CN113266531B

CN113266531B - Feedback anti-impact base for offshore wind power

Info

Publication number: CN113266531B
Application number: CN202110442987.2A
Authority: CN
Inventors: 不公告发明人
Original assignee: Spic Jiangsu Offshore Wind Power Generation Co ltd
Current assignee: Spic Jiangsu Offshore Wind Power Generation Co ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2022-07-08
Anticipated expiration: 2040-06-18
Also published as: CN111622903B; CN111622903A; CN113266531A

Abstract

The invention discloses a feedback anti-impact base for offshore wind power, which is connected with a generator head and comprises a support column, a buoyancy component, a connecting seat, mounting columns and a bottom plate, wherein the bottom plate is fixed on the seabed, the upper surface of the bottom plate vertically extends upwards to form a plurality of mounting columns, the connecting seat comprises a connecting column and a connecting disc, a plurality of holes corresponding to the mounting columns are formed in the connecting disc, the connecting disc can vertically slide along the mounting columns, the connecting disc is upwards connected with the buoyancy component through the connecting column, the buoyancy component has gravity and buoyancy matched with the gravity of the generator head, the support column and the buoyancy component, the support column is connected with the buoyancy component and the generator head, and the buoyancy component is positioned below the sea level. The force assembly includes a float block having a displacement volume that is adjustable in size.

Description

Feedback anti-impact base for offshore wind power

Technical Field

The invention relates to the field of offshore wind power devices, in particular to a feedback anti-impact base for offshore wind power.

Background

Offshore wind power is a clean energy, and with the technical progress, the development of offshore wind power is more and more.

In the prior art, most offshore wind power has a foundation with high strength, and a foundation fixed on the seabed provides supporting force through a metal truss structure, so that the structure consumes a large amount of installation and construction cost; there is also a suspension structure, which provides a base for supporting in balance with gravity by providing a buoyancy block, but because there is ocean current in the sea, it needs to anchor to prevent it from drifting, and the anchoring structure also needs to provide a corresponding structural locking member on the sea bottom, and the anchoring force provided is used to balance the impact of the ocean current, and the offshore wind power operation place often has strong wind and ocean current, so the anchoring rope and the fastening member on the sea bottom have great safety factor and high manufacturing cost.

Disclosure of Invention

The invention aims to provide a feedback anti-impact base for offshore wind power, and aims to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a feedback protecting against shock base that offshore wind power used, connect the generator head, feedback protecting against shock base includes the support column, buoyancy module, the connecting seat, erection column and bottom plate, the bottom plate is fixed in the seabed, a plurality of erection columns up stretch out of bottom plate upper surface is vertical, the connecting seat includes spliced pole and connection pad, set up the hole that a plurality of and erection column correspond on the connection pad, but the connection pad is vertical to slide along the erection column, the connection pad upwards is connected with buoyancy module through the spliced pole, buoyancy module have with the generator head, the support column, buoyancy module self gravity and assorted buoyancy, buoyancy module and generator head are connected to the support column, buoyancy module is located under the sea level.

Carry out gravity balance by buoyancy module provides the holistic buoyancy of device, rather than providing ascending holding power by the bottom plate of connecting at the seabed, thereby, alleviate the bottom plate greatly, the structural strength demand of erection column, the bottom plate, the erection column only need pull and hold the unsteady part in top, prevent that its level from floating can, because bottom plate structural strength demand reduces greatly, thereby, the installation degree of difficulty of bottom plate also reduces greatly, unsteady buoyancy module is arranged in under the sea level, recommend under the sea level ~ meter, this degree of depth is not calculated deeply, however, the speed of this layer of sea water reduces greatly, do not like surface layer sea water because the sea wind blows and so strong, make the impact force of its drift reduce greatly on the horizontal direction that buoyancy module received promptly, thereby the intensity demand of erection column has been alleviateed again.

Further, buoyancy module includes the floating block, the floating block has big or small adjustable drainage volume, big or small adjustable drainage volume is for example an air bag structure, when filling more gas in the gasbag, the volume grow, the drainage volume increases, then the buoyancy that provides is bigger, also can be the structure like submarine, during the suspended state, the drainage volume suits with the gravity of required balance, when needs sink, water injection in toward a cavity, then gravity improves, buoyancy can no longer be balanced, then the part that can vertically move wholly sinks, when sinking to the demand position, directly improve the water discharge cavity that will pour into, get back to buoyancy-gravity balanced state again, this floats and sinks for changing whole gravity, the mode of change buoyancy in the past is opposite. The buoyancy component can change the depth of the large-size component in water by floating and sinking, prevent the impact of shallow ocean current on the large-size component and change the running height of the generator head so as to ensure that the generator head can work at a proper height.

