Water propeller test bench for special vehicle

Abstract

The utility model discloses a test bed for a water propeller of a special vehicle. The test bed comprises a mechanical part and an electrical part, the mechanical part consists of a base assembly, a fixed seat, a motor support, a flange plate and a transmission shaft; the electrical part comprises an electric control cabinet, a motor, a frequency converter, a Kunlun Tontai touch screen, an RS485 communication module and a related sensor module; through the combination of a touch screen and an RS485 bus, digital display and accurate control of parameters such as the rotating speed and the working current of the motor are realized, and the state of a circuit is monitored in real time. The device can simulate the actual working condition, rapidly and accurately evaluate the performance of the water propeller, is suitable for special vehicle maintenance enterprises, and is convenient to operate and high in reliability.

Description

Technical Field

[0001] This utility model relates to the technical field of performance testing of special vehicle equipment, and in particular to a test bench for water propulsion of special vehicles. Background Technology

[0002] As a core component of special vehicles, the water propulsion system plays a crucial role in wading operations. However, with the increasing frequency of use and the challenges of complex operating conditions for special vehicles, the need for performance testing and maintenance of water propulsion systems is becoming increasingly prominent. Traditional testing methods typically rely on manual operation or simple mechanical testing, which are not only inefficient but also difficult to accurately monitor and evaluate the propulsion system's operating status. Furthermore, existing technology lacks a testing facility capable of simulating actual operating conditions and conducting comprehensive performance tests on the propulsion system, making it impossible to accurately determine the type of fault and the degree of performance degradation during maintenance.

[0003] In terms of electrical control, traditional testing equipment mostly uses analog signal control, which suffers from weak anti-interference capabilities and low data transmission accuracy, making it difficult to meet the demands of modern digital and intelligent testing. Furthermore, the control circuit design in existing technologies is complex, lacking modular and integrated solutions, resulting in high maintenance costs and inconvenient operation. Therefore, developing a test bench capable of comprehensively testing the performance of water propellers through digital control has become an urgent technical challenge. This test bench needs to have real-time monitoring and display capabilities for key parameters such as motor speed and operating current, and should be able to achieve convenient operation and control through a human-machine interface, thereby improving testing efficiency and accuracy and providing reliable technical support for the maintenance and repair of special vehicles. Utility Model Content

[0004] The purpose of this invention is to provide a test bench for water propulsion of special vehicles to overcome the shortcomings of the existing technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A test bench for water propulsion systems of special vehicles includes mechanical and electrical components. Among them:

[0007] The mechanical components mainly consist of a base assembly, a mounting base, a motor support, a flange, and a drive shaft. The base assembly, serving as the fundamental support component of the entire test bench, is designed with structural rigidity and stability in mind to withstand vibrations and loads generated during testing. The mounting base, located on one side of the base assembly, is made of high-strength material and is fixedly connected to the base assembly via bolts or welding, used to mount the water propeller under test. The motor support, located on the other side of the base assembly, is designed to fully consider the motor's weight distribution and vibration characteristics during operation, minimizing the impact of vibration on the test results. The flange and drive shaft are designed to ensure a high-precision fit, avoiding test errors caused by loosening or energy loss. The flange is rigidly connected to the motor output end via fasteners, and the drive shaft transmits the power output from the motor to the water propeller under test.

[0008] Furthermore, the electrical components include an electrical control cabinet, a motor, a frequency converter, a Kunlun Tongtai touchscreen, an RS485 communication module, and related sensor modules. The electrical control cabinet integrates electrical components such as frequency converters, pneumatic solenoid directional valves, circuit breakers, and relays, and communication between modules is achieved via an RS485 bus. The touchscreen acts as the master station, interacting with multiple slave modules (such as frequency converters, digital input / output modules, and analog input modules) via the RS485 bus. The master station touchscreen sends data frame commands to the bus, and each slave station identifies and executes the corresponding operation based on its address. For example, when the master station sends a data frame to start a three-phase motor, the frequency converter recognizes it, executes the start operation, and drives the motor at the set frequency; when the master station needs to read relevant parameters of the frequency converter (such as the operating current value), the slave frequency converter returns the corresponding data frame, and the master station displays the data on the screen.

