Self-aligning sliding bearing with exchangeable wear part and method for exchanging the wear part

Abstract

The application discloses a self-aligning sliding bearing with replaceable wearing parts and an online replacement method, relates to the field of sliding bearings, and provides the self-aligning sliding bearing with replaceable wearing parts and the online replacement method, which can replace the wearing parts without disassembling a rack, a feeding device, a roller cover, a shaft coupling, a speed reducer, a locking disc and a torsion disc, greatly reduces the bearing replacement time, and improves the operation rate. The wearing condition of the bearing can be known on line to realize automatic monitoring and alarm, in addition, the self-aligning sliding bearing with replaceable wearing parts has the advantages of lower processing cost, shortened maintenance time, reduced maintenance cost, improved equipment operation rate and good economic value.

Description

Technical Field

[0001] This invention relates to the field of sliding bearings, and more specifically to a self-aligning sliding bearing with replaceable wear parts and a method for online replacement. Background Technology

[0002] Roller presses are heavy machinery, characterized by their large size, high output power, and weight ranging from tens to thousands of tons. Their structure consists of a feeding device, frame, extrusion rollers, torque support, hydraulic system, grease lubrication system, transmission device, and maintenance walkway. Currently, the core component supporting the rotation of the extrusion rollers in roller presses remains the sliding bearing.

[0003] The structural characteristics of roller presses make their maintenance relatively difficult. First, the feeding device, frame, reducer, locking disc, torque disc, coupling, and roller cover must be disassembled and placed in a safe location. Then, the extrusion rollers are transported to a dedicated maintenance position using a crane or maintenance hoist before the sliding bearings can be replaced. The process of disassembling, assembling, and replacing the sliding bearings is quite complex, requiring professional personnel to replace them according to the operating procedures. Finally, the equipment is restored in reverse order. This results in long maintenance times and high maintenance costs for roller presses. Furthermore, if the working status of the sliding bearings is not monitored online, the equipment may unexpectedly stop at any time. If users do not prepare spare parts in time, the downtime will be even longer, causing significant economic losses. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems by providing a self-aligning sliding bearing with replaceable wear parts online, along with an online replacement method. This allows for the replacement of wear parts without disassembling the frame, feeding device, roller cover, coupling, reducer, locking disc, or torque disc, significantly reducing bearing replacement time and improving operating efficiency. Furthermore, it allows for online monitoring of bearing wear, enabling automatic monitoring and alarms. Additionally, it offers advantages such as lower processing costs, shorter maintenance time, reduced maintenance costs, and increased equipment operating efficiency, demonstrating significant economic value.

[0005] The technical solution adopted in this invention is as follows:

[0006] A self-aligning sliding bearing with replaceable wear parts includes a combined bushing, a spherical bearing shell, and a bearing housing. The bearing housing includes a disassembly / assembly area and a working area in the circumferential direction. The working area and the outer surface of the spherical bearing shell are mutually mating spherical structures. The spherical bearing shell is assembled in the working area within the bearing housing to form a rolling friction pair. The spherical bearing shell is rotatable to the disassembly / assembly area, and a clearance is formed between the disassembly / assembly area and the spherical bearing shell for disassembly / assembly operations. The bushing includes a sliding sleeve and a side retaining ring detachable from one side of the sliding sleeve. The outer surface of the sliding sleeve and the inner surface of the spherical bearing shell are mutually mating cylindrical surfaces. The sliding sleeve is assembled inside the spherical bearing shell to form a sliding friction pair. The side retaining ring is assembled outside the spherical bearing shell and restricts the axial displacement of the spherical bearing shell.

[0007] Thanks to the above technical solution, worn parts can be replaced without disassembling the frame, feeding device, roller cover, coupling, reducer, locking disc, and torque disc, which greatly reduces bearing replacement time and improves operating efficiency.

