A gas balancing device for a high-voltage electric motor

Abstract

This utility model relates to the field of high-voltage motor technology and discloses a gas balancing device for a high-voltage motor, including a mounting base, a high-voltage motor body, a connecting shell, and a rear end cover. The high-voltage motor body is fixedly mounted on the top of the mounting base, the connecting shell is fixedly mounted on one end of the high-voltage motor body, and the rear end cover is fixedly mounted on one end of the connecting shell. The device further includes a leak-proof mechanism and a filtering mechanism, with the leak-proof mechanism located on one side of the rear end cover. This utility model, through the cooperation of the connecting cover, rotating block, bearing plate, through hole, metal bellows, and plastic connector, allows for convenient and quick assembly of the gas balancing device with the high-voltage motor body, facilitating subsequent disassembly, maintenance, and cleaning. Simultaneously, the metal bellows guides the internal pressure and oil mist within the high-voltage motor body's internal chamber, preventing excessive internal pressure from causing lubricating oil leakage.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage motor technology, specifically a gas balancing device for high-voltage motors. Background Technology

[0002] High-voltage motors refer to motors with a rated voltage of 1000V and above. They are the core power equipment for driving various large-scale machinery and equipment in industrial production. They are widely used in fields such as power, metallurgy, mining, chemical industry, water conservancy, and building materials. Common rated voltages include 3kV, 6kV, and 10kV. Under the same power, they can significantly reduce the current compared to low-voltage motors (such as 380V), reducing the power loss of transmission lines. They are suitable for high-power equipment and long-distance power supply scenarios. The power usually ranges from tens of kilowatts to thousands of kilowatts and can drive heavy machinery such as large fans, water pumps, compressors, rolling mills, and crushers.

[0003] An existing patent (publication number: CN213521476U) discloses a DC motor that can effectively prevent oil leakage. Through the setting of a collection box and a conduit, there are many reasons for oil leakage inside the motor. One reason is that when the heat dissipation holes of the front cover become blocked, the internal temperature continues to rise, causing the pressure difference to become more obvious. As a result, lubricating oil will leak from the gap of the shaft connection into the collection box. The control valve is kept open. When the leaking lubricating oil is found to be leaking from the conduit, the staff will know that there is an oil leakage inside the motor and can clean the heat dissipation holes of the motor in time to cool the motor.

[0004] To address the aforementioned issues, while existing patents can prevent oil leakage from the motor through the use of components such as collection boxes, in practical use, oil leakage from the sliding bearing structure and the phenomenon of excessive oil mist adhering to the motor winding surface due to high lubricating oil temperature during prolonged motor operation still exist. Additionally, the sliding bearing experiences a large pressure difference between its inner and outer surfaces. In forced-lubrication bearings, the lubricating oil itself has a certain pressure, and air bubbles are generated during shaft rotation, creating further pressure. During motor operation, the shaft speed drives airflow, increasing the pressure difference between the inner and outer surfaces of the oil chamber, leading to oil leakage. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] Given that the existing technology still suffers from oil leakage in sliding bearing structures and the phenomenon of excessive oil mist adhering to the motor winding surface due to high lubricating oil temperature during prolonged motor operation, coupled with the large pressure difference between the inside and outside of the sliding bearing, and the forced lubrication of the bearing bush where the lubricating oil itself has a certain pressure, air bubbles are generated during shaft rotation, creating additional pressure. During motor operation, the shaft speed drives airflow, increasing the pressure difference between the inside and outside of the oil chamber, leading to oil leakage.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A high-voltage electric motor gas balancing device includes: a mounting base, a high-voltage electric motor body, a connecting shell, and a rear end cover; the high-voltage electric motor body is fixedly mounted on the top of the mounting base, the connecting shell is fixedly mounted on one end of the high-voltage electric motor body, and the rear end cover is fixedly mounted on one end of the connecting shell; the device also includes:

[0009] A leak-proof mechanism and a filtering mechanism; the leak-proof mechanism is located on one side of the rear end cover, and the filtering mechanism is located on one side of the leak-proof mechanism.

[0010] As a further embodiment of this utility model: the anti-leakage mechanism includes a connecting cover, which is sleeved on the outer wall of the connecting shell, and a rotating block is rotatably connected to the front end of the connecting cover. A rotating groove is provided on the outer wall of the rotating block corresponding to the position of the connecting cover.

[0011] As a further improvement of this utility model: a bearing plate is fixedly installed at one end of the rotating block, and a through hole is provided on the inner wall of the rear end cover.

