Air pump motor sealing structure

Abstract

The application belongs to the technical field of air pump motor sealing structure. A partition section (4) is arranged between a stator cavity (2) and a controller cavity (3), a mounting seat hole (5) is arranged on the partition section (4), a mounting seat (6) is clamped in the mounting seat hole (5), a first sealing ring (7) is sleeved on the mounting seat (6), a three-phase column hole (8) is arranged in the middle of the mounting seat (6), a second sealing ring (9) is clamped in the three-phase column hole (8), and a pressing plate (12) is fixedly connected to the outside of the partition section (4). The air pump motor sealing structure is simple and compact in structure, low in cost, can effectively realize the isolation of the stator cavity and the controller cavity and the sealing of the gap part after the installation of related components, completely limits the water vapor in the high-pressure gas in the stator cavity in the stator cavity, avoids the risk that the water vapor enters the controller cavity and affects the controller, and improves the overall safety and service life of the air compressor.

Description

Technical Field

[0001] This invention belongs to the field of air pump technology, and more specifically, relates to a sealing structure for an air pump motor. Background Technology

[0002] Air pumps require motors. Existing air pump motors directly connect the air inlet to the motor side for forced air cooling of the stator, effectively reducing motor temperature rise. However, the high-pressure gas inside the air pump inevitably enters the motor cavity, not only the stator cavity but also the controller cavity. This high-pressure gas contains moisture, which can corrode the controller inside the controller cavity. Controller corrosion can lead to motor malfunction, affecting performance and lifespan.

[0003] Existing technology includes a designation titled "A Self-Cooled Motor for an Air Pump," with publication number "213937602U." This technology relates to a self-cooled motor for an air pump, belonging to the field of electric motor technology. The motor housing has a front cover and a rear cover. The key feature is that the rear cover has an air nozzle connected to the inner cavity of the housing, and the front cover has a first vent hole penetrating through it. Because the rear cover has an air nozzle connected to the inner cavity of the housing, and the front cover has a first vent hole penetrating it, an airflow channel is formed between the air nozzle and the first vent hole, allowing air to enter and exit through this channel, carrying away the heat generated by the motor core and achieving self-cooling, thus extending the motor's service life. This technology does not address the technical problems or solutions of this application. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an air pump motor sealing structure that is simple and compact in structure, low in cost, and can effectively isolate the stator cavity and controller cavity and seal the gaps between related components after installation, so as to completely confine high-pressure gas in the stator cavity, thereby avoiding the risk of water vapor entering the controller and affecting the controller, and improving the overall safety and service life of the air compressor.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: This invention relates to a sealing structure for an air pump motor. The housing includes a stator cavity and a controller cavity. The stator cavity is connected to a high-pressure gas inlet and a high-pressure gas outlet. The interior of the stator cavity is under high pressure. A partition section is provided between the stator cavity and the controller cavity. A mounting hole is provided on the partition section. A mounting seat is fitted into the mounting hole. A first sealing ring is fitted onto the mounting seat. A three-phase column hole is provided in the middle of the mounting seat. A second sealing ring is fitted into the three-phase column hole. The three-phase columns of the motor stator extend through the three-phase column hole to the controller cavity. A pressure plate is fixedly connected to the outside of the partition section.

[0006] The mounting base has a first sealing ring groove on the outer ring near the dividing section, and a first sealing ring is fitted inside the first sealing ring groove.

[0007] When the mounting base is installed in the mounting base hole, the first sealing ring simultaneously contacts the inner wall of the side of the mounting base hole and the bottom boss of the mounting base hole.

[0008] The three-phase column hole is provided with a second sealing ring groove, and the second sealing ring is installed in the second sealing ring groove.

[0009] When the second sealing ring is installed in the three-phase column hole, the second sealing ring simultaneously contacts the inner wall of the side of the three-phase column hole and the bottom boss of the three-phase column hole.

[0010] The pressure plate has a protruding second sealing ring positioning ring on the side near the mounting base. When the pressure plate is fixedly installed on the outside of the partition section, the second sealing ring positioning ring is configured to extend into the three-phase column hole and press against the second sealing ring.

