A press roll for a paper machine

Abstract

The utility model relates to papermaking machinery technical field, specifically disclose a kind of press roll for paper machine, including roll body, the bearing seat of roll neck and installation roll neck being located at the both ends of roll body, multiple annular grooves are evenly provided on the outer surface of roll body, each annular groove is equipped with spiral convex edge, spiral drainage channel is formed between the convex edge and annular groove side wall;Elastic connecting assembly is equipped between roll neck and bearing seat, and the elastic connecting assembly includes the elastic bushing of sleeveing in the roll neck, the positioning pressure ring of being equipped with outside the elastic bushing, and the bolt of fixed positioning pressure ring and bearing seat, the elastic bushing both ends are respectively abutted roll neck and bearing seat;The press roll improves dehydration efficiency through spiral drainage channel, composite layer structure optimizes heat conduction uniformity, and elastic connecting assembly reduces vibration wear, and utilize hollow temperature control cavity to accurately control roll body temperature, to significantly improve papermaking quality, extend equipment life and reduce energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of papermaking machinery technology, and specifically discloses a press roll for a papermaking machine. Background Technology

[0002] In the papermaking industry, press rolls are one of the key components of a paper machine, and their performance directly affects paper quality and production efficiency. Traditional paper machine press rolls typically employ a simple, smooth roll surface design. During the pressing process, it is difficult to quickly drain moisture from the paper web, easily leading to uneven paper moisture content, affecting paper smoothness and strength. Poor drainage also reduces pressing efficiency. Furthermore, the neck and bearing housing of traditional press rolls are often rigidly connected, making it difficult to effectively buffer and absorb vibrations during paper machine operation. This not only generates significant noise but also accelerates wear on the neck and bearing housing, shortening equipment lifespan. In addition, the materials and structure of traditional press rolls are insufficient in terms of thermal conductivity and wear resistance, making them ill-suited for the high-temperature, high-pressure, and high-speed operating environment of papermaking. This results in difficulty in precisely controlling roll temperature, affecting paper quality, and frequent roll replacements increase production costs.

[0003] Therefore, developing a paper machine press roll that can effectively drain water, reduce vibration and noise, and improve wear resistance and temperature control performance is of great practical significance. Utility Model Content

[0004] This utility model proposes a press roll for a papermaking machine. This press roll solves the problems of poor drainage, large vibration, and poor temperature control performance of traditional press rolls, thereby improving paper quality and production efficiency and extending the service life of the equipment.

[0005] This utility model is implemented as follows: a press roll for a papermaking machine includes a roll body, roll necks at both ends of the roll body, and bearing seats for mounting the roll necks. Multiple annular grooves are evenly distributed on the outer surface of the roll body, and each annular groove contains a spiral ridge. The ridges and the sidewalls of the annular grooves form a spiral drainage channel. An elastic connection assembly is provided between the roll necks and the bearing seats. The elastic connection assembly includes an elastic bushing fitted onto the roll necks, a positioning ring located outside the elastic bushing, and bolts fixing the positioning ring to the bearing seats. The two ends of the elastic bushing abut against the roll necks and the bearing seats, respectively.

[0006] The roller body consists of a wear-resistant alloy surface layer, a nano-silicon carbide thermal conductive layer, and a stainless steel substrate from the outside to the inside. The roller body has a hollow temperature control cavity inside, and the two ends of the temperature control cavity are connected to the inside of the roller neck. The roller neck on both sides has a liquid inlet and a liquid outlet connected to the hollow temperature control cavity.

[0007] As a preferred embodiment of the press roll for a papermaking machine according to this utility model, the depth of the annular groove is 2-5mm, and the distance between two adjacent annular grooves is 10-20mm.

[0008] As a preferred embodiment of the press roll for a papermaking machine according to this utility model, the height of the convex ridge is 1-3mm, and the spiral direction is clockwise or counterclockwise.

[0009] As a preferred embodiment of the press roll for a papermaking machine according to this utility model, the wear-resistant alloy surface is coated with a ceramic coating with a thickness of 0.3-0.5mm and a hardness ≥HV1000.

