Magnetic ring stator blade provided with deviation prevention structure and used for steam turbine

Abstract

The utility model relates to the technical field of steam turbines, in particular to a steam turbine magnetic ring stator blade with an anti-deviation structure, which comprises a fixed wheel, a blade, a mounting ring, a partition block and the like. At least ten blades are inserted into the outer wall of the fixed wheel at intervals, the same mounting ring is inserted into the sides, away from the fixed wheel, of the blades, clamping grooves are formed in the front side and the rear side of the mounting ring, and at least eleven partition blocks are connected to the outer wall of the side, away from the blades, of the mounting ring at intervals. The blade fixing device is provided with the separation blocks, the fixing plates, the clamping blocks and the first connecting springs, the number of the fixing plates is the same as that of the blades, the part, inserted into the mounting ring, of each blade is located between every two adjacent separation blocks, and the fixing plates and the mounting ring are fixed through the clamping blocks and the first connecting springs; and the clamping block is moved to not fix the fixing plate any more, so that the damaged blade can be detached independently, the operation is simple and convenient, and the detaching efficiency of the magnetic ring stator blade is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbines, in particular to a magnetic ring stator blade for a steam turbine provided with an anti-deviation structure. Background Art

[0002] The stator blades in a steam turbine, also known as guide vanes or fixed blades, are one of the key components inside the turbine, responsible for guiding the flow of steam and converting its thermal energy into kinetic energy. The magnetic ring stator blade is a specially designed stator blade that integrates a ring structure made of magnetic material on the basis of a traditional stator blade. The application of magnetic rings is intended to improve the performance and efficiency of steam turbines. Through the interaction between the magnetic rings and the turbine moving blades, mechanical wear can be reduced, noise can be reduced, and the stability of the steam flow field can be improved. In addition, the magnetic ring can also be used to monitor the status of the blades, such as by detecting changes in the magnetic field to sense whether the blades are vibrating or displacing, thereby realizing real-time monitoring of the health of the equipment.

[0003] According to the patent authorization publication number CN216788488U, a magnetic ring stator blade for a steam turbine with an anti-deflection structure is disclosed, comprising: a guide vane outer ring and a guide vane inner ring, and stator blades inserted into the guide vane outer ring and the guide vane inner ring, and further comprising: an outer blade hole, the outer blade hole being annularly provided in the middle of the outer wall of the guide vane outer ring; an inner blade hole, the inner blade hole being annularly provided in the middle of the outer wall of the guide vane inner ring, the inner blade hole corresponding to the outer blade hole; a fixing belt, the fixing belt being sleeved in the middle of the outer wall of the guide vane outer ring; and stator blades inserted into the inner side of the outer blade hole and the inner blade hole, the inner wall of the fixing belt abutting against one end face of the stator blade connected to the outer blade hole. The above patent fixes all the stator blades by squeezing the fixing belt. When the stator blades are damaged, all the stator blades can only be removed at once, which is not convenient when a single stator blade is damaged and needs to be replaced. Utility Model Content

[0004] In order to overcome the disadvantage of the above patent that it is inconvenient to operate when replacing the stator blades, the purpose of the utility model is to provide a magnetic ring stator blade for a steam turbine with an anti-deflection structure that can replace a single stator blade.

[0005] A magnetic ring stationary blade for a steam turbine with an anti-deflection structure includes a fixed wheel, blades, a mounting ring, a spacer block, a fixed plate, a clamping block and a first connecting spring. At least ten blades are plugged and connected to the outer wall of the fixed wheel at intervals. The side of the blade away from the fixed wheel is plugged and connected to the same mounting ring. Clamping grooves are provided on the front and rear sides of the mounting ring. At least eleven spacer blocks are connected to the outer wall of the side of the mounting ring away from the blade. Fixed plates are slidably connected between adjacent spacer blocks. Blocks adapted to the clamping grooves are slidably connected to the front and rear sides of the fixed plate. The sides of the front and rear clamping blocks close to each other are connected to the first connecting spring, and the first connecting springs are connected to the fixed plate.

[0006] Furthermore, the sides of the front and rear clamping blocks that are away from each other are both inclined surfaces.

[0007] Furthermore, it also includes a first top block and a second connecting spring. The first top blocks are slidably connected to the left and right sides of the fixed plate, and the second connecting spring is connected between the first top block and the fixed plate.

[0008] Furthermore, it also includes a second top block, a fixed ring and a connecting ring. The second top blocks are slidably connected to the front and rear sides of the mounting ring. The second top blocks are located in the card slot. The front and rear sides of the mounting ring are connected to the fixed ring. The connecting ring is rotatably connected to the fixed ring. A wedge-shaped groove is opened on the side of the connecting ring close to the card slot.

[0009] Furthermore, it also includes connecting blocks and limiting blocks. The fixing ring is connected to at least ten groups of limiting blocks, with each group having two limiting blocks. The connecting ring is connected to at least ten connecting blocks, with the connecting block located between two limiting blocks in each group.

