Cylinder body measuring mechanism and method for aviation rotor engine of unmanned aerial vehicle

Abstract

The invention discloses a cylinder body measuring mechanism and method for an unmanned aerial vehicle aviation rotor engine, and belongs to the field of unmanned aerial vehicle aviation rotor engines. Comprising a measuring base, a moving platform installed on the measuring base through a sliding block assembly, and a locking assembly for positioning the measuring base. The measuring base can be installed on a cylinder body to be measured in an attached mode and serves as a carrying platform of the measuring mechanism. The sliding block assembly can drive the moving platform to do arc motion along a guide rail of the measuring base, and a first measuring ruler for measuring the circumferential position of a cylinder to be measured is installed on the sliding block assembly. And the mobile platform is provided with a measuring scale for measuring the axial position and the radial position of the cylinder body to be measured and a digital display dial indicator for multi-dimensional dynamic calibration. Detection of engine molded lines, air inlet and outlet positions and initial mounting positions of radial sealing strips can be realized, and engine precision control and assembly quality stability can be improved.

Description

Technical Field

[0001] The present invention belongs to the field of unmanned aerial vehicle (UAV) aviation rotary engines, and particularly relates to a cylinder block measuring mechanism and method for a UAV aviation rotary engine. Background Art

[0002] High-speed UAVs mostly use rotary engines as direct power, and the reliable operation of the engine directly affects the flight safety of the aircraft. For a rotary engine, the cylinder block profile is an important parameter to ensure the sealing of the combustion chamber and the normal operation of the engine. The machining and assembly of actual cylinder block parts cannot achieve absolute zero error, and the resulting cylinder block deformation will cause changes in the actual profile of the cylinder block, resulting in the radial sealing strip in the rotor sealing groove moving along the normal direction of the cylinder block profile, affecting the normal use of the engine and even leading to engine scrapping.

[0003] According to the working principle of the rotary engine, the intake and exhaust of the engine are controlled by the rotation of the rotor passing through the intake and exhaust ports. Therefore, if the position errors of the intake and exhaust ports are large, it may cause changes in the intake and exhaust phases, resulting in the premature discharge of combustion gases and affecting the actual power of the engine.

[0004] The vertices of the rotor of the rotary engine are theoretically completely symmetric. Therefore, after it is installed on the cylinder block, the initial positions of the sealing rotor and the radial sealing strip of the cylinder block are also fixed. However, due to reasons such as rotor manufacturing errors, the distance between the rotor vertices may not conform to the design, resulting in the offset of the position of the radial sealing strip and affecting the normal operation of the engine.

[0005] When the engine has problems with unqualified power, the cylinder block profile of the engine, the positions of the engine intake and exhaust ports, etc. are the key dimensions to be verified.

[0006] The cylinder block profile and the engine intake and exhaust phases can be measured by a coordinate measuring machine, but this measurement method has the following disadvantages:

[0007] 1. Inconvenient operation: For an engine that has been assembled, the cylinder block needs to be removed from the engine and taken to the coordinate measuring machine for measurement, and it cannot be directly measured on the component, so it is impossible to control the quality during the assembly process;

[0008] 2. Expensive measurement cost and long measurement cycle. Summary of the Invention

[0009] Technical Problems to be Solved:

[0010] To avoid the deficiencies of the prior art, the present invention provides a cylinder block measuring mechanism for an unmanned aerial rotor engine, which transforms complex contour measurement into a modular and portable solution, breaking through the dependence of traditional measurement techniques on high-cost equipment and professional environments. Through integrated design (such as track matching, self-locking positioning, digital display automation), it realizes the leap from "laboratory-level" to "field-level" measurement. It can detect the engine profile, the positions of the intake and exhaust ports, and the initial installation position of the radial sealing strip, facilitating the improvement of the stability of engine precision control and assembly quality.

[0011] The technical solution of the present invention is: a cylinder block measuring mechanism for an unmanned aerial rotor engine, comprising a measuring base, a moving platform installed on the measuring base through a slider assembly, and a locking assembly for positioning the measuring base.

[0012] The measuring base can be fitted and installed on the cylinder block to be measured, serving as a carrier platform for the measuring mechanism.

