CN113212807A - Control moment gyro frame rotor assembly for micro-nano satellite - Google Patents
Control moment gyro frame rotor assembly for micro-nano satellite Download PDFInfo
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- CN113212807A CN113212807A CN202110348506.1A CN202110348506A CN113212807A CN 113212807 A CN113212807 A CN 113212807A CN 202110348506 A CN202110348506 A CN 202110348506A CN 113212807 A CN113212807 A CN 113212807A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
- B64G1/24—Guiding or controlling apparatus, e.g. for attitude control
- B64G1/28—Guiding or controlling apparatus, e.g. for attitude control using inertia or gyro effect
- B64G1/286—Guiding or controlling apparatus, e.g. for attitude control using inertia or gyro effect using control momentum gyroscopes (CMGs)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/10—Artificial satellites; Systems of such satellites; Interplanetary vehicles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
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Abstract
The invention relates to a control moment gyro frame rotor assembly for a micro/nano satellite, which comprises: the device comprises a rotating mass body, a first angular contact ball bearing, a second angular contact ball bearing, a first bearing cover, a second bearing cover, a pre-tightening screw, a frame, a high-speed motor rotor and a high-speed motor stator; the rotating mass body, the first angular contact ball bearing, the second angular contact ball bearing, the first bearing cover, the second bearing cover and the frame form a closed force system, and the pre-tightening screw applies pre-tightening force to the closed force system through the bearing cover. The control moment gyro frame rotor assembly reduces the number of parts and connection links, saves the overall weight of the assembly, simultaneously reduces the wind resistance influence, shortens the time of the rotating mass body reaching the nominal rotating speed, realizes the function of controlling the moment gyro to rapidly output the moment to the outside, and solves the problem of realizing rapid and large-scale attitude maneuver of a micro-nano satellite.
Description
Technical Field
The invention relates to a control moment gyro frame rotor assembly for a micro-nano satellite, and belongs to the technical field of control moment gyros for micro-nano satellites.
Background
The structure types of the control moment gyroscope commonly used at present are two types: a common top-type structure and a cantilever-type structure. The large and medium control force gyroscope mainly adopts a common gyroscope type structure, and the cantilever type structure is mainly applied to the small and medium control moment gyroscope.
The common gyro structure has the advantages of strong resistance to mechanical environment and suitability for realizing the function of infinite turning angle of the frame, but the structure size is slightly larger. The cantilever type structure has the advantages of compact structure, small volume and light weight, but has slightly poor resistance to mechanical environment. The cantilever type structure needs to be provided with a large frame shaft system to support the rotating mass body, so that the cantilever type structure is not suitable for the control moment gyroscope for the micro-nano satellite.
Disclosure of Invention
The technical problems solved by the invention are as follows: the control moment gyro frame rotor assembly for the micro-nano satellite can realize fast and large-scale attitude maneuver of the whole satellite.
The technical scheme of the invention is as follows: a control moment gyro frame rotor assembly for a micro-nano satellite comprises: the device comprises a rotating mass body (1), a first angular contact ball bearing (2), a second angular contact ball bearing (6), a first bearing cover (3), a second bearing cover (5), a pre-tightening screw (4), a frame (7), a high-speed motor rotor (8) and a high-speed motor stator (9);
rotating mass body (1) comprising: wheel rim and spoke, central rotating shaft; the central rotating shaft is connected with the inner side of the wheel rim through spokes distributed along the circumferential direction, and the wheel rim and the central rotating shaft are coaxial;
a rim comprising an outer rim and an inner rim; the outer layer wheel rim and the inner layer wheel rim are both coaxial hollow cylinders; a high-speed motor rotor (8) mounting space is formed between the outer layer wheel rim and the inner layer wheel rim;
a frame (7) comprising: the motor stator mounting structure comprises a U-shaped support (71), a first bearing mounting seat (72), a connecting beam (73), a motor stator mounting support (74) and a second bearing mounting seat (75);
one end of the U-shaped support (71) is provided with a first bearing mounting seat (72), and the first bearing mounting seat (72) is connected with a motor stator mounting support (74) through a connecting beam (73);