[0010] As a preferred embodiment of the press roll for a papermaking machine according to this utility model, the elastic bushing is made of rubber or silicone, and its inner diameter is adapted to the outer diameter of the roll neck.

[0011] As a preferred embodiment of the press roll for a papermaking machine according to this utility model, the inner side of the positioning pressure ring is provided with an annular boss, and the annular boss is embedded in the outer side of the elastic bushing.

[0012] As a preferred embodiment of the press roll for a papermaking machine according to this utility model, the bearing housing is provided with a lubrication groove, and the lubrication groove is filled with grease.

[0013] As a preferred embodiment of the press roll for a papermaking machine according to this utility model, the outer end of the roll neck is connected to a three-way pipe via a universal joint, and both ends of the three-way pipe are equipped with control valves, and a temperature sensor is installed inside the hollow temperature control cavity.

[0014] The beneficial effects of this utility model are:

[0015] 1. The spiral drainage channel significantly improves the drainage efficiency during the paper pressing process, resulting in uniform paper moisture content and improved paper flatness, strength, and other quality indicators.

[0016] 2. The flexible connection components effectively buffer and absorb vibration, reducing noise during equipment operation, minimizing wear on the roller neck and bearing housing, and improving the stability and reliability of equipment operation.

[0017] 3. By combining the nano-silicon carbide thermal conductive layer and the hollow temperature control cavity, along with the temperature sensor and temperature control system, precise control of the roller temperature is achieved, ensuring that the paper is pressed at a suitable temperature and improving paper quality.

[0018] 4. The wear-resistant alloy surface layer and ceramic coating enhance the wear resistance and hardness of the roller body, extend the service life of the press roller, reduce the frequency of equipment replacement, and lower production costs. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction.

[0022] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure along the BB direction.

[0023] Figure 4 for Figure 2 A magnified structural diagram at point C.

[0024] The markings in the diagram are: 1. Roller body; 2. Roller neck; 3. Bearing seat; 4. Annular groove; 5. Raised ridge; 6. Spiral drainage channel; 7. Elastic bushing; 8. Positioning pressure ring; 9. Bolt; 10. Wear-resistant alloy surface layer; 11. Nano-silicon carbide thermal conductive layer; 12. Stainless steel substrate; 13. Hollow temperature control cavity; 14. Liquid inlet; 15. Liquid outlet; 16. Ceramic coating; 17. Annular boss; 18. Lubrication groove; 19. Universal joint; 20. T-pipe; 21. Control valve; 22. Temperature sensor. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0026] Please see Figure 1-4 A press roll for a papermaking machine includes a roll body 1, roll necks 2 located at both ends of the roll body 1, and bearing seats 3 for mounting the roll necks 2. Multiple annular grooves 4 are evenly distributed on the outer surface of the roll body 1. Each annular groove 4 has a spiral ridge 5 inside, and a spiral drainage channel 6 is formed between the ridge 5 and the side wall of the annular groove 4. An elastic connection assembly is provided between the roll neck 2 and the bearing seat 3. The elastic connection assembly includes an elastic bushing 7 sleeved on the roll neck 2, a positioning pressure ring 8 located outside the elastic bushing 7, and bolts 9 for fixing the positioning pressure ring 8 and the bearing seat 3. The two ends of the elastic bushing 7 abut against the roll neck 2 and the bearing seat 3, respectively.

[0027] The roller body 1 consists of a wear-resistant alloy surface layer 10, a nano-silicon carbide heat-conducting layer 11, and a stainless steel substrate 12 from the outside to the inside. The roller body 1 has a hollow temperature control cavity 13 inside, and the two ends of the temperature control cavity are connected to the inside of the roller neck 2. The roller neck 2 on both sides is provided with an inlet 14 and an outlet 15 that are connected to the hollow temperature control cavity 13.

