Main transmission system of paper machine

Abstract

The utility model discloses a main transmission system of a paper machine, which comprises a net part forming roller, a carpet driving roller, a drying cylinder, a paper winding cylinder, a first motor assembly connected with the net part forming roller, a second motor assembly connected with the carpet driving roller, a third motor assembly connected with the drying cylinder, and a fourth motor assembly connected with the paper winding cylinder, the net part forming roller, the carpet driving roller, the drying cylinder and the paper winding cylinder are sequentially arranged in the running direction of paper, the first motor assembly comprises a first permanent magnet synchronous motor, the second motor assembly comprises a second permanent magnet synchronous motor, and the third motor assembly comprises a third permanent magnet synchronous motor and a fourth permanent magnet synchronous motor. The fourth motor assembly comprises a fifth permanent magnet synchronous motor. According to the paper machine main transmission system, the permanent magnet synchronous motor is adopted, compared with an asynchronous induction motor, a magnetic field can be more effectively utilized, the working efficiency of the paper machine main transmission system is improved, and the overall energy consumption of the paper machine main transmission system is reduced.

Description

Technical Field

[0001] The utility model relates to the field of papermaking equipment, in particular to a main transmission system of a paper machine. Background Art

[0002] Papermaking machine is a general term for a complete set of equipment that makes pulp form paper webs, including the main machines such as headbox, wire section, press section, drying section, calender, reel and transmission section, and auxiliary systems such as steam, water, vacuum, lubrication and heat recovery.

[0003] In the process of papermaking, each roller needs to accelerate, decelerate, start or stop under the drive of the motor, and sometimes the direction of rotation of the motor needs to be changed. These movement characteristics may cause the motor to operate in a less efficient working state. Currently, papermaking machines use asynchronous induction motors, which have high energy consumption. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a main transmission system for a paper machine.

[0005] The utility model solves the technical problem by adopting the technical solution: constructing a main transmission system of a paper machine, including a wire forming roller, a felt driving roller, a drying cylinder, a paper reeling cylinder, a first motor assembly connected to the wire forming roller, a second motor assembly connected to the felt driving roller, a third motor assembly connected to the drying cylinder, and a fourth motor assembly connected to the paper reeling cylinder;

[0006] The wire forming roller, the felt driving roller, the drying cylinder and the paper winding cylinder are arranged in sequence along the running direction of the paper;

[0007] The first motor component includes a first permanent magnet synchronous motor, the second motor component includes a second permanent magnet synchronous motor, the third motor component includes a third permanent magnet synchronous motor and a fourth permanent magnet synchronous motor, and the fourth motor component includes a fifth permanent magnet synchronous motor.

[0008] In some embodiments, the first motor assembly further includes a first coupling flange connected to the mesh forming roller, a first coupling connected to the first coupling flange, and a second coupling flange connected to the first coupling, and the second coupling flange is simultaneously connected to the first permanent magnet synchronous motor.

[0009] In some embodiments, the second motor assembly further includes a third coupling flange connected to the carpet-driving roller, a second coupling connected to the third coupling flange, and a fourth coupling flange connected to the second coupling, and the fourth coupling flange is simultaneously connected to the second permanent magnet synchronous motor.

[0010] In some embodiments, the third motor assembly also includes a fifth coupling flange connected to the drying cylinder, a third coupling connected to the fifth coupling flange, and a sixth coupling flange connected to the third coupling, and the sixth coupling flange is also connected to the third permanent magnet synchronous motor.

[0011] In some embodiments, the third motor assembly also includes a seventh coupling flange connected to the drying cylinder, a fourth coupling connected to the seventh coupling flange, and an eighth coupling flange connected to the fourth coupling, and the eighth coupling flange is also connected to the fourth permanent magnet synchronous motor.

[0012] In some embodiments, the fourth motor assembly also includes a ninth coupling flange connected to the paper winding cylinder, a fifth coupling connected to the ninth coupling flange, and a tenth coupling flange connected to the fifth coupling, and the tenth coupling flange is also connected to the fifth permanent magnet synchronous motor.

