Parameter design method and device for carrier roller bearing and medium

Abstract

The invention discloses a parameter design method and device for a carrier roller bearing and a medium. The method is applied to a conveyor and comprises the steps that conveyor parameters and carrier roller parameters are obtained; obtaining carrier roller bearing parameters from a preset carrier roller bearing standard database; according to the conveyor parameters, the carrier roller parameters and the carrier roller bearing parameters, the deflection angle of a carrier roller and the angle clearance of a carrier roller bearing are determined respectively; the proportionality coefficient of the deflection angle of the carrier roller and the angle clearance of the carrier roller bearing is determined, and whether the proportionality coefficient meets a preset proportion condition or not is determined; if yes, the carrier roller bearing parameters serve as the carrier roller bearing parameters; and if not, continuously acquiring the bearing parameter set from the preset carrier roller bearing standard database. According to the method, the carrier roller bearing can be selected according to the determined carrier roller bearing parameters, and the failure of the carrier roller under the specific working condition of large object impact is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of conveyor idler, in particular to a parameter design method, device and medium of idler bearing. BACKGROUND

[0002] At present, belt conveyors are widely used in the field of bulk material conveying such as coal mines, ports and power plants. As the core component of supporting the conveying belt, the bearing life of the idler directly affects the operation reliability and maintenance cost of the conveyor. The parameters of the idler bearing of the underground coal mine conveyor are selected and designed according to the maximum coal particle size in the existing standard, which basically meets the operation requirements under normal circumstances, but in the transportation of the crossheading conveyor, continuous large block materials falling or rolling impact the idler, and after multiple impacts, the idler will suddenly fail. Field observation shows that the internal seal and the state of the grease of most such failed idlers are good, and the root cause of the failure is the damage of the bearing itself. After in-depth research and analysis, it is confirmed that the instantaneous huge impact force generated by the continuous and multiple large block material falling will cause irreversible bending deformation of the idler shaft, which will cause abnormal stress concentration between the rolling elements and the raceway inside the bearing, accelerate the damage of the rolling elements, and finally cause the premature failure of the bearing and the damage of the transportation structure. The existing parameter design of the idler bearing lacks consideration of the bearing performance requirements under the specific working condition of large block material impact. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a parameter design method of idler bearing, which can select idler bearing according to the determined idler bearing parameters, and avoid the failure of the idler under the specific working condition of large block object impact.

[0004] The present application also proposes a device and a medium with the above-mentioned parameter design method of idler bearing.

[0005] The parameter design method of idler bearing according to the first aspect of the present application is applied to a conveyor, comprising:

[0006] Obtaining conveyor parameters and idler parameters;

[0007] Obtaining idler bearing parameters from a preset idler bearing standard database;

[0008] According to the conveyor parameters, the idler parameters and the idler bearing parameters, the deflection angle of the idler and the angular play of the idler bearing are determined respectively;

[0009] Determine the proportionality coefficient of the deflection angle of the idler and the angular play of the idler bearing, and determine whether the proportionality coefficient meets the preset proportion condition; if yes, the idler bearing parameters are taken as the parameters of the idler bearing; if not, continue to obtain the bearing parameter set from the preset idler bearing standard database.

[0010] According to an embodiment of the present invention, a parameter design method for idler roller bearings has at least the following beneficial effects: First, the deflection angle of the idler roller and the angular clearance of the idler roller bearing are calculated and determined. Then, by comparing and verifying the deflection angle of the idler roller and the angular clearance of the idler roller bearing, it is verified whether the angular clearance of the idler roller bearing matches the deflection angle of the idler roller under the impact of a large object, and whether the angular clearance of the idler roller bearing meets the performance requirements of the idler roller bearing itself. Therefore, the idler roller bearing can be selected according to the determined idler roller bearing parameters, avoiding the failure of the idler roller under the specific working condition of impact by a large object. It also eliminates the safety hazard of "selecting a small shaft diameter to save costs leading to bearing failure" and avoids the economic problem of "blindly increasing the shaft diameter causing material waste", truly achieving a balance between safety and cost.

[0011] According to some embodiments of the present invention, it further includes:

[0012] If the proportional coefficients corresponding to the idler bearing parameters in the idler bearing standard database do not meet the preset proportional conditions, then values ​​are taken separately within the preset value range corresponding to each bearing parameter in a preset step to obtain the idler bearing parameters, thereby determining whether the proportional coefficients corresponding to the idler bearing parameters meet the preset proportional conditions.

