Aerodynamic bearing with high load capacity

Abstract

The application discloses a dynamic pressure air bearing with high bearing capacity, and particularly relates to the technical field of bearings, comprising a bearing sleeve device, an inner rotor device and a bearing cover, wherein the bearing sleeve device and the bearing cover are jointly provided with a detection cooling mechanism, the detection cooling mechanism is used for realizing accurate monitoring and intelligent heat dissipation control of the rotating speed of the dynamic pressure air bearing, the periodic meshing of the gear block and the rack seat is utilized, the pressure sensor and the variable resistor are used for accurately sensing the rotating period of the bearing cover, and then the central processing unit and the timer are used for accurately calculating the rotating speed of the device, so that real-time and accurate rotating speed information is provided for the staff; when the rotating speed is too fast, the condenser and the fan are automatically started, cold air is blown downwards in time to dissipate heat of the device, the heat generated by high-speed rotation of the device is effectively reduced, the performance stability of the key components of the bearing is ensured, and the high bearing capacity and the operation stability of the device are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of bearing technology, and more specifically, to a hydrodynamic air bearing with high load-bearing capacity. Background Technology

[0002] Radial hydrodynamic air bearings, also known as air dynamic bearings or air-bearing bearings, are a type of bearing that uses gas as a lubricant. Compared to traditional ball bearings, radial hydrodynamic air bearings have the advantages of requiring no lubrication, high operating speed, low mechanical loss, and low maintenance cost. Generally, a radial hydrodynamic air bearing includes at least a top foil, a support assembly, and a bearing sleeve arranged sequentially from the inside to the outside. The support assembly supports the top foil within the bearing sleeve, and the operator can place the inner rotor within the top foil. In operation, the inner rotor rotates within the top foil, and a hydrodynamic gas film formed by kinetic energy gas can be formed between the outer peripheral wall of the inner rotor and the inner surface of the top foil. The hydrodynamic gas film exerts a radial force on the inner rotor to support it.

[0003] A search revealed that CN214617486U discloses a radial dynamic pressure air bearing, comprising a bearing sleeve and at least one support assembly. The support assembly includes a cage disposed within the bearing sleeve and at least one elastic support arm. A distance is maintained between the cage and the bearing sleeve. The support arm is positioned between the bearing sleeve and the cage, and has at least two contact portions for abutting against the inner wall of the bearing sleeve. These contact portions are circumferentially distributed around the cage, with gaps between them to allow deformation. When the dynamic pressure air film is initially formed, the support arm deforms more easily; as the dynamic pressure air film gradually forms, the support arm becomes less prone to deformation. This achieves a dynamic balance between the degree of deformation of the support arm and the degree of formation of the dynamic pressure air film, resulting in more uniform and stable support of the inner rotor by the dynamic pressure air film and achieving a lower takeoff speed.

[0004] In the aforementioned patent, the hydrodynamic air bearing, as a key high-precision mechanical component, plays an important role in supporting and reducing friction in high-speed rotating equipment. Its high load-bearing capacity is crucial for ensuring the stable operation and efficient work of the equipment. However, during operation, the inner rotor device drives the bearing cover to rotate at high speed, and the various components inside the bearing inevitably generate intense friction and relative motion. This continuous mechanical action consumes a large amount of energy and releases it in the form of heat, causing the internal temperature of the bearing to rise rapidly. This poses a severe challenge to the performance stability and high load-bearing capacity of the device. Therefore, we propose a hydrodynamic air bearing with high load-bearing capacity. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a hydrodynamic air bearing with high load-bearing capacity to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a dynamic pressure air bearing with high load-bearing capacity, comprising a bearing sleeve assembly, an inner rotor assembly, and a bearing cover, wherein a detection and cooling mechanism is provided between the bearing sleeve assembly and the bearing cover.

