CN117554021A - Movable floor suction-floating cooling device based on vacuum pre-pressing air bearing - Google Patents
Movable floor suction-floating cooling device based on vacuum pre-pressing air bearing Download PDFInfo
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- CN117554021A CN117554021A CN202410047097.5A CN202410047097A CN117554021A CN 117554021 A CN117554021 A CN 117554021A CN 202410047097 A CN202410047097 A CN 202410047097A CN 117554021 A CN117554021 A CN 117554021A
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- 238000001816 cooling Methods 0.000 title claims abstract description 42
- 238000003825 pressing Methods 0.000 title claims abstract description 36
- 230000001105 regulatory effect Effects 0.000 claims abstract description 24
- 238000007664 blowing Methods 0.000 claims abstract description 8
- 238000012544 monitoring process Methods 0.000 claims abstract description 8
- 239000011159 matrix material Substances 0.000 claims abstract description 5
- 238000006073 displacement reaction Methods 0.000 claims description 27
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 5
- 230000009191 jumping Effects 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims 2
- 238000012360 testing method Methods 0.000 abstract description 13
- 239000007789 gas Substances 0.000 description 21
- 238000010586 diagram Methods 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 238000012876 topography Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention relates to the field of wind tunnel tests, in particular to a movable floor suction-floating cooling device based on a vacuum pre-pressing air bearing. The vacuum pre-pressing air bearing device comprises a movable belt, a supporting matrix, a vacuum pre-pressing air bearing module, a high-pressure air supply subsystem, a negative-pressure air exhaust subsystem, a monitoring subsystem and a control subsystem, wherein the vacuum pre-pressing air bearing module is arranged on the supporting matrix, and the vacuum pre-pressing air bearing module is arranged below the upper surface of the movable belt; the high-pressure air supply subsystem consists of an air compressor, an air tank, a cooling dryer, a high-pressure air circuit and an electric pressure regulating valve and is used for providing clean low-temperature high-pressure air for micro-nano holes in the vacuum pre-pressed air bearing; the high-pressure gas is filtered by a cooling dryer so as to achieve the purpose of cooling the moving belt by blowing the low-temperature gas.
Description
Technical Field
The invention relates to the field of wind tunnel tests, in particular to a movable floor suction-floating cooling device based on a vacuum pre-pressing air bearing.
Background
Wind tunnel testing is an integral part of the development work of aircraft. This test method allows easy control of flow conditions. During the test, the model or the real object is usually fixed in a wind tunnel for repeated blowing, and test data are obtained through a measurement and control instrument and equipment. However, in real flight, the stationary atmosphere is borderless. In wind tunnels, the airflow is bounded, and the existence of the boundary makes the wind tunnel flow field different from the flow field of real flight. Such boundary effects will result in inaccurate measurement of the aerodynamic parameters of the test object. Therefore, the ground of the test section often needs to be moved during the wind tunnel test. The current method is to simulate a moving road surface in a wind tunnel by using a moving belt of rotary motion, wherein the moving belt has a flat upper surface with a large breadth and has the same speed as wind speed. However, since the test model or the real object needs to be fixed above the moving belt to repeatedly blow, different loads are inevitably generated on the moving belt, and therefore the flatness of the upper surface of the moving belt is damaged, and the flatness of the moving belt is directly related to the accuracy of test data. In particular, the positive pressure generated by the air flow field on the surface of the movable belt can cause the movable belt to be subjected to the downward pressure of the order of kilonewtons. And thus friction is generated between the upper surface of the moving belt and the apparatus body, thereby generating heat. Not only the life of the moving belt is affected, but also the belt is loosened due to thermal deformation and thus slipped. Thus, ensuring that the high speed moving belt has a flat upper surface under different loads is a necessary function of the moving road simulation device.
