Static and dynamic mixed air bearing rotor system

Abstract

The utility model discloses a static and dynamic mixed air bearing rotor system which comprises a motor, a rotor is installed at the output end of the motor, a bearing sleeve is fixed to one side of the motor, and an air bearing is installed in the bearing sleeve. The air bearing comprises a bearing body mounted on the inner side of the bearing sleeve, a plurality of air supply channels and air cavities are formed in the outer circumferential wall and the inner circumferential wall of the bearing body correspondingly, and a plurality of vent holes are formed between the air supply channels and the air cavities in a penetrating mode; an air supply mechanism is mounted on the motor and used for feeding air into the air supply channel; the air supply mechanism comprises an air storage tank and an air pump, the air storage tank and the air pump are fixed on the motor, and an air outlet of the air pump is connected with the air storage tank through a first air outlet pipe. And friction is generated between the shaft and the shaft sleeve, and abrasion is caused.

Description

Technical Field

[0001] The utility model relates to the technical field of air floating bearings, in particular to a static-dynamic hybrid air floating bearing rotor system. Background Art

[0002] Hydrostatic air bearings have the advantages of no wear and good rigidity, but they need to continuously provide pressurized gas to maintain buoyancy and frictionless rotation. Since the system that provides pressurized gas often cannot move with the rotor, this limits the use of hydrostatic air bearings to fixed equipment in workshops and laboratories, such as the combined hydrostatic air bearing support mechanism disclosed in patent CN109765002B.

[0003] However, static pressure air bearings have many defects during use. Compared with static pressure air bearings, dynamic pressure bearings do not require a system to provide pressurized air during use. They can generate dynamic pressure when the shaft rotates, so that the rotor can remain floating without friction when rotating at high speed. However, the existing dynamic pressure bearings cannot generate enough dynamic pressure gas due to the slow speed at startup and before stopping, so friction occurs between the shaft and the sleeve, causing wear. For this reason, we propose a static-dynamic hybrid air bearing rotor system. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a static-dynamic hybrid air-floating bearing rotor system, which solves the problem that the existing hydrodynamic bearing cannot generate sufficient hydrodynamic pressure gas due to its slow rotation speed during startup and before shutdown, causing friction between the shaft and the sleeve and causing wear.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a static-dynamic hybrid air-floating bearing rotor system, comprising a motor, a rotor is installed at the output end of the motor, a bearing sleeve is fixed on one side of the motor, and an air-floating bearing is installed in the bearing sleeve;

[0006] The air bearing comprises a bearing body installed inside the bearing sleeve, the outer peripheral wall and the inner peripheral wall of the bearing body are respectively provided with a plurality of air supply channels and air cavities, and a plurality of air holes are provided between the air supply channels and the air cavities;

[0007] The motor is provided with an air supply mechanism for taking air into the air supply channel;

[0008] The air supply mechanism includes an air tank and an air pump fixed on the motor, the air pump outlet is connected to the air tank through a first air outlet pipe, the air tank outlet is connected to a second air outlet pipe extending to the inner cavity of the air supply channel, the first air outlet pipe is installed with a first automatic control valve, and the second air outlet pipe is installed with a second automatic control valve;

[0009] A single chip microcomputer controller is fixed on the motor and is used for controlling the first automatic control valve and the second automatic control valve.

[0010] Preferably, both end surfaces of the bearing body are flat surfaces, so as to reduce gas leakage in the air supply channel.

[0011] Preferably, the plurality of air supply channels and air cavities are equiangularly distributed on the outer circumference and inner circumference of the bearing body, and the air supply channels and air cavities exist in pairs.

[0012] Preferably, a sensor assembly is installed on the rotor, and the sensor assembly includes a speed sensor and a vibration sensor. The signal output ends of the speed sensor and the vibration sensor are respectively connected to the signal input end of the single-chip controller, and the speed sensor and the vibration sensor are used to detect the speed and vibration frequency of the rotor.

[0013] Preferably, the signal input ends of the first automatic control valve and the second automatic control valve are respectively connected to the control end of the single chip controller.

[0014] Preferably, a pressure gauge is also installed on the gas storage tank for detecting the air pressure in the gas storage tank.

