Generator end cover structure

Abstract

The invention discloses a generator end cover structure which comprises the components of an annular sliding chamber which is provided with a mounting hole; the end cover is provided with a connecting hole, and the connecting hole is detachably connected with the mounting hole through a connecting piece; the bushing is matched with the connecting piece; the annular sliding chamber is provided with a first counter bore, and the end, close to the annular sliding chamber, of the lining is matched with the first counter bore. The end cover is provided with a second counter bore, and the end, close to the end cover, of the lining is matched with the second counter bore. A flange and reinforcing rib structure is omitted, an inner spigot and outer spigot matching structure is omitted, connection is carried out through matching of the lining and the connecting piece, and a large amount of welding workload and manufacturing cost are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of generators, and in particular to a generator end cover structure. Background Art

[0002] Doubly-fed wind turbines occupy an important position in the field of modern wind power generation due to their high efficiency and wide applicability. One of its core components is the slip ring chamber, which is used to transmit AC and DC between the rotor and stator of the wind turbine. The slip ring chamber is usually located on the outside of the end cover of the non-driving end of the generator, and is concentric with the rotating shaft to ensure the stability and reliability of the electrical connection. However, in the prior art, the connection method between the slip ring chamber and the end cover is often complicated, which not only increases the manufacturing cost but also affects the assembly efficiency. The existing connection method usually includes welding a flange on the outside of the end cover and welding it to the end cover through several reinforcing ribs to ensure structural strength and stability. An inner stopper structure concentric with the rotating shaft is machined on the flange, and a corresponding outer stopper structure is machined on the connection part between the slip ring chamber and the flange, and the concentricity is ensured by the stopper matching, and finally fastened by bolts. Although this connection method can meet the basic connection and concentricity requirements, it also brings many inconveniences and challenges. First, in order to ensure the welding strength between the flange and the end cover, a certain welding rib plate structure needs to be set, which increases the manufacturing difficulty and cost. Secondly, machining the inner stop structure on the flange and machining the outer stop structure on the slip ring chamber both increase the machining process, further increasing the manufacturing cost. In addition, due to the complexity of the welding structure, welding deformation and other problems may occur, affecting the accuracy and reliability of the final product. Therefore, in order to simplify the manufacturing process, reduce production costs, improve assembly efficiency, and reduce the negative impact of welding deformation, it is very necessary to provide a generator end cover structure. Summary of the invention

[0003] The present invention aims to solve at least one of the above technical problems.

[0004] To solve the above problems, the first purpose of the present invention is to provide a generator end cover structure, which includes: an annular sliding chamber, which is provided with a mounting hole; an end cover, which is provided with a connecting hole, and the connecting hole and the mounting hole are detachably connected through a connecting piece.

[0005] Compared with the structure in the prior art that requires welding flanges and reinforcing ribs, the present invention directly realizes the connection between the slip ring chamber and the end cover through the mounting holes and the connecting holes, without the need for additional welding flanges, thereby simplifying the manufacturing process. Compared with the structure in the prior art that requires welding flanges and reinforcing ribs, the present invention directly realizes the connection between the slip ring chamber and the end cover through the mounting holes and the connecting holes, without the need for additional welding flanges, thereby simplifying the manufacturing process. Since no additional flanges and ribs are required, the use of materials is reduced and the manufacturing cost is reduced. There is no need to process the inner stop and outer stop structures, which reduces the machining steps and reduces the manufacturing cost. Through the cooperation of the mounting holes and the connecting holes, the assembly process is simpler and faster, the assembly time is reduced, and the production efficiency is improved. The detachable connector makes the connection between the slip ring chamber and the end cover more flexible and convenient for maintenance and overhaul. The welding parts are reduced, the risk of welding defects is reduced, and the reliability of the overall structure is improved. Through the precisely designed mounting holes and connecting holes, the concentricity of the slip ring chamber and the rotating shaft can be better maintained, and the stability and reliability of the connection are improved.

[0006] In the above technical solution, the generator end cover structure also includes a bushing, which cooperates with the connecting piece.