[0013] The slider assembly can drive the moving platform to move in an arc along the guide rail of the measuring base, and a first measuring scale for measuring the circumferential position of the cylinder block to be measured is installed thereon.

[0014] Measuring scales for measuring the axial and radial positions of the cylinder block to be measured and a digital display micrometer for multi-dimensional dynamic calibration are arranged on the moving platform.

[0015] A further technical solution of the present invention is: the body of the measuring base is of a ring structure, and a ring-shaped guide rail is provided on its ring-shaped upper end surface. The profile of the guide rail is obtained by proportionally enlarging the profile of the cylinder block to be measured; handrails are provided on opposite sides of the body for easy picking up, placing, and installation.

[0016] A further technical solution of the present invention is: a plurality of mounting seats are arranged on the inner ring surface of the measuring base for installing a self-locking positioning pin assembly to complete the fitting installation and locking fixation of the measuring base and the cylinder block to be measured; through holes coaxial with the positioning holes on the top surface of the cylinder block to be measured are opened on the mounting seats.

[0017] A further technical solution of the present invention is: the self-locking positioning pin assembly includes a pin shaft seat and a pin shaft coaxially installed thereon. The pin shaft seat is of a sleeve structure, its bottom is installed on the mounting seat, and four card slots are evenly distributed along the circumferential direction on the top ring surface thereof. Two of them are opposite and semi-circular in cross-section as the first card slots, and the other two are opposite and semi-circular with a rectangular cross-section as the second card slots, that is, the axial depth of the second card slot is greater than that of the first card slot; a knob is installed on the top of the pin shaft, and two buckles are symmetrically arranged on its outer circumference.

[0018] When two buckles are placed in the first card slot, the axial position of the bottom of the pin shaft rises and disengages from the positioning hole of the cylinder block to be measured; by screwing the knob, the positions of the two buckles are adjusted to face the second card slot, and the buckles are pressed to the bottom of the second card slot, the axial position of the bottom of the pin shaft drops, and it is inserted into the positioning hole of the cylinder block to be measured, realizing the locking of the measurement base and the cylinder block to be measured.

[0019] A further technical solution of the present invention is that the vertical height of the moving platform is adjustable, and the radial position of the digital display micrometer installed on the moving platform is adjustable. By adjusting the circumferential position of the slider assembly, the height position of the moving platform, and the radial position of the digital display micrometer, the probe position of the digital display micrometer is further adjusted for calibration and measurement.

[0020] A further technical solution of the present invention is that the moving platform is of a cuboid structure, a second measuring scale for measuring the axial position of the cylinder block to be measured is installed on its side wall, and a boss is provided on its inner side wall surface, and a third measuring scale for measuring the radial position of the cylinder block to be measured is installed on the top surface of the boss;

[0021] One threaded through hole and one blind hole parallel to each other are opened in the moving platform in the vertical direction. The threaded through hole is used to install a screw rod, and a first knob is provided at the top end of the screw rod. A guide rod is inserted into the blind hole; the bottom end of the screw rod passes through the moving platform and is rotatably connected to the slider assembly, the bottom of the guide rod is fixed on the slider assembly, and the top is in clearance fit with the blind hole; the height position of the moving platform is adjusted by screwing the first knob;

[0022] A through hole combined with a threaded hole and a square light hole is opened in the moving platform in the horizontal direction. One end of a telescopic rod with a square cross-section is inserted into the square light hole, and a digital display micrometer is installed at the other end; a screw rod with a second knob is screwed into the threaded hole, and the end is rotatably connected to one end of the telescopic rod. By screwing the second knob, the radial position of the digital display micrometer is adjusted.

[0023] A further technical solution of the present invention is that the slider assembly includes a sliding seat and four rollers installed at its bottom. Every two rollers perpendicular to the movement direction are in a group and are clamped on both sides of the guide rail, and can rotate along the annular guide rail to ensure smooth operation.

