CN216248017U - Miniature turbojet engine speed measuring device based on 3D prints - Google Patents
Miniature turbojet engine speed measuring device based on 3D prints Download PDFInfo
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- CN216248017U CN216248017U CN202122783633.2U CN202122783633U CN216248017U CN 216248017 U CN216248017 U CN 216248017U CN 202122783633 U CN202122783633 U CN 202122783633U CN 216248017 U CN216248017 U CN 216248017U
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- 230000005540 biological transmission Effects 0.000 claims abstract description 34
- 238000010146 3D printing Methods 0.000 claims abstract description 17
- 239000000523 sample Substances 0.000 claims description 13
- 210000004907 gland Anatomy 0.000 claims 2
- 238000005259 measurement Methods 0.000 abstract description 27
- 238000009434 installation Methods 0.000 description 9
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005355 Hall effect Effects 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Abstract
The utility model belongs to the technical field of speed measurement of turbojet engines, and particularly discloses a miniature turbojet engine speed measurement device based on 3D printing. The utility model arranges a magnet on a lock nut component for fixing a torque transmission shaft, and a speed measurement sensor component for measuring the rotating speed is arranged on an air inlet channel in a matching way by the magnet; the measurement of the rotating speed is effectively realized; and the function of fixing the torsion transmission shaft and the rotor assembly in the turbojet engine can be effectively realized.
Description
Technical Field
The utility model relates to the technical field of speed measurement of turbine engines, in particular to a speed measurement device of a micro turbojet engine based on 3D printing.
Background
The turbojet engine is used as a new field for the field development of propulsion energy and power systems, has the advantages of high rotating speed, small volume, light weight, large thrust-weight ratio, wide application range and the like, and is widely applied to small unmanned aerial vehicles and model airplanes.
During the operation of the engine, the rotating speed is an important operation parameter, and the size of the rotating speed determines the power propulsion and the operation state of the engine, so that the measuring of the rotating speed has important significance. Conventional methods for measuring the rotation speed generally include electromagnetic pulse type, photoelectric type and hall effect type.
A device for measuring the rotating speed is arranged in a general engine and used for controlling the flight state, a magnetic ring is sleeved on a main shaft, a key type Hall sensor is arranged beside the main shaft and connected with an oscilloscope, the Hall sensor sends a pulse signal when the magnetic ring rotates for one circle through N-S two poles, and the waveform frequency on the oscilloscope is converted into the rotating speed per minute through the frequency. But because the device is placed inside, the environment is complicated, so the signal is unstable, and the rotational speed is too fast, easily appears the error, and the precision is not high.
Because the internal temperature of the engine is higher, the speed measuring device needs to consider the design of high temperature resistance and the like which are suitable for complex environments, the speed measuring structure is complex, most magnetic ring structures need to be customized according to the main shaft and the locking device, the price is high, the period is long, and once the maintenance is needed, the replacement of the whole machine is troublesome.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a miniature turbojet engine speed measuring device based on 3D printing, which is convenient to install and detach and accurate in speed measurement.
The technical problem to be solved by the utility model is as follows:
the utility model provides a miniature turbojet engine speed sensor based on 3D prints, includes the lock nut subassembly of being connected near intake duct one end with turbojet engine biography torsion shaft, installs the magnet in the lock nut subassembly and install on turbojet engine intake duct and with the speed sensor subassembly that the magnet cooperation was used.
According to the utility model, the locking nut assembly is connected with the torque transmission shaft of the turbojet engine, so that the effects of fixing the torque transmission shaft and the rotor assembly in the turbojet engine are effectively realized; a magnet is arranged in the locking nut assembly and is matched with a speed measurement sensor assembly arranged on an air inlet channel, so that the rotation speed of the torque transmission shaft is effectively measured; the magnet and the speed measuring sensor assembly are arranged on the outer side of the turbojet engine shell, so that the structure is simpler, and the turbojet engine shell is convenient to mount, dismount and replace.
In some possible embodiments, in order to effectively achieve the connection with the end of the torque transmission shaft, and to enable the mounting of the magnet;
the locking nut assembly comprises a nut seat in threaded connection with the torque transmission shaft and a nut head connected with one end of the nut seat, which is far away from the torque transmission shaft;
the nut head is provided with a mounting groove for mounting a magnet.
