Interpenetration core taking device with single piezoelectric stack double side drive, ultrasonic motor and ultrasonic drill

Abstract

The application relates to the technical field of ultrasonic drillers, in particular to a single piezoelectric stack double-side driven staggered penetration coring device, an ultrasonic motor and an ultrasonic driller. The single piezoelectric stack double-side driven staggered penetration coring device comprises a first amplitude conversion mechanism, the first amplitude conversion mechanism comprising a fixed section and an extension section, the extension section being vertically arranged at the center position of the fixed section; a piezoelectric ceramic mechanism, which is sleeved on the extension section and is in contact with the fixed section; a second amplitude conversion mechanism, which is arranged on the side of the piezoelectric ceramic mechanism away from the fixed section and is sleeved on the extension section; and at least two coring pipes, which are arranged in the extension section. The single piezoelectric ceramic mechanism can be used as a power source, the piezoelectric ceramic mechanism is used to drive the first amplitude conversion mechanism and the second amplitude conversion mechanism through the vibration of the two sides, and the first amplitude conversion mechanism and the second amplitude conversion mechanism on one side reversely transmit the vibration generated by the piezoelectric ceramic mechanism.

Description

Technical Field

[0001] This invention relates to the field of ultrasonic drilling technology, specifically to a single piezoelectric stack double-sided driven staggered penetration coring device, an ultrasonic motor, and an ultrasonic drill. Background Technology

[0002] After achieving the "orbiting-landing-returning" three-step strategy of my country's lunar exploration program, the country has continued to plan a lunar regolith polar region water ice sampling mission. This mission aims to obtain the occurrence and distribution patterns of lunar regolith water ice materials deep within the lunar surface. Two special considerations exist for conducting deep lunar regolith water ice exploration at the lunar south pole: 1) Lunar regolith water ice is highly susceptible to disturbance during sampling under extreme low temperatures. It is crucial to ensure that the original physical properties and bedding information of the lunar regolith water ice remain unchanged, achieving "original material, in situ" detection. Since penetration coring is a first-stage coring method, it can be used for low-disturbance coring of lunar regolith water ice. Simultaneously, research on high-fidelity coring methods should be conducted to ensure the in-situ authenticity of the lunar regolith water ice samples. 2) The sampling location is within the permanently shadowed region of the lunar south pole, making power replenishment difficult. Furthermore, the energy carried by the probe is limited, necessitating the search for a low-power, high-efficiency penetration drive method.

[0003] Ultrasonic drills are characterized by their compact structure, low power consumption, low drilling pressure, no lubrication required, and wide temperature range (-200℃ to 500℃), making them suitable for lunar soil and water ice sample penetration. Traditional ultrasonic motors utilize only the unilateral vibration of piezoelectric stacks, which can output longitudinal vibration and longitudinal-torsional composite vibration. However, the vibration mode is relatively simple and cannot meet the requirements of complex lunar surface conditions and lunar soil and water ice sampling. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the ultrasonic motor in the prior art only utilizes the single-sided vibration of the piezoelectric stack, which can output longitudinal vibration and longitudinal-torsional composite vibration, but the vibration mode is relatively simple and it is difficult to meet the requirements of the complex lunar surface conditions and lunar soil water ice sampling. Thus, the present invention provides a single piezoelectric stack double-sided driven staggered penetration coring device, ultrasonic motor, and ultrasonic drill.

[0005] To address the aforementioned technical problems, this invention provides a staggered core sampling device with a single piezoelectric stack and dual-sided drive, comprising: a first amplitude-changing mechanism, the first amplitude-changing mechanism including a fixed section and an extension section, the extension section being vertically disposed at the center of the fixed section; a piezoelectric ceramic mechanism, sleeved on the extension section and in contact with the fixed section; a second amplitude-changing mechanism, disposed on the side of the piezoelectric ceramic mechanism away from the fixed section, and the second amplitude-changing mechanism being sleeved on the extension section; and at least two core sampling tubes, all disposed within the extension section.

[0006] Furthermore, the vibration output of the piezoelectric ceramic mechanism is in opposite directions on both sides, with a phase difference of 180°.

[0007] Furthermore, the first amplitude-changing mechanism, the piezoelectric ceramic mechanism, and the second amplitude-changing mechanism are coaxially arranged.

[0008] Furthermore, the piezoelectric ceramic mechanism comprises a plurality of stacked piezoelectric ceramics.

[0009] Furthermore, the extension section includes a tube body and an open tube, the tube body is connected to the fixed section, and the core sampling tube is disposed inside the open tube.

[0010] Furthermore, the second amplitude-changing mechanism includes a first fixed tube, a second fixed tube, and a connecting tube, wherein the diameter of the first fixed tube is smaller than the diameter of the second fixed tube.

