A dust removal device for aero-generator production line maintenance shutdown

Abstract

The application relates to a dust removal device for an aero-generator production line maintenance shutdown, which comprises a rotary workbench and an aero-generator fixedly installed on the rotary workbench; the rotary workbench comprises a work position installation disc and a rotary seat assembly arranged on the work position installation disc, a polishing robot and a dust removal device are arranged on the work position installation disc; the aero-generator is fixedly arranged on the rotary seat assembly; the included angle between the polishing robot and the dust removal device matches the included angle between two adjacent blades, and the polishing robot is located downstream of the dust removal device; the dust removal device comprises a base and an operating arm movably installed on the base, a gantry type mounting seat is installed at the end of the operating arm away from the base, and a pair of dust removal assemblies are movably installed on the inner side of the gantry type mounting seat; the dust removal assembly comprises a spraying unit and a scrubbing unit, the spraying unit is fixedly installed on the inner side of the gantry type mounting seat, and the scrubbing unit is movably installed on the inner side of the gantry type mounting seat.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of aircraft, and particularly relates to a dust removal device for maintenance of an aero-generator production line. BACKGROUND

[0002] A ram air turbine (RAT) system is an emergency power device of a modern aircraft, and belongs to an aero-generator, which can provide emergency energy in an emergency situation where the aircraft loses main power and auxiliary power, and ensures flight safety. Generally, the RAT system is composed of a turbine, a transmission system, an electrical system and a control system. Among them, the turbine converts the ram air energy into kinetic energy, and then the kinetic energy is converted into electrical energy through the electrical system (generator).

[0003] During the process of regular shutdown maintenance of the RAT, the turbine blades need to be polished and dusted, and the dusting needs to be performed first and then the polishing according to the process.

[0004] At present, the shutdown maintenance production line of the aero-generator is mostly in a straight line mode, and the aero-generator is moved to another work station for polishing operation after all the turbine blades are dusted at one work station. Therefore, the work efficiency is undoubtedly affected.

[0005] In addition, in order to ensure the efficiency and polishing quality of dusting, an automatic control dusting system based on a robot is commonly used at present, which requires a certain pressure of the dusting and scrubbing on the turbine blades during the scrubbing process, and has strong adaptability to the shape of the turbine blade surface.

[0006] The existing automatic control dusting system still has deficiencies in scrubbing the complex curved surface of the turbine blade. During the scrubbing process, the two sides of the turbine blade need to be scrubbed respectively, which affects the scrubbing efficiency. After long-term use, the spring for guaranteeing the pressure scrubbing will have performance degradation, which leads to reduced pressure and affects the scrubbing effect.

[0007] Therefore, there is an urgent need for a dust removal device for maintenance of an aero-generator production line, which can solve the above problems. SUMMARY

[0008] In order to solve the above problems, the application provides a dust removal device for maintenance of an aero-generator production line, which comprises a rotating workbench and an aero-generator fixedly installed on the rotating workbench.

[0009] The rotating workbench comprises a work station mounting disc and a rotating seat assembly arranged on the work station mounting disc, and a polishing robot and a dust removal device are arranged on the work station mounting disc; the aero-generator is fixedly arranged on the rotating seat assembly through a clamping assembly.

[0010] The included angle between the polishing robot and the dust removal device matches the included angle between two adjacent turbine blades, and the polishing robot is located downstream of the dust removal device.

[0011] The dust removal device comprises a base and an operating arm movably mounted on the base, and a gantry mounting seat is mounted at the end of the operating arm away from the base, and a pair of dust removal assemblies are movably mounted on the inner side of the gantry mounting seat.

[0012] The dust removal assembly comprises a spraying unit and a scrubbing unit, and the spraying unit is fixedly mounted on the inner side of the gantry mounting seat, and the scrubbing unit is movably mounted on the inner side of the gantry mounting seat.

[0013] The gantry mounting seat is in a U-shaped structure, comprising two horizontal seats and a vertical seat, and a power unit is further mounted on the outer side of the horizontal seat, and the power unit can be drivingly connected with the scrubbing unit through a screw nut.

[0014] Further, the spraying unit is connected to a cleaning agent storage part and a clean water storage part.

[0015] Further, the spraying unit comprises a mounting seat and a linkage plate arranged on the mounting seat, the mounting seat is fixedly mounted on the inner side of the gantry mounting seat, and a plurality of electric push rods are fixedly mounted on the mounting seat, the action end of the electric push rod is fixedly connected with the linkage plate, and a plurality of spray head units are arranged on the linkage plate.