[0007] The cooling detection mechanism includes a fixed seat mounted on the top of the bearing cover and a connecting seat on the top of the bearing sleeve assembly. A toothed block is mounted on the top of the fixed seat. A guide plate is installed inside the connecting seat. A spring is installed on one side of the inside of the connecting seat. A rack seat is connected to the outside of the guide plate. When the bearing cover drives the toothed block to rotate to a position relative to the teeth of the rack seat, the teeth of the toothed block mesh with the teeth of the rack seat, driving the rack seat to move along the guide plate. A positioning tooth plate is provided on the top of the rack seat. Two symmetrical positioning components are installed on one side of the inside of the connecting seat to prevent the rack seat from springing back under the action of the spring. A through slot is opened on the top of the connecting seat, and the top of the rack seat is located in the through slot. A connecting plate is installed at the location. A pressure sensor is installed on one side of the through slot. A cold air box is installed on the outside of the connecting seat. A condenser is installed on one side of the cold air box. A fan is installed at the bottom of the cold air box. The rack seat is installed inside the connecting seat through a guide plate and a spring. It can move linearly back and forth along the guide plate. When the bearing cover drives the toothed block to rotate to a position relative to the teeth of the rack seat, the teeth of the toothed block and the teeth of the rack seat mesh with each other, driving the rack seat to move along the guide plate. It is positioned by the positioning component and the positioning tooth plate set on the top of the rack seat, preventing the rack seat from rebounding and resetting under the elastic action of the spring. This ensures that the toothed block and the teeth of the rack seat mesh continuously and stably.

[0008] Preferably, the toothed block meshes with the teeth of the rack seat, the spring is located outside the guide plate, and one end of the spring is connected to the rack seat.

[0009] Preferably, a mounting base is installed on the top of the connecting base, and two symmetrical support plates are installed inside the mounting base.

[0010] Preferably, a terminal block and a metal rod are provided between the two support plates, and a resistance wire is provided on the outside of the terminal block.

[0011] Preferably, a sliding plate is provided on the outside of the metal rod, and the bottom of the sliding plate is connected to the connecting plate.

[0012] Preferably, the positioning component includes a connecting frame 1 installed inside one side of the connecting seat, and a connecting cylinder is connected inside the connecting frame 1.

[0013] Preferably, an electromagnet is installed at the top of the inside of the connecting cylinder, a second spring is installed at the bottom of the electromagnet, and an iron rod is installed at the bottom of the second spring.

[0014] Preferably, the iron rod is located inside the connecting cylinder, and a connecting bracket is installed at the bottom of the iron rod.

[0015] Preferably, a positioning plate is installed at the bottom of the second connecting frame, and a limit plate is installed inside the first connecting frame and on one side of the connecting cylinder.

[0016] The technical effects and advantages of this invention are as follows:

[0017] 1. In use, this invention achieves precise monitoring and intelligent heat dissipation control of the dynamic pressure air bearing speed through a detection and cooling mechanism. Utilizing the periodic meshing of the toothed block and rack seat, in conjunction with a pressure sensor and rheostat, the rotation cycle of the bearing cover can be accurately sensed. The central processing unit and timer then accurately calculate the device speed, providing real-time and accurate speed information to the operator. When the speed is determined to be too high, the condenser and fan are automatically activated to promptly blow cold air downwards to dissipate heat from the device. This effectively reduces the heat generated by the high-speed rotation of the device, avoiding a series of problems such as reduced air film load-bearing capacity, additional stress deformation caused by component thermal expansion, and aging of sealing materials due to overheating. This ensures the stable performance of key bearing components, thereby significantly improving the device's high load-bearing capacity and operational stability.

[0018] 2. In use, the positioning component of this invention adopts an electromagnet dynamic unlocking design, which takes into account both reliable locking and rapid reset requirements at high speeds. During the movement of the rack seat, the positioning plate, with the cooperation of the connecting frame, connecting cylinder, and limiting plate, reliably positions itself with the positioning tooth plate, preventing the rack seat from rebounding and resetting under the elastic force of the spring. This ensures the accuracy and stability of each movement and guarantees the precision of speed detection. When the pressure sensor senses a press, the electromagnet is immediately energized, driving the positioning plate upward through the iron rod, releasing the positioning of the rack seat. Under the elastic restoring force of the spring, the rack seat quickly moves to its initial position, waiting for the next engagement with the tooth block to begin a new cycle of movement. This cycle ensures the stable operation of the entire detection and cooling system, further improving the overall performance and reliability of the device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a rear view of the structure of the present invention.

[0021] Figure 3 This is a schematic diagram of the detection and cooling mechanism of the present invention.

[0022] Figure 4 This is an internal diagram of the detection and cooling mechanism of the present invention.

[0023] Figure 5 This is a semi-exploded view of the detection and cooling mechanism of the present invention.

[0024] Figure 6 This is a schematic diagram of the positioning component of the present invention.

[0025] Figure 7 This is an internal view of the positioning component of the present invention.

