CN117627874A - Fan support arm supporting device with lifting and unfolding functions - Google Patents

Abstract

The invention discloses a fan support arm support device with a lifting and retracting function, which includes an L-shaped support arm for installing a wind turbine nacelle. The L-shaped support arm includes a longer unit support arm and a shorter counterweight support. The unit support arm and the counterweight support arm are connected to each other and are provided with a hinged mounting base for installing the L-shaped support arm in the middle. The counterweight support arm is also connected with a relative hinged mounting seat for driving the L-shaped support arm. A driving mechanism that rotates to adjust the height of the center of gravity of the fan installed at the end of the unit's arm. The invention can realize the adjustment of the center of gravity of the unit, so that the height of the center of gravity of the end of the arm of the unit is different at different rotation angles of the arm, solving the problem of high and unadjustable center of gravity of the wind turbine in the traditional column tower, and improving the typhoon resistance of the wind turbine in far-reaching sea areas. It is safe under extreme working conditions and has the advantages of lightweight, stable structure and adjustable center of gravity.

Description

A fan support arm support device with lifting and retracting functions

Technical field

The invention relates to wind power generation equipment, and in particular to a fan arm support device with a lifting and retracting function.

Background technique

Wind energy promotes clean and low-carbon energy generation. Offshore wind power can break through the space limitations of land wind power, make full use of wind energy, and effectively reduce the impact on the ecological environment. Compared with offshore wind power, offshore wind power is less affected by the inland and has more exploitable wind energy resources. Therefore, offshore wind power is gradually developing towards resource-rich and stable deep-sea areas. The application of fixed generator sets requires preliminary evaluation and extensive installation work taking into account the characteristics of seabed mud and rocks, and requires ongoing maintenance work in the later stages. In contrast, offshore floating wind turbines have loose requirements for seabed geological conditions and are applicable to a wide range of sea areas. Especially in deep sea areas, they have very significant cost advantages, making them the preferred technical route for wind power generation in deep sea areas.

However, most of the current technical routes for large-capacity offshore floating wind turbines have shortcomings. Obviously, the support of conventional offshore floating wind turbines usually adopts the form of column tower structure. The center of gravity of the wind turbine is high and its position cannot be adjusted. As a result, its ability to resist typhoon overturning completely relies on the high stability and large displacement of the platform, resulting in The high cost of platform construction and the difficulty of offshore installation severely restrict the large-scale application of conventional tower-supported wind turbine floating platforms in deep sea environments. Therefore, how to improve the safety of floating wind turbines in extreme operating conditions in far-reaching sea areas is currently a key issue in reliable power generation in the field of offshore wind power.

Contents of the invention

Technical problems to be solved by the present invention: In view of the above-mentioned problems of the prior art, a fan support arm support device with lifting and retracting functions is provided. The present invention can realize the adjustment of the center of gravity of the unit, so that the support arm can support the unit at different rotation angles. The height of the center of gravity at the end of the arm is different, which solves the problem of high and unadjustable center of gravity of traditional column towers, and improves the safety of wind turbines in extreme working conditions such as typhoons in far-reaching sea areas. It is lightweight, structurally stable, and has an adjustable center of gravity. The advantages.

In order to solve the above technical problems, the technical solution adopted by the present invention is:

The invention provides a fan support arm support device with a lifting and retracting function, which includes an L-shaped support arm for installing the wind turbine nacelle. The L-shaped support arm includes a longer unit support arm and a shorter counterweight support arm. , the unit support arm and the counterweight support arm are connected to each other and are provided with a hinged mounting base for mounting the L-shaped support arm in the middle. The counterweight support arm is also connected with a hinged mounting base for driving the L-shaped support arm to rotate relative to the hinged mounting seat. The driving mechanism is used to adjust the height of the center of gravity of the fan installed at the end of the arm of the unit.

Optionally, a counterweight water tank is provided at the end of the counterweight arm, and an electronic drain valve and a water inlet with a water pump are provided on the counterweight water tank for controlled adjustment of the water capacity in the counterweight water tank.

Optionally, the lower part of the counterweight water tank is provided with a counterweight support for installation and fixed installation on the fan base, and the top surface of the counterweight support is provided with a positioning groove for use when the fan is working to generate electricity. When placing the counterweight water tank into the positioning groove, the counterweight water tank is fixed. The surface of the positioning groove is provided with a buffer layer to prevent deformation of the counterweight water tank.

Optionally, the counterweight support is cylindrical, and the positioning groove is an arc-shaped groove.