[0012] As a further embodiment of this utility model: a metal corrugated pipe extends from the inside of the bearing plate, and a plastic connector is fixedly installed at one end of the metal corrugated pipe, and a connecting block is fixedly installed at the end of the metal corrugated pipe that enters the bearing plate.

[0013] As a further embodiment of this utility model: the connecting shell and the connecting cover are threadedly connected, and the connecting cover and the rotating block form a rotating structure.

[0014] As a further embodiment of this utility model: the metal corrugated pipe extends into the interior of the connecting shell and also extends into the interior of the bearing plate.

[0015] As a further embodiment of this utility model: the filtering mechanism includes a filter cylinder, which extends out of the interior of the connecting block, and the interior of the filter cylinder is provided with a flow hole.

[0016] As a further embodiment of this utility model: a plug-in shell is fixedly installed at one end of the filter cylinder, and an abutment block is fixedly installed inside the connecting block on one side of the filter cylinder.

[0017] As a further improvement of this utility model: a first filter plate is embedded inside the flow hole, and a second filter plate is fixedly installed on one side of the first filter plate inside the flow hole.

[0018] As a further embodiment of this utility model: the filter cylinder is connected to the metal bellows, and the plug-in shell is threadedly connected to the connecting block.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. This utility model, through the cooperation of the connecting cover, rotating block, bearing plate, through hole, metal bellows and plastic joint, can facilitate the quick and easy assembly of the gas balance device with the high-voltage motor body, which is convenient for maintenance and cleaning after disassembly. At the same time, the internal pressure and oil mist in the internal chamber of the high-voltage motor body are discharged through the guidance of the metal bellows, thereby avoiding the situation where excessive internal pressure compresses the lubricating oil and causes leakage.

[0021] 2. This utility model, through the cooperation of filter cylinder, flow hole, plug-in shell, contact block, first filter plate and second filter plate, can filter the flowing gas and oil mist, avoid the discharge from affecting the surrounding environment, and at the same time play a double-layer filtration role to improve the overall filtration effect, and facilitate the disassembly and assembly of filter cylinder for easy maintenance and cleaning. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a gas balancing device for a high-voltage electric motor.

[0023] Figure 2 A schematic diagram of the connecting shell structure of a high-voltage electric motor gas balance device;

[0024] Figure 3 A schematic diagram of the support plate structure of a gas balance device for a high-voltage electric motor;

[0025] Figure 4 A schematic diagram of the plug-in housing structure of a gas balance device for a high-voltage electric motor;

[0026] Figure 5 A schematic diagram of the first filter plate structure of a high-voltage electric motor gas balancing device;

[0027] In the diagram: 1. Mounting base; 2. High-voltage motor body; 3. Connecting shell; 4. Rear end cover; 5. Leakage prevention mechanism; 501. Connecting cover; 502. Rotating block; 503. Rotating groove; 504. Bearing plate; 505. Through hole; 506. Metal bellows; 507. Plastic connector; 508. Connecting block; 6. Filtering mechanism; 601. Filter cylinder; 602. Flow hole; 603. Insertion shell; 604. Contact block; 605. First filter plate; 606. Second filter plate. Detailed Implementation

[0028] To make the above-mentioned objectives, features and advantages of this utility model more readily understood, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0031] Example 1:

[0032] Please see Figure 1 - Figure 4 This is the first embodiment of the present utility model.

[0033] This embodiment provides a gas balancing device for a high-voltage electric motor, including: a mounting base 1, a high-voltage electric motor body 2, a connecting shell 3, and a rear end cover 4; the high-voltage electric motor body 2 is fixedly mounted on the top of the mounting base 1, the connecting shell 3 is fixedly mounted on one end of the high-voltage electric motor body 2, and the rear end cover 4 is fixedly mounted on one end of the connecting shell 3, and further includes:

[0034] Leakage prevention mechanism 5 and filter mechanism 6; leakage prevention mechanism 5 is located on one side of rear end cover 4, and filter mechanism 6 is located on one side of leakage prevention mechanism 5.

[0035] Specifically, the leak prevention mechanism 5 includes a connecting cover 501, which is sleeved on the outer wall of the connecting shell 3. A rotating block 502 is rotatably connected to the front end of the connecting cover 501, and a rotating groove 503 is provided on the outer wall of the rotating block 502 corresponding to the position of the connecting cover 501.