[0009] Specifically, the electrical components employ a modular design for easy system expansion and maintenance. The RS485 digital input module, RS485 digital output module, and RS485 analog input module are used to acquire external signals, control external devices, and monitor analog parameters, respectively. Analog speed-to-current and current-to-current modules are used for signal conversion to ensure compatibility between different signal types. All modules are powered by 24VDC and communicate via an RS485 bus to improve the system's anti-interference capability and reliability. An RS232-to-RS485 converter module is used to expand the communication interface, meeting the needs of simultaneous access for multiple modules.

[0010] Furthermore, the control logic and functions of the test bench are implemented as follows:

[0011] S1: The touchscreen displays parameters such as motor speed and operating current in real time, facilitating operator monitoring of the testing process. As a human-machine interface, the touchscreen allows operators to set motor speed, forward / reverse rotation, and start / stop commands.

[0012] S2: The frequency converter receives touch screen commands via the bus to precisely adjust the motor speed. The frequency converter adjusts the output frequency according to the received commands, thereby changing the motor speed and supporting forward, reverse, and stop operations.

[0013] S3: The system monitors the voltage and current status of the control circuit in real time to promptly detect abnormalities. Voltage and current signals are acquired via an RS485 analog input module and transmitted to a touchscreen display so that operators can assess the circuit's operating status.

[0014] S4: Through preset programs, the test bench can automatically complete the performance test of the water propulsion system. The touchscreen stores various test programs, allowing operators to select the appropriate program based on actual needs. The test bench then automatically executes the test tasks according to the preset steps, reducing manual intervention and improving testing efficiency.

[0015] Furthermore, the beneficial effects of the aforementioned test bench are as follows:

[0016] By combining a touchscreen with an RS485 bus, the system enables digital display and control of parameters such as motor speed and operating current, offering convenient and intuitive operation. The frequency converter, controlled via the bus, precisely adjusts the motor speed to meet testing requirements under various operating conditions. The system can monitor circuit voltage, current, and motor operating status in real time, promptly detecting abnormalities and ensuring test safety. The modular design facilitates system expansion and maintenance, enhancing the flexibility and reliability of the test bench.

[0017] Specifically, the test bench is primarily used in maintenance companies specializing in the overhaul and intermediate repair of special vehicles. It is suitable for performance testing and fault diagnosis of the water propulsion systems of special vehicles. By simulating actual working conditions, the test bench can quickly and accurately assess the operational status of the water propulsion system, providing a scientific basis for maintenance decisions.

[0018] In summary, this utility model, through a combination of reasonable mechanical structure design and advanced electrical control technology, achieves efficient testing and evaluation of the performance of special vehicle water propulsion devices, and has significant engineering application value.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] By combining a touchscreen with an RS485 bus, the system enables digital display and control of parameters such as motor speed and operating current, offering convenient and intuitive operation. The frequency converter, controlled via the bus, precisely adjusts the motor speed to meet testing requirements under various operating conditions. The system can monitor circuit voltage, current, and motor operating status in real time, promptly detecting abnormalities and ensuring test safety. The modular design facilitates system expansion and maintenance, enhancing the flexibility and reliability of the test bench.

[0021] Specifically, the test bench is primarily used in maintenance companies specializing in the overhaul and intermediate repair of special vehicles. It is suitable for performance testing and fault diagnosis of the water propulsion systems of special vehicles. By simulating actual working conditions, the test bench can quickly and accurately assess the operational status of the water propulsion system, providing a scientific basis for maintenance decisions.

[0022] In summary, this utility model, through a combination of reasonable mechanical structure design and advanced electrical control technology, achieves efficient testing and evaluation of the performance of special vehicle water propulsion devices, and has significant engineering application value. Attached Figure Description

[0023] Figure 1 This is the front view of the present utility model;

[0024] Figure 2 This is a top view of the present invention.