Optionally, both the unit support arm and the counterweight support arm are hollow structures, and annular reinforcing ribs are provided inside the space structure.

Optionally, a reinforcing connecting rod is also connected between the unit support arm and the counterweight support arm, and the reinforcing connecting rod, the unit support arm and the counterweight support arm are arranged in a triangle.

Optionally, the angle between the unit support arm and the counterweight support arm is an obtuse angle, the driving mechanism is a hoisting mechanism, and the traction rope of the hoisting mechanism is connected to the counterweight support arm.

Optionally, the hoisting mechanism has two traction ropes with opposite traction directions, and each traction rope is connected to one of the fan arm support devices with lifting and retracting functions, so that the two fan supports can The arm support device shares the same winch mechanism.

Optionally, the hoisting mechanism is located in the middle of two fan arm support devices sharing the same hoisting mechanism, and the two fan arm support devices sharing the same hoisting mechanism are arranged symmetrically with respect to the hoisting mechanism.

Optionally, when the driving mechanism drives the L-shaped arm to rotate relative to the hinged mounting base to adjust the height of the center of gravity of the fan installed at the end of the unit's arm, the rotation surface is parallel to the fan sweep surface of the fan installed at the end of the unit's arm.

Compared with the prior art, the present invention mainly has the following advantages: the fan arm support device of the present invention includes an L-shaped arm for installing the wind turbine nacelle, and the L-shaped arm includes a longer unit arm and a relatively long arm. A short counterweight support arm. The unit support arm and the counterweight support arm are connected to each other and have a hinged mounting base for installing the L-shaped support arm in the middle. The counterweight support arm is also connected to a hinge for driving the L-shaped support arm. The arm rotates relative to the hinged mounting base to adjust the height of the center of gravity of the fan installed at the end of the unit's arm. This allows the unit's center of gravity to be adjusted, so that the L-shaped arm has different heights at the end of the unit's arm at different rotation angles, solving the traditional problem of The vertical center of gravity of the wind turbine is high and cannot be adjusted. This improves the safety of wind turbines in extreme working conditions such as typhoons in far-reaching seas. It has the advantages of lightweight, stable structure and adjustable center of gravity.

Description of drawings

Figure 1 is a schematic structural diagram of the working state of the fan arm support device according to the embodiment of the present invention.

Figure 2 is a schematic structural diagram of the fan arm support device in a typhoon-resistant state according to the embodiment of the present invention.

Figure 3 is a schematic structural diagram of the joint working state of the fan arm support device according to the embodiment of the present invention.

Figure 4 is a schematic structural diagram of the fan arm support device in a combined typhoon-resistant state according to the embodiment of the present invention.

Legend: 1. Unit support arm; 2. Counterweight support arm; 3. Counterweight water tank; 4. Reinforced connecting rod; 5. Counterweight support; 6. Driving mechanism; 7. Articulated mounting base.

Detailed ways

As shown in Figures 1 and 2, this embodiment provides a fan arm support device with lifting and retracting functions, including an L-shaped arm for installing the wind turbine nacelle. The L-shaped arm includes a longer unit arm. 1 and a shorter counterweight arm 2. The unit arm 1 and the counterweight arm 2 are connected to each other and have a hinged mounting base 7 for installing the L-shaped arm in the middle. The counterweight arm 2 is also connected to The driving mechanism 6 drives the L-shaped arm to rotate relative to the hinged mounting base 7 to adjust the height of the center of gravity of the fan installed at the end of the unit's arm 1, thereby enabling the unit's center of gravity to be adjusted, so that the L-shaped arm can support the unit at different rotation angles. 1. The height of the center of gravity at the end is different, which solves the problem of high and unadjustable center of gravity of traditional column towers, improves the safety of wind turbines in extreme working conditions such as typhoons in far-reaching sea areas, and has lightweight, stable structure and adjustable center of gravity. The advantages.

As shown in Figures 1 and 2, in this embodiment, the end of the counterweight arm 2 is provided with a counterweight water tank 3. The counterweight water tank 3 is provided with an electronic drain valve and a water inlet with a water pump for controlled adjustment. Water capacity in counterweight tank 3. The counterweight water tank 3 stores seawater inside, so that the weight of the arm formed by the counterweight arm 2 and the counterweight water tank 3 is equal to the weight of the unit arm 1 and the arm on the other side where the engine room and the impeller set are installed at the end. Similar (but not equal), reducing the moment difference between the left and right sides can reduce the stress on the L-shaped arm. Moreover, the end of the counterweight arm 2 is used to fix the counterweight water tank 3. By adjusting the seawater capacity inside the counterweight water tank 3 during the lifting and retracting process, the mass distribution of the entire L-shaped arm is improved, and the problem of lifting and retracting the L-shaped arm is solved. The problem of excessive stress on the system load and support arm during the process.

