A multi-connected guide vane profile measurement reference platform

Abstract

The present invention belongs to the technical field of blade optical measurement, and specifically relates to a multi-connected guide vane profile measurement reference platform, which includes a measurement box body. Inside the measurement box body, there is a measurement chamber. At the bottom of the measurement chamber, there is a measurement base. Inside the measurement chamber, there are also an optical measurement system and a purification system; according to the different sizes and contours of different workpieces to be measured, the present invention can reasonably arrange the distribution of multiple fixing rods to achieve the limit fixation of different non-standard workpieces. Compared with the existing specially designed special fixtures, this application has a larger scope of application; after completing the limit of the workpiece to be measured, start the pose adjustment component to adjust the positions of the moving seat and the measurement block, start the line laser sensor on the measurement block, calculate and collect the three-dimensional contour information of the workpiece, and perform three-dimensional modeling on the workpiece, compare with the production requirements, calculate the dimensional error of the workpiece processing, improve the quality inspection accuracy of the workpiece, and ensure the qualified rate of the workpiece.

Description

Technical Field

[0001] The present invention belongs to the technical field of blade optical measurement, and specifically relates to a multi-connected guide vane profile measurement reference platform. Background Art

[0002] Guide vanes, as stationary components, are mainly responsible for reducing the rotational kinetic energy of the fluid when it enters the turbine, optimizing the flow line, so as to ensure that the fluid enters the next stage in the best state. They are usually strong and durable, made of metal to adapt to various working conditions.

[0003] Large blade workpieces are often formed by casting. Since they are usually applicable to aero-engines, they have high precision requirements. Therefore, during the production and processing process, it is necessary to perform dimensional measurements multiple times to detect whether each component meets the predetermined dimensions designed, and whether the processed dimensional errors are within the allowable range, strictly controlling the processing precision.

[0004] When it is necessary to measure the profile of a multi-connected guide vane workpiece, the existing technologies mainly adopt the standard template method and the coordinate measuring machine detection method. This contact detection form not only has low detection efficiency and is difficult to meet the needs of mass production, but also has limited detection accuracy and is difficult to meet the production requirements of existing high-precision workpieces. Summary of the Invention

[0005] In order to make up for the deficiencies of the existing technology and solve the above technical problems; the present invention proposes a multi-connected guide vane profile measurement reference platform.

[0006] The technical solution adopted by the present invention to solve its technical problems is: the present invention proposes a multi-connected guide vane profile measurement reference platform, which includes a measurement box body. A measurement chamber is arranged inside the measurement box body. A measurement base is arranged at the bottom of the measurement chamber. An optical measurement system and a purification system are also arranged inside the measurement chamber;

[0007] The optical measurement system includes a measurement block. A line laser sensor is arranged on the measurement block. The measurement block is installed on the moving seat of the pose adjustment component inside the measurement chamber to realize the adjustment of the position and pose of the measurement block inside the measurement chamber;

[0008] The purification system includes a purification fan. The air outlet end of the purification fan communicates with the inside of the measurement chamber, and the air outlet groove at the bottom of the measurement box body communicates with the inside of the measurement chamber;

[0009] Fixing holes are uniformly arranged on the upper bottom surface of the measurement base. Fixing rods are installed inside the fixing holes. An L-shaped limiting rod is arranged at a position close to the bottom of the fixing rod, and the length of the horizontal part of the limiting rod is greater than the distance between adjacent fixing holes.

[0010] Preferably, the output end of the propulsion device on the pose adjustment assembly is connected to the moving seat, and a rotating device is provided at the joint between the moving seat and the output end of the propulsion device. Both the propulsion device and the rotating device are controlled by an external controller;

[0011] An adjustment hole is provided at a position of the end of the measuring block close to the line laser sensor, and the aperture of the adjustment hole is smaller than the aperture of the fixing rod.

[0012] Preferably, the opening of the adjustment hole is conical, and the central axis of the adjustment hole coincides with the central axis of the output end of the rotating device. The distance between the adjustment hole and the line laser sensor is smaller than the distance between the fixing rod and the limiting rod.