a second bearing mounting seat (75) is arranged at the other end of the U-shaped bracket;
one end of a central rotating shaft of the rotating mass body (1) is connected with a first bearing mounting seat (72) through a first angular contact ball bearing (2); the other end of the central rotating shaft of the rotating mass body (1) is connected with a second bearing mounting seat (75) through a second angular contact ball bearing (6);
the center of one side of the first bearing cover (3) is provided with a cylindrical boss which is in contact with the outer ring of the first angular contact ball bearing (2), and the edge of one side of the first bearing cover (3) is connected with the first bearing mounting seat (72) through a pre-tightening screw (4), so that the pre-tightening function of the first angular contact ball bearing (2) is realized;
the center of one side of the second bearing cover (5) is provided with a cylindrical boss which is contacted with the outer ring of the second angular contact ball bearing (6), and the edge of one side of the second bearing cover (5) is connected with the second bearing mounting seat (75) through a pre-tightening screw (4) to realize the pre-tightening function of the second angular contact ball bearing (6);
the high-speed motor rotor (8) can be arranged in the installation space of the high-speed motor rotor (8), and the high-speed motor rotor (8) is a metal ring;
the high-speed motor stator (9) is arranged on the motor stator mounting bracket (74); the motor stator mounting bracket (74) is coaxial with the high-speed motor stator (9) and the high-speed motor rotor (8).
Preferably, a rotating mass body (1) providing a moment of inertia to establish angular momentum; the high-speed motor rotor (8) and the high-speed motor stator (9) provide driving torque for the rotating mass body (1) to ensure that the working rotating speed of the rotating mass body (1) reaches 8000r/min and 16000 r/min; the high-speed rotor shafting is composed of the first angular contact ball bearing (2), the second angular contact ball bearing (6), the first bearing cover (3), the second bearing cover (5), the pre-tightening screw (4) and the frame (7) and provides support for the rotating mass body (1).
Preferably, the rotating mass body (1), the first angular contact ball bearing (2), the second angular contact ball bearing (6) and the frame (7) form a closed force system.
Preferably, the nominal rotating speed of the rotating mass body (1) and the high-speed motor rotor (8) is 8000 r/min.
Preferably, the integrated motor rotor assembly reduces the number of parts and connection links, saves the overall weight of the assembly, reduces the influence of wind resistance, shortens the time for the rotating mass body (1) to reach the nominal rotating speed, and realizes the function of controlling the torque gyro to rapidly output torque to the outside.
Preferably, the high-speed shafting is simplified in design, an external oil supply system is omitted, the two-year service life of the bearing can be ensured by adding base oil into the first angular contact ball bearing (2) and the second angular contact ball bearing (6) and controlling the oil content of the cages of the first angular contact ball bearing (2) and the second angular contact ball bearing (6), the high-speed shafting can be rapidly assembled, and the weight of the assembly is reduced.
Preferably, when the frame rotor assembly is assembled, the high-speed motor rotor (8) is firstly installed into the rotating mass body (1) and is glued; then a high-speed motor stator (9) is arranged in the rotating mass body (1), the high-speed motor rotor (8) and the high-speed motor stator (9) are arranged in a frame (7) together through radial grooves of a first bearing mounting seat (72) and a second bearing mounting seat (75), and the high-speed motor stator (9) is fixed on a motor stator mounting bracket (74) through screws; the first angular contact ball bearing (2) is arranged in a first bearing mounting seat (72), the second angular contact ball bearing (6) is arranged in a second bearing mounting seat (75), the two bearings are arranged in a face-to-face mode, one end of a central rotating shaft of the rotating mass body (1) is arranged in an inner ring of the first angular contact ball bearing (2), and the other end of the central rotating shaft of the rotating mass body (1) is arranged in an inner ring of the second angular contact ball bearing (6); and respectively installing the first bearing cover (3) and the second bearing cover (5) on the outer sides of the first bearing installation seat (72) and the second bearing installation seat (75), and applying pretightening force to the bearing through a pretightening screw (4).
Preferably, the motor stator mounting bracket (74) is arc-shaped with an arc center angle of opening of 270 degrees; two adjacent connecting beams form an included angle of 90 degrees.
