A carbon fiber breast roller assembly for shaking

Abstract

The traditional support structure of the breast roller with vibration uses carbon fiber plates or stainless steel spring plates to support the bearing seats at both ends of the breast roller. The breast roller and the bearing seat swing as a whole. The elastic plates used for support or hanging are prone to fatigue fracture under high-speed vibration, and are troublesome to operate when changing the screen. The present application fixes the breast roller bearing seat on the breast roller support seat, and the breast roller is supported in the bearing seat by a special axially movable bearing. It can both rotate and swing axially. There are no vulnerable parts with short lifespans, which can ensure the smooth operation of the paper machine. If the traditional roller shaft head is worn, the shaft head needs to be heated and then interference fit after replacement. Heating will cause damage to the coating on the outside of the roller surface. Therefore, once the shaft head is worn, it is difficult to repair the roller perfectly. The present application avoids interference fit assembly by using a tension sleeve. No heating is required, and the shaft can be easily installed in the blind head without damaging the carbon fiber roller and the coating on the outside.

Description

Technical Field

[0001] The invention belongs to papermaking equipment, and in particular relates to a carbon fiber breast roll assembly for shaking. Background Art

[0002] The breast roll of a paper machine is the first roll in the wire section, directly affecting the sizing uniformity of the wire and, consequently, the quality of the final paper. One common measure to improve sizing uniformity is to vibrate the breast roll. This involves installing a vibration device on the drive side of the breast roll. This device causes the breast roll to rapidly oscillate axially, causing the forming wire on the breast roll to also oscillate rapidly axially, thereby improving the sizing uniformity across the wire.

[0003] There are two types of traditional support structures with shaking breast rollers. One is the support type, such as Figure 1 As shown, the bearing seats at both ends of the breast roll are supported by carbon fiber plates or stainless steel spring plates. The axial force generated by the shaking device causes the breast roll to swing rapidly in the axial direction under the support of the elastic plate. Another structure is the hanging type, such as Figure 2 As shown, the breast roll is suspended via the bearing housing using an elastic plate. Both structures share the commonality that the breast roll and bearing housing swing as a single unit. However, disadvantages include: the elastic plate used for support or suspension is susceptible to fatigue fracture under high-speed vibration, and screen changes are cumbersome. Furthermore, traditional breast rolls are made of steel or cast iron, which are heavy and have high inertia, consuming significant power during high-speed vibration.

[0004] Rollers in papermaking machines are used for guiding various purposes, including forming wires, felts, dryer fabrics, and paper. Depending on their purpose, rollers are covered with various materials, including rubber, polyurethane, and chrome plating. Most rollers have bearings mounted on their shafts, supported by bearing blocks. During roller operation, slippage between the inner diameter of the bearing and the outer diameter of the shaft bearing is common. Once this slippage occurs, the shaft will quickly wear out and become unusable.

[0005] There are two main common roller structures: Figure 3 As shown, one structural roller consists of a roller, a blind head at each end, and a shaft head at each end. The inner diameter of the blind head and the outer diameter of the shaft head are interference fit, and need to be heated for assembly. The inner diameters of the roller's ends are interference fit with the outer diameter of the blind head, and also need to be heated for assembly. The second structure is similar to the first, except that the shaft head and the blind head are integrally formed, and the roller consists of a roller and a shaft head at each end. The outer diameter of the large end of the shaft head and the inner diameter of the roller's ends are interference fit, and need to be heated for assembly. If the traditional roller shaft head is worn, replacing the shaft head requires heating the roller and then interference fitting, and heating will cause damage to the coating on the outside of the roller surface. Therefore, once the shaft head is worn, it is difficult to repair the roller perfectly. Summary of the Invention

[0006] In order to solve the defects of the vibrating breast roller in the prior art, namely, the supporting device is prone to fatigue fracture under high-speed vibration; and the breast roller is not convenient to replace the shaft head, and replacing the shaft head will cause great losses. In addition, in order to reduce the weight of the breast roller and reduce the energy consumption of the vibrating device, the present application provides a carbon fiber breast roller assembly for vibration.