[0026] The attached figures are labeled as follows: 1. Bearing sleeve assembly; 2. Inner rotor assembly; 3. Bearing cover; 4. Detection and cooling mechanism; 41. Fixed seat; 42. Tooth block; 43. Connecting seat; 44. Guide plate; 45. Spring one; 46. Rack seat; 47. Positioning tooth plate; 48. Positioning assembly; 49. Through slot; 410. Mounting seat; 411. Support plate; 412. Terminal block; 413. Resistance wire; 414. Metal rod; 415. Sliding plate; 416. Connecting plate; 417. Cold air box; 418. Condenser; 419. Fan; 420. Pressure sensor; 481. Connecting frame one; 482. Connecting cylinder; 483. Electromagnet; 484. Spring two; 485. Iron rod; 486. Connecting frame two; 487. Positioning plate; 488. Limiting plate. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] As attached Figures 1-7 The diagram shows a dynamic pressure air bearing with high load-bearing capacity, including a bearing sleeve assembly 1, an inner rotor assembly 2, and a bearing cover 3. A detection and cooling mechanism 4 is provided between the bearing sleeve assembly 1 and the bearing cover 3.

[0029] The cooling detection mechanism 4 includes a fixed seat 41 mounted on the top of the bearing cover 3 and a connecting seat 43 mounted on the top of the bearing sleeve device 1. A toothed block 42 is mounted on the top of the fixed seat 41. A guide plate 44 is mounted inside the connecting seat 43. A spring 45 is mounted on one side inside the connecting seat 43. A rack seat 46 is connected to the outside of the guide plate 44. When the bearing cover 3 drives the toothed block 42 to rotate to a position relative to the teeth of the rack seat 46, the teeth of the toothed block 42 mesh with the teeth of the rack seat 46, driving the rack seat 46 to move along the guide plate 44. The top of the rack seat 46... The connecting seat 43 is equipped with a positioning toothed plate 47. Two symmetrical positioning components 48 are installed on one side of the inner side of the connecting seat 43. The positioning components 48 are used to prevent the rack seat 46 from rebounding under the action of the spring 45. A through groove 49 is opened on the top of the connecting seat 43. A connecting plate 416 is installed on the top of the rack seat 46 and at the position of the through groove 49. A pressure sensor 420 is installed on one side of the inner side of the through groove 49. A cold air box 417 is installed on the outer side of the connecting seat 43. A condenser 418 is provided on one side of the inner side of the cold air box 417. A fan 419 is provided at the bottom of the cold air box 417.

[0030] When the bearing cover 3 rotates, it drives the fixed seat 41 and the toothed block 42 mounted on the top to rotate. The toothed block 42 rotates for one cycle and then meshes with the rack seat 46. The rack seat 46 has several sets of teeth (e.g., 50 teeth). When the toothed block 42 meshes with the rack seat 46, it drives the rack seat 46 to move. The rack seat 46 moves outside the guide plate 44 and compresses the spring 45. When the rack seat 46 moves, it is positioned by the positioning component 48 and the positioning tooth plate 47 for each movement to prevent the spring 45 from rebounding and resetting. When the connecting plate 416 compresses the pressure sensor 420, it means that one cycle of the rack seat 46 has been completed. By sensing the pressure sensor 420 through multiple pressures and the change in flow rate set by the rheostat, the signal is transmitted to the central processing unit and used in conjunction with the timer to inform the operator whether the speed of the device is too fast or too slow. When the speed is too fast, the condenser 418 and the fan 419 are started, and the cold air is blown downward to dissipate heat from the device.

[0031] The toothed block 42 meshes with the teeth of the rack seat 46. The spring 45 is located outside the guide plate 44, and one end of the spring 45 is connected to the rack seat 46. The top of the connecting seat 43 is equipped with a mounting seat 410. Inside the mounting seat 410, two symmetrical support plates 411 are installed. A terminal 412 and a metal rod 414 are provided between the two support plates 411. A resistance wire 413 is provided outside the terminal 412. A slider 415 is provided outside the metal rod 414. The bottom of the slider 415 is connected to the connecting plate 416.

[0032] When the rack seat 46 moves, it drives the slider 415 to move through the connecting plate 416. At this time, the slider 415 moves on the resistance wire 413, which makes it easy to observe the rotation speed of the device.

