Air bearing motor

Abstract

The utility model provides an air bearing motor which comprises a base and a rotating shaft, the inner wall of the base is provided with at least two air bearings, the rotating shaft is sleeved with thrust discs, the thrust discs are located on the inner sides of the air bearings, a small gap exists between the thrust discs and the air bearings, the air bearings and the thrust discs are used in cooperation, and the number of the air bearings and the number of the thrust discs are at least two. And the matching surface of at least one air bearing and the thrust disc is a conical surface. According to the utility model, the matching surface of the at least one air bearing and the thrust disc is arranged to be the conical surface, so that axial movement and radial movement of the rotating shaft can be avoided, a radial bearing and an axial bearing are replaced, the number of the bearings is reduced, the structure of the motor is more compact, and the production cost can be reduced at the same time; besides, the conical matching surface can generate air flow during working, so that the active heat dissipation capability of the motor is enhanced, the heat dissipation effect is improved, the working efficiency of the motor is improved, and the service life of the motor is prolonged; belongs to the technical field of motors.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to an air bearing motor. Background Technology

[0002] An air bearing motor is a type of motor that uses air bearings as a key component. Air bearings, also known as air buoyancy bearings, are sliding bearings that use gas (usually air, but other gases may also be used) as a lubricant. They utilize a very thin gas film formed between the bearing and the shaft, separating them and achieving non-contact operation. Due to the presence of this gas film, friction between the bearing and the shaft is greatly reduced, energy loss is minimized, and no lubricating oil or grease is required, reducing maintenance costs and causing no environmental pollution. Currently, air bearing motors are widely used in industrial automation, precision machinery, semiconductor manufacturing, flat panel displays, and aerospace.

[0003] In heavy-load, high-speed, or high-precision applications, air bearing motors typically require multiple axial and radial bearings to prevent axial and radial movement of the shaft during operation. However, multiple bearings occupy significant space, increasing the motor's size. Furthermore, multiple bearings increase production and maintenance costs. Moreover, the simultaneous operation of multiple bearings generates substantial heat; due to the motor's weak active cooling capacity, high temperatures not only reduce efficiency but also shorten its lifespan. Therefore, a new type of air bearing motor needs to be designed. Utility Model Content

[0004] The purpose of this application is to provide an air bearing motor that addresses the technical problems of existing air bearing motors, such as large size, high cost, poor heat dissipation, and short service life.

[0005] This application provides an air bearing motor, including a base and a shaft. An air bearing is provided on the inner wall of the base, and a thrust plate is sleeved on the shaft. The thrust plate is located inside the air bearing and there is a small gap between them. The air bearing and the thrust plate are used in conjunction. There are at least two air bearings and thrust plates, and at least one of the mating surfaces of the air bearing and the thrust plate is a conical surface.

[0006] In one embodiment, both the air bearing and the thrust disk are arranged in annular shape.

[0007] In one embodiment, the mating surfaces of the air bearing and at least one of the thrust discs are provided with a wear-resistant coating.

[0008] In one embodiment, the wear-resistant coating comprises a polytetrafluoroethylene coating or a molybdenum disulfide layer.

[0009] In one embodiment, the system further includes a stator and a rotor, with the stator disposed on the inner wall of the base and the rotor disposed on the rotating shaft, the rotor being fitted and installed inside the stator.

[0010] In one embodiment, the base is provided with a terminal block, which is connected to the stator.

[0011] In one embodiment, the machine base is further provided with end caps at both ends, and the rotating shaft is rotatably connected to the end caps via the air bearing and the thrust plate.

[0012] In one embodiment, the base or the end cover is provided with ventilation holes.

[0013] In one embodiment, the bottom of the base is provided with a plurality of symmetrically arranged fixing feet.

[0014] This invention provides an air bearing motor. Compared with existing technologies, its advantages are as follows: By setting the mating surface between at least one air bearing and the thrust plate as a conical surface, axial and radial movement of the shaft can be avoided. Replacing radial and axial bearings reduces the number of bearings, making the motor structure more compact and reducing production costs. Furthermore, the conical mating surface generates airflow during operation, carrying away internal heat and enhancing the motor's active heat dissipation capacity. This improves heat dissipation, thereby increasing motor efficiency and extending its service life. This invention features a compact structure, small size, low production cost, strong active heat dissipation capacity, improved reliability and safety, increased efficiency, extended service life, reduced operating noise, and high practicality. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A cross-sectional structural schematic diagram of an air bearing motor provided in Embodiment 1 of this application;

[0017] Figure 2 for Figure 1 The diagram shown is a left-side view of the air bearing motor.

