CN212250826U - Air floatation guide rail and unloading platform for gravity unloading experiment - Google Patents
Air floatation guide rail and unloading platform for gravity unloading experiment Download PDFInfo
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- CN212250826U CN212250826U CN202020651439.1U CN202020651439U CN212250826U CN 212250826 U CN212250826 U CN 212250826U CN 202020651439 U CN202020651439 U CN 202020651439U CN 212250826 U CN212250826 U CN 212250826U
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Abstract
The utility model discloses an air supporting guide rail and uninstallation platform for gravity uninstallation experiment, aim at solving the gravity uninstallation experiment that exists among the prior art, the guide rail and uninstallation platform for satellite antenna expandes do not conform to zero gravity environmental requirement to make satellite antenna influence driving moment in the expansion process, still influence the technical problem of the profile precision after satellite antenna expandes, the utility model discloses an air supporting guide rail cooperatees with the guide arm through air supporting bearing, fills high-pressure gas into air supporting bearing working end, and high-pressure gas plays the effect of support to air supporting bearing, and makes contactless slip between air supporting bearing and the guide arm, therefore frictional force between the two is minimum; the driving moment influence of the satellite antenna in the unfolding process is greatly reduced, and the mounting precision and the shape precision after unfolding of the satellite antenna are further improved.
Description
Technical Field
The utility model relates to a gravity uninstallation experimental apparatus, concretely relates to air supporting guide rail and uninstallation platform for gravity uninstallation experiment.
Background
The satellite is in a gravity-free state on the orbit, but the states of assembly, test and experiment on the ground are in a gravity environment, and with the increase of the size of the antenna, the influence of the ground gravity environment is increased along with the increase of the size of the antenna, and the influence of the gravity mainly comprises the following steps: first, the effect on drive torque during deployment; secondly, the installation precision of the satellite antenna is influenced; and thirdly, the influence on the surface accuracy of the satellite antenna after being unfolded and the like. Therefore, while the satellite antenna is developed, corresponding zero gravity environment simulation equipment needs to be manufactured, and the zero gravity environment simulation equipment comprises a guide rail and an unloading platform which are used for providing a zero gravity expansion simulation experiment for the satellite antenna and have extremely low friction force.
In the existing gravity unloading experiment, a guide rail for unfolding the satellite antenna is usually realized by adopting sliding between a rolling bearing and a guide rod, the rolling bearing is in direct contact with the guide rod, and during the experiment, under the action of gravity, friction force can be generated between the rolling bearing and the guide rod, so that the driving moment can be influenced, the installation precision of the satellite antenna can be influenced, and the shape precision of the unfolded satellite antenna can be influenced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses in aiming at solving the gravity uninstallation experiment that exists among the prior art, be used for guide rail and the uninstallation platform that the satellite antenna expanded not to be conform to zero gravity environment requirement to make the satellite antenna influence drive moment at the expansion in-process, still influence the technical problem of the shape precision after satellite antenna's the installation accuracy and the satellite antenna expansion, and provide an air supporting guide rail and uninstallation platform that is used for the gravity uninstallation experiment.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
an air supporting guide rail for gravity unloading experiments is characterized in that: comprises a guide rod, a C-shaped sliding frame which is sleeved on the guide rod and provided with an upward gap, and an air source;
at least three air bearing bearings are uniformly fixed on the inner wall of the C-shaped sliding frame around the circumferential direction of the C-shaped sliding frame, and an antenna lifting rope is arranged below the C-shaped sliding frame;
a gap is reserved between the air bearing and the guide rod;
the air bearing is connected with an air source through a vent pipe;
the air source supplies air for the air bearing.
Further, the air bearing is fixed on the inner wall of the C-shaped sliding frame through a first bolt;
and the first bolt penetrates through the C-shaped sliding frame and is fixedly connected with the air bearing.
Furthermore, the number of the air bearings is three, and the three air bearings are respectively a first air bearing, a second air bearing and a third air bearing.
Furthermore, the number of the vent pipes is three, namely a first vent pipe, a second vent pipe and a third vent pipe;
the first breather pipe is communicated with the gas transmission port of the first air bearing sequentially through two ports of the first three-way joint and two ports of the second three-way joint;
the third port of the first three-way joint is communicated with a gas transmission port of the second air bearing through a second vent pipe;
and a third port of the second three-way joint is communicated with a gas transmission port of a third air bearing through a third vent pipe.
