Protective cover cleaning mechanism of generator and generator

Abstract

A protective cover cleaning mechanism of a generator and the generator, comprising: a protective cover arranged at the end of the generator and provided with an air inlet hole; the brush assembly is arranged on the side, away from the generator, of the protective cover and can clean the air inlet hole; and the flexible connecting assembly is arranged between the generator and the protective cover and is in transmission connection with a rotor shaft of the generator and the brush assembly so as to perform eccentric compensation on the brush assembly and the rotor shaft. Thus, eccentric compensation can be carried out on the brush assembly and the rotor shaft, a certain radial deviation can be allowed to exist between the rotation axis of the brush assembly and the rotation axis of the rotor shaft during installation and work, breakage of the rotor shaft is avoided, meanwhile, hard abrasion between the rotor shaft and the brush assembly can be reduced, and shutdown faults are avoided.

Description

Technical Field

[0001] This application relates to the field of generator technology, specifically to a generator cover cleaning mechanism and a generator. Background Technology

[0002] A generator is a device that converts mechanical energy into electrical energy. Because the rotor rotates at high speed during operation, the generator itself generates a large amount of heat. To improve heat dissipation efficiency, the protective cover at the rear of the generator is designed with ventilation holes. However, when generators are used in agricultural machinery such as harvesters, the harvester's working environment is harsh, containing straw debris. This straw debris can easily enter the ventilation holes, blocking the generator's cooling ducts, resulting in poor heat dissipation, and even causing the generator to burn out. In severe cases, it can even lead to a fire.

[0003] In existing technologies, a brush structure is used to clean the heat dissipation holes of the protective cover, thereby improving the service life of the generator under such operating conditions. However, the brush structure is bolted to the generator's rotor shaft to rotate synchronously with it, requiring high assembly and machining precision. Any eccentricity between the brush structure and the rotor shaft can affect the normal operation of the generator and may even lead to rotor shaft breakage. Furthermore, after prolonged operation, the output end of the rotor shaft will become rounded, eventually causing transmission failure between the rotor shaft and the brush structure. Utility Model Content

[0004] In view of this, this application provides a generator cover cleaning mechanism that can compensate for the eccentricity of the brush assembly and the generator rotor shaft, thereby avoiding any impact on the normal operation of the generator. This application also provides a generator including the aforementioned cover cleaning mechanism.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A generator casing cleaning mechanism includes:

[0007] A protective cover is installed at the end of the generator and has an air inlet.

[0008] A brush assembly is disposed on the side of the protective cover away from the generator and is capable of cleaning the air inlet.

[0009] A flexible connection assembly is disposed between the generator and the protective cover, and drivesly connects the rotor shaft of the generator and the brush assembly to compensate for the eccentricity of the brush assembly and the rotor shaft.

[0010] Optionally, the flexible connection assembly includes:

[0011] The first connecting member is fixedly connected to the rotor shaft;

[0012] The second connector is fixedly connected to the brush shaft of the brush assembly;

[0013] A flexible component is connected between the first connector and the second connector, and is capable of deformation under the action of the first connector and the second connector.

[0014] Optionally, the flexible component is configured as a spring structure, with a first end connected to the first connector and a second end connected to the second connector.

[0015] Optionally, the first connector is provided with a plurality of first claws, the second connector is provided with a plurality of second claws, the plurality of first claws and the plurality of second claws are interleaved, and the flexible member is at least partially disposed between the first claws and the second claws.

[0016] Optionally, the protective cover is provided with mounting holes, and the second connector is connected in the mounting holes via a support bearing.

[0017] Optionally, the mounting hole has a first hole and a second hole, the second connector is mounted on the first hole, the brush shaft of the brush assembly passes through the second hole, and the inner diameter of the first hole is larger than the inner diameter of the second hole, so as to form a stepped surface for limiting the support bearing.

[0018] Optionally, a shim is provided between the support bearing and the stepped surface, and the inner diameter of the shim is smaller than the inner diameter of the support bearing.

[0019] Optionally, a protective plate is provided between the protective cover and the brush assembly, the protective plate being connected to the brush shaft of the brush assembly, and the outer diameter of the protective plate being larger than the inner diameter of the second hole of the mounting hole.

[0020] Optionally, the distance between the guard plate and the protective cover is set to 0.8-1.2 mm.

[0021] A generator comprising a protective cover cleaning mechanism for the generator as described in any of the preceding claims.

