Shield assembly of generator and generator

Abstract

A shield assembly of a generator and the generator, the shield assembly is arranged at the end of the generator, the shield assembly is provided with an air inlet hole, the shield assembly at least comprises an inner shield and an outer shield which are adjacent to each other, and one of the inner shield and the outer shield is connected with a rotor shaft of the generator and is driven by the rotor shaft to move. And the inner protective cover and the outer protective cover move relatively. Thus, when the air inlet hole of the shield assembly is blocked by impurities such as straw chippings and dust, that is, when the air inlet hole of the inner shield and / or the outer shield is blocked, the inner shield and the outer shield rotate relatively, and the inner shield and the outer shield are adjacently arranged to form a similar shearing structure; and a certain shearing and cleaning effect is achieved on impurities such as straw chippings and dust entering the air inlet holes of the inner protective cover and / or the outer protective cover, so that the problem that a heat dissipation air channel of the generator is blocked is solved, and then the heat dissipation efficiency of the generator is improved.

Description

Technical Field

[0001] This application relates to the field of generator technology, specifically to a generator housing assembly and a generator. Background Technology

[0002] A generator is a device that converts mechanical energy into electrical energy. Generally, the heat dissipation of a generator is from the tail end to the fan end; therefore, a protective cover with air intake vents is usually installed at the end of the generator. In current generators, the air intake vents of the protective cover serve as heat dissipation holes to allow air to enter and dissipate heat, while also preventing some debris from entering the generator's interior.

[0003] However, when the generator with the above structure is working in harsh environments, it is prone to poor heat dissipation. For example, when it is used in agricultural machinery such as harvesters, there are a lot of straw debris and dust in the working environment. Straw debris and dust can easily enter the generator's cooling air duct through the air inlet, causing blockage of the generator's cooling air inlet, resulting in poor heat dissipation of the generator, or even causing the generator to burn out. In severe cases, it can even cause a fire. Utility Model Content

[0004] In view of this, this application provides a generator shield assembly that can prevent the air intake holes on the shield from being blocked, thereby ensuring unobstructed heat dissipation channels and ensuring the heat dissipation effect of the generator. This application also provides a generator including the above-mentioned shield assembly.

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

[0006] A protective cover assembly for a generator is disposed at the end of the generator, and the protective cover assembly has an air inlet. The protective cover assembly includes at least an inner protective cover and an outer protective cover disposed adjacent to each other. One of the inner protective cover and the outer protective cover is connected to the rotor shaft of the generator and moves under the drive of the rotor shaft, so that the inner protective cover and the outer protective cover move relative to each other.

[0007] Optionally, the rotor shaft is connected to the inner protective cover, and the inner protective cover rotates under the drive of the rotor shaft.

[0008] Optionally, the rotor shaft is connected to the outer cover, the rotor shaft passes through the inner cover, and a bearing is provided between the rotor shaft and the inner cover, and the outer cover rotates under the drive of the rotor shaft.

[0009] Optionally, the distance between the inner shield and the outer shield along the axial direction of the rotor shaft is L1, and 2mm≤L1≤3mm.

[0010] Optionally, the inner cover has a protrusion on the side near the outer cover, and multiple protrusions are evenly distributed in the circumferential direction of the inner cover.

[0011] Optionally, in the axial direction of the rotor shaft, the protrusion height of the protrusion is 1mm to 3mm, and the distance between the protruding end of the protrusion and the outer cover is L2, where 2mm≤L2≤3mm.

[0012] Optionally, the diameter of the air inlet hole on the inner cover is larger than the diameter of the air inlet hole on the outer cover.

[0013] Optionally, it also includes a rotating shaft connected to the other of the inner and outer protective covers, and the rotating shaft is connected to a drive member, wherein:

[0014] The rotation direction of the rotating shaft is opposite to the rotation direction of the rotor shaft;

[0015] And / or, the rotation direction of the rotating shaft is the same as the rotation direction of the rotor shaft, and the rotation speed of the rotating shaft is different from the rotation speed of the rotor shaft.

[0016] Optionally, a first cam and a second cam are provided on the rotor shaft;

[0017] The inner cover has a first hole through which the rotor shaft passes and engages with the first cam. The wall of the first hole includes a first arc-shaped portion and a first linear portion distributed circumferentially.