[0013] Preferably, a purification chamber is provided in the lower region of the measuring base inside the measuring chamber, and the purification chamber communicates with the air outlet groove;

[0014] The fixing hole is a through hole and communicates with the inside of the purification chamber; both the fixing rod and the limiting rod are tubular structures, and the inside of both the fixing rod and the limiting rod communicates with the inside of the corresponding fixing hole at the installation position. Purification holes are evenly provided on the side walls of the fixing rod and the limiting rod.

[0015] Preferably, a flushing chamber is provided above the line laser sensor inside the measuring block. The flushing chamber communicates with the top of the adjustment hole. Flushing holes are provided around the line laser sensor at the end of the measuring block. The flushing holes are distributed in a ring around the line laser sensor and communicate with the inside of the flushing chamber. A supplementary air hole is also provided on the side wall of the flushing chamber, and a one-way valve is provided inside the supplementary air hole.

[0016] Preferably, an umbrella-shaped protective plate is provided at the bottom of the line laser sensor. The vertical section of the protective plate is an arc-shaped structure, and the vertical projection area of the protective plate is larger than the vertical projection area of the line laser sensor. Pressure alarm sensors are provided at the end of the edge part and the lower surface of the bottom of the protective plate.

[0017] Preferably, the end of the edge part of the protective plate bends upward, and an installation rod is provided in the middle part of the protective plate. The installation rod is slidably inserted into the installation hole provided in the middle part of the line laser sensor, and the installation rod communicates with the inside of the flushing chamber. The end of the installation rod is connected to the inner wall of the flushing chamber through an elastic member.

[0018] Preferably, the installation rod is a tubular structure, and the top opening of the installation rod communicates with the inside of the flushing chamber. Air outlet holes are evenly provided at the bottom of the installation rod, and the air outlet holes are inclined upward and point to the inner surface of the protective plate.

[0019] Preferably, the upper bottom surface of the protection plate is evenly provided with diversion plates, the diversion plates are annularly distributed around the installation rod, and diversion grooves are arranged at the positions of the tops of the diversion plates corresponding to the air outlet holes.

[0020] Preferably, the installation rod is rotatably connected to the protection plate, and a driving motor is arranged at the joint between the installation rod and the protection plate, and the output end of the driving motor is connected to the protection plate.

[0021] The beneficial effects of the present invention are as follows:

[0022] The multi-connected guide vane profile measurement reference platform described in the present invention can reasonably arrange the distribution of multiple fixing rods according to the different sizes and profiles of different workpieces to be measured, so as to realize the limit fixation of different non-standard workpieces. Compared with the existing special fixtures designed separately, this application has a larger scope of application;

[0023] After the workpiece to be measured is limited, start the pose adjustment component to adjust the positions of the moving seat and the measuring block. The line laser sensor on the measuring block releases laser light to contact the surface of the workpiece contour and then receives the reflected laser signal, and sends data such as the reflection angle and propagation time of the optical signal to the analysis software, so as to realize the calculation and acquisition of the three-dimensional contour information of the workpiece, and perform three-dimensional modeling on the workpiece, compare with the production requirements, and calculate the dimensional error of the workpiece processing; if the error is within the allowable range, it is judged as a qualified part, if the machining error of the workpiece exceeds the allowable range, it is judged as an unqualified part, and it needs to be reprocessed in the processing workshop again, which improves the quality inspection accuracy of the workpiece and ensures the qualification rate of the workpiece. Description of the Drawings

[0024] The present invention will be further described below with reference to the drawings.

[0025] Figure 1 is a perspective view of the present invention;

[0026] Figure 2 is a schematic diagram of the interior of the measurement chamber of the present invention;

[0027] Figure 3 is a partial cross-sectional view in the front view direction of the present invention;

[0028] Figure 4 is a schematic diagram of the fixing rod in the present invention for fixing and limiting the workpiece to be measured;

[0029] Figure 5 is a perspective view of the fixing rod in the present invention;

[0030] Figure 6 is a cross-sectional view of the measuring block and the fixing rod in the present invention when they are matched;

[0031] Figure 7Yes Figure 6 Partial enlarged view at position A in the figure;

[0032] Figure 8 Is a three-dimensional view of the protective plate in the present invention.