[0022] The generator cover cleaning mechanism provided in this application has a flexible connecting component on the inner side of the cover. This flexible connecting component is positioned between the cover and the end of the generator, and is drively connected between the generator's rotor shaft and the brush assembly. For example, the input end of the flexible connecting component is connected to the rotor shaft, and the output end is connected to the brush holder of the brush assembly, allowing the rotor shaft to drive the brush assembly to rotate. Due to the flexibility of the flexible connecting component, it can compensate for the eccentricity between the brush assembly and the rotor shaft. During operation, it allows for a certain radial deviation between the rotation axis of the brush assembly and the rotation axis of the rotor shaft, preventing rotor shaft breakage. It also reduces hard wear between the rotor shaft and the brush assembly, preventing downtime. Furthermore, the vibration caused by the contact between the brush assembly and the cover can be offset by the flexible connecting component, preventing rotor shaft vibration, further improving the generator's operational stability and extending its service life. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 A schematic diagram of the generator cover cleaning mechanism and its cooperation with the generator according to the first embodiment of this application;

[0025] Figure 2 A structural diagram of the flexible connection assembly provided in the first embodiment;

[0026] Figure 3 A structural diagram of the flexible connection component provided in the second embodiment.

[0027] exist Figures 1-3 middle:

[0028] 1-Generator, 2-Protective cover, 3-Brush assembly, 4-Support bearing, 5-Guard plate, 6-Brush shaft, 7-Flexible connection assembly, 8-Rotor shaft, 71-First connector, 72-Second connector, 73-Flexible component. Detailed Implementation

[0029] This application provides a generator cover cleaning mechanism. This application also provides a generator including the aforementioned generator cover cleaning mechanism.

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] like Figures 1-3 As shown in the figure, this application embodiment provides a generator cover cleaning mechanism. The generator 1 is a device that converts mechanical energy into electrical energy. The heat dissipation direction of the generator 1 is from the tail end to the fan end. Therefore, the end of the generator 1 is generally provided with a protective cover 2 with an air intake hole. The protective cover 2 is provided at the end of the generator 1. The generator housing includes a front cover and a rear cover. The protective cover 2 is provided at the end of the rear cover away from the front cover, and the protective cover 2 has an air intake hole. Outside air enters the interior of the generator 1 through the air intake hole to achieve heat dissipation of the generator 1.

[0032] A brush assembly 3 is installed on the outer side of the protective cover 2, that is, the brush assembly 3 is located on the side of the protective cover 2 away from the generator 1. The brush assembly 3 can clean the air inlet on the protective cover 2. Specifically, the brush assembly 3 includes a brush frame and brush bristles. The brush bristles are located on the side of the brush frame facing the protective cover 2. The brush bristles clean the air inlet on the protective cover 2. During the cleaning process, the brush assembly 3 can prevent debris from entering the interior of the generator 1, such as blocking straw fragments when applied to a harvester. On the other hand, it can also prevent straw fragments and other debris from being adsorbed and accumulated on the protective cover 2 due to negative pressure. This effectively avoids the problem of poor heat dissipation caused by the blockage of the heat dissipation duct of the generator 1. When applied to a harvester, it can fundamentally solve the problem of generator burnout caused by the blockage of the heat dissipation duct in the harvester industry.

[0033] A flexible connecting component 7 is provided on the inner side of the protective cover 2. Specifically, the flexible connecting component 7 is positioned between the protective cover 2 and the end of the generator 1, and it is drively connected between the rotor shaft 8 of the generator 1 and the brush assembly 3. For example, the input end of the flexible connecting component 7 is connected to the rotor shaft 8, and the output end is connected to the brush holder of the brush assembly 3, so that the rotor shaft 8 drives the brush assembly 3 to rotate. Due to the flexibility of the flexible connecting component 7, eccentricity compensation can be provided between the brush assembly 3 and the rotor shaft 8. During installation and operation, a certain radial deviation between the rotation axis of the brush assembly 3 and the rotation axis of the rotor shaft 8 is allowed, preventing rotor shaft 8 from breaking. Simultaneously, it can reduce hard wear between the rotor shaft 8 and the brush assembly 3, preventing downtime. Furthermore, the vibration caused by the contact between the brush assembly 3 and the protective cover 2 can be offset by the flexible connecting component 7, preventing rotor shaft 8 vibration, further improving the working stability of the rotor shaft 8 and extending its service life.

