阅读说明：本技术 一种极坐标式磁流变阻尼器磁场测试装置 (Magnetic field testing device for polar coordinate type magnetorheological damper ) 是由 马梁 李子俊 范杰 于 2020-07-15 设计创作，主要内容包括：一种极坐标式磁流变阻尼器磁场测试装置。其包括结构主体、激励模块、两个调节模块和测量模块；本发明效果：实现了磁流变阻尼器多维度的测量工作,可以精确调节测量模块旋转角度、俯仰角度、轴向和径向进给长度等参数,便于在主轴减振阻尼器中测量磁流变液工作区域内的磁场强度。可以有效模拟各临界转速条件下的磁流变阻尼器减振控制情况,并测量磁流变阻尼器在动态工况下磁流变液各处的磁场强度。可以在磁流变阻尼器减振控制状态下,模拟航空发动机在翼工作状态中各种典型主轴不对中故障,通过控制磁流变阻尼器磁场强度大小改善主轴的异常振动情况,从而验证阻尼器设计性能参数。(A magnetic field testing device for a polar coordinate type magnetorheological damper. The device comprises a structure main body, an excitation module, two adjusting modules and a measuring module; the invention has the following effects: the multi-dimensional measurement work of the magnetorheological damper is realized, the parameters such as the rotation angle, the pitching angle, the axial and radial feeding length and the like of the measurement module can be accurately adjusted, and the magnetic field intensity in the working area of the magnetorheological damper can be conveniently measured in the main shaft vibration damper. The vibration reduction control condition of the magnetorheological damper under each critical rotating speed condition can be effectively simulated, and the magnetic field intensity of each part of the magnetorheological damper under the dynamic working condition is measured. The method can simulate various typical main shaft misalignment faults of an aircraft engine in a wing working state under the vibration attenuation control state of the magneto-rheological damper, and improve the abnormal vibration condition of the main shaft by controlling the magnetic field intensity of the magneto-rheological damper, so that the design performance parameters of the damper are verified.)

1. A polar coordinate type magnetic field testing device for a magnetorheological damper is characterized in that: the polar coordinate type magnetorheological damper magnetic field testing device comprises a structure main body, an excitation module, two adjusting modules and a measuring module; the structure body comprises a base (1), a supporting block (5), a magneto-rheological damper, a main shaft (14), a main supporting plate (16), an adjusting shell (17) and a transparent cover plate (18); the base (1) is horizontally arranged; the main supporting plate (16) is of an inverted L-shaped structure, the lower end of the main supporting plate is fixed in the middle of the surface of the base (1), and the upper part of the main supporting plate extends towards the left side of the base (1); the supporting block (5) is arranged on the surface of the base (1) below the upper part of the main supporting plate (16); the adjusting shell (17) is of a hollow cylinder structure, is horizontally arranged between the upper part of the main supporting plate (16) and the supporting block (5), and is provided with an extending beam on the circumferential surface of the upper end and the lower end respectively and a plurality of observation windows on the circumferential surface; a transparent cover plate (18) is arranged on each observation window; the magneto-rheological damper comprises an angular contact bearing, magneto-rheological fluid, a squirrel-cage elastic support (13) and a coil shell (19); the left end of the coil shell (19) is connected with the right end of the adjusting shell (17); the right end of the squirrel cage elastic support (13) is arranged at the middle part of the lower part of the main support plate (16), an angular contact bearing is arranged in the center hole of the end, and the left end is positioned in the coil shell (19); the magnetorheological fluid is filled in the coil shell (19); the left end of the main shaft (14) is fixed in a central hole of the angular contact bearing, and the right end of the main shaft protrudes above the right side of the base (1);

the excitation module comprises a coupler (20), a driving motor (21), a motor support (22) and a support seat (23); the lower end of the supporting seat (23) is fixed on the right side surface of the base (1); a driving motor (21) is arranged at the upper end of the supporting seat (23) through a motor supporting seat (22), and an output shaft is connected with the right end of the main shaft (14) through a coupling (20);