[0018] The outer cover has a second hole through which the rotor shaft passes and engages with the second cam. The hole wall of the second hole includes a second arc-shaped portion and a second linear portion in a circumferential division.

[0019] Wherein, the first cam and the second cam are offset in the circumferential direction of the rotor shaft; and / or, the first linear portion and the second linear portion are offset in the circumferential direction of the rotor shaft.

[0020] A generator comprising a protective enclosure assembly for the generator as described in any of the preceding claims.

[0021] The generator enclosure assembly provided in this application includes at least an inner enclosure and an outer enclosure arranged adjacent to each other. One of the inner and outer enclosures is connected to the generator's rotor shaft and moves under the drive of the rotor shaft, allowing relative movement between the inner and outer enclosures. Thus, when the air inlets of the enclosure assembly are blocked by impurities such as straw debris and dust—that is, when the air inlets of the inner and / or outer enclosures are blocked—the relative movement of the adjacent inner and outer enclosures shears and shakes the impurities in the air inlets, thereby cleaning the straw debris and dust entering the air inlets of the inner and / or outer enclosures. This solves the problem of blocked cooling airflow in the generator, thereby improving the generator's cooling efficiency. Attached Figure Description

[0022] 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.

[0023] Figure 1 This is a schematic diagram of the structure of the generator casing assembly provided in an embodiment of this application;

[0024] Figure 2 A schematic diagram of the rotor shaft and inner protective cover;

[0025] Figure 3 A schematic diagram of the rotor shaft and outer protective cover;

[0026] Figure 4 A schematic diagram of the rotor shaft, the protective cover assembly, the first cam, and the second cam;

[0027] Figure 5 A schematic diagram of the rotor shaft, the first cam, and the inner protective cover;

[0028] Figure 6 This is a schematic diagram of the rotor shaft, the first cam, and the outer protective cover.

[0029] Figures 1-6 middle:

[0030] 1-Shield assembly, 2-Rotor shaft, 3-First cam, 4-Second cam, 5-Stator, 6-Rotor, 7-Front bearing, 8-Rear bearing;

[0031] 11-Inner protective cover, 12-Outer protective cover, 13-Air inlet;

[0032] 111 - First hole, 121 - Second hole;

[0033] 1111 - First arc-shaped part, 1112 - First linear part, 1211 - Second arc-shaped part, 1212 - Second linear part. Detailed Implementation

[0034] This application provides a protective enclosure assembly for a generator. This application also provides a generator including the aforementioned protective enclosure assembly.

[0035] 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.

[0036] like Figures 1-6As shown in the figure, this application embodiment provides a generator cover assembly 1. A generator is a device that converts mechanical energy into electrical energy. The heat dissipation direction of the generator (i.e., the flow direction of the cooling airflow) is from the tail end to the fan end. Therefore, the tail end of the generator is generally provided with a cover assembly 1 having an air inlet 13 to allow airflow into the generator and to block and filter impurities in the airflow. The cover assembly 1 is disposed at the end of the generator. The generator housing includes a front cover and a rear cover. The cover assembly 1 is disposed at the end of the rear cover away from the front cover, and the cover assembly 1 has an air inlet 13. Outside air enters the generator through the air inlet 13 to achieve heat dissipation for the generator. The cover assembly 1 includes at least an inner cover 11 and an outer cover 12 disposed adjacent to each other. The outer cover 12 refers to the cover disposed at the end of the generator and exposed on the generator surface, and the inner cover 11 refers to the cover disposed on the side of the outer cover 12 closer to the inside of the generator. One of the inner cover 11 and the outer cover 12 is connected to the rotor shaft 2 of the generator and moves under the drive of the rotor shaft 2, causing relative movement between the inner cover 11 and the outer cover 12. Exemplarily, two connection methods for the rotor shaft 2 and the cover assembly 1 are provided: the rotor shaft 2 is connected to the inner cover 11, while the outer cover 12 remains stationary, thus allowing relative movement between the inner cover 11 and the outer cover 12; or the rotor shaft 2 can be connected to the outer cover 12, while the inner cover 11 remains stationary, also allowing relative movement between the inner cover 11 and the outer cover 12. When the generator equipped with the aforementioned protective cover assembly 1 is used in a harvester in agricultural machinery, there is a large amount of straw debris and dust in the working environment. The straw debris and dust can easily enter the air inlet 13 of the protective cover assembly 1, causing blockage of the air inlet 13. Most of the straw debris and dust and other impurities block the air inlet 13 of the outer cover 12, and may also block the air inlet 13 of the inner cover 11. The straw debris blocking the protective cover assembly 1 has a certain length and may protrude from the end face of the outer cover 12 and / or the inner cover 11. In this embodiment, through the relative movement of the inner cover 11 and the outer cover 12, the straw debris and dust and other impurities blocking the air inlet 13 of the outer cover 12 and / or the inner cover 11 can be cleaned to improve the unobstructed flow of the air inlet 13 of the protective cover assembly 1.