As shown in Figures 1 and 2, in this embodiment, the lower part of the counterweight water tank 3 is provided with a counterweight support 5 for installation and fixed installation on the fan base. The top surface of the counterweight support 5 is provided with a positioning groove to It is used to cooperate with and fix the counterweight water tank 3 when the counterweight water tank 3 is put into the positioning groove when the fan is working and generating electricity. A buffer layer is provided on the surface of the positioning groove to prevent the counterweight water tank 3 from deforming. In this embodiment, the counterweight support 5 is cylindrical, the positioning groove is an arc-shaped groove, and the contact surface is larger. The force between the counterweight water tank 3 and the positioning groove can be dispersed to the arc-shaped contact surface. , the protection effect of preventing the deformation of the counterweight water tank 3 is better. In this embodiment, the counterweight water tank 3 stores seawater inside to increase the mass on the lower end side of the counterweight arm 2, thereby improving the mass distribution of the L-shaped arm. The counterweight moment on the 2nd side of the counterweight arm is equivalent to the total moment of the wind turbine and tower on the 1st side of the unit support arm. This not only reduces the system load of the hinge system, but also helps to realize the adjustable center of gravity of the wind turbine unit.

In this embodiment, the length of the unit support arm 1 is 107 meters, and the length of the counterweight support arm 2 is 38.05 meters. The unit support arm 1 and the counterweight support arm 2 are preferably made of low-density, high-strength materials. For example, in this embodiment, the unit support arm 1 and the counterweight support arm 2 are made of coated Q960E steel, which has both lightweight and fatigue resistance. The tower sections of support arm 1 and counterweight support arm 2 are elliptical. The long axis of the elliptical cross section of unit support arm 1 is 4 meters and the short axis is 2 meters. The long axis of the elliptical cross section of counterweight support arm 2 is 6 meters. The short axis length is 3 meters.

In order to solve the requirements for lightweight, fatigue resistance and bending resistance of the fan support device under extreme working conditions such as typhoons, in this embodiment, the unit support arm 1 and the counterweight support arm 2 are both cavity structures, and the internal design of the space structure There are annular reinforcing ribs. The annular reinforcing ribs can enhance the strength of the unit support arm 1 and the counterweight arm 2 to meet the requirements for lightweight, fatigue resistance and bending resistance of the fan support device under extreme working conditions such as typhoons. As an optional implementation, in this embodiment, the spacing between the annular reinforcing ribs is 0.8 meters, the spacing between the longitudinal reinforcing ribs is 0.5 meters, and transverse partitions with holes in the middle are installed every 4 meters.

As shown in Figures 1 and 2, in this embodiment, a reinforced connecting rod 4 is also connected between the unit support arm 1 and the counterweight support arm 2. The reinforced connecting rod 4, the unit support arm 1 and the counterweight support arm 2 Arranged in a triangular shape. By strengthening the connecting rod 4, the unit support arm 1 and the counterweight support arm 2 in a triangular arrangement, a triangular stable structure is formed, which solves the problem of lack of structural stability of the unit under extreme conditions such as typhoons. The number of reinforcing connecting rods 4 can be selected according to needs. In this embodiment, the number of reinforcing connecting rods 4 is two. In addition, more can be used, so that multiple smaller reinforcing connecting rods 4 can be used at a lower cost. Higher structural strength.

In order to simplify the rotational driving mechanism of the L-shaped arm, as shown in Figures 3 and 4, in this embodiment, the angle between the unit arm 1 and the counterweight arm 2 is an obtuse angle, and the driving mechanism 6 is a hoisting mechanism. The traction rope is connected to the counterweight arm 2. Since the angle between the unit arm 1 and the counterweight arm 2 is an obtuse angle, the opening angle of the unit arm 1 is less than 90°, so that the self-weight of the unit arm 1 can be utilized. To realize the lowering adjustment of the center of gravity of the unit support arm 1, and the driving mechanism 6 only needs to provide a winch mechanism with one-way pulling force, which greatly simplifies the structure and volume of the driving mechanism 6.