[0013] According to some embodiments of the present invention, determining the deflection angle of the idler roller based on the conveyor parameters, the idler roller parameters, and the idler roller bearing parameters includes:

[0014] Based on the preset stress, the cantilever length of the idler's support point, the length of the idler, the elastic modulus of the idler, and the moment of inertia of the idler bearing section, the deflection value of the idler is obtained, specifically:

[0015]

[0016] Where P is the stress, α is the cantilever length of the idler roller, L is the length of the idler roller, E is the elastic modulus of the idler roller, I is the moment of inertia of the section of the idler roller bearing, and W... max This represents the deflection value of the idler roller;

[0017] The deflection angle of the idler roller is obtained based on its deflection value.

[0018] According to some embodiments of the present invention, the method further includes: obtaining the moment of inertia of the idler bearing section based on the diameter of the idler bearing section, using the following calculation formula:

[0019]

[0020] Where I is the moment of inertia of the roller bearing section, and d is the diameter of the preset roller bearing section.

[0021] According to some embodiments of the present invention, obtaining the deflection angle of the idler roller based on the deflection value of the idler roller includes:

[0022]

[0023] Among them, W max Let θ be the deflection value of the idler roller, l be the length of the idler roller, and θ be the deflection angle of the idler roller.

[0024] According to some embodiments of the present invention, the formula for calculating the stress is as follows:

[0025]

[0026] Where m is the preset weight of the item, v t v0 is the speed of the conveyor, v0 is the velocity of the object after impact, t is the impact time, and P is the stress.

[0027] According to some embodiments of the present invention, determining the angular clearance of the idler bearing based on the conveyor parameters, the idler roller parameters, and the idler roller bearing parameters includes:

[0028]

[0029] Where α0 is the angular clearance of the idler roller bearing, G r D represents the radial clearance of the idler roller bearing. w f is the diameter of the steel balls in the idler roller bearing. i f is the ratio of the radius of curvature of the inner ring groove of the idler roller bearing to the diameter of the steel ball in the idler roller bearing. e D is the ratio of the radius of curvature of the outer ring groove of the idler roller bearing to the diameter of the steel ball in the idler roller bearing. pw This refers to the bearing pitch circle diameter of the idler roller bearing.

[0030] According to some embodiments of the present invention, determining the proportionality coefficient between the deflection angle of the idler roller and the angular clearance of the idler roller bearing, and determining whether the proportionality coefficient satisfies a preset proportionality condition includes:

[0031] Divide the deflection angle of the idler roller by the angular clearance of the idler roller bearing to obtain the proportional coefficient between the deflection angle of the idler roller and the angular clearance of the idler roller bearing;

[0032] If the proportionality coefficient is less than 1, it is determined that the proportionality coefficient meets the preset proportionality condition; otherwise, it does not meet the condition.

[0033] An electronic device according to a second aspect of the present invention includes:

[0034] Memory, used to store programs;

[0035] A processor for executing a program stored in the memory, wherein when the processor executes the program stored in the memory, the processor is configured to perform the method as described in any one of the first aspects.

[0036] According to a third aspect of the present invention, a storage medium stores computer-executable instructions for performing the method as described in any one of the first aspects.

[0037] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0038] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.

[0039] Figure 1 This is a flowchart of a parameter design method for an idler roller bearing provided in an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of a parameter design method for a roller bearing provided in another embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of the deflection angle and deflection value of the idler roller in a parameter design method for an idler roller bearing provided in another embodiment of the present invention;

[0042] Figure 4 This is a schematic diagram of the angular clearance, radial clearance, and bearing pitch circle diameter of an idler bearing in a parameter design method for an idler bearing provided in another embodiment of the present invention. Detailed Implementation

[0043] 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.

[0044] It should be understood that in the description of the embodiments of the present invention, "multiple" (or "amounts") means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first," "second," etc., are used in the description, they are only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0045] like Figure 1 As shown, this embodiment of the invention provides a parameter design method for idler roller bearings, applied to conveyors, including:

[0046] Step S100: Obtain conveyor parameters and idler roller parameters;

[0047] Step S200: Obtain the idler bearing parameters from the preset idler bearing standard database;

[0048] Step S300: Determine the deflection angle of the idler roller and the angular clearance of the idler roller bearing based on the conveyor parameters, idler roller parameters, and idler roller bearing parameters, respectively.

