Measuring and positioning device for steam turbine installation

Abstract

The invention discloses a measuring and positioning device for steam turbine installation. The measuring and positioning device comprises rotors. The laser emitting assembly is arranged on the rotor in the generator area and comprises a laser generator; laser receiving assemblies are arranged on the rotors in the high-pressure cylinder area, the medium-pressure cylinder area and the low-pressure cylinder area, and each laser receiving assembly comprises coated glass; a centering hole is formed in the center of the coated glass; the device further comprises an upper fixing assembly arranged below the laser emitting assembly and the laser receiving assembly, a solid supporting arm and a hollow supporting arm which can be lengthened are matched to lift the laser generator and the coated glass to the outer side of the largest blade, and therefore laser beams can cross obstacles to be received by the coated glass. Therefore, shafting calibration can be carried out on the solid rotor by utilizing laser, then installation is completed, and the shafting calibration device is simple in structure, low in manufacturing cost and capable of being widely applied to various application scenes of shafting calibration and positioning installation.

Description

Technical Field

[0001] The present invention relates to the technical field of steam turbine installation, and in particular to a measuring and positioning device for steam turbine installation. Background Art

[0002] A steam turbine is a mechanical device that converts the thermal energy of steam into rotational mechanical energy. It is a core component of modern thermal power plants, nuclear power plants, large ships, and certain industrial drive systems. Its cylinders are divided into high-pressure, intermediate-pressure, and low-pressure cylinders, following the steam flow sequence, to withstand varying pressures and temperatures. Inside each cylinder, moving blades are secured by rotors and rotor discs. These blades directly absorb the steam's impact and drive the rotor's rotation, converting thermal energy into rotational mechanical energy.

[0003] In a steam turbine generator set, multiple rotors, such as a high-pressure rotor, an intermediate-pressure rotor, a low-pressure rotor, and a generator rotor, are usually connected into a long shaft system through couplings. By aligning the rotors, a series of problems such as bearing damage, coupling damage, rotor damage, energy loss, and abnormal vibration can be avoided.

[0004] Patent CN209116978U discloses a center calibration device for turbine installation. It emits a laser beam through a laser transmitter, and then adjusts the height of the mounting base to move the laser beam to be collinear with the turbine installation center line. The laser receiving sensor then receives the laser beam and cooperates with a single-chip microcomputer to determine whether the turbine is accurately installed, thereby achieving the calibration purpose.

[0005] In the technical solution of the aforementioned patent, the laser beam emitted by the laser transmitter must pass through the turbine's shafting to be detected by the laser receiving sensor. Therefore, the turbine rotor must be hollow. However, in actual applications, steam turbine rotors are generally solid, offering higher torque transmission and durability. However, the laser beam cannot pass through solid rotors and blades to be received by the laser receiving sensor. Therefore, it is impossible to measure and locate the shafting installation of steam turbines with solid rotors, which presents certain limitations. Summary of the Invention

[0006] The purpose of the present invention is to provide a measuring and positioning device for turbine installation, so as to solve the technical problem in the prior art that the laser beam cannot penetrate the solid rotor and blades, resulting in the inability to perform shaft centering measurement and positioning installation on the turbine with a solid rotor.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A measuring and positioning device for steam turbine installation, comprising various rotors; a laser emitting assembly is provided on the rotor located in the generator area, the laser emitting assembly including a laser generator; laser receiving assemblies are provided on the rotors located in the high-pressure cylinder area, the medium-pressure cylinder area and the low-pressure cylinder area, the laser receiving assembly including coated glass; a centering hole is provided in the center of the coated glass; an upper fixing assembly is provided below the laser emitting assembly and the laser receiving assembly, and a lower fixing assembly connected to the upper fixing assembly; an adjustment assembly is provided between the upper fixing assembly and the laser emitting assembly, and between the upper fixing assembly and the laser receiving assembly, the adjustment assembly including a hollow support arm; a solid support arm is inserted into the hollow support arm.

