Braking device to prevent reverse rotation of induced draft fan due to failure

Abstract

The present invention discloses a brake device for preventing a induced draft fan from reversing due to a fault, and specifically relates to the field of brake and braking technology, including a bracket, a sleeve frame, a concave frame, and a peripheral synchronous embedded brake mechanism, and also includes a lateral synchronous meshing brake mechanism and a timely calibration detection component; wherein the peripheral synchronous embedded brake mechanism includes a reduction motor, a rotating shaft, a driving gear, a driven gear, a rotating ring, a linkage ring, a positioning ring, a brake wheel, a docking shaft, a plurality of anti-reversal grooves, and a plurality of inclined sliding frames. The present invention has the advantages of embedding braking on the external plurality of anti-reversal grooves of the brake wheel through the peripheral synchronous embedded brake mechanism, and quickly performing braking, and better braking timeliness, thereby solving the problem that once the torque force of the shaft body reversal is greater than the braking friction force, the reversal problem will still occur, and it is difficult to brake in time to achieve rapid anti-reversal braking, and the braking timeliness is poor.

Description

Technical Field

[0001] The present invention relates to the technical field of brakes, and more particularly to a brake device for preventing an induced draft fan from reversing due to a fault. Background Art

[0002] The induced draft fan of a power station boiler is generally designed for the parallel operation of two-sided fans. When the dragging end of a single-sided induced draft fan fails, the gate valve is not flexible and not tightly closed, causing the fan on the other side to fail. The speed of the fan decelerates from high-speed rotation to a stationary state and then reverses. When the induced draft fan reverses, when the induced draft fan with the fault eliminated is restarted, the starting current is too large and the start fails. If the reversed fan cannot be stopped and the fan cannot be restarted, the operation of the boiler will be affected. The general method is to suppress the fire of the boiler and restart the furnace after the fan stops running. The suppression of the boiler causes the steam pressure to decrease, which seriously leads to the cessation of alumina production and the decoupling of the generator, which has a very serious impact on production. Therefore, it is necessary to brake quickly to prevent reversal.

[0003] In the existing public documents, the patent announcement number CN219888563U discloses a brake device for a boiler induced draft fan, which can adjust and squeeze the angle and position of the side plate and the connecting plate when in use, so that the side plate and the connecting plate can be clamped and squeezed inward at the same time, completing the positioning and braking of the fan part, preventing the fan from reversing, making the use of the equipment itself more convenient, improving the overall work quality, and can also quickly and stably install or replace the side plate and the connecting plate, speeding up the speed of the component's own maintenance and replacement, and can greatly reduce the cost of the equipment when in use, ensuring the stability of the equipment during operation. However, this technology still has the following problems.

[0004] When the brake device brakes the induced draft fan due to a fault, it mainly relies on the clamping friction force generated to contact the shaft to brake. During the clamping friction of this braking method, the clamping friction is small at first, and the braking friction will continue to increase with the continuous squeezing distance. Once the torque force of the shaft reversal is greater than the braking friction force, a reversal problem will still occur. It is difficult to brake in time to achieve rapid anti-reversal braking, and the timeliness of braking is poor. Therefore, a brake device is needed to prevent the induced draft fan from reversing due to a fault. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides the following technical solutions: a brake device for preventing the reverse rotation of the induced draft fan due to a fault, comprising a bracket, a sleeve frame and a concave frame, wherein the sleeve frame is fixedly connected to the top of the bracket, and the concave frame is fixedly connected to the top of the sleeve frame, and a peripheral synchronous embedded brake mechanism is installed at one end of the concave frame; the peripheral synchronous embedded brake mechanism comprises a reduction motor fixedly connected to one end of the concave frame, and the output end of the reduction motor is fixedly connected to a rotating shaft, and the outer wall of the rotating shaft is fixedly connected to a driving gear;

[0006] The outer wall of the driving gear is meshingly connected with a driven gear, a rotating ring is fixedly connected to one side of the driven gear, and a linkage ring is fixedly connected to one side of the rotating ring. The inner wall of the linkage ring is rotatably connected with a positioning ring, a brake wheel is provided inside the positioning ring, a docking shaft is fixedly connected to the inner wall of the brake wheel, and a plurality of anti-reversal grooves are provided on the outer wall of the brake wheel, and a plurality of inclined sliding frames are fixedly connected to the outer wall of the linkage ring; a lateral synchronous meshing brake mechanism is provided on the upper surface of the sleeve; and a timely calibration detection component is provided on one side of the brake wheel.

