Air sealing device of rotary heat accumulating type air preheater

Abstract

The invention discloses a rotary heat accumulating type air preheater air sealing device, a heat accumulating type air preheater comprises an outer sleeve, a center cylinder, a radial sealing assembly and an axial sealing assembly, the two ends of the center cylinder are fixedly connected with sealing rings respectively, the center cylinder is fixedly connected with a plurality of radial partition plates, and the radial partition plates are fixedly connected with the outer sleeve. The outer side edge of the radial partition plate is connected with an axial sealing assembly, the upper side edge and the lower side edge of the radial partition plate are each provided with a radial sealing assembly, one end of each radial sealing assembly is connected with the periphery of the sealing ring, one side of the outer end of the sealing ring is rotationally connected with a ring sleeve plate, and the driving shaft is rotationally connected to the middle of the ring sleeve plate; a plurality of fan-shaped plates are fixedly connected to the peripheral edge of the annular sleeve plate, and one sides of the outer ends of the fan-shaped plates are fixedly connected with the inner wall of the outer sleeve. The invention aims to provide the air-tight sealing device of the air preheater, which has a good sealing effect, reduces friction loss, prolongs the service life of the device, and reduces the maintenance cost and complexity.

Description

Technical Field

[0001] The invention relates to the technical field of rotary air preheater sealing, in particular to a rotary heat storage air preheater gas sealing device. Background Art

[0002] With the continuous advancement of industrial technology and the improvement of energy utilization efficiency, air preheaters are increasingly used in combustion systems. The main function of an air preheater is to increase the temperature of the combustion air, thereby improving the combustion efficiency of the fuel, reducing fuel consumption and pollutant emissions. Traditional air preheaters usually adopt a fixed structure, but this structure has problems such as low heat exchange efficiency, large heat loss, and difficult maintenance. Therefore, a rotary regenerative air preheater came into being.

[0003] The rotary regenerative air preheater achieves efficient heat exchange between flue gas and air through the rotation of the internal rotor. The rotor includes multiple radial baffles, sealing rings, heat exchange units and other components, which drive the heat transfer between flue gas and air when rotating. However, during the rotation process, how to ensure efficient sealing and prevent leakage between flue gas and air is the main technical challenge faced by this type of device.

[0004] In the prior art, common sealing methods include sliding seals and brush seals. However, these methods often have problems such as poor sealing effect, large friction loss, and short service life. Especially in high temperature and high dust environment, the sealing material is easy to wear, resulting in reduced sealing performance, which in turn affects the overall efficiency and stability of the air preheater.

[0005] In view of the above problems, the present invention proposes an improved rotary regenerative air preheater gas sealing device. The device optimizes the structural design and adopts a combination of rolling seals and sealing brushes to significantly improve the sealing effect, thereby effectively solving the problems of large wear and poor sealing effect in the prior art. Summary of the invention

[0006] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide an air preheater gas sealing device with good sealing effect, reduced friction loss, increased device service life, and reduced maintenance cost and complexity.

[0007] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a rotary regenerative air preheater air sealing device, including a regenerative air preheater, the regenerative air preheater includes an outer sleeve, a center sleeve, a drive shaft, a ring sleeve plate, a fan plate, a radial sealing assembly, and an axial sealing assembly. The middle of the center sleeve is connected to the drive shaft, and both ends of the center sleeve are fixedly connected to sealing rings. A plurality of radial baffles are fixedly connected to the center sleeve between the sealing rings. The radial baffles are evenly spaced along the circumferential direction of the center sleeve. The radial baffles and the center sleeve are both rotatably connected in the outer sleeve. A heat exchange unit is arranged in the space surrounded by the outer sleeve, the radial partition and the central sleeve, the outer edge of the radial partition is connected with an axial sealing assembly, the axial sealing assembly is slidably connected to the inner wall of the outer sleeve, the upper and lower sides of the radial partition are respectively provided with radial sealing assemblies, one end of the radial sealing assembly is connected to the outer periphery of the sealing ring, one side of the outer end of the sealing ring is rotatably connected to a ring sleeve plate, the drive shaft is rotatably connected to the middle part of the ring sleeve plate, the outer peripheral edge of the ring sleeve plate is fixedly connected with a plurality of fan-shaped plates, one side of the outer end of the fan-shaped plates is respectively fixedly connected to the inner wall of the outer sleeve, and the radial sealing assemblies are respectively slidably connected to the fan plates; In the present invention, the outer sleeve is the outer shell of the entire air preheater, which is used to fix and support the device. The central tube is the inner bearing part, which is connected to the drive shaft and can drive the internal rotor (the rotor includes radial partitions, sealing rings, heat exchange units and other components) to rotate. The ring sleeve plate cooperates with the outer sleeve to support and fix the fan plate. The sealing ring is fixedly connected to both ends of the central tube to ensure the sealing of the device during the rotation of the rotor. The radial partition is used to divide the heat exchange unit, ensure the distribution and guidance of the flue gas flow and the air flow, and provide support for the heat exchange unit. The axial sealing assembly and the inlet sealing assembly are respectively arranged on the outer peripheral edge of the radial partition to improve the sealing between the radial partition and other components and ensure the sealing when the flue gas and air flow.