[0010] Furthermore, a pull rod is included, and at least one pull rod is connected to the front and rear sides of the connecting ring.

[0011] The beneficial effects are as follows: the utility model is provided with a partition block, a fixed plate, a clamping block and a first connecting spring. The number of the fixed plates is the same as the number of blades. The part of each blade inserted into the mounting ring is located between two adjacent partition blocks. The fixing plate and the mounting ring are fixed by the clamping block and the first connecting spring. When a single blade is damaged, the clamping block is moved so that it no longer fixes the fixed plate, so that the damaged blade can be removed individually. The operation is simple and convenient, which improves the disassembly efficiency of the static blades of the magnetic ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0013] Figure 2 This is a cross-sectional view of the mounting ring and fixing plate of the present invention.

[0014] Figure 3 It is a schematic diagram of the three-dimensional structure of the fixing ring, connecting ring and connecting block of the utility model.

[0015] Figure 4 It is a structural schematic diagram of the clamping block, the first connecting spring and the second top block of the present invention.

[0016] In the above drawings: 1-fixed wheel, 2-blade, 3-mounting ring, 31-partition block, 4-fixed plate, 5-slot, 6-block, 7-first connecting spring, 8-first top block, 9-second connecting spring, 10-second top block, 11-fixed ring, 12-connecting ring, 121-wedge groove, 13-connecting block, 14-limiting block, 15-pull rod. DETAILED DESCRIPTION

[0017] The technical solution of the present utility model will be further described below with reference to the accompanying drawings.

[0018] A steam turbine magnetic ring stator blade with an anti-deflection structure, such as Figure 1-Figure 4 As shown, it includes a fixed wheel 1, blades 2, a mounting ring 3, a separator 31, a fixing plate 4, a clamping block 6, a first connecting spring 7, a first top block 8 and a second connecting spring 9. Twelve blades 2 are evenly spaced and plugged into the outer wall of the fixed wheel 1. The blades 2 are plugged into the same mounting ring 3 on the side away from the fixed wheel 1. The mounting ring 3 has a clamping groove 5 on both the front and rear sides. Thirteen separators 31 are evenly spaced and fixedly connected to the outer wall of the mounting ring 3 on the side away from the blades 2. The part of each blade 2 inserted into the mounting ring 3 is located between two adjacent separators 31. Adjacent separators 31 A fixing plate 4 is slidably connected between them, and the fixing plates 4 are engaged with the mounting ring 3. The front and rear sides of the fixing plate 4 are slidably connected with a card block 6 adapted to the card slot 5. The sides of the front and rear card blocks 6 away from each other are both inclined surfaces, and the sides of the front and rear card blocks 6 away from the fixed wheel 1 extend out of the mounting ring 3. The sides of the front and rear card blocks 6 close to each other are fixedly connected with a first connecting spring 7, and the first connecting spring 7 is fixedly connected to the fixing plate 4. The two sides of the fixing plate 4 away from the card block 6 are slidably connected with a first top block 8, and a second connecting spring 9 is fixedly connected between the first top block 8 and the fixing plate 4.

[0019] like Figure 1 、 Figure 3 and Figure 4 As shown, it also includes a second top block 10, a fixing ring 11, a connecting ring 12, a connecting block 13, a limit block 14 and a pull rod 15. The front and rear sides of the mounting ring 3 are slidably connected to the second top block 10, and the second top block 10 is located in the card slot 5. The front and rear sides of the mounting ring 3 are fixedly connected to the fixing ring 11, and the connecting ring 12 is rotatably connected to the fixing ring 11. The connecting ring 12 is provided with a wedge-shaped groove 121 on the side close to the card slot 5. The front and rear fixing rings 11 are fixedly connected to eleven groups of limit blocks 14 on the sides away from each other, and the number of limit blocks 14 in each group is two. The front and rear connecting rings 12 are fixedly connected to eleven connecting blocks 13 on the sides away from each other, and the eleven connecting blocks 13 are respectively located between the two limit blocks 14 in each group. The front and rear connecting rings 12 are fixedly connected to two pull rods 15 on the sides away from each other.

