CN109026996B - Magnetic suspension rotating shaft locking protection device and locking protection system - Google Patents
Magnetic suspension rotating shaft locking protection device and locking protection system Download PDFInfo
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- CN109026996B CN109026996B CN201811057812.4A CN201811057812A CN109026996B CN 109026996 B CN109026996 B CN 109026996B CN 201811057812 A CN201811057812 A CN 201811057812A CN 109026996 B CN109026996 B CN 109026996B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0474—Active magnetic bearings for rotary movement
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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
Abstract
The invention provides a magnetic suspension rotating shaft locking protection device and a magnetic suspension rotating shaft locking protection system, and belongs to the technical field of magnetic suspension. The device is including compressing tightly the slider, compress tightly subassembly and shrink pulling subassembly, it includes fixed part and separator to compress tightly the subassembly, the fixed part is used for wearing to establish on the stator, the separator is used for wearing to establish on the rotor and one end pastes with the bell mouth wall on the stator mutually, it is used for providing the pretightning force when fixed part and separator are connected and compresses tightly rotor and stator fixedly to compress tightly the subassembly, release the pretightning force when separator and fixed part separation, it is used for setting up between stator and rotor to compress tightly the slider, and the rotor is through compressing tightly slider to stator transmission pretightning force, shrink pulling subassembly is used for providing the external force of keeping away from the rotor for compressing tightly the slider so that compress tightly the slider and keep away. The invention reserves sufficient axial movement clearance for the rotor and the stator, and avoids the movement interference of the rotor and the stator.
Description
Technical Field
The invention relates to a magnetic suspension rotating shaft locking protection device and a magnetic suspension rotating shaft locking protection system, and belongs to the technical field of magnetic suspension.
Background
In the on-orbit payload of the spacecraft, in order to improve the precision of the payload, the magnetic suspension rotating shaft has the advantages of small friction, long service life, high precision and the like, and the application is increased day by day. When the magnetic suspension rotating shaft is applied, the magnetic suspension rotating shaft is respectively connected with the stator and the rotor. The stator part is arranged on a satellite platform, the rotor part is connected with the stator only through a magnetic suspension rotating shaft, and enough clearance is required to be reserved between the rotor part and the stator part when the rotor normally operates. And the effective loads such as a camera, a radar and the like are arranged on the rotor and rotate together with the magnetic suspension rotating shaft, so that the function is realized.
The bearing capacity of the magnetic suspension rotating shaft is very low. In the ground launching stage of the spacecraft, the mechanical environment caused by the rocket is severe, the load borne by the rotor is transmitted to the stator through the magnetic suspension rotating shaft, and the magnetic suspension rotating shaft can bear the load far exceeding the self-bearing capacity, so that the magnetic suspension rotating shaft and the effective load are damaged, the self function is lost, and the whole satellite task fails. In contrast, the stator and the rotor need to be pressed together by a locking protection device, and the load borne by the rotor is borne by the locking protection device and is directly transmitted to the stator or the satellite platform, so that the magnetic suspension rotating shaft is protected.
The magnetic suspension flywheel pressing device in the civil industrial field has small bearing capacity, can only realize the pressing of a flywheel, and is not suitable for the requirements of magnetic suspension rotating shaft locking protection under the condition of large-mass effective load (Liu Qiang, etc.. the research and development status of magnetic suspension flywheel locking protection technology [ J ]. optical precision engineering, 2014, 22(9):2465 and 2475). The clamping devices commonly used in the spacecraft field, or the components clamped after unlocking, are still attached together, and do not allow sufficient axial movement clearance to be left between the rotor and the stator (an initiating explosive device ZL200610120269.9 for realizing clamping and releasing of the moving component and the spacecraft).
Disclosure of Invention
The technical problem solved by the invention is as follows: aiming at the problems in the prior art, the magnetic suspension rotating shaft locking protection device and the magnetic suspension rotating shaft locking protection system are provided, and the device reserves sufficient axial movement clearance for the rotor and the stator, so that the movement interference of the rotor and the stator is avoided.
The technical scheme for solving the technical problems is as follows:
a magnetic suspension rotating shaft locking protection device comprises a pressing slide block, a pressing assembly and a contraction pulling assembly, the compressing component comprises a fixing part and a separating part, the fixing part is arranged on the stator in a penetrating way, the separating part is arranged on the rotor in a penetrating way, one end of the separating part is attached to the conical hole wall on the stator, the compressing component is used for providing pretightening force to compress and fix the rotor and the stator when the fixing part and the separating part are connected, when the separation part is separated from the fixed part, the pretightening force is released, the pressing slide block is arranged between the stator and the rotor, and the rotor transmits the pretightening force to the stator through the compression sliding block, and the contraction pulling assembly is used for providing an external force far away from the rotor for the compression sliding block so that the compression sliding block is far away from the rotor after the separation part is separated from the fixing part.
In an optional embodiment, a first surface of the pressing slider is configured to be tightly attached to the rotor, a boss is disposed on the first surface, a second surface of the pressing slider is configured to press the stator, and the boss is configured to be inserted into a notch of the rotor.
In an alternative embodiment, the first surface is a slope with an angle of inclination of 0.5-6 °.
In an optional embodiment, the magnetic suspension rotating shaft locking protection device further comprises a locking protection assembly, and the separation part is accommodated in the locking protection assembly to buffer the impact load after separation.