[0008] In the above technical scheme, the radial sealing assembly includes a mounting plate and a sealing plate, a mounting plate is arranged on the radial partition on one side of the rotation direction, a first sealing brush is arranged on the upper end of the mounting plate, a sealing plate is arranged on the other side of the radial partition, a buffer plate is connected to one side of the sealing plate, a fixed plate is connected to one side of the buffer plate, a movable plate is rotatably connected to the upper end of the fixed plate, a rolling seal is fixedly connected to the upper end of the movable plate, a spring member is connected to the lower end of the movable plate, the lower end of the spring member is fixedly connected to the support plate, one side of the support plate is fixedly connected to the fixed plate, a plurality of reinforcing ribs are fixedly connected between the lower end surface of the support plate and the fixed plate; a plurality of first pressure plates are arranged on the outer side surface of the fixed plate, a plurality of second pressure plates are arranged on the outer side surface of the mounting plate, the second pressure plates respectively correspond to the first pressure plates, and a first bolt sequentially penetrates the first pressure plate, the fixed plate, the buffer plate, the sealing plate, the radial partition, the mounting plate and the second pressure plate and is threadedly connected to the first nut.

[0009] In the above technical solution, the spring component includes an upper rotating support, a lower rotating support, a telescopic rod, and a coil spring. One side of the lower end of the movable plate is fixedly connected to the upper rotating support, one side of the upper end of the support plate is fixedly connected to the lower rotating support, a telescopic rod is fixedly connected between the upper rotating support and the lower rotating support, and a coil spring is sleeved on the telescopic rod. One end of the coil spring is in conflict with the upper rotating support, and the other end of the coil spring is in conflict with the lower rotating support.

[0010] In the above technical scheme, the rolling seal includes a rolling frame, a fixed shaft, a rotating bearing, an isolation disk, and a spring sheet. The upper end of the movable plate is connected to a plurality of evenly arranged rolling frames. The second bolt passes through the movable plate and the rolling frame in sequence and is threadedly connected to the second nut. A rotating groove is provided on the rolling frame. A fixed shaft is fixedly connected in the rotating groove. A plurality of isolation disks are fixedly connected to the fixed shaft. Rotating bearings are respectively connected to the fixed shafts on both sides of the isolation disk. Rotating wheels are fixedly connected to the outer periphery of the rotating bearings. The rotating wheels are respectively rotatably connected to the fan-shaped plates. Spring sheets are fixedly connected between the two adjacent groups of rolling frames by screws. The middle cross-section of the spring sheet is an S-shaped corrugation. The end cross-section of the spring sheet is a circular arc structure, and the outer arc surface of the circular arc structure is slidably connected to the fan-shaped plate.

[0011] In the above technical solution, the first sealing brush includes a clamping plate, a third bolt, a third nut, a fourth bolt, a fourth nut, and a first steel wire rope. The edges of the upper end of the mounting plate are respectively connected to the clamping plates on both sides. The third bolt passes through the clamping plate and the mounting plate in sequence and is threadedly connected to the third nut. A plurality of first steel wire ropes stacked in layers are connected between the clamping plates at the upper end of the mounting plate. One end of the first steel wire rope passes through the clamping plate to form a bristle structure, which is in contact with the fan-shaped plate. The fourth bolt passes through the two groups of clamping plates and the first steel wire rope located in the middle and is threadedly connected to the fourth bolt.

[0012] In the above technical solution, the axial sealing assembly includes a second sealing brush, a brush handle, a third sealing brush, and a flexible steel sheet sealing brush. The second sealing brush is fixedly connected to the radial partition on one side of the rotation direction, and the brush handle is fixedly connected to the other side of the radial partition. The upper end of the brush handle is bent in a direction away from the radial partition, and the bending angle is 45°. The third sealing brush is connected to one side of the brush handle at the upper end of the bending portion, and the flexible steel sheet sealing brush is fixedly connected to the other side of the brush handle at the upper end of the bending portion.

[0013] In the above technical solution, the second sealing brush includes a first pressure cover, a second steel wire rope, a front bending pressure plate, and a rear bending pressure plate. The first pressure cover is connected to the radial partition located on one side of the rotation direction. A first mounting groove is provided on one side of the first pressure cover. A plurality of second steel wire ropes are stacked in layers in the first mounting groove. A rear bending pressure plate is connected to the notch of the first mounting groove. One side of the rear bending pressure plate conflicts with the second steel wire ropes stacked in layers, and the other side of the rear bending pressure plate conflicts with the radial partition. The upper end of the rear bending pressure plate passes through the first mounting groove and moves radially backward. It is bent toward the partition, and one end of the second steel wire rope passes through the installation groove to form a brush structure, which contacts the inner wall of the outer sleeve. A front bend pressure plate is fixedly connected to one side of the edge of the first pressure cover, and the upper end of the front bend pressure plate is bent toward the second steel wire rope, and the bending angle is 10°; a first pad is provided on one side of the brush handle, and a second pad is provided on one side of the outer end of the first pressure cover, and the fifth bolt passes through the first pad, the brush handle, the radial partition, the rear bend pressure plate, the second steel wire rope, the first pressure cover and the second pad in sequence, and is threadedly connected to the fifth nut.

