A comprehensive test and evaluation method for installation reliability of hydraulic pumps and motors

Abstract

This invention discloses a comprehensive testing and evaluation method for the installed reliability of hydraulic pumps and motors, comprising three main steps: typical working condition simulation testing, in-plant mainframe integration testing, and on-site application testing and reliability assessment. The comprehensive testing and evaluation method for the installed reliability of hydraulic pumps and motors provided by this invention fully considers complex and harsh construction conditions. Through typical working condition simulation testing, it avoids the high risks, frequent unexpected situations, and high costs associated with direct on-site application testing. Simultaneously, the in-plant mainframe integration testing ensures the compatibility of the hydraulic pumps and motors with the mainframe installation environment. Finally, the on-site application testing and reliability assessment improve upon the lack of comprehensive reliability assessment standards for hydraulic pumps and motors in industrial applications.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic component testing, and in particular to a method for comprehensive testing and evaluating the installed reliability of a hydraulic pump and a motor. Background Art

[0002] The hydraulic pump and motor are the core power source and actuator in the hydraulic system respectively. The performance of the two directly affects the overall operation of the hydraulic system. Therefore, it is necessary to comprehensively evaluate the installation reliability of the hydraulic pump and motor through testing methods.

[0003] In the prior art, there are some hydraulic pump and motor performance test systems, test platforms or test data processing methods. However, these prior arts only test the performance parameters of hydraulic components, and do not conduct comprehensive test and evaluation of hydraulic pumps and motors in combination with the host environment and complex application conditions. Host products used in complex working conditions have higher requirements for the installation reliability of hydraulic pumps and motors. Therefore, the existing test and evaluation methods in the prior art are difficult to guarantee the installation reliability of hydraulic pumps and motors used in complex working conditions. Summary of the invention

[0004] In view of this, the present invention provides a comprehensive test and evaluation method for the installation reliability of hydraulic pumps and motors, so as to improve the installation reliability of hydraulic pumps and motors used in complex working conditions.

[0005] In order to achieve the above object, the present invention provides a method for comprehensive testing and evaluation of the installation reliability of a hydraulic pump and a motor, comprising the following steps:

[0006] Step 100: Typical working condition simulation test;

[0007] Test the performance parameters of hydraulic pumps and motors based on simulated load conditions equivalent to typical operating conditions to preliminarily evaluate the performance of hydraulic pumps and motors;

[0008] Step 200: Host loading test in the factory;

[0009] Based on the data obtained in step 100, the performance parameters of the hydraulic pump and the motor when mounted on the main engine in the factory are tested to evaluate the performance of the hydraulic pump and the motor when mounted on the main engine in the factory;

[0010] Step 300: Construction site application test and reliability assessment;

[0011] Based on the various data obtained in step 100 and step 200, a test method for an actual construction site application scenario is determined, and a comprehensive evaluation of the installed reliability of the hydraulic pump and the motor is performed based on the test data obtained by implementing the test method.

[0012] Furthermore, the performance parameters described in step 100 include: the speed and torque of the hydraulic pump, the pressure, flow rate and oil temperature of the inlet and outlet oil of the hydraulic pump; the speed and torque of the motor, the pressure, flow rate and oil temperature of the inlet and outlet oil of the motor.

[0013] Furthermore, according to the performance parameters described in step 100, the pressure and flow driving characteristics of the hydraulic pump and the motor are analyzed and obtained.

[0014] Furthermore, according to the performance parameters described in step 100, the changing rules of the speed, torque and efficiency of the hydraulic pump and the changing rules of the speed, torque and efficiency of the motor are analyzed and obtained.

[0015] Furthermore, in step 200, before testing the performance parameters of the hydraulic pump and the motor when mounted on the main engine in the factory, the following steps are included:

[0016] Design the transition interface between the hydraulic pump and the motor according to the selected working environment;

[0017] Standardize the assembly process of hydraulic pumps, motors and main engines according to the selected working conditions.

[0018] Furthermore, the performance parameters described in step 200 include:

[0019] No-load displacement, volumetric efficiency, overall efficiency, starting efficiency, low-speed performance, sealing performance, leakage and variable characteristics of a single motor;

[0020] Dynamic response, variable hysteresis, torque and load matching, and pressure and flow drive consistency during multi-motor synchronization.

