Anti-shaking gas separation membrane blade coating machine

Abstract

An anti-shaking gas separation membrane blade coater comprises a non-woven fabric feeding roller (1), a non-woven fabric receiving roller (2) and a scraping roller (3), and is characterized in that the non-woven fabric feeding roller (1) comprises a through shaft (11), a non-woven fabric roll (8) and a damper (9) are installed on the through shaft (11), and rolling bearings (10) are arranged at the two ends of the through shaft (11) to be supported and fixed to a machine base; the non-woven fabric receiving roller (2) comprises a rolling shaft (12), and a non-woven fabric roll and a motor (13) are mounted on the rolling shaft (12); rolling bearings (10) are also mounted at the two ends of the rolling shaft (12) and are fixed on the machine base; a plurality of guide rollers (14) are arranged between the non-woven fabric feeding roller (1) and the non-woven fabric receiving roller (2), and a rotary encoder (15) is arranged on the guide roller (14) closest to the non-woven fabric receiving roller (2). According to the utility model, the coating speed is stable in different batches, different manufacturers and different environment temperatures, the material waste is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a gas separation membrane technology, and more particularly to a gas separation membrane coating technology, specifically a vibration-resistant gas separation membrane coating machine. Background Technology

[0002] Currently, the production of gas separation membranes requires the coating of a functional layer onto the surface of nonwoven fabric, which must be of uniform thickness and free of defects. Existing coating machines use a PID algorithm for coating speed. However, due to the elasticity of the nonwoven fabric, this algorithm is coupled with the PID algorithm, causing severe vibrations. Furthermore, the elastic modulus of the nonwoven fabric is affected by batch, manufacturer, and ambient temperature, all of which render the original PID parameters ineffective. Each time the machine is started, a long period of debugging is required before the system can operate stably, resulting in waste of raw materials and low efficiency. Utility Model Content

[0003] The purpose of this invention is to address the problem that existing separation membrane coating machines, due to algorithm issues, require repeated adjustments to achieve vibration-free operation for different batches of nonwoven fabric, resulting in raw material waste and time-consuming labor. The invention aims to design a vibration-resistant gas separation membrane coating machine that can be started and operated directly.

[0004] The technical solution of this utility model is:

[0005] A vibration-resistant gas separation membrane coating machine includes a nonwoven fabric feeding roller 1, a nonwoven fabric taking-up roller 2, and a scraper roller 3. A scraper blade 4 and a liquid plate 5 are installed above the scraper roller 3. Coating liquid 6 falls along the liquid plate 5 onto the nonwoven fabric 7 that passes over the scraper roller 3. The nonwoven fabric feeding roller 1 includes a through shaft 11, on which a nonwoven fabric roll 8 and a damper 9 are mounted. Rolling bearings 10 at both ends of the through shaft 11 support and fix it to a machine base. The nonwoven fabric taking-up roller 2 includes a take-up shaft 12, on which a nonwoven fabric roll and a motor 13 are mounted. A speed sensor is mounted on the motor 13. Rolling bearings 10 are also mounted at both ends of the take-up shaft 12 and fixed to the machine base. Multiple guide rollers 14 are installed between the nonwoven fabric feeding roller 1 and the nonwoven fabric taking-up roller 2, and a rotary encoder 15 for measuring the nonwoven fabric travel speed is installed on the guide roller 14 closest to the nonwoven fabric taking-up roller 2.

[0006] The damper is an electromagnetic damper or a mechanical friction damper, used to provide tension to the coated nonwoven fabric.

[0007] The motor 13 is a servo motor or a stepper motor to provide a precise and controllable rotational speed.

[0008] The number of guide rollers 14 is at least 4.

[0009] The beneficial effects of this utility model are:

[0010] This invention can achieve stable coating speed for different batches, different manufacturers, and different ambient temperatures, thereby reducing material waste and improving production efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the composition and structure of the coating machine of this utility model.

[0012] Figure 2 This is a schematic diagram of the structure of the nonwoven fabric feeding roller of this utility model.

[0013] Figure 3 This is a schematic diagram of the structure of the nonwoven fabric take-up roller of this utility model. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] like Figure 1-3 As shown.

[0016] A vibration-resistant gas separation membrane coating machine includes a nonwoven fabric feeding roller 1, a nonwoven fabric receiving roller 2, and a scraper roller 3, with multiple ( ) installed between the nonwoven fabric feeding roller 1 and the nonwoven fabric receiving roller 2. Figure 1 There are four guide rollers 14 in total, but more than four can be implemented in practice. A rotary encoder 15 for measuring the nonwoven fabric's travel speed is installed on the guide roller 14 closest to the nonwoven fabric take-up roller 2. A scraper 4 and a liquid plate 5 are installed above the scraper roller 3. The coating liquid 6 falls along the liquid plate 5 onto the nonwoven fabric 7 passing over the scraper roller 3. The nonwoven fabric feed roller 1 includes a through shaft 11 (e.g., ...). Figure 2 The through shaft 11 is equipped with a nonwoven fabric roll 8 and a damper 9. The damper 9 can be an electromagnetic damper or a mechanical friction damper, used to provide tension to the coated nonwoven fabric. The through shaft 11 is supported and fixed to the machine base by rolling bearings 10 at both ends; the nonwoven fabric take-up roller 2 includes a take-up shaft 12 (such as...). Figure 3 The take-up shaft 12 is equipped with a nonwoven fabric roll and a motor 13, and a speed sensor is installed on the motor 13. The motor 13 is a servo motor or a stepper motor to provide a precise and controllable rotation speed. Rolling bearings 10 are also installed at both ends of the take-up shaft 12 and fixed to the machine base.