[0009] Preferably, the laser emitting assembly further comprises a mounting block; a clamp is fixedly connected to the upper portion of the mounting block; and the laser generator is arranged inside the clamp.

[0010] Preferably, the laser receiving assembly also includes a rectangular rod, which is inserted into the upper end of a solid support arm located in the high-pressure cylinder area, the medium-pressure cylinder area or the low-pressure cylinder area; a circular frame is fixed to the upper end of the rectangular rod; coated glass is embedded inside the frame to reduce the brightness of the laser beam; a centering hole is opened in the coated glass, and the size of the centering hole is equal to the diameter of the laser beam.

[0011] Preferably, the upper fixed assembly includes an upper fixed block; the lower fixed assembly includes a lower fixed block; the upper fixed block and the lower fixed block together constitute a regular hexagonal structure, wherein the lower part of the upper fixed block is a notch-shaped structure with one side missing, and the notch has the same shape as the lower fixed block, and the rotor in each cylinder area is sleeved in the inner center of the regular hexagonal structure.

[0012] Preferably, the upper fixing assembly also includes a nut seat fixed to the centers of the four sides of the upper fixing block; the nut seat is internally threaded with a screw, the inner end of the screw penetrates the upper fixing block and abuts against the rotor; a rubber pad is provided at the inner end of the screw.

[0013] Preferably, the lower fixing assembly further comprises a transparent hollow tube fixedly connected to the lower surface of the lower fixing block; a sliding rod is slidably connected inside the hollow tube; and a first scale is provided on the outer surface of the sliding rod along the length direction.

[0014] Preferably, a sliding cavity is provided inside the sliding rod; a sliding block is provided on the lower end surface of the hollow tube; and a spring is provided between the upper end of the sliding cavity and the sliding block.

[0015] Preferably, the adjustment assembly also includes a flat portion axially opened on the upper side of the solid support arm; the upper part of the hollow support arm is threadedly connected with a second butterfly-shaped top screw; a second scale is opened on the flat portion of the solid support arm; a digital level is connected to the hollow support arm via a tubular sleeve; the digital level is fixed to a relative position on the hollow support arm through the first butterfly-shaped top screw and the sleeve.

[0016] Preferably, the laser generator emits a laser beam to irradiate the coated glass on each rotor in turn. If the laser beam penetrates the coated glass located in the high-pressure cylinder area with high brightness, it indicates that the centering of the turbine shaft system is completed. If the laser beam gradually penetrates the coated glass located in the low-pressure cylinder area, the medium-pressure cylinder area and the high-pressure cylinder area in turn with low brightness, it indicates that there is a deviation in the turbine shaft system and each rotor needs to be fine-tuned.

[0017] Preferably, a laser beam is emitted by a laser generator to illuminate the coated glass, so that the brightness of the laser beam decays when it penetrates the coated glass in each cylinder area in turn. If the brightness of the laser beam inside each cylinder area is different, it means that the laser beam is completely illuminated on the coated glass inside each cylinder area, and the central axis of each rotor is relatively accurate, but not completely aligned. At this time, the rotor position of the high-pressure area can be fine-tuned according to the rotor position of the low-pressure area until the laser beam appears as a straight line with the highest brightness. At this time, it is considered that the rotors inside each cylinder area are aligned.

[0018] Beneficial effects of the present invention:

[0019] 1. The present invention uses a solid support arm with an extendable height and a hollow support arm to lift the laser generator and coated glass to the outside of the largest blade, so that the laser beam can pass through the obstacle and be received by the coated glass. In this way, the laser can be used to calibrate the shaft system of the solid rotor and then complete the installation. It has a simple structure and low cost, and can be widely used in various application scenarios of shaft system calibration and positioning installation.

[0020] 2. By observing the changes in the brightness of the laser beam, the present invention can accurately know which rotor position in each cylinder area has shifted, assisting installers to accurately adjust the rotor that has shifted, making the shaft centering process more convenient and shortening the construction period.

