Dual-drive synchronous belt transmission system

Abstract

A dual-drive synchronous belt transmission system comprises two driving motors, two clutches, a driving wheel, a synchronous belt and a driven wheel, the driving wheel is installed on a driving shaft, the two ends of the driving shaft are connected with the driving motors through the clutches respectively, and the driving motors and the clutches on the two sides of the driving wheel are electrically connected with a controller. And the synchronous belt is connected between the driving wheel and the driven wheel. The controller monitors the rotating speed, the current, the temperature and other parameters of the first driving motor or the second driving motor in real time, an instruction is immediately sent out once it is detected that a certain motor is abnormal, the clutch corresponding to the fault motor is separated, and the other motor and the clutch of the other motor are started at the same time. The problem that a traditional single-motor transmission system is low in reliability is effectively solved, the operation stability and continuity of equipment are improved, it is guaranteed that when one motor is damaged, the other motor can replace driving in time, and continuous operation of the equipment is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of synchronous belt transmission system for mechanical transmission, belong to synchronous belt transmission technical field. BACKGROUND

[0002] In many industrial production and mechanical equipment operation processes, the reliability of transmission system is crucial. Once the motor of the conventional single-motor driven transmission system fails, the entire device will often be in a shutdown state, which not only causes production interruption, but also can cause huge economic losses. For example, in some automated production lines, large-scale machining equipment and work scenes with high continuity requirements, downtime maintenance not only needs to consume a lot of manpower, material resources and time cost, but also can affect product quality and delivery cycle.

[0003] Therefore, a more reliable transmission system is needed to solve the problem caused by single motor failure. SUMMARY

[0004] The utility model provides a double-drive synchronous belt transmission system for effectively improving transmission reliability and stability and ensuring continuous operation of equipment in view of the deficiencies of single motor driving in existing mechanical transmission.

[0005] The double-drive synchronous belt transmission system of the utility model adopts the following technical solutions.

[0006] The transmission system comprises two drive motors, two sets of clutches, a driving wheel, a synchronous belt and a driven wheel. The driving wheel is installed on a driving shaft, and the two ends of the driving shaft are connected to a drive motor through a set of clutch respectively. The drive motor and the clutch on both sides of the driving wheel are electrically connected to a controller. The synchronous belt is connected between the driving wheel and the driven wheel.

[0007] The drive motor is a variable frequency motor, which is connected to a frequency converter through a power cable, an encoder cable and a temperature cable respectively. The frequency converter is a prior art.

[0008] The clutch is provided with a solenoid valve.

[0009] The controller uses a central processing unit (CPU). The frequency converter of the drive motor and the solenoid valve of the clutch are connected to the central processing unit. The central processing unit controls the solenoid valve of the clutch, selects an effective motor, and then sends a control instruction (running speed and target position) to the frequency converter through a Profinet network. The frequency converter controls the drive motor to operate after receiving the control instruction. The frequency converter obtains the control state of the drive motor through the encoder cable and feeds back the information to the central processing unit, realizing closed-loop control.

[0010] The controller monitors the rotating speed, current, temperature and other parameters of the first driving motor or the second driving motor in real time, and once detects an abnormal condition of a certain motor, such as overload, overheating, short circuit or rotating speed abnormality, immediately issues an instruction to make the clutch corresponding to the fault motor separate, and simultaneously starts the other motor and its clutch, so as to realize the quick switching of the driving motor and ensure the continuous operation of the entire transmission system. The controller can also intelligently control the working state of the two motors according to the working requirements and operation mode of the equipment, for example, in a low-load working condition, only one motor can be started to reduce energy consumption; in a high-load or extremely high-reliability condition, both driving motors can be started at the same time and the load can be reasonably distributed to improve the overall performance and stability of the system.

[0011] The double-drive synchronous belt transmission system of the utility model through the design of double motor one spare one and the ingenious connection of clutch and driving wheel, combined with the controller, effectively solve the problem of low reliability of traditional single motor transmission system, improve the operation stability and continuity of the equipment, ensure that the other motor can timely replace the drive when one motor is damaged, guarantee the continuous operation of the equipment, have wide application prospect and remarkable economic benefit. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is the structural schematic diagram of the double-drive synchronous belt transmission system of the utility model.

[0013] Figure 2 is the control principle schematic diagram of the double-drive synchronous belt transmission system of the utility model.

[0014] In the drawing: 1. first driving motor, 2. second driving motor, 3. first clutch, 4. second clutch, 5. driving wheel, 6. synchronous belt, 7. driven wheel, 8. first frequency converter, 9. central processing unit, 10. first electromagnetic valve, 11. power cable, 12. encoder cable, 13. temperature cable, 14. second frequency converter, 15. second electromagnetic valve. DETAILED DESCRIPTION

[0015] As Figure 1 shown, the double-drive synchronous belt transmission system of the utility model comprises two driving motors, two sets of clutches, a driving wheel 5, a synchronous belt 6 and a driven wheel 7. The driving wheel 5 is installed on a driving shaft, the two ends of the driving shaft are connected with a driving motor through a set of clutch respectively, and the synchronous belt 6 is connected between the driving wheel 5 and the driven wheel 7.

