Guide connecting structure

Abstract

The utility model discloses a guide connecting structure which is used for assisting in high-precision butt-joint assembly of an impeller and a base of a wind driven generator, the diameter of a threaded hole of the impeller is larger than that of a threaded hole of the base, and the guide connecting structure comprises at least two guide pieces arranged in the circumferential direction of the impeller at intervals. One end, in the length direction, of the guide piece is used for being detachably connected into the threaded hole of the base, the other end of the guide piece is sleeved with a flexible piece, and the flexible piece is used for being inserted into and penetrating through the threaded hole of the impeller. According to the utility model, the impeller and the base are quickly and accurately guided and aligned, the mounting efficiency is improved, the alignment precision of the threaded hole of the impeller and the threaded hole of the base is ensured, and the damage to internal threads of the threaded holes of the impeller and the base in the process of fixing the impeller and the base by using a bolt is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation, in particular to a guide connection structure. Background Art

[0002] With the continuous development and utilization of wind energy, the installed capacity of wind turbines has increased year by year. By 2023, the global cumulative installed capacity of wind turbines has reached 1021GW. As the number of wind turbines increases, wind turbines with longer operating time need to replace impellers and bases.

[0003] The traditional method of installing the impeller and the base of a wind turbine is usually to hoist the impeller to the top of the base by a crane, and then gradually lower the impeller. During this process, the personnel at the base observe whether the threaded holes of the impeller and the threaded holes of the base are aligned vertically, and the alignment status is fed back to the personnel operating the crane through a walkie-talkie, until the threaded holes of the impeller and the threaded holes of the base are docked and the impeller and the base are abutted against each other, and then the two are fixed with bolts; however, the above installation method requires high cooperation of multiple personnel, is time-consuming, and relies on manual positioning of the threaded hole position, which has low accuracy. When the bolts are screwed for fixing, the internal threads of the impeller or the base are easily damaged due to insufficient alignment accuracy of the threaded holes of the impeller and the threaded holes of the base. Therefore, there is an urgent need for a guide device that can assist in the high-precision assembly of the impeller and the base of a wind turbine. Utility Model Content

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the lack of a guide device in the prior art that can assist in high-precision assembly of a wind turbine impeller and a base, thereby providing a guide connection structure.

[0005] According to a guiding connection structure provided by the utility model, it is used to assist in the high-precision docking and assembly of the wind turbine impeller and the base. The diameter of the threaded hole of the impeller is larger than the diameter of the threaded hole of the base. The guiding connection structure includes at least two guide members arranged at intervals along the circumference of the impeller. One end of the guide member along its length direction is used for detachable connection in the threaded hole of the base, and the other end is provided with a flexible member on the outer sleeve. The flexible member is used to be inserted through the threaded hole of the impeller.

[0006] According to a guide connection structure of the utility model, at least the following technical effects are achieved:

[0007] One end of the guide piece is detachably connected to the threaded hole of the base, and the other end of the guide piece is covered with a soft piece. During the process of assembling and fixing the impeller and the base, one end of the guide piece is first connected to the corresponding threaded hole of the base, and then the impeller is lifted up with the guide piece and the soft piece as positioning references, and the corresponding threaded hole of the impeller is passed through the soft piece until the end face of the impeller and the end face of the base fit each other, so that the impeller and the base are quickly and accurately guided and aligned, while improving the installation efficiency, the accuracy of the alignment of the threaded hole of the impeller with the threaded hole of the base is ensured, and the damage to the internal threads of the threaded holes of the impeller and the base is effectively avoided in the process of fixing the impeller and the base with bolts; at the same time, the soft and tough characteristics of the soft piece are used to avoid hard contact with the internal threads of the threaded hole of the impeller during the process of lowering the impeller to fit with the base, ensuring that the internal threads of the threaded hole of the impeller are not damaged. At the same time, by arranging at least two guide parts along the circumference of the impeller, at least two positions of the impeller and the base along the circumference can be guided to ensure the relative position relationship between the impeller and the base, thereby ensuring the coaxiality accuracy of each threaded hole of the impeller and the corresponding threaded hole of the base, and then ensuring the accuracy of alignment between the threaded holes of the impeller and the threaded holes of the base, effectively avoiding damage to the internal threads of the threaded holes of the impeller and the threaded holes of the base in the process of fixing the impeller and the base with bolts, thereby ensuring the connection strength between the two.

[0008] Preferably, a first external thread is provided on an outer side wall of one end of the guide member along the length direction thereof away from the flexible member, and the first external thread is used to match with the threaded hole of the base.

[0009] Preferably, one end of the flexible member away from the guiding member along the length direction of the guiding member is used to extend outside the threaded hole of the impeller, and is provided with a force ring.

[0010] Preferably, the flexible member is configured as a high-density polyethylene portion.

[0011] Preferably, three guide members are provided.

[0012] Preferably, the flexible member and the guiding member are integrally formed.

[0013] Preferably, a connecting hole is provided in one end of the flexible member facing the guiding member, and one end of the guiding member facing the flexible member is connected in the connecting hole by interference fit.