[0007] The object of the present invention is achieved in the following manner:

[0008] A carbon fiber breast roll assembly for shaking, comprising a breast roll, with shaft heads provided at both ends of the breast roll, and bearing devices provided on the shaft heads. The invention is characterized in that the bearings in the bearing devices are special bearings, and the special bearings are composed of a bearing outer ring, a bearing inner ring, a roller, and a retaining frame. The width of the bearing inner ring is 25-30 mm wider than that of the bearing outer ring. The roller is cylindrical with arc chamfers at both ends. A retaining frame is provided inside the bearing outer ring, and a roller is provided inside the retaining frame.

[0009] The shaft heads are respectively an operating shaft head and a transmission shaft head. A coupling is provided at the end of the transmission shaft head. The coupling includes a bearing chamber. The end of the transmission shaft head is installed in the bearing chamber. Two tapered roller bearings are provided between the end of the transmission shaft head and the bearing chamber.

[0010] The breast roll includes a roller, each end of the roller is provided with a blind head, an axis head is provided in the blind head, the blind head includes an outer cylinder, an inner cylinder at the roller end, an inner sleeve, and three annular plates, the three annular plates are an outer annular plate, a middle annular plate and an inner annular plate, wherein the middle annular plate and the inner annular plate are parallel and connected to the inner sleeve, the outer annular plate is connected to the inner cylinder at the roller end, the axis head is provided with an axis head flange that cooperates with the end of the inner sleeve connected to the middle annular plate, and a tension sleeve is provided on the axis head at a position that cooperates with the inner cylinder at the roller end.

[0011] The roller is made of carbon fiber material.

[0012] The inner diameter of the inner cylinder at the roller end is greater than or equal to the outer diameter of the shaft head flange.

[0013] A pin is arranged outside the shaft head flange, and the pin sleeve is arranged inside the inner sleeve.

[0014] Compared with the prior art, the advantages of this application are:

[0015] The breast roller bearing seat is fixed on the breast roller support seat. The breast roller is supported in the bearing seat by a special axially movable bearing. It can rotate and swing axially. There are no wearing parts with short life, which can ensure the smooth operation of the paper machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the traditional supported breast roll support structure;

[0017] Figure 2This is a schematic diagram of the traditional hanging breast roller support structure;

[0018] Figure 3 This is a schematic diagram of the traditional breast roller shaft head structure;

[0019] Figure 4 This is a structural diagram of the end face of the breast roll support seat of the present application;

[0020] Figure 5 It is a schematic diagram of the structure of this application;

[0021] Figure 6 This is a schematic structural diagram of the breast roll bearing device of the present application;

[0022] Figure 7 This is a schematic diagram of the structure of the breast roller coupling of this application;

[0023] Figure 8 This is a structural diagram of the replaceable shaft head structure of the breast roller of the present application;

[0024] Figure 9 This is a schematic end view of the replaceable shaft head structure of the breast roller of this application.

[0025] Among them, 1. Roller; 2. Blind head; 21. Outer cylinder; 22. Annular plate; 222. Hole; 23. Inner cylinder of roller end; 24. Inner sleeve; 25. Rib plate; 26. Safety pin; 3. Tension sleeve; 4. Drive shaft head; 41. Second section of the inner end of the shaft head; 42. Shaft head flange; 43. Shaft head tail end; 5. Coating; 6. Baffle; 7. Bearing device; 71. Bearing seat; 72. Special bearing; 73. Bearing device oil seal; 8. Coupling; 81. Bearing chamber; 82. Tapered roller bearing; 83. Coupling oil seal; 9. Vibration device; 91. Vibration output shaft; 10. Operating shaft head. DETAILED DESCRIPTION

[0026] The present application is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of the present application and actual conditions.

[0027] In this application, unless otherwise expressly specified and limited, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0028] See Figure 5 A carbon fiber breast roll assembly for shaking includes a breast roll, with shaft heads set at both ends of the breast roll. The shaft heads are divided into an operating shaft head 10 and a transmission shaft head 4. The operating shaft head 10 and the transmission shaft head 4 are respectively provided with a bearing device 7. The end of the transmission shaft head 4 is connected to one end of the shaking output shaft 91 through a coupling 8. The other end of the shaking output shaft 91 is connected to the shaking device 9. The two bearing devices 7 are respectively fixed as follows Figure 4 On the breast roll support shown.