When the mounting groove is intersected with the axial direction of the nut seat, the magnet is effectively limited, and the magnet is prevented from moving in the mounting groove when the torque transmission shaft rotates;
in some possible embodiments, the axis of the mounting groove intersects with the axis of the nut seat and penetrates through the nut head, a limiting groove communicated with the end of the mounting groove is arranged on the nut seat, and a stop block is arranged in the limiting groove;
the limiting groove is arranged along the axial direction of the nut seat.
In some possible embodiments, the mounting groove is a cylindrical structure, and includes a large hole section, a cylindrical section and a small hole section which are coaxial and communicated with each other in sequence.
When the mounting groove is arranged along the axial direction of the nut seat; in order to effectively realize the installation of the magnet and limit the magnet;
in some possible embodiments, the mounting groove is arranged coaxially with the nut seat;
and a nut hole is formed in one side, close to the nut seat, of the nut head, a screw rod matched with the nut hole is arranged on the nut seat, and the mounting groove is communicated with the nut hole.
In some possible embodiments, the mounting groove is arranged along the axial direction of the nut seat, and the nut seat is provided with a through groove communicated with the mounting groove;
the nut seat is provided with at least two mounting grooves which are uniformly arranged along the circumferential direction of the nut seat.
In some possible embodiments, a limiting protrusion for limiting the axial movement of the magnet along the nut seat is arranged in the mounting groove.
In some possible embodiments, to ensure that the cage nut assembly does not loosen or become separated from the torque transmission shaft when the torque transmission shaft is rotated;
the nut seat is provided with an internal thread hole, and the thread turning direction of the internal thread hole is consistent with the rotating direction of the torsion transmission shaft.
In some possible embodiments, in order to enable the speed measuring sensor assembly to measure more accurately;
and a cavity communicated with the side surface of the mounting groove is arranged on the outer side of the nut head.
In some possible embodiments, in order to effectively realize the position relationship between the speed measuring sensor assembly and the locking nut assembly, the measurement is more accurate;
the speed measurement sensor assembly comprises a switching tube arranged on the air inlet channel, a first connecting shaft and a probe, wherein the first connecting shaft is close to one end of the locking nut assembly in a screwed mode with the switching tube, and the probe is arranged at the other end of the first connecting shaft in a connected mode and provided with a Hall sensor.
In some possible embodiments, the adapter tube comprises a limiting head arranged on the air inlet channel and a second connecting shaft connected with the limiting head and extending into the air inlet hole;
the second connecting shaft is provided with an internal threaded hole, and the first connecting shaft is provided with an external thread.
In some possible embodiments, the adapter tube is fixed to the inlet duct for effective implementation;
the speed measuring sensor assembly further comprises a compression nut in threaded connection with the first connecting shaft and a compression ring sleeved on the outer side of the second connecting shaft.
In some possible embodiments, the tachometer sensor assembly comprises a mounting bracket mounted on the air inlet duct, and a card type tachometer sensor mounted on one side of the mounting bracket close to the lock nut assembly and used in cooperation with a magnet.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model arranges a magnet on a lock nut component for fixing a torque transmission shaft, and a speed measurement sensor component for measuring the rotating speed is arranged on an air inlet channel in a matching way by the magnet; the measurement of the rotating speed is effectively realized;
the whole speed measuring device is arranged on the air inlet channel, so that the installation and the disassembly are more convenient; the locking nut assembly only fixes the torque shaft and is matched with the speed measurement sensor assembly to realize the rotation speed measurement function;
the distance between the speed measuring sensor assembly and the locking nut assembly is effectively adjustable through the matching of the adapter tube, the connecting shaft and the probe, so that the measurement is more accurate;
according to the utility model, the thread turning direction of the internal thread hole of the nut seat is consistent with the rotating direction of the torque transmission shaft, so that the locking nut assembly and the torque transmission shaft can be effectively fixed in the measuring process, and looseness or separation cannot occur;
the 3D printing machine is integrally formed, the structure is compact, the internal structure cannot be realized by traditional machining, the manufacturing speed is high, and the efficiency is high;
the utility model has simple structure and strong practicability.
