An adaptive cylindrical roller bearing for a sludge thin layer dryer

Abstract

The present application relates to the technical field of cylindrical roller bearing, and particularly relates to a self-adaptive cylindrical roller bearing for sludge thin-layer drying machine, which comprises an inner ring, double-row cylindrical rollers, a solid retainer, an outer ring, a aligning seat ring and a self-adaptive aligning limiting assembly. The outer circumferential surface of the outer ring is a convex spherical surface, the inner circumferential surface of the aligning seat ring is a concave spherical surface, a ring cavity is formed on the spherical surface matching surface, a gas bag is arranged in the ring cavity, the gas bag is filled with gas, and there is a gap between the cold-state shrinkage and the groove wall, which allows large-angle deflection to compensate for installation errors, and the hot-state expansion is tightly attached to the groove wall to limit the deflection angle to avoid the blade from touching the shell. A plurality of flow guide holes are arranged in the outer ring wall, and the lubricating grease flows out of the flow guide holes to the surface of the gas bag to form a lubricating film, which allows the outer ring to produce a small amount of elastic sliding in the limiting state. The self-adjusting balance is formed by the expansion and tightening of the gas bag and the lubricating grease flowing out and relaxing, which avoids the roller eccentric wear caused by excessive limiting.

Description

Technical Field

[0001] This invention relates to the field of cylindrical roller bearing technology, and more particularly to an adaptive cylindrical roller bearing for a sludge thin-layer dryer. Background Technology

[0002] A sludge thin-layer dryer is a device that uses blades on a rotor to scrape sludge into a thin layer and then indirectly heats the sludge by passing steam through the casing. The rotor is long, and the clearance between the blades and the inner wall of the casing is small. During rotor operation, the main shaft elongates and flexes due to heat, placing high demands on the self-aligning compensation capability of the bearings. Existing technology typically uses self-aligning roller bearings, whose outer ring has a spherical outer circumferential surface that mates with the spherical inner bore of the bearing housing. This allows the outer ring of the bearing to deflect relative to the bearing housing within a certain angular range to compensate for installation errors and operational deformations in the shaft system.

[0003] Chinese Patent Publication No. CN202790097U discloses a self-aligning bearing, whose outer ring includes an outer ring and an inner ring. The inner surface of the outer ring is a concave spherical surface, and the outer surface of the inner ring is a convex spherical surface. The inner ring can swing along the axis and be placed inside the outer ring. Automatic self-alignment is achieved through the cooperation of the convex and concave spherical surfaces. This design enables the bearing to automatically align, reduces the bearing's sensitivity to installation accuracy, and improves the bearing's operational stability and service life.

[0004] The existing technology also has the following problems: the self-aligning clearance of the self-aligning bearing is fixed. Increasing the self-aligning clearance can compensate for installation errors, but it will cause the blades to touch the inner wall of the housing during operation. Decreasing the self-aligning clearance can prevent the blades from touching, but it will cause the thermal expansion deformation of the shaft system to be unable to be released, resulting in uneven wear of the rollers. It is difficult to achieve both. Summary of the Invention

[0005] To address this issue, the present invention provides an adaptive cylindrical roller bearing for a sludge thin-layer dryer, which overcomes the problem that in the prior art, the self-aligning clearance of the self-aligning bearing is fixed. Increasing the self-aligning clearance can compensate for installation errors, but it will cause the blades to touch the inner wall of the housing during operation. Decreasing the self-aligning clearance can prevent the blades from touching, but it will cause the thermal expansion deformation of the shaft system to be unable to be released, resulting in uneven wear of the rollers. It is difficult to achieve both goals at the same time.