In an optional embodiment, the locking protection assembly comprises a cover plate, an outer pressure spring and an outer barrel, an outer barrel mounting hole is formed in the rotor, a flange is arranged at the first end of the outer barrel, the cover plate is connected with the first end of the outer barrel, a frustum and a separating part mounting hole are formed in the second end of the outer barrel, the separating part mounting hole is used for mounting the separating part, the frustum is located in the outer barrel mounting hole of the rotor and is tightly pressed with the hole wall, and the outer pressure spring is sleeved on the outer barrel.
In an alternative embodiment, the fixing part comprises a connecting piece and an actuator, the separating part comprises a pressing rod, a locking nut, a cone and a ferrule, the cone section of the cone cylinder is attached to the conical hole wall, the middle part of the cone cylinder is provided with a pressing rod through hole, the cylinder section of the cone cylinder is connected with the frustum, the first end of the pressing rod sequentially passes through the mounting hole of the separating part, the through hole of the pressing rod and the connecting piece to be connected, the actuator is used for releasing the connection between the connecting piece and the compression bar so as to release the pretightening force, the clamping sleeve is sleeved outside the conical cylinder, the outer wall of the clamping sleeve is provided with a limiting bulge, the second end of the compressing rod is positioned in the outer barrel, and the part close to the second end is provided with an external thread, and the locking nut is matched with the external thread to apply the pretightening force to the pressing rod.
In an optional embodiment, a connecting cylinder arranged around the through hole of the pressing rod is arranged on the frustum, and a cylinder section of the conical cylinder is in threaded connection with the connecting cylinder.
In an optional embodiment, the separating portion further includes an inner cylinder, a cushion pad, and an inner compression spring, the inner cylinder is located inside the outer cylinder and fixed outside the second end of the compressing rod, the inner compression spring is located between the second end of the compressing rod and the inner cylinder, and the cushion pad is fixed on an outer end surface of the inner cylinder.
In an optional embodiment, the retraction pulling assembly comprises a sliding rod, a support and a sliding rod pressure spring, one end of the sliding rod penetrates through the support and is fixed to the compression sliding block, the other end of the sliding rod is sleeved with the sliding rod pressure spring, when the separation part is connected with the fixing part, the sliding rod pressure spring is in a compressed state, and when the separation part is separated from the fixing part, the sliding rod pressure spring rebounds to provide the compression sliding block with an external force far away from the rotor.
The utility model provides a locking protection system, includes rotor, stator and at least two sets of magnetic suspension pivot locking protection device, a serial communication port, magnetic suspension pivot locking protection device is including compressing tightly the slider, compressing tightly the subassembly and shrink pulling subassembly, it includes fixed part and separator to compress tightly the subassembly, the fixed part is worn to establish on the stator, separator is worn to establish on the rotor and one end with bell mouth wall on the stator pastes mutually, it is used for working as to compress tightly the subassembly provide the pretightning force when fixed part and separator are connected will rotor and stator compress tightly fixedly, work as release when separator and fixed part separate the pretightning force, it is used for setting up to compress tightly the slider between stator and the rotor, just the rotor passes through compress tightly the slider to the stator transmission the pretightning force, shrink pulling subassembly is used for compressing tightly the slider provides to keep away from the external force of rotor so that the slider compresses tightly the separator is in with the separation Away from the rotor.
In an optional embodiment, a notch is formed in an outer edge portion of the rotor, a first surface of the pressing slider is used for being tightly attached to the rotor, a boss is arranged on the first surface, a second surface of the pressing slider presses the stator, the boss is inserted into the notch in the rotor, and the external force far away from the rotor is along the radial direction of the rotor.
In an optional embodiment, the notch is of a trapezoidal structure, the shape of the boss is matched with that of the notch, the lower surface of the rotor at the position of the notch is an inclined surface, the thickness of the edge of the rotor is smaller than that of the middle of the rotor, and the first surface is an inclined surface matched with the lower surface.
In an alternative embodiment, the first surface has an inclination of 0.5-6 °.
In an alternative embodiment, the stator is provided with a slide way extending along the radial direction, and the pressing slide block is positioned in the slide way.
In an alternative embodiment, the locking protection system further comprises a locking protection assembly, and the separation part is accommodated in the locking protection assembly to buffer impact load after separation.
In an optional embodiment, the locking protection assembly comprises a cover plate, an outer pressure spring and an outer barrel, an outer barrel mounting hole is formed in the rotor, a flange is arranged at the first end of the outer barrel, the cover plate is connected with the first end of the outer barrel, a frustum and a separating part mounting hole are formed in the second end of the outer barrel, the separating part mounting hole is used for mounting the separating part, the frustum is located in the outer barrel mounting hole of the rotor and is tightly pressed with the hole wall, and the outer pressure spring is sleeved on the outer barrel.
In an alternative embodiment, the fixing part comprises a connecting piece and an actuator, the separating part comprises a pressing rod, a locking nut, a cone and a ferrule, the cone section of the cone cylinder is attached to the conical hole wall, the middle part of the cone cylinder is provided with a pressing rod through hole, the cylinder section of the cone cylinder is connected with the frustum, the first end of the pressing rod sequentially passes through the mounting hole of the separating part, the through hole of the pressing rod and the connecting piece to be connected, the actuator is used for releasing the connection between the connecting piece and the compression bar so as to release the pretightening force, the clamping sleeve is sleeved outside the conical cylinder, the outer wall of the clamping sleeve is provided with a limiting bulge, the second end of the compressing rod is positioned in the outer barrel, and the part close to the second end is provided with an external thread, and the locking nut is matched with the external thread to apply the pretightening force to the pressing rod.