Drawings
FIG. 1 is an isometric view of the present invention;
FIG. 2 is an axial side schematic view of a cage nut assembly having a stop according to the present invention;
FIG. 3 is a schematic cross-sectional view of FIG. 2;
FIG. 4 is a schematic axial side view of a cage nut assembly of the present invention abutting a magnet via a threaded rod;
FIG. 5 is a schematic cross-sectional view of FIG. 4;
FIG. 6 is a schematic view showing the connection relationship between the nut seat and the nut head when the length of the magnet is equal to the lengths of the mounting groove and the through groove;
FIG. 7 is a cross-sectional view of FIG. 6;
FIG. 8 is a schematic view of the lock nut assembly of the present invention with the magnet in the configuration of a thin plate;
FIG. 9 is an elevational view of FIG. 8;
FIG. 10 is a schematic cross-sectional view of FIG. 8;
FIG. 11 is a schematic view of the structure of the probe of the present invention;
FIG. 12 is a schematic view of the clamp ring of the present invention;
FIG. 13 is a schematic structural view of an adapter tube according to the present invention;
FIG. 14 is a schematic structural diagram of the card type tachometer sensor used in the present invention;
wherein: 1. an air inlet channel; 10. a torsion transmission shaft; 11. an air inlet; 2. a lock nut assembly; 21. a nut head; 211. mounting grooves; 212. a limiting bulge; 22. a nut seat; 23. a stopper; 24. a chamber; 25. a magnet; 3. a speed measurement sensor assembly; 31. a transfer tube; 32. a compression ring; 33. a probe.
Detailed Description
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; either directly or indirectly through intervening media, either internally or in any other relationship. Reference herein to "first," "second," and similar words, does not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. In the implementation of the present application, "and/or" describes an association relationship of associated objects, which means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In the description of the embodiments of the present application, the meaning of "a plurality" means two or more unless otherwise specified. For example, the plurality of positioning posts refers to two or more positioning posts. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The present invention will be described in detail below.
In the prior art, the torque transmission of the turbojet engine penetrates through the housing of the turbojet engine to enter the air inlet channel 1 and is arranged coaxially with the air inlet 11 arranged on the air inlet channel 1.
The utility model provides a miniature turbojet engine speed sensor based on 3D prints, includes and passes the lock nut subassembly 2 that torsion shaft 10 is close to 1 one end of intake duct and be connected with the turbojet engine, installs magnet 25 in lock nut subassembly 2 and install on turbojet engine intake duct 1 and with the speed sensor subassembly 3 that magnet 25 cooperation was used.
In the utility model, the locking nut component 2 is connected with the torque transmission shaft 10 of the turbojet engine, so that the fixation of the torque transmission shaft 10 and the action of a rotor component in the turbojet engine are effectively realized; a magnet 25 is arranged in the locking nut component 2 and is matched with a speed measurement sensor component 3 arranged on the air inlet channel 1, so that the measurement of the rotating speed of the torsion transmission shaft 10 is effectively realized; magnet 25 and tacho sensor subassembly 3 all set up in the outside of turbojet engine housing for the structure is simpler, is convenient for ann tear open and change.
In some possible embodiments, in order to effectively achieve the connection with the end of the torque transmission shaft 10 and to enable the mounting of the magnet 25;
the locking nut component 2 comprises a nut seat 22 in threaded connection with the torque transmission shaft 10 and a nut head 21 connected with one end, far away from the torque transmission shaft 10, of the nut seat 22;
the nut head 21 is provided with a mounting groove 211 for mounting the magnet 25.
The nut seat 22 is connected with the torque transmission shaft 10 to realize the fixation of the torque transmission shaft 10 and the action of a rotor assembly in a turbojet engine; the nut head 21 is provided with a mounting groove 211 for mounting the magnet 25, and under the condition that the torque transmission shaft 10 rotates, the nut seat 22 and the nut head 21 synchronously rotate, so that the magnet 25 rotates, and the speed measurement sensor assembly 3 can measure the rotating speed;
when the mounting groove 211 is crossed with the axial direction of the nut seat 22, in order to effectively limit the position of the magnet 25 and avoid the magnet 25 moving in the mounting groove 211 when the torque transmission shaft 10 rotates;
as a preferred embodiment; as shown in fig. 2 and 3; the axis of the mounting groove 211 is intersected with the axis of the nut seat 22 and penetrates through the nut head 21, a limiting groove communicated with the end part of the mounting groove 211 is formed in the nut seat 22, and a stop block 23 is mounted in the limiting groove; the limiting groove is arranged along the axial direction of the nut seat 22.