[0029] Here we take the transmission shaft head 4 as an example to illustrate. Figure 6 The bearing device 7 includes a bearing seat 71, the outer ring of the special bearing 72 is fixed in the bearing seat 71, and the inner ring is fixed on the transmission shaft head 4. The special bearing 72 is composed of a bearing outer ring, a bearing inner ring, a roller, and a retaining frame. The width of the bearing inner ring is 25-30 mm wider than the bearing outer ring. The roller is a cylinder with arc chamfers at both ends. A retaining frame is set inside the bearing outer ring, and a roller is set inside the retaining frame. This design allows the roller of the special bearing 72 to rotate normally on the bearing inner ring and move axially smoothly. A bearing device oil seal 73 is set between the two ends of the bearing seat 71 and the transmission shaft head 4 to prevent oil leakage; the structure and connection method of the bearing device 7 on the operating shaft head 10 are the same as those of the transmission shaft head 4.

[0030] The patented special bearing 72 differs from the axially movable cylindrical roller bearings of the prior art: the inner and outer rings of standard cylindrical roller bearings are of equal width. A certain degree of axial misalignment between the inner and outer rings during installation allows for use, but the bearings can only rotate during operation and cannot continuously move axially back and forth for extended periods. The patented breast roller can generally move ±15mm, but in actual operation, the range is generally ±10-13, with an oscillation frequency of 600-800 times per second. Therefore, the inner ring of the special bearing is much wider than the outer ring. Furthermore, the roller shape has been optimized for rapid axial movement.

[0031] The bearing devices 7 at both ends of the breast roller have the same structure. The bearing seat 71 of the bearing device 7 is fixed on the breast roller support seat. The breast roller body swings at high speed along the axial direction under the drive of the shaking device 9, and rotates around the axis under the drive of the forming mesh. The use of a special bearing 72 that can move along the axial direction can prevent the bearing device 7 and the breast roller support seat from swinging.

[0032] See Figure 7The coupling 8 is installed at the outer end of the transmission shaft head 4, and the transmission shaft head 4 of the rotating breast roller is connected with the axially high-speed swinging shaking device 9 through the shaking output shaft 91. The conventional coupling 8 transmits the rotational power to the roller to drive the roller to rotate. The breast roller with the shaking device 9 is different from the conventional roller. The rotation of the breast roller is driven by the forming net sleeved on the surface of the breast roller cylinder 1. The shaking output shaft 91 of the shaking device 9 does not rotate, but only moves axially rapidly. The moving stroke is generally 0-25mm, and the moving frequency is generally 100-800Hz. The coupling 8 of the present application is a special coupling 8, whose function is to generate high-speed axial movement by the shaking device 9, and transmit it to the transmission shaft head 4 of the breast roller through the shaking output shaft 91, so that the breast roller swings rapidly along the axial direction. In addition, the normal rotation of the breast roller shaft head must be guaranteed.

[0033] The coupling 8 includes a bearing chamber 81, one end of which is closed and connected to one end of the shaking output shaft 91, and the other end is open. The outer end of the transmission shaft head 4 is installed in the bearing chamber 81 and is sealed by the coupling oil seal 83 to prevent oil leakage. Two tapered roller bearings 82 are arranged between the transmission shaft head 4 and the bearing chamber 81.

[0034] The bearing chamber 81 of the coupling 8 is connected to the vibration output shaft 91 of the vibration device 9. This transmits the high-speed axial swinging motion of the vibration to the drive shaft head 4 of the breast roll through two tapered roller bearings 82, causing the breast roll to rotate and swing axially at high speed. The bearing chamber 81 of the coupling 8 and the vibration output shaft 91 only swing axially at high speed and do not rotate.