Furthermore, the buoyancy assembly also comprises a flow passing cage and a shielding assembly, vertical axis impeller and suction impeller, it installs on the kicking block upper surface to overflow the cage, it includes cage top and pillar to overflow the cage, cage top level, be connected through a plurality of pillars on cage top and the kicking block upper surface between, the cage top, pillar constructs a cylinder with the kicking block upper surface jointly and builds the cage, the kicking block includes cylindric block, block upper surface central authorities set up the vertical sprue that down extends, a plurality of reposition of redundant personnel runners and extend to the block surface are stretched out along the horizontal direction to the end of sprue in the block, it surrounds the block surface and opens the export of the reposition of redundant personnel runner of swimming side according to rivers selectivity to shelter from the subassembly, vertical axis impeller and suction impeller install on same vertical axle, vertical axle both ends are installed on cage top and sprue inner wall through the bearing respectively, vertical axis impeller is located and overflows the cage, suction impeller is located the sprue and is close to the import department of block upper surface.

The pillar of the flow-passing cage can pass water, when water flows through the vertical shaft impeller, the rotation of the vertical shaft impeller is driven, the vertical shaft impeller and the suction impeller are arranged on the same shaft, thereby, the suction impeller is also driven to rotate, the rotated suction impeller sucks water into the main runner, then the water is divided into a plurality of flow dividing runners, the shielding component can shield the flow dividing runner outlet on one side of the water-facing direction of the block surface, thereby, the water entering the block from the suction impeller is sprayed out from the water-backing side of the block, the speed of the sprayed water is higher than that of the water at the depth, the impact force of the water on the water-facing side surface of the buoyancy component is opposite to the direction of the action force of the water sprayed out from the block on the buoyancy component, the impact force balance is achieved, although the stressed area of the water-facing side of the buoyancy component is larger than that of the flow dividing runner outlet, but most of the water impact of the buoyancy component occurs at the depth of the block, the water flow velocity is lower than the flow velocity at the height of the overflowing cage, the water flow at the height of the overflowing cage passes through the overflowing cage at a higher speed and drives the vertical shaft impeller to rotate, the water flow velocity pumped by the pumping impeller is higher than the water flow velocity at the height of the block body, therefore, the water flow velocity sprayed by the diversion flow channel is higher than the water flow at the same height, the factor of small area of the reaction force of outflow is compensated, the balance condition of the reaction force and the impact force at the other side is achieved, although the balance may not be accurate, because the water flow velocity does not change with the water depth in a gradient manner, the approximate gradient change can play the most balance role of the structure, the rest part of the horizontal acting force of the buoyancy component which is not balanced is rigidly compensated by the mounting column, and the mounting column can be used without providing much horizontal limiting force, the structural strength requirements of the mounting post are not increased.

Furthermore, the shielding component comprises a circular ring and a rudder blade, the circular ring surrounds the outer surface of the block body, the lower part of the circular ring is provided with a wake flow outlet, a ring protrusion is arranged on the inner surface of the upper part of the circular ring in a notch form, the outer surface of the block body is provided with a ring groove, the ring protrusion is embedded into the ring groove, the circular ring and the block body are coaxial and can rotate relatively, the rudder blade is connected to the outer surface of the circular ring and extends radially, the central lines of the rudder blade and the wake flow outlet can drive the circular ring to rotate for an angle after the rudder blade is impacted by water flow on the same radial angle of the circular ring, the rudder blade stops when facing away from the water side, the wake flow outlet and the rudder blade are positioned under the same radial angle of the circular ring, the wake flow outlet can also reach the position of the back water, the wake flow outlet does not shield the diversion flow passage outlet, but other parts of the circular ring can shield the diversion outlet on the water side, thereby automatically completing the selection of the diversion flow passage along with the change of the water flow, the backwater side diversion flow passage is used as a flow passage for counteracting the force spraying water flow.

Furthermore, a bearing is arranged between the annular protrusion and the annular groove to reduce the rotating and sliding resistance.