Preferably, the frame (7) is a U-shaped structure made of 9Cr18 stainless steel as shown in fig. 2, and is integrally designed with the first bearing mounting seat (72), the second bearing mounting seat (75) and the motor stator mounting bracket (74), so that the heat conduction and heat dissipation capacity of the structure is improved.
Compared with the prior art, the invention has the advantages that:
(1) the invention relates to a control moment gyro frame rotor assembly for a micro-nano satellite, which adopts a pair of angular contact ball bearings which are installed face to serve as a rotary support of a rotary mass body, and realizes the space environment lubrication service life of a bearing for 2 years by adding bearing base oil and controlling the oil content of a bearing retainer under the condition of not arranging an oil supply system.
(2) The invention relates to a motor rotor assembly which integrates a high-speed motor rotor and a rotating mass body.
(3) The integrated frame is designed to realize the precise support of the high-speed rotor assembly including the angular contact ball bearing, the rotating mass body, the high-speed motor stator and the like.
(4) The invention provides a control moment gyro frame rotor assembly for a micro-nano satellite, which adopts a pair of angular contact ball bearings installed face to serve as a rotary support of a rotary mass body, realizes the space environment lubrication service life of the bearing for 2 years by adding base oil and controlling the oil content of a bearing retainer under the condition of not arranging an oil supply system, arranges a high-speed motor rotor in the rotary mass body to form an integrated motor rotor assembly, designs an integrated frame to realize the precise support of the high-speed rotor assembly comprising the angular contact ball bearings, the rotary mass body, a high-speed motor stator and the like, and can ensure that the whole satellite realizes the rapid and large-scale attitude maneuver.
Drawings
FIG. 1 is a perspective view of a control moment gyro frame rotor assembly for a micro/nano satellite according to the invention;
FIG. 2 is a perspective view of the frame of the present invention;
fig. 3 is a perspective view of the rotating mass body of the present invention.
FIG. 4 is a cross-sectional view of a rotating mass body of the invention
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
With the maturity and development of the micro-nano satellite technology, the application occasions of the micro-nano satellite are more and more, the load carried by the satellite is more and more complex, the requirement on the stability index of the satellite is higher and higher, and the fine control can be completed only by adopting a device based on angular momentum exchange. The control moment gyroscope has the advantages of large and continuously adjustable output moment, high energy efficiency ratio, no fuel consumption and no pollution, and is a necessary choice for a new generation of fast maneuvering, high-precision and high-stability spacecraft platform. The control moment gyroscope is used as an attitude actuating mechanism of the micro-nano satellite, so that the whole satellite can realize quick and large-range attitude maneuver.
The frame rotor assembly is a key component for controlling the output angular momentum of the moment gyroscope, and is mainly characterized by light weight, large output angular momentum, simple structure and rapid assembly. The invention mainly provides a control moment gyro frame rotor assembly for a micro-nano satellite aiming at the characteristics of a control moment gyro for the micro-nano satellite, completes the development of an engineering prototype and passes an identification-level force-thermal environment test.