[0028] In this embodiment: During the operation of the paper machine, the paper web enters the press rolls for pressing and dewatering; the spiral drainage channel 6 on the surface of the roll body 1 utilizes the special structure formed by the spiral ridge 5 and the annular groove 4 to guide the water in the paper web out along the spiral direction when the roll body 1 rotates, accelerating the water discharge speed and improving the dewatering efficiency; at the same time, the hollow temperature control cavity 13 inside the electric roll body 1 is connected to the external temperature control system through the liquid inlet 14 and liquid outlet 15 in the roll neck 2. The temperature control medium circulates in the hollow temperature control cavity 13, and the nano-silicon carbide heat-conducting layer 11 quickly conducts the heat on the surface of the roll body 1 to the temperature control medium, and the temperature sensor... 22 The temperature inside the hollow temperature control cavity 13 is monitored in real time, and the data is fed back to the temperature control system. The temperature control system adjusts the flow rate and temperature of the temperature control medium according to the set temperature to achieve precise control of the temperature of the roll body 1, so that the roll body 1 is kept at a suitable working temperature and the paper pressing quality is guaranteed. In addition, the elastic connection component between the roll neck 2 and the bearing seat 3 utilizes the elastic deformation of the elastic bushing 7 to effectively buffer and absorb the vibration generated during the operation of the paper machine, reduce the impact of vibration on the roll body 1 and the bearing seat 3, and reduce noise. At the same time, the setting of the positioning pressure ring 8 and the lubrication groove 18 further improves the stability of the connection and reduces friction and wear.

[0029] As a technical optimization of this utility model, the depth of the annular groove 4 is 2-5mm, and the distance between two adjacent annular grooves 4 is 10-20mm.

[0030] In this embodiment: the depth and spacing of the annular grooves 4 are limited, the structural parameters of the spiral drainage channel 6 are optimized, ensuring that the drainage channel has good drainage capacity and stability, improving drainage efficiency, and ensuring uniform paper moisture content.

[0031] As a technical optimization of this utility model, the height of the convex ridge 5 is 1-3mm, and the spiral direction is clockwise or counterclockwise.

[0032] In this embodiment, the design of the spiral drainage channel 6 is further improved by adjusting the height and spiral direction of the convex ridge 5, so that water can be discharged more smoothly along the spiral channel and the drainage effect is improved.

[0033] As a technical optimization of this utility model, the wear-resistant alloy surface layer 10 is coated with a ceramic coating 16, the coating thickness is 0.3-0.5mm, and the hardness is ≥HV1000.

[0034] In this embodiment: the ceramic coating 16 of the wear-resistant alloy surface layer 10 enhances the wear resistance and hardness of the roller body 1 surface, improves the service life of the roller body 1, and improves the surface quality of the paper.

[0035] As a technical optimization of this utility model, the elastic bushing 7 is made of rubber or silicone, and its inner diameter is adapted to the outer diameter of the roller neck 2.

[0036] In this embodiment, the material and size of the elastic bushing 7 ensure that the elastic connection assembly has good elasticity and shock absorption performance, effectively buffering vibration, reducing noise, and reducing equipment wear.

[0037] As a technical optimization of this utility model, an annular boss 17 is provided on the inner side of the positioning pressure ring 8, and the annular boss 17 is embedded in the outer side of the elastic bushing 7.

[0038] In this embodiment: the annular boss 17 inside the positioning pressure ring 8 ensures that the elastic bushing 7 is firmly installed, so that the elastic connection assembly can work reliably and enhance the stability of equipment operation.

[0039] As a technical optimization of this utility model, a lubrication groove 18 is provided on the inner side of the bearing housing 3, and the lubrication groove 18 is filled with grease.

[0040] In this embodiment, the lubrication groove 18 on the inner side of the bearing housing 3 can reduce the friction between the roller neck 2 and the bearing housing 3, reduce wear, extend the service life of the equipment, and improve the overall performance of the equipment in conjunction with the elastic connection component.

[0041] As a technical optimization of this utility model, the outer end of the roller neck 2 is connected to the three-way pipe 20 via the universal joint 19. Both ends of the three-way pipe 20 are equipped with control valves 21, and the hollow temperature control cavity 13 is equipped with a temperature sensor 22.

[0042] In this embodiment: the temperature sensor 22 inside the temperature control chamber facilitates the delivery and control of the temperature control medium, enabling precise monitoring and adjustment of the roller body 1 temperature, and ensuring the temperature stability of the paper pressing process.

