Circumferential bending rigidity calibration equipment for aerospace high-precision shafting

Abstract

An aerospace high-precision shafting circumferential bending rigidity calibration device comprises a measuring platform, the measuring platform is connected with the fixed end of a to-be-measured shafting through a measuring base, the displacement end of the to-be-measured shafting is fixedly connected with one end of a force arm tool, and the force arm tool is provided with an external reflector moving along with the displacement end of the to-be-measured shafting; the measuring platform is provided with a radial loading mechanism capable of applying a radial load to the displacement end of the to-be-measured shafting, the radial loading mechanism is provided with a joint motor capable of moving in the radial direction of the to-be-measured shafting, and the joint motor is in transmission fit with the force arm tool through a belt so as to adjust the circumferential position of the to-be-measured shafting; a photoelectric autocollimator body is arranged on the measuring platform, and a light path of the photoelectric autocollimator body can penetrate through an inner cavity of a to-be-measured shafting and is matched with an external reflector to detect the deflection angle of the displacement end of the to-be-measured shafting when the displacement end is subjected to a radial load; the device can continuously calibrate multiple bending rigidities in the circumferential direction of the shaft system, manual intervention is little, errors are small, and calibration efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of shafting measurement, in particular to a kind of aerospace high-precision shafting circumferential bending stiffness calibration equipment. BACKGROUND

[0002] At present, in the rotary main shaft applied to the aerospace shafting assembly produced in the company, the shafting assembly is the core point in the assembly of complete machine, to detect the assembly precision of shafting assembly, ensure the mechanical properties of complete machine, after assembly is completed, the shafting assembly needs to be calibrated to determine the consistency and reliability of shafting assembly.

[0003] When circumferential bending stiffness is calibrated, spring scale is needed to exert radial force on the shafting to be measured, and the operator rotates a certain angle in the circumferential direction of the rotating shaft of the shafting assembly, and the next measurement is carried out, and the circumferential bending stiffness is calibrated by rotating at least 4 places uniformly, and the axial bending degree of the shafting assembly is calibrated for about 1-2 hours, and the measurement process and results are recorded and calculated manually. In the whole circumferential bending stiffness calibration process, personnel is occupied too much, error is uncontrollable and time-consuming is too long, which is not conducive to improving productivity, and an economical calibration time, personnel occupation reduction and productivity increase method and equipment are urgently needed. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of aerospace high-precision shafting circumferential bending stiffness calibration equipment, can continuously calibrate multiple bending stiffness in circumferential direction, less manual intervention, small error, high calibration efficiency.

[0005] The utility model adopts the technical scheme: a kind of aerospace high-precision shafting circumferential bending stiffness calibration equipment, including measuring platform, measuring platform is connected with the fixed end of the shafting to be measured by measuring base, the displacement end of the shafting to be measured is fixedly connected with the one end of force arm tooling, force arm tooling is equipped with the in-vivo reflector that moves with the displacement end of the shafting to be measured;

[0006] Measuring platform is equipped with the radial loading mechanism that can exert radial load on the displacement end of the shafting to be measured, the radial loading mechanism has joint motor that can move along the radial direction of the shafting to be measured, joint motor is kept transmission cooperation with force arm tooling by belt to adjust the circumferential position of the shafting to be measured;

[0007] Measuring platform has photoelectric autocollimator body, the light path of photoelectric autocollimator body can pass through the inner cavity of the shafting to be measured and cooperate with the in-vivo reflector to detect the deflection angle of the displacement end of the shafting to be measured when subjected to radial load.

[0008] As preferred scheme, joint motor and force arm tooling are equipped with pulley matched with belt.

[0009] As a preferred embodiment, the radial loading mechanism includes a base, a loading cylinder, a joint motor slider, and a force sensor;

[0010] The base is fixed on the measuring platform, and a joint motor slider that can be displaced radially along the axis to be measured is slidably connected to the base. The joint motor is mounted on the joint motor slider. The base is also provided with a loading cylinder. The cylinder arm of the loading cylinder is connected to one end of the force sensor, and the other end of the force sensor is connected to the joint motor slider.

