Generator

Abstract

The embodiment of the utility model provides a generator, and relates to the field of generators. The generator comprises a generator shell and a rotary rectifier module, the generator shell is connected with a heat dissipation cover, a containing cavity is formed between the generator shell and the heat dissipation cover, and the rotary rectifier module is installed in the containing cavity. According to the generator, the rotary rectifier module is transferred from the inside of the generator shell to the outside of the generator shell, on one hand, heat of the exciter rotor iron core is prevented from being transferred to the rotary rectifier module, the working temperature of the rotary rectifier module can be reduced, and on the other hand, heat inside the generator shell is reduced; the internal temperature of the generator housing can be reduced, and the maintenance and replacement of the rotary rectification module and the measurement of the electrical parameters of each pin lead can be facilitated.

Description

Technical Field

[0001] This utility model relates to the field of generators, and more specifically, to a generator. Background Technology

[0002] The fully enclosed electrically excited brushless synchronous generator is a type of motor that does not require regular replacement of carbon brushes and slip rings. It has the advantages of high reliability, simple maintenance, and the ability to operate continuously for a long time, so it is widely used in power plants and some harsh environments.

[0003] Most existing fully enclosed electrically excited brushless synchronous generators mount the rotating rectifier module on the exciter rotor core. The rotating rectifier module is located inside the fully enclosed generator, such as... Figure 4 Placing the rotating rectifier module inside the generator presents several problems: First, the rotating rectifier module itself generates heat during operation, which dissipates into the generator, hindering temperature reduction within the generator. Second, the exciter rotor core heats up during generator operation, transferring heat to the rotating rectifier module and increasing its operating temperature. Third, it hinders the maintenance and replacement of the rotating rectifier module, as well as the measurement of electrical parameters of its pins and leads. Utility Model Content

[0004] This invention provides a generator that can solve the aforementioned problems of existing fully enclosed generators.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] An embodiment of this utility model provides a generator, which includes:

[0007] The generator housing is connected to a heat sink, and a accommodating chamber is formed between the generator housing and the heat sink.

[0008] A rotary rectifier module is installed inside the accommodating chamber.

[0009] Optionally, the generator also includes a shaft with holes for arranging wiring harnesses.

[0010] Optionally, the channel includes a first blind hole and a second blind hole, each having a first end and a second end. The first end of the first blind hole penetrates the side wall surface of the rotating shaft, and the first end of the second blind hole penetrates the end face of the rotating shaft. The second ends of the first blind hole and the second blind hole are connected.

[0011] Optionally, there is a gap between the hole wall of the first blind hole and the wire harness, and the gap is filled with sealant.

[0012] Optionally, the generator also includes a main rotor winding and an exciter rotor winding, with a gap space between the main rotor winding and the exciter rotor winding, and the first end of the first blind hole is located in the gap space.

[0013] Optionally, the central axis of the second blind hole coincides with the central axis of the rotating shaft.

[0014] Optionally, the angle between the axis of the first blind hole and the axis of the rotating shaft is β, where 15°≤β≤60°.

[0015] Optionally, a fan is provided in the accommodating chamber, and the fan is connected to the rotating shaft through a bushing, with the rotary rectifier module installed on the bushing.

[0016] Optionally, the rotary rectifier module includes a mounting plate with screw holes.

[0017] The bushing has a threaded hole that matches the screw hole, and the mounting plate is threadedly connected to the bushing.

[0018] Optionally, a radiator is provided in the accommodating chamber, the radiator is mounted on the heat sink, and the rotary rectifier module is mounted on the rotating shaft.

[0019] The beneficial effects of this utility model embodiment:

[0020] The generator of this embodiment includes a generator housing and a rotating rectifier module. A heat sink is connected to the generator housing, and a receiving chamber is formed between the generator housing and the heat sink. The rotating rectifier module is installed within the receiving chamber. This generator moves the rotating rectifier module from inside the generator housing to the outside of the generator housing. This avoids heat transfer from the exciter rotor core to the rotating rectifier module, thus reducing its operating temperature. It also reduces heat inside the generator housing, which is beneficial for lowering the internal temperature of the generator housing. Furthermore, it facilitates the inspection and replacement of the rotating rectifier module and the measurement of the electrical parameters of each pin lead. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram (half-sectional view along the axial direction) of the generator provided in an embodiment of this utility model;

[0023] Figure 2This is a schematic diagram of the rotary rectifier module installed on the bushing in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the rotating shaft and the hole formed on the rotating shaft provided in an embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the structure of an existing fully enclosed electrically excited brushless synchronous generator.

[0026] Icons: 1-Generator housing; 2-Heat shroud; 3-Accommodation chamber; 30-Fan; 31-Shaft sleeve; 4-Rotating rectifier module; 40-Mounting plate; 5-Shaft; 50-Channel; 501-First blind hole; 502-Second blind hole; 6-Main rotor winding; 7-Exciter rotor winding; 8-Gap space. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0032] The terms “comprising,” “including,” or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] Unless otherwise explicitly specified and limited, terms such as "setup" and "connection" should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0035] An embodiment of this utility model provides a generator that can solve the problems described in the background art, which will be described in detail below.