[0033] The positioning assembly 48 includes a first connecting frame 481 installed inside one side of the connecting seat 43. A connecting cylinder 482 is connected inside the first connecting frame 481. An electromagnet 483 is installed at the top inside the connecting cylinder 482. A second spring 484 is installed at the bottom of the electromagnet 483. An iron rod 485 is installed at the bottom of the second spring 484. The iron rod 485 is located inside the connecting cylinder 482. A second connecting frame 486 is installed at the bottom of the iron rod 485. A positioning plate 487 is installed at the bottom end of the second connecting frame 486. A limit plate 488 is installed inside the first connecting frame 481 and on one side of the connecting cylinder 482.

[0034] Through the rotational connection of connecting bracket 481 and connecting cylinder 482, when rack seat 46 moves, positioning plate 487 moves, while limit plate 488 limits the movement direction of positioning plate 487 to prevent it from moving to the other side. When pressure sensor 420 senses a press, electromagnet 483 is immediately activated and energized, driving positioning plate 487 upward through iron rod 485. At this time, spring 45 moves rack seat 46 to the initial position. Positioning component 48 uses electromagnet 483 for dynamic unlocking, taking into account the requirements of reliable locking and rapid reset at high speed.

[0035] The bearing sleeve device 1 is an existing structure as disclosed in CN214617486U, which includes: a bearing sleeve, a retaining bar, a mounting position, an initial air inlet, an outer ring, a retaining dam, an air guide groove, a recessed surface, a support assembly, a support spring, a keel, a support arm, an abutment part, a support part, a partition space, a retainer, a clamping piece, a slit part, a first slit, a second slit, an upstream end, a downstream end, a midstream part, a top foil, an air guide wedge surface, and a connecting area; the specific implementation method will not be described in detail here.

[0036] Working principle of the invention: When the inner rotor device 2 of the dynamic pressure air bearing drives the bearing cover 3 to rotate, the bearing cover 3 will drive the fixed seat 41 fixed on its top and the toothed block 42 installed on the top of the fixed seat 41 to rotate together. After the toothed block 42 rotates for one cycle, it will mesh with the rack seat 46 installed on the outside of the guide plate 44 inside the connecting seat 43. After the toothed block 42 meshes with the rack seat 46, the rotation of the toothed block 42 will drive the rack seat 46 to move along the guide plate 44. During the movement of the rack seat 46... In the process, the spring 45 installed inside the connecting seat 43 will be squeezed, causing it to undergo elastic deformation; the top of the rack seat 46 is provided with a positioning tooth plate 47, and two symmetrical positioning components 48 are installed inside the tooth block 42. When the rack seat 46 moves each time, the positioning plate 487 in the positioning component 48 will be positioned with the positioning tooth plate 47 under the cooperation of the connecting frame 481, the connecting cylinder 482 and the limiting plate 488, to prevent the rack seat 46 from rebounding and resetting under the elastic action of the spring 45.

[0037] When the rack seat 46 moves, the positioning plate 487 moves, and the limiting plate 488 restricts its direction of movement, so that it cooperates with the positioning tooth plate 47 for positioning. A connecting plate 416 is installed on the top of the rack seat 46 and at the position of the through slot 49 opened on the top of the connecting seat 43. A pressure sensor 420 is installed on one side inside the through slot 49. When the rack seat 46 moves a certain distance, so that the connecting plate 416 squeezes the pressure sensor 420, it indicates that one cycle of the rack seat 46 has been completed. By sensing the pressure sensor 420 through multiple pressures, combined with the flow change of the rheostat (composed of terminal 412, resistance wire 413, metal rod 414, and slider 415), the signal is transmitted to the central processing unit and used in conjunction with the timer to inform the operator whether the speed of the device is too fast or too slow.

[0038] When the central processing unit determines that the device is rotating too fast based on the received signal, it will activate the condenser 418 inside the cold air box 417 on the outside of the connecting seat 43 and the fan 419 at the bottom. The condenser 418 generates cold air, and the fan 419 blows the cold air downwards to dissipate heat from the dynamic pressure air bearing device, reducing the heat generated by the device's high-speed rotation and preventing performance degradation due to overheating, thereby improving the device's high load-bearing capacity. When the pressure sensor 420 senses a press, the electromagnet 483 in the positioning component 48 is immediately energized, generating a magnetic attraction to the iron rod 485. The iron rod 485 drives the positioning plate 487 to move upward, releasing the positioning of the rack seat 46. At this time, under the elastic restoring force of the spring 45, the rack seat 46 is moved to the initial position, waiting for the next engagement with the toothed block 42 to start a new cycle of motion. This cycle ensures stable operation of the device and improves its high load-bearing capacity.

