Liquid delivery device capability testing system and method

Abstract

The application discloses a liquid delivery device capacity test system and method. The test system comprises a steady flow tank, a cavitation tank, a coarse regulating valve, a fine regulating valve, a cavitation module, a vacuum module, a pressure increasing module, a pressure relief module, a monitoring device and a control unit, etc. The liquid inlet of the liquid delivery device to be tested is communicated with the liquid outlet of the steady flow tank through a first pipeline, the liquid outlet of the liquid delivery device is communicated with the liquid inlet of the steady flow tank through a second pipeline, the coarse regulating valve and the fine regulating valve are arranged in parallel on the second pipeline, and the monitoring device is connected with the control unit. The liquid delivery device capacity test system and method can significantly improve the accuracy and reliability of the liquid delivery device capacity test result.

Description

Technical Field

[0001] This application specifically relates to a liquid delivery device capability testing system and method, belonging to the field of testing technology. Background Technology

[0002] Liquid delivery device capability testing systems are widely used in performance testing, cavitation testing, and life testing of spacecraft circulating pumps. However, existing liquid delivery device capability testing systems generally suffer from drawbacks such as large footprint and inaccurate precision. Moreover, they are typically only suitable for testing large equipment; when used to test small equipment, repeatability is poor, requiring manual on-site measurements. The results also require post-processing, and the reliability and accuracy of the experimental data cannot be guaranteed. These systems are costly, expensive, and have low precision, thus requiring urgent improvement. Summary of the Invention

[0003] The main objective of this application is to provide a liquid conveying device capability testing system and method to overcome the shortcomings of the prior art.

[0004] To achieve the aforementioned objectives, the technical solution adopted in this application includes:

[0005] One aspect of this application provides a liquid delivery device capability testing system, comprising a flow stabilizing tank, a coarse regulating valve, a fine regulating valve, a cavitation module, a vacuum module, a pressurizing module, a pressure relief module, a monitoring device, and a control unit. The liquid inlet of the liquid delivery device under test is connected to the liquid outlet of the flow stabilizing tank via a first pipeline, and the liquid outlet of the liquid delivery device is connected to the liquid inlet of the flow stabilizing tank via a second pipeline. The coarse regulating valve and the fine regulating valve are arranged in parallel on the second pipeline. The cavitation module includes a cavitation tank connected to the flow stabilizing tank, and the vacuum module, pressurizing module, and pressure relief module are all connected to the cavitation tank. The monitoring device is connected to the control unit and includes a sensing device for monitoring liquid flow rate, liquid temperature, liquid level, gas pressure, and noise at a specified location within the testing system.

[0006] In one embodiment, the liquid delivery device capability testing system further includes a liquid pipeline outlet valve disposed on the first pipeline and a liquid pipeline inlet valve disposed on the second pipeline.

[0007] In one embodiment, the liquid delivery device capability testing system further includes a filter and / or transition connection device disposed on the first pipeline.

[0008] In one embodiment, the liquid delivery device capability testing system further includes a coolant inlet valve and a coolant outlet valve respectively installed at the coolant inlet and coolant outlet of the cavitation tank.

[0009] In one embodiment, the liquid delivery device capability testing system further includes a manual liquid regulating valve and a solenoid liquid regulating valve, which are installed on the liquid pipeline connecting the cavitation tank to an external water inlet. The solenoid liquid regulating valve allows for remote control of water injection during testing; for example, the water injection volume can be determined by adjusting the opening amplitude and / or opening time of the solenoid liquid regulating valve. Here, "water" refers to the liquid working medium. The manual liquid regulating valve is used to maintain a normally closed state after the test to ensure system stability.

[0010] In one embodiment, the liquid delivery device capability testing system further includes a drive motor and a motor driver, wherein the drive motor is used to drive the liquid delivery device and is electrically connected to a control power supply via the motor driver.

[0011] In one embodiment, the monitoring device includes an inlet pressure sensor and an outlet pressure sensor respectively disposed at the liquid inlet and liquid outlet of the liquid conveying device.

[0012] In one embodiment, the monitoring device includes a flow meter disposed on the second pipeline.

[0013] In one embodiment, the monitoring device includes a stabilizing tank inlet temperature sensor and a stabilizing tank outlet temperature sensor respectively disposed at the liquid inlet and liquid outlet of the stabilizing tank.

[0014] In one embodiment, the monitoring device includes a level gauge for monitoring the liquid level in the flow stabilizer tank.

[0015] In one embodiment, the vacuum module includes a vacuum device, a vacuum solenoid regulating valve, and a vacuum manual regulating valve, the vacuum solenoid regulating valve and the vacuum manual regulating valve being disposed on a gas pipeline for connecting the vacuum device and the cavitation tank.