Disclosure of Invention
The invention aims to keep a high-speed moving belt to have a flat upper surface under different loads, and provides a moving belt floor suction-floating cooling device based on a vacuum pre-pressing air bearing. The realization strategy is that a vacuum precompaction air bearing with even and densely distributed is additionally arranged below the moving belt. The vacuum pre-pressing air bearing is provided with an annular vacuum area and an annular micro-nano pore, the vacuum area is subjected to negative pressure air suction by a vacuum pump, the micro-nano pore is subjected to high-pressure air blowing by an air compressor, and then a hard air film is formed between the vacuum pre-pressing air bearing and the movable belt, so that the purpose that the upper surface of the movable belt running at high speed is kept flat under different loads can be achieved. In addition, the high-pressure gas is filtered by the cooling dryer so as to achieve the purpose of cooling the moving belt by blowing the low-temperature gas.
The vacuum preloading air bearing module is arranged on the supporting substrate and below the upper surface of the moving belt;
the high-pressure air supply subsystem consists of an air compressor, an air tank, a cooling dryer, a high-pressure air circuit and an electric pressure regulating valve and is used for providing clean low-temperature high-pressure air for micro-nano holes in the vacuum pre-pressed air bearing; the outlet end of the air compressor is connected with the inlet end of the air tank through a sealed air pipeline, the outlet end of the air tank is connected with the inlet end of the cooling dryer through a sealed air pipeline, and the cooling high-pressure gas from the outlet end of the cooling dryer supplies air for the vacuum pre-pressing air bearing through a high-pressure gas circuit; an electric pressure regulating valve is arranged on a high-pressure air path from the cooling dryer to each vacuum pre-pressing air bearing, and the air supply pressure of each vacuum pre-pressing air bearing is controlled;
the monitoring subsystem consists of 35 displacement sensors and 4 temperature sensors, and monitors the jumping amount of each area of the moving belt and the overall temperature in real time; the displacement sensor and the temperature sensor are mounted on the supporting substrate.
The supporting matrix is composed of a steel skeleton and provides an installation position for the vacuum pre-pressed air bearing.
The vacuum preloading air bearing module consists of 1224 vacuum preloading air bearings; the upper surface of each vacuum preloading air bearing is provided with micro-nano pores with uniform density and is used for blowing high-pressure gas; the central annular region of each vacuum preloaded air bearing serves to create a vacuum region.
The negative pressure air extraction subsystem consists of a vacuum pump and a vacuum regulating valve, and a negative pressure area is formed between a central annular area of the vacuum pre-compression air bearing and the movable belt.
The displacement sensor is a non-contact laser sensor, and judges the position change of the moving belt by emitting laser and receiving reflected light, and the model of the displacement sensor is Kirschner IL-065.
The temperature sensor is a pulse electronic temperature sensor PT100, and the model is P0.HDM6115.PB3L1000.
The control subsystem takes the PLC main control unit as a core, and aims at the actual working condition of the load of each region of the movable belt in the running process, and the negative pressure air suction subsystem is controlled in real time to provide negative pressure for the region.
The control subsystem comprehensively evaluates the overall fluctuation state of the upper surface of the movable belt through 35 displacement sensors, and further controls the vacuum regulating valve to provide different negative pressure sizes for different areas so as to adjust the compression resistance and the tensile resistance of the movable belt and achieve the purpose of keeping the movable belt flat. The control subsystem comprehensively evaluates the temperature of the moving belt through 4 temperature sensors, and further controls the cooling dryer to provide high-pressure gas with different temperatures.
The beneficial effects of the invention are as follows:
a hard air film is formed between the vacuum pre-pressed air bearing and the movable belt, so that the movable belt can resist compression and tension, and the purpose that the upper surface of the movable belt running at high speed is kept flat under different loads is achieved. In addition, the high-pressure gas is filtered by a cooling dryer so as to achieve the purpose of cooling the moving belt by blowing the low-temperature gas;
the bulge degree of the movable belt in each area can be adjusted by adjusting the high-pressure air pressure value of each vacuum pre-pressing air bearing, so that an aerodynamic test system for simulating a rough road surface can be created;
the side of the movable belt can be moved closer by adjusting the high-pressure air pressure value of the vacuum pre-pressing air bearing below one side of the edge of the movable belt, and then the movable belt can be rectified under the non-uniform tensioning when the movable belt is deviated.
