CN210769116U - Sealing system of ocean power generation device - Google Patents

Abstract

The utility model provides a sealing system suitable for ocean power generation facility, sealing system include at least one first sealing member and the protection device that leaks. The water leakage protection device is positioned on one side of the at least one first sealing element, which is far away from the seawater, and comprises a sealed water storage bin and a drain pipe. The sealed water storage bin collects and stores the seawater leaked from the at least one first seal. One end of the drain pipe is communicated with the sealed water storage bin, and the seawater stored in the sealed water storage bin is discharged through the drain pipe.

Description

Sealing system of ocean power generation device

Technical Field

The utility model belongs to ocean power generation field especially relates to a sealing system suitable for ocean power generation facility.

Background

Ocean energy (including tidal energy, wave energy, ocean current energy and the like) is a clean and pollution-free renewable energy source, is abundant in reserves and wide in distribution, and has excellent development prospect and value. The ocean energy is mainly used for power generation, and the working principle of the ocean energy is similar to that of wind power generation, namely, the mechanical energy of seawater is converted into electric energy through an energy conversion device. Specifically, firstly, seawater impacts a water turbine, the water turbine captures kinetic energy of the seawater, then the kinetic energy of the seawater is converted into rotary mechanical energy, and the mechanical energy drives a generator to generate electricity through a mechanical transmission system, and finally the electricity is converted into electric energy.

The water turbine is a key component capable of capturing the kinetic energy of the seawater, and directly influences the power generation efficiency of the whole generator set. At present, ocean energy water turbines which are applied more in the world are mainly divided into vertical axis water turbines and horizontal axis water turbines. Compared with a vertical axis water turbine, the horizontal axis water turbine has the advantages of simpler structure, lighter weight and high energy capture efficiency, and gradually becomes the mainstream form of an ocean energy generator set.

The blade is a core component of a horizontal axis water turbine for capturing ocean energy. The pitch angle of the blade can be adjusted, and the blade is divided into a fixed pitch and a variable pitch. The fixed pitch has the advantages of no pitch change and simple structure. However, since ocean energy has the periodic characteristics of reciprocation and flow rate change, the fixed pitch has the defects of poor controllability, incapability of realizing high-efficiency conversion rate of the ocean energy and the like, and finally, the waste of ocean energy resources and the cost rise of the ocean energy power generation device are caused.

Compared with a fixed pitch, the variable pitch has two main advantages: firstly, according to the reciprocating characteristic of ocean energy, the pitch angle of the blade can be adjusted in real time, so that the blade is opposite to the incoming direction of tidal current to capture the maximum kinetic energy, the water turbine is easier to start, the starting flow rate is reduced, and the high-efficiency operation can be realized during the rising tide and the falling tide; and secondly, when the tidal current flow rate exceeds the rated flow rate, the pitch angle is adjusted to reduce the kinetic energy captured by the blades so as to ensure that the water turbine works efficiently (cannot exceed the load) under the rated power. In conclusion, the starting characteristic and the operation reliability of the ocean energy water turbine can be improved by adjusting the pitch angle, power can be generated in flood tide and tide, the working time in one tide period is prolonged, and the total energy obtaining efficiency and the power generation efficiency are improved.

Due to the need to adjust the pitch angle, a pitch system needs to be provided at the hub. The pitch system is a core component of the whole generator set. The control system, the lubrication system and the like which are matched with the lubricating device all need to be maintained and repaired regularly. The blade seals also need to be replaced periodically to ensure safe operation of the power plant. The pitch control sealing function is to isolate a pitch control system in the cabin where the hub is located from external seawater, so that the propeller opening and feathering of the unit can be guaranteed under various working conditions, and the unit can run safely and stably. If it is sealed badly, the sea water that contains silt, impurity will leak inside into wheel hub, leads to the variable pitch system to damage, will harm the life and the operation safety of whole hydraulic turbine.

In the prior art, a part of ocean power generation devices do not consider the problem and directly operate, so that the device damage and the maintenance rate are greatly improved. Some people pay attention to the problem that the generator set is lifted out of the sea periodically for maintenance and repair, but the maintenance mode increases the power generation cost, reduces the power generation time and finally influences the commercial application of the whole power generation device.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome at least one among the prior art not enough, provide an ocean power generation facility's sealing system.

