CN105460542B - Integral support low stress belt conveyor's pulley - Google Patents

Abstract

The invention discloses an integrally supported low-stress belt conveyor roller, comprising a roller shaft, an expansion sleeve device, a cylinder body, a spoke plate and a hub; the hub is mounted on the roller shaft through an expansion sleeve device, and the The cylinder body is installed on the wheel hub through the spoke plate, and the cylinder body and the drum shaft are coaxial; a support ring device is also included, and the support ring device includes a support outer ring, a support column and a support inner ring, and the support outer ring is connected to the support inner ring through the support column The support inner ring of the support ring device is installed on the drum shaft, and the support outer ring cooperates with the cylinder body; the spoke plate and the wheel hub are connected as a whole through reinforcing ribs. The cylinder of the invention has high strength and rigidity, so the stress and deformation of the cylinder are small, prolonging the service life of the invention and improving the reliability of the belt conveyor; meanwhile, the invention has simple and ingenious structure, convenient installation and low manufacturing cost , can be widely popularized and applied in the field of belt conveyor technology.

Description

Integral Support Low Stress Belt Conveyor Rollers

technical field

The invention belongs to the technical field of belt conveyors, and in particular relates to an integrally supported low-stress belt conveyor roller.

Background technique

Belt conveyor is a friction-driven machine that transports bulk materials in a continuous manner. It is widely used in metallurgy, mining, chemical industry, coal, ports, power stations, building materials, ports, food and other industrial fields. As the main transmission part of the belt conveyor, the roller plays a pivotal role in the entire conveyor transmission system. The performance of the roller will directly affect the quality and performance of the whole conveyor. In the previous design, people often used empirical formula method and analogy method to design the drum, and adopted a high safety factor and increased size to ensure the safety and reliability of the structure, resulting in excessive structural size and weight of the drum. Large, complex structure, resulting in high manufacturing costs, and is not conducive to installation and maintenance. Traditional structural design often requires the manufacture of finished products, experiments to verify whether the structure is reasonable, continuous modification, long design cycle, cumbersome process, and high design cost. The traditional design only satisfies the strength requirements through calculation, without analyzing the stress distribution of the drum during actual work, and cannot clarify the location of the stress danger zone, and cannot design the drum structure in a targeted manner. In addition, the traditional side web device is often connected by welding the hub, web, and ribs, and the internal structure is damaged due to welding, and welding residual stress is generated at the same time. The existing ordinary drum structure designed based on experience is often prone to deformation of the drum skin, damage to the weld near the hub, and radial cracks in the radial plate during actual operation, resulting in premature failure of the drum structure and functions, causing various mechanical problems. Failure, greatly reducing the service life. Moreover, the failure of the rollers often leads to the shutdown of the belt conveyor production line for maintenance, causing the entire conveyor line to stop transportation and causing huge economic losses to the enterprise. In addition, if the roller fails to be replaced in time, it may cause catastrophic damage to personal safety and the entire equipment.

Contents of the invention

In order to solve the above technical problems, the present invention provides an integrally supported low-stress belt conveyor roller with long service life, which can improve the reliability of the belt conveyor and reduce the operation and maintenance costs of the belt conveyor.

The technical solution adopted in the present invention is: an integral support low-stress belt conveyor roller, including a roller shaft, an expansion sleeve device, a cylinder body, a spoke plate and a hub; the hub is installed on the roller shaft through an expansion sleeve device , the cylinder body is installed on the wheel hub through the spoke plate, and the cylinder body and the drum shaft are coaxial; it is characterized in that: it also includes a support ring device, the support ring device includes a support outer ring, a support column and a support inner ring, and the support outer ring The support column is connected with the support inner ring; the support inner ring of the support ring device is installed on the drum shaft, and the support outer ring cooperates with the cylinder body; the spoke plate and the wheel hub are connected as a whole through reinforcing ribs.

In the above-mentioned integrated supporting low-stress belt conveyor roller, the support ring device includes a plurality of support columns, the support columns are arranged along the radius of the support outer ring, and the plurality of support columns are evenly arranged along the circumferential direction; the support ring device The supporting inner ring is installed on the roller shaft through the expansion sleeve.