[0011] Furthermore, the inner wall of the second fixed tube is arranged parallel to the outer wall of the open tube.

[0012] Furthermore, the core tube includes a ring body and penetration teeth disposed on the ring body, wherein there are multiple penetration teeth arranged in an alternating manner.

[0013] The present invention also provides an ultrasonic motor, including the aforementioned single piezoelectric stacked double-sided driven staggered core sampling device.

[0014] The present invention also provides an ultrasonic drill, including the aforementioned ultrasonic motor.

[0015] The technical solution of this invention has the following advantages:

[0016] 1. The present invention provides a single piezoelectric stack double-sided driven staggered penetration coring device, comprising: a first amplitude-changing mechanism, the first amplitude-changing mechanism including a fixed section and an extension section, the extension section being vertically disposed at the center position of the fixed section; a piezoelectric ceramic mechanism sleeved on the extension section and in contact with the fixed section; a second amplitude-changing mechanism disposed on the side of the piezoelectric ceramic mechanism away from the fixed section, and the second amplitude-changing mechanism being sleeved on the extension section; and at least two coring tubes, all disposed within the extension section.

[0017] By setting a first amplitude-changing mechanism and a second amplitude-changing mechanism at both ends of the piezoelectric ceramic mechanism—that is, the piezoelectric ceramic mechanism is fitted onto the extension of the first amplitude-changing mechanism, and the second amplitude-changing mechanism is also fitted onto the extension of the first amplitude-changing mechanism—the structural design of the two amplitude-changing mechanisms must also ensure that their natural frequencies in the longitudinal vibration mode are the same or very close. In this way, under the corresponding frequency voltage, the two amplitude-changing rods will vibrate simultaneously and resonate, reaching a resonant state. The core tube is used to drill lunar soil samples.

[0018] Therefore, a single piezoelectric ceramic mechanism can be used as a power source, and the vibration on both sides of the piezoelectric ceramic mechanism can drive the first amplitude-changing mechanism and the second amplitude-changing mechanism. The first amplitude-changing mechanism and the second amplitude-changing mechanism on one side reverse the direction of the vibration generated by the piezoelectric ceramic mechanism and generate a longitudinal impact. Together with the longitudinal impact generated by the second amplitude-changing mechanism on the other side, they form a penetration effect with the same direction but different phases.

[0019] 2. The present invention provides a single piezoelectric stack double-sided driven staggered core sampling device, wherein the vibration output of the piezoelectric ceramic mechanism is opposite in direction on both sides with a phase difference of 180°. That is, the 180° phase difference between the amplified outputs of the first amplitude transformation mechanism and the second amplitude transformation mechanism is mainly achieved through the structural design of the first amplitude transformation mechanism and the second amplitude transformation mechanism.

[0020] 3. The present invention provides a single piezoelectric stack dual-sided driven staggered core sampling device, wherein the first amplitude-changing mechanism, the piezoelectric ceramic mechanism, and the second amplitude-changing mechanism are coaxially arranged. This arrangement effectively ensures the coaxiality of the first amplitude-changing mechanism, the piezoelectric ceramic mechanism, and the second amplitude-changing mechanism, and also ensures the stability of the output of the first amplitude-changing mechanism, the piezoelectric ceramic mechanism, and the second amplitude-changing mechanism.

[0021] 4. The inner wall of the second fixed tube is parallel to the outer wall of the open tube. That is, the inner wall of the second fixed tube is also open, so as to avoid affecting the use effect of the single piezoelectric stack double-sided driven staggered penetration coring device due to the contact between the inner wall of the second fixed tube and the outer wall of the open tube.

[0022] The summary section is provided to present the chosen concepts in a simplified form, which will be further described in the detailed description below. The summary section is not intended to identify essential or necessary features of this disclosure, nor is it intended to limit the scope of this disclosure. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a cross-sectional view of a single piezoelectric stack dual-sided driven staggered penetration coring device provided by the present invention;

[0025] Figure 2 A schematic diagram of the structure of a single piezoelectric stack double-sided driven staggered penetration core sampling device provided by the present invention;

[0026] Figure 3 A half-sectional view of a single piezoelectric stack dual-sided driven staggered penetration coring device provided by the present invention;

[0027] Figure 4 A schematic diagram of the first amplitude-changing mechanism of a single piezoelectric stack double-sided driven staggered penetration coring device provided by the present invention;

[0028] Figure 5 A schematic diagram of the second amplitude-changing mechanism of a single piezoelectric stack double-sided driven staggered penetration coring device provided by the present invention;

[0029] Figure 6 A schematic diagram of the piezoelectric ceramic mechanism of a single piezoelectric stacked double-sided driven staggered penetration core sampling device provided by the present invention;

[0030] Figure 7 This is a schematic diagram of the core tube structure of a single piezoelectric stack double-sided driven staggered penetration core sampling device provided by the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. First amplitude-changing mechanism; 11. Fixed section; 12. Extension section; 121. Tube body; 122. Open tube; 2. Piezoelectric ceramic mechanism; 3. Second amplitude-changing mechanism; 31. First fixed tube; 32. Second fixed tube; 33. Connecting tube; 4. Core tube; 41. Ring body; 42. Penetrating tooth; 5. Lunar soil. Detailed Implementation

[0033] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this disclosure. Therefore, the drawings and description are to be considered exemplary in nature and not restrictive.

