Universal joint type connecting device for connecting offshore wind turbine platform and seabed

Abstract

The invention belongs to the technical field of offshore power generation, and particularly discloses a universal joint type connecting device for connecting an offshore wind turbine platform with the seabed. The cross universal joint type connecting structure is installed at the bottom of the tension type floating wind power platform body, the cross universal joint type connecting structure serves as a swing center, when encountering strong wind or sea waves, the platform can swing under the action of stormy waves, floating is achieved under the action of buoyancy, meanwhile, the floating platform is connected with the seabed, and the floating platform is connected with the seabed. The acting force borne by the platform body can be transmitted to the seabed through the universal joint, the phenomenon of torsion generated when a mooring rope is used is avoided, the connection stability degree of the platform body and the seabed is improved, effective support is provided for wind power generation equipment, and a wind turbine generator can keep stable windward operation.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore power generation, and in particular to a universal joint connection device used for connecting an offshore wind turbine platform with the seabed. Background Art

[0002] As energy demand continues to increase and land resources become increasingly depleted, people's attention has gradually shifted from land to sea. The energy reserves of offshore resources are huge, especially in deep sea areas. The development of offshore energy is of great significance to energy structure adjustment and sustainable development.

[0003] Wind power generation equipment is a renewable energy facility used for wind power generation, which converts wind energy into electrical energy. Different from traditional wind power generation, offshore wind turbines refer to a wind power generation system in which wind turbines are built on a floating platform on the water surface, which is suitable for wind energy development in deep water areas. A conventional offshore wind turbine generally includes a floating platform consisting of at least one vertical buoy and at least one extension arm connected to the bottom of the buoy. The platform is composed of a steel structure or a reinforced concrete structure. The upper part is connected to the wind turbine tower and the nacelle, and the lower part is connected to the anchoring structure on the seabed by a mooring cable system to adapt to the waves, tides and wind changes in the marine environment.

[0004] However, when encountering special sea conditions, for example, when the mooring cable is continuously impacted by waves, the dynamic force it is subjected to can easily cause the mooring cable to twist, that is, the mooring cable is prone to bending, reducing the stability of the connection between the platform and the anchoring structure, thereby seriously weakening its functionality as a connecting structure and making it unable to provide effective support for the wind power generation equipment above the platform, thereby affecting the operating safety and power generation efficiency of the entire offshore wind power generation system. Summary of the invention

[0005] Therefore, the present invention provides a universal joint type connection device for connecting an offshore wind turbine platform to the seabed, so as to solve the problem in the prior art that the mooring cables used cannot provide effective support for wind power generation equipment.

[0006] Specifically, the present invention provides a universal joint type connection device for connecting an offshore wind turbine platform to the seabed, comprising a cross universal joint type connection structure, wherein the cross universal joint type connection structure is installed at the bottom of a platform body of a column-type floating wind turbine unit, and the cross universal joint type connection structure serves as a swing center, and is used for the platform body to swing around the cross universal joint type connection structure and be installed on the seabed.

[0007] Beneficial effects: By installing a cross universal joint type connection structure at the bottom of the platform body of the column-type floating wind turbine, and using the cross universal joint type connection structure as the swing center, when encountering strong winds or waves, the platform body can swing in accordance with the action of wind and waves, and float under the action of buoyancy, so that the force acting on the platform body can be transmitted to the seabed, avoiding the phenomenon of twisting when using mooring cables, improving the stability of the connection between the platform body and the seabed, providing effective support for wind power generation equipment, so that the wind turbine can maintain stable windward operation. At the same time, the platform body can automatically adjust its posture according to the changes in wind direction and waves, and better adapt to changes in the marine environment, that is, in relatively severe sea conditions, it can effectively capture wind energy, which helps to improve the phenomenon that power generation efficiency is affected by external environmental factors and improve the reliability of power generation. In addition, by reducing the direct impact of wind and waves on the generator set, the anti-deformation ability of the floating platform can also be improved.