As shown in fig. 1, the control moment gyro frame rotor assembly for a micro/nano satellite of the present invention includes: the device comprises a rotating mass body (1), a first angular contact ball bearing (2), a second angular contact ball bearing (6), a first bearing cover (3), a second bearing cover (5), a pre-tightening screw (4), a frame (7), a high-speed motor rotor (8) and a high-speed motor stator (9);
rotating mass body (1), as shown in fig. 3 and 4, comprising: wheel rim and spoke, central rotating shaft; the central rotating shaft is connected with the inner side of the wheel rim through spokes distributed along the circumferential direction, and the wheel rim and the central rotating shaft are coaxial; the outer circular surface of one end of the central rotating shaft is matched with the inner ring of the first angular contact ball bearing (2), so that the preferable bilateral gap is ensured to be 1-3 mu m; the outer circle surface of the other end of the central rotating shaft is matched with the inner ring of the second angular contact ball bearing (6), so that the preferable bilateral gap is ensured to be 1-3 mu m;
a rim comprising an outer rim and an inner rim; the outer layer wheel rim and the inner layer wheel rim are both coaxial hollow cylinders; a high-speed motor rotor (8) mounting space is formed between the outer layer wheel rim and the inner layer wheel rim;
a frame (7) comprising: the motor stator mounting structure comprises a U-shaped support (71), a first bearing mounting seat (72), a connecting beam (73), a motor stator mounting support (74) and a second bearing mounting seat (75); FIG. 2 is a perspective view of the frame of the present invention;
one end of the U-shaped support (71) is provided with a first bearing mounting seat (72), and the first bearing mounting seat (72) is connected with a motor stator mounting support (74) through a connecting beam (73); the motor stator mounting bracket (74) is in an arc shape with an arc center angle of 270 degrees and an opening; two adjacent connecting beams form a 90-degree included angle;
a second bearing mounting seat (75) is arranged at the other end of the U-shaped bracket;
one end of a central rotating shaft of the rotating mass body (1) is connected with an inner hole of the first bearing mounting seat (72) through an outer ring of the first angular contact ball bearing (2), and an optimal bilateral gap is guaranteed to be 3-5 mu m; the other end of a central rotating shaft of the rotating mass body (1) is connected with an inner hole of a second bearing mounting seat (75) through an outer ring of a second angular contact ball bearing (6), and an optimal bilateral gap is guaranteed to be 3-5 mu m;
the center of one side of the first bearing cover (3) is provided with a cylindrical boss which is in contact with the outer ring of the first angular contact ball bearing (2), and the edge of one side of the first bearing cover (3) is connected with the first bearing mounting seat (72) through a pre-tightening screw (4), so that the pre-tightening function of the first angular contact ball bearing (2) is realized;
the center of one side of the second bearing cover (5) is provided with a cylindrical boss which is contacted with the outer ring of the second angular contact ball bearing (6), and the edge of one side of the second bearing cover (5) is connected with the second bearing mounting seat (75) through a pre-tightening screw (4) to realize the pre-tightening function of the second angular contact ball bearing (6);
the high-speed motor rotor (8) can be arranged in the installation space of the high-speed motor rotor (8), and the high-speed motor rotor (8) is a metal ring;
the high-speed motor stator (9) is arranged on the motor stator mounting bracket (74); the motor stator mounting bracket (74) is coaxial with the high-speed motor stator (9) and the high-speed motor rotor (8).
The preferred scheme is as follows: a rotating mass body (1) providing a moment of inertia to establish angular momentum; the high-speed motor rotor (8) and the high-speed motor stator (9) provide driving torque for the rotating mass body (1) to ensure that the working rotating speed of the rotating mass body (1) reaches 8000r/min and 16000 r/min; the high-speed rotor shafting is composed of the first angular contact ball bearing (2), the second angular contact ball bearing (6), the first bearing cover (3), the second bearing cover (5), the pre-tightening screw (4) and the frame (7) and provides support for the rotating mass body (1).
The preferred scheme is as follows: the rotating mass body (1), the first angular contact ball bearing (2), the second angular contact ball bearing (6) and the frame (7) form a closed force system.
The preferred scheme is as follows: the nominal rotating speed of the rotating mass body (1) and the high-speed motor rotor (8) is preferably 8000 r/min.
The preferred scheme is as follows: the integrated motor rotor assembly reduces the number of parts and connection links, saves the overall weight of the assembly, reduces the wind resistance influence, shortens the time for the rotating mass body (1) to reach the nominal rotating speed, and realizes the function of controlling the torque gyro to rapidly output torque to the outside.
The preferred scheme is as follows: the high-speed shafting is simplified in design, an external oil supply system is omitted, the two-year service life of the bearing can be ensured by adding base oil into the first angular contact ball bearing (2) and the second angular contact ball bearing (6) and controlling the oil content of the first angular contact ball bearing (2) and the second angular contact ball bearing (6) retainer, the high-speed shafting can be rapidly assembled, and the weight of the assembly is reduced.
