阅读说明：本技术 膜萃取清洗用输送系统以及张力自适应调节方法 (Conveying system for membrane extraction cleaning and tension self-adaptive adjusting method ) 是由 舒星火 陈禹 孙兆安 丁晓峰 于 2021-09-28 设计创作，主要内容包括：本发明属于锂电池生产技术领域,具体涉及一种膜萃取清洗用输送系统以及张力自适应调节方法。本膜萃取清洗用输送系统包括控制模块；若干储水箱；所述储水箱包括若干导辊,每根导辊均有相应的伺服电机驱动,所述伺服电机由控制模块控制；在相邻储水箱之间设置有主张力传感器,用于测试箱间张力；每个储水箱内的两相邻导辊形成传动组件单元；所述传动组件单元之间设置有从张力传感器,用于测试箱内张力。本发明的有益效果是,本发明的膜萃取清洗用输送系统,通过控制模块控制各导辊的伺服电机调节转速,以释放箱间张力,实现了张力精准调节,解决了只有一个主动轮时膜张力不均匀的技术问题。(The invention belongs to the technical field of lithium battery production, and particularly relates to a conveying system for membrane extraction cleaning and a tension self-adaptive adjusting method. The conveying system for membrane extraction cleaning comprises a control module; a plurality of water storage tanks; the water storage tank comprises a plurality of guide rollers, each guide roller is driven by a corresponding servo motor, and the servo motors are controlled by a control module; a main force sensor is arranged between the adjacent water storage tanks and used for testing the tension between the tanks; two adjacent guide rollers in each water storage tank form a transmission assembly unit; and a secondary tension sensor is arranged between the transmission component units and is used for testing the tension in the box. The conveying system for membrane extraction cleaning has the advantages that the control module controls the servo motors of the guide rollers to adjust the rotating speed so as to release tension between the boxes, accurate tension adjustment is realized, and the technical problem of uneven membrane tension when only one driving wheel is provided is solved.)

1. A membrane extraction cleaning transport system comprising:

a control module;

a plurality of water storage tanks (2);

the water storage tank (2) comprises a plurality of guide rollers (11), each guide roller (11) is driven by a corresponding servo motor (12), and the servo motors are controlled by a control module;

a main force sensor is arranged between the adjacent water storage tanks (2) and used for testing the tension between the tanks;

two adjacent guide rollers (11) in each water storage tank (2) form a transmission assembly unit (1);

a secondary tension sensor is arranged between the transmission component units (1) and used for testing the tension in the box;

the control module is electrically connected with the main tension sensor and each auxiliary tension sensor, and when the tension data between the boxes detected by the main tension sensor is abnormal, the speed of the servo motor (12) in the water storage tank with rich tension data is regulated to release the tension between the boxes.

2. The membrane extraction cleaning delivery system of claim 1,

setting tension T between boxes₁Setting T_min1＜T₁＜T_max1Wherein

T_min1Is the minimum value of the tension between the boxes; t is_max1Is the maximum value of the tension between the boxes;

when the tension T between the boxes is actually measured₁When the tension between the two tanks exceeds the minimum value or the maximum value, the control module detects the average tension T of each transmission component unit (1) in the front-stage water storage tank (2) and the rear-stage water storage tank (2)_averageWill calculate the tension difference T_DI.e. T_D=T₁-T_average；

And according to the tension difference T_DThe rotating speed of each servo motor (12) in the corresponding water storage tank (2) for driving the guide roller (11) is adjusted to release the tension between the tanks at one time。

3. The membrane extraction cleaning delivery system of claim 2,

after the control module finishes one-time release of the tension between the boxes, the control module detects the tension between the transmission assembly units (1) in the same box;

after the tension between the boxes is released once, the average tension T of each transmission assembly unit (1) in the boxes is calculated_newaverageAnd is located beyond the mean tension T_newaverageA maximum range of transmission assembly unit (1), the tension of the transmission assembly unit (1) is set to be T_nAnd n is the serial number of the transmission assembly units (1) in the box, and the transmission assembly units (1) are used as the center to sequentially release the tension to the transmission assembly units (1) on two sides and secondarily release the tension in the box.