[0007] Preferably, a plurality of the anti-reversal grooves are arranged in a circular ring with equal intervals, a plurality of the inclined slide frames are arranged in a circular ring with equal intervals, the inner walls of the plurality of inclined slide frames are smooth surfaces, the inner wall of each of the inclined slide frames is slidably connected to a sliding shaft, and a guide pressure shaft is fixedly connected to one end of the sliding shaft; the outer walls of the plurality of guide pressure shafts are slidably connected to the positioning ring, and a brake plug is fixedly connected to one end of each guide pressure shaft, and the brake plug is used to be inserted into the anti-reversal groove, both sides of the linkage ring are rotatably connected to limit rings, and the two limit rings are symmetrically arranged about the linkage ring; the two limit rings are fixedly connected to the positioning ring, one end of the rotating shaft is fixedly connected to a torque sensor, and the torque sensor is used to sense the torque of the rotating shaft; the torque sensor is fixedly connected to the concave frame.

[0008] When this technology is in use, the reduction motor drives the shaft to rotate, the shaft rotates the driving gear, the driven gear drives the rotating ring to rotate clockwise, the linkage ring rotates clockwise between the two limit rings, the linkage ring drives multiple inclined slide frames to rotate clockwise, and the slide shaft slides along the inside of the inclined slide frame. The guide pressure shaft approaches the center point of the brake wheel along the inside of the positioning ring, and the guide pressure shaft drives the brake plug to approach the center point of the brake wheel. Multiple brake plugs can simultaneously embed and brake the periphery of the brake wheel, that is, embed and brake the multiple anti-reversal grooves on the outside of the brake wheel, and brake quickly.

[0009] Preferably, the lateral synchronous meshing brake mechanism comprises an arc-shaped sleeve plate fixedly arranged on the upper surface of the sleeve frame; the inner wall of the arc-shaped sleeve plate is slidably connected with a guide column, and one end of the guide column is fixedly connected with an extrusion ring; the inner wall of the sleeve frame is slidably connected with a sliding rod, and one end of the sliding rod is installed with a pressure sensor, and the pressure sensor and the extrusion ring are both fixedly connected to the sliding rod. An electric cylinder is installed on one side of the pressure sensor, and the output end of the electric cylinder is fixedly connected to the pressure sensor, and a support plate is fixedly connected to one side of the electric cylinder, and the support plate is fixedly connected to the sleeve frame; a plurality of brake racks are fixedly connected to one side of the extrusion ring, a plurality of guide racks are provided on one side of the brake rack, a support ring is provided on one side of the guide rack, and the plurality of guide racks are fixedly connected to the support ring, and the support ring is fixedly connected to the brake wheel, the outer wall of the sliding rod and the inner wall of the sleeve frame are both smooth surfaces, and the support plate is used to support the electric cylinder. The plurality of brake racks are arranged in a circular ring with equal spacing, and a gap is provided between two adjacent guide racks.

[0010] When this technology is in use, the electric cylinder pushes the pressure sensor to move right, the pressure sensor drives the sliding rod to move right, the sliding rod drives the extrusion ring to move right, the guide column slides right along the inner wall of the arc sleeve, and the extrusion ring drives multiple brake racks to move right. The multiple brake racks are respectively in contact with the multiple guide racks, so that the brake racks are respectively squeezed in the gaps between the multiple guide racks, and the multiple brake racks can stably squeeze the multiple guide racks. When the pressure value sensed by the pressure sensor is the same as the pressure value set by the controller, the electric cylinder is closed by the controller.