The preferred scheme is as follows: when the frame rotor assembly is assembled, firstly, a high-speed motor rotor (8) is arranged in the rotating mass body (1) and is glued; then a high-speed motor stator (9) is arranged in the rotating mass body (1), the high-speed motor rotor (8) and the high-speed motor stator (9) are arranged in a frame (7) together through radial grooves of a first bearing mounting seat (72) and a second bearing mounting seat (75), and the high-speed motor stator (9) is fixed on a motor stator mounting bracket (74) through screws; the first angular contact ball bearing (2) is arranged in a first bearing mounting seat (72), the second angular contact ball bearing (6) is arranged in a second bearing mounting seat (75), the two bearings are arranged in a face-to-face mode, one end of a central rotating shaft of the rotating mass body (1) is arranged in an inner ring of the first angular contact ball bearing (2), and the other end of the central rotating shaft of the rotating mass body (1) is arranged in an inner ring of the second angular contact ball bearing (6); and respectively installing the first bearing cover (3) and the second bearing cover (5) on the outer sides of the first bearing installation seat (72) and the second bearing installation seat (75), and applying pretightening force to the bearing through a pretightening screw (4).
The preferred scheme is as follows: the rotary mass body (1), preferably a 2Cr13 stainless steel wheel body structure, comprises a wheel rim, a spoke and a central rotating shaft, wherein the central rotating shaft and the wheel rim are connected by 5 long square cylindrical spokes evenly distributed in the circumference to realize large inertia/mass ratio, the cross section of the rotary mass body (1) passing through the spoke is I-shaped, and fig. 4 is a cross section of the rotary mass body. In order to improve the operation stability of the frame rotor assembly, the following design indexes of the rotating mass body are controlled: as shown in fig. 4, the concentricity of the cylindrical surface 1 and the cylindrical surface 2 is preferably Φ 3 μm, the perpendicularity of the side surface 3 and the cylindrical surface 1 is preferably 3 μm, the perpendicularity of the side surface 4 and the cylindrical surface 2 is preferably 3 μm, the perpendicularity of the side surface 5 and the cylindrical surface 1 is preferably 3 μm, the perpendicularity of the side surface 6 and the cylindrical surface 2 is preferably 3 μm, and the concentricity of the cylindrical surface 7 and the cylindrical surfaces 1 and 2 is preferably Φ 5 μm; one side of the wheel rim is provided with a groove which is a mounting space of the high-speed motor rotor to form an integrated motor rotor component. Because the high-strength stainless steel material is adopted as the material of the wheel body, the wheel body can still keep higher structural stability at the rotating speed of 8000r/min, even 16000 r/min.
The preferred scheme is as follows: the first bearing cover (3) is made of 9Cr18 stainless steel, and has good thermal matching performance with the first bearing mounting seat (72) and the first angular contact ball bearing (2).
The preferred scheme is as follows: the second bearing cover (5) is preferably made of 9Cr18 stainless steel, and has good thermal matching performance with the second bearing mounting seat (75) and the second angular contact ball bearing (6).
The preferred scheme is as follows: the frame (7) is preferably of a U-shaped structure made of 9Cr18 stainless steel, and is integrally designed with the first bearing mounting seat (72), the second bearing mounting seat (75) and the motor stator mounting bracket (74), so that the heat conduction and heat dissipation capacity of the structure is improved; in order to ensure the stable operation of the bearing, as shown in fig. 2, which is a cross-sectional view of the frame (7), the relative concentricity of the inner hole cylindrical surface of the first bearing installation seat (72) and the inner hole cylindrical surface of the second bearing installation seat (75) is designed to be preferably phi 3 mu m; in order to ensure the accurate loading of the first angular contact ball bearing (2) by the first bearing gland (3), the verticality of the design side surface relative to the cylindrical surface is preferably 3 mu m; in order to ensure the accurate loading of the second angular contact ball bearing (6) by the second bearing gland (5), the verticality of the side surface relative to the cylindrical surface is preferably designed to be 3 mu m; the distance between the first bearing mounting seat (72) and the second bearing mounting seat (75) is preferably 38.5mm, and the support reaction force generated by the maximum gyro moment generated when the frame rotor assembly works on the bearing can be ensured to be within the range allowed by the design life of the bearing.
The preferred scheme is as follows: the high-speed motor rotor (8) is nested in the rotating mass body (1) to form an integrated motor rotor assembly, so that the number of parts and the connection link are reduced, the overall weight of the assembly is saved, the wind resistance influence is reduced, the time for the rotating mass (1) to reach the nominal rotating speed is shortened, and the function of controlling the torque gyro to rapidly output torque to the outside is realized.