[0016] Further, the mounting seat comprises a plurality of arrayed mounting plates and a pair of long plates arranged below the mounting plates, and the mounting plates are fixedly mounted on the inner side of the gantry mounting seat.

[0017] The lower end of each mounting plate is integrally provided with a pair of connecting plates, and the long plates are fixedly connected with the connecting plates of each mounting plate.

[0018] The plurality of electric push rods are fixedly mounted between the pair of long plates, and the action end of the electric push rod is fixedly connected with the linkage plate through a connecting lug.

[0019] The plurality of spray head units penetrate the space between the pair of long plates, and the upper end is fixedly connected with the linkage plate.

[0020] Further, the scrubbing unit comprises a mounting seat pipe and a connecting pipe arranged in the mounting seat pipe and being retractable, and the dust removal scrubbing unit is mounted at the lower end of the connecting pipe.

[0021] The connecting pipe is configured to have two positions of a working position and a waiting position, when in the working position, the connecting pipe is extended out of the mounting seat pipe, and when in the waiting position, the connecting pipe is retracted into the mounting seat pipe.

[0022] Further, the connecting pipe comprises an outer pipe and an inner pipe arranged in the outer pipe and being elastically retractable, and the dust removal scrubbing unit is fixedly mounted at the end of the inner pipe away from the outer pipe.

[0023] Further, the outer tube is internally formed with a cavity, the upper end of which is closed, the lower end of which is open, and the size of the opening is smaller than that of the cavity;

[0024] The upper end of the inner tube is located in the cavity, and the lower end is fixedly connected with the dust removal and wiping unit;

[0025] The middle section of the inner tube is formed with a neck portion, and the size of the neck portion is equal to that of the opening;

[0026] An elastic unit is arranged in the cavity, and one end of the elastic unit is fixedly installed on the closed end of the cavity, and the other end is fixedly installed on the top end face of the inner tube.

[0027] Further, the elastic unit comprises a magneto-rheological spring and a spiral spring, the magneto-rheological spring is fixedly installed on the closed end of the cavity, one end of the spiral spring is fixedly installed on the magneto-rheological spring, and the other end is fixedly installed on the top end face of the inner tube;

[0028] The magneto-rheological spring comprises a coil support, a coil and an elastomer unit, the coil support is fixedly installed on the closed end of the cavity, and an inner cylinder and an outer cylinder are sequentially arranged from inside to outside, the coil is wound on the outside of the inner cylinder, the elastomer unit is arranged inside the inner cylinder, and the bottom end of the outer cylinder is inwardly extended and provided with a convex ring.

[0029] Further, when the spiral spring does not have attenuation of the elastic coefficient, the wiping unit does not power the magneto-rheological spring during the working process.

[0030] Further, for the upper wiping unit, the upper end face of the annular flange is provided with a pressure sensor;

[0031] And, when the dust removal and wiping unit is in the standby position, the elastic unit is in the stretched state;

[0032] For the lower wiping unit, the lower end face of the annular flange is provided with a distance sensor;

[0033] And, when the dust removal and wiping unit is in the standby position, the elastic unit is in the compressed state.

[0034] The advantages of the present application are:

[0035] 1. The included angle between the polishing robot and the dust removal device matches the included angle between two adjacent turbine blades, and the polishing robot is located downstream of the dust removal device. After the dust removal of the previous turbine blade is completed, it rotates to the polishing robot, and the polishing of the previous turbine blade and the dust removal of the next turbine blade are carried out at the same time. Therefore, the time cost is greatly saved.

[0036] 2. The aviation generator production line maintenance dust removal device can realize full coverage of the turbine blade scrubbing and can scrub both sides of the turbine blade at the same time, thereby improving the scrubbing efficiency.

[0037] 3. During the turbine blade dust removal process, the electric push rod is in the retracted state and the spray head unit is in the low water pressure working state when the spray unit sprays cleaning agent on the turbine blade, ensuring that more or even all of the cleaning agent is sprayed onto the turbine blade, avoiding waste of cleaning agent; when the spray unit sprays clean water on the turbine blade, the electric push rod is in the elongated state and the spray head unit is in the high water pressure working state, ensuring that the high-pressure clean water completely covers the turbine blade, further ensuring the thoroughness of the turbine blade dust removal.

[0038] 4. The overall elasticity of the elastic unit is changed by adjusting the elastic modulus of the magnetorheological spring. The elastic modulus of the magnetorheological spring can change with the strength of the applied magnetic field, has fast response speed, and can be adjusted in a large range with only a small change in current, and consumes very little energy. At the same time, the cooperation of the magnetorheological spring and the coil spring can also ensure the maximum compression amount of the elastic unit, and better adapt to the curved surface change of the turbine blade.