[0018] Figure 3 This is a cross-sectional structural diagram of an air bearing motor provided in Embodiment 2 of this application;

[0019] Figure 4 This is a cross-sectional structural diagram of an air bearing motor provided in Embodiment 3 of this application;

[0020] Figure 5 This is a cross-sectional structural diagram of an air bearing motor provided in Embodiment 4 of this application.

[0021] Explanation of symbols in the diagram:

[0022] 1. Frame; 2. Shaft; 3. Stator; 4. Rotor; 5. Air bearing; 6. Thrust plate; 7. End cover; 8. Terminal; 9. Fixing foot. Detailed Implementation

[0023] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0024] It should be noted that when a component is referred to as being "fixed" or "set" to another component, it can be directly or indirectly attached to that other component. When a component is referred to as being "connected" to another component, it can be directly or indirectly connected to that other component.

[0025] It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and should not be construed as indicating or implying 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 on this application. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Example 1

[0027] Please see Figure 1 This is a cross-sectional structural diagram of an air bearing motor provided in Embodiment 1 of this application. For ease of explanation, only the parts relevant to this embodiment are shown, which are described in detail below:

[0028] Please combine Figure 2An air bearing motor includes a base 1 and a rotating shaft 2. An air bearing 5 is mounted on the inner wall of the base 1. A thrust plate 6 is sleeved on the rotating shaft 2, located inside the air bearing 5 with a small gap between them. The air bearing 5 and the thrust plate 6 work together. There are at least two air bearings 5 ​​and thrust plates 6, and at least one of the mating surfaces of the air bearing 5 and the thrust plate 6 is a conical surface. When the motor is running, the rotating shaft 2 rotates, and the air bearing 5 and the thrust plate 6 work together to support the rotating shaft 2 through an air film. Simultaneously, because the mating surface of the air bearing 5 and the thrust plate 6 is conical, airflow is generated at the conical surface, carrying away heat from inside the motor and achieving active heat dissipation.

[0029] By setting the mating surface between at least one air bearing 5 and the thrust plate 6 as a conical surface, axial and radial movement of the rotating shaft 2 can be avoided. Replacing radial and axial bearings reduces the number of bearings, making the motor structure more compact and reducing production costs. In addition, the conical mating surface generates airflow during operation, carrying away heat from the inside of the motor, enhancing the motor's active heat dissipation capacity, improving the heat dissipation effect, thereby improving the motor's working efficiency and extending its service life.

[0030] For details, please refer to Figure 1 Both the air bearing 5 and the thrust plate 6 are arranged in annular shape. The annular design allows the airflow to pass more evenly through the tiny gap between the air bearing 5 and the thrust plate 6, thereby improving the stability of the air film and helping to reduce friction and wear caused by uneven airflow.

[0031] Please see Figure 1 In this embodiment, the air bearing 5 is configured as a conical disc, and the thrust plate 6 is configured as a cone. There are two air bearings 5 ​​and two thrust plates 6, forming two sets of bearings. The two sets of bearings are symmetrically arranged, which improves the stability of motor operation.

[0032] Please see Figure 1 At least one of the mating surfaces of the air bearing 5 and the thrust disk 6 is provided with a wear-resistant coating (not shown in the figure). The wear-resistant coating is used to reduce the wear rate of the mating surfaces of the air bearing 5 and the thrust disk 6 during the friction process, thereby extending their service life. In addition, the wear-resistant coating can also improve the lubricity of the mating surfaces of the air bearing 5 and the thrust disk 6, reduce the coefficient of friction, and reduce energy consumption. Furthermore, the wear-resistant coating can also improve the corrosion resistance of the air bearing 5 and the thrust disk 6, enabling them to maintain the integrity of their mating surfaces in harsh environments and extend their service life.

[0033] Please see Figure 1 In this embodiment, wear-resistant coatings are provided on the mating surfaces of the air bearing 5 and the thrust disk 6 to reduce the wear rate, improve the lubrication of the mating surfaces, improve corrosion resistance, and extend service life.

[0034] Please see Figure 1 Wear-resistant coatings include polytetrafluoroethylene (PTFE) coatings or molybdenum disulfide (MoD) coatings. Wear-resistant coatings can also be made of other materials, as long as they possess anti-wear, lubricating, and corrosion-resistant properties.