[0006] To achieve the above objectives, the present invention provides an adaptive cylindrical roller bearing for a sludge thin-layer dryer, comprising: Inner circle; Double-row cylindrical rollers are disposed on the outer periphery of the inner ring; A solid cage is disposed between the two rows of cylindrical rollers to separate the two rows of cylindrical rollers; The outer ring is fitted around the outside of the double-row cylindrical rollers, and the outer circumferential surface of the outer ring is a convex spherical surface; A self-aligning seat ring is fitted onto the outer side of the outer ring, and the inner circumferential surface of the self-aligning seat ring is a concave spherical surface that mates with the convex spherical surface; An adaptive self-aligning limiting component includes a convex spherical groove formed on the convex spherical surface of the outer ring, a concave spherical groove formed on the concave spherical surface of the self-aligning seat ring and corresponding to the position of the convex spherical groove, an air bladder disposed between the convex spherical groove and the concave spherical groove, and a plurality of guide holes penetrating the internal roller region of the bearing and the convex spherical groove, for adjusting the degree of self-alignment between the outer ring and the self-aligning seat ring according to the bearing temperature change.

[0007] Furthermore, the convex spherical groove and the concave spherical groove are joined to form an annular cavity, and the airbag is disposed within the annular cavity.

[0008] Furthermore, the airbag is sealed with gas. In a cold state, the airbag contracts, creating a gap between the outer ring and the self-aligning seat ring at the annular cavity, allowing the outer ring to deflect within a first angular range. In a hot state, the airbag expands to fill the gap, causing the outer ring to deflect relative to the self-aligning seat ring. The airbag is compressed, generating an elastic reaction force that limits the deflection angle of the outer ring to a second angular range.

[0009] Furthermore, the airbag is also filled with a low-boiling-point liquid. In a cold state, the low-boiling-point liquid remains liquid, and in a hot state, the low-boiling-point liquid vaporizes to increase the internal pressure of the airbag, causing the airbag to expand and fit tightly against the groove wall of the annular cavity.

[0010] Furthermore, the guide holes are evenly distributed along the circumference of the convex spherical groove. The guide holes are opened in the wall of the outer ring. One end of the guide hole extends to the inner circumferential raceway side of the outer ring, and the other end extends to the convex spherical groove.

[0011] Furthermore, in the cold state, the grease inside the bearing has a high viscosity and does not flow out significantly; in the hot state, the grease viscosity decreases, and some grease flows out through the guide hole to the surface of the air bladder to form a lubricating film, allowing the outer ring to produce a small amount of elastic sliding in the limited state.

[0012] Furthermore, the expansion and contraction of the airbag and the slight elastic sliding allowed by the lubricating film constitute a self-regulating balance.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention sets an annular cavity formed by the mating of a convex spherical groove and a concave spherical groove on the spherical mating surface of the outer ring and the self-aligning seat ring, and sets an air bag in the annular cavity. The self-aligning degree of freedom between the outer ring and the self-aligning seat ring is adjusted according to the bearing temperature change, and the grease is guided to flow out to the surface of the air bag to form a lubricating film through the guide hole in the hot state. This satisfies the requirements of large angle compensation in the installation state and small angle limit in the running state, and realizes the self-adjusting balance of tightening and loosening.

[0014] In particular, the present invention adjusts the fit clearance between the outer ring and the self-aligning seat ring by expanding or contracting the gas sealed inside the airbag as the bearing temperature changes. This avoids the problem that existing self-aligning bearings with fixed clearance cannot adapt to the hot and cold state transitions of equipment, thus realizing the adaptive adjustment of the self-aligning degree of freedom according to the operating state.

[0015] In particular, the present invention guides the grease to flow out to the surface of the air bladder under hot conditions through the guide hole to form a lubricating film, allowing the outer ring to produce a small amount of elastic sliding in the limited state. This avoids the problem of roller wear caused by the inability to release the thermal expansion deformation of the shaft due to the limited movement. This improves the operating reliability of the bearing in the limited state.

[0016] In particular, the present invention guides the grease to the convex spherical groove through the guide hole. The outflowing grease diffuses along the gap between the spherical mating surface between the outer ring and the self-aligning seat ring. The grease is pumped from inside the bearing to the spherical mating surface through the guide hole by the cycle of compression when the outer ring deflects and rebound when the deflection is eliminated, thereby providing continuous lubrication to the spherical sliding interface.

[0017] In particular, the present invention stores elastic potential energy when the airbag is deflected and compressed in a hot state, and after the deflection is eliminated, the rebound drives the outer ring back to the neutral position, thereby assisting the bearing in tracking the center of the shaft system during operation.