[0039] 5. Through the dynamic control equation of the upper and lower scrubbing units, the control relationship between the adjustment value of the elastic modulus of the magnetorheological spring and the sensor detection value of the spiral spring elastic modulus attenuation detection sensor is established, which can quickly and accurately adjust the elastic modulus of the magnetorheological spring, and is conducive to dynamically compensating the elastic modulus of the elastic unit, ensuring that the elastic force of the elastic unit on the inner tube is always greater than the threshold value. BRIEF DESCRIPTION OF DRAWINGS

[0040] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not intended to limit the scope of the application. Moreover, the same reference numerals are used throughout the same figures. In the drawings:

[0041] Figure 1 The overall structure diagram of the aviation generator production line maintenance dust removal device;

[0042] Figure 2 The overall structure diagram of the dust removal device;

[0043] Figure 3 The overall structure diagram of the dust removal assembly;

[0044] Figure 4 The overall structure diagram of the spray unit;

[0045] Figure 5 TheFigure 4 Enlarged view of part A;

[0046] Figure 6 Overall structure diagram of the scrubbing unit;

[0047] Figure 7 Partial sectional view of the scrubbing unit;

[0048] Figure 8 For Figure 7 Enlarged view of part B;

[0049] Figure 9 Partial sectional view of the upper scrubbing unit;

[0050] Figure 10 Partial sectional view of the lower scrubbing unit.

[0051] In the figure, the rotating workbench 100, the work station mounting disc 110, the rotating seat assembly 120, the aviation generator 200, the turbine blade 210, the polishing robot 300, the dust removal device 400, the base 410, the operating arm 420, the gantry mounting seat 430, the horizontal seat 431, the vertical seat 432, the dust removal assembly 440, the power unit 450, the clamping assembly 500, the spraying unit 600, the mounting seat 610, the mounting plate 611, the long plate 612, the connecting plate 613, the linkage plate 620, the electric push rod 630, the spray head unit 640, the connecting ear 650, the cable 660, the scrubbing unit 700, the mounting seat pipe 710, the connecting pipe 720, the dust removal scrubbing unit 730, the outer pipe 740, the cavity 741, the opening 742, the annular flange 743, the inner pipe 750, the necked part 751, the pressure sensor 780, the distance sensor 790, the elastic unit 800, the magneto-rheological spring 810, the coil bracket 811, the coil 812, the elastomer unit 813, the convex ring 814, the helical spring 820. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is described and explained below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application. Based on the examples provided in the present application, all other examples obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0053] As Figures 1-10 shown, the present embodiment provides a dust removal device for aviation generator production line maintenance shutdown, which comprises a rotating workbench 100 and an aviation generator 200 fixedly installed on the rotating workbench 100.

[0054] The rotary worktable 100 includes a workstation mounting plate 110 and a rotary seat assembly 120 mounted on the workstation mounting plate 110. The workstation mounting plate 110 is equipped with several work units, such as a grinding robot 300, a dust removal device 400, a painting robot (not shown), and a hoisting manipulator (not shown). The aircraft generator 200 is fixedly mounted on the rotary seat assembly 120 via a clamping assembly 500. Thus, the turbine blades 210 of the aircraft generator 200 are aligned with each work unit via the rotary seat assembly 120, enabling production line-style shutdown maintenance of the aircraft generator 200.

[0055] It is worth noting that in this embodiment, the angle between the grinding robot 300 and the dust removal device 400 in the dust removal device for maintenance shutdown of the aircraft generator production line matches the angle between two adjacent turbine blades 210, and the grinding robot 300 is located downstream of the dust removal device 400.

[0056] like Figure 1 As shown, the aircraft generator 200 has three turbine blades 210. The included angle between the grinding robot 300 and the dust removal device 400 is 120 degrees, and the rotating seat assembly 120 rotates counterclockwise during operation. Thus, after the first turbine blade 210 completes dust removal, it rotates to the grinding robot 300. The grinding of the first turbine blade 210 and the dust removal of the second turbine blade 210 are performed simultaneously, and so on, with the grinding of the second turbine blade 210 and the dust removal of the third turbine blade 210 occurring simultaneously. This significantly saves time and costs.

[0057] It is understood that the aircraft generator 200 generally has 2 to 4 turbine blades 210, and correspondingly, the included angle between the grinding robot 300 and the dust removal device 400 is 180, 120, or 90 degrees. If the positions of the grinding robot 300 and the dust removal device 400 are interchanged, the rotating seat assembly 120 will rotate clockwise during operation. That is, it is only necessary to ensure that the grinding robot 300 is downstream of the dust removal device 400. The rotation direction of the rotating seat assembly 120 should not be construed as a limitation on this embodiment.