[0033] In the figure: measuring box body 1, measuring chamber 11, measuring base 12, fixing hole 121, pose adjustment assembly 13, moving seat 131, air outlet groove 14, fixing rod 15, limiting rod 151, purification hole 152, purification chamber 16, measuring block 2, line laser sensor 21, propulsion device 22, adjustment hole 23, flushing chamber 24, flushing hole 241, supplementary air hole 242, protective plate 25, mounting rod 251, mounting hole 252, air outlet hole 253, guide plate 254, guide groove 255. Specific embodiments

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Embodiment 1:

[0036] As shown in the accompanying drawings of the specification Figures 1-8 shown, a multi-connected guide vane profile measurement reference platform includes a measuring box body 1. A measuring chamber 11 is provided inside the measuring box body 1. A measuring base 12 is provided inside the measuring chamber 11. An optical measurement system and a purification system are also provided inside the measuring chamber 11;

[0037] The optical measurement system includes a measuring block 2. A line laser sensor 21 is provided on the measuring block 2. The measuring block 2 is installed on the moving seat 131 of the pose adjustment assembly 13 inside the measuring chamber 11 to realize the adjustment of the position and pose of the measuring block 2 inside the measuring chamber 11;

[0038] The purification system includes a purification fan. The air outlet end of the purification fan communicates with the inside of the measuring chamber 11, and the air outlet groove 14 at the bottom of the measuring box body 1 communicates with the inside of the measuring chamber 11; The purification fan is started regularly to send the purified air from the outside into the measuring chamber 11, and then flows out through the bottom air outlet groove 14 to realize the replacement of the internal air, reducing the adverse effects of external dust and machining debris adhered to the surface of the workpiece to be measured on the measurement process;

[0039] On the upper bottom surface of the measuring base 12, fixing holes 121 are uniformly arranged. Inside the fixing holes 121, fixing rods 15 are installed. At a position near the bottom of the fixing rod 15, an L-shaped limiting rod 151 is arranged, and the length of the horizontal part of the limiting rod 151 is greater than the distance between adjacent fixing holes 121; so that the rotating limiting rod 151 can cover the gap area between adjacent fixing holes 121, and can also play a role in contacting and limiting the part of the workpiece to be measured in the gap area.

[0040] The bottom of the fixing rod 15 is slidably embedded into the fixing hole 121. After the rotation adjustment can be carried out to clamp and fix the workpiece to be measured, then the fixing rod 15 is fixed and limited relative to the fixing hole 121. For the specific fixing method, an electromagnet device can be set at the part where the bottom of the fixing rod 15 is embedded into the fixing hole 121. After the fixing is required, the electromagnet device is started, and the fixing is realized through magnetism. The measuring base 12, which is also a magnetic adsorption device, cooperates to realize the fixing and limiting of the fixing rod 15.

[0041] Specific working process: When the profile of a multi-stage guide vane workpiece needs to be measured, in the prior art, the standard template method and the three-coordinate measuring machine detection method are mainly used. This contact detection form not only has low detection efficiency and is difficult to meet the needs of mass production, but also has limited detection accuracy and is difficult to meet the production requirements of existing high-precision workpieces; therefore, this application uses optical measurement technical means to achieve accurate measurement of the workpiece.

[0042] Specifically, during the measurement process, first open the measurement chamber 11 and place the workpiece to be measured on the measuring base 12. Since the measuring base 12 can select existing magnetic bases and other magnetic adsorption devices, and is internally equipped with an electromagnet device, which can realize magnetic adsorption and fixation of the steel workpiece to be measured after being started, so that the workpiece to be measured is limited and fixed in the vertical direction; then, according to the shape of the workpiece to be measured, a plurality of fixing rods 15 are installed in the corresponding fixing holes 121 close to the contour of the workpiece to be measured. Keep the fixing rods 15 in direct contact with the workpiece to be measured stationary, and rotate and adjust some of the fixing rods 15 that are not in direct contact with the workpiece to be measured so that the vertical parts of the limiting rods 151 arranged side by side on the fixing rods 15 rotate close to the workpiece to be measured and are in close contact with the outer surface of the workpiece to be measured, so that the workpiece to be measured is clamped and fixed from multiple different directions on the outside, ensuring that the workpiece to be measured remains stable during the measurement process, thereby improving the measurement accuracy.