4. The membrane extraction cleaning delivery system of claim 2,

setting the tension of the transmission component units (1) at the two sides of the central transmission component unit (1) as T_n-mAnd T_n+mWherein m is the serial number of the transmission assembly unit (1) in the box extending to two sides;

calculating the tension difference between stages_（n±m）DI.e. T_（n±m）D =T_n-T_（n±m）；

The control module is used for controlling the tension difference value T between stages_（n±m）DAnd adjusting the rotating speed of each servo motor (12) in the same water storage tank (2) to drive the guide roller (11) and secondarily releasing the tension in the tank.

5. A tension self-adaptive adjusting method for membrane extraction cleaning is characterized by comprising the following steps:

each guide roller (11) in the water storage tank (2) is driven by an independent servo motor (12);

two adjacent guide rollers (11) in the water storage tank (2) are set as a transmission component unit (1);

when the tension data among the tanks is abnormal, the transmission component unit (1) in the water storage tank with abundant tension data in the tanks is regulated to release the tension among the tanks.

6. The adaptive tension adjusting method for membrane extraction cleaning according to claim 5,

the method for regulating the speed of a transmission component unit (1) in a water storage tank with abundant tension data in the tank to release the tension between the tanks comprises the following steps:

setting tension T between boxes₁Setting T_min1＜T₁＜T_max1Wherein

T_min1Is the minimum value of the tension between the boxes; t is_max1Is the maximum value of the tension between the boxes;

when the tension T between the boxes is actually measured₁When the tension between the front stage water storage tank and the rear stage water storage tank exceeds the minimum value or the maximum value of the tension between the tanks, the average tension T of each transmission component unit (1) in the front stage water storage tank (2) and the rear stage water storage tank (2) is detected_averageWill calculate the tension difference T_DI.e. T_D=T₁-T_average；

And according to the tension difference T_DThe rotating speed of each servo motor (12) in the corresponding water storage tank (2) for driving the guide roller (11) is adjusted, and the tension between the tanks is released once.

7. The adaptive tension adjusting method for membrane extraction cleaning according to claim 6,

according to the tension difference T_DThe method for adjusting the rotating speed of the guide roller (11) driven by each servo motor (12) in the corresponding water storage tank (2) comprises the following steps:

setting a speed adjustment coefficient K between the tanks_TDIn units of tension/rotation speed;

V_average=T_D/K_TD。

8. the adaptive tension adjusting method for membrane extraction cleaning according to claim 7,

after the tension between the boxes is released once, the tension between the transmission assembly units (1) in the same box is detected;

after the tension between the boxes is released once, the average tension T of each transmission assembly unit (1) in the boxes is calculated_newaverageAnd is located beyond the mean tension T_newaverageA maximum range of transmission assembly unit (1), the tension of the transmission assembly unit (1) is set to be T_nAnd n is the serial number of the transmission assembly units (1) in the box, and the transmission assembly units (1) are used as the center to sequentially release the tension to the transmission assembly units (1) on two sides and secondarily release the tension in the box.

9. The adaptive tension adjusting method for membrane extraction cleaning according to claim 8,

setting the tension of the transmission component units (1) at the two sides of the central transmission component unit (1) as T_n-mAnd T_n+mWherein m is the serial number of the transmission assembly unit (1) in the box extending to two sides;

calculating the tension difference between stages_（n±m）DI.e. T_（n±m）D =T_n-T_（n±m）；

According to the difference T of the tension between stages_（n±m）DAnd adjusting the rotating speed of each servo motor (12) in the same water storage tank (2) to drive the guide roller (11) and secondarily releasing the tension in the tank.

10. The adaptive tension adjusting method for membrane extraction cleaning according to claim 9,

according to the difference T of the tension between stages_（n±m）DThe method for adjusting the rotating speed of the guide roller (11) driven by each servo motor (12) in the same water storage tank (2) comprises the following steps:

setting the speed adjustment coefficient K in the case_TDnIn units of tension/rotation speed;

V_n±m=T_（n±m）D/K_TDn。

Technical Field

The invention belongs to the technical field of lithium battery production, and particularly relates to a conveying system for membrane extraction cleaning and a tension self-adaptive adjusting method.

