Vertical turbine runner chamber petal replacement method and runner chamber measurement and polishing device

Abstract

A method for replacing the petal of a runner chamber of a vertical turbine unit and a device for measuring and grinding the runner chamber, the method comprises: making a new runner chamber, cutting the petals of the new runner chamber, processing the assembled petal body, preparing the petal body before installation, installing the petal body, grouting, and measuring and grinding the new runner chamber. The method realizes efficient replacement of the runner chamber and inspection of the inner wall of the runner chamber, and the parameters of the runner chamber are precisely controlled. The device comprises two cross-shaped brackets, a rotating shaft, two flange bearings, two sets of adjustment parts, a rotating frame, two limit studs, a measuring and grinding mechanism, four precision linear guide rails and a precision slide block; the new runner chamber in the vertical turbine unit is in a non-contact state with the cross-shaped bracket, and the cross-shaped bracket is welded with the guide blade bottom ring and the tailwater pipe in the vertical turbine unit; through the adjustment part, the axis of the rotating shaft coincides with the center line of the new runner chamber, and the flange bearing is positioned; the measuring head and the grinding head of the angle grinder point to the inner wall of the new runner chamber. The device has a reasonable structure and is easy to use.

Description

Technical Field

[0001] The invention belongs to the technical field of vertical water turbine unit maintenance, and in particular relates to a method for replacing petals of a runner chamber of a vertical water turbine unit and a runner chamber measuring and polishing device. Background Art

[0002] There are many structural forms of hydroelectric generator sets in hydropower stations, among which: vertical turbine sets (also known as vertical axial-flow turbine generator sets) have high efficiency, stable and reliable operation, and low failure rate. However, the underwater flow-through components located at the bottom of the vertical turbine sets are prone to cavitation and difficult to repair. It is difficult to detect and deal with them in time. They can only be carefully inspected when the vertical turbine sets are overhauled or dismantled. The general overhaul cycle is more than three years. Once cavitation occurs, it will become more and more serious, and it is very easy to cause damage to the corresponding cavitation components.

[0003] Generally, the runner chamber in a vertical turbine unit is cast in a concrete pit and is made of carbon steel. During the operation of the vertical turbine unit, cavitation is prone to occur in the runner chamber, resulting in a large gap between the runner chamber and the runner blades inside, and a decrease in the efficiency of the vertical turbine unit. Minor runner chamber cavitation can be filled with composite materials, but when the runner chamber cavitation is severe, the runner chamber can only be replaced as a whole.

[0004] The design parameters of the runner chamber include center, inner diameter, roundness, cylindricity, etc., and the control requirements for the above design parameters of the runner chamber are relatively high; the gap between the runner chamber in the vertical turbine unit and the runner blades inside it is generally about 2mm. The vertical turbine unit also includes a guide blade bottom ring and a tailwater pipe arranged at intervals up and down. The upper and lower sides of the runner chamber are welded to the guide blade bottom ring and the tailwater pipe respectively.

[0005] After all the relevant parts of the vertical turbine are installed, the runner chamber cannot be taken out of the machine pit as a whole. In other words, when the runner chamber is replaced, it cannot enter the corresponding installation position as a whole. Therefore, a stable, reliable and accurate method for replacing the petals of the runner chamber of a vertical turbine unit and a matching runner chamber measuring and polishing device are urgently needed. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a method for replacing the petals of a runner chamber of a vertical turbine unit, which ensures efficient replacement of the runner chamber and maintenance of the inner wall of the runner chamber, so that the parameters of the runner chamber are accurately controlled.

[0007] The technical problem that the present invention needs to solve is to provide a wheel chamber measuring and polishing device used in the above-mentioned petal replacement method, which has a reasonable structure and is easy to use.

[0008] In order to solve the above technical problems, the present invention provides a method for replacing the petals of a runner chamber of a vertical turbine unit, comprising the following steps:

[0009] S1 New Wheel Chamber Production:

[0010] The new runner chamber is made of stainless steel plate and hot rolled. It is in the shape of a cylinder with open upper and lower sides. After eliminating stress according to conventional technology, several horizontally arranged annular ribs are installed on its outer cylindrical surface. The height and outer diameter of the new runner chamber refer to the design parameters of the original runner chamber. The thickness of the stainless steel plate is based on the thickness of the original runner chamber plus the grinding allowance.

[0011] S2 new rotor chamber petal cutting:

[0012] 1) The new runner chamber shall be divided into at least three petals, and the chord length of each petal shall be less than the inner diameter of the original runner chamber. The inner and outer petal dividing lines shall be on the same longitudinal cutting plane passing through the center line of the new runner chamber along the longitudinal dividing lines of the inner and outer cylinders of the new runner chamber;

[0013] 2) Three connection components are welded on both sides of each outer petal line in the circumferential direction and along the height direction of the new runner chamber. The three connection components are respectively located at the upper side, the middle part and the lower side in the height direction of the new runner chamber. Each connection component includes two connection pieces symmetrically arranged along the circumferential direction of the corresponding outer petal line. Each connection piece is respectively welded to the outer cylindrical surface of the new runner chamber and the upper side surface of the annular rib. Each connection component is first positioned with a positioning pin and then fastened with a bolt;

[0014] 3) Cut along each inner petal line to divide the new runner chamber longitudinally into at least three petal bodies;

[0015] 4) Tighten the bolts in sequence to tightly connect and assemble at least three petal bodies after cutting;

[0016] S3 processes the combined petal body:

[0017] The inner cylindrical surface of the assembled petal body is processed by lathe, and the inner cylindrical error of each petal body is controlled to be less than 2mm, and the maximum inner diameter is less than the design value of the original runner chamber, and a first supporting channel steel is welded on the upper and lower sides of each petal body;

[0018] Preparation before installing the S4 split body:

[0019] Build a working platform with all safety protection measures in place inside the original runner room; dismantle the original runner room according to the size of the new runner room, and chisel away the concrete around the original runner room to the required pouring space; drill a number of grouting holes on the guide blade bottom ring connected to the upper side of the original runner room in the vertical turbine unit, the grouting holes are connected to the pouring space, the distance between two adjacent grouting holes is less than one meter, and the pouring space is flushed with water;

[0020] S5 installation split body:

[0021] 1) First, remove the bolts of each connection assembly, and successively hoist at least three petal bodies into the installation position of the original runner chamber. Any two adjacent petal bodies are matched according to the positioning pins, and the bolts of the corresponding connection assemblies are tightened, and then the new runner chamber is connected and assembled again, so that the inner cylindrical surface and the outer cylindrical surface of the new runner chamber form at least three vertically arranged seams in the circumferential direction; after checking the inner diameter deviation value of the new runner chamber, the new runner chamber is horizontally moved to expose the seams of the outer cylindrical surface respectively, and the seams are welded from the outer cylindrical surface in turn, so that the new runner chamber is in place, and then the first supporting channel steel on each petal body is removed;