According to the utility model discloses an aspect provides a sealing system suitable for ocean power generation facility, and ocean power generation facility has two at least oar paddles that can become, and sealing system corresponds and sets up in the root of every paddle. The sealing system comprises at least one first sealing element and a water leakage protection device. The water leakage protection device is positioned on one side of the at least one first sealing element, which is far away from the seawater, and comprises a sealed water storage bin and a drain pipe. The sealed water storage bin collects and stores the seawater leaked from the at least one first seal. One end of the drain pipe is communicated with the sealed water storage bin, and the seawater stored in the sealed water storage bin is discharged through the drain pipe.

According to the utility model discloses an embodiment, sealing system still includes one at least second sealing member, is located one side that one at least first sealing member is close to the sea water, and wherein, one at least second sealing member does not seal when ocean power generation facility normally works, and one at least first sealing member plays sealed effect when ocean power generation facility normally works, when needs are demolishd or are changed one at least first sealing member, and one at least second sealing member work realizes sealed effect.

According to the utility model discloses an embodiment, sealing system still includes one at least third sealing member, and one at least third sealing member is located one side that one at least first sealing member is close to the sea water in order to keep out silt.

According to the utility model discloses an embodiment, sealing system still includes one-way check valve, is located the pipeline of drain pipe.

According to the utility model discloses an embodiment, the bottom of reservoir tank sets up for the slope, sets up to the direction slope of keeping away from first sealing member by being close to first sealing member, and the drain pipe communicates in the extreme low position of reservoir tank bottom.

According to the utility model discloses an embodiment, ocean power generation facility includes wheel hub, generator, main shaft, first sealed cabin and the second sealed cabin of connecting wheel hub and generator, and wheel hub is located first sealed cabin, and the generator is located first sealed cabin or second sealed cabin, and first sealed cabin rotates along with wheel hub, and the second sealed cabin is static relatively, and the sea water that the inside of main shaft was passed to the other one end of drain pipe was stored the reservoir storehouse is discharged the second sealed cabin.

According to the utility model discloses an embodiment, sealing system still includes water catch bowl and water pump, and the water catch bowl is located the sealed under-deck of second in order to collect drain pipe exhaust sea water, and the water pump is discharged above the sea water suction surface of water in the water catch bowl.

According to the utility model discloses an embodiment, ocean power generation facility still includes outer axle, and the one end intercommunication second sealed cabin of outer axle, the other end are located the surface of water more than, and the water pump is discharged more than the surface of water through outer axle suction behind the sea water with the water catch bowl.

According to an embodiment of the present invention, the at least one first sealing member and/or the water leakage protection device is of a half-and-half structure or a majority-and-half structure.

According to the utility model discloses an on the other hand still provides a sealing system suitable for ocean power generation facility, ocean power generation facility wheel hub, generator, the main shaft of connecting wheel hub and generator, and sealing system sets up on the main shaft. The sealing system comprises at least one first sealing element and a water leakage protection device. The water leakage protection device is positioned on one side of the at least one first sealing element, which is far away from the seawater, and comprises a sealed water storage bin and a drain pipe. The sealed water storage bin collects and stores the seawater leaked from the at least one first seal. One end of the drain pipe is communicated with the sealed water storage bin, and the seawater stored in the sealed water storage bin is discharged through the drain pipe.

According to the utility model discloses an embodiment of another aspect, sealing system still includes one at least second sealing member, is located one side that one at least first sealing member is close to the sea water, and wherein, one at least second sealing member does not seal when ocean power generation facility normally works, and one at least first sealing member plays sealed effect when ocean power generation facility normally works, when needs are demolishd or are changed one at least first sealing member, and one at least second sealing member work realizes sealed effect.

According to another aspect of the present invention, the sealing system further comprises at least one third sealing member, and the at least one third sealing member is located on one side of the at least one first sealing member near the seawater to block the silt.

According to another aspect of the present invention, the sealing system further comprises a one-way check valve in the pipeline of the drain pipe.

According to another aspect of the present invention, the bottom of the water storage compartment is inclined, and the water outlet pipe is inclined toward the direction away from the first sealing member, and the water outlet pipe is connected to the lowest position of the bottom of the water storage compartment.