[0035] See Figure 8 、 Figure 9 The breast roll includes a roller 1, which is made of carbon fiber. A coating layer 5 is provided on the outside of the roller 1. The coating layer 5 can be coated with rubber or polyurethane. A blind head 2 is provided at each end of the roller 1. The blind head 2 is welded by an outer cylinder 21, three annular plates 22, an inner cylinder 23 at the roller end, an inner sleeve 24, and multiple rib plates 25, or is cast as a whole. The three annular plates 22 are respectively an outer annular plate, a middle annular plate and an inner annular plate according to their positions. The middle annular plate and the inner annular plate are respectively The plate is connected to the inner sleeve 24, the outer annular plate is connected to the inner cylinder 23 at the roller end, the outer diameter of the outer cylinder 21 is interference fit with the inner diameter of the roller 1, and the bulkhead 2 is first frozen during assembly to reduce the outer diameter, and then pressed into the holes at both ends of the roller 1. When the temperature of the bulkhead 2 returns to room temperature, the outer diameter expands and interferes with the inner diameter of the two ends of the roller 1. Finally, holes are drilled on the roller 1 and the bulkhead 2, and safety pins 26 are installed. Multiple ribs 25 are evenly distributed between the outer cylinder 21 of the bulkhead 2 and the inner sleeve 24 and the inner cylinder 23 at the roller end.

[0036] Here, take the transmission shaft head 4 as an example. The transmission shaft head 4 is provided in the blind head 2. The innermost end of the transmission shaft head 4 inserted into the roller is provided with a shaft head flange 42. The shaft head flange 42 can cooperate with the end of the inner sleeve 24 connected to the middle ring plate. The shaft head flange 42 and the inner sleeve 24 are respectively provided with screw holes at positions corresponding to the ends thereof. The shaft head flange 42 can be fixed to the end face of the inner sleeve 24 by bolts. The inner diameter of the roller end inner cylinder 23 should be greater than or equal to the outer diameter of the shaft head flange 42 to facilitate the replacement of the shaft head. A pin is provided outside the shaft head flange 42, that is, the shaft head tail end 43. The inner diameter of the inner sleeve 24 matches the outer diameter of the shaft head tail end 43, so that the shaft head tail end 43 can be sleeved in the inner sleeve 24; a tensioning sleeve 3 is provided at the second section 41 of the inner end of the shaft head in the transmission shaft head 4. When the shaft head flange 42 is fixed to the end face of the inner sleeve 24 by bolts, the position of the tensioning sleeve 3 is between the roller end inner cylinder 23 and the second section 41 of the inner end of the shaft head. The tensioning sleeve 3 can be fixed on the second section 41 of the inner end of the shaft head, or it can be used as a separate installation component; the outer end of the transmission shaft head 4 is the same as the prior art, with installation structures such as bearings, nuts, and labyrinth seals.

[0037] The three annular plates 22 are evenly distributed with a plurality of circular, elliptical or oblong holes 222 for inserting tools to tighten or loosen the bolts inside, and also for observing the situation inside the roller.

[0038] The end face of the roller and the outside of the blind head 2 are provided with a baffle 6 to prevent debris from entering the roller.

[0039] In the roller described in the present application, when the transmission shaft head 4 or the operating shaft head 10 is worn and needs to be replaced, the replacement method is as follows: Take the transmission shaft head 4 as an example for explanation, loosen the screws of the tensioning sleeve 3, the inner and outer diameters of the tensioning sleeve 3 shrink, and the tensioning sleeve 3 no longer has an interference fit with the transmission shaft head 4 and the blind head 2, then unscrew the fixing bolts on the shaft head flange 42, and the transmission shaft head 4 will be easily removed from the blind head 2; during installation, install the transmission shaft head 4 into the blind head 2, fix the shaft head flange 42 on the end face of the inner sleeve 24 by bolts, tighten the screws of the tensioning sleeve 3, so that the inner and outer diameters of the tensioning sleeve 3 are tightened at the same time, eliminating the gap between the inner cylinder 23 at the roller end and the second section 41 at the inner end of the shaft head, and tighten the transmission shaft head 4 and the blind head 2.

[0040] The advantages of this application are:

[0041] The bearing device 7 is fixed on the breast roller support seat, and the breast roller is supported in the bearing seat 71 by a special axially movable bearing 72. It can rotate and swing axially. There are no wearing parts with short life, which can ensure the smooth operation of the paper machine.

[0042] The coupling 8 adopts a double tapered roller bearing 82 structure, which can not only transmit the axial swinging motion but also ensure that the breast roller rotates easily.

