CN112983680B - Adjusting mechanism of pintle injector driven by magnetostrictive material - Google Patents

Adjusting mechanism of pintle injector driven by magnetostrictive material Download PDF

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Publication number
CN112983680B
CN112983680B CN202110232130.8A CN202110232130A CN112983680B CN 112983680 B CN112983680 B CN 112983680B CN 202110232130 A CN202110232130 A CN 202110232130A CN 112983680 B CN112983680 B CN 112983680B
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China
Prior art keywords
magnetostrictive
pintle injector
needle valve
housing
adjustment mechanism
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CN202110232130.8A
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Chinese (zh)
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CN112983680A (en
Inventor
张源俊
俞南嘉
李天文
龙治光
赵亚明
赵增
韩树焘
周闯
任杰
冯浩
王树文
龚昊杰
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Beihang University
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Beihang University
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02K—JET-PROPULSION PLANTS
    • F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
    • F02K9/42—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using liquid or gaseous propellants
    • F02K9/44—Feeding propellants
    • F02K9/52—Injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02K—JET-PROPULSION PLANTS
    • F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
    • F02K9/42—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using liquid or gaseous propellants
    • F02K9/44—Feeding propellants
    • F02K9/56—Control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02K—JET-PROPULSION PLANTS
    • F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
    • F02K9/42—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using liquid or gaseous propellants
    • F02K9/44—Feeding propellants
    • F02K9/56—Control
    • F02K9/58—Propellant feed valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02K—JET-PROPULSION PLANTS
    • F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
    • F02K9/42—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using liquid or gaseous propellants
    • F02K9/60—Constructional parts; Details not otherwise provided for
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
    • H02N2/04—Constructional details

Abstract

The invention provides a pintle injector adjustment mechanism driven by magnetostrictive materials, which comprises: a housing; the needle valve connecting piece is arranged in the shell in a sliding manner; the magnetostriction body is arranged in the shell, one end of the magnetostriction body is abutted against the shell, and the other end of the magnetostriction body is connected with the needle valve connecting piece; and a magnetic field generating member. The magnetic field generating member generates a magnetic field in a first direction, and the magnetostrictive body deforms in the first direction. The magnetostrictive body pushes the needle valve connecting piece to slide along the first direction, so that a needle valve of the pintle injector is driven to move, and the opening of the pintle injector is adjusted. When the magnetic field generating piece generates magnetic fields with different magnetic field strengths, the moving distances of the needle valve are also different. The deformation response time of the magnetostriction body is microsecond magnitude, and the magnetostriction body can quickly react when the opening of the pintle injector is adjusted, so that the stability of the pintle type variable thrust rocket engine during working condition change is enhanced, and the reliability of the whole pintle injector system is improved.

Description

Adjusting mechanism of pintle injector driven by magnetostrictive material
Technical Field
The invention relates to the field of pintle variable thrust rocket engines, in particular to a pintle injector adjusting mechanism driven by magnetostrictive materials.
Background
The pintle injector is an important component of a pintle variable thrust rocket engine, the control of the propellant injection state can be realized by adjusting the opening of the pintle injector, so that variable thrust is realized, and the adjustment of the opening of the pintle injector is also a main means for realizing the variable thrust of the engine.
The existing pintle injector is often required to be externally connected with a complex mechanism for adjustment, the structure of the whole pintle injector system is complex, the response time is long when the opening of the pintle injector is adjusted, the instability of the pintle type variable thrust rocket engine during working condition conversion is increased, and the reliability of the pintle injector system is low.
Disclosure of Invention
In order to solve the problems of increased instability and low reliability caused by long response time when the opening of a pintle injector is adjusted in the prior art, the invention aims to provide a pintle injector adjusting mechanism driven by magnetostrictive materials.
The invention provides the following technical scheme:
a magnetostrictive material driven pintle injector adjustment mechanism for use with a pintle injector, the magnetostrictive material driven pintle injector adjustment mechanism comprising:
a housing for connection to the pintle injector;
the needle valve connecting piece is arranged in the shell in a sliding mode along a first direction and is used for being connected with a needle valve of the pintle injector;
the magnetostrictive body is arranged in the shell, one end of the magnetostrictive body along the first direction is abutted against the shell, and the other end of the magnetostrictive body along the first direction is connected with the needle valve connecting piece; and
and the magnetic field generating piece is used for generating magnetic fields with different magnetic field strengths along the first direction.
