Gas foil bearing takeoff teaching demonstration platform

Abstract

The utility model discloses a gas foil bearing takeoff teaching demonstration platform, and belongs to the field of gas foil bearings. The gas foil bearing takeoff teaching demonstration platform comprises a demonstration platform body, a limiting assembly is assembled on the outer wall of the demonstration platform body and comprises a rotary knob, a first bevel gear is fixedly connected to the outer wall of one end of the demonstration platform body, and a steel wire rope is connected to the outer wall of a second bevel gear. One end of the steel wire rope is fixedly connected with a set screw, and the outer wall of the set screw is in threaded connection with a bearing arc sleeve. According to the takeoff teaching demonstration platform for the gas foil bearing, the red paillette, the limiting assembly and the electron microscope are matched, the steel wire ropes tighten the two ends of the bearing arc sleeve through the set screws, then the position of the bearing arc sleeve is fixed, the bearing arc sleeve is prevented from moving, and the motor driving module is started to drive the foil bearing to take off. When the foil bearing takes off and changes of the red paillettes are observed through an electron microscope, the bearing takes off successfully, and the usability of the whole device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to gas foil bearings, in particular to a gas foil bearing takeoff teaching demonstration platform. Background Art

[0002] Gas foil bearings are generally composed of three parts: a top foil, a wave foil and a bearing seat. They use the gas dynamic pressure effect to support the rotor. They are the most widely studied and applied type of gas bearings at present, and play an important role in aerospace, high-speed turbines, cryogenic technology, air circulation, cryogenic refrigeration, micro gas turbines and other fields. When undergraduate and master students from colleges and research institutes study the relevant principles of gas foil bearings at school, the thickness of the formed air film varies in the micron level, and the formation of the air film cannot be seen by the naked eye. This creates certain obstacles for some students in their studies. When conducting a gas foil bearing takeoff experiment in the laboratory, there are certain safety hazards during the high-speed operation of the rotor, and the process of air film formation of the gas foil bearing cannot be observed. Therefore, a teaching demonstration platform for taking off using a gas foil bearing is very necessary.

[0003] However, the following problems should be solved for the gas foil bearing takeoff teaching demonstration platform: the process of air film formation is very rapid, how to observe whether an air film has been formed between the rotor and the bearing; the rotor speed reaches more than 10,000 revolutions, which poses a hidden danger to the personal safety of the operator; the teaching demonstration platform should be as beautiful, compact and easy to operate as possible. In summary, in order to achieve the teaching demonstration goals safely and intuitively, it is necessary to design a gas foil bearing teaching demonstration platform and solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a gas foil bearing teaching demonstration platform to solve the problems raised in the above-mentioned background technology: during use, the process of gas film formation is very rapid, how to observe whether a gas film has been formed between the rotor and the bearing; the rotation speed of the rotor reaches more than 10,000 revolutions, which poses a hidden danger to the personal safety of the operator.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gas foil bearing takeoff teaching demonstration platform, comprising a demonstration platform, a motor drive module is installed on the outer wall of the demonstration platform, a fixture is installed on the outer wall of the motor drive module, a dummy shaft is installed on the inner wall of the fixture, a gas bearing is installed on the outer wall of the dummy shaft, a limit position assembly is assembled on the outer wall of the demonstration platform, and a protective cover is connected to the outer wall of the demonstration platform;

[0006] The limit assembly includes a knob, which is installed on the surface of the demonstration platform. A first bevel gear is fixedly connected to the outer wall of one end of the demonstration platform, a second bevel gear is meshed with the surface of the first bevel gear, a wire rope is connected to the outer wall of the second bevel gear, one end of the wire rope is fixedly connected to a set screw, a bearing arc sleeve is threadedly connected to the outer wall of the set screw, and the bearing arc sleeve is arranged on the surface of the gas bearing.

[0007] Preferably, a brake is fixedly connected to the outer wall of one end of the second bevel gear, and the brake is installed inside the demonstration table. Through the setting of the brake, the brake is a device with the function of slowing down, stopping or keeping the moving parts in a stopped state, so that the second bevel gear can remain stationary without turning the knob.

[0008] Preferably, a support block is fixedly connected to the surface of the demonstration table, and the support block is symmetrically arranged with respect to the central axis of the demonstration table. A pulley is rotatably connected to the outer wall of the demonstration table. Through the arrangement of the support block and the pulley, the support block supports the wire rope, so that one end of the wire rope can be maintained on the same horizontal line with the bearing arc sleeve, and the pulley can ensure the smoothness of pulling the wire rope.