[0011] The bolts are screwed into the threaded holes on the partition section through the pressure plate.

[0012] The controller cavity is kept at normal pressure, and the controller is installed inside the controller cavity.

[0013] Both the first and second sealing rings are O-rings.

[0014] The three-phase column includes three copper columns, three three-phase column holes, one first sealing ring, and three second sealing rings.

[0015] The working principle and beneficial effects of the technical solution adopted in this invention are as follows: The air pump motor sealing structure of this invention includes a stator cavity and a controller cavity. The stator cavity houses the motor stator, and the controller cavity houses the controller. The stator cavity connects to a high-pressure gas inlet and outlet. When forced air cooling of the motor stator is required, high-pressure gas enters the stator cavity through the high-pressure gas inlet, effectively reducing motor temperature rise and increasing power density. During operation, the air pump motor continuously supplies high-pressure gas for forced air cooling. During this forced air cooling process, the stator cavity is under high pressure. Under this high pressure, without intervention, moisture from the high-pressure gas within the stator cavity will enter the controller cavity. Prolonged accumulation and corrosion of this moisture will damage the controller's components, leading to controller malfunctions and increasing the risk of motor failure. To address this, a partition section is installed between the stator cavity and the controller cavity. This partition section and the inner wall of the housing are integrally formed. Mounting holes are provided on the partition section, penetrating the partition. A mounting seat is fitted into the mounting hole, and a first sealing ring is fitted onto the mounting seat. The first sealing ring seals the connection between the mounting hole and the mounting seat. A three-phase column hole is provided in the middle of the mounting seat. The three-phase columns of the motor stator extend through this hole into the controller cavity, facilitating connection to the controller. A second sealing ring is fitted into this three-phase column hole, ensuring a reliable seal between the three-phase columns and the three-phase column hole. A pressure plate is fixedly connected to the outside of the partition section, pressing the mounting seat firmly to ensure reliable sealing by both the first and second sealing rings. This structural design results in a compact overall structure and achieves a reasonable and effective sealing method under different pressure levels in different cavities, improving safety and service life. Attached Figure Description

[0016] The following is a brief explanation of the contents depicted in the accompanying drawings and the markings therein: Figure 1 This is a schematic diagram of the air pump motor sealing structure described in this invention; Figure 2 This is a cross-sectional view of the air pump motor sealing structure described in this invention. Figure 3 This is a partial cross-sectional view of the air pump motor sealing structure described in this invention. The components in the attached diagram are labeled as follows: 1. Housing; 2. Stator cavity; 3. Controller cavity; 4. Separator section; 5. Mounting seat hole; 6. Mounting seat; 7. First sealing ring; 8. Three-phase column hole; 9. Second sealing ring; 10. Motor stator; 11. Three-phase column; 12. Pressure plate; 13. First sealing ring groove; 14. Inner wall of the side of the mounting seat hole; 15. Bottom boss of the mounting seat hole; 16. Second sealing ring groove; 17. Inner wall of the side of the three-phase column hole; 18. Bottom boss of the three-phase column hole; 19. Positioning ring of the second sealing ring; 20. Bolt; 21. Threaded hole; 22. Insert. Detailed Implementation

