CN114542448B - Durability test method for hydrogen circulating pump - Google Patents
Durability test method for hydrogen circulating pump Download PDFInfo
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- CN114542448B CN114542448B CN202210211330.XA CN202210211330A CN114542448B CN 114542448 B CN114542448 B CN 114542448B CN 202210211330 A CN202210211330 A CN 202210211330A CN 114542448 B CN114542448 B CN 114542448B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The invention provides a durability test method of a hydrogen circulating pump, belongs to the technical field of fuel cell engines, and solves the problem that the durability of the hydrogen circulating pump cannot be verified in the prior art. The method comprises the following steps: the method comprises the steps of constructing a test bench of a hydrogen circulating pump to be tested, wherein the test bench comprises a pressure selecting unit and a multi-channel testing unit which are sequentially connected, and each channel is provided with the hydrogen circulating pump to be tested and regulating equipment; starting a pressure selection unit and gating a channel, and controlling a hydrogen circulating pump to be tested to run at set power; and acquiring the power supply current and the rotating speed of the hydrogen circulating pump to be tested in the running process, the temperature of the output gas and the test data of whether the clamping occurs or not, and further acquiring a test conclusion whether the durability is qualified or not. The method tests the hydrogen circulating pump, greatly accelerates the durability verification time, and simultaneously effectively saves development cost and improves user experience as the complete machine verification and real vehicle carrying verification of the fuel cell engine are not needed.
Description
Technical Field
The invention relates to the technical field of fuel cell engines, in particular to a durability test method of a hydrogen circulating pump.
Background
The fuel cell engine is a device for generating water by electrochemical reaction of hydrogen and oxygen and outputting electric energy, has the advantages of high power generation efficiency, small environmental pollution, high specific energy, low noise and the like, is widely focused in the field of new energy, and has better application prospect in the field of automobiles.
The durability of the hydrogen circulation pump, which is a core component of the fuel cell engine, directly determines the performance of the fuel cell engine. At present, no testing device for verifying the durability of the hydrogen circulating pump exists, and the testing device for specially verifying the durability of the hydrogen circulating pump is provided, so that the development of the fuel cell engine industry is in need of solving the problem.
Disclosure of Invention
In view of the above analysis, the present invention provides a method for testing the durability of a hydrogen circulation pump, which is used for solving the problem that the durability of the hydrogen circulation pump cannot be verified in the prior art.
In one aspect, an embodiment of the present invention provides a method for testing durability of a hydrogen circulation pump, including the steps of:
a test bed of the hydrogen circulating pump to be tested is built, and the test bed comprises a pressure selection unit and a multi-channel test unit which are connected in sequence; each channel in the multi-channel test unit is independent and connected in parallel, and each channel is provided with a hydrogen circulating pump to be tested and a regulating and controlling device for regulating and controlling the flow and the pressure of the input gas of the hydrogen circulating pump to be tested;
starting a pressure selection unit, controlling the pressure selection unit to output gas with set pressure, gating corresponding channels of the multi-channel test unit, and controlling a hydrogen circulating pump to be tested on the gating channel to run with set power;
and acquiring the power supply current and the rotating speed of the hydrogen circulating pumps to be tested on all the gating channels in the operation process, outputting the gas temperature and the test data of whether the blocking occurs or not, and further acquiring the test result of whether the durability of the hydrogen circulating pumps to be tested is qualified or not.
The beneficial effects of the technical scheme are as follows: in order to verify the durability of the hydrogen circulating pump to be tested, a durability test method of the hydrogen circulating pump is provided, and an important support can be provided for the durability test. The hydrogen circulating pump to be tested is subjected to independent test verification through the test bed, so that the verification time is greatly saved, and meanwhile, the whole fuel cell engine is not required to be verified and the real vehicle is not required to be carried for verification, so that the development cost is greatly saved. And the durability of the hydrogen circulating pump to be tested is judged according to the results of various set pressures, so that the reverse support design development work through the test is facilitated.
Based on a further improvement of the above method, the test stand further comprises a controller;
the regulating and controlling equipment on each channel of the multi-channel testing unit comprises a stop valve and a current stabilizer which are connected in sequence; the stop valve and the current stabilizer are sequentially connected end to end and then connected with the air inlet end of the hydrogen circulating pump to be tested of the channel;
the output end of the controller is respectively connected with the control ends of all the stop valves and the current stabilizer so as to independently control the stop valves and the current stabilizer of the gating channels and realize independent tests of the hydrogen circulating pumps to be tested of different channels.
