is to make the liquid surface vortex move along the driving blades and guide it upwards, thereby hindering the downward movement of the vortex and generating air entrainment. The cross section of the reverse blades is rectangular and the blades are distributed radially, which can maximize the effect of stirring and vortex creation and offset the vortex on the liquid surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. The drawings described below are some embodiments of the present invention. For ordinary technicians in this field, it is obvious that other drawings can be obtained based on these drawings without paying any creative work.

[0025] FIG1 is a schematic diagram of the installation of the floating counter-rotating vortex elimination device of the pump station according to the present invention.

[0026] FIG2 is a structural diagram of the floating counter-rotating vortex elimination device of the pump station according to the present invention.

[0027] FIG3 is a schematic diagram showing an I-shaped driving blade of the floating driving disk according to the present invention.

[0028] FIG4 is a schematic diagram of a floating drive disk according to the present invention having a drive blade of type II.

[0029] FIG5 is a cross-sectional view of the floating drive disc according to the present invention.

[0030] FIG6 is a schematic diagram of a counter-rotating gearbox according to the present invention.

[0031] FIG7 is a schematic diagram of the reversal disk according to the present invention.

[0032] Figure 8 is a liquid level simulation diagram of the floating counter-rotating vortex elimination device without the pump station installed.

[0033] Figure 9 is a liquid level simulation diagram of the installation of the floating counter-rotating vortex elimination device of the pump station.

[0034] In the figure: 1- floating drive disc; 11- drive blade; 12- buoyancy disc; 13- drive disc hub; 14- drive shaft; 15- drive bevel gear; 2- counter-rotating gearbox; 21- box cover; 22- transmission bevel gear; 23- rolling bearing; 3- reversing disc; 31- reversing blade; 32- reversing disc hub; 33- reversing shaft; 34- reversing bevel gear; 4- plane bearing; 5- spring; 6- counterweight; 7- traction rope; 8- suction pipe; 9- liquid level; 10- bottom of forebay. DETAILED DESCRIPTION

[0035] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "axial", "radial", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0038] As shown in Figures 1 and 2, the suction pipe 8 is typically installed at the pump inlet, i.e., the pump station's suction end. When the pump is operating, the liquid flows in the direction shown in the figure. When the flow rate is high or the water level at horizontal plane 9 is low, vortices often form at horizontal plane 9. These vortices enter the suction pipe 8 along with the liquid flow, affecting the pump's efficiency and stability. As the vortex strength increases, it can even cause the vortex to entrain air into the flow, significantly reducing the pump's efficiency and stability. The floating, counter-rotating vortex elimination device for a pump station described herein comprises a floating drive disc 1, a counter-rotating gearbox 2, a counter-rotating disc 3, a plane bearing 4, a spring 5, and a counterweight 6. The floating drive disc 1 floats on the liquid surface near the pump station's suction end. The power generated by the vortex drives the floating drive disc 1 to rotate. The floating drive disc 1 ensures that the entire device floats on the water surface and, under the action of the vortex, maintains the same rotational direction as the vortex. The floating drive disc 1 is connected to the counter-rotating disc 3 via the counter-rotating gearbox 2. The counter-rotating gearbox 2 ensures that the counter-rotating disc 3 and the floating drive disc 1 rotate at the same speed but in opposite directions. A flat bearing 4 is mounted on the bottom of the reversing disk 3. This bearing 4 is connected to a counterweight 6 via a spring 5 to prevent tilting. The lower end of the flat bearing 4 is connected to the spring 5, which keeps the reversing disk 3 stationary as it rotates. The lower end of the spring 5 is connected to the counterweight 6. When the liquid level 9 fluctuates, the spring 5 and counterweight 6 stabilize the floating device. Furthermore, if the floating device tilts or flips, the counterweight 6, through its own weight, can restore the floating device to an upright position.