According to the utility model discloses an embodiment of another aspect, sealing system still includes water catch bowl and water pump, and the water catch bowl is located the sealed under-deck of second in order to collect drain pipe exhaust sea water, and the water pump is discharged above the surface of water with the sea water suction in the water catch bowl.

According to the utility model discloses an on the other hand's an embodiment, ocean power generation facility still includes outer axle, and the one end intercommunication second sealed cabin of outer axle, the other end are located the surface of water more than, and the water pump is discharged more than the surface of water through outer axle suction behind the sea water with the water catch bowl.

According to another aspect of the present invention, at least one first sealing member and/or water leakage protection device is of a half-and-half structure or a majority structure.

To sum up, the utility model discloses set up in the sealing system of paddle root through setting up the protection device that leaks, stop the sealed cabin at wheel hub place and can intake the possibility, fully protect wheel hub and the motor in the sealed cabin. The drainage is convenient, the water can be automatically drained only by utilizing the idle time of the power generation device, the structure is simple, and the cost is reduced while the water is drained. The utility model discloses a sealing system can also set up alone on the main shaft, stops the sea water and advances the possibility of sealed cabin along the main shaft seepage.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a partial cross-sectional view of an ocean power generation apparatus according to a first embodiment of the present invention;

fig. 2 is a partially enlarged cross-sectional view of a sealing system provided at a blade root according to a first embodiment of the present invention;

FIG. 3 is an enlarged partial schematic view of FIG. 2;

fig. 4 is a partial enlarged sectional view of a sealing system provided at a spindle according to a second embodiment of the present invention.

Detailed Description

As shown in fig. 1, the sealing system 10 is suitable for use in an ocean power plant 100. In this embodiment, the ocean power generating apparatus 100 includes a hub 1, at least two variable-pitch blades 2, a generator 3, a main shaft 4 connecting the hub 1 and the generator 3, a first sealed cabin 5 and a second sealed cabin 6. Wheel hub 1 sets up in first sealed cabin 5, and variable oar paddle 2 rotatably connects in first sealed cabin 5, and generator 3 sets up in second sealed cabin 6, and the one end of main shaft 4 is located first sealed cabin 5, and the other end is located second sealed cabin 6. The first capsule 5 rotates along with the hub 1, and the second capsule 6 is relatively static, however, the utility model discloses do not limit to this. In other embodiments, the generator 3 may also be disposed within the first sealed compartment 5.

In the present embodiment, the sealing system 10 is arranged at the root of each blade 2 (only the sealing system 10 at the top is shown in fig. 1). The sealing system 10 comprises at least one first seal 11 and a water leakage protection device 12. The water leakage protection device 12 is located on the side of the at least one first sealing member 11 away from the sea water, relative to the first sealing member 11. The water leakage protection device 12 includes a sealed water storage tank 121 and a drain pipe 122. The sealed storage tank 121 collects and stores the seawater leaked from the at least one first sealing 11. One end of the water discharge pipe 122 is communicated with the sealed water storage tank 121, and the seawater stored in the sealed water storage tank 121 is discharged through the water discharge pipe 122.

Specifically, the ocean power generating apparatus of the embodiment employs the blades 2 capable of changing the pitch, and since the pitch system capable of controlling the rotation of the blades needs to be configured, the seawater is particularly easy to leak from the root of the blades 2 to the inside of the first sealed cabin 5. How to solve the sealed problem of the junction between the paddle of change oar and the cabin body of place, its degree of difficulty is far more than adopting the ocean power generation facility of fixed paddle. In particular, the sealing system provided at the root of the blade and the sealing system provided elsewhere have different application environments. Because of the sealing system provided in the spindle or elsewhere, the environment in which it is used is relatively static. However, the sealing system 10 provided at the root of the blade 2 is in a state of being rotated all the time because it is provided in the first capsule 5 where the hub 1 is located. In this state, it is more difficult to ensure that the seal is watertight, let alone to achieve underwater replacement of the seal.

Preferably, the first sealing member 11 may be provided in a plurality of ways, and when the first sealing member 11 located at the side closest to the sea (i.e. the outermost side) is loosened due to aging in long-term use, the one or more first sealing members 11 located at the inner side may continue to exert a sealing function, thereby ensuring a sealing performance.