[0007] The cooperation between the bushing and the connector can provide a tighter connection, increase the contact area between the connector and the slip ring chamber and the end cover, thereby improving the stability and tightness of the connection. The presence of the bushing can prevent the connector from loosening under conditions such as high temperature and vibration, ensuring the long-term stability of the connection. The bushing can disperse the pressure applied by the connector to a larger contact surface, reduce local stress concentration, and thus enhance the strength of the overall structure. The cooperation between the bushing and the connector can ensure that the concentricity between the slip ring chamber and the end cover is more precise and improve the assembly accuracy. The cooperation between the bushing and the connector makes the connection between the slip ring chamber and the end cover more flexible, which is convenient for disassembly and maintenance.

[0008] In any of the above technical solutions, the annular sliding chamber is provided with a first countersunk hole, and one end of the bushing close to the annular sliding chamber cooperates with the first countersunk hole.

[0009] The cooperation of the first countersunk hole and the bushing can provide a tighter connection and increase the stability of the connection. The bushing can evenly disperse the pressure of the connecting piece into the countersunk hole of the annular sliding chamber to prevent loosening between the slip ring chamber and the end cover. The cooperation of the bushing can effectively reduce the vibration and noise at the connection and improve the stability and reliability of the entire structure. The cooperation of the first countersunk hole and the bushing can ensure that the concentricity between the slip ring chamber and the end cover is more precise and improve the assembly accuracy. The presence of the bushing can evenly disperse the pressure applied by the connecting piece into the countersunk hole of the annular sliding chamber, reduce local stress concentration, and enhance the strength of the overall structure. Through the guiding role of the first countersunk hole and the bushing, the assembly steps can be simplified and the assembly efficiency can be improved.

[0010] In any of the above technical solutions, the end cover is provided with a second countersunk hole, and one end of the bushing close to the end cover matches with the second countersunk hole.

[0011] The cooperation of the second countersunk hole and the bushing can provide a tighter connection and increase the stability of the connection. The bushing can evenly distribute the pressure of the connecting piece to the countersunk hole of the end cover to prevent the end cover and the annular sliding chamber from loosening. Through the guiding effect of the second countersunk hole and the bushing, the assembly steps can be simplified and the assembly efficiency can be improved. The cooperation of the bushing can effectively reduce the vibration and noise at the connection and improve the stability and reliability of the entire structure. The cooperation of the second countersunk hole and the bushing can ensure that the concentricity between the end cover and the annular sliding chamber is more precise and improve the assembly accuracy.

[0012] In any of the above technical solutions, the connecting hole is provided with an internal thread, and the internal thread matches with the connecting piece.

[0013] The fit of the internal thread and the connector can provide a very tight and strong connection, ensuring the stability of the structure. The meshing of the threads can increase friction and prevent the connector from loosening. The fit of the internal thread and the connector can effectively reduce vibration and noise at the connection, improving the stability and reliability of the overall structure. The fit of the internal thread can ensure that the concentricity between the connector and the connecting hole is more accurate, improving the assembly accuracy. The threaded connection can evenly distribute the pressure applied by the connector to all parts of the structure, reduce local stress concentration, and enhance the strength of the overall structure. The threaded connection has a certain elasticity, which can absorb the impact generated during installation and use, further enhancing the durability of the structure. Threaded connections are usually easy to disassemble and reinstall, which facilitates disassembly and maintenance work.

[0014] In any of the above technical solutions, the connecting piece is a bolt, the bolt passes through the mounting hole, and the tail of the bolt matches the connecting hole.

[0015] After the bolt passes through the mounting hole, the tail of the bolt cooperates with the connection hole to provide a very tight and strong connection, ensuring the stability of the structure. The meshing of the threads can increase friction and prevent the connection from loosening. The cooperation between the bolt and the connection hole can effectively reduce the vibration and noise at the connection, and improve the stability and reliability of the overall structure. The cooperation between the bolt and the mounting hole can ensure more precise concentricity between the connection and the structure, and improve the assembly accuracy. Bolted connections are usually easy to disassemble and reinstall, which is convenient for disassembly and maintenance work.

