Dynamic pressure air bearing with high bearing capacity

Abstract

The invention discloses a dynamic pressure air bearing with high bearing capacity, and particularly relates to the technical field of bearings, the dynamic pressure air bearing comprises a bearing sleeve device, an inner rotor device and a bearing cover, and a detection cooling knot mechanism is arranged between the bearing sleeve device and the bearing cover; accurate monitoring and intelligent heat dissipation control of the rotating speed of the dynamic pressure air bearing are achieved through the detection cooling mechanism, the rotating period of a bearing cover can be accurately sensed by means of periodic meshing of a tooth block and a rack base and cooperation of a pressure sensor and a rheostat, and then the rotating speed of the device is accurately calculated through a central processing unit and a timer; real-time and accurate rotating speed information is provided for workers; when the rotating speed is judged to be too high, the condenser and the fan are automatically started, cold air is blown downwards in time to dissipate heat of the device, heat generated by high-speed rotation of the device is effectively reduced, stable performance of key parts of the bearing is guaranteed, and therefore the high bearing capacity and the operation stability of the device are remarkably improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of bearings, in particular to a dynamic pressure air bearing with high load capacity. BACKGROUND

[0002] A radial dynamic pressure air bearing, also known as an air dynamic pressure bearing or an air floating bearing, is a bearing that uses gas as a lubricant. Compared with traditional ball bearings, the radial dynamic pressure air bearing has the characteristics of no need for lubrication, high working speed, small mechanical loss and low maintenance cost. A general radial dynamic pressure air bearing at least comprises, from inside to outside, a top foil, a support assembly and a bearing sleeve. The support assembly can support the top foil in the bearing sleeve, and an inner rotor can be arranged in the top foil by an operator. In a working state, the inner rotor rotates in the top foil, and a dynamic pressure gas film formed by gas with kinetic energy can be formed between the outer peripheral wall of the inner rotor and the inner side surface of the top foil. The dynamic pressure gas film has a force on the inner rotor in the radial direction of the inner rotor to support the inner rotor.

[0003] According to the search of the publication No. CN214617486U, a radial dynamic pressure air bearing is disclosed, which comprises a bearing sleeve and at least one support assembly. The support assembly comprises a retainer arranged in the bearing sleeve and at least one elastic support arm. A distance is left between the retainer and the bearing sleeve. The support arm is arranged between the bearing sleeve and the retainer. The support arm is provided with at least two abutting portions for abutting against the inner wall of the bearing sleeve. Each abutting portion is circumferentially distributed around the retainer. A gap is left between the abutting portion and the retainer to enable the abutting portion to deform. When the dynamic pressure gas film is just formed, the support arm is more prone to deformation. When the dynamic pressure gas film is gradually formed, the support arm is gradually less prone to deformation. Therefore, the deformation degree of the support arm and the formation degree of the dynamic pressure gas film reach a dynamic balance, the support of the dynamic pressure gas film on the inner rotor is more uniform and stable, and a smaller take-off rotating speed is achieved.

[0004] In the above-mentioned patent, the dynamic pressure air bearing is a key high-precision mechanical component that supports and reduces friction in high-speed rotating equipment. Its high load 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 intense friction and relative movement inevitably occur between the internal components of the bearing. 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, which poses a severe challenge to the performance stability and high load capacity of the device. Therefore, we propose a dynamic pressure air bearing with high load capacity. SUMMARY

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

[0006] To achieve the above object, the present application provides the following technical scheme: a dynamic pressure air bearing with high bearing capacity, comprising a bearing sleeve device, an inner rotor device and a bearing cover, a detection cooling junction mechanism is arranged between the bearing sleeve device and the bearing cover; The detection cooling junction mechanism comprises a fixed seat mounted on the top of the bearing cover and a connecting seat mounted on the top of the bearing sleeve device, a tooth block is mounted on the top of the fixed seat, a guide plate is mounted in the connecting seat, a spring one is mounted on one side of the connecting seat, a rack seat is connected to the outside of the guide plate, a positioning tooth plate is arranged on the top of the rack seat, two symmetrical positioning assemblies are mounted on one side of the inside of the tooth block, a through slot is formed in the top of the connecting seat, a connecting plate is mounted on the top of the rack seat and located at the position of the through slot, a pressure sensor is mounted on one side of the inside of the through slot, a cold air tank is mounted on one side of the outside of the connecting seat, a condenser is arranged on one side of the inside of the cold air tank, and a fan is arranged on the bottom of the cold air tank.

[0007] Preferably, the tooth block is engaged with the teeth of the rack seat, the spring one is located outside the guide plate, and one end of the spring one is connected with the rack seat.

[0008] Preferably, a mounting seat is mounted on the top of the connecting seat, and two symmetrical supporting plates are mounted in the inside of the mounting seat.