[0011] As a preferred embodiment, the measuring platform is provided with a positioning pin capable of stopping and centering the measuring base.

[0012] As a preferred embodiment, the measuring platform is provided with a clamping mechanism capable of clamping the measuring base.

[0013] As a preferred embodiment, the joint motor is a servo motor.

[0014] As a preferred embodiment, the measuring base has bolt holes at both ends for connecting the measuring platform and the shaft system to be measured, respectively.

[0015] As a preferred embodiment, the photoelectric autocollimator body includes an adjustment mechanism and a calibration lens mounted on a measurement platform. The movable end of the adjustment mechanism is provided with a main body, and the calibration lens is opposite to the main body and can refract the light path emitted by the main body into the inner cavity of the axis to be measured.

[0016] As a preferred embodiment, the bending stiffness of the lever arm fixture is much greater than the bending stiffness of the shaft system under test.

[0017] As a preferred option, a host computer is included that is electrically connected to the photoelectric autocollimator body.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. Automatic centering and positioning enable rapid clamping and accurate positioning of shaft components, thereby reducing labor, improving work efficiency, and ensuring the accuracy of measurement results.

[0020] 2. By transmitting controllable radial load to the lever arm tooling via belt and adjusting the circumferential position, the problem of measuring the circumferential bending stiffness of the shaft system is solved. This enables the continuous calibration of bending stiffness at multiple positions in the circumferential direction without the need for manual adjustment, reducing human error and improving calibration efficiency.

[0021] 3. Only one lever arm tooling is used to transmit bending torque, which greatly reduces the use of tooling, saves costs, and makes operation more convenient.

[0022] 4. Through the host computer acquisition, real-time feedback of the measured shafting bending moment, the bending stiffness value is calculated by computer, the result is more reliable, and the repeated measurement accuracy is higher.

[0023] 5. Through the adjustment of the applied load, the shafting bending curve can be drawn according to the change of the load force, the bending of the shafting under certain span load is clear at a glance, and one machine has multiple functions. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0025] Figure 1 It is a front view schematic diagram of the present application;

[0026] Figure 2 It is a side view schematic diagram of the present application;

[0027] Figure 3 It is a top view schematic diagram of the present application.

[0028] Reference signs: 1, measurement platform, 2, measurement base, 3, shafting to be measured, 4, force arm tooling, 5, external reflector, 6, joint motor, 7, belt, 8, photoelectric autocollimator body, 801, adjusting mechanism, 802, calibration lens, 803, main part, 804 light path, 9, pulley, 10, base, 11, loading cylinder, 12, joint motor sliding block, 13, force sensor, 14, clamping mechanism, 15, host computer, 16, positioning stop pin. DETAILED DESCRIPTION

[0029] In the following, the present application will be specifically described through exemplary embodiments. However, it should be understood that the elements, structures and features in one embodiment can also be beneficially combined into other embodiments without further description.

[0030] It should be noted that: unless otherwise defined, the technical terms or scientific terms used herein should be understood as the usual meaning understood by those skilled in the art to which the utility model belongs. The "one", "a" or "the" and similar words used in the utility model patent application description and claims do not represent quantity limitation, but indicate that there is at least one; The "first", "second" and "third" used in this paper should not be regarded as the limitation of the order of components, but only as a distinction between different components; "Include" or "contain" and similar words indicate that the elements or objects appearing before "include" or "contain" cover the elements or objects listed after "include" or "contain" and their equivalents, but do not exclude other elements or objects with the same function.

[0031] In order to more clearly describe the specific structure of the aerospace high-precision shaft system circumferential bending stiffness calibration equipment, combined with the attached Figures 1-3 The embodiment is described:

[0032] As Figure 1 And Figure 2 The aerospace high-precision shaft system circumferential bending stiffness calibration equipment includes a measuring platform 1, the measuring platform 1 is connected with the fixed end of the shaft system 3 to be measured through the measuring base 2, the displacement end of the shaft system 3 to be measured is fixedly connected with one end of the force arm tooling 4 (the whole hollow of the shaft system 3 to be measured, and the fixed end and the displacement end can rotate relatively along the axis itself), the force arm tooling 4 is provided with an extracorporeal mirror 5 which moves with the displacement end of the shaft system 3 to be measured; The measuring platform 1 is provided with a radial loading mechanism which can exert a radial load on the displacement end of the shaft system 3 to be measured, and the radial loading mechanism has a joint motor 6 which can move along the radial direction of the shaft system 3 to be measured; The joint motor 6 is in transmission cooperation with the force arm tooling 4 through the belt 7 to adjust the circumferential position of the shaft system 3 to be measured; The measuring platform 1 has an optical self-collimation instrument body 8, and the light path of the optical self-collimation instrument body 8 can pass through the inner cavity of the shaft system 3 to be measured and cooperate with the extracorporeal mirror 5 to detect the deflection angle of the displacement end of the shaft system 3 to be measured when it is subjected to a radial load.

[0033] In the above embodiment, the radial loading mechanism includes a base 10, a loading cylinder 11, a joint motor sliding block 12 and a force sensor 13, the base 10 is fixed on the measuring platform 1, the base 10 is slidably connected with the joint motor sliding block 12 which can displace along the radial direction of the shaft system 3 to be measured, the joint motor 6 is installed on the joint motor sliding block 12, the base 10 is further provided with the loading cylinder 11, the cylinder arm of the loading cylinder 11 is connected with one end of the force sensor 13, the other end of the force sensor 13 is connected with the joint motor sliding block 12; The output shaft of the joint motor 6 and the displacement end of the force arm tooling 4 are both provided with belt pulleys 9 which cooperate with the belt 7, and the two belt pulleys 9 are connected through the belt 7;

[0034] The joint motor slider 12 and the joint motor 6 (not working at this time) are driven to move radially by the loading cylinder 11, and the radial load generated by the displacement is transmitted to the displacement end of the force arm tool 4 through the belt 7, and the bending moment corresponding to the applied radial load is fed back through the force sensor 13. The fixed end (lower end) of the shaft system 3 to be measured remains unchanged, and the displacement end (upper end) of the shaft system 3 to be measured is offset after being subjected to the radial load transmitted by the force arm tool 4. The external reflector 5 deflects with the displacement end of the shaft system 3 to be measured, and the deflection angle of the external reflector 5 is detected by the photoelectric autocollimator body 8. The bending stiffness of the shaft system 3 to be measured at the circumferential position can be obtained by calculation.

[0035] The joint motor 6 can be a servo motor, which can adjust and feed back the angle or circumferential position of the displacement end of the shaft system 3 to be measured.

[0036] In the above embodiment, the material of the measurement platform 1 can be QT600 cast iron, which has good rigidity and good shock absorption performance, providing a basis for subsequent measurement.

[0037] Referring to Figure 1 and Figure 3 The measurement platform 1 is provided with a positioning stop pin 16 capable of stopping and centering the measurement base 2 and a clamping mechanism 14 capable of clamping the measurement base 2. First, the positioning stop pin 16 is used for rapid centering, and then the measurement base 2 is clamped and stabilized by the clamping mechanism 14.

[0038] The measurement base 2 is designed as a rotary body structure, the positioning stop pin 16 is not less than three, and the connecting lines of the three positioning stop pins 16 form a circular arc on the surface of the measurement platform 1. The central angle of the circular arc is less than 180°, and is concentric with the center through hole of the measurement base 2. After the outer circular surface of the measurement base 2 is in contact with all the positioning stop pins 16 at the same time, the measurement base 2 and the shaft system 3 to be measured are centered.

[0039] The clamping mechanism 14 can be composed of a plurality of clamping cylinders distributed circumferentially along the measurement base 2. The measurement base 2 is clamped by synchronously extending the plurality of clamping cylinders, so as to position the shaft system 3 to be measured. After centering and positioning, the accuracy of the position of the measurement base 2 and the shaft system 3 to be measured on the measurement platform 1 is ensured.

