A positioning device for rotary kiln riding wheel tiles

Abstract

The application provides a positioning device for a rotary kiln riding wheel tile, and belongs to the technical field of cement production equipment. The device comprises a riding wheel seat shell, a ball seat coaxially arranged on the inner side of the riding wheel seat shell, and a riding wheel tile coaxially arranged on the inner side of the ball seat. The positioning device further comprises a positioning assembly, which comprises a pressing plate used for fixing the riding wheel tile on the ball seat. The pressing plate is in clearance fit with the riding wheel seat shell, so that the ball seat can swing relative to the riding wheel seat shell during the operation of the rotary kiln. The top of the pressing plate is provided with a positioning block, and a pin shaft is arranged between the positioning block and the riding wheel seat shell. The pin shaft is in clearance fit with the riding wheel seat shell and the positioning block. The application adopts an integral pressing plate structure, and a large-area contact is formed between the pressing plate and the riding wheel tile. When the riding wheel is stressed, the pressure is uniformly transmitted to the entire contact surface through the integral pressing plate, so that the local stress concentration phenomenon is eliminated, and the problems of deformation of the pressing plate during the operation or easy pulling out of the bolts on the single pressing plate under abnormal stress are prevented.

Description

Technical Field

[0001] This invention relates to the field of cement production equipment technology, and specifically to a positioning device for rotary kiln support rollers. Background Technology

[0002] In new dry-process cement production lines, the rotary kiln is one of the core pieces of equipment, and its roller system plays a crucial role in supporting the kiln body and transferring loads. In existing roller systems, the roller bearings are typically fixed to the ball seat by pressure plates. These pressure plates are single-unit structures, consisting of three small pressure plates on each side, each secured by two M20 high-strength bolts. However, due to factors such as raw materials, coal quality, and operator skill during cement clinker production, the rotary kiln rollers are subjected to complex axial and radial alternating forces during operation. Furthermore, the ball seat is often made of cast iron, which has relatively low strength. This leads to deformation of the individual small pressure plates under long-term uneven stress, loosening of bolts, and even complete pull-out. In severe cases, this can cause the roller bearings to flip out, resulting in equipment damage, prolonged downtime for maintenance, and high costs for spare parts replacement. Therefore, there is a need for a more reliable roller bearing fixing device with more even stress distribution to ensure the long-term stable operation of the rotary kiln system. Summary of the Invention

[0003] This invention provides a positioning device for rotary kiln support rollers. By using an integrally machined pressure plate, the force-bearing area of ​​the pressure plate is increased, preventing the pressure plate from deforming during operation or the bolts on a single pressure plate from being easily pulled out as a whole when subjected to abnormal force.

[0004] A positioning device for rotary kiln support rollers, comprising: Roller housing; The ball seat is coaxially disposed inside the housing of the roller support, and the roller bearing is coaxially disposed inside the ball seat. The positioning assembly includes a pressure plate for fixing the support roller bearing to the ball seat. The pressure plate is clearance-fitted with the support roller seat housing, enabling the ball seat to swing relative to the support roller seat housing during the operation of the rotary kiln.

[0005] Preferably, the pressure plate is provided with a positioning block on its top, and a pin is provided between the positioning block and the support roller housing.

[0006] Preferably, the pin is clearance-fitted with the roller housing and the positioning block.

[0007] Preferably, the positioning block has a positioning hole that mates with the pin.

[0008] Preferably, the pressure plate is fixedly connected to the ball seat by a plurality of fasteners.

[0009] Preferably, the fastener is a bolt, which passes through a through hole in the pressure plate and is screwed into a threaded hole in the ball seat.

[0010] Preferably, the pressure plate is an integral structure.

[0011] Preferably, the pressure plate includes a base and a protruding expansion extending outward from the base, wherein the protruding expansion has an arc surface on the side away from the base that mates with the inner side of the roller seat housing.

[0012] Preferably, the lower surface of the pressure plate is provided with an extrusion surface, which is in contact with the upper surface of the support roller bearing, and the center line of the extrusion surface is aligned with the center line of the support roller bearing.

[0013] Preferably, the pressure plate is made of a single piece of metal material.

[0014] As can be seen from the above technical solutions, the present invention has the following beneficial effects: 1. In this invention, an integral pressure plate structure is adopted, forming a large-area surface contact between the pressure plate and the support roller bearing. When the support roller is under force, the pressure is evenly transmitted to the entire contact surface through the integral pressure plate, eliminating local stress concentration and significantly improving the load-bearing capacity and deformation resistance of the pressure plate.