[0008] Furthermore, the spherical tile is provided with adjustment grooves at both ends, and the working area is provided with a first limiting self-aligning component and a second limiting self-aligning component at both ends. The first limiting self-aligning component and the second limiting self-aligning component are respectively matched with the corresponding adjustment grooves. The first limiting self-aligning component and the second limiting self-aligning component can cooperate with each other to restrict the spherical tile from sliding in the circumferential direction, and can also make the spherical tile rotate and align relative to the bearing seat.

[0009] Furthermore, the first limiting and self-aligning assembly includes a first limiting block detachably connected to the bearing housing and a first arc-shaped self-aligning block that matches the end of the spherical tile. One side of the arc-shaped self-aligning block is in line contact with the first limiting block, and the other side abuts against the spherical tile. The first limiting and self-aligning assembly also includes a second limiting block detachably connected to the bearing housing and a second arc-shaped self-aligning block that matches the end of the spherical tile. One side of the arc-shaped self-aligning block is in line contact with the second limiting block, and the other side abuts against the spherical tile.

[0010] Furthermore, the wrap angle of the spherical tile is 160-180 degrees.

[0011] Furthermore, the line connecting the first limiting self-aligning component and the second limiting self-aligning component forms an angle of 30-60 degrees with the horizontal line, and the first limiting self-aligning component is mounted above the second limiting self-aligning component.

[0012] Thanks to the above technical solution, the spherical tile is confined to the lower part during operation, which can achieve better load-bearing effect; during disassembly and assembly, the spherical tile can be rotated to the upper disassembly and assembly area. At this time, the spherical tile is an inclined structure that forms an angle with the horizontal plane, which is conducive to disassembly and assembly operations.

[0013] Furthermore, a bearing condition monitoring device is embedded in the bearing area of ​​the spherical tile, and the bearing condition monitoring device is connected to the control system signal.

[0014] Furthermore, the bearing condition monitoring device includes an oil film temperature sensor, a wear measurement sensor, and a life prediction sensor, with multiple sets of bearing condition monitoring devices evenly distributed in the bearing area of ​​the spherical tile.

[0015] Thanks to the above technical solution, the wear condition of the bearing can be monitored online, and the worn bearing parts can be replaced in a planned manner, avoiding sudden bearing failure and causing long-term downtime for users without preparation.

[0016] Furthermore, the spherical tile includes a spherical tile base and multiple assembled tiles, the multiple assembled tiles being detachably connected to the spherical tile base and covering the inner surface of the spherical tile base.

[0017] Thanks to the above technical solutions, only worn parts need to be replaced, reducing maintenance costs; the processing volume of a single assembled tile is small, making it easier to process and produce.

[0018] Furthermore, the mounting bearing is a flexible metal-plastic bearing.

[0019] Because of the above technical solution, this material does not require scraping and has lower technical requirements for users compared to metal materials.

[0020] Accordingly, the present invention also discloses an online replacement method for self-aligning sliding bearings, comprising the following steps:

[0021] Installation steps: Remove the first limit self-aligning component, remove the side retaining ring, and install the tool on the sliding sleeve of the bushing in the disassembly and assembly area, so that the outer circle of the tool is horizontally aligned with the outer circle of the sliding sleeve.

[0022] Steps for installing a new spherical bearing: Lift the new spherical bearing and invert it onto the fixture. Push the new spherical bearing onto the sliding sleeve and fit it together. Use the fixture to connect the new spherical bearing and the old spherical bearing to the combined sliding sleeve as a whole and rotate it together with the shaft. Remove the second limit self-aligning component, rotate the shaft, and drive the new spherical bearing to rotate completely to the working area of ​​the bearing seat. Stop the shaft from rotating and install the second limit self-aligning component.

[0023] Steps for disassembling an old spherical tile: When the new spherical tile rotates to the working area, the old spherical tile rotates to the disassembly and assembly area. Install the tooling onto the sliding sleeve of the bushing in the disassembly and assembly area, pull out the old spherical tile, and lift it away.

[0024] Recovery steps: Remove the tooling, install the side retaining ring, and install the first limit self-aligning component.

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0026] 1. This invention allows for the replacement of worn parts without disassembling the frame, feeding device, roller cover, coupling, reducer, locking disc, or torque disc, greatly reducing bearing replacement time and improving operating efficiency.