[0009] Preferably, a terminal post and a metal rod are arranged between the two supporting plates, and a resistance wire is arranged on the outside of the terminal post.

[0010] Preferably, a sliding sheet is arranged on the outside of the metal rod, and the bottom of the sliding sheet is connected with the connecting plate.

[0011] Preferably, the positioning assembly comprises a connecting frame one mounted on one side of the inside of the connecting seat, and a connecting barrel is connected to the inside of the connecting frame one.

[0012] Preferably, an electromagnet is mounted on the inside top end of the connecting barrel, a spring two is mounted on the bottom of the electromagnet, and an iron rod is mounted on the bottom of the spring two.

[0013] Preferably, the iron rod is located in the inside of the connecting barrel, and a connecting frame two is mounted on the bottom of the iron rod.

[0014] Preferably, a positioning plate is mounted on the bottom end of the connecting frame two, and a limiting plate is mounted in the inside of the connecting frame one and located on one side of the connecting barrel.

[0015] The technical effects and advantages of the present application are as follows: The application realizes accurate monitoring and intelligent heat dissipation control of the rotating speed of the aerostatic bearing by detecting the cooling joint mechanism, utilizes the periodic meshing of the tooth block and the rack seat, cooperates with the pressure sensor and the variable resistor, can accurately perceive the rotating period of the bearing cover, and then accurately calculates the rotating speed of the device through the central processor and the timer, provides real-time and accurate rotating speed information for the staff; when it is judged that the rotating speed is too fast, the condenser and the fan are automatically started to blow cold air downward to dissipate heat of the device, effectively reduces the heat generated by high-speed rotation of the device, avoids a series of problems such as the decline of the air film bearing capacity caused by overheating, the additional stress deformation caused by the thermal expansion of the parts and the aging of the sealing material, and guarantees the performance stability of the key parts of the bearing, thereby significantly improving the high bearing capacity and operation stability of the device.

[0016] In use, the positioning assembly adopts an electromagnetic dynamic unlocking design, which takes into account the reliable locking and rapid resetting requirements at high speed; during the movement of the rack seat, the positioning plate is reliably positioned with the positioning tooth plate under the cooperation of the connecting frame 1, the connecting cylinder and the limiting plate, preventing the rack seat from rebounding and resetting under the elastic action of the spring 1, ensuring the accuracy and stability of each movement and guaranteeing the accuracy of the rotating speed detection; when the pressure sensor senses a pressing, the electromagnet is immediately powered on to drive the positioning plate to move upward through the iron rod, release the positioning of the rack seat, and make the rack seat quickly move to the initial position under the elastic restoring force of the spring 1, waiting for the next meshing with the tooth block to start a new periodical movement, so that the stable operation of the detection and cooling system is guaranteed, and the overall performance and reliability of the device are further improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic view of the overall structure of the application.

[0018] Figure 2 It is a rear view of the structure of the application.

[0019] Figure 3 It is a schematic view of the detection and cooling joint mechanism of the application.

[0020] Figure 4 It is an internal view of the detection and cooling joint mechanism of the application.

[0021] Figure 5 It is a semi-exploded view of the detection and cooling joint mechanism of the application.

[0022] Figure 6 It is a schematic view of the positioning assembly of the application.

[0023] Figure 7 It is an internal view of the positioning assembly of the application.

