CN214465243U - Magneto-electric hydraulic driver - Google Patents

Abstract

The utility model provides a magnetoelectric hydraulic driver, which comprises a driver shell, a detection component, a driving body and an output rod, the driver shell is provided with a first accommodating space, the detection assembly is arranged on the driver shell and arranged along the circumferential direction of the first accommodating space, the output rod comprises a first end part and a second end part which are connected in sequence, the second end part is installed in the first accommodating space and can be driven by the driving body to move, and the first end part can be moved to the outside of the first accommodating space, work as the driving body orders about thereby can change detection element magnetic field and then change detection element's output signal can obtain during the output rod motion owing the displacement that the motion produced, the utility model discloses simple structure, the integrated level is high, easily guarantees that manufacturing accuracy and measurement accuracy are high.

Description

Magneto-electric hydraulic driver

Technical Field

The utility model relates to a detect sensor technique and accurate executive device field, specifically, relate to a magneto-electric hydraulic drive ware.

Background

With the development of miniature propulsion systems in aerospace, cell titration drug delivery in bioengineering, deep sea exploration and the like, the combination of new material technology, ultra-precise positioning technology and hydraulic technology to realize large-stroke high-precision driving is a trend of fluid control system development, so that higher requirements are provided for hydraulic driving execution devices and automation degree.

The current precision hydraulic executive device generally adopts a method of an external sensing device, and the integration level of the system is poor. There are also many designs in the prior art, for example, patent document CN109854567B discloses a hydraulic actuator which provides a hydraulic actuator with a complicated structure, but the design does not have a position output detection capability. For another example, patent document CN105723101B discloses a hydraulic actuator and a method of discontinuously changing the position output of the hydraulic actuator, providing a complicated position output changing method.

However, these designs do not have the capability of detecting the position output size, which is not favorable for the integrated design of the system.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model aims at providing a magnetoelectric hydraulic drive ware.

According to the utility model provides a magnetoelectric hydraulic driver, including driver casing, detection element, driving body and output lever;

the driver shell is provided with a first accommodating space, and the detection assembly is mounted on the driver shell and arranged along the circumferential direction of the first accommodating space;

the output rod comprises a first end part and a second end part which are connected in sequence, and the second end part is installed inside the first accommodating space and can be driven by the driving body to move and can enable the first end part to move to the outside of the first accommodating space;

when the driving body drives the output rod to move, the magnetic field around the detection assembly can be changed, and then the output signal of the detection assembly is changed, so that the displacement generated by the movement can be obtained.

Preferably, the detection assembly comprises a magnetic yoke, a coil, a magnetostrictor and a piezoelectric body;

the magnetostrictive body and the piezoelectric body are sequentially arranged on the magnetic yoke, and the coil is arranged along the circumferential direction of the magnetostrictive body.

Preferably, the magnetostrictive body is capable of operating in a resonant state and a non-resonant state upon excitation of the coil.

Preferably, the magnetostrictive body and the piezoelectric body are made of magnetostrictive materials and piezoelectric materials respectively.

Preferably, the second end portion is movable between a first position and a second position toward one end of the driving body, the first receiving space forms a second receiving space between the first position and the second position, and the detection assembly is arranged along a circumferential direction of the second receiving space.

Preferably, the driver housing is made of a non-magnetic material.

Preferably, the non-magnetic conductive material is any one of plastic, aluminum alloy and titanium alloy.

Preferably, the second end portion is made of any one of the following materials:

-a magnetically permeable material;

-a permanent magnet material;

-a non-magnetically conductive material.

Preferably, the magnetic conductive material is made of any one of the following materials:

-permalloy;

-electrically pure iron;

-silicon steel;

-an amorphous alloy.

Preferably, the drive body employs any one of the following fluids:

-water;

-water comprising magnetic particles;

-a magnetic liquid.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model provides a hydraulic drive ware simple structure, the integrated level is high, and easily guarantees the manufacturing precision.

2. The utility model discloses the novelty with the integrated feed hydraulic drive of magnetoelectric displacement detection part for driver itself possesses position detection ability, helps realizing the control of driver displacement output.

3. The utility model discloses in through the displacement that the material of selecting among the driver output rod part or the composition of liquid medium all can obtain the output, can be according to the nimble setting of concrete application scene, the practicality is strong.

4. The utility model provides a displacement detection structure based on magnetoelectric effect, convenient to use, and can carry out the precision measurement to the small displacement that the fluid produced or the small displacement that the output pole produced, measurement accuracy is high.

5. The utility model discloses the drive process can realize the detection of displacement, through further improving, helps realizing the automatic control drive of predetermined displacement.

