A welded elastic gear ring for large rotary kiln and its auxiliary installation tool

Abstract

The present invention relates to a welded elastic gear ring for a large rotary kiln and an auxiliary installation tool thereof. The welded elastic gear ring comprises a split gear ring, a butt joint assembly, an end face positioning assembly and a spring plate assembly; the split gear ring is elastically connected to the rotary kiln body through a plurality of spring plate assemblies; a butt joint assembly and an end face positioning assembly are arranged at the butt joint of the split gear ring; the auxiliary installation tool comprises a straightening device and a spring plate pressing device; in the present invention, the split gear ring is elastically connected to the kiln body through a spring plate, which significantly improves the strength and service life of the rotary kiln and shortens the installation and maintenance time; the end face positioning assembly is used to accurately position and multiple fix the split surface of the gear ring to prevent the occurrence of dislocation and loosening, thereby improving the service life of the gear ring and the safety of equipment operation; according to the structural characteristics of the rotary kiln, oil receiving devices with different structures are used at the high and low ends to fully recover the lubricating oil. It not only saves energy but also reduces environmental pollution.

Description

Technical Field

[0001] The invention relates to the technical field of rotary kilns, and in particular to a welded elastic gear ring for a large rotary kiln and an auxiliary installation tool thereof. Background Art

[0002] A rotary kiln refers to a rotating calcining kiln. It can be divided into cement kilns, metallurgical chemical kilns and lime kilns according to the materials it processes. The lime kiln is a large-scale metallurgical kiln equipment, mainly used to roast active lime or light-burned dolomite for steel and iron plants. As rotary kilns such as lime kilns develop towards scale and serialization, the transmission gear ring structure that matches them is also constantly developing and innovating.

[0003] The transmission gear ring of the rotary kiln is sleeved on the outer periphery of the kiln body. The pinion in the rotary kiln transmission device meshes with the transmission gear ring and drives it to rotate, thereby driving the rotary kiln body to rotate. A connecting device is provided between the transmission gear ring and the kiln body. In the past, the connecting device often adopted a fixed connecting device, such as fastening the transmission gear ring to the kiln body by riveting or bolting. This connection method requires opening multiple connecting holes on the connecting plate in the connecting device and the kiln body, which not only reduces the strength of the equipment, but also greatly reduces the ductility of the connecting plate and its ability to adapt to the thermal deformation of the rotary kiln. In addition, the processing stress generated by the processing holes on the contact surface of the two, as well as the torsion and extrusion stress generated when installing the fasteners, will inevitably cause the connection plate to deform or even crack after a long period of accumulation, and more seriously, it will cause the kiln body to deform.

[0004] In addition, there are the following problems when installing the transmission gear ring: First, in order to facilitate replacement, the gear ring generally adopts a split structure consisting of two half gear rings. During the production process of the rotary kiln, the two half gear rings will be relatively offset along the mating surface to produce dislocation, causing shear force on the fasteners used for connection at the mating point. If the fasteners break, the two half gear rings will be disengaged, which will not only affect production and pose safety hazards, but also reduce the service life of the gear ring. Second, the lubricating oil on the tooth surface will flow from the tooth surface to the two end surfaces. The existing oil receiving device does not completely recover the lubricating oil, causing the lubricating oil to flow to other parts of the equipment, which not only causes waste but also pollutes the environment. Summary of the invention

