Air pre-heater axial sealing assembly and air pre-heater

Abstract

The utility model discloses an air pre-heater axial sealing assembly and an air pre-heater, and relates to the technical field of air pre-heater sealing assemblys.The air pre-heater axial sealing assembly comprises a sealing plate and further comprises a supporting assembly used for supporting the sealing plate, the supporting assembly comprises an assembly frame and connecting springs, and the connecting springs comprise a first spring and a second spring; the upper end of the inner side of the sealing plate is connected with the assembly frame through a first spring, and the lower end of the inner side of the sealing plate is connected with the assembly frame through a second spring. The first spring and the second spring can generate tensile elastic deformation and compression elastic deformation in the width direction of the sealing plate, and the air pre-heater comprises the sealing assembly. The sealing assembly is suitable for being used as a ventilation wall dynamic sealing mechanism of the air pre-heater, when the sealing plate makes contact with the inner wall of the rotor, the sealing plate can adapt to the gap widths, located at different axial positions of the rotor, between the rotor and the stator through deflection, and therefore the purpose of reducing the abrasion speed of the sealing plate under the working condition is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to air preheater sealing assembly technical field, especially air preheater axial sealing assembly and air preheater. BACKGROUND

[0002] Air preheater (hereinafter referred to as air preheater) is the important part of boiler, its function is to utilize the heat of boiler tail flue gas to heat the air entering the boiler, to improve the boiler efficiency. Axial leakage is the gas leakage phenomenon that air preheater occurs in the axial direction during the operation process, to protect the boiler efficiency, the solution method used is to set axial sealing assembly, to reduce the leakage increase caused by thermal deformation, installation error etc.

[0003] The main modes of achieving sealing effect of the axial sealing assembly include:

[0004] 1. Contact sealing, specifically using spring sheet to form the physical barrier between rotor and stator, as air preheater has inconsistent rotor deformation under different working conditions, has the characteristics of spring sheet and stator inner wall sliding friction, so this mode is usually used in low speed (less than 2 revolutions per minute) air preheater, and has the characteristics of fast spring sheet wear and high maintenance frequency;

[0005] 2. Labyrinth sealing, specifically using labyrinth sealing assembly to increase the fluid leakage resistance of leakage channel, has the characteristics of simple structure and not easy to wear, to achieve ideal sealing effect, usually needs to cooperate with other sealing modes;

[0006] 3. Gas injection sealing, as it needs to be matched with gas injection system, has certain influence on rotor thermal deformation and thermal efficiency, this mode is less used in air preheater;

[0007] 4. Wind wall dynamic sealing, specifically forming air pressure barrier along the outer edge of sealing sheet through the sealing sheet rotating with the rotor, to achieve the purpose of blocking the leakage of flue gas or air along the rotor axial direction, this sealing mode can realize non-wear sealing under ideal conditions (after the rotor deformation reaches a certain degree, it is easy to appear sliding friction with the stator inner wall), and is suitable for high speed (greater than or equal to 2 revolutions per minute) air preheater.

[0008] The above wind wall dynamic sealing technology and contact sealing technology are usually used in spring plate as sealing plate in specific application, when the sealing plate contacts and rubs with the stator inner wall, the elastic deformation of the sealing plate can reduce the mechanical wear of the sealing plate, to further solve the contact force problem between the sealing plate and the stator inner wall due to rotor thermal deformation etc. after contacting with the stator inner wall, it is necessary to further optimize the related sealing assembly. UTILITY MODEL CONTENTS

[0009] In view of the above-mentioned contact force problem of the sealing plate contacting the inner wall of the stator, the utility model provides an air preheater axial sealing assembly and air preheater, the sealing assembly is suitable for as the air preheater wind wall dynamic sealing mechanism, when the sealing plate contacts the inner wall of the rotor, the sealing plate can be deflected, adapt to the gap width between the rotor and the stator at different axial positions of the rotor, so as to achieve the purpose of reducing the wear rate of the sealing plate under this working condition.

[0010] In view of the above-mentioned problem, the utility model provides an air preheater axial sealing assembly and air preheater solve problems through the following technical points: an air preheater axial sealing assembly, including sealing plate, further including support assembly for supporting sealing plate, the support assembly includes assembly frame and connecting spring, the connecting spring includes first spring and second spring, the upper end of the inner side of the sealing plate is connected with the assembly frame through the first spring, the lower end of the inner side of the sealing plate is connected with the assembly frame through the second spring;

[0011] The first spring and the second spring can produce tensile elastic deformation and compressive elastic deformation in the width direction of the sealing plate.

