A sealing structure for a pitch roller

Abstract

The present application relates to rubber processing equipment technical field, specifically to a kind of sealing structure suitable for distance roller;Including oil groove and the main roller shaft and auxiliary roller shaft movably arranged in the oil groove, the main roller shaft is passed through and the auxiliary roller shaft is passed through respectively in the main wear hole and the auxiliary wear hole of the oil groove are set up;The main wear hole is enlarged round hole, its hole diameter is greater than the outer diameter of the main roller shaft, so that annular gap is formed between the main roller shaft and the main wear hole, the main wear hole outside is also provided with main roller sealing plate;The auxiliary wear hole is non-integral round hole, to accommodate the displacement of the auxiliary roller shaft in distance adjustment process, the auxiliary roller shaft is provided with auxiliary roller sealing plate, and the auxiliary roller sealing plate is fixedly connected to the auxiliary roller shaft, and is further fixed by lateral tight silk fixed position;The sealing structure of the present application can adapt to the dynamic change of distance roller, while installation precision requirement is loose, more convenient to disassemble and maintain.

Description

Technical Field

[0001] This invention relates to the field of rubber processing equipment technology, and specifically to a sealing structure suitable for adjustable rollers. Background Technology

[0002] The open mill is a key piece of equipment in the rubber processing industry. The rubber compound is drawn into the gap between two counter-rotating rollers at different linear velocities under the action of friction. Through the gap between the rollers, it is subjected to strong shearing and compression, which raises the temperature and increases the plasticity of the rubber compound, thereby achieving the purpose of rubber mixing. During the operation of the open mill, the transmission parts of the rollers are usually lubricated by thin oil. The lubricating oil is stored in an oil tank, and the oil tank needs to be provided with through holes for the roller shaft to pass through, so as to ensure the normal operation of the roller shaft.

[0003] However, during the rubber refining process, there is a need to adjust the center distance between two rollers. The auxiliary roller needs to be adjusted relative to the main roller. During the adjustment process, the shape of the through hole of the auxiliary roller on the oil groove changes from a full circle to a non-full circle or ellipse. Traditional sealing methods are difficult to adapt to this dynamic change, which can easily lead to lubricating oil leakage. At the same time, this adjustment method results in multiple sealing positions at the through hole of the oil groove, which also places extremely high requirements on the installation accuracy. Therefore, there is an urgent need for a sealing structure suitable for the adjustment roller that can adapt to the dynamic changes of the adjustment roller, while having relaxed installation accuracy requirements and being easier to disassemble and maintain. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the background art and provide a sealing structure suitable for adjustable rollers, which can adapt to the dynamic changes of adjustable rollers, while having relaxed installation accuracy requirements and being easier to disassemble and maintain.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A sealing structure suitable for pitch-adjusting rollers is characterized by comprising an oil groove and a main roller shaft and a secondary roller shaft movably disposed within the oil groove. The oil groove has a main through-shaft hole for the main roller shaft to pass through and a secondary through-shaft hole for the secondary roller shaft to pass through. The main through-shaft hole is an enlarged circular hole with a diameter larger than the outer diameter of the main roller shaft, forming an annular gap between the main roller shaft and the main through-shaft hole. A main roller sealing plate is also disposed on the outer side of the main through-shaft hole. The secondary through-shaft hole is a non-circular hole to accommodate the displacement of the secondary roller shaft during pitch adjustment. A secondary roller sealing plate is sleeved on the secondary roller shaft and is fixedly connected to the secondary roller shaft, further tightened by side tensioning wires.

[0006] Preferably, the main roller sealing plate has a split structure, consisting of two semi-circular sealing plate halves spliced ​​together. The inner circumference of each sealing plate halves is provided with a main roller felt strip groove, and a sealing felt strip is embedded in the main roller felt strip groove. The main roller sealing plate is adjustablely installed on the side wall of the oil tank by fasteners, and its position can be finely adjusted radially or circumferentially after installation to compensate for the concentricity deviation between the main roller shaft and the main through-shaft hole.

