Turbine pump hydraulic test measurement system and pump characteristic synchronous analysis method

Abstract

The invention relates to a turbine pump hydraulic test measuring system and a pump characteristic synchronous analysis method. The turbine pump hydraulic test measuring system comprises a measuring unit, a conditioning and transmitting unit, a communication unit and a measuring and analyzing platform. The measuring unit is a set of functional hardware capable of converting measured physical quantities into electric signals and is used for front-end sensing measurement of turbine pump hydraulic test parameters. The conditioning and transmitting unit has a multi-channel signal transmitting capability and is used for carrying out real-time acquisition and AD conversion on various electric signals output by the measuring unit and transmitting the converted digital signals in real time through the communication unit; the communication unit realizes information exchange between the conditioning and transmitting unit and the measurement and analysis platform; the measurement and analysis platform is used for meeting the requirements of parameter measurement, display and storage of hydraulic tests of various types of turbopumps and establishment of pump test characteristic models. According to the method, the practical application problems of poor measurement flexibility, low analysis timeliness, high manual dependence and the like of the hydraulic test of the turbopump are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of hydraulic test of turbine pumps and relates to a hydraulic test measurement system for turbine pumps and a synchronous analysis method for pump characteristics. Background Art

[0002] The turbopump is a key component that controls the thrust of liquid rocket engines and the proportion of each propellant component. Before assembling the engine, the turbopump needs to be hydraulically tested. On the one hand, the test verifies the extent to which it meets the design indicators. On the other hand, the test establishes a pump operating characteristic model to further guide the design and adjustment of the pump.

[0003] The hydraulic test of a turbine pump generally uses various sensors to measure process parameters such as medium temperature, pressure, flow, speed, torque, etc. The above parameters are displayed and stored through a customized software platform. After the test, the data is manually post-processed and analyzed to obtain the working characteristics of the pump, and a test report is manually issued. In the above test process, the software platform is customized and developed according to the specific model of the pump. The source program needs to be revised to varying degrees for different types of pump tests, and the measurement flexibility is poor. In addition, the original test process lacks an integrated measurement and analysis platform, the analysis of the test results is time-sensitive, and it relies heavily on manual operations. The accuracy of the test results and test reports cannot be guaranteed. Therefore, how to realize an integrated measurement and analysis method that can meet the hydraulic test needs of various types of pumps and effectively improve the efficiency of pump testing and the accuracy of pump characteristic analysis has become a problem that needs to be solved urgently in this field. Summary of the invention

[0004] The technical problem solved by the present invention is: to overcome the shortcomings of the prior art, to propose a turbine pump hydraulic test measurement system and a pump characteristic synchronous analysis method, to provide complete test measurement and analysis services for liquid rocket engine turbine pump hydraulic tests, and to solve practical application problems such as poor flexibility in turbine pump hydraulic test measurement, low analysis timeliness, and strong manual dependence.

[0005] The technical solution of the present invention is: a turbine pump hydraulic test measurement system, including a measurement unit, a conditioning and transmission unit, a communication unit and a measurement and analysis platform;

[0006] The measuring unit is a set of functional hardware that converts the measured physical quantity into an electrical signal, and is used for front-end sensing measurement of turbine pump hydraulic test parameters. The electrical signal includes voltage, current, and frequency.

[0007] The conditioning and transmission unit has multi-channel signal transmission capability, which is used to collect and convert various electrical signals output from the measuring unit in real time, and transmit the converted digital signals in real time through the communication unit;

[0008] The communication unit realizes the information exchange between the conditioning and transmission unit and the measurement and analysis platform;

[0009] The measurement and analysis platform is used to meet the needs of parameter measurement, display, storage, and pump test characteristic model establishment for hydraulic tests of various types of turbine pumps.

[0010] Furthermore, the measuring unit includes a water temperature sensor, a pump inlet pressure sensor, a pump outlet pressure sensor, an atmospheric pressure sensor, a pump inlet flow sensor, a pump outlet flow sensor, a pump speed sensor and a pump input shaft torque sensor.

