Plunger pump automatic test system for underwater robot hydraulic system

Abstract

The utility model discloses an automatic plunger pump test system for an underwater robot hydraulic system, which belongs to the technical field of underwater mechanical test equipment, the underwater robot hydraulic system comprises a hydraulic oil tank and M plunger pumps which are connected through an oil path, M is a natural number greater than 0, and a gear pump and a motor are mounted on the oil path; the automatic testing system for the plunger pump comprises a parameter adjusting module for adjusting the opening degree of the oil way; the parameter acquisition module is used for carrying out data acquisition on oil parameters in the oil way; the oil parameters comprise flow and pressure; the upper computer performs data interaction with the parameter acquisition module; wherein the upper computer is connected with the main controller through a serial port, and the main controller is respectively connected with the parameter adjusting module, the parameter collecting module and the motor through data lines. By the adoption of the technical scheme, the technical problems that in the prior art, when a plunger pump is tested, efficiency is low, and testing results are not accurate can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of underwater mechanical testing equipment, and particularly relates to an automatic testing system for a plunger pump of an underwater robot hydraulic system. Background Technique

[0002] As is well known, underwater robots play an important role in the fields of ocean exploration, scientific research, military applications, etc. Among them, the buoyancy system in underwater robots is crucial, and the plunger pump, which is the core part of the buoyancy system, is of utmost importance. The plunger pump is used to discharge the hydraulic oil in the fuel tank into the oil bladder to change the buoyancy, attitude, etc. of the underwater robot. Its stability and reliability are crucial factors.

[0003] The current testing method is to manually adjust the overflow valve to make the pressure in the oil circuit reach the target pressure, and then conduct the tests on the flow rate and stability of the plunger pump. After the test is carried out for the target time, the average flow rate during this period is manually recorded. Obviously, there are many defects and deficiencies in the current testing method. For example, there will be errors when manually adjusting the overflow valve to the target pressure, and the pressure will pulsate during the testing process. For example, when the target pressure is 2 MPa, it may pulsate to 2.5 MPa during the testing process, which will cause the flow rate to pulsate and have a great impact on the test results. At the same time, since manual testing is adopted, only single-group tests can be carried out. When the number of groups is small, manual labor can still complete the test in a short time, but when the number of groups is large, a large amount of time and manpower are required to complete the test, which greatly reduces the work efficiency. Content of the Utility Model

[0004] The purpose of the utility model is to provide an automatic testing system for a plunger pump of an underwater robot hydraulic system to solve the technical problems of low efficiency and inaccurate test results of the traditional testing method for plunger pumps mentioned in the above background technique.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An automatic testing system for a plunger pump of an underwater robot hydraulic system, the underwater robot hydraulic system includes a hydraulic oil fuel tank and M plunger pumps connected by an oil circuit, M is a natural number greater than 0, and a gear pump and a motor are installed on the oil circuit; the plunger pump automatic testing system includes:

[0007] A parameter adjustment module for adjusting the opening degree of the oil circuit;

[0008] A parameter acquisition module for collecting data on the oil parameters in the oil circuit; the oil parameters include flow rate and pressure;

[0009] A host computer for data interaction with the parameter acquisition module; wherein:

[0010] The host computer is connected to the main controller through a serial port, and the main controller is respectively connected to a parameter adjustment module, a parameter acquisition module, and a motor through data lines.

[0011] Preferably, the parameter adjustment module includes a proportional solenoid valve installed on the oil circuit. The use of a proportional solenoid valve can precisely adjust the opening degree, has a fast response, a long service life, and is convenient to operate.

[0012] Preferably, the parameter acquisition module includes a flow meter and a pressure sensor installed on the oil circuit. The flow meter is used to measure the flow rate in the oil circuit, and the pressure sensor is used to measure the pressure in the oil circuit. These two parameters are key data for testing the performance of the plunger pump.

[0013] Preferably, a pressure gauge for displaying the pressure is installed on the oil circuit. The pressure gauge can directly display the current oil circuit pressure, which is convenient for the operator to monitor.

[0014] Preferably, a PID adjustment module for controlling the proportional solenoid valve is provided on the main controller. PID adjustment can precisely adjust the proportional solenoid valve to the target pressure, and can suppress pressure fluctuations to ensure the accuracy of test data.

[0015] Preferably, the parameter acquisition module conducts data interaction with the main controller through an INA826 precision instrumentation amplifier. The INA826 amplifier can amplify tiny flow / pressure signals, improve the measurement accuracy, and has strong anti-interference ability.