[0018] In particular, the present invention maintains the stability of the limiting force by automatically balancing the two temperature-driven effects of the airbag expanding and tightening due to heat and the lubricating grease flowing out and relaxing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the adaptive cylindrical roller bearing for a sludge thin-layer dryer as described in this invention. Figure 2 This is a cross-sectional schematic diagram of the adaptive cylindrical roller bearing for the sludge thin-layer dryer described in this invention under cold operating conditions. Figure 3 This is a cross-sectional schematic diagram of the adaptive cylindrical roller bearing for the sludge thin-layer dryer described in this invention under hot working conditions. Figure 4This is a top view of the adaptive cylindrical roller bearing for a sludge thin-layer dryer as described in this invention; In the diagram: 1. Inner ring; 2. Double row cylindrical rollers; 3. Solid cage; 4. Outer ring; 5. Self-aligning seat; 6. Air bladder; 7. Flow guide hole; 8. Annular cavity. Detailed Implementation

[0020] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0021] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0022] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0023] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] Please see Figures 1-4 As shown, Figure 1 This is a schematic diagram of the adaptive cylindrical roller bearing for a sludge thin-layer dryer as described in this invention. Figure 2 This is a cross-sectional schematic diagram of the adaptive cylindrical roller bearing for the sludge thin-layer dryer described in this invention under cold operating conditions. Figure 3 This is a cross-sectional schematic diagram of the adaptive cylindrical roller bearing for the sludge thin-layer dryer described in this invention under hot working conditions. Figure 4 This is a top view of the adaptive cylindrical roller bearing for a sludge thin-layer dryer according to the present invention. The adaptive cylindrical roller bearing for a sludge thin-layer dryer according to an embodiment of the present invention includes: Inner circle 1; Double-row cylindrical rollers 2 are disposed on the outer periphery of the inner ring 1; A solid retainer 3 is disposed between the double-row cylindrical rollers 2 to separate the double-row cylindrical rollers 2; Outer ring 4 is fitted around the outside of the double-row cylindrical rollers 2, and the outer circumferential surface of the outer ring 4 is a convex spherical surface; The self-aligning seat 5 is sleeved on the outside of the outer ring 4, and the inner circumferential surface of the self-aligning seat 5 is a concave spherical surface that mates with the convex spherical surface. The adaptive self-aligning limiting component includes a convex spherical groove formed on the convex spherical surface of the outer ring 4, a concave spherical groove formed on the concave spherical surface of the self-aligning seat ring 5 and corresponding to the position of the convex spherical groove, an air bladder 6 disposed between the convex spherical groove and the concave spherical groove, and a plurality of guide holes 7 penetrating the roller area inside the bearing and the convex spherical groove. The convex spherical groove and the concave spherical groove are matched to form an annular cavity 8. The airbag 6 is disposed in the annular cavity 8 and is sealed with gas. When cold, the airbag 6 contracts to create a gap between the outer ring 4 and the self-aligning seat ring 5 in the annular cavity 8, allowing the outer ring 4 to deflect within a first angular range. When hot, the airbag 6 expands to fill the gap, limiting the deflection angle of the outer ring 4 to a second angular range.

[0025] Specifically, this invention provides an annular cavity 8 formed by the mating of a convex spherical groove and a concave spherical groove on the spherical mating surface of the outer ring 4 and the self-aligning seat ring 5, and an airbag 6 is placed inside the annular cavity 8. In the cold state, the airbag 6 contracts, creating a gap between the outer ring 4 and the self-aligning seat ring 5 at the annular cavity 8, allowing the outer ring 4 to freely deflect within a first angular range to compensate for installation errors. In the hot state, the gas inside the airbag 6 expands due to heat, filling the gap and limiting the deflection angle of the outer ring 4 to a second angular range. Furthermore, the grease is guided out through the guide hole 7 in the hot state to flow to the surface of the airbag 6 to form a lubricating film, allowing for a small amount of elastic sliding. This satisfies the requirements of large-angle compensation in the installation state and small-angle limiting in the running state, avoiding roller wear caused by excessive limiting, and achieving self-adjusting balance between tightening and loosening.