[0011] Furthermore, the communication unit adopts an EtherNet switch.

[0012] Furthermore, the measurement and analysis platform includes an industrial computer hardware platform and a full-process analysis module;

[0013] The industrial computer hardware platform is used to establish EtherNet communication with the communication unit and provide an installation environment for the full-process analysis module;

[0014] The full-process analysis module integrates the real-time collection of pump parameters during the pump hydraulic test, the synchronous analysis of pump characteristics, the recording of pump key operating condition test points and the automatic generation of pump test reports. It is implemented based on the LabVIEW development environment. By designing the pump test parameter setting interface, it can simultaneously meet the measurement and analysis needs of hydraulic tests of various types of turbine pumps, improve the versatility of the measurement platform, and reduce the quality risks caused by repeated modifications of the source program.

[0015] Furthermore, the full-process analysis module includes a pump test interactive setting module, a pump parameter real-time measurement and display module, a pump characteristic synchronous analysis module and a pump data storage and report generation module; wherein:

[0016] The pump test interactive setting module is used for flexible setting of test parameters of various pump models and command control of system operation status. The setting parameters are stored in binary files and support the loading function of configuration files.

[0017] The pump parameter real-time measurement and display module is used for multi-channel measured parameter acquisition and display, as well as synchronous calculation of pump characteristic parameters;

[0018] The pump characteristic synchronous analysis module automatically extracts key operating condition test points according to the set parameters, completes the fitting and visual display of the key operating conditions of the pump according to the command signal, issues a pump test characteristic model, and analyzes the rated operating condition characteristics of the pump;

[0019] The pump data storage and report generation module is used for continuous file recording of parameters of the entire test process and for generating test reports of synchronous analysis results of key operating condition test points.

[0020] Furthermore, the pump test interactive setting module includes a pump test parameter setting interface and a pump measurement start and stop control interface; wherein:

[0021] The pump test parameter setting interface is used to realize the flexible setting of test parameters of various types of pumps, including the pump rated speed n e , Rated flow Q e , outlet annular chamber diameter D o , inlet annular chamber diameter D i , medium density ρ, height difference h, key performance condition sequence m is Sequence length, key cavitation condition sequence l is Sequence length, pump parameter sampling rate S; set parameters to be stored in binary files and managed according to pump product models to meet the testing requirements of various models of products;

[0022] The pump measurement start and stop control interface is used for system operation status switching, including operation status switching of continuous storage of measurement parameters and stopping continuous storage.

[0023] Furthermore, the pump parameter real-time measurement and display module includes a pump measured parameter acquisition and display module and a pump characteristic parameter calculation and display module; wherein:

[0024] The pump measured parameter acquisition and display module establishes a communication connection with the conditioning and transmission unit to monitor the water temperature T, pump inlet pressure P in real time. i , Pump outlet pressure P o , atmospheric pressure P, pump inlet flow Q i , Pump outlet flow Q o , pump input shaft speed n, pump input shaft torque N signals are read, processed and displayed;

[0025] The pump characteristic parameter calculation and display module collects the sensor parameter data measured by the display module according to the pump measured parameters, calculates the product pump head Y, power W, efficiency η, NPSH Q characteristics in real time, and maps the calculated real-time characteristic values ​​to the rated working conditions to issue real-time rated flow Real-time rated head Real-time rated power Real-time rated efficiency Real-time rated NPSH Feature information.

[0026] Furthermore, the pump characteristic synchronous analysis module includes a pump key operating condition test point recording module and a pump rated operating condition test point fitting module; wherein:

[0027] The pump key operating condition test point recording module executes the interactive operation instructions of the pump measurement start and stop control interface. When the real-time rated flow is the key performance operating point, that is, When, or when the current pump inlet pressure is the critical cavitation operating point, that is, P i =Y j When the current parameter group is recorded and displayed, a water temperature sequence of key working conditions is formed. Key working condition pump inlet pressure sequence Key working condition pump outlet pressure sequence Atmospheric pressure sequence of key working conditions Pump inlet flow sequence at key working conditions Pump outlet flow sequence under key working conditions Key working condition pump input shaft speed sequence Key working condition pump input shaft torque sequence Rated flow sequence for key conditions Rated lift series for key working conditions Rated power sequence for key operating conditions Rated efficiency sequence of key operating conditions Rated NPSH sequence for key operating conditions