[0049] Step S400: Determine the ratio coefficient between the deflection angle of the idler roller and the angular clearance of the idler roller bearing, and determine whether the ratio coefficient meets the preset ratio condition; if yes, then use the idler roller bearing parameters as the idler roller bearing parameters; if not, then continue to obtain the bearing parameter set from the preset idler roller bearing standard database.

[0050] First, the deflection angle of the idler roller and the angular clearance of the idler roller bearing are calculated and determined. Then, by comparing and verifying the deflection angle of the idler roller and the angular clearance of the idler roller bearing, it is verified whether the angular clearance of the idler roller bearing matches the deflection angle of the idler roller under the impact of a large object, and whether the angular clearance of the idler roller bearing meets the performance requirements of the idler roller bearing itself. Therefore, idler roller bearings can be selected based on the determined idler roller bearing parameters, avoiding idler roller failure under specific working conditions caused by the impact of large objects. It also eliminates the safety hazard of "selecting a small shaft diameter to save costs, leading to bearing failure" and avoids the economic problem of "blindly increasing the shaft diameter, causing material waste," truly achieving a balance between safety and cost.

[0051] In one embodiment, the method further includes:

[0052] If the proportional coefficients corresponding to the idler bearing parameters in the idler bearing standard database do not meet the preset proportional conditions, then values ​​are taken separately within the preset value range corresponding to each bearing parameter in a preset step to obtain the idler bearing parameters, thereby determining whether the proportional coefficients corresponding to the idler bearing parameters meet the preset proportional conditions.

[0053] It is easy to understand that the idler bearing standard database includes the parameters of existing idler bearings. If the idler bearings in the idler bearing standard database do not meet the preset ratio conditions, it means that the existing idler bearings do not meet the requirements and will fail under the condition of large objects falling.

[0054] In one embodiment, the roller bearing parameters include: steel ball diameter, inner groove radius of curvature coefficient, outer groove radius of curvature coefficient, and radial clearance; the preset steps for steel ball diameter and radial clearance are 0.001 mm, and the preset steps for inner groove radius of curvature coefficient and outer groove radius of curvature coefficient are 0.001 mm.

[0055] Inner groove curvature radius coefficient = inner groove curvature radius / steel ball diameter;

[0056] The outer groove curvature radius coefficient = outer groove curvature radius / steel ball diameter.

[0057] like Figure 2 As shown, in one embodiment, in step S300, determining the deflection angle of the idler roller based on the conveyor parameters, idler roller parameters, and idler roller bearing parameters includes:

[0058] Based on the preset stress, the cantilever length of the idler's support point, the length of the idler, the elastic modulus of the idler, and the moment of inertia of the idler bearing section, the deflection value of the idler is obtained, specifically:

[0059]

[0060] Where p is the stress, a is the cantilever length of the idler's support point, L is the length of the idler, E is the elastic modulus of the idler, I is the moment of inertia of the idler bearing section, and W... max This represents the deflection value of the idler roller;

[0061] The deflection angle of the idler roller is obtained based on its deflection value.

[0062] It should be noted that, Figure 2 The scenario simulates a large object falling onto the fulcrum of the idler roller. The grooves are the part of the idler roller that contacts and transports the object, with a length of l. The two ends of the idler roller are fixed by idler roller bearings.

[0063] In one embodiment, the roller bearing parameters include: steel ball diameter, inner groove radius of curvature coefficient, outer groove radius of curvature coefficient, and radial clearance;

[0064] The method also includes: obtaining the moment of inertia of the idler bearing section based on the diameter of the idler bearing section, using the following calculation formula:

[0065]

[0066] Where I is the moment of inertia of the roller bearing section, and d is the diameter of the preset roller bearing section.

[0067] It should be noted that the diameter of the cross section of each idler roller bearing is fixed, and the cross section diameters of different idler roller bearings are the same.

