Locking system and wind turbine

Abstract

The present invention relates to a locking system and a wind turbine generator set, the locking system is used to lock the relative position of a first component and a second component of a rotational connection, comprising a base, having a plurality of locking holes, the plurality of locking holes are respectively tapered holes and are spaced and evenly distributed in the circumferential direction of the base, a pin assembly, comprising a first locking pin, a second locking pin and at least one third locking pin respectively plugged and matched with any locking hole; in the circumferential direction, the first locking pin, the second locking pin and the third locking pin are spaced and distributed, the first locking pin is adjacent to the second locking pin and forms a first angle with the second locking pin, the first locking pin forms a second angle with the adjacent third locking pin, the second locking pin forms a third angle with the adjacent third locking pin, the second angle is equal to the third angle and the absolute value of the difference between the second angle and the first angle is greater than zero. The embodiment of the present invention can meet the locking requirements of the impeller.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power, and in particular to a locking system and a wind power generator set. Background Art

[0002] A wind turbine is a device that converts wind energy into electrical energy. When the unit is running, it is necessary to maintain the various devices in the impeller. When maintaining the internal parts of the impeller, the maintenance personnel need to enter the impeller. To ensure the safety of the workers and prevent the impeller from rotating under the action of wind load when maintaining the impeller, the workers must lock the impeller before entering the impeller so that it cannot rotate. Only then can the workers enter the impeller for maintenance operations, thereby ensuring the personal safety of the workers. Some wind turbines also need to lock the impeller when lifting or replacing single blades.

[0003] Traditional impeller locking is usually achieved by inserting a pin installed on a fixed component into a rotating component. For small-power wind turbines, usually one locking pin can bear the maintenance load of the impeller. However, for large wind turbines, especially when lifting and replacing single blades, the load is very large, and it is difficult for a locking pin to carry a huge load. Therefore, multi-pin locking is gradually being studied and used. The problem with the existing locking system with multiple pins working at the same time is that the impeller has the freedom to rotate in both clockwise and counterclockwise directions. After the first pin is inserted, the impeller cannot rotate, and all degrees of freedom are restricted. When the subsequent pins are inserted, the pins of the commonly used solution must have sufficient accuracy to ensure that they are inserted into the ideal position. However, manufacturing deviations are objective and almost inevitable. Therefore, the actual situation of the ordinary locking pin solution is that after the first pin is inserted, the remaining pins will not be completely aligned with the corresponding locking holes, and it is difficult to insert them into the ideal position, which is not conducive to the locking requirements of the impeller. Summary of the invention

[0004] The embodiments of the present invention provide a locking system and a wind turbine generator set. The locking system can realize multi-pin locking to meet the locking requirements of the impeller.

[0005] On the one hand, according to an embodiment of the present invention, a locking system is proposed for locking the relative position of a first component and a second component of a rotational connection, the locking system comprising: a base having a plurality of locking holes, wherein the plurality of locking holes are respectively conical holes and are circumferentially spaced and evenly distributed on the base, and the base can be arranged on the first component; a pin assembly comprising a first locking pin, a second locking pin and at least one third locking pin respectively plugged into and mating with any locking hole; the pin assembly can be arranged on the second component and the first locking pin, the second locking pin and the third locking pin are spaced and distributed circumferentially, the first locking pin is adjacent to the second locking pin and forms a first angle with the second locking pin, a second angle is formed with the first locking pin and the adjacent third locking pin, and a third angle is formed with the second locking pin and the adjacent third locking pin, wherein the second angle is equal to the third angle and the absolute value of the difference between the second angle and the first angle is greater than zero.

[0006] According to one aspect of an embodiment of the present invention, the total number of the first locking pin, the second locking pin and the third locking pin is n, n≥3, the angle value of the first angle is (360° / n)+2a, and the angle values ​​of the second angle and the third angle are respectively (360° / n)-a, where a is a constant.

[0007] According to one aspect of the embodiment of the present invention, the absolute value of a is greater than or equal to 0.02 and less than or equal to 2.

[0008] According to one aspect of the embodiment of the present invention, the number of third locking pins is more than two, the total number n≥4, and in the circumferential direction, a fourth angle is formed between two adjacent third locking pins, and the value of the fourth angle is 360° / n.

[0009] According to one aspect of the embodiments of the present invention, the total number of the first locking pins, the second locking pins and the third locking pins is n, and the number of the locking holes is an integer multiple of n.