Background

The diaphragm with excellent performance plays an important role in improving the comprehensive performance of the battery, and NMP or DMAC residues exist on the surface of the diaphragm in the extraction process of the lithium battery diaphragm and need to be cleaned and hydrolyzed.

The existing diaphragm cleaning equipment is only provided with one driving wheel during the transmission of the diaphragm, and only the driving wheel is adjusted when the diaphragm tension is detected to be not in accordance with the standard, so that the adjustment is not accurate and the diaphragm tension is not uniform.

Disclosure of Invention

The invention aims to provide a conveying system for membrane extraction cleaning and a tension self-adaptive adjusting method, so as to solve the technical problem of uneven tension in the membrane transmission process.

In order to solve the technical problem, the invention provides a conveying system for membrane extraction cleaning, which comprises a control module; a plurality of water storage tanks; the water storage tank comprises a plurality of guide rollers, each guide roller is driven by a corresponding servo motor, and the servo motors are controlled by a control module; a main force sensor is arranged between the adjacent water storage tanks and used for testing the tension between the tanks; two adjacent guide rollers in each water storage tank form a transmission assembly unit; a secondary tension sensor is arranged between the transmission assembly units and used for testing the tension in the box; the control module is electrically connected with the main tension sensor and each auxiliary tension sensor, and when the tension data between the boxes detected by the main tension sensor are abnormal, the speed of the servo motor in the water storage tank with rich tension data is regulated to release the tension between the boxes.

In one embodiment, the inter-tank tension T is set₁Setting T_min1＜T₁＜T_max1Wherein T is_min1Is the minimum value of the tension between the boxes; t is_max1Is the maximum value of the tension between the boxes; when the tension T between the boxes is actually measured₁Beyond the minimum or maximum tension between the tanksDuring the value, the control module detects the average tension T of each transmission component unit in the front-stage water storage tank and the rear-stage water storage tank_averageWill calculate the tension difference T_DI.e. T_D=T₁-T_average(ii) a And according to the tension difference T_DAnd adjusting the rotating speed of each servo motor in the corresponding water storage tank to drive the guide roller, and releasing the tension between the tanks at one time.

In one embodiment, the control module detects the tension in the box between each transmission assembly unit in the same box after finishing releasing the tension in the box once; after the tension between the boxes is released once, the average tension T of each transmission assembly unit in the boxes is calculated_newaverageAnd is located beyond the mean tension T_newaverageA maximum range of transmission assembly unit with tension T_nAnd n is the serial number of the transmission assembly units in the box, and the transmission assembly units are used as the centers to sequentially release the tension to the transmission assembly units on two sides and secondarily release the tension in the box.

In one embodiment, the tension of the transmission assembly units on both sides of the central transmission assembly unit is set to be T_n-mAnd T_n+mWherein m is the serial number of the transmission assembly units in the box extending to two sides; calculating the tension difference between stages_n±mDI.e. T_n±mD =T_n-T_n±m(ii) a The control module is used for controlling the tension difference value T between stages_n±mDAnd adjusting the rotating speed of each servo motor in the same water storage tank to drive the guide roller, and releasing the tension in the tank for the second time.

The conveying system for membrane extraction cleaning with the tension self-adaptive adjusting function has the advantages that the guide rollers drive the membrane to move in the water storage tank to clean the membrane, the force sensor is arranged to detect the membrane tension between the adjacent water storage tanks, the tension sensor is arranged to detect the membrane tension between the two adjacent guide rollers in one water storage tank, and when the membrane tension data between the water storage tanks is abnormal, the control module controls the servo motors of the guide rollers to adjust the rotating speed so as to release the tension between the tanks, so that the tension accurate adjustment is realized, and the technical problem of uneven membrane tension in the transmission process is solved.

In another aspect, the invention also provides a tension self-adaptive adjusting method for membrane extraction cleaning, which comprises the following steps that each guide roller in a water storage tank is driven by an independent servo motor; two adjacent guide rollers in the water storage tank are set as a transmission assembly unit; when the tension data among the tanks is abnormal, the transmission component unit in the water storage tank with abundant tension data in the tanks is regulated to release the tension among the tanks.