[0009] Preferably, the motor drive module includes a motor and a driver, and a red sequin is installed on the outer wall of one end of the motor drive module. Through the setting of the red sequin, the red sequin is installed at the projection position of the contact between the upper part of the bearing and the dummy shaft. When the bearing takes off, the changed red sequin can be observed through an electron microscope, indicating that the bearing has taken off successfully.

[0010] Preferably, a plurality of card slots are provided on the outer wall of the demonstration platform, and a plurality of card blocks are fixedly connected to the inner wall of the protective cover. The card slots and the card blocks are arranged to position the installation of the protective cover.

[0011] Preferably, an electron microscope is installed on the outer wall of the demonstration platform, and the electron microscope is connected to a computer device, so that the demonstration data can be transmitted to the computer for viewing and storage.

[0012] Preferably, a fixing component is assembled on the outer wall of the protective cover, and the fixing component includes a fixing column, which is installed on the surface of the protective cover, a fixing block is fixedly connected to the outer wall of one end of the fixing column, a connecting spring is fixedly connected to the inner wall of the fixing column, a slider is fixedly connected to the outer wall of one end of the connecting spring, and the slider is slidably connected to the fixing column, a limiting spring is fixedly connected to the inner wall of the demonstration table, and a limiting block is fixedly connected to the outer wall of one end of the limiting spring, an air chamber is provided inside the demonstration table, a piston rod is slidably connected to the inside of the air chamber, a reset spring is fixedly connected to the outer wall of the piston rod, a connecting plate is slidably connected to the inner wall of the demonstration table, and a connecting groove is provided on the outer wall of the protective cover.

[0013] Preferably, a through hole for air circulation is provided between the air bin and the connecting plate, and the through hole can ensure normal circulation of air between the air bin and the connecting plate.

[0014] The difference from the prior art is that the beneficial effects of this application are:

[0015] (1) The gas foil bearing takeoff teaching demonstration platform uses red sequins, limit components and an electron microscope. The wire rope tightens the two ends of the bearing arc sleeve through the set screws, thereby fixing the position of the bearing arc sleeve to prevent it from moving. The motor drive module is started to drive the foil bearing to take off. When the red sequins change after the foil bearing takes off, it is observed through an electron microscope that the bearing has taken off successfully, which improves the overall usability of the device.

[0016] (2) The gas foil bearing takeoff teaching demonstration platform can position the fixed column and the gas chamber through the cooperation of the fixing component, the slot and the block. The snap connection between the slot and the block can complete the installation of the protective cover by pushing the fixed column so that the limit block is stuck to the fixed block. After pushing the fixed column again and then quickly pulling it out, the restriction between the protective cover and the podium can be released, thereby improving the overall usability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the appearance structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the motor drive module and the red sequins cooperating with each other in the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the knob and the first bevel gear cooperating with each other in the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the support block and the pulley cooperating with each other in the utility model;

[0021] Figure 5This is a schematic diagram of the structure of the protective cover and the fixing column cooperating with each other in the utility model;

[0022] Figure 6 This is a schematic diagram of the structure in which the connecting spring and the slider cooperate with each other in the utility model.

[0023] In the figure:

[0024] 100, demonstration table; 200, motor drive module; 300, red sequins; 400, fixture; 500, dummy shaft; 600, gas bearing;

[0025] 700, limit assembly; 701, knob; 702, first bevel gear; 703, second bevel gear; 704, brake; 705, wire rope; 706, support block; 707, pulley; 708, set screw; 709, bearing arc sleeve;

[0026] 800, protective cover;

[0027] 900, fixing assembly; 901, fixing column; 902, fixing block; 903, connecting spring; 904, sliding block; 905, limiting spring; 906, limiting block; 907, air chamber; 908, piston rod; 909, return spring; 910, connecting plate; 911, connecting groove;

[0028] 1000. card slot; 1100. card block; 1200. electron microscope. DETAILED DESCRIPTION

[0029] 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 of 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.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model are described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] In the present invention, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0032] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0033] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0034] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] Embodiment 1

[0036] See also Figure 1 - Figure 5 As shown in the figure, the gas foil bearing takeoff teaching demonstration platform includes a demonstration platform 100, a motor drive module 200 is installed on the outer wall of the demonstration platform 100, a fixture 400 is installed on the outer wall of the motor drive module 200, a dummy shaft 500 is installed on the inner wall of the fixture 400, a gas bearing 600 is installed on the outer wall of the dummy shaft 500, a limit position assembly 700 is assembled on the outer wall of the demonstration platform 100, and a protective cover 800 is connected to the outer wall of the demonstration platform 100;