[0021] 3. According to the present invention, the installer can observe and measure the offset angle and offset distance of the rotor based on the relative position of the laser beam and the centering hole, thereby assisting the installer to make corresponding adjustments to the offset rotor position with higher adjustment accuracy.

[0022] 4. The present invention observes the first scale on the slide rod through a hollow tube made of transparent material, thereby knowing the distance between the rotor and the edge of the lower fixed block. This facilitates the use of the steam turbine in the future. If the shaft position deviates, the hand wheel can be quickly rotated during maintenance without the need for additional trial and error calibration, making maintenance more convenient.

[0023] 5. In the present invention, since the regular hexagonal structures formed by the upper and lower fixed blocks on each rotor are of the same size, when each rotor is located at the center of the regular hexagonal structure, the height position of the hollow support arms fixed on the upper fixed blocks are all the same, and there is no need to adjust due to the different sizes of the rotors, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 is a cross-sectional view of the present invention;

[0027] Figure 3 It is a schematic structural diagram of the laser emission assembly in the present invention;

[0028] Figure 4 It is a structural schematic diagram of the laser receiving assembly in the present invention;

[0029] Figure 5 is a cross-sectional view of the lower fixing assembly of the present invention;

[0030] In the picture:

[0031] 1. Upper fixing assembly; 101. Upper fixing block; 102. Nut seat; 103. Screw; 104. Rubber pad; 105. Handwheel;

[0032] 2. Lower fixing assembly; 201. Lower fixing block; 202. Hollow tube; 203. Sliding rod; 204. First scale; 205. Sliding cavity; 206. Sliding block; 207. Spring; 208. Recess;

[0033] 3. Adjustment assembly; 301. Hollow support arm; 302. Solid support arm; 303. Sliding sleeve; 304. First butterfly screw; 305. Digital level; 306. Flat surface; 307. Second scale; 308. Second butterfly screw;

[0034] 4. Laser emission assembly; 401. Clamp; 402. Butterfly bolt; 403. Laser generator; 404. Mounting block;

[0035] 5. Laser receiving assembly; 501. Frame; 502. Rectangular rod; 503. Coated glass; 504. Centering hole;

[0036] 6. Rotor. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] See also Figure 1-Figure 2 As shown, a measuring and positioning device for steam turbine installation includes rotors 6 located in the high-pressure cylinder area, the medium-pressure cylinder area, the low-pressure cylinder area and the generator area; a laser emitting component 4 is provided on the rotor 6 located in the generator area, and a laser receiving component 5 is provided on the rotors 6 located in the high-pressure cylinder area, the medium-pressure cylinder area and the low-pressure cylinder area. The laser beam (visible beam) is calibrated and coordinated by the laser emitting component 4 and the laser receiving component 5 to achieve calibration and centering of the rotors 6 located in the high-pressure cylinder area, the medium-pressure cylinder area, the low-pressure cylinder area and the generator area.

[0039] Please refer again Figure 3-Figure 4 As shown, a measuring and positioning device for turbine installation also includes an upper fixing component 1 arranged below the laser emitting component 4 and the laser receiving component 5, and a lower fixing component 2 connected to the upper fixing component 1. The upper fixing component 1 and the lower fixing component 2 cooperate with each other to fix the laser emitting component 4 and the laser receiving component 5 on the corresponding rotor 6.

[0040] Please refer again Figure 3-Figure 4 As shown, an adjustment component 3 is provided between the upper fixing component 1 and the laser emitting component 4 , and between the upper fixing component 1 and the laser receiving component 5 . The adjustment component 3 is used to adjust the height of the laser emitting component 4 and the laser receiving component 5 .

[0041] Please refer again Figure 3 As shown, the upper fixing assembly 1 includes an upper fixing block 101; the lower fixing assembly 2 includes a lower fixing block 201; the upper fixing block 101 and the lower fixing block 201 together constitute a regular hexagonal structure, wherein the lower portion of the upper fixing block 101 is a notch-shaped structure with one side missing, and the notch is the same shape as the lower fixing block 201, and is clamped by a dovetail groove. The rotor 6 in each cylinder area is sleeved on the inner center of the regular hexagonal structure formed by the upper fixing block 101 and the lower fixing block 201.