[0028] When the key performance condition sequence set in the pump test parameter setting interface After all the data are collected, the pump rated operating condition test point fitting module extracts the parameter sequence recorded by the pump key operating condition test point recording module, and uses the key operating condition rated flow sequence as the parameter sequence. As the independent variable, The second-order least squares fitting calculation is performed as the dependent variable to produce the product pump head, power, efficiency performance characteristic model, and the pump rated flow Q is obtained through the model. e Characteristics of head Y, power W, and efficiency η under working conditions;

[0029] The pump rated operating condition test point fitting module also has the function of visualizing the pump head, power, and efficiency performance characteristic model. It displays the key operating point test results and the least squares fitting results in scatter plots and curves respectively, and displays the above results in the same two-dimensional graph simultaneously. Intuitive comparative analysis.

[0030] Furthermore, the pump data storage and report generation module includes a full process parameter continuous storage module and a test report automatic generation module; wherein:

[0031] The whole process parameter continuous storage module creates a TDMS data file according to the interactive operation instructions of the pump measurement start and stop control interface, and stores all process parameters T, P i , P o , P, Qi , Q o 、n、N、 Continuously store into TDMS type data file at pump parameter sampling rate S;

[0032] The test report automatic generation module uses the Report Generation Toolkit and NI_Excel class object-oriented programming to generate key operating parameters. The pump head, power, efficiency test characteristic model and the model's visual display results are stored in an Excel report file and a test report is generated;

[0033] The whole process parameter continuous storage module and the test report automatic generation module use independent threads and are executed in parallel and synchronously.

[0034] A method for synchronous analysis of pump characteristics comprises the following steps:

[0035] Step 1: For the current test, set the pump test parameters in the pump test parameter setting interface, or load the binary configuration file. If no operation is performed, the last configuration parameters will be loaded by default.

[0036] Step 2: Poll the pump to measure the start-stop control interface to measure the parameters and continuously store events. If an event occurs, proceed to step 3, otherwise, loop through step 2.

[0037] Step 3: Traverse the key performance condition sequence set in the pump test parameter setting interface in step 1 The current index of the sequence is Index≥m, where m is If the sequence length is equal to , go to step 5; otherwise, go to step 4;

[0038] Step 4: When the pump test parameters set in the current test are key operating points, the pump key operating point recording module records and displays the current operating parameter group, and increments the Index by 1. The pump measured parameter acquisition and display module continuously acquires and displays the sensor measured parameters, and the pump characteristic parameter calculation and display module calculates and displays the pump characteristic parameters in real time. The sensor measured parameters and the pump characteristic calculation parameters are stored in a TDMS data file in real time, and the process returns to step 3.

[0039] Step 5: After the extraction of the key working conditions of the pump test is completed, a new Excel report file is created. Through the pump rated working condition test point fitting module, combined with the key working condition point record array, the pump test characteristic model is established by using the least squares method to fit, and the key working condition parameters, pump test characteristic model, and model visualization results are stored in the Excel report file to form a test report;

[0040] Step 6: Poll the pump measurement start and stop control interface to stop continuous storage events until an event occurs, respond to event requests, stop parameter collection, calculation, display, and storage operations, close the TDMS data file reference, and save the file. A single test is completed.

[0041] The beneficial effects of the present invention compared with the prior art are:

[0042] (1) The present invention is constructed according to the requirements of hydraulic test of liquid rocket engine turbine pump, and can realize real-time collection of pump parameters, synchronous analysis of pump characteristics, and point recording and report generation of key operating points of the pump during the entire test process.

[0043] (2) The present invention integrates the early parameter setting, mid-term parameter collection and calculation, and late parameter processing and report generation of the pump test into the same platform, providing a complete measurement and analysis service for the entire test process, effectively improving the timeliness of the measurement and analysis of the pump hydraulic test.