[0014] In the above technical solution, the third sealing brush includes a second pressure cover, a third steel wire rope, and an extrusion plate. The second pressure cover is connected to one side of the upper end of the brush handle, and a second installation groove is opened on the second pressure cover facing the side of the brush handle. A plurality of third steel wire ropes are stacked in layers in the second installation groove, and an extrusion plate is connected to the groove mouth of the second installation groove. One side of the extrusion plate is in conflict with the third steel wire ropes stacked in layers, and the other side of the extrusion plate is in conflict with the brush handle. One end of the third steel wire rope passes through the second installation groove to form a brush structure, and the brush structure is in contact with the inner wall of the outer sleeve.

[0015] In the above technical scheme, the flexible steel sheet sealing brush includes flat steel, a thin plate, and a third pressure plate. The other side of the upper end of the brush handle is stacked and fixed in sequence with a thin plate and a flat steel. The outermost layer of the stacking structure always ends with a thin plate, and the third pressure plate is connected to the thin plate located on the outermost side. One side of the thin plate extends out of the flat steel to form a multi-layer brush strip, which contacts the inner side surface of the outer sleeve; the sixth bolt passes through the second pressure cover, the third steel wire rope, the extrusion plate, the stacking layer formed by the thin plate and the flat steel, and the third pressure plate in sequence, and is threadedly connected to the sixth nut.

[0016] In the above technical solution, the number of stacked layers of the first steel wire rope is more than two layers, the number of stacked layers of the second steel wire rope and the third steel wire rope are both more than three layers, and the first steel wire rope, the second steel wire rope and the third steel wire rope are all made of stainless steel; each group of thin plates is composed of more than two layers of stainless steel sheets, the number of thin plate groups is one group more than the number of flat steel groups, the number of flat steel groups is provided with more than three layers, and the flat steel and thin plates are arranged at intervals from each other.

[0017] Beneficial effects of the present invention: 1. Significantly improved sealing performance: The present invention adopts a structure combining rolling seals and sealing brushes by rationally designing radial seal components and axial seal components to effectively prevent leakage between smoke and air. Especially in high temperature and high pressure environments, the seals can maintain long-term stability, avoiding the leakage problems common in traditional sealing methods.

[0018] 2. Friction loss is greatly reduced: The rolling seal design uses rolling friction between the rotating wheel and the sealing plate instead of traditional sliding friction, effectively reducing friction loss and energy consumption. This design not only improves the working efficiency of the device, but also significantly extends the service life of the seal, thereby reducing maintenance frequency and operating costs.

[0019] 3. Modular design, easy maintenance: The modular design of this device makes the replacement and maintenance of sealing components easier. By replacing damaged rolling racks or seals, the equipment can be repaired quickly, reducing downtime, reducing maintenance costs and complexity, and improving the reliability and stability of the equipment.

[0020] 4. Long service life: The combination of rolling seal and sealing brush effectively extends the service life of the sealing system. Especially in high temperature, high pressure and strong corrosive environment, the durability of the seal is greatly improved, reducing the failure and equipment downtime caused by the wear of the sealing material.

[0021] 5. Improved durability and stability of the sealing system: The axial sealing component provides higher sealing strength and durability through the combination of multi-layer steel wire rope and stainless steel sheet. In addition, the use of flexible steel sheet sealing brush increases the flexibility of the sealing system, enabling it to adapt to slight deformation in long-term operation and maintain excellent sealing effect.

[0022] 6. Environmental benefits: The present invention effectively avoids the pollution to the environment caused by flue gas leakage, optimizes the heat exchange efficiency, and further improves the overall performance of the rotary thermal storage air preheater, thereby helping to reduce energy consumption and pollutant emissions, and meeting the requirements of modern industrial green production.

[0023] In summary, the present invention has not only achieved remarkable progress in terms of sealing performance, friction loss, service life, etc., but also improved the maintainability and environmental benefits of the equipment, and has broad application prospects and market value. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the heat storage air preheater of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the radial sealing assembly of the present invention; Figure 3 It is a schematic diagram of the connection structure between adjacent rolling seals of the present invention; Figure 4 for Figure 3 Schematic diagram of the structure of the A1 part; Figure 5 It is a schematic diagram of the spring member connection structure of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the first sealing brush of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the axial sealing assembly of the present invention; Figure 8 It is a schematic diagram of the cross-sectional structure of the second sealing brush of the present invention; Fig. 9 It is a schematic diagram of the cross-sectional connection structure of the third sealing brush and the flexible steel sheet sealing brush of the present invention.

