System for measuring deflection of cantilever long rod piece

Abstract

The utility model discloses a cantilever long rod member deflection measuring system, which is arranged in a detection room and comprises a control cabinet, a support, a monorail crane, a first box staff, a second box staff and a foot stool, the control cabinet, the support, the first box staff and the foot stool are arranged on the ground of the detection room, a lifting platform is mounted on the support, and the monorail crane is mounted on the lifting platform. The lifting platform is provided with a driving device, the driving device is provided with a connecting seat used for installing a to-be-detected blade, the second box staff is used for being installed on a wingtip of the to-be-detected blade, the monorail crane is installed on a roof of the detection room, the monorail crane is provided with a lifting appliance, and the foot stool is arranged on the ground of the detection room. A gradienter is installed on the foot stool, and the control cabinet is in communication connection with the lifting platform, the driving device and the single-rail travelling crane. The device is simple in structure, and the reliability is improved.

Description

Technical Field

[0001] The utility model relates to a system for measuring the deflection of a cantilever long rod. Background Art

[0002] The main function of a helicopter rotor blade is to provide lift as well as pulling and maneuvering force in all directions. The air flow velocity distributed along the direction is different, and during forward flight, the air flow velocity of any section of the rotor blade changes periodically, and it also needs to withstand a large centrifugal force. The aerodynamic conditions and loads it is subject to are very complex.

[0003] The repair of rotor blades is extremely important, and the inspection after repair is an important measure to measure the degree of repair and whether the performance of the blades meets the standards. Since the deflection measurement has not been carried out for a long time, the repair of blades is often based on the on-site operation guidance of senior professional and technical personnel and the confirmation of the repair quality by senior release personnel. No unified and operational standards have been formed as a criterion. First, it reduces production efficiency; second, it wastes the efficiency of senior professional and technical personnel and senior release personnel; third, the experience of professionals requires long-term accumulation and exploration, and it is difficult to train new people; fourth, experience can only be at the manual operation level, which is highly subjective and prone to human errors, and cannot meet the increasingly high requirements for repair quality from the actual combat; fifth, it is not conducive to the development of new testing equipment, the establishment of a database, the collection, entry, long-term preservation of test data, traceability, and the extraction and summary of criteria, so as to realize the automatic identification, calculation, statistical analysis and force deformation and other graphics drawing of the test data in the future, and finally realize the intelligent detection of the repair quality, visual identification, and digitalization. Utility Model Content

[0004] The utility model aims to overcome the shortcomings of the prior art and provide a system for measuring the deflection of a cantilever long rod.

[0005] The purpose of the utility model is achieved through the following technical solutions: a system for measuring the deflection of a cantilevered long rod, which is arranged in an inspection room, the measuring system comprising a control cabinet, a bracket, a monorail carriage, a first tower ruler, a second tower ruler and a tripod, the control cabinet, the bracket, the first tower ruler and the tripod are arranged on the ground of the inspection room, a lifting platform is installed on the bracket, a driving device is installed on the lifting platform, a connecting seat for installing a blade to be measured is provided on the driving device, the second tower ruler is used to be installed on the wing tip of the blade to be measured, the monorail carriage is installed on the roof of the inspection room, a sling is installed on the monorail carriage, the tripod is arranged on the ground of the inspection room, a level meter is installed on the tripod, and the control cabinet is communicatively connected with the lifting platform, the driving device and the monorail carriage respectively.

[0006] Furthermore, the connecting seat comprises a fixed interface and a transfer interface, the transfer interface is detachably mounted on the fixed interface, and the blade to be tested is mounted on the fixed interface or the transfer interface.

[0007] Furthermore, the driving device includes a stepping motor, a worm gear reducer and a blade rotating device, the stepping motor is connected to the worm gear reducer, the worm gear is connected to the blade rotating device, and a connecting seat is provided on the blade rotating device.

[0008] Furthermore, the worm gear reducer is connected to the blade rotating device through a coupling.

[0009] Furthermore, the blade rotating device includes a housing and a main shaft, wherein the main shaft is rotatably mounted on the housing, one end of the main shaft is connected to a worm gear reducer, and the other end of the main shaft is provided with a connecting seat.

[0010] Furthermore, the connecting seat is provided with a scale, and the box body is provided with a scale pointer for indicating the scale on the scale.

[0011] Furthermore, an angle sensor is provided on the main shaft, and the angle sensor is communicatively connected to the control cabinet.

[0012] Furthermore, the level is an automatic level.