In an optional embodiment, a connecting cylinder arranged around the through hole of the pressing rod is arranged on the frustum, and a cylinder section of the conical cylinder is in threaded connection with the connecting cylinder.
In an optional embodiment, the separating portion further includes an inner cylinder, a cushion pad, and an inner compression spring, the inner cylinder is located inside the outer cylinder and fixed outside the second end of the compressing rod, the inner compression spring is located between the second end of the compressing rod and the inner cylinder, and the cushion pad is fixed on an outer end surface of the inner cylinder.
In an optional embodiment, the retraction pulling assembly comprises a sliding rod, a support and a sliding rod pressure spring, one end of the sliding rod penetrates through the support and is fixed to the compression slider, the other end of the sliding rod is sleeved with the sliding rod pressure spring, when the separation part is connected with the fixing part, the sliding rod pressure spring is in a compressed state, and when the separation part is separated from the fixing part, the sliding rod pressure spring rebounds to provide external force far away from the rotor for the compression slider.
Compared with the prior art, the invention has the advantages that:
(1) according to the magnetic suspension rotating shaft locking protection device provided by the embodiment of the invention, the compressing slide block is arranged between the rotor and the stator, the pre-tightening force applied to the rotor by the compressing assembly is transmitted through the compressing slide block, so that the separating part of the compressing assembly is only attached to the stator, after the separating part of the compressing slide block is separated from the fixing part, the compressing slide block is pulled away from the area where the rotor is located through the contraction pulling assembly, and meanwhile, the attaching part of the separating part and the stator is separated, so that a sufficient axial movement gap is reserved for the rotor and the stator, and the movement interference of the rotor and the stator is avoided;
(2) the invention can ensure that the states of all parts are controlled after unlocking, prevent the separation part from reentering the motion area of the rotating shaft and ensure the long-term and safe on-orbit operation of the magnetic suspension rotating shaft;
(3) the pressing sliding block and the rotor are in pressing fit through the inclined plane of the self-locking angle, reliable pressing can be guaranteed in the pre-tightening process, the pressing sliding block cannot be accidentally separated due to transverse component force, and the pressing sliding block can be easily separated after unlocking.
(4) The conical cylinder is in threaded fit with the outer cylinder, when pretightening force is applied, the conical cylinder is not in direct contact with the stator, after the pretightening force is applied, the conical cylinder is adjusted to be in contact with the stator conical ring, so that the transverse load resisting effect is achieved, and the conical cylinder does not bear axial pretightening pressure.
Drawings
Fig. 1 is a schematic diagram of an internal component of a magnetic suspension rotating shaft locking protection device provided by an embodiment of the invention;
fig. 2 is a schematic external view of a magnetic suspension rotating shaft locking protection device provided by an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a pressing slider according to an embodiment of the present invention;
fig. 4 is a schematic view of an internal state of the magnetic suspension rotating shaft locking protection device provided by the embodiment of the invention after unlocking;
fig. 5 is a schematic view of an external shape state of the magnetic suspension rotating shaft locking protection device after unlocking according to the embodiment of the invention;
FIG. 6 is a schematic view of a magnetic levitation spindle provided in an embodiment of the present invention;
fig. 7 is a schematic view of another locking protection system according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention will be made in conjunction with the accompanying drawings and detailed description of embodiments of the invention.
Referring to fig. 1 and 2, an embodiment of the present invention provides a magnetic suspension spindle locking protection device, including a pressing slider 12, a pressing assembly and a retraction pulling assembly, the compressing assembly comprises a fixing part 16 and a separating part, the fixing part 16 is used for penetrating on the stator 102, the separating part is used for penetrating the rotor 101 and one end of the separating part is attached to the wall of the conical hole on the stator 102, the compressing component is used for providing a pre-tightening force to compress and fix the rotor 101 and the stator 102 when the fixing part 16 and the separating part are connected, when the separation part is separated from the fixing part 16, the pre-tightening force is released, the pressing slide block 12 is used for being arranged between the stator 102 and the rotor 101, and the rotor 101 transmits the pretightening force to the stator 102 through the pressing slide block 12, the retraction pulling assembly is used for providing an external force to the pressing slider 12 away from the rotor 101 so that the pressing slider 12 is away from the rotor 101 after the separation part is separated from the fixing part 16.
According to the magnetic suspension rotating shaft locking protection device provided by the embodiment of the invention, the compressing slide block is arranged between the rotor and the stator, the pre-tightening force applied to the rotor by the compressing assembly is transmitted through the compressing slide block, so that the separating part of the compressing assembly is only attached to the stator, after the separating part of the compressing slide block is separated from the fixing part, the compressing slide block is pulled away from the area where the rotor is located through the contraction pulling assembly, and meanwhile, the attaching part of the separating part and the stator is separated, so that a sufficient axial movement gap is reserved for the rotor and the stator, and the movement interference of the rotor and the stator is avoided.