[0037] It should be noted that the number of protective covers in the protective cover assembly 1 is not limited here. Two or more protective covers can be set, as long as the inner protective cover 11 adjacent to the outer protective cover 12 can rotate relative to each other.

[0038] It should also be noted that air inlets 13 are provided on both the inner protective cover 11 and the outer protective cover 12.

[0039] It should also be noted that the manner in which the rotation of the rotor shaft 2 drives the movement of either the inner protective cover 11 or the outer protective cover 12 is not limited, such as... Figure 1 and Figure 2 As shown, if rotor shaft 2 is fixedly connected to the other, then rotor shaft 2 and the other will rotate synchronously; as Figures 4-6 As shown, if a cam is provided on the rotor shaft 2, and the cam is provided with connecting holes (i.e., the first hole 111 and the second hole 121 described later), and the connecting holes are provided with circumferentially distributed arc-shaped parts and linear parts, then the rotation of the rotor shaft 2 will cause the cam to move, specifically, the rotation of the rotor shaft 2 will cause the cam to move intermittently.

[0040] When the air inlet 13 of the generator housing 1 is blocked by straw fragments, dust, or other impurities, that is, when the air inlet 13 of the inner housing 11 and / or the outer housing 12 is blocked, the inner housing 11 and the outer housing 12 move relative to each other and are arranged adjacently to form a shear-like structure. This structure has a certain shearing and shaking effect on the straw fragments, dust, and other impurities entering the air inlet 13 of the inner housing 11 and / or the outer housing 12, thereby cleaning the impurities and solving the problem of blocked heat dissipation air ducts of the generator, thereby improving the heat dissipation efficiency of the generator.

[0041] In some embodiments, please refer to Figure 1 and Figure 2 The rotor shaft 2 is connected to the inner cover 11, and the inner cover 11 rotates under the drive of the rotor shaft 2. That is, when the generator is in operation, the rotor shaft 2 will drive the inner cover 11 to rotate synchronously, while the outer cover 12 is fixedly installed at the end of the generator and remains stationary, thus achieving relative rotation between the inner cover 11 and the outer cover 12. Since the rotor shaft 2 is located inside the generator, this arrangement facilitates the connection between the rotor shaft 2 and the inner cover 11, improving the convenience of connecting the rotor shaft 2 and the cover assembly 1.

[0042] Furthermore, a speed reduction mechanism can be provided between the connection position of the rotor shaft 2 and the inner cover 11. Since the rotor shaft 2 rotates at a relatively high speed, this can reduce the rotation speed of the inner cover 11 and also reduce the relative rotation speed of the inner cover 11 and the outer cover 12, so as to ensure the stability of the rotation of the inner cover 11 and the outer cover 12 and reduce the frictional loss when the inner cover 11 and the outer cover 12 rotate relative to each other.

[0043] For example, the reduction mechanism can be a gear set structure, a worm gear structure, or a planetary gear structure, etc.