[0034] In this design, the flexible connection assembly 7 includes a first connector 71, a second connector 72, and a flexible element 73. The first connector 71 is fixedly connected to the rotor shaft 8, and the second connector 72 is fixedly connected to the brush shaft 6 of the brush assembly 3. For example, the fixed connection can be achieved by a key or by screws. The flexible element 73 is connected between the first connector 71 and the second connector 72. Because the flexible element 73 is flexible and elastically deformable, when there is an eccentricity between the rotor shaft 8 and the brush shaft 6 of the brush assembly 3, the first connector 71 and the second connector 72, after installation, will cause the flexible element 73 to undergo elastic deformation, thereby compensating for the eccentricity between the rotor shaft 8 and the brush assembly 3 through the elastic deformation of the flexible element 73.

[0035] During operation, the rotor shaft 8 of the generator 1 rotates, causing the first connecting member 71 to rotate synchronously. The first connecting member 71 drives the flexible member 73 to rotate. The flexible member 73, which bears the rotational force, will undergo elastic deformation. When the elastic deformation reaches a certain level, the flexible member 73 will start to drive the second connecting member 72 to rotate. The second connecting member 72 drives the brush shaft 6 of the brush assembly 3 to rotate synchronously, thereby driving the brush assembly 3 to rotate, so as to achieve cleaning of the protective cover 2.

[0036] The specific structure of the flexible connection component 7 can take many different forms, such as in the first embodiment, like... Figure 2 As shown, the flexible component 73 is configured as a spring structure. The first end of the spring structure is connected to the first connecting component 71, and the second end of the spring structure is connected to the second connecting component 72. Specifically, the two ends of the spring structure are welded to the first connecting component 71 and the second connecting component 72, respectively. Because the spring structure has the characteristic of elastic deformation, the second connecting component 72 can rotate with the first connecting component 71 after the first connecting component 71 rotates by a certain angle, thereby providing eccentric compensation for the rotor shaft 8 and the brush assembly 3. The structure is simple, stable, and reliable.

[0037] The spring structure can have a single helical spring with a relatively large diameter, where both ends of the spring are connected to the first connecting member 71 and the second connecting member 72, which simplifies the structure and saves costs. Alternatively, the spring structure can have multiple helical springs with relatively small diameters arranged side by side, with both ends of each spring connected to the first connecting member 71 and the second connecting member 72.

[0038] In the second embodiment, such as Figure 3As shown, the first connecting member 71 has multiple first jaws on the side near the second connecting member 72, and the multiple first jaws are arranged around the central axis of the first connecting member 71; the second connecting member 72 has multiple second jaws on the side near the first connecting member 71, and the multiple second jaws are arranged around the central axis of the second connecting member 72. Specifically, there are three first jaws and three second jaws. The multiple first jaws and multiple second jaws interlock, that is, there is one second jaw between two adjacent first jaws, and one first jaw between two adjacent second jaws, and the flexible member 73 is at least partially disposed between the first jaws and the second jaws. Here, the flexible connecting assembly 7 can be configured as a flexible coupling.

[0039] During operation, the rotor shaft 8 drives the first connecting member 71 to rotate synchronously. When the first connecting member 71 rotates, the first jaw drives the second jaw to move through the flexible member 73, so that the second connecting member 72 rotates with the first connecting member 71. Since there is a flexible member 73 between the first jaw and the second jaw, the first connecting member 71 and the second connecting member 72 can make flexible contact, thereby achieving eccentric compensation for the rotor shaft 8 and the brush assembly 3. It can also reduce or even avoid the transmission of vibration generated by the brush assembly 3 to the rotor shaft 8, which is beneficial for achieving high-speed and heavy-load transmission.

[0040] In some embodiments, the protective cover 2 has a mounting hole in the middle, and the second connector 72 is connected to the mounting hole through the support bearing 4. The brush shaft 6 of the brush assembly 3 is fixedly connected to the second connector 72 and extends through the mounting hole. Under the action of the support bearing 4, the second connector 72 and the brush assembly 3 can be stably supported, improving the rotational stability of the brush assembly 3.

[0041] The mounting hole has a first hole and a second hole arranged coaxially, with the first hole closer to the rotor of the generator 1 relative to the second hole. The second connector 72 is mounted in the first hole via a support bearing 4, and the brush shaft 6 of the brush assembly 3 passes through the second hole. Specifically, the inner ring of the support bearing 4 is fixedly connected to the second connector 72, and the outer ring of the support bearing 4 is fixedly connected to the inner wall of the first hole; this fixed connection can be an interference fit. Furthermore, the inner diameter of the first hole is larger than the inner diameter of the second hole, forming a stepped surface between the first and second holes. This stepped surface abuts against the support bearing 4, axially limiting the support bearing 4, and thus axially limiting the second connector 72, which helps improve structural stability.