As shown in fig. 1 to 4, in an alternative embodiment, a first surface a of the pressing slider 12 is configured to be closely attached to the rotor 101, and the first surface is provided with a boss 121, a second surface of the pressing slider 12 is configured to be pressed against the stator 102, and the boss 121 is configured to be inserted into a notch on the rotor 101. The compressing slide block with the structure can realize the transmission of pre-tightening force and is convenient to separate from the rotor.
In order to ensure the compression, the notch is of a trapezoidal structure, the shape of the boss is matched with that of the notch, the lower surface of the rotor 101 at the position of the notch is preferably an inclined surface, so that the thickness of the edge of the rotor 101 is smaller than that of the middle part, and the first surface is preferably an inclined surface matched with the lower surface. The inclination angle of the first surface a is preferably 0.5 to 6 °. The pressing sliding block and the rotor are in pressing fit through the inclined plane of the self-locking angle, reliable pressing can be guaranteed in the pre-tightening process, the pressing sliding block cannot be accidentally separated due to transverse component force, and the pressing sliding block can be easily separated after unlocking.
In an alternative embodiment, as shown in fig. 1, the stator 102 is provided with a radially extending slide way, and the pressing slider 12 is located in the slide way.
In an optional embodiment, the magnetic suspension rotating shaft locking protection device further comprises a locking protection assembly, and the separation part is accommodated in the locking protection assembly to buffer impact load after separation, so that structural damage is avoided, and the reliability and the service life of the device are improved.
In an optional embodiment, as shown in fig. 1, the locking protection assembly includes a cover plate 1, an outer compression spring 2 and an outer cylinder, an outer cylinder mounting hole is formed in the rotor 101, a flange is formed at a first end of the outer cylinder, the cover plate 1 is connected with the first end of the outer cylinder, a frustum 31 and a separation portion mounting hole are formed at a second end of the outer cylinder, the separation portion mounting hole is used for mounting the separation portion, the frustum 31 is located in the outer cylinder mounting hole of the rotor 101 and is compressed with a hole wall, and the outer compression spring 2 is sleeved on the outer cylinder. The structure transmits pretightening force during connection, and can rebound to form a movement gap between the cone cylinder and the stator during separation.
In an optional embodiment, the fixing portion 16 includes a connecting member and an actuator, the separating portion includes a pressing rod 7, a lock nut 8, a conical cylinder 11 and a sleeve 10, a conical section of the conical cylinder 11 is attached to the conical hole wall, a pressing rod 7 through hole is formed in the middle of the conical section, a cylinder section of the conical cylinder 11 is connected to the frustum 31, a first end of the pressing rod 7 sequentially penetrates through the separating portion mounting hole, the pressing rod 7 through hole and the connecting member to be connected, in an optional embodiment, for convenience of assembly, a spherical pad 9 is arranged at an assembly position of the pressing rod 7 and the separating portion mounting hole, the actuator is used for releasing connection between the connecting member and the pressing rod 7 to release the pre-tightening force, the sleeve 10 is sleeved outside the conical cylinder 11, a limiting protrusion is arranged on an outer wall of the sleeve 10 to enable the conical section to be located between the rotor 101 and the stator 102 all the time, the second end of the pressing rod 7 is located in the outer barrel 3, an external thread is arranged at a position close to the second end, and the locking nut 8 is matched with the external thread to apply the pre-tightening force to the pressing rod 7. Referring to fig. 1, further, the separating part further includes an inner cylinder 5, a buffer pad 4 and an inner compression spring 6, the inner cylinder 5 is located in the outer cylinder 3 and fixed outside the second end of the compressing rod 7, the inner compression spring 6 is located between the second end of the compressing rod 7 and the inner cylinder 5, and the buffer pad 4 is fixed on the outer end surface of the inner cylinder. The structure can buffer the impact load after the separation of the separation part, avoid the structural damage, improve the reliability of the device and prolong the service life of the device; meanwhile, the structure can ensure that the states of all parts are controlled after unlocking, prevent the separation part from entering the moving area of the rotating shaft again, and ensure long-term and safe on-track operation of the magnetic suspension rotating shaft.
Referring to fig. 1, in an alternative embodiment, a connecting cylinder 311 surrounding the through hole of the pressing rod 7 is disposed on the frustum 31, and a cylinder section of the conical cylinder 11 is in threaded connection with the connecting cylinder 311. The structure can ensure that the conical cylinder is not directly contacted with the stator when pretightening force is applied. After the pre-tightening force is applied, the conical section of the conical cylinder is adjusted to be in contact with the wall of the annular hole of the stator conical ring, so that the transverse load resisting effect is achieved, and the conical cylinder does not bear the axial pre-tightening pressure.
In an alternative embodiment, the retraction pulling assembly includes a sliding rod 13, a support 14, and a sliding rod compression spring 15, wherein one end of the sliding rod 13 penetrates through the support 14 and is fixed to the pressing slider 12, and the other end is sleeved with the sliding rod compression spring 15, when the separation part is connected to the fixing part 16, the sliding rod compression spring 15 is in a compressed state, and when the separation part is separated from the fixing part 16, the sliding rod compression spring 15 rebounds to provide an external force far away from the rotor 101 to the pressing slider 12.