[0025] In the figure: 1 outer sleeve, 2 center sleeve, 3 driving shaft, 4 ring sleeve plate, 5 fan-shaped plate, 6 radial sealing assembly, 7 axial sealing assembly, 8 sealing ring, 9 radial partition, 10 heat exchange unit, 601 mounting plate, 602 sealing plate, 603 first sealing brush, 604 buffer plate, 605 fixed plate, 606 movable plate, 607 rolling seal, 608 spring member, 609 support plate, 610 reinforcing rib, 611 first pressure plate, 612 second pressure plate, 613 first bolt, 614 first nut, 6071 rolling frame, 6072 fixed shaft, 6073 rotating bearing, 6074 isolation plate, 6075 spring sheet, 6076 second bolt, 6077 second nut, 6078 rotating groove, 6079 rotating wheel, 60710 screw, 6081 upper rotating support Seat, 6082 lower rotating support, 6083 telescopic rod, 6084 coil spring, 6031 clamping plate, 6032 third bolt, 6033 third nut, 6034 fourth bolt, 6035 fourth nut, 6036 first steel wire rope, 701 second sealing brush, 702 brush handle, 703 third sealing brush, 704 flexible steel sheet sealing brush, 7011 first pressure cover, 7012 second steel wire rope, 7013 front bending pressure plate, 7014 rear bending pressure plate, 7015 first pad, 7016 second pad, 7017 fifth bolt, 7018 fifth nut, 7031 second pressure cover, 7032 third steel wire rope, 7033 extrusion plate, 7041 flat steel, 7042 thin plate, 7043 third pressure plate, 7044 sixth bolt, 7045 sixth nut. DETAILED DESCRIPTION

[0026] 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.

[0027] See also Figure 1-Figure 9A rotary regenerative air preheater gas sealing device comprises a regenerative air preheater, the regenerative air preheater comprises an outer sleeve 1, a central sleeve 2, a driving shaft 3, a ring sleeve plate 4, a fan plate 5, a radial sealing assembly 6, and an axial sealing assembly 7. The middle of the central sleeve 2 is connected to the driving shaft 3, and both ends of the central sleeve 2 are respectively fixedly connected to sealing rings 8. A plurality of radial baffles 9 are fixedly connected to the central sleeve 2 between the sealing rings 8. The radial baffles 9 are evenly spaced along the circumferential direction of the central sleeve 2. The radial baffles 9 and the central sleeve 2 are both rotatably connected in the outer sleeve 1. A heat exchange unit 10 is arranged in the space enclosed by the partition plate 9 and the central tube 2, an axial sealing assembly 7 is connected to the outer edge of the radial partition plate 9, and the axial sealing assembly 7 is slidably connected to the inner wall of the outer sleeve 1, and radial sealing assemblies 6 are respectively arranged on the upper and lower sides of the radial partition plate 9, one end of the radial sealing assembly 6 is connected to the outer periphery of the sealing ring 8, and the outer end of the sealing ring 8 is rotatably connected to the ring plate 4, the driving shaft 3 is rotatably connected to the middle of the ring plate 4, and the outer peripheral edge of the ring plate 4 is fixedly connected to a plurality of fan-shaped plates 5, and the outer end of the fan-shaped plates 5 is respectively fixedly connected to the inner wall of the outer sleeve 1, and the radial sealing assemblies 6 are respectively slidably connected to the fan plates 5; In the present invention, the outer sleeve 1 is the outer shell of the entire air preheater, which is used to fix and support the device. The central tube 2 is the inner bearing part, which is connected to the drive shaft 3 and can drive the internal rotor (the rotor includes radial partitions 9, sealing rings 8, heat exchange units 10 and other components) to rotate. The ring plate 4 cooperates with the outer sleeve 1 to support and fix the fan plate 5. The sealing ring 8 is fixedly connected to both ends of the central tube 2 to ensure the sealing of the device during the rotation of the rotor. The radial partition 9 is used to divide the heat exchange unit 10, ensure the distribution and guidance of the flue gas flow and the air flow, and provide support for the heat exchange unit 10. The axial sealing assembly 7 and the inlet sealing assembly are respectively arranged on the outer peripheral edge of the radial partition 9 to improve the sealing between the radial partition 9 and other components and ensure the sealing when the flue gas and air flow.