[0035] Please see Figure 1 The motor also includes a stator 3 and a rotor 4. The stator 3 is mounted on the inner wall of the base 1, and the rotor 4 is mounted on the shaft 2. The rotor 4 is fitted inside the stator 3. The base 1 has a terminal block 8, which is connected to the stator 3. It also includes end covers 7, which are located at both ends of the base 1. The shaft 2 is rotatably connected to the end covers 7 via an air bearing 5 and a thrust plate 6. The stator 3, rotor 4, end covers 7, and terminal blocks 8 are all basic components of the motor, ensuring its normal operation. When the terminal blocks 8 are connected to an external power source, the electromagnetic coil on the stator 3 is energized, generating a rotating magnetic field. This rotating magnetic field acts on the rotor 4, inducing a current. The induced current experiences a force in the magnetic field, causing the rotor 4 to rotate. The rotation of the rotor 4 drives the rotation of the shaft 2, thus operating the load.

[0036] Please see Figure 1 Ventilation holes (not shown in the figure) are provided on the base 1 or end cover 7. The airflow generated at the conical surface dissipates the heat inside the motor through the ventilation holes, thereby reducing the motor temperature and improving the stability and safety of the motor operation.

[0037] Please see Figure 1 The bottom of the base 1 is provided with several symmetrically arranged fixed feet 9, which serve as supports.

[0038] The following combination Figures 1-2 The working process of an air bearing motor according to Embodiment 1 is described as follows:

[0039] In operation, the terminal 8 is connected to an external power source. The electromagnetic coil on the stator 3 is energized, generating a rotating magnetic field. This field induces a current in the rotor 4, which in turn causes the rotor 4 to rotate. The rotation of the rotor 4 drives the rotation of the shaft 2, thus supporting the load. During the rotation of the shaft 2, an air film is generated between the air bearing 5 and the thrust plate 6. This air film provides stable and low-friction support for the shaft 2, ensuring stability even at high speeds. Simultaneously, the tapered mating surface of the thrust plate 6 and the air bearing 5 replaces both radial and axial bearings, preventing axial and radial movement of the shaft 2. This reduces the number of bearings, making the motor more compact and lowering production costs. Furthermore, the tapered mating surface allows airflow, carrying away internal heat and enhancing the motor's active cooling capacity and overall heat dissipation.

[0040] Example 2

[0041] Please see Figure 3 This is a cross-sectional structural diagram of an air bearing motor provided in Embodiment 2 of this application. For ease of explanation, only the parts relevant to this embodiment are shown, which are described in detail below:

[0042] Compared with Embodiment 1, the difference in this embodiment is that: in this embodiment, there are two air bearings 5 ​​and two thrust disks 6, forming two sets of bearings. In one set of bearings, the air bearing 5 is set in a conical disc shape, and the thrust disk 6 is set in a conical shape, with their mating surface being a conical surface. In the other set of bearings, both the air bearing 5 and the thrust disk 6 are set in a disc shape, with their mating surface being a plane. Both sets of bearings are set on the same side of the rotor 4, and a common radial bearing is set on the other side of the rotor 4. It can be a deep groove ball bearing or a cylindrical roller bearing. The bearings on the left and right sides of the rotor 4 are asymmetrically arranged.

[0043] In this embodiment, the structure and shape of the base 1, rotating shaft 2, stator 3, rotor 4, end cover 7, wiring head 8, and fixing foot 9 are the same as in embodiment one, and will not be described again here.

[0044] Compared to Embodiment 1, the bearings on the left and right sides of the rotor 4 in this embodiment are asymmetrically arranged, making the motor more flexible in structure and able to adapt to different working conditions. At the same time, the asymmetrically arranged bearings can provide balanced support in different directions, thereby significantly improving the overall stability of the motor.

[0045] Example 3

[0046] Please see Figure 4 This is a cross-sectional structural diagram of an air bearing motor provided in Embodiment 3 of this application. For ease of explanation, only the parts relevant to this embodiment are shown, which are described in detail below:

[0047] Compared with Embodiment 1, the difference in this embodiment is that: in this embodiment, the air bearing 5 is configured as a double conical disc, the thrust disc 6 is configured as a double conical disc, and there are two air bearings 5 ​​and two thrust discs 6, forming two sets of bearings, and the two sets of bearings are symmetrically arranged, which improves the stability of motor operation.

[0048] In this embodiment, the structure and shape of the base 1, rotating shaft 2, stator 3, rotor 4, end cover 7, wiring head 8, and fixing foot 9 are the same as in embodiment one, and will not be described again here.