Referring to fig. 1 to 4, an embodiment of the present invention further provides a locking protection system, including a rotor 101, a stator 102 and a magnetic suspension rotating shaft locking protection device, wherein the magnetic suspension rotating shaft locking protection device includes a pressing slider, a pressing component and a retraction pulling component, the pressing component includes a fixing portion 16 and a separating portion, the fixing portion 16 is disposed on the stator 102, the separating portion is disposed on the rotor 101, and one end of the separating portion is attached to a wall of a tapered hole on the stator 102, the pressing component is configured to provide a pre-tightening force to press and fix the rotor 101 and the stator 102 when the fixing portion 16 and the separating portion are connected, release the pre-tightening force when the separating portion is separated from the fixing portion 16, the pressing slider 12 is configured to be disposed between the stator 102 and the rotor 101, and the rotor 101 transmits the pre-tightening force to the stator 102 through the pressing slider 12, the retraction pulling assembly is used for providing an external force to the pressing slider 12 away from the rotor 101 so that the pressing slider 12 is away from the rotor 101 after the separation part is separated from the fixing part 16.
According to the locking protection system provided by the embodiment of the invention, the compressing slide block is arranged between the rotor and the stator, and the pre-tightening force applied to the rotor by the compressing assembly is transmitted through the compressing slide block, so that the separating part of the compressing assembly is only attached to the stator, as shown in fig. 4, after the separating part of the compressing slide block is separated from the fixing part, the compressing slide block is pulled away from the area where the rotor is located through the contraction pulling assembly, and meanwhile, the separating part is separated from the attached part of the stator, so that a sufficient axial movement gap is reserved for the rotor and the stator, and the movement interference of the rotor and the stator is avoided.
As shown in fig. 1 to 4, in an alternative embodiment, a notch is formed at an outer edge portion of the rotor 101, a first surface a of the pressing slider 12 is configured to be in close contact with the rotor 101, a boss 121 is formed on the first surface a, a second surface of the pressing slider 12 presses the stator 102, the boss is inserted into the notch formed in the rotor 101, and the external force away from the rotor 101 is along a radial direction of the rotor 101.
To ensure the pressing, the first surface a is preferably an inclined surface, and the inclination angle of the first surface a is preferably 0.5-6 ° to ensure smooth separation of the pressing slider and the rotor after releasing the pressing force, thereby preventing the occurrence of motion interference.
In an optional embodiment, the magnetic suspension rotating shaft locking protection device further comprises a locking protection assembly, and the separation part is accommodated in the locking protection assembly to buffer impact load after separation, so that structural damage is avoided, and the reliability and the service life of the device are improved.
In an optional embodiment, the locking protection component includes a cover plate 1, an external compression spring 2 and an outer cylinder, an outer cylinder mounting hole is formed in the rotor 101, a flange plate is arranged at a first end of the outer cylinder, the cover plate 1 is connected with the first end of the outer cylinder, a frustum 31 and a separation portion mounting hole are formed in a second end of the outer cylinder, the separation portion mounting hole is used for mounting the separation portion, the frustum 31 is located in the outer cylinder mounting hole of the rotor 101 and is tightly pressed against the hole wall, and the external compression spring 2 is sleeved on the outer cylinder. The structure transmits pretightening force during connection, and can rebound to form a movement gap between the cone cylinder and the stator during separation.
In an optional embodiment, the fixing portion 16 includes a connecting member and an actuator, the separating portion includes a pressing rod 7, a lock nut 8, a conical cylinder 11 and a sleeve 10, a conical section of the conical cylinder 11 is attached to the conical hole wall, a pressing rod 7 through hole is formed in the middle of the conical section, a cylinder section of the conical cylinder 11 is connected to the frustum 31, a first end of the pressing rod 7 sequentially penetrates through the separating portion mounting hole, the pressing rod 7 through hole and the connecting member to be connected, in an optional embodiment, for convenience of assembly, a spherical pad 9 is arranged at an assembly position of the pressing rod 7 and the separating portion mounting hole, the actuator is used for releasing connection between the connecting member and the pressing rod 7 to release the pre-tightening force, the sleeve 10 is sleeved outside the conical cylinder 11, a limiting protrusion is arranged on an outer wall of the sleeve 10 to enable the conical section to be located between the rotor 101 and the stator 102 all the time, the second end of the pressing rod 7 is located in the outer barrel 3, an external thread is arranged at a position close to the second end, and the locking nut 8 is matched with the external thread to apply the pre-tightening force to the pressing rod 7.
Referring to fig. 1, in an alternative embodiment, a connecting cylinder 311 surrounding the through hole of the pressing rod 7 is disposed on the frustum 31, and a cylinder section of the conical cylinder 11 is in threaded connection with the connecting cylinder 311. The structure can ensure that the conical cylinder is not directly contacted with the stator when pretightening force is applied. After the pre-tightening force is applied, the conical section of the conical cylinder is adjusted to be in contact with the wall of the annular hole of the stator conical ring, so that the transverse load resisting effect is achieved, and the conical cylinder does not bear the axial pre-tightening pressure.
Referring to fig. 1, in an alternative embodiment, the separating portion further includes an inner cylinder 5, a buffer 4 and an inner compression spring 6, the inner cylinder 5 is located inside the outer cylinder 3 and fixed outside the second end of the pressing rod 7, the inner compression spring 6 is located between the second end of the pressing rod 7 and the inner cylinder 5, and the buffer 4 is fixed on the outer end surface of the inner cylinder. The structure can buffer impact load after separation of the separation part, avoid structural damage, and improve the reliability and the service life of the device.