[0021] Further, in step 300, the testing method includes:

[0022] According to the performance parameters obtained by the test in step 100 and step 200, and the parameter characteristics obtained by the analysis, the sensitive parameters of the performance of the hydraulic pump and the motor are determined, the sensitive parameters are used as the key monitoring parameters in the actual construction site application evaluation, and the sampling rate is determined;

[0023] Arrange sensors according to the parameters to be monitored and collect data;

[0024] The collected data are processed and analyzed to obtain the degradation characteristics of the installed performance indicators of the hydraulic pump and motor.

[0025] Furthermore, the collected data is processed and analyzed, including the following steps:

[0026] Filter and reduce noise on the collected data to extract key data;

[0027] For all data in the complete sampling period, invalid data is filtered out;

[0028] Carry out curve fitting and comparative analysis on the extracted key data and valid data;

[0029] Based on the curve fitting and comparative analysis, the key sensitive parameters of the performance changes of hydraulic pumps and motors are further extracted;

[0030] Analyze the time-varying patterns of key sensitive parameters of hydraulic pumps and motors;

[0031] The performance degradation curves of hydraulic pumps and motors are drawn according to the changing patterns of key sensitive parameters over time, and the degradation characteristics of the installed performance indicators of hydraulic pumps and motors are obtained through analysis.

[0032] The present invention has at least the following beneficial effects:

[0033] Compared with the national standard test of hydraulic pumps and motors on standard test benches in the prior art, the installation reliability test and evaluation method of hydraulic pumps and motors provided by the present invention is a test and evaluation method for installation application. The method provided by the present invention is designed with full consideration of complex and harsh installation application conditions, connecting three aspects of typical working condition simulation test, in-factory host loading test and construction site application test, providing comprehensive and reliable test and evaluation results for hydraulic pumps and motors with high performance requirements, and providing important technical support for the design, development, optimization and upgrading, and performance evaluation of hydraulic pumps and motors.

[0034] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The invention will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A flow chart of a method for testing and evaluating the installation reliability of a hydraulic pump and a motor provided by an embodiment of the present invention;

[0037] Figure 2 A structural diagram of a large-displacement hydraulic pump and motor multi-operating-condition load simulation test system provided by an embodiment of the present invention;

[0038] Figure 3 A flow chart of a drive consistency test and evaluation method for a motor mounted on a host provided by an embodiment of the present invention;

[0039] exist Figure 2 middle:

[0040] Numbers 8 and 10 refer to the motor pump unit;

[0041] Numbers 2, 23, 31, and 48 refer to relief valves;

[0042] Numbers 1, 3, 22, 24, and 25 refer to two-position three-way solenoid reversing valves;

[0043] Numbers 4 and 7 refer to one-way valves;

[0044] Numbers 5, 11, 14, and 41 refer to flow sensors;

[0045] Numbers 34, 36, 45, and 47 refer to pressure sensors;

[0046] Numbers 12, 15, 38, 40, 43, and 49 refer to temperature sensors;

[0047] Numbers 6 and 13 refer to filters;

[0048] Number 9 refers to the fuel tank;

[0049] Numbers 17, 18, 19, 20, 21, 27, 28, 30, 33, 35, 50, 51, 52, 53 refer to two-way cartridge valves;

[0050] Numbers 29, 37, and 46 refer to ball valves;

[0051] Numbers 16 and 26 refer to electromagnetic ball valves;

[0052] No. 32 refers to the high-frequency response electric proportional relief valve;

[0053] Number 42 refers to the torque and speed sensor;

[0054] No. 44 refers to the motor under test or the driving motor;

[0055] Number 39 refers to the loading pump or the pump being tested. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. It should be understood that the drawings in the present invention are only for the purpose of illustration and description and are not used to limit the protection scope of the present invention. In addition, it should be understood that the schematic drawings are not drawn according to the actual scale.

[0057] See also Figure 1The embodiment of the present invention provides a comprehensive test and evaluation method for the installation reliability of a hydraulic pump and a motor, comprising the following steps:

[0058] Step 100: Typical working condition simulation evaluation:

[0059] Based on simulated load conditions equivalent to typical working conditions, the performance parameters of hydraulic pumps and motors are tested to preliminarily evaluate the performance of hydraulic pumps and motors.