[0012] The scheme can be used as the wind wall dynamic sealing mechanism of the air preheater in specific application, and is specifically used as the axial sealing assembly of the air preheater. The specific use method is that the support assembly is installed on the rotor of the air preheater through the assembly frame thereof, and the sealing plate is kept in a vertical state, the outer side of the sealing plate has a gap with the inner wall of the stator under cold state. When the air preheater works, the sealing plate rotates with the rotor, and the sealing plate forms a gas pressure barrier between the sealing plate and the stator at the outer edge thereof, which is used to reduce the axial leakage occurring on the air preheater.

[0013] Different from the prior art, the scheme provides a technical scheme for establishing the connection relationship between the sealing plate and the rotor through the connecting spring, so that when the rotor is deformed and the outer side of the sealing plate contacts the inner wall of the stator under hot state, the sealing plate can be deflected, adapt to the gap width between the rotor and the stator at different axial positions of the rotor, so as to achieve the purpose of reducing the wear rate of the sealing plate under this working condition.

[0014] Specifically, when the rotor is mushroom-shaped deformation, the upper end of the sealing plate vertically installed on the rotor has a small gap with the stator, and the lower end has a large gap with the stator. In this working condition, when the air preheater operates and the upper end of the sealing plate contacts and extrudes the stator, the first spring and the second spring can deform axially and radially to different degrees to adapt to the deflection of the sealing plate relative to the rotor under the contact force. For example, the first spring retracts, and the sealing plate deflects inwardly from the upper end to the lower end. Compared with the sealing plate rigidly connected to the rotor, the above deflection allows the outer side of the sealing plate to better fit the inner wall of the stator, thereby reducing the gap between the sealing plate and the stator and the contact force between them, achieving the purpose of reducing the wear rate of the sealing plate.

[0015] In specific applications, as a preferred solution, to reduce the gap between adjacent sealing assemblies arranged in sequence on the rotor axis, an ear plate is provided on the assembly frame, which protrudes to the inner side of the assembly frame and has a bolt hole for establishing a bolt connection relationship between the assembly frame and the rotor. That is, the ear plate does not occupy the space between adjacent sealing assemblies to achieve the purpose; as a preferred solution, to limit the maximum outward extension of the sealing plate relative to the assembly frame and facilitate the establishment of fixed connection between the connecting spring and the sealing plate, the inner side of the sealing plate has a folded edge, and the connection position of the connecting spring on the sealing plate is located on the inner side end face of the folded edge. At the same time, the folded edge is used as a clamping protrusion on the sealing plate, and the protruding structure on the assembly frame located on the movement track of the clamping protrusion restricts the end position of the outward movement of the sealing plate.

[0016] As a further technical solution of the axial sealing assembly:

[0017] The support assembly further includes a sliding block, and the first spring and the second spring each have a separate sliding block, which is arranged on the assembly frame, and the position of the sliding block in the width direction of the sealing plate is adjustable.

[0018] The first spring and the second spring are each fixedly connected at one end to the sliding block and at one end to the side surface of the sealing plate.

[0019] The above scheme is that: by adjusting the position of each sliding block in the width direction of the sealing plate on the assembly frame, the initial extension state of the sealing plate relative to the assembly frame is adjusted to adapt to the sealing needs of different axial positions of the rotor. For example, for batch-produced sealing assemblies with the same size and structure, the sealing assemblies closer to the upper end of the rotor are initially installed with the sliding blocks closer to the rotor on the assembly frame, so that the sealing plates of these sealing assemblies have a smaller extension amount relative to the assembly frame, which is used to adapt to the narrower gap between the upper end of the rotor and the stator. That is, the sliding block on the assembly frame in the width direction of the sealing plate is adjustable, so that the initial extension amount of the sealing plate relative to the assembly frame is adjustable to adapt to the specific application needs.

[0020] The assembly frame is a box structure, and the inner side of the sealing plate, the sliding block, the first spring and the second spring are located inside the box structure, and the sealing plate passes through the side wall of the assembly frame through the channel provided on the outside of the assembly frame.