[0013] The beneficial effects of the utility model are:

[0014] (1) The utility model uses a stepper motor as an electric actuator and pulse control as a means to achieve millisecond-level time control, drive the blade to rotate to 90°, 270°, and 0° positions for measurement, and the speed can be achieved at several revolutions per minute, protecting the blade from damage during the rotation process;

[0015] (2) The utility model has a simple structure and improved reliability;

[0016] (3) The utility model uses a level to establish a measurement reference plane, which can conveniently and quickly eliminate measurement errors caused by different flatnesses of several different measurement points, while avoiding the construction and maintenance of a fixed ground reference plane, saving project costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the composition of the measurement system in the utility model;

[0018] Figure 2 A schematic diagram of deflection measurement in the utility model;

[0019] Figure 3 A schematic diagram of a driving device in the utility model;

[0020] In the figure, 1-control cabinet, 2-bracket, 3-monorail carriage, 4-first tower ruler, 5-second tower ruler, 6-level, 7-ground, 8-lifting platform, 9-driving device, 91-stepping motor, 92-worm gear reducer, 93-blade rotating device, 94-connecting seat, 95-scale ruler, 96-scale pointer, 10-hanging device, 11-blade to be tested. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 3 The utility model provides a system for measuring the deflection of a cantilever long rod:

[0023] like Figure 1 As shown, a system for measuring the deflection of a cantilevered long rod is arranged in an inspection room, and the floor 7 of the inspection room is horizontal. The measuring system comprises a control cabinet 1, a bracket 2, a monorail trolley 3, a first tower ruler 4, a second tower ruler 5 and a tripod, wherein the control cabinet 1, the bracket 2, the first tower ruler 4 and the tripod are arranged on the floor 7 of the inspection room, a lifting platform 8 is installed on the bracket 2, a driving device 9 is installed on the lifting platform 8, a connecting seat 94 for installing a blade 11 to be tested is provided on the driving device 9, and the second tower ruler 5 is used to be installed on the wing tip of the blade 11 to be tested, the monorail trolley 3 is installed on the roof of the inspection room, a sling 10 is installed on the monorail trolley 3, the tripod is arranged on the floor 7 of the inspection room, a level meter is installed on the tripod, and the control cabinet 1 is respectively connected to the lifting platform 8, the driving device 9 and the monorail trolley 3 for communication.

[0024] In this embodiment, the first tower ruler 4 is used to cooperate with the level 6 to measure the height of the root measurement point of the blade 11 to be measured; the second tower ruler 5 is used to cooperate with the level 6 to measure the height of the wingtip measurement point of the blade 11 to be measured. The height of the root measurement point of the blade 11 to be measured generally does not change, and only needs to be measured once. When the height of the root measurement point of the blade 11 to be measured changes, it needs to be measured again.

[0025] The working principle of the measurement system in this embodiment is as follows: the second scale 5 is fixed by using the threaded holes on the wingtip of the blade 11 to be measured and the wingtip edge line, the blade 11 to be measured is hoisted to the same height as the drive device 9 by using the hoist 10, and then the root of the blade 11 to be measured is installed on the connecting seat 94 of the drive device 9, the transverse axis of the tripod is one meter away from the blade surface of the blade 11 to be measured on the ground 7, and the longitudinal axis of the tripod is in the middle of the root measurement point and the wingtip measurement point of the blade 11 to be measured. Adjust the height of the tripod for observation, for example, adjust the height of the tripod to the chest. After adjusting the tripod to be level, install the level 6 on the tripod, and the level 6 will automatically level and establish a horizontal line. Point the level 6 to the root axis of the blade 11 to be measured, use the high-definition objective lens of the level 6 (such as a 32x high-definition objective lens), and follow the instructions for installing the level 6 to read the front sight scale reading h1 on the first scale 4. Based on this reading, it can be obtained Figure 2 The second height B in the level 6 is pointed to the second tower ruler 5, and the high-definition objective lens of the level 6 is used to read the back sight tower ruler reading h2 from the second tower ruler 5 according to its instructions (after the blade 11 to be measured is hung on the second tower ruler 5, the height of the measuring point on the second tower ruler 5 from the ground 7 is not less than one meter), and the reading can be obtained according to the reading Figure 2 The third height C in the test blade 11 is a fixed value h3 at the root of the axis height, that is, A + B, A is the height of the horizontal plane established by the level, and the height difference D = BC is calculated to obtain the rotor blade disturbance.