[0015] 2. In this invention, the pressure plate and the support roller housing are clearance-fitted. Specifically, the pin is used to movably connect the ball seat to the support roller housing. That is, the pin, the support roller housing, and the pressure plate are clearance-fitted, so that the ball seat can automatically adjust itself within a certain range. In this way, when the axis of the support roller changes, the ball seat can swing slightly accordingly, always maintaining good contact between the support roller bearing and the support roller, reducing abnormal stress, and extending the service life of the equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the installation structure of the present invention; Figure 2 This is a schematic diagram of the pressure plate; Figure 3 This is a schematic diagram of the connection between the pressure plate and the positioning block; Figure 4 for Figure 3 Top view.

[0017] In the figure: 10, support roller housing; 20, ball seat; 30, support roller bearing; 410, pressure plate; 411, base; 412, protruding part; 420, positioning block; 421, positioning hole; 430, pin; 50, support roller. Detailed Implementation

[0018] A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0019] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions: (Refer to...) Figure 1 , Figure 2A positioning device for a rotary kiln support roller bearing includes a support roller housing 10, a ball seat 20, a support roller bearing 30, and a positioning assembly. The ball seat 20 is coaxially disposed inside the support roller housing 10, and the support roller bearing 30 is coaxially disposed inside the ball seat 20. The positioning assembly includes a pressure plate 410, which is used to fix the support roller bearing 30 onto the ball seat 20. It should be noted that the ball seat 20 supports the support roller bearing 30, and the pressure plate 410 presses and fixes the support roller bearing 30 onto the ball seat 20. Simultaneously, the pressure plate 410 and the support roller housing 10 have a clearance fit, allowing the ball seat 20 to swing relative to the support roller housing 10 during rotary kiln operation. In use, the integral pressure plate 410 tightly presses the support roller bearing 30. The pressure plate 410 is fixed to the ball seat 20, and the large-area contact and multi-point fastening are used to stably lock the support roller 30, preventing the support roller 30 from shifting or overturning during operation. At the same time, the pressure plate 410 is movably connected to the support roller seat housing 10, allowing the ball seat 20 to swing freely within a certain angle range. When the axis of the support roller 50 changes due to factors such as cylinder deformation during the operation of the rotary kiln, the ball seat 20 can automatically adjust its posture to always maintain the optimal contact state between the support roller 30 and the support roller 50. This ensures the long-term stable and reliable operation of the rotary kiln system and prevents the problems of deformation of the pressure plate 410 or the easy pull-out of the two M20 bolts of a single pressure plate 410 when subjected to abnormal force, which are common in the prior art.

[0020] Reference Figure 3 , Figure 4 As a preferred technical solution in this embodiment, the pressure plate 410 is provided with a positioning block 420 on its top. A pin 430 is provided between the positioning block 420 and the support roller housing 10, and the pin 430 is clearance-fitted with the support roller housing 10 and the positioning block 420. In use, the pin 430 passes through the corresponding holes in the positioning block 420 and the support roller housing 10, movably connecting the two. Furthermore, the clearance fit between the pin 430 and the holes in the support roller housing 10 and the positioning block 420 allows the ball seat 20 to swing freely around the pin 430 within a certain angle range. When the axis of the support roller 50 changes due to deformation of the kiln shell during operation, the ball seat 20 automatically adjusts its posture through this clearance fit, causing the support roller bearing 30 to follow the axis change of the support roller 50, always maintaining optimal contact. While achieving self-aligning function, it also avoids abnormal local wear caused by rigid fixing, thereby improving the operational stability of the support roller 50.

[0021] Furthermore, in order to achieve a clearance fit between the pin 430 and the positioning block 420, a positioning hole 421 is provided on the positioning block 420, and the positioning hole 421 is clearance fitted with the pin 430.

[0022] In some embodiments, the pressure plate 410 is fixedly connected to the ball seat 20 by multiple fasteners. Further, the fasteners are bolts, which pass through through holes in the pressure plate 410 and are screwed into threaded holes in the ball seat 20. This multi-bolt fixing allows for uniform, multi-point fastening of the pressure plate 410 and the ball seat 20. When the support roller bearing 30 is compressed, the pressure plate 410 transmits pressure evenly to the ball seat 20 through large-area contact, avoiding localized pressure concentration. Simultaneously, the multiple bolts work together to provide a secure connection; even if individual bolts loosen under extreme conditions, the remaining bolts can still lock the pressure plate 410, preventing displacement or overturning of the support roller bearing 30. This solves the problems of deformation, bolt pull-out, and even overturning of the support roller bearing 30 caused by concentrated force on a single small pressure plate in the prior art, thereby improving equipment safety.

[0023] In addition, refer to Figure 3 , Figure 4 The pressure plate 410 is an integral structure, and includes a base 411 and a protruding expansion 412. The base 411 is a strip-shaped structure, and the protruding expansion 412 extends outward from the base 411. The side of the protruding expansion 412 away from the base 411 has an arc surface that mates with the inner side of the roller support housing 10. In use, the bottom of the base 411 and the protruding expansion 412 can contact the ball seat 20, and the protruding expansion 412 can contact the inner side of the roller support housing 10. Then, fasteners are used to fix the pressure plate 410 to the ball seat 20, and pins 430 are used to movably connect the pressure plate 410 to the roller support housing 10.