[0008] In an optional embodiment, the cross universal joint type connection structure includes a seabed base and a universal joint assembly, the seabed base is fixed to the seabed; the universal joint assembly includes a first axis fixing member, a first axis, a second axis fixing member and a second axis, the first axis fixing member is installed on the top of the seabed base, the first axis is installed on the first axis fixing member, the second axis fixing member is installed on the bottom of the platform body, the second axis is installed on the second axis fixing member, and the second axis fixing member rotates around the central axis of the second axis; wherein the projections of the first axis and the second axis in the horizontal reference plane are cross-arranged.

[0009] Beneficial effect: By adding the first axis and the second axis, and making the projections of the first axis and the second axis in the horizontal reference plane cross-arranged, the first axis fixing part installed on the top of the seabed base and the second axis fixing part installed on the bottom of the platform body can rotate relative to each other, so that the platform body can rotate around the axis of the first axis and / or the axis of the second axis, avoiding the circumferential torsion of the platform body around the axis of the platform body, so that the force on the platform body is transmitted to the ground, that is, the torque on the platform body is directly transmitted to the ground. Such a setting helps the platform body to make adaptive adjustments according to changes in wind direction and waves, improves the wind resistance and wave resistance of the platform body, and enables it to maintain a relatively stable operating state in a complex marine environment, thereby making the power generation process more reliable.

[0010] In an optional embodiment, the cross universal joint type connection structure also includes a first shaft bearing and a second shaft bearing, the first shaft bearings are arranged in pairs and symmetrically distributed at the two ends of the first shaft along its axial direction; the second shaft bearings are arranged in pairs and symmetrically distributed at the two ends of the second shaft along its axial direction; wherein, any end of the first shaft along its axial direction is inserted into the first shaft bearing, and any end of the second shaft along its axial direction is inserted into the second shaft bearing.

[0011] Beneficial effects: By inserting the two ends of the first shaft body along its axis and the two ends of the second shaft body along its axis into the corresponding shaft bearings, the support structure of each shaft body can be strengthened, so that it can more stably withstand the forces and moments from the platform body and the seabed foundation. At the same time, the symmetrical arrangement of the various shaft bearings makes the corresponding shaft bodies more evenly stressed during the rotation process, improving the phenomenon of stress concentration and fatigue damage caused by uneven stress.

[0012] In an optional implementation, a bearing base is installed in the bearing space of any shaft body, and the bearing base is used to install the bearing of the shaft body.

[0013] Beneficial effect: By installing a bearing base in each shaft bearing space and installing corresponding bearings at the bearing base, the bearing's load-bearing capacity can be enhanced. At the same time, reliable support can be provided for the shaft, ensuring that the bearing provides the shaft with higher rotation accuracy and stability.

[0014] In an optional embodiment, any shaft bearing space is a watertight compartment.

[0015] Beneficial effects: By setting each shaft bearing room as a watertight compartment, moisture penetration into the bearing room is reduced, moisture is prevented from contacting the metal structure in the bearing room, the risk of corrosion is reduced, bearing damage and mechanical failure due to moisture erosion are avoided, the service life of the universal joint is extended, and economic benefits are improved.

[0016] In an optional embodiment, a plurality of seals are provided at the water outlet of the bearings between any shaft bearings, and the plurality of seals are spaced apart along the axial direction of the shaft to form a plurality of gaps, and the plurality of gaps are used to arrange the detection end of the pressure detection element, and the detection end of the pressure detection element is used to detect the pressure value at the location and convert it into a pressure signal, and the electrical connection end of the pressure detection element is electrically connected to the control terminal to transmit the pressure signal to the control terminal.

[0017] Beneficial effects: Since each shaft bearing is set in the form of a watertight compartment, it needs to be sealed. For example, by providing a plurality of seals arranged at intervals along the axis direction of the shaft body at the water outlet of each shaft bearing, multiple lines of defense are formed to effectively prevent moisture and other impurities from entering the bearing room, thereby improving the sealing performance. Since two adjacent seals are arranged at intervals along the axis direction of the shaft body, multiple gaps appear, and by providing a detection end of a pressure detection component at each gap, each pressure detection component can be hydraulically tested at the gap. By feeding back the measured hydraulic load data to the control terminal, multiple sets of adjacent gap hydraulic pressure differences can be formed, and then compared with the preset hydraulic pressure difference threshold, it can be determined whether the watertightness of each bearing is normal, so that the operation and maintenance personnel can make more accurate decisions. That is, by real-time monitoring and early warning of the hydraulic pressure of each bearing gap, the watertightness of the bearing can be confirmed in real time, and then it can be determined whether the bearing is abnormal during use, and a stable sealing environment and pressure monitoring mechanism can be constructed, which is helpful to improve the operating stability of the entire universal joint and reduce the downtime caused by failures.