[0043] Since the workpiece to be measured belongs to a multi-connected guide vane, which is composed of multiple blade units, multiple fixing rods 15 can also be installed in the enclosed area between the blade units to limit and fix the multi-connected guide vane from the inside; through the uniformly distributed fixing holes 121, the present application can reasonably arrange the distribution of the multiple fixing rods 15 according to the different sizes and contours of different workpieces to be measured, so as to realize the limit fixation of different non-standard workpieces. Compared with the existing dedicated fixtures designed separately, the present application has a larger applicable range;

[0044] After the workpiece to be measured is limited, start the pose adjustment component 13 to adjust the positions of the moving seat 131 and the measuring block 2. The pose adjustment component 13 includes a moving slide rail and an electric slide table in the prior art, so that the moving seat 131 drives the measuring block 2 to move in the X, Y, and Z axes inside the measuring chamber 11, so that the measuring block 2 approaches the workpiece and adjusts its position around the workpiece to be measured at different positions. At the same time, the line laser sensor 21 on the measuring block 2 emits laser light to contact the surface of the workpiece contour and then receives the reflected laser signal, and sends data such as the reflection angle and propagation time of the optical signal to the analysis software to calculate and collect the three-dimensional contour information of the workpiece, perform three-dimensional modeling on the workpiece, compare with the production requirements, and calculate the dimensional error of the workpiece processing; if the error is within the allowable range, it is judged as a qualified part, and if the processing error of the workpiece exceeds the allowable range, it is judged as an unqualified part, and it needs to be sent back to the processing workshop for reprocessing, which improves the quality inspection accuracy of the workpiece and ensures the qualified rate of the workpiece;

[0045] After the measurement is completed, turn off the magnetic function of the measurement base 12, and the workpiece to be measured can be directly pulled out vertically, and the next workpiece to be measured can be measured. If it belongs to the same batch of workpieces with the same processing size, the distribution limit scheme of the same group of fixing rods 15 can be used. If workpieces of different sizes are replaced, the distribution of the fixing rods 15 can be flexibly adjusted, so as to realize the efficient adaptation to different workpieces to be measured and improve the measurement efficiency.

[0046] Embodiment 2:

[0047] On the basis of Embodiment 1, the output end of the propulsion device 22 on the pose adjustment component 13 is connected to the moving seat 131. Here, the propulsion device 22 can be an electric telescopic rod device, and a rotating device is provided at the joint between the moving seat 131 and the output end of the propulsion device 22. Here, the rotating device can be a motor device, and both the propulsion device 22 and the rotating device are controlled by an external controller; the propulsion device 22 can control the moving seat 131 to drive the measuring block 2 to move in the vertical direction, and the rotating device can control the moving seat 131 to drive the measuring block 2 to rotate horizontally, expanding the pose adjustment range of the measuring block 2, facilitating the pose adjustment of the measuring block 2 to detect the workpiece to be measured, and making the acquisition of the contour information of the workpiece to be measured more complete and efficient;

[0048] An adjustment hole 23 is provided at a position where the end of the measuring block 2 is close to the line laser sensor 21, and the aperture of the adjustment hole 23 is smaller than the aperture of the fixing rod 15;

[0049] The opening of the adjustment hole 23 is conical, and the central axis of the adjustment hole 23 coincides with the central axis of the output end of the rotating device. The distance between the adjustment hole 23 and the line laser sensor 21 is smaller than the distance between the fixing rod 15 and the limiting rod 151.