The first seal 11 is particularly susceptible to ageing and relaxation due to the large impact forces of the seawater and the corrosive nature of the seawater. Even if the ocean power generating device of the embodiment is used for a long time, the sealing performance of the first sealing element 11 is reduced, and seawater leaks in, due to the arrangement of the water leakage protection device 12, all the leaked seawater is collected by the water storage bin 121, so that the seawater can be ensured not to directly spread to the hub 1 in the first sealed cabin 5, and the electronic components (such as the motor 8 for controlling the rotation of the blades, the gear box and the like) in the first sealed cabin 5 are prevented from being damaged.

In particular, although embodiments are illustrated herein, the sealing system 10 is disposed at the root of a variable pitch blade. However, it is undoubtedly obvious to a person skilled in the art that the sealing system 10 can also be arranged at the root of the stationary blade to provide a seal against leakage.

In this embodiment, the first sealing member 11 and/or the water leakage protection device 12 may be a half or a majority of half structure, which is convenient for disassembly and assembly. By arranging the sealing element with the structure instead of the sealing element with the conventional structure (the conventional sealing element is a complete annular sealing ring), the sealing element does not need to be disassembled when being replaced, and the replacement and the installation of the sealing element are very convenient. The defect that the sealing element can only be replaced or removed after most parts are disassembled in the prior art is overcome. However, the present invention is not limited to this.

In this embodiment, a fourth sealing member 13 is further disposed at a position where the water storage bin 121 contacts with the wall of the root of the blade 2. Because the place is static seal and has no external pressure, the fourth sealing element 13 is not easy to loosen, and the water storage bin 121 can be ensured to be sealed in a rotating state and not leak water.

In this embodiment, the sealing system 10 further includes a one-way stop valve 15 in the pipeline of the drain pipe 122. Preferably, the bottom of the water storage bin 121 is inclined from being close to the first sealing member 11 to being inclined away from the first sealing member 11 (inclined downwards as viewed from the direction shown in the figure), and the drain pipe 122 is communicated with the lowest position of the bottom of the water storage bin 121. The inclined structure is to accumulate the leaked seawater at the bottom, so that the seawater can be drained from the drain pipe 122 quickly and timely.

In this embodiment, the other end of the water discharge pipe 122 passes through the inside of the main shaft 4 and discharges the seawater into the second hermetic chamber 6. The sealing system 10 further comprises a water collection tank 16 and a water pump 17, wherein the water collection tank 16 is positioned in the second sealed cabin 6 to collect the seawater discharged from the water discharge pipe 122, and the water pump 17 pumps the seawater in the water collection tank 16 to the position above the water surface for discharge. Ocean power generation facility still includes outer axle 7, and the one end intercommunication second sealed cabin 6 of outer axle 7, the other end are located above the surface of water P, and water pump 17 passes through the sea water pipe in with water catch bowl 16, and the discharge is above the surface of water through outer axle 7 suction. The outer shaft 7 may also be used to route various cables (including but not limited to electrical wires and water lines).

Since the rising tide and the falling tide have a certain periodicity (the rising tide periods of different water areas are different), when the ocean power generation device of the embodiment utilizes tidal current energy to generate power, the ocean power generation device stops working periodically due to the flat tide or the stop tide. Taking a flood tide cycle or a flood tide cycle of six hours as an example, the ocean power generating device itself is stopped 4 times a day due to the flat tide or the stop tide. At this time, the ocean power generation apparatus of the present embodiment can discharge water using the shutdown gap without taking an additional drainage measure.

The amount of seawater leaked from the root of the blade 2 in six hours is not large, and the water storage bin 121 can store the leaked seawater in the period of time without extra large volume, so that other electric parts in the first sealed cabin 5, such as the hub 1 or the motor 8 (the motor 8 for controlling the pitch of the blade 2), are not corroded by the seawater absolutely. When the tide is flat or stopped, the first capsule 5 and the hub 1 will almost stop rotating. At this time, the first sealed cabin 5 can be controlled to rotate slowly by electricity, each paddle 2 needing to be drained is rotated to the uppermost position, and the paddle is stopped for a short time (preferably, the first sealed cabin 5 can be controlled to be relatively static by an electric braking system at this time), so that the water storage cabin 121 can be drained.