[0022] 2) With the center line of the guide blade bottom ring and the tailwater pipe in the vertical turbine unit as the reference, adjust the center and level of the new runner chamber to meet the design requirements; after the above adjustment is completed, the upper and lower sides of the new runner chamber are spot welded to the guide blade bottom ring and the tailwater pipe in the vertical turbine unit respectively, and four welding points are evenly distributed circumferentially on the upper and lower sides of the new runner chamber. After welding is completed, measure the center and level of the new runner chamber. If the deviation is greater than the design requirements, remove the welding points, adjust them, and then re-weld them. The welding should be performed symmetrically;

[0023] 3) After the new runner chamber has been in use for 12 hours, recheck the corresponding parameters of its centering and horizontality; if the above two parameters are normal, weld a second supporting channel steel for connection at the corresponding position between the upper side and the lower side of each two adjacent petal bodies; if the above two parameters are abnormal, repeat the step 2) of S5 to install the petal bodies until the above two parameters are normal, and then weld a second supporting channel steel for connection at the corresponding position between the upper side and the lower side of each two adjacent petal bodies;

[0024] Finally, complete the welding of each seam of the inner cylindrical surface of the new runner chamber, and the welding should also be done symmetrically;

[0025] S6 grouting:

[0026] Use commercially available non-shrinkage cement grouting material to sequentially grout through the above-mentioned several grouting holes; during grouting, two people operate, one person grouts, and the other uses a vibration pump to extend from the adjacent grouting hole into the grouting area to vibrate repeatedly to ensure that the grouting is dense; several grouting holes are grouted in turn and circulated until grout is discharged from the adjacent grouting holes; after the grouting is completed, several grouting holes are blocked; after 72 hours, the second supporting channel steel between the upper side and the lower side of each two adjacent petal bodies is removed, the new runner chamber is cleaned, and each weld and each welding point is polished and flushed;

[0027] S7 measuring and grinding new wheel chamber:

[0028] 1) According to the height of the new runner chamber, use a commercially available laser theodolite to set several horizontal cross sections for horizontal measurement on the inner wall of the new runner chamber, with at least 16 measurement points evenly distributed around the circumference of each horizontal cross section;

[0029] 2) Install two cross-shaped brackets of the runner chamber measuring and polishing device at corresponding positions above and below the new runner chamber, respectively, and the two cross-shaped brackets are welded to the guide vane bottom ring and the tailwater pipe respectively; then install a vertically arranged rotating shaft between the central areas of the two cross-shaped brackets, and adjust the axis of the rotating shaft to coincide with the above-mentioned central connecting line based on the central connecting line of the guide vane bottom ring and the tailwater pipe in the vertical turbine unit; finally, complete the installation of the runner chamber measuring and polishing device, and adjust the setting value of the measuring rod of the measuring mechanism in the runner chamber measuring and polishing device according to the designed inner diameter of the new runner chamber;

[0030] 3) Use the above-mentioned measuring mechanism to measure point by point and record the data of each measuring point; for the area where the inner diameter is smaller than the design value range, use the grinding mechanism in the wheel chamber measuring and grinding device to grind; for the area where the inner diameter is larger than the design value range, first fill it with a stainless steel welding rod and then use the above-mentioned grinding mechanism to grind; when grinding, use a ruler and arc template to check the cylindricity and roundness; measurement and grinding should be repeated and continued until the inner diameter, cylindricity and roundness of the new wheel chamber meet the requirements;

[0031] 4) The measuring and polishing device of the runner chamber was removed, and the center line of the new runner chamber, the guide blade bottom ring and the center line of the tailwater pipe were checked to see if they were in the same line. After the replacement site of the new runner chamber was cleaned up, the replacement of the runner chamber petals of the vertical turbine unit was completed.

[0032] In order to explain the problem briefly and clearly, the following method of replacing the petals of the runner chamber of a vertical turbine unit is referred to as this method.

[0033] For this method:

[0034] In step S1, in the production of the new runner chamber, the new runner chamber adopts a stainless steel plate, which improves the cavitation resistance of the new runner chamber, making it very excellent in cavitation resistance, fundamentally solving the cavitation problem of the runner chamber, ensuring that the cavitation damaged area is completely replaced, and extending the service life of the vertical turbine unit; a number of horizontally arranged annular ribs are installed on the outer cylindrical surface of the new runner chamber to prevent its deformation due to heat; the thickness of the stainless steel plate is increased by a wear allowance according to the thickness of the original runner chamber, ensuring the wear allowance requirement of the new runner chamber;

[0035] In step S2, in the petal cutting of the new runner chamber, the new runner chamber is at least evenly divided into three petals, and the chord length of each petal body is smaller than the inner diameter of the original runner chamber, so that it is fully guaranteed that each petal body can be successfully hoisted and enter the corresponding position of the original runner chamber of the vertical turbine unit; three connecting components are welded on both sides of the circumference of the outer petal line and along the height direction of the new runner chamber, each connecting component is first positioned with a positioning pin and then fastened with a bolt, and the new runner chamber is cut along the inner petal line to split the new runner chamber into petals in the longitudinal direction to form at least three petal bodies, so that the deformation of the new runner chamber after cutting and splitting can be avoided;

[0036] In step S3, the inner cylindrical surface of the combined petal body is processed by a lathe, and the inner cylindrical error of each petal body is controlled to be less than 2 mm, and the maximum inner diameter is smaller than the design value of the original runner chamber, so that a grinding margin that can be precisely adjusted is left for the subsequent measurement and grinding of the new runner chamber; a first supporting channel steel is welded on the upper and lower sides of each petal body, so as to ensure that the relevant parameters of the new runner chamber will not change during transportation and hoisting;

[0037] In step S5 of installing the petal bodies, a second supporting channel steel for connecting is welded at corresponding positions between the upper sides and the lower sides of each two adjacent petal bodies, so as to temporarily reinforce the new runner chamber and stabilize its dimensions;

[0038] In step S7 of measuring and polishing the new runner chamber, the measuring mechanism and polishing mechanism in the installed runner chamber measuring and polishing device are used to repeatedly and continuously measure, fill and / or polish the new runner chamber until the inner diameter, cylindricity and roundness of the new runner chamber all meet the requirements, thereby ensuring the maintenance of the inner wall of the runner chamber and accurately controlling the parameters of the runner chamber; finally, the runner chamber measuring and polishing device is removed, and the center line of the new runner chamber, the center line of the guide vane bottom ring and the tailwater pipe are checked to see if they are in the same line, and after cleaning the replacement site of the new runner chamber, the replacement of the runner chamber petals of the vertical turbine unit is completed.