[0050] Specific working process: On the basis of the specific working process in the first embodiment, in order to facilitate a more comprehensive and accurate measurement of the complex surface contour of the workpiece to be measured, the line laser sensor 21 on the measuring block 2 needs to be close to the surface of the workpiece to be measured for scanning measurement. In order to ensure that the measuring block 2 can move close smoothly while remaining stable and effectively avoiding collisions with the fixing rod 15 and the workpiece; control the measuring block 2 to move to the upper side of the fixing rod 15 where it does not directly contact the workpiece, and then control the adjustment hole 23 on the measuring block 2 to align with the top of the fixing rod 15. Control the propulsion device 22 to start and drive the measuring block 2 to move downward, so that the end of the fixing rod 15 slides into the adjustment hole 23. At this time, the cooperation between the fixing rod 15 and the adjustment hole 23 limits the vertical downward movement process of the measuring block 2, so that the measuring block 2 maintains a stable movement trajectory during the downward movement, and the workpiece to be measured can also be measured during the downward movement;

[0051] When the rotating device starts, it can drive the measuring block 2 to rotate around the central axis of the adjustment hole 23, so as to more flexibly adjust the angle to scan and measure the workpiece to be measured; due to the setting of the distance between the fixing rod 15 and the limiting rod 151, the possibility of damage caused by collisions between the measuring block 2 and the workpiece to be measured or the limiting rod 151 when the measuring block 2 rotates and adjusts the measuring posture can be reduced, and a relatively stable working platform is provided for the normal measurement of the line laser sensor 21;

[0052] Furthermore, in order to facilitate the measurement of the inner wall of the narrow surrounding area between the blade bodies in the workpiece to be measured, control the adjustment hole 23 of the measuring block 2 to cooperate with the fixing rod 15 located in the surrounding area, so that the measuring block 2 can stably move down into the surrounding area and scan and measure the inner wall of the surrounding area. In this way, the scanning and measurement of the workpiece to be measured are more comprehensive and efficient, ensuring the quality of the finished workpiece to be measured.

[0053] Embodiment Three:

[0054] On the basis of Embodiment 2, a purification chamber 16 is provided in the lower side area of the measurement base 12 inside the measurement chamber 11. The purification chamber 16 communicates with the air outlet groove 14. An air outlet fan may be provided inside the purification chamber 16. The intake end of the air outlet fan points to the measurement base 12, and the outlet end communicates with the air outlet groove 14, accelerating the extraction of the air flow inside the measurement chamber 11 into the purification chamber 16 and then guiding it to the outside, realizing the renewal and purification of the air flow inside the measurement chamber 11;

[0055] The fixing hole 121 is a through hole and communicates with the inside of the purification chamber 16; both the fixing rod 15 and the limiting rod 151 are tubular structures, and the inside of both the fixing rod 15 and the limiting rod 151 communicates with the inside of the fixing hole 121. The side wall of the fixing rod 15 is evenly provided with purification holes 152, and the side wall of the vertical part and the top of the horizontal part of the limiting rod 151 are both distributed with purification holes 152;

[0056] A flushing chamber 24 is provided above the line laser sensor 21 inside the measuring block 2. The flushing chamber 24 communicates with the top of the adjustment hole 23, and flushing holes 241 are provided around the line laser sensor 21 at the end of the measuring block 2. The flushing holes 241 are annularly distributed around the line laser sensor 21 and communicate with the inside of the flushing chamber 24.

[0057] Specific working process: On the basis of the specific working process in Embodiment 2, after the workpiece to be measured is processed, measurement and quality inspection are carried out. And when the quality inspection is unqualified, rework is required. Therefore, the detection station and the processing station are relatively close. During the processing of the workpiece, there may be impurities such as unremoved processing debris on the complex surface. After these impurities are brought into the measurement chamber 11, they may affect the normal measurement work of the workpiece to be measured;

[0058] Therefore, a purification fan is provided to send the purified air flow into the measurement chamber 11 after purifying the outside air. The purified air flow flushes each part inside the measurement chamber 11 and the surface of the workpiece, takes away the possible impurity debris and then flows into the lower purification chamber 16 through the fixing hole 121, and finally flows to the outside from the purification chamber 16 through the air outlet groove 14. In this way, the purification of the impurity debris inside the measurement chamber 11 is continuously realized, ensuring the smooth progress of the optical measurement operation of the workpiece to be measured;

