阅读说明：本技术 一种基于超磁致伸缩的直线驱动机构及盾构机 (Linear driving mechanism based on giant magnetostriction and shield tunneling machine ) 是由 林明星 范文静 晁东 赵佳佳 于 2021-09-03 设计创作，主要内容包括：本公开涉及一种基于超磁致伸缩的直线驱动机构及盾构机,包括多个推板,两个推板之间安装有多个超磁致伸缩组件,多个超磁致伸缩组件沿圆周方向均布设置,超磁致伸缩组件与推板垂直设置；每个超磁致伸缩组件包括多个超磁致伸缩器,同一组的多个超磁致伸缩器的壳体之间通过连接板固定,同一组的多个超磁致伸缩器通过同一电源电路驱动。(The invention relates to a linear driving mechanism based on giant magnetostriction and a shield tunneling machine, which comprise a plurality of push plates, wherein a plurality of giant magnetostriction components are arranged between the two push plates, the plurality of giant magnetostriction components are uniformly distributed along the circumferential direction, and the giant magnetostriction components are perpendicular to the push plates; each giant magnetostrictive assembly comprises a plurality of giant magnetostrictive devices, the shells of the plurality of giant magnetostrictive devices in the same group are fixed through a connecting plate, and the plurality of giant magnetostrictive devices in the same group are driven through the same power circuit.)

1. A linear driving mechanism based on giant magnetostriction is characterized by comprising a plurality of push plates, wherein a plurality of giant magnetostriction components are arranged between the two push plates, the plurality of giant magnetostriction components are uniformly distributed along the circumferential direction, and the giant magnetostriction components are perpendicular to the push plates;

each giant magnetostrictive assembly comprises a plurality of giant magnetostrictive devices, the shells of the plurality of giant magnetostrictive devices in the same group are fixed through a connecting plate, and the plurality of giant magnetostrictive devices in the same group are driven through the same power circuit.

2. The giant magnetostrictive based linear drive mechanism according to claim 1, wherein the connecting plates comprise a middle connecting plate and a bottom connecting plate, the bottom connecting plate is used for connecting the bottom of the plurality of giant magnetostrictive housings in the same group, and the middle connecting plate is used for connecting the middle of the plurality of giant magnetostrictive housings in the same group.

3. The giant magnetostrictive-based linear drive mechanism according to claim 1, wherein the plurality of giant magnetostrictive elements in the same group are arranged side by side.

4. The linear driving mechanism based on giant magnetostriction as claimed in claim 1, wherein the giant magnetostriction device comprises a cylindrical shell, two ends of the shell are sealed, and a GMM rod is arranged in an inner cavity of the shell and is coaxially arranged with the shell.

5. The linear driving mechanism based on giant magnetostriction as claimed in claim 1, wherein one end of the housing is plugged by a base, the other end of the housing is plugged by an end cap, a through hole is formed in the end cap, a first magnetic conduction ring is arranged on the inner wall surface of the base, a magnetic conduction sheet is arranged on the wall surface of the first magnetic conduction ring close to the inner cavity of the cylinder, one end of the GMM rod is fixed on the wall surface of the magnetic conduction sheet close to the inner cavity of the cylinder, one end of the output rod is coaxially fixed on the other end of the GMM rod, and the other end of the output rod penetrates out of the inner cavity of the housing from the through hole of the upper cover.

6. The linear driving mechanism based on giant magnetostriction as claimed in claim 1, wherein a second magnetic conductive ring is disposed at an end of the inner cavity of the housing away from the base, a disc spring is disposed between the second magnetic conductive ring and the end cap, and the disc spring is sleeved outside the output rod.

7. The linear driving mechanism based on giant magnetostriction according to claim 1, further comprising a coil bobbin disposed in the inner cavity of the housing, wherein the coil bobbin is fixed by a first magnetic conductive ring and a second magnetic conductive ring, and a bias coil and an excitation coil are disposed in the coil bobbin.

8. The linear drive mechanism based on giant magnetostriction according to claim 1, wherein an end of the output rod, which extends out of the inner cavity of the housing, is fixed coaxially with the disk.

9. A shield tunneling machine using the giant magnetostriction-based linear driving mechanism according to any one of claims 1 to 8.

10. The shield tunneling machine of claim 9, wherein the two thrust plates of the linear driving mechanism based on giant magnetostriction are respectively fixedly connected with a cutter head and a shield body of the shield tunneling machine.

Technical Field

The utility model belongs to the technical field of linear drive mechanism, concretely relates to linear drive mechanism and shield constructs machine based on giant magnetostriction.

Background

The statements herein merely provide background related to the present disclosure and may not necessarily constitute prior art.

The linear driving mechanism is a necessary component in some electromechanical devices, the linear driving mechanism can be used for pushing the devices to realize unidirectional linear motion or reciprocating linear motion, and the conventional linear driving mechanism generally comprises a hydraulic cylinder, an electric push rod, a ball screw and the like.

