High-temperature superconducting magnetic levitation electric drilling tool in simulated lunar night environment

Abstract

The application discloses a high-temperature superconducting magnetic levitation electric drilling tool in a simulated moon night environment, which comprises a shell and a magnetic levitation bearing, the shell comprises an upper end cover, the inner bottom wall of the upper end cover is fixed with a YBCO high-temperature superconducting block stator, the bottom of the YBCO high-temperature superconducting block stator is sleeved with a superconducting magnetic levitation bearing rotor, a flywheel is arranged at the superconducting magnetic levitation bearing rotor, the magnetic levitation bearing comprises a rotating shaft, the side surface of the two ends of the rotating shaft is sleeved with a permanent magnet ring, the side surface of the permanent magnet ring is fixed with a magnetic iron ring, the side surface of the magnetic iron ring is fixed with a high-temperature superconductor shell, the middle part of the rotating shaft is sleeved with a motor, and the two sides of the rotating shaft are sequentially sleeved with a radial active magnetic levitation bearing and an axial permanent magnetic levitation bearing. In the moon night environment, the high-temperature superconducting material is in a superconducting state, the whole system has high safety performance, good high-speed rotation adaptability and long service life.

Description

Technical Field

[0001] This invention belongs to the field of drilling tool technology, specifically relating to a high-temperature superconducting magnetic levitation electric drilling tool that simulates a lunar night environment. Background Technology

[0002] The lunar environment is completely different from Earth's atmosphere. Drilling for minerals and rocks on the lunar surface will be different from that on Earth. Therefore, it is particularly important to focus on and solve drilling technology under the lunar environment. At the same time, under the extremely low temperature environment of the lunar night, high-temperature superconducting materials can exhibit superconductivity. Superconductivity can be successfully achieved without the need for an external low-temperature environment. Therefore, it is very necessary to study a high-temperature superconducting magnetic levitation drilling tool suitable for the lunar night environment. Summary of the Invention

[0003] The purpose of this invention is to provide a high-temperature superconducting magnetic levitation electric drilling tool that simulates a lunar night environment.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A high-temperature superconducting magnetic levitation electric drilling tool simulating a lunar night environment includes a housing and a magnetic levitation bearing. The housing includes an upper end cover, and a YBCO high-temperature superconducting block stator is fixed to the inner bottom wall of the upper end cover. A superconducting magnetic levitation bearing rotor is sleeved at the bottom of the YBCO high-temperature superconducting block stator. A flywheel is provided at the superconducting magnetic levitation bearing rotor. The magnetic levitation bearing includes a rotating shaft. Permanent magnet rings are sleeved on both sides of the rotating shaft. A magnet ring is fixed to the side of the permanent magnet ring. A high-temperature superconducting housing is fixed to the side of the magnet ring. A motor is sleeved in the middle of the rotating shaft. Radial active magnetic levitation bearings and axial permanent magnet magnetic levitation bearings are sequentially sleeved on both sides of the rotating shaft. A drill bit chuck is fixed at the bottom of the rotating shaft. A PCBN coated drill bit is connected to the bottom of the drill bit chuck through a mounting hole.

[0006] Preferably, the surface of the PCBN-coated drill bit is embedded with PcBN particles.

[0007] Preferably, the mounting hole of the drill bit chuck is subjected to strong magnetization treatment.

[0008] Preferably, the superconducting magnetic levitation bearing rotor includes a large rotor and a small rotor.

[0009] Preferably, the flywheel includes a permanent magnet cylinder, one end of which is embedded in the side of the superconducting magnetic levitation bearing rotor, and a permanent magnet ring is fixed at the bottom of the permanent magnet cylinder. The bottom of the permanent magnet ring is connected to the rotating shaft by an interference fit through a coupling.

[0010] Preferably, the stator and rotor of the radial active magnetic levitation bearing, the motor, and the axial permanent magnet magnetic levitation bearing are respectively fixed to the surface of the high-temperature superconductor shell and the rotating shaft by interference fit.

[0011] Preferably, a lower end cover is fixed to the bottom of the upper end cover, and the inner wall of the lower end cover is fixed to the outer side of the high-temperature superconductor shell.

[0012] Preferably, the stator of the axial permanent magnet magnetic levitation bearing is made of neodymium iron boron magnet, which is composed of a central cylinder sleeved inside a ring, and the magnetization direction of the central cylinder is opposite to that of the ring.

[0013] Preferably, the stator of the radial active magnetic levitation bearing is an electromagnet.

[0014] Technical effects and advantages of the present invention: The high-temperature superconducting magnetic levitation electric drilling tool device simulating a lunar night environment proposed in this invention has the following advantages compared with the prior art:

[0015] 1. The present invention uses an axial permanent magnet magnetic levitation bearing at the top for axial unloading and to suspend the rotor, and an axial permanent magnet magnetic levitation bearing at the bottom of the device for axial unloading to maintain the stability of the drill bit.

[0016] 2. This invention uses two radial active magnetic levitation bearings to constrain the unstable oscillations that occur when the rotor transitions from static buoyancy to stable operation, thereby enabling the rotor to operate at high speed.