[0013] The implementation of the utility model has the following beneficial effects: the main drive system of the paper machine adopts a permanent magnet synchronous motor to drive the wire forming roller, the carpet driving roller, the drying cylinder, and the paper winding cylinder respectively. The three-phase symmetrical current passes through the three-phase winding of the stator of the permanent magnet synchronous motor, which will generate a stator rotating magnetic field. The stator rotating magnetic field generates current in the cage winding for the rotation of the rotor, generating a rotor rotating magnetic field. The asynchronous torque generated by the interaction between the stator rotating magnetic field and the rotor rotating magnetic field causes the rotor to rotate from stationary. After the start-up is completed, the rotor winding no longer works, and the magnetic field generated by the permanent magnet and the stator winding interacts to generate a driving torque. The efficiency of the permanent magnet synchronous motor is higher than that of the asynchronous induction motor, and the magnetic field can be used more effectively, thereby improving the working efficiency of the main drive system of the paper machine and reducing the overall energy consumption of the main drive system of the paper machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the utility model, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0015] Figure 1 It is a schematic diagram of the overall structure of a main transmission system of a paper machine in some embodiments of the utility model;

[0016] Figure 2 It is a schematic structural diagram of the third motor assembly in some embodiments of the present utility model. DETAILED DESCRIPTION

[0017] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0018] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0019] See also Figure 1 and Figure 2 , is a main transmission system of a paper machine of the utility model, comprising a wire forming roller 1, a felt driving roller 2, a drying cylinder 3, a paper reeling cylinder 4, a first motor assembly 5 connected to the wire forming roller 1, a second motor assembly 6 connected to the felt driving roller 2, a third motor assembly 7 connected to the drying cylinder 3, and a fourth motor assembly 8 connected to the paper reeling cylinder 4, the wire forming roller 1, the felt driving roller 2, the drying cylinder 3, and the paper reeling cylinder 4 are sequentially arranged along the running direction of the paper, the first motor assembly 5 includes a first permanent magnet synchronous motor 51, the second motor assembly 6 includes a second permanent magnet synchronous motor 61, the third motor assembly 7 includes a third permanent magnet synchronous motor 71 and a fourth permanent magnet synchronous motor 72, and the fourth motor assembly 8 includes a fifth permanent magnet synchronous motor 81.

[0020] The wire forming roller 1 is mainly used for calendering and coating the surface of paper. The uneven surface and roller pattern layout of the wire forming roller 1 can achieve the compaction of paper and uniform surface coating, making the paper surface smoother, with uniform thickness and density, and stable paper quality. The felt driving roller 2 is used to drive the felt to move. The drying cylinder 3 is used to continuously dry the paper blank after pulp forming in the papermaking process. The paper winding cylinder 4 is used to wind up the paper.

[0021] In this embodiment, the main drive system of the paper machine adopts a permanent magnet synchronous motor to drive the wire forming roller 1, the felt driving roller 2, the drying cylinder 3, and the paper winding cylinder 4 respectively. The three-phase symmetrical current passes through the three-phase winding of the stator of the permanent magnet synchronous motor, which will generate a stator rotating magnetic field. The stator rotating magnetic field generates current in the cage winding for the rotation of the rotor, generating a rotor rotating magnetic field. The asynchronous torque generated by the interaction between the stator rotating magnetic field and the rotor rotating magnetic field causes the rotor to rotate from static. After the start-up is completed, the rotor winding no longer works, and the magnetic field generated by the permanent magnet and the stator winding interacts to generate a driving torque. The efficiency of the permanent magnet synchronous motor is higher than that of the asynchronous induction motor. This is because the permanent magnet motor uses rare earth permanent magnet materials, which can more effectively utilize the magnetic field, improve the working efficiency of the main drive system of the paper machine, and reduce the overall energy consumption of the main drive system of the paper machine.

[0022] Specifically, the first motor assembly 5 further includes a first coupling flange 52 connected to the wire forming roller 1, a first coupling 53 connected to the first coupling flange 52, and a second coupling flange 54 connected to the first coupling 53, and the second coupling flange 54 is also connected to the first permanent magnet synchronous motor 51. The second motor assembly 6 further includes a third coupling flange 62 connected to the carpet driving roller 2, a second coupling 63 connected to the third coupling flange 62, and a fourth coupling flange 64 connected to the second coupling 63, and the fourth coupling flange 64 is also connected to the second permanent magnet synchronous motor 61.