[0010] According to one aspect of an embodiment of the present invention, the locking system also includes a driving part, and the first locking pin, the second locking pin and the third locking pin are respectively connected to the driving part, and the driving part drives the first locking pin, the second locking pin and the third locking pin to be inserted into the relatively arranged locking holes or separated from the relatively arranged locking holes according to a predetermined timing.

[0011] According to one aspect of the embodiments of the present invention, the base is disc-shaped, and the plurality of locking holes extend in the axial direction of the base; or, the base is disc-shaped, and the plurality of locking holes extend in the radial direction of the base.

[0012] According to one aspect of an embodiment of the present invention, the locking hole is a conical hole, and the cross-section of the first locking pin, the second locking pin and the third locking pin in their own axial direction is circular; or, the locking hole is a pyramidal hole, and the cross-section of the first locking pin, the second locking pin and the third locking pin in their own axial direction is polygonal.

[0013] According to one aspect of the embodiment of the present invention, the first locking pin, the second locking pin and the third locking pin are all tapered pins and have the same structure.

[0014] On the other hand, according to an embodiment of the present invention, a wind turbine generator set is proposed, including: a first component; a second component, rotatably connected to the first component, and the above-mentioned locking system, a base is arranged on the first component, a pin assembly is arranged on the second component and is arranged facing the base, in the circumferential direction of the base, a first locking pin, a second locking pin and a third locking pin are distributed at intervals, the first locking pin and the second locking pin are arranged adjacent to each other and form a first angle with the second locking pin, a second angle is formed between the first locking pin and the adjacent third locking pin, a third angle is formed between the second locking pin and the adjacent third locking pin, the second angle is equal to the third angle and the absolute value of the difference between the second angle and the first angle is greater than zero.

[0015] According to another aspect of the embodiment of the present invention, one of the first component and the second component is an impeller and the other is a nacelle; or, one of the first component and the second component is a rotor of a generator and the other is a stator of the generator; or, one of the first component and the second component is a moving shaft of a shafting structure and the other is a fixed shaft of the shafting structure.

[0016] According to another aspect of the embodiment of the present invention, the base and the first component are an integral structure.

[0017] According to the locking system and wind turbine generator set provided by the embodiments of the present invention, the locking system includes a base and a pin assembly, the base is provided with a plurality of locking holes spaced apart and evenly arranged, the locking holes are tapered holes, the pin assembly includes a first locking pin, a second locking pin and at least one third locking pin plugged and matched with any locking hole, since the base can be arranged on the first component, the pin assembly can be arranged on the second component, and in the circumferential direction of the base, the first locking pin and the second locking pin can be arranged adjacent to each other and form a first angle with the second locking pin, the first locking pin and the adjacent third locking pin can form a second angle, and the second locking pin and the adjacent third locking pin can form a second angle. A third angle can be formed between adjacent third locking pins, the second angle is equal to the third angle, and the absolute value of the difference between the second angle and the first angle is greater than zero, so that when the to-be-locked component connected to the base is locked in the clockwise direction and the counterclockwise direction, one of the first locking pin and the second locking pin can be in contact with the base on both sides of the annular direction and subjected to force, and the remaining locking pins can be in contact with the base on one side in the annular direction and subjected to force, so that each pin plays a role in the locking process, and can avoid the occurrence of the locking pins being unable to be plugged into the corresponding locking holes due to processing and assembly errors, thereby meeting the locking requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Features, advantages, and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0019] Figure 1 is a schematic structural diagram of a wind turbine generator set according to an embodiment of the present invention;

[0020] Figure 2 is a schematic structural diagram of a locking system according to an embodiment of the present invention;

[0021] Figure 3 yes Figure 2 The cross-sectional view along the AA direction;

[0022] Figure 4 yes Figure 2 The cross-sectional view along the BB direction;

[0023] Figure 5 is a schematic structural diagram of a locking system according to another embodiment of the present invention;

[0024] Figure 6 yes Figure 5 Cross-sectional view along CC direction;

[0025] Figure 7 yes Figure 5 The cross-sectional view along the DD direction;

[0026] Figure 8 It is a structural schematic diagram of a locking system according to yet another embodiment of the present invention.