[0026] In particular, the present invention adjusts the fit clearance between the outer ring 4 and the self-aligning seat ring 5 by expanding or contracting the gas sealed inside the airbag 6 as the bearing temperature changes. This avoids the problem that existing self-aligning bearings with fixed clearance cannot adapt to the cold and hot state transition of equipment, thus realizing the adaptive adjustment of the self-aligning degree of freedom according to the operating state.

[0027] In particular, the present invention guides the grease to flow out to the surface of the air bag 6 under hot conditions through the guide hole 7 to form a lubricating film, allowing the outer ring 4 to produce a small amount of elastic sliding in the limited state. This avoids the problem of roller wear caused by the inability to release the thermal expansion deformation of the shaft due to the limited movement. This improves the operating reliability of the bearing in the limited state.

[0028] In particular, the present invention guides the grease to the convex spherical groove through the guide hole 7, and the outflowing grease diffuses along the gap between the spherical mating surface between the outer ring 4 and the self-aligning seat ring 5, thereby providing lubrication to the spherical sliding interface.

[0029] In particular, the present invention achieves continuous lubrication supply to the spherical sliding interface by circulating the grease through the guide hole 7 from inside the bearing to the spherical mating surface through the compression of the airbag 6 when the outer ring 4 deflects and the rebound when the deflection is eliminated.

[0030] In particular, the present invention stores elastic potential energy when the airbag 6 is deflected and compressed in a hot state. After the deflection is eliminated, the outer ring 4 rebounds and returns to the neutral position, thereby assisting the bearing in tracking the center of the shaft system during operation.

[0031] In particular, the present invention maintains the stability of the limiting force by automatically balancing the two temperature-driven effects of the airbag 6 expanding and tightening due to heat and the lubricating grease flowing out and relaxing.

[0032] In this embodiment, the inner ring 1 is fitted onto the main shaft journal of the sludge thin-layer dryer, and the outer circumferential surface of the inner ring 1 is provided with a cylindrical raceway. The double-row cylindrical rollers 2 are disposed on the outer circumference of the inner ring 1, with the two rows of cylindrical rollers arranged axially at intervals, respectively contacting the cylindrical raceway of the inner ring 1 and the inner circumferential raceway of the outer ring 4. The solid retainer 3 is disposed between the double-row cylindrical rollers 2 to separate and maintain the spacing between the cylindrical rollers. The outer ring 4 is fitted onto the outside of the double-row cylindrical rollers 2, and the inner circumferential surface of the outer ring 4 is provided with a cylindrical raceway that mates with the double-row cylindrical rollers 2. The outer circumferential surface of the outer ring 4 is a convex spherical surface. The self-aligning seat 5 is fitted onto the outside of the outer ring 4, and the inner circumferential surface of the self-aligning seat 5 is a concave spherical surface that mates with the convex spherical surface. The self-aligning seat 5 is installed in the bearing housing of the sludge thin-layer dryer.

[0033] In this embodiment, during operation of the sludge thin-layer dryer, high-temperature steam is transmitted to the inner side of the bearing through the main shaft. The bearing housing is equipped with a water-cooling structure to control the temperature rise on the outer side of the bearing, and a temperature gradient exists between the inner and outer sides of the bearing. The bearing has two operating states: a cold state corresponds to the installed state or the shutdown state, where the bearing is at room temperature; the hot state corresponds to the operating state, where the heat transmitted from the main shaft and the frictional heat generated by the double-row cylindrical rollers 2 raise the bearing to the operating temperature. The temperature at the location of the airbag 6 is lower than the temperature on the main shaft side but higher than room temperature.