[0060] Taking the tunnel construction environment of underground engineering equipment as an example, the construction conditions are complex and harsh. If the hydraulic pump and motor are directly subjected to industrial application tests, there will be high risks, high costs and many emergencies. Therefore, in the embodiment of the present invention, a typical working condition simulation evaluation step is proposed. By equivalently simulating the load conditions of typical working conditions and testing the performance parameters of the hydraulic pump and motor, the performance of the hydraulic pump and motor is preliminarily evaluated, thereby reducing the trial and error cost of industrial application testing.

[0061] Specifically, in this embodiment, the typical working condition simulation test includes the following steps:

[0062] Step 101, collecting construction site data: collecting and arranging typical working condition cases of the host product on the construction site, collecting performance parameters of the hydraulic pump and motor under typical working conditions, specifically, such as motor A / B port pressure, A / B port pressure difference, A / B port flow, output shaft torque, rotation angle and speed, oil temperature and other parameters;

[0063] Step 102, analyzing measured data: classifying and sorting the collected construction site data and analyzing the data characteristics;

[0064] Step 103, extracting typical working condition characteristics: extracting the change characteristics of the above parameters such as pressure and flow under different load sizes and different load changes, so as to simulate the load changes of typical working conditions;

[0065] Step 104, overflow loading: using an overflow loading test method in combination with an electro-hydraulic proportional control method to simulate load changes under typical operating conditions of the host;

[0066] Step 105, oil temperature control: In order to reduce the influence of oil temperature on the test, this embodiment also designs a test bench oil tank temperature adjustment module to keep the oil temperature always within a certain range to ensure the test accuracy;

[0067] Step 106, load simulation test: a load simulation test is performed on the test bench. During the test, the load size is adjusted by adjusting the displacement of the variable pump of the test bench and the control current size of the proportional relief valve;

[0068] Step 107, test data collection: collect the operating parameters of the tested hydraulic pump and motor, specifically, such as the flow rate and pressure of the motor inlet and outlet oil, speed torque, and oil temperature;

[0069] Step 108, analyzing pressure and flow driving characteristics: analyzing the collected pressure and flow characteristic parameters, analyzing the driving characteristics of the hydraulic pump and motor, and preliminarily evaluating their performance to provide a basis for site application test evaluation;

[0070] Step 109, analyzing the changing patterns of torque, speed, and efficiency: analyzing the changing patterns of the collected characteristic parameters such as torque, speed, and efficiency, preliminarily evaluating the performance of the hydraulic pump and motor, and providing a basis for the on-site application test evaluation.

[0071] Please refer to Figure 2 In order to better meet the needs of typical working condition simulation test proposed in the embodiment of the present invention, the embodiment of the present invention also provides a large-displacement hydraulic pump and motor multi-working condition load simulation test system, the main structure of which includes: the main components include: a motor pump group (8, 10), a relief valve (2, 23, 31, 48), a two-position three-way electromagnetic reversing valve (1, 3, 22, 24, 25), a one-way valve (4, 7), a flow sensor (5, 11, 14, 41), a pressure sensor (34, 36, 45, 47), a temperature sensor Sensors (12, 15, 34, 38, 40, 43, 49), filters (6, 13), oil tanks (9), ball valves (29, 37, 46), two-way cartridge valves (17, 18, 19, 20, 21, 27, 28, 30, 33, 35, 50, 51, 52, 53), electromagnetic ball valves (16, 26), high-frequency response electric proportional relief valves (32), ball valves (37, 46), torque and speed sensors (42), motors to be tested or drive motors (44), and loading pumps or pumps to be tested (39).

[0072] The motor 44 under test is connected to the loading pump 39 through a coupling, and a torque and speed sensor 42 is installed on the coupling. The A port of the motor 44 under test is arranged with a temperature sensor 43 and a pressure sensor 47, the B port is arranged with a temperature sensor 49 and a pressure sensor 45, and a ball valve 46 is installed on the pipeline connecting the A / B ports. Similarly, the P / T port of the loading pump (the A / B port when a bidirectional variable pump is installed) has the same configuration. A motor-side reversing valve group is arranged between the motor 44 under test and the flow sensor 5, and the valve group consists of two-way cartridge valves 50, 51, 52, 53, two-position three-way solenoid reversing valves 1, 3, overflow valves 2, 48 and a check valve 4. A check valve 7 and a filter 6 are also arranged between the variable displacement motor pump group 8 and the flow sensor 5. A loading valve group and a pump-side reversing valve group are installed between the loading motor and the flow sensor 14, wherein the loading valve group is composed of two-way cartridge valves 27, 28, 30, 33, 35, a relief valve 31 and a high-frequency response proportional relief valve 32; the pump-side reversing valve group is composed of two-way cartridge valves 17, 18, 19, 20, 21, a relief valve 23, and two-position three-way reversing valves 22, 25, 26. In addition, electromagnetic ball valves 16 and 26 are arranged on the pipeline between the loading pump and the pump-side reversing valve group. A filter 13 is installed between the series pump motor pump group 10 and the flow sensor 14. Flow sensors 11, temperature sensors 12, flow sensors 41, and temperature sensors 15 are arranged on the oil drain pipeline between the oil drain ports of the motor 44 and the loading pump 39 under test and the oil tank, respectively. A ball valve 29 is installed on the return oil pipeline of the loading valve group.