[0018] In an optional embodiment, a detection end of a stress detection component is installed on any bearing base, and the detection end of the stress detection component is used to detect the radial stress value of the bearing. The electrical connection end of the stress detection component is electrically connected to the control terminal, and the stress detection component is used to convert the radial stress value into a radial stress signal and transmit the radial stress signal to the control terminal.

[0019] Beneficial effects: By adding radial stress detection parts to monitor the radial load on the bearing during operation in real time, real-time data support is provided to the operation and maintenance personnel, and abnormal conditions in the bearing operation, such as excessive stress and stress fluctuations, are discovered in time, thereby warning the operation and maintenance personnel of potential faults in advance, allowing the operation and maintenance personnel to make more accurate decisions in a timely manner and prevent safety accidents caused by bearing damage.

[0020] In an optional embodiment, a fluid channel extending along the axial direction is opened inside any shaft body, and the fluid channel is connected to the oil outlet of the oil storage component through an oil delivery pipe.

[0021] Beneficial effects: By opening a fluid channel extending along the axis direction inside each shaft body, and using an oil delivery pipe, the fluid channel is connected to the oil outlet of the oil storage part located at the platform body, so that the lubricating oil stored in the oil storage part can be continuously and stably transported to the inside of the shaft body through the fluid channel, reducing the downtime caused by insufficient lubrication, and evenly distributed on the surface of the shaft body, improving the lubrication effect, and reducing the friction and wear generated during the operation of each shaft body. At the same time, by adopting this design, the addition of lubricating oil is simpler and more convenient, reducing the cost and time of shaft maintenance.

[0022] In an optional embodiment, the cross universal joint type connection structure further includes a mounting block, and the mounting block is used for integrated mounting between the first shaft bearing and the second shaft bearing.

[0023] In an optional embodiment, the mounting block is provided with an oil filling hole, and the oil filling hole is connected to the fluid channel of the first shaft body and the fluid channel of the second shaft body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the specific implementation modes of the present invention, the drawings required for use in the technical description of the specific implementation modes will be briefly introduced below. Obviously, the drawings described below are some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic front view of a universal joint connection device provided by an embodiment of the present invention when installed at the bottom of an offshore wind turbine platform;

[0026] Figure 2 A schematic front view of a universal joint connection device for connecting an offshore wind turbine platform to the seabed provided by an embodiment of the present invention;

[0027] Figure 3 A schematic side view of a universal joint connection device for connecting an offshore wind turbine platform to the seabed provided by an embodiment of the present invention;

[0028] Figure 4 A schematic front view of a position between any shaft bearings in a universal joint type connection device for connecting an offshore wind turbine platform to the seabed provided by an embodiment of the present invention;

[0029] Figure 5 A perspective schematic diagram of a universal joint assembly in a universal joint type connection device for connecting an offshore wind turbine platform to the seabed provided by an embodiment of the present invention;

[0030] Description of reference numerals:

[0031] 1. Platform body; 11. Floating body body; 12. Connection body;

[0032] 2. Cross universal joint type connection structure; 21. Subsea base; 22. Universal joint assembly; 221. First shaft fixing piece; 222. First shaft; 223. Second shaft fixing piece; 224. Second shaft; 225. First shaft bearing space; 226. Second shaft bearing space; 227. Bearing base; 228. Bearing; 229. Seal; 231. Mounting block; 232. Oil filling hole;

[0033] 31. Pressure testing parts;

[0034] 41. Fluid channel; 42. Oil storage component; 43. Oil delivery pipe component;

[0035] 5. Pile foundation;

[0036] 6. Oil-water separation device;

[0037] K, seabed baseline; P, seabed baseline; Q, anti-landfill lifting section. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0042] Different from traditional wind power generation, floating wind turbines refer to a wind power generation system in which the wind turbines are built on a floating platform on the water surface. It is suitable for wind energy development in deep water areas.