[0043] The roller 1 is made of carbon fiber, which is light in weight and has low inertia. It can reduce the power of the shaking device 9 and save energy. For breast rollers of the same specifications, the roller 1 made of carbon fiber is 50-70% lighter than the steel roller 1, and the energy consumption of the shaking device 9 is reduced by more than 60%.

[0044] The use of a tension sleeve 3 avoids interference fit during assembly. Due to the use of the tension sleeve 3, the shaft head and the inner hole of the bulkhead 2 can be fitted with a clearance fit. Without heating, the shaft head can be easily installed into the bulkhead 2. Then, tightening the tension sleeve 3 screws simultaneously tightens the inner and outer diameters of the tension sleeve 3, eliminating the gap between the shaft head and the hole and tightening the shaft head and the hole. Disassembly requires only loosening the tension sleeve 3 screws, which shrinks the inner and outer diameters, allowing the shaft to be easily removed from the bulkhead 2 hole. This major advantage is that since heating is not required during installation, the carbon fiber roller 1 and the outer coating 5 will not be damaged.

[0045] The innermost end of the shaft head inserted into the roller is provided with a shaft head flange 42, which is connected to the inner sleeve 24 of the blind head 2 by bolts, so that the shaft head can withstand the large axial tension transmitted by the shaking.

[0046] The above is only a preferred embodiment of the present application. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present application, and these should also be regarded as the scope of protection of the present application.

Claims

1. A carbon fiber breast roll assembly for shaking, comprising a breast roll, wherein shaft heads are provided at both ends of the breast roll, and bearing devices are provided on the shaft heads, characterized in that: The bearing in the bearing device is a special bearing, which consists of a bearing outer ring, a bearing inner ring, rollers, and a cage. The width of the bearing inner ring is 25-30 mm wider than the bearing outer ring. The cage is arranged inside the bearing outer ring, and the rollers are arranged inside the cage. The shaft heads are respectively an operating shaft head and a transmission shaft head, a coupling is provided at the end of the transmission shaft head, the coupling includes a bearing chamber, the end of the transmission shaft head is installed in the bearing chamber, and two tapered roller bearings are provided between the end of the transmission shaft head and the bearing chamber; The breast roll includes a roller, and a blind head is provided at each end of the roller. A shaft head is provided in the blind head. The blind head includes an outer cylinder, an inner cylinder at the roller end, an inner sleeve, and three annular plates. The three annular plates are an outer annular plate, a middle annular plate, and an inner annular plate. The middle annular plate and the inner annular plate are parallel and connected to the inner sleeve. The outer annular plate is connected to the inner cylinder at the roller end. The shaft head is provided with a shaft head flange that cooperates with the end of the inner sleeve connected to the middle annular plate. A tension sleeve is provided at the position of the shaft head that cooperates with the inner cylinder at the roller end. The roller is made of carbon fiber; During assembly, first freeze the blind head to reduce the outer diameter, then press it into the holes at both ends of the roller. When the blind head temperature returns to room temperature, the outer diameter expands and interferes with the inner diameter of the roller at both ends. Finally, drill holes on the roller and the blind head and install safety pins. When the shaft head is worn and needs to be replaced, the replacement method is as follows: loosen the screws of the tension sleeve, the inner and outer diameters of the tension sleeve shrink, and the tension sleeve no longer has an interference fit with the shaft head and the blind head, then unscrew the fixing bolts on the shaft head flange, and remove the shaft head from the blind head; when installing, install the shaft head into the blind head, fix the shaft head flange to the end face of the inner sleeve with bolts, tighten the screws of the tension sleeve, so that the inner and outer diameters of the tension sleeve are tightened at the same time, eliminating the gap between the inner cylinder of the roller end and the second section of the inner end of the shaft head, and tightening the shaft head and the blind head.

2. The carbon fiber breast roll assembly for shaking according to claim 1, characterized in that: The inner diameter of the inner cylinder at the roller end is greater than or equal to the outer diameter of the shaft head flange.

3. The carbon fiber breast roll assembly for shaking according to claim 2, characterized in that: A pin is arranged outside the shaft head flange, and the pin sleeve is arranged inside the inner sleeve.

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