In an alternative embodiment, the retraction pulling assembly includes a sliding rod 13, a support 14, and a sliding rod compression spring 15, wherein one end of the sliding rod 13 penetrates through the support 14 and is fixed to the pressing slider 12, and the other end is sleeved with the sliding rod compression spring 15, when the separation part is connected to the fixing part 16, the sliding rod compression spring 15 is in a compressed state, and when the separation part is separated from the fixing part 16, the sliding rod compression spring 15 rebounds to provide an external force far away from the rotor 101 to the pressing slider 12.
The following is a specific embodiment of the present invention:
as shown in fig. 1, the present embodiment provides a locking protection system, which includes a cover plate 1, an outer compression spring 2, an outer cylinder 3, a cushion pad 4, an inner cylinder 5, an inner compression spring 6, a compression rod 7, a locking nut 8, a spherical pad 9, a ferrule 10, a conical cylinder 11, a compression slider 12, a sliding rod 13, a support 14, a sliding rod compression spring 15, and a fixing portion (a fire separation nut) 16.
In the pressing state, the outer cylinder 3 is pressed against the rotor 101 under the action of the pretightening force of the pressing rod 7. The rotor 101 and the stator 102 are pressed by the pressing slider 12. The force transmission path of the locking protection device is as follows: the pre-tightening force is transmitted to the rotor 101 from the outer cylinder 3, and the load of the rotor 101 is transmitted to the pressing slide block 12 and then to the stator 102. The matching surface of the outer cylinder 3 and the rotor 101 is a conical ring, and can play a role in transverse shearing resistance. An external pressure spring 2 is arranged between the rotor 101 and the flange of the outer cylinder 3.
A certain space is reserved at the upper part of the pressing rod 7 and is used as a movement area after the pressing rod 7 is unlocked. And a buffer pad 4 on the upper part of the compression rod 7 is used for buffering the impact load after unlocking. The buffer pad 4 is adhered to the inner cylinder 5, and the pressing rod 7 is in threaded connection with the inner cylinder 5. An inner pressure spring 6 is arranged between the lower end surfaces of the inner cylinder 5 and the outer cylinder 3. The pre-tightening load of the compression rod 7 is applied by the lock nut 8, and the spherical pad 9 enables the compression rod 7 to better adapt to assembly errors. The lower end of the pressing rod 7 is connected with the fixing part 16, and the pressing rod 7 can be released after the fixing part 16 is detonated.
The conical cylinder 11 is in threaded fit with the outer cylinder 3, and when the pressing rod 7 applies pretightening force, the conical cylinder 11 is adjusted to prevent the conical cylinder 11 from being in direct contact with the stator 102. After the pre-tightening force is applied, the thread matching section of the conical cylinder 11 and the outer cylinder 3 is adjusted, so that the conical cylinder 11 is in contact with a conical ring (wall of a conical hole) of the stator 102 to play a role in resisting transverse load, and the conical cylinder 11 does not bear axial pre-tightening pressure.
The pressing slide block 12 is in threaded fit with the slide rod 13, and a slide rod pressure spring 15 is arranged on a flange at the end part of the slide rod 13 and a support 14 bracket. The matching surface of the pressing sliding block 12 and the rotor 101 is a 4-degree inclined surface, so that the pressing sliding block 12 can be easily separated from the rotor 101, and the assembly error can be better adapted during pressing. The 4-degree inclined plane ensures that the pressing slide block 12 and the rotor 101 are in a self-locking state in the axial pretightening force applying process, and the pressing slide block 12 cannot be accidentally separated due to excessive transverse component force. The cutting sleeve 10 is in threaded connection with the conical cylinder 11.
Fig. 2 is a partial outline view of a lock protection system.
As shown in fig. 3, the upper and lower surfaces of the pressing slider are matched schematically. The upper end of the pressing sliding block 12 is designed with a trapezoidal boss which is matched with a trapezoidal gap on the rotor 101 to play a role in assisting shearing resistance. The lower end of the pressing sliding block 12 is designed with a trapezoid strip structure, and the trapezoid strip structure is matched with the trapezoid slide way on the stator 102, so that the phenomenon of motion clamping stagnation of the pressing sliding block 12 in the sliding process is avoided.
Fig. 4 is a schematic diagram showing an internal state of the magnetic suspension rotating shaft locking protection device after unlocking. After the fixing part 16 is detonated, the connection between the pressing rod 7 and the fixing part 16 is released, and the pretightening force of all the pressing surfaces disappears. The pressing rod 7 moves upwards under the action of the internal compression spring 6 until the buffer cushion 4 is contacted with the cover plate 1. The outer cylinder 3 is unlocked along with the fixing part 16 and also moves upwards under the action of the outer compression spring 2 until the clamping sleeve 10 is in flange contact with the rotor 101. The compressing slide block 12 drives the slide rod 13 and the compressing slide block 12 to move under the action of the slide rod compression spring 15, so that the compressing slide block is separated from the rotor 101 and leaves a space. The 3 motion links are independent from each other and have no motion coupling, an axial gap exists between the rotor 101 and the stator 102 after the motion is finished, a radial gap exists between the rotor and the pressing slide block 12, and motion spaces are reserved in all directions, so that the rotation envelope of the rotor 101 is ensured.
As shown in fig. 5, it is a schematic diagram of the external shape state of the magnetic suspension rotating shaft locking protection device after unlocking.