[0021] In the above scheme, the assembly frame in the box structure is used to provide a relatively closed installation space for the sealing plate, the connecting spring and the sliding block, which can constrain the parts while avoiding the influence of dust in the flue gas that has not been cleaned on the position adjustment of the sliding block; the channel is used as a passage for the sealing plate to pass through the side wall of the assembly frame. Specifically, the assembly frame can include an upper box body and a lower box body, the upper box body and the lower box body form an upper and lower snap-fit relationship, and the installation space is formed between the two, and the grooves on the outer side walls of the two form the channel.

[0022] Further comprising a partition plate provided on the assembly frame, the partition plate separates a sliding groove on the assembly frame, each sliding block is provided with a separate sliding groove, the sliding groove extends along the width direction of the sealing plate, and the sliding block can slide along the sliding groove.

[0023] In the above scheme, the sliding groove for the sliding block to slide is formed by the partition plate, and the position of the sliding block on the assembly frame is constrained by the groove wall of the sliding groove.

[0024] Each sliding block is provided with an adjustment bolt for adjusting the position of the sliding block in the sliding groove.

[0025] The above scheme provides an implementation scheme for controlling the position of the sliding block in the sliding groove based on the adjustment bolt, including but not limited to the following scheme of providing an adjustment bolt on the inner side wall of the assembly frame, for example, an adjustment bolt that can play a tensioning or pressing role can be provided on the side surface, top surface or bottom surface of the sliding block. In this application, only a bolt hole for the adjustment bolt to slide needs to be provided on the assembly frame at the appropriate position, but such an implementation has the characteristics of inconvenient adjustment of the position of the sliding block or affecting the setting of the partition plate.

[0026] The assembly frame is a box structure, the adjusting bolt is threadedly connected to the side wall on the inner side of the assembly frame, the end of the adjusting bolt close to the sliding block is provided with a snap ring, the end of the sliding block close to the adjusting bolt is provided with a clamping groove, the snap ring is embedded in the clamping groove, and the snap ring and the clamping groove are matched to be: the adjusting bolt can rotate relative to the sliding block around the axis of the adjusting bolt, and the position of the sliding block on the axis of the adjusting bolt is fixed.

[0027] The above scheme provides a specific adjusting bolt implementation, that is, only the adjusting bolt needs to be rotated from the inner side of the assembly frame, so that the sliding block and the adjusting bolt keep synchronous axial movement, and the position of the sliding block on the assembly frame is changed. In the above scheme, the snap ring and the clamping groove are used to form a matching relationship that the adjusting bolt can rotate relative to the sliding block, and the relative position of the sliding block and the adjusting bolt is fixed. The position of the adjusting bolt is set according to the matching relationship, which does not increase the exposure of internal parts of the assembly frame, and the operation can be completed outside the assembly frame, and does not affect the arrangement of the side plates on both sides of the assembly frame.

[0028] Further comprising a connecting nut welded to the inner wall surface of the inner side wall of the assembly frame, the inner side wall of the assembly frame is provided with a through hole in communication with the connecting nut, and the adjusting bolt passes through the through hole and is threadedly connected with the connecting nut.

[0029] In the above scheme, the connecting nut is used to provide a connecting thread for threadedly connecting the assembly frame and the adjusting bolt, so as to reduce the thickness requirement of the inner side wall of the assembly frame, and the through hole is used as a passage for the adjusting bolt to pass through the side wall.

[0030] Further comprising a locking nut threadedly connected to the adjusting bolt, and the locking nut is located outside the assembly frame.

[0031] In the above scheme, the locking nut is used to lock the adjusting bolt on the assembly frame, so that the sliding block still has good position maintaining ability under vibration and other working conditions. The specific use method is: after the adjusting bolt is adjusted to a suitable axial position, the locking nut is rotated to achieve the purpose by using the extrusion force of the locking nut and the outer side of the inner wall of the assembly frame.

[0032] Both sides of the sealing plate are provided with side plates for supporting the side surface of the sealing plate, the inner side of the side plate is fixed to the assembly frame, and the outer side of the sealing plate protrudes to the outside of the side plate.

[0033] The connecting spring is a concave spiral spring.

[0034] In the above scheme, the side plate is used to support the sealing plate, and is used to increase the anti-deformation ability of the sealing plate and maintain the sealing performance of the sealing plate; the concave spiral spring is used as the connecting spring, which is used to increase the radial deformation ability of the connecting spring, so as to reduce the resistance of the deflection of the sealing plate.