[0034] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this disclosure 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, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or connections that allow for communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0036] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] The following disclosure provides numerous different embodiments or examples for implementing various structures of this disclosure. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this disclosure. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this disclosure, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0038] The preferred embodiments of this disclosure are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0039] Please see Figures 1 to 7 As shown, the present invention provides a single piezoelectric stack double-sided driven staggered penetration coring device, comprising: a first amplitude-changing mechanism 1, the first amplitude-changing mechanism 1 including a fixed section 11 and an extension section 12, the extension section 12 being vertically disposed at the center of the fixed section 11; a piezoelectric ceramic mechanism 2, sleeved on the extension section 12 and in contact with the fixed section 11; a second amplitude-changing mechanism 3, disposed on the side of the piezoelectric ceramic mechanism 2 away from the fixed section 11, and the second amplitude-changing mechanism 3 being sleeved on the extension section 12; and coring tubes 4, having at least two, all disposed within the extension section 12.

[0040] A first amplitude-changing mechanism 1 and a second amplitude-changing mechanism 3 are set at both ends of the piezoelectric ceramic mechanism 2. Specifically, the piezoelectric ceramic mechanism 2 is fitted onto the extension section 12 of the first amplitude-changing mechanism 1, and the second amplitude-changing mechanism 3 is also fitted onto the extension section 12 of the first amplitude-changing mechanism 1. The structural design of the two amplitude-changing mechanisms also ensures that their natural frequencies in the longitudinal vibration mode are the same or very close. Thus, under the corresponding frequency voltage, the two amplitude-changing rods will vibrate simultaneously and resonate, reaching a resonant state. The core tube is used to drill lunar soil samples.

[0041] Therefore, a single piezoelectric ceramic mechanism 2 can be used as a power source. The vibrations on both sides of the piezoelectric ceramic mechanism 2 drive the first amplitude-changing mechanism 1 and the second amplitude-changing mechanism 3. The first amplitude-changing mechanism 1 and the second amplitude-changing mechanism 3 on one side reverse the direction of the vibration generated by the piezoelectric ceramic mechanism 2 and generate a longitudinal impact. Together with the longitudinal impact generated by the second amplitude-changing mechanism 3 on the other side, they form a penetration effect with the same direction but different phases.

[0042] In some optional embodiments, the vibration output of the piezoelectric ceramic mechanism 2 is in opposite directions on both sides, with a phase difference of 180°. That is, the 180° phase difference between the amplified outputs of the first amplitude transformer and the second amplitude transformer is mainly achieved through the structural design of the first amplitude transformer and the second amplitude transformer.

[0043] In some optional embodiments, the first amplitude transformer 1, the piezoelectric ceramic mechanism 2, and the second amplitude transformer 3 are coaxially arranged. This arrangement effectively ensures the coaxiality of the first amplitude transformer 1, the piezoelectric ceramic mechanism 2, and the second amplitude transformer 3, and also ensures the stability of the output of the first amplitude transformer 1, the piezoelectric ceramic mechanism 2, and the second amplitude transformer 3.

[0044] In this embodiment, the piezoelectric ceramic mechanism 2 includes multiple stacked piezoelectric ceramics. The number of piezoelectric ceramics can be set according to actual conditions.

[0045] In some alternative embodiments, the extension section 12 includes a tube body 121 and an open tube 122, the tube body 121 being connected to the fixed section 11, and the core tube 4 being disposed within the open tube 122.

[0046] The fixed section 11 is a circular shell. One end of the tube 121 is connected to the fixed section 11, and the other end is connected to the open tube 122. The free end of the extension section 12 is set to be open to facilitate the installation of the core tube 4 in the open tube 122.

[0047] In some optional embodiments, the second amplitude-changing mechanism 3 includes a first fixed tube 31, a second fixed tube 32, and a connecting tube 33, wherein the diameter of the first fixed tube 31 is smaller than the diameter of the second fixed tube 32.

[0048] By setting the diameter of the first fixed tube 31 to be smaller than the diameter of the second fixed tube 32, and connecting the first fixed tube 31 and the second fixed tube 32 with the connecting tube 33, it is convenient for the first fixed tube 31 to match the size of the piezoelectric ceramic mechanism 2, and the second fixed tube 32 is convenient to accommodate the open tube 122, that is, it provides a space for accommodating the open tube 122.