[0017] The following description, with reference to the accompanying drawings, provides a more detailed explanation of the specific embodiments of the present invention, including the shape and structure of each component, the relative positions and connections between the parts, the functions and working principles of each part: As attached Figure 1 -Appendix Figure 3As shown, this invention relates to a sealing structure for an air pump motor. The housing 1 includes a stator cavity 2 and a controller cavity 3. The stator cavity 2 connects to a high-pressure gas inlet and a high-pressure gas outlet, and the interior of the stator cavity 2 is under high pressure. A partition section 4 is provided between the stator cavity 2 and the controller cavity 3. A mounting hole 5 is provided on the partition section 4, and a mounting seat 6 is fitted into the mounting hole 5. A first sealing ring 7 is fitted onto the mounting seat 6. A three-phase column hole 8 is provided in the middle of the mounting seat 6, and a second sealing ring 9 is fitted into the three-phase column hole 8. The three-phase column 11 of the motor stator 10 extends through the three-phase column hole 8 to the controller cavity 3. A pressure plate 12 is fixedly connected to the outside of the partition section 4. The above structure addresses the shortcomings of the prior art: existing air pump motors directly open the air inlet to the motor side to force air cooling of the stator, effectively improving the motor temperature rise. However, the high-pressure gas inside the air pump will inevitably enter the motor cavity, not only the stator cavity but also the controller cavity. High-pressure gas contains moisture, which can corrode the controller inside the controller cavity. Corrosion of the controller can lead to motor failure, affecting performance and lifespan. Therefore, an improved technical solution is proposed. In the structural design, the housing 1 includes a stator cavity 2 and a controller cavity 3. The stator cavity 2 houses the motor stator 10, and the controller cavity 3 houses the controller. The stator cavity 2 connects to a high-pressure gas inlet and outlet. When forced air cooling of the motor stator 10 is required, high-pressure gas enters the stator cavity 2 through the high-pressure gas inlet, effectively reducing motor temperature rise and increasing power density. When the air pump motor is operating, it continuously supplies high-pressure gas for forced air cooling. During the forced air cooling process of the motor stator 10 inside the stator cavity 2, the interior of the stator cavity 2 is under high pressure. Under high pressure, if no measures are taken, the water vapor in the high-pressure gas inside the stator cavity 2 will enter the controller cavity 3. Over time, the accumulation and erosion of water vapor will corrode the relevant components of the controller, making the controller prone to failure, thereby increasing the risk of motor failure. To this end, a partition section 4 is provided between the stator cavity 2 and the controller cavity 3. The partition section 4 and the inner wall of the housing 1 are integral structures. A mounting hole 5 is provided on the partition section 4, and the mounting hole 5 passes through the partition section 4. A mounting seat 6 is fitted inside the mounting hole 5. A first sealing ring 7 is fitted on the mounting seat 6. The first sealing ring 7 seals the joint between the mounting hole 5 and the mounting seat 6. A three-phase column hole 8 is provided in the middle of the mounting seat 6. The three-phase column 11 of the motor stator 10 extends through the three-phase column hole 8 to the controller cavity 3, so that the three-phase column 11 extends into the controller cavity 3, which facilitates the connection of the controller. A second sealing ring 9 is fitted inside the three-phase column hole 8. The second sealing ring 9 provides a reliable seal at the joint between the three-phase column 11 and the three-phase column hole 8. A pressure plate 12 is fixedly connected to the outside of the partition section 4. The pressure plate 12 is fixedly connected to the partition section 4 to press the mounting seat 6, ensuring that the first sealing ring 7 and the second sealing ring 9 provide a reliable sealing effect.This achieves a reliable seal between the stator cavity 2 and the controller cavity 3. The compact structure allows for a reasonable and effective sealing method under different pressure levels in different cavities. The air pump motor sealing structure described in this invention is simple, compact, and low-cost. It effectively isolates the stator cavity and controller cavity and seals the gaps between related components after installation. This completely confines high-pressure gas within the stator cavity, thus preventing water vapor from entering the controller and affecting its operation, thereby improving the overall safety and service life of the air compressor.

[0018] A first sealing ring groove 13 is provided on the outer ring of the mounting base 6 near the dividing section 4, and a first sealing ring 7 is fitted inside the first sealing ring groove 13. In the above structure, the first sealing ring groove 13 is provided around the corner of the mounting base, and the cross-section of the first sealing ring groove 13 is L-shaped, which facilitates the fitting of the annular first sealing ring 7. After the mounting base is installed in place, the first sealing ring 7 is squeezed, and the first sealing ring 7 reliably contacts the inner wall 14 of the side of the mounting base hole and the bottom boss 15 of the mounting base hole, effectively achieving a seal on both sides and preventing moisture from passing through the mounting base hole 5. In this way, the first sealing ring 7 can effectively improve the sealing effect.