Further, it still includes the awl ring to shelter from the subassembly, the outward appearance at the ring is set up to the awl ring, the rudder blade is kept away from to the awl ring, the awl head of awl ring is to the incoming flow, the awl ring will flow up to down the orientation and crowd, the awl ring not only can reduce the resistance of meeting water, reduce the impact force of incoming flow to buoyancy module, can also up down crowd the rivers, preferably all crowd the upper strata, it mixes the original rivers entering in the upper strata and overflows the cage to crowd the rivers of going up, the further increase is through the water velocity of vertical axis impeller, improve the acting capacity of suction impeller, get into more water in the sprue, use bigger water spray reaction force to carry out the incoming flow impact balance.

Furthermore, the number of the flow distribution channels is 8 or more, and the flow distribution channels are uniform by using the central axis of the block body.

Furthermore, the wake flow outlet occupies an angle smaller than 180 degrees in the circumferential direction of the circular ring, namely, only less than half of the diversion channel outlets can spray water, so that the diversion channel perpendicular to the flow direction of the water flow and having a larger included angle with the flow channel is prevented from diverting too much water entering the main flow channel, and the water spraying reaction force is too small to balance incoming flow impact.

Furthermore, a layer of filter screen is covered outside the overflowing cage; most of the effect of pillar is that support the cage top and with the support column, the generator head that the cage top is connected, the intensity demand is higher, so, can not make thinly, and if flow through in the cage if fish or large-scale debris get into, probably inhale the sprue and cause the jam, so, cover the one deck filter screen outside the pillar and filter these debris, the filter screen can not be too thin, otherwise, not only influence rivers and get into and flow through and carry out the rivers work in the cage, more can increase the impact force of meeting water, this reduces the long water impact force resistance performance that influences buoyancy module.

Compared with the prior art, the invention has the beneficial effects that: the invention provides buoyancy required by the unit through the buoyancy component, the simple structure bottom plate which is fixed on the sea bottom and helps to determine the position of the unit is arranged, most of the impact of ocean current on the unit is concentrated at the buoyancy component with a larger area, the impact of the incoming current can be vertically sucked and injected into the block and the reaction force of the horizontally sprayed water flow is counteracted, when sea wind influences the upper water body, seawater moves in one direction, impact force is generated on the water facing side of the ring, the water body higher than the layer can smoothly pass through the overflowing cage, the vertical shaft impeller is driven to rotate when passing through the overflowing cage, the sucking impeller is driven to suck the water body into the block and spray the water body from the backwater side of the block, the reaction force generated by the sprayed water flow is opposite to the action force generated by the incoming current water body on the buoyancy component, the impact action of the sea current is balanced in a feedback mode, and the requirement of the bottom plate and the mounting column on the limiting force provided by the connecting seat is greatly reduced, the use can be satisfied without how high the structural strength of the bottom plate and the mounting column is.

Drawings

In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the structure at the buoyancy module of the present invention;

FIG. 3 is view A of FIG. 2;

fig. 4 is view B-B of fig. 2.

In the figure: 1-generator head, 2-support column, 3-buoyancy component, 31-floating block, 311-block, 312-main runner, 313-shunt runner, 314-ring groove, 32-flow passing cage, 321-cage top, 322-support column, 33-shielding component, 331-ring, 3311-wake outlet, 3312-ring protrusion, 332-rudder blade, 333-cone ring, 34-vertical shaft impeller, 35-suction impeller, 4-connecting seat, 41-connecting column, 42-connecting disk, 5-mounting column and 6-bottom plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, a feedback protecting against shock base that offshore wind power used, generator head 1 is being connected, feedback protecting against shock base includes support column 2, buoyancy module 3, connecting seat 4, erection column 5 and bottom plate 6, bottom plate 6 is fixed in the seabed, 6 upper surfaces of bottom plate are vertical upwards to stretch out a plurality of erection column 5, connecting seat 4 includes spliced pole 41 and connection pad 42, set up the hole that a plurality of and erection column 5 correspond on the connection pad 42, connection pad 42 is along erection column 5 vertical slip, connection pad 42 upwards is connected with buoyancy module 3 through spliced pole 41, buoyancy module 3 have with generator head 1, support column 2, the gravity and the assorted buoyancy of buoyancy module 3 self, buoyancy module 3 and generator head 1 are connected to support column 2, buoyancy module 3 is located under the sea level.