[0059] By arranging the fixing hole 121 on the surface of the measurement base 12, it can promote the purified air flow to flow into the fixing hole 121 while concentrating on flushing the workpiece to be measured on the upper side of the measurement base 12, so as to take away the debris impurities that may adhere to the surface of the workpiece to be measured and prevent these debris impurities from affecting the scanning measurement of the complex surface of the workpiece to be measured;

[0060] Furthermore, since both the fixing rod 15 and the limiting rod 151 are tubular structures and are internally communicated with the fixing hole 121, the purification holes 152 on the surfaces of the fixing rod 15 and the limiting rod 151 that play a role in limiting the workpiece to be measured can suck the air in the nearby area and bring it into the purification chamber 16. During this process, the air flow rate in the nearby area is accelerated, so that the surface of the workpiece to be measured nearby is subjected to the air flow scouring effect caused by air extraction, prompting the debris and impurities adhering to the surface of the workpiece to be measured to be sucked into the fixing rod 15 or the limiting rod 151 nearby under the suction effect, making the workpiece to be measured cleaned more thoroughly and able to accept measurement processing in a better state, further improving the measurement accuracy of the workpiece to be measured;

[0061] When adjusting the position of the measuring block 2, the control line laser sensor 21 rotates to the area between the corresponding fixing rod 15 and the limiting rod 151. At this time, the purification holes 152 on the side wall of the fixing rod 15 on one side, the purification holes 152 on the side wall of the vertical part of the limiting rod 151 on the other side, and the purification holes 152 on the horizontal part of the limiting rod 151 at the bottom surround the line laser sensor 21 in the middle. The air flow scouring effect in multiple directions fully cleans the surface of the line laser sensor 21, ensuring the normal operation of the line laser sensor 21;

[0062] Furthermore, during the downward movement of the measuring block 2, the end of the fixing rod 15 slides and is embedded into the adjustment hole 23, so that the air inside the adjustment hole 23 is squeezed and flows into the scouring chamber 24, and then flows out from the scouring holes 241 around the line laser sensor 21 at the end of the measuring block 2. After the flowing air scours the surface of the line laser sensor 21, it is sucked in by the purification holes 152 on the surrounding fixing rod 15 and limiting rod 151 nearby, realizing full scouring and cleaning of the surface of the line laser sensor 21, and further ensuring the normal operation of the line laser sensor 21;

[0063] And a supplementary air hole 242 is also provided on the side wall of the scouring chamber 24. A one-way valve is provided inside the supplementary air hole 242, and a filter screen is provided at the outer opening; during the upward movement and reset of the measuring block 2, the negative pressure in the scouring chamber 24 prompts the outside air to flow out into the scouring chamber 24 through the supplementary air hole 242, and the setting of the one-way valve prevents the internal air from flowing from the supplementary air hole 242 to the outside, ensuring the scouring and cleaning effect of the air released from the scouring holes 241 on the line laser sensor 21;

[0064] And a micro air pump device can be provided inside the scouring chamber 24. The intake end of the micro air pump device is communicated with the supplementary air hole 242, and the outlet end is communicated with the inside of the scouring chamber 24. After starting, it can continuously draw in air from the outside and supplement it into the scouring chamber 24. Due to the blocking effect of the end of the fixing rod 15 on the adjustment hole 23, the air flow can only flow out along the communicating scouring holes 241, forming a continuous scouring air flow acting on the surface of the line laser sensor 21 and improving the purification and cleaning effect.