[0073] When testing a large displacement motor, the motor to be tested is installed on the motor side, and a mature model loading pump with matching displacement, speed and other parameters is installed on the pump side. Before the test, close ball valves 46 and 37, open ball valve 29, and adjust relief valves 2, 23, 31, and 48 to appropriate pressure values. At the beginning of the test, under the condition that the two-position three-way solenoid reversing valves 1, 22, 25 and the solenoid ball valve 26 are energized and the oil circuit is unobstructed, considering the limited oil suction capacity of the pump, the series pump motor pump group 10 is started first. At this time, the oil in the pipeline on the loading pump side passes through the filter 13 and the flow sensor 14 and then enters the pump side reversing valve group. Since the two-position three-way solenoid reversing valve 24 in the pump side reversing valve group is not energized and 25 is energized, the control oil drawn from the oil inlet pipeline prevents the two-way cartridge valves 18 and 20 from opening, while the two-way cartridge valves 17 and 21 can be opened. At this time, the oil in the main oil circuit passes through the two-way cartridge valve 17 and the solenoid ball valve 16 (not energized) and reaches the suction port P of the loading pump 39. When the pressure rises to a certain level, the relief valve 23 opens, causing the two-way cartridge valve 19 to open, and part of the oil flows back to the oil tank through the valve, and the system pressure is controlled. After starting the series motor pump group 10, the variable pump motor pump group 8 is started with the minimum displacement. At this time, since the two-position three-way reversing valve 1 is energized and 3 is not energized, the oil flowing out of the variable pump passes through the check valve 7, the filter 6 and the flow sensor 5 and then enters the motor side reversing valve group. The two-way cartridge valves 50 and 51 in the valve group are always kept closed under the action of the control oil led from the main oil circuit. The oil in the main oil circuit reaches the B port of the motor 44 under test through the two-way cartridge valve 53, driving the motor to rotate clockwise. Gradually increasing the displacement of the variable pump will increase the motor speed. The low-pressure oil flowing out of the A port of the motor under test will flow back to the oil tank through the two-way cartridge valve 52. After the motor 44 under test starts to rotate, it will drive the loading pump 39 to rotate together through the coupling. The loading pump 39 will suck oil from the P port and discharge it from the T port after pressurization. Since the electromagnetic ball valve 26 is powered and closed, the oil will enter the loading valve group and pass through the two-way cartridge valve 28. By adjusting the set value of the high-frequency response proportional relief valve 32, the pressure of the pilot oil of the two-way cartridge valve 30 can be controlled, and then the pressure of the main valve port can be adjusted to achieve load simulation. When the motor under test is reversed, the two-position three-way reversing valves 3, 22, and 24 are energized while 1 and 25 are not energized, and at the same time, the electromagnetic ball valve 16 is energized while 26 is not energized.

[0074] In this process, the oil flow rate flowing through the motor 44 under test, the pressure and temperature of the oil at the A / B ports, and the flow rate and temperature of the leaked oil can be monitored and recorded by flow sensors 5, 11, pressure sensors 45, 47, and temperature sensors 43, 49, 12, respectively. At the same time, according to the oil temperature and pressure data collected by the load pump outlet sensor, combined with the torque and speed sensor readings, it is convenient to conduct a comprehensive analysis of the operation of the motor under loading conditions. The control method of the high-frequency response proportional relief valve can be used to load the load fitting curve collected on site to simulate the continuously changing load under the specific use environment.

