Pulping machine spline protection device
By installing a protective cover and sealing ring structure at the spline of the pulp refiner, the corrosion and wear problems of the pulp on the spline are solved, the service life of the spline is extended, and the operating cost of the pulp refiner is reduced.
Patent Information
- Application Number
- CN202520579521.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-03-31
AI Technical Summary
The pulping process causes severe corrosion and wear on the splines, resulting in a short service life for the splines and increasing the manufacturing cost of the pulping machine.
The structure employs a protective cover, including first, second, and third protective sleeves, which are respectively fitted onto the outer and inner sides of the spline. Combined with components such as sealing rings and bolts, it achieves double or multiple seals at the spline connection, preventing slurry from entering the spline connection.
It effectively prevents the spline teeth from being worn by the slurry, extends the service life of the spline, reduces the operating cost of the pulper, and reduces the reliance on corrosion-resistant stainless steel.
Smart Images
Figure CN223853060U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of pulping machine, specifically is a spline protection device of pulping machine. BACKGROUND
[0002] The pulping machine and the like are important equipment in the pulping system of a paper mill, and are used for grinding fiber raw materials such as waste paper, wood and bamboo into pulp to provide raw materials for subsequent papermaking processes.
[0003] At present, the spline is used to connect the output shaft and the grinding disc shaft of the pulping machine, so that the torque output by the motor is transmitted to the grinding disc through the spline, and the grinding disc is driven to rotate at a high speed to grind the materials. Since a large torque needs to be transmitted during the grinding process, the spline connection can provide reliable power transmission and ensure stable operation of the grinding disc. Therefore, the spline needs to work directly in the pulp, and in order to reduce the corrosion of the spline shaft by the pulp, the spline shaft is made of corrosion-resistant stainless steel, which increases the manufacturing cost of the pulping machine to some extent. In addition, when the sand content in the pulp is high, the pulp seriously wears the spline teeth of the outer spline, which reduces the service life of the spline to some extent. SUMMARY
[0004] The utility model aims at providing a spline protection device of pulping machine, solving the problem of serious wear of the spline by the pulp during the pulping process, improving the service life of the spline of the pulping machine, and reducing the cost required for normal operation of the pulping machine.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:
[0006] A spline protection device of pulping machine, comprising a protective cover sleeved outside the spline, wherein the spline comprises an inner spline arranged on the grinding disc shaft and an outer spline arranged on the output shaft, the inner spline is sleeved outside the outer spline, the protective cover comprises a first protective sleeve, a second protective sleeve and a third protective sleeve, the output shaft is provided with a shaft sleeve, the first protective sleeve is arranged outside the shaft sleeve, the second protective sleeve is arranged on one side of the inner spline and in sliding contact with the first protective sleeve, and the third protective sleeve is sleeved on the other side of the inner spline and wraps the end of the outer spline.
[0007] Further, the outer spline is provided with a gland plate in contact with the inner spline, and the gland plate is provided with a first bolt in threaded connection with the outer spline.
[0008] Further, a first sealing ring is arranged between the first protective sleeve and the shaft sleeve.
[0009] A second sealing ring is arranged between the second protective sleeve and one side of the inner spline.
[0010] Further, a third sealing ring is arranged between the third protective sleeve and the other side of the inner spline.
[0011] Further, a piston sealing ring is arranged on the second protective sleeve and in sliding contact with the first protective sleeve.
[0012] Further, a plurality of sliding blocks are connected to the millstone shaft in sliding manner, and a fixing rod is arranged, the first protective sleeve, the inner spline and the sliding blocks are respectively provided with first, second and third through holes for the fixing rod to pass through, one end of the fixing rod is provided with a groove, the sliding blocks are threadedly connected with a jackscrew which is inserted into the groove in a matching manner, the other end of the fixing rod is provided with a protrusion which is in contact with the third protective sleeve, and the sliding blocks and the millstone shaft are provided with first springs.
[0013] Further, a fourth through hole is arranged on the second protective sleeve, and a second bolt is arranged, the second bolt is threadedly connected with the inner spline after passing through the fourth through hole, and a nut is threadedly connected with the second bolt, and the nut and the second protective sleeve are provided with a second spring.