[0016] In one embodiment, the pressurization module includes a pressurization device, a pressure regulating solenoid valve, and a pressure regulating manual valve, wherein the pressure regulating solenoid valve and the pressure regulating manual valve are disposed on a gas pipeline for connecting the pressurization device and the cavitation tank.

[0017] In one embodiment, the pressure relief module includes a manual exhaust regulating valve and an exhaust solenoid regulating valve, which are disposed on a gas pipeline for connecting the cavitation tank to the external environment.

[0018] In one embodiment, the second pipeline includes multiple concentric reducer sections, the diameter of which increases along the flow direction of the liquid working medium.

[0019] In one embodiment, the liquid inlet of the liquid conveying device is further provided with a bubble discharge outlet for discharging bubbles from the liquid working medium flowing through the first pipeline.

[0020] In one embodiment, the control unit is also connected to the control module of at least a portion of the electric or electromagnetic drive equipment in the test system.

[0021] In one embodiment, the flow stabilizer has an inlet pipe connected to a second pipeline, an outlet pipe connected to a first pipeline, a water inlet, a drain outlet, a pressure boosting interface, a pressure relief interface, a vacuum interface, and a temperature transmitter. The water inlet is located at the top of the cavitation tank, the cavitation tank is located above the flow stabilizer, the drain outlet is located at the bottom of the flow stabilizer, the pressure boosting interface, the pressure relief interface, and the vacuum interface are all located on the cavitation tank and are respectively used to connect to the pressure boosting module, the pressure relief module, and the vacuum module. The temperature transmitter includes a coolant inlet valve and a coolant outlet valve connected to the flow stabilizer.

[0022] In one embodiment, the liquid delivery device capability testing system further includes a test bench, the liquid delivery device is installed on the test bench, and the liquid outlet of the flow stabilizer is connected to the liquid inlet of the liquid delivery device in sequence through a sanitary ball valve, a filter and a reducing pipe. The sanitary ball valve and the filter are both installed on a first pipeline, the first pipeline includes a reducing pipe, and the installation position of the liquid delivery device is higher than the reducing pipe.

[0023] In one embodiment, the liquid delivery device capability testing system further includes a liquid collection device for collecting liquid working medium leaking from the test pipeline. The liquid collection device is provided with a liquid outlet that is connected to a liquid storage tank.

[0024] Another aspect of this application provides a method for testing the capability of a liquid delivery device, the method being implemented based on the liquid delivery device capability testing system, and the method comprising:

[0025] a. Install the liquid delivery device and drive motor to be tested on the test bench, and inject the liquid working medium into the flow stabilizing tank from the water inlet at the top of the cavitation tank;

[0026] b. Power on the test system;

[0027] c. Begin acquiring signals using the monitoring device within the testing system;

[0028] d. Start operating the pressurization device and all pipeline valves to remove air bubbles from the test pipeline;

[0029] e. Operate the motor driver to turn on the drive motor;

[0030] f. Start the test.

[0031] In one embodiment, the liquid conveying device capability testing method further includes: during the test, recording and establishing a relationship curve between the operating parameters of the liquid conveying device and the flow rate of the liquid working medium, wherein the operating parameters of the liquid conveying device include head, power, and efficiency.

[0032] In one embodiment, the liquid conveying device capability testing method further includes: operating the liquid conveying device under set drive motor speed and set liquid working medium flow rate conditions, and conducting a cavitation test to determine the cavitation characteristics of the liquid conveying device, and obtaining the relationship curve between the net positive suction head and the head of the liquid conveying device and the critical cavitation point.

[0033] In one embodiment, the liquid conveying device capability testing method further includes: monitoring the noise value generated by the liquid conveying device during operation with a noise detection device, and establishing a relationship curve between the noise value change and the working performance of the liquid conveying device to determine the service life of the liquid conveying device.

[0034] Compared with the prior art, the liquid conveying device capability testing system and method of this application can significantly improve the accuracy and reliability of liquid conveying device capability testing results. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a top view of a liquid delivery device capacity testing system according to an embodiment of this application;

[0037] Figure 2 This is a front view of a flow stabilizing tank according to an embodiment of this application;

[0038] Figure 3 This is a top view of a flow stabilizing tank according to one embodiment of this application;

[0039] Figure 4 This is a side view of a flow stabilizing tank according to one embodiment of this application;

[0040] Figure 5 This is a front view of a flow stabilizing tank and a test bench according to an embodiment of this application;

[0041] Figure 6 This is a top view of a flow stabilizing tank and a test bench according to an embodiment of this application;

[0042] Figure 7 This is a cross-sectional view of an outer nut in one embodiment of this application;

[0043] Figure 8 This is a schematic diagram of the frame of a test bench according to one embodiment of this application;

