Dynamic brake control system of frame-type stranding machine

Abstract

The invention discloses a dynamic brake control system of a frame-type stranding machine, belongs to the field of frame-type stranding machines, relates to a dynamic brake technology, and aims at solving the problem that in the prior art, in the braking process of the frame-type stranding machine, rough brake action can make a huge tooth shape of a speed curve very obvious. A dead zone interval torque point is set through the brake controller so as to obtain a dead zone interval air pressure standard value, a motor torque value of the frame type stranding machine is obtained through the torque feedback module, a real-time bus voltage value is obtained through the voltage obtaining module, and the brake controller calculates a real-time brake air pressure value. And the brake controller outputs a real-time brake air pressure value to the traveling controller to control the pneumatic proportional valve to carry out air control on the brake air bag, so that one or more groups of brake pads are close to the winch body for braking. According to the dynamic brake system, the parking speed of each stranding body is linearly reliable as much as possible in the parking process while each section of stranding body of the frame-type stranding machine meets the rapid parking requirement, so that the product of the equipment is more intact.

Description

Technical Field

[0001] The present invention belongs to the field of frame stranding machines, relates to dynamic braking technology, and specifically is a dynamic braking control system for a frame stranding machine. Background Art

[0002] The air brake principle is to adjust the valve switch of the control valve. When the valve is opened, the air flow is transported through the air pipe to the brake convex top shafts of the four wheels. The shaft body rotates to push the brake pads with the flange against the brake hub to achieve the braking purpose. The advantages of air braking are rapid response and large braking force. When the frame stranding machine makes a rapid stop, in order to ensure that each stranding body synchronously and rapidly decelerates to 0 speed under control, it is necessary to overcome the reverse electric energy generated during the rapid deceleration of the stranding body. In addition to the braking consumption by the braking unit of the equipment, it is also necessary to assist in consuming the excess reverse electric energy by controlling the magnitude of the pneumatic brake force. To prevent the reverse electric energy from exceeding the working range of the braking unit, causing the frequency converters of each stranding body to alarm, and further causing the uncontrolled deceleration of each stranding body and damage to the product.

[0003] During the entire process of rapid stop, the magnitude of the force of the mechanical brake pads directly determines whether the speed is linear during the deceleration process. A rough braking action will make the sawtooth shape of the speed curve obvious, and thus the product cannot reach the ideal result.

[0004] Therefore, the present invention proposes a dynamic braking control system for a frame stranding machine. Summary of the Invention

[0005] The purpose of this application is to provide a dynamic braking control system for a frame stranding machine, which solves the problem that in the prior art, during the braking process of the frame stranding machine, a rough braking action will make the sawtooth shape of the speed curve obvious, and thus the product cannot reach the ideal result.

[0006] To achieve the above purpose, this application provides a dynamic braking control system for a frame stranding machine, including a traveling controller, a braking controller, a brake air bag, a pneumatic proportional valve, and a stranding body; the traveling controller is used to combine with the braking controller to adjust the real-time braking air pressure value in the brake air bag by using the pneumatic proportional valve to complete the braking control of the stranding body;

[0007] The braking controller is set with a dead zone interval torque point, and the dead zone interval torque point is the motor torque range when power generation is required to obtain the dead zone interval air pressure standard value;

[0008] It further includes a torque feedback module, and the torque feedback module is used to obtain the motor torque value of the frame stranding machine in real time;

[0009] The torque feedback module is connected to the braking controller and is used to output the obtained motor torque value to the braking controller;

[0010] The voltage acquisition module acquires the real-time bus voltage value and feeds it back to the brake controller;

[0011] The brake controller calculates the real-time brake air pressure value. When the real-time brake air pressure value ∈ [operating air pressure output value, dead zone interval air pressure standard value], the brake controller outputs the real-time brake air pressure value to the vehicle controller, controls the pneumatic proportional valve to control the gas in the brake air bag, so that one or more groups of brake pads approach the winch body for braking.

[0012] As a further description of the present invention, the brake controller controls multiple pneumatic proportional valves with multiple control signals. Each pneumatic proportional valve corresponds to one or more groups of brake pads, and each group of brake pads corresponds to one winch body and at least one air pressure sensor.

[0013] As a further description of the present invention, the brake controller sets an operating air pressure output value, and fills the brake air bag with gas in advance through the pneumatic proportional valve, so that one or more groups of brake pads are closer to the winch body.