[0019] When the mounting base 6 is inserted into the mounting base hole 5, the first sealing ring 7 simultaneously contacts the inner wall 14 on the side of the mounting base hole and the bottom boss 15 of the mounting base hole. With this structure, one sealing ring can contact two surfaces simultaneously, achieving double sealing and effectively improving the sealing effect.

[0020] A second sealing ring groove 16 is provided inside the three-phase column hole 8, and a second sealing ring 9 is fitted into the second sealing ring groove 16. In the above structure, the second sealing ring groove 16 is arranged around the inside of the three-phase column hole 8, and the cross-section of the second sealing ring groove 16 is L-shaped, which facilitates the fitting of the annular second sealing ring 9. After the sealing plate is installed in place, the second sealing ring 9 is squeezed, and the second sealing ring 9 reliably contacts the inner wall 17 on the side of the three-phase column hole and the protrusion 18 at the bottom of the three-phase column hole, effectively achieving a seal on both sides and preventing moisture from entering the controller cavity through the three-phase column hole. The second sealing ring 9 can effectively improve the sealing effect and ensure the sealing performance.

[0021] When the second sealing ring 9 is fitted into the three-phase column hole 8, it simultaneously contacts the inner wall 17 on the side of the three-phase column hole and the bottom boss 18. This structure, with one sealing ring contacting two surfaces simultaneously, achieves double sealing, effectively improving the sealing effect.

[0022] The pressure plate 12 has a protruding second sealing ring positioning ring 19 on the side near the mounting base 6. When the pressure plate 12 is fixedly installed on the outside of the partition section 4, the second sealing ring positioning ring 19 is configured to extend into the three-phase column hole 8 and press against the second sealing ring 9.

[0023] Bolt 20 passes through pressure plate 12 and is screwed into threaded hole 21 on partition section 4. In the above structure, multiple bolts are provided, and each bolt passes through a through hole on the pressure plate and is screwed into a corresponding threaded hole. The pressure plate reliably presses the mounting seat and ensures sealing performance.

[0024] The controller cavity 3 is under normal pressure, and the controller is installed inside the controller cavity 3. In the above structure, the controller cavity and the stator cavity are completely isolated and unaffected, and are under normal pressure.

[0025] Both the first sealing ring 7 and the second sealing ring 9 are O-rings. The three-phase column 11 includes three copper columns, the three-phase column holes 8 include three, the first sealing ring 7 includes one, and the second sealing ring 9 includes three. In the above structure, the first sealing ring 7 reliably achieves the seal at the joint between the mounting base and the mounting base hole, and each second sealing ring 9 achieves the seal within one three-phase column hole.

[0026] The sealing plate is made of rubber and has an internal metal insert 21 to improve structural strength. During manufacturing, the insert is injection molded to form a complete sealing plate. Because the sealing plate requires bolted connection and needs to withstand the high pressure transmitted from the stator cavity through the mounting hole, it needs to have pressure-bearing capacity. Increasing the strength of the sealing plate can meet the pressure-bearing requirements. At the same time, the sealing plate is made of rubber, and the insert is sealed inside to improve strength and meet insulation requirements.