[0065] Example 4:

[0066] On the basis of Example 3, an umbrella-shaped protective plate 25 is provided at the bottom of the line laser sensor 21. The cross-section of the protective plate 25 is an arc-shaped structure, and the vertical projection area of the protective plate 25 is larger than the vertical projection area of the line laser sensor 21. Pressure alarm sensors are evenly arranged at the edge ends of the protective plate 25;

[0067] The edge ends of the protective plate 25 are bent upward, and a mounting rod 251 is provided in the middle of the protective plate 25. The mounting hole 252 is slidably inserted into the mounting hole 252 provided in the middle of the line laser sensor 21, and the mounting rod 251 extends upward into the flushing chamber 24. The end of the mounting rod 251 is connected to the inner wall of the flushing chamber 24 through an elastic member. Here, the elastic member can be a spring.

[0068] Specific working process: On the basis of the specific working process in Example 3, as the position of the measuring block 2 is adjusted, in order to ensure the safety of the line laser sensor 21 on the measuring block 2, an umbrella-shaped protective plate 25 is provided at the bottom of the rod-shaped line laser sensor 21, and the edge ends of the protective plate 25 extend outward. In this way, before the bottom of the line laser sensor 21 collides with other components due to an operation error during the downward movement of the measuring block 2, first, the bottom protective plate 25 is hit before the line laser sensor 21, triggering the pressure alarm sensor therein and sending out an alarm signal. While stopping the continued downward movement, the protective plate 25 is pressed to drive the mounting rod 251 to pull the elastic member to deform along the mounting hole 252, buffer the impact and then reset; Similarly, during the horizontal movement, it is also the edge ends of the protective plate 25 that collide before the line laser sensor 21. The edge ends of the protective plate 25 are made of elastic material, so as to reduce the damage caused to the line laser sensor 21 and the protective plate 25 due to the impact and ensure the normal progress of the measurement operation;

[0069] And the edge part of the protective plate 25 is bent upward. After the air flow flowing out from the flushing hole 241 contacts the upper surface of the protective plate 25, the flow is blocked and then flows upward along the arc surface of the protective plate 25, and then reversely flushes the surface of the line laser sensor 21 again, and impacts with the downward flowing air flow. The air flow oscillation effect promotes the impurities that may adhere to the surface of the line laser sensor 21 to fall off, and is sucked in under the air extraction action of the surrounding purification holes 152, realizing the full purification of the line laser sensor 21.

[0070] Example 5:

[0071] On the basis of Embodiment 4, the mounting rod 251 is of a tubular structure, and the top opening of the mounting rod 251 communicates with the inside of the flushing chamber 24. The bottom of the mounting rod 251 is evenly provided with air outlet holes 253, and the air outlet holes 253 are inclined upward and point to the inner surface of the protection plate 25;

[0072] The upper bottom surface of the protection plate 25 is evenly provided with guide plates 254, and the parts of the tops of the guide plates 254 corresponding to the air outlet holes 253 are provided with guide grooves 255;

[0073] The mounting rod 251 and the protection plate 25 are rotatably connected, and a driving motor is arranged at the joint between the mounting rod 251 and the protection plate 25. The output end of the driving motor is connected to the protection plate 25, and the driving motor is controlled by an external controller.

[0074] Specific working process: On the basis of the specific working process in Embodiment 4, since the mounting rod 251 communicates with the flushing chamber 24, part of the air flow flowing into the inside of the flushing chamber 24 impacts the mounting rod 251 to make it slide vertically, and at the same time, it flows along the inside of the tubular mounting rod 251 and laterally flows out from the air outlet holes 253 provided at the bottom of the mounting rod 251, and flushes the surface of the line laser sensor 21 from the lower side along the guide grooves 255 on the guide plates 254; At the same time, it is also possible to start the driving motor to drive the protection plate 25 to rotate relative to the mounting rod 251. The rotating protection plate 25 drives the upper guide plates 254 to rotate, stirs the air in the nearby area, and cooperates with the air flow with an upward flow trend released from the air outlet holes 253 to enhance the intensity of its upward impact and increase the coverage range of its upward flow, so that the flushing effect on the surface of the line laser sensor 21 is more sufficient.