[0058] In this embodiment, the dust removal device 400 includes a base 410 and an operating arm 420 movably mounted on the base 410. A gantry-type mounting base 430 is mounted on the end of the operating arm 420 away from the base 410, and a pair of dust removal components 440 are movably mounted on the inner side of the gantry-type mounting base 430.

[0059] The dust removal assembly 440 includes a spray unit 600 and a scrubbing unit 700. The spray unit 600 is fixedly installed inside the gantry mounting base 430, and the scrubbing unit 700 is movably installed inside the gantry mounting base 430.

[0060] It can be understood that the spraying unit 600 is connected with the cleaning agent storage part and the clean water storage part, and when the turbine blade 210 is cleaned, the spraying unit 600 first sprays the cleaning agent on the turbine blade 210, then the scrubbing unit 700 is used to remove the dirt attached to the turbine blade 210, and finally clean water is sprayed to ensure the thoroughness of the cleaning of the turbine blade 210.

[0061] It is worth noting that when the turbine blade 210 is cleaned, the operating arm 420 can reciprocate along the X-axis direction on the base 410, so that the spraying unit 600 and the scrubbing unit 700 can cover the turbine blade 210 in the length direction; the scrubbing unit 700 can reciprocate along the Y-axis direction on the gantry mounting base 430, so that the scrubbing unit 700 can cover the turbine blade 210 in the width direction.

[0062] Meanwhile, the turbine blade cleaning device for maintenance of the aero-generator production line of the embodiment can realize double-sided cleaning of the turbine blade 210 and improve the cleaning efficiency.

[0063] Specifically, the gantry mounting base 430 has a U-shaped structure and includes two horizontal seats 431 and a vertical seat 432. The power unit 450 is further mounted on the outer side of the horizontal seat 431, and the power unit 450 can be drivingly connected to the scrubbing unit 700 through a screw nut, so that the scrubbing unit 700 can reciprocate along the Y-axis direction on the gantry mounting base 430.

[0064] In the embodiment, the spraying unit 600 includes a mounting base 610 and a linkage plate 620 arranged on the mounting base 610. The mounting base 610 is fixedly mounted on the inner side of the gantry mounting base 430, and a plurality of electric push rods 630 are fixedly mounted on the mounting base 610. The action end of the electric push rod 630 is fixedly connected to the linkage plate 620, and a plurality of spray head units 640 are arranged on the linkage plate 620.

[0065] Therefore, when the spraying unit 600 sprays the cleaning agent on the turbine blade 210 during the cleaning process of the turbine blade 210, the electric push rod 630 is in a retracted state, i.e., the linkage plate 620 is in a low position, and the spray head unit 640 is in a low water pressure working state, so that the sprayed cleaning agent is more or even all sprayed to the turbine blade 210, avoiding waste of the cleaning agent; when the spraying unit 600 finally sprays clean water on the turbine blade 210, the electric push rod 630 is in an elongated state, i.e., the linkage plate 620 is in a high position (as shown in FIG. 8B), and the spray head unit 640 is in a high water pressure working state, so that the sprayed high-pressure clean water completely covers the turbine blade 210, further ensuring the thoroughness of the cleaning of the turbine blade 210. Figure 4

[0066] ​Specifically, the mounting seat 610 includes a plurality of arrayed mounting plates 611 fixedly mounted to the inner side of the gantry mounting seat 430, and a pair of large plates 612 arranged below the mounting plates 611; the lower end of each mounting plate 611 is integrally provided with a pair of connecting plates 613, and the large plate 612 is fixedly connected with the connecting plate 613 of each mounting plate 611, thereby increasing the structural strength of the mounting seat 610.

[0067] Among them, a plurality of electric push rods 630 are fixedly mounted between the pair of large plates 612, the action end of the electric push rod 630 is fixedly connected with the linkage plate 620 through the connecting lug 650; a plurality of nozzle units 640 penetrate the space between the pair of large plates 612, and the upper end is fixedly connected with the linkage plate 620; the outer side of the large plate 612 is provided with an electric cable 660 to provide power to each electric push rod 630; a water cable (not shown) is arranged between the pair of large plates 612 to supply water to each nozzle unit 640.

[0068] In this embodiment, the scrubbing unit 700 includes a mounting seat pipe 710 and a connecting pipe 720 arranged in the mounting seat pipe 710 and capable of being extended and retracted, and a dust removal scrubbing unit 730 is mounted at the lower end of the connecting pipe 720.