[0035] The scheme also relates to an air preheater comprising a rotor and an axial sealing assembly mounted on the rotor, wherein the axial sealing assembly is the axial sealing assembly as described above.

[0036] The scheme also comprises a mounting strip mounted on the side surface of the rotor, wherein the mounting strip extends along the axial direction of the rotor.

[0037] The axial sealing assembly is mounted on the mounting strip through the assembly frame, and a plurality of axial sealing assemblies are mounted on the mounting strip along the length direction of the mounting strip. The above scheme provides an air preheater adopting the sealing assembly, and an implementation mode of the use of the sealing assembly.

[0038] The utility model has the following beneficial effects:

[0039] In the scheme, when the air preheater operates and the upper end of the sealing plate contacts and is pressed against the stator, the upper and lower ends of the sealing plate are flexibly connected with the assembly frame through the first spring and the second spring, and the first spring and the second spring can be axially deformed and radially deformed to different degrees to adapt to the deflection of the sealing plate relative to the rotor under the contact force, so that the gap size between the sealing plate and the stator can be reduced, and the contact force between the sealing plate and the stator can be reduced, so that the sealing plate can adapt to the gap width between the rotor and the stator, and the wear speed of the sealing plate is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 The scheme is a structural schematic view of one specific implementation example of an air preheater axial sealing assembly.

[0041] Figure 2 In one specific implementation example of the scheme, a sectional view of the assembly frame is shown.

[0042] The reference signs in the drawings are as follows: 1, mounting strip, 2, ear plate, 3, support assembly, 4, side plate, 5, sealing plate, 6, folded edge, 7, connecting spring, 8, partition plate, 9, sliding block, 10, adjusting bolt, 11, sliding groove, 12, locking nut. DETAILED DESCRIPTION

[0043] The utility model will be further described in detail in combination with the embodiments, but the utility model is not limited to the following embodiments:

[0044] Embodiment 1:

[0045] As Figure 1 and Figure 2As shown, an axial seal assembly of an air preheater includes a seal plate 5, and further includes a support assembly 3 for supporting the seal plate 5, the support assembly 3 including an assembly frame and a connecting spring 7, the connecting spring 7 including a first spring and a second spring, the upper end of the inner side of the seal plate 5 being connected to the assembly frame through the first spring, and the lower end of the inner side of the seal plate 5 being connected to the assembly frame through the second spring.

[0046] Both the first spring and the second spring can produce tensile elastic deformation and compressive elastic deformation in the width direction of the seal plate 5.

[0047] In specific application, the present scheme can be used as a dynamic seal mechanism of an air preheater wind wall, and specifically used as an axial seal assembly of an air preheater. The specific use method is that the support assembly 3 is installed on the rotor of the air preheater through the assembly frame thereof, and the seal plate 5 is kept in a vertical state, and the outer side of the seal plate 5 has a gap with the inner wall of the stator in cold state. When the air preheater works, the seal plate 5 rotates with the rotor, and the seal plate 5 forms a gas pressure barrier between the seal plate 5 and the stator at the outer edge thereof, which is used to reduce the axial leakage occurring on the air preheater.

[0048] Different from the prior art, the present scheme provides a technical scheme for establishing the connecting relationship between the seal plate 5 and the rotor through the connecting spring 7, so that when the outer side of the seal plate 5 contacts the inner wall of the stator due to the deformation of the rotor, the seal plate 5 can be deflected to adapt to the gap width between the rotor and the stator at different axial positions of the rotor, thereby achieving the purpose of reducing the wear speed of the seal plate 5 in this working condition.

[0049] Specifically, when the rotor is mushroom-shaped deformation, the upper end of the sealing plate 5 vertically installed on the rotor has a smaller gap with the stator, and the lower end has a larger gap with the stator. In this working condition, when the air preheater operates and the upper end of the sealing plate 5 contacts and extrudes the stator, the first spring and the second spring can deform axially and radially to different degrees to adapt to the deflection of the sealing plate 5 relative to the rotor under the contact force, such as retraction through the first spring. Among the upper and lower ends of the sealing plate 5, the sealing plate 5 deflects inwardly from the upper end to the lower end. Compared with the sealing plate 5 rigidly connected to the rotor, the above deflection enables the outer side of the sealing plate 5 to better fit the inner wall of the stator, thereby reducing the gap between the sealing plate 5 and the stator and the contact force between the sealing plate 5 and the stator, achieving the purpose of the sealing plate 5 adapting to the gap width between the rotor and the stator and reducing the wear rate of the sealing plate 5.