[0027] In summary, the air pump motor sealing structure of this invention, when structurally configured, includes a stator cavity 2 and a controller cavity 3 in the housing 1. The stator cavity 2 houses the motor stator 10, and the controller cavity 3 houses the controller. The stator cavity 2 connects to a high-pressure gas inlet and a high-pressure gas outlet. When forced air cooling of the motor stator 10 is required, high-pressure gas enters the stator cavity 2 through the high-pressure gas inlet, effectively reducing the motor temperature rise and increasing power density. During air pump motor operation, high-pressure gas is continuously supplied for forced air cooling. During the forced air cooling process of the motor stator 10 within the stator cavity 2, the interior of the stator cavity 2 is under high pressure. Under high pressure, if no measures are taken, moisture from the high-pressure gas in the stator cavity 2 will enter the controller cavity 3. Prolonged accumulation and corrosion of this moisture will corrode the relevant components of the controller, making it prone to failure and increasing the risk of motor malfunction. To this end, a partition section 4 is provided between the stator cavity 2 and the controller cavity 3. The partition section 4 and the inner wall of the housing 1 are integral structures. A mounting hole 5 is provided on the partition section 4, which passes through the partition section 4. A mounting seat 6 is fitted inside the mounting hole 5, and a first sealing ring 7 is fitted on the mounting seat 6. The first sealing ring 7 seals the joint between the mounting hole 5 and the mounting seat 6. A three-phase column hole 8 is provided in the middle of the mounting seat 6. The three-phase column 11 of the motor stator 10 extends through the three-phase column hole 8 to the controller cavity 3, allowing the three-phase column 11 to extend into the controller cavity 3 for easy connection to the controller. A second sealing ring 9 is fitted inside the three-phase column hole 8, providing a reliable seal between the three-phase column 11 and the three-phase column hole 8. A pressure plate 12 is fixedly connected to the outside of the partition section 4, and the pressure plate 12 is fixedly connected to the partition section 4 to press the mounting seat 6, ensuring that the first sealing ring 7 and the second sealing ring 9 provide a reliable seal. In this way, a reliable seal is achieved between the stator cavity 2 and the controller cavity 3. With its compact structure, it achieves a reasonable and effective sealing method under different pressure levels in different cavities.

[0028] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A sealing structure for an air pump motor, characterized in that: The housing (1) includes a stator cavity (2) and a controller cavity (3). The stator cavity (2) is connected to the high-pressure gas inlet and the high-pressure gas outlet. The stator cavity (2) is in a high-pressure state. A partition section (4) is provided between the stator cavity (2) and the controller cavity (3). A mounting hole (5) is provided on the partition section (4). A mounting seat (6) is installed in the mounting hole (5). A first sealing ring (7) is fitted on the mounting seat (6). A three-phase column hole (8) is provided in the middle of the mounting seat (6). A second sealing ring (9) is installed in the three-phase column hole (8). The three-phase column (11) of the motor stator (10) extends through the three-phase column hole (8) to the controller cavity (3). A pressure plate (12) is fixedly connected to the outside of the partition section (4).

2. The air pump motor sealing structure according to claim 1, characterized in that: The mounting base (6) is provided with a first sealing ring groove (13) on the outer ring near the partition section (4), and a first sealing ring (7) is fitted inside the first sealing ring groove (13).

3. The air pump motor sealing structure according to claim 1 or 2, characterized in that: When the mounting base (6) is inserted into the mounting base hole (5), the first sealing ring (7) simultaneously contacts the inner wall of the side of the mounting base hole (14) and the bottom boss of the mounting base hole (15).

4. The air pump motor sealing structure according to claim 1 or 2, characterized in that: The three-phase column hole (8) is provided with a second sealing ring groove (16), and a second sealing ring (9) is installed in the second sealing ring groove (16).

5. The air pump motor sealing structure according to claim 4, characterized in that: When the second sealing ring (9) is installed in the three-phase column hole (8), the second sealing ring (9) simultaneously contacts the inner wall part (17) on the side of the three-phase column hole and the bottom boss part (18) of the three-phase column hole.

6. The air pump motor sealing structure according to claim 1 or 2, characterized in that: The pressure plate (12) has a protruding second sealing ring positioning ring (19) on the side near the mounting base (6). When the pressure plate (12) is fixedly installed on the outside of the partition section (4), the second sealing ring positioning ring (19) is configured to extend into the three-phase column hole (8) and press against the second sealing ring (9).

7. The air pump motor sealing structure according to claim 1 or 2, characterized in that: The bolt (20) passes through the pressure plate (12) and is screwed into the threaded hole (21) on the partition section (4).

8. The air pump motor sealing structure according to claim 1 or 2, characterized in that: The controller cavity (3) is under normal pressure, and the controller is installed inside the controller cavity (3).

9. The air pump motor sealing structure according to claim 1 or 2, characterized in that: Both the first sealing ring (7) and the second sealing ring (9) are O-rings.

10. The air pump motor sealing structure according to claim 1 or 2, characterized in that: The three-phase column (11) includes three copper columns, the three-phase column hole (8) includes three, the first sealing ring (7) includes one, and the second sealing ring (9) includes three.

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