[0017] Details are as follows:

[0018] 1. The nonwoven fabric roll 8 is installed on the nonwoven fabric feeding roller 1. The nonwoven fabric feeding roller is a through shaft, on which the nonwoven fabric roll and damper are installed. The two ends of the shaft are supported by rolling bearings and fixed to the machine base. The damper is an electromagnetic damper or a mechanical friction damper, which provides a certain tension to the coated nonwoven fabric.

[0019] 2. The nonwoven fabric 7 comes out of the nonwoven fabric feeding roller 1 and passes through four guide rollers 14 to the nonwoven fabric receiving roller 2 in sequence (the number of guide rollers 14 is not limited to 4, but can be more, which serve as guides and supports); the guide rollers 14 are all equipped with bearings and can rotate freely; the scraper roller 3 is a fixed roller and cannot rotate; the last guide roller 14 close to the nonwoven fabric receiving roller 2 is equipped with a rotary encoder to measure its rotational linear speed, i.e., the coating speed.

[0020] 4. The nonwoven fabric take-up roller is a single shaft with a nonwoven fabric roll and a motor mounted on it. Rolling bearings at both ends of the shaft support and fix it to the machine base. The motor is either a servo motor or a stepper motor, providing precise and controllable rotation speed.

[0021] 5. Guide roller 14 (the last guide roller) should be installed as close as possible to the nonwoven fabric take-up roller without affecting operation.

[0022] 6. The entire system has two measurement and control points: the linear velocity V measured by the rotary encoder (in meters per second) and the motor rotational speed N (in revolutions per second), both of which are measured and controlled by the control system.

[0023] 7. Each time the system starts, the required scraping speed is set to V0. The motor initially rotates at a speed of N = 0.1 rpm. At this time, a linear velocity V is measured by the rotary encoder, which is calculated as V = N * D * 3.14 (Formula 1). Since V and N are known, the diameter of the current nonwoven fabric roll, D = V / (N * 3.14) (Formula 2), can be calculated. From the current nonwoven fabric diameter, the required rotational speed N0 = V0 / (D * 3.14) (Formula 3) can be calculated to reach speed V0. After adjusting the motor speed to N0, the set speed V0 is achieved. The above three formulas are iteratively calculated repeatedly within the control system. The calculation can be set to occur every 10ms, 100ms, 1000ms, or any arbitrary interval. At this time, the sampling and calculation are only related to the mechanical transmission structure parameters, eliminating the coupling jitter between the PID algorithm and the nonwoven fabric.

[0024] The parts not covered in this utility model are the same as or can be implemented using existing technologies.

Claims

1. A vibration-resistant gas separation membrane coating machine, comprising a nonwoven fabric feeding roller (1), a nonwoven fabric receiving roller (2), and a scraper roller (3), wherein a scraper (4) and a liquid plate (5) are mounted above the scraper roller (3), and coating liquid (6) falls along the liquid plate (5) onto the nonwoven fabric (7) passing over the scraper roller (3), characterized in that: The nonwoven fabric feeding roller (1) includes a through shaft (11), on which a nonwoven fabric roll (8) and a damper (9) are mounted. The two ends of the through shaft (11) are supported by rolling bearings (10) and fixed on the machine base. The nonwoven fabric taking roller (2) includes a take-up shaft (12), on which a nonwoven fabric roll and a motor (13) are mounted. A speed sensor is mounted on the motor (13). The two ends of the take-up shaft (12) are also mounted with rolling bearings (10) and fixed on the machine base. Multiple guide rollers (14) are installed between the nonwoven fabric feeding roller (1) and the nonwoven fabric taking roller (2). A rotary encoder (15) for measuring the nonwoven fabric travel speed is installed on the guide roller (14) closest to the nonwoven fabric taking roller (2).

2. The anti-vibration gas separation membrane coating machine according to claim 1, characterized in that: The damper is an electromagnetic damper or a mechanical friction damper, used to provide tension to the coated nonwoven fabric.

3. The anti-vibration gas separation membrane coating machine according to claim 1, characterized in that: The motor (13) is a servo motor or a stepper motor to provide a precise and controllable rotational speed.

4. The anti-vibration gas separation membrane coating machine according to claim 1, characterized in that: The number of guide rollers (14) is at least 4.

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