As a further alternative to the adjusting mechanism of the pintle injector driven by the magnetostrictive material, one end of the housing along the first direction is open, and a connecting bracket is provided, and the connecting bracket is detachably connected to the housing and is used for being connected to the pintle injector.
As a further alternative to the magnetostrictive material driven pintle injector adjustment mechanism, a spring is included that urges the needle valve connector to move toward the magnetostrictive body.
As a further alternative to the adjusting mechanism of the pintle injector driven by the magnetostrictive material, one end of the housing along the first direction is open, and a connecting bracket is provided, and the connecting bracket is detachably connected to the housing and is used for connecting to the pintle injector;
the needle valve connecting piece is provided with a convex block, the needle valve connecting piece faces away from one end of the magnetostrictive body and slides to penetrate through the connecting support, the spring sleeve is arranged on the needle valve connecting piece, one end of the spring is back to the convex block, one side of the magnetostrictive body is abutted, and the other end of the spring is abutted to the connecting support.
As a further alternative to the magnetostrictive material driven pintle injector adjustment mechanism, the device further comprises a cooling element for cooling the magnetostrictive body.
As a further optional scheme of the pintle injector adjustment mechanism driven by the magnetostrictive material, the cooling member is a cooling pipe, the cooling pipe is attached to the surface of the magnetostrictive body, the cooling pipe is made of a heat conducting material, and a cooling medium flows through the cooling pipe.
As a further alternative to the magnetostrictive material driven pintle injector adjustment mechanism, the cooling tube is helically wrapped around the magnetostrictive body.
As a further optional solution for the adjusting mechanism of the pintle injector driven by the magnetostrictive material, the magnetostrictive body is in a strip shape, the magnetostrictive body is arranged along the first direction, the magnetic field generating element is a coil, and the coil is arranged around the magnetostrictive body.
As a further alternative to the adjusting mechanism of the pintle injector driven by the magnetostrictive material, a coil bobbin is sleeved on the magnetostrictive body, and the coil is wound on the coil bobbin.
As a further optional scheme of the adjusting mechanism of the pintle injector driven by the magnetostrictive material, a pre-tightening bolt penetrates through the housing, the pre-tightening bolt is in threaded fit with the housing, and one end, back to the needle valve connecting piece, of the magnetostrictive body abuts against the housing through the pre-tightening bolt.
The embodiment of the invention has the following beneficial effects:
the magnetic field generating member generates a magnetic field in a first direction, and the magnetostrictive body deforms in the first direction. The magnetostrictive body pushes the needle valve connecting piece to slide along the first direction, so that a needle valve of the pintle injector is driven to move, and the opening of the pintle injector is adjusted. When the magnetic field generating piece generates magnetic fields with different magnetic field strengths, the deformation amplitudes of the magnetostriction bodies are different, and the moving distances of the needle valve connecting piece and the needle valve are also different.
The deformation response time of the magnetostriction body is microsecond magnitude, and the magnetostriction body can quickly react when the opening of the pintle injector is adjusted, so that the stability of the pintle type variable thrust rocket engine during working condition change is enhanced, and the reliability of the whole pintle injector system is improved.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible and comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram showing the overall structure of a magnetostrictive material driven pintle injector adjustment mechanism provided in embodiment 1 of the present invention;
FIG. 2 is a schematic diagram showing the engagement of a magnetostrictive material driven pintle injector adjustment mechanism with the head of a pintle injector provided in embodiment 1 of the present invention;
FIG. 3 is a schematic diagram showing the overall structure of a magnetostrictive material driven pintle injector adjustment mechanism provided in embodiment 2 of the present invention;
FIG. 4 shows an enlarged schematic view at A in FIG. 3;
FIG. 5 is a schematic diagram showing the structure of the housing of the magnetostrictive material driven pintle injector adjustment mechanism provided in embodiment 2 of the present invention;
FIG. 6 is a schematic diagram showing the connection among the needle valve connector, the housing and the connecting bracket in the adjusting mechanism of the magnetostrictive material driven pintle injector provided in embodiment 2 of the invention;
FIG. 7 is a schematic diagram showing the construction of a needle valve linkage in a magnetostrictive material driven pintle injector adjustment mechanism provided in embodiment 2 of the present invention;
FIG. 8 is a schematic view showing the structure of a connecting bracket in an adjusting mechanism of a magnetostrictive material driven pintle injector provided in embodiment 2 of the invention;
FIG. 9 is a schematic diagram showing the structure of the bobbin in the adjustment mechanism of the magnetostrictive material driven pintle injector provided in embodiment 2 of the present invention;
FIG. 10 is a schematic diagram showing the engagement of a magnetostrictive material driven pintle injector adjustment mechanism with the head of a pintle injector according to embodiment 2 of the present invention.