[0039] It can be seen that this method is suitable for replacing the original runner chamber, and the water guide blade bottom ring and other components on the upper side of the original runner chamber do not need to be removed, which improves the replacement accuracy of the runner chamber, saves the replacement workload of the runner chamber, and has strong economy and practicality. Therefore, the beneficial effect of this method is to ensure the efficient replacement of the runner chamber and the maintenance of the inner wall of the runner chamber, so that the parameters of the runner chamber are accurately controlled.

[0040] In order to solve the above technical problems, the present invention also provides a wheel chamber measuring and grinding device used in the above petal replacement method, which includes two horizontally arranged cross-shaped brackets spaced apart from each other, a vertically arranged rotating shaft, two horizontally arranged flange bearings, two sets of horizontally arranged and vertically spaced adjusting parts, a vertically arranged rotating frame, two horizontally arranged and vertically spaced limiting studs, four vertically arranged precision linear guide rails, four vertically arranged precision slide blocks, a horizontally arranged measuring mechanism, and a horizontally arranged grinding mechanism;

[0041] A flange bearing and a set of adjusting parts for aligning the flange bearing are provided in the central area of ​​each cross-shaped bracket, each set of adjusting parts includes four groups of adjusting bolts evenly distributed along the circumference of the cross-shaped bracket, each group of adjusting bolts passes through the cross-shaped bracket and is threadedly connected to the cross-shaped bracket, and the threaded end of each group of adjusting bolts contacts the outer cylindrical surface of the flange bearing;

[0042] The rotating shaft is arranged between the central areas of the two cross-shaped brackets after the upper and lower ends of the rotating shaft are correspondingly plugged into the two flange bearings;

[0043] The rotating frame is a horizontal U-shaped flat frame, and the open end of the rotating frame is arranged on the rotating shaft through two limit studs;

[0044] Two precision linear guide rails spaced apart and parallel to each other are installed on each side of the closed end of the rotating frame in the thickness direction, and each precision linear guide rail is provided with a precision sliding block matched therewith;

[0045] Two precision slide blocks on one side of the rotating frame in the thickness direction are connected to the inner side of the measuring mechanism close to the rotating frame, and two precision slide blocks on the other side of the rotating frame in the thickness direction are connected to the inner side of the grinding mechanism close to the rotating frame, so that the measuring mechanism is located on one side of the rotating frame in the thickness direction, and the grinding mechanism is located on the other side of the rotating frame in the thickness direction, and the measuring mechanism and the grinding mechanism both extend along the length direction of the rotating frame;

[0046] When the runner chamber measuring and grinding device is installed with the vertical turbine unit:

[0047] The installation position of the cross-shaped bracket on the upper side is higher than the new runner chamber in the vertical turbine unit, and the installation position of the cross-shaped bracket on the lower side is lower than the new runner chamber. The new runner chamber is in a non-contact state with the two cross-shaped brackets respectively, and the two cross-shaped brackets are respectively welded to the guide blade bottom ring and the tailwater pipe in the vertical turbine unit;

[0048] Through two sets of adjustment parts, the axis of the rotating shaft is made to coincide with the center line of the new runner chamber and the flange bearing is positioned;

[0049] The measuring head of the measuring mechanism and the grinding head of the angle grinder of the grinding mechanism are both directed toward the inner wall of the new wheel chamber.

[0050] In order to explain the problem briefly and clearly, the wheel chamber measuring and polishing device used in the above-mentioned petal replacement method is referred to as this device below.

[0051] In the present device, the measuring mechanism is located on one side of the rotating frame in the thickness direction, and the grinding mechanism is located on the other side of the rotating frame in the thickness direction, and both the measuring mechanism and the grinding mechanism extend along the length direction of the rotating frame. The measuring head of the measuring mechanism and the grinding head of the angle grinder of the grinding mechanism both point to the inner wall of the new runner chamber in the vertical turbine unit. The measuring mechanism and the grinding mechanism are cleverly and reasonably arranged in position, and only one construction worker is required. With the help of the measuring mechanism and the grinding mechanism, the new runner chamber can be conveniently measured and ground at the same time. Therefore, the structure of the present device is reasonable.

[0052] The measuring principle of the present device is the same as that of the electroacoustic loop measurement method. The measuring accuracy of the present device is high, the measuring error is no more than 0.02mm, the measuring construction is simple and reliable, and the measuring construction and the grinding construction are carried out simultaneously, and the measured relevant parameters of the new runner chamber (such as inner diameter, cylindricity, roundness) can be read at any time; with the present device, only one construction worker is needed, who moves the angle grinder according to the indication values ​​of the indicator light and the dial indicator, and can conveniently perform the measuring and grinding construction on the new runner chamber, and only needs 2-3 days to complete the measuring construction and grinding construction of the new runner chamber (however, if the measuring construction and grinding construction of the new runner chamber are carried out manually, 3 construction workers need 6-7 days). In this way, the construction efficiency of the measuring and grinding of the new runner chamber is greatly improved, the labor intensity of the measuring and grinding of the new runner chamber is greatly reduced, and the control accuracy of the relevant parameters of the new runner chamber is effectively improved.

[0053] Therefore, the device has reasonable structure and is easy to use.

[0054] Further, the measuring mechanism includes a nylon seat, a measuring rod, a measuring head, a compression spring, a limit nut, a dial indicator touch plate, a clamping nut, an indicator light, a battery box, a dial indicator support, a support rod, and a dial indicator;

[0055] The nylon seat and measuring rod are arranged horizontally;

[0056] The nylon seat is a rectangular parallelepiped with a horizontal step through hole inside. The length of the nylon seat is shorter than the length of the measuring rod. Two precision slide blocks on one side of the rotating frame in the thickness direction are connected to the inner side of the nylon seat close to the rotating frame.

[0057] Set the direction of the nylon seat, the step through hole, and the measuring rod close to the closed end of the rotating frame as the front, and set the direction of the nylon seat, the step through hole, and the measuring rod away from the closed end of the rotating frame as the back;

[0058] The measuring rod is connected with the nylon seat inner and outer by means of the step through hole, and both ends of the measuring rod are located outside the nylon seat. The rear part of the measuring rod is provided with an external thread, and the measuring rod is electrically insulated from the rotating frame through the nylon seat.

[0059] The step through hole is composed of a small hole and a large hole which are connected front and back and have a coaxial line, and an annular step surface is formed between the small hole and the large hole;

[0060] The indicator lights, battery box and dial indicator support which are spaced in sequence from front to back are arranged on the outside of the nylon base away from the rotating frame;

[0061] The measuring head is arranged at the front end of the measuring rod, the limit nut in contact with the rear end of the nylon seat is arranged at the middle of the measuring rod, and the dial indicator touch plate arranged vertically and extending toward the outside of the nylon seat is arranged at the rear end of the measuring rod by means of a clamping nut screwed with the measuring rod;

[0062] The compression spring is sleeved on the front part of the measuring rod, one end of the compression spring contacts the step surface of the step through hole, and the other end contacts the measuring head;

[0063] A support rod which is arranged horizontally and extends toward the dial gauge touch plate is arranged on the dial gauge support seat, the dial gauge is arranged at the end of the support rod which is away from the dial gauge support seat, and the dial gauge head is in contact with the dial gauge touch plate.