[0044] In some embodiments, the rotor shaft 2 is connected to the outer cover 12, the rotor shaft 2 passes through the inner cover 11, and a bearing is provided between the rotor shaft 2 and the inner cover 11. The outer cover 12 rotates under the drive of the rotor shaft 2 (not shown in the figure of this embodiment). That is, when the generator is in working condition, the rotor shaft 2 will drive the outer cover 12 to rotate synchronously, while the inner cover 11 is fixedly installed in the generator and is in a stationary state. A bearing is provided between the inner cover 11 and the rotor shaft 2, and the bearing is sleeved on the rotor shaft 2 so that the rotation of the rotor shaft 2 will not drive the inner cover 11 to rotate, thus realizing the relative rotation of the inner cover 11 and the outer cover 12. With this configuration, when the harvester equipped with the generator of the aforementioned protective cover assembly 1 is working in a farmland environment, the outer cover 12 will rotate continuously when the motor is in operation. This greatly reduces the probability that a large amount of straw debris and dust in the working environment will enter the air inlet 13 of the outer cover 12. This also reduces the probability that straw debris, dust and other impurities will clog the air inlet 13 of the outer cover 12, thereby improving the heat dissipation effect of the air inlet 13 of the outer cover 12.

[0045] Furthermore, since the outer cover 12 rotates synchronously with the rotor shaft 2, this can accelerate the flow of gas, increase the gas flow efficiency, and thus improve the heat dissipation efficiency.

[0046] In addition, since the outer cover 12 is rotating in this embodiment, the centrifugal force of the outer cover 12 can throw out some of the straw fragments and dust and other impurities located in the air inlet 13 of the outer cover 12, thus improving the cleaning efficiency of the impurities located in the air inlet 13 of the outer cover 12.

[0047] In some embodiments, the distance between the inner cover 11 and the outer cover 12 in the axial direction of the rotor shaft 2 is L1, and 2mm≤L1≤3mm. When the harvester equipped with the generator of the protective cover assembly 1 is working in an agricultural environment, straw fragments and dust and other impurities may enter the generator through the air inlet 13 opened on the outer protective cover 12 and / or the inner protective cover 11. When the straw fragments and dust and other impurities are located in the air inlet 13 of the outer protective cover 12 and / or the inner protective cover 11, since the straw fragments have a certain length, by keeping the distance between the inner protective cover 11 and the outer protective cover 12 within the above-mentioned range, it can be ensured that when the inner protective cover 11 and the outer protective cover 12 rotate relative to each other, a shear-like structure is formed, thereby shearing the straw fragments that have entered the air inlet 13 of the inner protective cover 11 and / or the outer protective cover 12 and further breaking them down. Smaller straw fragments can fall out of the air inlet 13, while dust can be shaken off by rotation. In this way, the straw fragments and dust and other impurities located in the air inlet 13 can be cleaned.

[0048] For example, the distance L1 between the inner cover 11 and the outer cover 12 in the axial direction of the rotor shaft 2 can be: 2mm, 2.1mm, 2.3mm, 2.5mm, 2.7mm, 2.9mm, 3mm, etc.

[0049] Of course, the distance L1 between the inner protective cover 11 and the outer protective cover 12 can also be 1mm, 1.5mm, 1.8mm, 3.5mm, 4mm, 5mm, etc.

[0050] It should be noted that the axial direction of rotor shaft 2 refers to... Figure 1 The direction indicated by the double-headed arrow X.

[0051] In some embodiments, a protrusion (not shown) is provided on the side of the inner cover 11 near the outer cover 12. During the relative movement of the inner cover 11 and the outer cover 12, the protrusion can act as a brush to clean the straw debris and dust and other impurities that are blocked in the air inlet 13 of the outer cover 12. Thus, when the generator is working and the inner cover 11 and the outer cover 12 are moving relative to each other, while shearing the straw debris, the protrusion on the inner cover 11 will also sweep away the straw debris and dust and other impurities in the air inlet 13 of the outer cover 12 as the inner cover 11 and the outer cover 12 rotate relative to each other, thereby improving the cleaning effect on the air inlet 13 of the outer cover 12.

[0052] For example, the protrusion can be a flexible protrusion or a rigid protrusion. When the protrusion is a flexible protrusion, it can reduce the wear of the inner cover 11 and / or the outer cover 12 caused by the flexible protrusion. When the protrusion is a rigid protrusion, it can improve the cleaning effect of the rigid protrusion on straw fragments and dust and other impurities that are blocked in the air inlet 13 of the outer cover 12.