[0036] Please refer to Figures 1 to 3 The generator includes a generator housing 1 and a rotating rectifier module 4. A heat sink 2 is connected to the generator housing 1, and a receiving chamber 3 is formed between the generator housing 1 and the heat sink 2. The rotating rectifier module 4 is installed within the receiving chamber 3. In this embodiment, the rotating rectifier module 4 is moved from inside the generator housing 1 to outside the generator housing 1. This avoids the heat generated by the exciter rotor core from being transferred to the rotating rectifier module 4, thus reducing its operating temperature. It also reduces the total heat inside the generator housing 1, further lowering its internal temperature. Furthermore, placing the rotating rectifier module 4 outside the generator housing 1 facilitates maintenance and replacement of the rotating rectifier module 4, as well as the measurement of the electrical parameters of its pins.

[0037] The generator housing 1 and the heat sink 2 are detachably connected, facilitating the installation, replacement, and maintenance of the rotating rectifier module 4 within the housing chamber 3. For example, the generator housing 1 and the heat sink 2 are connected by screws or bolts. The heat sink 2 itself has heat dissipation slots that penetrate the housing chamber 3 and the external environment, thereby dissipating the heat generated within the housing chamber 3. The heat dissipation slots can take various forms, such as elongated slots or circular holes; this embodiment does not limit the form of the heat dissipation slots.

[0038] In this embodiment, the generator also includes a rotating shaft 5, which passes through both ends of the generator housing 1, with one end of the rotating shaft 5 extending into the accommodating chamber 3. This end of the rotating shaft 5 extending into the accommodating chamber 3 does not contact the heat sink 2. The heat sink 2 does not affect the rotation of the rotating shaft 5. The rotating shaft 5 and the generator housing 1 are coupled by bearings to achieve mutual rotational engagement.

[0039] The generator also includes a main rotor winding 6 and an exciter rotor winding 7. Both the main rotor winding 6 and the exciter rotor winding 7 are mounted on a rotating shaft 5. The rotating shaft 5 has a channel 50 for arranging wire harnesses. The wire harnesses pass through the channel 50 to connect the rotating rectifier module 4 with the main rotor winding 6 and the exciter rotor winding 7.

[0040] Specifically, the channel 50 includes a first blind hole 501 and a second blind hole 502. Both the first blind hole 501 and the second blind hole 502 have a first end and a second end. The first end of the first blind hole 501 penetrates the side wall surface of the rotating shaft 5, and the first end of the second blind hole 502 penetrates the end face of the rotating shaft 5. The second ends of the first blind hole 501 and the second blind hole 502 are connected, that is, there is an angle between the axis of the first blind hole 501 and the axis of the rotating shaft 5, and the central axis of the second blind hole 502 coincides with the central axis of the rotating shaft 5. The wiring harnesses of the main rotor winding 6 and the exciter rotor winding 7 pass through the first blind hole 501 and the second blind hole 502 and are connected to the rotating rectifier module 4. The second blind hole 502 is opened along the central axis of the rotating shaft 5 to ensure that the lead-out position of the wiring harness at the end of the rotating shaft 5 is centered, avoiding dynamic balance problems caused by the eccentricity of the wiring harness. It is worth mentioning that the first end of the second blind hole 502 is close to the side of the heat sink 2.

[0041] The angle between the axis of the first blind hole 501 and the axis of the rotating shaft 5 is β. The angle β is generally not set to a right angle to avoid excessive bending angle during wire harness arrangement, which could damage the wire harness.

[0042] Optionally, the angle β between the axis of the first blind hole 501 and the axis of the rotating shaft 5 is limited to the range of 15° to 60°, such as 30°, 40°, 45°, etc. The angle β in the range of 15° to 60° can ensure that the bending radius of the wire harness meets the electrical safety standards, and can also reduce the processing and manufacturing difficulty of the first blind hole 501.

[0043] It should be known that a gap space 8 is provided between the main rotor winding 6 and the exciter rotor winding 7. The first end of the first blind hole 501 is located in the gap space 8, which facilitates the simultaneous passage of the wire harnesses connected to the main rotor winding 6 and the exciter rotor winding 7 through the first blind hole 501 and the second blind hole 502. It also avoids friction between the wire harnesses and the hard parts of the main rotor winding 6 or the exciter rotor winding 7.

[0044] Since there are gaps between the wire harness and the walls of the first blind hole 501 and the second blind hole 502 when the wire harness is arranged in them, it is necessary to fix the wire harness in the first blind hole 501 and the second blind hole 502 to prevent friction between the wire harness and the shaft 5 when it rotates. In this embodiment, the wire harness position is fixed by filling the gaps with sealant. The sealant can be a high-temperature resistant adhesive. Using a high-temperature resistant sealant can maintain stability inside the high-temperature generator and also avoid frictional damage to the wire harness caused by the vibration of the shaft 5.