[0024] In some embodiments, the lower surface of the pressure plate 410 is provided with a pressing surface, which contacts the upper surface of the support roller bearing 30. Simultaneously, the centerline of the pressing surface is aligned with the centerline of the support roller bearing 30. This ensures that the fixing force applied by the pressure plate 410 is symmetrically distributed along the central axis of the support roller bearing 30, resulting in balanced force distribution on the support roller bearing 30 and preventing localized wear caused by uneven force distribution. Furthermore, the surface contact between the pressing surface and the upper surface of the support roller bearing 30 further disperses pressure, reduces stress concentration, and significantly improves the fixing stability and operational reliability of the support roller bearing 30.

[0025] It should be noted that the pressure plate 410 is a one-piece structure, manufactured entirely from metal. Because of this integral design and manufacturing process, the gaps and stress interruptions between traditional split pressure plates are eliminated. During operation, the one-piece pressure plate can evenly distribute pressure across the entire contact surface of the support roller bearing 30, avoiding localized deformation caused by uneven stress in split structures. Furthermore, the integral manufacturing process enhances the structural strength of the pressure plate 410, preventing equipment malfunctions caused by its breakage or failure.

[0026] The working principle of this invention is as follows: The roller bearing 30 is fixed to the ball seat 20 by a combination of an integral pressure plate 410 and multiple bolts. The pressure plate 410, through its surface contact with the upper surface of the roller bearing 30 and its centerline alignment design, ensures a uniform and symmetrical distribution of fixing force, avoiding localized stress concentration. Simultaneously, the pressure plate 410, through a pin 430 and a clearance fit with the hole in the roller seat housing 10, allows the ball seat 20 to swing freely within a certain angle range. This allows it to automatically adjust its posture according to the changes in the axis of the roller 50 during rotary kiln operation, maintaining optimal contact between the roller bearing 30 and the roller 50. The integral pressure plate 410 improves structural strength, ensuring long-term stable and reliable operation of the rotary kiln system. It prevents pressure plate deformation during rotary kiln operation, or the easy pull-out of a single pressure plate and two M20 bolts under abnormal stress, as seen in existing technologies. This solves the problems of deformation, bolt pull-out, and even roller bearing 30 flipping out due to stress concentration in single small pressure plates in existing technologies, thereby improving equipment safety.

[0027] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A positioning device for rotary kiln support rollers, characterized in that, include: Roller housing (10); The ball seat (20) is coaxially disposed inside the roller seat housing (10), and the roller bearing (30) is coaxially disposed inside it. The positioning assembly includes a pressure plate (410) for fixing the roller bearing (30) to the ball seat (20), the pressure plate (410) being clearance-fitted with the roller seat housing (10) to allow the ball seat (20) to swing relative to the roller seat housing (10) during the operation of the rotary kiln.

2. The positioning device for rotary kiln support rollers according to claim 1, characterized in that, The pressure plate (410) is provided with a positioning block (420) on the top, and a pin (430) is provided between the positioning block (420) and the roller seat housing (10).

3. The positioning device for rotary kiln support rollers according to claim 2, characterized in that, The pin (430) is fitted with the roller seat housing (10) and the positioning block (420) with clearance.

4. The positioning device for rotary kiln support rollers according to claim 3, characterized in that, The positioning block (420) has a positioning hole (421) that mates with the pin (430).

5. The positioning device for rotary kiln support rollers according to claim 1, characterized in that, The pressure plate (410) is fixedly connected to the ball seat (20) by a plurality of fasteners.

6. The positioning device for rotary kiln support rollers according to claim 5, characterized in that, The fastener is a bolt, which passes through a through hole on the pressure plate (410) and is screwed into a threaded hole on the ball seat (20).

7. The positioning device for rotary kiln support rollers according to claim 4, characterized in that, The pressure plate (410) is an integral structure.

8. The positioning device for rotary kiln support rollers according to claim 7, characterized in that, The pressure plate (410) includes a base (411) and a protruding portion (412) extending outward from the base (411). The protruding portion (412) has an arc surface on the side away from the base (411) that mates with the inner side of the roller seat housing (10).

9. The positioning device for rotary kiln support rollers according to claim 1, characterized in that, The lower surface of the pressure plate (410) is provided with an extrusion surface, which is in contact with the upper surface of the support roller (30), and the center line of the extrusion surface is aligned with the center line of the support roller (30).

10. The positioning device for rotary kiln support rollers according to claim 1, characterized in that, The pressure plate (410) is made of metal material as a whole.

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