Thrust roller of rotary kiln

Abstract

The utility model provides a rotary kiln thrust roller, which is mounted on a rotary kiln barrel and comprises a roller body, a self-aligning ball bearing, a cylindrical roller bearing, a bearing seat and a sealing component, the self-aligning ball bearing and the cylindrical roller bearing are sequentially arranged on the bearing seat, and the roller body is rotatably mounted on the bearing seat through the self-aligning ball bearing and the cylindrical roller bearing. And the self-aligning ball bearing is arranged close to the end part of the roller body. According to the utility model, on one hand, the self-aligning ball bearing is arranged to support the axial force of the rotary kiln cylinder body, and on the other hand, the cylindrical roller bearing is arranged to provide higher radial bearing capacity for the rotary kiln cylinder body and ensure that the thrust roller can stably support the cylinder body in the radial direction; by means of the mode that the self-aligning ball bearings and the cylindrical roller bearings are combined, the thrust roller can comprehensively cope with axial force and radial force generated by a rotary kiln barrel, stable operation and working efficiency of a rotary kiln are guaranteed, and meanwhile adaptability and reliability of the thrust roller are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical engineering, in particular to a rotary kiln thrust roller. Background Art

[0002] In industrial production, rotary kiln is an important equipment, widely used in cement, metallurgy, chemical industry and other industries. As one of the key components of rotary kiln, the performance and reliability of thrust roller directly affect the overall operation of rotary kiln.

[0003] The thrust rollers are usually installed at the feed and discharge ends of the kiln. Each set of thrust rollers consists of two or more rollers arranged symmetrically. During the operation of the rotary kiln, the axial thrust of the kiln is transmitted to the thrust rollers through the supporting rollers, and the thrust rollers then transmit the axial thrust to the foundation. With the continuous improvement of production needs and the development and progress of technology, the requirements for the thrust rollers of rotary kilns are also getting higher and higher. The existing thrust rollers have problems such as insufficient rotation and insufficient load-bearing capacity, which in turn affects the material handling efficiency of the rotary kiln.

[0004] Therefore, it is necessary to design a rotary kiln thrust roller to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a rotary kiln thrust roller which has both axial and radial supporting forces and operates stably.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a rotary kiln thrust roller, installed on the rotary kiln cylinder, which includes a roller body, a self-aligning ball bearing, a cylindrical roller bearing, a bearing seat and a sealing assembly, the self-aligning ball bearing and the cylindrical roller bearing are arranged on the bearing seat in sequence, the roller body is rotatably installed on the bearing seat through the self-aligning ball bearing and the cylindrical roller bearing, and the self-aligning ball bearing is arranged near the end of the roller body.

[0007] As a further improved technical solution of the utility model, the self-aligning ball bearing comprises an inner ring, an outer ring, rolling elements and a retaining frame, the outer ring has a spherical raceway, and the outer ring is tightly matched with the inner side of the roller body.

[0008] As a further improved technical solution of the utility model, the cylindrical roller bearing comprises an inner ring, an outer ring, a cylindrical roller and a retaining frame, and the outer ring is tightly matched with the inner side of the roller body.

[0009] As a further improved technical solution of the utility model, it also includes a roller end cover arranged at one end of the roller body, and the front end of the roller end cover is flush with the front end of the roller body.

[0010] As a further improved technical solution of the utility model, the outer side of the end of the roller body is a conical surface, and the taper of the conical surface is 0.25-0.35.

[0011] As a further improved technical solution of the utility model, it also includes a first support ring and a second support ring arranged between the self-aligning ball bearing and the cylindrical roller bearing, the first support ring is tightly fitted with the inner side of the roller body, and the second support ring is tightly fitted with the bearing seat.

[0012] As a further improved technical solution of the utility model, the sealing assembly includes a skeleton oil seal arranged on the bearing seat.

[0013] As a further improved technical solution of the utility model, the material of the roller body is alloy steel or high manganese steel.

[0014] As a further improved technical solution of the utility model, it also includes a mounting seat, and the bearing seat is fixed on the mounting seat.