[0024] A method for measuring the cylinder block profile of a cylinder block measuring mechanism for an unmanned aerial vehicle aero rotor engine is as follows:

[0025] Place the cylinder block to be measured on a plane, place the measurement base on the cylinder block to be measured, and lock and fix it through the self-locking positioning pin assembly;

[0026] Push the slider assembly to slide along the guide rail of the measurement base, align the calibration line on the slider assembly with the calibration line on the measurement base, and calibrate the first measuring scale;

[0027] Adjust the moving platform to complete the adjustment of the axial and radial positions of the digital micrometer, so that the probe of the digital micrometer contacts the top surface of the cylinder block to be measured, and calibrate the second measuring scale;

[0028] Continue to adjust the axial and radial positions of the digital micrometer so that the height of its probe reaches the height of the cylinder block to be measured, and at the same time the probe contacts the inner wall of the cylinder block, and calibrate the third measuring scale and the digital micrometer;

[0029] Push the slider assembly. When reaching the point to be measured, obtain the data of the point to be measured through the digital micrometer.

[0030] A method for measuring the intake and exhaust phases of a cylinder block measuring mechanism for an unmanned aerial vehicle (UAV) aviation rotary engine is as follows:

[0031] Place the cylinder block to be measured on a plane, place the measuring base on the cylinder block to be measured, and lock and fix it through the self-locking positioning pin assembly;

[0032] Push the slider assembly to slide along the guide rail of the measuring base, align the calibration line on the slider assembly with the calibration line on the measuring base, and calibrate the first measuring scale;

[0033] Adjust the moving platform to complete the adjustment of the axial and radial positions of the digital micrometer, so that the probe of the digital micrometer contacts the top surface of the cylinder block to be measured, and calibrate the second measuring scale;

[0034] Continue to adjust the axial and radial positions of the digital micrometer so that the height of its probe reaches the height of the cylinder block to be measured, and at the same time the probe contacts the inner wall of the cylinder block, and calibrate the third measuring scale and the digital micrometer;

[0035] Push the slider assembly to reach the critical position of the intake port or exhaust port, and adjust the digital micrometer so that its probe contacts the inside of the cylinder block. At this time, the value of the digital micrometer will change significantly. Through the data jump point, obtain the intake and exhaust phases from the first measuring scale.

[0036] A method for measuring the position of special points of a cylinder block measuring mechanism for an unmanned aerial vehicle (UAV) aviation rotary engine is as follows:

[0037] Place the cylinder block to be measured on a plane, place the measuring base on the cylinder block to be measured, and lock and fix it through the self-locking positioning pin assembly;

[0038] Push the slider assembly to slide along the guide rail of the measuring base, align the calibration line on the slider assembly with the calibration line on the measuring base, and calibrate the first measuring scale;

[0039] Adjust the moving platform to complete the adjustment of the axial and radial positions of the digital micrometer, so that the height of the probe of the digital micrometer is between the top of the cylinder block and the top of the radial sealing strip;

[0040] Push the slider assembly to near the radial sealing strip, and at the same time adjust the axial and radial positions of the digital display micrometer. When the probe contacts the radial sealing strip, the value of the digital display micrometer jumps at this time. Record the value of the first measuring scale to obtain the actual position of the radial sealing strip.

[0041] Advantages

[0042] The advantages of the present invention are as follows: The technical solution of the present invention transforms traditional laboratory-level measurement into an on-site high-efficiency solution through integrated design (track matching, self-locking positioning, digital display automation) and modular structure, with high precision, low cost, portability and versatility. It is especially suitable for the rapid repair and daily maintenance of UAV rotor engines, significantly improving the stability of assembly quality. The specific effect analysis is as follows:

[0043] 1. In-situ measurement and operation convenience. By proportionally enlarging the track and self-locking positioning pin assembly of the present invention, measurement can be directly carried out on the assembled cylinder block, avoiding the cumbersome process of disassembling the cylinder block required by traditional coordinate measuring machines, and significantly improving the operation efficiency. Through the dual-knob adjustment design (height and probe retraction) of the moving platform combined with the real-time display function of the digital display micrometer, a single person can complete calibration, measurement and data recording, reducing the dependence on professional personnel.

[0044] 2. High precision and multi-function integration. The track of the measurement base of the present invention is strictly enlarged in proportion according to the cylinder block profile, ensuring that the movement trajectory of the slider assembly along the track is consistent with the actual contour of the cylinder block, and the profile error can be controlled at the micron level. One device can be used to measure the cylinder block profile, intake and exhaust phases and the initial position of the radial sealing strip at the same time, covering the key quality verification requirements of the engine and reducing the equipment switching time.