[0064] The structure of the measuring mechanism is reasonable.

[0065] Further, the grinding mechanism includes a vertically movable base, a horizontally arranged linear guide rail, a slider matched with the linear guide rail, a horizontally movable base, a plurality of clamps, an angle grinder, an adjusting nut, a spring, and a horizontally arranged connecting screw;

[0066] Set the direction of the vertical movable base and the horizontal movable base close to the closed end of the rotating frame as the front, and set the direction of the vertical movable base and the horizontal movable base away from the closed end of the rotating frame as the rear;

[0067] The vertical movable base and the horizontal movable base are both in a horizontal L-shape, the vertical movable base includes a first front section and a first rear section connected front and back at an angle of 90 degrees, and the horizontal movable base includes a second front section and a second rear section connected front and back at an angle of 90 degrees, and the first rear section and the second rear section both extend in a direction away from the rotating frame;

[0068] Two precision slide blocks on the other side of the rotating frame in the thickness direction are connected to the inner side of the first front section of the vertical movable base close to the rotating frame;

[0069] The linear guide rail is arranged at the first front section of the vertical movable base away from the outer side of the rotating frame and parallel to the rotating frame;

[0070] The front part of the second front section of the horizontal movable base is fitted and connected with the slider, a plurality of clamps are connected with the outer side of the second front section of the horizontal movable base away from the rotating frame, and the angle grinder is arranged on the outer side of the second front section of the horizontal movable base away from the rotating frame through the plurality of clamps;

[0071] The connecting screw passes through the first rear section of the vertical movable base and is threadedly connected to the second rear section of the horizontal movable base. The connecting screw is located between the first rear section and the second rear section, and a spring and an adjusting nut are respectively installed on the rod body. Both ends of the spring are in contact with the first rear section and the adjusting nut.

[0072] The grinding mechanism has a reasonable structure.

[0073] Furthermore, the indicator light uses a number of LED lamp beads connected in parallel, and a 5# battery is installed in the battery box. In this way, the indicator light's indication reliability is improved.

[0074] Furthermore, the grinding tool of the angle grinder adopts alloy grinding discs, which can reduce dust pollution and improve grinding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] Figure 1 It is the process flow chart of this method.

[0076] Figure 2 It is a three-dimensional diagram of the new runner chamber of the present method after being longitudinally divided into three petal bodies.

[0077] Figure 3 It is a stereoscopic diagram of processing the combined petal body according to the present method.

[0078] Figure 4 It is a stereoscopic diagram of installing the petal body according to the present method.

[0079] Figure 5 It is a three-dimensional diagram of the device.

[0080] Figure 6 It is another stereogram of the device.

[0081] Figure 7 It is a stereoscopic diagram of the new wheel chamber of the device and the method after being assembled.

[0082] Figure 8 yes Figure 7 A partial enlarged view of part A.

[0083] Fig. 9 It is a schematic diagram of the structure of the measuring mechanism in this device.

[0084] Fig.10 It is a structural schematic diagram of the grinding mechanism in the device.

[0085] Fig.11It is a schematic diagram of the structure after the rotating shaft in the device is assembled with two cross-shaped brackets and a rotating frame.

[0086] In the attached figure: 1. New runner chamber; 1a. Ring rib; 1b. Petal body; 2. Connector; 3a. First support channel steel; 3b. Second support channel steel; 4. Rotating shaft; 5. Cross bracket; 6. Adjusting bolt; 7. Flange bearing; 8. Precision linear guide; 9. Measuring mechanism; 9a. Nylon seat; 9b. Measuring head; 9c. Compression spring; 9d. Indicator light; 9e. Battery box; 9f. Dial indicator support; 9g. Support rod; 9h. Limit nut; 9i. Dial indicator; 9j. Dial indicator touch plate; 9k. Clamping nut; 9m. Measuring rod; 9n .Step through hole; 10. Rotating frame; 11. Grinding mechanism; 11a. Linear guide; 11b. Slider; 11c. Angular grinder; 11d. Clamp; 11da. U-clip; 11db. Locking screw; 11dc. Butterfly nut; 11e. Horizontal movable base; 11ea. Second front section; 11eb. Second rear section; 11f. Adjusting nut; 11g. Spring; 11h. Vertical movable base; 11ha. First front section; 11hb. First rear section; 11i. Connecting screw; 12. Limiting stud; 13. Precision slider. DETAILED DESCRIPTION

[0087] See also Figure 1-Figure 11 , the method comprises the following steps:

[0088] S1 New Wheel Room 1 Production:

[0089] The new runner chamber 1 is made of stainless steel plate and hot rolled. It is in the shape of a cylinder with open upper and lower sides. After eliminating stress according to conventional technology, a number of horizontally arranged annular ribs 1a are installed on its outer cylindrical surface. The height and outer diameter of the new runner chamber 1 refer to the design parameters of the original runner chamber. The thickness of the stainless steel plate is based on the thickness of the original runner chamber plus the grinding allowance.

[0090] S2 new rotor chamber 1 split cutting:

[0091] 1) The new runner chamber 1 is to be evenly divided into three petals, and the chord length of each petal body 1b is smaller than the inner diameter of the original runner chamber. The inner and outer petal dividing lines are drawn along the longitudinal petal dividing lines on the inner and outer cylindrical surfaces of the new runner chamber 1. The inner and outer petal dividing lines should be on the same longitudinal cutting plane passing through the center line of the new runner chamber 1;

[0092] 2) Three connection components are welded on both sides of each outer petal line in the circumferential direction and along the height direction of the new runner chamber 1. The three connection components are respectively located at the upper side, the middle part and the lower side in the height direction of the new runner chamber 1. Each connection component includes two connection pieces 2 that are symmetrically arranged along the circumferential direction of the corresponding outer petal line. Each connection piece 2 is respectively welded to the outer cylindrical surface of the new runner chamber 1 and the upper side surface of the annular rib 1a. Each connection component is first positioned with a positioning pin and then fastened with a bolt;

[0093] 3) Cut along each inner petal line to divide the new runner chamber 1 longitudinally and evenly into three petal bodies 1b;

[0094] 4) Tighten the bolts in sequence to tightly connect the three petal bodies 1b after cutting;

[0095] S3 processes the assembled petal body 1b:

[0096] The inner cylindrical surface of the assembled petal body 1b is processed by lathe, and the inner cylindrical error of each petal body 1b is controlled to be less than 2mm, and the maximum inner diameter is less than the design value of the original runner chamber, and a first supporting channel steel 3a is welded on the upper and lower sides of each petal body 1b;

[0097] S4 petal body 1b installation preparation:

[0098] A working platform with all safety protection measures is built inside the original runner room; the original runner room is dismantled according to the size of the new runner room 1, and the concrete around the original runner room is chiseled out to the required pouring space, and a number of grouting holes are drilled on the guide blade bottom ring connected to the upper side of the original runner room in the vertical turbine unit. The grouting holes are connected to the pouring space, and the distance between two adjacent grouting holes is less than one meter, and the pouring space is flushed with water;

[0099] S5 installation split body 1b:

[0100] 1) First, remove the bolts of each connection assembly, and successively hoist the three petal bodies 1b into the installation position of the original runner chamber. Any two adjacent petal bodies 1b are matched according to the positioning pins, and the bolts of the corresponding connection assemblies are tightened, and the new runner chamber 1 is connected and assembled again, so that the inner cylindrical surface and the outer cylindrical surface of the new runner chamber 1 form three vertically arranged seams in the circumferential direction; after checking the inner diameter deviation value of the new runner chamber 1, the new runner chamber 1 is horizontally moved to expose the seams of the outer cylindrical surface respectively, and the seams are welded from the outer cylindrical surface in turn, so that the new runner chamber 1 is in place, and then the first supporting channel steel 3a on each petal body 1b is removed;

[0101] 2) Taking the center line of the guide blade bottom ring and the tailwater pipe in the vertical turbine unit as the reference, adjust the center degree and horizontal degree of the new runner chamber 1 to meet the design requirements; after the above adjustment is completed, the upper side and the lower side of the new runner chamber 1 are spot welded to the guide blade bottom ring and the tailwater pipe in the vertical turbine unit respectively, and four welding points are evenly distributed circumferentially on the upper side and the lower side of the new runner chamber 1. After welding is completed, measure the center degree and horizontal degree of the new runner chamber 1. If the deviation is greater than the design requirement, the welding points need to be removed, adjusted and then re-welded, and the welding should be performed symmetrically;

[0102] 3) After the new runner chamber 1 has been in use for 12 hours, recheck the corresponding parameters of its centering and horizontality; if the above two parameters are normal, weld a second supporting channel steel 3b for connection at the corresponding positions between the upper sides and the lower sides of each two adjacent petal bodies 1b; if the above two parameters are abnormal, repeat the step 2) of installing the petal bodies 1b in S5 until the above two parameters are normal, and then weld a second supporting channel steel 3b for connection at the corresponding positions between the upper sides and the lower sides of each two adjacent petal bodies 1b;

[0103] Finally, complete the welding of each seam of the inner cylindrical surface of the new runner chamber 1, and the welding should also be performed symmetrically;

[0104] S6 grouting:

[0105] Use commercially available non-shrinkage cement grouting material to sequentially grout through the above-mentioned several grouting holes; during grouting, two people operate, one person grouts, and the other uses a vibration pump to extend from the adjacent grouting hole into the grouting area to vibrate repeatedly to ensure that the grouting is dense; several grouting holes are grouted in turn and circulated until grout is discharged from the adjacent grouting holes; after the grouting is completed, the several grouting holes are blocked; after 72 hours, the second support channel steel 3b between the upper side and the lower side of each two adjacent petal bodies 1b is removed, the new runner chamber 1 is cleaned, and each weld and each welding point is polished flush;

[0106] S7 measuring and grinding new wheel chamber 1:

[0107] 1) According to the height of the new runner chamber 1, a commercially available laser theodolite is used to set several horizontal cross sections for horizontal measurement on the inner wall of the new runner chamber 1, and 16 measuring points are evenly distributed in the circumference of each horizontal cross section;

[0108] 2) Two cross-shaped brackets 5 of the runner chamber measuring and polishing device are respectively installed at corresponding positions above and below the new runner chamber 1, and the two cross-shaped brackets 5 are respectively welded to the guide blade bottom ring and the tailwater pipe; then a vertically arranged rotating shaft 4 is installed between the central areas of the two cross-shaped brackets 5, and the center line of the guide blade bottom ring and the tailwater pipe in the vertical turbine unit is used as a reference, and the axis of the rotating shaft 4 is adjusted to coincide with the above-mentioned center line; finally, the installation of the runner chamber measuring and polishing device is completed, and the setting value of the measuring rod 9m of the measuring mechanism 9 in the runner chamber measuring and polishing device is adjusted according to the designed inner diameter of the new runner chamber 1;

[0109] 3) Use the above-mentioned measuring mechanism 9 to measure point by point and record the data of each measuring point; for the area where the inner diameter is smaller than the design value range, use the grinding mechanism 11 in the wheel chamber measuring and grinding device to grind; for the area where the inner diameter is larger than the design value range, first fill it with a stainless steel welding rod and then use the above-mentioned grinding mechanism 11 to grind; when grinding, use a ruler and an arc template to check the cylindricity and roundness; measurement and grinding should be repeated and continued until the inner diameter, cylindricity and roundness of the new wheel chamber 1 meet the requirements;

[0110] 4) The runner chamber measuring and polishing device was removed, and the center line of the new runner chamber 1, the guide blade bottom ring and the center line of the tailwater pipe were checked to see if they were in the same line. After the replacement site of the new runner chamber 1 was cleaned up, the replacement of the runner chamber petals of the vertical turbine unit was completed.

[0111] The model of the non-shrinkage cement grouting material is: KK-52, and its manufacturer is: Ningbo Huade New Building Materials Co., Ltd. The vertical turbine unit, guide blade bottom ring, original runner chamber, tailwater pipe, casting space, grouting hole, and working platform are not shown in the attached drawings; the working platform is a conventional technical part (that is, the working platform is a conventional scaffolding).

[0112] See also Figure 5-Figure 11 The device comprises two horizontally arranged cross-shaped brackets 5 spaced apart from each other, a vertically arranged rotating shaft 4, two horizontally arranged flange bearings 7, two sets of horizontally arranged adjusting members spaced apart from each other, a vertically arranged rotating frame 10, two horizontally arranged limit studs 12 spaced apart from each other, four vertically arranged precision linear guide rails 8, four vertically arranged precision slide blocks 13, a horizontally arranged measuring mechanism 9, and a horizontally arranged grinding mechanism 11;

[0113] A flange bearing 7 and a set of adjusting parts for aligning the flange bearing 7 are provided in the central area of ​​each cross-shaped bracket 5. Each set of adjusting parts includes four groups of adjusting bolts 6 evenly distributed along the circumference of the cross-shaped bracket 5. Each group of adjusting bolts 6 passes through the cross-shaped bracket 5 and is threadedly connected to the cross-shaped bracket 5. The threaded end of each group of adjusting bolts 6 contacts the outer cylindrical surface of the flange bearing 7.