[0017] 3. This invention, through PCBN coated drill bits, can overcome the problems of large mass and unstable high-temperature performance of conventional drill bits, thereby reducing energy consumption and increasing the service life of drill bits.

[0018] 4. This invention, through the YBCO high-temperature superconducting block stator, superconducting magnetic levitation bearing rotor, axial permanent magnet magnetic levitation bearing, and radial active magnetic levitation bearing, can improve the drilling mechanical efficiency of the drill bit and overcome the problems of high adhesive friction loss and low lifespan of conventional drill bits during drilling in a vacuum environment. At the same time, the setting of the YBCO high-temperature superconducting block stator, superconducting magnetic levitation bearing rotor, and flywheel reduces the mechanical energy consumption and mechanical wear caused by friction. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of a high-temperature superconducting magnetic levitation electric drilling tool under simulated lunar night conditions proposed in this invention.

[0020] Figure 2 This is a schematic diagram of the planar structure of the shaft of a high-temperature superconducting magnetic levitation electric drilling tool under simulated lunar night conditions, as proposed in this invention.

[0021] Figure 3This is a schematic diagram of the PCBN-coated drill bit structure of a high-temperature superconducting magnetic levitation electric drilling tool under simulated lunar night conditions, as proposed in this invention.

[0022] Figure 4 This is a schematic diagram of the magnetic bearing structure of a high-temperature superconducting magnetic levitation electric drilling tool under simulated lunar night conditions, as proposed in this invention.

[0023] Figure 5 This is a front view of the magnetic levitation bearing of a high-temperature superconducting magnetic levitation electric drilling tool under simulated lunar night conditions, as proposed in this invention.

[0024] Figure 6 This is a planar schematic diagram of the drill bit chuck of a high-temperature superconducting magnetic levitation electric drilling tool under simulated lunar night conditions, as proposed in this invention. Detailed Implementation

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] This invention provides, for example Figure 1-6 The high-temperature superconducting magnetic levitation electric drilling tool shown is designed for use under simulated lunar night conditions. It includes a housing 1 and a magnetic levitation bearing 8. The housing 1 includes an upper end cover 101. A YBCO high-temperature superconducting block stator 7 is fixed to the inner bottom wall of the upper end cover 101. A superconducting magnetic levitation bearing rotor 2 is sleeved at the bottom of the YBCO high-temperature superconducting block stator 7. A flywheel 9 is provided at the rotor of the superconducting magnetic levitation bearing 2. The magnetic levitation bearing 8 includes a rotating shaft 801. Permanent magnet rings 802 are sleeved on both sides of the rotating shaft 801. A magnet ring 803 is fixed on the side of the permanent magnet ring 802. A high-temperature superconducting housing 804 is fixed on the side of the magnet ring 803. A motor 4 is sleeved in the middle of the rotating shaft 801. Radial active magnetic levitation bearings 3 and axial permanent magnet magnetic levitation bearings 5 ​​are sequentially sleeved on both sides of the rotating shaft 801 located on the motor 4. A drill bit chuck 6 is fixed at the bottom of the rotating shaft 801. A PCBN coated drill bit 10 is connected to the bottom of the drill bit chuck 6 through a mounting hole.

[0027] The stator of the radial active magnetic levitation bearing 3 is magnetically isolated from the high-temperature superconductor housing 804 by a non-magnetic bushing. The stator of the axial permanent magnet magnetic levitation bearing 5 is magnetically shielded by an iron yoke. The stator bushing is magnetically installed between the stator bushing and the high-temperature superconductor housing 804. One YBCO high-temperature superconducting block stator 7 is placed in the center position, and the remaining YBCO high-temperature superconducting block stators 7 are distributed on the circumference around the center position. There is a gap between adjacent YBCO high-temperature superconducting block stators 7.

[0028] The surface of the PCBN-coated drill bit 10 is inlaid with PcBN particles;

[0029] PcBN is a superhard material. Drill bits with different particle sizes can be selected according to different working conditions. The drill bit chuck 6 is a known and commonly used technology product.

[0030] The mounting holes of the drill bit chuck 6 are treated with strong magnetization.

[0031] The superconducting magnetic levitation bearing rotor 2 includes a large rotor and a small rotor.

[0032] The flywheel 9 includes a permanent magnet cylinder 901, one end of which is embedded in the side of the superconducting magnetic levitation bearing rotor 2. A permanent magnet ring 902 is fixed at the bottom of the permanent magnet cylinder 901, and the bottom of the permanent magnet ring 902 is connected to the rotating shaft 801 by an interference fit through a coupling.

[0033] The rotating shaft 801 is connected to the permanent magnet ring 902 via a coupling to ensure the concentricity of the rotating shaft 801.

[0034] The stator and rotor of the radial active magnetic levitation bearing 3, the motor 4, and the axial permanent magnet magnetic levitation bearing 5 are respectively fixed to the surface of the high-temperature superconductor shell 804 and the rotating shaft 801 by interference fit.