[0039] As shown in Figure 5, the floating drive disc 1 includes drive blades 11, a buoyancy disc 12, a drive disc hub 13, a drive shaft 14, and a drive bevel gear 15. Several drive blades 11 are evenly distributed between the buoyancy disc 12 and the drive disc hub 13. The upper end of the drive shaft 14 is connected to the drive disc hub 13, and the lower end of the drive shaft 14 is connected to the drive bevel gear 15. The power generated by the vortex is applied to the drive blades 11, which is used to align the rotation direction of the floating drive disc 1 with the vortex. The cross-sectional shape of the drive blades 11 is a quarter of a circular ring. The drive blades 11 are radially distributed and have the same thickness. The inlet and outlet of the drive blades 11 are rounded and transitioned. The number of drive blades 11 ranges from 3 to 6. As shown in Figure 3, the AA cross-sectional shape of the drive blades 11 is classified as Type I, with a Type I drive blade cross-sectional shape of a quarter of a circular ring and located in the fourth quadrant. As shown in Figure 4, the BB cross-sectional shape of the drive blades 11 is classified as Type II, with a Type II drive blade cross-sectional shape of a quarter of a circular ring and located in the third quadrant. When the viewing angle is along the direction of liquid flow, according to the right-hand screw rule, the axis of the vortex generated on the left side of the suction pipe 8 is vertically downward, and a type I drive blade is installed; when the axis of the vortex generated on the right side of the suction pipe 8 is vertically upward, a type II drive blade is installed. This ensures that the rotating liquid flow moves along the drive blade 11 and is guided upward, preventing the vortex from sinking and causing air entrainment.

[0040] The outer contour of the buoyancy disk 12 is a circular stretched body, the inner diameter of the buoyancy disk 12 is R1, the outer diameter of the buoyancy disk 12 is R2, the height of the buoyancy disk 12 is H, and the interior thereof is a cavity. The volume of the buoyancy disk 12 satisfies the following conditions:

[0041] Where ρ is the density of water; M is the total mass of the floating counter-rotating vortex elimination device of the pump station; k is the buoyancy coefficient, which is usually 0.5-0.8.

[0042] In the embodiment, the outer contour of the buoyancy disk 12 is a tubular structure with an inner diameter of R1, an outer diameter of R2, and a height of H. The interior is a cavity. The buoyancy generated by the buoyancy disk 12 should be at least greater than the total mass of the vortex elimination device. For example, if the value of k is 0.5, the maximum buoyancy generated when the buoyancy disk is completely immersed in water is 2M.

[0043] As shown in Figure 6, two transmission bevel gears 22 are coaxially installed in the horizontal direction inside the counter-rotating gearbox 2, and a driving bevel gear 15 and a reversing bevel gear 34 are coaxially installed in the vertical direction inside the counter-rotating gearbox 2; the two transmission bevel gears 22 are respectively engaged with the driving bevel gear 15; the two transmission bevel gears 22 are respectively engaged with the reversing bevel gear 34; the driving bevel gear 15 drives the reversing bevel gear 34 to rotate in the opposite direction through the two transmission bevel gears 22.

[0044] As shown in Figure 7, the reversing disk 3 includes reversing blades 31, a reversing disk hub 32, a reversing shaft 33, and a reversing bevel gear 34. The inner edge of the reversing blade 31 is connected to the reversing disk hub 32. The upper end of the reversing shaft 33 is connected to the counter-rotating gearbox 2, and the lower end of the reversing shaft 33 is connected to the reversing disk hub 32. The reversing disk 3 rotates in the opposite direction of the vortex, that is, the reversing disk 3 rotates in the opposite direction of the floating drive disk 1. Due to the conical profile of the vortex, the ratio of the outer diameter r1 of the reversing blade 31 to the outer diameter R1 of the drive blade 11 is generally 0.6 to 0.8. To maximize the purpose of stirring and vortex formation, the reversing blades 31 are distributed radially and have a rectangular cross-section. The height of the reversing blade 31 is h, and the width of the reversing blade 31 is w, satisfying the following conditions: h ≥ H and h ≥ 2w.