[0015] It can be seen from the above technical scheme that the rotary kiln thrust roller of the utility model provides support for the axial force of the rotary kiln cylinder through the setting of the self-aligning ball bearing. When the cylinder produces a slight displacement or deflection in the axial direction, the self-aligning ball bearing can adapt to this change to a certain extent, reduce the additional stress concentration caused by the axial force, and thus play a certain buffering and supporting role for the axial force; on the other hand, through the setting of the cylindrical roller bearing, it can not only provide a higher radial bearing capacity for the rotary kiln cylinder, but also ensure that the thrust roller can stably support the cylinder in the radial direction; in addition, the cylindrical roller bearing can also assist in sharing part of the axial force to a certain extent, and enhance the overall resistance to the axial force, while the self-aligning ball bearing can also share part of the radial force, and cooperate with the cylindrical roller bearing to make the support for the radial force more comprehensive and reliable. This combination of self-aligning ball bearings and cylindrical roller bearings combines the advantages of both, so that the thrust roller can more comprehensively cope with the axial and radial forces generated by the rotary kiln cylinder, ensuring the smooth operation and working efficiency of the rotary kiln, while also improving the adaptability and reliability of the thrust roller and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a three-dimensional diagram of a rotary kiln thrust roller according to an embodiment of the present invention.

[0017] Figure 2 for Figure 1 Cross-sectional view of the thrust roller of a rotary kiln. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Please refer to Figure 1 and Figure 2 As shown, the utility model provides a rotary kiln thrust roller, which is installed on the rotary kiln cylinder, and includes a bearing seat 10, a roller body 20, a self-aligning ball bearing 40, a cylindrical roller bearing 30, a sealing assembly 50 and a roller body end cover 60.

[0020] The bearing seat 10 specifically includes a mounting portion 11, a shaft portion 12 disposed on the mounting portion 11, and a fixing portion 13 disposed at the end of the shaft portion 12. The self-aligning ball bearing 40 and the cylindrical roller bearing 30 are sequentially disposed on the shaft portion 12, and the fixing portion 13 axially limits the self-aligning ball bearing 40 and the cylindrical roller bearing 30 on the shaft portion 12. The roller body 20 is rotatably mounted on the shaft portion 12 through the self-aligning ball bearing 40 and the cylindrical roller bearing 30, the self-aligning ball bearing 40 is disposed near the end of the roller body 20, and the cylindrical roller bearing 30 is disposed at one end of the shaft portion 12 near the mounting portion 11.

[0021] The cylindrical roller bearing 30 includes an outer ring 31, cylindrical rollers 32, an inner ring 33 and a cage, and the outer side of the outer ring 31 is tightly matched with the inner side of the roller body 20. The self-aligning ball bearing 40 includes an outer ring 41, rolling elements 42, an inner ring 43 and a cage, and the outer ring 41 has a spherical raceway, and the outer side of the outer ring 41 is tightly matched with the inner side of the roller body 20.

[0022] Furthermore, a first support ring 71 and a second support ring 72 are provided between the cylindrical roller bearing 30 and the self-aligning ball bearing 40. The first support ring 71 is tightly matched with the inner side of the roller body 20. In the axial direction, the two ends of the first support ring 71 are respectively in contact with the outer rings of the cylindrical roller bearing 30 and the self-aligning ball bearing 40; the second support ring 72 is tightly matched with the shaft portion 12. In the axial direction, the two ends of the second support ring 72 are respectively in contact with the inner rings of the cylindrical roller bearing 30 and the self-aligning ball bearing 40. In this arrangement, the cylindrical roller bearing 30 and the self-aligning ball bearing 40 are separated by the inner and outer support rings, so that the overall structure is more stable during operation, and the mutual interference that may occur between the bearings is reduced. Moreover, the two support rings can share part of the load, which helps to improve the bearing capacity of the entire bearing system; further, the space in the axial direction is reasonably utilized, so that the overall structure is compact, and the effective configuration of the two bearings is achieved in a limited space.