[0028] See also Figure 2-Figure 6In one embodiment of the present invention, the radial sealing assembly 6 includes a mounting plate 601 and a sealing plate 602. The mounting plate 601 is arranged on the radial partition plate 9 on one side of the rotation direction. The upper end of the mounting plate 601 is provided with a first sealing brush 603. The first sealing brush 603 realizes the sealing effect with the fan-shaped plate 5 through the brush structure formed by the wire rope. The other side of the radial partition plate 9 is provided with a sealing plate 602. The upper end of the sealing plate 602 is as close to the fan-shaped plate 5 as possible, so that the relative sealing effect is achieved through the obstruction of the sealing plate 602. The sealing plate 602 is connected to a buffer plate 604 on one side, and the buffer plate 604 is connected to a fixed plate 605 on one side. The fixed plate 605 The upper end is rotatably connected to a movable plate 606, and a rolling seal 607 is fixedly connected to the upper end of the movable plate 606. The sealing effect with the fan-shaped plate 5 is achieved by a plurality of rotating wheels 6079 rotating side by side, and the rotating wheel 6079 and the sealing plate 602 are in a rolling connection, which can reduce the friction loss of the device and thus increase the service life of the device. In addition, the fan surface of the fan-shaped plate 5 gradually increases the friction length of the seal from the central tube 2 to the outside, and the friction loss between the inner ring and the outer ring can be reduced as much as possible through rolling friction, thereby increasing the service life of the device. The lower end of the movable plate 606 is connected to a spring member 608, and the spring member 608 is used to provide a rated pressure to ensure that the rotating wheel 6079 and the sealing plate 602 are in a rolling connection. The fan-shaped plate 5 is in close contact, thereby ensuring the sealing effect of the device. The lower end of the spring member 608 is fixedly connected to the support plate 609, and one side of the support plate 609 is fixedly connected to the fixed plate 605. A plurality of reinforcing ribs 610 are fixedly connected between the lower end surface of the support plate 609 and the fixed plate 605; a plurality of first pressing plates 611 are arranged on the outer side surface of the fixed plate 605, and a plurality of second pressing plates 612 are arranged on the outer side surface of the mounting plate 601, and the second pressing plates 612 correspond to the first pressing plates 611 respectively. The first bolt 613 passes through the first pressing plate 611, the fixed plate 605, the buffer plate 604, the sealing plate 602, the radial partition plate 9, the mounting plate 601 and the second pressing plates in sequence. The plate 612 is threadedly connected with the first nut 614 at the rear; the spring member 608 includes an upper rotating support 6081, a lower rotating support 6082, a telescopic rod 6083, and a coil spring 6084. The upper rotating support 6081 is fixedly connected to one side of the lower end of the movable plate 606, and the lower rotating support 6082 is fixedly connected to one side of the upper end of the support plate 609. The telescopic rod 6083 is fixedly connected between the upper rotating support 6081 and the lower rotating support 6082. The coil spring 6084 is sleeved and connected on the telescopic rod 6083. One end of the coil spring 6084 conflicts with the upper rotating support 6081, and the other end of the coil spring 6084 conflicts with the lower rotating support 6082.The rolling seal 607 includes a rolling frame 6071, a fixed shaft 6072, a rotating bearing 6073, an isolation disk 6074, and a spring sheet 6075. The upper end of the movable plate 606 is connected to a plurality of evenly arranged rolling frames 6071. The second bolt 6076 passes through the movable plate 606 and the rolling frame 6071 in sequence and is threadedly connected to the second nut 6077. The rolling frame 6071 is provided with a rotating groove 6078. The rotating groove 6078 is fixedly connected to the fixed shaft 6072. A plurality of isolation disks 6074 are fixedly connected to the fixed shaft 6072. The rotating bearings 6073 are respectively connected to the fixed shafts 6072 on both sides of the isolation disks 6074. 073, the outer periphery of the rotating bearing 6073 is fixedly connected with a rotating wheel 6079, and the rotating wheels 6079 are respectively rotatably connected to the sector plate 5. A spring sheet 6075 is fixedly connected between two adjacent groups of rolling frames 6071 through screws 60710. The middle section of the spring sheet 6075 is an S-shaped corrugation, and the end section of the spring sheet 6075 is an arc structure, and the outer arc surface of the arc structure is slidably connected to the sector plate 5; the first sealing brush 603 includes a clamping plate 6031, a third bolt 6032, a third nut 6033, a fourth bolt 6034, a fourth nut 6035, a first steel wire rope 6036, and a mounting plate 601 The edges of the ends are respectively connected with clamping plates 6031, the third bolt 6032 passes through the clamping plates 6031 and the mounting plate 601 in sequence and is threadedly connected with the third nut 6033, a plurality of first steel wire ropes 6036 stacked in layers are connected between the clamping plates 6031 at the upper end of the mounting plate 601, one end of the first steel wire rope 6036 passes through the clamping plate 6031 to form a bristle structure, which contacts the fan-shaped plate 5, the fourth bolt 6034 passes through the two groups of clamping plates 6031 and passes through the first steel wire rope 6036 located in the middle and is threadedly connected with the fourth bolt 6034, in this embodiment, the radial sealing component 6 is mainly connected through The radial baffle 9 is relatively sealed on both sides of the radial direction by the rolling seal 607 and the first sealing brush 603. The rolling seal 607 realizes the sealing function by a plurality of radially arranged rotating wheels 6079. Compared with the prior art, the rolling design can reduce the sliding friction with the sector plate 5, and can greatly extend the service life of the seal. The rotating wheels 6079 are respectively rotatably connected to a plurality of rolling racks 6071. The device can be repaired by replacing a damaged corresponding rolling rack 6071, which reduces the maintenance time and cost. In addition, the sealing performance of the radial baffle 9 is further improved by the first sealing brush 603. ;