[0068] like Figure 3 As shown, in one embodiment, obtaining the deflection angle of the idler roller based on its deflection value includes:

[0069]

[0070] Among them, W max Let l be the deflection value of the idler roller, l be the length of the idler roller, and θ be the deflection angle of the idler roller (i.e., ...). Figure 3 (the angle of deviation in the middle).

[0071] It is easy to understand that when a large object falls, the idler roller may undergo instantaneous deformation, and the angle produced by this deformation is the deflection angle of the idler roller.

[0072] In one embodiment, the stress is calculated using the following formula:

[0073]

[0074] Where m is the preset weight of the item, v t v0 is the speed of the conveyor, t is the impact time, and P is the stress.

[0075] In one embodiment, the stress is calculated using the following formula:

[0076] P = m max g

[0077] Where, m max Let g be the weight of the pre-set large piece of coal, g be the acceleration due to gravity, and P be the stress.

[0078] In one embodiment, m is the weight of the large piece of coal, which is taken as 150 kg; v t =4m / s, v0 is actually the instantaneous velocity of the object after impact, which is 0, t =0.05s.

[0079] In one embodiment, determining the angular clearance of the idler bearing based on the conveyor parameters, idler parameters, and idler bearing parameters includes:

[0080]

[0081] Where α0 is the angular clearance of the idler roller bearing, G r D represents the radial clearance of the idler roller bearing. w f is the diameter of the steel balls in the idler roller bearing. if is the ratio of the radius of curvature of the inner ring groove of the idler roller bearing to the diameter of the steel ball in the idler roller bearing. e D is the ratio of the radius of curvature of the outer ring groove of the idler roller bearing to the diameter of the steel ball in the idler roller bearing. pw G is the bearing pitch circle diameter of the idler roller bearing. a This refers to the axial clearance of the idler roller bearing.

[0082] like Figure 4 As shown, in one embodiment, Figure 4 This indicates that α0 and D pw G r In practical terms, steel balls are connected and fixed with connectors. The end of the steel ball that is not connected with a connector is the outer or inner ring of the roller bearing. Angular clearance refers to the tilt angle that the outer ring can tilt relative to the inner ring from the state of no tilt to the state of extreme tilt.

[0083] In one embodiment, determining the proportionality coefficient between the deflection angle of the idler roller and the angular clearance of the idler roller bearing, and determining whether the proportionality coefficient meets a preset proportionality condition, includes:

[0084] Divide the deflection angle of the idler roller by the angular clearance of the idler roller bearing to obtain the proportional coefficient between the deflection angle of the idler roller and the angular clearance of the idler roller bearing.

[0085] If the proportionality coefficient is less than 1, it is determined that the proportionality coefficient meets the preset proportionality condition; otherwise, it does not meet the condition.

[0086] This invention also provides an electronic device, which includes, but is not limited to:

[0087] Memory, used to store programs;

[0088] The processor is used to execute programs stored in memory. When the processor executes the programs stored in memory, it is used to execute the above-mentioned parameter design method for idler roller bearings.

[0089] The processor and memory can be connected via a bus or other means.

[0090] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs, such as the method described in the embodiments of the present invention. The processor implements the above method by running the non-transitory software program and instructions stored in the memory.

[0091] The memory may include a program storage area and a data storage area, wherein the program storage area may store the operating system and application programs required for at least one function; the data storage area may store data for executing the methods described above. Furthermore, the memory may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory may optionally include memory remotely located relative to the processor, which can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0092] The non-transitory software program and instructions required to implement the above terminal selection method are stored in memory and are executed by one or more processors.

[0093] This invention also provides a storage medium storing computer-executable instructions for performing the above-described methods.

[0094] In one embodiment, the storage medium stores computer-executable instructions that are executed by one or more control processors.

[0095] The embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0096] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically include computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0097] This document describes embodiments of the invention, including preferred embodiments known to the inventors for carrying out the invention. Variations of these embodiments will become apparent to those skilled in the art upon reading the foregoing description. The inventors encourage those skilled in the art to adopt such variations as appropriate, and the inventors intend to practice embodiments of the invention in ways other than those specifically described herein. Therefore, the scope of the invention includes all modifications and equivalents of the subject matter set forth in the appended claims, as permitted by applicable law. Furthermore, the scope of the invention covers any combination of the foregoing elements in all possible variations thereof, unless otherwise indicated herein or otherwise clearly contradicted by the context.