[0035] The bottom of the upper end cover 101 is fixed with a lower end cover 102, and the inner wall of the lower end cover 102 is fixed to the outer side of the high-temperature superconductor shell 804.

[0036] The device can be fixed as a whole by setting the upper end cover 101 and the lower end cover 102. The high-temperature superconductor shell 804, the upper end cover 101 and the lower end cover 102 are made of high-strength carbon steel, and other mechanical fixing parts are made of weak magnetic or non-magnetic materials.

[0037] The stator of the axial permanent magnet magnetic levitation bearing 5 uses neodymium iron boron magnets. The neodymium iron boron magnets are composed of a central cylinder fitted inside a ring, and the magnetization direction of the central cylinder is opposite to that of the ring.

[0038] The stator of the radial active magnetic levitation bearing 3 is an electromagnet.

[0039] One of the YBCO high-temperature superconducting block stators 7 is located at the center of the inner bottom wall of the upper end cover 101, and the remaining YBCO high-temperature superconducting block stators 7 are evenly surrounding the sides of the YBCO high-temperature superconducting block stator 7 at the center.

[0040] When in use, select the appropriate PcBN coated drill bit 10 according to the requirements, connect the tool drill bit to the rotating shaft 801 through the drill bit chuck 6, and the operator can hold the lower end cover 102 to connect the power supply to drive the rotor of the motor 4 to rotate the rotating shaft 801, thereby driving the PcBN coated drill bit 10 to rotate for drilling.

[0041] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the invention.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high temperature superconducting magnetically levitated electric drilling tool simulating a lunar night environment, comprising a housing (1) and a magnetic levitation bearing (8), characterized in that: The outer casing (1) includes an upper end cover (101), and a YBCO high-temperature superconducting block stator (7) is fixed to the inner bottom wall of the upper end cover (101). A superconducting magnetic levitation bearing rotor (2) is sleeved at the bottom of the YBCO high-temperature superconducting block stator (7). A flywheel (9) is provided at the superconducting magnetic levitation bearing rotor (2). The magnetic levitation bearing (8) includes a rotating shaft (801), and permanent magnet rings (802) are sleeved on the sides of both ends of the rotating shaft (801). The sides of the permanent magnet rings (802) are fixed. A magnet ring (803) is fixed, and a high-temperature superconductor shell (804) is fixed on the side of the magnet ring (803). A motor (4) is sleeved in the middle of the rotating shaft (801). A radial active magnetic levitation bearing (3) and an axial permanent magnet magnetic levitation bearing (5) are sequentially sleeved on both sides of the rotating shaft (801) and the bottom of the rotating shaft (801) is fixed with a drill bit chuck (6). A PCBN coated drill bit (10) is connected to the bottom of the drill bit chuck (6) through a mounting hole.

2. The high-temperature superconducting magnetically levitated electric drilling tool under simulated moonlight environment according to claim 1, characterized in that: The surface of the PCBN-coated drill bit (10) is inlaid with PcBN particles.

3. The high-temperature superconducting magnetic levitation electric drilling tool for simulating a lunar night environment according to claim 1, characterized in that: The mounting hole of the drill bit holder (6) is subjected to strong magnetization treatment.

4. The high-temperature superconducting magnetic levitation electric drilling tool for simulating a lunar night environment according to claim 1, characterized in that: The superconducting magnetic levitation bearing rotor (2) includes a large rotor and a small rotor.

5. The high-temperature superconducting magnetic levitation electric drilling tool for simulating a lunar night environment according to claim 1, characterized in that: The flywheel (9) includes a permanent magnet cylinder (901), one end of which is embedded in the side of the superconducting magnetic levitation bearing rotor (2). A permanent magnet ring (902) is fixed at the bottom of the permanent magnet cylinder (901), and the bottom of the permanent magnet ring (902) is connected to the rotating shaft (801) by an interference fit through a coupling.

6. The high-temperature superconducting magnetic levitation electric drilling tool for simulating a lunar night environment according to claim 1, characterized in that: The stator and rotor of the radial active magnetic levitation bearing (3), the motor (4) and the axial permanent magnet magnetic levitation bearing (5) are respectively fixed to the surface of the high-temperature superconductor shell (804) and the shaft (801) by interference fit.

7. The high-temperature superconducting magnetic levitation electric drilling tool for simulating a lunar night environment according to claim 1, characterized in that: The bottom of the upper end cover (101) is fixed with a lower end cover (102), and the inner wall of the lower end cover (102) is fixed to the outer side of the high-temperature superconductor shell (804).

8. The high-temperature superconducting magnetic levitation electric drilling tool for simulating a lunar night environment according to claim 1, characterized in that: The stator of the axial permanent magnet magnetic levitation bearing (5) is made of neodymium iron boron magnet, which is composed of a central cylinder fitted inside a ring, and the magnetization direction of the central cylinder is opposite to that of the ring.

9. A high-temperature superconducting magnetic levitation electric drilling tool for simulating a lunar night environment, as described in claim 1, characterized in that: The stator of the radial active magnetic levitation bearing (3) is an electromagnet.

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