[0014] Compared with the prior art, the present application has the following advantages:
[0015] 1. The shaft sleeve is first installed on the output shaft, then the first protective sleeve is sleeved on the outer side of the output shaft until the first protective sleeve is in contact with the end surface of the shaft sleeve, the second protective sleeve is sleeved on one side of the inner spline, and lubricating grease is applied on the surface of the outer spline; the inner spline connected with the millstone shaft is sleeved on the outer spline, and the inner spline is pushed to the inner side so that the second protective sleeve is in contact with the first protective sleeve, thereby realizing the sealing of one side of the connection between the inner spline and the outer spline, preventing the pulp from entering the connection between the outer spline and the inner spline, avoiding the wear of the spline teeth of the outer spline by the pulp, thereby prolonging the service life of the spline of the pulp mill and reducing the cost required for the normal operation of the pulp mill.
[0016] 2. The third protective sleeve is sleeved on the outer side of the end surface of the outer spline and connected with the other side of the inner spline, thereby realizing the sealing of the other side of the connection between the inner spline and the outer spline, preventing the pulp from entering the connection between the outer spline and the inner spline, avoiding the wear of the spline teeth of the outer spline by the pulp, thereby prolonging the service life of the spline of the pulp mill and reducing the cost required for the normal operation of the pulp mill.
[0017] 3. The protected outer spline does not need to be made of expensive corrosion-resistant stainless steel, thereby further reducing the cost required for the normal operation of the pulp mill. BRIEF DESCRIPTION OF DRAWINGS
[0018] ATTACHMENT Figure 1 is a structural schematic view of the cooperation between the inner spline and the outer spline of the present application.
[0019] ATTACHMENT Figure 2This is an appendix to the utility model Figure 1 A magnified view of part A in the middle.
[0020] The labels shown in the attached diagram:
[0021] 1. Grinding disc shaft; 2. Internal spline; 3. Output shaft; 4. External spline; 5. First protective sleeve; 6. Second protective sleeve; 7. Third protective sleeve; 8. Shaft sleeve; 9. Pressure plate; 10. First bolt; 11. First sealing ring; 12. Second sealing ring; 13. Third sealing ring; 14. Piston sealing ring; 15. Slider; 16. Fixing rod; 17. First through hole; 18. Second through hole; 19. Third through hole; 20. Groove; 21. Set screw; 22. Protrusion; 23. First spring; 24. Fourth through hole; 25. Second bolt; 26. Nut; 27. Second spring. Detailed Implementation
[0022] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.
[0023] This utility model provides a spline protection device for a pulper, such as... Figure 1 As shown, the system includes a protective cover fitted over the outside of the spline. The spline comprises an inner spline 2 mounted on the grinding disc shaft 1 and an outer spline 4 mounted on the output shaft 3. The inner spline 2 is fitted over the outer spline 4. The protective cover includes a first protective sleeve 5, a second protective sleeve 6, and a third protective sleeve 7. The output shaft 3 is provided with a bushing 8. The first protective sleeve 5 is located outside the bushing 8. The second protective sleeve 6 is located on one side of the inner spline 2 and slides in contact with the first protective sleeve 5. The third protective sleeve 7 is fitted over the other side of the inner spline 2 and wraps around the end of the outer spline 4. This achieves sealing on both sides of the connection between the inner spline 2 and the outer spline 4, preventing slurry from entering the connection between the outer spline 4 and the inner spline 2, avoiding slurry wear on the key teeth of the outer spline 4, thereby improving the service life of the refiner spline and reducing the cost required for normal operation of the refiner. In addition, the protected outer spline 4 does not need to be made of expensive corrosion-resistant stainless steel, further reducing the cost required for normal operation of the refiner.
[0024] Preferred, such as Figure 1As shown, the outer spline 4 is provided with a gland plate 9 in contact with the inner spline 2, the gland plate 9 is provided with a first bolt 10 threaded with the outer spline 4, after placing the gland plate 9 at the end of the outer spline 4, by rotating the first bolt 10 on the gland plate 9, the first bolt 10 enters the outer spline 4, the gland plate 9 is fixed on the outer spline 4, at the same time the gland plate 9 is in contact with the inner spline 2, realizing the double sealing of the other side of the connection between the inner spline 2 and the outer spline 4, further preventing the pulp from entering the connection between the outer spline 4 and the inner spline 2, avoiding the pulp from wearing the spline teeth of the outer spline 4, thereby improving the service life of the spline of the refiner and reducing the cost required for the normal operation of the refiner.
[0025] Preferably, as shown in the drawings, Figure 1 As shown, the first protective sleeve 5 and the shaft sleeve 8 are provided with a first sealing ring 11, preventing the pulp from entering the spline through the gap between the first protective sleeve 5 and the shaft sleeve 8, avoiding the pulp from wearing the spline teeth of the outer spline 4, thereby improving the service life of the spline of the refiner and reducing the cost required for the normal operation of the refiner.