[0049] Compared to Embodiment 1, this embodiment sets the air bearing 5 in a double-conical disc shape and the thrust disc 6 in a double-conical shape. This shape can provide more stable and uniform support force. Especially when running at high speed, it can avoid axial and radial movement of the shaft 2 to a greater extent, significantly improve the overall stability of the motor, and make the motor run more smoothly.

[0050] Example 4

[0051] Please see Figure 5 This is a cross-sectional structural diagram of an air bearing motor provided in Embodiment 4 of this application. For ease of explanation, only the parts relevant to this embodiment are shown, which are described in detail below:

[0052] Compared with Embodiment 3, the difference in this embodiment is that: in this embodiment, there are two air bearings 5 ​​and two thrust disks 6, forming two sets of bearings. In one set of bearings, the air bearing 5 is set in a double-conical disc shape, and the thrust disk 6 is set in a double-conical shape, with a conical mating surface. In the other set of bearings, both the air bearing 5 and the thrust disk 6 are set in a disc shape, with a flat mating surface. Both sets of bearings are set on the same side of the rotor 4, and a common radial bearing, which can be a deep groove ball bearing or a cylindrical roller bearing, is set on the other side of the rotor 4. The bearings on the left and right sides of the rotor 4 are asymmetrically arranged.

[0053] In this embodiment, the structure and shape of the base 1, shaft 2, stator 3, rotor 4, end cover 7, connector 8, and fixing foot 9 are the same as in embodiment 3, and will not be described again here.

[0054] Compared to Embodiment 3, the bearings on the left and right sides of the rotor 4 in this embodiment are asymmetrically arranged, making the motor more flexible in structure and able to adapt to different working conditions. At the same time, the asymmetrically arranged bearings can provide balanced support in different directions, thereby significantly improving the overall stability of the motor.

[0055] It is worth noting that the shapes of the air bearing 5 and the thrust disk 6 are not limited. They can be the shapes in Embodiments 1 to 4, or other shapes besides Embodiments 1 to 4, as long as at least one mating surface between the air bearing 5 and the thrust disk 6 is a conical surface. The specific shape depends on the specific working conditions.

[0056] In summary, this utility model provides an air bearing motor. By setting the mating surface between at least one air bearing and the thrust plate to a conical surface, axial and radial movement of the shaft can be avoided. Replacing radial and axial bearings reduces the number of bearings, making the motor structure more compact and reducing production costs. Furthermore, the conical mating surface generates airflow during operation, carrying away internal heat and enhancing the motor's active heat dissipation capacity. This improves heat dissipation, thereby increasing motor efficiency and extending its service life. This utility model features a compact structure, small size, low production cost, strong active heat dissipation capacity, improved reliability and safety, increased efficiency, extended service life, and reduced operating noise. It is highly practical and can be widely applied in the field of motor technology.

[0057] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An air bearing motor, comprising a base (1) and a rotating shaft (2), characterized in that, An air bearing (5) is provided on the inner wall of the base (1), and a thrust disk (6) is sleeved on the rotating shaft (2). The thrust disk (6) is located inside the air bearing (5) and there is a small gap between them. The air bearing (5) and the thrust disk (6) are used in conjunction. The number of air bearings (5) and thrust disks (6) is at least two, and at least one of the mating surfaces of the air bearing (5) and the thrust disk (6) is a conical surface.

2. The air bearing motor as described in claim 1, characterized in that, Both the air bearing (5) and the thrust disk (6) are arranged in annular shape.

3. The air bearing motor as described in claim 1, characterized in that, At least one of the air bearing (5) and the thrust plate (6) has a wear-resistant coating on its mating surface.

4. The air bearing motor as described in claim 3, characterized in that, The wear-resistant coating includes a polytetrafluoroethylene coating or a molybdenum disulfide layer.

5. The air bearing motor as described in claim 1, characterized in that, It also includes a stator (3) and a rotor (4). The stator (3) is disposed on the inner wall of the base (1), and the rotor (4) is disposed on the rotating shaft (2). The rotor (4) is fitted inside the stator (3).

6. The air bearing motor as described in claim 5, characterized in that, The base (1) is provided with a connector (8), which is connected to the stator (3).

7. The air bearing motor as described in claim 1, characterized in that, It also includes end caps (7), which are provided at both ends of the base (1). The rotating shaft (2) is rotatably connected to the end caps (7) through the air bearing (5) and the thrust disk (6).

8. The air bearing motor as described in claim 7, characterized in that, Ventilation holes are provided on the base (1) or the end cover (7).

9. The air bearing motor as described in claim 1, characterized in that, The bottom of the base (1) is provided with several symmetrically arranged fixed feet (9).

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