[0005] The present invention provides a welded elastic gear ring for a large rotary kiln and an auxiliary installation tool thereof. The split gear ring is elastically connected to the kiln body through a spring plate, which not only significantly improves the strength and service life of the rotary kiln, but also simplifies the installation process and shortens the installation and maintenance time; the split surface of the gear ring is accurately positioned and multiple fixed through the end face positioning component to prevent the occurrence of dislocation and loosening, thereby improving the service life of the gear ring and the safety of equipment operation; according to the structural characteristics of the rotary kiln, different structures of oil receiving devices are used at the high and low ends to fully recover the lubricating oil. It not only saves energy, but also reduces environmental pollution.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A welded elastic gear ring for a large rotary kiln comprises a split gear ring, a butt joint assembly, an end face positioning assembly and a spring plate assembly; the split gear ring is sleeved on the periphery of the rotary kiln body, and the two are elastically connected by a plurality of spring plate assemblies arranged along the circumferential direction; the split gear ring is composed of two semi-annular gear rings, including gear teeth and wheel spokes, and the gear teeth are helical teeth; a butt joint assembly and an end face positioning assembly are arranged at the joint of the split gear ring; the butt joint assembly is composed of a butt flange and a butt bolt, and the end face positioning assembly is composed of a positioning shaft sleeve and a connecting screw; a gap of 1 to 1.5 mm is reserved at the joint of the gear teeth, and the two semi-annular gear rings are arranged at the joint of the two semi-annular gear rings. The two ends near the matching position are respectively provided with docking flanges, and the two docking flanges at the same matching position are fixedly connected by docking screws and matching nuts, and semicircular grooves are respectively provided on the contact surfaces of the two matching docking flanges, and the two semicircular grooves are matched to form a positioning shaft hole, and a connecting screw is passed through the positioning shaft hole, and the two ends of the connecting screw are tightly matched with the positioning shaft hole through the positioning sleeve, and the outer end of the connecting screw is locked and fixed by the matching nut; the spring plate assembly consists of a spring plate, an earring and a pin shaft, the spring plate is arranged along the tangent direction of the rotary kiln body, one end of the spring plate is provided with an earring and is hinged with the wheel spoke through the pin shaft, and the other end of the spring plate is welded and fixed to the rotary kiln body.

[0008] The positioning sleeve is provided with a shoulder, and the inner end surface of the shoulder is pressed tightly against the two butt flange end surfaces on both sides.

[0009] The spring plate is a rectangular sheet structure, and its width direction is parallel to the axial direction of the rotary kiln body; one end of the spring plate fixed to the rotary kiln body is an arc section, and the rest is a straight section; the arc section fits the rotary kiln body and is welded on three sides; the width of the arc section is greater than that of the straight section; a rounded transition is used between the straight section and the arc section.

[0010] The connecting screw and the butt bolt are perpendicular to each other, the connecting screw is parallel to the axis of the rotary kiln body, and the butt bolt is horizontally arranged along the transverse direction of the rotary kiln body.

[0011] A welded elastic gear ring for a large rotary kiln also includes an oil receiving device; the oil receiving device includes a high-end oil receiving pan and a low-end oil receiving pan; the high-end oil receiving pan is arranged at the higher end of the split gear ring corresponding to the rotary kiln body, and the low-end oil receiving pan is arranged at the lower end of the split gear ring corresponding to the rotary kiln body; the high-end oil receiving pan is a ring body with an L-shaped cross section, and the low-end oil receiving pan is a ring body with an F-shaped load surface; annular grooves are respectively provided on the end faces of both sides of the split gear ring, a boss is provided on one side of the high-end oil receiving pan and is embedded in the corresponding annular groove, and a sealant is applied at the embedding position, and an oil retaining ring is formed on the vertical edge of the other side of the high-end oil receiving pan; a boss is provided on one side of the low-end oil receiving pan and is embedded in the corresponding annular groove, and a sealant is applied at the embedding position, and two vertical edges on the other side of the low-end oil receiving pan form two oil retaining rings; the high-end oil receiving pan and the split gear ring, and the low-end oil receiving pan and the split gear ring are also fixed by a plurality of fastening screws uniformly arranged along the circumferential direction.

[0012] An auxiliary installation tool for a welded elastic gear ring for a large rotary kiln comprises an alignment device; the alignment device is composed of an alignment bracket, radial adjustment bolts and axial adjustment bolts; the alignment bracket is composed of an upper left vertical plate, an upper right vertical plate, a horizontal plate, a lower left vertical plate and a lower right vertical plate; the lower left vertical plate and the lower right vertical plate are arranged oppositely at the bottom of the horizontal plate, and the upper left vertical plate and the upper right vertical plate are arranged oppositely at the top of the horizontal plate; the upper left vertical plate and the upper right vertical plate are respectively located on both sides of the wheel spokes of the split gear ring, and the upper left vertical plate and the upper right vertical plate are symmetrically provided with axial adjustment bolts; the bottom ends of the lower left vertical plate and the lower right vertical plate are respectively fixed to the kiln body of the rotary kiln, and the horizontal plate is provided with radial adjustment bolts just below the wheel spokes of the corresponding split gear ring.