[0044] (3) The present invention can flexibly record the test point parameters under key working conditions during the pump test process by manual point selection and automatic point selection, establish a pump test characteristic model through least squares fitting and processing analysis, and analyze the pump rated operating condition parameter indicators.

[0045] (4) The present invention designs the pump characteristic calculation into an interactive setting mode, and each function is modularly designed, which has strong portability and can flexibly meet the test measurement and analysis needs of various types of pumps. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a schematic diagram of the composition of the turbine pump hydraulic test measurement system of the present invention;

[0047] Figure 2 It is the schematic diagram of the full-process analysis module composition of the measurement and analysis platform;

[0048] Figure 3 This is a flow chart of the method for hydraulic test measurement of turbine pumps and simultaneous analysis of pump characteristics. DETAILED DESCRIPTION

[0049] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0050] Example 1

[0051] like Figure 1 As shown, a turbine pump hydraulic test measurement system proposed by the present invention includes a measurement unit 1, a conditioning and transmission unit 2, a communication unit 3, and a measurement and analysis platform 4;

[0052] The measuring unit 1 is a set of functional hardware that can convert the measured physical quantity into electrical signals, and is used for front-end sensing measurement of turbine pump hydraulic test parameters. The electrical signals include voltage, current, and frequency. The functional hardware includes a water temperature sensor 11, a pump inlet pressure sensor 12, a pump outlet pressure sensor 13, an atmospheric pressure sensor 14, a pump inlet flow sensor 15, a pump outlet flow sensor 16, a pump speed sensor 17, and a pump input shaft torque sensor 18.

[0053] The conditioning and transmission unit 2 can collect and convert various electrical signals output from the measuring unit 1 in real time, and transmit the converted digital signals in real time through the communication unit 3. In this embodiment, the conditioning and transmission unit 2 has a 16-channel signal transmission capability, and a sampling rate of up to 10 kS / s.

[0054] The communication unit 3 realizes information exchange between the conditioning and transmission unit 2 and the measurement and analysis platform 4. In this embodiment, the communication unit 3 adopts an EtherNet switch.

[0055] The measurement and analysis platform 4 can meet the requirements of parameter measurement, display, storage, and pump test characteristic model establishment for hydraulic tests of various types of turbine pumps.

[0056] The measurement and analysis platform 4 includes an industrial computer hardware platform 41 and a full-process analysis module 42;

[0057] The industrial computer hardware platform 41 is used to establish EtherNet communication with the communication unit 3, and provide an installation environment for the full-process analysis module 42. The full-process analysis module 42 integrates the real-time collection of pump parameters during the pump hydraulic test process, the synchronous analysis of pump characteristics, and the automatic generation of pump test point records and pump test reports under key operating conditions. It is implemented based on the LabVIEW development environment. By designing a pump test parameter setting interface, it is possible to simultaneously meet the measurement and analysis requirements of hydraulic tests of various types of turbine pumps, improve the versatility of the measurement platform, and reduce the quality risks caused by repeated modifications of the source program. The present invention also has a configuration template storage function for the above-mentioned setting parameters, which is managed according to the pump model. It only needs to be configured once in the first test, and then directly loaded into the application.

[0058] In this embodiment, the full process analysis module 42 is designed based on the LabVIEW 2019 version development environment. Figure 2 As shown, it is composed of a pump test interactive setting module 51, a pump parameter real-time measurement and display module 52, a pump characteristic synchronous analysis module 53, and a pump data storage and report generation module 54. Among them:

[0059] The pump test interactive setting module 51 is used for flexible setting of test parameters of various types of pumps and command control of system operation status. The setting parameters can be stored in binary files and support the loading function of configuration files.

[0060] The pump parameter real-time measurement and display module 52 is used for multi-channel measured parameter collection and display, as well as synchronous calculation of pump characteristic parameters.

[0061] The pump characteristic synchronous analysis module 53 can automatically extract key operating condition test points according to the set parameters, complete the fitting and visual display of the key operating conditions of the pump according to the command signal, issue a pump test characteristic model, and analyze the rated operating condition characteristics of the pump.