FIG. 6 is a schematic view of a magnetic levitation spindle;
fig. 7 is an overall schematic view of another locking protection system, in which 4 locking protection devices are uniformly distributed along the circumferential direction. The rotor 101 is used for mounting a spacecraft payload and is only connected with the magnetic levitation rotating shaft 103. The upper end of the magnetic suspension rotating shaft 103 is connected with the rotor 101, and the lower end shell is connected with the stator 102.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (20)
1. A magnetic suspension rotating shaft locking protection device is characterized by comprising a pressing slide block, a pressing assembly and a contraction pulling assembly, the compressing component comprises a fixing part and a separating part, the fixing part is arranged on the stator in a penetrating way, the separating part is arranged on the rotor in a penetrating way, one end of the separating part is attached to the conical hole wall on the stator, the compressing component is used for providing pretightening force to compress and fix the rotor and the stator when the fixing part and the separating part are connected, when the separation part is separated from the fixed part, the pretightening force is released, the pressing slide block is arranged between the stator and the rotor, and the rotor transmits the pretightening force to the stator through the compression sliding block, and the contraction pulling assembly is used for providing an external force far away from the rotor for the compression sliding block so that the compression sliding block is far away from the rotor after the separation part is separated from the fixing part.
2. The magnetic suspension rotating shaft locking protection device as claimed in claim 1, wherein a first surface of the pressing slider is used for being tightly attached to the rotor, and a boss is arranged on the first surface, a second surface of the pressing slider is used for pressing the stator, and the boss is used for being inserted into a notch on the rotor.
3. The magnetic levitation spindle lock protection device as claimed in claim 2, wherein the first surface is a slope with an angle of 0.5-6 °.
4. The magnetic levitation spindle lock protection device as claimed in claim 1, further comprising a lock protection assembly, wherein the separation portion is received in the lock protection assembly to cushion the impact load after separation.
5. The magnetic suspension rotating shaft locking protection device as claimed in claim 4, wherein the locking protection component comprises a cover plate, an external pressure spring and an outer cylinder, the rotor is provided with an outer cylinder mounting hole, the first end of the outer cylinder is provided with a flange, the cover plate is connected with the first end of the outer cylinder, the second end of the outer cylinder is provided with a frustum and a separating part mounting hole, the separating part mounting hole is used for mounting the separating part, the frustum is located in the outer cylinder mounting hole of the rotor and is tightly pressed with the hole wall, and the external pressure spring is sleeved on the outer cylinder.
6. The magnetic suspension rotating shaft locking protection device according to claim 5, wherein the fixing portion comprises a connecting piece and an actuator, the separating portion comprises a pressing rod, a locking nut, a conical cylinder and a clamping sleeve, the conical section of the conical cylinder is attached to the conical hole wall, a pressing rod through hole is formed in the middle of the conical section, the cylindrical section of the conical cylinder is connected with the frustum, the first end of the pressing rod sequentially penetrates through the separating portion mounting hole, the pressing rod through hole and the connecting piece to be connected, the actuator is used for releasing the connection between the connecting piece and the pressing rod to release the pre-tightening force, the clamping sleeve is sleeved outside the conical cylinder, a limiting protrusion is arranged on the outer wall of the clamping sleeve and used for enabling the conical section to be located between the rotor and the stator all the time, the second end of the pressing rod is located in the outer cylinder, and an external thread is arranged on a position, the locking nut is matched with the external thread to apply the pretightening force to the pressing rod.
7. The magnetic suspension rotating shaft locking protection device as claimed in claim 6, wherein the frustum is provided with a connecting cylinder surrounding the through hole of the pressing rod, and a cylinder section of the conical cylinder is in threaded connection with the connecting cylinder.
8. The magnetic levitation spindle lock protection device as claimed in claim 6, wherein the separating portion further comprises an inner cylinder, a buffer pad and an inner compression spring, the inner cylinder is located in the outer cylinder and fixed outside the second end of the compressing rod, the inner compression spring is located between the second end of the compressing rod and the inner cylinder, and the buffer pad is fixed on the outer end surface of the inner cylinder.
9. The magnetic suspension rotating shaft locking protection device according to claim 1, wherein the retraction pulling assembly comprises a sliding rod, a support and a sliding rod pressure spring, one end of the sliding rod penetrates through the support and is fixed with the pressing slider, the other end of the sliding rod is sleeved with the sliding rod pressure spring, when the separation part is connected with the fixed part, the sliding rod pressure spring is in a compressed state, and when the separation part is separated from the fixed part, the sliding rod pressure spring rebounds to provide an external force far away from the rotor for the pressing slider.
10. The utility model provides a locking protection system, includes rotor, stator and at least two sets of magnetic suspension pivot locking protection device, a serial communication port, magnetic suspension pivot locking protection device is including compressing tightly the slider, compressing tightly the subassembly and shrink pulling subassembly, it includes fixed part and separation part to compress tightly the subassembly, the fixed part is worn to establish on the stator, the separation part is worn to establish on the rotor and one end with bell mouth wall on the stator pastes mutually, it is used for working as to compress tightly the subassembly provide the pretightning force when fixed part and separation part are connected will rotor and stator compress tightly fixedly, work as release when separation part and fixed part separate the pretightning force, it is used for setting up to compress tightly the slider between stator and the rotor, just the rotor passes through compress tightly the slider to the stator transmission the pretightning force, shrink pulling subassembly is used for compress tightly the slider provides and keep away from the external force of rotor so that the slider compresses tightly separation And away from the rotor.