[0036] Furthermore, the rotating block 502 is rotatably connected to the connecting cover 501 through the rotating groove 503, which allows the rotating block 502 to remain stable and not rotate along with the connecting cover 501 when it is connected to the connecting shell 3 and rotates.

[0037] Specifically, a bearing plate 504 is fixedly installed at one end of the rotating block 502, and a through hole 505 is opened on the inner wall of the rear end cover 4.

[0038] Furthermore, the support plate 504 is fixed to one end of the rotating block 502, so that it can be rotatably connected to the connecting cover 501, while avoiding being affected by the connecting cover 501 and rotating with it, thus maintaining the stability of the support plate 504.

[0039] Specifically, a metal corrugated pipe 506 extends from the inside of the support plate 504, a plastic connector 507 is fixedly installed at one end of the metal corrugated pipe 506, and a connecting block 508 is fixedly installed at the end of the metal corrugated pipe 506 that enters the support plate 504.

[0040] Furthermore, the plastic connector 507 at one end of the metal bellows 506 is inserted into the internal cavity of the high-voltage motor body 2, which can discharge the overheated oil mist inside, thereby avoiding excessive internal pressure due to heat overload and leakage.

[0041] Specifically, the connecting shell 3 is threadedly connected to the connecting cover 501, and the connecting cover 501 and the rotating block 502 form a rotating structure.

[0042] Furthermore, the connecting shell 3 and the connecting cover 501 are threaded together, which allows for quick disassembly and assembly, and enables the metal bellows 506 to detach from the high-voltage motor body 2, facilitating later maintenance, etc.

[0043] Specifically, the metal bellows 506 extends into the interior of the connecting shell 3 and into the interior of the support plate 504.

[0044] Furthermore, the metal bellows 506 has a certain degree of elasticity, which allows it to adapt to the expansion and contraction caused by thermal expansion and contraction when inserted into the high-voltage motor body 2, thus preventing breakage over time.

[0045] In use, the high-voltage motor body 2 is fixedly supported by the mounting base 1. At the same time, the connecting shell 3 and the rear end cover 4 are fixed to one side of the high-voltage motor body 2. The threaded connection facilitates the disassembly and assembly of the connecting cover 501, thereby making it convenient to disassemble and assemble the entire starting balance device. When the connecting cover 501 is connected to the rear end cover 4, the metal bellows 506 and the plastic connector 507 are inserted into the internal cavity of the high-voltage motor body 2 through the through hole 505. The metal bellows 506 is fixed with the support plate 504 and the connecting block 508. At the same time, the rotating block 502 and the rotating groove 503 cooperate to rotate and connect with the connecting cover 501 to avoid the limit when the metal bellows 506 is inserted. This can discharge the oil mist and internal pressure inside the high-voltage motor body 2 and prevent leakage.

[0046] In summary, when the metal bellows 506 is inserted into the plastic connector 507, it can guide the internal pressure and oil mist in the internal chamber of the high-voltage motor body 2, preventing excessive internal pressure from causing leakage and thus achieving a certain leak-proof effect. At the same time, the thermal expansion and contraction of the metal bellows 506 prevents it from being affected by heat and breaking over time. The support plate 504 and the connecting block 508 fix the metal bellows 506, and the threaded connection between the connecting cover 501 and the connecting shell 3 makes it easy to fix the metal bellows 506 and prevent it from easily falling off or loosening, while also facilitating disassembly and maintenance.

[0047] Example 2:

[0048] Please see Figure 1 , Figure 3 , Figure 4 and Figure 5 This is the second embodiment of the present utility model.

[0049] Specifically, the filter mechanism 6 includes a filter cylinder 601, which extends out of the interior of the connecting block 508, and a flow hole 602 is provided inside the filter cylinder 601.

[0050] Furthermore, the flow hole 602 opened through the filter cartridge 601 can communicate with the metal bellows 506, allowing the internal pressure and oil mist to be discharged, avoiding accumulation that could lead to leakage.

[0051] Specifically, a plug-in housing 603 is fixedly installed at one end of the filter cartridge 601, and an abutment block 604 is fixedly installed inside the connecting block 508 on one side of the filter cartridge 601.

[0052] Furthermore, the filter cartridge 601 extends through the connecting block 508 and is threadedly connected to the plug-in housing 603, facilitating quick disassembly, replacement, or maintenance.

[0053] Specifically, a first filter plate 605 is embedded inside the flow hole 602, and a second filter plate 606 is fixedly installed on one side of the first filter plate 605 inside the flow hole 602.