[0040] The measuring base 2 is used for adapting different sizes of shafting assemblies, and can avoid damage caused by directly clamping the shafting 3 to be measured during the test; the measuring base 2 is a hollow structure, and the light path of the photoelectric autocollimator body 8 can pass through; the two ends of the measuring base 2 are provided with bolt holes for connecting the measuring platform 1 and the shafting 3 to be measured respectively, and after the centering and positioning of the measuring base 2 are completed, the measuring base 2 is connected and fixed with the measuring platform 1 and the shafting 3 to be measured through the bolt holes and bolts.

[0041] The force arm tool 4 is a rotary body structure, the upper end of which is fixed with a belt pulley, and the lower end of which is provided with a bolt hole for connecting the shafting 3 to be measured; the force arm tool 4 extends along the axial direction of the shafting 3 to be measured, increases the force arm, and is beneficial to driving the shafting 3 to be measured to bend through a smaller radial load; the bending stiffness of the force arm tool 4 is much greater than that of the shafting 3 to be measured, and the interference on the calibration result is reduced.

[0042] Referring to Figure 1 , the photoelectric autocollimator body 8 includes an adjusting mechanism 801 arranged on the measuring platform 1 and a calibration lens 802, the movable end of the adjusting mechanism 801 is provided with a main body part 803, and the calibration lens 802 is opposite to the main body part 803 and can refract the light path 804 emitted by the main body part 803 to the inner cavity of the shafting 3 to be measured; the calibration lens 802 can be placed 45° below the measuring base 2, the light path 804 emitted by the main body part 803 is reflected through the calibration lens 802, the measuring base 2 and the shafting 3 to be measured, and finally contacts the external reflector 5 and is reflected by the external reflector 5 to the main body part 803, and the deflection angle of the displacement end of the shafting 3 to be measured and the external reflector 5 is judged by the main body part; the adjusting mechanism 801 is used to drive the main body part 803, so that the light path emitted by the main body part 803 can be on the center line of the measuring base 2 and the shafting 3 to be measured.

[0043] The measuring platform 1 is provided with an upper computer 15 electrically connected with the photoelectric autocollimator body 8 and the force sensor 13 respectively, the bending moment corresponding to the applied radial load and the deflection angle of the displacement end of the shafting 3 to be measured when the radial load is applied are obtained through the data acquisition system of the upper computer 15, the upper computer calculates the bending stiffness according to the indication values of the bending moment and the deflection angle, and outputs the calculation result to the software interface of the upper computer; the measuring platform 1 is also provided with a pneumatic unit for controlling the loading cylinder 11.

[0044] The use process of the aerospace high-precision shafting circumferential bending stiffness calibration device is as follows:

[0045] Step 1, first, the fixed end of the shafting to be measured 3 and the measuring base 2 are connected and fixed as a whole by bolts, and after completion, they are pushed onto the measuring platform 1, rapid centering is realized through the positioning stop pin 16, then the measuring base 2 is clamped and stabilized through the clamping mechanism 14, and then the lower end of the force arm tool 4 is fixed on the upper end of the shafting to be measured 3 through bolts, and the belt 7 is used to connect the belt pulley on the output shaft of the joint motor 6 and the belt pulley at the upper end of the force arm tool 4;

[0046] Step 2, click "start measurement" on the software interface of the upper computer 15, load the cylinder 11 to apply a pushing force under the control of the pneumatic unit, and at the same time, the piston rod pushes out forward, and the joint motor sliding block 12 pushes the belt 7 to be pre-tightened;

[0047] Step 3, the loading cylinder 11 further tightens the belt 7, and a bending moment is applied to the upper end of the force arm tool 4, the bending moment is transmitted to the shafting to be measured 3 along the force arm tool 4, the force arm of the force arm tool 4 and the shafting to be measured 3 is a fixed value, and the bending moment value can be obtained through the calculation of force and force arm, and the bending moment value corresponding to the current load is displayed in real time by the upper computer 15;

[0048] Step 4, after the bending moment and the deflection angle are obtained by the software of the upper computer 15, the bending stiffness under the current bending moment is calculated, and the single measurement data is saved;

[0049] Step 5, after the single measurement is completed, the joint motor 6 rotates the shafting to be measured 3 by a preset angle in the circumferential direction through the belt 7 and the force arm tool 4 according to the preset steps for next measurement, and the rotation preset angle is input by the upper computer operation;

[0050] The bending stiffness data of multiple positions in the circumferential direction are displayed by the upper computer 15, and thus the calibration of the bending stiffness of the shafting to be measured in the circumferential direction is completed.

