A braking system for a high speed rotating fiber optic device

Abstract

The application discloses a brake system for high-speed rotating optical fiber equipment, which is characterized by comprising a rotating shaft connected with an optical fiber take-up drum, a brake disc connected with the rotating shaft, a pneumatic quick return brake disc corresponding to the brake disc, and a controller, wherein a gas chamber interface of the pneumatic quick return brake disc is connected with a vacuum generator and a compressed air source through a gas pressure vacuum pipeline, a control electromagnetic valve and a vacuum control valve are arranged on the gas pressure vacuum pipeline, and the controller controls the opening of the control electromagnetic valve and the vacuum control valve through signal receiving, so that the abutment and separation of the brake friction plate of the pneumatic quick return brake disc and the brake disc are controlled. Through the compressed air, the vacuum generator, the brake, the logic control gas circuit and the controller, effective braking and quick return of the optical fiber take-up drum rotating system are realized.

Description

Technical Field

[0001] This application relates to the field of optical fiber manufacturing, and more specifically, to a braking system for high-speed rotating optical fiber equipment. Background Technology

[0002] With the increasing demand for optical fiber, major optical fiber manufacturers are gradually increasing their fiber drawing speeds, which in turn raises the requirements for equipment. This necessitates the design of more efficient optical fiber processing equipment. In optical fiber processing equipment, the rotation direction of the fiber take-up cassette and the fiber winding direction can be either the same or opposite. During continuous high-speed production on optical fiber production lines, the fiber linear speed can reach 3000–3500 m / min. This results in a very high rotation speed for the fiber take-up cassette. The fiber take-up cassette needs to be able to start quickly to achieve the required speed while also stopping quickly to prevent violent collisions between the fiber surface and the fiber end, which could cause the fiber on the take-up cassette surface to break and become unusable.

[0003] Servo motors are generally used to provide rotational power in process equipment. With a fixed motor capacity, the moment of inertia of the fiber optic take-up hopper will be relatively large after it is full of fiber. Since the linear speed of the fiber optic take-up hopper is generally 3000-3500 r / min, a high-power brake is needed to stop the high-speed rotating fiber optic take-up hopper with a large moment of inertia quickly. More importantly, the precision and cleanliness requirements of fiber optic production process control are high. After the brake of the fiber optic equipment completes its braking function, the brake friction pad and brake disc need to be able to separate quickly and completely to avoid putting additional load on the motor and generating too much brake pad dust.

[0004] Conventional brakes typically use fluid to drive a piston, which pushes brake pads against a brake disc to complete braking. Then, the mechanical return mechanism generates a reaction force that pushes the piston in the opposite direction, separating the brake pads from the disc. This type of brake has limitations. During braking, the return force generated by the return mechanism is opposite to the braking force pushing the piston; this force performs negative work each time braking, affecting the brake's braking power. To achieve greater braking power, conventional brakes can increase fluid pressure or brake disc size. However, installing a pneumatic booster complicates the air circuit structure, and increased pipeline pressure introduces instability. Increasing brake size can also increase braking power, but it results in a bulky structure, which is unsuitable for the operational requirements of fiber optic manufacturing equipment. Furthermore, the mechanical return mechanism of conventional brakes requires good lubrication; otherwise, friction and self-locking of the brake piston will cause the mechanical return function to fail. Fiber optic equipment also has high cleanliness requirements, and lubricating grease is not conducive to maintaining the required cleanliness in the workshop. Therefore, it is necessary to design a braking system that uses compressed air as power, has good braking effect, and provides thorough and reliable return to position for application in optical fiber manufacturing equipment. Summary of the Invention

[0005] The purpose of this application is to provide a braking system for high-speed rotating fiber optic equipment that has good braking effect and reliable return to position.