the two adjusting modules are respectively arranged above and below the adjusting shell (17), and each adjusting module comprises an adjusting lifting table (2), a rotating sliding table (3) and a Y-axis feed screw (4); the bottom surface or the top surface of the Y-axis feed screw (4) is fixed on the top surface of the supporting block (5) or the upper bottom surface of the main supporting plate (16); the bottom surface or the top surface of the rotary sliding table (3) is fixed on the top surface or the bottom surface of the Y-axis feed screw (4); the bottom surfaces or the top surfaces of the two adjusting lifting platforms (2) are fixed on the top surface or the bottom surface of the rotary sliding table (3), and the top surfaces or the bottom surfaces of the two adjusting lifting platforms (2) are respectively connected to the outer end surfaces of the two extending beams of the adjusting shell (17);

the measuring module comprises a knob (7), an angular contact bearing (6), a rotating table (15), an X-axis feed screw (9), a lifting table (10), an angle feed screw (8), an inverted L-shaped clamp (11) and a Hall probe (12); the angular contact bearing (6) is arranged at the left port of the adjusting shell (17); the knob (7) is arranged outside the adjusting shell (17), and the right end of the knob is fixed in a central hole of the angular contact bearing (6); the rotating platform (15) is positioned in the adjusting shell (17) and the left end of the rotating platform is connected to the inner side surface of the angular contact bearing (6); the X-axis feed screw (9) is fixed on the surface of the rotating platform (15); the lower end of the angle feed screw (8) is fixed on the top surface of the X-axis feed screw (9); the lower end of the lifting platform (10) is fixed on the top surface of the angle feed screw (8); the upper end of the inverted L-shaped clamp (11) is fixed on the top surface of the lifting platform (10), the lower part of the inverted L-shaped clamp is positioned outside the right side of the lifting platform (10), the lower end of the inverted L-shaped clamp is clamped with a Hall probe (12), and the Hall probe (12) is immersed in magnetorheological fluid inside the coil shell (19).

2. The polar magnetorheological damper magnetic field testing apparatus according to claim 1, wherein: the transparent cover plate (18) is of a flip structure.

3. The polar magnetorheological damper magnetic field testing apparatus according to claim 1, wherein: the rotating platform (15) is of a step-shaped cantilever beam structure.

Technical Field

The invention belongs to the technical field of experimental testing devices, and particularly relates to a multi-dimensional and multi-working-condition polar coordinate type magnetic rheological damper magnetic field testing device.

Background

The magneto-rheological damper is a semi-active vibration damper. When the main shaft system of the aero-engine has a misalignment fault, the magneto-rheological damper can control the damping force of the magneto-rheological damper by quickly adjusting the current output of the electromagnetic coil. Due to the sensitive response speed and the wide performance parameter adjusting range of the magneto-rheological damper, the magneto-rheological damper has a good vibration damping application prospect. For example, Zhang Song mountain adopts extrusion type magneto-rheological damper to control and optimize vibration damping of magnetic bearing system, and ren Shenkun adopts magneto-rheological extrusion brake in large torque transmission device.

At present, in a measurement experiment of a magnetorheological device, a measurement method of a handheld teslameter is adopted to evaluate the magnetic field intensity of a working position of the magnetorheological fluid, but the magnetorheological fluid is often in a narrow and interference regular space, so that only some peripheral easy-to-reach points can be indirectly measured, and the direct correspondence with an action area of a theoretically designed magnetic field is difficult, and the authenticity and the accuracy of the experimental verification are greatly reduced. Meanwhile, the existing magnetic field measurement means cannot complete the measurement task of the damper in the working state, and the difference between the magnetic field information obtained by static measurement and the damper use requirement under the complex working condition is large.

In conclusion, the existing magnetic field testing device for the magnetorheological damper still lacks the capability of adjustable measurement of the whole working area of the magnetorheological fluid and simulation and reproduction of dynamic working conditions, so that the magnetic field testing experiment of the magnetorheological damper is misaligned, and the design calculation index is difficult to verify.

