CN112879180A - Compact pintle injector adjustment mechanism - Google Patents
Compact pintle injector adjustment mechanism Download PDFInfo
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- CN112879180A CN112879180A CN202110231599.XA CN202110231599A CN112879180A CN 112879180 A CN112879180 A CN 112879180A CN 202110231599 A CN202110231599 A CN 202110231599A CN 112879180 A CN112879180 A CN 112879180A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims abstract description 36
- 230000033001 locomotion Effects 0.000 claims abstract description 21
- 238000009434 installation Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 16
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
- B64G1/40—Arrangements or adaptations of propulsion systems
- B64G1/401—Liquid propellant rocket engines
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
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- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The present application relates to the field of space propulsion technology, and more particularly, to a compact pintle injector adjustment mechanism. The compact pintle injector adjustment mechanism comprises a fixed frame, a through-hole servo motor and a transmission assembly; the end part of the fixed frame is connected with the head part of the pintle injector, and the through hole type servo motor and the transmission assembly are arranged in the fixed frame; the stator of the through hole type servo motor is connected with the fixed frame, the rotor of the through hole type servo motor is connected with the transmission assembly, and the transmission assembly is used for converting the rotary motion output by the through hole type servo motor into linear motion and is connected with the moving part of the pintle injector; at least part of the transmission assembly is arranged in the through hole of the through hole type servo motor. The compact pintle injector adjusting mechanism is compact in mechanical structure, can be tightly combined with a pintle injector head structure, reduces the structural size of a pintle injector system, and improves the system reliability of a pintle type variable thrust rocket engine.
Description
Technical Field
The present application relates to the field of space propulsion technology, and more particularly, to a compact pintle injector adjustment mechanism.
Background
The pintle injector is an important component of a pintle variable thrust rocket engine, the adjustment of the pintle injector is a main means for realizing the variable thrust of the engine, and the control on the propellant injection state can be realized by adjusting the pintle injector, so that the variable thrust is realized.
The existing pintle injector usually needs to be externally connected with a complex driving and transmission mechanism to adjust a movable part of the pintle injector, so that the whole pintle injector system is large in volume and multiple in parts, and the system reliability of the whole rocket engine is reduced.
Disclosure of Invention
The aim of the application is to provide a compact pintle injector adjustment mechanism for adjusting the opening of a pintle injector, and the device is more compact.
The application provides a compact pintle injector adjustment mechanism, comprising a fixed frame, a through-hole servo motor and a transmission assembly;
the end part of the fixed frame is connected with the head part of a pintle injector, and the through hole type servo motor and the transmission assembly are arranged in the fixed frame;
the stator of the through hole type servo motor is connected with the fixed frame, the rotor of the through hole type servo motor is connected with the transmission assembly, and the transmission assembly is used for converting the rotary motion output by the through hole type servo motor into linear motion and is connected with a moving part of the pintle injector;
at least part of the transmission assembly is arranged in the through hole of the through hole type servo motor.
In the above technical solution, further, the transmission assembly includes a screw shaft and a nut;
the nut is sleeved on the screw shaft and connected with the rotor;
one end of the screw shaft extends into the through hole of the through hole type servo motor and can move axially relative to the through hole, the other end of the screw shaft extends out of the fixed frame, and the fixed frame can limit the rotation of the screw shaft;
one end of the screw shaft, which is far away from the through hole type servo motor, is connected with the moving part so as to push and pull the moving part.
In the above technical solution, further, the nut includes a connecting portion and an insertion portion;
the connecting part is connected with the rotor, and the embedding part can be arranged in the through hole of the through hole type servo motor.
In the above technical solution, further, the transmission assembly further includes a connecting seat;
the connecting seat is positioned between the rotor and the nut, a through hole is formed in the middle of the connecting seat, and the inserting part penetrates through the through hole;
one end of the connecting seat is connected with the end face of the rotor, a mounting groove communicated with the through hole is formed in the other end of the connecting seat, and the connecting portion is arranged in the mounting groove.
In the above technical solution, further, the fixing frame includes a frame main body and a mounting seat connected to each other;
the through hole type servo motor is connected with the frame main body, and the mounting seat is connected with the head of the pintle injector;
the mounting seat is provided with a polygonal hole for allowing the screw shaft to pass through, the cross section of the corresponding position of the screw shaft is polygonal, the screw shaft can move along the axial direction relative to the polygonal hole, and the polygonal hole is used for limiting the rotation of the screw shaft.