The frame is an integrally designed frame (7), and one side of the frame is provided with a motor stator mounting bracket (74) with a circumferential angle of 270 degrees for fixing a high-speed motor stator (9); the radial positions of the first bearing mounting seat (72) and the second bearing mounting seat (75) on the frame (7) are provided with grooves, and the grooves can ensure that the rotating mass body (1) is smoothly arranged in the frame (7).
When the frame rotor assembly is assembled, firstly, a high-speed motor rotor (8) is arranged in the rotating mass body (1) and is glued; then a high-speed motor stator (9) is arranged in the rotating mass body (1), the high-speed motor rotor (8) and the high-speed motor stator (9) are arranged in a frame (7) together through radial grooves of a first bearing mounting seat (72) and a second bearing mounting seat (75), and the high-speed motor stator (9) is fixed on a motor stator mounting bracket (74) through screws; the first angular contact ball bearing (2) is arranged in a first bearing mounting seat (72), the second angular contact ball bearing (6) is arranged in a second bearing mounting seat (75), the two bearings are arranged in a face-to-face mode, one end of a central rotating shaft of the rotating mass body (1) is arranged in an inner ring of the first angular contact ball bearing (2), and the other end of the central rotating shaft of the rotating mass body (1) is arranged in an inner ring of the second angular contact ball bearing (6); and respectively installing the first bearing cover (3) and the second bearing cover (5) on the outer sides of the first bearing installation seat (72) and the second bearing installation seat (75), and applying pretightening force to the bearing through a pretightening screw (4).
The high-speed shafting is simplified in design, an external oil supply system is omitted, the two-year service life of the bearing can be ensured by adding base oil into the first angular contact ball bearing (2) and the second angular contact ball bearing (6) and controlling the oil content of the first angular contact ball bearing (2) and the second angular contact ball bearing (6) retainer, the high-speed shafting can be rapidly assembled, and the weight of the assembly is reduced.
The frame rotor assembly adopts a double-end supporting structural form to improve the supporting rigidity of a shafting, and the frame rotor assembly is composed of a rotating mass body (1), a first angular contact ball bearing (2), a second angular contact ball bearing (6), a first bearing cover (3), a second bearing cover (5), a pre-tightening screw (4), a frame (7), a high-speed motor rotor (8) and a high-speed motor stator (9), wherein the frame (7), the first angular contact ball bearing (2), the second angular contact ball bearing (6) and the rotating mass body (1) form a closed force system, and the bearing is positioned and pre-tightened by the first bearing cover (3) and the second bearing cover (5).
The invention realizes the further proposal of improving the operation stability of the frame rotor component: the first angular contact ball bearing (2) and the second angular contact ball bearing (6) are loaded by repairing and grinding the first bearing cover (3) and the second bearing cover (5), the preloading amount is 15N, and the consistent protrusion amount of the pressing covers is ensured as much as possible; a cylindrical surface at one end of a central rotating shaft of the rotating mass body (1) is matched with an inner ring of the first angular contact ball bearing (2) to ensure that a bilateral gap is 1-3 mu m; the cylindrical surface at the other end of the central rotating shaft of the rotating mass body (1) is matched with the inner ring of the second angular contact ball bearing (6) to ensure that the gap between two sides is 1-3 mu m; the inner hole of the first bearing mounting seat (72) is matched with the outer ring of the first angular contact ball bearing (2) to ensure that the gap between the two sides is 3-5 mu m; the second bearing mounting seat (75) is matched with the outer ring of the second angular contact ball bearing (6) to ensure that the gap between the two sides is 3-5 mu m; satisfying the preferable constraint conditions described above can further improve the operational stability of the frame rotor.
According to the control moment gyro frame rotor assembly for the micro-nano satellite, a pair of angular contact ball bearings are installed face to serve as a rotary support of a rotary mass body, and under the condition that an oil supply system is not arranged, the lubricating service life of a bearing in a space environment for 2 years is realized by adding bearing base oil and controlling the oil content of a bearing retainer; in addition, the high-speed motor rotor is arranged in the rotating mass body to form an integrated motor rotor assembly.