[0011] Preferably, the timely calibration detection assembly includes two limit support rings arranged on one side of the brake wheel; a sleeve shaft block is rotatably connected between the two limit support rings, the two limit support rings are fixedly connected to the docking shaft, one end of the docking shaft is fixedly connected to a main speed sensor, and the bottom end of the main speed sensor is fixedly connected to a reinforcement frame;

[0012] The bottom end of the reinforcement frame is equipped with a mounting plate, and the mounting plate is fixedly connected to the positioning ring, the sleeve shaft block and the reinforcement frame are both fixedly connected to the mounting plate, and a controller fixedly connected to the mounting plate is provided below the reinforcement frame; a linkage gear is fixedly connected to the outer wall of the docking shaft and close to the position of the main speed sensor, and a sensing gear is meshingly connected to the outer wall of the linkage gear, and the inner wall of the sensing gear is fixedly connected to the sensing shaft, one side of the sensing gear is rotatably connected to a sleeve shaft frame, and the sleeve shaft frame is rotatably connected to the sensing shaft; one end of the sensing shaft is fixedly connected to a secondary speed sensor, and the outer wall of the secondary speed sensor is fixedly connected to a connecting frame, the connecting frame and the reinforcement frame are both fixedly connected to the sleeve shaft frame, the two limit support rings are symmetrically arranged about the sleeve shaft block, and the outer wall of the sleeve shaft block is a smooth surface.

[0013] When this technology is in use, when the transmission shaft of the induced draft fan drives the docking shaft to rotate clockwise, the docking shaft drives the two limit support rings to rotate clockwise, the docking shaft rotates on the main speed sensor, the docking shaft drives the linkage gear to rotate, the linkage gear drives the sensing gear to mesh and rotate, the sensing shaft rotates stably inside the sleeve shaft frame, the auxiliary speed sensor can sense the speed of the sensing shaft, and the sleeve shaft frame supports the connecting frame. When the speed value sensed by the auxiliary speed sensor is zero, and the speed sensed by the main speed sensor is zero, the docking shaft has a reverse failure.

[0014] Technical effects and advantages of the present invention:

[0015] 1. The present invention embeds a braking mechanism synchronously on the periphery. The reduction motor drives the rotating shaft to rotate. The rotating shaft causes the driving gear to rotate, and the driven gear drives the rotating ring to rotate clockwise. The linkage ring rotates clockwise between the two limit rings, and the inclined sliding frame drives the sliding shaft to approach the center point of the brake wheel, and the guide pressure shaft approaches the center point of the brake wheel. The guide pressure shaft drives the brake plug to approach the center point of the brake wheel. Multiple brake plugs can be embedded in the periphery of the brake wheel at the same time, that is, embedded braking can be achieved in multiple anti-reverse grooves on the outside of the brake wheel, and the brake can be quickly braked. The mechanism can brake in time to achieve rapid anti-reverse braking, and the timeliness of the brake is better.

[0016] 2. The present invention uses a lateral synchronous meshing braking mechanism. The electric cylinder pushes the pressure sensor to move right. The pressure sensor drives the sliding rod to move right. The sliding rod slides right along the inner wall of the sleeve frame. The guide column slides right along the inner wall of the arc-shaped sleeve plate. Multiple brake racks respectively contact multiple guide racks, so that the brake racks are respectively squeezed in the interval gaps of the multiple guide racks. The multiple brake racks can stably squeeze the multiple guide racks. When the pressure value sensed by the pressure sensor is the same as the pressure value set by the controller, the electric cylinder is turned off by the controller, and the side of the brake wheel is immediately braked quickly to prevent the brake wheel from reversing due to a malfunction.

[0017] 3. The present invention utilizes timely calibration and detection components. The transmission shaft of the induced draft fan drives the docking shaft to rotate clockwise, and the docking shaft drives the two limit support rings to rotate clockwise. At the same time, the docking shaft rotates on the main speed sensor, and the docking shaft drives the linkage gear to rotate. The linkage gear drives the sensing gear to mesh and rotate, and the sensing gear drives the sensing shaft to rotate. The auxiliary speed sensor can sense the speed of the sensing shaft. When the speed value sensed by the auxiliary speed sensor is zero and the speed sensed by the main speed sensor is zero, it can be timely known that the induced draft fan has a reverse problem.

[0018] Through the interaction of the above multiple effects, firstly, when the speed value sensed by the auxiliary speed sensor is zero and the speed sensed by the main speed sensor is zero, the reverse rotation problem of the induced draft fan can be known in time, and then multiple brake plugs can be embedded and braked on the periphery of the brake wheel at the same time, and finally the brake racks are squeezed in the intervals of multiple guide racks respectively. In summary, the brake can be braked quickly, the anti-reverse brake can be performed immediately, and the timeliness of the brake is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The figure is a schematic diagram of the overall structure of the brake device for preventing the induced draft fan from reversing due to a fault according to the present invention.