[0014] As a further description of the present invention, the calculation formula of the real-time brake air pressure value is:

[0015] Motor torque value * Real-time bus voltage value * Correction factor = Real-time brake air pressure value

[0016] Among them, the real-time brake air pressure value has an upper and lower limit range, where the upper limit value is the dead zone interval air pressure standard value, and the lower limit value is the operating air pressure output value.

[0017] As a further description of the present invention, when braking is required, the vehicle controller acquires the real-time brake air pressure value calculated by the brake controller and marks it as the target air pressure value;

[0018] According to the target air pressure value, the vehicle controller sends a requested air pressure value to the brake controller every single braking cycle. The requested air pressure value starts to increase based on the operating air pressure output value with a unit air pressure increase until the target air pressure value.

[0019] As a further description of the present invention, the single braking cycle and the unit air pressure increase are set by the vehicle controller according to the specifications of the brake air bag and the winch body;

[0020] The single braking cycle is 20 ms; the unit air pressure increase is 5 kPa.

[0021] As a further description of the present invention, after the vehicle controller completes the braking, the vehicle controller obtains the operating air pressure output value, and the vehicle controller sends a request air pressure value to the brake controller every single release cycle, wherein the request air pressure value is based on the current air pressure output value and starts to decrease with a unit air pressure increase as the air pressure increment until the operating air pressure output value is reached.

[0022] As a further description of the present invention, the brake controller obtains the real-time air pressure of the brake air bag from the air pressure sensor every first time period, that is, measures the air pressure value; the brake controller sends the measured air pressure value to the driving controller to provide a brake feedback signal, and receives the requested air pressure value from the driving controller;

[0023] As a further description of the present invention, the single release cycle and the first duration are set by the driving controller according to the specifications of the brake air bag and the strand;

[0024] The single braking cycle is 50ms; the unit air pressure increase is 8kpa.

[0025] As a further description of the present invention, the pneumatic proportional valve adjusts the valve opening size of the pneumatic proportional valve according to the control signal so that the measured air pressure value and the requested air pressure value converge.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] When braking, the brake controller is set with an operating air pressure output value, and gas is pre-filled into the brake air bag through the pneumatic proportional valve, so that one or more groups of brake pads are closer to the stranded body. The brake controller also sets the dead zone interval torque point to obtain the dead zone interval air pressure standard value, and obtains the motor torque value of the frame stranding machine through the torque feedback module and the real-time bus voltage value through the voltage acquisition module. The brake controller calculates the real-time brake air pressure value. When the real-time brake air pressure value ∈ [operating air pressure output value, dead zone interval air pressure standard value], the brake controller outputs the real-time brake air pressure value to the driving controller, controls the pneumatic proportional valve to control the brake air bag, and makes one or more groups of brake pads close to the stranded body for braking. This dynamic brake system allows each section of the stranded body of the frame stranding machine to stop quickly while making the parking speed of each strand as linear and reliable as possible during the parking process, thereby making the equipment product more intact. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The present invention is a structural block diagram of a dynamic brake control system of a frame-type stranding machine. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0030] Specifically, please refer to Figure 1 , a dynamic braking control system for a frame type stranding machine, including a traveling controller, a braking controller (i.e., a PLC module), a braking air bag, a pressure sensor, a pneumatic proportional valve, a stranding body, etc. Among them, the braking controller controls multiple pneumatic proportional valves through multiple control signals. Each pneumatic proportional valve corresponds to one or more groups of brake pads. Each group of brake pads corresponds to a stranding body and at least one pressure sensor. The signals of the pressure sensors are gathered at the braking controller to form a control feedback.

[0031] In this application, the traveling controller is used to give a braking control signal to the braking controller;

[0032] Among them, in the initial stage of braking, the air pressure value in the braking air bag is close to zero, that is, there is no gas in the braking air bag and there is no braking force. To ensure the braking force and fast response, a certain amount of gas needs to be filled into the braking air bag to make one or more groups of brake pads closer to the stranding body;

[0033] Therefore, in this application, the braking controller is set with an operating air pressure output value, that is, a part of the gas is filled into the braking air bag in advance through the pneumatic proportional valve to make one or more groups of brake pads closer to the stranding body. When the braking controller receives the braking control signal, it can control the pneumatic proportional valve immediately to make one or more groups of brake pads that are already close to the stranding body brake quickly;

[0034] Specifically, the braking controller is also set with a dead zone interval torque point, and the dead zone interval torque point is the motor torque range when power generation is required; generally, it is shown that if the motor torque when power generation is required is always greater than -20%, the dead zone interval torque point is set to -20%;