[0006] This application is implemented as follows:

[0007] This application provides a braking system for high-speed rotating optical fiber equipment, characterized in that it includes a rotating shaft connected to an optical fiber take-up drum, a brake disc connected to the rotating shaft, a pneumatic quick-return brake corresponding to the brake disc, and a controller. The air chamber interface of the pneumatic quick-return brake is connected to a vacuum generator and a compressed air source through a pneumatic vacuum pipeline. A control solenoid valve and a vacuum control valve are provided on the pneumatic vacuum pipeline. The controller controls the opening of the control solenoid valve and the vacuum control valve by receiving signals, thereby controlling the contact and separation of the brake friction pads of the pneumatic quick-return brake with the brake disc.

[0008] According to the above technical solution, the pneumatic quick return brake includes a brake housing, and brake air chambers are symmetrically arranged on both sides of the brake disc on the brake housing. A brake piston is sealed in each brake air chamber, and the outer side of the brake piston is connected to the brake friction pad.

[0009] According to the above technical solution, the outer periphery of the brake piston is dynamically sealed to the brake chamber 5 by a sealing ring.

[0010] According to the above technical solution, a quick-connect fitting for the air pipe connected to the pneumatic vacuum line is provided on the brake housing.

[0011] According to the above technical solution, it also includes a motor rotary encoder, a first sensor for detecting brake signals, and a second sensor for detecting brake chamber vacuum signals. The motor rotary encoder, the first sensor, and the second sensor are respectively connected to the controller.

[0012] According to the above technical solution, the control solenoid valve is a two-position three-way solenoid valve, and the vacuum solenoid valve is a two-position two-way solenoid valve.

[0013] According to the above technical solution, the compressed air source is connected to the vacuum control valve and the control solenoid valve respectively.

[0014] The beneficial effects of these 5 applications are:

[0015] 1. This invention achieves effective braking and rapid return of the optical fiber take-up drum rotation system through compressed air, a vacuum generator, a brake, a logic control air circuit, and a controller. It has the advantages of simple structure, good braking effect, and thorough and reliable return.

[0016] 2. This invention utilizes compressed air braking. Throughout the brake return process, the return pressure generated by the high atmospheric pressure acting on the brake friction pads is constant and evenly distributed, ensuring good centering relative to the piston. Therefore, the atmospheric pressure on the brake piston does not generate a large eccentric torque, thus preventing the eccentric torque caused by the return force from locking the brake piston and causing piston return jamming. During reset, a vacuum is achieved in the brake chamber using a vacuum tube based on the Venturi principle. This ensures that the brake pads are always fully retracted during operation, completing the vacuum return of the brake pads and preventing friction between the friction pads and the brake disc, thus avoiding additional load on the motor. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of a braking system for a high-speed rotating optical fiber device provided in an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the structure of the pneumatic quick-return brake provided in the embodiments of this application;

[0020] Figure 3 This is a schematic diagram of the brake braking state provided in an embodiment of this application.

[0021] Figure 4 This is a schematic diagram of the brake in a vacuum return state provided in an embodiment of this application.

[0022] Figure 5 The schematic diagram of the gas path logic control provided in the embodiments of this application. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] The features and performance of the braking system for high-speed rotating optical fiber equipment of this application are further described in detail below with reference to embodiments.

[0031] like Figure 1 As shown, this embodiment provides a braking system for high-speed rotating optical fiber equipment, including a rotating shaft connected to the optical fiber take-up drum, a brake disc 6 connected to the rotating shaft, a pneumatic quick-return brake 5 corresponding to the brake disc, a controller, a motor rotary encoder 1, a brake signal sensor for detecting the brake signal, and a vacuum sensor for detecting the vacuum signal in the brake chamber. The air chamber interface of the pneumatic quick-return brake is connected to a vacuum generator 4 and a compressed air source via a pneumatic vacuum pipeline 2. A control solenoid valve 3 and a vacuum control valve 15 are provided on the pneumatic vacuum pipeline. The compressed air source is connected to the vacuum control valve and the control solenoid valve, respectively. The motor rotary encoder, the first sensor, and the second sensor are connected to the controller, respectively, for transmitting motor encoder signals, brake signals, and brake chamber vacuum signals. The controller controls the opening of the control solenoid valve and the vacuum control valve by receiving the above signals, thereby controlling the contact and separation of the brake friction pads of the pneumatic quick-return brake with the brake disc.