[0023] The outer side of the end of the roller body 20 is a conical surface, and the taper of the conical surface is 0.25-0.35. The setting of the conical surface in the above taper range makes the roller body 20 partially change the force direction of the roller body 20 when it is installed in conjunction with the rotary kiln, and can convert part of the radial force into a component force along the axial direction, thereby balancing the force magnitudes in the axial and radial directions, which helps to improve the overall stability and reliability of the thrust roller; on the other hand, the design of the conical surface increases the friction area, significantly improves the firmness and stability of the installation, reduces the risk of relative sliding, and ensures the normal operation of the equipment. Preferably, the material of the roller body 20 is alloy steel or high manganese steel, so that the roller body 20 can withstand large loads and stresses, ensuring the structural stability of the roller body during operation.

[0024] The sealing assembly 50 includes a skeleton oil seal disposed on the bearing seat 10 . Specifically, the skeleton oil seal is disposed on the shaft portion 12 , on a side of the cylindrical roller bearing 30 away from the self-aligning ball bearing 40 .

[0025] The roller end cover 60 is disposed at one end of the roller body 20, so that the end cover where the fixing portion 13 of the bearing seat 10 is located is disposed inside the roller body 20, which can provide better protection for the bearing seat and the bearing, and reduce the impact of external environmental factors on them, such as the intrusion of dust, debris, etc. The front end of the roller end cover 60 is flush with the front end of the roller body 20 to ensure that the thrust roller structure is compact.

[0026] The terms used herein, such as "inside" and "outside", indicating relative spatial positions, are used for the purpose of convenience to describe the relationship of one feature relative to another feature as shown in the drawings. It is understood that, depending on the placement of the product, the terms of relative spatial positions may be intended to include different orientations in addition to the orientation shown in the drawings, and should not be construed as limiting the claims.

[0027] In addition, the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. The understanding of this specification should be based on the technical personnel in the relevant technical field. Although this specification has described the present invention in detail with reference to the above embodiments, ordinary technical personnel in the field should understand that the technical personnel in the relevant technical field can still modify or make equivalent substitutions to the present invention, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A rotary kiln thrust roller, mounted on a rotary kiln cylinder, characterized in that: It includes a roller body, a self-aligning ball bearing, a cylindrical roller bearing, a bearing seat and a sealing assembly. The self-aligning ball bearing and the cylindrical roller bearing are arranged on the bearing seat in sequence. The roller body is rotatably mounted on the bearing seat through the self-aligning ball bearing and the cylindrical roller bearing. The self-aligning ball bearing is arranged close to the end of the roller body.

2. The rotary kiln thrust roller according to claim 1, characterized in that: The self-aligning ball bearing comprises an inner ring, an outer ring, a rolling element and a retaining frame. The outer ring has a spherical raceway and is tightly matched with the inner side of the roller body.

3. The rotary kiln thrust roller according to claim 1, characterized in that: The cylindrical roller bearing comprises an inner ring, an outer ring, a cylindrical roller and a retaining frame, and the outer ring is tightly matched with the inner side of the roller body.

4. The rotary kiln thrust roller according to claim 1, characterized in that: It also includes a roller end cover arranged at one end of the roller body, and the front end of the roller end cover is flush with the front end of the roller body.

5. The rotary kiln thrust roller according to claim 1, characterized in that: The outer side of the end of the roller body is a conical surface, and the taper of the conical surface is 0.25-0.

35.

6. The rotary kiln thrust roller according to claim 1, characterized in that: It also includes a first support ring and a second support ring which are arranged between the self-aligning ball bearing and the cylindrical roller bearing, wherein the first support ring is tightly matched with the inner side of the roller body, and the second support ring is tightly matched with the bearing seat.

7. The rotary kiln thrust roller according to claim 1, characterized in that: The sealing assembly comprises a skeleton oil seal arranged on the bearing seat.

8. The rotary kiln thrust roller according to claim 1, characterized in that: The roller body is made of alloy steel or high manganese steel.

9. The rotary kiln thrust roller according to claim 1, characterized in that: It also includes a mounting seat, and the bearing seat is fixed on the mounting seat.

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