The buoyancy component 3 provides the overall buoyancy of the device for gravity balance, instead of providing upward supporting force by the bottom plate 6 connected to the sea bottom, thereby greatly reducing the structural strength requirement of the bottom plate 6 and the mounting column 5, the bottom plate 6 and the mounting column 5 only need to pull the floating part above, and the floating of the floating part can be prevented, because the structural strength requirement of the bottom plate 6 is greatly reduced, thereby the installation difficulty of the bottom plate 6 is also greatly reduced, the floating buoyancy component 3 is arranged below the sea level, preferably 15-40 meters below the sea level, the depth is not deep, but the speed of the layer of seawater is greatly reduced, the floating buoyancy component 3 is not as strong as the surface layer of seawater blown by sea wind, namely the impact force for making the floating buoyancy component 3 greatly reduced in the horizontal direction, and the strength requirement of the mounting column 5 is reduced again.

As shown in fig. 2 to 4, the buoyancy module 3 includes a buoyancy block 31, the buoyancy block 31 has a displacement volume adjustable in size, for example, the displacement volume adjustable in size is an air bag structure, when more gas is filled in the air bag, the volume is increased, the displacement volume is increased, the provided buoyancy is larger, or the displacement module can be a structure similar to a submarine, when the displacement module is in a suspension state, the displacement volume is adapted to the gravity required to be balanced, when the displacement module is required to be lowered, water is injected into a chamber, the gravity is increased, the buoyancy can not be balanced any more, the vertically movable component is lowered as a whole, when the displacement module is lowered to a required position, the injected water is directly increased to be discharged out of the chamber, and the displacement module returns to a buoyancy-gravity balance state again, so that the displacement module is performed for changing the whole gravity, and the displacement module is opposite to the buoyancy changing mode in the foregoing. The buoyancy component 3 can change the depth of the large-size component in water by floating and sinking, prevent the impact of shallow ocean current on the large-size component, and also change the running height of the generator head 1 so as to ensure that the generator head can work at a proper height.

The buoyancy component 3 further comprises a flow passing cage 32, a shielding component 33, a vertical shaft impeller 34 and a suction impeller 35, the flow passing cage 32 is installed on the upper surface of the floating block 31, the flow passing cage 32 comprises a cage top 321 and a support 322, the cage top 321 is horizontal, the cage top 321 is connected with the upper surface of the floating block 31 through a plurality of supports 322, a cylindrical cage is constructed by the cage top 321, the supports 322 and the upper surface of the floating block 31 together, the floating block 31 comprises a cylindrical block 311, a main runner 312 extending vertically downwards is arranged in the center of the upper surface of the block 311, the tail end of the main runner 312 in the block 311 extends out of a plurality of shunt runners 313 along the horizontal direction and extends to the outer surface of the block 311, the shielding component 33 surrounds the outer surface of the block 311 and selectively opens the outlet of the shunt runner 313 on the backwater side according to water flow, the vertical shaft impeller 34 and the suction impeller 35 are installed on the same vertical shaft, two ends of the vertical shaft are respectively installed on the inner walls of the cage top 321 and the main runner 312 through bearings, a vertical axis impeller 34 is positioned within the flow cage 32 and a suction impeller 35 is positioned in the primary flowpath 312 proximate the entrance of the upper surface of the block 311.

The struts 322 of the flow-through cage 32 can pass water, when water flows through the vertical axis impeller 34, the water is driven to rotate, the vertical axis impeller 34 and the suction impeller 35 are installed on the same shaft, thereby, the suction impeller 35 is also driven to rotate, the rotated suction impeller 35 sucks water into the main runner 312, then the water is divided into a plurality of branch runners 313, because the shielding component 33 can shield the outlet of the branch runner 313 on one side of the surface of the block 311 facing the water direction, therefore, the water entering the block 311 from the suction impeller 35 is sprayed out from the side of the block 311 facing away from the water, the speed of the sprayed water is higher than that of the water at the depth, the impact force of the water on the surface of the water facing side of the buoyancy component 3 is opposite to the direction of the action force of the water sprayed out from the block 311 on the buoyancy component 3, the impact force balance is achieved, although the area of the force on the water facing side of the buoyancy component 3 is larger than the area of the outlet of the branch runner 313, however, most of the water impact of the buoyancy module 3 occurs at the depth of the block 311, where the water velocity is lower than the flow velocity at the height of the flow cage 32, the water at the height of the flow cage 32 passes through the vertical axis impeller 34 at a higher speed and drives the vertical axis impeller 34 to rotate, the water velocity pumped by the pumping impeller 35 is higher than the water velocity at the height of the block 311, so that the water velocity ejected by the diversion channel 313 is higher than the water at the same height, the small area of the reaction force of outflow is compensated, and the balance between the reaction force and the impact force on the other side is achieved, although the balance may not be exactly balanced, because the water velocity does not necessarily change in a gradient along with the change of the water depth, the approximate gradient change can play a large part of the balance function of the structure, and the remaining horizontal force of the buoyancy module 3 that is not balanced is rigidly compensated by the mounting column 5, the mounting post 5 does not need to provide as much horizontal restraining force to meet the use requirement without increasing the structural strength requirements of the mounting post 5.