11. The locking protection system of claim 10, wherein the rotor has a notch at an outer edge thereof, the first surface of the pressing slider is configured to be tightly attached to the rotor, and the first surface is provided with a boss, the second surface of the pressing slider presses the stator, the boss is inserted into the notch on the rotor, and the external force away from the rotor is along a radial direction of the rotor.
12. The locking protection system of claim 11, wherein the notch is of a trapezoidal configuration, the shape of the boss matches the shape of the notch, the lower surface of the rotor at the location of the notch is an inclined surface, such that the thickness of the edge of the rotor is less than the thickness of the middle portion, and the first surface is an inclined surface adapted to the lower surface.
13. The locking protection system of claim 11 wherein the first surface is inclined at an angle of 0.5-6 °.
14. The locking protection system of claim 11 wherein said stator has a radially extending slide therein, said hold down slide being located in said slide.
15. The locking protection system of claim 10, further comprising a locking protection assembly, the breakaway portion being received within the locking protection assembly to cushion a breakaway impact load.
16. The locking protection system of claim 10, wherein the locking protection assembly comprises a cover plate, an external pressure spring and an external cylinder, the rotor is provided with an external cylinder mounting hole, the first end of the external cylinder is provided with a flange, the cover plate is connected with the first end of the external cylinder, the second end of the external cylinder is provided with a frustum and a separating part mounting hole, the separating part mounting hole is used for mounting the separating part, the frustum is located in the external cylinder mounting hole of the rotor and is tightly pressed with a hole wall, and the external pressure spring is sleeved on the external cylinder.
17. The locking protection system of claim 16, wherein the securing portion comprises an attachment member and an actuator, the separating part comprises a pressing rod, a locking nut, a conical cylinder and a clamping sleeve, the conical section of the conical cylinder is attached to the hole wall of the conical hole, the middle part of the conical cylinder is provided with a pressing rod through hole, the cylinder section of the cone cylinder is connected with the frustum, the first end of the pressing rod sequentially passes through the separating part mounting hole, the pressing rod through hole and the connecting piece to be connected, the actuator is used for releasing the connection between the connecting piece and the compression bar so as to release the pretightening force, the clamping sleeve is sleeved outside the conical cylinder, the outer wall of the clamping sleeve is provided with a limiting bulge, the second end of the compressing rod is positioned in the outer barrel, and the part close to the second end is provided with an external thread, and the locking nut is matched with the external thread to apply the pretightening force to the pressing rod.
18. The locking protection system of claim 17, wherein the frustum is provided with a connecting cylinder surrounding the through hole of the compression rod, and a cylinder section of the conical cylinder is in threaded connection with the connecting cylinder.
19. The lock protection system of claim 17, wherein the breakaway portion further comprises an inner barrel positioned within the outer barrel and secured outside the second end of the hold down bar, a cushioning pad positioned between the second end of the hold down bar and the inner barrel, and an inner compression spring secured to an outer end surface of the inner barrel.
20. The locking protection system of claim 10, wherein the retraction pulling assembly comprises a sliding rod, a support, and a sliding rod compression spring, wherein one end of the sliding rod penetrates through the support and is fixed to the pressing slider, and the other end of the sliding rod is sleeved with the sliding rod compression spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811057812.4A CN109026996B (en) | 2018-09-11 | 2018-09-11 | Magnetic suspension rotating shaft locking protection device and locking protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811057812.4A CN109026996B (en) | 2018-09-11 | 2018-09-11 | Magnetic suspension rotating shaft locking protection device and locking protection system |
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| CN109026996A CN109026996A (en) | 2018-12-18 |
| CN109026996B true CN109026996B (en) | 2020-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811057812.4A Active CN109026996B (en) | 2018-09-11 | 2018-09-11 | Magnetic suspension rotating shaft locking protection device and locking protection system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111456986B (en) * | 2020-03-20 | 2021-11-16 | 北京控制工程研究所 | Memory alloy locking and releasing mechanism |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2842205A1 (en) * | 1978-09-28 | 1980-04-17 | Teldix Gmbh | Satellite stabilising wheel with rotor containing flywheel - has rotor magnetic bearing controlled by both permanent magnet and electromagnetic coils |
| EP1099093A1 (en) * | 1998-07-23 | 2001-05-16 | Bristol Aerospace Limited | System and method for spacecraft attitude control |
| DE19938079C1 (en) * | 1999-08-12 | 2000-11-02 | Karlsruhe Forschzent | Superconducting magnetic bearing, e.g. for a flywheel energy storage unit, has a rotor disk of coaxial radially clamped permanent magnet rings forming gaps with high temperature superconductor stator rings |
| JP2010159635A (en) * | 2009-01-06 | 2010-07-22 | Hitachi Appliances Inc | Compressor and refrigerator using the same |
| CN102390546B (en) * | 2011-08-02 | 2015-05-06 | 中国人民解放军国防科学技术大学 | Magnetic suspension fly wheel locking device |
| CN104309821A (en) * | 2014-09-29 | 2015-01-28 | 北京石油化工学院 | Repeatable maglev flywheel locking device |
| CN106015308B (en) * | 2016-05-27 | 2018-07-31 | 北京空间飞行器总体设计部 | A kind of non-eccentricity 180 degree expansion locking hinge device |
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2018
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