Drawings

Other features, objects and advantages of the invention will become more apparent from a reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.

Fig. 1 is a schematic view of the structure and the working principle of embodiment 2 of the present invention;

fig. 2 is a schematic view of the structure and the operation principle of embodiment 3 of the present invention.

The figures show that:

1-driver housing 3-driver body

2-detection assembly 4-output rod

21-magnetic yoke 41-first end

22-coil 42-second end

23-magnetostriction body d-output rod output displacement

24-piezo V-piezo output voltage signal

Detailed Description

The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.

Example 1:

the utility model provides a magnetoelectric hydraulic driver, including driver casing 1, detection component 2, drive body 3 and output rod 4, be provided with first accommodation space 5 on the driver casing 1, detection component 2 installs on driver casing 1 and along the circumference of first accommodation space arranges; the output rod 4 comprises a first end part 41 and a second end part 42 which are connected in sequence, the first accommodating space 5 is used as a passage for the extending and retracting movement of the output rod 4, the second end part 42 is installed in the first accommodating space 5 and can move synchronously with the first end part 41 under the driving of the driving body 3, the first end part 41 can be driven to move to the outside of the first accommodating space 5 and is connected with other equipment to realize corresponding functions and used as a transmission part for outputting the driving force by a hydraulic driver; when the driving body 3 drives the output rod 4 to move, the magnetic field around the detection assembly 2 can be changed, and then the displacement of the output rod 4 can be obtained.

Further, the change of the magnetic field around the sensing assembly 2 may be caused by the movement of the magnetic member on the output rod 4 or the movement of the driving body 3 in the first receiving space 5.

Specifically, the second end portion 42 is movable between a first position and a second position toward one end of the driving body 3, the first accommodating space 5 forms a second accommodating space between the first position and the second position, and the detection assembly 2 is arranged along a circumferential direction of the second accommodating space.

Specifically, the second end 42 can be made of a magnetic material, such as permalloy, electrical pure iron, silicon steel, amorphous alloy, etc. And if the permanent magnet is made of permanent magnet material. The second end 42 may be made of a non-magnetic material, such as a non-magnetic material.

Specifically, the detection assembly 2 includes a magnetic yoke 21, a magnetostrictive body 23, and a piezoelectric body 24, and the magnetostrictive body 23 and the piezoelectric body 24 are sequentially mounted on the magnetic yoke 21. The coil 22 is preferably provided in the circumferential direction of the magnetostrictive body 23, and the magnetostrictive body 23 can operate in a resonant state and a non-resonant state by excitation of the coil 22, and can enhance a voltage signal that changes in the piezoelectric body 24, thereby enhancing detection sensitivity.

Specifically, the driver housing 1 is made of a non-magnetic material, and the non-magnetic material is any one or more of plastic, aluminum alloy, and titanium alloy.

Specifically, the driving body 3 can adopt fluid such as water, water including magnetic particles, magnetic liquid, and the driving body 3 can also adopt solid piece made of metal magnetic conductive material and non-magnetic conductive material, and the driving effect of the utility model can be obtained.

Example 2:

this embodiment is a preferred embodiment of embodiment 1.

The embodiment provides a magnetoelectric hydraulic actuator, including an actuator housing 1, a detection unit 2, a drive body 3 and an output rod 4, as shown in fig. 1, the detection unit 2 generates a magnetic field under the excitation of a coil 22, a closed magnetic circuit is formed by the actuator output rod 4 and the drive body 3, when the drive body 3 drives the output rod 4 to generate output displacement, the proportion of the output rod 4 and the drive body 3 in the closed magnetic circuit is changed, the magnetic field finally acting on the magnetoelectric displacement detection unit 2 is changed, and the magnetostriction body 23 can be extended or shortened, therefore, the degree of the magnetostriction body 23 pressing the piezoelectric body 24 is changed, and further, a detection voltage which is changed relative to the output displacement of the output rod 4 is detected from the piezoelectric body 24. The driver shell 1 is made of a non-magnetic-conductive plastic material, the first end portion 41 of the driver output rod 4 is made of a non-magnetic-conductive material, the second end portion 42 of the driver output rod is made of a permalloy magnetic-conductive material, and the driving body 3 is made of pure water.

Further, the detection assembly 2 includes a coil 22, a magnetostrictive body 23, a piezoelectric body 24, and a magnetic yoke 21, wherein the magnetostrictive body 23 and the piezoelectric body 24 are respectively made of a magnetostrictive material and a piezoelectric material, a limiting space is provided in the magnetic yoke 21, the magnetostrictive body 23 and the piezoelectric body 24 are sequentially mounted in the magnetic yoke 21, and when the magnetostrictive body 23 changes due to a surrounding magnetic field, a change of extension or contraction occurs to change a pressing force on the piezoelectric body 24, so as to finally change a voltage signal of the piezoelectric body 24.