[0043] Working principle and usage process of this utility model:

[0044] Install the press roll neck 2 inside the bearing housing 3 and connect and fix it through the elastic connection assembly, ensuring that the elastic bushing 7 is installed in place, and tighten the positioning pressure ring 8 with bolts 9; connect the universal joint 19 at the outer end of the roll neck 2 to the three-way pipe 20, adjust the control valve 21, connect the temperature control medium delivery pipeline, and debug the temperature control system; fill the lubrication groove 18 of the bearing housing 3 with grease; start the paper machine, the paper web enters the press roll, the roll body 1 rotates, the spiral drainage channel 6 starts working, and discharges the water in the paper web along the spiral direction; at the same time, the temperature control medium enters through the liquid inlet 14. The hollow temperature control cavity 13 circulates within the cavity, carrying away or replenishing heat. Temperature sensor 22 monitors the temperature in real time. The temperature control system adjusts the flow rate and temperature of the temperature control medium based on the feedback data to maintain a stable temperature for the roller body 1. During operation, the elastic connecting components buffer and absorb vibrations, reducing equipment wear and noise. The condition of the grease in the lubrication groove 18 of the bearing seat 3 is checked regularly and replenished or replaced in a timely manner. The operating status of the temperature control system and the temperature of the roller body 1 are monitored to ensure the temperature control effect. The connection status of the elastic connecting components and the condition of the elastic bushing 7 are checked to ensure that the shock absorption and noise reduction functions are normal.

[0045] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] However, the above are merely specific embodiments of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A press roll for a papermaking machine, comprising a roll body (1), roll necks (2) disposed at both ends of the roll body (1), and bearing seats (3) for mounting the roll necks (2), characterized in that: The outer surface of the roller body (1) is uniformly provided with multiple annular grooves (4), and each annular groove (4) is provided with a spiral ridge (5). The ridge (5) and the side wall of the annular groove (4) form a spiral drainage channel (6). An elastic connection assembly is provided between the roller neck (2) and the bearing seat (3). The elastic connection assembly includes an elastic bushing (7) sleeved on the roller neck (2), a positioning pressure ring (8) provided on the outside of the elastic bushing (7), and a bolt (9) for fixing the positioning pressure ring (8) and the bearing seat (3). The two ends of the elastic bushing (7) abut against the roller neck (2) and the bearing seat (3) respectively. The roller body (1) consists of a wear-resistant alloy surface layer (10), a nano-silicon carbide heat-conducting layer (11), and a stainless steel substrate (12) from the outside to the inside. The roller body (1) has a hollow temperature control cavity (13) inside. The two ends of the temperature control cavity are connected to the inside of the roller neck (2). The roller neck (2) on both sides has an inlet (14) and an outlet (15) connected to the hollow temperature control cavity (13).

2. A press roll for a papermaking machine according to claim 1, characterized in that: The depth of the annular groove (4) is 2-5mm, and the distance between two adjacent annular grooves (4) is 10-20mm.

3. A press roll for a papermaking machine according to claim 1, characterized in that: The height of the protruding ridge (5) is 1-3mm, and the spiral direction is clockwise or counterclockwise.

4. A press roll for a papermaking machine according to claim 1, characterized in that: The wear-resistant alloy surface layer (10) is coated with a ceramic coating (16) with a thickness of 0.3-0.5 mm and a hardness ≥ HV1000.

5. A press roll for a papermaking machine according to claim 1, characterized in that: The elastic bushing (7) is made of rubber or silicone, and its inner diameter is adapted to the outer diameter of the roller neck (2).

6. A press roll for a papermaking machine according to claim 1, characterized in that: The positioning pressure ring (8) has an annular boss (17) on its inner side, and the annular boss (17) is embedded in the outer side of the elastic bushing (7).

7. A press roll for a papermaking machine according to claim 1, characterized in that: The bearing housing (3) has a lubrication groove (18) on its inner side, and the lubrication groove (18) is filled with grease.

8. A press roll for a papermaking machine according to claim 1, characterized in that: The outer end of the roller neck (2) is connected to a three-way pipe (20) via a universal joint (19). Both ends of the three-way pipe (20) are equipped with control valves (21). A temperature sensor (22) is installed inside the hollow temperature control cavity (13).

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