[0007] Preferably, the auxiliary through-shaft hole is an oblong hole or a waist-shaped hole, and the auxiliary roller sealing plate is fixed to the auxiliary roller shaft by a heat-fitting process; the auxiliary roller sealing plate has an auxiliary roller felt strip groove on one end face facing the oil trough, and the coverage area of ​​the auxiliary roller felt strip groove is larger than the projection range of the auxiliary through-shaft hole at the maximum and minimum adjustment positions; a sealing felt strip is embedded in the auxiliary roller felt strip groove to form a dynamic seal between the auxiliary roller sealing plate and the side wall of the oil trough.

[0008] Preferably, the two sealing plate halves of the main roller sealing plate are spliced ​​together by bolts, and a plurality of adjustment holes are arrayed on the sealing plate halves along the circumferential direction. The sealing plate halves are adjustablely fixed to the oil groove by fastening bolts passing through the adjustment holes, so that the position of the sealing plate halves can be finely adjusted after installation.

[0009] Preferably, the main roller sealing plate has a main mounting hole at its center that mates with the main roller shaft, and a main roller sealing ring is also provided in the main mounting hole and is installed with an interference fit with the main roller shaft; the main roller felt groove is an annular groove with a rectangular or trapezoidal cross section, and the width of the sealing felt strip embedded inside is greater than the width of the groove inside the main roller felt groove to form an interference fit.

[0010] Preferably, the auxiliary roller sealing plate has a disc-shaped structure with a secondary mounting hole in the center for the auxiliary roller shaft to pass through. The secondary mounting hole is equipped with an auxiliary roller sealing ring that is interference-fitted with the auxiliary roller shaft.

[0011] Preferably, the end of the auxiliary mounting hole is provided with a fixing part that protrudes outward along the axial direction. The side wall of the fixing part is provided with a plurality of tightening holes evenly distributed along the circumference. The tightening holes are provided with fastening screws as side tightening screws, which are used to further fasten the auxiliary roller sealing plate to the auxiliary roller shaft.

[0012] Preferably, the auxiliary roller felt groove is an annular groove, including an outer ring groove and an inner ring groove. The outer ring groove and the inner ring groove are connected by a radial connecting groove. Sealing felt strips are embedded in both the outer ring groove and the inner ring groove. The density of the sealing felt strips in the inner ring groove is greater than that in the outer ring groove, so as to form a gradient sealing effect.

[0013] Preferably, the diameter of the main through-shaft hole is 5-10 mm larger than the outer diameter of the main roller shaft, and the adjustment distance between the minimum and maximum adjustment positions of the auxiliary through-shaft hole is 10-30 mm.

[0014] In summary, the beneficial effects of this invention are as follows: 1. The sealing structure for adjustable rollers described in this invention employs an enlarged main shaft hole in conjunction with a split adjustable main roller sealing plate. The enlarged main shaft hole reduces the accuracy requirements for concentricity during installation, making the installation of the main roller shaft more convenient. The split main roller sealing plate allows for radial and circumferential position adjustment after installation, thereby compensating for concentricity deviations during installation and ensuring sealing performance. Furthermore, the split structure facilitates disassembly and installation, which is beneficial for daily maintenance and repair of the equipment, solving the problems of high installation accuracy requirements and the inability to adjust the sealing plate in existing technologies. 2. The sealing structure for adjustable rollers described in this invention adopts a structure in which the auxiliary roller sealing plate moves synchronously with the auxiliary roller shaft. When the auxiliary roller shaft needs to be adjusted relative to the main roller shaft, the auxiliary roller sealing plate will adjust synchronously with the auxiliary roller shaft. The coverage area of ​​the auxiliary roller felt groove on the auxiliary roller sealing plate is much larger than the range of the auxiliary through-shaft hole, so that the auxiliary roller shaft can achieve full-stroke dynamic sealing regardless of the adjustment distance, thus solving the sealing failure problem caused by the dynamic change of the through-shaft hole shape in the prior art. 3. The sealing structure applicable to adjustable pitch rollers described in this invention adopts a combination sealing structure with different sealing methods for the main roller shaft and the auxiliary roller shaft, forming a complete sealing system for the adjustable pitch roller shaft. The main roller shaft adopts a static adjustable seal, while the auxiliary roller shaft adopts a dynamic follow-up seal. The two sealing methods are independent of each other and work together to achieve all-round sealing of the open mill oil trough, effectively preventing lubricating oil leakage from the oil trough. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the adjustable roller sealing structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the oil tank in the adjustable roller sealing structure of the present invention; Figure 3 This is a schematic diagram of the side structure of the oil tank of the adjustable roller sealing structure of the present invention; Figure 4 This is a schematic diagram of the installation structure of the main roller sealing plate of the present invention; Figure 5 This is a schematic diagram of the structure of the main roller sealing plate of the present invention. Figure 6 This is a schematic diagram of the installation structure of the auxiliary roller sealing plate of the present invention; Figure 7 This is a schematic diagram of the structure of the auxiliary roller sealing plate of the present invention.