[0027] in:

[0028] 1- Locking system;

[0029] 10-base; 11-locking hole;

[0030] 21-first locking pin; 22-second locking pin; 23-third locking pin;

[0031] aa-first angle; bb-second angle; cc-third angle; dd-fourth angle;

[0032] 30- driving unit;

[0033] 2-tower; 3-nacelle; 4-generator; 5-impeller; 501-hub; 502-blade; 6-wind turbine foundation; X-circumferential; Y-axial; Z-radial.

[0034] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0035] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed in order to provide a comprehensive understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least part of the known structures and technologies are not shown in order to avoid unnecessary ambiguity of the present invention; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0036] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the locking system and wind turbine generator set of the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" 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 directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0037] In order to better understand the present invention, Figures 1 to 8 A locking system and a wind turbine generator set according to an embodiment of the present invention are described in detail.

[0038] See also Figure 1 An embodiment of the present invention provides a wind turbine generator set, which includes a first component, a second component and a locking system 1, wherein the second component is rotatably connected to the first component, and the locking system 1 is used to lock the relative positions of the first component and the second component.

[0039] In order to meet the requirements of converting wind energy into electrical energy, the wind turbine generator set provided in the embodiment of the present invention may specifically include a wind turbine foundation 6, a tower 2, a nacelle 3, a generator 4, an impeller 5 and a shaft structure (not shown). The tower 2 is arranged on the wind turbine foundation 6, the nacelle 3 is arranged on the tower 2, and the generator 4 is arranged on the nacelle 3, which may be located inside the nacelle 3. Of course, in some examples, it may also be located outside the nacelle 3. The impeller 5 includes a hub 501 and a plurality of blades 502 connected to the hub 501. The hub 501 of the impeller 5 is connected to the rotor of the generator 4 through the moving shaft of the shaft structure, and the fixed shaft of the shaft structure can be connected to the stator of the generator 4 and the nacelle 3. When the wind acts on the blades 502, the blades 502 drive the entire impeller 5 to rotate relative to the nacelle 3, so that the moving shaft drives the rotor of the generator 4 to rotate relative to the stator, thereby realizing power generation.

[0040] One of the first component and the second component mentioned above may be the impeller 5 and the other may be the nacelle 3. Of course, in some examples, one of the first component and the second component is the rotor of the generator 4 and the other may be the stator of the generator 4. Alternatively, one of the first component and the second component is the moving shaft of the shaft system structure and the other may be the fixed shaft of the shaft system structure.

[0041] In order to better meet the locking requirements for the relative positions of the first component and the second component, the embodiment of the present invention further provides a locking system 1, which can be used in the wind turbine generator set of the above embodiment to achieve the locking and unlocking of the relative positions of the impeller 5 and the nacelle 3, the locking and unlocking of the relative positions of the moving shaft and the fixed shaft of the shaft system structure, or the locking and unlocking of the relative positions of the rotor and the stator of the generator 4. Of course, it can also be used in other equipment to lock and unlock the two components that rotate relative to each other.

[0042] Please also refer to 2 to Figure 4The locking system 1 provided by the embodiment of the present invention includes a base 10 and a pin assembly. The base 10 has a plurality of locking holes 11, which are tapered holes and are spaced and evenly distributed in the circumferential direction X of the base 10, and the base 10 can be set on the first component. The pin assembly includes a first locking pin 21, a second locking pin 22 and at least one third locking pin 23, which are respectively plugged and matched with any locking hole 11. The pin assembly can be set on the second component and in the circumferential direction X, the first locking pin 21, the second locking pin 22 and the third locking pin 23 are spaced and distributed, the first locking pin 21 is adjacent to the second locking pin 22 and forms a first angle aa with the second locking pin 22, the first locking pin 21 and the adjacent third locking pin 23 form a second angle bb, and the second locking pin 22 and the adjacent third locking pin 23 form a third angle cc, wherein the second angle bb is equal to the third angle cc and the absolute value of the difference between the second angle bb and the first angle aa is greater than zero.