[0062] The pump data storage and report generation module 54 is used for continuous file recording of parameters of the entire test process and for generating a test report of synchronous analysis results of key operating condition test points.

[0063] Specifically, in this embodiment, the modules 51 to 54 are designed as follows:

[0064] The pump test interactive setting module 51 is composed of a pump test parameter setting interface 511 and a pump measurement start and stop control interface 512. The pump test parameter setting interface 511 is used to realize the flexible setting of test parameters of various types of pumps, including the pump rated speed n e , Rated flow Q e , outlet annular chamber diameter D o , inlet annular chamber diameter D i , medium density ρ, height difference h, key performance condition sequence m is Sequence length, key cavitation condition sequence l is Sequence length, pump parameter sampling rate S. The above interfaces are reserved through the LabVIEW front panel window and can be flexibly set. The setting parameters are stored in binary files and managed according to the pump product model, which can flexibly meet the testing requirements of various models of products. The pump measurement start and stop control interface 512 is used for system operation state switching, including the switching of operation states such as continuous storage of measurement parameters and stopping continuous storage.

[0065] The pump parameter real-time measurement and display module 52, while realizing multi-channel measured parameter collection, also has the function of synchronous calculation of pump characteristic parameters, and is composed of a pump measured parameter collection and display module 521 and a pump characteristic parameter calculation and display module 522. The pump measured parameter collection and display module 521 establishes a communication connection with the conditioning and transmission unit 2, and real-timely measures the water temperature T, the pump inlet pressure P i , Pump outlet pressure P o , atmospheric pressure P, pump inlet flow Q i , Pump outlet flow Q o, pump input shaft speed n, pump input shaft torque N signals are read, processed and displayed. The pump characteristic parameter calculation and display module 522 calculates the product pump head Y, power W, efficiency η, cavitation margin Q characteristics in real time based on the sensor parameter data measured by the pump measured parameter collection and display module 521, and maps the calculated real-time characteristic values ​​to the rated working conditions to issue a real-time rated flow rate Real-time rated head Real-time rated power Real-time rated efficiency Real-time rated NPSH Feature information.

[0066] The pump characteristic synchronous analysis module 53 is composed of a pump key operating condition test point recording module 531 and a pump rated operating condition test point fitting module 532. The pump key operating condition test point recording module 531 executes the interactive operation instructions of the pump measurement start and stop control interface 512. When the real-time rated flow is the key performance operating point Or when the current pump inlet pressure is at the critical cavitation operating point (P i =Y j ), the platform records and displays the current parameter group to form a water temperature sequence for key working conditions Key working condition pump inlet pressure sequence Key working condition pump outlet pressure sequence Atmospheric pressure sequence of key working conditions Pump inlet flow sequence at key working conditions Pump outlet flow sequence under key working conditions Key working condition pump input shaft speed sequence Key working condition pump input shaft torque sequence Rated flow sequence for key conditions Rated lift series for key working conditions Rated power sequence for key operating conditions Rated efficiency sequence of key operating conditions Rated NPSH sequence for key operating conditions When the key performance condition sequence set in the pump test parameter setting interface 511 After all the data are collected, the pump rated operating condition test point fitting module 532 extracts the parameter sequence recorded by the pump key operating condition test point recording module 531, and uses the key operating condition rated flow sequence as the parameter sequence. As the independent variable, The second-order least squares fitting calculation is performed as the dependent variable to produce the product pump head, power, efficiency performance characteristic model, and the pump rated flow Q is obtained through the model. eThe pump rated operating condition test point fitting module 532 also has the function of visualizing the pump head, power, and efficiency performance characteristic model, and displays the key operating point test results and the least squares fitting results in scatter plots and curves respectively, and displays the above results in the same two-dimensional graph simultaneously, combined with the key performance operating condition sequence Intuitive comparative analysis.