[0026] Preferably, as shown in the drawings, Figure 1 As shown, the second protective sleeve 6 and one side of the inner spline 2 are provided with a second sealing ring 12, preventing the pulp from entering the spline through the gap between the second protective sleeve 6 and the inner spline 2, avoiding the pulp from wearing the spline teeth of the outer spline 4, thereby improving the service life of the spline of the refiner and reducing the cost required for the normal operation of the refiner.
[0027] Preferably, as shown in the drawings, Figure 1 As shown, the third protective sleeve 7 and the other side of the inner spline 2 are provided with a third sealing ring 13, preventing the pulp from entering the spline through the gap between the third protective sleeve 7 and the inner spline 2, avoiding the pulp from wearing the spline teeth of the outer spline 4, thereby improving the service life of the spline of the refiner and reducing the cost required for the normal operation of the refiner.
[0028] Preferably, as shown in the drawings, Figure 1 As shown, the second protective sleeve 6 is provided with a piston sealing ring 14 in sliding contact with the first protective sleeve 5, so that the second protective sleeve 6 and the first protective sleeve 5 can rotate slightly, while ensuring the sealing between the first protective sleeve 5 and the second protective sleeve 6, avoiding the pulp from wearing the spline teeth of the outer spline 4, thereby improving the service life of the spline of the refiner and reducing the cost required for the normal operation of the refiner.
[0029] Preferably, as shown in the drawings, Figure 1 and Figure 2As shown, the grinding disc shaft 1 is slidably connected with several sliders 15, and also includes a fixing rod 16. The third protective sleeve 7, the inner spline 2, and the sliders 15 are respectively provided with a first through hole 17, a second through hole 18, and a third through hole 19 for the fixing rod 16 to pass through. One end of the fixing rod 16 is provided with a groove 20. The slider 15 is threaded with a set screw 21 that engages with the groove 20. The other end of the fixing rod 16 is provided with a protrusion 22 that contacts the third protective sleeve 7. The sliders 15... A first spring 23 is provided between the grinding wheel shaft 1 and the grinding wheel shaft 5. After the fixing rod 16 passes through the third protective sleeve 7, the inner spline 2, and the first through hole 17, the second through hole 18, and the third through hole 19 provided on the slider 15 in sequence, the slider 15 on the grinding wheel shaft 1 is pushed inward so that the set screw 21 provided on it corresponds to the groove 20 provided on the fixing rod 16. At the same time, the first spring 23 provided between the slider 15 and the grinding wheel shaft 1 is compressed. Then, the set screw 21 on the slider 15 is rotated so that its end enters the groove 20. Inside, the resistance generated by the contact between the set screw 21 and the groove 20 causes the slider 15 to move together with the fixed rod 16. Then, the force applied to the slider 15 is removed, and the rebound force generated by the compression of the first spring 23 will move outward through the slider 15, thereby driving the fixed rod 16 to move together with the slider 15 until the protrusion 22 on the other side of the fixed rod 16 contacts the third protective sleeve 7, thereby fixing the inner spline 2 and the third protective sleeve 7 on the grinding disc shaft 1. In addition, at this time, the first spring 23 is still in a compressed state, and the spring force it generates will be transmitted to the protrusion 22 through the slider 15 and the fixed rod 16, so that it acts on the third protective sleeve 7 and further squeezes the third sealing ring 13 between the third protective sleeve 7 and the inner spline 2, further preventing the slurry from entering the spline through the gap between the third protective sleeve 7 and the inner spline 2, avoiding the slurry from wearing the key teeth of the outer spline 4, thereby improving the service life of the grinding mill spline and reducing the cost required for normal operation of the grinding mill.
[0030] Preferred, such as Figure 1 and Figure 2As shown, the second protective sleeve 6 is provided with a fourth through hole 24, and further comprises a second bolt 25, the second bolt 25 is screwed with the inner spline 2 after passing through the fourth through hole 24, the second bolt 25 is screwed with a nut 26, the nut 26 and the second protective sleeve 6 are provided with a second spring 27, the second bolt 25 is screwed with the inner spline 2 after passing through the fourth through hole, then the second spring 27 is sleeved on the outer side of the second bolt 25, and the nut 26 is placed on the end of the second bolt 25, then the nut 26 is rotated on the second bolt 25, so that it moves on the second bolt 25 and compresses the second spring 27 between the nut 26 and the second protective sleeve 6, at the same time, the second spring 27 generates a rebound force on the second protective sleeve 6 after compression, further extruding the second sealing ring 12 provided between the second protective sleeve 6 and the inner spline 2, further preventing the slurry from entering the spline through the gap between the third protective sleeve 7 and the inner spline 2, avoiding the slurry from wearing the spline teeth of the outer spline 4, thereby improving the service life of the spline of the grinding machine and reducing the cost required for the normal operation of the grinding machine.