[0020] Initially, the first connecting spring 7 and the second connecting spring 9 are both in normal state, one of the limiting blocks 14 in each group is close to the wedge-shaped groove 121, and the connecting block 13 contacts the limiting block 14 close to the wedge-shaped groove 121. When installing the blade 2, the blade 2 is inserted through the mounting ring 3, and then the blade 2 is inserted on the fixed wheel 1, and the fixing plate 4 is moved between the two adjacent partition blocks 31. During this process, the inclined surfaces of the front and rear clamping blocks 6 squeeze the mounting ring 3, and the front and rear clamping blocks 6 slide close to each other, so that the front and rear first connecting springs 7 are compressed. When the front and rear clamping blocks 6 move close to the clamping groove 5, The first connecting spring 7 is restored to its original state so that the front and rear clamping blocks 6 slide into the clamping slot 5, the second connecting spring 9 is compressed, and the first top block 8 is in close contact with the mounting ring 3, so that the fixing plate 4 can be fixed by clamping the clamping block 6 in the clamping slot 5, and then the blade 2 can be fixed by the fixing plate 4 to improve the stability of the blade 2. Repeating the above steps can fix all the blades 2 on the mounting ring 3 and the fixing wheel 1. When a single blade 2 needs to be replaced, the front and rear clamping blocks 6 are moved away from the clamping slot 5, the first connecting spring 7 is compressed, and the second connecting spring 9 is restored to its original state so that the fixing plate 4 is away from the mounting ring 3, so that a single fixing plate 4 can be removed, and then a single blade 2 can be removed. When a single blade 2 is damaged, the damaged blade 2 can be removed separately according to the above disassembly steps. The operation is simple and convenient, and the disassembly efficiency of the magnetic ring static blade 2 is improved. When all blades 2 need to be removed, hold the pull rod 15 to rotate the connecting ring 12 counterclockwise, and the connecting block 13 rotates away from the limit block 14 in contact with it. The inclined surface of the wedge-shaped groove 121 squeezes the second top block 10, so that the second top block 10 slides into the card slot 5 to squeeze the card block 6, and the front and rear first connecting springs 7 are compressed, and the fixing plate 4 is not Then it is fixed by the clamping block 6, and the second connecting spring 9 returns to its original state to move the fixing plate 4 away from the mounting ring 3, and then all the blades 2 can be removed. At this time, the connecting block 13 contacts another limit block 14 in each group of limit blocks 14, so that all the fixing plates 4 can be removed at one time, thereby removing all the static blades 2 without manually removing the fixing plates 4 one by one, further improving the disassembly efficiency of the static blades 2 of the magnetic ring. After disassembly, the connecting ring 12 can be rotated clockwise to reset. The limit block 14 can prevent the connecting ring 12 from rotating too much and causing dislocation, which is conducive to the clockwise rotation of the connecting ring 12 to reset.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A magnetic ring stator blade for a steam turbine with an anti-deflection structure, comprising a fixed wheel (1), a blade (2) and a mounting ring (3), wherein at least ten blades (2) are plugged and connected to the outer wall of the fixed wheel (1) at intervals, and the side of the blade (2) away from the fixed wheel (1) is plugged and connected to the same mounting ring (3), wherein: The mounting ring (3) further comprises a spacer block (31), a fixing plate (4), a clamping block (6) and a first connecting spring (7). The mounting ring (3) is provided with a clamping groove (5) on both the front and rear sides. At least eleven spacer blocks (31) are connected to the outer wall of the mounting ring (3) away from the blade (2). Adjacent spacer blocks (31) are slidably connected to the fixing plate (4). The fixing plate (4) is slidably connected to the front and rear sides of the fixing plate (4). The first connecting spring (7) is connected to the side where the front and rear clamping blocks (6) are close to each other. The first connecting spring (7) is connected to the fixing plate (4).

2. A steam turbine magnetic ring stator blade with an anti-deflection structure according to claim 1, characterized in that: The sides of the front and rear clamping blocks (6) that are away from each other are both inclined surfaces.

3. A steam turbine magnetic ring stator blade with an anti-deflection structure according to claim 2, characterized in that: It also includes a first top block (8) and a second connecting spring (9), both sides of the fixed plate (4) away from the clamping block (6) are slidably connected to the first top block (8), and the second connecting spring (9) is connected between the first top block (8) and the fixed plate (4).

4. A steam turbine magnetic ring stator blade with an anti-deflection structure according to claim 3, characterized in that: The mounting ring (3) further comprises a second top block (10), a fixing ring (11) and a connecting ring (12). The second top block (10) is slidably connected to the front and rear sides of the mounting ring (3). The second top block (10) is located in the card slot (5). The front and rear sides of the mounting ring (3) are connected to the fixing ring (11). The fixing ring (11) is rotatably connected to the connecting ring (12). A wedge-shaped groove (121) is provided on one side of the connecting ring (12) close to the card slot (5).

5. A steam turbine magnetic ring stator blade with an anti-deflection structure according to claim 4, characterized in that: It also includes a connecting block (13) and a limiting block (14), wherein at least ten groups of limiting blocks (14) are connected to the fixing ring (11), and the number of limiting blocks (14) in each group is two, and at least ten connecting blocks (13) are connected to the connecting ring (12), and the connecting block (13) is located between two limiting blocks (14) in each group.

6. A steam turbine magnetic ring stator blade with an anti-deflection structure according to claim 5, characterized in that: It also includes a pull rod (15), and at least one pull rod (15) is connected to both the front and rear sides of the connecting ring (12).

Images