[0024] The reference signs are: 1, bearing sleeve device; 2, inner rotor device; 3, bearing cover; 4, detection cooling junction 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 post; 413, resistance wire; 414, metal rod; 415, sliding sheet; 416, connecting plate; 417, cold air tank; 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 DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] As shown in the accompanying drawings Figures 1-7 A dynamic pressure air bearing with high bearing capacity, comprising a bearing sleeve device 1, an inner rotor device 2, and a bearing cover 3, a detection cooling junction mechanism 4 is arranged between the bearing sleeve device 1 and the bearing cover 3; The detection cooling junction mechanism 4 comprises 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 tooth block 42 is mounted on the top of the fixed seat 41, a guide plate 44 is mounted in the connecting seat 43, a spring one 45 is mounted on one side of the connecting seat 43, a rack seat 46 is connected to the outside of the guide plate 44, a positioning tooth plate 47 is arranged on the top of the rack seat 46, two symmetrical positioning assemblies 48 are mounted on one side of the inside of the tooth block 42, a through slot 49 is formed on the top of the connecting seat 43, a connecting plate 416 is mounted on the top of the rack seat 46 at the position of the through slot 49, a pressure sensor 420 is mounted on one side of the inside of the through slot 49, a cold air tank 417 is mounted on one side of the outside of the connecting seat 43, a condenser 418 is arranged on one side of the inside of the cold air tank 417, and a fan 419 is arranged on the bottom of the cold air tank 417. The bearing cover 3 rotates to drive the fixed seat 41 and the top mounted tooth block 42 to rotate. The tooth block 42 rotates a period and is engaged with the rack seat 46. The rack seat 46 is provided with a plurality of tooth positions (such as 50 tooth positions). The tooth block 42 drives the rack seat 46 to move when the tooth block 42 is engaged with the rack seat 46. The rack seat 46 moves outside the guide plate 44 and presses the spring 45. The rack seat 46 is positioned by the positioning assembly 48 and the positioning tooth plate 47 every time the rack seat 46 moves, to prevent the spring 45 from returning to the original position. When the connecting plate 416 presses the pressure sensor 420, it represents that the rack seat 46 has completed a period of movement. The pressure sensor 420 is inducted by multiple pressing, and the resistor is set to change the flow. The signal is transmitted to the central processing unit and the timer is used to inform the staff whether the device rotates too fast or not. When the rotating speed is fast, the condenser 418 and the fan 419 are started, and the cold air blows down to cool the device. The tooth block 42 is engaged with the tooth position of the rack seat 46. The spring 45 is located outside the guide plate 44, and one end of the spring 45 is connected with the rack seat 46. The top of the connecting seat 43 is provided with a mounting seat 410. The inside of the mounting seat 410 is provided with two symmetrical supporting plates 411. The two supporting plates 411 are jointly provided with a connecting column 412 and a metal rod 414. The outside of the connecting column 412 is provided with a resistance wire 413. The outside of the metal rod 414 is provided with a sliding sheet 415. The bottom of the sliding sheet 415 is connected with a connecting plate 416. When the rack seat 46 moves, the sliding sheet 415 is driven by the connecting plate 416 to move. At this time, the sliding sheet 415 moves on the resistance wire 413, which is convenient for observing the rotating speed of the device. The positioning assembly 48 comprises a connecting frame 481 mounted on one side of the connecting seat 43. The inside of the connecting frame 481 is connected with a connecting cylinder 482. The inside of the connecting cylinder 482 is provided with an electromagnet 483 at the top. The bottom of the electromagnet 483 is provided with a spring 484. The bottom of the spring 484 is provided with an iron rod 485. The iron rod 485 is located in the connecting cylinder 482. The bottom of the iron rod 485 is provided with a connecting frame 486. The bottom of the connecting frame 486 is provided with a positioning plate 487. The inside of the connecting frame 481 and one side of the connecting cylinder 482 are provided with a limiting plate 488. When the rack seat 46 moves, the positioning plate 487 moves through the rotating connection of the connecting frame 481 and the connecting cylinder 482, and the limiting plate 488 limits the movement direction of the positioning plate 487 to prevent movement to the other side; when the pressure sensor 420 senses a press, the electromagnet 483 immediately starts to be powered on, and the positioning plate 487 is moved upward through the iron rod 485; at this time, the rack seat 46 is moved to the initial position through the setting of the spring 45; the positioning assembly 48 adopts dynamic unlocking of the electromagnet 483, and the requirements of reliable locking and fast resetting under high speed are considered.

[0027] The bearing sleeve device 1 is the existing structure in the publication number CN214617486U, which comprises a bearing sleeve, a blocking strip, a mounting position, an initial air guide opening, an outer sleeve ring, a blocking weir, an air guide groove, a concave surface, a support assembly, a support spring piece, a keel, a support arm, a contact part, a support part, a separation space, a retainer, a clamping piece, a slit part, a first slit, a second slit, an upstream end, a downstream end, a middle part, a top foil, a gas guide wedge surface, and a connection area.