[0032] like Figure 2As shown, in this embodiment, the pneumatic quick-return brake includes a brake housing. Brake air chambers 10 are symmetrically arranged on both sides of the brake disc on the brake housing. The two brake air chambers are separated by a brake partition, but are interconnected. A brake piston 14 is provided in each brake air chamber. The outer periphery of the brake piston 14 is dynamically sealed to the brake air chamber 10 by a sealing ring 12. The outer side of the brake piston 14 is connected to the brake friction pad 11. The brake piston 14 can slide up and down within the brake air chamber under air pressure. When braking is required, according to... Figure 2 As shown, compressed air enters the brake chambers 10 on both sides via quick connector 8, thereby pushing the brake pistons 14 on both sides. This causes the brake friction pads 11 on both sides to move towards the brake disc, clamping the brake disc 6 and achieving braking of the brake disc 6. When the compressed air pushes the brake piston 14, apart from the small frictional force between the brake piston 14 and the sealing ring 12, there is no mechanical brake return mechanism during braking. Therefore, there is no mechanical reaction force to suppress the air pressure of the piston. The pressure applied to the brake disc is very close to the pressure generated by the brake air pressure on the brake piston 14, resulting in better braking performance than a brake of the same size with a mechanical return mechanism. Its braking state diagram is shown below. Figure 3 As shown.

[0033] After braking is complete, the system detects that the fiber optic take-up drum 7 has stopped via sensors. Due to the Venturi principle, a vacuum can be created using compressed air. The system controls the air valve via a signal to allow compressed air to enter the vacuum generator. This vacuum generator produces a vacuum path, which connects to the brake's air port A. Simultaneously, the air port B is blocked via the air path control valve. Under the vacuum, the normal-pressure air in the brake chamber is completely expelled, creating a negative pressure state relative to the atmosphere. Under the influence of atmospheric pressure, the brake friction pads are pushed by the atmospheric pressure, causing the brake piston to move... Figure 4 The brake pads move in the direction shown until they are pushed back to their limit position, at which point they are completely separated from the brake disc. Throughout the brake return process, the return pressure is entirely generated by atmospheric pressure acting on the brake pads. Therefore, the return pressure is constant in magnitude and evenly distributed, and its centering relative to the piston is good. Consequently, the atmospheric pressure on the brake piston does not generate a large eccentric torque, thus preventing the eccentric torque generated by the return force from causing the brake piston to self-lock and resulting in piston return sticking.

[0034] This invention incorporates a vacuum generator based on the Venturi principle into the air circuit, enabling rapid return of the braking chamber 5 after braking without requiring additional external equipment. In this embodiment, the control solenoid valve is a two-position three-way solenoid valve, and the vacuum solenoid valve is a two-position two-way solenoid valve. In this embodiment, the compressed air source is provided by an air pump.

[0035] pass Figure 5 The control logic brakes the fiber optic take-up drum, and then the logic determines the brake to return to its original position quickly. Specifically, when the fiber optic take-up drum 7 rotates rapidly, the encoder 1 connected to the motor also rotates rapidly. At this time, the controller 15 receives the signal transmitted from it, and therefore, the controller output port 1 outputs a low-level signal, de-energizing the control solenoid valve 3. Figure 5 When the control solenoid valve is de-energized, the compressed air source 18 supplying the pneumatic quick-return brake 5 is closed. When the controller 15 receives a brake signal, its output port 1 outputs a high level signal, which is transmitted to the control solenoid valve 3 via electrical components. At this time, the control solenoid valve 3 is connected to the compressed air source 18, and compressed air enters the pneumatic quick-return brake 5, putting the brake 5 into a braking state, thus braking the fiber optic take-up drum. When the fiber optic take-up drum's speed drops to zero and stops rotating, the motor rotary encoder 1 stops rotating. The controller receives a signal from the motor encoder and, through logical judgment, records the stopping state of the fiber optic take-up drum 7. Simultaneously, the controller outputs a low level signal through its output port 1, de-energizing the control solenoid valve 3 and disconnecting the air source from the control solenoid valve 3. This releases the braking state, but a certain amount of compressed air remains in the brake chamber. At this time, the brake chamber vacuum sensor detects that the air pressure value is higher than the set vacuum value.