[0045] To further enhance the heat dissipation and cooling effect inside the generator, a fan 30 can be installed inside the housing chamber 3. The fan 30 has multiple blades arranged circumferentially around the rotating shaft 5, and the ends of the multiple blades are connected to the same bushing 31. The bushing 31 is fitted onto the outer peripheral wall of the rotating shaft 5 and fixed to the rotating shaft 5. The rotary rectifier module 4 is installed on the bushing 31. When the rotating shaft 5 rotates, the bushing 31 drives the multiple blades of the fan 30 to rotate. The blades agitate the air to form an airflow that carries away the heat inside the housing chamber 3 and on the generator housing 1, thereby cooling the inside of the generator and the rotary rectifier module 4.

[0046] In this embodiment, the blades of fan 30 are made of lightweight aluminum alloy to reduce rotational inertia. When the shaft 5 rotates at its rated speed (e.g., 1500 r / min), the airflow generated by the fan 30 blades enters the housing chamber 3 through the air inlet of the heat sink 2, flows over the surface of the rotating rectifier module 4, and is discharged from the exhaust port. Of course, the airflow generated by the fan 30 blades can also be optimized by adjusting the blade angle or the air inlet size to meet the heat dissipation requirements of generators with different power ratings.

[0047] The rotary rectifier module 4 includes a mounting plate 40, which is a flat plate with multiple screw holes. The end face of the bushing 31 has multiple threaded holes, the positions and sizes of which are adapted to the screw holes. Various rotary rectifier components are also mounted on the mounting plate 40. The specific types and arrangement of these components in the rotary rectifier module 4 are existing technology and will not be described further here. When screws are installed in the screw holes and threaded holes, the mounting plate 40 can be connected to the bushing 31, thus achieving a detachable connection of the rotary rectifier module 4.

[0048] In another embodiment, a separate radiator can be installed inside the accommodating chamber 3, mounted on the heat sink 2, and the rotary rectifier module 4 is mounted on the rotating shaft 5. The radiator dissipates heat and cools the rotary rectifier module 4 and the interior of the generator. The radiator can be equipped with liquid-cooled pipes or liquid-cooled fins for heat exchange.

[0049] Optionally, a temperature sensor can be installed inside the accommodating chamber 3 to monitor the temperature within it. The temperature sensor can also be connected to a controller, which in turn connects to an alarm. When the temperature sensor detects that the temperature exceeds a preset temperature, the controller instructs the alarm to sound an alarm, alerting the user to the excessively high temperature. Temperature sensors, controllers, and alarms are all common devices available on the market; suitable models can be selected based on specific needs, and will not be listed or limited here.

[0050] The generator of this utility model embodiment has at least the following beneficial effects:

[0051] (1) It reduced the temperature inside the generator casing 1.

[0052] (2) The temperature on the rotating rectifier module 4 was reduced.

[0053] (3) It is beneficial to inspect and replace the rotating rectifier module 4.

[0054] (4) It is beneficial to measure the electrical parameters of each pin lead of the rotating rectifier module 4.

[0055] (5) No need to change the overall structure of the existing fully enclosed brushless motor.

[0056] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A generator, characterized in that, include: A generator housing (1) is connected to a heat sink (2), and a receiving chamber (3) is formed between the generator housing (1) and the heat sink (2). Rotary rectifier module (4) is installed in the accommodating chamber (3).

2. The generator according to claim 1, characterized in that, The generator also includes a rotating shaft (5), on which a channel (50) for arranging wire harnesses is provided.

3. The generator according to claim 2, characterized in that, The channel (50) includes a first blind hole (501) and a second blind hole (502). Both the first blind hole (501) and the second blind hole (502) have a first end and a second end. The first end of the first blind hole (501) penetrates the side wall surface of the rotating shaft (5), and the first end of the second blind hole (502) penetrates the end face of the rotating shaft (5). The second end of the first blind hole (501) and the second end of the second blind hole (502) are connected.

4. The generator according to claim 3, characterized in that, The first blind hole (501) and the second blind hole (502) have gaps between their walls and the wire harness, and these gaps are filled with sealant.

5. The generator according to claim 3, characterized in that, The generator also includes a main rotor winding (6) and an exciter rotor winding (7), with a gap space (8) between the main rotor winding (6) and the exciter rotor winding (7), and the first end of the first blind hole (501) is located in the gap space (8).

6. The generator according to claim 3, characterized in that, The central axis of the second blind hole (502) coincides with the central axis of the rotating shaft (5).

7. The generator according to claim 3, characterized in that, The angle between the axis of the first blind hole (501) and the axis of the rotating shaft (5) is β, 15°≤β≤60°.

8. The generator according to any one of claims 2 to 7, characterized in that, A fan (30) is provided in the accommodating chamber (3). The fan (30) is connected to the rotating shaft (5) through a bushing (31). The rotating rectifier module (4) is installed on the bushing (31).

9. The generator according to claim 8, characterized in that, The rotary rectifier module (4) includes a mounting plate (40) with screw holes. The bushing (31) has a threaded hole that matches the screw hole, and the mounting plate (40) is threadedly connected to the bushing (31).

10. The generator according to any one of claims 2 to 7, characterized in that, A radiator is provided in the accommodating chamber (3), the radiator is installed on the heat sink (2), and the rotary rectifier module (4) is installed on the rotating shaft (5).

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