[0016] The two driving motors are marked as a first driving motor 1 and a second driving motor 2 respectively, both of which are variable frequency motors, and the rotating speed thereof is controlled through a frequency converter. Referring to Figure 2, the first driving motor 1 is connected with the first frequency converter 8, and the second driving motor 2 is connected with the second frequency converter 14, and the frequency conversion motor is connected with the frequency converter through the power cable 11, the encoder cable 12 and the temperature cable 13 respectively, and the frequency converter is prior art. The first driving motor 1 and the second driving motor 2 have the same or similar performance parameters, including rated power, speed range, torque output and the like, so as to ensure smooth transition when switching driving.

[0017] Each driving motor is connected with a set of clutch between the driving shaft on which the driving wheel 5 is installed. The two sets of clutches are respectively the first clutch 3 and the second clutch 4. The type of clutch can be selected from electromagnetic clutch, friction clutch or other suitable structure of clutch, and the clutch state is controlled by electromagnetic valve. See Figure 2 , the first clutch 3 is controlled by the first electromagnetic valve 10, and the second clutch 4 is controlled by the second electromagnetic valve 15. The main function of the clutch is to realize the connection and disconnection of power between the driving motor and the driving wheel 5. When the driving motor works normally, the clutch is in the engaged state, and the power of the driving motor is effectively transmitted to the driving wheel 5. When one driving motor fails or needs to switch the driving motor, the clutch can quickly separate, cutting off the power transmission between the fault motor and the driving wheel 5, so as to avoid adverse effects on the system.

[0018] The driving wheel 5 is the power input end in the synchronous belt transmission system, which receives the power transmitted by the driving motor after being connected with the clutch, and transmits the power to the driven wheel 7 through the meshing with the synchronous belt 6. The design of the driving wheel 5 needs to consider the matching with the synchronous belt 6, including the tooth shape, tooth number, pitch diameter and the like, so as to ensure that the synchronous belt can stably and efficiently transmit power, and has good transmission accuracy and low noise level.

[0019] The synchronous belt 6 is made of high-strength, wear-resistant and elastic material, such as polyurethane rubber synchronous belt or rubber and steel wire rope composite synchronous belt. The tooth shape of the synchronous belt 6 matches the tooth shape of the driving wheel 5 and the driven wheel 7, and the precise power transmission is realized through the meshing between the teeth, avoiding the phenomenon of slipping and ensuring the accuracy of the transmission ratio. The length and width of the synchronous belt 6 are determined according to the center distance of the transmission system, the transmission power and the required transmission accuracy and the like, and under the premise of meeting the strength requirement, appropriate size is selected as far as possible to reduce the cost and the volume of the system. According to the actual application scene, the load can be connected to the synchronous belt 6, and the synchronous belt 6 drives the load to move, such as horizontal movement and lifting movement.

[0020] The driven wheel 7 is connected with the driving wheel 5 through the synchronous belt 6, which mainly transmits the power from the driving wheel to the load equipment or other transmission components. The parameters of the driven wheel are designed to cooperate with the driving wheel to achieve the expected transmission ratio and rotational speed output. The shaft of the driven wheel can be connected to various loads according to the actual application scene, such as working machinery, conveying devices, stirring equipment, etc.

[0021] The driving motors and clutches on both sides of the driving wheel 5 are controlled by the controller, which can realize separate starting, stopping, speed regulation and other operations. In normal operation, it can flexibly switch or run simultaneously according to the working load and running state of the equipment to optimize energy utilization efficiency. As shown in Figure 2 The controller uses a central processing unit 9. The first frequency converter 8 controlling the first driving motor 1, the first electromagnetic valve 8 controlling the first clutch 3, the second frequency converter 14 controlling the second driving motor 2, and the second electromagnetic valve 15 controlling the second clutch 4 are all connected with the central processing unit 9. The first frequency converter 8 and the second frequency converter 14 are connected with the central processing unit 9 through the network interface for Profinet communication.

[0022] The central processing unit 9 controls the electromagnetic valves, selects the effective motor, and then sends control instructions (running speed and target position) to the frequency converter through the Profinet network. After receiving the control instructions, the frequency converter controls the driving motor to run. The frequency converter obtains the driving motor control state through the encoder cable 12 and feeds back the information to the central processing unit, realizing closed-loop control.

[0023] The controller (central processing unit 9) is the core part of the entire double-drive synchronous belt transmission system, which is responsible for the coordinated control of the first driving motor 1 and the second driving motor 2 as well as the first clutch 3 and the second clutch 4. The controller has motor running state monitoring function, which can monitor the speed, current, temperature and other parameters of the first driving motor 1 and the second driving motor 2 in real time. Once an abnormal situation is detected in a motor, such as overload, overheating, short circuit or abnormal speed, the controller will immediately issue an instruction to disconnect the clutch corresponding to the faulty motor and simultaneously start the standby motor and its clutch, realizing the rapid switching of the driving motor and ensuring the continuous operation of the entire transmission system.