[0044] Figure 9 This is a schematic diagram of the mounting hole positions of a test bench according to one embodiment of this application;

[0045] Figure 10 yes Figure 6 The diagram shows the structure of the second pipeline. Detailed Implementation

[0046] In view of the shortcomings of the prior art, the inventors of this application, through long-term research and extensive practice, have come up with the technical solution of this application. The following will further explain and illustrate the technical solution, its implementation process, and principles. It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0047] Please see Figure 1 As shown, an embodiment of this application provides a liquid delivery device capability testing system including a flow stabilizing tank 3, a coarse regulating valve 6, a fine regulating valve 7, a cavitation module, a vacuum module, a pressurizing module, a pressure relief module, a monitoring device, and a control unit. The liquid inlet of the liquid delivery device 4 under test is connected to the liquid outlet of the flow stabilizing tank 3 via a first pipeline, and the liquid outlet of the liquid delivery device 4 is connected to the liquid inlet of the flow stabilizing tank 3 via a second pipeline. The coarse regulating valve 6 and the fine regulating valve 7 are arranged in parallel on the second pipeline. The cavitation module includes a cavitation tank 11, which is connected to the flow stabilizing tank 3. The vacuum module, pressurizing module, and pressure relief module are all connected to the cavitation tank 11. The monitoring device is connected to the control unit and includes a sensing device for monitoring the liquid flow rate, liquid temperature, liquid level, gas pressure, and noise at a specified location within the testing system. The flow direction of the liquid working medium in the testing system is as follows: Figure 1 As shown by the arrow in the image.

[0048] Furthermore, the liquid delivery device capacity testing system of this embodiment can be considered to mainly consist of a hydraulic unit, a pneumatic unit, and a control unit. The hydraulic unit can be mainly composed of a flow stabilizing tank 3, a cavitation tank 11 connected to the flow stabilizing tank 3, a coarse regulating valve 6, a fine regulating valve 7, a liquid pipeline inlet valve 8, a liquid pipeline outlet valve 16, a water inlet and outlet of the flow stabilizing tank, a transition connection device 17, and a flow measurement test pipeline including the aforementioned first and second pipelines. Using the flow stabilizing tank 3, a significant flow stabilization effect can be provided.

[0049] In a preferred embodiment of this invention, the flow stabilizer 3 and the cavitation tank 11 are separate structures, which differs from the existing integrated design of the flow stabilizer and cavitation tank. This avoids problems such as inaccurate data in the relevant performance tests of the flow stabilizer and cavitation tank after multiple cavitation tests, and the inability to maintain their accuracy.

[0050] In one embodiment of this invention, by setting the coarse regulating valve 6 and the fine regulating valve 7 in parallel and cooperating with relevant inlet and outlet valves, parallel diversion of the liquid working medium can be achieved, and the flow rate of the liquid working medium can be controlled in stages, thereby making the measurement results accurate and reliable and improving the testing efficiency. Specifically, the coarse regulating valve 6 can be used first to adjust the flow rate of the liquid working medium and initially achieve a rough accuracy range. The specific range of the system flow rate can be obtained through the feedback of the flow count value. When the flow count value is too large or too small, the flow rate when the coarse regulating valve operates first is close to the preset specified value. Through the feedback mechanism of the detection system, the adjustment control signal is compared with the accuracy range set by the upper computer through the lower computer. After the flow value accuracy reaches a relatively close value after the initial coarse adjustment, the fine regulating valve 7 is used for precise adjustment to stably achieve the increase or decrease of the liquid working medium within its working range. Finally, the flow rate is accurately controllable through the cooperation of the feedback mechanism and the control mechanism of the detection system. Furthermore, by adopting the aforementioned graded adjustment method, the pressure on a single pipeline of a small-to-medium-sized liquid conveying device under high-power operation is reduced, thereby significantly extending the pipeline's service life and ensuring the system's working life.

[0051] In one embodiment of this invention, the gas path unit may consist of a vacuum module, a pressurization module, a pressure relief module, a cavitation module, etc.

[0052] The vacuum module mainly consists of a vacuum device 2, a vacuum electromagnetic regulating valve 23, and a vacuum manual regulating valve 22. The vacuum electromagnetic regulating valve 23 and the vacuum manual regulating valve 22 are installed on the gas pipeline connecting the vacuum device 2 and the cavitation tank 11. The vacuum device 2, in conjunction with the cavitation tank 11, can simulate the working performance of the liquid delivery device under specific operating conditions.

[0053] The pressurization module mainly consists of a pressurization device 25, a pressure regulating solenoid valve 26, and a pressure regulating manual valve 24. The pressure regulating solenoid valve 26 and the pressure regulating manual valve 24 are installed on the gas pipeline connecting the pressurization device 25 and the cavitation tank 11. The pressurization device can simulate extreme external environments to detect the operating status of the liquid delivery device 4 under different scenarios (i.e., operating conditions under different internal pressures).