[0035] In a specific embodiment, the dead zone interval torque point is used to obtain the dead zone interval air pressure standard value. After the dead zone interval torque point is confirmed, the dead zone interval air pressure standard value can be output. This value is the lowest air pressure value during rapid braking. When rapid parking is desired, the real-time braking air pressure value must be greater than or equal to the dead zone interval air pressure standard value;

[0036] It should be noted that the dynamic braking control system of the frame stranding machine further includes a torque feedback module, and the torque feedback module is used to obtain the motor torque value of the frame stranding machine in real time;

[0037] The torque feedback module is connected to the brake controller and is used to output the obtained motor torque value to the brake controller;

[0038] Obviously, those skilled in the art know that when performing dynamic braking control, it is also necessary to obtain the real-time bus voltage value of the frequency converter, and the real-time bus voltage value also needs to be fed back to the brake controller;

[0039] The real-time bus voltage value is obtained by a voltage acquisition module;

[0040] The brake controller is used to obtain the operating air pressure output value, the dead zone interval torque point, the dead zone interval air pressure standard value, the motor torque value, and the real-time bus voltage value, and processes the obtained data to calculate the real-time braking air pressure value;

[0041] The calculation formula for the real-time braking air pressure value is as follows:

[0042] Motor torque value * Real-time bus voltage value * Correction coefficient = Real-time braking air pressure value

[0043] Among them, the real-time braking air pressure value has an upper and lower limit range, where the upper limit value is the dead zone interval air pressure standard value, and the lower limit value is the operating air pressure output value;

[0044] When the real-time braking air pressure value ∈ [Operating air pressure output value, Dead zone interval air pressure standard value], the brake controller outputs the real-time braking air pressure value to the vehicle controller, controls the pneumatic proportional valve to control the gas in the brake air bag, so that one or more groups of brake pads approach the stranding body for braking, achieving the purpose of accurately controlling the braking process;

[0045] It should also be noted that when braking is required, the vehicle controller obtains the real-time braking air pressure value calculated by the brake controller and marks it as the target air pressure value;

[0046] According to the target air pressure value, the vehicle controller sends a requested air pressure value to the brake controller every single braking cycle. The requested air pressure value starts to increase based on the operating air pressure output value with a unit air pressure increase until the target air pressure value;

[0047] In this application, the single braking cycle and the unit air pressure increase are set by the vehicle controller according to the specifications of the brake air bag and the stranding body. In an embodiment of the present invention, the single braking cycle is generally 20 ms; the unit air pressure increase is generally 5 kPa;

[0048] It should be noted that the target air pressure value, i.e., the real-time brake air pressure value, changes in real time, according to the calculation formula of the real-time brake air pressure value until the braking of the strand is completed;

[0049] Moreover, after the vehicle controller finishes the braking, the vehicle controller obtains the operating air pressure output value, and the vehicle controller sends a request air pressure value to the brake controller every single release cycle, wherein the request air pressure value starts to decrease based on the current air pressure output value with a unit air pressure increase as the air pressure increment until the operating air pressure output value is reached;

[0050] The brake controller obtains the real-time air pressure of the brake air bag from the air pressure sensor at a first time interval, that is, measures the air pressure value; the brake controller sends the measured air pressure value to the driving controller to provide a brake feedback signal, and receives the requested air pressure value from the driving controller; and then uses the PD algorithm to calculate and output a control signal to the pneumatic proportional valve according to the requested air pressure value and the measured air pressure value;

[0051] The single release cycle and the first duration are generally set by the driving controller according to the specifications of the brake air bag and the strand. In one embodiment of the present invention, the single braking cycle is generally 50ms; the unit air pressure increase is generally 8kpa;

[0052] The pneumatic proportional valve adjusts the valve opening size of the pneumatic proportional valve according to the control signal so that the measured air pressure value and the requested air pressure value converge.

[0053] In this way, the pressure value of the air brake can be smoothly controlled during the braking process, making the braking process smoother and faster.

[0054] Working principle of the present invention:

[0055] When braking, the brake controller is set with an operating air pressure output value, and gas is pre-filled into the brake air bag through the pneumatic proportional valve, so that one or more groups of brake pads are closer to the stranded body. The brake controller also sets the dead zone interval torque point to obtain the dead zone interval air pressure standard value, and obtains the motor torque value of the frame stranding machine through the torque feedback module and the real-time bus voltage value through the voltage acquisition module. The brake controller calculates the real-time brake air pressure value. When the real-time brake air pressure value ∈ [operating air pressure output value, dead zone interval air pressure standard value], the brake controller outputs the real-time brake air pressure value to the driving controller, controls the pneumatic proportional valve to control the brake air bag, and makes one or more groups of brake pads close to the stranded body for braking. This dynamic brake system allows each section of the stranded body of the frame stranding machine to stop quickly while making the parking speed of each strand as linear and reliable as possible during the parking process, thereby making the equipment product more intact.