[0114] The rotating shaft 4 is arranged between the central areas of the two cross-shaped brackets 5 after the upper and lower ends thereof are correspondingly plugged into the two flange bearings 7;

[0115] The rotating frame 10 is a horizontal U-shaped flat frame, and the open end of the rotating frame 10 is arranged on the rotating shaft 4 through two limit studs 12;

[0116] Two precision linear guide rails 8 spaced apart and parallel to each other are installed on each side of the closed end of the rotating frame 10 in the thickness direction, and each precision linear guide rail 8 is provided with a precision slider 13 matched therewith;

[0117] Two precision slide blocks 13 on one side of the rotating frame 10 in the thickness direction are connected to the inner side of the measuring mechanism 9 close to the rotating frame 10, and two precision slide blocks 13 on the other side of the rotating frame 10 in the thickness direction are connected to the inner side of the grinding mechanism 11 close to the rotating frame 10, so that the measuring mechanism 9 is located on one side of the rotating frame 10 in the thickness direction, and the grinding mechanism 11 is located on the other side of the rotating frame 10 in the thickness direction, and the measuring mechanism 9 and the grinding mechanism 11 are extended along the length direction of the rotating frame 10;

[0118] When the runner chamber measuring and grinding device is installed with the vertical turbine unit:

[0119] The installation position of the cross-shaped bracket 5 on the upper side is higher than the new runner chamber 1 in the vertical turbine unit, and the installation position of the cross-shaped bracket 5 on the lower side is lower than the new runner chamber 1. The new runner chamber 1 is in a non-contact state with the two cross-shaped brackets 5 respectively, and the two cross-shaped brackets 5 are respectively welded to the guide blade bottom ring and the tailwater pipe in the vertical turbine unit;

[0120] Through two sets of adjustment parts, the axis of the rotating shaft 4 is made to coincide with the center line of the new runner chamber 1, and the flange bearing 7 is positioned;

[0121] The measuring head 9 b of the measuring mechanism 9 and the grinding head of the angle grinder 11 c of the grinding mechanism 11 are both directed toward the inner wall of the new wheel chamber 1 .

[0122] The measuring mechanism 9 includes a nylon seat 9a, a measuring rod 9m, a measuring head 9b, a compression spring 9c, a limit nut 9h, a dial gauge touch plate 9j, a clamping nut 9k, an indicator light 9d, a battery box 9e, a dial gauge support 9f, a support rod 9g, and a dial gauge 9i;

[0123] The nylon seat 9a and the measuring rod 9m are both arranged horizontally;

[0124] The nylon seat 9a is a rectangular parallelepiped with a horizontal step through hole 9n inside. The length of the nylon seat 9a is less than the length of the measuring rod 9m. Two precision slide blocks 13 on one side of the rotating frame 10 in the thickness direction are connected to the inner side of the nylon seat 9a close to the rotating frame 10.

[0125] The direction in which the nylon seat 9a, the stepped through hole 9n and the measuring rod 9m are close to the closed end of the rotating frame 10 is set as the front, and the direction in which the nylon seat 9a, the stepped through hole 9n and the measuring rod 9m are away from the closed end of the rotating frame 10 is set as the rear;

[0126] The measuring rod 9m is connected to the nylon seat 9a through the step through hole 9n, and both ends of the measuring rod 9m are located outside the nylon seat 9a. The rear part of the measuring rod 9m is provided with an external thread. The measuring rod 9m is electrically insulated from the rotating frame 10 through the nylon seat 9a.

[0127] The step through hole 9n is composed of a small hole and a large hole connected front and back and coaxial, and an annular step surface is formed between the small hole and the large hole;

[0128] The indicator lights 9d, the battery box 9e, and the dial indicator support 9f are arranged on the outside of the nylon seat 9a away from the rotating frame 10.

[0129] The measuring head 9b is arranged at the front end of the measuring rod 9m, the limit nut 9h contacting the rear end of the nylon seat 9a is arranged at the middle of the measuring rod 9m, and the dial indicator touch plate 9j arranged vertically and extending toward the outside of the nylon seat 9a is arranged at the rear end of the measuring rod 9m by means of a clamping nut 9k screwed with the measuring rod 9m;

[0130] The compression spring 9c is sleeved on the front part of the measuring rod 9m, one end of the compression spring 9c contacts the step surface of the step through hole 9n, and the other end contacts the measuring head 9b;

[0131] A support rod 9g arranged horizontally and extending toward the dial indicator touch plate 9j is arranged on the dial indicator support 9f, and the dial indicator 9i is arranged at the end of the support rod 9g away from the dial indicator support 9f, and the head of the dial indicator 9i is in contact with the dial indicator touch plate 9j.

[0132] The part numbers of small holes, large holes and stepped surfaces are not shown in the attached drawings; the dial indicator 9i can be purchased externally.

[0133] The grinding mechanism 11 includes a vertically movable base 11h, a horizontally arranged linear guide rail 11a, a slider 11b matched with the linear guide rail 11a, a horizontally movable base 11e, two clamps 11d, an angle grinder 11c, an adjusting nut 11f, a spring 11g, and a horizontally arranged connecting screw 11i;

[0134] The direction in which the vertical movable base 11h and the horizontal movable base 11e are close to the closed end of the rotating frame 10 is set as the front, and the direction in which the vertical movable base 11h and the horizontal movable base 11e are away from the closed end of the rotating frame 10 is set as the rear;

[0135] The vertical movable base 11h and the horizontal movable base 11e are both in a horizontal L-shape. The vertical movable base 11h includes a first front section 11ha and a first rear section 11hb connected front and back at an angle of 90 degrees. The horizontal movable base 11e includes a second front section 11ea and a second rear section 11eb connected front and back at an angle of 90 degrees. The first rear section 11hb and the second rear section 11eb both extend in a direction away from the rotating frame 10.

[0136] The two precision slide blocks 13 on the other side of the rotating frame 10 in the thickness direction are connected to the first front section 11ha of the vertical movable base 11h close to the inner side of the rotating frame 10;

[0137] The linear guide rail 11a is disposed on the first front section 11ha of the vertical movable base 11h away from the outer side of the rotating frame 10 and parallel to the rotating frame 10;

[0138] The front part of the second front section 11ea of ​​the horizontal moving base 11e is closely connected to the slider 11b, a plurality of clamps 11d are connected to the outer side of the second front section 11ea of ​​the horizontal moving base 11e away from the rotating frame 10, and the angle grinder 11c is arranged on the outer side of the second front section 11ea of ​​the horizontal moving base 11e away from the rotating frame 10 through the plurality of clamps 11d;

[0139] The connecting screw 11i passes through the first rear section 11hb of the vertical movable base 11h and is threadedly connected with the second rear section 11eb of the horizontal movable base 11e. The connecting screw 11i is located between the first rear section 11hb and the second rear section 11eb, and a spring 11g and an adjusting nut 11f are respectively mounted on the rod body. Both ends of the spring 11g are in contact with the first rear section 11hb and the adjusting nut 11f.