[0039] Finally, the following points should be noted: First, in the description of this invention, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can refer to mechanical connection or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the object being described changes, the relative positional relationship may change.

[0040] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0041] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hydrodynamic air bearing with high load-bearing capacity, comprising a bearing sleeve assembly (1), an inner rotor assembly (2), and a bearing cover (3), characterized in that: A detection and cooling mechanism (4) is provided between the bearing sleeve device (1) and the bearing cover (3). The detection cooling mechanism (4) includes a fixed seat (41) installed on the top of the bearing cover (3) and a connecting seat (43) on the top of the bearing sleeve device (1). A toothed block (42) is installed on the top of the fixed seat (41). A guide plate (44) is installed inside the connecting seat (43). A spring (45) is installed on one side inside the connecting seat (43). A rack seat (46) is connected to the outside of the guide plate (44). When the bearing cover (3) drives the toothed block (42) to rotate to a position relative to the teeth of the rack seat (46), the teeth of the toothed block (42) mesh with the teeth of the rack seat (46), driving the rack seat (46) to move along the guide plate (44). A positioning toothed plate (47) is provided on the top of the rack seat (46). A positioning toothed plate (47) is installed on one side inside the connecting seat (43). The device is equipped with two symmetrical positioning components (48). The positioning components (48) are used to prevent the rack seat (46) from rebounding under the action of spring one (45). The top of the connecting seat (43) is provided with a through groove (49). A connecting plate (416) is installed on the top of the rack seat (46) and at the position of the through groove (49). A pressure sensor (420) is installed on one side of the inside of the through groove (49). A cold air box (417) is installed on the outside of the connecting seat (43). A condenser (418) is provided on one side of the inside of the cold air box (417). A fan (419) is provided at the bottom of the cold air box (417). The rack seat (46) is installed inside the connecting seat (43) through a guide plate (44) and spring one (45) and can move linearly back and forth along the guide plate (44). When the bearing cover (3) drives the toothed block (42) to rotate to a position relative to the tooth of the rack seat (46), the teeth of the toothed block (42) mesh with the teeth of the rack seat (46), driving the rack seat (46) to move along the guide plate (44), and positioning it through the positioning component (48) and the positioning tooth plate (47) set on the top of the rack seat (46), preventing the rack seat (46) from rebounding and resetting under the elastic action of the spring (45), thereby ensuring that the toothed block (42) and the teeth of the rack seat (46) mesh continuously and stably.

2. The hydrodynamic air bearing with high load-bearing capacity according to claim 1, characterized in that: The toothed block (42) meshes with the teeth of the rack seat (46), and the spring (45) is located outside the guide plate (44), with one end of the spring (45) connected to the rack seat (46).

3. A hydrodynamic air bearing with high load-bearing capacity according to claim 1, characterized in that: The top of the connecting seat (43) is equipped with a mounting seat (410), and two symmetrical support plates (411) are installed inside the mounting seat (410).

4. A hydrodynamic air bearing with high load-bearing capacity according to claim 3, characterized in that: A terminal block (412) and a metal rod (414) are provided between the two support plates (411), and a resistance wire (413) is provided on the outside of the terminal block (412).

5. A hydrodynamic air bearing with high load-bearing capacity according to claim 4, characterized in that: The metal rod (414) is provided with a sliding piece (415) on its outside, and the bottom of the sliding piece (415) is connected to the connecting plate (416).

6. A hydrodynamic air bearing with high load-bearing capacity according to claim 1, characterized in that: The positioning component (48) includes a connecting frame (481) installed on one side inside the connecting seat (43), and a connecting cylinder (482) is connected inside the connecting frame (481).

7. A hydrodynamic air bearing with high load-bearing capacity according to claim 6, characterized in that: An electromagnet (483) is installed at the top of the inside of the connecting cylinder (482), a second spring (484) is installed at the bottom of the electromagnet (483), and an iron rod (485) is installed at the bottom of the second spring (484).

8. A hydrodynamic air bearing with high load-bearing capacity according to claim 7, characterized in that: The iron rod (485) is located inside the connecting cylinder (482), and a connecting frame (486) is installed at the bottom of the iron rod (485).

9. A hydrodynamic air bearing with high load-bearing capacity according to claim 8, characterized in that: A positioning plate (487) is installed at the bottom of the second connecting frame (486), and a limiting plate (488) is installed inside the first connecting frame (481) and on one side of the connecting cylinder (482).

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