[0045] As shown in Figure 1, the lower end of spring 5 is connected to counterweight 6. Counterweight 6 has a certain weight m. Its value can be determined according to the degree of liquid level fluctuation under actual operating conditions, but should be set to at least 30% of the total weight M of the vortex elimination device, that is, m = 0.3M. When the liquid level fluctuation amplitude is large, the weight m of counterweight 6 can be set to 50% of the total weight M of the vortex elimination device, that is, m = 0.5M.

[0046] As shown in Figure 1, a traction cable 7 is connected between the pump station's suction end and the counterweight 6. One end of the traction cable 7 is connected to the counterweight 6, and the other end is connected to the suction pipe 8. The connection point with the suction pipe 8 is located midway between the liquid surface 9 and the bottom edge of the suction pipe 8. To ensure that the floating device can float freely to the liquid surface vortex, the traction cable 7 should have a certain length L. However, it is also necessary to prevent the traction cable 7 from being too long, causing the floating device to be sucked into the suction pipe under extreme operating conditions and colliding with the pump blades, causing damage to the pump device. Therefore, the length L of the traction cable 7 is generally limited to meet the following conditions: (Tt) ≥ L ≥ 0.8(Tt);

[0047] Where Tt is the vertical distance between the liquid level 9 and the suction inlet. T is the vertical height of the liquid level 9 from the forebay bottom 10, and t is the vertical height of the lower edge of the suction pipe 8 from the forebay bottom 10.

[0048] As shown in Figures 8 and 9, the effect of the floating counter-rotating vortex elimination device of the pump station of the present invention was observed through numerical simulation. The wall rotation method was used to artificially generate a rotating flow in the cylindrical flow field. The above figure is a cross-sectional schematic diagram of the cylindrical flow field, with rotating walls on both sides. The variable used in the cloud map is the Q criterion, which is a dimensionless parameter that characterizes the vortex intensity. Since the cylindrical rotation generates an artificial vortex, it can be seen that the vortex maximum value (red area) appears on both sides of the wall and gradually decreases toward the middle. After the vortex elimination device is configured, the local vortex intensity of the vortex elimination device is lower, and the vortex elimination device has a dissipative effect on the transmission of the vortex.

[0049] A pump station comprises at least two of the above-mentioned floating counter-rotating vortex elimination devices, wherein the first floating counter-rotating vortex elimination device of the pump station is located on one side of the liquid surface near the water suction end of the pump station; the second floating counter-rotating vortex elimination device of the pump station is located on the other side of the liquid surface near the water suction end of the pump station; the driving directions of the driving blades 11 of the first floating counter-rotating vortex elimination device of the pump station and the driving directions of the driving blades 11 of the second floating counter-rotating vortex elimination device of the pump station are different; the first floating counter-rotating vortex elimination device of the pump station is used to eliminate the vortex on the liquid surface in the clockwise direction; the second floating counter-rotating vortex elimination device of the pump station is used to eliminate the vortex on the liquid surface in the counterclockwise direction.

[0050] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0051] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent embodiments or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pump station floating counter-rotating vortex elimination device, characterized in that: The invention comprises a floating drive disk (1), a counter-rotating gear box (2), a reversing disk (3), a plane bearing (4), an elastic element and a counterweight (6); the floating drive disk (1) floats on a liquid surface near the water suction end of a pump station, and drives the floating drive disk (1) to rotate by the power generated by a vortex; the floating drive disk (1) is connected to the reversing disk (3) through the counter-rotating gear box (2), so that the reversing disk (3) and the floating drive disk (1) have different rotation directions; a plane bearing (4) is installed at the bottom of the reversing disk (3), and the plane bearing (4) is connected to the counterweight (6) through an elastic element, so as to prevent tilting.

2. The pump station floating counter-rotating vortex elimination device according to claim 1 is characterized in that: The floating drive disc (1) comprises drive blades (11), a buoyancy disc (12), a drive disc hub (13), a drive shaft (14) and a drive bevel gear (15); a plurality of drive blades (11) are evenly distributed between the buoyancy disc (12) and the drive disc hub (13); the upper end of the drive shaft (14) is connected to the drive disc hub (13); the lower end of the drive shaft (14) is connected to the drive bevel gear (15); the power generated by the vortex is applied to the drive blades (11), so that the floating drive disc (1) and the vortex rotate in the same direction.