[0075] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-link guide blade profile measurement reference platform, comprising a measurement box, a measurement chamber is arranged inside the measurement box, a measurement base is arranged at the bottom of the measurement chamber, an optical measurement system and a purification system are also arranged inside the measurement chamber, and the characteristics are: The optical measurement system includes a measuring block, on which a wired laser sensor is arranged. The measuring block is mounted on a movable seat of a position and posture adjustment component in the measuring room to adjust the position and posture of the measuring block in the measuring room. The purification system includes a purification fan, the air outlet end of the purification fan is connected to the inside of the measuring chamber, and the air outlet slot at the bottom of the measuring box is connected to the inside of the measuring chamber; The bottom surface of the measuring base is evenly provided with fixing holes, and fixing rods are installed inside the fixing holes. An L-shaped limiting rod is provided near the bottom of the fixing rod, and the length of the horizontal part of the limiting rod is greater than the spacing between adjacent fixing holes; The output end of the propulsion device on the posture adjustment component is connected to the moving seat, and a rotating device is provided at the joint between the moving seat and the output end of the propulsion device, and both the propulsion device and the rotating device are controlled by an external controller; An adjustment hole is provided at the end of the measuring block near the line laser sensor, and the aperture of the adjustment hole is smaller than the aperture of the fixing rod; A purification chamber is provided in the measuring chamber at the lower side of the measuring base, and the purification chamber is communicated with the gas outlet groove; The fixing hole is a through hole and communicates with the inside of the purification chamber; the fixing rod and the limiting rod are both tubular structures, and the inside of the fixing rod and the limiting rod are communicated with the inside of the fixing hole at the corresponding installation position, and the side walls of the fixing rod and the limiting rod are evenly provided with purification holes; the side walls of the vertical part of the limiting rod and the top of the horizontal part are distributed with purification holes; A flushing cavity is arranged inside the measuring block on the upper side of the line laser sensor, the flushing cavity is communicated with the top of the adjustment hole, and flushing holes are arranged in a ring around the end of the measuring block around the line laser sensor, and the flushing holes are communicated with the inside of the flushing cavity.

2. A multi-joint guide blade profile measurement reference platform according to claim 1, characterized in that: The opening of the adjustment hole is conical, and the central axis of the adjustment hole coincides with the central axis of the output end of the rotating device. The distance between the adjustment hole and the line laser sensor is smaller than the distance between the fixing rod and the limiting rod.

3. A multi-link guide blade profile measurement reference platform according to claim 2, characterized in that: The side wall of the flushing cavity is also provided with a supplementary air hole, and a one-way valve is arranged inside the supplementary air hole.

4. A multi-joint guide blade profile measurement reference platform according to claim 3, characterized in that: An umbrella-shaped protective plate is arranged at the bottom of the line laser sensor. The vertical cross-section of the protective plate is an arc-shaped structure, and the vertical projection area of ​​the protective plate is larger than the vertical projection area of ​​the line laser sensor. Pressure alarm sensors are arranged at the edge ends of the protective plate and the lower surface of the bottom.

5. A multi-joint guide blade profile measurement reference platform according to claim 4, characterized in that: The end of the edge of the protective plate is bent upward, and a mounting rod is set in the middle of the protective plate. The mounting rod is slidably embedded in the mounting hole set in the middle of the line laser sensor, and the mounting rod is connected to the inside of the flushing cavity. The end of the mounting rod is connected to the inner wall of the flushing cavity through an elastic member.

6. A multi-joint guide blade profile measurement reference platform according to claim 5, characterized in that: The mounting rod is a tubular structure, and the top opening of the mounting rod is communicated with the inside of the flushing chamber. The bottom of the mounting rod is evenly provided with air outlet holes, which are inclined upward and point to the inner surface of the protective plate.

7. A multi-link guide blade profile measurement reference platform according to claim 6, characterized in that: Guide plates are evenly arranged on the bottom surface of the protective plate, and the guide plates are distributed in a ring shape around the mounting rod. A guide groove is arranged at the position of the top of the guide plate corresponding to the air outlet.

8. The multi-link guide blade profile measurement reference platform according to claim 7, characterized in that: The mounting rod and the protection plate are rotationally connected, and a driving motor is arranged at the joint between the mounting rod and the protection plate, and the output end of the driving motor is connected to the protection plate.

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