[0056] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dynamic brake control system for a frame-type stranding machine, comprising a driving controller, a brake controller, a brake air bag, a pneumatic proportional valve and a stranding body; the driving controller is used to combine with the brake controller to use the pneumatic proportional valve to adjust the real-time brake air pressure value in the brake air bag to complete the brake control of the stranding body; It is characterized in that The brake controller is set with a dead zone interval torque point, wherein the dead zone interval torque point is the motor torque range when power generation is required to obtain the dead zone interval air pressure standard value; It also includes a torque feedback module, which is used to obtain the motor torque value of the frame-type stranding machine in real time; The torque feedback module is connected to the brake controller and is used to output the acquired motor torque value to the brake controller; The voltage acquisition module obtains the real-time bus voltage value and feeds it back to the brake controller; The brake controller calculates the real-time brake air pressure value. When the real-time brake air pressure value∈[operating air pressure output value, dead zone interval air pressure standard value], the brake controller outputs the real-time brake air pressure value to the driving controller, controls the pneumatic proportional valve to control the brake air bag, so that one or more groups of brake pads are close to the coil for braking.

2. A dynamic brake control system for a frame-type stranding machine as claimed in claim 1, characterized in that: The brake controller controls multiple pneumatic proportional valves with multiple control signals, each pneumatic proportional valve corresponds to one or more groups of brake pads, and each group of brake pads corresponds to a coil and at least one air pressure sensor.

3. A dynamic brake control system for a frame-type stranding machine as claimed in claim 1, characterized in that: The brake controller is set with an operating air pressure output value, and gas is filled into the brake air bag in advance through a pneumatic proportional valve, so that one or more groups of brake pads are closer to the stranded body.

4. A dynamic brake control system for a frame-type stranding machine as claimed in claim 1, characterized in that: The calculation formula of the real-time brake pressure value is: Motor torque value * real-time bus voltage value * correction coefficient = real-time brake pressure value Among them, the real-time brake air pressure value has a range of upper and lower limits, where the upper limit value is the dead zone interval air pressure standard value, and the lower limit value is the operating air pressure output value.

5. A dynamic brake control system for a frame-type stranding machine as claimed in claim 1, characterized in that: When braking is required, the driving controller obtains the real-time brake air pressure value calculated by the brake controller and marks it as the target air pressure value; According to the target air pressure value, the driving controller sends a request air pressure value to the brake controller every single braking cycle, wherein the request air pressure value starts to increase with a unit air pressure increase as the air pressure increment based on the operating air pressure output value until the target air pressure value is reached.

6. A dynamic brake control system for a frame-type stranding machine as claimed in claim 5, characterized in that: The single braking cycle and the unit air pressure increase are set by the driving controller according to the specifications of the brake air bag and the strand; The single braking cycle is 20ms; the unit air pressure increase is 5kpa.

7. A dynamic brake control system for a frame-type stranding machine as claimed in claim 5, characterized in that: After the vehicle controller completes the braking, the vehicle controller obtains the operating air pressure output value, and sends a request air pressure value to the brake controller every single release cycle, wherein the request air pressure value is based on the current air pressure output value and starts to decrease with a unit air pressure increase as the air pressure increment until the operating air pressure output value is reached.

8. A dynamic brake control system for a frame-type stranding machine as claimed in claim 7, characterized in that: The brake controller obtains the real-time air pressure of the brake air bag from the air pressure sensor every first time period, that is, measures the air pressure value; the brake controller sends the measured air pressure value to the driving controller to provide a brake feedback signal, and receives the requested air pressure value from the driving controller.

9. A dynamic brake control system for a frame-type stranding machine as claimed in claim 8, characterized in that: The single release cycle and the first duration are set by the driving controller according to the specifications of the brake air bag and the strand; The single braking cycle is 50ms; the unit air pressure increase is 8kpa.

10. A dynamic brake control system for a frame-type stranding machine as claimed in claim 9, characterized in that: The pneumatic proportional valve adjusts the valve opening size of the pneumatic proportional valve according to the control signal so that the measured air pressure value and the requested air pressure value converge.

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