[0031] Embodiment 1
[0032] The utility model provides a kind of spline protection device of grinding machine, such as Figure 1 As shown, first install shaft sleeve 8 on output shaft 3, then the first protective sleeve 5 is sleeved on the outer side of output shaft 3 until it is in contact with the end surface of shaft sleeve 8, and the shoulder is fixed by screw First protective sleeve 5, the second protective sleeve 6 is sleeved on one side of inner spline 2, and lubricating grease is smeared on the surface of outer spline 4;The inner spline 2 connected with grinding disc shaft 1 is sleeved on outer spline 4, and the inner spline 2 is pushed to the inside, so that the second protective sleeve 6 is in contact with the first protective sleeve 5, to realize the sealing of one side of the connection between inner spline 2 and outer spline 4, prevent slurry from entering the connection between outer spline 4 and inner spline 2, avoid slurry from wearing the spline teeth of outer spline 4, thereby improve the service life of the spline of the grinding machine, reduce the cost of maintaining the normal operation of the grinding machine;
[0033] Finally, the third protective sleeve 7 is sleeved on the outer side of the end surface of outer spline 4, and is connected with the other side of inner spline 2, to realize the sealing of the other side of the connection between inner spline 2 and outer spline 4, prevent slurry from entering the connection between outer spline 4 and inner spline 2, avoid slurry from wearing the spline teeth of outer spline 4, thereby improve the service life of the spline of the grinding machine, reduce the cost required for the normal operation of the grinding machine;
[0034] In addition, the protected outer spline 4 does not need to use the more expensive anticorrosive stainless steel any more, further reducing the cost required for the normal operation of the grinding machine.
[0035] Embodiment 2
[0036] On the basis of example 1, as Figure 1As shown, after placing the grommet plate 9 at the end of the outer spline 4, the first bolt 10 on the grommet plate 9 is turned to make the first bolt 10 enter the outer spline 4, so as to fix the grommet plate 9 on the outer spline 4, and at the same time, the grommet plate 9 is in contact with the inner spline 2, realizing the double-layer sealing at the other side of the connection between the inner spline 2 and the outer spline 4, further preventing the pulp from entering the connection between the outer spline 4 and the inner spline 2, avoiding the pulp from wearing the spline teeth of the outer spline 4, and further improving the service life of the spline of the refiner and reducing the cost required for the normal operation of the refiner.
[0037] In addition, the first sealing ring 11 is arranged between the first protective sleeve 5 and the shaft sleeve 8 to prevent the pulp from entering the spline through the gap between the first protective sleeve 5 and the shaft sleeve 8; the second sealing ring 12 is arranged between the second protective sleeve 6 and one side of the inner spline 2 to prevent the pulp from entering the spline through the gap between the second protective sleeve 6 and the inner spline 2; the third sealing ring 13 is arranged between the third protective sleeve 7 and the other side of the inner spline 2 to prevent the pulp from entering the spline through the gap between the third protective sleeve 7 and the inner spline 2; the piston sealing ring 14 in sliding contact with the first protective sleeve 5 is arranged on the second protective sleeve 6 to prevent the pulp from entering the spline through the gap between the first protective sleeve 5 and the second protective sleeve 6, thereby avoiding the pulp from wearing the spline teeth of the outer spline 4, further improving the service life of the spline of the refiner, and reducing the cost required for the normal operation of the refiner.