[0067] The pump data storage and report generation module 54 is used for file recording of pump test parameters, including a full process parameter continuous storage module 541 and a test report automatic generation module 542. The full process parameter continuous storage module 541 creates a TDMS type data file according to the interactive operation instructions of the pump measurement start and stop control interface 512, and stores all process parameters T, P i , P o , P, Q i , Q o 、n、N、 The pump parameter sampling rate S is continuously stored in a TDMS data file. The TDMS data file is a binary storage file format introduced by NI, which occupies a small amount of memory and has a fast data reading and writing speed. It can well meet the real-time data storage requirements of the pump test with a high sampling rate. The test report automatic generation module 542 uses the Report Generation Toolkit toolkit and the NI_Excel class object-oriented programming method to store key operating condition parameters. The pump head, power, efficiency test characteristic model and the model's visual display results are stored in an Excel report file and form a test report. The whole process parameter continuous storage module 541 and the test report automatic generation module 542 use independent threads and can be executed in parallel and synchronously.

[0068] Based on the turbine pump hydraulic test measurement system of the present invention, Figure 3 As shown, the steps of the method for performing hydraulic test measurement of a turbine pump and synchronous analysis of pump characteristics include:

[0069] Step 1: For the current test, set the pump test parameters in the pump test parameter setting interface 511, or load the binary configuration file. If no operation is performed, the last configuration parameters are loaded by default.

[0070] Step 2: Poll the pump to measure the start and stop control interface 512 to measure the parameters and store the event continuously. If the event occurs, proceed to step 3, otherwise, execute step 2 in a loop.

[0071] Step 3: Traverse the key performance condition sequence set in step 1 pump test parameter setting interface 511 The current index of the sequence Index≥m (m is sequence length), go to step 5; otherwise, go to step 4.

[0072] Step 4: When the pump test parameters of the current test setting are key operating points, the pump key operating test point recording module 531 records and displays the current operating parameter group, and sets Index = Index + 1. The pump measured parameter acquisition and display module 521 continuously acquires and displays the sensor measured parameters; the pump characteristic parameter calculation and display module 522 calculates and displays the pump characteristic parameters in real time. The above sensor measured parameters and pump characteristic calculation parameters are stored in a TDMS data file in real time. Return to execute step 3.

[0073] Step 5: After the key operating conditions of the pump test are extracted, a new Excel report file is created. Through the pump rated operating condition test point fitting module 532, combined with the key operating condition point record array, the pump test characteristic model is established using the least squares fitting method, and the key operating condition parameters, pump test characteristic model, and model visualization results are stored in the Excel report file to form a test report.

[0074] Step 6: Polling pump measurement start and stop control interface 512 stops continuous storage of events until an event occurs, responds to event requests, stops parameter acquisition, calculation, display, and storage operations, closes TDMS data file reference, saves the file, and completes a single test.

[0075] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

[0076] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A turbine pump hydraulic test measurement system, characterized in that: It comprises a measuring unit (1), a conditioning and transmitting unit (2), a communication unit (3) and a measuring and analyzing platform (4); The measuring unit (1) is a set of functional hardware that converts the measured physical quantity into an electrical signal, and is used for front-end sensing measurement of turbine pump hydraulic test parameters, wherein the electrical signal includes voltage, current, and frequency; The conditioning and transmission unit (2) has a multi-channel signal transmission capability and is used to collect and perform AD conversion on various electrical signals output from the measuring unit (1) in real time, and transmit the converted digital signals in real time through the communication unit (3); The communication unit (3) realizes information exchange between the conditioning and transmission unit (2) and the measurement and analysis platform (4); The measurement and analysis platform (4) is used to meet the requirements of parameter measurement, display, storage, and pump test characteristic model establishment for hydraulic tests of various types of turbine pumps.

2. A turbine pump hydraulic test measurement system according to claim 1, characterized in that: The measuring unit (1) comprises a water temperature sensor (11), a pump inlet pressure sensor (12), a pump outlet pressure sensor (13), an atmospheric pressure sensor (14), a pump inlet flow sensor (15), a pump outlet flow sensor (16), a pump speed sensor (17) and a pump input shaft torque sensor (18).

3. A turbine pump hydraulic test and measurement system according to claim 1, characterized in that: The communication unit (3) uses an EtherNet switch.