[0054] The pressure relief module mainly consists of a manual exhaust regulating valve 29 and an exhaust solenoid regulating valve 30, which are installed on the gas pipeline used to connect the cavitation tank 11 to the external environment.

[0055] In one embodiment of this invention, the liquid delivery device capability testing system further includes multiple liquid flow valves, airflow valves, liquid flow filtration devices, transfer devices, and other auxiliary components. For example, the liquid delivery device capability testing system also includes:

[0056] The liquid outlet valve 16 is installed on the first pipeline and the liquid inlet valve 8 is installed on the second pipeline.

[0057] The filter 15 and the transition connection device 17 are installed on the first pipeline.

[0058] A coolant inlet valve 10 is installed at the coolant inlet of the cavitation tank 11, and a coolant outlet valve 13 is installed at the coolant outlet of the cavitation tank 11.

[0059] The liquid manual regulating valve 27 and the liquid solenoid regulating valve 28 are installed on the liquid pipeline that connects the cavitation tank 11 to the external water inlet (not shown in the figure) and the liquid holding device.

[0060] In one embodiment of this invention, the liquid delivery device capability testing system further includes a drive motor 1 and a motor driver 20. The drive motor 1 is used to drive the liquid delivery device 4, and the drive motor 1 is electrically connected to the control power supply 21 through the motor driver 20.

[0061] In one embodiment of this example, the monitoring device includes:

[0062] Pressure sensors 18 and 19 are respectively installed at the liquid inlet and liquid outlet of the liquid conveying device 4.

[0063] Flow meter 5 is installed on the second pipeline;

[0064] Temperature sensors 9 and 14, respectively installed at the liquid inlet and liquid outlet of the stabilizing tank 3, are used to monitor the heat transfer loss and abnormal operation of the liquid transport device in real time.

[0065] A level gauge 12 for monitoring the liquid level in the flow stabilizing tank 3; and

[0066] A noise sensor is used to monitor the noise generated when the liquid conveying device 4 is working, thereby enabling the detection of abnormal operating conditions of the liquid conveying device 4 and the prediction of its service life.

[0067] In some cases, the liquid delivery device capacity testing system may also include an alarm, which is used to issue an alarm signal when the flow rate, pressure, liquid level, or gas pressure of the liquid working medium exceeds or falls below a preset threshold.

[0068] Furthermore, in this embodiment, the drive components, valves, and sensors within the liquid delivery device capability testing system can be configured to be unmanned and remotely controlled. For example, the drive components, valves, and sensors can be connected to the control unit via Bluetooth, Wi-Fi, or signal transmission cables, and the remote control can be performed by the control unit.

[0069] In one embodiment of this invention, the control unit may include a control console, a monitoring display, and other related equipment. Preferably, the control unit can achieve fully computerized remote control and data acquisition, ensuring that the test personnel and test equipment maintain a safe distance during the test. In some cases, LabVIEW or similar virtual instrument platforms can be used in the control unit to save a large number of secondary instruments and to integrate data acquisition, while modularizing the data processing, storage, and display components.

[0070] In this embodiment, by connecting the liquid delivery device 4 (the object under test) to the flow stabilizing tank 3 via multiple connecting pipes and by setting up various types of sensors, a closed-loop measurement and control system can be formed. This provides a stable external flow field for the object under test, allowing the liquid working medium used for testing to enter the object under test 4 in a preset pipeline flow direction, in conjunction with the working mode of the gas circuit unit and the object under test 4, and thus obtaining relevant performance results. The type and concentration ratio of the liquid working medium can be prepared and stabilized within the hydraulic unit before the flow meter 5 is installed and operated.

[0071] Please see Figures 2-6 In one embodiment of this example, the flow stabilizing tank 3 has an inlet pipe 34 connected to the second pipeline, an outlet pipe 43 connected to the first pipeline, a water inlet 37, a drain outlet 44, a pressure boosting interface 79, a pressure relief interface 39, a vacuum interface 38, and a temperature transmitter 46, etc.

[0072] The outlet pipe 43 and inlet pipe 34 can be securely connected to the external pipeline by means of stainless steel quick-connect clamps, chucks or buckles and other connecting parts. Rubber gaskets can also be added to the connecting parts to prevent leakage of liquid working medium.

[0073] The liquid working medium can return to the stabilizing tank 3 through the inlet pipe 34 and enter the liquid conveying device 4 through the outlet pipe 43. Because the internal horizontal space of the stabilizing tank 3 is relatively large, the liquid working medium can form a small-tide spiral circulation in the stabilizing tank, thereby providing a sufficiently stable hydrological environment.