In one embodiment, a method of regulating the speed of a drive assembly unit in a storage tank having an abundance of in-tank tension data to release inter-tank tension includes setting an inter-tank tension T₁Setting T_min1＜T₁＜T_max1Wherein T is_min1Is the minimum value of the tension between the boxes; t is_max1Is the maximum value of the tension between the boxes; when the tension T between the boxes is actually measured₁When the tension between the front-stage water storage tank and the rear-stage water storage tank exceeds the minimum value or the maximum value of the tension between the tanks, the average tension T of each transmission assembly unit in the front-stage water storage tank and the rear-stage water storage tank is detected_averageWill calculate the tension difference T_DI.e. T_D=T₁-T_average(ii) a And according to the tension difference T_DAnd adjusting the rotating speed of each servo motor in the corresponding water storage tank to drive the guide roller, and releasing the tension between the tanks at one time.

In one embodiment, the tension difference T is used_DThe method for adjusting the rotation speed of each servo motor driving guide roller in the corresponding water storage tank comprises setting an inter-tank rotation speed adjustment coefficient K_TDIn units of tension/rotation speed; v_average=T_D/K_TD。

In one embodiment, after one-time release of the tension between the boxes is completed, the tension in the boxes between the transmission assembly units in the same box is detected; after the tension between the boxes is released once, the average tension T of each transmission assembly unit in the boxes is calculated_newaverageAnd is located beyond the mean tension T_newaverageA maximum range of transmission assembly unit with tension T_nAnd n is the serial number of the transmission assembly units in the box, and the transmission assembly units are used as the centers to sequentially release the tension to the transmission assembly units on two sides and secondarily release the tension in the box.

In one embodiment, a center drive is setThe tension of the transmission component units on both sides of the component unit is respectively T_n-mAnd T_n+mWherein m is the serial number of the transmission assembly units in the box extending to two sides; calculating the tension difference between stages_n±mDI.e. T_n±mD =T_n-T_n±m(ii) a According to the difference T of the tension between stages_n±mDAnd adjusting the rotating speed of each servo motor in the same water storage tank to drive the guide roller, and releasing the tension in the tank for the second time.

In one embodiment, the tension difference value T between stages is used_n±mDThe method for regulating the rotation speed of guide rollers driven by servo motors in the same water storage tank comprises setting a rotation speed regulating coefficient K in the tank_TDnIn units of tension/rotation speed; v_n±m=T_n±mD/K_TDn。

The method for adaptively adjusting the tension for membrane extraction cleaning has the advantages that the transmission component units are arranged in the water storage tank, when the tension data among the tanks is abnormal, the transmission component units in the water storage tank with abundant tension data in the tanks can be adjusted in speed to release the tension among the tanks, the transmission component units with abnormal tension can be conveniently detected, and the speed is adjusted to adjust the tension.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic diagram of the structure of a membrane extraction cleaning transport system of the present invention;

FIG. 2 is a schematic diagram of the structure of the water storage tank of the present invention;

FIG. 3 is a block diagram showing the control principle of the transport system for membrane extraction cleaning according to the present invention.

In the figure:

the device comprises a transmission assembly unit 1, a guide roller 11, a servo motor 12 and a synchronous belt 13;

a water storage tank 2.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, fig. 2 and fig. 3, the conveying system for membrane extraction cleaning of the present embodiment may include a control module; a plurality of water storage tanks 2; the water storage tank 2 comprises a plurality of guide rollers 11, each guide roller 11 is driven by a corresponding servo motor 12, and the servo motors are controlled by a control module; a main force sensor is arranged between the adjacent water storage tanks 2 and used for testing the tension between the tanks; two adjacent guide rollers 11 in each water storage tank 2 form a transmission assembly unit 1; a secondary tension sensor is arranged between the transmission component units 1 and used for testing the tension in the box; the control module is electrically connected with the main tension sensor and each auxiliary tension sensor, and when the tension data between the boxes detected by the main tension sensor is abnormal, the speed of the servo motor 12 in the water storage tank with rich tension data is regulated to release the tension between the boxes. In this embodiment, first storage water tank 2 is used for the diaphragm extraction for the coagulation bath, and back connects storage water tank 2 to be the wash bowl for wash the hydrolysis to diaphragm surface residue, can be provided with 8 deflector rolls 11 in every storage water tank 2, deflector roll 11 adopts hold-in range 13 with servo motor 12 to be connected, can alleviate the vibrations of equipment and basis, thereby play guard action and easy maintenance.