[0036] Since the working state of the pneumatic quick-return brake after braking has been described in detail above, in order to achieve the corresponding return effect, the brake must be reset to avoid friction with the brake disc and additional load on the motor. The controller 15 receives the vacuum signal from the brake chamber, and based on the logic judgment of the stop state of the fiber optic take-up drum 7, output port 2 will output a high level, while output port 1 will maintain its original low level. This signal, after electrical conversion, is sent to the vacuum control valve 16, de-energizing the control solenoid valve 3 and energizing the vacuum control valve 16. The air source is connected to the vacuum generator 4 through the two-position two-way vacuum control valve 16, and compressed air flows into the vacuum generator, creating a vacuum. Because the passage of the control solenoid valve 3 is connected to the vacuum port of the vacuum generator 4, the air originally trapped in the brake chamber is quickly discharged through the one-way valve 17 into the atmosphere, allowing the brake chamber to quickly reach a vacuum state. Under the action of external atmospheric pressure, the brake pads of the brake will be automatically compressed to the return state. (Refer to...) Figure 4 When the vacuum sensor in brake chamber 5 detects that the vacuum level in the brake chamber has reached the set value, controller 15 receives the vacuum level signal from the brake chamber, causing output port 2 to output a low level, and vacuum control valve 16 is de-energized. Figure 5 (As shown in the state of vacuum control valve 16), the vacuum generator 4 will stop pumping vacuum, and both the control solenoid valve 3 and vacuum control valve 16 will be de-energized. With the controller output unchanged, the brake chamber 5 can be stably maintained in a vacuum state under the combined action of the check valve 17 and the control solenoid valve 3. Therefore, the brake pads are always in the fully retracted position during operation, which completes the vacuum return of the brake pads. It returns to the initial state before braking, thus allowing the next working cycle to begin.

[0037] The embodiments described above are some, but not all, of the embodiments of this application. The detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

Claims

1. A braking system for high-speed rotating optical fiber equipment, characterized in that: The device includes a rotating shaft connected to the fiber optic take-up drum, a brake disc connected to the rotating shaft, a pneumatic quick-return brake corresponding to the brake disc, and a controller. The air chamber interface of the pneumatic quick-return brake is connected to a vacuum generator and a compressed air source through a pneumatic vacuum pipeline. A control solenoid valve and a vacuum control valve are provided on the pneumatic vacuum pipeline. The controller controls the opening of the control solenoid valve and the vacuum control valve by receiving signals, thereby controlling the contact and separation of the brake friction pads of the pneumatic quick-return brake with the brake disc. The pneumatic quick-return brake includes a brake housing. Brake air chambers are symmetrically arranged on both sides of the brake disc on the brake housing. A brake piston is sealed in each brake air chamber. The outer side of the brake piston is connected to the brake friction pads. The compressed air source is connected to the vacuum control valve and the control solenoid valve respectively.

2. The braking system for high-speed rotating optical fiber equipment according to claim 1, characterized in that: The outer periphery of the brake piston is dynamically sealed to the brake chamber via a sealing ring.

3. The braking system for high-speed rotating optical fiber equipment according to claim 1, characterized in that: The brake housing is equipped with a quick-connect fitting for the pneumatic vacuum line.

4. The braking system for high-speed rotating optical fiber equipment according to claim 1, characterized in that: It also includes a motor rotary encoder, a brake sensor for detecting brake signals, and a second sensor for detecting vacuum signals in the brake chamber. The motor rotary encoder, the first sensor, and the second sensor are respectively connected to the controller.

5. The braking system for high-speed rotating optical fiber equipment according to claim 1, characterized in that: The control solenoid valve is a two-position three-way solenoid valve, and the vacuum solenoid valve is a two-position two-way solenoid valve.

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