[0016] Preferably, a voltage follower circuit is provided between the pressure sensor and the main controller, which can reduce the loss of the pressure signal during transmission, extend the transmission distance, and improve the quality.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] The present utility model solves the technical problems of low efficiency of the traditional testing method for a plunger pump and inaccurate test results in the prior art, and comprehensively improves the accuracy, efficiency, convenience, and safety of plunger pump testing; in this application, the parameter adjustment module (proportional solenoid valve) can precisely control the oil pressure and flow rate in the oil circuit, and thus provide precise oil supply requirements for the plunger pump. In this application, through the parameter acquisition module (including a flow meter and a pressure sensor), the oil pressure and flow rate in each oil circuit can be precisely detected to meet the test conditions required by the plunger pump; in this application, through the main controller and the host computer, the monitoring of each working component can be carried out as required, realizing the automation of plunger pump testing and solving the problem of low efficiency of traditional manual testing; specifically:

[0019] In this application, a proportional solenoid valve is used to precisely adjust the opening of the oil circuit. The proportional solenoid valve features fast response, long service life, and convenient operation, which can improve the accuracy and reliability of the test. In this application, a PID adjustment module is set on the main controller to perform precise PID control on the proportional solenoid valve, suppress pressure fluctuations, and ensure accurate test data. The parameter acquisition module interacts with the main controller through an INA826 precision instrumentation amplifier, which can amplify tiny flow / pressure signals, improve measurement accuracy, and has strong anti-interference ability. A voltage follower circuit is set between the pressure sensor and the main controller, which can reduce the loss of pressure signals during transmission, extend the transmission distance, and improve signal quality. The upper computer integrates functional modules such as parameter setting, information display, working stage display, alarm status display, and test record saving, realizing functions such as test parameter setting, status monitoring, and data recording, and improving the convenience and reliability of the test. Brief Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of an automatic test system according to a preferred embodiment of the present invention;

[0021] Figure 2 is a schematic structural diagram of a hydraulic system of an underwater robot according to a preferred embodiment of the present invention.

[0022] In the figure: 1, hydraulic oil tank; 2, gear pump; 3, motor; 4, plunger pump; 5, flowmeter; 6, proportional solenoid valve; 7, pressure gauge; 8, pressure sensor. Detailed Embodiment

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] As Figure 1 - Figure 2 shown:

[0025] Please refer to Figure 1 , a plunger pump automatic test system for an underwater robot hydraulic system. The underwater robot hydraulic system includes a hydraulic oil tank 1 and M plunger pumps 4 connected through an oil circuit, where M is a natural number greater than 0. A gear pump 2 and a motor 3 are installed on the oil circuit. The plunger pump 4 automatic test system includes:

[0026] a parameter adjustment module for adjusting the opening of the oil circuit; the parameter adjustment module includes a proportional solenoid valve 6 installed on the oil circuit. The proportional solenoid valve 6 can precisely adjust the opening, has fast response, long service life, and convenient operation;

[0027] A parameter acquisition module for acquiring data of the hydraulic fluid parameters in the oil circuit. The parameter adjustment module includes a proportional solenoid valve installed on the oil circuit. The proportional solenoid valve can accurately adjust the opening degree, has a fast response, a long service life, and is easy to operate. The hydraulic fluid parameters include flow rate and pressure. The parameter acquisition module includes a flow meter 5 and a pressure sensor 8 installed on the oil circuit. The flow meter 5 is used to measure the flow rate in the oil circuit, and the pressure sensor 8 is used to measure the pressure in the oil circuit. These two parameters are key data for testing the performance of the piston pump 4. A voltage follower circuit is provided between the pressure sensor 8 and the main controller, which can reduce the loss of the pressure signal during transmission, extend the transmission distance, and improve the quality. A pressure gauge 7 for displaying the pressure is installed on the oil circuit. The pressure gauge 7 can intuitively display the current oil circuit pressure, facilitating the operator to monitor. The parameter acquisition module performs data interaction with the main controller through an INA826 precision instrumentation amplifier. The INA826 amplifier can amplify tiny flow / pressure signals, improve the measurement accuracy, and has a strong anti-interference ability.

[0028] A host computer that performs data interaction with the parameter acquisition module. The host computer is connected to the main controller through a serial port. The main controller is respectively connected to the parameter adjustment module through a data line. The parameter acquisition module performs data interaction with the main controller through an INA826 precision instrumentation amplifier. The INA826 amplifier can amplify tiny flow / pressure signals, improve the measurement accuracy, and has a strong anti-interference ability.

[0029] In this application, the proportional solenoid valve, the flow meter 5, the pressure sensor 8, the voltage follower circuit, and the INA826 precision instrumentation amplifier all belong to conventional electrical components and circuits, and will not be elaborated here.

[0030] A host computer that performs data interaction with the parameter acquisition module, the parameter acquisition module, and the motor 3 are connected. A PID adjustment module for controlling the proportional solenoid valve 6 is provided on the main controller. The PID adjustment can accurately adjust the proportional solenoid valve 6 to the target pressure, and can suppress pressure fluctuations to ensure the accuracy of the test data.