[0074] The cavitation tank 11 is positioned above the flow stabilizing tank 3, the water inlet 37 is located at the top of the cavitation tank 11, and the drain outlet 44 is located at the bottom of the flow stabilizing tank 3. This allows the liquid working medium to enter and exit the tank by utilizing its fluidity and weight. Furthermore, the water inlet 37 and the drain outlet 44 can be used in conjunction with a parallel manual valve and a parallel electromagnetic valve, and are threadedly connected to the flow stabilizing tank.

[0075] Additionally, a level gauge 12, a safety valve, and other related equipment can be installed on the stabilizing tank 3. For example, the level gauge 12 can be used to transmit the internal volume (i.e., liquid level) of the stabilizing tank 3 to the control console of the control unit in real time, and a level alarm 32 can also be installed to issue an alarm signal when the liquid level is abnormal. The level gauge 12 can be threaded onto the wall of the cavitation tank 11, and a manual switch valve can also be installed at the threaded connection to control the level gauge.

[0076] The pressurization port 79, the pressure relief port 39, and the vacuum port 38 can all be fixed to the cavitation tank 11 by means of threaded connection, and are respectively used to connect to the pressurization module, the pressure relief module, and the vacuum module.

[0077] The temperature transmitter 46 includes a coolant inlet valve 42 and a coolant outlet valve 45 connected to the flow stabilizer 3. The temperature transmitter 46 can simulate changes in the external environment that alter the temperature of the liquid working medium, thus adapting it to the operating temperature requirements of each tested liquid delivery device.

[0078] The cavitation tank 11 has a cavitation tank body and a cavitation tank cover 31. The cavitation tank cover 31 and the cavitation tank body can be connected by bolts and nuts. In order to make its airtightness more stable, a rubber gasket 40 can also be added to the connection.

[0079] The outer wall of the flow stabilizer 3 can be connected to and supported by the wheel bracket 35. A wheel can also be welded and fixed on the wheel bracket 36. The wheel can be a heavy-duty swivel wheel, etc.

[0080] In one embodiment of this invention, the liquid inlet of the liquid delivery device 4 can be connected to a PVC wire hose via a threaded connection structure, which can be formed by the mating of an inlet interface pipe and an outer nut 78. Specifically, the PVC wire hose can be securely connected to the inlet interface pipe using a stainless steel clamp with a handle. This threaded connection can include a bubble outlet and an interface with the pressure sensor 18 at the inlet. The PVC wire hose is preferably used within a specified temperature and pressure range. When gas is injected into the flow stabilizing tank 3 via a pressurizing device, increasing its internal pressure, any valve can be slowly opened / closed to prevent pressure surges and damage to the PVC wire hose. The increased pressure within the flow stabilizing tank 3 causes gas in the liquid working medium to rise, which can be seen through the PVC wire hose and discharged from the bubble outlet. The structure of the outer nut can be referenced... Figure 7 .

[0081] Please continue reading. Figures 5-6 In one embodiment of this invention, the liquid delivery device capability testing system further includes a test bench 67 and a liquid holding device 70. The liquid delivery device 4 is mounted on the test bench 66. The liquid outlet of the flow stabilizing tank 3 is connected to the liquid inlet of the liquid delivery device 4 via a sanitary ball valve 73, a filter 15, and a reducing pipe 75. The sanitary ball valve 73 and the filter 15 are both located on a first pipeline, which includes the reducing pipe 75. By using the reducing pipe 75, flow reduction, air bubble removal, and alteration of the liquid flow rate centerline can be achieved. Furthermore, the liquid delivery device 4 is installed higher than the reducing pipe 75 to facilitate the smooth removal of air bubbles for observation. The liquid holding device 70 is used to hold the liquid working medium discharged during the experiment to remove air bubbles. In some cases, a vacuum device can be used to lower the internal pressure of the testing system below atmospheric pressure, thereby allowing the liquid working medium in the holding device 70 to be returned to the flow stabilizing tank.

[0082] Furthermore, the liquid-containing device 70 can be made of aluminum alloy and has a liquid outlet 77 connected to a liquid storage tank, allowing liquid to flow from the outlet 77 into the tank. The liquid referred to here is the liquid working medium discharged during the experiment to remove air bubbles. The liquid storage tank can also additionally store liquid working medium to test for losses due to vaporization, evaporation, leakage, etc., during the experiment. Please also refer to... Figures 8-9The test bench 66 has an aluminum alloy frame 67, and its tabletop is made of alloy steel and covered with an anti-rust coating. T-shaped grooves 68 can be provided on the tabletop, and the tabletop can be fixed within the aluminum alloy frame by a large counterweight to provide stability and achieve vibration damping. The liquid transport device 4 and the drive motor 1 are fixed on the tabletop. The motor driver 20 is connected to the motor 1 using a metal aviation socket. The motor driver 20 is connected to an external power supply, and the control power supply 21 controls the output voltage of the driver 20, thereby controlling the rotation of the drive motor 1.