[0020] Figure 2 The cross-sectional structure diagram of the brake device for preventing the induced draft fan from reversing due to a fault is shown in the present invention.

[0021] Figure 3 It is a schematic diagram of the partial structure of the cross section of the connection between the driven gear and the rotating ring of the present invention.

[0022] Figure 4 The vertical cross-sectional structure diagram of the brake device for preventing the induced draft fan from reversing due to a fault is shown in the present invention.

[0023] Figure 5 For the present invention Figure 4 Enlarged structural diagram at A in the middle.

[0024] Figure 6 The figure is a side structural schematic diagram of the brake device for preventing the induced draft fan from reversing due to a fault according to the present invention.

[0025] Figure 7 The present invention is a schematic diagram of the structure of a brake device for preventing a induced draft fan from reversing due to a fault, viewed from above.

[0026] Figure 8 For the present invention Figure 6 Enlarged structural diagram at B in the middle.

[0027] Fig. 9 It is a schematic diagram of the partial structure of the front view of the connection between the brake rack and the extrusion ring of the present invention.

[0028] Fig.10 It is a schematic diagram of the partial structure of the connection between the mounting plate and the reinforcement frame of the present invention.

[0029] The accompanying drawings are marked as follows: 1, bracket; 2, concave frame; 3, reduction motor; 4, rotating shaft; 5, driving gear; 6, driven gear; 7, rotating ring; 8, linkage ring; 9, positioning ring; 10, brake wheel; 11, docking shaft; 12, anti-reversal groove; 13, inclined sliding frame; 14, sliding shaft; 15, guide pressure shaft; 16, brake plug; 17, limit ring; 18, torque sensor; 19, sleeve frame; 20, arc sleeve plate; 21, guide column; 22 , extrusion ring; 23, sliding rod; 24, pressure sensor; 25, electric cylinder; 26, support plate; 27, brake rack; 28, guide rack; 29, support ring; 30, limit support ring; 31, main speed sensor; 32, reinforcement frame; 33, mounting plate; 34, controller; 35, sleeve shaft block; 36, linkage gear; 37, sensor gear; 38, sensor shaft; 39, sleeve shaft frame; 40, connecting frame; 41, auxiliary speed sensor. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0031] As attached Figure 1-10 A braking device for preventing an induced draft fan from reversing due to a fault is shown. The braking device for preventing an induced draft fan from reversing due to a fault is provided with a peripheral synchronous embedded braking mechanism, a lateral synchronous meshing braking mechanism, and a timely proofreading detection component. The settings of each mechanism and component can quickly perform braking, immediately perform anti-reverse braking, and brake more timely. The specific structural settings of each mechanism and component are as follows.

[0032] In this embodiment, as shown in the attached Figure 1-5As shown, the peripheral synchronous embedded brake mechanism includes a reduction motor 3 fixedly connected to one end of the concave frame 2, and the output end of the reduction motor 3 is fixedly connected to a rotating shaft 4, and the outer wall of the rotating shaft 4 is fixedly connected to a driving gear 5; the outer wall of the driving gear 5 is meshingly connected to a driven gear 6, and a rotating ring 7 is fixedly connected to one side of the driven gear 6, and a linkage ring 8 is fixedly connected to one side of the rotating ring 7. The inner wall of the linkage ring 8 is rotatably connected to a positioning ring 9, and a brake wheel 10 is provided inside the positioning ring 9. The inner wall of the brake wheel 10 is fixedly connected to a docking shaft 11, and the outer wall of the brake wheel 10 is provided with a plurality of anti-reversal grooves 12, and the outer wall of the linkage ring 8 is fixedly connected to a plurality of inclined sliding frames 13; the upper surface of the sleeve 19 is provided with a lateral synchronous meshing brake mechanism; one side of the brake wheel 10 is provided with a timely calibration detection component.