In the above technical solution, further, the fixing frame further includes a locking member;
a ring table is formed on one side, facing the frame main body, of the mounting seat surface, an annular groove is formed in the circumferential direction of the ring table, and a plurality of strip-shaped holes corresponding to the annular groove are formed in the frame main body;
the retaining member includes installation department and joint portion, the installation department centre gripping in the ring channel with between the frame main part, be located the installation department both ends joint portion is respectively from adjacent the tip in bar hole runs through, just joint portion do not protrude in frame main part surface.
In the above technical solution, further, the transmission assembly further includes a connecting member;
one end of the connecting piece is connected with the screw shaft, and the other end of the connecting piece is connected with the moving part;
a raised part is formed in the middle of one side, facing the frame body, of the mounting seat surface, and the raised part is provided with the polygonal hole; one side of the bulge part facing the moving part forms a cavity for accommodating the connecting piece.
In the above technical solution, further, the connecting member is provided with a connecting hole, and a fastening member passes through the connecting hole to connect the moving part;
the circumference of the protruding part is provided with an operation hole, so that a fastener can conveniently enter the cavity from the operation hole.
In the above technical solution, further, the frame main body includes a top cover, a pillar, and a connection ring;
the top cover and the connecting ring are arranged at intervals, the stand column is used for connecting the top cover and the connecting ring, the connecting ring is connected with the mounting seat, and the top cover is positioned on the side of the through hole type servo motor and is connected with a stator of the through hole type servo motor;
the top cover, the upright post and the connecting ring are surrounded to form an accommodating cavity matched with the circumferential shape of the through hole type servo motor.
In the above technical solution, further, the device further comprises an angle sensor;
and a gap is formed between the top cover and the through hole type servo motor to install the angle sensor, and the angle sensor is used for detecting the rotation angle of the rotor of the through hole type servo motor.
Compared with the prior art, the beneficial effect of this application is:
the present application provides a compact pintle injector adjustment mechanism comprising a fixed frame, a through-hole servo motor, and a drive assembly. The end part of the fixed frame is connected with the head part of the pintle injector, and the through hole type servo motor and the transmission assembly are arranged in the fixed frame; the fixing frame forms a main body supporting structure for fixing the through-hole type servo motor and the transmission assembly and accommodating them therein, so that the structure is more compact.
The stator of the through hole type servo motor is connected with the fixed frame, namely the motor is arranged on the fixed frame; the rotor of the through hole type servo motor is connected with the transmission assembly, and the transmission assembly is used for converting the rotary motion output by the through hole type servo motor into linear motion and is connected with the moving part of the pintle injector, so that the pushing and pulling effects on the moving part are realized.
Mutual rotation between through-hole servo motor's stator and the rotor will be connected with the rotor partly arrange through-hole servo motor's through-hole in, transmission assembly has taken the partial space of through-hole servo motor's through-hole promptly, compares in the motor of output shaft evagination, and the structural style of this application is littleer to the space that occupies, and the structure is compacter.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic cross-sectional structural view of a compact pintle injector adjustment mechanism provided herein;
fig. 2 is a schematic structural diagram of a through-hole servo motor provided in the present application;
FIG. 3 is a schematic structural view of a nut provided herein;
fig. 4 is a schematic structural diagram of the connection socket provided in the present application;
FIG. 5 is a schematic structural view of a mounting base provided herein;
fig. 6 is a schematic view of an assembly structure of the frame body and the mounting seat provided by the present application.
In the figure: 101-a fixed frame; 102-through-hole servo motor; 103-angle sensor; 104-a stator; 105-a rotor; 106-a via; 107-screw shaft; 108-a nut; 109-a connecting portion; 110-an embedding part; 111-a connecting seat; 112-a through hole; 113-a mounting groove; 114-a frame body; 115-a mount; 116-polygonal holes; 117-a locking member; 118-a ring stand; 119-an annular groove; 120-a mounting portion; 121-a snap-in part; 122-a connector; 123-a boss; 124-connecting hole; 125-operation hole; 126-a top cover; 127-upright column; 128-a connecting ring; 129-bar shaped holes.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Example one
Referring to fig. 1 to 6, the present application provides a compact pintle injector adjustment mechanism comprising a fixed frame 101, a through-hole servo motor 102 and a drive assembly. The end part of the fixed frame 101 is connected with the head part of the pintle injector, and the through hole type servo motor 102 and the transmission component are arranged in the fixed frame 101; the fixing frame 101 forms a main body supporting structure for fixing the through-hole type servo motor 102 and the transmission assembly and accommodating them therein to make the structure more compact.