[0083] In one embodiment of this example, the structure of the second pipeline can be referred to... Figure 10 The second pipeline includes multiple concentric reducer sections, the diameter of which increases along the flow direction of the liquid working medium. Specifically, the second pipeline includes elbow fitting 47, concentric reducer 48, long fitting 49, concentric reducer 54, short fitting 51, long fitting 61, etc. Among them, the elbow fitting 47 is fastened to the flow stabilizer tank by a stainless steel quick-connect clamp, and the elbow fitting is fastened to the concentric reducer 48 by a stainless steel quick-connect clamp, and the manual opening / closing knife valve 53 connects the long fitting 49 to the concentric reducer 48. The long fitting 49, the concentric reducer 54, and the short fitting 51 are fastened to the clamp quick-connect tee 50 by a stainless steel quick-connect clamp, and the elbow fitting 52 is fastened to the concentric reducer 62 by a stainless steel quick-connect clamp, and the coarse regulating valve 6 and the matching tee fitting 63 are connected by threads. The concentric reducer 64 is connected to the quick-connect tee fitting 65. The fine regulating valve 7 is threaded to the matching tee fitting 55. The matching tee fitting 55 is connected to the concentric reducer 56. The concentric reducer 56 is connected to the quick-connect elbow fitting 57. Fitting 58 is connected to the quick-connect elbow fitting 57. Fitting 58, quick-connect tee fitting 65, and fitting 59 are connected. Fitting 59 is connected to the quick-connect tee fitting 65 and the matching tee fitting 60. The matching tee fitting 60 and the flow meter 19 are threaded. The matching tee fitting 60 is also connected to the liquid outlet of the liquid conveying device through the long fitting 61. In some cases, in this second pipeline, the remaining fittings, tee valves, etc., can be fastened together by stainless steel quick-connect clamps and clamps.

[0084] In this embodiment, the liquid transport device 4 is preferably a small to medium-sized liquid transport device, which has high testing accuracy and is easy to install and disassemble.

[0085] In this embodiment, the liquid working medium can be determined according to experimental requirements. For example, it can be selected from one of the liquids such as water, ethylene glycol, and aviation kerosene, or a mixture of multiple liquids in a set proportion, depending on the working scenario.

[0086] The liquid delivery device capability testing system of this embodiment can achieve an accuracy of 0.5% in flow rate control and a repeatability of 1%, and has broad application prospects in the fields of performance testing of micro pumps and fluid mechanics.

[0087] This embodiment also provides a method for testing the capability of a liquid conveying device, which is implemented based on the liquid conveying device capability testing system and can meet the needs of various testing modes.

[0088] For example, for routine testing, the testing method includes:

[0089] a. Install the liquid delivery device 4 (e.g., pump) and its drive motor 1 on the test bench, and inject the liquid working medium into the flow stabilizing tank from the water inlet 37 at the top of the cavitation tank 11.

[0090] b. Power on the test system;

[0091] c. Begin collecting signals using monitoring devices such as pressure sensors, temperature sensors, and level gauges within the testing system;

[0092] d. Start operating the pressurization device and all pipeline valves to remove air bubbles from the liquid delivery device 4, pressure measuring instrument 18, pressure measuring instrument 19, and their supporting pipelines.

[0093] e. Operate the motor driver to turn on drive motor 1;

[0094] f. Start the test.

[0095] Furthermore, in this test method, after completing step e, step ex can be performed first, followed by step f. Step ex includes: first selecting to adjust the flow rate of the liquid working medium, which can be automatic or manual; when the real-time flow rate of the liquid working medium is adjusted to the preset flow rate, setting the motor parameters of the drive motor 1, including the motor drive voltage, current, frequency, and the efficiency of the motor drive pump, etc.

[0096] In step f, all data can be recorded in real time. Furthermore, steps ex) and f) can be repeated in this test method until all flow points to be measured are completed, after which the test ends.

[0097] Furthermore, during the testing process, the relationship curve between the operating parameters of the liquid conveying device 4 and the flow rate Q of the liquid working medium can be recorded and established. The operating parameters of the liquid conveying device 4 include head H, power P, and efficiency η.

[0098] Where H = 16.103536 - 0.003552 × Q + 6.72491E - 8 × Q^2.

[0099] P=72.828827 - 0.094626×Q + 0.000122×Q^2.

[0100] η= -0.127031 + 0.001495×Q - 1.037992E-6×Q^2.