As shown in fig. 3, the axial direction of the mounting groove 211 is perpendicular to the axial direction of the nut holder 22.
In some possible embodiments, the mounting groove 211 is a cylindrical structure, and includes a large hole section, a cylindrical section and a small hole section which are coaxial and connected in sequence.
The mounting groove 211 of above-mentioned structure makes the magnet 25 of column structure or spherical structure can only pack into from the big pore section of mounting groove 211, installs in the cylinder section, and the aperture section is with its roll-off of effectual restriction, and dog 23 only need set up the one side at the big pore section of mounting groove 211 this moment, can mutually support with the aperture section of mounting groove 211 and realize the restriction to magnet 25 position, avoids it to take place the position in mounting groove 211 at the measurement process.
When the mounting groove 211 is provided in the axial direction of the nut holder 22; in order to effectively realize the installation of the magnet 25 and limit the magnet 25;
as a preferred embodiment, as shown in fig. 4, 5; the mounting groove 211 and the nut seat 22 are coaxially arranged;
one side of the nut head 21 close to the nut seat 22 is provided with a nut hole, the nut seat 22 is provided with a screw matched with the nut hole, and the mounting groove 211 is communicated with the nut hole.
The screw rod realizes the connection of the nut head 21 and the nut seat 22, the magnet 25 is installed in the installation groove 211, the screw rod is close to one end of the installation groove 211, and after the nut head 21 and the nut seat 22 are connected in place, the screw rod is abutted to the magnet 25 installed in the installation groove 211, so that the magnet 25 is prevented from moving in the installation groove 211.
In some possible embodiments, as shown in fig. 6-10, the mounting groove 211 is disposed along the axial direction of the nut seat 22, and the nut seat 22 is provided with a through groove communicating with the mounting groove 211;
the number of the mounting grooves 211 is at least two, and the mounting grooves are uniformly arranged along the circumferential direction of the nut seat 22.
The nut seat 22 is provided with a through groove, and the magnet 25 enters the mounting groove 211 from the through groove to be mounted;
as shown in fig. 6 and 7, the length of the magnet 25 may be the sum of the length of the through groove in the axial direction of the nut holder 22 and the length of the mounting groove 211 in the axial direction of the nut holder 22, so that the position where the bottom of the nut holder 22 contacts the torque transmission shaft 10 will be a limiting surface to limit the movement of the magnet 25, and the through groove, the mounting groove 211 and the magnet 25 are in interference fit.
In some possible embodiments, as shown in fig. 8-10, a limiting protrusion 212 for limiting the axial movement of the magnet 25 along the nut seat 22 is disposed in the mounting groove 211.
The magnet 25 is of a sheet structure, and the penetrating groove has the function of enabling the magnet 25 to effectively enter the mounting groove 211; in order to avoid the magnet 25 moving in the mounting groove 211, two limiting protrusions 212 are arranged in the mounting groove 211, and the magnet 25 is clamped tightly by the matching of the two limiting protrusions 212 and cannot move in the mounting groove 211;
preferably, the position-limiting protrusion 212 has elasticity, and can be elastically deformed.
As shown in fig. 8, the mounting grooves 211 are communicated with the outer side of the nut holder 22 along both sides of the nut holder 22 in the axial direction, and the stopper protrusions 212 are mounted in positions to fix the magnet 25 positioned in the mounting grooves 211 from being displaced.
In some possible embodiments, to ensure that the cage nut assembly 2 does not loosen or become detached from the torque transmission shaft 10 when the torque transmission shaft 10 is rotated;
the nut holder 22 is provided with an internally threaded hole having a thread direction in accordance with the rotation direction of the torque transmission shaft 10.
Adopt above-mentioned setting, the screw thread turning of internal thread hole is unanimous with the biography rotation direction of rotation, and when clockwise turning, the screw thread is dextrorotation, and during anticlockwise rotation, the screw thread is the levogyration, and the internal thread links the threaded connection of rotation axis one end with being tested the speed, can guarantee like this that lock nut when the operation starts, nut seat 22 rotates more tightly, can not become flexible.