[0043] Taking the impeller 5 of a wind turbine as an example, it was found through research that the direction of rotation of the wind turbine is fixed when it is working, and through the analysis of the locking load, it can be found that, except for identifiable working conditions such as the hoisting of a single blade 502, the larger locking loads of the wind turbine are all in the same direction, and the other loads in the opposite direction are very small, and basically a single locking pin can meet the requirements. Based on the above research, when the locking system 1 provided in the embodiment of the present invention is used, the base 10 can be set on the hub 501 of the impeller 5, and the pin assembly can be set on the nacelle 3 and arranged opposite to the base 10. The working process is as follows:

[0044] Taking the locking load as the instantaneous clockwise direction, when performing the locking operation, first align the first locking pin 21 with the locking hole 11, drive the first locking pin 21 into the corresponding locking hole 11, and combine the first locking pin 21 with the conical cross-section of the corresponding locking hole 11 of the base 10, so that the first locking pin 21 is in contact with the locking hole 11 on both sides of the base 10 in the circumferential direction X and is subjected to force. At this time, the impeller 5 is completely restricted in the circumferential direction. Then, the second locking pin 22 and the third locking pin 23 are controlled to be inserted into the corresponding locking holes 11. Since the second angle bb is equal to the third angle cc and the absolute value of the difference between the second angle bb and the first angle aa is greater than zero, that is, there is a deviation between the second angle bb and the third angle cc and the first angle aa, and the deviations are equal, and the multiple locking holes 11 are evenly distributed in the annular direction X, after the second locking pin 22 and the third locking pin 23 are inserted into the relative through holes, due to the existence of the deviation, they will contact on the force-bearing side, that is, one-sided force, and when all the locking pins are inserted, the impeller 5 can be well restrained.

[0045] As an optional embodiment, the sum of the number of the first locking pins 21, the second locking pins 22 and the third locking pins 23 is n, and the number of the locking holes 11 is an integer multiple of n. It can be one time, that is, the number of the locking holes 11 is also n, of course, it can also be two times, three times or even more times, and the higher the multiple, the wider the relative locking position between the first component and the second component.

[0046] Taking n as 3 as an example, when the number of locking holes 11 is equal to n, the first component and the second component can only be locked in one relative position. If the number of locking holes 11 is twice that of n, that is, there are six locking holes 11, the six locking holes 11 can be divided into two groups, three in each group, and the deviation of the locking holes 11 between the two groups in the circumferential direction X is 60°. The first locking pin 21, the second locking pin 22 and the third locking pin 23 can respectively cooperate with the two groups of locking holes 11 to achieve the first component being locked relative to the second component at two different positions. By analogy, the higher the multiple, the more relative lockable positions.

[0047] Please continue reading Figures 2 to 4 As an optional implementation, the sum of the number of the first locking pin 21, the second locking pin 22 and the third locking pin 23 is n, n ≥ 3. The angle value of the first angle aa is (360° / n) + 2a, and the angle values ​​of the second angle bb and the third angle cc are (360° / n) - a, respectively, wherein a is a constant, which can be a positive number. Of course, in some embodiments, it can also be a negative number. Through the above arrangement, the relationship requirements between the first angle aa and the second angle bb and the third angle cc can be better met, so that whether locking in the clockwise direction or the counterclockwise direction, it can be ensured that the first locking pin 21, the second locking pin 22 and at least one third locking pin 23 can play a locking role, meeting the multi-pin locking requirements.

[0048] As an optional implementation, the number of the third locking pins 23 is more than two, the sum of the number of the first locking pins 21, the second locking pins 22 and the third locking pins 23 n≥4, and a fourth angle dd is formed between two adjacent third locking pins 23 in the circumferential direction X, and the value of the fourth angle dd is 360° / n. This ensures that the first locking pin 21, the second locking pin 22 and each third locking pin 23 can play a locking role regardless of whether the locking is in the clockwise direction or the counterclockwise direction, so as to better meet the multi-pin locking requirements and ensure the safety and stability of the locking.

[0049] For example, when n is equal to 6 and the number of locking holes 11 is equal to n, the angle value of the first angle aa is 60°+2a, the angle values ​​of the second angle bb and the third angle cc are 60°-a respectively, and the fourth angle is 60°.

[0050] With a being a positive number, when the first component drives the base 10 to rotate clockwise, during the locking operation, the first locking pin 21 is first aligned with the locking hole 11. Under the impetus of the power system, combined with the conical cross-sections of the first locking pin 21 and the locking hole 11, both sides of the first locking pin 21 in the circumferential direction X are in contact with the locking hole 11 and subjected to force. At this time, the impeller 5 is completely restricted in the circumferential direction, forming a Figure 3 The form shown. Then the second locking pin 22 and each third locking pin 23 can be controlled to be inserted into the locking hole 11. Since the angle between the first locking pin 21 and the adjacent third locking pin 23 and the angle between the second locking pin 22 and the adjacent third locking pin 23 in the present invention are a degrees smaller than the angle between the corresponding adjacent locking holes 11 when locked, the adjacent third locking pins 23 will contact and bear force in the counterclockwise direction close to the first locking pin 21 side due to the a degree deviation. Similarly, the remaining third locking pins 23 will also contact on the force-bearing side due to the a degree deviation. At this time, the second locking pin 22 is the same as the remaining third locking pins 23, and is also in unilateral contact on the force-bearing side, forming a Figure 4 When all the locking pins are inserted, the base 10 can be well constrained in the clockwise direction.