[0069] Among them, the connecting pipe 720 is configured to have two positions of a working position and a waiting position; when in the working position, the connecting pipe 720 is extended out of the mounting seat pipe 710 so that the dust removal scrubbing unit 730 is in contact with the turbine blade 210; when in the waiting position, the connecting pipe 720 is retracted into the mounting seat pipe 710 to avoid interference between the turbine blade 210 and the dust removal scrubbing unit 730 when the turbine blade 210 enters the position of the dust removal device 400.

[0070] In this embodiment, the connecting pipe 720 includes an outer pipe 740 and an inner pipe 750 arranged in the outer pipe 740 and capable of being elastically extended and retracted, and the dust removal scrubbing unit 730 is fixedly mounted at the end of the inner pipe 750 away from the outer pipe 740. Thus, the dust removal scrubbing unit 730 can be elastically reciprocated in the Z-axis direction, and can be elastically fed in the Z-axis direction along the change of the upper and lower curved surfaces of the turbine blade 210, thereby ensuring the contact force of the dust removal scrubbing unit 730 on the turbine blade 210 and further ensuring the dust removal effect.

[0071] Specifically, the outer tube 740 is internally formed with a cavity 741, the upper end of which is closed, the lower end of which is open 742, and the size of the opening 742 is smaller than that of the cavity 741, so that the opening 742 forms an annular flange 743 protruding inward; the upper end of the inner tube 750 is located in the cavity 741, and the lower end is fixedly connected to the dust removal wiping unit 730; the middle section of the inner tube 750 is formed with a necked portion 751, and the size of the necked portion 751 is equal to the size of the opening 742, so that the annular flange 743 cooperates with the necked portion 751 to guide and limit the displacement of the inner tube 750.

[0072] The cavity 741 is provided with an elastic unit 800, one end of which is fixedly installed at the closed end of the cavity 741, and the other end is fixedly installed at the top end face of the inner tube 750. Thus, when the dust removal wiping unit 730 is working, the inner tube 750 will be retracted into the cavity 741, and the contraction of the elastic unit 800 will generate a spring force on the inner tube 750, and with the change of the curved surface on both sides of the turbine blade 210, the elastic feeding of the dust removal wiping unit 730 in the Z-axis direction is realized, so as to ensure the contact force of the dust removal wiping unit 730 on the turbine blade 210.

[0073] It can be understood that both sides of the turbine blade 210 are curved surfaces, and the distance between the lower end face of the outer tube 740 and the side face of the turbine blade 210 changes during the working process of the dust removal wiping unit 730. The smaller the distance between them, the greater the amount of the inner tube 750 retracted into the cavity 741, and the greater the amount of the elastic unit 800 compressed, and according to Hooke's law, the greater the spring force of the elastic unit 800 on the inner tube 750, and the greater the contact force of the dust removal wiping unit 730 on the turbine blade 210. Similarly, the greater the distance between them, the smaller the spring force of the elastic unit 800 on the inner tube 750, and the smaller the contact force of the dust removal wiping unit 730 on the turbine blade 210. Therefore, when the distance between the lower end face of the outer tube 740 and the side face of the turbine blade 210 is the largest, i.e. the minimum amount of compression of the elastic unit 800, it is only necessary to ensure that the spring force of the elastic unit 800 on the inner tube 750 is greater than a threshold value.

[0074] However, in engineering practice, the elastic unit 800 often uses a mechanical spring, which is affected by various factors, and the elastic coefficient of the elastic unit 800 will decay. Thus, when the distance between the lower end face of the outer tube 740 and the side face of the turbine blade 210 is the largest, although the minimum amount of compression of the elastic unit 800 does not change, the spring force of the elastic unit 800 on the inner tube 750 is less than the threshold value, which affects the dust removal effect.

[0075] In order to solve the above problems, the aero-generator production line maintenance dust removal device of the embodiment is provided with an elastic unit 800 which is a spring of active control type. Thus, when the elastic coefficient of the elastic unit 800 decays, the elastic coefficient of the elastic unit 800 is dynamically compensated, and when the distance between the lower end surface of the outer tube 740 and the side surface of the turbine blade 210 is the largest, the elastic force of the elastic unit 800 to the inner tube 750 is ensured to be greater than a threshold value.

[0076] In the embodiment, the elastic unit 800 comprises a magneto-rheological spring 810 and a coil spring 820. The magneto-rheological spring 810 is fixedly installed at the closed end of the cavity 741, and one end of the coil spring 820 is fixedly installed at the magneto-rheological spring 810, and the other end is fixedly installed at the top end surface of the inner tube 750.