[0027] 2. This invention allows for online monitoring of bearing wear, enabling planned replacement of worn bearing components and preventing sudden bearing failure that could lead to prolonged downtime for users without prior notice.

[0028] 3. This invention can replace only worn parts, reducing maintenance costs.

[0029] 4. The single-piece assembled tile of this invention has a small processing volume and is easier to process and produce. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the self-aligning sliding bearing of the present invention;

[0031] Figure 2 This is an assembly drawing of the self-aligning sliding bearing of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of the bushing of the present invention;

[0033] Figure 4 This is a schematic diagram of the spherical tile structure of the present invention;

[0034] Figure 5 This is a schematic diagram of the bearing condition monitoring device of the present invention;

[0035] Figure 6 This is a schematic diagram of the bearing housing of the present invention.

[0036] The markings in the diagram are: 1-shaft body, 2-shaft sleeve, 201-sliding sleeve, 202-side retaining ring, 3-spherical tile, 301-spherical tile base, 302-assembly tile, 4-bearing seat, 401-disassembly and assembly area, 402-working area, 5-first limiting block, 6-first arc-shaped self-aligning block, 7-second arc-shaped self-aligning block, 8-second limiting block, 9-bearing condition monitoring device. Detailed Implementation

[0037] The present invention will now be described in detail with reference to the accompanying drawings.

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0039] Example 1

[0040] A self-aligning sliding bearing with replaceable wear parts, such as Figures 1-6 As shown, the assembly includes a combined bushing 2, a spherical bearing 3, and a bearing housing 4. The bearing housing 4 includes a disassembly / assembly area 401 and a working area 402 located in the circumferential direction. The working area 402 and the outer surface of the spherical bearing 3 are mutually mating spherical structures. The spherical bearing 3 is assembled in the working area 402 within the bearing housing 4 to form a rolling friction pair. The spherical bearing 3 can rotate to the disassembly / assembly area 401. When the disassembly / assembly area 401 mates with the spherical bearing 3, a gap is formed that allows for disassembly / assembly operations. The bushing 2 includes a sliding sleeve 201 and a side retaining ring 202 that can be detached from one side of the sliding sleeve 201. The outer surface of the sliding sleeve 201 and the inner surface of the spherical bearing 3 are mutually mating cylindrical surfaces. The sliding sleeve 201 is assembled inside the spherical bearing 3 to form a sliding friction pair. The side retaining ring 202 is assembled outside the spherical bearing 3 and restricts the axial displacement of the spherical bearing 3.

[0041] Specifically, worn parts can be replaced without disassembling the frame, feeding device, roller cover, coupling, reducer, locking disc, and torque disc, greatly reducing bearing replacement time and improving operating efficiency. Preferably, the disassembly / assembly area 401 is a cylindrical surface with a radius greater than or equal to the corresponding radius of the outer surface of the spherical tile 3. It should be noted that disassembly / assembly areas 401 of other structures, as long as they allow for a gap that enables disassembly / assembly operations when mated with the spherical tile 3, are also included within the scope of this description.

[0042] The spherical tile 3 is provided with adjustment grooves at both ends, and the working area 402 is provided with a first limiting self-aligning component and a second limiting self-aligning component at both ends. The first limiting self-aligning component and the second limiting self-aligning component are respectively matched with the corresponding adjustment grooves. The first limiting self-aligning component and the second limiting self-aligning component can cooperate with each other to restrict the spherical tile 3 from sliding in the circumferential direction, and can also make the spherical tile 3 rotate and align relative to the bearing seat 4.

[0043] The first limiting and self-aligning assembly includes a first limiting block 5 detachably connected to the bearing seat 4 and a first arc-shaped self-aligning block 6 that matches the end of the spherical tile 3. One side of the arc surface of the first arc-shaped self-aligning block 6 is in line contact with the first limiting block 5, and the other side abuts against the spherical tile 3. The first limiting and self-aligning assembly includes a second limiting block 8 detachably connected to the bearing seat 4 and a second arc-shaped self-aligning block 7 that matches the end of the spherical tile 3. One side of the arc surface of the second arc-shaped self-aligning block 7 is in line contact with the second limiting block 8, and the other side abuts against the spherical tile 3.