[0023] like Figure 2As shown, the third motor assembly 7 also includes a fifth coupling flange 73 connected to the drying cylinder 3, a third coupling 74 connected to the fifth coupling flange 73, and a sixth coupling flange 75 connected to the third coupling 74. The sixth coupling flange 75 is also connected to the third permanent magnet synchronous motor 71. The third motor assembly 7 also includes a seventh coupling flange 76 connected to the drying cylinder 3, a fourth coupling 77 connected to the seventh coupling flange 76, and an eighth coupling flange 78 connected to the fourth coupling 77. The eighth coupling flange 78 is also connected to the fourth permanent magnet synchronous motor 72. The drying cylinder 3 is connected to two permanent magnet synchronous motors, which can change the rotation direction of the drying cylinder 3, improve the response speed during the movement of the drying cylinder 3, and can also choose to switch the permanent magnet synchronous motor to work, stop any permanent magnet synchronous motor, and switch to another permanent magnet synchronous motor. The permanent magnet synchronous motor also works as a single motor, has a simple and compact structure, occupies a small space, can increase the speed regulation range, and maintain the stability of the input working condition.

[0024] Furthermore, the fourth motor assembly 8 also includes a ninth coupling flange 82 connected to the paper reel cylinder 4, a fifth coupling 83 connected to the ninth coupling flange 82, and a tenth coupling flange 84 connected to the fifth coupling 83, and the tenth coupling flange 84 is simultaneously connected to the fifth permanent magnet synchronous motor 81. The above couplings can all be universal couplings.

[0025] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A main transmission system for a paper machine, characterized in that: The invention comprises a wire forming roller (1), a felt driving roller (2), a drying cylinder (3), a paper reeling cylinder (4), a first motor assembly (5) connected to the wire forming roller (1), a second motor assembly (6) connected to the felt driving roller (2), a third motor assembly (7) connected to the drying cylinder (3), and a fourth motor assembly (8) connected to the paper reeling cylinder (4); The wire forming roller (1), the felt driving roller (2), the drying cylinder (3), and the paper winding cylinder (4) are arranged in sequence along the running direction of the paper; The first motor component (5) includes a first permanent magnet synchronous motor (51), the second motor component (6) includes a second permanent magnet synchronous motor (61), the third motor component (7) includes a third permanent magnet synchronous motor (71) and a fourth permanent magnet synchronous motor (72), and the fourth motor component (8) includes a fifth permanent magnet synchronous motor (81).

2. The main transmission system of the paper machine according to claim 1, characterized in that: The first motor assembly (5) further comprises a first coupling flange (52) connected to the mesh forming roller (1), a first coupling (53) connected to the first coupling flange (52), and a second coupling flange (54) connected to the first coupling (53); the second coupling flange (54) is also connected to the first permanent magnet synchronous motor (51).

3. The main transmission system of the paper machine according to claim 1, characterized in that: The second motor assembly (6) further comprises a third coupling flange (62) connected to the carpet-driving roller (2), a second coupling (63) connected to the third coupling flange (62), and a fourth coupling flange (64) connected to the second coupling (63); the fourth coupling flange (64) is also connected to the second permanent magnet synchronous motor (61).

4. The main transmission system of the paper machine according to claim 1, characterized in that: The third motor assembly (7) also includes a fifth coupling flange (73) connected to the drying cylinder (3), a third coupling (74) connected to the fifth coupling flange (73), and a sixth coupling flange (75) connected to the third coupling (74); the sixth coupling flange (75) is also connected to the third permanent magnet synchronous motor (71).

5. The main transmission system of the paper machine according to claim 1, characterized in that: The third motor assembly (7) also includes a seventh coupling flange (76) connected to the drying cylinder (3), a fourth coupling (77) connected to the seventh coupling flange (76), and an eighth coupling flange (78) connected to the fourth coupling (77); the eighth coupling flange (78) is also connected to the fourth permanent magnet synchronous motor (72).

6. The main transmission system of the paper machine according to claim 1, characterized in that: The fourth motor assembly (8) further comprises a ninth coupling flange (82) connected to the paper reel cylinder (4), a fifth coupling (83) connected to the ninth coupling flange (82), and a tenth coupling flange (84) connected to the fifth coupling (83); the tenth coupling flange (84) is also connected to the fifth permanent magnet synchronous motor (81).

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