[0034] In this embodiment, the convex spherical groove is circumferentially formed on the convex spherical surface of the outer ring 4, and the concave spherical groove is circumferentially formed on the concave spherical surface of the self-aligning seat ring 5. The convex and concave spherical grooves are positioned correspondingly. The outer ring 4 is assembled onto the self-aligning seat ring 5, and the convex and concave spherical grooves mate to form an annular cavity 8. The airbag 6 is disposed within the annular cavity 8, and the airbag 6 is sealed with gas. In the cold state, the airbag 6 contracts, and there is a gap between the outer surface of the airbag 6 and the groove wall of the annular cavity 8. The outer ring 4 can deflect relative to the self-aligning seat 5 within a first angle range to compensate for installation errors and initial misalignment. In the hot state, the gas inside the airbag 6 expands due to heat, and the outer surface of the airbag 6 is in close contact with the groove wall of the annular cavity 8. The outer ring 4 deflects relative to the self-aligning seat 5, and the airbag 6 is compressed to generate elastic reaction force, which limits the deflection angle of the outer ring 4 to a second angle range to avoid excessive deflection causing the dryer blades to hit the inner wall of the housing.

[0035] Specifically, the present invention uses the airbag 6 disposed in the annular cavity 8. In the cold state, the airbag contracts to create a gap between the outer surface and the groove wall, allowing the outer ring 4 to deflect freely. In the hot state, the airbag expands and adheres tightly to the groove wall to generate an elastic reaction force to restrict the deflection. Thus, a single elastic body can simultaneously achieve both the cold state of free self-alignment and the hot state of limiting position.

[0036] Optionally, the first angle range is determined based on the self-aligning compensation required for the installation of the sludge thin-layer dryer, and the second angle range is determined based on the limitation of the bearing deflection angle by the gap between the dryer's blades and the inner wall of the housing. The air bladder 6 can be made of fluororubber or silicone rubber, and the cross-sectional shape of the air bladder 6 can be circular, elliptical, or rectangular. The cross-sectional shapes of the convex spherical groove and the concave spherical groove can be rectangular, semi-circular, or trapezoidal. The inflation pressure of the gas inside the air bladder 6 can be determined based on the bearing's operating temperature range and the required limiting force.

[0037] In this embodiment, metal sheets are also provided on the pressure-bearing surfaces at both ends of the airbag 6. When the airbag 6 expands and squeezes the annular cavity 8 and the outer ring 4 slides relative to the self-aligning seat ring 5, the metal sheets provide auxiliary pressure to extend the service life of the airbag 6.

[0038] Optionally, the metal sheet can be an integral ring or segmented, and the material can be 65Mn spring steel or 304 stainless steel, or it can be replaced with non-metallic materials such as PEEK. The thickness can be determined based on the actual working conditions and operating environment, and is not limited here.

[0039] In this embodiment, the airbag 6 is also provided with a low-boiling-point liquid. In a cold state, the low-boiling-point liquid remains in a liquid state, and in a hot state, the low-boiling-point liquid vaporizes to increase the internal pressure of the airbag 6, causing the airbag 6 to expand and fit tightly against the groove wall of the annular cavity 8.

[0040] Optionally, the low-boiling-point liquid may be n-pentane or pentafluorobutane, the specific type being determined based on the operating temperature range. The filling amount of the low-boiling-point liquid can be determined based on the volume of the gasbag 6 and the operating temperature range, so that the low-boiling-point liquid remains liquid and the gasbag 6 contracts in the cold state, and the low-boiling-point liquid vaporizes in the hot state, causing the gasbag 6 to expand and adhere tightly to the tank wall. The specific type and filling amount are not limited here. The boiling point of the low-boiling-point liquid is lower than the hot temperature of the location of the gasbag 6, which is not limited here.

[0041] In this embodiment, the guide holes 7 are evenly distributed circumferentially along the convex spherical groove. The guide holes 7 are formed within the wall of the outer ring 4. One end of the guide hole 7 extends to the inner circumferential raceway side of the outer ring 4, and the other end extends to the convex spherical groove. In the cold state, the grease inside the bearing has a high viscosity and does not flow out significantly. In the hot state, the grease viscosity decreases, and some grease flows out through the guide holes 7 to the surface of the air bladder 6 to form a lubricating film. This allows the outer ring 4 to produce a small amount of elastic sliding in the limited state, so as to form a self-adjusting balance with the expansion and contraction of the air bladder 6.