[0042] Please refer again Figure 3As shown, in order to enable the rotor 6 in each cylinder area to be sleeved on the inner center of the regular hexagonal structure formed by the upper fixed block 101 and the lower fixed block 201, the centers of the four sides of the upper fixed block 101 are fixed with nut seats 102; the inner thread of the nut seat 102 is connected to the screw rod 103, and the inner end of the screw rod 103 penetrates the upper fixed block 101 and abuts against the rotor 6. By adjusting the same parameters (the number of revolutions of the screw rod 103) of the four screw rods 103, the rotor 6 is placed in the inner center of the regular hexagonal structure formed by the upper fixed block 101 and the lower fixed block 201. Furthermore, a rubber pad 104 is provided on the inner end of the screw rod 103. When the rubber pad 104 contacts the rotor 6, it deforms into a concave shape, thereby perfectly fitting and ensuring that the laser emitting assembly 4 is stably fixed on the rotor 6. Furthermore, the outer ends of the screw rods 103 are fixedly connected with hand wheels 105 , which assist the operator in rotating the screw rods 103 to fix the positions of the upper fixing block 101 and the lower fixing block 201 .

[0043] Please refer again Figure 3-Figure 5 As shown, the lower fixed assembly 2 also includes a hollow tube 202 of transparent material, specifically acrylic, fixedly connected to the lower surface of the lower fixed block 201. A slide rod 203 is slidably connected to the interior of the hollow tube 202, the upper end of which abuts the rotor 6. The outer surface of the slide rod 203 is provided with a first scale 204 along its length, which is used to measure the distance between the rotor 6 and each side of the regular hexagon formed by the upper fixed block 101 and the lower fixed block 201. A sliding cavity 205 is defined within the slide rod 203. The lower end surface of the hollow tube 202 is presumably provided with a sliding block 206, the shape of which matches the sliding cavity 205. A spring 207 is provided between the upper end of the sliding cavity 205 and the sliding block 206. The spring 207 is used to push the slide rod 203 into contact with the rotor 6. Furthermore, the outer surface of the lower portion of the slide bar 203 is provided with symmetrically arranged recesses 208 , which facilitate the operator to pinch the slide bar 203 and slide it downward, thereby installing the upper and lower fixing components 2 .

[0044] Please refer again Figure 3-Figure 4As shown, the adjustment assembly 3 includes a hollow support arm 301, which is fixed to the upper edge of the upper fixed block 101 to achieve the connection between the adjustment assembly 3 and the upper fixed assembly 1; a solid support arm 302 is inserted into the hollow support arm 301; a flat portion 306 is axially provided on the upper side of the solid support arm 302; a second butterfly-shaped set screw 308 is threadedly connected to the upper part of the hollow support arm 301, and the inner end of the second butterfly-shaped set screw 308 abuts against the flat portion 306 of the solid support arm 302 to fix the relative position between the hollow support arm 301 and the solid support arm 302. Furthermore, a second scale 307 is provided on the flat portion 306 of the solid support arm 302, which can assist the operator in accurately adjusting the relative position between the hollow support arm 301 and the solid support arm 302. A digital level 305 is connected to the hollow support arm 301 via a tubular sleeve 303. The digital level 305 is fixed to a relative position on the hollow support arm 301 through a first butterfly-shaped top screw 304 and the sleeve 303. The digital level 305 is used to assist the operator in observing whether the adjustment is perpendicular to the horizontal plane, thereby ensuring that the solid support arm 302 is upright on the rotor 6.