The stator 104 of the through hole type servo motor 102 is connected with the fixed frame 101, namely, the motor is arranged on the fixed frame 101; the rotor 105 of the through hole type servo motor 102 is connected with a transmission assembly, the transmission assembly is used for converting the rotary motion output by the through hole type servo motor 102 into linear motion, and is connected with a moving part of the pintle injector, so that the pushing and pulling action on the moving part is realized.
The stator 104 and the rotor 105 of the through-hole servo motor 102 rotate with each other, and a part of the transmission assembly connected with the rotor 105 is placed in the through hole 106 of the through-hole servo motor 102, namely, the transmission assembly occupies a part of the space of the through hole 106 of the through-hole servo motor 102.
In an alternative to this embodiment, the transmission assembly includes a threaded shaft 107 and a nut 108. The nut 108 is sleeved on the threaded shaft 107, the nut 108 is connected with the rotor 105, and the rotor 105 drives the nut 108 to rotate; one end of the screw shaft 107 extends into the through hole 106 of the through hole servo motor 102 and can move in the axial direction relative to the through hole 106, and the through hole 106 of the through hole servo motor 102 does not affect the axial movement of the screw shaft 107.
The other end of the screw shaft 107 protrudes out of the fixed frame 101 to be connected with the moving member, thereby pushing and pulling the moving member. In order to avoid the nut 108 driving the screw shaft 107 to rotate, the fixing frame 101 needs to limit the rotation of the screw shaft 107, so that the screw shaft 107 can only transmit axial movement, and thus the rotational movement output by the through hole type servo motor 102 is converted into linear movement, and for the engagement control between the nut 108 and the screw shaft 107, the idle stroke of the adjustment process can be zero, thereby improving the reliability and accuracy of the opening adjustment of the pintle injector.
Further, the present application may adjust the structural dimensions for the requirements of a specific pintle injector adjustment range, and in particular, may effectively reduce the structural volume of the pintle injector system by changing the stroke length of the screw shaft 107, which has significant advantages over the complex adjustment mechanisms of currently used pintle injectors.
In an alternative of this embodiment, the nut 108 includes a connecting portion 109 and an insertion portion 110; the connection portion 109 is connected to the rotor 105, and the insertion portion 110 can be placed in the through hole 106 of the through hole type servo motor 102. That is, the insertion portion 110 of the nut 108 also uses the space of the through hole 106 of the through hole type servo motor 102, so that the length of the screw can be extended, and the connection range of the screw shaft 107 and the screw is larger, so that the movement of the screw shaft 107 in the nut 108 is more smooth.
In an optional solution of this embodiment, the transmission assembly further includes a connection seat 111; the connecting seat 111 is positioned between the rotor 105 and the nut 108, a through hole 112 is formed in the middle of the connecting seat 111, and the inserting part 110 penetrates through the through hole 112; one end of connecting seat 111 is connected with the end surface of rotor 105, and the other end of connecting seat 111 is formed with mounting groove 113 communicated with through hole 112, and connecting portion 109 is placed in mounting groove 113.
In this embodiment, as shown in fig. 1 and 4, one end of connecting seat 111 is attached to an end surface of rotor 105, and may be fastened by a bolt, so that connecting seat 111 and rotor 105 are reliably connected; the other end of the connection seat 111 is formed with a mounting groove 113 matched with the shape of the connection part 109 so that the connection part 109 is placed therein and fastened by a bolt, thereby reducing the mounting volume; and the mounting groove 113 and the connecting portion 109 are both non-circular structures, which can prevent the mounting groove 113 and the connecting portion 109 from generating relative movement in the rotation direction, so as to ensure that the rotor 105, the connecting seat 111 and the nut 108 rotate synchronously.
Example two
The compact pintle injector adjustment mechanism of this second embodiment is an improvement over the first embodiment, and the technical contents disclosed in the first embodiment are not repeated.
Referring to fig. 6, in an alternative embodiment, the fixing frame 101 includes a frame main body 114 and a mounting seat 115 connected to each other; the through-hole servo motor 102 is connected with the frame main body 114 to fix the through-hole servo motor 102; the mounting 115 is attached to the head of the pintle injector, thereby securing the entire device to the head of the pintle injector.