[0051] The utility model has remarkable effect in the aspect of measuring the circumferential bending degree of the shafting, can be used for measurement in occasions with specific performance and mechanical requirements for the shafting, and has wide market application.

[0052] The parts not described in detail in the above embodiment are prior art.

[0053] It should be noted that although the utility model has been described through the above embodiments, the utility model can also have other various embodiments. Those skilled in the art can obviously make various corresponding changes and modifications to the utility model without departing from the spirit and scope of the utility model, but these changes and modifications should all belong to the scope protected by the claims and equivalents of the utility model.

Claims

1. An aerospace high-precision shafting circumferential bending stiffness calibration device, characterized in that: The application relates to a shafting displacement angle measurement device, which comprises a measurement platform (1), a measurement base (2) and a shafting (3) to be measured. The measurement platform (1) is provided with a radial loading mechanism capable of exerting a radial load on the displacement end of the shafting (3) to be measured, and the radial loading mechanism is provided with an articulated motor (6) capable of moving along the radial direction of the shafting (3) to be measured. The measurement platform (1) is provided with an electro-optical autocollimator body (8), and the light path of the electro-optical autocollimator body (8) can pass through the inner cavity of the shafting (3) to be measured and cooperate with the external mirror (5) to detect the deflection angle of the displacement end of the shafting (3) to be measured when the radial load is applied.

2. The aerospace high-precision shafting circumferential bending stiffness calibration device according to claim 1, characterized in that: The articulated motor (6) and the force arm tool (4) are provided with belt pulleys (9) matched with the belt (7).

3. The aerospace high-precision shafting circumferential bending stiffness calibration device according to claim 1, wherein: The radial loading mechanism comprises a base (10), a loading cylinder (11), an articulated motor sliding block (12) and a force sensor (13). The base (10) is fixed on the measurement platform (1), and the articulated motor sliding block (12) capable of moving along the radial direction of the shafting (3) to be measured is slidably connected to the base (10), the articulated motor (6) is installed on the articulated motor sliding block (12), and the base (10) is further provided with the loading cylinder (11), one end of the cylinder arm of the loading cylinder (11) is connected with the force sensor (13), and the other end of the force sensor (13) is connected with the articulated motor sliding block (12).

4. The aerospace high-precision shafting circumferential bending stiffness calibration device according to claim 1, characterized in that: The measurement platform (1) is provided with a positioning stop pin (16) capable of stopping and centering the measurement base (2).

5. The aerospace high-precision shafting circumferential bending stiffness calibration device according to claim 1, characterized in that: The measurement platform (1) is provided with a clamping mechanism (14) capable of clamping the measurement base (2).

6. The aerospace high-precision shafting circumferential bending stiffness calibration device according to claim 1, characterized in that: The articulated motor (6) is a servo motor.

7. The aerospace high-precision shafting circumferential bending stiffness calibration device according to claim 1, characterized in that: The measurement base (2) is provided with bolt holes respectively used for connecting the measurement platform (1) and the shafting (3) to be measured.

8. The aerospace high-precision shafting circumferential bending stiffness calibration device according to claim 1, characterized in that: The electro-optical autocollimator body (8) comprises an adjusting mechanism (801) and a calibration lens (802) arranged on the measurement platform (1), the movable end of the adjusting mechanism (801) is provided with a main body part (803), the calibration lens (802) is opposite to the main body part (803) and can refract the light path emitted by the main body part (803) to the inner cavity of the shafting (3) to be measured.

9. The aerospace high-precision shafting circumferential bending stiffness calibration device according to claim 1, characterized in that: The bending stiffness of the force arm tool (4) is much larger than the bending stiffness of the shafting (3) to be measured.

10. The high-precision aero-engine shaft circumferential bending stiffness calibration device according to claim 1, characterized in that: The application further comprises an upper computer (15) electrically connected with the electro-optical autocollimator body (8).

Images