[0045] 3. Cost-effectiveness and portability. Compared with coordinate measuring machines, the structure of this device is simple and the manufacturing cost is low, which is suitable for use in small and medium-sized repair workshops or battlefield environments. The measurement base is equipped with a handrail, and the overall device is small and portable, supporting rapid deployment in the wild or in the hangar, and adapting to the diverse maintenance scenarios of UAV engines.

[0046] 4. Anti-interference and stability. The present invention drives the pin shaft to insert into the positioning hole and mechanically engage through a knob, effectively preventing the mechanism from shifting due to vibration or external force during the measurement process, ensuring the stability of data acquisition. By adopting a roller structure at the bottom of the slider assembly and combining with the elastic adjustment function of the moving platform, smooth sliding can be achieved in the sharp corner or complex profile area, avoiding data jump errors.

[0047] 5. Data automation and fault diagnosis. The present invention supports real-time display of data through a digital display micrometer and transmits it to a computer through an interface to generate a standardized inspection report, reducing manual recording errors. By measuring data anomalies (such as profile jumps and phase offsets), the root cause of insufficient engine power or seal failure can be quickly locked, shortening the fault troubleshooting cycle.

[0048] 6. Process compatibility and scalability. By replacing the orbit module with an equi-proportionally enlarged one, the detection of rotor engine cylinders with different sizes or profiles can be extended, improving the versatility of the device. It supports real-time measurement during the engine assembly process, early detection of cylinder deformation or seal strip offset problems, and reducing the rework rate. Description of the Drawings

[0049] Figure 1 is a schematic structural diagram of the measuring mechanism of the present invention;

[0050] Figure 2 is a schematic calibration diagram of the measuring mechanism of the present invention;

[0051] Figure 3 is a schematic diagram of the measuring mechanism of the present invention for measuring the cylinder profile and the intake and exhaust phases;

[0052] Figure 4 is a schematic diagram of the measuring mechanism of the present invention for measuring special points;

[0053] Figure 5 is a schematic structural diagram of the self-locking positioning pin assembly of the measuring mechanism of the present invention; (a) the self-locking positioning pin assembly in the locked state, (b) the self-locking positioning pin assembly in the unlocked state;

[0054] Description of the reference numerals: 1 - measuring base, 11 - guide rail, 12 - mounting seat for the self-locking positioning pin assembly, 2 - slider assembly, 3 - first measuring scale, 4 - second measuring scale, 5 - moving platform, 51 - first knob, 52 - second knob, 6 - third measuring scale, 7 - digital display micrometer, 71 - probe, 8 - first self-locking positioning pin assembly, 9 - second self-locking positioning pin assembly, 91 - pin shaft seat, 911 - card slot, 92 - pin shaft, 93 - knob, 94 - buckle. Detailed Description of the Invention

[0055] The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0056] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0057] Based on the problems generated when measuring using a coordinate measuring instrument based on the traditional cylinder profile and the engine intake and exhaust phases, the present invention provides a cylinder measuring mechanism for an unmanned aerial rotor engine, including a measuring base, a moving platform installed on the measuring base through a slider assembly, and a locking assembly for positioning the measuring base; the measuring base can be fitted and installed on the cylinder to be measured as a mounting platform for the measuring mechanism; the slider assembly can drive the moving platform to move in an arc along the guide rail of the measuring base, and a first measuring scale for measuring the circumferential position of the cylinder to be measured is installed thereon; measuring scales for measuring the axial position and radial position of the cylinder to be measured and a digital display micrometer for multi-dimensional dynamic calibration are arranged on the moving platform.

[0058] The above technical solutions will be further described below with reference to the drawings:

[0059] In one embodiment, referring to Figure 1 As shown, a cylinder measuring mechanism for an aero-rotor engine in this example includes a measuring base 1, a slider assembly 2, a first measuring scale 3, a second measuring scale 4, a moving platform 5, a third measuring scale 6, a digital display micrometer 7, and two self-locking positioning pin assemblies 8, 9.

[0060] In one embodiment, the body of the measuring base 1 is of a ring structure, and a ring guide rail is provided on the upper ring surface thereof. The contour of the guide rail is obtained by proportionally enlarging the profile of the cylinder to be measured; handrails are provided on opposite sides of the body for easy picking up, placing, and installation.