[0042] It is understandable that the inner diameter of the second hole can be less than or equal to the inner diameter of the support bearing 4. In this way, the step between the first hole and the second hole can shield the support bearing 4, preventing external mud, water or impurities from damaging the support bearing 4.

[0043] In some preferred embodiments, a shim is provided between the support bearing 4 and the stepped surface. During installation, the outer ring of the support bearing 4 abuts against the stepped surface through the shim, which can prevent the support bearing 4 from directly contacting the protective cover 2 and causing damage. Moreover, the diameter of the shim is smaller than the inner diameter of the inner ring of the support bearing 4, so as to protect the support bearing 4 and better prevent external mud, water or impurities from entering the support bearing 4, thus preventing failure. For example, the inner diameter of the shim matches the outer diameter of the brush shaft 6 of the brush assembly 3.

[0044] A protective plate 5 is provided on the outer side of the protective cover 2, that is, the protective plate 5 is located between the protective cover 2 and the brush assembly 3. The protective plate 5 is connected to the brush shaft 6 of the brush assembly 3 so that the protective plate 5 rotates synchronously with the brush shaft 6. Moreover, the outer diameter of the protective plate 5 is larger than the inner diameter of the second hole of the mounting hole. In this way, the protective plate 5 seals the opening of the second hole, thereby preventing external mud, water and impurities from entering the mounting hole, which is beneficial to the protection of the internal structure of the generator.

[0045] The distance between the guard plate 5 and the protective cover 2 is set to 0.8-1.2 mm, preferably 1 mm. This avoids collisions between the guard plate 5 and the protective cover 2, reduces noise and vibration during equipment operation, and helps improve the stability of the structure.

[0046] This application also provides a generator, including a generator housing cleaning mechanism as described above. Since the generator includes the aforementioned generator housing cleaning mechanism, the beneficial effects of the generator housing cleaning mechanism are as described above and will not be repeated here.

[0047] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0048] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0049] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0050] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0051] It should be understood that the qualifiers “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.

[0052] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A generator cover cleaning mechanism, characterized in that, include: A protective cover is installed at the end of the generator and has an air inlet. A brush assembly is disposed on the side of the protective cover away from the generator and is capable of cleaning the air intake. A flexible connection assembly is disposed between the generator and the protective cover, and drivesly connects the rotor shaft of the generator and the brush assembly to compensate for the eccentricity of the brush assembly and the rotor shaft.

2. The generator cover cleaning mechanism according to claim 1, characterized in that, The flexible connection component includes: The first connecting member is fixedly connected to the rotor shaft; The second connector is fixedly connected to the brush shaft of the brush assembly; A flexible component is connected between the first connector and the second connector, and is capable of deformation under the action of the first connector and the second connector.

3. The generator cover cleaning mechanism according to claim 2, characterized in that, The flexible component is configured as a spring structure, with a first end connected to the first connector and a second end connected to the second connector.

4. The generator cover cleaning mechanism according to claim 2, characterized in that, The first connector is provided with a plurality of first claws, and the second connector is provided with a plurality of second claws. The plurality of first claws and the plurality of second claws are interleaved. The flexible member is at least partially disposed between the first claws and the second claws.

5. The generator cover cleaning mechanism according to claim 2, characterized in that, The protective cover is provided with mounting holes, and the second connecting member is connected to the mounting holes through a support bearing.

6. The generator cover cleaning mechanism according to claim 5, characterized in that, The mounting hole has a first hole and a second hole. The second connector is installed in the first hole. The brush shaft of the brush assembly passes through the second hole. The inner diameter of the first hole is larger than the inner diameter of the second hole to form a stepped surface for limiting the support bearing.

7. The generator cover cleaning mechanism according to claim 6, characterized in that, A shim is provided between the support bearing and the stepped surface, and the inner diameter of the shim is smaller than the inner diameter of the support bearing.

8. The generator cover cleaning mechanism according to claim 6, characterized in that, A protective plate is provided between the protective cover and the brush assembly. The protective plate is connected to the brush shaft of the brush assembly, and the outer diameter of the protective plate is larger than the inner diameter of the second hole of the mounting hole.

9. The generator cover cleaning mechanism according to claim 8, characterized in that, The distance between the guard plate and the protective cover is set to 0.8-1.2 mm.

10. A generator, characterized in that, The generator housing cleaning mechanism includes any one of claims 1-9 above.

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