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to provide a magnetic field testing apparatus for a polar coordinate type magnetorheological damper.

In order to achieve the aim, the polar coordinate type magnetic rheological damper magnetic field testing device provided by the invention comprises a structure main body, an excitation module, two adjusting modules and a measuring module; the structure main body comprises a base, a supporting block, a magneto-rheological damper, a main shaft, a main supporting plate, an adjusting shell and a transparent cover plate; the base is horizontally arranged; the main supporting plate is of an inverted L-shaped structure, the lower end of the main supporting plate is fixed in the middle of the surface of the base, and the upper part of the main supporting plate extends towards the left side of the base; the supporting block is arranged on the surface of the base below the upper part of the main supporting plate; the adjusting shell is of a hollow cylindrical structure and is horizontally arranged between the upper part of the main supporting plate and the supporting block, the circumferential surfaces of the upper end and the lower end are respectively provided with an extending beam, and the circumferential surfaces are provided with a plurality of observation windows; a transparent cover plate is arranged on each observation window; the magnetorheological damper comprises an angular contact bearing, magnetorheological fluid, a squirrel cage elastic support and a coil shell; the left end of the coil shell 19 is connected with the right end of the adjusting shell; the right end of the squirrel cage elastic support is arranged in the middle of the lower part of the main support plate, an angular contact bearing is arranged in a center hole of the squirrel cage elastic support, and the left end of the squirrel cage elastic support is positioned in the coil shell; the magnetorheological fluid is filled in the coil shell; the left end of the main shaft is fixed in a central hole of the angular contact bearing, and the right end of the main shaft protrudes above the right side of the base;

the excitation module comprises a coupler, a driving motor, a motor support and a supporting seat; the lower end of the supporting seat is fixed on the right side surface of the base; the driving motor is arranged at the upper end of the supporting seat through a motor support, and the output shaft is connected with the right end of the main shaft through a coupling;

the two adjusting modules are respectively arranged above and below the adjusting shell, and each adjusting module comprises an adjusting lifting table, a rotating sliding table and a Y-axis feed screw; the bottom surface or the top surface of the Y-axis feed screw is fixed on the top surface of the supporting block or the upper bottom surface of the main supporting plate; the bottom surface or the top surface of the rotary sliding table is fixed on the top surface or the bottom surface of the Y-axis feed screw; the bottom surfaces or the top surfaces of the two adjusting lifting platforms are fixed on the top surface or the bottom surface of the rotary sliding table, and the top surfaces or the bottom surfaces of the two adjusting lifting platforms are respectively connected to the outer end surfaces of the two extending beams of the adjusting shell;

the measuring module comprises a knob, an angular contact bearing, a rotating table, an X-axis feed screw, a lifting table, an angle feed screw, an inverted L-shaped clamp and a Hall probe; the angular contact bearing is installed at the left port of the adjusting shell; the knob is arranged outside the adjusting shell, and the right end of the knob is fixed in a central hole of the angular contact bearing; the rotating platform is positioned in the adjusting shell, and the left end of the rotating platform is connected to the inner side surface of the angular contact bearing; the X-axis feed screw is fixed on the surface of the rotating platform; the lower end of the angle feed screw is fixed on the top surface of the X-axis feed screw; the lower end of the lifting platform is fixed on the top surface of the angle feed screw; the upper end of the inverted L-shaped clamp is fixed on the top surface of the lifting platform, the lower portion of the inverted L-shaped clamp is located outside the right side of the lifting platform, a Hall probe is clamped at the lower end of the inverted L-shaped clamp, and the Hall probe is immersed in magnetorheological fluid inside the coil shell.

The transparent cover plate is of a flip structure.

The rotating platform is of a ladder-shaped cantilever beam structure.

The invention has the characteristics and beneficial effects that:

(1) the invention mainly realizes the multidimensional measurement work of the magnetorheological damper, can accurately adjust the parameters of the measurement module such as the rotation angle, the pitching angle, the axial and radial feeding length and the like, and is convenient for measuring the magnetic field intensity in the working area of the magnetorheological fluid in the main shaft vibration damper.