The shielding component 33 comprises a circular ring 331 and a rudder blade 332, the circular ring 331 surrounds the outer surface of the block 311, the lower portion of the circular ring 331 is provided with a wake outlet 3311, in a form of a notch, the inner surface of the upper portion of the circular ring 331 is provided with a ring protrusion 3312, the outer surface of the block 311 is provided with a ring groove 314, the ring protrusion 3312 is embedded in the ring groove 314, the circular ring 331 and the block 311 are coaxial and can rotate relatively, the rudder blade 332 is connected to the outer surface of the circular ring 331 and extends radially, the center lines of the rudder blade 332 and the wake outlet 3311 respectively can drive the circular ring 331 to rotate an angle after being impacted by water flow on the same radial angle of the circular ring 331, when the rudder blade 332 stops when facing away from the water side, because the wake outlet 3311 and the rudder blade 332 are under the same radial angle of the circular ring 331, the wake outlet 3311 can also reach the position of the water-backing, the wake outlet 3311 does not shield the diversion flow passage 313 outlet of the water-facing side, but other portions of the circular ring 331 can shield the diversion flow passage 313 of the water-facing side, thus, the problem of selecting the diversion flow channel 313 is automatically completed following the change of the water flow, and the backwater-side diversion flow channel 313 is used as a flow channel for the reaction force water flow.

A bearing is arranged between the annular protrusion 3312 and the annular groove 314 to reduce the rotational sliding resistance.

The shielding component 33 further comprises a conical ring 333, the conical ring 333 is arranged on the outer surface of the circular ring 331, the conical ring 333 is far away from the rudder blade 332, the conical head of the conical ring 333 is facing to the incoming flow, the conical ring 333 is used for discharging the incoming flow in the up-down direction, the conical ring 333 not only can reduce the resistance to the incoming flow and reduce the impact force of the incoming flow on the buoyancy component 3, but also can discharge the water flow in the up-down direction, preferably all the water flow are discharged to the upper layer, the original water flow on the upper layer mixed with the water flow discharged in the overflow cage 32 is discharged, the water flow speed passing through the vertical shaft impeller 34 is further increased, the work capacity of the suction impeller 35 is improved, more water bodies enter the main flow passage 312, and the larger water spray reaction force is used for impact balance.

The number of the flow dividing channels 313 is 8 or more, and the flow dividing channels 313 are uniform with the central axis of the block body 311.

The wake outlet 3311 occupies an angle of less than 180 ° in the circumferential direction of the ring 331, i.e. only less than half of the outlets of the diversion channel 313 can spray water, so as to prevent the diversion channel 313 perpendicular to the flow direction of the water flow and having a larger angle with the flow channel from diverting too much water entering the main channel 312, which results in too small reaction force for spraying water and unbalanced incoming flow impact.

A layer of filter screen is arranged outside the overflowing cage 32; most of the pillars 322 are used for supporting the cage top 321, the supporting columns 2 connected with the cage top 321 and the generator head 1, the strength requirement is high, so that the manufacturing is impossible to be thin, if fish or large sundries enter the flow passing cage 32, the fish or the large sundries are possibly sucked into the main flow channel 312 to cause blockage, therefore, a layer of filter screen is covered outside the pillars 322 for filtering the sundries, the filter screen is not too thin, otherwise, the water flow entering the flow passing cage 32 for performing water flow work is influenced, the water impact force is increased, and the absorption length influences the water flow impact force resistance of the buoyancy assembly 3.