[0051] Please also read Figures 5 to 7 Similarly, if the rotation load is counterclockwise, when performing the locking operation, first align the second locking pin 22 with the corresponding locking hole 11. Under the impetus of the power system, combined with the conical cross-section of the second locking pin 22 and the corresponding locking hole 11, the second locking pin 22 will contact the locking hole 11 on both sides and receive force. At this time, the impeller 5 is completely restricted in the circumferential direction, forming Figure 6 The first locking pin 21 and each third locking pin 23 can then be controlled to be inserted into the locking hole 11. Since the angle between the second locking pin 22 and the adjacent third locking pin 23 and the angle between the first locking pin 21 and the adjacent third locking pin 23 in the present invention are smaller by a degree than the angle between the corresponding adjacent locking holes 11 when locked, the adjacent third locking pins 23 will be subjected to contact force in the clockwise direction close to the second locking pin 22 due to the a degree deviation, forming Figure 7 Similarly, the remaining third locking pins 23, due to the a degree deviation, will all contact on the force-bearing side. The first locking pin 21 is the same as the remaining third locking pins 23, and is also in unilateral contact on the force-bearing side. When all the locking pins are inserted, the base 10 can be well constrained in the counterclockwise direction.

[0052] Through the above arrangement, each pin plays a role in the locking process, and can avoid the phenomenon that each locking pin cannot be plugged into and matched with the corresponding locking hole 11 due to processing and assembly errors, thereby meeting the locking requirements.

[0053] In some optional embodiments, the absolute value of a of the locking system 1 provided in the above embodiments can be any value between 0.02° and 2°, including two end values ​​of 0.02° and 2°. In some optional embodiments, it can be selected as any value between 0.03° and 1°, and further selected as about 0.05°. Through the above arrangement, the errors caused by processing and assembly can be reliably absorbed. At the same time, it can be ensured that when one of the first locking pin 21 and the second locking pin 22 is subjected to force on both sides in the annular direction X, the remaining first locking pin 21 and the other of the second locking pin 22 and each third locking pin 23 can be subjected to force on one side in the force direction, thereby realizing multi-pin locking and ensuring safety.

[0054] As an optional implementation, the locking system 1 provided in the above-mentioned embodiments of the present invention has a base 10 that is disk-shaped as a whole and may be a circular disk-shaped structure, and the plurality of locking holes 11 may extend along the axial direction Y of the base 10 respectively.

[0055] Please continue reading Figures 2 to 7 In some optional embodiments, the locking hole 11 may be a pyramid hole, and its cross section in the direction of its own extension may be a polygon. Accordingly, the first locking pin 21, the second locking pin 22, and the third locking pin 23 may be tapered pins whose shapes match the shape of the locking hole 11, and the cross section of each locking pin in its own axial direction is a polygon that matches the shape of the locking hole 11. For example, when the cross section of the locking hole 11 in the direction of its own extension is a quadrilateral, the cross section of each locking pin in the direction of its own extension may also be a quadrilateral and can be plugged into the corresponding locking hole 11.

[0056] Of course, it can be understood that the locking hole 11 being a pyramid hole is only an optional implementation, but is not limited to the above-mentioned implementation. In some embodiments, the locking hole 11 can also be a conical hole, and its cross section in its own extension direction can be circular. Accordingly, the cross section of each of the first locking pin 21, the second locking pin 22, and the third locking pin 23 in its own axial direction is circular, as long as it can meet the requirements of multi-pin locking in different directions.

[0057] As an optional implementation, the locking system 1 provided in the above embodiments further includes a driving unit 30, and the first locking pin 21, the second locking pin 22 and the third locking pin 23 are respectively connected to the driving unit 30, and the driving unit 30 drives the first locking pin 21, the second locking pin 22 and the third locking pin 23 to be inserted into the relatively arranged locking hole 11 or separated from the relatively arranged locking hole 11 according to a predetermined time sequence. The driving unit 30 may include a hydraulic cylinder, so that each of the first locking pin 21, the second locking pin 22 and the third locking pin 23 is connected to a hydraulic cylinder, and the corresponding locking pin is controlled by the extension and contraction of the hydraulic cylinder to move toward the side of the locking hole 11 corresponding to the base 10 to achieve locking, or to control the corresponding locking pin to move toward the side of the locking hole 11 corresponding to the base 10 to achieve unlocking.