Specifically, when the paddle 2 is rotated to the uppermost position shown in fig. 1, water is discharged through the one-way water stop valve 15 due to gravity. The one-way stop valve 15 allows water in the water storage tank 121 to flow out through the water discharge pipe 122, but cannot flow back to the water storage tank 121. In other words, "leaktightness" and "drainage" of the root of the blade 2 can be achieved without requiring particularly complex operations or complex protective structures at all. Greatly reduces the maintenance frequency of the horizontal shaft water turbine and prolongs the service life of the horizontal shaft water turbine. In addition, for double insurance, a liquid level sensor (not shown) may be additionally provided to detect the water level in the water storage tank 121. When the water leakage amount is larger than the preset value, the aged and loose sealing element can be found in time and replaced.

Preferably, the main shaft 4 of the present embodiment is internally configured to allow a service person to pass through, and the main shaft 4 is respectively provided with service ports 41 and 42 at the first capsule 5 and the second capsule 6, through which the service person can enter and exit. At this time, the service person can enter the first sealed cabin 5 through the second sealed cabin 6, firstly through the service opening 42, then through the main shaft 4 and through the service opening 41. However, the present invention is not limited thereto. In other embodiments, the main shaft 4 may not allow access to the service person, and there may be other ways to allow access to the first capsule 5 from the second capsule 6.

In this embodiment, the sealing system 10 further includes at least one second sealing member 14 disposed on a side of the at least one first sealing member 11 adjacent to the seawater. Wherein, at least one second sealing member 14 does not seal when ocean power generation facility normal operating, and at least one first sealing member 11 plays sealed effect when ocean power generation facility normal operating, and when needs demolish or change at least one first sealing member 11, at least one second sealing member 14 work realizes sealed effect.

It is because the second seal 14 performs a sealing function at a specific time, and the first seal 11 can be directly removed or replaced. Direct removal or replacement of the first seal 11 would result in water leakage from the device if the second seal 14 were not present to provide a sealed environment. If the second sealing member 14 always performs the sealing function rather than the sealing function at a specific moment, the second sealing member 14 is inevitably aged and loosened after a long period of operation, and a sealing environment cannot be provided for the replacement of the first sealing member 11.

If the first sealing members 11 are a plurality of first sealing members 11, the outermost first sealing member 11 may be directly removed, and then the remaining plurality of first sealing members 11 may be displaced to the outside. At this time, although the outermost first sealing member 11 is failed, the inner first sealing member 11 initially installed at the same time can still effectively exert the sealing function, so that the service life of the first sealing member 11 is greatly prolonged, and the problem that the whole sealing member needs to be replaced as long as the sealing member is loosened in the prior art is completely avoided. However, the present invention is not limited thereto. In other embodiments, the first sealing member 11 may be a single piece, and if the first sealing member 11 is loose, the first sealing member 11 needs to be replaced.

Among the prior art, if need change the sealing member, must hang out the surface of water from the sea with whole ocean power generation facility to will demolish the change that partial device just can carry out the sealing member, consume a large amount of manpower and materials, make cost of maintenance high. However, in the ocean power generation device of the embodiment, the maintainer can enter the first sealed cabin 5 through the second sealed cabin 6, and the first sealing element 11 can be directly removed and replaced in the first sealed cabin 5, so that the underwater removal or replacement of the sealing element becomes possible, the maintenance cost is greatly reduced, and the commercial development of the ocean power generation device is promoted. And the underwater dismounting or the replacement of the sealing element is convenient and quick without dismounting the whole device.

In this embodiment, the sealing system further comprises at least one third sealing element 18, which is located on the side of the at least one first sealing element 11 close to the sea water to protect against silt. The ocean power plant of this embodiment employs three different seals 18, 14, 11. Specifically, the blade bushing 21 is fixed to the blade shaft (i.e., the root of the blade 2) by interference. The paddle bushing 21 provides a shoulder location in the axial direction of the paddle for the mounting of the third seal 18 and forms a seal groove with the pressure plate 22 for securing the third seal 18. To facilitate the smooth installation of the third seal member 18 in the seal groove, the pressing plate 22 is formed in a half-and-half (half) or more half structure, and is bolted to the blade bushing 21.