(2) The invention can effectively simulate the vibration reduction control condition of the magnetorheological damper under each critical rotating speed condition and measure the magnetic field intensity of the magnetorheological damper at each position under the dynamic working condition.

(3) The method can simulate various typical main shaft misalignment faults of an aircraft engine in a wing working state under the vibration attenuation control state of the magneto-rheological damper, and improve the abnormal vibration condition of the main shaft by controlling the magnetic field intensity of the magneto-rheological damper, so that the design performance parameters of the damper are verified.

Drawings

FIG. 1 is a perspective view of a structure of a lower adjusting module in a magnetic field testing device of a polar coordinate magnetorheological damper.

Fig. 2 is a perspective view of a measuring module structure in the magnetic field testing device of the polar coordinate type magnetorheological damper provided by the invention.

FIG. 3 is a perspective view of a magnetic field testing device of a polar coordinate magnetorheological damper provided by the invention.

Detailed Description

The structure of the present invention will be further described by way of example with reference to the accompanying drawings. It is to be understood that this embodiment is illustrative and not restrictive.

As shown in fig. 1 to 3, the polar coordinate type magnetorheological damper magnetic field testing apparatus provided by the invention comprises a structure main body, an excitation module, two adjusting modules and a measuring module; the structure body comprises a base 1, a supporting block 5, a magneto-rheological damper, a main shaft 14, a main supporting plate 16, an adjusting shell 17 and a transparent cover plate 18; the base 1 is horizontally arranged; the main supporting plate 16 is of an inverted L-shaped structure, the lower end of the main supporting plate is fixed in the middle of the surface of the base 1, and the upper part of the main supporting plate extends to the left side of the base 1; the supporting block 5 is arranged on the surface of the base 1 below the upper part of the main supporting plate 16; the adjusting shell 17 is a hollow cylinder structure, is horizontally arranged between the upper part of the main supporting plate 16 and the supporting block 5, is provided with an extending beam on the circumferential surface of the upper end and the lower end respectively, and is provided with a plurality of observation windows; a transparent cover plate 18 is arranged on each observation window; the magneto-rheological damper comprises an angular contact bearing, magneto-rheological fluid, a squirrel-cage elastic support 13 and a coil shell 19; the left end of the coil housing 19 is connected to the right end of the adjusting housing 17; the right end of the squirrel cage elastic support 13 is arranged at the middle part of the lower part of the main support plate 16, an angular contact bearing is arranged in the center hole of the end, and the left end is positioned in the coil shell 19; the magnetorheological fluid is filled in the coil shell 19; the left end of the main shaft 14 is fixed in the central hole of the angular contact bearing, and the right end of the main shaft protrudes above the right side of the base 1;

the excitation module comprises a coupler 20, a driving motor 21, a motor support 22 and a support seat 23; the lower end of the supporting seat 23 is fixed on the right side surface of the base 1; a driving motor 21 is arranged at the upper end of the supporting seat 23 through a motor support 22, and an output shaft is connected with the right end of the main shaft 14 through a coupling 20;

the two adjusting modules are respectively arranged above and below the adjusting shell 17, and each adjusting module comprises an adjusting lifting table 2, a rotating sliding table 3 and a Y-axis feed screw 4; the bottom surface or the top surface of the Y-axis feed screw 4 is fixed on the top surface of the supporting block 5 or the upper bottom surface of the main supporting plate 16; the bottom surface or the top surface of the rotary sliding table 3 is fixed on the top surface or the bottom surface of the Y-axis feed screw 4; the bottom surfaces or the top surfaces of the two adjusting lifting platforms 2 are fixed on the top surface or the bottom surface of the rotary sliding table 3, and the top surfaces or the bottom surfaces of the two adjusting lifting platforms 2 are respectively connected to the outer end surfaces of the two extending beams of the adjusting shell 17;