[0024] In addition, the controller can intelligently regulate and control the working state of the two driving motors according to the working requirements and running mode of the equipment. For example, in low load working conditions, only one motor can be started to reduce energy consumption; in high load or extremely high reliability requirements, both motors can be started and the load can be reasonably distributed to improve the overall performance and stability of the system.

[0025] The specific implementation process of the above-mentioned double-drive synchronous belt transmission system is as follows.

[0026] 1. System installation and commissioning

[0027] (1) According to the layout and design requirements of the device, the first drive motor 1, the second drive motor 2, the first clutch 3, the second clutch 4, the driving wheel 5, the synchronous belt 6 and the driven wheel 7 are installed and connected, ensuring that each component is firmly installed and reliably connected, and the tension of the synchronous belt is moderate.

[0028] (2) Connect the electrical circuit between the central processor 9 and the motor, clutch, set the parameters of the central processor 9 and initialize the debugging, including the start, stop, speed control logic of the motor, the engagement and separation control signal of the clutch, and the fault detection and alarm threshold setting, etc.

[0029] 2. Normal operation mode

[0030] (1) At the initial stage of device startup, the central processor 9 first performs self-checking on the first drive motor 1 and the second drive motor 2, and confirms that both motors are in normal state, then starts one of them according to the preset operation strategy, for example, starts the first drive motor 1, at the same time the first clutch 3 is engaged, the power of the first drive motor 1 is transmitted to the driving wheel 5 through the first clutch 1, the driving wheel 5 drives the synchronous belt 6 to rotate, and then drives the driven wheel 7 and the load device to start running.

[0031] (2) During the operation of the device, the central processor 9 monitors the operating parameters of the first drive motor 1 in real time, such as current, speed, temperature, etc. If the load of the device increases, when the load of the first drive motor 1 exceeds a certain percentage (such as 80%) of its rated load, the central processor 9 can determine whether the second drive motor 2 needs to be started for auxiliary driving according to the preset algorithm. If needed, start the second drive motor 2, and gradually engage the second clutch 4 to introduce the power of the second drive motor 2 into the system, and reasonably distribute the load of the two motors, so that they jointly bear the running load of the device, to improve the power output and stability of the system.

[0032] 3. Fault switching mode

[0033] (1) When the central processor 9 detects a fault in the first drive motor 1, for example, the current of the first drive motor 1 suddenly increases beyond the set overload protection threshold, or the speed of the first drive motor 1 drops sharply or stops rotating, the central processor 9 will immediately issue an instruction to disconnect the first clutch 3 to cut off the power transmission between the first drive motor 1 and the driving wheel 5, to prevent the fault from further expanding.

[0034] (2) Then, the central processor 9 starts the second driving motor 2 and engages the second clutch 4, and the second driving motor 2 starts to drive the driving wheel 5 and the synchronous belt 6, so that the driven wheel 7 and the load device continue to run. During the switching process, the central processor 9 optimizes and adjusts the starting parameters of the second driving motor 2 according to the characteristics of the second driving motor 2 and the running state of the device, so as to ensure that it can smoothly take over the work of the first driving motor 1, minimize the impact on the running of the device, and realize seamless switching.

[0035] 4. Maintenance and repair

[0036] When the device is in a shutdown state or during the operation of the standby motor, the faulty motor can be maintained and repaired. Maintenance personnel can conduct a comprehensive inspection of the motor based on the fault information recorded by the central processor 9, including insulation resistance testing of the motor winding, inspection and replacement of the bearing, and inspection of the wear condition of the brush, to determine the cause of the fault and repair it. The repaired motor needs to undergo strict testing and debugging to ensure that its performance returns to normal before it can be put back into use as a standby motor.

Claims

1. A dual-drive synchronous belt drive system, characterized in that, It includes two drive motors, two sets of clutches, a drive pulley, a timing belt, and a driven pulley. The drive pulley is mounted on the drive shaft, and each end of the drive shaft is connected to a drive motor through a clutch. The drive motors and clutches on both sides of the drive pulley are electrically connected to the controller. The timing belt is connected between the drive pulley and the driven pulley.

2. The dual-drive synchronous belt drive system according to claim 1, characterized in that, The drive motor is a variable frequency motor, which is connected to the frequency converter through a power cable, an encoder cable and a temperature cable.

3. The dual-drive synchronous belt drive system according to claim 1, characterized in that, The clutch is equipped with a solenoid valve.

4. The dual-drive synchronous belt drive system according to claim 1, characterized in that, The controller uses a central processing unit, and the frequency converter that controls the drive motor and the solenoid valve that controls the clutch are both connected to the central processing unit.

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