Description of the main element symbols:
100-a housing; 110-pretension bolt; 200-needle valve connections; 210-a body; 220-a connector; 221-a threaded hole; 230-a bump; 300-a magnetostrictive body; 400-a magnetic field generating member; 410-a coil former; 411-a support plate; 500-connecting a stent; 510-a screw cap; 520-a hollow; 530-flange plate; 600-a spring; 700-a cooling member; 800-pintle injector.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example 1
Referring to fig. 1 and 2 together, the present embodiment provides a magnetostrictive material driven pintle injector adjustment mechanism (hereinafter, referred to as "adjustment mechanism") for adjusting the opening of the pintle injector 800 to control the propellant injection state and thus to realize the variable thrust of the rocket engine. The adjustment mechanism includes a housing 100, a needle valve connector 200, a magnetostrictive body 300, and a magnetic field generating member 400.
The housing 100 is used as a fixing and supporting member fixedly connected to the head of the pintle injector 800, and the needle valve connector 200, the magnetostrictive body 300, and the magnetic field generating member 400 are all disposed in the housing 100. Wherein the needle valve connector 200 is slidably fitted with the housing 100 in a first direction, and the needle valve connector 200 is connected with the needle valve of the pintle injector 800. One end of the magnetostrictive body 300 in the first direction abuts the housing 100, and the other end of the magnetostrictive body 300 in the first direction abuts the needle valve connector 200.
In use, the magnetic field generator 400 generates a magnetic field along a first direction at the region where the magnetostrictive body 300 is located, so that the magnetostrictive body 300 deforms along the first direction. The magnetostrictive body 300 pushes the needle valve connecting piece 200 to slide along the first direction, so as to drive the needle valve of the pintle injector 800 to move, and the opening of the pintle injector 800 is adjusted. When the magnetic field generating member 400 generates magnetic fields having different magnetic field strengths, the magnetostrictive bodies 300 have different deformation amplitudes, and the needle valve connecting member 200 and the needle valve have different moving distances.
On one hand, the deformation response time of the magnetostrictive body 300 is in the microsecond order, and the magnetostrictive body can quickly react when the opening degree of the pintle injector 800 is adjusted, so that the stability of the pintle type variable thrust rocket engine during working condition change is enhanced, and the reliability of the whole pintle injector 800 system is improved.
On the other hand, the displacement accuracy of the magnetostrictive body 300 can reach the nanometer level, and the accurate adjustment of the opening of the pintle injector 800 can be realized, thereby greatly improving the accuracy of the opening adjustment of the pintle injector 800.
Further, when the flow rate of the propellant flowing through the pintle injector 800 is large, the pressure to be overcome to adjust the opening of the pintle injector 800 is large, and the output force provided when the magnetostrictive body 300 deforms is large, so the above-described adjustment mechanism is suitable for adjusting the opening of the pintle injector 800 having a large flow rate of the propellant.
In particular, the magnetostrictive body 300 is suitable for a low frequency operating region, and can ensure better adjustment accuracy when adjusting the opening of the pintle injector 800 in a low frequency range.
Based on the material properties of the magnetostrictive body 300 itself, the above-described adjustment mechanism also has the following advantages: the magnetostrictive body 300 has no failure problem caused by polarization, aging and fatigue problems, so the adjusting mechanism has high reliability; the magnetostriction body 300 has high compressive strength which is more than 700MPa, so the adjusting mechanism can adapt to a high-pressure working environment; the magnetostrictive body 300 requires a lower operating voltage when operating, so the adjustment mechanism requires a lower voltage for the control system.