[0025] Attached image annotations:

[0026] 1. Mounting bracket; 2. Base assembly; 3. Motor support; 4. Motor; 5. Drive shaft; 6. Flange; 7. Electrical control cabinet. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. When the number of elements is referred to as "multiple," it can be any number of two or more. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings:

[0031] A test bench for water propulsion systems of special vehicles, whose combination of mechanical and electrical components enables efficient and accurate performance testing of water propulsion systems. The following will be discussed in conjunction with the attached... Figure 1 and attached Figure 2 The accompanying drawings, along with the component numbers marked in the diagrams, provide a detailed explanation of the specific implementation method of the test bench.

[0032] The basic support structure of the test bench consists of a base assembly 2, whose design fully considers rigidity and stability requirements. A mounting base 1 and a motor support 3 are installed on the base assembly 2, located on opposite sides to ensure that vibrations and loads generated during testing do not affect the equipment's operation. The mounting base 1 is made of high-strength material and is connected to the base assembly 2 by bolts or welding, primarily used to secure the water propeller under test. The mounting base 1 is designed to accommodate the installation requirements of water propellers of different specifications; therefore, multiple mounting holes are pre-drilled on its surface to facilitate adaptation to different propeller models. The motor support 3 is specifically designed to secure the motor 4, and its structural design fully considers the weight distribution characteristics of the motor 4 and potential vibrations during operation. The bottom of the motor support 3 is connected to the base assembly 2 via reinforcing ribs, further enhancing the overall structural stability.

[0033] The output end of motor 4 is rigidly connected to drive shaft 5 via flange 6. The function of drive shaft 5 is to transmit the power output from motor 4 to the water propulsion device under test. The fitting accuracy between flange 6 and drive shaft 5 directly affects the power transmission efficiency; therefore, the coaxiality error between the two must be strictly controlled during actual assembly. The other end of drive shaft 5 is connected to the input shaft of the water propulsion device via a coupling, thereby achieving seamless power transmission. To reduce testing errors caused by loosening or energy loss, high-precision bearings and fasteners are used in the connection between flange 6 and drive shaft 5 to ensure stable power output even under high-speed operation.

[0034] The core components of the electrical system are integrated in the electrical control cabinet 7, which contains a frequency converter, a Kunlun Tongtai touchscreen, an RS485 communication module, and related sensor modules. The control cabinet 7 is connected to the motor 4 via cables, controlling the forward and reverse rotation and speed regulation of the motor 4. The frequency converter is a key component of the electrical system; it receives commands from the touchscreen via an RS485 bus and adjusts its output frequency based on the received data, thereby achieving precise control of the motor 4's speed. The touchscreen acts as the master station, interacting with multiple slave modules via the RS485 bus, including digital input modules, digital output modules, and analog input modules. Each slave module uses an address recognition mechanism to determine whether to execute the corresponding data frame operation. For example, when the touchscreen sends a data frame to start a three-phase motor, the frequency converter recognizes it, executes the start operation, and drives the motor 4 at the set frequency. If the touchscreen needs to read the frequency converter's operating current value, the frequency converter returns the corresponding data frame, which the touchscreen receives and displays on the screen for real-time monitoring by the operator.

[0035] The RS485 digital input module is responsible for acquiring external signals, such as the status of push-button switches or the triggering status of limit switches. These signals are transmitted to the touchscreen via the RS485 bus to determine the system's operating status. The RS485 digital output module is used to control the actions of external devices, such as the opening and closing of pneumatic solenoid directional valves. The control logic of the pneumatic solenoid directional valve is determined by a preset program on the touchscreen, allowing operators to set relevant parameters via the touchscreen for precise control of the pneumatic system. The RS485 analog input module monitors voltage and current signals in the circuit. These signals are converted by analog-to-speed and current-to-current modules before being transmitted to the touchscreen for display. The signal conversion module design ensures compatibility between different signal types while improving the system's anti-interference capability.