[0016] In any of the above technical solutions, the connecting piece includes a stud, the stud passes through the mounting hole, and one end of the stud matches the connecting hole.

[0017] The close fit between the stud and the connection hole ensures the stability and reliability of the connection and reduces loosening caused by vibration or impact. The design of the stud makes the installation and removal process more convenient and quick. The connection can be fixed or released by a simple rotation operation. As a part of the connection, the stud can withstand large tensile and shear forces, thereby enhancing the strength and bearing capacity of the overall structure.

[0018] In any of the above technical solutions, the connecting piece also includes a nut, and one end of the stud near the mounting hole cooperates with the nut.

[0019] The nut can be tightened on the stud. By tightening the nut, the friction between the stud and the mounting hole can be increased, further enhancing the stability of the connection. Tightening the nut can ensure that the stud will not loosen due to vibration or other external forces, thereby improving the reliability of the connection. The nut can be tightened quickly, simplifying the assembly steps and improving assembly efficiency. The tightening effect of the nut can ensure a close fit between the stud and the mounting hole, improving the stability of the overall structure. The nut can be easily loosened and tightened, facilitating disassembly and maintenance work, reducing maintenance costs and time. By adjusting the tightness of the nut, the position and tightness of the connector can be easily adjusted, facilitating subsequent adjustments and maintenance.

[0020] In any of the above technical solutions, the generator end cover structure also includes a washer, which abuts against the head of the bolt or the nut.

[0021] Washers can provide a seal to prevent oil, coolant or other fluids from leaking from the connection. Especially between the generator end cover and the main body, washers can form a good seal to ensure that the internal fluid does not leak out. Washers can disperse the load at the contact point between the bolt head or nut and the end cover to avoid damage or deformation caused by local stress concentration. Washers can reduce the stress and wear caused by direct contact and protect the bolt head and end cover materials from damage. Washers can increase the friction between the bolt head or nut and the end cover, making the fastening more reliable. This helps to ensure a tight fit between the connectors and prevent loosening. The presence of washers can ensure precise alignment between the bolt head or nut and the end cover, improve assembly accuracy, and ensure the reliability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be discussed below. Obviously, the technical solutions described in conjunction with the drawings are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments and their drawings can be obtained based on the embodiments shown in these drawings without paying creative work.

[0023] Figure 1It is a schematic diagram of a generator end cover structure provided by an embodiment of the present invention.

[0024] Figure 2 It is a schematic diagram of a generator end cover structure provided by an embodiment of the present invention.

[0025] Figure 3 yes Figure 2 Enlarged view of part A.

[0026] In the figure: 100 - annular sliding chamber, 110 - mounting hole, 120 - first countersunk hole, 200 - end cover, 210 - connecting hole, 220 - second countersunk hole, 300 - connecting piece, 310 - gasket, 400 - bushing. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purpose, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0028] like Figure 1 , Figure 2 , Figure 3 As shown, an embodiment of the present invention provides a generator end cover structure, which includes: an annular sliding chamber 100, the annular sliding chamber 100 is provided with a mounting hole 110; an end cover 200, the end cover 200 is provided with a connecting hole 210, and the connecting hole 210 is detachably connected to the mounting hole 110 through a connecting piece 300; a bushing 400, the bushing 400 cooperates with the connecting piece 300; the annular sliding chamber 100 is provided with a first countersunk hole 120, and one end of the bushing 400 close to the annular sliding chamber 100 cooperates with the first countersunk hole 120; the end cover 200 is provided with a second countersunk hole 220, and the bushing 400 is provided with a second countersunk hole 220. One end of the sleeve 400 close to the end cover 200 cooperates with the second countersunk hole 220; the connecting hole 210 is provided with an internal thread, and the internal thread cooperates with the connecting piece 300; the connecting piece 300 adopts a bolt, the bolt passes through the mounting hole 110, and the tail of the bolt cooperates with the connecting hole 210, or the connecting piece 300 includes a stud and a nut, the stud passes through the mounting hole 110, one end of the stud cooperates with the connecting hole 210, and the end of the stud close to the mounting hole 110 cooperates with the nut; a washer 310, the washer 310 abuts against the head of the bolt or the nut.