[0045] Please refer again Figure 3 As shown, the laser emitting assembly 4 includes a mounting block 404, which is inserted into the upper end of the solid support arm 302 located in the generator area, thereby realizing the connection between the laser emitting assembly 4 and the adjustment assembly 3; a clamp 401 is fixedly connected to the upper part of the mounting block 404; a laser generator 403 is arranged on the inner side of the clamp 401, and its laser wavelength is 532nm and the power is 3-5mW. It can be noted that the laser beam is clearer in environments such as dust, fog, water mist or smoke; the clamp 401 is tightened by a butterfly bolt 402 to complete the fixation of the laser generator 403.

[0046] Please refer again Figure 4 As shown, the laser receiving assembly 5 includes a rectangular rod 502, which is inserted into the upper end of the solid support arm 302 located in the high-pressure cylinder area, the medium-pressure cylinder area or the low-pressure cylinder area, so as to realize the connection between the laser receiving assembly 5 and the adjustment assembly 3; a circular frame 501 is fixed to the upper end of the rectangular rod 502; a coated glass 503 (which can be a neutral density filter, an absorbing coated glass 503, etc.) is embedded in the frame 501 to reduce the brightness of the laser beam; a centering hole 504 is opened in the center of the coated glass 503, and the size of the centering hole 504 is equal to the diameter of the laser beam.

[0047] To facilitate understanding of the above technical solution of the present invention, the working principle or operation method of measuring and positioning for steam turbine installation in the actual process of the present invention is described in detail below:

[0048] S100: First, the rotors 6 of the high-pressure cylinder area, the medium-pressure cylinder area, the low-pressure cylinder area, and the generator area are placed to roughly aligned positions.

[0049] S200: Fix multiple sets of upper fixing components 1 in conjunction with lower fixing components 2 on rotors 6 of different specifications in the high-pressure cylinder area, the medium-pressure cylinder area, the low-pressure cylinder area and the generator area respectively.

[0050] S300: Adjust the height positions of the upper ends of the adjustment components 3 above each upper fixing component 1 to be on a horizontal line.

[0051] S400: First install the laser emitting component 4 on the upper part of the regulating component 3 in the generator area, and then install the laser receiving component on the rotor 6 in the low-pressure cylinder area, the medium-pressure cylinder area and the high-pressure cylinder area in sequence.

[0052] S500: Turn on the laser emitting component 4, so that the laser emitting component 4 emits a laser beam, and irradiates the laser receiving component 5 on each rotor 6 in turn. If the laser beam penetrates the laser receiving component 5 located in the high-pressure cylinder area with high brightness, it means that the turbine shaft system is centered and can be installed. If the laser beam gradually penetrates the laser receiving components 5 located in the low-pressure cylinder area, the medium-pressure cylinder area and the high-pressure cylinder area in turn with low brightness, it indicates that the turbine shaft system is misaligned and each rotor 6 needs to be fine-tuned.

[0053] In step S100 , the operator uses a crane to fix each rotor 6 and the blades on the rotor 6 inside each cylinder body, and through visual observation by the operator, roughly adjusts the rotor 6 in each area to a horizontal straight line.

[0054] In step S200, the steps can be specifically divided into the following steps:

[0055] A100: Rotate the four hand wheels 105 to rotate the inner ends of the screw rods 103 outward until the distance between the ends of the diagonally opposite screw rods 103 is greater than the diameter of the rotor 6.

[0056] A200: Since the upper fixing block 101 and the lower fixing block 201 are connected by a dovetail groove, the lower fixing block 201 can be removed from the upper fixing block 101 when installing the upper and lower fixing components 2, and then the upper fixing block 101 can be put on the rotor 6 from top to bottom through the notch on it; at this time, pinch the recessed portion 208 at the lower end of the slide bar 203 and slide it downward, and then re-install the lower fixing block 201 on the upper fixing block 101, and the rotor 6 can be put inside the regular hexagonal structure formed by the upper fixing block 101 and the lower fixing block 201.