Furthermore, a right-angle pipe joint is arranged between the second vent pipe and the second air bearing.
Further, the throttling port of the air bearing is positioned in the center of the air bearing;
the clearance between the air bearing and the guide rod is 12-8 mu m.
Based on foretell an air supporting guide rail for gravity uninstallation experiment, the utility model also provides an uninstallation platform for gravity uninstallation experiment, its special character lies in: the air floatation guide rail for the satellite antenna comprises a mounting bracket and the air floatation guide rail for the satellite antenna;
the mounting bracket is provided with a mounting platform;
the guide rod is arranged below the mounting platform through the mounting assembly;
the notch on the C-shaped sliding frame is used for avoiding the installation component;
the bottom of the C-shaped sliding frame is provided with two bulges;
a second bolt penetrates through the two bulges;
and the antenna lifting rope is arranged on the C-shaped sliding frame through a second bolt.
Furthermore, two ends of the guide rod are respectively provided with a stop dog for stopping the C-shaped sliding frame from slipping.
Furthermore, the number of the mounting assemblies is at least two, and at least two of the mounting assemblies are arranged close to two ends of the guide rod;
the mounting assembly comprises a screw and a nut;
one end of the screw rod is fixedly connected with the guide rod, and the other end of the screw rod penetrates through the mounting platform from bottom to top and then is in threaded connection with the nut.
Further, the air source is an air compressor.
The utility model has the advantages that:
1. the air floatation guide rail of the utility model is matched with the guide rod through the air floatation bearing, the high-pressure gas is filled into the working end of the air floatation bearing, the high-pressure gas plays a role of supporting the air floatation bearing, and the air floatation bearing and the guide rod slide in a non-contact way, so the friction force between the air floatation bearing and the guide rod is extremely small; the driving moment influence of the satellite antenna in the unfolding process is greatly reduced, and the mounting precision and the shape precision after unfolding of the satellite antenna are further improved.
2. The utility model discloses a first three way connection, second three way connection and right angle coupling are to air supporting bearing input high-pressure gas, avoid the breather pipe to tie a knot, have guaranteed the gaseous smoothness degree in the breather pipe for the motion of C type carriage is steady and not have the phenomenon of crawling, thereby reduces the error of experiment.
3. The utility model discloses well air supporting bearing's orifice is located its center for air supporting bearing has two-way load-carrying capacity and two-way rigidity, has improved air supporting guide rail's stability greatly.
4. The unloading platform of the utility model highly simulates the zero gravity environment, so that the C-shaped sliding frame has high motion precision and high motion speed; and because the air bearing and the guide rod slide in a non-contact way, the air movement viscosity between the air bearing and the guide rod is extremely low, the system basically has no heating phenomenon, can be used in a wider temperature range, and has no pollution to the environment.
Drawings
Fig. 1 is a schematic structural view of an air floatation guide rail and an unloading platform for gravity unloading experiments according to the present invention;
FIG. 2 is a bottom view of FIG. 1;
FIG. 3 is a side view of FIG. 1;
fig. 4 is a partial enlarged view of the air-float guide rail and the unloading platform for gravity unloading experiment of the present invention;
fig. 5 is a schematic view of the flow direction of the gas in the present invention.
Reference numerals:
1-mounting component, 11-screw, 12-nut;
2-mounting a platform;
3-guide rod, 31-stop block;
4-C type sliding frame, 41-notch, 42-bulge;
5-air bearing, 51-first air bearing, 52-second air bearing, 53-third air bearing, 54-orifice;
6-antenna lifting rope;
7-breather pipe, 71-first tee joint, 72-second tee joint, 73-right angle pipe joint, 74-first breather pipe, 75-second breather pipe, 76-third breather pipe;
8-first bolt.
Detailed Description
To make the objects, advantages and features of the present invention clearer, the following detailed description of the air floating guide rail and unloading platform for gravity unloading experiment provided by the present invention is made with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following detailed description. It should be noted that: the drawings are in a very simplified form and are not to precise scale, and are provided solely for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention; second, the structures shown in the drawings are often part of actual structures.