[0061] Specifically, a plurality of mounting seats are provided on the inner ring surface of the measuring base for installing the self-locking positioning pin assemblies to complete the fitting installation and locking fixation of the measuring base and the cylinder to be measured; through holes coaxial with the positioning holes on the top surface of the cylinder to be measured are provided on the mounting seats.

[0062] In one embodiment, referring to Figure 5As shown, the self-locking positioning pin assemblies 8 and 9 include a pin shaft seat and a pin shaft 92 coaxially installed thereon. The pin shaft seat 91 is of a sleeve structure, with its bottom installed on the mounting seat. Four card slots 911 are evenly distributed along the circumferential direction on the top annular surface thereof. Two of them that are opposite to each other and have a semi-circular cross-section serve as the first card slots, and the other two that are opposite to each other and have a cross-section of a rectangle plus a semi-circle serve as the second card slots, that is, the axial depth of the second card slot is greater than that of the first card slot. A knob 93 is installed at the top of the pin shaft, and two buckles 94 (the buckles are cylinders) are symmetrically arranged on its outer circumference. When the two buckles 94 are placed in the first card slots, the axial position of the bottom of the pin shaft 92 rises and disengages from the positioning hole of the cylinder to be measured. By screwing the knob 93, the positions of the two buckles 94 are adjusted to be opposite to the second card slots, and the buckles 94 are pressed to the bottom of the second card slots, and the axial position of the bottom of the pin shaft 92 drops and is inserted into the positioning hole of the cylinder to be measured, realizing the locking of the measuring base 1 and the cylinder to be measured to ensure the effectiveness of the measured dimensions.

[0063] In one embodiment, the vertical height of the moving platform 5 is adjustable, and the radial position of the digital display micrometer 7 installed on the moving platform 5 is adjustable. By adjusting the circumferential position of the slider assembly 2, the height position of the moving platform, and the radial position of the digital display micrometer 7, the position of the probe 71 of the digital display micrometer 7 is further adjusted for calibration and measurement.

[0064] Specifically, the moving platform 5 is the installation platform for the measuring scale and the digital display micrometer 7, and is of a cuboid structure. A second measuring scale 4 for measuring the axial position of the cylinder to be measured is installed on its side wall, and a boss is provided on its inner side wall surface. A third measuring scale 6 for measuring the radial position of the cylinder to be measured is installed on the top surface of the boss.

[0065] One threaded through hole and one blind hole that are parallel to each other are opened in the moving platform 5 in the vertical direction. The threaded through hole is used to install a screw rod, and a first knob 51 is provided at the top end of the screw rod. A guide rod is inserted into the blind hole. The bottom end of the screw rod passes through the moving platform and is rotationally connected to the slider assembly. The bottom of the guide rod is fixed on the slider assembly, and the top is in clearance fit with the blind hole. The height position of the moving platform is adjusted by screwing the first knob.

[0066] A through hole combining a threaded hole and a light hole is opened in the moving platform 5 in the horizontal direction. One end of a telescopic rod with a square cross-section is inserted into the square light hole, and the digital display micrometer 7 is installed at the other end. A screw rod with a second knob 52 is screwed into the threaded hole, and the end is connected to one end of the telescopic rod. By screwing the second knob 52, the radial position of the digital display micrometer 7 is adjusted, which is convenient for measuring the profile lines at different positions and different depths of the cylinder.

[0067] Preferably, the digital display micrometer 7 is a lever-type micrometer, which can use digital display technology to read the linear displacement sensed by the probe 71, and can perform absolute measurement, relative measurement, tolerance zone limit value detection, etc. It can preset any position as the starting position, and can also display the maximum value, minimum value and the difference between the maximum and minimum values during the runout measurement. It can be directly read through the dial, or the measurement data can be transmitted to the computer to achieve the automatic acquisition function. The head of the probe 71 is spherical or conical, which supports presetting the starting position, tolerance zone limit detection and automatic data transmission to the computer.

[0068] In one embodiment, the slider assembly 2 includes a slide base and four rollers installed at its bottom. Every two rollers perpendicular to the movement direction form a group and are clamped on both sides of the guide rail, and can rotate along the annular guide rail to ensure smooth operation. The slider assembly 2 ensures that the measuring mechanism can move smoothly along the track, facilitating the measurement of any position of the cylinder block profile. A calibration line is designed on the slider for easy calibration of the slider position.