[0036] The actual operation of the test bench is as follows: S1 First, the target speed and direction mode of motor 4 are set via the touchscreen. The touchscreen packages the set parameters into a data frame and sends it to the frequency converter via the RS485 bus. After receiving the data frame, the frequency converter parses the target frequency according to the function code and register address, and adjusts the output frequency to drive motor 4 to run according to the set parameters. S2 During the operation of motor 4, the RS485 analog input module collects the voltage and current signals in the circuit in real time and transmits the collected data to the touchscreen for display. The operator can observe the working status of motor 4 through the touchscreen and promptly detect any abnormalities. S3 When the test bench needs to switch the operating conditions of the water propulsion device, the operator can send a new command data frame through the touchscreen. The frequency converter adjusts the output frequency according to the received command, thereby changing the speed or direction of motor 4. S4 The test bench also supports automatic testing functions. The touchscreen stores a variety of test programs, and the operator can select the appropriate program according to actual needs. The test bench automatically completes the test tasks according to the preset steps, reducing manual intervention and improving testing efficiency.

[0037] The test bench is primarily used in special vehicle repair companies for performance testing and fault diagnosis of water propulsion systems. By simulating actual working conditions, the test bench can quickly and accurately evaluate the operating status of the water propulsion system. For example, in a testing task, the operator installs the water propulsion system to be tested on the fixed base 1 and connects it to the drive shaft 5 via a coupling. Then, the operator sets the target speed of motor 4 to 1500 rpm via the touchscreen and starts the test bench. After receiving the command, the frequency converter adjusts its output frequency to 50Hz, driving motor 4 to run at the target speed. During operation, the RS485 analog input module monitors the voltage and current signals in the circuit in real time and transmits the collected data to the touchscreen display. The operator observes that the operating current of motor 4 is 10A and the voltage is 380V, both within the normal range. Subsequently, the operator switches the steering mode of motor 4 via the touchscreen, and the frequency converter adjusts its output frequency according to the new command, causing motor 4 to run in reverse mode. The entire testing process lasted 10 minutes. The test bench recorded the performance parameters of the water propulsion device under different operating conditions, providing a scientific basis for subsequent maintenance decisions.

[0038] The modular design of the test bench significantly improves the system's flexibility and maintainability. For example, if a slave module fails, operators only need to replace the corresponding module to restore system functionality, without disassembling the entire electrical system. Furthermore, the introduction of the RS232 to RS485 converter expands the number of communication interfaces, meeting the need for simultaneous access of multiple modules. Each module is powered by 24VDC and communicates via an RS485 bus, effectively improving the system's anti-interference capability and reliability.

[0039] In summary, this invention, through a combination of rational mechanical structure design and advanced electrical control technology, achieves efficient testing and evaluation of the performance of special vehicle water propulsion systems. The test bench not only boasts advantages such as convenient operation and precise control, but also meets testing requirements under various working conditions, thus possessing significant engineering application value.

[0040] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. For those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A test bed for water propulsion of special vehicles, characterized in that: Including mechanical part and electrical part, the mechanical part is composed of base assembly (2), fixed seat (1), motor support (3), flange plate (6) and transmission shaft (5), the electrical part includes electric control cabinet (7), motor (4), frequency converter, Kunlun Tongtai touch screen, RS485 communication module and related sensor module, the base assembly (2) is used as supporting component, fixed seat (1) is arranged on one side of base assembly (2) and is used to install the water propeller to be detected, motor support (3) is located on the other side of base assembly (2), flange plate (6) is connected with transmission shaft (5) to transmit power.

2. The test stand of claim 1, wherein: The fixed seat (1) is fixedly connected with the base assembly (2) by bolts or welding, and a plurality of mounting hole positions are reserved to adapt to water propellers of different specifications.

3. The test stand of claim 2, wherein: The bottom of the motor support (3) is provided with a reinforcing rib and is connected with the base assembly (2) to improve the stability of the overall structure.

4. The test stand of claim 1 wherein: The electrical part adopts modular design, the frequency converter, pneumatic electromagnetic reversing valve, circuit breaker, relay and RS485 communication module are integrated in the electric control cabinet (7), and each module realizes communication through RS485 bus.

5. The test stand of claim 4, wherein: The touch screen as the master station carries out data interaction with multiple slave station modules through RS485 bus, and the slave station modules include on-off input module, on-off output module and analog input module.

6. The test stand of claim 1, wherein: High-precision bearings and fasteners are used to connect the flange plate (6) and the transmission shaft (5) to ensure the stability of power transmission.

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