The third sealing element 18 closest to the sea water can be a J-shaped lip-shaped sealing ring, interference is formed between the elastic tension of the third sealing element and the blade shaft sleeve 21, the third sealing element is radially pressed and in contact with the blade shaft sleeve, and therefore invasion of silt and impurities in the sea water is effectively prevented. The lip-shaped sealing ring has better mobility and adaptability, has smaller tolerance fit than other sealing elements, and can make up the problem of axial center deviation of a rotating blade shaft due to radial sealing. Preferably, at least two third seals 18 are provided to provide safety redundancy. Preferably, the third sealing member 18 is made of a composite polymer material. The utility model discloses do not limit to the concrete structure and the mounting means of third sealing member 18.

In this embodiment, the second sealing member 14 may be an air shroud-type service air seal. The second sealing element 14 is fixed in a sealing cavity formed by the sealing seat 23 and the inner cover plate 24, the inner cover plate 24 is provided with a gas-filled pipe joint 25 with a certain length, and the inner cover plate 24 is fixed on the sealing seat 23 through bolts. When the ocean power generation device works normally, a certain gap is kept between the sealing lip part of the second sealing element 14 and the surface of the blade shaft. When first sealing member 11 needs to be changed, second sealing member 14 need seal promptly, and the accessible is external to be connected the pressure trachea, keeps the gas of certain pressure and makes the air shroud lip protrusion, forms the contact seal of holding tightly with the surface of blade axle, prevents effectively that the sea water seepage from going into in the first seal chamber 5. Preferably, the second sealing member 14 is made of a composite polymer material.

The present invention is not limited to the specific structure and installation manner of the second sealing member 14. In other embodiments, the second sealing element 14 may be a metal sealing element, and the metal sealing element may be attached to a servomotor for providing power to move the metal sealing element along the radial direction of the blade shaft. In addition, displacement feedback can be arranged, so that the formation of the servomotor is kept within an error allowable range.

In this embodiment, the first sealing element 11 may be a V-shaped seal, and is fixed in a sealing cavity formed by the inner cover plate 24 and the gland 26, and the inner and outer diameters of the first sealing element 11 form an interference radial pressing contact seal with the surface of the blade shaft and the surface of the inner cover plate 24, so as to ensure zero leakage of seawater. The gland 26 may be of a half-and-half (half) or majority structure that is bolted together and removably secured to the inner cover plate 24. When the first sealing member 11 is replaced, the gland 26 can be disassembled in half, the original first sealing member 11 is destroyed and disassembled, then a new first sealing member is installed, and the gland 26 is reinstalled. Like this first sealing member 11 is changed simply, can not hang out the surface of water and do not dismantle under the condition of spare part at whole generating set, need not occupy a large amount of time limit for a project, need not to pull down the paddle and can maintain the change. Preferably, the first sealing member 11 is made of a composite polymer material. The utility model discloses do not limit to the concrete structure and the mounting means of first sealing member 11.

The sealing element made of the composite high polymer material is resistant to hydrolysis and seawater corrosion, and has lower abrasion loss and excellent aging resistance; the anti extrusion ability is strong, has reduced the risk that silt, impurity invade first sealed cabin. The mountable type is strong, the sealing size is not limited, and the split mounting or the field hot melting bonding mounting can be realized.

The hub 1 of the horizontal axis turbine and the main shaft 4 (i.e. the transmission shaft) of the generator 3 are respectively arranged in the two sealed cabins in a penetrating way, so that the sealing system arranged at the joint of the main shaft and the second sealed cabin 6 also faces similar problems. In the second embodiment, the ocean power plant comprises a sealing system 10' arranged on the main shaft 4. In other words, the utility model provides a sealing system both can set up at the root of paddle 2, can set up again on the main shaft 4 of connecting wheel hub 1 and generator 3. The sealing system 10' arranged on the main shaft 4 is similar to the sealing system 10 arranged on the root of the blade 2. All of the structures or components utilized in the sealing system 10 'of the first embodiment may be utilized in the sealing system 10'.