4. A turbine pump hydraulic test and measurement system according to claim 3, characterized in that: The measurement and analysis platform (4) includes an industrial computer hardware platform (41) and a full-process analysis module (42); The industrial computer hardware platform (41) is used to establish EtherNet communication with the communication unit (3) and provide an installation environment for the full-process analysis module (42); The full-process analysis module (42) integrates the real-time collection of pump parameters during the pump hydraulic test process, the synchronous analysis of pump characteristics, the recording of pump key operating condition test points and the automatic generation of pump test reports. It is implemented based on the LabVIEW development environment and, by designing a pump test parameter setting interface, can simultaneously meet the measurement and analysis requirements of hydraulic tests of various types of turbine pumps, thereby improving the versatility of the measurement platform and reducing the quality risks caused by repeated modifications of the source program.

5. A turbine pump hydraulic test and measurement system according to claim 4, characterized in that: The full-process analysis module (42) includes a pump test interactive setting module (51), a pump parameter real-time measurement and display module (52), a pump characteristic synchronous analysis module (53) and a pump data storage and report generation module (54); wherein: The pump test interactive setting module (51) is used for flexible setting of test parameters of various types of pumps and command control of system operation status, and the setting parameters are stored in a binary file, supporting the loading function of the configuration file; The pump parameter real-time measurement and display module (52) is used for multi-channel measured parameter collection and display, as well as synchronous calculation of pump characteristic parameters; The pump characteristic synchronous analysis module (53) automatically extracts key operating condition test points according to the set parameters, completes the fitting and visual display of the pump key operating conditions according to the command signal, issues a pump test characteristic model, and analyzes the pump rated operating condition characteristics; The pump data storage and report generation module (54) is used for continuous file recording of parameters of the entire test process and for generating a test report of synchronous analysis results of key operating condition test points.

6. A turbine pump hydraulic test and measurement system according to claim 5, characterized in that: The pump test interactive setting module (51) comprises a pump test parameter setting interface (511) and a pump measurement start and stop control interface (512); wherein: The pump test parameter setting interface (511) is used to realize the flexible setting of test parameters of various types of pumps, including the pump rated speed n e , Rated flow Q e , outlet annular chamber diameter D o , inlet annular chamber diameter D i , medium density ρ, height difference h, key performance condition sequence m is Sequence length, key cavitation condition sequence l is Sequence length, pump parameter sampling rate S; set parameters to be stored in binary files and managed according to pump product models to meet the testing requirements of various models of products; The pump measurement start and stop control interface (512) is used for system operation state switching, including operation state switching of continuous storage of measurement parameters and stopping continuous storage.

7. A turbine pump hydraulic test and measurement system according to claim 6, characterized in that: The pump parameter real-time measurement and display module (52) comprises a pump measured parameter acquisition and display module (521) and a pump characteristic parameter calculation and display module (522); wherein: The pump measured parameter acquisition and display module (521) establishes a communication connection with the conditioning and transmission unit (2) to monitor the water temperature T, the pump inlet pressure P in real time. i , Pump outlet pressure P o , atmospheric pressure P, pump inlet flow Q i , Pump outlet flow Q o , pump input shaft speed n, pump input shaft torque N signals are read, processed and displayed; The pump characteristic parameter calculation and display module (522) calculates the product pump head Y, power W, efficiency η, cavitation margin Q characteristics in real time based on the sensor parameter data measured by the pump measured parameter collection and display module (521), and maps the calculated real-time characteristic values ​​to the rated working conditions to issue a real-time rated flow rate. Real-time rated head Real-time rated power Real-time rated efficiency Real-time rated NPSH Feature information.