Example 2
Referring to fig. 3 to 10, the present embodiment provides a magnetostrictive material driven pintle injector adjustment mechanism (hereinafter, referred to as "adjustment mechanism") for adjusting the opening of the pintle injector 800 to control the propellant injection state, thereby realizing the variable thrust of the rocket engine. The adjusting mechanism includes a housing 100, a connecting bracket 500, a needle valve connecting member 200, a magnetostrictive body 300, a magnetic field generating member 400, a spring 600, and a cooling member 700.
Specifically, the housing 100 has a cylindrical shape, and the axial direction of the housing 100 is the first direction. One end of the housing 100 is open and a pre-tightening bolt 110 is inserted into the other end. The axis of the pretension bolt 110 coincides with the axis of the housing 100, and the pretension bolt 110 is in threaded engagement with the housing 100.
Specifically, the connection bracket 500 is composed of a screw cover 510, a hollow 520, and a flange 530, and the screw cover 510, the hollow 520, and the flange 530 are sequentially arranged in the axial direction of the housing 100.
The screw cap 510 is fastened to the open end of the housing 100 and is screwed to the housing 100. One end of the hollow portion 520 is integrally formed with the screw cap 510, and the other end is integrally formed with the flange 530, and a through hole is formed in the hollow portion 520 along a radial direction of the housing 100. The axis of the flange 530 coincides with the axis of the housing 100, and the flange 530 is fixedly connected to the head of the pintle injector 800 by screws or bolts.
Specifically, the needle valve connector 200 includes a body 210 and a connector 220, and the body 210 is further provided with a protrusion 230.
The body 210 is cylindrical, the axis of the body 210 coincides with the axis of the housing 100, and the body 210 is slidably inserted into the screw cap 510 along the axis thereof.
The protrusion 230 is disposed around the body 210, and is welded to the body 210 or integrally formed therewith. Further, the projection 230 is located inside the housing 100, the outer diameter of the projection 230 is equal to or slightly smaller than the inner diameter of the housing 100, and the projection 230 is slidably fitted with the housing 100 in the axial direction of the housing 100.
The connector 220 is cylindrical, the axis of the connector 220 coincides with the axis of the body 210, and the connector 220 and the body 210 are welded and fixed or integrally formed. In addition, the connector 220 is located inside the hollow portion 520, a threaded hole 221 is formed in the connector 220, and the threaded hole 221 is disposed along a radial line direction of the connector 220. The needle valve of the pintle injector 800 passes through the through hole of the hollow 520 and is threadedly engaged with the connector 220 through the threaded hole 221.
When the needle valve connector 200 moves in its axial direction with respect to the housing 100 and the connection bracket 500, the needle valve of the pintle injector 800 moves in the through hole.
Specifically, the magnetostrictive body 300 has a cylindrical shape and is made of a metal magnetostrictive material. The magnetostrictive body 300 is disposed inside the casing 100 with its axis coinciding with the axis of the casing 100 and with a length slightly less than the length of the casing 100. One end of the magnetostrictive body 300 abuts against the housing 100 through the preload bolt 110, and the other end abuts against the needle valve connector 200.
Specifically, the magnetic field generating member 400 employs a coil that is spirally disposed around the magnetostrictive body 300.
When the coil is energized, a magnetic field is generated in the inner periphery of the coil along the axial direction of the housing 100, and the magnetic field strength of the magnetic field changes with the change of the magnitude of the current. The magnetostrictive body 300 is in the magnetic field, and deforms along the axial direction of the casing 100, and the magnitude of the deformation depends on the magnitude of the magnetic field, that is, the magnitude of the current.
After the magnetostrictive body 300 deforms along the axial direction of the casing 100, the needle valve connecting piece 200 is pushed to slide, so that the needle valve of the pintle injector 800 is driven to move, and the opening of the pintle injector 800 is adjusted. The opening of the pintle injector 800 can be adjusted by adjusting the current.