[0042] Specifically, the present invention achieves temperature-controlled grease flow by matching the aperture of the guide hole 7 with the viscosity-temperature characteristics of the grease. In the cold state, the high viscosity of the grease prevents it from passing through the guide hole 7, while in the hot state, the viscosity of the grease decreases and it can flow out through the guide hole 7. Thus, the grease can flow out under temperature control without the need for an additional power source.

[0043] Optionally, the number and diameter of the guide holes 7 can be determined based on the viscosity-temperature characteristics of the grease and the volume of the annular cavity 8, and are not limited here.

[0044] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An adaptive cylindrical roller bearing for a sludge thin-layer dryer, characterized in that, include: Inner circle; Double-row cylindrical rollers are disposed on the outer periphery of the inner ring; A solid cage is disposed between the two rows of cylindrical rollers to separate the two rows of cylindrical rollers; The outer ring is fitted around the outside of the double-row cylindrical rollers, and the outer circumferential surface of the outer ring is a convex spherical surface; A self-aligning seat ring is fitted onto the outer side of the outer ring, and the inner circumferential surface of the self-aligning seat ring is a concave spherical surface that mates with the convex spherical surface; An adaptive self-aligning limiting component includes a convex spherical groove on the convex spherical surface of the outer ring, a concave spherical groove on the concave spherical surface of the self-aligning seat ring corresponding to the position of the convex spherical groove, an air bladder disposed between the convex spherical groove and the concave spherical groove, and a plurality of guide holes penetrating the internal roller region of the bearing and the convex spherical groove, for adjusting the degree of self-alignment between the outer ring and the self-aligning seat ring according to the bearing temperature change.

2. The adaptive cylindrical roller bearing for a sludge thin-layer dryer according to claim 1, characterized in that, The convex spherical groove and the concave spherical groove mate to form an annular cavity, and the airbag is disposed within the annular cavity.

3. The adaptive cylindrical roller bearing for a sludge thin-layer dryer according to claim 2, characterized in that, The airbag is sealed with gas. When cold, the airbag contracts, creating a gap between the outer ring and the self-aligning seat ring at the annular cavity, allowing the outer ring to deflect within a first angular range.

4. The adaptive cylindrical roller bearing for a sludge thin-layer dryer according to claim 3, characterized in that, When heated, the airbag expands to fill the gap, the outer ring deflects relative to the self-aligning seat ring, and the airbag is compressed to generate an elastic reaction force, which limits the deflection angle of the outer ring to a second angle range.

5. The adaptive cylindrical roller bearing for a sludge thin-layer dryer according to claim 3, characterized in that, The airbag is also filled with a low-boiling-point liquid. In a cold state, the low-boiling-point liquid remains liquid, and in a hot state, the low-boiling-point liquid vaporizes to increase the internal pressure of the airbag, causing the airbag to expand and fit tightly against the groove wall of the annular cavity.

6. The adaptive cylindrical roller bearing for a sludge thin-layer dryer according to claim 2, characterized in that, The guide holes are evenly distributed along the circumference of the convex spherical groove. The guide holes are opened in the wall of the outer ring. One end of the guide hole extends to the inner circumferential raceway side of the outer ring, and the other end extends to the convex spherical groove.

7. The adaptive cylindrical roller bearing for a sludge thin-layer dryer according to claim 6, characterized in that, In a cold state, the grease inside the bearing has a high viscosity and does not flow out significantly; in a hot state, the grease viscosity decreases, and some of the grease flows out through the guide hole to the surface of the air bladder.

8. The adaptive cylindrical roller bearing for a sludge thin-layer dryer according to claim 7, characterized in that, The grease flows out to the surface of the airbag to form a lubricating film.

9. The adaptive cylindrical roller bearing for a sludge thin-layer dryer according to claim 8, characterized in that, The lubricating film allows the outer ring to produce a small amount of elastic sliding under the limiting state.

10. The adaptive cylindrical roller bearing for a sludge thin-layer dryer according to claim 9, characterized in that, The expansion and contraction of the airbag and the slight elastic sliding allowed by the lubricating film form a self-regulating balance.

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