Drawings
The invention will be described in further detail with reference to the accompanying drawings and detailed description.
FIG. 1 is a schematic diagram of the overall composition of a suction and floating cooling device;
FIG. 2 is a partial schematic view of a suction flotation cooling device;
FIG. 3 is a schematic diagram of a vacuum preloaded air bearing;
FIG. 4 is a schematic diagram II of a vacuum preloaded air bearing;
FIG. 5 is a schematic diagram of a displacement sensor;
FIG. 6 is a schematic illustration of a moving belt;
FIG. 7 is a schematic view of a support substrate;
FIG. 8 is a schematic diagram of a temperature sensor;
FIG. 9 is a flow chart of a control subsystem controlling temperature;
FIG. 10 is a flow chart of the control subsystem controlling vacuum preload air bearing pressure;
FIG. 11 is a graph showing a profile of a laser displacement sensor;
fig. 12 is a three-dimensional surface topography.
In the figure: vacuum preloading an air bearing 1; a displacement sensor 2; a temperature sensor 3; a moving belt 4; and a support base 5.
Detailed Description
As shown in fig. 1, 2, 6 and 7, the vacuum pre-pressing air bearing-based movable belt floor suction and floatation cooling device comprises a movable belt 4, a supporting substrate 5, a vacuum pre-pressing air bearing module, a high-pressure air supply subsystem, a negative pressure air extraction subsystem, a monitoring subsystem and a control subsystem, wherein the vacuum pre-pressing air bearing module is arranged on the supporting substrate 5, and the vacuum pre-pressing air bearing module is arranged below the upper surface of the movable belt 4;
the high-pressure air supply subsystem consists of an air compressor, an air tank, a cooling dryer, a high-pressure air circuit and an electric pressure regulating valve, and provides clean low-temperature high-pressure air for micro-nano holes in the vacuum pre-pressed air bearing 1; the outlet end of the air compressor is connected with the inlet end of the air tank through a sealed air pipeline, the outlet end of the air tank is connected with the inlet end of the cooling dryer through a sealed air pipeline, and the cooling high-pressure gas from the outlet end of the cooling dryer supplies air for the vacuum pre-pressing air bearing through a high-pressure gas circuit; an electric pressure regulating valve is arranged on a high-pressure air path from the cooling dryer to each vacuum pre-pressing air bearing, and the air supply pressure of each vacuum pre-pressing air bearing is controlled; the high-pressure gas is obtained through the air compressor and stored through the gas tank, water/oil in the air can be precipitated and primarily cooled in the process, a stable gas source can be further provided for the follow-up, then the gas is led to each vacuum preloading air bearing 1 through the gas path, and the gas is firstly led to the vacuum preloading air bearing 1 through the electric pressure regulating valve before entering the vacuum preloading air bearing 1, so that the high-pressure of the single vacuum preloading air bearing 1 is conveniently regulated, and different upward pulling forces are provided for the movable belt 4.
The monitoring subsystem consists of 35 displacement sensors 2 and 4 temperature sensors 3, and monitors the jumping amount of each area of the moving belt 4 and the overall temperature in real time; the displacement sensor 2 and the temperature sensor 3 are mounted on a support base 5.
As can be seen from fig. 1, the wind direction is from right to left, and the arrow direction in fig. 1 is the wind direction and the rolling direction of the moving belt 4. After the moving belt 4 moves leftwards through the right roller, heat is generated due to friction with the roller, and the temperature of the moving belt 4 can be monitored by the right upper and lower temperature sensors 3. The reason for the up-down arrangement is that in order to prevent the roller from being deviated, when the roller is deviated, the degree of tension of the up-down both sides moving belt 4 is changed, the up-down friction force is also changed, and the friction temperature from the up-down both sides is also different. The arrangement above and below can fully monitor the temperature of the moving belt 4 in the case of offset and can also provide a reference for whether the moving belt 4 is offset or not. The two temperature sensors 3 on the left side are downstream of the temperature sensor 3 on the right side, and the temperature change of the moving belt 4 after passing through the center area can be monitored according to the rotation speed to measure the cooling effect and judge whether the temperature of the high-pressure gas needs to be further reduced.