[0016] The markings in the diagram are: 1. Oil groove; 11. Main through-shaft hole; 12. Secondary through-shaft hole; 14. Adjustment hole; 2. Main roller shaft; 3. Secondary roller shaft; 4. Main roller sealing plate; 41. Sealing plate half; 42. Main roller felt groove; 43. Main mounting hole; 44. Main roller sealing ring; 5. Secondary roller sealing plate; 51. Secondary roller felt groove; 52. Secondary mounting hole; 53. Secondary roller sealing ring; 54. Fixing part; 55. Tightening wire hole. Detailed Implementation

[0017] The following specific embodiments are merely illustrative of the present invention and are not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to these embodiments without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present invention.

[0018] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] Example

[0020] according to Figures 1 to 7 As shown, a sealing structure suitable for adjusting rollers includes an oil trough 1 and a main roller shaft 2 and a secondary roller shaft 3 movably disposed within the oil trough 1. The oil trough 1 is provided with a main through-shaft hole 11 for the main roller shaft 2 to pass through and a secondary through-shaft hole 12 for the secondary roller shaft 3 to pass through. The main through-shaft hole 11 is an enlarged circular hole with a diameter larger than the outer diameter of the main roller shaft 2, so that an annular gap is formed between the main roller shaft 2 and the main through-shaft hole 11. A main roller sealing plate 4 is also provided on the outside of the main through-shaft hole 11. The secondary through-shaft hole 12 is a non-circular hole to accommodate the displacement of the secondary roller shaft 3 during the adjustment process. A secondary roller sealing plate 5 is sleeved on the secondary roller shaft 3 and is fixedly connected to the secondary roller shaft 3 and further tightened and fixed by side tightening wires.

[0021] The main through-shaft hole 11 is an enlarged circular hole with a diameter larger than the outer diameter of the main roller shaft 2, forming an annular gap between them. This allows the main roller shaft 2 to be finely adjusted within the main through-shaft hole 11. The diameter of the main through-shaft hole 11 is 5-10 mm larger than the outer diameter of the main roller shaft 2. This size design means that the main roller shaft 2 does not need to be deliberately concentric with the main through-shaft hole 11 during installation, which greatly reduces the installation accuracy requirements.

[0022] according to Figures 2-5As shown, the main roller sealing plate 4 has a split structure, which is composed of two semi-circular sealing plate halves 41 spliced ​​together. The inner circumferential surface of the sealing plate halves 41 is provided with a main roller felt strip groove 42, and a sealing felt strip is embedded in the main roller felt strip groove 42. The main roller sealing plate 4 is adjustablely installed on the side wall of the oil tank 1 by fasteners, and its position can be finely adjusted radially or circumferentially after installation to compensate for the concentricity deviation between the main roller shaft 2 and the main through-shaft hole 11. The main roller sealing plate 4 is composed of two split semi-circular sealing plate halves 41 spliced ​​together. The inner circumferential surface of each sealing plate halves 41 is provided with an annular main roller felt strip groove 42, and a sealing felt strip is embedded inside. The sealing felt strip and the main roller felt strip groove 42 form an interference fit.