In order to limit the rotation direction of the screw shaft 107, the mounting seat 115 is formed with a polygonal hole 116 for allowing the screw shaft 107 to pass through, and the cross section of the corresponding position of the screw shaft 107 is polygonal, and the polygonal hole 116 is used for limiting the rotation of the screw shaft 107, but the screw shaft 107 can still move in the axial direction relative to the polygonal hole 116, so as to move the moving part.
For example, the polygonal hole 116 is a hexagonal through hole 106, and at least a cross section of the screw shaft 107 at a position passing through the hexagonal through hole 106 is also provided in a hexagonal shape to restrict rotation of the screw shaft 107 but not to restrict axial movement of the screw shaft 107. In fact, the shape of the cross section of the corresponding position of the screw shaft 107 may be the same as or different from the shape of the polygonal hole 116, as long as the polygonal hole 116 can achieve the effect of restricting the rotation of the screw shaft 107 without affecting the axial movement of the screw shaft 107.
In an alternative of this embodiment, the fixing frame 101 further comprises a locking member 117; a ring table 118 is formed on one side of the mounting seat 115 facing the frame body 114, an annular groove 119 is formed on the circumference of the ring table 118, and a plurality of strip-shaped holes 129 corresponding to the annular groove 119 are formed on the frame body 114; the locking member 117 includes a mounting portion 120 and a clamping portion 121, the mounting portion 120 is clamped between the annular groove 119 and the frame body 114, the clamping portions 121 at both ends of the mounting portion 120 penetrate through the end portions of the adjacent strip-shaped holes 129 respectively, and the clamping portions 121 do not protrude from the surface of the frame body 114.
In this embodiment, the mounting seat 115 is formed with a ring platform 118 having an annular groove 119, and the frame body 114 can be engaged with the outside of the ring platform 118 and the mounting portion 120 of the locking member 117 is clamped between the annular groove 119 and the frame body 114. Specifically, the mounting portion 120 may have an arc shape that is capable of fitting the shape of the annular groove 119. Preferably, the frame body 114 may also be provided with a slot at a position corresponding to the mounting portion 120, that is, the slot is provided between adjacent strip-shaped holes 129, and further the mounting portion 120 is fixed at the frame body 114 side, so as to avoid the relative movement between the frame body 114 and the mounting seat 115 in the axial direction; the mounting portion 120 is an interference fit with the annular groove 119 and the frame body 114 to ensure that the mounting portion 120 is clamped. The clamping portions 121 at the two ends of the mounting portion 120 penetrate through the end portions of the adjacent strip-shaped holes 129 to clamp the frame main body 114, so that relative rotation between the frame main body 114 and the mounting base 115 is avoided.
The fixing mode is flexible to install, the fixing installation position is not needed in the circumferential direction, and the circumferential connection position of the frame main body 114 can be conveniently adjusted. Meanwhile, the end face of the clamping portion 121 does not protrude from the surface of the frame body 114, so that the whole fixing structure is more compact, and the influence on other structures is reduced.
In an alternative version of this embodiment, the transmission assembly further includes a connecting member 122; one end of the connecting piece 122 is connected with the screw shaft 107, and the other end of the connecting piece 122 is connected with the moving part; a convex part 123 is formed in the middle of one side of the mounting seat 115 facing the frame body 114, and the convex part 123 is provided with a polygonal hole 116; the side of the protrusion 123 facing the moving part forms a cavity for receiving the connecting member 122.
Further, the connecting member 122 is opened with a connecting hole 124, and the fastener passes through the connecting hole 124 to connect the moving part; the boss 123 has an operation hole 125 formed in the circumferential direction thereof, so that the fastener can enter the cavity from the operation hole 125.
In this embodiment, the connecting member 122 is a hinge part connecting the screw shaft 107 and the moving part. Specifically, one end of the connecting member 122 is provided with a blind hole, which may be a threaded hole, so that the connecting member 122 is threadedly connected with the screw shaft 107. The other end of the connecting member 122 may be formed with a threaded hole (connecting hole 124) perpendicular to the blind hole, and the connecting member 122 may be threadedly coupled to the moving member.
The mounting seat 115 is formed with a protrusion 123, and the connecting member 122 can be hidden in a cavity formed by the protrusion 123, that is, the fixing frame 101 can surround the whole driving and transmission mechanism, which provides an effective mounting base and maintains the normal operation of the adjusting mechanism.
Because the connecting piece 122 is located in the cavity of the protruding portion 123, the connecting piece 122 can be connected with the moving part only when the bolt needs to be placed in the cavity, the operating hole 125 is formed in the circumferential direction of the protruding portion 123, the bolt can enter the cavity from the operating hole 125 located on the side edge to connect the connecting piece 122 with the moving part, the installation and the operation are more convenient, and the weight of the device can be reduced to a certain extent when the operating hole 125 is formed.