As shown in fig. 1 and 4, the sealing system 10 ' includes at least one first seal 11 ' and a water leakage protection device 12 '. The leakage protector 12 ' is located on the side of the at least one first sealing member 11 ' away from the sea water, and the leakage protector 12 ' includes a sealed water storage chamber 121 ' and a drain pipe 122 '. The sealed storage tank 121 'collects and stores the seawater leaked from the at least one first sealing 11'. One end of the water discharge pipe 122 'is communicated with the sealed water storage tank 121', and the seawater stored in the sealed water storage tank 121 'is discharged through the water discharge pipe 122'.

The utility model discloses the relevant characteristic in the embodiment of each application can carry out the independent assortment combination according to actual need, and these are all in the utility model discloses the within range that will protect. For example, the ocean power plant of the second embodiment may also have the second seal 14' of the first embodiment. The second seal 14 'is located on the side of the at least one first seal 11' adjacent to the sea (i.e., the left side as shown). When the first sealing member 11 ' needs to be replaced, the at least one second sealing member 14 ' does not seal when the ocean power generation device works normally, the at least one first sealing member 11 ' plays a sealing role when the ocean power generation device works normally, and when the at least one first sealing member 11 ' needs to be removed or replaced, the at least one second sealing member 14 ' works to achieve the sealing role. The first seal 11 'and the second seal 14' may be of the type shown in the first embodiment.

If the first sealing member 11 ' has a plurality of first sealing members, the outermost first sealing member 11 ' may be directly removed, and then the remaining plurality of first sealing members 11 ' may be displaced to the outside (left side in the drawing). The problem that the whole sealing element needs to be replaced as long as the sealing element is loosened in the prior art is completely avoided. However, the present invention is not limited thereto. In other embodiments, the first sealing member 11 ' may be a single piece, and if the first sealing member 11 ' is loose, the first sealing member 11 ' needs to be replaced. In particular, the service personnel can enter the first sealed cabin 5 through the second sealed cabin 6, and directly realize underwater removal or replacement of the sealing member.

The utility model discloses a sealing system can set up in the any sealed place of needs of ocean power generation facility, and this is all the utility model discloses in the protection scope of application. It is also within the scope of the present invention to provide the sealing system 10' only on the main shaft 4, and not to provide the sealing system 10 at the root of the blade 2. Although fig. 1 depicts both the sealing system 10 arranged at the root of the blade 2 and the sealing system 10' arranged on the main shaft 4, these two sealing systems may be present independently. I.e. the marine power plant may have only the sealing system 10 arranged at the root of the blade 2 or only the sealing system 10' arranged on the main shaft 4.

To sum up, the utility model discloses sealing system 10 sets up in the root of paddle 2, can form completely cut off wheel hub 1 and outside sea water, has prevented effectively that the sea water seepage that contains silt, impurity from advancing wheel hub 1 inside, really realizes zero seepage to ensure that generating set can open oar and feathering smoothly under each operating mode, realized the operation of unit safety and stability. Similarly, the utility model discloses sealing system 10' of embodiment sets up on main shaft 4, can form the electronic components (for example generator 3) and the sea water in the second sealed cabin 6 completely cut off, has prevented effectively that the sea water seepage that contains silt, impurity from getting into the inside of second sealed cabin 6, realizes zero seepage.

The problem of sealing is a crucial issue for the long term stable and efficient power generation of marine power generation devices, but is easily ignored by those skilled in the art. Because the prior art can not consider that the maintainer enters into the underwater and directly overhauls, never consider the problem of changing the sealing member under the water. In particular, existing sealing structures are used for at most five years, in other words, five years is that the entire generator set must be lifted out of the sea anyway for seal replacement. Not to mention that in practice the seal is not used at all for more than five years due to the complex environment of the ocean. If the sealing element needs to be replaced in the prior art, the whole ocean power generation device needs to be lifted out of the water surface, and then most parts of the hub and the blade of the horizontal axis water turbine are dismantled, so that the sealing element can be really replaced. In an embodiment, the utility model discloses can not hang out the surface of water and not dismantle under the circumstances of wheel hub spare part at generating set, realize the artifical change under water of sealing member, maintain more convenient and save time to the life of whole unit has been prolonged.