Claims

1. A parameter design method for idler roller bearings, applied to conveyors, characterized in that, include: Obtain conveyor parameters and idler roller parameters; Obtain the roller bearing parameters from the preset roller bearing standard database; Based on the conveyor parameters, the idler roller parameters, and the idler roller bearing parameters, determine the deflection angle of the idler roller and the angular clearance of the idler roller bearing, respectively. Determine the ratio coefficient between the deflection angle of the idler roller and the angular clearance of the idler roller bearing, and determine whether the ratio coefficient meets the preset ratio condition; if yes, then use the idler roller bearing parameters as the idler roller bearing parameters; if not, continue to obtain the bearing parameter set from the preset idler roller bearing standard database.

2. The parameter design method for an idler roller bearing according to claim 1, characterized in that, Also includes: If the proportional coefficients corresponding to the idler bearing parameters in the idler bearing standard database do not meet the preset proportional conditions, then values ​​are taken separately within the preset value range corresponding to each bearing parameter in a preset step to obtain the idler bearing parameters, thereby determining whether the proportional coefficients corresponding to the idler bearing parameters meet the preset proportional conditions.

3. The parameter design method for an idler roller bearing according to claim 1, characterized in that, Determining the deflection angle of the idler roller based on the conveyor parameters, the idler roller parameters, and the idler roller bearing parameters includes: Based on the preset stress, the cantilever length of the idler's support point, the length of the idler, the elastic modulus of the idler, and the moment of inertia of the idler bearing section, the deflection value of the idler is obtained, specifically: Where P is the stress, a is the cantilever length of the idler's support point, L is the length of the idler, E is the elastic modulus of the idler, I is the moment of inertia of the idler bearing section, and W... max This represents the deflection value of the idler roller; The deflection angle of the idler roller is obtained based on its deflection value.

4. The parameter design method for an idler roller bearing according to claim 3, characterized in that, Also includes: The moment of inertia of the idler roller bearing section is obtained from the diameter of the idler roller bearing section, and the calculation formula is as follows: Where I is the moment of inertia of the roller bearing section, and d is the diameter of the preset roller bearing section.

5. The parameter design method for an idler roller bearing according to claim 3, characterized in that, The process of obtaining the deflection angle of the idler roller based on its deflection value includes: Among them, W max Let θ be the deflection value of the idler roller, l be the length of the idler roller, and θ be the deflection angle of the idler roller.

6. The parameter design method for an idler roller bearing according to claim 3, characterized in that, The formula for calculating the stress is as follows: Where m is the preset weight of the item, v t v0 is the speed of the conveyor, v0 is the velocity of the item after impact, t is the impact time, and P is the stress.

7. The parameter design method for an idler roller bearing according to claim 1, characterized in that, The step of determining the angular clearance of the idler bearing based on the conveyor parameters, the idler roller parameters, and the idler roller bearing parameters includes: Where α0 is the angular clearance of the idler roller bearing, G r D represents the radial clearance of the idler roller bearing. w f is the diameter of the steel balls in the idler roller bearing. i f is the ratio of the radius of curvature of the inner ring groove of the idler roller bearing to the diameter of the steel ball in the idler roller bearing. e D is the ratio of the radius of curvature of the outer ring groove of the idler roller bearing to the diameter of the steel ball in the idler roller bearing. pw This refers to the bearing pitch circle diameter of the idler roller bearing.

8. The parameter design method for an idler roller bearing according to claim 1, characterized in that, The step of determining the proportionality coefficient between the deflection angle of the idler roller and the angular clearance of the idler roller bearing, and determining whether the proportionality coefficient meets the preset proportionality condition, includes: Divide the deflection angle of the idler roller by the angular clearance of the idler roller bearing to obtain the proportional coefficient between the deflection angle of the idler roller and the angular clearance of the idler roller bearing; If the proportionality coefficient is less than 1, it is determined that the proportionality coefficient meets the preset proportionality condition; otherwise, it does not meet the condition.

9. An electronic device, characterized in that, include: Memory, used to store programs; A processor for executing a program stored in the memory, wherein when the processor executes the program stored in the memory, the processor is configured to perform the method as described in any one of claims 1 to 8.

10. A storage medium, characterized in that, The device stores computer-executable instructions for performing the method as described in any one of claims 1 to 8.

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