[0140] Each clamp 11d includes a horizontally arranged U-shaped clamp 11da, a locking screw 11db vertically penetrating the open end of the U-shaped clamp 11da, and two butterfly nuts 11dc respectively screwed on the upper and lower ends of the locking screw 11db and in contact with the open end of the U-shaped clamp 11da, and the closed end of the U-shaped clamp 11da is fixedly connected to the second front section 11ea of ​​the horizontal movable base 11e away from the outer side of the rotating frame 10. The structure of the clamp 11d is simple and reasonable, and the clamping effect is good.

[0141] The angle grinder 11c can be purchased from outside.

[0142] The indicator light 9d uses a plurality of LED lamp beads connected in parallel, and a 5# battery is installed in the battery box 9e.

[0143] The grinding tool of the angle grinder 11c is an alloy grinding disc.

[0144] The above is only one embodiment of the method and the device. It should be noted that, for those skilled in the art, obvious modifications and improvements can be made without departing from the principle of the method and the device, and these should also be considered to belong to the protection scope of the method and the device.

Claims

1. A method for replacing the petals of a runner chamber of a vertical turbine unit comprises the following steps: S1 New Wheel Chamber Production: The new runner chamber is made of stainless steel plate and hot rolled. It is in the shape of a cylinder with open upper and lower sides. After eliminating stress according to conventional technology, several horizontally arranged annular ribs are installed on its outer cylindrical surface. The height and outer diameter of the new runner chamber refer to the design parameters of the original runner chamber. The thickness of the stainless steel plate is based on the thickness of the original runner chamber plus the grinding allowance. S2 new rotor chamber petal cutting: 1) The new runner chamber should be divided into at least three petals, and the chord length of each petal should be smaller than the inner diameter of the original runner chamber. The inner and outer petal dividing lines should be on the same longitudinal cutting plane passing through the center line of the new runner chamber. 2) Weld three connection components on both sides of each outer petal line in the circumferential direction and along the height direction of the new runner chamber. The three connection components are respectively located at the upper side, middle part and lower side in the height direction of the new runner chamber. Each connection component includes two connection pieces symmetrically arranged along the circumferential direction of the corresponding outer petal line. Each connection piece is respectively welded to the outer cylindrical surface of the new runner chamber and the upper side surface of the annular rib. Each connection component is first positioned with a positioning pin and then fastened with bolts; 3) Cut along each inner petal line to divide the new runner chamber longitudinally into at least three petal bodies; 4) Tighten the bolts in sequence to tightly connect and combine at least three petal bodies after cutting; S3 processes the combined petal body: The inner cylindrical surface of the assembled petal body is processed by lathe, and the inner cylindrical error of each petal body is controlled to be less than 2mm, and the maximum inner diameter is less than the design value of the original runner chamber, and a first supporting channel steel is welded on the upper and lower sides of each petal body; Preparation before installing the S4 split body: Build a working platform with all safety protection measures in place inside the original runner room; dismantle the original runner room according to the size of the new runner room, and chisel away the concrete around the original runner room to the required pouring space; drill a number of grouting holes on the guide blade bottom ring connected to the upper side of the original runner room in the vertical turbine unit, the grouting holes are connected to the pouring space, the distance between two adjacent grouting holes is less than one meter, and the pouring space is flushed with water; S5 installation split body: 1) First, remove the bolts of each connection assembly, and successively hoist at least three petal bodies into the installation position of the original runner chamber. Any two adjacent petal bodies are matched according to the positioning pins, and the bolts of the corresponding connection assemblies are tightened, and then the new runner chamber is connected again, so that the inner and outer cylindrical surfaces of the new runner chamber form at least three vertically arranged seams in the circumferential direction; after checking the inner diameter deviation value of the new runner chamber, the new runner chamber is horizontally moved to expose the seams of the outer cylindrical surface respectively, and the seams are welded from the outer cylindrical surface in turn, so that the new runner chamber is in place, and then the first supporting channel steel on each petal body is removed; 2) With the center line of the guide blade bottom ring and the tailwater pipe in the vertical turbine unit as the reference, adjust the center and level of the new runner chamber to meet the design requirements; after the above adjustment is completed, the upper and lower sides of the new runner chamber are spot welded to the guide blade bottom ring and the tailwater pipe in the vertical turbine unit respectively, and four welding points are evenly distributed circumferentially on the upper and lower sides of the new runner chamber. After welding is completed, measure the center and level of the new runner chamber. If the deviation is greater than the design requirements, remove the welding points, adjust them, and then re-weld them. The welding should be performed symmetrically; 3) After the new runner chamber has been in use for 12 hours, recheck the corresponding parameters of its centering and horizontality; if the above two parameters are normal, weld a second supporting channel steel for connection at the corresponding position between the upper side and the lower side of each two adjacent petal bodies; if the above two parameters are abnormal, repeat the step 2) of S5 to install the petal bodies until the above two parameters are normal, and then weld a second supporting channel steel for connection at the corresponding position between the upper side and the lower side of each two adjacent petal bodies; Finally, complete the welding of each seam of the inner cylindrical surface of the new runner chamber, and the welding should also be done symmetrically; S6 grouting: Use commercially available non-shrinkage cement grouting material to sequentially grout through the above-mentioned several grouting holes; during grouting, two people operate, one person grouts, and the other uses a vibration pump to extend from the adjacent grouting hole into the grouting area to vibrate repeatedly to ensure that the grouting is dense; several grouting holes are grouted in turn and circulated until grout is discharged from the adjacent grouting holes; after the grouting is completed, several grouting holes are blocked; after 72 hours, the second supporting channel steel between the upper side and the lower side of each two adjacent petal bodies is removed, the new runner chamber is cleaned, and each weld and each welding point is polished and flushed; S7 measuring and grinding new wheel chamber: 1) According to the height of the new runner chamber, use a commercially available laser theodolite to set several horizontal cross sections for horizontal measurement on the inner wall of the new runner chamber, with at least 16 measurement points evenly distributed around the circumference of each horizontal cross section; 2) Install two cross-shaped brackets of the runner chamber measuring and polishing device at corresponding positions above and below the new runner chamber, respectively, and weld the two cross-shaped brackets to the guide vane bottom ring and the tailwater pipe respectively; then install a vertically arranged rotating shaft between the central areas of the two cross-shaped brackets, and adjust the axis of the rotating shaft to coincide with the above-mentioned central connecting line based on the central connecting line of the guide vane bottom ring and the tailwater pipe in the vertical turbine unit; finally, complete the installation of the runner chamber measuring and polishing device, and adjust the setting value of the measuring rod of the measuring mechanism in the runner chamber measuring and polishing device according to the designed inner diameter of the new runner chamber; 3) Use the above-mentioned measuring mechanism to measure point by point and record the data of each measuring point; for areas where the inner diameter is smaller than the design value range, use the grinding mechanism in the wheel chamber measuring and grinding device to grind; for areas where the inner diameter is larger