[0053] Alternatively, a protrusion can be provided on the side of the outer cover 12 near the inner cover 11 to clean straw fragments, dust and other impurities in the air inlet 13 located in the inner cover 11.

[0054] Furthermore, in some embodiments, a plurality of protrusions are evenly arranged circumferentially on the inner cover 11. This arrangement enables uniform and thorough cleaning of the air inlets 13 distributed at various positions on the outer cover 12, thereby improving the cleaning effect on the air inlets 13 of the outer cover 12.

[0055] In some embodiments, the protrusion height of the protrusion in the axial direction of the rotor shaft 2 is 1 mm to 3 mm, and the distance between the protruding end of the protrusion and the outer cover 12 is L2, where 2 mm ≤ L2 ≤ 3 mm. When the harvester of the generator equipped with the cover assembly 1 operates in an agricultural environment, straw debris may enter the generator through the air inlet 13 opened on the outer cover 12 and / or the inner cover 11. When the straw debris is located in the air inlet 13 of the outer cover 12 and / or the inner cover 11, since the straw debris has a certain length, by keeping the distance between the protruding end of the protrusion and the outer cover 12 within the above-mentioned range, it can be ensured that when the inner cover 11 and the outer cover 12 move relative to each other, the rotation of the protrusion relative to the outer cover 12 can clean the straw debris blocking the air inlet 13 of the outer cover 12, thereby reducing the blockage of the air inlet 13 of the outer cover 12 by straw debris.

[0056] For example, the distance L2 between the protrusion and the outer cover 12 along the axial direction of the rotor shaft 2 can be: 2mm, 2.1mm, 2.3mm, 2.5mm, 2.7mm, 2.9mm, 3mm, etc. The protrusion height of the protrusion can be: 1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, 2.5mm, 2.8mm, 2.9mm, 3mm, etc.

[0057] In some embodiments, since the outer cover 12 is located outside the generator relative to the inner cover 11, it has a greater blocking effect on impurities such as straw fragments and dust. Therefore, the diameter of the air inlet 13 on the outer cover 12 is made smaller. That is, the diameter of the air inlet 13 on the inner cover 11 is larger than the diameter of the air inlet 13 on the outer cover 12. With this arrangement, when the generator is in operation, the inner cover 11 and the outer cover 12 will move relative to each other. This reduces the obstruction of the air inlet 13 on the inner cover 11 to the air inlet 13 on the outer cover 12, thereby ensuring the air intake efficiency of the cover assembly 1 through the air inlet 13. At the same time, it can also improve the effect of the cover assembly 1 in blocking and filtering impurities to a certain extent.

[0058] Of course, without considering the above effects, the diameter of the air inlet 13 on the inner cover 11 can be equal to the diameter of the air inlet 13 on the outer cover 12; or, the diameter of the air inlet 13 on the inner cover 11 can be smaller than the diameter of the air inlet 13 on the outer cover 12.

[0059] In some embodiments, the generator housing assembly 1 further includes a rotating shaft (not shown) connected to the other of the inner housing 11 and the outer housing 12, and the rotating shaft is connected to a drive element (such as an electric motor, fan, etc., not shown in the figure). The drive element drives the rotating shaft to rotate, thereby driving the housing rotatably connected to it to rotate. Exemplarily, two connection methods are provided here: the rotor shaft 2 is connected to the inner housing 11, and the rotating shaft located outside the outer housing 12 is connected to the outer housing 12. That is, the generator rotor shaft 2 drives the inner housing 11 to rotate synchronously, and the rotating shaft of the drive element drives the outer housing 12 to rotate synchronously. The two housings have different power sources. This configuration allows both the inner housing 11 and the outer housing 12 to rotate, thus improving the cleaning efficiency of straw fragments, dust, and other impurities located at the air inlet 13 of the housing assembly 1.