[0044] The wrap angle of the spherical tile 3 is 175 degrees.

[0045] The line connecting the first limiting self-aligning component and the second limiting self-aligning component forms a 45-degree angle with the horizontal line, and the first limiting self-aligning component is mounted above the second limiting self-aligning component.

[0046] Specifically, during operation, the spherical tile 3 is confined to the lower part, which can achieve better load-bearing effect; during disassembly and assembly, the spherical tile 3 can be rotated to the upper disassembly and assembly area 401. At this time, the spherical tile 3 is an inclined structure that forms an angle with the horizontal plane, which is conducive to disassembly and assembly operations.

[0047] A bearing condition monitoring device 9 is embedded in the bearing area of ​​the spherical tile 3, and the bearing condition monitoring device 9 is connected to the control system signal.

[0048] The bearing condition monitoring device 9 includes an oil film temperature sensor, a wear measurement sensor, and a life prediction sensor. Multiple sets of bearing condition monitoring devices 9 are evenly distributed in the bearing area of ​​the spherical bearing 3. 3-12 sets can be set according to operating conditions.

[0049] Specifically, users can monitor bearing wear online and plan for replacement of worn bearing parts, preventing sudden bearing failure and resulting in prolonged downtime without prior notice.

[0050] The spherical tile 3 includes a spherical tile base 301 and three assembled tiles 302. The three assembled tiles 302 are detachably connected to the spherical tile base 301 and cover the inner surface of the spherical tile base 301.

[0051] Specifically, only worn parts can be replaced, reducing maintenance costs; the single-piece assembly tile 302 has a small processing volume, making it easier to process and produce.

[0052] The mounting bearing 302 is an elastic metal-plastic bearing.

[0053] Specifically, this material does not require scraping and, compared to metal materials, requires less technical skill from the user.

[0054] Example 2

[0055] A method for online replacement of a self-aligning sliding bearing includes the following steps:

[0056] Installation steps: Remove the first limit self-aligning component, remove the side retaining ring 202, and install the tooling on the sliding sleeve 201 of the bushing 2 in the disassembly and assembly area 401, so that the outer circle of the tooling is horizontally aligned with the outer circle of the sliding sleeve 201.

[0057] Steps for installing the new spherical tile 3: Lift the new spherical tile 3 and invert it onto the fixture. Push the new spherical tile 3 onto the sliding sleeve 201 and fit it together. Use the fixture to connect the new spherical tile 3 and the old spherical tile 3 with the combined sliding sleeve 201 to form a whole and rotate together with the shaft 1. Disassemble the second limit self-aligning component, rotate the shaft 1, and drive the new spherical tile 3 to rotate completely to the working area 402 of the bearing seat 4. The shaft 1 stops rotating. Install the second limit self-aligning component.

[0058] Steps for disassembling the old spherical tile 3: When the new spherical tile 3 rotates to the working area 402, the old spherical tile 3 rotates to the disassembly and assembly area 401. The tool is installed on the sliding sleeve 201 of the bushing 2 in the disassembly and assembly area 401 to pull out the old spherical tile 3 and lift it away.

[0059] Recovery steps: Remove the tooling, install the side retaining ring 202, and install the first limit self-aligning component.

[0060] This article uses specific embodiments to illustrate the principles and implementation methods of the present invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0061] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0062] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 based on the specific circumstances.