[0050] In specific application, as a preferred solution, to reduce the gap between adjacent sealing assemblies when the sealing assemblies are arranged in sequence on the rotor axis, an ear plate 2 is provided on the assembly frame, which protrudes to the inner side of the assembly frame. The ear plate 2 has a bolt hole for establishing a bolt connection relationship between the assembly frame and the rotor, that is, the ear plate 2 does not occupy the space between adjacent sealing assemblies to achieve the purpose; as a preferred solution, to limit the maximum outward extension of the sealing plate 5 relative to the assembly frame and facilitate the establishment of fixed connection between the connecting spring 7 and the sealing plate 5, the inner side of the sealing plate 5 has a folded edge 6, and the connection position of the connecting spring 7 on the sealing plate 5 is located on the inner side end face of the folded edge 6. At the same time, the folded edge 6 is used as a clamping protrusion on the sealing plate 5, and the protruding structure on the assembly frame located on the movement track of the clamping protrusion restricts the terminal position of the outward movement of the sealing plate 5.

[0051] Embodiment 2:

[0052] This embodiment is further refined based on Embodiment 1:

[0053] The support assembly 3 further includes a sliding block 9, and the first spring and the second spring each have a separate sliding block 9. The sliding block 9 is arranged on the assembly frame, and the position of the sliding block 9 in the width direction of the sealing plate 5 is adjustable.

[0054] The first spring and the second spring are each fixedly connected at one end to the sliding block 9 and at one end to the side surface of the sealing plate 5.

[0055] The above scheme is that: by adjusting the position of each sliding block 9 on the assembly frame in the width direction of the sealing plate 5, the initial extension state of the sealing plate 5 relative to the assembly frame is adjusted to adapt to the sealing needs of different axial positions of the rotor. For example, for a batch of sealing assemblies with the same size and structure, the sealing assemblies closer to the upper end of the rotor are initially installed with the sliding block 9 closer to the rotor on the assembly frame, so that the sealing plate 5 on these sealing assemblies has a smaller extension amount relative to the assembly frame, which is used to adapt to the narrower gap between the upper end of the rotor and the stator. That is, the above sliding block 9 adjustable in position on the assembly frame in the width direction of the sealing plate 5 is designed to adjust the initial extension amount of the sealing plate 5 relative to the assembly frame to adapt to the specific application needs.

[0056] Embodiment 3:

[0057] This embodiment is further refined on the basis of Embodiment 2:

[0058] The assembly frame is a box structure, and the inner side of the sealing plate 5, the sliding block 9, the first spring, and the second spring are all located inside the box structure, and the sealing plate 5 passes through the side wall of the assembly frame through the channel provided on the outside of the assembly frame.

[0059] In the above scheme, the assembly frame in the box structure is used to provide a relatively closed installation space for the sealing plate 5, the connecting spring 7, and the sliding block 9, which can constrain the parts while avoiding the influence of dust in the flue gas that has not been cleaned on the position of the adjusting sliding block 9; the channel is used as a passage for the sealing plate 5 to pass through the side wall of the assembly frame. Specifically, the assembly frame can include an upper box body and a lower box body, the upper box body and the lower box body form an upper and lower snap-fit relationship, and the installation space is formed between the two, and the grooves on the outer side walls of the two form the channel.

[0060] Embodiment 4:

[0061] This embodiment is further refined on the basis of Embodiment 2 or 3:

[0062] It also includes a partition plate 8 provided on the assembly frame, which separates a sliding groove 11 on the assembly frame, and each sliding block 9 is provided with a separate sliding groove 11, which extends along the width direction of the sealing plate 5, and the sliding block 9 can slide along the sliding groove 11.

[0063] In the above scheme, the sliding groove 11 for the sliding block 9 to slide is formed by the partition plate 8, and the position of the sliding block 9 on the assembly frame is constrained by the groove wall of the sliding groove 11.

[0064] Embodiment 5:

[0065] This embodiment is further refined on the basis of Embodiment 4:

[0066] Each slider 9 is provided with an adjusting bolt 10 for adjusting the position of the slider 9 in the sliding groove 11.