[0013] An auxiliary installation tool for a welded elastic gear ring for a large rotary kiln also includes a spring plate clamping device; the spring plate clamping device consists of a left bracket, a right bracket and a clamping bolt; the left bracket and the right bracket are symmetrically arranged on both sides of the spring plate, and are both L-shaped brackets, the bottom end of the vertical side of the L-shaped bracket is fixed to the rotary kiln body, the horizontal side extends inward and a clamping bolt is arranged above the spring plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1) The gear ring and the kiln body are elastically connected through a spring plate, which not only significantly improves the strength and service life of the rotary kiln, but also simplifies and shortens the installation and maintenance time of the kiln body;

[0016] 2) The end face positioning assembly is used to accurately position and multiplex the split surface of the gear ring to prevent dislocation and loosening, thereby increasing the service life of the gear ring and the safety of equipment operation;

[0017] 3) According to the structural characteristics of the rotary kiln, different oil receiving devices are used at the high and low ends to fully recover the lubricating oil. This not only saves energy but also reduces environmental pollution;

[0018] 4) Special installation tools are used for the alignment device and spring plate clamping device, which facilitates alignment and temporary fixation during the installation of the gear ring, effectively improving the installation efficiency and ensuring the installation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the welded elastic gear ring for a large rotary kiln according to the present invention.

[0020] Figure 2 yes Figure 1 Side view of.

[0021] Figure 3 yes Figure 1 AA view in.

[0022] Figure 3a yes Figure 3 Enlarged view of part I in .

[0023] Figure 4 yes Figure 1 B view in the figure.

[0024] Figure 5 yes Figure 1 The CC view in .

[0025] Figure 6 yes Figure 1 DD view in .

[0026] Figure 7 1 is an expanded view of the spring plate of the present invention.

[0027] In the figure: 1-rotary kiln body 2-split gear ring 2.1-gear teeth 2.2-spokes 3-jointing assembly 3.1-jointing flange 3.2-jointing bolts 4-end face positioning assembly 4.1-positioning sleeve 4.2-connecting screw 5-spring plate assembly 5.1-spring plate 5.2-earring 5.3-pin 6-lower oil pool 7-oil receiving device 7.1-high-end oil receiving pan 7.2-low-end oil receiving pan 7.3-boss 7.4-sealant 7.5-fastening screw 8-gear ring outer cover 9-aligning device 9.1-radial adjustment bolt 9.2-axial adjustment bolt 10-spring plate clamping device 10.1-clamping bolt 11-geometric split surface 12-tooth split surface DETAILED DESCRIPTION

[0028] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0029] like Figure 1 , Figure 2As shown, the welded elastic gear ring for a large rotary kiln of the present invention comprises a split gear ring 2, a butt-joint assembly 3, an end face positioning assembly 4 and a spring plate assembly 5; the split gear ring 2 is sleeved on the periphery of the rotary kiln body 1, and the two are elastically connected by a plurality of spring plate assemblies 5 arranged along the circumferential direction; the split gear ring 2 is composed of two semi-annular gear rings, including gear teeth 2.1 and wheel spokes 2.2, and the gear teeth 2.1 are helical teeth; the butt-joint assembly 3 and the end face positioning assembly 4 are provided at the joint of the split gear ring 2; Figure 1-Figure 3 As shown, the butt joint assembly 3 is composed of a butt flange 3.1 and a butt bolt 3.2, and the end face positioning assembly 4 is composed of a positioning sleeve 4.1 and a connecting screw 4.2; a gap of 1 to 1.5 mm is reserved at the tooth matching position, and two semi-annular gear rings are respectively provided with butt flanges 3.1 at both ends near the matching position, and two butt flanges 3.1 at the same matching position are fixedly connected by butt screws 3.2 and matching nuts, and semicircular grooves are respectively provided on the contact surfaces of the two matching butt flanges 3.1, and the two semicircular grooves are matched to form A positioning shaft hole is provided, in which a connecting screw 4.2 is passed, and both ends of the connecting screw 4.2 are tightly matched with the positioning shaft hole through positioning sleeves 4.1, and the outer end of the connecting screw 4.2 is locked and fixed by a matching nut; the spring plate assembly 5 is composed of a spring plate 5.1, an earring 5.2 and a pin 5.3, the spring plate 5.1 is arranged along the tangent direction of the rotary kiln body 1, one end of the spring plate 5.1 is provided with an earring 5.2 which is hinged to the wheel spoke 2.2 through the pin 5.3, and the other end of the spring plate 5.1 is welded and fixed to the rotary kiln body 1.