Particularly, the utility model discloses can set up sealing system into the multichannel sealed, ensure zero seepage. Secondly, even if the first sealing element on the outer side has reduced sealing performance or fails due to long-term use, the second sealing element (such as an inflatable sealing) is started to isolate the seawater on the outer side, so that the sealing element of the ocean power generation device can be replaced. In one embodiment, a service person may enter the second capsule and then enter the first capsule to remove or replace the first seal that has failed. Through the arrangement, the direct replacement of the sealing element becomes possible, and the defect that the sealing element can be removed or replaced only by lifting the whole ocean power generation device out of the sea in the prior art is avoided. The ocean power generation device can operate underwater for a long time without spending a large amount of manpower and material resources to be lifted out of the sea surface for overhauling. The maintenance cost of the existing maintenance method is greatly reduced, the maintenance efficiency is improved, and the ocean power generation device can be actually applied in a commercial mode. And the maintainers can overhaul the sealing elements in the device, so that the overhauling operation is convenient.

Although the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of other modifications and variations without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A sealing system suitable for an ocean power generation device, the ocean power generation device is provided with at least two variable-pitch blades, the sealing system is correspondingly arranged at the root of each blade, and the sealing system is characterized by comprising:

at least one first seal member;

the protection device that leaks is located one side that sea water was kept away from to at least one first sealing member, and the protection device that leaks includes:

a sealed water storage bin for collecting and storing the seawater leaked from the at least one first sealing element;

and one end of the water discharge pipe is communicated with the sealed water storage bin, and the seawater stored in the sealed water storage bin is discharged through the water discharge pipe.

2. The sealing system of claim 1, further comprising at least one second sealing member located on a side of the at least one first sealing member adjacent to the seawater, wherein the at least one second sealing member does not seal during normal operation of the marine power plant, wherein the at least one first sealing member performs a sealing function during normal operation of the marine power plant, and wherein the at least one second sealing member performs a sealing function when the at least one first sealing member needs to be removed or replaced.

3. The sealing system of claim 2, further comprising at least one third seal positioned on a side of the at least one first seal adjacent the sea to resist silt.

4. The sealing system of any one of claims 1-3, further comprising a one-way stop valve in the conduit of the drain.

5. The sealing system of any one of claims 1 to 3, wherein the bottom of the water storage compartment is inclined from the position close to the first sealing member to the position away from the first sealing member, and the water discharge pipe is communicated with the lowest position of the bottom of the water storage compartment.

6. The seal system according to any one of claims 1 to 3, wherein the marine power generation device comprises a hub, a generator, a main shaft connecting the hub and the generator, a first sealed chamber and a second sealed chamber, the hub is located in the first sealed chamber, the generator is located in the first sealed chamber or the second sealed chamber, the first sealed chamber rotates with the hub, the second sealed chamber is relatively stationary, and the other end of the drain pipe passes through the interior of the main shaft to discharge the seawater stored in the water storage chamber into the second sealed chamber.

7. The sealing system of claim 6, further comprising a water collection sump located within the second capsule for collecting seawater discharged from the drain, and a water pump for pumping seawater in the water collection sump above the water surface for discharge.

8. The sealing system of claim 7, wherein the ocean power generating device further comprises an outer shaft, one end of the outer shaft is communicated with the second sealed cabin, the other end of the outer shaft is positioned above the water surface, and the water pump pumps the seawater in the water collecting tank to the position above the water surface through the outer shaft for discharging.

9. Sealing system according to any of claims 1-3, wherein said at least one first sealing member and/or said water leakage protection means is of a half-and-half or multi-half construction.

10. The utility model provides a sealing system, is applicable to ocean power generation facility, ocean power generation facility includes wheel hub, generator, connects the main shaft of wheel hub and generator, sealing system sets up on the main shaft, its characterized in that, sealing system includes:

at least one first seal member;

the protection device that leaks is located one side that sea water was kept away from to at least one first sealing member, and the protection device that leaks includes:

a sealed water storage bin for collecting and storing the seawater leaked from the at least one first sealing element;

and one end of the water discharge pipe is communicated with the sealed water storage bin, and the seawater stored in the sealed water storage bin is discharged through the water discharge pipe.

Images