[0077] Thus, the overall elasticity of the elastic unit 800 is changed by adjusting the elastic coefficient of the magneto-rheological spring 810. The elastic modulus of the magneto-rheological spring 810 can change with the applied magnetic field strength, has a fast response speed, and only needs a small current change to adjust the elastic modulus in a large range, and the energy consumption is extremely small. At the same time, the magneto-rheological spring 810 and the coil spring 820 are used in cooperation, and the maximum compression amount of the elastic unit 800 is also ensured, which better adapts to the curved surface change of the turbine blade 210.

[0078] Specifically, the magneto-rheological spring 810 comprises a coil bracket 811, a coil 812 and an elastic body unit 813. The coil bracket 811 is fixedly installed at the closed end of the cavity 741, and is sequentially provided with an inner cylinder and an outer cylinder from inside to outside. The coil 812 is wound outside the inner cylinder, and the elastic body unit 813 is arranged inside the inner cylinder. The bottom end of the outer cylinder is inwardly extended and provided with a convex ring 814 to limit the axial displacement of the elastic body unit 813, and to ensure that one end of the coil spring 820 is fixedly connected to the elastic body unit 813.

[0079] It is worth noting that in the initial state, i.e. when the elastic coefficient of the coil spring 820 does not decay, the magneto-rheological spring 810 can be powered off during the operation of the scrubbing unit 700, so that the magneto-rheological spring 810 is in the initial elastic modulus to save power. When the elastic coefficient of the coil spring 820 decays, the magneto-rheological spring 810 is powered on to adjust its elastic coefficient.

[0080] It can be understood that one side of the turbine blade 210 is inwardly recessed, and the other side is outwardly convex. In the embodiment, the upper end surface of the turbine blade 210 which is outwardly convex is referred to as a convex surface 211, and the other surface is referred to as a recessed surface 212. Correspondingly, the scrubbing unit 700 on one side of the convex surface 211 is referred to as an upper scrubbing unit 760, and the scrubbing unit 700 on the other side of the recessed surface 212 is referred to as a lower scrubbing unit 770.

[0081] In order to detect whether the spring constant of the coil spring 820 is attenuated, in the embodiment, a sensor is arranged on the upper end surface of the annular flange 743.

[0082] Specifically, for the upper scrubbing unit 760, a pressure sensor 780 is arranged on the upper end surface of the annular flange 743; and when the dusting scrubbing unit 730 is in the standby position, the elastic unit 800 is in a stretched state, and the deformation amount of the stretched state is d 上 . Thus, when the dusting scrubbing unit 730 is in the standby position, whether the spring constant of the coil spring 820 is attenuated is detected and determined.

[0083] As shown in Figure 9 , the inner tube 750 is subjected to downward gravity, upward pulling force and supporting force, and the reaction force of the supporting force, i.e. the pressure of the inner tube 750 on the annular flange 743, is detected by the pressure sensor 780. It can be understood that when the spring constant of the coil spring 820 is attenuated, the above-mentioned pulling force becomes smaller, and the pressure of the inner tube 750 on the annular flange 743 increases, i.e. the pressure value detected by the pressure sensor 780 determines whether the spring constant is attenuated.

[0084] For the lower scrubbing unit 770, a distance sensor 790 is arranged on the lower end surface of the annular flange 743; and when the dusting scrubbing unit 730 is in the standby position, the elastic unit 800 is in a compressed state, and the deformation amount of the compressed state is d 下 . Thus, when the dusting scrubbing unit 730 is in the standby position, whether the spring constant of the coil spring 820 is attenuated is detected and determined.

[0085] As shown in Figure 10 , the inner tube 750 is subjected to downward gravity, upward pulling force and supporting force, and the reaction force of the supporting force, i.e. the pressure of the inner tube 750 on the annular flange 743, is detected by the pressure sensor 780. It can be understood that when the spring constant of the coil spring 820 is attenuated, the above-mentioned pulling force becomes smaller, and the pressure of the inner tube 750 on the annular flange 743 increases, i.e. the pressure value detected by the pressure sensor 780 determines whether the spring constant is attenuated.