than the design value range, first fill it with stainless steel welding rods and then use the above-mentioned grinding mechanism to grind; when grinding, use a ruler and arc template to check the cylindricity and roundness; measurement and grinding should be repeated and continued until the inner diameter, cylindricity and roundness of the new wheel chamber meet the requirements; 4) Remove the runner chamber measuring and polishing device, check whether the center line of the new runner chamber, the guide blade bottom ring and the center line of the tailwater pipe are in line, and clean up the replacement site of the new runner chamber. The replacement of the runner chamber of the vertical turbine unit is completed; The wheel chamber measuring and polishing device comprises two horizontally arranged cross-shaped brackets spaced apart from each other, a vertically arranged rotating shaft, two horizontally arranged flange bearings, two sets of horizontally arranged adjustment members spaced apart from each other, a vertically arranged rotating frame, two horizontally arranged limit studs spaced apart from each other, four vertically arranged precision linear guide rails, four vertically arranged precision slide blocks, a horizontally arranged measuring mechanism, and a horizontally arranged polishing mechanism. A flange bearing and a set of adjusting parts for aligning the flange bearing are provided in the central area of ​​each cross-shaped bracket, each set of adjusting parts includes four groups of adjusting bolts evenly distributed along the circumference of the cross-shaped bracket, each group of adjusting bolts passes through the cross-shaped bracket and is threadedly connected to the cross-shaped bracket, and the threaded end of each group of adjusting bolts contacts the outer cylindrical surface of the flange bearing; The rotating shaft is arranged between the central areas of the two cross-shaped brackets after the upper and lower ends of the rotating shaft are correspondingly plugged into the two flange bearings; The rotating frame is a horizontal U-shaped flat frame, and the open end of the rotating frame is arranged on the rotating shaft through two limit studs; Two precision linear guide rails spaced apart and parallel to each other are installed on each side of the closed end of the rotating frame in the thickness direction, and each precision linear guide rail is provided with a precision sliding block matched therewith; Two precision slide blocks on one side of the rotating frame in the thickness direction are connected to the inner side of the measuring mechanism close to the rotating frame, and two precision slide blocks on the other side of the rotating frame in the thickness direction are connected to the inner side of the grinding mechanism close to the rotating frame, so that the measuring mechanism is located on one side of the rotating frame in the thickness direction, and the grinding mechanism is located on the other side of the rotating frame in the thickness direction, and the measuring mechanism and the grinding mechanism both extend along the length direction of the rotating frame; When the runner chamber measuring and grinding device is installed with the vertical turbine unit: The installation position of the cross-shaped bracket on the upper side is higher than the new runner chamber in the vertical turbine unit, and the installation position of the cross-shaped bracket on the lower side is lower than the new runner chamber. The new runner chamber is in a non-contact state with the two cross-shaped brackets respectively, and the two cross-shaped brackets are respectively welded to the guide blade bottom ring and the tailwater pipe in the vertical turbine unit; Through two sets of adjustment parts, the axis of the rotating shaft is made to coincide with the center line of the new runner chamber and the flange bearing is positioned; The measuring head of the measuring mechanism and the grinding head of the angle grinder of the grinding mechanism are both pointed to the inner wall of the new wheel chamber; The measuring mechanism includes a nylon seat, a measuring rod, a measuring head, a compression spring, a limit nut, a dial indicator touch plate, a clamping nut, an indicator light, a battery box, a dial indicator support, a support rod, and a dial indicator; The nylon seat and measuring rod are arranged horizontally; The nylon seat is a rectangular parallelepiped with a horizontal step through hole inside. The length of the nylon seat is shorter than the length of the measuring rod. Two precision slide blocks on one side of the rotating frame in the thickness direction are connected to the inner side of the nylon seat close to the rotating frame. Set the direction of the nylon seat, the step through hole, and the measuring rod close to the closed end of the rotating frame as the front, and set the direction of the nylon seat, the step through hole, and the measuring rod away from the closed end of the rotating frame as the back; The measuring rod is connected to the nylon seat by means of a step through hole, and both ends of the measuring rod are located outside the nylon seat. The rear of the measuring rod is provided with an external thread, and the measuring rod is electrically insulated from the rotating frame through the nylon seat. The step through hole is composed of a small hole and a large hole which are connected front and back and have a coaxial line, and an annular step surface is formed between the small hole and the large hole; The indicator lights, battery box and dial indicator support which are spaced in sequence from front to back are arranged on the outside of the nylon base away from the rotating frame; The measuring head is arranged at the front end of the measuring rod, the limit nut in contact with the rear end of the nylon seat is arranged at the middle of the measuring rod, and the dial indicator touch plate arranged vertically and extending toward the outside of the nylon seat is arranged at the rear end of the measuring rod by means of a clamping nut screwed with the measuring rod; The compression spring is sleeved on the front part of the measuring rod, one end of the compression spring contacts the step surface of the step through hole, and the other end contacts the measuring head; A support rod arranged horizontally and extending toward the dial gauge touch plate is arranged on the dial gauge support, the dial gauge is arranged at the end of the support rod away from the dial gauge support, and the dial gauge head is in contact with the dial gauge touch plate; The indicator light uses a number of LED lamp beads connected in parallel, and a 5# battery is installed in the battery box; The grinding mechanism includes a vertically movable base, a horizontally arranged linear guide rail, a slider matched with the linear guide rail, a horizontally movable base, a plurality of clamps, an angle grinder, an adjusting nut, a spring, and a horizontally arranged connecting screw; Set the direction of the vertical movable base and the horizontal movable base close to the closed end of the rotating frame as the front, and set the direction of the vertical movable base and the horizontal movable base away from the closed end of the rotating frame as the rear; The vertical movable base and the horizontal movable base are both in a horizontal L-shape, the vertical movable base includes a first front section and a first rear section connected front and back at an angle of 90 degrees, and the horizontal movable base includes a second front section and a second rear section connected front and back at an angle of 90 degrees, and the first rear section and the second rear section both extend in a direction away from the rotating frame; Two precision slide blocks on the other side of the rotating frame in the thickness direction are connected to the inner side of the first front section of the vertical movable base close to the rotating frame; The linear guide rail is arranged at the first front section of the vertical movable base away from the outer side of the rotating frame and parallel to the rotating frame; The front part of the second front section of the horizontal movable base is fitted and connected with the slider, a plurality of clamps are connected with the outer side of the second front section of the horizontal movable base away from the rotating frame, and the angle grinder is arranged on the outer side of the second front section of the horizontal movable base away from the rotating frame through the plurality of clamps; The connecting screw passes through the first rear section of the vertical movable base and is threadedly connected with the second rear section of the horizontal movable base. A spring and an adjusting nut are respectively mounted on the rod body of the connecting screw between the first rear section and the second rear section, and both ends of the spring are in contact with the first rear section and the adjusting nut. The grinding tool of the angle grinder adopts alloy grinding disc.

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