[0029] See also Figure 7-9In one embodiment of the present invention, the axial sealing assembly 7 includes a second sealing brush 701, a brush handle 702, a third sealing brush 703, and a flexible steel sheet sealing brush 704. The second sealing brush 701 is fixedly connected to the radial partition plate 9 on one side of the rotation direction. The second sealing brush 701 forms a relative sealing effect through a brush structure formed by a second steel wire rope 7012. The other side of the radial partition plate 9 is fixedly connected to the brush handle 702. The upper end of the brush handle 702 is bent in a direction away from one side of the radial partition plate 9, and the bending angle is 45°. The third sealing brush 703 is connected to one side of the brush handle 702 at the upper end of the bending portion. The third The sealing brush 703 is a brush structure formed by a third steel wire rope 7032, which slides and rubs with the inner wall of the outer sleeve 1 to form an effective sealing structure, further improving the sealing performance of the device. A flexible steel sheet sealing brush 704 is fixedly connected to the other side of the brush handle 702 at the upper end of the bending portion. The flexible steel sheet brush is a thin plate 7042 composed of stainless steel sheets that slides and rubs with the inner wall of the outer sleeve 1 to form a sealing structure, further improving the relative sealing performance of the device and preventing smoke and air from leaking from each other. The second sealing brush 701 includes a first gland 7011, a second steel wire rope 7012, a front bending pressure plate 7013, and a rear bending pressure plate 70 14, a first gland 7011 is connected to the radial partition 9 located on one side of the rotation direction, a first installation groove is opened on one side of the first gland 7011, a plurality of second steel wire ropes 7012 are stacked in layers in the first installation groove, a rear bending pressure plate 7014 is connected to the notch of the first installation groove, one side of the rear bending pressure plate 7014 conflicts with the second steel wire ropes 7012 stacked in layers, and the other side of the rear bending pressure plate 7014 conflicts with the radial partition 9, the upper end of the rear bending pressure plate 7014 passes through the first installation groove and then bends toward the radial partition 9, one end of the second steel wire rope 7012 passes through the installation groove to form a brush structure, and the brush structure The structure contacts the inner wall of the outer sleeve 1, and a front bending pressure plate 7013 is fixedly connected to one side of the edge of the first pressure cover 7011, and the upper end of the front bending pressure plate 7013 is bent toward the second steel wire rope 7012, and the bending angle is 10°; a first pad 7015 is provided on one side of the brush handle 702, and a second pad 7016 is provided on one side of the outer end of the first pressure cover 7011, and a fifth bolt 7017 passes through the first pad 7015, the brush handle 702, the radial partition 9, the rear bending pressure plate 7014, the second steel wire rope 7012, the first pressure cover 7011 and the second pad 7016 in sequence, and is then threadedly connected with the fifth nut 7018;The third sealing brush 703 includes a second gland 7031, a third steel wire rope 7032, and an extrusion plate 7033. The second gland 7031 is connected to one side of the upper end of the brush handle 702. A second installation groove is provided on the second gland 7031 facing the brush handle 702. A plurality of third steel wire ropes 7032 are stacked in layers in the second installation groove. An extrusion plate 7033 is connected to the notch of the second installation groove. One side of the extrusion plate 7033 conflicts with the third steel wire ropes 7032 stacked in layers, and the other side of the extrusion plate 7033 conflicts with the brush handle 702. After one end of the third steel wire rope 7032 passes through the second installation groove, A brush structure is formed, which contacts the inner wall of the outer sleeve 1; the flexible steel sheet sealing brush 704 includes a flat steel 7041, a thin plate 7042, and a third pressing plate 7043. The other side of the upper end of the brush handle 702 is stacked and fixed with a thin plate 7042 and a flat steel 7041 in sequence. The outermost layer of the stacking structure always ends with a thin plate 7042, and the third pressing plate 7043 is connected to the outermost thin plate 7042. The flat steel 7041 extends from one side of the thin plate 7042 to form a multi-layer brush strip, which contacts the inner side of the outer sleeve 1; the sixth bolt 7044 passes through the second gland 7031 in sequence , the third steel wire rope 7032, the extrusion plate 7033, the stacking layer formed by the thin plate 7042 and the flat steel 7041, and the third pressing plate 7043 are threadedly connected with the sixth nut 7045; the stacking number of layers of the first steel wire rope 6036 is more than two layers, the stacking number of layers of the second steel wire rope 7012 and the third steel wire rope 7032 are more than three layers, the first steel wire rope 6036, the second steel wire rope 7012, and the third steel wire rope 7032 are all made of stainless steel; each group of thin plates 7042 is composed of more than two layers of stainless steel sheets, the number of thin plates 7042 groups is one more than the number of flat steel 7041 groups, and the number of flat steel 7041 groups is more than one layer. The number of groups is more than three layers, and the flat steel 7041 and the thin plate 7042 are arranged at intervals. In this embodiment, the axial sealing assembly 7 realizes sealing performance by the second sealing brush 701, the third sealing brush 703 and the flexible steel sheet sealing brush 704, wherein the second sealing brush 701 and the third sealing brush 703 realize relative sealing through the brush structure formed by the steel wire rope, and the second flexible steel sheet sealing brush 704 realizes sealing through the contact between the stainless steel sheet and the outer sleeve 1. In this embodiment, the modular design and multi-layer structure not only enhance the sealing performance, but also improve the durability and maintenance convenience of the assembly. ;