The inventor knows that in some places with small space where a hydraulic station is inconvenient to arrange to drive a hydraulic cylinder and a motor is inconvenient to arrange to drive an electric push rod, a giant magnetostrictive actuator is adopted to realize linear driving, but when the giant magnetostrictive actuator is used singly, accurate and quick propulsion can be realized, but the thrust is insufficient; when a plurality of giant magnetostrictive elements are combined for use, the installation and driving processes are complicated, and each giant magnetostrictive element needs to be driven by an independent power driving circuit, so that the driving circuit and the control strategy of the combined whole linear driving mechanism are very complex.

The propulsion system is one of the main systems of the shield machine and is a power source when the whole shield machine tunnels, and the coordination action of the propulsion system can ensure that the shield machine can accurately propel forwards along the direction of a designed route. The propulsion system of the traditional shield machine generally comprises a propulsion oil cylinder, but the hydraulic propulsion system usually has the defects of low response speed, low control precision, large size and the like, and the defects influence the propulsion speed and precision of the shield machine to a great extent, so that the shield machine with the intelligent propulsion system can realize the accurate and rapid propulsion of the shield machine and greatly reduce the size of the propulsion system of the shield machine.

Disclosure of Invention

The present disclosure provides a linear driving mechanism and a shield tunneling machine based on giant magnetostriction, which can solve at least one of the above technical problems.

In order to achieve the above object, one or more embodiments of the present disclosure provide a linear driving mechanism based on giant magnetostriction, including a plurality of push plates, a plurality of giant magnetostriction assemblies are installed between two push plates, the plurality of giant magnetostriction assemblies are uniformly distributed along a circumferential direction, and the giant magnetostriction assemblies are perpendicular to the push plates; each giant magnetostrictive assembly comprises a plurality of giant magnetostrictive devices, the shells of the plurality of giant magnetostrictive devices in the same group are fixed through a connecting plate, and the plurality of giant magnetostrictive devices in the same group are driven through the same power circuit.

Furthermore, the connecting plate comprises a middle connecting plate and a bottom connecting plate, the bottom connecting plate is used for connecting the bottoms of the plurality of giant magnetostrictive device shells in the same group, and the middle connecting plate is used for connecting the middle of the plurality of giant magnetostrictive device shells in the same group.

Further, a plurality of giant magnetostrictive elements in the same group are arranged side by side.

Furthermore, the giant magnetostrictive actuator comprises a cylindrical shell, two ends of the shell are sealed, a GMM rod is arranged in an inner cavity of the shell, and the GMM rod and the shell are coaxially arranged.

Furthermore, one end of the shell is plugged through the base, the other end of the shell is plugged through the end cover, a through hole is formed in the position of the end cover, a first magnetic conduction ring is arranged on the inner wall surface of the base, a magnetic conduction sheet is arranged on the wall surface, close to the inner cavity of the barrel, of the first magnetic conduction ring, one end of the GMM rod is fixed on the wall surface, close to the inner cavity of the barrel, of the magnetic conduction sheet, one end of the output rod is coaxially fixed on the other end of the GMM rod, and the other end of the output rod penetrates out of the inner cavity of the shell from the through hole of the upper cover.

Furthermore, a second magnetic conduction ring is arranged at one end, deviating from the base, of the inner cavity of the shell, a disc spring is arranged between the second magnetic conduction ring and the end cover, and the disc spring is sleeved outside the output rod.

Furthermore, the coil framework is arranged in the inner cavity of the shell and fixed through a first magnetic conduction ring and a second magnetic conduction ring, and a bias coil and an excitation coil are arranged in the coil framework.

Furthermore, one end of the output rod, which extends out of the inner cavity of the shell, is coaxially fixed with the disc.

One or more embodiments of the present disclosure also provide a shield tunneling machine using the giant magnetostrictive based linear driving mechanism. And the two push plates of the linear driving mechanism based on giant magnetostriction are respectively and fixedly connected with a cutter head and a shield body in the shield tunneling machine.

The beneficial effects of one or more technical schemes are as follows:

according to the super magnetostrictive component, a plurality of super magnetostrictive components are combined to form the super magnetostrictive component, and each super magnetostrictive component is driven by the same power supply driving circuit, so that the driving circuit and a subsequent control strategy are simplified.

Adopt a plurality of giant magnetostrictive subassemblies to set up along the circumferencial direction equipartition to the mode of two push pedals of both ends difference fixed connection makes every giant magnetostrictive subassembly in the linear driving mechanism evenly share load, is convenient for improve the driving force of whole device.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is a schematic structural view of a linear drive mechanism according to one or more embodiments of the present disclosure;

FIG. 2 is a schematic view of a plurality of giant magnetostrictive drive assemblies distributed along a circumferential direction in one or more embodiments of the disclosure;

FIG. 3 is a schematic view of a single giant magnetostrictive drive assembly in one or more embodiments of the present disclosure;

FIG. 4 is a schematic cross-sectional view of a single super magnetostrictive member in accordance with one or more embodiments of the present disclosure;

fig. 5 is a schematic structural diagram of a shield tunneling machine according to one or more embodiments of the present disclosure.