[0069] Preferably, the three measuring rulers have a calibration function, can measure the relative displacement in the required direction, can be directly read through the dials of the measuring rulers, or the measurement data can be transmitted to the computer to achieve the automatic acquisition function.

[0070] Preferably, the measuring ruler is a digital display vernier caliper.

[0071] In one embodiment, a method for measuring the cylinder block profile of a cylinder block measuring mechanism for an unmanned aerial rotor engine is as follows:

[0072] Step 1: Place the cylinder block to be measured on a plane, place the measuring mechanism 1 on the cylinder block to be measured (see Figure 3 ), rotate the top knobs of the self-locking positioning pin assemblies 8 and 9, and insert the pin shaft 92 into the cylinder block positioning hole;

[0073] Step 2: Push the slider assembly 2 to align the calibration line on the slider assembly 2 with the calibration line on the measuring base (see Figure 2 ), and calibrate the first measuring ruler 3;

[0074] Step 3: Rotate the first knob and the second knob on the movable platform 5 (see Figure 3 ), so that the probe 71 of the digital display micrometer contacts the top surface of the cylinder block to be measured, and calibrate the second measuring ruler 4;

[0075] Step 4: Rotate the first knob 51 and the second knob 52 on the movable platform 5 (see Figure 3 ), so that the height of the probe 71 of the digital display micrometer reaches the height of the cylinder block planned to be measured, and at the same time the probe 71 contacts the inner wall of the cylinder block, and calibrate the third measuring ruler 6 and the digital display micrometer 7;

[0076] Step 5: Push the slider assembly 2. When it reaches a new measurement point, measure the data at the new position with the digital display micrometer 7.

[0077] In one embodiment, a method for measuring the intake and exhaust phases by a cylinder block measuring mechanism for an unmanned aerial vehicle aviation rotary engine is as follows:

[0078] Step 1: Place the cylinder block to be measured on a plane, and place the measuring mechanism 1 on the cylinder block to be measured (see Figure 3 ). Rotate the top knobs of the self-locking positioning pin assemblies 8 and 9 so that the buckle 94 on the pin shaft 92 is stuck in the slot 911. Press the knob 93 to insert the pin shaft 92 into the cylinder block positioning hole.

[0079] Step 2: Push the slider assembly 2 to align the calibration line on the slider assembly 2 with the calibration line on the measuring base (see Figure 2 ), and calibrate the first measuring scale 3.

[0080] Step 3: Rotate the first knob 51 and the second knob 52 on the adjustable moving platform 5 (see Figure 3 ) to make the probe 71 of the digital display micrometer contact the top surface of the cylinder block to be measured, and calibrate the second measuring scale 4.

[0081] Step 4: Rotate the first knob 51 and the second knob 52 on the adjustable moving platform 5 (see Figure 3 ) to make the height of the probe 71 of the digital display micrometer reach the planned measurement height of the cylinder block, and at the same time make the probe 71 contact the inner wall of the cylinder block, and calibrate the third measuring scale 6 and the digital display micrometer 7.

[0082] Step 5: When pushing the slider assembly 2 near the intake port or the exhaust port, rotate the adjustment knob 2 to make the probe contact the inside of the cylinder block. After rough adjustment, continue with fine adjustment. Slowly push the slider assembly 2. When reaching the critical position of the intake and exhaust ports, the value of the digital display micrometer 7 will change significantly. Obtain the intake and exhaust phases through the data of the first measuring scale 3 at the data jump point.

[0083] In one embodiment, a method for measuring the position of special points by a cylinder block measuring mechanism for an unmanned aerial vehicle aviation rotary engine is as follows:

[0084] Step 1: Place the cylinder block assembly to be measured on a plane, rotate the rotor to the initial position, and place the measuring mechanism on the component to be measured (see Figure 4 ). Rotate the top knobs of the self-locking positioning pin assemblies 8 and 9 so that the buckle 94 on the pin shaft 92 is stuck in the slot 911. Press the knob 93 to insert the pin shaft 92 into the cylinder block positioning hole.