[0049] In some optional embodiments, the inner wall of the second fixed tube 32 is arranged parallel to the outer wall of the open tube 122. That is, the inner wall of the second fixed tube 32 is also open, so as to avoid affecting the use effect of the single piezoelectric stack dual-sided driven staggered penetration coring device due to the inner wall of the second fixed tube 32 contacting the outer wall of the open tube 122.

[0050] In some optional embodiments, the core tube 4 includes a ring body 41 and penetration teeth 42 disposed on the ring body 41, wherein there are multiple penetration teeth 42 and they are staggered.

[0051] The connecting plates are staggered, and the coring tube 4 is distributed in a staggered design. With the vibration of the two amplitude-changing mechanisms, the output power of the coring tube 4 can be stabilized. The staggered penetration teeth 42 can also effectively break up lunar rocks and large pieces of water ice and insert them into the lunar soil 5.

[0052] Meanwhile, the connecting plate is staggered, which can withstand the staggered phases and staggered outputs of the amplitude transformer.

[0053] The present invention also provides an ultrasonic motor, including the aforementioned single piezoelectric stacked double-sided driven staggered core sampling device.

[0054] The present invention also provides an ultrasonic drill, including the aforementioned ultrasonic motor.

[0055] The working principle of this single piezoelectric stack dual-sided driven staggered core sampling device is as follows: the structural design of the first and second amplitude transformers must ensure that their natural frequencies in the longitudinal vibration mode are the same or very close. In this way, the two amplitude transformers will vibrate simultaneously and resonate under the corresponding frequency voltage, that is, reach the resonance state.

[0056] In the first amplitude-changing mechanism 1 and the second amplitude-changing mechanism 3, the upper end of the first amplitude-changing mechanism 1 is fixed, and the vibration input from the outside is transmitted to the inside. The reverse direction forms the longitudinal vibration output of the inner column, and the vibration output is given to the core tube 4 to realize the longitudinal vibration of the core tube 4.

[0057] The vibration output of the piezoelectric stack mechanism is opposite in direction on both sides with a phase difference of 180°, which causes the amplified output of the vibration of the first amplitude transformer 1 and the second amplitude transformer 3 to also have a phase difference, forming the staggered output of the two core tubes 4.

[0058] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A staggered core sampling device with dual-sided drive for a single piezoelectric stack, characterized in that, include: The first amplitude-changing mechanism (1) includes a fixed section (11) and an extension section (12), with the extension section (12) being vertically positioned at the center of the fixed section (11). The piezoelectric ceramic mechanism (2) is sleeved on the extension section (12) and in contact with the fixed section (11); The second amplitude-changing mechanism (3) is located on the side of the piezoelectric ceramic mechanism (2) away from the fixed section (11), and the second amplitude-changing mechanism (3) is sleeved on the extension section (12); The core tube (4) has at least two, both of which are located within the extension section (12); The extension section (12) includes a pipe body (121) and an open pipe (122). The pipe body (121) is connected to the fixed section (11), and the core tube (4) is located inside the open pipe (122). The core tube (4) includes a ring body (41) and penetration teeth (42) provided on the ring body (41). There are multiple penetration teeth (42), which are staggered.

2. The staggered penetration coring device with dual-sided drive for a single piezoelectric stack according to claim 1, characterized in that, The vibration output of the piezoelectric ceramic mechanism (2) is opposite in direction on both sides, with a phase difference of 180°.

3. The staggered penetration coring device with dual-sided drive for a single piezoelectric stack according to claim 2, characterized in that, The first amplitude-changing mechanism (1), the piezoelectric ceramic mechanism (2), and the second amplitude-changing mechanism (3) are coaxially arranged.

4. The staggered penetration coring device with dual-sided drive for a single piezoelectric stack according to claim 3, characterized in that, The piezoelectric ceramic mechanism (2) includes multiple stacked piezoelectric ceramics.

5. The staggered penetration coring device with dual-sided drive for a single piezoelectric stack according to claim 4, characterized in that, The second variable amplitude mechanism (3) includes a first fixed tube (31), a second fixed tube (32), and a connecting tube (33). The connecting tube (33) connects the first fixed tube (31) and the second fixed tube (32). The diameter of the first fixed tube (31) is smaller than the diameter of the second fixed tube (32).

6. The staggered penetration coring device with dual-sided drive for a single piezoelectric stack according to claim 5, characterized in that, The inner wall of the second fixed tube (32) is set parallel to the outer wall of the open tube (122).

7. An ultrasonic motor, characterized in that, The device includes a single piezoelectric stack with dual-sided drive and staggered core sampling as described in any one of claims 1-6.

8. An ultrasonic drilling device, characterized in that, Includes the ultrasonic motor as described in claim 7.

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