[0060] Based on the above embodiments, the rotation direction of the rotating shaft is further opposite to that of the rotor shaft 2. That is, the rotation directions of the inner cover 11 and the outer cover 12 are opposite. This can increase the relative rotation speed between the inner cover 11 and the outer cover 12, further improving the cleaning efficiency of the air inlet 13 of the outer cover 12 and / or the inner cover 11. Furthermore, since the outer cover 12 is rotating, on the one hand, the probability of straw fragments and dust and other impurities entering the generator through the air inlet 13 of the outer cover 12 is reduced; on the other hand, the centrifugal force when the outer cover 12 rotates can throw out straw fragments and dust and other impurities located inside the outer cover 12, reducing the probability of straw fragments and dust and other impurities blocking the air inlet 13.

[0061] Alternatively, based on the above embodiments, the rotation direction of the rotating shaft is the same as that of the rotor shaft 2, but the rotational speed of the rotating shaft is different from that of the rotor shaft 2. This also ensures relative rotation between the inner cover 11 and the outer cover 12, so as to clean the straw fragments, dust, and other impurities that are blocking the air inlet 13 of the inner cover 11 and / or the outer cover 12. In this configuration, the outer cover 12 also rotates, which reduces the probability of straw fragments, dust, and other impurities entering the generator through the air inlet 13 of the outer cover 12; and the centrifugal force can throw out the straw fragments, dust, and other impurities located in the outer cover 12, reducing the probability of straw fragments, dust, and other impurities blocking the air inlet 13.

[0062] In some embodiments, please refer to Figures 4 to 6The rotor shaft 2 is provided with a first cam 3 and a second cam 4; the inner cover 11 has a first hole 111 through which the rotor shaft 2 passes and cooperates with the first cam 3, and the hole wall of the first hole 111 includes a first arc-shaped portion 1111 and a first linear portion 1112 distributed in a circumferential direction; the outer cover 12 has a second hole 121 through which the rotor shaft 2 passes and cooperates with the second cam 4, and the hole wall of the second hole 121 includes a second arc-shaped portion 1211 and a second linear portion 1212 distributed in a circumferential direction. Specifically, during the rotation of the rotor shaft 2, when the first cam 3 of the rotor shaft 2 rotates within the angular range distributed in the first arc-shaped portion 1111, the inner cover 11 does not move because the first cam 3 does not abut against the first arc-shaped portion 1111. However, when the first cam 3 of the rotor shaft 2 rotates within the angular range distributed in the first linear portion 1112, the first cam 3 abuts against the first linear portion 1112 and exerts a pressing force on the inner cover 11, causing the inner cover 11 to move. Similarly, when the second cam 4 of the rotor shaft 2 rotates within the angular range distributed in the second arc-shaped portion 1211, the outer cover 12 does not move because the second cam 4 does not abut against the second arc-shaped portion 1211. However, when the second cam 4 of the rotor shaft 2 rotates within the angular range distributed in the second linear portion 1212, the second cam 4 abuts against the second linear portion 1212 and exerts a pressing force on the outer cover 12, causing the outer cover 12 to move. In this embodiment, the first cam 3 and the second cam 4 are offset in the circumferential direction of the rotor shaft 2, meaning that the projections of the first cam 3 and the second cam 4 do not coincide in the axial direction of the rotor shaft 2; and / or, the first linear portion 1112 and the second linear portion 1212 are offset in the circumferential direction of the rotor shaft 2, meaning that the projections of the first linear portion 1112 and the second linear portion 1212 do not coincide in the axial direction of the rotor shaft 2. With this configuration, when the rotor shaft 2 rotates, at least one of the timing and direction of movement of the inner protective cover 11 is different from at least one of the timing and direction of movement of the outer protective cover 12. This allows the inner protective cover 11 and the outer protective cover 12 to move relative to each other, thereby enabling the cleaning of straw fragments, dust, and other impurities from the air inlets 13 located on the inner protective cover 11 and / or the outer protective cover 12.

[0063] For example, the following configurations of the first cam 3, the second cam 4, the first linear portion 1112, and the second linear portion 1212 are provided: the first cam 3 and the second cam 4 are offset in the circumferential direction of the rotor shaft 2, and the first linear portion 1112 and the second linear portion 1212 are not offset in the circumferential direction of the rotor shaft 2; the first cam 3 and the second cam 4 are not offset in the circumferential direction of the rotor shaft 2, and the first linear portion 1112 and the second linear portion 1212 are offset in the circumferential direction of the rotor shaft 2; the first cam 3 and the second cam 4 are offset in the circumferential direction of the rotor shaft 2, and the first linear portion 1112 and the second linear portion 1212 are also offset in the circumferential direction of the rotor shaft 2.