In the above-mentioned integrated supporting low-stress belt conveyor roller, the expansion sleeve includes screws, an outer ring of the expansion sleeve and an inner ring of the expansion sleeve. The inner hole of the outer ring of the expansion sleeve is a tapered hole, and the inner ring of the expansion sleeve is a tapered hole. Shape, the outer ring of the expansion sleeve matches the inner ring of the expansion sleeve and is connected by screws.

In the above-mentioned integrated support low-stress belt conveyor roller, the expansion sleeve device includes an expansion sleeve outer ring and two expansion sleeve inner rings, and the two ends of the expansion sleeve outer ring are respectively provided with annular grooves with wedge-shaped cross-sections; The inner ring of the sleeve is an annular structure with a wedge-shaped cross section; the inner rings of the two expansion sleeves are respectively embedded in the two annular grooves of the outer ring of the expansion sleeve and connected by screws.

In the above integrally supported low-stress belt conveyor roller, the outer wall of the cylinder body is bonded with primer, the outer side of the primer is bonded with surface glue, and the surface of the surface glue is provided with several grooves.

In the aforementioned integrally supported low-stress belt conveyor roller, the spoke plates, hubs and reinforcing ribs are forged into an integral structure.

Compared with the prior art, the present invention has the following beneficial effects:

The reinforcing rib of the present invention, the hub, and the web are arranged as an integral structure, which improves the strength of the cylinder and the web device, effectively reduces the stress and deformation of the cylinder and the side web of the present invention, and greatly improves The service life of the roller and the reliability of the whole belt conveyor reduce the operation and maintenance cost of the belt conveyor, and at the same time make the manufacturing process of the roller simpler and reduce the production cost. The spoke plate, hub and reinforcing rib are set as an integral structure, which is manufactured by forging process. The interior is a fiber structure, and its mechanical properties are better, which can effectively avoid the welding stress generated by welding the hub and the spoke plate in the past. The structure is more reasonable, which is conducive to mass production and improves production efficiency; by setting the support ring device between the cylinder body and the drum shaft, the stress and deformation of the cylinder body are effectively reduced. The design of the support ring device is reasonable and the manufacturing process is simple. The expansion sleeve can conveniently adjust the matching state of the support ring and the roller, which is convenient for installation and disassembly, low production cost, low labor intensity for workers, and is conducive to mass production.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic structural view of the expansion sleeve device of the present invention.

Fig. 3 is a structural schematic diagram of the supporting ring device of the present invention.

Fig. 4 is a structural schematic diagram of the expansion sleeve of the present invention.

Fig. 5 is a nephogram of the stress distribution of the barrel when the device of the present invention is not added with a support ring.

Fig. 6 is a nephogram of the total deformation of the barrel when the device of the present invention is not added with a support ring.

Fig. 7 is a nephogram of the stress distribution of the cylinder body when the present invention works.

Fig. 8 is a nephogram of the total deformation of the barrel when the present invention works.

Detailed ways

The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

The invention is a drum device designed on the basis of finite element analysis of the drum, combined with the stress distribution and deformation characteristics of the drum and the actual failure mode of the drum.

As shown in Figure 1, the present invention includes a roller shaft 1, an expansion sleeve device 2, a bottom rubber 3, a surface rubber 4, a spoke plate 5, a hub 6, a cylinder 7, a reinforcing rib 8, a support ring device 9, and an expansion sleeve 10 . The hub 6 and the roller shaft 1 are connected by an interference fit through the expansion sleeve device 2 . The left end of the drum shaft 1 has a keyway, which is connected with the driving part through a key to transmit torque; the drum shaft 1 is a stepped shaft structure, and the axial positioning of the expansion sleeve device 2 is realized through the shaft shoulder, so as to realize the alignment of the cylinder 7 axial positioning. The cylinder body 7 is installed on the hub 6 through the spoke plate 5, and the cylinder body 7 and the drum shaft 1 are coaxial. The reinforcing rib 8 is forged with the web plate 5 and the hub 6 to form an integral structure. The number of reinforcing ribs 8 is three, which are evenly arranged along the circumferential direction. The support ring device 9 is connected to the roller shaft 1 in an interference fit manner through the expansion action of the expansion sleeve 10 , and the support ring device 9 is connected to the cylinder body 7 in an interference fit manner. The primer 3 is arranged on the outer wall of the cylinder body 7 , and the surface glue 4 is arranged on the outer side of the primer 3 . The cylinder body 7 is bonded to the bottom glue 3, and the bottom glue 3 and the surface glue 4 are bonded by an adhesive. The surface of the surface glue 4 is provided with several grooves.