The integrated frame is designed to realize the precise support of the high-speed rotor assembly including the angular contact ball bearing, the rotating mass body, the high-speed motor stator and the like; the invention also provides a control moment gyro frame rotor assembly for the micro-nano satellite, which adopts a pair of angular contact ball bearings installed face to serve as a rotary support of a rotary mass body, realizes the lubricating service life of the bearing in a space environment for 2 years by adding base oil and controlling the oil content of a bearing retainer under the condition of not arranging an oil supply system, arranges a high-speed motor rotor in the rotary mass body to form an integrated motor rotor assembly, designs an integrated frame to realize the precise support of the high-speed rotor assembly comprising the angular contact ball bearings, the rotary mass body, a high-speed motor stator and the like, and can ensure that the whole satellite realizes the rapid and large-scale attitude maneuver.
Claims (9)
1. A control moment gyro frame rotor assembly for a micro-nano satellite is characterized by comprising: the device comprises a rotating mass body (1), a first angular contact ball bearing (2), a second angular contact ball bearing (6), a first bearing cover (3), a second bearing cover (5), a pre-tightening screw (4), a frame (7), a high-speed motor rotor (8) and a high-speed motor stator (9);
rotating mass body (1) comprising: wheel rim and spoke, central rotating shaft; the central rotating shaft is connected with the inner side of the wheel rim through spokes distributed along the circumferential direction, and the wheel rim and the central rotating shaft are coaxial;
a rim comprising an outer rim and an inner rim; the outer layer wheel rim and the inner layer wheel rim are both coaxial hollow cylinders; a high-speed motor rotor (8) mounting space is formed between the outer layer wheel rim and the inner layer wheel rim;
a frame (7) comprising: the motor stator mounting structure comprises a U-shaped support (71), a first bearing mounting seat (72), a connecting beam (73), a motor stator mounting support (74) and a second bearing mounting seat (75);
one end of the U-shaped support (71) is provided with a first bearing mounting seat (72), and the first bearing mounting seat (72) is connected with a motor stator mounting support (74) through a connecting beam (73);
a second bearing mounting seat (75) is arranged at the other end of the U-shaped bracket;
one end of a central rotating shaft of the rotating mass body (1) is connected with a first bearing mounting seat (72) through a first angular contact ball bearing (2); the other end of the central rotating shaft of the rotating mass body (1) is connected with a second bearing mounting seat (75) through a second angular contact ball bearing (6);
the center of one side of the first bearing cover (3) is provided with a cylindrical boss which is in contact with the outer ring of the first angular contact ball bearing (2), and the edge of one side of the first bearing cover (3) is connected with the first bearing mounting seat (72) through a pre-tightening screw (4), so that the pre-tightening function of the first angular contact ball bearing (2) is realized;
the center of one side of the second bearing cover (5) is provided with a cylindrical boss which is contacted with the outer ring of the second angular contact ball bearing (6), and the edge of one side of the second bearing cover (5) is connected with the second bearing mounting seat (75) through a pre-tightening screw (4) to realize the pre-tightening function of the second angular contact ball bearing (6);
the high-speed motor rotor (8) can be arranged in the installation space of the high-speed motor rotor (8), and the high-speed motor rotor (8) is a metal ring;
the high-speed motor stator (9) is arranged on the motor stator mounting bracket (74); the motor stator mounting bracket (74) is coaxial with the high-speed motor stator (9) and the high-speed motor rotor (8).
2. The control moment gyro frame rotor assembly for the micro-nano satellite according to claim 1, characterized in that: a rotating mass body (1) providing a moment of inertia to establish angular momentum; the high-speed motor rotor (8) and the high-speed motor stator (9) provide driving torque for the rotating mass body (1) to ensure that the working rotating speed of the rotating mass body (1) reaches 8000r/min and 16000 r/min; the high-speed rotor shafting is composed of the first angular contact ball bearing (2), the second angular contact ball bearing (6), the first bearing cover (3), the second bearing cover (5), the pre-tightening screw (4) and the frame (7) and provides support for the rotating mass body (1).