On one hand, the response time of the magnetostrictive body 300 when being deformed is in the microsecond order, and the magnetostrictive body can quickly react when the opening of the pintle injector 800 is adjusted, so that the stability of the pintle type variable thrust rocket engine during working condition conversion is enhanced, and the reliability of the whole pintle injector 800 system is improved.
On the other hand, the displacement accuracy of the magnetostrictive body 300 can reach the nanometer level, and the accurate adjustment of the opening of the pintle injector 800 can be realized. In particular, the magnetostrictive body 300 is suitable for a low frequency operating region, and can ensure better adjustment accuracy when adjusting the opening of the pintle injector 800 in a low frequency range.
On the whole, the adjusting mechanism directly converts the deformation of the magnetostrictive body 300 into the displacement output of the needle valve through the needle valve connecting piece 200, so as to adjust the opening of the pintle injector 800, reduce the transmission links, and have compact structure and high reliability.
When the flow rate of propellant through the pintle injector 800 is greater, the pressure to be overcome to adjust the opening of the pintle injector 800 is greater. In this embodiment, the magnetostrictive body 300 provides a large output force when deformed, so the adjustment mechanism described above is suitable for adjusting the opening of a pintle injector 800 with a large propellant flow.
Based on the material properties of the magnetostrictive body 300 itself, the above-described adjustment mechanism also has the following advantages: the magnetostrictive body 300 has no failure problem caused by polarization, aging and fatigue problems, so the adjusting mechanism has high reliability; the compressive strength of the magnetostrictive body 300 is more than 700MPa, so the adjusting mechanism can adapt to a high-pressure working environment; the magnetostrictive body 300 requires a lower operating voltage when operating, so the adjustment mechanism requires a lower voltage for the control system.
Further, the magnetostrictive body 300 is sleeved with a coil bobbin 410, and the coil bobbin 410 is made of an insulating material. The bobbin 410 is cylindrical, annular support plates 411 are integrally formed at both ends of the bobbin 410, and the outer diameter of the support plates 411 is equal to the inner diameter of the housing 100. The coil is wound around the bobbin 410, spaced apart from the magnetostrictive body 300. When the magnetostrictive body 300 deforms, the coil does not move with the magnetostrictive body 300, and the uniform distribution of the magnetic field is ensured.
Specifically, the spring 600 is a disc spring. The spring 600 is disposed on the body 210 and between the protrusion 230 and the screw cap 510. The spring 600 is always in a compressed state, driving the needle valve connector 200 to abut against the end face of the magnetostrictive body 300, and avoiding the idle stroke between the needle valve connector 200 and the magnetostrictive body 300.
In the process of deformation of the magnetostrictive body 300, the needle valve connector 200 is always kept in close contact with the magnetostrictive body 300 and moves along with the deformation of the magnetostrictive body 300. In particular, when the magnetostrictive body 300 shortens, the needle valve connecting piece 200 retracts following the magnetostrictive body 300 under the action of the spring 600, and the adjusting mechanism is guaranteed to have a sufficiently fast response speed.
Further, by screwing the preload bolt 110 and changing the depth of penetration of the preload bolt 110 into the housing 100, the initial position of the magnetostrictive body 300 can be adjusted. The initial position of the needle valve connector 200 is also changed synchronously with the magnetostrictive body 300 by the spring 600.
Specifically, the cooling member 700 employs a copper cooling pipe. The cooling pipe is located between the magnetostrictive body 300 and the coil bobbin 410, attached to the side wall of the magnetostrictive body 300, and spirally wound around the magnetostrictive body 300.
The cooling medium is introduced into the cooling pipe, and the cooling medium exchanges heat with the magnetostrictive body 300 through the pipe wall of the cooling pipe to absorb heat on the magnetostrictive body 300, so that the magnetostrictive body 300 is cooled, and the phenomenon that the magnetostrictive body 300 loses the deformation characteristic due to overhigh temperature under high magnetic field strength is avoided.
After the cooling piece 700 is arranged, the adjusting mechanism can adapt to a high-temperature working environment, and the reliability is further improved. Further, by adjusting the flow rate and temperature of the cooling medium, precise control of the temperature of the magnetostrictive body 300 can be achieved.