[0031] Please refer to Figure 2 , during the test, the gear pump 2 pumps oil from the hydraulic oil tank 1, and then transmits it to the piston pump 4 through the oil circuit. The piston pump 4 returns the hydraulic oil to the tank after passing through the flow meter 5, the pressure sensor 8, the pressure gauge 7, and the proportional solenoid valve 6. The flow meter 5 is used to calculate the average flow rate during the test. The pressure sensor 8 is used to transmit the pressure signal to the main controller. The pressure gauge 7 is used to display the pressure for the tester to view. The proportional solenoid valve 6 is used to adjust the test pressure.

[0032] The working principle of this application is:

[0033] S1. Set test parameters on the host computer according to test requirements; the test parameters include the opening degree, working duration, and number of test times of each proportional solenoid valve 6, and the working parameters of each motor 3.

[0034] S2. The host computer transmits the test parameters to the main controller through the serial port.

[0035] S3. The main controller issues control commands to the parameter adjustment module and the motor 3 according to the test parameters.

[0036] S4. The parameter adjustment module and the motor 3 perform corresponding actions according to the control commands; specifically including: the parameter adjustment module adjusts the opening degree of the oil circuit where it is located; the parameter acquisition module acquires the flow rate and pressure in the oil circuit where it is located; the parameter acquisition module first acquires the flow rate and pressure in the oil circuit where it is located, then amplifies the acquired data through the INA826 precision instrumentation amplifier, and finally sends the amplified acquired data to the main controller.

[0037] S5. The main controller receives the acquired data of the parameter acquisition module; and performs PID control on the parameter adjustment module according to the pressure data; the main controller sends the received acquired data to the host computer.

[0038] During the test, the main controller will first output current to control the proportional solenoid valve 6 to make the pressure in the oil circuit reach the preset value. At this time, the system operation status in the information display module will show that it is working, and the green indicator light in the pressure adjustment stage of the working status module will flash. After the pressure adjustment is completed, the flow rate test will be carried out. The main controller controls the gear pump 2 and the plunger pump 4 to work. At the same time, the flowmeter 5 outputs the real-time average flow rate, and the pressure sensor 8 collects the pressure signal and transmits the signal to the main controller. During the whole test process, the main controller will also collect the voltage and current of the test device in real time to prevent equipment damage caused by faults. During the test, the average flow rate, average voltage, and average current will be displayed in the parameter setting module after each group of tests is completed. The information display module will display the group being tested, the group pressure, the completed duration, the completed number of times, the real-time flow rate, the pump speed, and the real-time voltage and current.

[0039] Define each plunger pump, the oil circuit corresponding to the plunger pump, the proportional solenoid valve 6 arranged on the oil circuit, the flowmeter 5, the pressure sensor 8, and the pressure gauge 7 as a test group.

[0040] The above is only the preferred embodiment of the present invention, and it is not used to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A plunger pump automatic testing system for an underwater robot hydraulic system, the underwater robot hydraulic system comprising a hydraulic oil tank (1) and M plunger pumps (4) connected by an oil circuit, M being a natural number greater than 0, and a gear pump (2) and a motor (3) being installed on the oil circuit; characterized in that: The plunger pump automatic testing system comprises: A parameter adjustment module for adjusting the opening of the oil circuit; A parameter acquisition module for acquiring data on oil parameters in the oil circuit; the oil parameters include flow rate and pressure; A host computer that interacts with the parameter acquisition module for data; wherein: The host computer is connected to the main controller via a serial port, and the main controller is respectively connected to the parameter adjustment module, the parameter acquisition module, and the motor (3) via data lines.

2. The automatic testing system for the plunger pump of the underwater robot hydraulic system according to claim 1, characterized in that: The parameter adjustment module comprises a proportional solenoid valve (6) installed on the oil circuit.

3. The automatic testing system for the plunger pump of the underwater robot hydraulic system according to claim 1, characterized in that: The parameter acquisition module comprises a flow meter (5) and a pressure sensor (8) installed on the oil circuit.

4. The automatic testing system for the plunger pump of the underwater robot hydraulic system according to claim 1, characterized in that: A pressure gauge (7) for displaying pressure is installed on the oil circuit.

5. The automatic testing system for the plunger pump of the underwater robot hydraulic system according to claim 2, characterized in that: The main controller is provided with a PID regulating module for controlling the proportional solenoid valve (6).

6. The automatic testing system for the plunger pump of the underwater robot hydraulic system according to claim 1, characterized in that: The parameter acquisition module exchanges data with the main controller via the INA826 precision instrument amplifier.

7. The automatic testing system for the plunger pump of the underwater robot hydraulic system according to claim 3, characterized in that: A voltage follower circuit is arranged between the pressure sensor (8) and the main controller.

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