[0038] Example 3
[0039] On the basis of Example 1, as Figure 1 and Figure 2As shown, after the fixed rod 16 is sequentially threaded through the third protective sleeve 7, the inner spline 2, and the first through hole 17, the second through hole 18, and the third through hole 19 provided on the sliding block 15, the sliding block 15 provided on the millstone shaft 1 is pushed inward, the top pin 21 provided thereon corresponds to the groove 20 provided on the fixed rod 16, and the first spring 23 provided between the sliding block 15 and the millstone shaft 1 is compressed. Then, the top pin 21 on the sliding block 15 is rotated, the end thereof enters the groove 20, and the resistance generated after the top pin 21 contacts the groove 20 causes the sliding block 15 to move together with the fixed rod 16. Then, the rebound force generated after the first spring 23 is compressed moves outward through the sliding block 15, thereby driving the fixed rod 16 to move together with the sliding block 15 until the protrusion 22 provided on the other side of the fixed rod 16 contacts the third protective sleeve 7, thereby realizing the fixation of the inner spline 2 and the third protective sleeve 7 on the millstone shaft 1. In addition, at this time, the first spring 23 is still in a compressed state, the spring force generated thereby is transmitted to the protrusion 22 through the sliding block 15 and the fixed rod 16, acts on the third protective sleeve 7, and further extrudes the third sealing ring 13 provided between the third protective sleeve 7 and the inner spline 2, thereby further preventing the slurry from entering the spline through the gap between the third protective sleeve 7 and the inner spline 2, avoiding the wear of the spline teeth of the outer spline 4 by the slurry, and thereby improving the service life of the spline of the grinding machine and reducing the cost required for the normal operation of the grinding machine.
[0040] Example 4
[0041] On the basis of Example 1, as shown in Figure 1 and Figure 2 the second bolt 25 is threaded through the four through holes and is screwed with the inner spline 2. Then, the second spring 27 is sleeved on the outside of the second bolt 25, the nut 26 is placed at the end of the second bolt 25, the nut 26 is rotated on the second bolt 25, moves on the second bolt 25, and compresses the second spring 27 between the nut 26 and the second protective sleeve 6. At the same time, the rebound force generated after the second spring 27 is compressed acts on the second protective sleeve 6, further extrudes the second sealing ring 12 provided between the second protective sleeve 6 and the inner spline 2, further prevents the slurry from entering the spline through the gap between the third protective sleeve 7 and the inner spline 2, avoids the wear of the spline teeth of the outer spline 4 by the slurry, and thereby improves the service life of the spline of the grinding machine and reduces the cost required for the normal operation of the grinding machine.
Claims
1. A refiner spline protection device comprising a protection cover fitted outside a spline, the spline comprising an inner spline (2) provided on a refiner shaft (1) and an outer spline (4) provided on an output shaft (3), the inner spline (2) being fitted outside the outer spline (4), characterized in that: The protective cover comprises a first protective sleeve (5), a second protective sleeve (6) and a third protective sleeve (7), the output shaft (3) is provided with a shaft sleeve (8), the first protective sleeve (5) is arranged on the outer side of the shaft sleeve (8), the second protective sleeve (6) is arranged on one side of the inner spline (2) and is in sliding contact with the first protective sleeve (5), and the third protective sleeve (7) is arranged on the other side of the inner spline (2) and wraps the end of the outer spline (4).
2. A pulper spline guard according to claim 1, characterised in that: The outer spline (4) is provided with a gland plate (9) in contact with the inner spline (2), and the gland plate (9) is provided with a first bolt (10) in threaded connection with the outer spline (4).
3. A pulper spline guard according to claim 1, characterised in that: The first protective sleeve (5) and the shaft sleeve (8) are provided with a first sealing ring (11).
4. A pulper spline guard according to claim 1, characterized in that: The second protective sleeve (6) and one side of the inner spline (2) are provided with a second sealing ring (12).
5. A pulper spline guard according to claim 1, characterized in that: The third protective sleeve (7) and the other side of the inner spline (2) are provided with a third sealing ring (13).
6. A pulper spline guard according to claim 1, characterized in that: The second protective sleeve (6) is provided with a piston sealing ring (14) in sliding contact with the first protective sleeve (5).
7. A pulper spline guard according to claim 1, characterized in that: The millstone shaft (1) is slidably connected with a plurality of sliding blocks (15), further comprising a fixing rod (16), the third protective sleeve (7), the inner spline (2) and the sliding block (15) are respectively provided with a first through hole (17), a second through hole (18) and a third through hole (19) for the fixing rod (16) to pass through, one end of the fixing rod (16) is provided with a groove (20), the sliding block (15) is threadedly connected with a jackscrew (21) in plug-in cooperation with the groove (20), the other end of the fixing rod (16) is provided with a protrusion (22) in contact with the third protective sleeve (7), and the sliding block (15) and the millstone shaft (1) are provided with a first spring (23).
8. A pulper spline guard according to claim 1, characterized in that: The second protective sleeve (6) is provided with a fourth through hole (24), further comprising a second bolt (25), the second bolt (25) is in threaded connection with the inner spline (2) after passing through the fourth through hole (24), the second bolt (25) is threadedly connected with a nut (26), and the nut (26) and the second protective sleeve (6) are provided with a second spring (27).