The displacement sensor 2 is mounted on the support base 5, and the displacement sensor 2 is a non-contact laser sensor, and determines the change in position of the moving belt 4 by emitting laser light and receiving reflected light. The total of 35 laser displacement sensors 2 are uniformly distributed below the working surface of the movable belt 4, the distribution of the 35 laser displacement sensors 2 is shown in fig. 11, zero setting is carried out at the initial leveling position of the movable belt 4, when each position on the surface of the movable belt 4 is jumped, the interpolation smoothing treatment is carried out according to the displacement change of the movable belt 4 measured by each laser displacement sensor 2, a three-dimensional surface topography is drawn, the three-dimensional surface topography is shown in fig. 12, and the high pressure of the corresponding vacuum pre-pressing air bearing 1 is regulated according to the displacement change of the movable belt 4, so that different supporting forces are provided for the movable belt 4 in different areas, and the leveling of the movable belt 4 is ensured.
As shown in fig. 7, the supporting base body 5 is composed of a steel skeleton, and provides an installation position for the vacuum preloading air bearing 1.
As shown in fig. 1-4, the vacuum preloading air bearing module consists of 1224 vacuum preloading air bearings 1; the upper surface of each vacuum preloading air bearing 1 is provided with micro-nano pores with uniform density and is used for blowing high-pressure gas; the central annular region of each vacuum preloaded air bearing 1 serves to form a vacuum region.
When the moving belt 4 receives an upward pulling force, the moving belt 4 may jump upward. At this time, the suction negative pressure of the vacuum preloading air bearing 1 is enhanced, thereby providing a higher pull-down force for the moving belt 4. Also, when the moving belt 4 receives a pressing force, the moving belt 4 may jump downward. At this time, the suction negative pressure of the vacuum preloading air bearing 1 is weakened, thereby providing a higher upward pulling force to the moving belt 4.
The negative pressure air extraction subsystem consists of a vacuum pump and a vacuum regulating valve, and a negative pressure area is formed between the central annular area of the vacuum pre-compression air bearing 1 and the movable belt 4. The vacuum pump is used for pumping air, and the vacuum pump is connected with the vacuum pre-pressing air bearing 1 through a vacuum air path, so that negative pressure is provided. Before the vacuum air path is connected to the vacuum pre-pressing air bearing 1, a vacuum regulating valve is arranged for conveniently regulating the suction negative pressure of the single vacuum pre-pressing air bearing 1, so that different pull-down forces are provided for the movable belt 4.
The displacement sensor 2 is a non-contact laser sensor, and judges the position change of the moving belt 4 by emitting laser and receiving reflected light, and the model of the displacement sensor 2 is a kenji IL-065.
The temperature sensor 3 is a pulse electronic temperature sensor PT100, and the model is P0.HDM6115.PB3L1000.
The control subsystem takes a PLC main control unit as a core, and aims at the actual working conditions of the load of each region of the movable belt 4 in the running process, and the negative pressure air suction subsystem is controlled in real time to provide negative pressure for the region.
The control subsystem comprehensively evaluates the overall fluctuation state of the upper surface of the movable belt 4 through 35 displacement sensors 2, and further controls the vacuum regulating valve to provide different negative pressures for different areas so as to adjust the compression resistance and the tensile resistance of the movable belt 4 and achieve the purpose of keeping the movable belt 4 smooth. The control subsystem comprehensively evaluates the temperature of the moving belt 4 through 4 temperature sensors 3, and further controls the cooling dryer to provide high-pressure gas with different temperatures.
The PLC master control unit is specifically a siemens 1200 series standard CPU1215C.
The control process of the PLC main control unit comprises the following steps: when the PLC main control unit monitors that the jumping value of the moving belt in a certain area exceeds a set threshold value through the laser displacement sensor, the PLC main control unit can directly control the vacuum pump to output a vacuum negative pressure value, and can also control the vacuum negative pressure value of the vacuum precompaction air bearing 1 in different areas through controlling the vacuum regulating valve. Similarly, the PLC main control unit can directly control the air compressor to output a high-pressure air value, and also can control the high-pressure air pressure value of the vacuum precompaction air bearing 1 in different areas by controlling the electric pressure regulating valve.