Specifically, the detection unit 2 is operated in a resonant state by being excited by the coil 22, the output rod 4 generates an output displacement d by the driving body 3, and a magnetic field acting on the detection unit 2 changes with the change of d, so that the magnetostrictive body 23 extends or contracts, and a detection voltage signal that changes the piezoelectric body 24 is generated.

And finally, the driver output displacement sensing is realized.

Example 3:

example 3 is a modification of example 1.

The present embodiment is different from embodiment 2 in that:

the present embodiment provides a magnetoelectric hydraulic actuator, as shown in fig. 2, the actuator output rod 4 is made of a non-magnetic material, the driving body 3 is made of a magnetic liquid, the proportion of the magnetic liquid in the closed magnetic circuit increases with the increase of the output displacement d, and the magnetic field acting on the detection assembly 2 changes with the change of d.

And finally, the driver output displacement sensing is realized.

The working principle of the utility model is as follows:

the detection assembly 2 generates a magnetic field under the excitation of the coil 22, a closed magnetic circuit is formed by the output rod 4 and the driving body 3, when the driving body 3 drives the output rod 4 to generate output displacement d, the proportion of the output rod 4 and the driving body 3 in the closed magnetic circuit is changed, so that the magnetic field acting on the magnetostrictive body 23 is finally changed, the magnetostrictive body 23 is stretched or shortened under the action of the changed magnetic field, the extrusion degree of the piezoelectric body 24 is changed, a changed voltage signal V is generated by the piezoelectric body 24, a detection voltage corresponding to the output displacement is obtained, and finally the output displacement sensing of the driver is realized.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims (10)

1. A magnetoelectric hydraulic driver is characterized by comprising a driver shell (1), a detection assembly (2), a driving body (3) and an output rod (4);

a first accommodating space (5) is arranged on the driver shell (1), and the detection assembly (2) is mounted on the driver shell (1) and arranged along the circumferential direction of the first accommodating space;

the output rod (4) comprises a first end part (41) and a second end part (42) which are connected in sequence, and the second end part (42) is installed in the first accommodating space (5) and can move under the driving of the driving body (3) and can drive the first end part (41) to move to the outside of the first accommodating space (5);

when the driving body (3) drives the output rod (4) to move, the magnetic field around the detection assembly (2) can be changed, and then the output signal of the detection assembly (2) can be changed, so that the displacement generated by the movement can be obtained.

2. Magneto-electric hydraulic drive according to claim 1, characterized in that the detection assembly (2) comprises a magnetically conductive yoke (21), a coil (22), a magnetostrictive body (23) and a piezoelectric body (24);

the magnetostrictive body (23) and the piezoelectric body (24) are sequentially mounted on the magnetic conduction magnetic yoke (21), and the coil (22) is arranged along the circumferential direction of the magnetostrictive body (23).

3. The magnetoelectric hydraulic driver according to claim 2, wherein the magnetostrictive body (23) is operable in a resonant state and a non-resonant state upon excitation of the coil (22).

4. The magnetoelectric hydraulic driver according to claim 2, wherein the magnetostrictive body (23) and the piezoelectric body (24) are made of magnetostrictive material and piezoelectric material, respectively.

5. The magnetoelectric hydraulic driver according to claim 1, wherein an end of the second end portion (42) facing the drive body (3) is movable between a first position and a second position, the first accommodation space (5) forms a second accommodation space between the first position and the second position, and the detection assembly (2) is arranged along a circumferential direction of the second accommodation space.

6. Magneto-electric hydraulic drive according to claim 1, characterized in that the drive housing (1) is made of a non-magnetic material.

7. The magneto-electric hydraulic driver of claim 6, wherein the non-magnetic conductive material is any one of plastic, aluminum alloy, and titanium alloy.

8. The magneto-electric hydraulic drive of claim 1, wherein the second end portion (42) is formed of one of:

-a magnetically permeable material;

-a permanent magnet material;

-a non-magnetically conductive material.

9. The magneto-electric hydraulic driver of claim 8, wherein the magnetic conductive material is selected from one of:

-permalloy;

-electrically pure iron;

-silicon steel;

-an amorphous alloy.

10. Magneto-electric hydraulic drive according to claim 1, wherein the drive body (3) is one of the following fluids:

-water;

-water comprising magnetic particles;

-a magnetic liquid.

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