[0030] The positioning sleeve 4.1 is provided with a shoulder, and the inner end surface of the shoulder is pressed tightly against the end surfaces of the two docking flanges 3.1 on both sides.

[0031] like Figure 7 As shown, the spring plate 5.1 is a rectangular sheet structure, and its width direction is parallel to the axial direction of the rotary kiln body 1; one end of the spring plate 5.1 fixed to the rotary kiln body 1 is an arc section, and the rest is a straight section; the arc section fits the rotary kiln body 1 and is welded on three sides; the width of the arc section is greater than that of the straight section; a rounded transition is used between the straight section and the arc section.

[0032] The connecting screw rod 4.2 and the docking bolt 3.2 are perpendicular to each other, the connecting screw rod 4.2 is parallel to the axis of the rotary kiln body 1, and the docking bolt 3.2 is horizontally arranged along the rotary kiln body 1.

[0033] A welded elastic gear ring for a large rotary kiln, further comprising an oil receiving device 7; Figure 3As shown, the oil receiving device 7 includes a high-end oil receiving pan 7.1 and a low-end oil receiving pan 7.2; the high-end oil receiving pan 7.1 is arranged at the higher end of the split gear ring 2 corresponding to the rotary kiln body 1, and the low-end oil receiving pan 7.2 is arranged at the lower end of the split gear ring 2 corresponding to the rotary kiln body 1; the high-end oil receiving pan 7.1 is a ring body with an L-shaped cross section, and the low-end oil receiving pan 7.2 is a ring body with an F-shaped load surface; annular grooves are respectively provided on the end faces of both sides of the split gear ring 2, a boss 7.3 is provided on one side of the high-end oil receiving pan 7.1 and is embedded in the corresponding annular groove, and a sealant 7.4 is applied at the embedding position, and the vertical edge on the other side of the high-end oil receiving pan 7.1 forms an oil retaining ring; as shown Figure 3a As shown, a boss 7.3 is provided on one side of the low-end oil receiving pan 7.2 and is embedded in the corresponding annular groove, and a sealant 7.4 is applied to the embedded position, and the two vertical edges on the other side of the low-end oil receiving pan 7.2 form two oil retaining rings; the high-end oil receiving pan 7.1 and the split gear ring 2, and the low-end oil receiving pan 7.2 and the split gear ring 2 are also fixed by a plurality of fastening screws 7.5 evenly arranged along the circumferential direction.

[0034] An auxiliary installation tool for a welded elastic gear ring for a large rotary kiln, comprising a straightening device 9; Figure 5 As shown, the alignment device 9 consists of an alignment bracket, a radial adjustment bolt 9.1 and an axial adjustment bolt 9.2; the alignment bracket consists of an upper left vertical plate, an upper right vertical plate, a horizontal plate, a lower left vertical plate and a lower right vertical plate; the lower left vertical plate and the lower right vertical plate are arranged oppositely at the bottom of the horizontal plate, and the upper left vertical plate and the upper right vertical plate are arranged oppositely at the top of the horizontal plate; the upper left vertical plate and the upper right vertical plate are respectively located on both sides of the wheel spoke 2.2 of the split gear ring 2, and the axial adjustment bolts 9.2 are symmetrically arranged on the upper left vertical plate and the upper right vertical plate; the bottom ends of the lower left vertical plate and the lower right vertical plate are respectively fixed to the rotary kiln body 1, and the horizontal plate is provided with radial adjustment bolts 9.1 just below the wheel spoke 2.2 of the corresponding split gear ring 2.

