CN214412608U

CN214412608U - Linear output magnetostrictive device

Info

Publication number: CN214412608U
Application number: CN202120495590.5U
Authority: CN
Inventors: 靳玮; 王玮; 吉雨; 王鹏; 陶嘉玮
Original assignee: Batou Light Industry Vocational Technical College
Current assignee: Batou Light Industry Vocational Technical College
Priority date: 2020-12-29
Filing date: 2021-03-08
Publication date: 2021-10-15
Anticipated expiration: 2031-03-08

Abstract

The utility model discloses a magnetostrictive device of sharp output, include: the device comprises a tubular shell, a fixed substrate, a magnetostrictive element, an electromagnetic coil, a driving rod and a sealing part, wherein a spiral cooling water channel is arranged in the middle of the tubular shell, a water inlet and a water outlet are formed in the outer wall of the tubular shell, the water inlet is communicated with the starting point of the spiral cooling water channel, and the water outlet is communicated with the end point of the spiral cooling water channel; and a heat insulation sleeve and an annular permanent magnet are sleeved outside the magnetostrictive element. The utility model discloses a set up spiral cooling water course in the tubulose casing, utilize the cooling water to the inside rapid cooling of magnetostrictive device, reduce the error of magnetostrictive device output displacement, guarantee the output displacement accuracy.

Description

Linear output magnetostrictive device

Technical Field

The utility model relates to a magnetism field. More specifically, the present invention relates to a magnetostrictive device with linear output.

Background

The rare earth giant magnetostrictive material is a novel functional material with high efficiency for electro-magnetic-mechanical transformation, and has wide application prospect in the fields of aerospace, military, sound technology, shock absorption and shock resistance, precise positioning and the like because the material has the characteristics of quick response, large strain range, strong reliability, large output, high energy density, good frequency characteristic, wide frequency band and the like. A device made of magnetostrictive material is provided with a magnetic field through an excitation solenoid to generate output displacement.

A magnetostrictive actuator is disclosed in patent CN1670977A and specifically discloses a rod-shaped magnetostrictive element made of magnetostrictive alloy, an electromagnetic coil arranged around the magnetostrictive element, a driving rod connected to one end of the magnetostrictive element, a fixed substrate connected to the other end of the magnetostrictive element, and a tubular housing enclosing the magnetostrictive element and the electromagnetic coil, wherein a permanent magnet is arranged on the tubular housing to provide a static bias field for the magnetostrictive element and to attract the driving rod to apply a pre-stress to the magnetostrictive element. However, in the technical scheme, the electromagnetic coil generates heat in the using process, and the heat is difficult to dissipate in the closed space of the tubular shell, so that the temperature of the magnetostrictive element is easily increased, the performance of the magnetostrictive element is further changed, and the accuracy that the electromagnetic coil provides a magnetic field to enable the magnetostrictive element to generate output displacement is reduced.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to solve at least the above problems and to provide at least the advantages which will be described later.

The utility model discloses a still another purpose provides a magnetostrictive device of straight line output, through set up spiral cooling water course in the tubulose casing, utilizes the cooling water to the inside rapid cooling of magnetostrictive device, reduces the error of magnetostrictive device output displacement, guarantees the accuracy.

To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a magnetostrictive device with a linear output, comprising: the device comprises a tubular shell, a fixed substrate, a magnetostrictive element, an electromagnetic coil, a driving rod and a sealing part, wherein a spiral cooling water channel is arranged in the middle of the tubular shell, a water inlet and a water outlet are formed in the outer wall of the tubular shell, the water inlet is communicated with the starting point of the spiral cooling water channel, and the water outlet is communicated with the end point of the spiral cooling water channel;

and a heat insulation sleeve and an annular permanent magnet are sleeved outside the magnetostrictive element.

Preferably, the tubular casing includes a first pipe body and a second pipe body which are the same in length, the outer diameter of the first pipe body is the same as the inner diameter of the second pipe body, the second pipe body is sleeved outside the first pipe body, a first spiral water tank is arranged in the middle of the outer wall of the first pipe body, a second spiral water tank opposite to the first spiral water tank is arranged in the middle of the inner wall of the second pipe body, the spiral cooling water channel is formed by the first spiral water tank and the second spiral water tank, the water inlet hole is formed in the second pipe body at the starting point of the second spiral water tank, and the water outlet hole is formed in the second pipe body at the end point of the second spiral water tank.

Preferably, a circle of first sealing groove is formed in the outer wall, close to the two ends, of the first pipe body, a circle of second sealing groove opposite to the first sealing groove is formed in the inner wall, close to the two ends, of the second pipe body, a ring-shaped sealing channel is formed by the first sealing groove and the second sealing groove opposite to the first sealing groove, and a sealing ring is arranged in the ring-shaped sealing channel.