[0037] The limit assembly 700 includes a knob 701, which is mounted on the surface of the demonstration platform 100. A first bevel gear 702 is fixedly connected to the outer wall of one end of the demonstration platform 100. A second bevel gear 703 is meshed on the surface of the first bevel gear 702. A brake 704 is fixedly connected to the outer wall of one end of the second bevel gear 703, and one end of the brake 704 is mounted inside the demonstration platform 100. The brake 704 is a device with functions such as slowing down, stopping or keeping the moving parts in a stopped state, so that the second bevel gear 703 can remain stationary without turning the knob 701. A steel wire rope 705 is connected to the outer wall of the second bevel gear 703, one end of the steel wire rope 705 is fixedly connected to a set screw 708, and the surface of the steel wire rope 705 is connected to a pulley 707 fixed to the surface of the demonstration platform 100 through a support block 706, which supports the steel wire rope 705 so that one end of the steel wire rope 705 can be kept on the same horizontal line with the bearing arc sleeve 709. A bearing arc sleeve 709 is threadedly connected to the outer wall of the set screw 708 , and the bearing arc sleeve 709 is arranged on the surface of the gas bearing 600 .

[0038] When in use, first install the foil bearing inside the bearing arc sleeve 709, then thread the fixing screw 708 with the bearing arc sleeve 709, so that one end of the fixing screw 708 presses the surface of the foil bearing, thereby fixing the foil bearing inside the bearing arc sleeve 709, then turn the knob 701 to drive the first bevel gear 702 to rotate, and through the meshing of the first bevel gear 702 and the second bevel gear 703, drive the second bevel gear 703 to rotate, thereby winding the wire rope 705, so that the wire rope 705 is tightened at both ends of the bearing arc sleeve 709 through the fixing screw 708, thereby fixing the position of the bearing arc sleeve 709 to prevent it from moving, then connect the external power supply, start the motor drive module 200, and drive the dummy shaft 500 to rotate on the inner surface of the gas bearing 600 through the clamp 400, when the foil bearing takes off, the change of the red sequin 300 is observed through the electron microscope 1200, indicating that the bearing takes off successfully, thereby improving the overall usability of the device.

[0039] See also Figure 1 - Figure 6As shown in the figure, a fixing assembly 900 is assembled on the outer wall of the protective cover 800, and the fixing assembly 900 includes a fixing column 901, and the fixing column 901 is installed on the surface of the protective cover 800. A fixing block 902 is fixedly connected to the outer wall of one end of the fixing column 901, and a connecting spring 903 is fixedly connected to the inner wall of the fixing column 901. A slider 904 is fixedly connected to the outer wall of one end of the connecting spring 903. The connecting spring 903 can push the slider 904 to reset when the slider 904 is not subjected to force. The slider 904 is slidably connected to the fixed column 901, a limit spring 905 is fixedly connected to the inner wall of the demonstration platform 100, and a limit block 906 is fixedly connected to the outer wall of one end of the limit spring 905. An air chamber 907 is provided inside the demonstration platform 100, and a piston rod 908 is slidably connected to the inside of the air chamber 907. A return spring 909 is fixedly connected to the outer wall of the piston rod 908, a connecting plate 910 is slidably connected to the inner wall of the demonstration platform 100, and a connecting groove 911 is provided on the outer wall of the protective cover 800.