[0057] It is worth noting here that: when the installer pinches the recess 208 at the lower end of the slide bar 203 and slides it downward, and re-installs the lower fixing block 201 on the upper fixing block 101, the force applied to the recess 208 can be released. Under the action of the spring 207, the slide bar 203 approaches and abuts against the surface of the rotor 6 in the hollow tube 202. At this time, the first scale 204 on the slide bar 203 can be observed through the hollow tube 202 made of transparent material to know the distance between the rotor 6 and the edge of the lower fixing block 201. This is convenient for later use of the turbine. If the shaft position deviates, the hand wheel 105 can be quickly rotated during maintenance without the need for additional trial and error calibration, making maintenance more convenient.

[0058] A400: Rotate and adjust the four hand wheels 105 diagonally to drive the rubber pad 104 at the inner end of the screw 103 to rotate toward the surface of the rotor 6 until it abuts. When the four hand wheels 105 rotate the same number of revolutions and the rubber pads 104 at the inner ends of all the screws 103 are firmly pressed against the rotor 6, the rotor 6 is firmly fixed in the center of the regular hexagonal structure formed by the upper fixing block 101 and the lower fixing block 201 in a sleeved manner.

[0059] It is worth noting here that: since the regular hexagonal structure formed by the upper fixing block 101 and the lower fixing block 201 on each rotor 6 is the same size, when each rotor 6 is located at the center of the regular hexagonal structure, the height position of the hollow support arm 301 fixed on the upper fixing block 101 is the same, and there is no need to adjust due to the different sizes of the rotors 6, which is convenient to use.

[0060] In step S300, the second butterfly screw 308 is loosened outward to release the tight contact between the second butterfly screw 308 and the solid support arm 302. The solid support arm 302 is then slid upward within the hollow support arm 301 until the upper end of the solid support arm 302 is higher than the height of the blade with the largest diameter in each cylinder area. The second butterfly screw 308 is then re-tightened against the solid support arm 302. At this time, the position of the second scale 307 is observed to help adjust the relative position of the solid support arm 302 and the hollow support arm 301 in each subsequent cylinder area so that the total length of the solid support arm 302 and the hollow support arm 301 in each cylinder area after adjustment is the same. In addition, the digital level 305 is used to assist the operator in adjusting the angle of the solid support arm 302 to ensure that it is perpendicular to the horizontal plane.

[0061] It is worth noting here that: since a flat portion 306 is provided on the solid support arm 302, it can not only help the second butterfly-shaped top screw 308 to press against the solid support arm 302 to complete the relative position fixation between the solid support arm 302 and the hollow support arm 301, but also help the first butterfly-shaped top screw 304 to press against the solid support arm 302, thereby completing the relative position fixation between the digital level 305 and the solid support arm 302.

[0062] In step S400, the specific steps include first inserting the mounting block 404 into the upper end of the solid support arm 302 inside the generator area, then securing the laser generator 403 to the mounting block 404 using the clamp 401 and butterfly bolt 402, with the laser emitting end of the laser generator 403 facing the high-pressure cylinder area. Then, rectangular rods 502 are sequentially inserted into the upper ends of the solid support arms 302 located in the low-pressure, medium-pressure, and high-pressure cylinder areas, allowing the laser beam to illuminate the interior of each frame 501.

[0063] It is worth noting here that the specifications of the laser emitting component 4 and each laser receiving component 5 match each other, that is, after the mounting block 404 and the rectangular insertion rod 502 are respectively inserted into the upper end of the solid support arm 302, the distance between the height of the laser beam of the laser generator 403 and the upper end surface of the solid support arm 302 is equal to the distance between the height of the centering hole 504 and the upper end surface of the solid support arm 302.