[0086] In the embodiment, for the upper scrubbing unit 760, when the pressure value P 检 detected by the pressure sensor 780 is greater than the threshold value P0, i.e. the spring constant of the coil spring 820 is attenuated, the spring constant of the magnetorheological spring 810 needs to be adjusted to:

[0087]

[0088] In the formula, k is the adjustment target value of the spring constant of the magnetorheological spring 810 of the upper scrubbing unit 760, G is the initial elastic coefficient of the magnetorheological spring 810 of the upper wiping unit 760, G is the sum of the weights of the inner tube 750 and the dust removal wiping unit 730, and P is the initial elastic coefficient of the magnetorheological spring 810 of the upper wiping unit 760. 检 The pressure value detected by pressure sensor 780, d 上 When the dust removal unit 730 of the upper wiping unit 760 is in the waiting position, the deformation of the elastic unit 800 of the upper wiping unit 760 is stretched. The initial elastic coefficient of the elastic unit 800 of the upper scrubbing unit 760 is the overall elastic coefficient.

[0089] in, In the formula, The initial spring constant of the helical spring 820 of the upper cleaning unit 760.

[0090] In this embodiment, for the lower wiping unit 770, when the distance sensor 790 detects the distance value d 检 When the value exceeds the threshold d0, the elastic coefficient of the helical spring 820 decreases, and the elastic coefficient of the magnetorheological spring 810 needs to be adjusted as follows:

[0091]

[0092] In the formula, The target value for adjusting the elastic coefficient of the magnetorheological spring 810 in the lower cleaning unit 770. Let G be the initial elastic coefficient of the magnetorheological spring 810 of the lower wiping unit 770, G be the sum of the weights of the inner tube 750 and the dust removal wiping unit 730, and d be the initial elastic coefficient of the magnetorheological spring 810 of the lower wiping unit 770. 测 The distance value detected by distance sensor 790. The initial elastic coefficient of the elastic unit 800 of the lower scrubbing unit 770 is the overall elastic coefficient.

[0093] in, In the formula, The initial spring constant of the helical spring 820 of the lower scrubbing unit 770.

[0094] Through the dynamic control equations of the upper cleaning unit 760 and the lower cleaning unit 770, a control relationship is established between the adjustment value of the elastic coefficient of the magnetorheological spring 810 and the sensor detection value of the sensor detecting the attenuation of the elastic coefficient of the helical spring 820. This allows for rapid and precise adjustment of the elastic coefficient of the magnetorheological spring 810, which is beneficial for dynamically compensating the elastic coefficient of the elastic unit 800 and ensuring that the elastic force of the elastic unit 800 on the inner tube 750 is always greater than the threshold.

[0095] It can be understood that the magneto-rheological spring 810 of the embodiment is in a compression working mode, the elastic coefficient of the magneto-rheological spring 810 can be changed with the intensity of the applied magnetic field, that is, can be changed with the applied current, and the functional relationship between the adjustment value of the elastic coefficient of the magneto-rheological spring 810 and the applied current is determined and only related to the parameters of the magneto-rheological spring 810. Therefore, in the compression mode, the control equation of the elastic coefficient of the magneto-rheological spring 810 and the applied current is not given in the embodiment.