[0035] An auxiliary installation tool for a welded elastic gear ring for a large rotary kiln, further comprising a spring plate clamping device 10; Figure 6 As shown, the spring plate clamping device 10 is composed of a left bracket, a right bracket and a clamping bolt 10.1; the left bracket and the right bracket are symmetrically arranged on both sides of the spring plate 5.1, and both are L-shaped brackets, the bottom end of the vertical side of the L-shaped bracket is fixed to the rotary kiln body 1, and the horizontal side extends inward and a clamping bolt 10.1 is arranged above the spring plate 5.1.

[0036] The welded elastic gear ring for a large rotary kiln of the present invention is sleeved on the outside of the rotary kiln body 1 and is used to pull the rotary kiln body 1 to rotate.

[0037] The rotary kiln body 1 is a low-speed heavy-load device, so the gear teeth of the transmission gear ring are generally set as helical teeth. For the half gear with helical gear, because the tooth profile is inclined, the production of the split gear ring is not simply uniformly split along the geometric center line, but the gear teeth and spokes are split along their respective split surfaces, that is, the spoke part of the gear ring is split along the geometric center line (that is, evenly divided along the geometric split surface), and the gear teeth are split along the inclined tooth profile angle. The tooth profile split surface of the gear teeth is located at the root of the two adjacent gear teeth, and is evenly distributed and inclined along both sides of the geometric split surface. Therefore, the outer peripheral gear teeth of a single semi-annular gear ring will protrude from the geometric split surface.

[0038] The geometrical section plane is also the butt joint plane of the two semi-annular gear rings. In order to prevent interference, Figure 4 As shown, the present invention reserves a certain gap (generally t=1-1.5 mm) between the tooth profile division surfaces 12 of the two semi-annular gear rings. When the two semi-annular gear rings are connected along the geometric division surface 11, there is a gap of 1-1.5 mm between the connecting gear teeth located at the tooth profile division surface 12.

[0039] The split gear ring 2 is coaxial with the center line of the rotary kiln body 1 and drives the rotary kiln body 1 to rotate through the pulling force tangential to the circumference of the rotary kiln body 1.

[0040] The two semi-annular gear rings are butted together by a butting assembly 3 arranged at the butting position, and the end face positioning assembly 4 is used to position the gear end faces of the two semi-annular gear rings at the butting position.

[0041] The connecting screw 4.2 in the end face positioning assembly 4 passes through the joint surface of the docking flange 3.1 in the center. Correspondingly, the docking flange 3.1 has a through hole at the joint surface. Positioning sleeves 4.1 are arranged at both ends of the connecting screw 4.2. The shoulders of the positioning sleeves 4.1 press on the end faces of the docking flange 3.1 corresponding to the two semi-annular gear rings. The two ends of the connecting screw 4.2 are locked and fixed by nuts; the end face positioning assembly 4 can effectively prevent the two semi-annular gear rings from misaligning.

[0042] The spring plate assembly 5 is arranged in the annular space between the split gear ring 2 and the rotary kiln body 1, and is used for indirect and elastic connection between the split gear ring 2 and the rotary kiln body 1. Multiple spring plates 5.1 in the spring plate assembly 5 are evenly arranged around the outer side of the rotary kiln body 1 in the circumferential direction. When the split gear ring 2 rotates, tension is generated by each spring plate 5.1, and the rotary kiln body 1 is pulled together to rotate. The spring plate assembly 5 can offset the displacement of the rotary kiln body 1 caused by thermal deformation or deflection, ensure that the meshing of the gear ring and the gear is not affected, and realize the elastic connection between the split gear ring 2 and the rotary kiln body 1.