[0043] Conventional floating wind turbines generally include a floating platform consisting of at least one vertical buoy and at least one extension arm connected to the bottom periphery of the buoy. The platform is composed of a steel structure or a reinforced concrete structure. The upper part is connected to the wind turbine tower and the nacelle, and the lower part is connected to the anchoring structure on the seabed by a mooring cable system to adapt to the changes in waves, tides and wind in the marine environment.

[0044] However, when encountering special sea conditions, for example, when the mooring cable is continuously impacted by waves, the dynamic force it is subjected to can easily cause the mooring cable to bend or even twist, which will reduce the stability of the connection between the platform and the anchoring structure, seriously weaken its functionality as a connecting structure, and fail to provide effective support for the wind power generation equipment above the platform, thereby affecting the operating safety and power generation efficiency of the entire offshore wind power generation system.

[0045] To this end, the present application extends the bottom of the platform body below the sea surface and toward the seabed, and at the same time adds a cross universal joint type connection structure at the bottom of the platform body, so that the bottom of the platform body can swing around the cross universal joint type connection structure, so that the force applied to the platform body of the floating platform wind turbine when encountering special sea conditions such as strong winds or waves can be transmitted to the seabed through the cross universal joint type connection structure, avoiding the twisting phenomenon when using the mooring cable, thereby improving the stability of the connection between the platform body and the seabed and providing effective support for the wind power generation equipment.

[0046] See also Figures 1 to 5 , Figure 1 A schematic front view of a universal joint connection device for connecting an offshore wind turbine platform to the seabed provided in an embodiment of the present application is shown; Figure 2 A schematic front view of a cross universal joint type connection structure after installation in a universal joint type connection device for connecting an offshore wind turbine platform to the seabed provided in an embodiment of the present application is shown; Figure 3 A schematic side view of a cross universal joint type connection structure after installation in a universal joint type connection device for connecting an offshore wind turbine platform to the seabed provided in an embodiment of the present application is shown; Figure 4 A schematic front view of a position between any shaft bearings in a universal joint type connection device for connecting an offshore wind turbine platform to the seabed provided by an embodiment of the present application is shown; Figure 5 A perspective schematic diagram of a universal joint assembly in a universal joint type connection device for connecting an offshore wind turbine platform to the seabed provided in an embodiment of the present application is shown. In the figure, K is the seabed baseline; P is the seabed baseline; and Q is the anti-landfill lifting section.

[0047] Combine the following Figures 1 to 5 , describing an embodiment of the present invention.

[0048] According to an embodiment of the present invention, a universal joint type connection device for connecting an offshore wind turbine platform to the seabed is provided. Figure 1As shown, the universal joint type connection device for connecting the offshore wind turbine platform to the seabed includes a cross universal joint type connection structure 2, which is installed at the bottom of the platform body 1 of the column type floating wind turbine set, and the cross universal joint type connection structure 2 serves as a swing center, and the cross universal joint type connection structure 2 is swingably installed on the seabed.

[0049] In this arrangement, by installing a cross universal joint type connection structure 2 at the bottom of the platform body 1 and taking the cross universal joint type connection structure 2 as the swing center, when encountering strong winds or waves, the platform body 1 swings around the cross universal joint type connection structure 2, so that the force acting on the platform body 1 can be transmitted to the seabed, avoiding the twisting phenomenon that occurs when using mooring cables, thereby improving the stability of the connection between the platform body 1 and the seabed, providing effective support for the wind power generation equipment, and allowing the wind turbine to maintain stable operation against the wind.

[0050] At the same time, the platform body 1 can automatically adjust its posture according to the changes in the wind box and waves to better adapt to the changes in the marine environment. That is, under relatively harsh human conditions, it can effectively capture wind energy, help improve the phenomenon that power generation efficiency is affected by external environmental factors, and improve the reliability of power generation.

[0051] In addition, the anti-capsulation capability of the floating platform can be improved by improving the impact of wind and waves on the generator set.