In the embodiment, the main tension sensor is suitable for testing the tension between the adjacent water storage tanks, the control module is suitable for acquiring the tension data between the adjacent water storage tanks, the water storage tank 2 with the tension data exceeding the minimum value or the maximum value of the tension between the tanks is positioned when the tension data between the tanks is abnormal, and the servo motor is controlled to drive the guide roller 11 arranged in the water storage tank to accelerate or decelerate so as to adjust the tension between the tanks; the control module is suitable for acquiring tension data in the box measured by the tension sensor after the tension between the boxes is adjusted, positioning the transmission assembly unit 1 exceeding the maximum range of the average tension, and controlling the servo motor to carry out secondary speed regulation to adjust the tension in the box, and the control module can adopt but is not limited to a PLC.

The membrane that this embodiment relates to extracts washs and uses conveying system with tension self-adaptation regulatory function, it realizes the membrane washing to drive the membrane through deflector roll 11 and carry out in storage water tank 2, detect the membrane tension between the adjacent storage water tank through main force transducer, through detecting the membrane tension between the two adjacent deflector rolls in a storage water tank from tension transducer, when the membrane tension data between the storage water tank is unusual, adjust the rotational speed through control module control each deflector roll 11's servo motor 12, with release intertank tension, the accurate regulation of tension has been realized, the inhomogeneous technical problem of membrane tension when having solved only a action wheel.

In the present embodiment, the inter-tank tension T is set in order to adjust the inter-tank tension₁Setting T_min1＜T₁＜T_max1Wherein T is_min1Is the minimum value of the tension between the boxes; t is_max1Is the maximum value of the tension between the boxes; when the tension T between the boxes is actually measured₁When the tension between the front-stage water storage tank 2 and the rear-stage water storage tank 2 exceeds the minimum value or the maximum value of the tension between the tanks, the control module detects the average tension T of each transmission component unit 1 in the front-stage water storage tank 2 and the rear-stage water storage tank 2_averageWill calculate the tension difference T_DI.e. T_D=T₁-T_average(ii) a And according to the tension difference T_DThe rotating speed of each servo motor 12 in the corresponding water storage tank 2 for driving the guide roller 11 is adjusted, and the tension between the tanks is released once.

In this embodiment, in order toFurther adjusting the tension between the transmission assembly units 1 in the water storage tank 2 to enable the membrane cloth to be stressed more uniformly, and detecting the in-tank tension between the transmission assembly units 1 in the same tank by the control module after the control module finishes releasing the inter-tank tension for one time; after the tension between the boxes is released once, the average tension T of each transmission assembly unit 1 in the boxes is calculated_newaverageAnd is located beyond the mean tension T_newaverageA maximum range of the transmission assembly unit 1, and a tension T set for the transmission assembly unit 1_nAnd n is the serial number of the transmission assembly units 1 in the box, and the transmission assembly units 1 are used as the centers to sequentially release tension to the transmission assembly units 1 on two sides, so that secondary release of the tension is realized.

In the present embodiment, in the method of secondarily releasing the tension in the case, the tensions of the transmission unit 1 on both sides of the central transmission unit 1 may be set to T, respectively_n-mAnd T_n+mWherein m is the serial number of the transmission assembly unit 1 in the box extending to two sides; calculating the tension difference between stages_n±mDI.e. T_n±mD =T_n-T_n±m(ii) a The control module is used for controlling the tension difference value T between stages_n±mDAnd adjusting the rotating speed of each servo motor 12 in the same water storage tank 2 to drive the guide roller 11, and secondarily releasing the tension in the tank.

The embodiment also relates to a tension self-adaptive adjusting method for membrane extraction cleaning, which comprises the following steps: each guide roller 11 in the water storage tank 2 is driven by an independent servo motor 12; two adjacent guide rollers 11 in the water storage tank 2 are set as a transmission component unit 1; when the tension data among the tanks is abnormal, the transmission component unit 1 in the water storage tank with abundant tension data in the tank is regulated to release the tension among the tanks.