Preferably, a plurality of threaded blind holes are formed in the outer wall, close to the end portion, of the first pipe body at intervals along the circumferential direction, a plurality of threaded through holes opposite to the threaded blind holes are formed in the second pipe body, the diameter and the thread specification of each threaded through hole are the same as those of the corresponding threaded blind holes, and the first pipe body is connected with the second pipe body through screws penetrating through the threaded through holes and the corresponding threaded blind holes.

Preferably, the first pipe body material is a heat conducting material, and the second pipe body material is a non-magnetic conducting material.

Preferably, the number of the annular permanent magnets is three, the three annular permanent magnets are respectively positioned at two ends and the middle part of the magnetostrictive element, and a heat insulation sleeve is arranged between every two adjacent annular permanent magnets.

The utility model discloses at least, include following beneficial effect: through set up spiral cooling water course in the tubulose casing, when the magnetostrictive device uses, advance water piping connection at the inlet opening, go out water piping connection at the apopore, utilize the cooling water to the inside rapid cooling of magnetostrictive device, reduce the heat and accumulate in magnetostrictive device is inside, magnetostrictive element performance can remain stable like this, provides the magnetic field through solenoid and lets the magnetostrictive element produce the accuracy of output displacement and also obtain guaranteeing.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a schematic side view of the present invention;

Detailed Description

The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.

It should be noted that, in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1, the present invention provides a magnetostrictive device with linear output, including: the device comprises a tubular shell 1, a fixed substrate 2, a magnetostrictive element 3, an electromagnetic coil 4, a driving rod 5 and a sealing part 6, wherein a spiral cooling water channel 7 is arranged in the middle of the tubular shell 1, a water inlet 8 and a water outlet 9 are formed in the outer wall of the tubular shell 1, the water inlet 8 is communicated with the starting point of the spiral cooling water channel 7, and the water outlet 9 is communicated with the end point of the spiral cooling water channel 7;

and a heat insulation sleeve 10 and an annular permanent magnet 11 are sleeved outside the magnetostrictive element 3.

This embodiment is in the use, through set up spiral cooling water course 7 in tubular casing 1, when the magnetostrictive device uses, advance water piping connection at the inlet opening 8, go out water piping connection at apopore 9, let in low-temperature cooling water in the inlet opening, the interior outflow of outlet opening takes away thermal warm water, utilize the cooling water to the inside rapid cooling of magnetostrictive device, reduce the heat and accumulate in magnetostrictive device inside, magnetostrictive element 3 performance can remain stable like this, provide the accuracy that magnetic field let magnetostrictive element 3 produce output displacement through solenoid 4 and also can obtain guaranteeing.

In another embodiment, the tubular housing 1 includes a first tube 101 and a second tube 102 having the same length, an outer diameter of the first tube 101 is the same as an inner diameter of the second tube 102, the second tube 102 is sleeved outside the first tube 101, a first spiral water groove is formed in a middle portion of an outer wall of the first tube 101, a second spiral water groove opposite to the first spiral water groove is formed in a middle portion of an inner wall of the second tube 102, the spiral cooling water passage 7 is formed by the first spiral water groove and the second spiral water groove, the water inlet hole 8 is formed at a starting point of the second spiral water groove on the second tube 102, and the water outlet hole 9 is formed at an end point of the second spiral water groove on the second tube 102.

In the former embodiment, need set up spiral cooling water course 7 in tubulose casing 1, and adopt the current tubulose casing 1 degree of difficulty of pouring or the technology of moulding plastics preparation this structure great, so in this embodiment, be first body 101 and second body 102 with the 1 split of tubulose casing, through seting up first spiral basin at first body 101 outer wall, set up second spiral basin at second body 102 inner wall, greatly reduced the 1 preparation degree of difficulty of tubulose casing of above-mentioned structure, simultaneously if spiral cooling water course 7 appears blockking up, the first body 101 of split and second body 102 can be maintained, it is more convenient to use.

In another embodiment, a circle of first sealing grooves are respectively formed on the outer walls of the first pipe 101 near both ends, and a circle of second sealing grooves opposite to the first sealing grooves are respectively formed on the inner walls of the second pipe 102 near both ends, the first sealing grooves and the second sealing grooves opposite to the first sealing grooves form an annular sealing channel, and a sealing ring 12 is disposed in the annular sealing channel.

In the former embodiment, since the tubular housing 1 is divided into the first tube 101 and the second tube 102, and the spiral cooling water passage 7 is also divided into two parts, the cooling water may leak from the gap between the first tube 101 and the second tube 102 during the flow of the cooling water in the spiral cooling water passage 7, and the sealing rings 12 are further provided outside both ends of the spiral cooling water passage 7 to prevent the leaking water from flowing into the magnetostrictive device from the gap between the first tube 101 and the second tube 102 to cause the short circuit of the electromagnetic coil 4.