In order to further solve the problem of lack of structural stability of the unit under extreme working conditions such as typhoons, as shown in Figures 3 and 4, the winch mechanism in this embodiment has two traction ropes with opposite traction directions, and each traction rope has its own Connected to a fan arm support device with a lifting and retracting function, the two fan arm support devices share the same winch mechanism. By using a winch to drive the left and right fan arm support devices at the same time, it ensures that both sides The force balance of the fan arm support device can solve the problem of lack of structural stability of the unit under extreme conditions such as typhoons.

In this embodiment, the hoisting mechanism is located in the middle of the two fan arm support devices sharing the same hoisting mechanism, and the two fan arm support devices sharing the same hoisting mechanism are arranged symmetrically with respect to the hoisting mechanism.

In this embodiment, when the driving mechanism 6 drives the L-shaped arm to rotate relative to the hinged mounting base 7 to adjust the height of the center of gravity of the fan installed at the end of the unit's arm 1, the rotating surface is in contact with the fan sweep surface of the fan installed at the end of the unit's arm 1. Parallel, the support arm rotates in the vertical direction to adjust the center of gravity, and the rotation area is always parallel to the sweeping surface of the fan. This solves the problem that during the lifting and lowering of the existing adjustable center of gravity support arm, the fan is not facing the incoming wind and the blades are unevenly stressed. question. There is no doubt that based on the demand for driving the counterweight arm 2, the driving mechanism 6 can adopt the required implementation methods as needed, including electric, hydraulic drive, and pneumatic drive methods. Various driving modes can also be used as needed. Direct drive or indirect drive through transmission mechanism. As an optional implementation, in this embodiment, the driving mechanism 6 is a hoisting mechanism. The traction rope of the hoisting mechanism is connected to the counterweight arm 2. The lifting function is realized through the hoisting mechanism. The hoisting mechanism is tightened under normal power generation conditions. Erect the L-shaped support arm, and relax the winch mechanism to lower the L-shaped support arm under the cut-out condition to lower the center of gravity.

The working process of the wind turbine arm support device with lifting and retracting functions in this embodiment is as follows: Referring to Figure 1, under the normal power generation condition of the wind turbine unit, the driving mechanism 6 tightens the traction rope (or hinge), and in the process, the unit is driven to support The arm 1 rises with the hinged mounting base 7 as the axis, the counterweight arm 2 is lowered, and the counterweight water tank 3 connected to the counterweight arm 2 is placed on the counterweight support 5 to realize the rise of the center of gravity of the wind turbine. At this time, the mass on the 2nd side of the counterweight arm is equivalent to the mass on the 1st side of the unit's arm, which reduces the moment difference between the two sides and the stress on the arm. After completing the above process, the hinge is fixed through the locking system of the driving mechanism 6 to ensure that the L-shaped arm no longer moves. Referring to Figure 2, under the typhoon-resistant cutting-out condition of the wind turbine, the driving mechanism 6 relaxes the traction rope (or hinge) to a certain length and then fixes it. In the process, it drives the unit support arm 1 to lower with the hinged mounting base 7 as the axis. The weight arm 2 rises, and the counterweight water tank 3 connected to the counterweight arm 2 is lifted from the counterweight support 5, thereby lowering the center of gravity of the wind turbine. At this time, the mass from the counterweight water tank 3 is added to the 2nd side of the counterweight arm. The total mass is equivalent to the mass on the 1st side of the unit's arm, which reduces the moment difference between the two sides and greatly reduces the stress on the arm. . After completing the above process, fix the traction rope (or hinge) through the locking system of the driving mechanism 6 to ensure that the L-shaped arm no longer moves.