[0015] Beneficial Effects

[0016] The utility model provides a static-dynamic hybrid air-floating bearing rotor system. Compared with the prior art, it has the following beneficial effects:

[0017] 1. The static-dynamic hybrid air bearing rotor system enables the rotor to float by the air bearing by pumping air into the air bearing during the stable period of high-speed rotation. In this way, there is no friction from the beginning to the end when the rotor rotates, which greatly reduces wear and extends the service life of the rotor.

[0018] 2. The static-dynamic hybrid air-floating bearing rotor system is provided with an air supply mechanism, which includes an air tank, an air pump, etc. The air pump can continuously supply air to the air tank, and the air tank is used to supply air to the rotor, thereby ensuring that the compressed gas is sufficient for use. There is no need to rely on a fixed high-pressure air system, so that the use of air-floating bearings can be expanded to mobile machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model from the first viewing angle;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model from a second viewing angle;

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the utility model from a third viewing angle;

[0022] Figure 4 It is a schematic diagram of the structure of the partially cut-off middle section of the air bearing of the utility model.

[0023] In the figure: 1. motor; 2. rotor; 3. bearing sleeve; 4. air bearing; 41. bearing body; 42. air supply channel; 43. air cavity; 44. air vent; 5. sensor assembly; 51. speed sensor; 52. vibration sensor; 6. single-chip microcomputer controller; 7. air supply mechanism; 71. air storage tank; 72. air pump; 73. first air outlet pipe; 74. second air outlet pipe; 75. first automatic control valve; 76. second automatic control valve; 77. barometer. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-4 , the utility model provides two technical solutions:

[0026] Embodiment 1:

[0027] The static-dynamic hybrid air-floating bearing rotor system comprises a motor 1, a rotor 2 is installed at the output end of the motor 1, a bearing sleeve 3 is fixed to one side of the motor 1, and an air-floating bearing 4 is installed in the bearing sleeve 3;

[0028] The air bearing 4 includes a bearing body 41 installed inside the bearing sleeve 3. The outer peripheral wall and the inner peripheral wall of the bearing body 41 are respectively provided with a plurality of air supply channels 42 and air cavities 43. A plurality of air holes 44 are provided between the air supply channels 42 and the air cavities 43.

[0029] The motor 1 is provided with an air supply mechanism 7 for supplying air into the air supply channel 42;

[0030] The air supply mechanism 7 includes an air tank 71 and an air pump 72 fixed to the motor 1. The air outlet of the air pump 72 is connected to the air tank 71 through a first air outlet pipe 73. The air outlet of the air tank 71 is connected to a second air outlet pipe 74 extending to the inner cavity of the air supply channel 42. A first automatic control valve 75 is installed on the first air outlet pipe 73, and a second automatic control valve 76 is installed on the second air outlet pipe 74.

[0031] A single chip microcomputer controller 6 is fixed on the motor 1 for controlling the first automatic control valve 75 and the second automatic control valve 76 .

[0032] Embodiment 2:

[0033] The main difference from the first embodiment is:

[0034] The static-dynamic hybrid air-floating bearing rotor system has two flat surfaces at both ends of the bearing body 41, which is used to reduce gas leakage in the air supply channel 42; multiple air supply channels 42 and air cavities 43 are respectively distributed at equal angles on the outer and inner circumferences of the bearing body 41, and the air supply channels 42 and air cavities 43 exist in pairs. The second automatic control valve 76 is opened, and the compressed gas in the air tank 71 enters the inner side of the air supply channel 42 through the second air outlet pipe 74, and reaches the inner side of the air cavity 43 through the air vent 44 to float the rotor 2, and the rotor 2 is accelerated to rotate without contact, so that the rotor 2 has no friction from beginning to end when rotating, which greatly reduces wear; a sensor assembly 5 is installed on the rotor 2, and the sensor assembly 5 includes a speed sensor 51 (model: WX-C806) and a vibration sensor 51 (model: WX-C806). The signal output ends of the speed sensor 51 and the vibration sensor 52 are respectively connected to the signal input ends of the single-chip controller 6, and the speed sensor 51 and the vibration sensor 52 are respectively used to detect the speed and vibration frequency of the rotor 2; the signal input ends of the first automatic control valve 75 and the second automatic control valve 76 are respectively connected to the control end of the single-chip controller 6, and the single-chip controller 6 can automatically control the opening and closing of the first automatic control valve 75 and the second automatic control valve 76, so as to facilitate the automatic delivery of compressed gas; a pressure gauge 77 (model: Hongrun DP10) is also installed on the gas tank 71 for detecting the air pressure in the gas tank 71, so as to facilitate real-time detection of the air pressure in the gas tank 71.