3. The pump station floating counter-rotating vortex elimination device according to claim 2 is characterized in that: The cross-sectional shape of the driving blades (11) is a quarter of a circular ring. The driving blades (11) are distributed radially and have the same thickness. The inlet and outlet of the driving blades (11) are respectively chamfered and transitioned. The number of the driving blades (11) is 3-6.

4. The pump station floating counter-rotating vortex elimination device according to claim 2 is characterized in that: The outer contour of the buoyancy disk (12) is a circular tensile body, the inner diameter of the buoyancy disk (12) is R1, the outer diameter of the buoyancy disk (12) is R2, the height of the buoyancy disk (12) is H, the interior thereof is a cavity, and the volume of the buoyancy disk (12) satisfies the following conditions: Where ρ is the density of water; M is the total mass of the floating counter-rotating vortex elimination device of the pump station; and k is the buoyancy coefficient.

5. The pump station floating counter-rotating vortex elimination device according to claim 2, characterized in that: The reversing disk (3) comprises a reversing blade (31), a reversing disk hub (32), a reversing shaft (33) and a reversing bevel gear (34); the inner edge of the reversing blade (31) is connected to the reversing disk hub (32); the upper end of the reversing shaft (33) is connected to the counter-rotating gear box (2), and the lower end of the reversing shaft (33) is connected to the reversing disk hub (32); the reversing disk (3) rotates in the opposite direction to the vortex.

6. The pump station floating counter-rotating vortex elimination device according to claim 5 is characterized in that: The ratio of the outer diameter r1 of the reversing blade (31) to the outer diameter R1 of the driving blade (11) is generally 0.6 to 0.8; the cross-sectional shape of the reversing blade (31) is rectangular, the height of the reversing blade (31) is h, and the width of the reversing blade (31) is w, satisfying the following conditions: h≥H and h≥2w.

7. The pump station floating counter-rotating vortex elimination device according to claim 1, characterized in that: Two transmission bevel gears (22) are coaxially mounted in the horizontal direction inside the counter-rotating gear box (2), and a driving bevel gear (15) and a counter-rotating bevel gear (34) are coaxially mounted in the vertical direction inside the counter-rotating gear box (2); the two transmission bevel gears (22) are respectively meshed with the driving bevel gear (15); the two transmission bevel gears (22) are respectively meshed with the counter-rotating bevel gear (34); the driving bevel gear (15) drives the counter-rotating bevel gear (34) to rotate in the opposite direction through the two transmission bevel gears (22).

8. The pump station floating counter-rotating vortex elimination device according to claim 1, characterized in that: The mass m of the counterweight (6) satisfies the following condition: m≥0.3M, where M is the total mass of the floating counter-rotating vortex elimination device of the pump station.

9. The pump station floating counter-rotating vortex elimination device according to claim 1, characterized in that: A traction rope (7) is connected between the water suction end of the pump station and the counterweight (6); the connection point between the traction rope (7) and the water suction end of the pump station is located at a middle position between the liquid surface (9) and the inlet of the water suction end; the length L of the traction rope (7) satisfies the following condition: (Tt)≥L≥0.8(Tt); Wherein, Tt is the vertical distance between the liquid surface (9) and the water suction end inlet.

10. A pumping station, characterized in that: The method comprises at least two pump station floating counter-rotating vortex elimination devices as described in any one of claims 1 to 9, wherein the first pump station floating counter-rotating vortex elimination device is located on one side of the liquid surface near the suction end of the pump station; the second pump station floating counter-rotating vortex elimination device is located on the other side of the liquid surface near the suction end of the pump station; the driving directions of the driving blades (11) of the first pump station floating counter-rotating vortex elimination device and the driving blades (11) of the second pump station floating counter-rotating vortex elimination device are different; the first pump station floating counter-rotating vortex elimination device is used to eliminate the vortex on the liquid surface in the clockwise direction; the second pump station floating counter-rotating vortex elimination device is used to eliminate the vortex on the liquid surface in the counterclockwise direction.

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