[0033] In this embodiment, as shown in the attached Figure 3-5 As shown, the inner wall of each inclined sliding frame 13 is slidably connected with a sliding shaft 14, and a guide pressing shaft 15 is fixedly connected to one end of the sliding shaft 14;

[0034] The outer walls of multiple guide pressure shafts 15 are slidably connected to the positioning ring 9, and one end of each guide pressure shaft 15 is fixedly connected to a brake plug 16, which is used to be inserted into the anti-reversal groove 12, so that the inclined slide frame 13 can drive the slide shaft 14 to approach the center point of the brake wheel 10, and the slide shaft 14 slides along the inclined slide frame 13. At the same time, the guide pressure shaft 15 approaches the center point of the brake wheel 10, the guide pressure shaft 15 approaches the center point of the brake wheel 10 along the inside of the positioning ring 9, and the brake plug 16 approaches the center point of the brake wheel 10. The brake block 16 is inserted into the anti-reversal groove 12 on the brake wheel 10 to achieve timely braking.

[0035] The two sides of the linkage ring 8 are rotatably connected to the limit rings 17, and the two limit rings 17 are symmetrically arranged about the linkage ring 8; the two limit rings 17 are fixedly connected to the positioning ring 9, so that the linkage ring 8 can rotate clockwise between the two limit rings 17, and the two limit rings 17 can limit the rotation of the linkage ring 8, and stably realize the limit rotation of the linkage ring 8. A torque sensor 18 is fixedly connected to one end of the rotating shaft 4, and the torque sensor 18 is used to sense the torque of the rotating shaft 4; the torque sensor 18 is fixedly connected to the concave frame 2, so that when the torque value sensed by the torque sensor 18 is the same as the torque value set by the controller 34, the reduction motor 3 is turned off by the controller 34.

[0036] In this embodiment, as shown in the attached Figure 6-9As shown, the lateral synchronous meshing braking mechanism includes an arc-shaped sleeve plate 20 fixedly arranged on the upper surface of the sleeve frame 19; the inner wall of the arc-shaped sleeve plate 20 is slidably connected with a guide column 21, and one end of the guide column 21 is fixedly connected with an extrusion ring 22, the inner wall of the sleeve frame 19 is slidably connected with a sliding rod 23, and one end of the sliding rod 23 is installed with a pressure sensor 24, and the pressure sensor 24 and the extrusion ring 22 are fixedly connected to the sliding rod 23.

[0037] An electric cylinder 25 is installed on one side of the pressure sensor 24, and the output end of the electric cylinder 25 is fixedly connected to the pressure sensor 24, a support plate 26 is fixedly connected to one side of the electric cylinder 25, and the support plate 26 is fixedly connected to the sleeve frame 19; a plurality of brake racks 27 are fixedly connected to one side of the extrusion ring 22, a plurality of guide racks 28 are provided on one side of the brake rack 27, a support ring 29 is provided on one side of the guide rack 28, a plurality of guide racks 28 are fixedly connected to the support ring 29, and the support ring 29 is fixedly connected to the brake wheel 10. The outer wall of the sliding rod 23 and the inner wall of the sleeve frame 19 are both smooth surfaces, the support plate 26 is used to support the electric cylinder 25, a plurality of brake racks 27 are arranged in a circular ring with equal spacing, and a gap is provided between two adjacent guide racks 28.

[0038] In this embodiment, as shown in the attached Fig.10 As shown, the timely proofreading and detecting assembly includes two limit support rings 30 arranged on one side of the brake wheel 10; a sleeve shaft block 35 is rotatably connected between the two limit support rings 30, and the two limit support rings 30 are fixedly connected to the docking shaft 11, one end of the docking shaft 11 is fixedly connected to a main speed sensor 31, and the bottom end of the main speed sensor 31 is fixedly connected to a reinforcement frame 32.

[0039] A mounting plate 33 is installed at the bottom end of the reinforcement frame 32, and the mounting plate 33 is fixedly connected to the positioning ring 9, the sleeve shaft block 35 and the reinforcement frame 32 are fixedly connected to the mounting plate 33, and a controller 34 fixedly connected to the mounting plate 33 is provided below the reinforcement frame 32; a linkage gear 36 is fixedly connected to the outer wall of the docking shaft 11 and close to the main speed sensor 31, a sensing gear 37 is meshingly connected to the outer wall of the linkage gear 36, and a sensing shaft 38 is fixedly connected to the inner wall of the sensing gear 37, a sleeve shaft frame 39 is rotatably connected to one side of the sensing gear 37, and the sleeve shaft frame 39 and the sensing shaft 38 are rotatably connected.