[0064] In step 500, a laser beam is emitted by the laser generator 403, irradiating the coated glass 503. Because the coated glass 503 has a uniform layer of metal oxide, such as chromium, nickel, or stainless steel, it absorbs the laser beam proportionally without changing the laser beam's transmission angle. This causes the laser beam's brightness to attenuate as it sequentially penetrates the coated glass 503 within each cylinder region. Therefore, if the laser beam's brightness within each cylinder region varies as it travels from the generator region toward the high-pressure cylinder region, this indicates that the laser beam has fully irradiated the coated glass 503 within each cylinder region, and the central axes of the rotors 6 are relatively aligned, but not completely aligned. In this case, the position of the rotor 6 in the high-pressure region can be fine-tuned based on the position of the rotor 6 in the low-pressure region (this is determined by the cylinder volume, i.e., the high-pressure cylinder region has a smaller volume than the low-pressure region) until the laser beam appears as a straight line with the highest brightness. At this point, the rotors 6 within each cylinder region are considered fully aligned, and subsequent installation steps can proceed.

[0065] Furthermore, by observing the brightness of the laser beam inside each cylinder area, if the brightness of the laser beam inside two or three consecutive cylinder areas is consistent, it indicates that there is a deviation in the position of the rotor 6 in these cylinder areas, which can remind the installer to accurately fine-tune the position of the rotor 6 that has shifted.

[0066] It is worth noting here that when the laser beam is irradiated from the generator area to the high-pressure cylinder area, two situations may occur, resulting in the appearance of the brightest laser beam. One is that the laser beam is aligned with the centering hole 504 in the center of all the coated glasses 503. At this time, it is considered that the shaft system of the turbine is aligned. The other is that the laser beam is not aligned with all the coated glasses 503, that is, the laser beam is irradiated on the outside of the coated glass 503. Since the position deviation between the rotors 6 is large at this time, the probability is small, and it can be observed with the naked eye, and this result can be almost ignored.

[0067] In the measurement and positioning device for steam turbine installation provided by the present invention, the laser generator 403 and the coated glass 503 are lifted to the outside of the largest blade by the cooperation of the solid support arm 302 and the hollow support arm 301, so that the laser beam can pass through the obstacle and be received by the coated glass 503, so that the solid rotor 6 can be calibrated by laser to complete the installation. The device has a simple structure and low cost, and can be widely used in various shaft system calibration and positioning installation application scenarios. In addition, by observing the changes in the brightness of the laser beam, it is possible to accurately know which rotor 6 position in each cylinder area has shifted, assisting the installer to accurately adjust the rotor 6 that has shifted, making the shaft centering process more convenient and shortening the construction period. Furthermore, based on the relative position of the laser beam and the centering hole 504, the installer can observe and measure the offset angle and offset distance of the rotor 6, thereby assisting the installer to make corresponding adjustments to the position of the shifted rotor 6, with higher adjustment accuracy.

[0068] It should be noted that, in this document, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0069] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A measuring and positioning device for installing a steam turbine, comprising rotors (6); characterized in that: The invention also includes a laser emitting assembly (4) provided on the rotor (6) located in the generator area, wherein the laser emitting assembly (4) includes a laser generator (403); A laser receiving assembly (5) is provided on each of the rotors (6) located in the high-pressure cylinder area, the medium-pressure cylinder area, and the low-pressure cylinder area. The laser receiving assembly (5) includes a coated glass (503); a centering hole (504) is provided at the center of the coated glass (503); It also includes an upper fixing assembly (1) disposed below the laser emitting assembly (4) and the laser receiving assembly (5), and a lower fixing assembly (2) connected to the upper fixing assembly (1); An adjustment component (3) is provided between the upper fixing component (1) and the laser emitting component (4), and between the upper fixing component (1) and the laser receiving component (5). The adjustment component (3) comprises a hollow support arm (301); a solid support arm (302) is inserted into the hollow support arm (301).

2. A measurement and positioning device for steam turbine installation according to claim 1, characterized in that: The laser emitting assembly (4) further comprises a mounting block (404); a clamp (401) is fixedly connected to the upper portion of the mounting block (404); and the laser generator (403) is arranged inside the clamp (401).