[0052] In one embodiment, Figure 2 and Figure 3 As shown, the cross universal joint type connection structure 2 includes a seabed base 21 and a universal joint assembly 22, the seabed base 21 is fixed on the seabed; the universal joint assembly 22 includes a first shaft fixing member 221, a first shaft 222, a second shaft fixing member 223 and a second shaft 224, the first shaft fixing member 221 is installed on the top of the seabed base 21, the first shaft 222 is installed on the first shaft fixing member 221, the second shaft fixing member 223 is installed on the bottom of the platform body 1, the second shaft 224 is installed on the second shaft fixing member 223, and the second shaft fixing member 223 rotates around the central axis of the second shaft 224; wherein the projections of the first shaft 222 and the second shaft 224 in the horizontal reference plane are cross-arranged.

[0053] That is, by adding the first axis 222 and the second axis 224, and making the projections of the first axis 222 and the second axis 224 in the horizontal reference plane cross-arranged, the first axis fixing part 221 installed on the top of the seabed base 21 and the second axis fixing part 223 installed on the bottom of the platform body 1 can rotate relative to each other, so that the platform body 1 can rotate around the first axis axis and / or the second axis axis, avoiding the circumferential torsion of the platform body 1 around the axis of the platform body 1, so that the torque applied to the platform body 1 is directly transmitted to the ground.

[0054] Such a configuration helps the platform body 1 to make adaptive adjustments according to changes in the wind box and waves, thereby improving the wind and wave resistance of the floating platform, allowing it to maintain a relatively stable operating state even in a complex marine environment, thereby making the power generation process more reliable.

[0055] Preferably, the projections of the first shaft body 222 and the second shaft body 224 in the horizontal reference plane are arranged vertically.

[0056] It can be explained that, in this embodiment, Figure 2 and Figure 3 As shown, the seabed base 21 is fixed to the seabed by pile foundation 5, P in the figure is the seabed baseline, Q is the anti-landfill lifting section, that is, the height difference between the first shaft body fixing member 221 and the seabed baseline after being lifted by the seabed base 21, the purpose of which is to prevent the silt landfill of the universal joint assembly 22 caused by the movement of the seabed. The lifting height is determined by the specific construction environment.

[0057] It can be explained that in order to improve the degree of integration of the cross-joint type connection structure 2 of the present application, the first shaft 222 and the second shaft 224 are integrated and installed on the mounting block 231, and the axis of the first shaft and the axis of the second shaft are located in the same horizontal reference plane. At this time, the second shaft fixing member 223 rotates around the second shaft 224 to realize the rotation of the second shaft fixing member 223 relative to the first shaft fixing member 221.

[0058] Preferably, if Figure 5 As shown, the mounting block 231 is centrally disposed on the first shaft body 222 and centrally disposed on the second shaft body 224 .

[0059] In one embodiment, Figure 2 and Figure 3 As shown, the cross universal joint type connection structure 2 also includes a first shaft bearing space 225 and a second shaft bearing space 226. The first shaft bearing space 225 is arranged in pairs and symmetrically distributed at the two ends of the first shaft 222 arranged along its axial direction; the second shaft bearing space 226 is arranged in pairs and symmetrically distributed at the two ends of the second shaft 224 arranged along its axial direction; wherein, any end of the first shaft 222 arranged along its axial direction is inserted into the first shaft bearing space 225, and any end of the second shaft 224 arranged along its axial direction is inserted into the second shaft bearing space 226.

[0060] In this way, by inserting the two ends of the first shaft body 222 set along its axial direction and the two ends of the second shaft body 224 set along its axial direction into the corresponding shaft bearings, the support structure of each shaft body can be strengthened so that it can more stably withstand the forces and moments from the platform body 1 and the seabed base 21.

[0061] At the same time, the symmetrical arrangement of various shaft bearings makes the corresponding shafts more evenly stressed during rotation, improving the phenomenon of stress concentration and fatigue damage caused by uneven stress.

[0062] In one embodiment, Figure 4 As shown, a bearing base 227 is installed in the bearing space of any shaft body, and the bearing base 227 is used to install the bearing of the shaft body.

[0063] With such arrangement, by installing a bearing base 227 between each shaft bearing and installing a corresponding bearing 228 at the bearing base 227, the load-bearing capacity of the bearing 228 can be enhanced. At the same time, reliable support can be provided for the shaft to which it belongs, ensuring that the bearing 228 provides the shaft with higher rotation accuracy and stability.