[0040] One end of the sensing shaft 38 is fixedly connected to a secondary speed sensor 41, and the outer wall of the secondary speed sensor 41 is fixedly connected to a connecting frame 40, and the connecting frame 40 and the reinforcing frame 32 are both fixedly connected to the sleeve shaft frame 39. The two limit support rings 30 are symmetrically arranged about the sleeve shaft block 35, and the outer wall of the sleeve shaft block 35 is a smooth surface.

[0041] The working principle of the brake device for preventing the induced draft fan from reversing due to a fault is as follows:

[0042] Step 1: During docking installation, dock the docking shaft 11 on the drive shaft of the induced draft fan to fix the docking shaft 11 to the drive shaft of the induced draft fan. Then, insert the bolts into the holes of the mounting plate 33 to fix the mounting plate 33 to the platform. In this way, the mounting plate 33 supports the sleeve shaft block 35, and the sleeve shaft block 35 supports the docking shaft 11. At the same time, the mounting plate 33 supports the reinforcement frame 32, and the reinforcement frame 32 supports the main speed sensor 31. The sleeve shaft block 35 can be stably limited through two limit support rings 30 to achieve limit operation.

[0043] Step 2: During the timely calibration and inspection, when the transmission shaft of the induced draft fan drives the docking shaft 11 to rotate clockwise, the docking shaft 11 drives the brake wheel 10 to rotate clockwise, and the docking shaft 11 drives the two limit support rings 30 to rotate clockwise, and the two limit support rings 30 rotate clockwise on the sleeve shaft block 35. At the same time, the mounting plate 33 stably supports the sleeve shaft block 35, and the sleeve shaft block 35 can stably rotate the docking shaft 11.

[0044] At the same time, the docking shaft 11 rotates on the main speed sensor 31, and the mounting plate 33 supports the reinforcement frame 32, and the reinforcement frame 32 supports the main speed sensor 31. At the same time, the docking shaft 11 drives the linkage gear 36 to rotate, and the linkage gear 36 drives the sensing gear 37 to mesh and rotate, and the sensing gear 37 drives the sensing shaft 38 to rotate. The sensing shaft 38 rotates stably inside the sleeve shaft frame 39, and the reinforcement frame 32 also provides stable support force for the sleeve shaft frame 39. When the secondary speed sensor 41 can sense the speed of the sensing shaft 38, and the sleeve shaft frame 39 supports the connecting frame 40, and the connecting frame 40 supports the secondary speed sensor 41, when the speed value sensed by the secondary speed sensor 41 is zero, and the speed sensed by the main speed sensor 31 is zero, the docking shaft 11 has a reverse failure, and the reduction motor 3 is started through the controller 34.

[0045] Step three, when the peripheral synchronous embedded braking is performed, the reduction motor 3 drives the rotating shaft 4 to rotate, and the rotating shaft 4 causes the driving gear 5 to rotate. At the same time, the mounting plate 33 supports the bracket 1, the bracket 1 supports the sleeve 19, the sleeve 19 supports the concave frame 2, and the concave frame 2 supports the reduction motor 3. The driving gear 5 drives the driven gear 6 to rotate clockwise, and the driven gear 6 drives the swivel 7 to rotate clockwise. The swivel 7 causes the linkage ring 8 to rotate clockwise, and the linkage ring 8 rotates clockwise between the two limit rings 17, and the two limit rings 17 can limit the rotation of the linkage ring 8.

[0046] The linkage ring 8 drives the multiple inclined slide frames 13 to rotate clockwise, and the inclined slide frames 13 drive the slide shaft 14 to approach the center point of the brake wheel 10, and the slide shaft 14 slides inside the inclined slide frame 13. At the same time, the guide pressure shaft 15 approaches the center point of the brake wheel 10, and the guide pressure shaft 15 approaches the center point of the brake wheel 10 along the inside of the positioning ring 9, and the guide pressure shaft 15 drives the brake plug 16 to approach the center point of the brake wheel 10, and the brake plug 16 is inserted into the anti-reversal groove 12 on the brake wheel 10, so that the multiple brake plugs 16 can simultaneously perform embedded braking on the periphery of the brake wheel 10, that is, the multiple anti-reversal grooves 12 outside the brake wheel 10 can be embedded and braked, and the brake can be quickly braked, so that the brake wheel 10 cannot reverse due to a fault. At the same time, the torque sensor 18 senses the torque of the rotating shaft 4. When the torque value sensed by the torque sensor 18 is the same as the torque value set by the controller 34, the reduction motor 3 is turned off by the controller 34, and the reduction motor 3 can rotate and squeeze the rotating shaft 4 according to the specified torque.