The main operation process of the device is as follows: the buoyancy component 3, the support column 2, the connecting seat 4 and the generator head 1 are dragged to travel to the positions of the bottom plate 6 and the mounting column 5, then the water body is lowered down, the connecting seat 4 is inserted into the mounting column 5 to be used as position location, the buoyancy component 3 provides buoyancy balanced with the gravity of the upper part, when sea wind influences the upper water body, the sea water moves towards one direction, impact force is generated on the water-facing side of the circular ring 331, and water bodies higher than the layer can smoothly pass through the flow-through cage 32, when passing through the flow cage 32, the vertical shaft impeller 34 is driven to rotate, and then the suction impeller 35 is driven to suck the water body into the block body 311 and spray the water body from the backwater side of the block body 311, the reaction force generated by the sprayed water flow is opposite to the reaction force generated by the incoming water body on the buoyancy assembly 3, the impact action of the ocean current is balanced in a feedback mode, the stabilizing unit hovers at the same position, and the requirement of limiting force provided for the connecting seat 4 on the mounting column 5 is greatly reduced.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. 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.

Claims

1. The utility model provides a feedback protecting against shock base that offshore wind power used, is connecting generator head (1), its characterized in that: the feedback anti-impact base comprises a supporting column (2), a buoyancy component (3), a connecting seat (4), mounting columns (5) and a bottom plate (6), the bottom plate (6) is fixed on the seabed, the upper surface of the bottom plate (6) vertically extends upwards to form the mounting columns (5), the connecting seat (4) comprises a connecting column (41) and a connecting disc (42), the connecting disc (42) is provided with a plurality of holes corresponding to the mounting columns (5), the connecting disc (42) can vertically slide along the mounting columns (5), the connecting disc (42) is upwards connected with the buoyancy component (3) through the connecting column (41), the supporting column (2) is connected with the buoyancy component (3) and a generator head (1), and the buoyancy component (3) is located below the sea level;

the buoyancy assembly (3) comprises a buoyancy block (31), and the buoyancy block (31) has a displacement volume with adjustable size;

the buoyancy component (3) further comprises a flow passing cage (32), a shielding component (33), a vertical shaft impeller (34) and a suction impeller (35), the flow passing cage (32) is installed on the upper surface of the floating block (31), the flow passing cage (32) comprises a cage top (321) and pillars (322), the cage top (321) is horizontal, the cage top (321) is connected with the upper surface of the floating block (31) through the pillars (322), the floating block (31) comprises a cylindrical block body (311), a main runner (312) extending vertically downwards is arranged in the center of the upper surface of the block body (311), the tail end of the main runner (312) in the block body (311) extends out of the shunt runners (313) in the horizontal direction and extends to the outer surface of the block body (311), the shielding component (33) surrounds the outer surface of the block body (311) and selectively opens an outlet of the shunt runner (313) on the backwater side according to water flow, and the vertical shaft impeller (34) and the suction impeller (35) are installed on the same vertical shaft, two ends of a vertical shaft are respectively arranged on the inner walls of the cage top (321) and the main flow channel (312) through bearings, the vertical shaft impeller (34) is positioned in the overflowing cage (32), and the suction impeller (35) is positioned at the inlet of the main flow channel (312) close to the upper surface of the block body (311);

the shielding component (33) comprises a circular ring (331) and a rudder blade (332), wherein the circular ring (331) surrounds the outer surface of the block body (311), a wake outlet (3311) is arranged at the lower part of the circular ring (331), a ring protrusion (3312) is arranged on the inner surface of the upper part of the circular ring (331), a ring groove (314) is arranged on the outer surface of the block body (311), the ring protrusion (3312) is embedded in the ring groove (314), the circular ring (331) and the block body (311) are coaxial and can rotate relatively, the rudder blade (332) is connected to the outer surface of the circular ring (331) and extends radially, and the central lines of the rudder blade (332) and the wake outlet (3311) are at the same radial angle of the circular ring (331);

the number of the flow dividing channels (313) is more than 8, and the flow dividing channels (313) are uniform by the central axis of the block body (311); and a filter screen is arranged outside the overflowing cage (32).

2. A feedback impact-resistant mount for offshore wind power as claimed in claim 1, wherein: and a bearing is arranged between the annular protrusion (3312) and the annular groove (314) to reduce the rotating and sliding resistance.

3. A feedback impact-resistant mount for offshore wind power as claimed in claim 1, wherein: the shielding assembly (33) further comprises a conical ring (333), the conical ring (333) is arranged on the outer surface of the circular ring (331), the conical ring (333) is far away from the rudder blade (332), the conical head of the conical ring (333) faces the incoming flow, and the conical ring (333) extrudes the incoming flow in the up-down direction.

4. A feedback impact-resistant mount for offshore wind power as claimed in claim 1, wherein: the wake outlet (3311) occupies an angle of less than 180 ° in the circumferential direction of the ring (331).