[0064] It can be explained that the shape of the bearing base 227 is not specifically limited. It can be a square, annular, or at least one of the above shapes, and only a cavity for accommodating the bearing 228 is provided inside it.

[0065] It can be explained that the bearing 228 is preferably a cylindrical roller bearing. At this time, each bearing 228 is composed of an inner ring, an outer ring and a cylindrical rolling element, which mainly bears lateral (i.e. Figure 4 vertical direction) pressure.

[0066] Therefore, a detection end of a stress detection device is installed on any bearing base 227. The detection end of the stress detection device is used to detect the radial stress value of the bearing 228. The electrical connection end of the stress detection device is electrically connected to the control terminal. The stress detection device is used to convert the radial stress value into a radial stress signal, and transmit the radial stress signal to the control terminal to determine whether the tension system is working normally.

[0067] Such a setting, by adding a radial stress detection component, is used to monitor the radial load on the bearing 228 during operation in real time, provide real-time data support for the operation and maintenance personnel, and promptly discover abnormal conditions in the operation of the bearing 228, such as excessive stress, stress fluctuations, etc., so as to warn the operation and maintenance personnel of potential faults in advance, allowing the operation and maintenance personnel to make more accurate decisions in time and prevent safety accidents caused by damage to the bearing 228.

[0068] Specifically, the detection end of the stress detection component is located on the inner wall of the cavity of the bearing base 227 and abuts against the outer wall of the outer ring of the bearing 228 .

[0069] In one embodiment, any shaft bearing compartment is selected to be a watertight compartment.

[0070] By configuring each shaft bearing room as a watertight compartment, moisture penetration into the bearing room is reduced, moisture is prevented from contacting the metal structure in the bearing room, the risk of corrosion is reduced, bearing damage and mechanical failure caused by moisture erosion are avoided, the service life of the universal joint is extended, and the economic benefits are improved.

[0071] Furthermore, a plurality of seals 229 are provided at the water outlet of the bearings between any shaft bearings, and the plurality of seals 229 are spaced apart along the axial direction of the shaft to form a plurality of gaps, and the plurality of gaps are used to arrange the detection end of the pressure detection component 31, and the detection end of the pressure detection component 31 is used to detect the pressure value at the location and convert it into a pressure signal; the universal joint type connection device for connecting the offshore wind turbine platform to the seabed also includes a control terminal, which is electrically connected to the electrical connection end of the pressure detection component 31, and the control terminal is used to receive the pressure signal fed back by the pressure detection component 31 and convert it into a pressure value, and the control terminal is preset with a pressure difference threshold.

[0072] In this arrangement, since each shaft bearing room is configured as a watertight compartment, it needs to be sealed. For example, a plurality of seals 229 spaced apart along the axial direction of the shaft body are provided at the bearing water outlet of each shaft bearing room to form multiple lines of defense, thereby effectively preventing moisture and other impurities from entering the interior of the bearing room and improving the sealing performance.

[0073] Since two adjacent sealing members 229 are spaced apart in the axial direction of the shaft body, a plurality of gaps appear. By providing a detection end of a pressure detection member 31 at each gap, each pressure detection member 31 can monitor the hydraulic pressure at the gap in real time. By feeding back the measured hydraulic load data to the control terminal, a plurality of groups of adjacent gap hydraulic pressure differences can be formed. After comparing each group of hydraulic pressure differences with a preset hydraulic pressure difference threshold, it is determined whether the water tightness of each bearing 228 is normal, so that the operation and maintenance personnel can make more accurate decisions.

[0074] That is, by real-time monitoring and early warning of the hydraulic pressure of each bearing 228 gap, the watertightness of the bearing 228 can be confirmed in real time, and then it can be determined whether the bearing 228 has any abnormalities during use, thereby building a stable sealing environment and pressure monitoring mechanism, which helps to improve the operating stability of the entire universal joint and reduce downtime caused by failures.

[0075] In addition, in order to improve the efficiency of lubricating oil reuse, it is necessary to recycle the lubricating oil after lubrication. At this time, an oil-water separator 6 is added, and the inlet of the oil-water separator 6 is connected to each shaft bearing by a pipe fitting to separate the mixture of water and oil, and the separated water is discharged through a sewage discharge structure such as a sewage discharge pipe fitting, and the separated lubricating oil is drained into the oil storage part 42 for storage, and the recovery is completed for subsequent reuse.