[0067] The above scheme provides an implementation scheme for controlling the position of the slider 9 in the sliding groove 11 based on the adjusting bolt 10, including but not limited to the following scheme of arranging the adjusting bolt 10 on the inner side wall of the assembly rack, for example, the adjusting bolt 10 can be arranged on the side, top or bottom surface of the slider 9 to play a tensioning or pressing role. With this application, only the bolt hole for the sliding of the adjusting bolt 10 needs to be arranged on the appropriate position of the assembly rack, but such implementation has the characteristics of inconvenient adjustment of the position of the slider 9 or affecting the arrangement of the side plate 4.

[0068] Embodiment 6:

[0069] This embodiment is further refined on the basis of Embodiment 5:

[0070] The assembly rack is a box structure, the adjusting bolt 10 is threadedly connected to the inner side wall of the assembly rack, the end of the adjusting bolt 10 close to the slider 9 is provided with a snap ring, the end of the slider 9 close to the adjusting bolt 10 is provided with a clamping groove, the snap ring is embedded in the clamping groove, and the snap ring and the clamping groove are matched to: the adjusting bolt 10 can rotate around its own axis relative to the slider 9, and the position of the slider 9 on the axis of the adjusting bolt 10 is fixed.

[0071] The above scheme provides a specific implementation of the adjusting bolt 10, that is, only the adjusting bolt 10 needs to be rotated from the inner side of the assembly rack, so that the slider 9 and the adjusting bolt 10 can keep synchronous axial movement, and the position of the slider 9 on the assembly rack can be changed. In the above scheme, the snap ring and the clamping groove are used to form a matching relationship that the adjusting bolt 10 can rotate relative to the slider 9, and the relative position of the slider 9 and the adjusting bolt 10 is fixed. The above adjusting bolt 10 is arranged at a position corresponding to the matching relationship, which does not increase the exposure of the internal parts of the assembly rack, and the operation can be completed outside the assembly rack without affecting the arrangement of the side plate 4 on both sides of the assembly rack.

[0072] Embodiment 7:

[0073] This embodiment is further refined on the basis of Embodiment 6:

[0074] Further comprising a connecting nut welded to the inner wall surface of the inner side wall of the assembly rack, the inner side wall of the assembly rack is provided with a through hole in communication with the connecting nut, and the adjusting bolt 10 passes through the through hole and is threadedly connected with the connecting nut.

[0075] In the above scheme, the connecting nut is used to provide a connecting thread for the threaded connection of the assembly rack and the adjusting bolt 10, so as to reduce the thickness requirement of the inner side wall of the assembly rack. The above through hole is used as a passage for the adjusting bolt 10 to pass through the side wall.

[0076] Embodiment 8:

[0077] This embodiment is further refined on the basis of Embodiment 6:

[0078] Further comprising a locking nut 12 threaded on the adjusting bolt 10, which is located outside the assembly frame.

[0079] In the above scheme, the locking nut 12 is used to achieve the locking of the adjusting bolt 10 on the assembly frame, so that the slider 9 still has good position keeping ability under working conditions such as vibration. The specific use method is: after the adjusting bolt 10 is adjusted to the appropriate axial position, the locking nut 12 is rotated to achieve the purpose by using the extrusion force of the locking nut 12 and the inner wall outside of the assembly frame.

[0080] Embodiment 9:

[0081] This embodiment is further refined on the basis of Embodiment 1:

[0082] Both sides of the sealing plate 5 are provided with side plates 4 for supporting the side of the sealing plate 5, the inner side of the side plate 4 is fixed on the assembly frame, and the outer side of the sealing plate 5 protrudes to the outside of the side plate 4;

[0083] The connecting spring 7 is a concave spiral spring.

[0084] In the above scheme, the side plate 4 is used to support the sealing plate 5, to increase the anti-deformation ability of the sealing plate 5 and maintain the sealing performance of the sealing plate 5; the concave spiral spring is used as the connecting spring 7, to increase the radial deformation ability of the connecting spring 7, so as to reduce the resistance of the deflection of the sealing plate 5.

[0085] Embodiment 10:

[0086] This embodiment is further refined on the basis of Embodiment 1, and provides an air preheater, comprising a rotor and an axial sealing assembly installed on the rotor, wherein the axial sealing assembly is the axial sealing assembly as described above.

[0087] Further comprising a mounting strip 1 installed on the side of the rotor, and the mounting strip 1 extends along the axial direction of the rotor.