[0043] like Figure 7As shown, the spring plate 5.1 is preferably a rectangular structure, and its width direction is arranged parallel to the axis of the rotary kiln body 1, and one end along the length direction is in contact with the rotary kiln body 1 for a distance, and the contact section is an arc section; the other end of the spring plate 5.1 extends along the tangent direction of the rotary kiln body 1 on the inner side of the split gear ring 2, and the extended section is a straight section. The width of the arc section is greater than that of the straight section, and an arc transition is used at the variable cross-section to reduce stress concentration. The arc section is welded to the rotary kiln body on three sides (such as Figure 7 The outer end of the straight section is provided with an earring 5.2, which is hinged to the split gear ring 2 through a pin 5.3.

[0044] like Figure 1 As shown, a gear ring cover 8 is arranged outside the split gear ring 2, and a lower oil pool 6 is arranged on one side of the bottom. When the split gear ring 2 rotates along with the rotary kiln body 1, the lubricating oil is replenished through the lower oil pool 6; oil receiving devices 7 are arranged at both ends of the split gear ring 2 for collecting the lubricating oil flowing from the tooth surface to both ends, and play a guiding role in the rotation process so that the collected lubricating oil flows into the lower oil pool 6.

[0045] In the present invention, according to the structural characteristics of the rotary kiln body 1 being tilted, the oil receiving device 7 is provided with a high-end oil receiving pan 7.1 and a low-end oil receiving pan 7.2, which are respectively installed on the end faces of the high end and the low end of the split gear ring 2, and rotate with the split gear ring 2. The split gear ring 2 is tiltedly installed with the rotary kiln body 1, and the flow rate and flow rate of the lubricating oil at the high and low ends of the gear ring are different. The amount of lubricating oil flowing to the low end is large, and the impact is relatively large. Therefore, when designing the oil receiving pan, the capacity of the low-end oil receiving pan 7.2 is greater than the capacity of the high-end oil receiving pan 7.1, and a partition is provided inside the low-end oil receiving pan 7.2 for secondary oil blocking, fully recovering the splashed oil, and preventing the lubricating oil from flowing horizontally. The installation method of the high-end oil receiving pan 7.1 is the same as that of the low-end oil receiving pan 7.2, that is, a boss 7.3 is set on the end face of the oil receiving pan, inserted into the annular groove on the end face of the split gear ring 2, fixed by tightening screws 7.5, and then a sealant 7.4 is applied to the depression at the connection to seal the lubricating oil and prevent leakage.

[0046] The spring plate assembly 5 described in the present invention is aligned and temporarily fixed by a special auxiliary installation tool during installation. The auxiliary installation tool includes an alignment device 9 and a spring plate clamping device 10. The alignment device 9 is provided with radial adjustment bolts 9.1 and axial adjustment bolts 9.2, and the radial and axial positions of the split gear ring 2 are adjusted by adjusting the spokes 2.2. The alignment device 9 generally has multiple pieces evenly distributed along the circumferential direction. After the gear ring is aligned, the spring plate 5.1 is pressed against the outer surface of the rotary kiln body 1 by the spring plate clamping device 10 for temporary fixation before welding. After all installation indicators of the split gear ring 2 meet the debugging requirements, the arc section of the spring plate 5.1 is welded and fixed to the rotary kiln body 1. After the rotary kiln body 1 passes the inspection, the auxiliary installation tool is removed.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A welded elastic gear ring for a large rotary kiln, characterized in that: The invention comprises a split gear ring, a butt joint assembly, an end face positioning assembly and a spring plate assembly; the split gear ring is sleeved on the periphery of the rotary kiln body, and the two are elastically connected by a plurality of spring plate assemblies arranged along the circumferential direction; the split gear ring is composed of two semi-annular gear rings, including gear teeth and wheel spokes, and the gear teeth are helical teeth; a butt joint assembly and an end face positioning assembly are arranged at the joint of the split gear ring; the butt joint assembly is composed of a butt flange and a butt bolt, and the end face positioning assembly is composed of a positioning sleeve and a connecting screw; a gap of 1 to 1.5 mm is reserved at the joint of the gear teeth, and the 2 A semi-annular gear ring is provided with docking flanges at both ends near the mating position, and the two docking flanges at the same mating position are fixedly connected by docking screws and matching nuts, and semicircular grooves are respectively provided on the contact surfaces of the two matching docking flanges, and the two semicircular grooves are matched to form a positioning shaft hole, and a connecting screw is passed through the positioning shaft hole, and the two ends of the connecting screw are tightly matched with the positioning shaft hole through the positioning sleeve, and the outer end of the connecting screw is locked and fixed by the matching nut; the connecting screw and the docking bolt are perpendicular to each other, the connecting screw is parallel to the axis of the rotary kiln body, and the docking bolt is arranged along the horizontal direction of the rotary kiln body. The spring plate assembly is composed of a spring plate, an earring and a pin shaft. The spring plate is arranged tangentially to the kiln body of the rotary kiln. An earring is arranged at one end of the spring plate and is hinged to the wheel spoke through a pin shaft. The other end of the spring plate is welded and fixed to the kiln body of the rotary kiln. The welded elastic gear ring for large rotary kilns also includes an oil receiving device. The oil receiving device includes a high-end oil receiving pan and a low-end oil receiving pan. The high-end oil receiving pan is arranged at the higher end of the split gear ring corresponding to the kiln body of the rotary kiln, and the low-end oil receiving pan is arranged at the lower end of the split gear ring corresponding to the kiln body of the rotary kiln. The high-end oil receiving pan is a ring body with an L-shaped cross section, and the low-end oil receiving pan is The load-bearing surface is an F-shaped ring body; annular grooves are respectively provided on the end faces of both sides of the split gear ring, a side edge of the high-end oil receiving pan is provided with a boss which is embedded in the corresponding annular groove, and sealant is applied at the embedding position, and an oil retaining ring is formed on the vertical edge on the other side of the high-end oil receiving pan; a side edge of the low-end oil receiving pan is provided with a boss which is embedded in the corresponding annular groove, and sealant is applied at the embedding position, and two vertical edges on the other side of the low-end oil receiving pan form two oil retaining rings; the high-end oil receiving pan and the split gear ring, as well as the low-end oil receiving pan and the split gear ring are fixed by a plurality of fastening screws evenly arranged along the circumferential direction.