[0076] Preferably, the control terminal is a signal acquisition device for collecting pressure signals and stress signals and converting them into corresponding pressure values ​​and stress values ​​for analysis by maintenance personnel. For example, the hydraulic pressure difference corresponding to adjacent gaps is used to determine whether the water tightness of the bearing 228 is normal.

[0077] It can be explained that the hydraulic pressure difference mentioned in the above embodiment can be the hydraulic pressure difference measured by the detection ends of two adjacent pressure detection components 31, or the hydraulic pressure difference measured by the detection ends of two pressure detection components 31 arranged at intervals.

[0078] In one embodiment, a fluid channel 41 extending along the axial direction is opened inside any shaft body; the universal joint type connection device for connecting the offshore wind turbine platform to the seabed also includes an oil storage part 42, which is used to store lubricating oil. The oil storage part 42 is installed on the platform body 1, and the fluid channel 41 is connected to the oil outlet of the oil storage part 42 through an oil pipe part 43.

[0079] In this way, a fluid channel 41 extending along the axial direction is opened inside each shaft body, and an oil pipe 43 is used to connect the fluid channel 41 with the oil outlet of the oil storage part 42 located at the platform body 1, so that the lubricating oil stored in the oil storage part 42 can be continuously and stably transported to the inside of the shaft body through the fluid channel 41, and then flow along the outer wall surface of the shaft body along the gap between the shaft and the bearing, and evenly distributed on the surface of the shaft body, thereby improving the lubrication effect and reducing the friction and wear generated during the operation of each shaft body.

[0080] At the same time, by adopting this design, the addition of lubricating oil is made simpler and more convenient, reducing the cost and time of maintaining the shaft.

[0081] In addition, the lubricating oil has a certain viscosity and therefore has a certain watertight effect.

[0082] Preferably, the oil storage member 42 is a gravity oil tank.

[0083] like Figure 5 As shown, since the first shaft body 222 and the second shaft body 224 are integrally installed at the mounting block 231, and the mounting block 231 is centrally arranged at the first shaft body 222 along the direction of the axis of the first shaft body, and centrally arranged at the second shaft body 224 along the direction of the axis of the second shaft body, it is preferred that an oil filling hole 232 is opened at the mounting block 231, and the oil filling hole 232 is connected to the fluid channel 41 of the first shaft body 222 and the fluid channel 41 of the second shaft body 224.

[0084] Such a configuration can improve the flow path of the lubricating oil, allowing the lubricating oil to flow quickly and evenly into the first shaft body 222 and the second shaft body 224. Compared with the lubricating oil first passing through the interior of one of the first shaft body 222 and the second shaft body 224 and then flowing into the interior of the other, the lubrication path of the lubricating oil is greatly shortened and the lubrication efficiency is improved.

[0085] It can be explained that, in this embodiment, the second shaft fixing member 223 is provided with a pair of first connecting holes arranged at intervals, and the first shaft fixing member 221 is provided with a pair of second connecting holes arranged at intervals, and the projection of the connecting line between the pair of first connecting holes and the connecting line between the pair of second connecting holes in the horizontal reference plane are intersected. At this time, the first connecting hole and the arc outer wall surface of the second shaft 224 are conformally arranged, and the second connecting hole and the arc outer wall surface of the first shaft 222 are conformally arranged.

[0086] During installation, the first shaft body 222 is inserted into a pair of second connection holes along its axial direction, and the second shaft body 224 is inserted into a pair of first connection holes along its axial direction to achieve fixation between the first shaft body fixing member 221 and the second shaft body fixing member 223 .

[0087] It can be shown that the horizontal reference plane is defined as Figure 1 The reference plane on which the horizontal direction is shown.

[0088] After each shaft body is installed, the axis of the first shaft body and the axis of the second shaft body are parallel to the horizontal reference plane.

[0089] Preferably, the first shaft axis is perpendicular to the second shaft axis.