[0014] Preferably, one end of the guide member facing away from the base extends to the outside of the threaded hole of the impeller and is provided with a second external thread, and one end of the flexible member facing the guide member is provided with an internal threaded hole, and the internal threaded hole matches the second external thread.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a structural schematic diagram of a guide connection structure of this embodiment assembled on a base.

[0018] Description of reference numerals:

[0019] 1- Base;

[0020] 2-guide piece, 21-first external thread;

[0021] 3- soft part, 31- force ring. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] Embodiment 1

[0027] like Figure 1 The present embodiment shows a guide connection structure, which is used to assist in high-precision docking and assembly of the wind turbine impeller and the base 1. The diameter of the threaded hole of the impeller is larger than that of the threaded hole of the base 1. The guide connection structure includes at least two guide members 2 arranged at intervals along the circumference of the impeller. One end of the guide member 2 along the length direction of the guide member 2 is used for detachable connection in the threaded hole of the base 1, and the other end is provided with a flexible member 3. The flexible member 3 is used to insert through the threaded hole of the impeller. It can be understood that the length direction of the guide member 2 mentioned in the text refers to Figure 1 The first direction in .

[0028] The guide connection structure of this embodiment is that one end of the guide member 2 is detachably connected to the threaded hole of the base 1, and the other end of the guide member 2 is covered with a soft member 3. In the process of assembling and fixing the impeller and the base 1, the base 1 is first placed horizontally on the lifting platform and one end of the guide member 2 is connected to the corresponding threaded hole of the base 1. Then the impeller is lifted and the guide member 2 and the soft member 3 are used as positioning references, and the corresponding threaded hole of the impeller is passed through the soft member 3 until the end face of the impeller and the end face of the base 1 are fitted with each other, so that the impeller and the base 1 are quickly and accurately guided and aligned, while improving the installation efficiency, ensuring the accuracy of the alignment of the threaded hole of the impeller with the threaded hole of the base 1, and effectively avoiding damage to the internal threads of the impeller and the threaded holes of the base 1 in the process of fixing the impeller and the base 1 with bolts; at the same time, the soft and tough characteristics of the soft member 3 are used to avoid hard contact with the internal threads of the threaded hole of the impeller in the process of lowering the impeller to fit with the base 1, ensuring that the internal threads of the threaded hole of the impeller are not damaged. At the same time, by arranging at least two guide members 2 along the circumference of the impeller, at least two positions of the impeller and the base 1 along the circumference can be guided to ensure the relative position relationship between the impeller and the base 1, thereby ensuring the coaxiality accuracy of each threaded hole of the impeller and the corresponding threaded hole of the base 1, and then ensuring the accuracy of alignment of the threaded holes of the impeller and the threaded holes of the base 1, effectively avoiding damage to the internal threads of the threaded holes of the impeller and the threaded holes of the base 1 in the process of fixing the impeller and the base 1 with bolts, thereby ensuring the connection strength between the two.

[0029] Also, because one end of the guide member 2 is detachably connected to the threaded hole of the base 1, after the end face of the impeller and the end face of the base 1 are fitted together and the impeller and the other threaded holes of the base 1 are connected to each other by bolts, the guide member 2 and the soft member 3 can be removed from the corresponding threaded holes of the impeller and the base 1, and then the threaded holes of the impeller and the base 1 originally equipped with the guide member 2 can be connected to each other by bolts, thereby further improving the connection strength between the impeller and the base 1.

[0030] like Figure 1As shown, optionally, the outer side wall of the guide member 2 at one end away from the flexible member 3 along the length direction of the guide member 2 is provided with a first external thread 21, and the first external thread 21 is used to match the threaded hole of the base 1. The guide member 2 and the base 1 are detachably connected to each other by threading the first external thread 21 with the threaded hole of the base 1. On the one hand, the connection stability between the guide member 2 and the base 1 is ensured, and the guide member 2 with the flexible member 3 at one end is convenient for accurately providing a positioning reference for the assembly process of the impeller hoisting to the base 1, so that only the corresponding threaded hole of the base 1 and the flexible member 3 are correspondingly plugged and matched, so as to ensure the accuracy of the alignment of the threaded hole of the impeller with the threaded hole of the base 1, thereby effectively reducing the installation time of the impeller and the base 1 and effectively avoiding the damage to the internal thread caused by fixing the impeller and the base 1 with bolts. On the other hand, it is convenient to remove the guide member 2 and the flexible member 3 from the corresponding threaded holes of the impeller and the base 1 after the other threaded holes of the impeller and the base 1 are connected to each other by bolts. Of course, this is only a preferred method for detachably connecting the guide member 2 and the threaded hole of the base 1, and its specific structure is not limited. As another replaceable implementation of the above technical solution, the outer wall of the end face of the threaded hole of the guide member 2 facing the base 1 is provided with a soft layer, and the soft layer can be detachably inserted in the threaded hole of the base 1, and the soft property of the soft layer is utilized to avoid damage to the internal thread of the threaded hole of the base 1.