To sum up, the wind turbine arm support device of this embodiment includes an L-shaped arm for installing the wind turbine nacelle. The arm is made of low-density, high-strength material and has annular reinforcing ribs inside, which can meet extreme working conditions such as typhoons. The demand for lightweight, fatigue resistance and bending resistance of fan support devices is lowered. In the fan support arm support device of this embodiment, the unit support arm and the counterweight support arm are connected to each other and have a hinged mounting base in the middle. The unit support arm and the counterweight support arm have different lengths and the angle between them is through the pin shaft. It is fixed at an obtuse angle, so that the height of the center of gravity at the end of the unit's arm is different at different rotation angles of the L-shaped arm. In the fan arm support device of this embodiment, a counterweight water tank is fixed at the end of the counterweight arm to store seawater to improve mass distribution, which greatly reduces the system load of the hinge system and the stress on the arm during the lifting and retracting process. The counterweight arm in the fan arm support device of this embodiment is also connected to a driving mechanism for driving the L-shaped arm to rotate vertically relative to the hinged mounting base to adjust the height of the center of gravity at the end of the unit's arm to ensure that the arm can be raised, lowered, and retracted. During the process, the wind turbine is facing the incoming wind, the blades are evenly stressed, and a locking system is provided to fix the arm after adjusting the center of gravity. In the fan arm support device of this embodiment, more than two reinforced connecting rods are used to connect the ends of the unit arm and the counterweight arm to form a triangular arrangement, and a winch is used to simultaneously drive the L-shaped arms on the left and right sides. Ensure that the forces on both sides of the support device are balanced, which can improve the stability of the overall structure of the device under extreme conditions such as typhoons. The wind turbine arm support device of this embodiment can realize the adjustment of the center of gravity of the unit, improve the safety of the wind turbine unit in extreme working conditions such as typhoons in far-reaching sea areas, and has the advantages of lightweight, stable structure, and adjustable center of gravity.

The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above-mentioned embodiments. All technical solutions that fall under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and modifications may be made without departing from the principles of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (10)

1. A fan support arm support device with a lifting and retracting function, characterized in that it includes an L-shaped support arm for installing the wind turbine nacelle, and the L-shaped support arm includes a longer unit support arm (1) and a relatively long support arm. The short counterweight support arm (2), the unit support arm (1) and the counterweight support arm (2) are connected to each other and have a hinged mounting base (7) in the middle for installing the L-shaped support arm. The counterweight arm (2) is also connected to a driving mechanism (6) for driving the L-shaped arm to rotate relative to the hinged mounting base (7) to adjust the height of the center of gravity of the fan installed at the end of the unit's arm (1). 2. The fan arm support device with lifting and retracting functions according to claim 1, characterized in that a counterweight water tank (3) is provided at the end of the counterweight support arm (2), and the counterweight water tank (3) is provided with an electronic drain valve and a water inlet with a water pump for controlled adjustment of the water capacity in the counterweight water tank (3). 3. The fan arm support device with lifting and retracting functions according to claim 2, characterized in that the lower part of the counterweight water tank (3) is provided with a counterweight support for installation and fixed installation on the fan base ( 5), the top surface of the counterweight support (5) is provided with a positioning groove, which is used to fix the counterweight water tank (3) when the counterweight water tank (3) is put into the positioning groove when the fan is working and generating electricity. ), a buffer layer is provided on the surface of the positioning groove to prevent the counterweight water tank (3) from deforming. 4. The fan arm support device with lifting and retracting functions according to claim 3, characterized in that the counterweight support (5) is cylindrical and the positioning groove is an arc-shaped groove. 5. The fan arm support device with lifting and retracting functions according to claim 1, characterized in that both the unit arm (1) and the counterweight arm (2) are cavity structures, and the space structure There are annular reinforcing ribs inside. 6. The fan support arm support device with lifting and retracting functions according to claim 5, characterized in that a reinforced connecting rod (2) is also connected between the unit support arm (1) and the counterweight support arm (2). 4), the reinforced connecting rod (4), the unit support arm (1) and the counterweight support arm (2) are arranged in a triangle. 7. The fan support arm support device with lifting and retracting functions according to claim 6, characterized in that the angle between the unit support arm (1) and the counterweight support arm (2) is an obtuse angle, and the The driving mechanism (6) is a hoisting mechanism, and the traction rope of the hoisting mechanism is connected to the counterweight arm (2). 8. The fan arm support device with lifting and retracting functions according to claim 7, characterized in that the hoisting mechanism has two traction ropes with opposite traction directions, and each traction rope is connected to one of the traction ropes. The fan arm support devices with lifting and retracting functions are connected so that the two fan arm support devices share the same winch mechanism. 9. The fan arm supporting device with lifting and retracting functions according to claim 8, characterized in that the hoisting mechanism is located in the middle of the two fan arm supporting devices that share the same hoisting mechanism and share the same hoist. The two fan arm support devices of the structure are arranged symmetrically relative to the winch mechanism. 10. The fan support arm support device with lifting and retracting functions according to claim 9, characterized in that the driving mechanism (6) drives the L-shaped support arm to rotate relative to the hinged mounting base (7) to adjust the unit support arm. (1) When the center of gravity of the fan installed at the end is at the height, the rotating surface is parallel to the sweep surface of the fan installed at the end of the unit support arm (1).