As shown in fig. 9 and 10, when the movable belt 4 is operated at a high speed and the upper surface of the movable belt 4 is subjected to a load change due to the posture adjustment of the test model or the physical object, the fluctuation state of the upper surface of the movable belt 4 in each region is monitored by the 35 displacement sensors 2 of the monitoring subsystem. When the fluctuation of the upper surface of a certain area of the movable belt 4 is detected to exceed a certain threshold value, the control subsystem controls the vacuum regulating valve of the area to output different negative pressures so as to achieve the aim of regulating the compression and tension resistance of the upper surface of the movable belt 4 of the area and further ensure the flatness of the upper surface of the movable belt 4. When the fluctuation of the upper surface of the movable belt 4 is severe, the electric pressure regulating valve in the corresponding area is regulated by the control subsystem to control the pressure value of the output gas when the fluctuation cannot be satisfied by regulating the negative pressure, and then the negative pressure regulation is matched to cope with severe working conditions. The temperature of the moving belt 4 is comprehensively evaluated through 4 temperature sensors 3, so that the cooling dryer is controlled to provide high-pressure gases with different temperatures.
Further, the degree of bulge of the moving belt 4 in each region can be adjusted by adjusting the high-pressure air pressure value of each vacuum pre-pressed air bearing 1, and thus an aerodynamic test system simulating a rough road surface can be created.
Further, by adjusting the high-pressure air pressure value of the vacuum pre-pressing air bearing 1 below one side of the edge of the moving belt 4, the moving belt 4 can be tightened more tightly, and when the moving belt 4 deflects, the moving belt 4 can be rectified under the non-uniform tensioning.
Claims (8)
1. The utility model provides a remove area floor cooling device that floats based on vacuum pre-compaction air bearing, includes removal area (4), support base member (5), vacuum pre-compaction air bearing module, high-pressure air feed subsystem, negative pressure air bleed subsystem, monitoring subsystem and control subsystem, its characterized in that: the support base body (5) is provided with a vacuum pre-pressing air bearing module, and the vacuum pre-pressing air bearing module is arranged below the upper surface of the movable belt (4);
the high-pressure air supply subsystem consists of an air compressor, an air tank, a cooling dryer, a high-pressure air circuit and an electric pressure regulating valve and is used for providing clean low-temperature high-pressure air for micro-nano holes in the vacuum pre-pressed air bearing (1); the outlet end of the air compressor is connected with the inlet end of the air tank through a sealed air pipeline, the outlet end of the air tank is connected with the inlet end of the cooling dryer through a sealed air pipeline, and the cooling high-pressure gas from the outlet end of the cooling dryer supplies air for the vacuum pre-pressing air bearing through a high-pressure gas circuit; an electric pressure regulating valve is arranged on a high-pressure air path from the cooling dryer to each vacuum pre-pressing air bearing, and the air supply pressure of each vacuum pre-pressing air bearing is controlled;
the monitoring subsystem consists of 35 displacement sensors (2) and 4 temperature sensors (3) and is used for monitoring the jumping amount of each region of the movable belt (4) and the overall temperature in real time; the displacement sensor (2) and the temperature sensor (3) are arranged on the supporting matrix (5);
the vacuum preloading air bearing module consists of 1224 vacuum preloading air bearings (1); the upper surface of each vacuum preloading air bearing (1) is provided with micro-nano pores with uniform density and is used for blowing high-pressure gas; the central annular region of each vacuum preloading air bearing (1) is used for forming a vacuum region;
the negative pressure air extraction subsystem consists of a vacuum pump and a vacuum regulating valve, and a negative pressure area is formed between a central annular area of the vacuum pre-compression air bearing (1) and the movable belt (4).
2. The movable floor floating cooling device based on the vacuum preloading air bearing, as set forth in claim 1, wherein: the supporting matrix (5) is composed of a steel skeleton, and provides an installation position for the vacuum preloading air bearing (1).