[0075] When testing a bidirectional variable pump, the pump to be tested (which can be a large displacement pump of different types) is installed on the pump side, and a mature model drive motor with matching displacement, speed and other parameters is installed on the motor side. The test process is basically the same as when testing the motor. Similarly, the change of the pump outlet load is simulated by adjusting the opening of the high-frequency response proportional relief valve. Whether the oil needs to be reversed can be determined according to the type of the pump to be tested.

[0076] During the installation and replacement of the pump and motor, open the ball valves 37 and 46 to make the pressure on both sides of the component equal, which can facilitate the installation of the component shaft and coupling. The overflow valves 2 and 48 are safety valves. When the tandem pump motor pump unit 10 does not supply enough oil to the loading pump 39, the ball valve 29 can be closed. At this time, the oil in the return oil pipeline will be supplemented to the pump suction port through the two-way cartridge valve 33 or 35 to prevent underflow.

[0077] The large-displacement hydraulic pump and motor multi-condition load simulation test system provided by the embodiment of the present invention adopts a motor-driven pump and a loading method on the pump side, combined with a double reversing valve group on the pump side and the motor side, so that it can simultaneously meet the bidirectional rotation loading test of the large-displacement pump and the motor. At the same time, the use of a large-displacement variable pump for oil supply broadens the applicable specification range of the tested component, thereby effectively improving the comprehensive testing capability of the test system. In addition, the extensive arrangement of various types of sensors can quickly and effectively monitor and collect parameters such as flow, pressure, temperature, speed, torque, etc., which is convenient for testers to conduct a comprehensive analysis of the working conditions of the tested components. On the other hand, using a high-frequency response proportional overflow valve as a loading device can not only simulate a constant load, but also simulate a continuously changing load condition similar to the actual use environment after combining the load change curve measured on site, so that the test items are richer and the results are closer to the actual situation.

[0078] Please combine Figure 1 and Figure 3The present embodiment provides a method for comprehensive testing and evaluating the reliability of hydraulic pumps and motors installed. After completing step 100 and the typical working condition simulation test, in order to ensure the matching of the hydraulic pumps and motors with the host installation environment (such as the connection interface and assembly process, etc.), the present embodiment further provides a method for testing the parameters and performance of the hydraulic pumps and motors installed in the host equipment in a factory (step 200).

[0079] like Figure 1 As shown, step 200 specifically includes the following steps:

[0080] Step 201, designing the connection interface: under harsh working conditions, the hydraulic pump and motor drive interface are prone to failure. To ensure the reliability of the test, the transition connection interface of the hydraulic pump and the motor should be reasonably designed;

[0081] Step 202, standardizing the assembly process: standardizing the assembly process to avoid affecting the test results due to assembly problems;

[0082] Step 203, extracting typical working condition load data: Based on steps 103 and 106 in the typical working condition simulation test, extract load simulation data, load the hydraulic pump and motor mounted on the main engine through overflow loading and electro-hydraulic proportional control, and test the performance of the hydraulic pump and motor mounted on the main engine in the factory;

[0083] Step 204, testing the host performance: Specifically, when multiple motors are simultaneously mounted on the host, the performance test is as follows: Figure 3 As shown, firstly, the multiple motors are tested individually, including the motor's no-load displacement, volumetric efficiency, total efficiency, starting efficiency, low-speed performance, sealing performance, leakage and variable characteristics. After completing the individual tests, further multi-motor synchronous loading tests are carried out, including dynamic response, variable hysteresis, torque and load matching, pressure and flow drive consistency, so as to complete the multi-motor drive consistency evaluation.

[0084] Step 205 Performance evaluation: Evaluate the performance of the hydraulic pump and motor mounted on the main engine through comparative analysis of test data.

[0085] After completing the in-factory host installation test in step 200, in order to address the problem of imperfect reliability assessment standards for hydraulic pumps and motors in installed industrial applications, the embodiment of the present invention further proposes an on-site test method for evaluating the installed reliability of hydraulic pumps and motors (step 300), by testing the key installed performance of hydraulic pumps and motors under strong interference, large vibration and periodic operation conditions, and analyzing the changing characteristics of parameter indicators with operating time.