In an alternative to this embodiment, the frame body 114 includes a top cover 126, a post 127, and a connecting ring 128; the top cover 126 and the connecting ring 128 are arranged at intervals, the upright column 127 is used for connecting the top cover 126 and the connecting ring 128, the connecting ring 128 is connected with the mounting seat 115, and the top cover 126 is positioned on the side of the through hole type servo motor 102 and is connected with the stator 104 of the through hole type servo motor 102; the top cover 126, the upright 127 and the connecting ring 128 enclose a receiving cavity matched with the circumferential shape of the through-hole servo motor 102.
In this embodiment, as shown in fig. 6, the top cover 126, the upright 127 and the connecting ring 128 surround to form a receiving cavity which is matched with the shape of the through-hole type servo motor 102, so that the space is not excessively occupied, and the volume of the device can be reduced. The top cover 126 can be provided with a plurality of threaded holes for fixing the through hole type servo motor 102; the connection ring 128 can be arranged around the circumference of the ring platform 118 to realize connection with the mounting seat 115; a plurality of stand 127 intervals set up to connect top cap 126 and go-between 128, so that the three constitutes frame construction more stable, and the setting of fretwork can greatly alleviate device weight between a plurality of stand 127, and is convenient for install each part inside the frame main part 114.
In an alternative to this embodiment, the compact pintle injector adjustment mechanism further comprises an angle sensor 103; a gap is formed between the top cover 126 and the through-hole servomotor 102 to mount the angle sensor 103, and the angle sensor 103 is used to detect the rotation angle of the rotor 105 of the through-hole servomotor 102.
In this embodiment, in operation, after the through-hole servo motor 102 is started, the rotor 105 rotates synchronously with the connecting seat 111 and the nut 108, the rotational motion is converted into the axial motion of the screw shaft 107, and the needle valve structure (moving member) of the head of the pintle injector is pulled by the connecting member 122 to adjust the opening of the pintle injector. The angle sensor 103 may be specifically a magnetic grid angle sensor 103, and when the adjusting mechanism works, the magnetic grid angle sensor 103 may collect a rotation signal in real time and output the rotation angle information of the motor.
The adjusting structure of the invention adopts an open-loop control working mode during working, controls the rotation of the motor through the sending of the pulse signal, and realizes the control of the rotation angle of the motor through the rated sending of the pulse signal, thereby realizing the position control of the needle valve in the pintle injector and further realizing the adjustment of the opening of the pintle injector. In combination with the feedback and verification of the magnetic grid angle sensor 103 on the rotation angle of the motor, a high-precision open-loop control scheme can be realized through a high-frequency pulse signal generator. The high-precision motor rotation angle control can realize the position control of a needle valve in the high-precision pintle injector, so that the opening of the pintle injector can be controlled in high precision.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application. Moreover, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments.
Claims (10)
1. A compact pintle injector adjustment mechanism, comprising a fixed frame, a through-hole servo motor and a transmission assembly;
the end part of the fixed frame is connected with the head part of a pintle injector, and the through hole type servo motor and the transmission assembly are arranged in the fixed frame;
the stator of the through hole type servo motor is connected with the fixed frame, the rotor of the through hole type servo motor is connected with the transmission assembly, and the transmission assembly is used for converting the rotary motion output by the through hole type servo motor into linear motion and is connected with a moving part of the pintle injector;
at least part of the transmission assembly is arranged in the through hole of the through hole type servo motor.
2. The compact pintle injector adjustment mechanism of claim 1, wherein the transmission assembly comprises a threaded shaft and a nut;
the nut is sleeved on the screw shaft and connected with the rotor;
one end of the screw shaft extends into the through hole of the through hole type servo motor and can move axially relative to the through hole, the other end of the screw shaft extends out of the fixed frame, and the fixed frame can limit the rotation of the screw shaft;
one end of the screw shaft, which is far away from the through hole type servo motor, is connected with the moving part so as to push and pull the moving part.
3. The compact pintle injector adjustment mechanism of claim 2, wherein the nut comprises a connecting portion and an imbedding portion;
the connecting part is connected with the rotor, and the embedding part can be arranged in the through hole of the through hole type servo motor.