In some possible embodiments, in order to make the tacho sensor assembly 3 more accurate in measurement;
the outer side of the nut head 21 is provided with a chamber 24 communicated with the side surface of the mounting groove 211.
Set up cavity 24 in the outside of mounting groove 211 to communicate with mounting groove 211, make magnet 25 part expose like this, tacho sensor subassembly 3 will be can directly measure the part that magnet 25 exposes, avoid causing the inaccurate condition of measured data to appear because this shelters from of magnet 25.
In some possible embodiments, in order to effectively realize the installation of the speed measuring sensor assembly 3 and the position relationship of the locking nut assembly 2, the strength of the signal is changed, and the measurement is more accurate;
the speed measurement sensor assembly 3 comprises a switching tube arranged on the air inlet channel 1, a first connecting shaft and a probe 33, wherein the first connecting shaft is close to one end of the locking nut assembly 2 in a screwed mode, the first connecting shaft is arranged at the other end of the first connecting shaft in a connected mode, and the probe 33 is provided with a Hall sensor.
As shown in fig. 1, the adapter tube extends into the air inlet 11 side of the air inlet 1 from the outer side of the air inlet 1, the first connecting shaft and the adapter tube are screwed on the side close to the air inlet 11, the first connecting shaft and the first connecting shaft can be changed along the axial position of the first connecting shaft, the other end of the first connecting shaft is connected with the probe 33, the probe 33 is close to or far away from the magnet 25, speed measurement is achieved through matching of the probe 33 and the magnet 25, and on the other hand, the strength of signals can be adjusted through the probe 33 being close to or far away from the magnet 25, so that measurement is more accurate.
In some possible embodiments, in order to effectively realize a change in the relative position of the switching tube 31 and the connecting shaft;
as shown in fig. 1, 11-13, the adapter tube includes a limiting head mounted on the air inlet duct 1, and a second connecting shaft connected with the limiting head and extending into the air inlet hole;
the second connecting shaft is provided with an internal threaded hole, and the first connecting shaft is provided with an external thread.
In some possible embodiments, the adapter tube is fixed to the inlet duct 1 for effective implementation;
the speed measuring sensor component 3 further comprises a compression nut in threaded connection with the first connecting shaft and a compression ring 32 which is sleeved on the outer side of the second connecting shaft and is positioned in the air inlet 11.
When the switching tube 31 is installed, the compression nut moves to the side away from the probe 33, so that the compression ring 32 moves to the side of the limiting head, and the switching tube 31 is effectively fixed on the air inlet channel 1 through the clamping of the compression ring 32 and the switching head on the air inlet channel 1.
As a preferred embodiment, as shown in fig. 14, the tachometer sensor assembly 3 includes a mounting bracket mounted on the air intake duct 1, and a card type tachometer sensor mounted on a side of the mounting bracket near the lock nut assembly 2 and cooperating with the magnet 25. Although the relative position relation between the speed measurement sensor assembly 3 and the magnet 25 cannot be adjusted by adopting the arrangement, the installation and the disassembly are more convenient.
The Hall sensor and the card type speed measuring sensor are all existing components, and can be directly purchased in the market and then assembled when being assembled; the improvement point of the utility model is not the improvement of the structures or circuits of the Hall sensor and the card type speed measuring sensor, so the details are not described.
Preferably, the maximum detection frequency of the Hall sensor is 10KHZ, the frequency band 1 corresponds to 1HZ, the maximum detection rotating speed is 10000r/s, the maximum detectable rotating speed in one minute is 600000rpm, the maximum detectable range can be adjusted according to the number and the size of the magnets 25, and the angle measurement is 60-90 degrees;
the utility model is made of titanium alloy or high-temperature alloy material, and meets the requirements of strength and precision of the turbojet engine.
Compared with the prior art, the utility model adopts 3D printing additive manufacturing, can effectively realize light-weight design of the structure through 3D printing, can manufacture parts with complicated internal and external structures, and provides more modes and optimized schemes for later equipment assembly through the combined assembly of all the structures. Adopt 3D to print integrated into one piece simultaneously, compact structure, the traditional machine tooling of inner structure can't accomplish, and the preparation is fast, efficient.