[0101] For example, for cavitation testing, the test method includes:

[0102] a. Install the liquid delivery device 4 (e.g., pump) and its drive motor 1 on the test bench, and inject the liquid working medium into the flow stabilizing tank from the water inlet 37 at the top of the cavitation tank 11.

[0103] b. Power on the test system;

[0104] c. Begin collecting signals using monitoring devices such as pressure sensors, temperature sensors, and level gauges within the testing system;

[0105] d. Start operating the pressurization device and all pipeline valves to remove air bubbles from the liquid delivery device 4, pressure measuring instrument 18, pressure measuring instrument 19, and their supporting pipelines.

[0106] e1. Set the parameters required for the cavitation test;

[0107] e2. Set the desired output voltage and current;

[0108] e3. Operate the motor driver to turn on drive motor 1;

[0109] e4. Select the flow rate ratio and adjust the flow rate of the liquid working medium to the preset flow rate through automatic or manual adjustment. Then set the motor parameters of drive motor 1, including motor drive voltage, current, frequency and motor drive pump efficiency, etc.

[0110] f1. Start the test and record all test data;

[0111] f2. Start the vacuum device to begin evacuation. Once cavitation is confirmed, stop recording data and then end the test.

[0112] Furthermore, during the testing process, the liquid conveying device 4 can be operated under the set drive motor speed and the set liquid working medium flow rate, and a cavitation test can be conducted to determine the cavitation characteristics of the liquid conveying device 4, obtain the relationship curve between the net positive suction head and the head of the liquid conveying device 4, and the critical cavitation point.

[0113] Furthermore, during the testing process, a noise detection device can be used to monitor the noise level generated by the liquid conveying device during operation, and a curve showing the relationship between the noise level change and the performance of the liquid conveying device can be established to determine the service life of the liquid conveying device.

[0114] The test method is preferably carried out under set temperature, humidity, and noise conditions to ensure that the test results meet the test requirements.

[0115] It should also be noted that, unless otherwise specified, the operations in the test method of this application can all adopt the conventional operations specified in GB / T 3216-2016.

[0116] Although this application has been described with reference to illustrative embodiments, those skilled in the art will understand that various other changes, omissions, and / or additions may be made without departing from the spirit and scope of this application, and that elements of the described embodiments may be substituted with substantially equivalents. Furthermore, many modifications may be made without departing from the scope of this application to adapt particular situations or materials to the teachings of this application. Therefore, this application is not intended to be limited to the specific embodiments disclosed for carrying out this application, but rather is intended to include all embodiments falling within the scope of the appended claims.

Claims

1. A liquid conveying device capacity testing system, characterized in that, It includes a flow stabilizer (3), a coarse regulating valve (6), a fine regulating valve (7), a cavitation module, a vacuum module, a pressure boosting module, a pressure relief module, a monitoring device, a drive motor (1), a motor driver (20), and a control unit; The stabilizing tank (3) has an outlet pipe (43) connected to the first pipeline, an inlet pipe (34) connected to the second pipeline, a water inlet (37), a drain outlet (44), a pressure boosting interface (79), a pressure relief interface (39), a vacuum interface (38), and a temperature transmitter (46); the cavitation module includes a cavitation tank (11), the water inlet (37) is located at the top of the cavitation tank (11); the cavitation tank (11) is located above the stabilizing tank (3) and is connected to the stabilizing tank (3); the drain outlet (44) is located at the bottom of the stabilizing tank (3); the pressure boosting interface (79), the pressure relief interface (39), and the vacuum interface (38) are all located at the bottom of the cavitation tank (3). On the cavitation tank (11), and respectively used to connect with the pressurization module, the pressure relief module and the vacuum module; the temperature transmitter (46) includes a coolant inlet valve (42) and a coolant outlet valve (45) connected to the flow stabilizer (3); the drive motor (1) is electrically connected to the control power supply (21) through the motor driver (20) and is used to drive the liquid delivery device (4); the pressurization module includes a pressurization device (25), a pressure regulating solenoid valve (26) and a pressure regulating manual valve (24), the pressure regulating solenoid valve (26) and the pressure regulating manual valve (24) are set on the gas pipeline for connecting the pressurization device (25) and the cavitation tank (11); The liquid inlet of the liquid conveying device (4) to be tested is connected to the liquid outlet of the flow stabilizing tank (3) through the first pipeline, and the liquid outlet of the liquid conveying device (4) is connected to the liquid inlet of the flow stabilizing tank (3) through the second pipeline. The coarse regulating valve (6) and the fine regulating valve (7) are arranged in parallel on the second pipeline. Furthermore, the liquid inlet of the liquid conveying device (4) is also provided with a bubble outlet for discharging bubbles in the liquid working medium flowing through the first pipeline; the first pipeline includes a eccentric reducer (75), and the installation position of the liquid conveying device (4) is higher than the eccentric reducer (75); the second pipeline includes multiple concentric reducer sections, the diameter of which increases along the flow direction of the liquid working medium; The monitoring device is connected to the control unit and includes a sensing device for monitoring liquid flow rate, liquid temperature, liquid level, gas pressure, and noise at a specified location within the testing system.