[0030] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A rotary regenerative air preheater gas sealing device, comprising a regenerative air preheater, characterized in that: The regenerative air preheater comprises an outer sleeve (1), a center sleeve (2), a drive shaft (3), a ring sleeve plate (4), a sector plate (5), a radial sealing assembly (6), and an axial sealing assembly (7). The middle of the center sleeve (2) is connected to the drive shaft (3). Both ends of the center sleeve (2) are fixedly connected to sealing rings (8). A plurality of radial baffles (9) are fixedly connected to the center sleeve (2) between the sealing rings (8). The radial baffles (9) are evenly spaced along the circumferential direction of the center sleeve (2). The radial baffles (9) and the center sleeve (2) are both rotatably connected in the outer sleeve (1). The outer sleeve (1), the radial baffles (9) and the center sleeve (2) form a closed shape. A heat exchange unit (10) is arranged in the space formed by the radial partition (9), the outer edge of the radial partition (9) is connected to an axial sealing assembly (7), the axial sealing assembly (7) is slidably connected to the inner wall of the outer sleeve (1), the upper and lower sides of the radial partition (9) are respectively provided with radial sealing assemblies (6), one end of the radial sealing assembly (6) is connected to the outer periphery of the sealing ring (8), one side of the outer end of the sealing ring (8) is rotatably connected to a ring plate (4), the drive shaft (3) is rotatably connected to the middle of the ring plate (4), the outer edge of the ring plate (4) is fixedly connected to a plurality of fan-shaped plates (5), one side of the outer end of the fan-shaped plates (5) is respectively fixedly connected to the inner wall of the outer sleeve (1), and the radial sealing assemblies (6) are respectively slidably connected to the fan-shaped plates (5).

2. The rotary regenerative air preheater gas sealing device according to claim 1, characterized in that: The radial sealing assembly (6) comprises a mounting plate (601) and a sealing plate (602); the mounting plate (601) is arranged on the radial partition plate (9) on one side along the rotation direction; a first sealing brush (603) is arranged on the upper end of the mounting plate (601); a sealing plate (602) is arranged on the other side of the radial partition plate (9); a buffer plate (604) is connected to one side of the sealing plate (602); a fixing plate (605) is connected to one side of the buffer plate (604); and the fixing plate (605) is connected to one side of the buffer plate (604). 605) is rotatably connected to a movable plate (606) at its upper end, a rolling seal (607) is fixedly connected to the upper end of the movable plate (606), a spring member (608) is connected to the lower end of the movable plate (606), a lower end of the spring member (608) is fixedly connected to a support plate (609), one side of the support plate (609) is fixedly connected to the fixed plate (605), and a plurality of reinforcing ribs (610) are fixedly connected between the lower end surface of the support plate (609) and the fixed plate (605); The outer side surface of the fixing plate (605) is provided with a plurality of first pressure plates (611), and the outer side surface of the mounting plate (601) is provided with a plurality of second pressure plates (612), the second pressure plates (612) respectively corresponding to the first pressure plates (611), and the first bolt (613) sequentially penetrates the first pressure plate (611), the fixing plate (605), the buffer plate (604), the sealing plate (602), the radial partition plate (9), the mounting plate (601) and the second pressure plate (612) and is then threadedly connected to the first nut (614).

3. The rotary regenerative air preheater gas sealing device according to claim 2, characterized in that: The spring member (608) comprises an upper rotating support (6081), a lower rotating support (6082), a telescopic rod (6083), and a coil spring (6084); one side of the lower end of the movable plate (606) is fixedly connected to the upper rotating support (6081); one side of the upper end of the support plate (609) is fixedly connected to the lower rotating support (6082); a telescopic rod (6083) is fixedly connected between the upper rotating support (6081) and the lower rotating support (6082); a coil spring (6084) is sleeved on the telescopic rod (6083); one end of the coil spring (6084) is in contact with the upper rotating support (6081), and the other end of the coil spring (6084) is in contact with the lower rotating support (6082).

4. The rotary regenerative air preheater gas sealing device according to claim 3, characterized in that: The rolling seal (607) comprises a rolling frame (6071), a fixed shaft (6072), a rotating bearing (6073), an isolating disc (6074), and a spring sheet (6075). The upper end of the movable plate (606) is connected to a plurality of evenly arranged rolling frames (6071). A second bolt (6076) passes through the movable plate (606) and the rolling frame (6071) in sequence and is threadedly connected to a second nut (6077). A rotating groove (6078) is provided on the rolling frame (6071). A fixed shaft (6072) is fixedly connected in the rotating groove (6078). A second nut (6076) is fixedly connected to the fixed shaft (6072). A plurality of isolation disks (6074), wherein the fixed shafts (6072) on both sides of the isolation disks (6074) are respectively connected to rotating bearings (6073), the outer peripheries of the rotating bearings (6073) are fixedly connected to rotating wheels (6079), and the rotating wheels (6079) are respectively rotatably connected to the fan-shaped plates (5), and a spring sheet (6075) is fixedly connected between two adjacent groups of the rolling frames (6071) via screws (60710), the middle section of the spring sheet (6075) is an S-shaped corrugation, the end section of the spring sheet (6075) is an arc structure, and the outer arc surface of the arc structure is slidably connected to the fan-shaped plate (5).