[0058] In some optional embodiments, the structures of the first locking pin 21, the second locking pin 22, and the third locking pin 23 provided in the above embodiments may be different. Of course, in some implementations, the structures of the three can be made the same, and different insertion depths can be used to achieve the single-sided or double-sided locking requirements of each locking pin in the circumferential direction X. By making the structures of the first locking pin 21, the second locking pin 22, and the third locking pin 23 the same, the locking pins of the locking system 1 can be mass-produced, easy to mold, and easy to replace.

[0059] It can be understood that the above-mentioned embodiments of the present invention are all described by taking the example that the locking hole 11 extends in the axial direction Y of the base 10 . This is an optional implementation method, but is not limited to the above-mentioned method.

[0060] Please also read Figure 8 In some embodiments, the multiple locking holes 11 of the base 10 can also extend a predetermined distance along the radial direction Z of the base 10, so that when working, the first locking pin 21, the second locking pin 22 and the third locking pin 23 of the pin assembly can be spaced in the circumferential direction X and opposite to the corresponding locking holes 11 in the radial direction Z, which can also meet the locking requirements. This arrangement is suitable for locking the first component and the second component that are at least partially sleeved and rotatably connected to each other, such as locking and unlocking between the moving shaft and the fixed shaft of the shaft system structure of the wind turbine generator set, and locking and unlocking between the rotor and the stator of the generator 4.

[0061] As an optional embodiment, when the locking system 1 is in use, such as when applied to a wind turbine generator set, the base 10 can be an integrated structure with the first component. Through the above-mentioned arrangement, the locking hole 11 can be directly arranged on the first component, such as the hub 501 of the impeller 5, as needed without affecting the performance requirements of the first component, which can also meet the locking and locking requirements.

[0062] It should be noted that the double-sided force mentioned above and below in the present invention means that the corresponding locking pin contacts the hole wall of the corresponding locking hole 11 on both sides of the circumferential direction X. Single-sided force means that the corresponding locking pin contacts the hole wall of the corresponding locking hole 11 on one side of the circumferential direction X.

[0063] The locking system 1 provided in the embodiment of the present invention can be used in a wind turbine generator set to bear the huge load during the hoisting, replacement and maintenance of the single blade 502 of the impeller 5 of the wind turbine generator set, and effectively solves the problem that the strength of a conventional locking pin cannot bear the huge load, and multiple locking pins have assembly interference due to insufficient precision. In addition, whether locking in the clockwise direction or the counterclockwise direction, there is a locking pin that is subjected to force on both sides in the annular direction X, and at least two locking pins are subjected to force on one side in the force direction, which can better meet the force requirements after locking, and multi-pin locking makes the load of the locking system 1 more uniform, which can disperse the force on the motor structure or the shaft structure of the wind turbine generator set, and has a good locking effect and high reliability.

[0064] At the same time, the locking system 1 provided in the embodiment of the present invention, when used in a corresponding use environment, such as locking the impeller 5 in a wind turbine generator set, only needs to connect the base 10 and the pin assembly to the two parts to be locked in relative positions, without increasing the outer diameter size of the impeller 5 or the rotor of the generator 4, thereby avoiding a significant increase in the unit cost caused by using larger-specification locking pins or larger-sized peripheral structures.

[0065] The wind turbine generator set provided in the embodiment of the present invention includes the locking system 1 provided in the above embodiments, which can meet the locking requirements of the relative position of the first rotating component and the second component such as the impeller 5 and the nacelle 3, and can realize multi-pin locking, so that it has higher safety performance.