The utility model is not limited to the foregoing embodiments. The utility model extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (12)
1. The utility model provides a miniature turbojet engine speed sensor based on 3D prints, its characterized in that includes and spouts the lock nut subassembly that the torsion shaft is close to intake duct one end and is connected, installs the magnet in the lock nut subassembly and install on the intake duct and the speed sensor subassembly that uses with the magnet cooperation with the turbojet engine.
2. The micro turbojet engine speed measuring device based on 3D printing of claim 1, wherein the locking nut assembly comprises a nut seat screwed with the torque transmission shaft, and a nut head connected with one end of the nut seat far away from the torque transmission shaft;
the nut head is provided with a mounting groove for mounting a magnet.
3. The micro turbojet engine speed measuring device based on 3D printing of claim 2, wherein an axis of the mounting groove intersects with an axis of the nut seat and penetrates through the nut head, a limiting groove communicated with the end of the mounting groove is formed in the nut seat, and a stop block is mounted in the limiting groove;
the limiting groove is arranged along the axial direction of the nut seat.
4. The micro turbojet engine speed sensor based on 3D printing of claim 2 or 3, wherein the mounting groove is of a cylindrical structure and comprises a large hole section, a cylindrical section and a small hole section which are coaxial and communicated with each other in sequence.
5. The micro turbojet engine speed measuring device based on 3D printing of claim 2, wherein the mounting groove is coaxial with the nut seat;
and a nut hole is formed in one side, close to the nut seat, of the nut head, a screw rod matched with the nut hole is arranged on the nut seat, and the mounting groove is communicated with the nut hole.
6. The micro turbojet engine speed measuring device based on 3D printing of claim 2, wherein the mounting groove is arranged along an axial direction of the nut seat, and the nut seat is provided with a through groove communicated with the mounting groove;
the nut seat is provided with at least two mounting grooves which are uniformly arranged along the circumferential direction of the nut seat.
7. The micro turbojet engine speed measuring device based on 3D printing of claim 6, wherein a limiting protrusion for limiting the axial movement of the magnet along the nut seat is arranged in the mounting groove.
8. The micro turbojet engine speed measuring device based on 3D printing of any one of claims 2, 3, 5, 6 and 7, wherein the nut base is provided with an internal threaded hole, and the thread direction of the internal threaded hole is consistent with the rotation direction of the torque transmission shaft.
9. The micro turbojet engine speed measuring device based on 3D printing of claim 1, wherein the speed measuring sensor assembly comprises an adapter tube mounted on the air inlet duct, a first connecting shaft in threaded connection with one end of the adapter tube close to the lock nut assembly, and a probe mounted at the other end of the first connecting shaft and connected with a Hall sensor.
10. The micro turbojet engine speed measuring device based on 3D printing of claim 9, wherein the adapter tube comprises a limiting head mounted on the air inlet channel and a second connecting shaft connected with the limiting head and extending into the air inlet hole;
the second connecting shaft is provided with an internal threaded hole, and the first connecting shaft is provided with an external thread.
11. The micro turbojet engine speed sensor based on 3D printing of claim 10, wherein the speed sensor assembly further comprises a gland nut screwed with the first connecting shaft and a gland ring sleeved on the outer side of the second connecting shaft.
12. The micro turbojet engine speed measuring device based on 3D printing of claim 1, wherein the speed measuring sensor assembly comprises a mounting frame mounted on the air inlet channel, and a card type speed measuring sensor mounted on one side of the mounting frame close to the locking nut assembly and used with the magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122783633.2U CN216248017U (en) | 2021-11-11 | 2021-11-11 | Miniature turbojet engine speed measuring device based on 3D prints |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122783633.2U CN216248017U (en) | 2021-11-11 | 2021-11-11 | Miniature turbojet engine speed measuring device based on 3D prints |
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| CN216248017U true CN216248017U (en) | 2022-04-08 |
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| CN202122783633.2U Expired - Fee Related CN216248017U (en) | 2021-11-11 | 2021-11-11 | Miniature turbojet engine speed measuring device based on 3D prints |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113960324A (en) * | 2021-11-11 | 2022-01-21 | 浙江意动科技股份有限公司 | A 3D printing-based micro-turbojet engine speed measurement device |
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2021
- 2021-11-11 CN CN202122783633.2U patent/CN216248017U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113960324A (en) * | 2021-11-11 | 2022-01-21 | 浙江意动科技股份有限公司 | A 3D printing-based micro-turbojet engine speed measurement device |
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