[0029] In this embodiment, a mounting plate is provided at one end of the annular sliding chamber 100 close to the end cover 200, and a mounting hole 110 is provided on the mounting plate. A total of six mounting holes 110 are provided on the mounting plate, and the six mounting holes 110 are evenly distributed with the central axis of the annular sliding chamber 100 as the center of the circle. Similarly, a total of six connecting holes 210 are provided on the end cover 200, which correspond to the six mounting holes 110 on the mounting plate one by one, so as to ensure that the annular sliding chamber 100 and the end cover 200 are concentric. The connecting member 300 adopts a bolt, and the bolt passes through the mounting hole 110 from the inner side of the annular sliding chamber 100, and then is spirally connected with the connecting hole 210, wherein the mounting hole 110 is a through hole with a smooth inner side, and the connecting hole 210 is a through hole with a thread on the inner side, and the thread on the inner side of the connecting hole 210 matches the bolt. The connecting member 300 can also adopt a structure in which a stud and a nut cooperate, and the nut is installed on the inner side of the annular sliding chamber 100. If bolts are used, washers 310 are placed between the bolt heads and the mounting plate. If studs and nuts are used, washers 310 are placed between the nuts and the mounting plate. Bushing 400 is sleeved on the outside of the connector 300. The side of the annular sliding chamber 100 close to the end cover 200 is provided with a first countersunk hole 120. The side of the end cover 200 close to the end cover 200 is provided with a second countersunk hole 220. The left and right ends of bushing 400 are matched with the second countersunk hole 220 and the first countersunk hole 120 respectively. The size of the second countersunk hole 220 and the first countersunk hole 120 is similar to that of bushing 400, so as to ensure that bushing 400 will not deviate, and further ensure that the connector 300 will not deviate.

[0030] In the present invention, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "connect" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "upper" and "lower" etc. are based on the directions or positional relationships shown in the accompanying 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 unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0032] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0033] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A generator end cover structure, characterized in that: include: An annular sliding chamber (100), wherein the annular sliding chamber (100) is provided with a mounting hole (110); An end cover (200), wherein the end cover (200) is provided with a connection hole (210), and the connection hole (210) is detachably connected to the mounting hole (110) via a connecting piece (300).

2. The generator end cover structure according to claim 1, characterized in that: It also includes a bushing (400), wherein the bushing (400) cooperates with the connecting piece (300).

3. The generator end cover structure according to claim 2, characterized in that: The annular sliding chamber (100) is provided with a first countersunk hole (120), and one end of the bushing (400) close to the annular sliding chamber (100) is matched with the first countersunk hole (120).

4. The generator end cover structure according to claim 2, characterized in that: The end cover (200) is provided with a second countersunk hole (220), and one end of the bushing (400) close to the end cover (200) is matched with the second countersunk hole (220).

5. The generator end cover structure according to claim 1, characterized in that: The connection hole (210) is provided with an internal thread, and the internal thread matches the connection piece (300).

6. The generator end cover structure according to claim 1, characterized in that: The connecting member (300) is a bolt, the bolt passes through the mounting hole (110), and the tail of the bolt matches the connecting hole (210).

7. The generator end cover structure according to claim 1, characterized in that: The connecting member (300) comprises a stud, the stud passes through the mounting hole (110), and one end of the stud matches the connecting hole (210).

8. The generator end cover structure according to claim 7, characterized in that: The connecting piece (300) further comprises a nut, and an end of the stud close to the mounting hole (110) cooperates with the nut.

9. The generator end cover structure according to any one of claims 6 or 7, characterized in that: It also includes a washer (310), which abuts against the head of the bolt or the nut.

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