[0088] The axial sealing assembly is installed on the mounting strip 1 through the assembly frame, and a plurality of axial sealing assemblies are installed on the mounting strip 1 along the length direction thereof. The above scheme provides an air preheater using the sealing assembly, which is an implementation mode of the use of the sealing assembly.

[0089] The above is further detailed description of the utility model in combination with specific preferred embodiments, and cannot be deemed that the specific embodiments of the utility model are limited to these descriptions. Other embodiments obtained by those of ordinary skill in the art to which the utility model belongs without departing from the technical solutions of the utility model shall be included in the protection scope of the utility model.

Claims

1. An axial seal assembly for an air preheater, comprising a seal plate (5), characterized in that, Further comprising a support assembly (3) for supporting the sealing plate (5), the support assembly (3) comprising an assembly frame and a connecting spring (7), the connecting spring (7) comprising a first spring and a second spring, the upper end of the inner side of the sealing plate (5) being connected to the assembly frame by the first spring, and the lower end of the inner side of the sealing plate (5) being connected to the assembly frame by the second spring; Both the first spring and the second spring can produce tensile elastic deformation and compressive elastic deformation in the width direction of the sealing plate (5).

2. An axial seal assembly for an air preheater according to claim 1, wherein, The support assembly (3) further comprises a sliding block (9), and the first spring and the second spring are each provided with a separate sliding block (9), which is arranged on the assembly frame, and the position of the sliding block (9) in the width direction of the sealing plate (5) is adjustable; Both the first spring and the second spring are fixedly connected at one end to the sliding block (9) and at one end to the side surface of the sealing plate (5).

3. An axial seal assembly for an air preheater according to claim 2, wherein, The assembly frame is a box-shaped structure, and the inner side of the sealing plate (5), the sliding block (9), the first spring and the second spring are all located inside the box-shaped structure, and the sealing plate (5) passes through the side wall of the assembly frame through the hole arranged outside the assembly frame.

4. An axial seal assembly for an air preheater according to claim 2 or 3, wherein, Further comprising a partition plate (8) arranged on the assembly frame, the partition plate (8) isolating a sliding groove (11) on the assembly frame, and each sliding block (9) is provided with a separate sliding groove (11), which extends along the width direction of the sealing plate (5), and the sliding block (9) can slide along the sliding groove (11).

5. An axial seal assembly for an air preheater according to claim 4, wherein, Each sliding block (9) is provided with an adjusting bolt (10) for adjusting the position of the sliding block (9) in the sliding groove (11).

6. An axial seal assembly for an air preheater according to claim 5, wherein, The assembly frame is a box-shaped structure, and the adjusting bolt (10) is threadedly connected to the side wall inside the assembly frame, and the end of the adjusting bolt (10) close to the sliding block (9) is provided with a snap ring, and the end of the sliding block (9) close to the adjusting bolt (10) is provided with a clamping groove, and the snap ring is embedded in the clamping groove, and the snap ring and the clamping groove cooperate to allow the adjusting bolt (10) to rotate relative to the sliding block (9) about its own axis, and the position of the sliding block (9) on the axis of the adjusting bolt (10) is fixed.

7. An axial seal assembly for an air preheater according to claim 6 wherein, Further comprising a connecting nut welded to the inner wall surface of the side wall inside the assembly frame, and the side wall inside the assembly frame is provided with a through hole in communication with the connecting nut, and the adjusting bolt (10) passes through the through hole and is threadedly connected to the connecting nut.

8. An axial seal assembly for an air preheater according to claim 6, wherein, Further comprising a locking nut (12) threadedly connected to the adjusting bolt (10), and the locking nut (12) is located outside the assembly frame.

9. An axial seal assembly for an air preheater according to claim 1, wherein, Both sides of the sealing plate (5) are provided with a side plate (4) for supporting the side surface of the sealing plate (5), and the inner side of the side plate (4) is fixed to the assembly frame, and the outer side of the sealing plate (5) protrudes to the outside of the side plate (4). The connecting spring (7) is a concave spiral spring.

10. An air preheater comprising a rotor and an axial seal assembly mounted on the rotor, characterized in that, The axial sealing assembly is the axial sealing assembly of claim 1. Further comprising a mounting strip (1) mounted on the side surface of the rotor, and the mounting strip (1) extends along the axial direction of the rotor. The axial sealing assembly is mounted on the mounting strip (1) through the assembly frame, and a plurality of axial sealing assemblies are mounted on the mounting strip (1) along the length direction thereof.

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