Claims

1. A self-aligning sliding bearing with replaceable wear parts, comprising a combined bushing, a spherical bearing shell, and a bearing housing, characterized in that, The bearing housing includes a disassembly / reassembly area and a working area in the circumferential direction. The working area and the outer surface of the spherical bearing pad are mutually mating spherical structures. The spherical bearing pad is assembled in the working area within the bearing housing to form a rolling friction pair. The spherical bearing pad can rotate to the disassembly / reassembly area, and when the disassembly / reassembly area mates with the spherical bearing pad, a clearance is formed for disassembly / reassembly operations. The bushing includes a sliding sleeve and a side retaining ring that can be detached from one side of the sliding sleeve. The outer surface of the sliding sleeve and the inner surface of the spherical bearing pad are mutually mating cylindrical surfaces. The sliding sleeve is fitted inside the spherical bearing pad to form a sliding friction pair. The side retaining ring is assembled outside the spherical bearing pad and restricts the axial displacement of the spherical bearing pad. The spherical tile has adjustment grooves at both ends, and the working area has a first limiting self-aligning component and a second limiting self-aligning component at both ends. The first limiting self-aligning component and the second limiting self-aligning component are respectively matched with the corresponding adjustment grooves. The first limiting self-aligning component and the second limiting self-aligning component can cooperate with each other to restrict the spherical tile from sliding circumferentially, and can also allow the spherical tile to rotate and align relative to the bearing seat. The wrap angle of the spherical tile is 160-180 degrees. The line connecting the first limiting self-aligning component and the second limiting self-aligning component forms an angle of 30-60 degrees with the horizontal line. The first limiting self-aligning component is mounted above the second limiting self-aligning component.

2. The self-aligning sliding bearing with replaceable wear parts as described in claim 1, characterized in that, The first limiting and self-aligning assembly includes a first limiting block detachably connected to the bearing housing and a first arc-shaped self-aligning block that matches the end of the spherical tile. One side of the arc-shaped self-aligning block is in line contact with the first limiting block, and the other side abuts against the spherical tile. The first limiting and self-aligning assembly also includes a second limiting block detachably connected to the bearing housing and a second arc-shaped self-aligning block that matches the end of the spherical tile. One side of the arc-shaped self-aligning block is in line contact with the second limiting block, and the other side abuts against the spherical tile.

3. The self-aligning sliding bearing with replaceable wear parts as described in claim 1, characterized in that, A bearing condition monitoring device is embedded in the bearing area of ​​the spherical tile, and the bearing condition monitoring device is connected to the control system signal.

4. The self-aligning sliding bearing with replaceable wear parts as described in claim 3, characterized in that, The bearing condition monitoring device includes an oil film temperature sensor, a wear measurement sensor, and a life prediction sensor. Multiple sets of bearing condition monitoring devices are evenly distributed in the bearing area of ​​the spherical tile.

5. The self-aligning sliding bearing with replaceable wear parts as described in claim 1, characterized in that, The spherical tile includes a spherical tile base and multiple assembled tiles, which are detachably connected to the spherical tile base and cover the inner surface of the spherical tile base.

6. The self-aligning sliding bearing with replaceable wear parts as described in claim 5, characterized in that, The mounting bearing is a flexible metal-plastic bearing.

7. A method for online replacement of a self-aligning sliding bearing, using a self-aligning sliding bearing with replaceable wear parts as described in any one of claims 1-6, characterized in that, Includes the following steps: Installation steps: Remove the first limit self-aligning component, remove the side retaining ring, and install the tool on the sliding sleeve of the bushing in the disassembly and assembly area, so that the outer circle of the tool is horizontally aligned with the outer circle of the sliding sleeve. Steps for installing a new spherical bearing: Lift the new spherical bearing and invert it onto the fixture. Push the new spherical bearing onto the sliding sleeve and fit it together. Use the fixture to connect the new spherical bearing and the old spherical bearing to the combined sliding sleeve as a whole and rotate it together with the shaft. Remove the second limit self-aligning component, rotate the shaft, and drive the new spherical bearing to rotate completely to the working area of ​​the bearing seat. Stop the shaft from rotating and install the second limit self-aligning component. Steps for disassembling old spherical tiles: When the new spherical tile rotates to the working area, the old spherical tile rotates to the disassembly and assembly area. Install the tooling onto the sliding sleeve of the bushing in the disassembly and assembly area, pull out the old spherical tile, and lift it away. Recovery steps: Remove the tooling, install the side retaining ring, and install the first limit self-aligning component.

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