4. The compact pintle injector adjustment mechanism of claim 3, wherein the drive assembly further comprises a coupling seat;
the connecting seat is positioned between the rotor and the nut, a through hole is formed in the middle of the connecting seat, and the inserting part penetrates through the through hole;
one end of the connecting seat is connected with the end face of the rotor, a mounting groove communicated with the through hole is formed in the other end of the connecting seat, and the connecting portion is arranged in the mounting groove.
5. The compact pintle injector adjustment mechanism of claim 2, wherein the fixed frame comprises a connected frame body and mount;
the through hole type servo motor is connected with the frame main body, and the mounting seat is connected with the head of the pintle injector;
the mounting seat is provided with a polygonal hole for allowing the screw shaft to pass through, the cross section of the corresponding position of the screw shaft is polygonal, the screw shaft can move along the axial direction relative to the polygonal hole, and the polygonal hole is used for limiting the rotation of the screw shaft.
6. The compact pintle injector adjustment mechanism of claim 5, wherein the fixed frame further comprises a locking member;
a ring table is formed on one side, facing the frame main body, of the mounting seat surface, an annular groove is formed in the circumferential direction of the ring table, and a plurality of strip-shaped holes corresponding to the annular groove are formed in the frame main body;
the retaining member includes installation department and joint portion, the installation department centre gripping in the ring channel with between the frame main part, be located the installation department both ends joint portion is respectively from adjacent the tip in bar hole runs through, just joint portion do not protrude in frame main part surface.
7. The compact pintle injector adjustment mechanism of claim 5, wherein the transmission assembly further comprises a connector;
one end of the connecting piece is connected with the screw shaft, and the other end of the connecting piece is connected with the moving part;
a raised part is formed in the middle of one side, facing the frame body, of the mounting seat surface, and the raised part is provided with the polygonal hole; one side of the bulge part facing the moving part forms a cavity for accommodating the connecting piece.
8. The compact pintle injector adjustment mechanism of claim 7, wherein the connecting member defines a connecting aperture through which a fastener passes to connect the moving member;
the circumference of the protruding part is provided with an operation hole, so that a fastener can conveniently enter the cavity from the operation hole.
9. The compact pintle injector adjustment mechanism of claim 5, wherein the frame body comprises a top cover, a post, and a connection ring;
the top cover and the connecting ring are arranged at intervals, the stand column is used for connecting the top cover and the connecting ring, the connecting ring is connected with the mounting seat, and the top cover is positioned on the side of the through hole type servo motor and is connected with a stator of the through hole type servo motor;
the top cover, the upright post and the connecting ring are surrounded to form an accommodating cavity matched with the circumferential shape of the through hole type servo motor.
10. The compact pintle injector adjustment mechanism of claim 9, further comprising an angle sensor;
and a gap is formed between the top cover and the through hole type servo motor to install the angle sensor, and the angle sensor is used for detecting the rotation angle of the rotor of the through hole type servo motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110231599.XA CN112879180A (en) | 2021-03-02 | 2021-03-02 | Compact pintle injector adjustment mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110231599.XA CN112879180A (en) | 2021-03-02 | 2021-03-02 | Compact pintle injector adjustment mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112879180A true CN112879180A (en) | 2021-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110231599.XA Pending CN112879180A (en) | 2021-03-02 | 2021-03-02 | Compact pintle injector adjustment mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113756989A (en) * | 2021-09-14 | 2021-12-07 | 中国科学院力学研究所 | Gas/liquid pintle injector with swirl-assisted atomization and adjustable swirl degree |
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| CN110094284A (en) * | 2019-03-26 | 2019-08-06 | 上海海事大学 | A kind of injection apparatus that electric cylinders needle-valve speed is controllable |
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| EP1243783A1 (en) * | 2001-03-08 | 2002-09-25 | TRW Inc. | Pintle injector rocket with expansion-deflection nozzle |
| CN103586321A (en) * | 2013-10-16 | 2014-02-19 | 西安交通大学 | Supercharged electric servo deep-drawing cushion |
| CN105757304A (en) * | 2016-05-09 | 2016-07-13 | 北京航空航天大学 | High-precision flow servo control valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113756989A (en) * | 2021-09-14 | 2021-12-07 | 中国科学院力学研究所 | Gas/liquid pintle injector with swirl-assisted atomization and adjustable swirl degree |
| CN113756989B (en) * | 2021-09-14 | 2022-07-05 | 中国科学院力学研究所 | Gas/liquid pintle injector with swirl-assisted atomization and adjustable swirl degree |
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Application publication date: 20210601 |