In all examples shown and described herein, any particular value should be construed as merely exemplary, and not as a limitation, and thus other examples of example embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above examples are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims (9)

1. A magnetostrictive material driven pintle injector adjustment mechanism, for application to a pintle injector, the magnetostrictive material driven pintle injector adjustment mechanism comprising:
a housing for connection to the pintle injector;
the needle valve connecting piece is arranged in the shell in a sliding mode along a first direction and is used for being connected with a needle valve of the pintle injector;
the magnetostrictive body is arranged in the shell, one end of the magnetostrictive body along the first direction is abutted against the shell, and the other end of the magnetostrictive body along the first direction is connected with the needle valve connecting piece; and
the magnetic field generating piece is used for generating magnetic fields with different magnetic field strengths along the first direction;
the needle valve connecting piece is driven to move towards the magnetostrictive body by the spring.
2. The magnetostrictive material driven pintle injector adjustment mechanism according to claim 1, wherein the housing is open at one end in the first direction and is provided with a connection bracket, the connection bracket being detachably connected to the housing, the connection bracket being adapted to be connected to the pintle injector.
3. The magnetostrictive material driven pintle injector adjustment mechanism according to claim 1, wherein the housing is open at one end in the first direction and is provided with a connection bracket, the connection bracket being detachably connected to the housing, the connection bracket being adapted to be connected to the pintle injector;
the needle valve connecting piece is provided with a convex block, the needle valve connecting piece faces away from one end of the magnetostrictive body and slides to penetrate through the connecting support, the spring sleeve is arranged on the needle valve connecting piece, one end of the spring is back to the convex block, one side of the magnetostrictive body is abutted, and the other end of the spring is abutted to the connecting support.
4. The magnetostrictive material driven pintle injector adjustment mechanism according to claim 1, further comprising a cooling member for cooling the magnetostrictive body.
5. The magnetostrictive-material-driven pintle injector adjustment mechanism according to claim 4, wherein the cooling element is a cooling tube, the cooling tube is attached to the surface of the magnetostrictive body, the cooling tube is made of a heat-conducting material, and a cooling medium flows through the cooling tube.
6. The magnetostrictive material driven pintle injector adjustment mechanism according to claim 5, wherein the cooling tube is helically wrapped around the magnetostrictive body.
7. The magnetostrictive material driven pintle injector adjustment mechanism according to claim 1, wherein the magnetostrictive body is elongated and arranged in the first direction, the magnetic field generating element is a coil, and the coil is arranged around the magnetostrictive body.
8. The magnetostrictive material driven pintle injector adjustment mechanism according to claim 7, wherein a coil former is sleeved on the magnetostrictive body, and the coil is wound on the coil former.
9. The magnetostrictive material driven pintle injector adjustment mechanism according to claim 1, wherein a pre-tightening bolt is arranged on the housing in a penetrating manner, the pre-tightening bolt is in threaded fit with the housing, and an end of the magnetostrictive body facing away from the needle valve connector is abutted against the housing through the pre-tightening bolt.
CN202110232130.8A 2021-03-02 2021-03-02 Adjusting mechanism of pintle injector driven by magnetostrictive material Active CN112983680B (en)

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CN112983680B true CN112983680B (en) 2022-04-26

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CN101844380B (en) * 2009-03-26 2012-04-18 北京化工大学 Hot runner nozzle device of giant magnetostrictive material driver
US8113179B1 (en) * 2010-08-10 2012-02-14 Great Plains Diesel Technologies, L.C. Programmable diesel fuel injector
CN102359643B (en) * 2011-10-18 2013-01-09 北京航空航天大学 Switch valve driven by magnetostrictive actuator
CN202371267U (en) * 2011-12-16 2012-08-08 河南科技大学 Pre-pressing mechanism based on giant-magneto actuator flow valve
CN104018955A (en) * 2014-06-13 2014-09-03 中国航天科技集团公司第六研究院第十一研究所 Large-scale thrust control injector
JP6733701B2 (en) * 2018-05-10 2020-08-05 株式会社デンソー Injector
CN111594351B (en) * 2020-06-12 2022-02-22 中国人民解放军战略支援部队航天工程大学 Variable thrust pintle injector

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