[0023] according to Figure 4 , Figure 5 As shown, the two sealing plate halves 41 of the main roller sealing plate 4 are spliced ​​together by bolts. Several adjustment holes 14 are arrayed along the circumferential direction on the sealing plate halves 41. The sealing plate halves 41 are adjustablely fixed to the oil groove 1 by fastening bolts passing through the adjustment holes 14, allowing for fine-tuning of the position of the sealing plate halves 41 after installation. The main roller sealing plate 4 has a main mounting hole 43 at its center that mates with the main roller shaft 2. A main roller sealing ring 44 is also installed in the main mounting hole 43, which is interference-fitted with the main roller shaft 2. The main roller felt groove 42 is an annular groove with a rectangular or trapezoidal cross-section. The width of the sealing felt embedded inside is greater than the width of the groove, forming an interference fit. The two sealing... The plate half 41 is spliced ​​by bolts, and a positioning pin is set at the splice to ensure splicing accuracy. The adjustment holes 14 in the circumferential array on the sealing plate half 41 are oblong holes. The split sealing plate half 41 is adjustablely fixed to the oil tank 1 by fastening bolts passing through the adjustment holes 14. Since the adjustment holes 14 are oblong holes, the main roller sealing plate 4 can be finely adjusted in the radial direction after installation to achieve concentricity adjustment. The main roller sealing plate 44 is provided in the main mounting hole 43 that mates with the main roller shaft 2 to achieve gap sealing between the main roller shaft 2 and the main roller sealing plate 4. A sealing gasket is also provided between the main roller sealing plate 4 and the mounting boss 13 to further increase the sealing performance with the oil tank 1.

[0024] according to Figure 3 , Figure 6As shown, the secondary through-shaft hole 12 is an oblong or waist-shaped hole, and the secondary roller sealing plate 5 is fixed to the secondary roller shaft 3 by a heat-fitting process; a secondary roller felt groove 51 is opened on the side end face of the secondary roller sealing plate 5 facing the oil tank 1, and the coverage area of ​​the secondary roller felt groove 51 is larger than the projection area of ​​the secondary through-shaft hole 12 at the maximum and minimum adjustment positions; a sealing felt strip is embedded in the secondary roller felt groove 51 to form a dynamic seal between the secondary roller sealing plate 5 and the side wall of the oil tank 1, and the adjustment distance between the minimum and maximum adjustment positions of the secondary through-shaft hole 12 is 10-30mm. The adjustable distance design of the auxiliary through-shaft hole 12 allows the distance between the auxiliary roller shaft 3 installed in the auxiliary through-shaft hole 12 and the main roller shaft 2 to be adjusted, thereby meeting the process requirements of the rubber compound for the open mixing process. The coverage area of ​​the auxiliary roller felt groove 51 on the auxiliary roller sealing plate 5 is greater than the projection range of the auxiliary through-shaft hole 12 at the maximum and minimum adjustment positions. This parameter ensures that no matter whether the auxiliary roller shaft 3 is at the maximum or minimum roller gap position, the auxiliary roller felt groove 51 can completely cover the gap area between the auxiliary through-shaft hole 12 and the auxiliary roller shaft 3, achieving full-stroke dynamic sealing.