[0047] Step 4, during lateral synchronous engagement braking, the sleeve frame 19 supports the arc sleeve plate 20 at the same time, and the sleeve frame 19 supports the support plate 26, the support plate 26 supports the electric cylinder 25, the electric cylinder 25 pushes the pressure sensor 24 to move right, the pressure sensor 24 drives the sliding rod 23 to move right, the sliding rod 23 slides to the right along the inner wall of the sleeve frame 19, and the sliding rod 23 drives the extrusion ring 22 to move right, the extrusion ring 22 makes the guide column 21 move right, the guide column 21 slides to the right along the inner wall of the arc sleeve plate 20, so that the extrusion ring 22 moves to the right stably.

[0048] At the same time, the squeezing ring 22 drives the multiple brake racks 27 to move rightward, and the multiple brake racks 27 contact the multiple guide racks 28 respectively. The support ring 29 is supported by the brake wheel 10, and the support ring 29 supports the multiple guide racks 28, so that the brake racks 27 are squeezed in the intervals between the multiple guide racks 28 respectively, and the multiple brake racks 27 can stably squeeze the multiple guide racks 28. The pressure sensor 24 performs pressure sensing at the output end of the electric cylinder 25. When the pressure value sensed by the pressure sensor 24 is the same as the pressure value set by the controller 34, the electric cylinder 25 is closed by the controller 34, so that the multiple brake racks 27 can squeeze and limit the multiple guide racks 28 according to the specified pressure, and the brake wheel 10 can be braked immediately to prevent the brake wheel 10 from reversing due to a fault.

[0049] The contents not described in detail in the specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used. In this technical solution, the electrical control components not mentioned are not shown in the figure because they belong to the prior art and will not be described here.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A brake device for preventing an induced draft fan from reversing due to a fault, comprising a bracket (1), a sleeve bracket (19) and a concave bracket (2), wherein the sleeve bracket (19) is fixedly connected to the top end of the bracket (1), and the concave bracket (2) is fixedly connected to the top end of the sleeve bracket (19), and characterized in that: One end of the concave frame (2) is equipped with a peripheral synchronous embedding brake mechanism; The peripheral synchronous embedded braking mechanism comprises a reduction motor (3) fixedly connected to one end of the concave frame (2), and the output end of the reduction motor (3) is fixedly connected to a rotating shaft (4), and the outer wall of the rotating shaft (4) is fixedly connected to a driving gear (5); The outer wall of the driving gear (5) is meshingly connected to a driven gear (6), a rotating ring (7) is fixedly connected to one side of the driven gear (6), and a linkage ring (8) is fixedly connected to one side of the rotating ring (7); The inner wall of the linkage ring (8) is rotatably connected to a positioning ring (9), a brake wheel (10) is provided inside the positioning ring (9), the inner wall of the brake wheel (10) is fixedly connected to a docking shaft (11), and the outer wall of the brake wheel (10) is provided with a plurality of anti-reversal grooves (12), the outer wall of the linkage ring (8) is fixedly connected to a plurality of inclined sliding frames (13), the inner wall of each inclined sliding frame (13) is slidably connected to a sliding shaft (14), and a sliding shaft (14) is fixedly connected to one end of the sliding shaft (14). A guide pressure shaft (15); the outer walls of the plurality of guide pressure shafts (15) are slidably connected to the positioning ring (9); one end of each guide pressure shaft (15) is fixedly connected to a brake plug (16), and the brake plug (16) is used to be inserted into the anti-reversal groove (12); both sides of the linkage ring (8) are rotatably connected to limit rings (17), and the two limit rings (17) are symmetrically arranged with respect to the linkage ring (8); the two limit rings (17) are fixedly connected to the positioning ring (9); The upper surface of the sleeve frame (19) is provided with a lateral synchronous meshing brake mechanism; A timely calibration and detection component is provided on one side of the brake wheel (10).