As shown in Figure 2, the expansion sleeve device 2 includes an expansion sleeve outer ring 11 and two expansion sleeve inner rings 12, the two ends of the expansion sleeve outer ring 11 are respectively provided with annular grooves with a wedge-shaped cross section; the expansion sleeve inner ring 12 It is an annular structure with a wedge-shaped cross section; two inner rings 12 of the expansion sleeve are respectively embedded in two annular grooves of the outer ring 11 of the expansion sleeve, and the two inner rings 12 of the expansion sleeve are connected by screws. By adjusting the screw, the degree of tension between the expansion sleeve device 2 and the roller shaft 1 and the hub 6 can be adjusted.

As shown in Figure 3, the support ring device 9 comprises a support outer ring 13, three support columns 14 and a support inner ring 15, the support outer ring 13 is connected with the support inner ring 15 by three support columns 14, and the support outer ring 13 and the support inner ring 15 are coaxial, and a plurality of support columns 14 are evenly arranged along the circumferential direction.

As shown in Figure 4, the expansion sleeve 10 includes a screw 16, an expansion sleeve outer ring 17 and an expansion sleeve inner ring 18, the inner hole of the expansion sleeve outer ring 17 is a tapered hole, the expansion sleeve inner ring 18 is tapered, and the expansion sleeve outer ring The inner hole of the ring 17 cooperates with the inner ring 18 of the expansion sleeve and is connected by screws 16 . The degree of tension between the expansion sleeve and the roller shaft 1 and the inner ring 15 of the support device, the outer ring 13 of the support device and the cylinder 7 is adjusted by adjusting the screw 16 .

During the design of the present invention, first, solid modeling is carried out to the roller device when the support ring device 9 is not added, and the finite element simulation analysis is carried out by simulating the actual load of the roller device, thereby obtaining the distribution of the actual stress and deformation of the cylinder body 7 of the present invention Features, as shown in Figures 5 and 6. From the stress distribution diagram in Figure 5, find out where there is a large stress in the cylinder 7, and find out the area with a large amount of deformation on the surface of the cylinder 7 from the total deformation diagram of the cylinder in Figure 6, where the deformation of the cylinder 7 is the largest The support ring device 9 is set in the region, and the rib 8 is set on the web 5 device, and the rib 8, the hub 6, and the web 5 are arranged as an integral structure to improve the strength of the present invention. Establish the solid model of the present invention, and then carry out the finite element analysis on the present invention again, thereby obtain the stress and deformation distribution and deformation situation on the cylinder body 7 of the present invention, as shown in Figures 7 and 8 . The stress and deformation of the cylinder 7 are significantly reduced. By comparing Figures 5 and 6 with Figures 7 and 8, it can be found that the stress and deformation of the cylinder 7 are significantly reduced, and the deformation is about 1 /4.

The present invention adopts a structural design method based on finite element analysis to accurately analyze the stress-strain nephogram of each position on the cylinder body 7, find out the stress-strain dangerous area (including position and size), and then carry out targeted reduction of the stress-strain local structure Optimized design to meet the requirements of structural strength design criteria, overcome the disadvantages of excessive structural volume and heavy weight caused by increasing the safety factor in traditional empirical design, and effectively avoid the blindness of drum structural design, greatly shortening the structure The design cycle reduces the design cost, reduces the mechanical failure rate caused by the structural stress failure of the drum, and provides a scientific basis for designing a drum with light weight, high strength, safety and reliability.