[0025] according to Figure 6 , Figure 7 As shown, the auxiliary roller sealing plate 5 has a disc-shaped structure with a secondary mounting hole 52 at its center for the auxiliary roller shaft 3 to pass through. The secondary mounting hole 52 is equipped with an auxiliary roller sealing ring 53, which is interference-fitted with the auxiliary roller shaft 3. The end of the secondary mounting hole 52 is provided with a fixing part 54 that protrudes outward along the axial direction. Multiple tightening holes 55 are evenly distributed circumferentially on the side wall of the fixing part 54. The tightening holes 55 are provided with fastening screws as side tightening screws to further fasten the auxiliary roller sealing plate 5 to the auxiliary roller shaft 3. The auxiliary roller felt groove 51 is an annular groove, including an outer ring groove and an inner ring groove. The outer ring groove and the inner ring groove are connected by a radial connecting groove. Sealing felt strips are embedded in both the outer ring groove and the inner ring groove. The density of the sealing felt strips in the inner ring groove is greater than the density of the sealing felt strips in the outer ring groove. To achieve a gradient sealing effect, four tightening holes 55 are evenly distributed circumferentially on the side wall of the fixing part 54 of the auxiliary mounting hole 52 on the auxiliary roller sealing plate 5. Each tightening hole 55 is equipped with a fastening screw, which is locked into the side wall of the auxiliary roller shaft 3 to further tighten the auxiliary roller sealing plate 5 onto the auxiliary roller shaft 3, preventing the auxiliary roller sealing plate 5 from loosening due to vibration during equipment operation. A secondary roller felt strip groove 51 is opened on the side end face of the auxiliary roller sealing plate 5 facing the oil tank 1, including an outer ring groove and an inner ring groove. The outer ring groove and the inner ring groove are connected by a radial connecting groove to form a labyrinth-type sealing structure. Sealing felt strips are embedded in the grooves, and the density of the sealing felt strips in the inner and outer ring grooves is different to form a gradient sealing effect and further improve the sealing reliability.

[0026] During the installation of the main roller shaft 2, since the main through-shaft hole 11 is an enlarged circular hole, there is no need to deliberately ensure the concentricity of the main roller shaft 2 and the main through-shaft hole 11. The main roller shaft 2 can pass smoothly through the main through-shaft hole 11. After installation, the two split sealing plate halves 41 are spliced ​​on the mounting part of the main roller shaft 2 and fixed to the oil groove 1 by fastening bolts. At this time, by adjusting the position of the fastening bolts in the adjustment hole 14, the position of the sealing plate halves 41 can be radially fine-tuned to compensate for the concentricity deviation during the installation process and ensure the sealing effect. When it is necessary to replace the sealing felt strip of the main roller shaft 2, it is only necessary to loosen the fastening bolts on the split main roller sealing plate 4 to split the main roller sealing plate 4 into two sealing plate halves 41 without disassembling the main roller shaft 2 as a whole, which improves the convenience of equipment maintenance.

[0027] The auxiliary roller sealing plate 5 of the auxiliary roller shaft 3 is fixed on the shaft and moves synchronously with the auxiliary roller shaft 3. When the auxiliary roller shaft 3 is adjusted relative to the main roller shaft 2, the auxiliary roller shaft 3 drives the auxiliary roller sealing plate 5 to move synchronously. Since the coverage area of ​​the auxiliary roller felt groove 51 is much larger than the projection range of the auxiliary shaft hole 12 at the maximum and minimum adjustment positions, no matter what adjustment position the auxiliary roller shaft 3 is in, the sealing felt strip in the auxiliary roller felt groove 51 can always completely cover the gap area between the auxiliary shaft hole 12 and the auxiliary roller shaft 3, thereby effectively preventing lubricating oil from leaking from the auxiliary shaft hole 12. The sealing felt strip in the auxiliary roller felt groove 51 forms an elastic contact seal between the auxiliary roller sealing plate 5 and the oil groove 1, which can adapt to the relative sliding between the auxiliary roller sealing plate 5 and the oil groove 1 and always maintain good sealing performance.

Claims

1. A sealing structure suitable for adjustable pitch rollers, characterized in that, The system includes an oil trough (1) and a main roller shaft (2) and a secondary roller shaft (3) movably disposed within the oil trough (1). The oil trough (1) is provided with a main through-shaft hole (11) for the main roller shaft (2) to pass through and a secondary through-shaft hole (12) for the secondary roller shaft (3) to pass through. The main through-shaft hole (11) is an enlarged circular hole with a diameter larger than the outer diameter of the main roller shaft (2), so that an annular gap is formed between the main roller shaft (2) and the main through-shaft hole (11). A main roller sealing plate (4) is also provided on the outside of the main through-shaft hole (11). The secondary through-shaft hole (12) is a non-circular hole to accommodate the displacement of the secondary roller shaft (3) during the pitch adjustment process. A secondary roller sealing plate (5) is sleeved on the secondary roller shaft (3). The secondary roller sealing plate (5) is fixedly connected to the secondary roller shaft (3) and further tightened and fixed by side tensioning wires.