[0028] When the inner rotor device 2 of the dynamic pressure air bearing drives the bearing cover 3 to rotate, the bearing cover 3 drives the fixed seat 41 fixed on the top of the bearing cover 3 and the tooth block 42 installed on the top of the fixed seat 41 to rotate together; after the tooth block 42 rotates one cycle, the tooth block 42 is engaged with the rack seat 46 installed on the outside of the guide plate 44 inside the connecting seat 43; after the tooth block 42 is engaged with the rack seat 46, the tooth block 42 drives the rack seat 46 to move along the guide plate 44 due to the rotation of the tooth block 42; in the movement process of the rack seat 46, the spring 45 installed on one side inside the connecting seat 43 is extruded to produce elastic deformation; the top of the rack seat 46 is provided with a positioning tooth plate 47, and the inside of the tooth block 42 is provided with two symmetrical positioning assemblies 48; in each movement of the rack seat 46, the positioning plate 487 in the positioning assembly 48 is positioned with the positioning tooth plate 47 through the cooperation of the connecting frame 481, the connecting cylinder 482 and the limiting plate 488, to prevent the rack seat 46 from rebounding to the original position under the elastic action of the spring 1; When the rack seat 46 moves, the positioning plate 487 moves, the limiting plate 488 limits its moving direction, and the rack seat 46 is positioned with the positioning tooth plate 47. The connecting plate 416 is installed at the top of the rack seat 46 and in the position of the through groove 49 opened at the top of the connecting seat 43. The pressure sensor 420 is installed inside one side of the through groove 49. When the rack seat 46 moves a certain distance and the connecting plate 416 presses the pressure sensor 420, it indicates that the rack seat 46 completes a period of movement. Through the induction of multiple pressures of the pressure sensor 420, combined with the rheostat (the flow change is composed of the terminal post 412, the resistance wire 413, the metal rod 414 and the sliding sheet 415), the signal is transmitted to the central processing unit, and the timer is used to inform the staff whether the rotating speed of the device is too fast or too slow. When the central processing unit judges that the rotating speed of the device is fast according to the received signal, the condenser 418 installed inside the cold air tank 417 on one side of the connecting seat 43 and the fan 419 at the bottom will be started. The condenser 418 works to produce cold air, and the fan 419 blows the cold air downward to cool the aerostatic bearing device, reduce the heat generated by high-speed rotation of the device, avoid performance degradation due to overheating, and thus improve the high load capacity of the device. When the pressure sensor 420 senses a press, the electromagnet 483 in the positioning assembly 48 is immediately powered to generate magnetic attraction to the iron rod 485. The iron rod 485 drives the positioning plate 487 to move upward to release the positioning of the rack seat 46. At this time, under the elastic recovery force of the spring one 45, the rack seat 46 is moved to the initial position, waiting for the next meshing with the tooth block 42 to start a new period of movement. This cycle ensures the stable operation of the device and improves the high load capacity.

[0029] Finally, it should be pointed out that in the description of the present application, it should be pointed out that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection. "Up", "down", "left", "right" and the like are only used to indicate the relative positional relationship, and when the absolute position of the described object changes, the relative positional relationship may change; Secondly: the drawings of the disclosed embodiments of the present application only involve the structures related to the disclosed embodiments of the present application, and other structures can refer to the usual design. In the case of no conflict, the same embodiment and different embodiments of the present application can be combined with each other; Finally: the above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A dynamic pressure air bearing with high load capacity, comprising a bearing sleeve device (1), an inner rotor device (2), a bearing cover (3), characterized in that: The bearing sleeve device (1) and the bearing cover (3) are jointly provided with a detection cooling junction mechanism (4); The detection cooling junction mechanism (4) respectively comprises 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), the top of the fixed seat (41) is provided with a tooth block (42), the inside of the connecting seat (43) is provided with a guide plate (44), one side of the inside of the connecting seat (43) is provided with a spring (45), the outside of the guide plate (44) is connected with a rack seat (46), the top of the rack seat (46) is provided with a positioning tooth plate (47), one side of the inside of the tooth block (42) is provided with two symmetrical positioning assemblies (48), the top of the connecting seat (43) is provided with a through slot (49), the top of the rack seat (46) and located at the position of the through slot (49) is provided with a connecting plate (416), one side of the inside of the through slot (49) is provided with a pressure sensor (420), one side of the outside of the connecting seat (43) is provided with a cold air tank (417), one side of the inside of the cold air tank (417) is provided with a condenser (418), the bottom of the cold air tank (417) is provided with a fan (419).

2. The dynamic pressure air bearing with high load capacity according to claim 1, characterized in that: The tooth block (42) is engaged 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 with the rack seat (46).

3. The dynamic pressure air bearing with high load capacity according to claim 1, characterized in that: The top of the connecting seat (43) is provided with a mounting seat (410), the inside of the mounting seat (410) is provided with two symmetrical supporting plates (411).

4. The dynamic pressure air bearing with high load capacity according to claim 3, characterized in that: The connecting seat (43) is provided with a connecting column (412) and a metal rod (414) between the two supporting plates (411), the outside of the connecting column (412) is provided with a resistance wire (413).

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

6. The dynamic pressure air bearing with high load capacity of claim 1, wherein: The positioning assembly (48) comprises a connecting frame (481) installed on one side of the inside of the connecting seat (43), and the inside of the connecting frame (481) is connected with a connecting barrel (482).

7. A dynamic pressure air bearing with high load capacity according to claim 6, characterized in that: The inside top end of the connecting barrel (482) is provided with an electromagnet (483), the bottom of the electromagnet (483) is provided with a spring (484), and the bottom of the spring (484) is provided with an iron rod (485).

8. The dynamic pressure air bearing with high load capacity according to claim 7, characterized in that: The iron rod (485) is located in the connecting barrel (482), and the bottom of the iron rod (485) is provided with a connecting frame (486).

9. A dynamic pressure air bearing with high load capacity according to claim 8, characterized in that: The bottom end of the connecting frame (486) is provided with a positioning plate (487), and the inside of the connecting frame (481) and located on one side of the connecting barrel (482) is provided with a limiting plate (488).

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