[0035] When the static-dynamic mixed air-floating bearing rotor system is in use, the single-chip controller 6 controls the first automatic control valve 75 to open, and at the same time turns on the air pump 72 to fill the air tank 71 with compressed gas. After it is full, the air pump 72 and the first air outlet pipe 73 are closed. When the motor 1 drives the rotor 2 to rotate, the single-chip controller 6 controls the second automatic control valve 76 to open, and the air tank 71 inflates the air supply channel 42 through the second air outlet pipe 74. The compressed gas reaches the inside of the air cavity 43 through the air vent 44, allowing the compressed air to enter the inside of the bearing body 41, floating the rotor 2 for contactless accelerated rotation, playing the role of a dynamic pressure bearing. Stopping the pumping of air will play the role of a static pressure bearing, with static and dynamic mixing; during the normal working time of the rotor 2, The rotor 2 is completely floated by the air bearing 4, and at the same time, the air pump 72 fills the air tank 71 with air again for the next use. The utility model enables the rotor 2 to float by the air bearing 4 by pumping air into the air bearing 4 when it rotates at a high speed, so that the rotor 2 has no friction from beginning to end when rotating, which greatly reduces wear and tear and prolongs the service life of the rotor 2. In addition, by providing an air supply mechanism 7, the air supply mechanism 7 includes an air tank 71, an air pump 72, etc., and the air pump 72 can continuously supply air to the air tank 71, and the air tank 71 can supply air to the rotor 2, thereby ensuring that the compressed gas is sufficient for use, without relying on a fixed high-pressure air system, so that the use of air bearings can be expanded to mobile machinery.

[0036] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A static-dynamic hybrid air bearing rotor system, comprising a motor (1), characterized in that: A rotor (2) is installed at the output end of the motor (1), a bearing sleeve (3) is fixed to one side of the motor (1), and an air bearing (4) is installed in the bearing sleeve (3); The air bearing (4) comprises a bearing body (41) mounted on the inner side of the bearing sleeve (3); the outer peripheral wall and the inner peripheral wall of the bearing body (41) are respectively provided with a plurality of air supply channels (42) and air cavities (43); and a plurality of air vents (44) are provided between the air supply channels (42) and the air cavities (43); The motor (1) is provided with an air supply mechanism (7) for taking air into the air supply channel (42); The air supply mechanism (7) comprises an air storage tank (71) and an air pump (72) fixed on the motor (1); the air outlet of the air pump (72) is connected to the air storage tank (71) via a first air outlet pipe (73); the air outlet of the air storage tank (71) is connected to a second air outlet pipe (74) extending to the inner cavity of the air supply channel (42); the first air outlet pipe (73) is provided with a first automatic control valve (75); and the second air outlet pipe (74) is provided with a second automatic control valve (76); A single-chip microcomputer controller (6) is fixed on the motor (1) and is used to control the first automatic control valve (75) and the second automatic control valve (76).

2. The static-dynamic hybrid air bearing rotor system according to claim 1 is characterized in that: The two end surfaces of the bearing body (41) are flat surfaces, which are used to reduce gas leakage in the gas supply channel (42).

3. The static-dynamic hybrid air bearing rotor system according to claim 1, characterized in that: The plurality of air supply channels (42) and air cavities (43) are respectively distributed at equal angles on the outer circumference and the inner circumference of the bearing body (41), and the air supply channels (42) and air cavities (43) exist in pairs.

4. The static-dynamic hybrid air bearing rotor system according to claim 1, characterized in that: A sensor assembly (5) is mounted on the rotor (2), the sensor assembly (5) comprising a rotation speed sensor (51) and a vibration sensor (52), the signal output ends of the rotation speed sensor (51) and the vibration sensor (52) being respectively connected to the signal input end of the single-chip controller (6), the rotation speed sensor (51) and the vibration sensor (52) being used to detect the rotation speed and vibration frequency of the rotor (2).

5. The static-dynamic hybrid air bearing rotor system according to claim 1, characterized in that: The signal input ends of the first automatic control valve (75) and the second automatic control valve (76) are respectively connected to the control end of the single chip controller (6).

6. The static-dynamic hybrid air bearing rotor system according to claim 1, characterized in that: The gas storage tank (71) is also provided with a pressure gauge (77) for detecting the air pressure in the gas storage tank (71).

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