2. The sealing structure suitable for adjusting rollers according to claim 1, characterized in that, The main roller sealing plate (4) is a split structure, which is composed of two semi-circular sealing plate halves (41). The inner circumference of the sealing plate halves (41) is provided with a main roller felt groove (42), and a sealing felt strip is embedded in the main roller felt groove (42). The main roller sealing plate (4) is adjustablely installed on the side wall of the oil tank (1) by fasteners, and its position can be finely adjusted in the radial or circumferential direction after installation to compensate for the concentricity deviation between the main roller shaft (2) and the main through-shaft hole (11).

3. A sealing structure suitable for adjustable-pitch rollers according to claim 1, characterized in that, The auxiliary through-shaft hole (12) is an oblong hole or a waist-shaped hole. The auxiliary roller sealing plate (5) is fixed to the auxiliary roller shaft (3) by a heat fitting process. The auxiliary roller sealing plate (5) has an auxiliary roller felt strip groove (51) on one side end face facing the oil tank (1). The coverage area of ​​the auxiliary roller felt strip groove (51) is larger than the projection range of the auxiliary through-shaft hole (12) at the maximum and minimum adjustment positions. The auxiliary roller felt strip groove (51) is embedded with a sealing felt strip, which is used to form a dynamic seal between the auxiliary roller sealing plate (5) and the side wall of the oil tank (1).

4. A sealing structure suitable for adjusting rollers according to claim 2, characterized in that, The two sealing plate halves (41) of the main roller sealing plate (4) are spliced ​​together by bolts. Several adjustment holes (14) are arranged in an array along the circumferential direction on the sealing plate halves (41). The sealing plate halves (41) are adjustablely fixed to the oil groove (1) by fastening bolts passing through the adjustment holes (14), so that the sealing plate halves (41) can be finely adjusted in position after installation.

5. A sealing structure suitable for adjusting rollers according to claim 2, characterized in that, The main roller sealing plate (4) has a main mounting hole (43) at its center that mates with the main roller shaft (2). The main roller sealing ring (44) is also provided in the main mounting hole (43) and is installed with the main roller shaft (2) in an interference fit. The main roller felt groove (42) is an annular groove with a rectangular or trapezoidal cross section. The width of the sealing felt embedded inside is greater than the width of the groove inside the main roller felt groove (42) to form an interference fit.

6. A sealing structure suitable for adjusting rollers according to claim 3, characterized in that, The auxiliary roller sealing plate (5) has a disc-shaped structure with an auxiliary mounting hole (52) in the center for the auxiliary roller shaft (3) to pass through. The auxiliary mounting hole (52) is equipped with an auxiliary roller sealing ring (53) that is interference-fitted with the auxiliary roller shaft (3).

7. A sealing structure suitable for adjusting rollers according to claim 6, characterized in that, The end of the auxiliary mounting hole (52) is provided with a fixing part (54) that protrudes outward along the axial direction. Multiple tightening holes (55) are evenly distributed along the circumference on the side wall of the fixing part (54). The tightening holes (55) are provided with fastening screws as side tightening screws, which are used to further tighten the auxiliary roller sealing plate (5) onto the auxiliary roller shaft (3).

8. A sealing structure suitable for adjustable-pitch rollers according to claim 3, characterized in that, The auxiliary roller felt groove (51) is an annular groove, including an outer ring groove and an inner ring groove. The outer ring groove and the inner ring groove are connected by a radial connecting groove. Sealing felt strips are embedded in both the outer ring groove and the inner ring groove. The density of the sealing felt strips in the inner ring groove is greater than that in the outer ring groove, so as to form a gradient sealing effect.

9. A sealing structure suitable for adjusting rollers according to claim 1, characterized in that, The diameter of the main through-shaft hole (11) is 5-10 mm larger than the outer diameter of the main roller shaft (2), and the adjustment distance between the minimum and maximum adjustment positions of the auxiliary through-shaft hole (12) is 10-30 mm.

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