3. The measurement and positioning device for steam turbine installation according to claim 1, characterized in that: The laser receiving assembly (5) further comprises a rectangular plug (502), which is inserted into the upper end of a solid support arm (302) located in the high-pressure cylinder area, the medium-pressure cylinder area or the low-pressure cylinder area; a circular frame (501) is fixedly connected to the upper end of the rectangular plug (502); a coated glass (503) is embedded in the frame (501) to reduce the brightness of the laser beam; and a centering hole (504) is opened in the coated glass (503), and the size of the centering hole (504) is equal to the diameter of the laser beam.

4. The measurement and positioning device for steam turbine installation according to claim 1, characterized in that: The upper fixing assembly (1) includes an upper fixing block (101); the lower fixing assembly (2) includes a lower fixing block (201); the upper fixing block (101) and the lower fixing block (201) together form a regular hexagonal structure, wherein the lower portion of the upper fixing block (101) is a notch-shaped structure with one side missing, and the notch has the same shape as the lower fixing block (201); the rotor (6) in each cylinder area is sleeved at the inner center of the regular hexagonal structure.

5. A measurement and positioning device for steam turbine installation according to claim 4, characterized in that: The upper fixing assembly (1) further comprises a nut seat (102) fixed to the centers of four sides of the upper fixing block (101); a screw rod (103) is internally threadedly connected to the nut seat (102); the inner end of the screw rod (103) penetrates the upper fixing block (101) and abuts against the rotor (6); and a rubber pad (104) is provided at the inner end of the screw rod (103).

6. The measurement and positioning device for steam turbine installation according to claim 4, characterized in that: The lower fixing assembly (2) further comprises a transparent hollow tube (202) fixedly connected to the lower surface of the lower fixing block (201); a sliding rod (203) is slidably connected inside the hollow tube (202); and a first scale (204) is provided on the outer surface of the sliding rod (203) along the length direction.

7. A measurement and positioning device for steam turbine installation according to claim 6, characterized in that: A sliding cavity (205) is provided inside the sliding rod (203); a sliding block (206) is estimated to be provided on the lower end surface of the hollow tube (202); and a spring (207) is provided between the upper end inside the sliding cavity (205) and the sliding block (206).

8. The measurement and positioning device for steam turbine installation according to claim 6, characterized in that: The adjustment assembly (3) further comprises a plane portion (306) provided on the upper side of the solid support arm (302) along the axial direction; a second butterfly-shaped top screw (308) is threadedly connected to the upper portion of the hollow support arm (301); a second scale (307) is provided on the plane portion (306) of the solid support arm (302); a digital level (305) is connected to the hollow support arm (301) via a tubular sliding sleeve (303); and the digital level (305) is fixed to a relative position on the hollow support arm (301) by means of the first butterfly-shaped top screw (304) and the sliding sleeve (303).

9. A measurement and positioning device for steam turbine installation according to any one of claim 1, characterized in that: The laser generator (403) emits a laser beam and sequentially irradiates the coated glass (503) on each rotor (6). If the laser beam penetrates the coated glass (503) located in the high-pressure cylinder area with high brightness, it indicates that the turbine shaft system is centered. If the laser beam gradually penetrates the coated glass (503) located in the low-pressure cylinder area, the medium-pressure cylinder area, and the high-pressure cylinder area with low brightness, it indicates that the turbine shaft system is offset and each rotor (6) needs to be fine-tuned.

10. A measurement and positioning device for steam turbine installation according to any one of claim 1, characterized in that: A laser beam is emitted by a laser generator (403) so that the laser beam is irradiated on the coated glass (503), so that the brightness of the laser beam decays when the laser beam sequentially penetrates the coated glass (503) in each cylinder area. If the brightness of the laser beam inside each cylinder area is different, it means that the laser beam is completely irradiated on the coated glass (503) inside each cylinder area, and the central axis of each rotor (6) is relatively aligned, but not completely aligned. At this time, the position of the rotor (6) in the high-pressure area can be fine-tuned according to the position of the rotor (6) in the low-pressure area until the laser beam appears as a straight line with the highest brightness. At this time, it is considered that the rotor (6) inside each cylinder area is completely aligned.

Images