[0090] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A universal joint connection device for connecting an offshore wind turbine platform to the seabed, characterized in that: include: A cross universal joint type connection structure (2), wherein the cross universal joint type connection structure (2) is installed at the bottom of a platform body (1) of a column-type floating wind turbine generator set, and the cross universal joint type connection structure (2) serves as a swing center, and the cross universal joint type connection structure (2) is swingably installed on the seabed.

2. The universal joint connection device for connecting an offshore wind turbine platform to the seabed according to claim 1, characterized in that: The cross universal joint type connection structure (2) comprises: A seabed base (21), wherein the seabed base (21) is fixed on the seabed; A universal joint assembly (22), the universal joint assembly (22) comprising a first shaft fixing member (221), a first shaft (222), a second shaft fixing member (223) and a second shaft (224), the first shaft fixing member (221) being mounted on the top of the seabed base (21), the first shaft (222) being mounted on the first shaft fixing member (221), the second shaft fixing member (223) being mounted on the bottom of the platform body (1), the second shaft (224) being mounted on the second shaft fixing member (223), and the second shaft fixing member (223) rotating around the central axis of the second shaft (224); The projections of the first axis (222) and the second axis (224) in the horizontal reference plane are arranged crosswise.

3. The universal joint connection device for connecting an offshore wind turbine platform to the seabed according to claim 2, characterized in that: The cross universal joint type connection structure (2) further comprises: First shaft bearing spaces (225), the first shaft bearing spaces (225) are arranged in pairs and symmetrically distributed at two ends of the first shaft (222) arranged along the axis direction thereof; Second shaft bearing spaces (226), the second shaft bearing spaces (226) being arranged in pairs and symmetrically distributed at two ends of the second shaft (224) arranged along the axis direction thereof; Wherein, any end of the first shaft body (222) arranged along its axial direction is inserted into the first shaft body bearing space (225), and any end of the second shaft body (224) arranged along its axial direction is inserted into the second shaft body bearing space (226).

4. The universal joint connection device for connecting an offshore wind turbine platform to the seabed according to claim 3, characterized in that: A bearing base (227) is installed in the bearing space of any shaft body, and the bearing base (227) is used to install the bearing (228) of the shaft body.

5. The universal joint connection device for connecting an offshore wind turbine platform to the seabed according to claim 4, characterized in that: Each shaft bearing compartment is a watertight compartment.

6. The universal joint connection device for connecting an offshore wind turbine platform to the seabed according to claim 5, characterized in that: A plurality of sealing members (229) are provided at the water outlet of the bearings between any shaft bearings. The plurality of sealing members (229) are arranged at intervals along the axial direction of the shaft to form a plurality of gaps. The plurality of gaps are used to arrange the detection end of the pressure detection member (31). The detection end of the pressure detection member (31) is used to detect the pressure value at the location and convert it into a pressure signal. The electrical connection end of the pressure detection member (31) is electrically connected to the control terminal to transmit the pressure signal to the control terminal.

7. A universal joint connection device for connecting an offshore wind turbine platform to the seabed according to any one of claims 1 to 6, characterized in that: A fluid channel (41) extending along the axial direction is provided inside any shaft body, and the fluid channel (41) is connected to the oil outlet of the oil storage component (42) through an oil delivery pipe component (43).

8. The universal joint connection device for connecting an offshore wind turbine platform to the seabed according to any one of claims 3 to 6, characterized in that: A detection end of a stress detection component is installed on any bearing base (227), and the detection end of the stress detection component is used to detect the radial stress value of the bearing (228). The electrical connection end of the stress detection component is electrically connected to the control terminal, and the stress detection component is used to convert the radial stress value into a radial stress signal, and transmit the radial stress signal to the control terminal.

9. The universal joint connection device for connecting an offshore wind turbine platform to the seabed according to claim 8, characterized in that: The cross universal joint type connection structure (2) further comprises: A mounting block (231), wherein the mounting block (231) is used for integrally mounting the first shaft bearing space (225) and the second shaft bearing space (226).

10. The universal joint connection device for connecting an offshore wind turbine platform to the seabed according to claim 9, characterized in that: The mounting block (231) is provided with an oil injection hole (232), and the oil injection hole (232) is in communication with the fluid channel (41) of the first shaft body (222) and the fluid channel (41) of the second shaft body (224).

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