In the tension adaptive adjustment method for membrane extraction cleaning in the embodiment, the plurality of transmission assembly units 1 are arranged in the water storage tank, so that when the inter-tank tension data is abnormal, the transmission assembly units 1 in the water storage tank with abundant intra-tank tension data can be adjusted in speed to release the inter-tank tension, the transmission assembly units 1 with abnormal tension can be conveniently detected, and the speed is adjusted to adjust the tension.

Optionally, in this embodiment, the transmission assembly in the water storage tank with abundant tension data in the tankThe method for regulating the speed of the unit 1 to release the tension between the tanks comprises setting the tension T between the tanks₁Setting T_min1＜T₁＜T_max1Wherein T is_min1Is the minimum value of the tension between the boxes; t is_max1Is the maximum value of the tension between the boxes; when the tension T between the boxes is actually measured₁When the tension between the front stage water storage tank 2 and the rear stage water storage tank 2 exceeds the minimum value or the maximum value of the tension between the tanks, the average tension T of each transmission component unit 1 in the front stage water storage tank 2 and the rear stage water storage tank 2 is detected_averageWill calculate the tension difference T_DI.e. T_D=T₁-T_average(ii) a And according to the tension difference T_DAdjusting the rotation speed of each servo motor 12 driving the guide roller 11 in the corresponding water storage tank 2, specifically, exceeding T_max1During the process, each servo motor 12 drives the guide roller 11 to decelerate below T_min1In the process, each servo motor 12 drives the guide roller 11 to accelerate, and further, the tension between boxes is released once.

In the present embodiment, the difference T in tension is used_DThe method for adjusting the rotating speed of each servo motor 12 driving the guide roller 11 in the corresponding water storage tank 2 comprises the step of setting an inter-tank rotating speed adjusting coefficient K_TDIn units of tension/rotation speed; v_average=T_D/K_TD。

In the present embodiment, after the inter-box tension is released once, the in-box tension between the transmission assembly units 1 in the same box is detected; after the tension between the boxes is released once, the average tension T of each transmission assembly unit 1 in the boxes is calculated_newaverageAnd is located beyond the mean tension T_newaverageA maximum range of the transmission assembly unit 1, and a tension T set for the transmission assembly unit 1_nAnd n is the serial number of the transmission assembly units 1 in the box, and the transmission assembly units 1 are used as the center to sequentially release tension to the transmission assembly units 1 on two sides and secondarily release the tension in the box.

In the present embodiment, the tensions of the transmission unit 1 on both sides of the central transmission unit 1 are set to T_n-mAnd T_n+mWherein m is the serial number of the transmission assembly unit 1 in the box extending to two sides; calculating the tension difference between stages_n±mDI.e. T_n±mD=T_n-T_n±m(ii) a According to the difference T of the tension between stages_n±mDRegulatingEach servo motor 12 in the same water storage tank 2 drives the rotating speed of the guide roller 11 to release the tension in the tank for the second time.

In the present embodiment, the inter-stage tension difference T is used_n±mDThe method for adjusting the rotating speed of the guide roller 11 driven by each servo motor 12 in the same water storage tank 2 comprises the following steps: setting the speed adjustment coefficient K in the case_TDnIn units of tension/rotation speed; v_n±m=T_n±mD/K_TDn。

In the present embodiment, where K_TDAnd K_TDnCan be obtained through priori knowledge, and K is obtained through obtaining the matching relation of tension and speed for a large amount of actually measured data_TDAnd K_TDnValue of K obtained as described above, and_TDand K_TDnAnd substituting the value into a specific equation to obtain a corresponding speed regulation result.

In summary, according to the conveying system for membrane extraction cleaning with the tension adaptive adjustment function and the tension adaptive adjustment method provided by the embodiment, the tension between the boxes is detected, when the tension between the boxes is abnormal, the rotating speed of the transmission assembly unit 1 is adjusted preliminarily to realize the primary release of the tension in the boxes, then the tension between the transmission assembly units 1 is detected, and the tension is released to two sides in sequence aiming at the transmission assembly unit 1 with the largest fluctuation, so that the secondary release of the tension in the boxes is realized, the membrane tension can be effectively adjusted, and the membrane is stressed uniformly.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.