In another embodiment, the outer wall of the first tube 101 near the end is provided with a plurality of threaded blind holes 14 at regular intervals along the circumferential direction, the second tube 102 is provided with a plurality of threaded through holes 13 opposite to the threaded blind holes 14, the threaded through holes 13 and the threaded blind holes 14 have the same hole diameter and thread specification, and the first tube 101 and the second tube 102 are connected by screws penetrating through the threaded through holes 13 and the threaded blind holes 14.

In the former embodiment, the first pipe 101 and the second pipe 102 may be connected by welding, however, after welding, the first pipe 101 and the second pipe 102 are not easily disassembled, and maintenance of the magnetostrictive device is not convenient, so in the present embodiment, the first pipe 101 and the second pipe 102 are connected by screwing.

In another embodiment, the first pipe 101 is made of a heat conductive material, and the second pipe 102 is made of a non-magnetic conductive material, wherein the first pipe 101 needs to transmit heat dissipated from the electromagnetic coil 4, so that a material with good heat conductivity is required, and the second pipe 102 needs to shield the magnetic field of the permanent magnet inside the magnetostrictive device from other magnetic components outside the magnetostrictive device, and simultaneously avoid the influence of the external magnetic field on the internal magnetostrictive element 3, so that the second pipe needs to be made of a non-magnetic conductive material. Since copper, aluminum, zinc, stainless steel, and the like are all metals, which have good thermal conductivity and are not magnetically conductive, the material of the first tube 101 and the material of the second tube 102 can be selected from them.

In another embodiment, three annular permanent magnets 11 are provided, which are respectively located at two ends and in the middle of the magnetostrictive element 3, and an insulating sleeve 10 is provided between two adjacent annular permanent magnets 11, wherein the magnetic field of the static sheet around the magnetostrictive element 3 can be more uniform by providing the annular permanent magnets 11 at two ends and in the middle of the magnetostrictive element 3.

In the above embodiment, by redesigning the structure of the tubular housing 1 and redesigning the position of the permanent magnet, the heat dissipation of the magnetostrictive device is better realized and the accuracy of the output displacement of the magnetostrictive device is ensured under the condition of ensuring that the overall dimension of the magnetostrictive device does not change much.

While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.

Claims

1. A linear output magnetostrictive device comprising: the device comprises a tubular shell, a fixed substrate, a magnetostrictive element, an electromagnetic coil, a driving rod and a sealing part, and is characterized in that a spiral cooling water channel is arranged in the middle of the tubular shell, a water inlet and a water outlet are formed in the outer wall of the tubular shell, the water inlet is communicated with the starting point of the spiral cooling water channel, and the water outlet is communicated with the end point of the spiral cooling water channel;

2. The magnetostrictive device according to claim 1, wherein the tubular casing comprises a first tubular body and a second tubular body which have the same length, the outer diameter of the first tubular body is the same as the inner diameter of the second tubular body, the second tubular body is sleeved outside the first tubular body, a first spiral water groove is formed in the middle of the outer wall of the first tubular body, a second spiral water groove opposite to the first spiral water groove is formed in the middle of the inner wall of the second tubular body, the spiral cooling water groove is formed by the first spiral water groove and the second spiral water groove, the water inlet hole is formed in the second tubular body at the starting point of the second spiral water groove, and the water outlet hole is formed in the second tubular body at the end point of the second spiral water groove.

3. The magnetostrictive device according to claim 2, wherein the outer wall of the first pipe body near both ends is provided with a circle of first sealing groove, the inner wall of the second pipe body near both ends is provided with a circle of second sealing groove opposite to the first sealing groove, the first sealing groove and the second sealing groove opposite to the first sealing groove form an annular sealing channel, and a sealing ring is arranged in the annular sealing channel.

4. The magnetostrictive device according to claim 2, wherein the outer wall of the first pipe body near the end is provided with a plurality of threaded blind holes at even intervals along the circumferential direction, the second pipe body is provided with a plurality of threaded through holes opposite to the threaded blind holes, the threaded through holes and the threaded blind holes have the same diameter and thread specifications, and the first pipe body and the second pipe body are connected by screws penetrating through the threaded through holes and the threaded blind holes.

5. A magnetostrictive device as claimed in claim 2, wherein said first body material is a thermally conductive material and said second body material is a non-magnetically conductive material.

6. The magnetostrictive device according to claim 1, wherein three of the annular permanent magnets are provided at both ends and in the middle of the magnetostrictive element, and an insulating sleeve is provided between two adjacent annular permanent magnets.