[0064] Furthermore, based on the above embodiments, the first cam 3 and the second cam 4 are aligned in the circumferential direction of the rotor shaft 2, and / or the first linear portion 1112 and the second linear portion 1212 are aligned in the circumferential direction of the rotor shaft 2. Thus, when the rotor shaft 2 rotates, the movement direction of the inner cover 11 is opposite to that of the outer cover 12, thereby increasing the relative movement distance between the inner cover 11 and the outer cover 12, and consequently improving the cleaning efficiency of straw fragments, dust, or impurities within the air inlet 13 on the inner cover 11 and / or the outer cover 12.

[0065] Meanwhile, in order to ensure that the first cam 3 and the second cam 4 can properly cooperate with the stacked inner cover 11 and outer cover 12, the first cam 3 and the second cam 4 need to be in different positions in the axial direction of the rotor shaft 2.

[0066] Furthermore, this application also provides a generator that includes the shield assembly 1 of any of the above-mentioned components. Since this generator includes the aforementioned shield assembly 1, the beneficial effects of the generator brought by the shield assembly 1 are as described above and will not be repeated here.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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 housing assembly, characterized in that, The shield assembly is located at the end of the generator and has an air inlet. The shield assembly includes at least an inner shield and an outer shield arranged adjacent to each other. One of the inner shield and the outer shield is connected to the rotor shaft of the generator and moves under the drive of the rotor shaft, so that the inner shield and the outer shield move relative to each other.

2. The generator casing assembly according to claim 1, characterized in that, The rotor shaft is connected to the inner protective cover, and the inner protective cover rotates under the drive of the rotor shaft.

3. The generator casing assembly according to claim 1, characterized in that, The rotor shaft is connected to the outer protective cover, the rotor shaft passes through the inner protective cover, and a bearing is provided between the rotor shaft and the inner protective cover. The outer protective cover rotates under the drive of the rotor shaft.

4. The generator casing assembly according to any one of claims 1-3, characterized in that, Along the axial direction of the rotor shaft, the distance between the inner protective cover and the outer protective cover is L1, and 2mm≤L1≤3mm.

5. The generator housing assembly according to claim 1, characterized in that, The inner protective cover has a protrusion on the side near the outer protective cover, and multiple protrusions are evenly distributed in the circumferential direction of the inner protective cover.

6. The generator housing assembly according to claim 5, characterized in that, Along the axial direction of the rotor shaft, the protrusion height of the protrusion is 1mm to 3mm, and the distance between the protruding end of the protrusion and the outer cover is L2, where 2mm≤L2≤3mm.

7. The generator housing assembly according to claim 1, characterized in that, The diameter of the air inlet on the inner protective cover is larger than the diameter of the air inlet on the outer protective cover.

8. The generator housing assembly according to claim 1, characterized in that, It also includes a pivot connected to the other of the inner and outer protective covers, and the pivot is connected to a drive member, wherein: The rotation direction of the rotating shaft is opposite to the rotation direction of the rotor shaft; And / or, the rotation direction of the rotating shaft is the same as the rotation direction of the rotor shaft, and the rotation speed of the rotating shaft is different from the rotation speed of the rotor shaft.

9. The generator housing assembly according to claim 1, characterized in that, A first cam and a second cam are provided on the rotor shaft; The inner cover has a first hole through which the rotor shaft passes and engages with the first cam. The wall of the first hole includes a first arc-shaped portion and a first linear portion distributed circumferentially. The outer cover has a second hole through which the rotor shaft passes and engages with the second cam. The hole wall of the second hole includes a second arc-shaped portion and a second linear portion in a circumferential division. Wherein, the first cam and the second cam are offset in the circumferential direction of the rotor shaft; and / or, the first linear portion and the second linear portion are offset in the circumferential direction of the rotor shaft.

10. A generator, characterized in that, The protective enclosure assembly of the generator as described in any one of claims 1-9.

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