In the present invention, a support ring device 9 is provided between the cylinder body 7 and the drum shaft 1, and an expansion sleeve 10 is provided between the support ring device 9 and the drum shaft 1, and the tension sleeve 10 is adjusted by adjusting the screw 16 of the expansion sleeve 10 The degree of tension between the roller shaft 1, the expansion sleeve 10 and the support ring device 9, the support ring device 9 and the cylinder 7 is connected by an interference fit, and the support ring device 9 and the expansion ring are tightened after expansion. The sleeve 10 rotates together with the drum shaft 1 to support the cylinder body 7 and improve the strength and support rigidity of the cylinder body 7 .

In the present invention, reinforcing ribs 8 are arranged between the hub 6 and the web 5, and the ribs 8, the hub 6, and the web 5 are arranged as an integral structure, which is manufactured by a forging process, and then the integral web device and the cylinder body 7 are connected. connected by welding. The internal organization of the integral web device is a fibrous structure, the mechanical properties are better, and the manufacturing process is simpler, reducing the number of welding times and the welding stress on the web 5 and the hub 6 . The integral web device and the drum shaft 1 are connected by an interference fit through the expansion sleeve device 2, which is more convenient for installation and adjustment. After expansion, the expansion sleeve device 2 rotates together with the drum shaft 1 and the cylinder body 7.

In the present invention, a base glue 3 and a top glue 4 are arranged on the cylinder body 7, and the bottom glue 3, the cylinder body 7, and the top glue 4 are connected in an adhesive manner through an adhesive. Several grooves are arranged on the surface rubber 4, which can effectively increase the coefficient of friction between it and the belt, prevent the present invention from slipping between the cylinder body 7 and the belt during work, and can also timely discharge the rubber that falls on the drum. dust and rain.

Claims (5)

1. a kind of integral support low stress belt conveyor's pulley, including drum shaft, expanding sleeve device, cylinder, disc and wheel hub； The wheel hub is mounted on by expanding sleeve device on drum shaft, and the cylinder is mounted on by disc on wheel hub, cylinder and rolling Cylinder axis is coaxial；It is characterized in that：Support loop device is further included, support loop device is included in support outer shroud, support post and support Ring, support outer shroud are connect by support post with support inner ring；The support inner ring of loop device is supported to be mounted on drum shaft, support Outer shroud coordinates with cylinder；It is connected between the disc and wheel hub by reinforcing rib integral；

The support loop device includes multiple support posts, and support post arranges that multiple supports are vertical along the radius of support outer shroud Column is evenly distributed in the circumferential direction；The support inner ring of loop device is supported to be mounted on drum shaft by expansion sleeve；

Construction design method based on finite element analysis, the support loop device are arranged on the region of barrel distortion amount maximum.

2. integral support low stress belt conveyor's pulley according to claim 1, it is characterised in that：The swelling Set includes screw, expansion set outer shroud and expansion set inner ring, and the endoporus of expansion set outer shroud is taper hole, and expansion set inner ring is tapered, expansion set outer shroud and Expansion set inner ring coordinates, and is connected by screw.

3. integral support low stress belt conveyor's pulley according to claim 1, it is characterised in that：Expanding sleeve device packet Expansion set outer shroud and two expansion set inner ring are included, annular groove of the section for wedge shape is respectively equipped in the both ends of the surface of expansion set outer shroud；Expansion set Inner ring is the loop configuration that section is wedge shape；Two expansion set inner ring are inlaid in respectively in two annular grooves of expansion set outer shroud, are led to Cross screw connection.

4. the integral support low stress belt conveyor's pulley according to any claim in claim 1-3, special Sign is：Primer is bonded on the lateral wall of cylinder, face glue is bonded on the outside of primer, face glue surface is provided with several grooves.

5. the integral support low stress belt conveyor's pulley according to any claim in claim 1-3, special Sign is：Disc, wheel hub and the reinforcing rib is forged into overall structure.