In the figure, 1, a disc; 2. an end cap; 3. an excitation coil; 4. a housing; 5. a flux sleeve; 6. a magnetic conductive sheet; 7. a first magnetically conductive ring; 8. a base; 9. a coil bobbin; 10. a GMM rod; 11. a bias coil; 12. a second magnetically conductive ring; 13. a disc spring; 14. an output rod; 15. a middle connecting plate; 16. a connecting bolt; 17. a bottom connecting plate; 18. a giant magnetostrictive device; 19. a cutter head; 20. a giant magnetostrictive assembly; 21. a first push plate; 22. a shield body; 23. a second push plate.

Detailed Description

Example 1

The embodiment provides a linear driving mechanism based on giant magnetostriction, which comprises a plurality of push plates, such as a first push plate and a second push plate shown in fig. 1. A plurality of giant magnetostrictive components 20 are arranged between the two push plates, the giant magnetostrictive components 20 are uniformly distributed along the circumferential direction, and the giant magnetostrictive components 20 are vertical to the push plates; each giant magnetostrictive assembly 20 comprises a plurality of giant magnetostrictive elements 18, the shells 4 of the plurality of giant magnetostrictive elements in the same group are fixed through a connecting plate, and the plurality of giant magnetostrictive elements 18 in the same group are driven through the same power circuit. The connecting plates comprise a middle connecting plate 15 and a bottom connecting plate 17, the bottom connecting plate 17 is used for connecting the bottoms of the plurality of giant magnetostrictive shell bodies 4 in the same group, and the middle connecting plate 15 is used for connecting the middle of the plurality of giant magnetostrictive shell bodies 4 in the same group. The plurality of giant magnetostrictives in the same group are arranged side by side.

The giant magnetostrictive actuator comprises a cylindrical shell 4, two ends of the shell 4 are sealed, a GMM rod 10 is arranged in an inner cavity of the shell 4, and the GMM rod 10 and the shell 4 are coaxially arranged. One end of the shell 4 is plugged through the base 8, the other end of the shell is plugged through the end cover 2, a through hole is formed in the position of the end cover 2, a first magnetic conduction ring 7 is arranged on the inner wall surface of the base 8, a magnetic conduction sheet 6 is arranged on the wall surface, close to the inner cavity of the barrel, of the first magnetic conduction ring 7, one end of the GMM rod 10 is fixed on the wall surface, close to the inner cavity of the barrel, of the magnetic conduction sheet 6, one end of the output rod 14 is coaxially fixed on the other end of the GMM rod 10, and the other end of the output rod 14 penetrates out of the inner cavity of the shell 4 from the through hole of the upper section cover. A second magnetic conductive ring 12 is arranged at one end of the inner cavity of the shell 4, which is far away from the base 8, a disc spring 13 is arranged between the second magnetic conductive ring 12 and the end cover 2, and the disc spring 13 is sleeved outside the output rod 14. The coil frame 9 is fixed through a first magnetic conductive ring 7 and a second magnetic conductive ring 12, and a bias coil 11 and an exciting coil 3 are arranged in the coil frame 9.

Specifically, each group of giant magnetostrictive assemblies 20 is uniformly distributed along the circumference, one end of each group of giant magnetostrictive assemblies is fixed on the first push plate 21, and the other end of each group of giant magnetostrictive assemblies can move freely. The giant magnetostrictive component 20 mainly comprises a middle connecting plate 15, a connecting bolt 16, a bottom connecting plate 17 and a giant magnetostrictive device 18; each group of giant magnetostrictive actuators 18 is fixed on the bottom connecting plate 17 by the connecting bolt 16 and fixed by the middle connecting plate 15, which is beneficial to ensuring the synchronous operation of the two actuators.

The giant magnetostrictive actuator 18 mainly comprises a disc 1, an end cover 2, an exciting coil 3, a shell 4, a magnetic sleeve 5, a magnetic conductive sheet 6, a first magnetic conductive ring 7, a base 8, a coil framework 9, a GMM rod 10, a bias coil 11, a second magnetic conductive ring 12, a disc spring 13 and an output rod 14; adjusting the magnitude of alternating current input by the exciting coil 3 to generate an exciting magnetic field to control the GMM rod to extend or shorten, when the direction of the exciting magnetic field is consistent with the direction of a bias magnetic field generated by direct current, the synthetic magnetic field is strengthened, the driver outputs positive displacement, when the direction of the exciting magnetic field is opposite to the direction of the bias magnetic field, the synthetic magnetic field is weaker than the bias magnetic field, and the driver outputs negative displacement; a disc spring 13 pre-tightening structure is adopted to apply certain pre-pressure to the GMM rod, so that the GMM rod obtains larger expansion amount; the magnetic sleeve 5, the second magnetic ring 12, the first magnetic ring 7 and the magnetic sheet 6 are used for forming a closed magnetic circuit, so that magnetic leakage can be reduced, and the interference of a magnetic field in the driver to external equipment can be reduced.

Example 2

The embodiment provides a shield tunneling machine which utilizes the linear driving mechanism based on giant magnetostriction. The two push plates of the linear driving mechanism based on giant magnetostriction are respectively and fixedly connected with a cutter head 19 and a shield body 22 in the shield tunneling machine.

Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.