the measuring module comprises a knob 7, an angular contact bearing 6, a rotating table 15, an X-axis feed screw 9, a lifting table 10, an angle feed screw 8, an inverted L-shaped clamp 11 and a Hall probe 12; the angular contact bearing 6 is installed at the left port of the adjusting shell 17; the knob 7 is arranged outside the adjusting shell 17, and the right end of the knob is fixed in a central hole of the angular contact bearing 6; the rotating platform 15 is positioned in the adjusting shell 17, and the left end of the rotating platform is connected to the inner side surface of the angular contact bearing 6; the X-axis feed screw 9 is fixed on the surface of the rotary table 15; the lower end of the angle feed screw 8 is fixed on the top surface of the X-axis feed screw 9; the lower end of the lifting platform 10 is fixed on the top surface of the angle feed screw 8; the upper end of the inverted-L-shaped clamp 11 is fixed on the top surface of the lifting platform 10, the lower part of the inverted-L-shaped clamp is positioned outside the right side of the lifting platform 10, the lower end of the inverted-L-shaped clamp clamps a Hall probe 12, and the Hall probe 12 is immersed in the magnetorheological fluid inside the coil shell 19.

The transparent cover 18 is a flip structure.

The rotating platform 15 is a step-shaped cantilever beam structure.

The working principle of the polar coordinate type magnetorheological damper magnetic field testing device provided by the invention is explained as follows:

1. the left-right direction is set as the X-axis direction, the front-back direction is set as the Y-axis direction, and the vertical direction is set as the Z-axis direction. And adjusting the rotary sliding table 3, the Y-axis feed screw 4 and the rotary screw of the lifting adjusting table 2 on the adjusting module to return the positions to the initial positions. And opening the transparent cover plate 18, adjusting the angle feed screw-8, the X-axis feed screw 9 and the rotary screw of the lifting platform 10 on the measuring module to return the positions to the initial positions, and zeroing each part.

2. The spindle 14 misalignment condition to be simulated is selected. The position of the adjusting shell 17 in the horizontal direction is controlled by synchronously adjusting the rotating lead screws of the Y-axis feed lead screws 4 in the upper adjusting module and the lower adjusting module, and the position of the adjusting shell 17 in the vertical direction is controlled by adjusting the adjusting lifting platforms 2 on the upper adjusting module and the lower adjusting module in a mutually matched mode, so that various typical conditions of misalignment of the main shaft 14 can be simulated. The deflection angle of the adjusting shell 17 around the Z axis is controlled by synchronously adjusting the feed screws of the rotary sliding tables 3 on the upper adjusting module and the lower adjusting module, so that the condition of misalignment fault of the inclination of the main shaft 14 is simulated.

3. The static or dynamic working state of the main shaft 14 is selected, in order to observe the influence of vibration generated in the rotation process of the main shaft 14 on the misalignment of the main shaft 14, the driving motor 21 can be started, the driving motor 21 can generate output torque, the specified rotating speed is output, and the main shaft 14 is driven to rotate through the coupler 20. The method for adjusting the misalignment of the spindle 14 in the dynamic working state is similar to the step 2.

4. The measuring module is adjusted according to the position of the magnetorheological fluid to be measured, the position of the Hall probe 12 clamped by the L-shaped clamp 11 relative to the spindle 14 in the radial direction of the spindle is controlled by adjusting the height of the lifting platform 10 on the measuring module, and the position of the Hall probe 12 relative to the spindle 14 in the axial direction of the spindle is controlled by adjusting the rotary lead screw of the X-axis feed lead screw 9. When the inclination fault of the main shaft 14 is simulated, the rotating screw rod of the angle feed screw rod 8 needs to be adjusted to control the inclination angle of the Hall probe 12 relative to the horizontal plane, and the Hall probe 12 rotates for a circle in the magnetorheological fluid by the adjusting knob 7, so that the magnetic field intensity of each part of the magnetorheological fluid is measured and recorded.

5. The drive motor 21 is turned off, the hall probe 12 located within the magnetorheological fluid is removed, and the measurement module and the adjustment module are returned to the initial position.