[0085] Step 2: Push the slider assembly 2 to align the calibration line on the slider assembly 2 with the calibration line on the measuring base (see Figure 4 ), and calibrate the first measuring scale 3.

[0086] Step 3: Rotate and adjust the first knob 51 and the second knob 52 on the moving platform 5 so that the height of the probe 71 is between the top of the cylinder block and the top of the radial sealing strip;

[0087] Step 4: Push the slider assembly 2 to near the radial sealing strip (see Figure 4 ), slowly push the slider assembly, and at the same time rotate and adjust the first knob 51 and the second knob 52 on the moving platform 5. When the probe 71 contacts the radial sealing strip, the value of the digital display micrometer 7 jumps. Record the value of the first measuring scale 3 at this point to obtain the actual position of the radial sealing strip.

[0088] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention without departing from the principles and purposes of the present invention.

Claims

1. A cylinder measuring mechanism for a UAV aviation rotor engine, characterized in that: It includes a measuring base, a moving platform mounted on the measuring base through a slider assembly, and a locking assembly for positioning the measuring base; The measuring base can be fitted on the cylinder to be measured, serving as a carrying platform for the measuring mechanism; The slider assembly can drive the mobile platform to move in an arc along the guide rail of the measuring base, and a first measuring ruler for measuring the circumferential position of the cylinder to be measured is installed on the mobile platform; The mobile platform is provided with a measuring ruler for measuring the axial position and radial position of the cylinder body to be measured and a digital display micrometer for performing multi-dimensional dynamic calibration.

2. A cylinder measuring mechanism for a UAV aviation rotor engine according to claim 1, characterized in that: The body of the measuring base is an annular structure, and an annular guide rail is arranged on its annular upper end surface. The outline of the guide rail is obtained by proportionally enlarging the profile of the cylinder body to be measured; handrails are arranged on opposite sides of the body to facilitate placement and installation.

3. A cylinder measuring mechanism for a UAV aviation rotor engine according to claim 2, characterized in that: The inner ring surface of the measuring base is provided with a plurality of mounting seats for installing a self-locking positioning pin assembly to complete the fitting installation and locking fixation of the measuring base and the cylinder body to be measured; the mounting seat is provided with a through hole coaxial with the positioning hole on the top surface of the cylinder body to be measured.

4. A cylinder measuring mechanism for a UAV aviation rotor engine according to claim 3, characterized in that: The self-locking positioning pin assembly comprises a pin shaft seat and a pin shaft coaxially mounted thereon, the pin shaft seat is a sleeve structure, the bottom of which is mounted on the mounting seat, and four slots are evenly distributed in the circumferential direction on the upper annular surface of the top thereof, two of which are opposite to each other and have a semicircular cross section as the first slots, and the other two are opposite to each other and have a rectangular plus semicircular cross section as the second slots, that is, the axial depth of the second slot is greater than that of the first slot; a knob is mounted on the top of the pin shaft, and two buckles are symmetrically arranged on its outer circumference; When the two clips are placed in the first slot, the axial position of the bottom of the pin shaft rises and disengages from the positioning hole of the cylinder body to be measured; by turning the knob, the positions of the two clips are adjusted to be opposite to the second slot, and the clips are pressed to the bottom of the second slot, the axial position of the bottom of the pin shaft drops and is inserted into the positioning hole of the cylinder body to be measured, thereby achieving the locking of the measuring base and the cylinder body to be measured.

5. A cylinder measuring mechanism for a UAV aviation rotor engine according to claim 4, characterized in that: The vertical height of the mobile platform is adjustable, and the radial position of the digital micrometer installed on the mobile platform is adjustable. By adjusting the circumferential position of the slider assembly, the height position of the mobile platform, and the radial position of the digital micrometer, the probe position of the digital micrometer is further adjusted for calibration and measurement.