The utility model relates to an air-float guide rail and an unloading platform for gravity unloading experiment, wherein the air-float guide rail is arranged on the unloading platform; as shown in fig. 1 and 2, the unloading platform provided with the air-floating guide rail includes a guide rod 3 disposed below the mounting platform 2 through a plurality of mounting assemblies 1; the number of the installation components 1 is selected according to the length of the guide rod 3, the guide rod 3 is sleeved with a C-shaped sliding frame 4 with an upward gap, the gap 41 is used for avoiding the installation components 1, and three air bearings 5, namely a first air bearing 51, a second air bearing 52 and a third air bearing 53, are uniformly fixed on the inner wall of the C-shaped sliding frame 4 around the circumferential direction. Gaps are reserved between the three air bearings 5 and the guide rod 3, the gaps are controlled within the range of 12-8 mu m, and the rigidity is best.
As shown in fig. 3, three air bearings 5 are fixed on the inner wall of the C-shaped sliding frame 4 through first bolts 8; the first bolt 8 penetrates through the C-shaped sliding frame 4 and is fixedly connected with the air bearing 5.
The bottom of the outer wall of the C-shaped sliding frame 4 is provided with two bulges 42; a second bolt for installing the antenna lifting rope 6 is arranged on the two bulges 42 in a penetrating manner, and the antenna lifting rope 6 is used for lifting the satellite antenna to be unfolded.
As shown in fig. 4, gaps exist between the three air bearings 5 and the guide rod 3; the air bearing 5 is connected with an air source through a breather pipe 7, so that the air source supplies air to the air bearing 5. The breather pipe 7 has three breather pipes, namely a first breather pipe 74, a second breather pipe 75 and a third breather pipe 76; the three breather pipes 7 are communicated with the three air-floating bearings through three joints; the three joints are respectively a first three-way joint 71, a second three-way joint 72 and a right-angle pipe joint 73; the first vent pipe 74 is communicated with the gas transmission port of the first air bearing 51 sequentially through two ports of the first three-way joint 71 and two ports of the second three-way joint 72; the third port of the first three-way joint 71 is communicated with one end of the right-angle pipe joint 73 through a second vent pipe 75, and the other end of the right-angle pipe joint 73 is communicated with the air delivery port of the second air bearing 52. The third port of the second three-way joint 72 is communicated with the air delivery port of the third air bearing 53 through a third air delivery pipe 76.
The air source is an air compressor.
Thus, the air compressor compresses air and delivers the compressed air to the first air bearing 51, the second air bearing 52 and the third air bearing 53 through the first air pipe 74, the second air pipe 75, the third air pipe 76, the first three-way joint 71, the second three-way joint 72 and the right-angle pipe joint 73, respectively.
As shown in fig. 5, compressed high-pressure air enters from the air delivery port of the air bearing, and enters between the air bearing 5 and the contact surface of the guide rod through the throttle hole 54 at the center of the air bearing to form an air film, and because the air film is high-pressure air, the air film plays a role of supporting the air bearing 5 and the annular sliding bracket 4 connected with the air bearing 5, and is continuously inflated, so that the air film is continuously not in contact; the friction force is greatly reduced. The throttle hole 54 is located in the center of the air bearing 5, so that the air bearing 5 has bidirectional load bearing capacity and bidirectional rigidity, and the stability of the air-bearing guide rail is good. The bearing capacity is an important parameter of the air floatation guide rail, and the bearing capacity is different due to different air supply pressures P.
In order to adjust the height of the guide rod 3, the installation component 1 of the utility model at least comprises two installation components which are arranged near the two ends of the guide rod 3; the mounting assembly 1 comprises a screw 11 and a nut 12; one end of the screw rod 11 is fixedly connected with the guide rod 3, and the other end of the screw rod penetrates through the mounting platform 2 from bottom to top and is in threaded connection with the nut 12; two ends of the guide rod 3 are respectively provided with a stop 31 for stopping the C-shaped sliding frame 4 from slipping off. Therefore, the screw rod 11 is rotated when the height and the balance degree of the guide rod 3 are adjusted, and the nut 12 is used for locking after the adjustment is finished, so that the guide rod is prevented from sliding off.