5. The rotary regenerative air preheater gas sealing device according to claim 4, characterized in that: The first sealing brush (603) comprises a clamping plate (6031), a third bolt (6032), a third nut (6033), a fourth bolt (6034), a fourth nut (6035), and a first steel wire rope (6036); the clamping plates (6031) are connected to both sides of the edge of the upper end of the mounting plate (601); the third bolt (6032) passes through the clamping plate (6031) and the mounting plate (601) in sequence and is then threadedly connected to the third nut (6033). A plurality of first steel wire ropes (6036) stacked in layers are connected between the clamping plates (6031) at the upper ends of the mounting plates (601), one end of the first steel wire rope (6036) passes through the clamping plates (6031) to form a bristle structure, and the bristle structure contacts the fan-shaped plate (5), and the fourth bolt (6034) passes through the two groups of clamping plates (6031) and the first steel wire rope (6036) located in the middle and is threadedly connected to the fourth bolt (6034).

6. The rotary regenerative air preheater gas sealing device according to claim 5, characterized in that: The axial sealing assembly (7) comprises a second sealing brush (701), a brush handle (702), a third sealing brush (703), and a flexible steel sheet sealing brush (704); the second sealing brush (701) is fixedly connected to the radial partition (9) on one side in the rotation direction; the brush handle (702) is fixedly connected to the other side of the radial partition (9); the upper end of the brush handle (702) is bent in a direction away from the radial partition (9) at a bending angle of 45°; the third sealing brush (703) is connected to one side of the brush handle (702) at the upper end of the bent portion; and the flexible steel sheet sealing brush (704) is fixedly connected to the other side of the brush handle (702) at the upper end of the bent portion.

7. The rotary regenerative air preheater gas sealing device according to claim 6, characterized in that: The second sealing brush (701) comprises a first gland (7011), a second steel wire rope (7012), a front bending pressure plate (7013), and a rear bending pressure plate (7014); the first gland (7011) is connected to the radial partition (9) located on the side of the rotation direction; a first installation groove is provided on one side of the first gland (7011); a plurality of second steel wire ropes (7012) are stacked in layers in the first installation groove; a rear bending pressure plate (7014) is connected to the notch of the first installation groove; one side of the rear bending pressure plate (7014) is connected to the second steel wire ropes (7012) stacked in layers; 012), the other side of the rear bending pressure plate (7014) is in conflict with the radial partition (9), the upper end of the rear bending pressure plate (7014) passes through the first installation groove and is bent toward the radial partition (9), one end of the second steel wire rope (7012) passes through the installation groove to form a brush structure, and the brush structure contacts the inner wall of the outer sleeve (1), one side of the edge of the first pressure cover (7011) is fixedly connected with a front bending pressure plate (7013), and the upper end of the front bending pressure plate (7013) is bent toward the side of the second steel wire rope (7012), and the bending angle is 10°; A first pad (7015) is provided on one side of the brush handle (702), a second pad (7016) is provided on one side of the outer end of the first pressure cover (7011), and a fifth bolt (7017) sequentially penetrates the first pad (7015), the brush handle (702), the radial partition (9), the rear bend pressure plate (7014), the second steel wire rope (7012), the first pressure cover (7011) and the second pad (7016) and is then threadedly connected to the fifth nut (7018).

8. The rotary regenerative air preheater gas sealing device according to claim 7, characterized in that: The third sealing brush (703) comprises a second gland (7031), a third steel wire rope (7032), and an extrusion plate (7033); one side of the upper end of the brush handle (702) is connected to the second gland (7031); a second installation groove is provided on the second gland (7031) facing the side of the brush handle (702); a plurality of third steel wire ropes (7032) are stacked in layers in the second installation groove; an extrusion plate (7033) is connected to the notch of the second installation groove; one side of the extrusion plate (7033) contacts the third steel wire ropes (7032) stacked in layers; the other side of the extrusion plate (7033) contacts the brush handle (702); one end of the third steel wire rope (7032) passes through the second installation groove to form a brush structure; the brush structure contacts the inner wall of the outer sleeve (1).

9. The rotary regenerative air preheater gas sealing device according to claim 8, characterized in that: The flexible steel sheet sealing brush (704) comprises a flat steel (7041), a thin plate (7042), and a third pressing plate (7043); the other side of the upper end of the brush handle (702) is stacked and fixed with a thin plate (7042) and a flat steel (7041) in sequence; the outermost layer of the stacking structure always ends with a thin plate (7042), and the third pressing plate (7043) is connected to the outermost thin plate (7042); one side of the thin plate (7042) extends out of the flat steel (7041) to form a multi-layer brush strip, and the brush strip contacts the inner side surface of the outer sleeve (1); The sixth bolt (7044) sequentially passes through the second gland (7031), the third steel wire rope (7032), the extrusion plate (7033), the stacked layer formed by the thin plate (7042) and the flat steel (7041), and the third pressing plate (7043), and is then threadedly connected to the sixth nut (7045).

10. The rotary regenerative air preheater air sealing device according to claim 9, characterized in that: The number of stacked layers of the first steel wire rope (6036) is more than two, the number of stacked layers of the second steel wire rope (7012) and the third steel wire rope (7032) are both more than three, and the first steel wire rope (6036), the second steel wire rope (7012), and the third steel wire rope (7032) are all made of stainless steel; Each group of the thin plates (7042) is composed of more than two layers of stainless steel sheets, the number of the thin plates (7042) is one group more than the number of the flat steels (7041), the number of the flat steels (7041) is provided with more than three layers, and the flat steels (7041) and the thin plates (7042) are arranged in an alternating manner.

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