8. A turbine pump hydraulic test and measurement system according to claim 7, characterized in that: The pump characteristic synchronous analysis module (53) comprises a pump key operating condition test point recording module (531) and a pump rated operating condition test point fitting module (532); wherein: The pump key operating condition test point recording module (531) executes the interactive operation instruction of the pump measurement start and stop control interface (512), when the real-time rated flow is the key performance operating point, that is, When, or when the current pump inlet pressure is the critical cavitation operating point, that is, P i =Y j When the current parameter group is recorded and displayed, a water temperature sequence of key working conditions is formed. Key working condition pump inlet pressure sequence Key working condition pump outlet pressure sequence Atmospheric pressure sequence of key working conditions Pump inlet flow sequence at key working conditions Pump outlet flow sequence under key working conditions Key working condition pump input shaft speed sequence Key working condition pump input shaft torque sequence Rated flow sequence for key conditions Rated lift series for key working conditions Rated power sequence for key operating conditions Rated efficiency sequence of key operating conditions Rated NPSH sequence for key operating conditions When the key performance condition sequence set in the pump test parameter setting interface (511) After all the data are collected, the pump rated operating condition test point fitting module (532) extracts the parameter sequence recorded by the pump key operating condition test point recording module (531) and uses the key operating condition rated flow sequence as the parameter sequence. As the independent variable, The second-order least squares fitting calculation is performed as the dependent variable to produce the product pump head, power, efficiency performance characteristic model, and the pump rated flow Q is obtained through the model. e Characteristics of head Y, power W, and efficiency η under working conditions; The pump rated operating condition test point fitting module (532) also has the function of visualizing the pump head, power, and efficiency performance characteristic model, and displays the key operating condition test results and the least square fitting results in a scatter plot and a curve graph respectively, and displays the above results in the same two-dimensional graph simultaneously, combining the key performance condition sequence Intuitive comparative analysis.

9. A turbine pump hydraulic test and measurement system according to claim 8, characterized in that: The pump data storage and report generation module (54) comprises a whole process parameter continuous storage module (541) and a test report automatic generation module (542); wherein: The whole process parameter continuous storage module (541) creates a TDMS data file according to the interactive operation instruction of the pump measurement start and stop control interface (512), and stores all process parameters T, P i , P o , P, Q i , Q o 、n、N、 Continuously store into TDMS type data file at pump parameter sampling rate S; The test report automatic generation module (542) uses the Report Generation Toolkit and the NI_Excel class object-oriented programming method to generate key operating parameters. The pump head, power, efficiency test characteristic model and the model's visual display results are stored in an Excel report file and a test report is generated; The whole process parameter continuous storage module (541) and the test report automatic generation module (542) use independent threads and are executed in parallel and synchronously.

10. A method for synchronous analysis of pump characteristics based on the system according to any one of claims 8 to 9, characterized in that: The following steps are involved: Step 1: For the current test, set the pump test parameters in the pump test parameter setting interface (511), or load the binary configuration file. If no operation is performed, the last configuration parameters are loaded by default; Step 2: polling the pump to measure the start and stop control interface (512) to measure the parameters and continuously store the event. If the event occurs, proceed to step 3, otherwise, loop through step 2. Step 3: Traverse the key performance condition sequence set in the pump test parameter setting interface (511) of step 1 The current index of the sequence is Index≥m, where m is When the sequence length is , go to step 5; Otherwise, proceed to step 4; Step 4: When the pump test parameters set in the current test are key operating points, the pump key operating point recording module (531) records and displays the current operating parameter group, and increments the Index by 1. The pump measured parameter acquisition and display module (521) continuously acquires and displays the sensor measured parameters, and the pump characteristic parameter calculation and display module (522) calculates and displays the pump characteristic parameters in real time, and stores the sensor measured parameters and the pump characteristic calculation parameters in real time in a TDMS data file, and returns to execute step 3; Step 5: After the extraction of the key working conditions of the pump test is completed, a new Excel report file is created, and the pump test characteristic model is established by using the least squares method to fit the pump rated working condition test point fitting module (532) in combination with the key working condition point record array, and the key working condition parameters, the pump test characteristic model, and the model visualization results are stored in the Excel report file to form a test report; Step 6: Polling the pump measurement start and stop control interface (512) to stop the continuous storage of events until an event occurs, respond to the event request, stop parameter collection, calculation, display, and storage operations, close the TDMS data file reference, and save the file. The single test is completed.

Images