Claims (10)
1. The utility model provides an air supporting guide rail for gravity uninstallation experiment which characterized in that: comprises a guide rod (3), a C-shaped sliding frame (4) which is sleeved on the guide rod (3) and provided with an upward gap, and an air source;
at least three air bearing bearings (5) are uniformly fixed on the inner wall of the C-shaped sliding frame (4) around the circumferential direction of the C-shaped sliding frame, and an antenna lifting rope (6) is arranged below the C-shaped sliding frame (4);
a gap is reserved between the air bearing (5) and the guide rod (3);
the air bearing (5) is connected with an air source through a vent pipe (7);
the air source supplies air for the air bearing (5).
2. The air bearing guide rail for gravity unloading experiment as claimed in claim 1, wherein: the air bearing (5) is fixed on the inner wall of the C-shaped sliding frame (4) through a first bolt (8); the first bolt (8) penetrates through the C-shaped sliding frame (4) and is fixedly connected with the air bearing (5).
3. The air bearing guide rail for gravity unloading experiment as claimed in claim 1 or 2, wherein: the number of the air bearings (5) is three, and the air bearings are respectively a first air bearing (51), a second air bearing (52) and a third air bearing (53).
4. The air bearing guide rail for gravity unloading experiment as claimed in claim 3, wherein: the number of the vent pipes (7) is three, namely a first vent pipe (74), a second vent pipe (75) and a third vent pipe (76);
the first vent pipe (74) is communicated with the gas transmission port of the first air bearing (51) sequentially through two ports of the first three-way joint (71) and two ports of the second three-way joint (72);
the third port of the first three-way joint (71) is communicated with the air delivery port of the second air bearing (52) through a second air vent pipe (75);
and a third port of the second three-way joint (72) is communicated with an air delivery port of a third air bearing (53) through a third vent pipe (76).
5. The air bearing guide rail for gravity unloading experiment as claimed in claim 4, wherein: and a right-angle pipe joint (73) is also arranged between the second vent pipe (75) and the second air bearing (52).
6. The air bearing guide rail for gravity unloading experiment as claimed in claim 5, wherein: the air source is an air compressor.
7. The air bearing guide rail for gravity unloading experiment as claimed in claim 1, wherein: the throttling opening (54) of the air bearing (5) is positioned in the center of the air bearing (5);
the clearance between the air bearing (5) and the guide rod (3) is 12-8 mu m.
8. The utility model provides an uninstallation platform for gravity uninstallation experiment which characterized in that: the air floatation guide rail for the gravity unloading experiment comprises a mounting bracket and the air floatation guide rail for the gravity unloading experiment according to any one of claims 1 to 6;
the mounting bracket is provided with a mounting platform (2);
the guide rod (3) is arranged below the mounting platform (2) through the mounting component (1);
a notch (41) on the C-shaped sliding frame (4) is used for avoiding the mounting assembly (1);
two bulges (42) are arranged at the bottom of the C-shaped sliding frame (4);
a second bolt penetrates through the two bulges (42);
and the antenna lifting rope (6) is arranged on the C-shaped sliding frame (4) through a second bolt.
9. An unloading platform for gravity unloading experiments according to claim 8, wherein: and two ends of the guide rod (3) are respectively provided with a stop block (31) for stopping the C-shaped sliding frame (4) from slipping.
10. An unloading platform for gravity unloading experiments according to claim 9, wherein: the number of the mounting assemblies (1) is at least two, and at least two mounting assemblies (1) are arranged close to two ends of the guide rod (3);
the mounting assembly (1) comprises a screw (11) and a nut (12);
one end of the screw rod (11) is fixedly connected with the guide rod (3), and the other end of the screw rod penetrates through the mounting platform (2) from bottom to top and then is in threaded connection with the nut (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020651439.1U CN212250826U (en) | 2020-04-26 | 2020-04-26 | Air floatation guide rail and unloading platform for gravity unloading experiment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020651439.1U CN212250826U (en) | 2020-04-26 | 2020-04-26 | Air floatation guide rail and unloading platform for gravity unloading experiment |
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| Publication Number | Publication Date |
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| CN212250826U true CN212250826U (en) | 2020-12-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114408230A (en) * | 2022-01-20 | 2022-04-29 | 浙江工商大学 | Gravity unloading system of multiple following movable air-floating trolleys |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114408230A (en) * | 2022-01-20 | 2022-04-29 | 浙江工商大学 | Gravity unloading system of multiple following movable air-floating trolleys |
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