[0066] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A locking system (1) for locking the relative position of a first component and a second component of a rotational connection, characterized in that: The locking system (1) comprises: A base (10) having a plurality of locking holes (11), wherein the plurality of locking holes (11) are respectively conical holes and are spaced and evenly distributed in a circumferential direction (X) of the base (10), and the base (10) can be arranged on the first component; A pin assembly, comprising a first locking pin (21), a second locking pin (22) and at least one third locking pin (23) respectively plugged into and matched with any of the locking holes (11); The pin assembly can be arranged on the second component and in the annular direction (X), the first locking pin (21), the second locking pin (22) and the third locking pin (23) are spaced apart, one of the first locking pin (21) and the second locking pin (22) is in contact with the base (10) on both sides of the annular direction (X) and receives force, the first locking pin (21) and the second locking pin (22) are arranged adjacent to each other and form a first angle (aa) with the second locking pin (22), a second angle (bb) is formed between the first locking pin (21) and the adjacent third locking pin (23), and a third angle (cc) is formed between the second locking pin (22) and the adjacent third locking pin (23), wherein the second angle (bb) is equal to the third angle (cc) and the absolute value of the difference between the second angle (bb) and the first angle (aa) is greater than zero.

2. The locking system (1) according to claim 1, characterized in that The total number of the first locking pin (21), the second locking pin (22) and the third locking pin (23) is n, n≥3, the angle value of the first angle (aa) is (360° / n)+2a, the angle values ​​of the second angle (bb) and the third angle (cc) are respectively (360° / n)-a, wherein a is a constant.

3. The locking system (1) according to claim 2, characterized in that The absolute value of a is greater than or equal to 0.02 and less than or equal to 2.

4. The locking system (1) according to claim 2, characterized in that The number of the third locking pins (23) is more than two, the total number n is ≥ 4, and in the circumferential direction (X), a fourth angle (dd) is formed between two adjacent third locking pins (23), and the value of the fourth angle (dd) is 360° / n.

5. The locking system (1) according to any one of claims 1 to 4, characterized in that: The total number of the first locking pin (21), the second locking pin (22) and the third locking pin (23) is n, and the number of the locking holes (11) is an integer multiple of n.

6. The locking system (1) according to any one of claims 1 to 4, characterized in that: The locking system (1) further comprises a driving part (30), the first locking pin (21), the second locking pin (22) and the third locking pin (23) being respectively connected to the driving part (30), and the driving part (30) drives the first locking pin (21), the second locking pin (22) and the third locking pin (23) to be inserted into the relatively arranged locking holes (11) or separated from the relatively arranged locking holes (11) according to a predetermined time sequence.

7. The locking system (1) according to any one of claims 1 to 4, characterized in that: The base (10) is disc-shaped, and the plurality of locking holes (11) extend respectively along the axial direction (Y) of the base (10); Alternatively, the base (10) is disc-shaped, and the plurality of locking holes (11) extend respectively along the radial direction (Z) of the base (10).

8. The locking system (1) according to any one of claims 1 to 4, characterized in that: The locking hole (11) is a conical hole, and the cross-section of each of the first locking pin (21), the second locking pin (22) and the third locking pin (23) in the axial direction thereof is circular; Alternatively, the locking hole (11) is a pyramidal hole, and the first locking pin (21), the second locking pin (22) and the third locking pin (23) each have a polygonal cross-section in their own axial direction.

9. The locking system (1) according to any one of claims 1 to 4, characterized in that: The first locking pin (21), the second locking pin (22) and the third locking pin (23) are all tapered pins and have the same structure.

10. A wind turbine generator set, characterized in that: include: first component; a second component, rotatably connected to the first component; The locking system (1) according to any one of claims 1 to 9, wherein the base (10) is arranged on the first component, the pin assembly is arranged on the second component and faces the base (10), and in the circumferential direction (X) of the base (10), the first locking pin (21), the second locking pin (22) and the third locking pin (23) are spaced apart, the first locking pin (21) and the second locking pin (22) are arranged adjacent to each other and form the first angle (aa) with the second locking pin (22), the second angle (bb) is formed between the first locking pin (21) and the adjacent third locking pin (23), the third angle (cc) is formed between the second locking pin (22) and the adjacent third locking pin (23), the second angle (bb) is equal to the third angle (cc) and the absolute value of the difference between the second angle (bb) and the first angle (aa) is greater than zero.

11. The wind turbine generator set according to claim 10, characterized in that: One of the first component and the second component is an impeller (5) and the other is a nacelle (3); Alternatively, one of the first component and the second component is a rotor of a generator (4) and the other is a stator of the generator (4); Alternatively, one of the first component and the second component is a moving shaft of a shaft system structure, and the other is a fixed shaft of the shaft system structure.

12. The wind turbine generator set according to claim 10, characterized in that: The base (10) and the first component are an integrated structure.

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