3. The movable floor floating cooling device based on the vacuum preloading air bearing, as set forth in claim 1, wherein: the displacement sensor (2) is a non-contact laser sensor, and judges the position change of the moving belt (4) by emitting laser and receiving reflected light, and the model of the displacement sensor (2) is Crohn IL-065.
4. The movable floor floating cooling device based on the vacuum preloading air bearing, as set forth in claim 1, wherein: the temperature sensor (3) is a pulse electronic temperature sensor PT100, and the model is P0.HDM6115.PB3L1000.
5. The movable floor floating cooling device based on the vacuum preloading air bearing, which is characterized in that: the control subsystem takes the PLC main control unit as a core, and aims at the actual working conditions of the load born by each region of the movable belt (4) in the operation process, and the negative pressure air extraction subsystem is controlled in real time to provide negative pressure for the region.
6. The movable floor floating cooling device based on the vacuum preloading air bearing, which is characterized in that: the control subsystem comprehensively evaluates the overall fluctuation state of the upper surface of the movable belt (4) through 35 displacement sensors (2), and controls the vacuum pump to provide different negative pressures for different areas so as to adjust the compression resistance and the tensile resistance of the movable belt (4); the control subsystem comprehensively evaluates the temperature of the moving belt (4) through 4 temperature sensors (3).
7. The movable floor floating cooling device based on the vacuum preloading air bearing, as set forth in claim 1, wherein: the degree of bulge of the moving belt (4) in each region can be adjusted by adjusting the high-pressure air pressure value of each vacuum pre-pressing air bearing (1).
8. The movable floor floating cooling device based on the vacuum preloading air bearing, as set forth in claim 1, wherein: by adjusting the high-pressure air pressure value of the vacuum pre-pressing air bearing (1) below one side of the edge of the moving belt (4), the moving belt (4) can be stretched more tightly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410047097.5A CN117554021A (en) | 2024-01-12 | 2024-01-12 | Movable floor suction-floating cooling device based on vacuum pre-pressing air bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410047097.5A CN117554021A (en) | 2024-01-12 | 2024-01-12 | Movable floor suction-floating cooling device based on vacuum pre-pressing air bearing |
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| CN117554021A true CN117554021A (en) | 2024-02-13 |
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| CN202410047097.5A Pending CN117554021A (en) | 2024-01-12 | 2024-01-12 | Movable floor suction-floating cooling device based on vacuum pre-pressing air bearing |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1623219A (en) * | 2001-12-27 | 2005-06-01 | 考夫乐科学方案有限公司 | High-performance non-contact support platforms |
| US20060219605A1 (en) * | 2004-11-08 | 2006-10-05 | Devitt Andrew J | Non-contact porous air bearing and glass flattening device |
| CN112780678A (en) * | 2021-01-05 | 2021-05-11 | 昆明理工大学 | Ultra-smooth air static pressure thrust bearing support system |
| CN115683535A (en) * | 2022-10-26 | 2023-02-03 | 哈尔滨工业大学 | Air floatation system for ensuring surface smoothness of high-speed moving belt |
| CN117249167A (en) * | 2023-10-16 | 2023-12-19 | 哈尔滨工业大学 | Air floatation device |
-
2024
- 2024-01-12 CN CN202410047097.5A patent/CN117554021A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1623219A (en) * | 2001-12-27 | 2005-06-01 | 考夫乐科学方案有限公司 | High-performance non-contact support platforms |
| US20060219605A1 (en) * | 2004-11-08 | 2006-10-05 | Devitt Andrew J | Non-contact porous air bearing and glass flattening device |
| CN112780678A (en) * | 2021-01-05 | 2021-05-11 | 昆明理工大学 | Ultra-smooth air static pressure thrust bearing support system |
| CN115683535A (en) * | 2022-10-26 | 2023-02-03 | 哈尔滨工业大学 | Air floatation system for ensuring surface smoothness of high-speed moving belt |
| CN117249167A (en) * | 2023-10-16 | 2023-12-19 | 哈尔滨工业大学 | Air floatation device |
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