2. The welded elastic gear ring for a large rotary kiln according to claim 1, characterized in that: The positioning sleeve is provided with a shoulder, and the inner end surface of the shoulder is pressed tightly against the two butt flange end surfaces on both sides.

3. The welded elastic gear ring for a large rotary kiln according to claim 1, characterized in that: The spring plate is a rectangular sheet structure, and its width direction is parallel to the axial direction of the rotary kiln body; one end of the spring plate fixed to the rotary kiln body is an arc section, and the rest is a straight section; the arc section fits the rotary kiln body and is welded on three sides; the width of the arc section is greater than that of the straight section; a rounded transition is used between the straight section and the arc section.

4. An auxiliary installation tool for a welded elastic gear ring for a large rotary kiln as claimed in any one of claims 1 to 3, characterized in that: It comprises an alignment device; the alignment device consists of an alignment bracket, radial adjustment bolts and axial adjustment bolts; the alignment bracket consists of an upper left vertical plate, an upper right vertical plate, a horizontal plate, a lower left vertical plate and a lower right vertical plate; the lower left vertical plate and the lower right vertical plate are arranged oppositely at the bottom of the horizontal plate, and the upper left vertical plate and the upper right vertical plate are arranged oppositely at the top of the horizontal plate; the upper left vertical plate and the upper right vertical plate are respectively located at both sides of the wheel spokes of the split gear ring, and the upper left vertical plate and the upper right vertical plate are symmetrically provided with axial adjustment bolts; the bottom ends of the lower left vertical plate and the lower right vertical plate are respectively fixed to the kiln body of the rotary kiln, and the horizontal plate is provided with radial adjustment bolts just below the wheel spokes of the corresponding split gear ring.

5. The auxiliary installation tool for a welded elastic gear ring for a large rotary kiln according to claim 4, characterized in that: It also includes a spring plate clamping device; the spring plate clamping device consists of a left bracket, a right bracket and a clamping bolt; the left bracket and the right bracket are symmetrically arranged on both sides of the spring plate, and are both L-shaped brackets, the bottom end of the vertical side of the L-shaped bracket is fixed to the rotary kiln body, the horizontal side extends inward and a clamping bolt is arranged above the spring plate.

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