2. The brake device for preventing the induced draft fan from reversing due to a fault according to claim 1 is characterized in that: The plurality of anti-reversal grooves (12) are arranged in a circular ring at equal intervals, the plurality of inclined sliding frames (13) are arranged in a circular ring at equal intervals, and the inner walls of the plurality of inclined sliding frames (13) are all smooth surfaces.

3. The brake device for preventing the induced draft fan from reversing due to a fault according to claim 1 is characterized in that: One end of the rotating shaft (4) is fixedly connected to a torque sensor (18), and the torque sensor (18) is used to sense the torque of the rotating shaft (4); The torque force sensor (18) is fixedly connected to the concave frame (2).

4. The brake device for preventing the induced draft fan from reversing due to a fault according to claim 1 is characterized in that: The lateral synchronous meshing brake mechanism comprises an arc-shaped sleeve plate (20) fixedly arranged on the upper surface of the sleeve frame (19); The inner wall of the arc-shaped sleeve plate (20) is slidably connected to a guide column (21), and one end of the guide column (21) is fixedly connected to an extrusion ring (22); the inner wall of the sleeve frame (19) is slidably connected to a sliding rod (23), and one end of the sliding rod (23) is installed with a pressure sensor (24); the pressure sensor (24) and the extrusion ring (22) are both fixedly connected to the sliding rod (23); An electric cylinder (25) is installed on one side of the pressure sensor (24), and the output end of the electric cylinder (25) is fixedly connected to the pressure sensor (24); a support plate (26) is fixedly connected to one side of the electric cylinder (25), and the support plate (26) is fixedly connected to the sleeve frame (19); A plurality of brake racks (27) are fixedly connected to one side of the extrusion ring (22); a plurality of guide racks (28) are provided on one side of the brake rack (27); a support ring (29) is provided on one side of the guide rack (28); and the plurality of guide racks (28) are fixedly connected to the support ring (29); The support ring (29) is fixedly connected to the brake wheel (10).

5. The brake device for preventing the induced draft fan from reversing due to a fault according to claim 4 is characterized in that: The outer wall of the sliding rod (23) and the inner wall of the sleeve frame (19) are both smooth surfaces, and the support plate (26) is used to support the electric cylinder (25).

6. The brake device for preventing the induced draft fan from reversing due to a fault according to claim 4 is characterized in that: The plurality of brake racks (27) are arranged in a circular ring with equal spacing, and a gap is provided between two adjacent guide racks (28).

7. The brake device for preventing the induced draft fan from reversing due to a fault according to claim 1 is characterized in that: The timely calibration and detection assembly comprises two limit support rings (30) arranged on one side of the brake wheel (10); A sleeve shaft block (35) is rotatably connected between the two limit support rings (30), the two limit support rings (30) are fixedly connected to the docking shaft (11), one end of the docking shaft (11) is fixedly connected to a main speed sensor (31), and the bottom end of the main speed sensor (31) is fixedly connected to a reinforcement frame (32); A mounting plate (33) is mounted on the bottom end of the reinforcement frame (32), and the mounting plate (33) is fixedly connected to the positioning ring (9), the sleeve shaft block (35) and the reinforcement frame (32) are both fixedly connected to the mounting plate (33), and a controller (34) fixedly connected to the mounting plate (33) is provided below the reinforcement frame (32); A linkage gear (36) is fixedly connected to the outer wall of the docking shaft (11) near the position of the main speed sensor (31); a sensing gear (37) is meshingly connected to the outer wall of the linkage gear (36); a sensing shaft (38) is fixedly connected to the inner wall of the sensing gear (37); a sleeve shaft frame (39) is rotatably connected to one side of the sensing gear (37); and the sleeve shaft frame (39) and the sensing shaft (38) are rotatably connected; One end of the sensing shaft (38) is fixedly connected to a secondary speed sensor (41), and an outer wall of the secondary speed sensor (41) is fixedly connected to a connecting frame (40), and the connecting frame (40) and the reinforcement frame (32) are both fixedly connected to the sleeve shaft frame (39).

8. The brake device for preventing the induced draft fan from reversing due to a fault according to claim 7 is characterized in that: The two limiting support rings (30) are symmetrically arranged with respect to the sleeve shaft block (35), and the outer wall of the sleeve shaft block (35) is a smooth surface.

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