[0086] like Figure 1 As shown, step 300 specifically includes the following steps:

[0087] Step 301, determine the main monitoring parameters: based on the typical working condition simulation test in step 100 and the main engine mounted test in the factory in step 200, the pressure flow driving characteristics of the hydraulic pump and the motor are preliminarily analyzed in step 108, the torque, speed and efficiency variation rules of the hydraulic pump and the motor are preliminarily analyzed in step 109, the performance parameter characteristics of the main engine mounted on the main engine for the factory test are analyzed in step 204, and the key sensitive parameters of the hydraulic pump and motor performance are obtained through comprehensive analysis, so as to determine the main parameters that need to be monitored during the construction site application test;

[0088] Step 302, determine the sampling rate: considering that the construction site application test time is long and the test data sample is large, it is necessary to determine a reasonable sampling frequency in advance. In this embodiment, the sampling frequency of the key monitored parameters is set to 1s / time;

[0089] Step 303, sensor arrangement: install the speed sensor, pressure sensor, and flow meter as close to the tested hydraulic pump and motor as possible, so as to record the pressure acting inside the hydraulic pump and motor and eliminate any influencing factors between the sensor and the tested pressure-bearing shell;

[0090] Step 304, data collection and transmission: when the host machine is running on the construction site, the test data of the tested hydraulic pump and motor are collected and transmitted in real time;

[0091] Step 305, data filtering and noise reduction processing: for the collected data, firstly filter and reduce noise to extract key data;

[0092] Step 306, invalid time domain data screening: for all data in the complete sampling period, the invalid data is screened out;

[0093] Step 307, curve fitting and comparison: curve fitting and comparative analysis are performed on the extracted key and effective data;

[0094] Step 308, sensitive parameter extraction: further extracting key sensitive parameters of hydraulic pump and motor performance changes;

[0095] Step 309, analyzing time-varying trends: studying the pressure flow characteristics, efficiency, temperature rise and other indicators of the hydraulic pump and motor under the installed condition and the changing rules with the running time;

[0096] Step 310, drawing performance degradation curves: drawing performance degradation curves of hydraulic pumps and motors, and analyzing degradation characteristics of their installed performance indicators;

[0097] Step 311 Reliability evaluation: Based on the above process, the operational reliability evaluation of the hydraulic pump and motor under installation conditions is completed, providing a basis for the design, development, optimization, upgrade and performance evaluation of the hydraulic pump and motor.

[0098] In summary, compared with the national standard test of hydraulic pumps and motors on standard test benches in the prior art, the installation reliability test and evaluation method of hydraulic pumps and motors provided in the embodiment of the present invention is a test and evaluation method for installation application. The method design provided in the embodiment of the present invention fully considers the complex and harsh installation application conditions, and combines the three aspects of typical working condition simulation test, in-factory host loading test and construction site application test, providing comprehensive and reliable test and evaluation results for hydraulic pumps and motors with high performance requirements.

[0099] The phrases "in some specific embodiments", "in some possible embodiments", or "the present invention" described in this specification mean that one or more embodiments of the present invention include specific features, structures, or characteristics described in conjunction with the embodiment. Therefore, the phrases "in some specific embodiments", "in some possible embodiments", or "the present invention" that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "include", "comprise", "have" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0100] The embodiments described above are only some embodiments of the present invention, rather than all embodiments. The components of the embodiments of the present invention generally described and shown in the drawings can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of protection of the present invention, but merely represents the selected embodiments of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims. In addition, based on the embodiments of the present invention, all other embodiments that can be obtained by those skilled in the art without making creative work should belong to the scope of protection of the present invention.