[0054] Furthermore, the pores of the first filter plate 605 and the second filter plate 606 are of different sizes, which achieves a double-layer filtration effect. The inclined structure allows impurities to slide to one end, maintaining a certain amount of pore space for gas flow even when there are many impurities.

[0055] Specifically, the filter cartridge 601 is connected to the metal bellows 506, and the plug-in shell 603 is threadedly connected to the connecting block 508.

[0056] Furthermore, the contact block 604 fixed inside the connecting block 508 prevents the filter cartridge 601 from being over-inserted, which would make it inconvenient to disassemble and reassemble later.

[0057] In use, the filter cartridge 601 is connected to the connecting block 508 by a fixed plug-in shell 603. The abutment block 604 prevents the filter cartridge 601 from going too deep into the connecting block 508. The flow hole 602 filters oil and impurities in layers through the first filter plate 605 and the second filter plate 606 set inside, preventing direct discharge.

[0058] In summary, the first filter plate 605 and the second filter plate 606 inside the filter cartridge 601 have different pore sizes, which allows for layered filtration of oil and impurities, improving the filtration effect. The inclined shape allows impurities to slide to one side under pressure along the first filter plate 605 or the second filter plate 606. When there are too many impurities, some pores are reserved to allow internal pressure to be discharged. In conjunction with the plug-in shell 603, it is convenient to disassemble, replace or clean the filter cartridge 601.

[0059] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0060] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0061] It should be understood that numerous specific implementation decisions can be made during the development of any actual implementation method, and in any engineering or design project. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0062] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A gas balancing device for a high-voltage electric motor, characterized in that: include: The system comprises a mounting base (1), a high-voltage motor body (2), a connecting shell (3), and a rear end cover (4); the high-voltage motor body (2) is fixedly mounted on the top of the mounting base (1), the connecting shell (3) is fixedly mounted on one end of the high-voltage motor body (2), and the rear end cover (4) is fixedly mounted on one end of the connecting shell (3). The system also includes: Leakage prevention mechanism (5) and filter mechanism (6); the leakage prevention mechanism (5) is located on one side of the rear end cover (4), and the filter mechanism (6) is located on one side of the leakage prevention mechanism (5).

2. The high-voltage motor gas balancing device according to claim 1, characterized in that: The anti-leakage mechanism (5) includes a connecting cover (501), which is sleeved on the outer wall of the connecting shell (3), and a rotating block (502) is rotatably connected to the front end of the connecting cover (501). A rotating groove (503) is provided on the outer wall of the rotating block (502) corresponding to the position of the connecting cover (501).

3. A high-voltage motor gas balancing device according to claim 2, characterized in that: One end of the rotating block (502) is fixedly installed with a bearing plate (504), and the inner wall of the rear end cover (4) is provided with a through hole (505).

4. A high-voltage motor gas balancing device according to claim 3, characterized in that: A metal corrugated pipe (506) extends through the interior of the support plate (504), and a plastic connector (507) is fixedly installed at one end of the metal corrugated pipe (506). A connecting block (508) is fixedly installed at the end of the metal corrugated pipe (506) that enters the support plate (504).

5. A high-voltage motor gas balancing device according to claim 1, characterized in that: The connecting shell (3) is threadedly connected to the connecting cover (501), and the connecting cover (501) and the rotating block (502) form a rotating structure.

6. A high-voltage motor gas balancing device according to claim 4, characterized in that: The metal bellows (506) extends into the interior of the connecting shell (3) and into the interior of the support plate (504).

7. A high-voltage motor gas balancing device according to claim 1, characterized in that: The filtration mechanism (6) includes a filter cylinder (601), which extends through the interior of the connecting block (508), and a flow hole (602) is provided inside the filter cylinder (601).

8. A high-voltage motor gas balancing device according to claim 7, characterized in that: A plug-in shell (603) is fixedly installed at one end of the filter cylinder (601), and an abutment block (604) is fixedly installed inside the connecting block (508) on one side of the filter cylinder (601).

9. A high-voltage motor gas balancing device according to claim 7, characterized in that: The flow hole (602) is fitted with a first filter plate (605), and a second filter plate (606) is fixedly installed on one side of the first filter plate (605) inside the flow hole (602).

10. A high-voltage motor gas balancing device according to claim 7, characterized in that: The filter cartridge (601) is connected to the metal bellows (506), and the plug-in shell (603) is threadedly connected to the connecting block (508).

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