[0040] When in use, first put the protective cover 800 on the surface of the demonstration table 100, and insert the card block 1100 inside the protective cover 800 into the card slot 1000 on the surface of the demonstration table 100, then push the fixed column 901 to slide into the inside of the air chamber 907, so that the fixed block 902 squeezes the surface of the limit block 906, and the limit block 906 moves toward the limit spring 905 under the action of external force, and exerts pressure on the limit spring 905. When the fixed block 902 passes through the surface of the limit block 906, the limit spring 905 is pushed by the force The limiting block 906 squeezes the surface of the fixing column 901, thereby limiting the fixing block 902. When the fixing column 901 slides into the air chamber 907, one end of the fixing column 901 squeezes the surface of the piston rod 908. After being squeezed, the piston rod 908 slides into the air chamber 907 and squeezes the air and the return spring 909 inside the air chamber 907. After being squeezed, the air inside the air chamber 907 expands outward, thereby pushing the connecting plate 910 to slide outward, thereby getting stuck in the connecting groove 911 on the surface of the protective cover 800. 902, and the protective cover 800 is fixed to the surface of the demonstration table 100. When the protective cover 800 needs to be removed, the fixing column 901 is pushed to slide into the air chamber 907 again, so that the slider 904 squeezes the arc surface of the limit block 906. When the slider 904 passes through the surface of the limit block 906, the fixing column 901 is pulled outward, and the limit block 906 pushes the slider 904 to move toward the surface of the fixing block 902. When the surface of the slider 904 fits the surface of the fixing block 902, the fixing column 901 is continued to be pulled. Block 904 lifts the limit block 906 through the inclined surface of the surface. When the slider 904 slides out of the surface of the limit block 906, the limit block 906 will be pushed to the inclined surface of the surface of the fixed block 902 by the limit spring 905, thereby releasing the limit on the fixed column 901, and the piston rod 908 is reset under the push of the reset spring 909, thereby drawing the air inside the air chamber 907, thereby pulling the connecting plate 910 out of the connecting groove 911, and the protective cover 800 can be removed from the surface of the demonstration table 100, thereby improving the overall usability of the device.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A gas foil bearing takeoff teaching demonstration platform, comprising a demonstration platform (100), wherein a motor drive module (200) is installed on the outer wall of the demonstration platform (100), a fixture (400) is installed on the outer wall of the motor drive module (200), a dummy shaft (500) is installed on the inner wall of the fixture (400), a gas bearing (600) is installed on the outer wall of the dummy shaft (500), a limit position assembly (700) is assembled on the outer wall of the demonstration platform (100), and a protective cover (800) is connected to the outer wall of the demonstration platform (100); Features: The limit assembly (700) comprises a knob (701), wherein the knob (701) is mounted on the surface of the demonstration platform (100), a first bevel gear (702) is fixedly connected to the outer wall of one end of the demonstration platform (100), a second bevel gear (703) is meshed on the surface of the first bevel gear (702), a steel wire rope (705) is connected to the outer wall of the second bevel gear (703), one end of the steel wire rope (705) is fixedly connected to a set screw (708), a bearing arc sleeve (709) is threadedly connected to the outer wall of the set screw (708), and the bearing arc sleeve (709) is arranged on the surface of the gas bearing (600).

2. The gas foil bearing takeoff teaching demonstration platform according to claim 1 is characterized by: A brake (704) is fixedly connected to the outer wall of one end of the second bevel gear (703), and the brake (704) is installed inside the demonstration platform (100).

3. The gas foil bearing takeoff teaching demonstration platform according to claim 1, characterized in that: A support block (706) is fixedly connected to the surface of the demonstration platform (100), and the support block (706) is symmetrically arranged with respect to the central axis of the demonstration platform (100). A pulley (707) is rotatably connected to the outer wall of the demonstration platform (100).

4. The gas foil bearing takeoff teaching demonstration platform according to claim 1, characterized in that: The motor drive module (200) comprises a motor and a driver, and a red sequin (300) is installed on an outer wall at one end of the motor drive module (200).

5. The gas foil bearing takeoff teaching demonstration platform according to claim 1 is characterized by: The outer wall of the demonstration platform (100) is provided with a plurality of card slots (1000), and the inner wall of the protective cover (800) is fixedly connected with a plurality of card blocks (1100).

6. The gas foil bearing takeoff teaching demonstration platform according to claim 1, characterized in that: An electron microscope (1200) is installed on the outer wall of the demonstration platform (100).

7. The gas foil bearing takeoff teaching demonstration platform according to claim 1 is characterized by: The outer wall of the protective cover (800) is equipped with a fixing assembly (900), and the fixing assembly (900) includes a fixing column (901), and the fixing column (901) is installed on the surface of the protective cover (800), and a fixing block (902) is fixedly connected to the outer wall of one end of the fixing column (901), and a connecting spring (903) is fixedly connected to the inner wall of the fixing column (901), and a sliding block (904) is fixedly connected to the outer wall of one end of the connecting spring (903), and the sliding block (904) is slidably connected to the fixing column (901). A limit spring (905) is fixedly connected to the inner wall of the demonstration platform (100), a limit block (906) is fixedly connected to the outer wall of one end of the limit spring (905), an air chamber (907) is provided inside the demonstration platform (100), a piston rod (908) is slidably connected to the inside of the air chamber (907), a return spring (909) is fixedly connected to the outer wall of the piston rod (908), a connecting plate (910) is slidably connected to the inner wall of the demonstration platform (100), and a connecting groove (911) is provided on the outer wall of the protective cover (800).

8. The gas foil bearing takeoff teaching demonstration platform according to claim 7 is characterized by: A through hole for air circulation is provided between the air chamber (907) and the connecting plate (910).

Images