Claims

1. A comprehensive test and evaluation method for the installation reliability of a hydraulic pump and a motor, characterized in that: The steps include: Step 100: Typical working condition simulation test; Test the performance parameters of hydraulic pumps and motors based on simulated load conditions equivalent to typical operating conditions to preliminarily evaluate the performance of hydraulic pumps and motors; Step 100 specifically includes the following steps: Step 108, analyzing pressure and flow driving characteristics: analyzing the collected pressure and flow characteristic parameters, analyzing the driving characteristics of the hydraulic pump and motor, and preliminarily evaluating their performance; Step 109, analyzing the changing rules of torque, speed, and efficiency: analyzing the changing rules of the collected torque, speed, and efficiency, and preliminarily evaluating the performance of the hydraulic pump and motor; Step 200: Host loading test in the factory; Based on the data obtained in step 100, the performance parameters of the hydraulic pump and the motor when mounted on the main engine in the factory are tested to evaluate the performance of the hydraulic pump and the motor when mounted on the main engine in the factory; Step 200 specifically includes the following steps: Step 204, testing the host loading performance: Specifically, for multiple motors simultaneously mounted on the host, firstly, a single test of the multiple motors is performed, and the test items include the motor's no-load displacement, volumetric efficiency, total efficiency, starting efficiency, low-speed performance, sealing performance, leakage and variable characteristics; after completing the single test, further multi-motor synchronous loading test is performed, including dynamic response, variable hysteresis, torque and load matching, pressure flow drive consistency, so as to complete the multi-motor drive consistency evaluation; Step 205, performance evaluation: evaluating the performance of the hydraulic pump and motor mounted on the main engine through comparative analysis of test data; Step 300: Construction site application test and reliability assessment; Based on the various data obtained in step 100 and step 200, determine the test method in the actual construction site application scenario, and conduct a comprehensive evaluation of the installation reliability of the hydraulic pump and the motor according to the test data obtained by implementing the test method; Step 300 specifically includes the following steps: Step 301, determining the main monitoring parameters: according to the performance parameters obtained by the test in step 100 and step 200, and the parameter characteristics obtained by the analysis, determining the sensitive parameters of the performance of the hydraulic pump and the motor, and using the sensitive parameters as the key monitoring parameters in the actual construction site application evaluation; Step 302: determine the sampling rate; Step 303: sensor arrangement; Step 304: data collection and transmission; Step 305: data filtering and noise reduction processing; Step 306: Screen out invalid time domain data; Step 307: curve fitting and comparison; Step 308: Extract sensitive parameters; Step 309, analyzing time-varying trends; Step 310: draw a performance degradation curve; Step 311: Reliability assessment.

2. The installation reliability comprehensive test and evaluation method according to claim 1, characterized in that: The performance parameters described in step 100 include: the speed and torque of the hydraulic pump, the pressure, flow rate and oil temperature of the hydraulic pump inlet and outlet oil; the speed and torque of the motor, the pressure, flow rate and oil temperature of the motor inlet and outlet oil.

3. The installation reliability comprehensive test and evaluation method according to claim 2 is characterized in that: According to the performance parameters described in step 100, the pressure and flow driving characteristics of the hydraulic pump and the motor are analyzed and obtained.

4. The method for comprehensive test and evaluation of installed reliability according to claim 3, characterized in that: According to the performance parameters described in step 100, the changing rules of the speed, torque and efficiency of the hydraulic pump and the changing rules of the speed, torque and efficiency of the motor are analyzed and obtained.

5. The method for comprehensive test and evaluation of installed reliability according to claim 4, characterized in that: In step 200, before testing the performance parameters of the hydraulic pump and the motor when mounted on the main engine in the factory, the following steps are included: Design the transition interface between the hydraulic pump and the motor according to the selected working environment; Standardize the assembly process of hydraulic pumps, motors and main engines according to the selected working conditions.

6. The method for comprehensive test and evaluation of installed reliability according to claim 5, characterized in that: The performance parameters described in step 200 include: No-load displacement, volumetric efficiency, overall efficiency, starting efficiency, low-speed performance, sealing performance, leakage and variable characteristics of a single motor; Dynamic response, variable hysteresis, torque and load matching, and pressure and flow drive consistency during multi-motor synchronization.

7. The method for comprehensive test and evaluation of installed reliability according to claim 6, characterized in that: In step 300, the testing method includes: According to the performance parameters obtained by the test in step 100 and step 200, and the parameter characteristics obtained by the analysis, the sensitive parameters of the performance of the hydraulic pump and the motor are determined, the sensitive parameters are used as the key monitoring parameters in the actual construction site application evaluation, and the sampling rate is determined; Arrange sensors according to the parameters to be monitored and collect data; The collected data are processed and analyzed to obtain the degradation characteristics of the installed performance indicators of the hydraulic pump and motor.

8. The machine reliability comprehensive test and evaluation method according to claim 7 is characterized in that: The collected data is processed and analyzed, including the following steps: Filter and reduce noise on the collected data to extract key data; For all data in the complete sampling period, invalid data is filtered out; Carry out curve fitting and comparative analysis on the extracted key data and valid data; Based on the curve fitting and comparative analysis, the key sensitive parameters of the performance changes of hydraulic pumps and motors are further extracted; Analyze the time-varying patterns of key sensitive parameters of hydraulic pumps and motors; The performance degradation curves of hydraulic pumps and motors are drawn according to the changing patterns of key sensitive parameters over time, and the degradation characteristics of the installed performance indicators of hydraulic pumps and motors are obtained through analysis.

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