3. The control moment gyro frame rotor assembly for the micro-nano satellite according to claim 1, characterized in that: the rotating mass body (1), the first angular contact ball bearing (2), the second angular contact ball bearing (6) and the frame (7) form a closed force system.
4. The control moment gyro frame rotor assembly for the micro-nano satellite according to claim 1, characterized in that: the nominal rotating speed of the rotating mass body (1) and the high-speed motor rotor (8) is 8000 r/min.
5. The control moment gyro frame rotor assembly for the micro-nano satellite according to claim 1, characterized in that: the integrated motor rotor assembly reduces the number of parts and connection links, saves the overall weight of the assembly, reduces the wind resistance influence, shortens the time for the rotating mass body (1) to reach the nominal rotating speed, and realizes the function of controlling the torque gyro to rapidly output torque to the outside.
6. The control moment gyro frame rotor assembly for the micro-nano satellite according to claim 1, characterized in that: the high-speed shafting is simplified in design, an external oil supply system is omitted, the two-year service life of the bearing can be ensured by adding base oil into the first angular contact ball bearing (2) and the second angular contact ball bearing (6) and controlling the oil content of the first angular contact ball bearing (2) and the second angular contact ball bearing (6) retainer, the high-speed shafting can be rapidly assembled, and the weight of the assembly is reduced.
7. The control moment gyro frame rotor assembly for the micro-nano satellite according to claim 1, characterized in that: when the frame rotor assembly is assembled, firstly, a high-speed motor rotor (8) is arranged in the rotating mass body (1) and is glued; then a high-speed motor stator (9) is arranged in the rotating mass body (1), the high-speed motor rotor (8) and the high-speed motor stator (9) are arranged in a frame (7) together through radial grooves of a first bearing mounting seat (72) and a second bearing mounting seat (75), and the high-speed motor stator (9) is fixed on a motor stator mounting bracket (74) through screws; the first angular contact ball bearing (2) is arranged in a first bearing mounting seat (72), the second angular contact ball bearing (6) is arranged in a second bearing mounting seat (75), the two bearings are arranged in a face-to-face mode, one end of a central rotating shaft of the rotating mass body (1) is arranged in an inner ring of the first angular contact ball bearing (2), and the other end of the central rotating shaft of the rotating mass body (1) is arranged in an inner ring of the second angular contact ball bearing (6); and respectively installing the first bearing cover (3) and the second bearing cover (5) on the outer sides of the first bearing installation seat (72) and the second bearing installation seat (75), and applying pretightening force to the bearing through a pretightening screw (4).
8. The control moment gyro frame rotor assembly for the micro-nano satellite according to claim 1, characterized in that: the motor stator mounting bracket (74) is in an arc shape with an arc center angle of 270 degrees and an opening; two adjacent connecting beams form an included angle of 90 degrees.
9. The control moment gyro frame rotor assembly for the micro-nano satellite according to claim 1, characterized in that: the outer circular surface at one end of the central rotating shaft is matched with the inner ring of the first angular contact ball bearing (2); the outer circle surface of the other end of the central rotating shaft is matched with the inner ring of the second angular contact ball bearing (6).
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| CN202110348506.1A CN113212807B (en) | 2021-03-31 | 2021-03-31 | Control moment gyro frame rotor assembly for micro-nano satellite |
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| CN202110348506.1A CN113212807B (en) | 2021-03-31 | 2021-03-31 | Control moment gyro frame rotor assembly for micro-nano satellite |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113983144A (en) * | 2021-09-24 | 2022-01-28 | 北京航空航天大学 | Space shafting becomes preloading mechanism based on SMA silk and spiral friction is vice |
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| DE3241373A1 (en) * | 1982-11-09 | 1984-05-10 | Anschütz & Co GmbH, 2300 Kiel | Spring joint |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113983144A (en) * | 2021-09-24 | 2022-01-28 | 北京航空航天大学 | Space shafting becomes preloading mechanism based on SMA silk and spiral friction is vice |
| CN113983144B (en) * | 2021-09-24 | 2023-08-08 | 北京航空航天大学 | Space shafting becomes preload mechanism based on SMA silk and spiral friction pair |
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|---|---|
| CN113212807B (en) | 2023-05-12 |
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