[0096] The above merely provides the preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any changes or replacements easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A dust removal device for maintenance shutdown of an aircraft generator production line, characterized in that, Includes a rotary table and an aircraft generator fixedly mounted on the rotary table; The rotary table includes a workstation mounting plate and a rotary seat assembly mounted on the workstation mounting plate. The workstation mounting plate is equipped with a grinding robot and a dust removal device. The aircraft generator is fixedly mounted on the rotary seat assembly via a clamping assembly. The included angle between the grinding robot and the dust removal device matches the included angle between two adjacent turbine blades, and the grinding robot is located downstream of the dust removal device. The dust removal device includes a base and an operating arm movably mounted on the base, and a gantry-type mounting base is installed at the end of the operating arm away from the base. A pair of movably mounted dust removal components are installed on the inner side of the gantry-type mounting base. The dust removal assembly includes a spray unit and a scrubbing unit, with the spray unit fixedly installed inside the gantry-type mounting base and the scrubbing unit movably installed inside the gantry-type mounting base. The gantry-type mounting base has a U-shaped structure, including two horizontal seats and one vertical seat. The power unit is also installed on the outside of the horizontal seats, and the power unit can be connected to the scrubbing unit through a screw nut. The scrubbing unit includes a mounting base tube and a retractable connecting tube installed inside the mounting base tube. A dust removal scrubbing unit is installed at the lower end of the connecting tube. The connecting tube is configured to have two positions: a working position and a waiting position. When it is in the working position, the connecting tube extends out of the mounting base tube; when it is in the waiting position, the connecting tube retracts into the mounting base tube. The connecting pipe includes an outer pipe and an inner pipe that can elastically expand and contract inside the outer pipe. The dust removal and wiping unit is fixedly installed at the end of the inner pipe away from the outer pipe. The outer tube has a cavity inside, which is closed at the top and open at the bottom, and the size of the opening is smaller than the size of the cavity. The upper end of the inner tube is located inside the cavity, and the lower end is fixedly connected to the dust removal and wiping unit; The middle section of the inner tube has a constricted neck, and the size of the constricted neck is equal to the size of the opening. An elastic unit is installed inside the cavity, with one end of the elastic unit fixedly installed at the closed end of the cavity and the other end fixedly installed at the top surface of the inner tube. The elastic unit includes a magnetorheological spring and a helical spring. The magnetorheological spring is fixedly installed at the closed end of the cavity, and one end of the helical spring is fixedly installed on the magnetorheological spring, while the other end is fixedly installed on the top surface of the inner tube. The magnetorheological spring includes a coil support, a coil, and an elastomer unit. The coil support is fixedly installed at the closed end of the cavity, and an inner cylinder and an outer cylinder are arranged sequentially from the inside to the outside. The coil is wound around the outside of the inner cylinder, the elastomer unit is arranged inside the inner cylinder, and a protruding ring is provided at the bottom end of the outer cylinder. For the upper scrubbing unit, a pressure sensor is provided on the upper end face of the annular flange; Furthermore, when the dust removal unit is in the waiting position, the elastic unit is in a stretched state; For the lower scrubbing unit, a distance sensor is provided on the lower end face of the annular flange; Furthermore, when the dust removal unit is in the waiting position, the elastic unit is in a compressed state; For the upper scrubbing unit, when the pressure value P detected by the pressure sensor... 检 When the value exceeds the threshold P0, the spring constant of the helical spring has decayed, and the spring constant of the magnetorheological spring needs to be adjusted as follows: ； In the formula, The target value for adjusting the elastic coefficient of the magnetorheological spring in the upper cleaning unit. Let G be the initial spring constant of the magnetorheological spring of the upper wiping unit, G be the sum of the weights of the inner tube and the dust removal wiping unit, and P be the initial spring constant of the magnetorheological spring of the upper wiping unit. 检 d represents the pressure value detected by the pressure sensor. 上 When the dust removal unit of the upper wiping unit is in the waiting position, the deformation of the elastic unit of the upper wiping unit is stretched. The initial elastic coefficient of the elastic unit of the upper scrubbing unit is the overall elastic coefficient. in, In the formula, The initial spring constant of the helical spring in the upper cleaning unit; For the lower scrubbing unit, when the distance value d detected by the distance sensor... 检 When the value exceeds the threshold d0, the spring constant of the helical spring has decreased, and the spring constant of the magnetorheological spring needs to be adjusted as follows: ； In the formula, The target value for adjusting the elastic coefficient of the magnetorheological spring in the lower cleaning unit. Let be the initial spring constant of the magnetorheological spring of the lower scrubbing unit, G be the sum of the weights of the inner tube and the dust removal scrubbing unit, and d be the initial spring constant of the magnetorheological spring of the lower scrubbing unit. 测 The distance value detected by the distance sensor. The initial elastic coefficient of the elastic element of the lower scrubbing unit is given. in, In the formula, The initial spring constant of the helical spring in the lower scrubbing unit is given.

2. The dust removal device for maintenance shutdown of the aircraft generator production line according to claim 1, characterized in that, The spray unit connects the cleaning agent storage unit and the clean water storage unit.

3. The dust removal device for maintenance shutdown of the aircraft generator production line according to claim 1, characterized in that: The spray unit includes a mounting base and a linkage plate mounted on the mounting base. The mounting base is fixedly installed on the inner side of the gantry-type mounting base, and several electric actuators are fixedly installed on the mounting base. The actuating end of the electric actuator is fixedly connected to the linkage plate, and several spray head units are arranged in an array on the linkage plate.

4. The dust removal device for maintenance shutdown of the aircraft generator production line according to claim 3, characterized in that, The mounting base includes several mounting plates arranged in an array and a pair of long plates located below the mounting plates. The mounting plates are fixedly installed on the inside of the gantry-type mounting base. Each mounting plate has a pair of connecting plates integrally installed at its lower end, and the long plate is fixedly connected to the connecting plate of each mounting plate. Among them, several electric actuators are fixedly installed between a pair of long plates, and the actuating end of the electric actuator is fixedly connected to the linkage plate through a connecting ear; Several nozzle units extend through the space between a pair of long plates, and their upper ends are fixedly connected to the linkage plate.

5. The dust removal device for maintenance shutdown of the aircraft generator production line according to claim 1, characterized in that, When the helical spring does not experience any decrease in its elastic coefficient, the magnetorheological spring is not energized during the operation of the cleaning unit.

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