[0031] Optionally, one end of the flexible member 3 away from the guide member 2 along the length direction of the guide member 2 is used to extend outside the threaded hole of the impeller, and is provided with a force ring 31. The force ring 31 provides an operator with a force application position so that the operator can disassemble and assemble the guide member 2 with the flexible member 3 and the threaded hole of the base 1.

[0032] Optionally, three guide members 2 are provided, and the three guide members 2 are arranged at equal intervals along the circumference of the impeller in three corresponding threaded holes of the base 1, so as to guide the impeller and the base 1 at three positions along the circumference, thereby ensuring the relative position relationship between the impeller and the base 1, thereby ensuring the coaxiality accuracy of each threaded hole of the impeller and the corresponding threaded hole of the base 1, and further ensuring the alignment accuracy of the threaded holes of the impeller and the threaded holes of the base 1.

[0033] Optionally, the soft part 3 is configured as a high-density polyethylene part. The high-density polyethylene material has good softness and good toughness, and can more effectively avoid hard contact with the internal thread of the threaded hole of the impeller when the impeller is lowered to fit with the base 1.

[0034] Optionally, the flexible member 3 is integrally formed with the guiding member 2, thereby reducing the number of assembly steps between the flexible member 3 and the guiding member 2, thereby reducing assembly errors and improving the assembly accuracy of the guide connection structure of this embodiment.

[0035] Embodiment 2

[0036] A guide connection structure is provided in this embodiment. Compared with the first embodiment, the difference between this embodiment and the first embodiment lies in the specific assembly structure of the flexible member 3 and the guide member 2. In this embodiment, a connection hole is provided in one end of the flexible member 3 facing the guide member 2, and one end of the guide member 2 facing the flexible member 3 is connected in the connection hole by interference fit. The guide member 2 and the flexible member 3 are connected as a whole by interference fit, and the friction between the guide member 2 and the flexible member 3 can ensure that the guide member 2 and the flexible member 3 do not separate from each other during the process of removing the guide member 2 from the corresponding threaded hole of the base 1, and a large external force can be used to remove the damaged flexible member 3 from the guide member 2 and replace it with a new flexible member 3.

[0037] Embodiment 3

[0038] A guide connection structure is provided in this embodiment. Compared with the first embodiment, the difference between this embodiment and the first embodiment lies in the specific assembly structure of the flexible member 3 and the guide member 2. In this embodiment, the end of the guide member 2 away from the base 1 extends to the outside of the threaded hole of the impeller and is provided with a second external thread. The end of the flexible member 3 facing the guide member 2 is provided with an internal threaded hole, and the internal threaded hole matches the second external thread. The flexible member 3 and the guide member 2 are detachably connected to form an integral body by threading the second external thread and the internal threaded hole, so that when one of the two is damaged and cannot be used, it can be replaced accordingly, thereby reducing the cost of maintenance.

[0039] It should be noted that when the guide member 2 needs to be removed from the corresponding threaded hole of the base 1, the flexible member 3 can be removed first, and then force is applied to the portion of the guide member 2 extending outside the threaded hole of the impeller to remove the guide member 2.

[0040] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A guide connection structure, used to assist in high-precision docking and assembly of a wind turbine impeller and a base (1), wherein the diameter of the threaded hole of the impeller is larger than the diameter of the threaded hole of the base (1), and characterized in that: The guide connection structure comprises at least two guide members (2) arranged at intervals along the circumference of the impeller, one end of the guide member (2) along its length direction is used for detachably connecting to the threaded hole of the base (1), and the other end is provided with a flexible member (3) on the outer sleeve, and the flexible member (3) is used for inserting and passing through the threaded hole of the impeller.

2. A guide connection structure according to claim 1, characterized in that: A first external thread (21) is provided on the outer side wall of one end of the guide member (2) away from the flexible member (3) along its length direction, and the first external thread (21) is used to match the threaded hole of the base (1).

3. A guide connection structure according to claim 1, characterized in that: One end of the flexible member (3) that is away from the guiding member (2) along the length direction of the guiding member (2) is used to extend outside the threaded hole of the impeller and is provided with a force ring (31).

4. A guide connection structure according to any one of claims 1 to 3, characterized in that: The flexible component (3) is configured as a high-density polyethylene part.

5. A guide connection structure according to claim 1, characterized in that: The number of guide members (2) is three.

6. A guide connection structure according to claim 1, characterized in that: The flexible component (3) and the guiding component (2) are integrally formed.

7. A guide connection structure according to claim 1, characterized in that: A connection hole is provided in one end of the flexible member (3) facing the guiding member (2), and one end of the guiding member (2) facing the flexible member (3) is connected in the connection hole by interference fit.

8. The guide connection structure according to claim 1, characterized in that: The end of the guide member (2) facing away from the base (1) extends to the outside of the threaded hole of the impeller and is provided with a second external thread. The end of the flexible member (3) facing the guide member (2) is provided with an internal threaded hole, and the internal threaded hole matches the second external thread.

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