2. The liquid conveying device capacity testing system according to claim 1, characterized in that, It also includes a liquid pipeline outlet valve (16) installed on the first pipeline and a liquid pipeline inlet valve (8) installed on the second pipeline.

3. The liquid conveying device capacity testing system according to claim 1, characterized in that, It also includes a filter (15) and / or a transition connection device (17) disposed on the first pipeline.

4. The liquid conveying device capacity testing system according to claim 1, characterized in that, It also includes a coolant inlet valve (10) and a coolant outlet valve (13) respectively installed at the coolant inlet and coolant outlet of the cavitation tank (11).

5. The liquid conveying device capacity testing system according to claim 1, characterized in that, It also includes a liquid manual regulating valve (27) and a liquid electromagnetic regulating valve (28), which are installed on a liquid pipeline for connecting the cavitation tank (11) to an external water inlet.

6. The liquid conveying device capacity testing system according to claim 1, characterized in that, The monitoring device includes a flow meter (5) installed on the second pipeline.

7. The liquid conveying device capacity testing system according to claim 1, characterized in that, The monitoring device includes a stabilizing tank inlet temperature sensor (9) and a stabilizing tank outlet temperature sensor (14) respectively installed at the liquid inlet and liquid outlet of the stabilizing tank (3).

8. The liquid conveying device capacity testing system according to claim 1, characterized in that, The monitoring device includes a level gauge (12) for monitoring the liquid level in the flow stabilizer (3).

9. The liquid conveying device capacity testing system according to claim 1, characterized in that, The monitoring device includes a noise sensor for monitoring the noise generated when the liquid delivery device (4) is in operation.

10. The liquid conveying device capacity testing system according to claim 1, characterized in that, The vacuum module includes a vacuum device (2), a vacuum solenoid regulating valve (23), and a vacuum manual regulating valve (22), which are installed on the gas pipeline for connecting the vacuum device (2) and the cavitation tank (11).

11. The liquid conveying device capacity testing system according to claim 1, characterized in that, The pressure relief module includes a manual exhaust regulating valve (29) and an exhaust solenoid regulating valve (30), which are installed on a gas pipeline for connecting the cavitation tank (11) to the external environment.

12. The liquid conveying device capacity testing system according to claim 1, characterized in that, The control unit is also connected to the control module of at least a portion of the electric or electromagnetic drive equipment in the test system.

13. The liquid conveying device capacity testing system according to claim 1, characterized in that, It also includes a test bench and / or a liquid holding device (70), the liquid conveying device (4) is installed on the test bench and is used at least to collect liquid working medium leaked from the test pipeline, the liquid outlet of the flow stabilizer (3) is connected to the liquid inlet of the liquid conveying device (4) in sequence through a sanitary ball valve (73), a filter (15) and a eccentric reducer (75), the sanitary ball valve (73) and the filter (15) are both installed on the first pipeline; The liquid holding device (70) is provided with a liquid outlet (77), which is connected to the liquid storage tank.

14. A method for testing the capacity of a liquid conveying device, characterized in that, The test method is implemented based on the liquid delivery device capability test system according to any one of claims 1-13, and the test method includes: a. Install the liquid delivery device and drive motor to be tested on the test bench, and inject the liquid working medium into the flow stabilizing tank from the water inlet at the top of the cavitation tank; b. Power on the test system; c. Begin acquiring signals using the monitoring device within the testing system; d. Start operating the pressurization device and all pipeline valves to remove air bubbles from the test pipeline; e. Operate the motor driver to turn on the drive motor; f. Start the test.

15. The method for testing the capacity of a liquid conveying device according to claim 14, characterized in that, Also includes: During the test, the relationship curve between the operating parameters of the liquid conveying device and the flow rate of the liquid working medium was recorded and established. The operating parameters of the liquid conveying device include head, power and efficiency. Alternatively, the liquid conveying device can be operated under set drive motor speed and set liquid working medium flow rate conditions, and a cavitation test can be performed to determine the cavitation characteristics of the liquid conveying device, and obtain the relationship curve between the net positive suction head and the head of the liquid conveying device and the critical cavitation point. Alternatively, a noise detection device can be used to monitor the noise level generated by the liquid conveying device during operation, and a curve showing the relationship between the noise level change and the performance of the liquid conveying device can be established to determine the service life of the liquid conveying device.

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