[0026] In some embodiments, the connection base 94 includes a fixed interface and a transfer interface, the transfer interface is detachably mounted on the fixed interface, and the blade to be tested 11 is mounted on the fixed interface or the transfer interface. For example, the fixed interface is suitable for mounting a certain type of blade, and if the deflection of other types of blades is to be measured, the corresponding transfer interface can be added to the fixed interface, so that the deflection of various types of blades can be measured.

[0027] like Figure 3 As shown, in some embodiments, the driving device 9 includes a stepping motor 91, a worm gear reducer 92 and a blade rotating device 93, wherein the stepping motor 91 is connected to the worm gear reducer 92, the worm gear is connected to the blade rotating device 93, and a connecting seat 94 is provided on the blade rotating device 93. In this embodiment, under the action of the stepping motor 91, the blade 11 to be tested can be driven to rotate, so that the deflection of the blade 11 to be tested can be measured when it is located at different positions, for example, the deflection of the blade 11 to be tested is measured when it is at 0°, 90° and 270° respectively. For example, the position of the blade 11 to be tested with the back of the blade facing downward and the blade edge facing upward is defined as 0°.

[0028] In some embodiments, the worm gear reducer 92 is connected to the blade rotating device 93 via a coupling.

[0029] In some embodiments, the blade rotating device 93 includes a box and a main shaft, the main shaft is rotatably mounted on the box, one end of the main shaft is connected to the worm gear reducer 92, and the other end of the main shaft is provided with a connecting seat 94. When the main shaft rotates under the action of the stepper motor 91, the connecting seat 94 rotates with the main shaft, thereby driving the blade 11 to be tested to rotate.

[0030] In some embodiments, a scale 95 is disposed on the connection base 94 , and a scale pointer 96 for indicating the scale on the scale 95 is disposed on the box body.

[0031] In some embodiments, an angle sensor is provided on the main shaft, and the angle sensor is in communication connection with the control cabinet 1. The angle sensor can obtain the rotation angle of the blade 11 to be measured by measuring the rotation angle of the main shaft.

[0032] In some embodiments, the level 6 is an automatic level 6. The automatic level 6 can be automatically arranged, and the operation is simple and convenient.

[0033] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A cantilever long rod deflection measurement system, arranged in a testing room, characterized in that: The measuring system includes a control cabinet, a bracket, a monorail carriage, a first tower ruler, a second tower ruler and a tripod. The control cabinet, the bracket, the first tower ruler and the tripod are arranged on the floor of the inspection room. A lifting platform is installed on the bracket, a driving device is installed on the lifting platform, a connecting seat for mounting a blade to be measured is provided on the driving device, the second tower ruler is used to be installed on the wing tip of the blade to be measured, the monorail carriage is installed on the roof of the inspection room, a hoist is installed on the monorail carriage, the tripod is arranged on the floor of the inspection room, a level meter is installed on the tripod, and the control cabinet is communicatively connected with the lifting platform, the driving device and the monorail carriage respectively.

2. A cantilever long rod deflection measurement system according to claim 1, characterized in that: The connecting seat comprises a fixed interface and a transfer interface, the transfer interface is detachably mounted on the fixed interface, and the blade to be tested is mounted on the fixed interface or the transfer interface.

3. A cantilever long rod deflection measurement system according to claim 1, characterized in that: The driving device comprises a stepping motor, a worm gear reducer and a blade rotating device. The stepping motor is connected to the worm gear reducer, the worm gear is connected to the blade rotating device, and a connecting seat is provided on the blade rotating device.

4. A cantilever long rod deflection measurement system according to claim 3, characterized in that: The worm gear reducer is connected to the blade rotating device through a coupling.

5. The system for measuring the deflection of a cantilevered long rod according to claim 3, characterized in that: The blade rotating device comprises a box body and a main shaft. The main shaft is rotatably mounted on the box body. One end of the main shaft is connected to a worm gear reducer, and the other end of the main shaft is provided with a connecting seat.

6. A cantilever long rod deflection measurement system according to claim 5, characterized in that: The connecting seat is provided with a scale, and the box body is provided with a scale pointer for indicating the scale on the scale.

7. A cantilever long rod deflection measurement system according to claim 5, characterized in that: An angle sensor is arranged on the main shaft, and the angle sensor is communicatively connected with the control cabinet.

8. The system for measuring the deflection of a cantilevered long rod according to claim 1, characterized in that: The level is an automatic level.

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