6. A cylinder measuring mechanism for a UAV aviation rotor engine according to claim 5, characterized in that: The mobile platform is a rectangular parallelepiped structure, a second measuring ruler for measuring the axial position of the cylinder to be measured is installed on its side wall, a boss is arranged on its inner wall surface, and a third measuring ruler for measuring the radial position of the cylinder to be measured is installed on the top surface of the boss; The movable platform is provided with a threaded through hole and a blind hole parallel to each other in the vertical direction, wherein the threaded through hole is used to install a screw rod, a first knob is provided at the top of the screw rod, and a guide rod is inserted in the blind hole; the bottom end of the screw rod passes through the movable platform and is rotatably connected to the slider assembly, the bottom of the guide rod is fixed on the slider assembly, and the top of the guide rod is in clearance with the blind hole; the height position of the movable platform is adjusted by turning the first knob; A through hole combining a threaded hole and a square light hole is opened in the horizontal direction on the upper edge of the movable platform; one end of a telescopic rod with a square cross-section is inserted into the square light hole, and a digital dial indicator is installed at the end of the other end; a screw with a second knob is screwed into the threaded hole, and the end is rotatably connected to one end of the telescopic rod. The radial position of the digital dial indicator is adjusted by screwing the second knob.

7. A cylinder measuring mechanism for a UAV aviation rotor engine according to claim 6, characterized in that: The slider assembly includes a slide seat and four rollers installed at the bottom thereof. Every two rollers perpendicular to the movement direction form a group and are clamped on both sides of the guide rail. They can rotate along the annular guide rail to ensure smooth operation.

8. A method for measuring cylinder profile of a cylinder measuring mechanism for a UAV aviation rotor engine according to any one of claims 1 to 7, characterized in that The specific steps are as follows: Place the cylinder to be tested on a flat surface, place the measuring base on the cylinder to be tested, and lock and fix it with the self-locking positioning pin assembly; Push the slider assembly to slide along the guide rail of the measuring base, align the calibration line on the slider assembly with the calibration line on the measuring base, and calibrate the first measuring ruler; The axial position and radial position of the digital dial gauge are adjusted by adjusting the moving platform, so that the probe of the digital dial gauge contacts the top surface of the cylinder to be measured, and the second measuring ruler is calibrated; Continue to adjust the axial and radial positions of the digital dial indicator so that the probe height reaches the planned cylinder height and the probe contacts the inner wall of the cylinder, and calibrate the third measuring ruler and the digital dial indicator; Push the slider assembly to reach the point to be measured, and obtain the data of the point to be measured through the digital micrometer.

9. A method for measuring intake and exhaust phases of a cylinder measuring mechanism for a UAV aviation rotor engine according to any one of claims 1 to 7, characterized in that The specific steps are as follows: Place the cylinder to be tested on a flat surface, place the measuring base on the cylinder to be tested, and lock and fix it with the self-locking positioning pin assembly; Push the slider assembly to slide along the guide rail of the measuring base, align the calibration line on the slider assembly with the calibration line on the measuring base, and calibrate the first measuring ruler; The axial position and radial position of the digital dial gauge are adjusted by adjusting the moving platform, so that the probe of the digital dial gauge contacts the top surface of the cylinder to be measured, and the second measuring ruler is calibrated; Continue to adjust the axial and radial positions of the digital dial indicator so that the probe height reaches the planned cylinder height and the probe contacts the inner wall of the cylinder, and calibrate the third measuring ruler and the digital dial indicator; Push the slider assembly to the critical position of the air inlet or exhaust port, and adjust the digital micrometer so that its probe contacts the inside of the cylinder. At this time, the value of the digital micrometer will change significantly, and the intake and exhaust phases can be obtained by the first measuring ruler through the data jump point.

10. A method for measuring the position of a special point of a cylinder measuring mechanism of a UAV aviation rotor engine according to any one of claims 1 to 7, characterized in that The specific steps are as follows: Place the cylinder to be tested on a flat surface, place the measuring base on the cylinder to be tested, and lock and fix it with the self-locking positioning pin assembly; Push the slider assembly to slide along the guide rail of the measuring base, align the calibration line on the slider assembly with the calibration line on the measuring base, and calibrate the first measuring ruler; The axial position and radial position of the digital dial gauge are adjusted by adjusting the moving platform so that the height of the probe of the digital dial gauge is located between the top of the cylinder body and the top of the radial sealing strip; Push the slider assembly to the vicinity of the radial sealing strip, and adjust the axial and radial positions of the digital micrometer at the same time. When the probe contacts the radial sealing strip, the value of the digital micrometer jumps. Record the value of the first measuring ruler to obtain the actual position of the radial sealing strip.

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