Further, the regulating device on each channel of the multi-channel test unit further comprises a throttle valve; wherein, the liquid crystal display device comprises a liquid crystal display device,
the input end of the throttle valve is connected with the air outlet end of the hydrogen circulation pump to be tested on the channel, the output end of the throttle valve is connected with the air inlet of the air outlet structure, and the control end of the throttle valve is connected with the output end of the controller so as to independently adjust the pressure rise of the gas of the hydrogen circulation pump to be tested passing through the gating channel.
Further, the test stand further comprises an air cleaner for particulate matter control of the gas discharged from the air intake structure; wherein, the liquid crystal display device comprises a liquid crystal display device,
the input end of the air filter is connected with the exhaust end of the air inlet structure, and the output end of the air filter is connected with the air inlet end of the pressure selecting unit.
Further, the step of obtaining the power supply current and the rotation speed of the hydrogen circulation pump to be tested on all the gating channels in the operation process, the output gas temperature and the test data of whether the blocking occurs, and further obtaining the test result of whether the durability of the hydrogen circulation pump to be tested is qualified, further comprises:
monitoring the gas pressure of the gas outlet end of the hydrogen circulating pump to be detected on each gating channel;
judging whether the gas pressure of the gas outlet end of the hydrogen circulating pump to be tested at the current moment reaches a preset value, if not, sending a real-time regulating instruction to a throttle valve in regulating equipment until the gas pressure of the gas outlet end of the hydrogen circulating pump to be tested reaches the preset value, and executing the next step;
acquiring the gas pressure of the gas inlet end of the hydrogen circulation pump to be detected on the gating channel after the gas pressure reaches a preset value, and judging whether the gas entering the hydrogen circulation pump to be detected is stable or not according to the variation amplitude of the gas pressure; if the hydrogen circulation pump is unstable, a control instruction is sent to a current stabilizer in the regulation and control equipment of the channel until the gas entering the hydrogen circulation pump to be tested is stable, and the next step is executed;
controlling a hydrogen circulating pump to be tested on the gating channel after gas stabilization to continuously run for preset time with limit power or simulate the real machine running state to change the speed to change the power cycle to run for preset time;
acquiring the quantity of stuck hydrogen circulation pumps to be detected on the gating channels in the regulation and operation process and test data of gas temperature, power supply current and rotating speed output by the hydrogen circulation pumps to be detected on the gating channels corresponding to the non-stuck hydrogen circulation pumps in the preset time;
and carrying out durability analysis according to the test data to obtain a test result of whether the durability of the hydrogen circulating pump to be tested is qualified.
Further, the step of performing durability analysis according to the test data to obtain a test result of whether the durability of the hydrogen circulation pump to be tested is qualified, further includes:
counting the number of the hydrogen circulation pumps to be detected, which are blocked in the preset time, judging whether the ratio of the number to the total number of the hydrogen circulation pumps to be detected in the gating channel exceeds a set value, if so, judging that the durability of the hydrogen circulation pumps to be detected is unqualified, otherwise, executing the next step;
counting the number of the hydrogen circulation pumps to be detected, wherein the number of the hydrogen circulation pumps to be detected is detected, the power supply current and the rotating speed of the hydrogen circulation pumps to be detected are higher than a preset value in preset time and last for more than a preset time, on the corresponding gating channel, judging whether the ratio of the number to the total number of the hydrogen circulation pumps to be detected of the gating channel exceeds a set value, if yes, judging that the durability of the hydrogen circulation pumps to be detected is unqualified, otherwise, executing the next step;
counting the number of the hydrogen circulation pumps to be detected, which are not blocked and correspond to the gating channels, and wherein the gas temperature of the hydrogen circulation pumps to be detected exceeds the normal working temperature of the circulation pumps, judging whether the ratio of the number to the total number of the hydrogen circulation pumps to be detected of the gating channels exceeds a set value, if so, judging that the durability of the hydrogen circulation pumps to be detected is unqualified, otherwise, judging that the durability of the hydrogen circulation pumps to be detected is qualified.
Further, for the multi-channel test unit only comprising one hydrogen circulating pump to be tested, if the clamping occurs, or the power supply current and the rotating speed exceed 25% of the preset value and last for more than 1min in the preset time, or the gas temperature exceeds any one of the 100% of the normal working temperature of the circulating pump, the durability of the hydrogen circulating pump to be tested is judged to be unqualified, otherwise, the durability of the hydrogen circulating pump to be tested is judged to be qualified.
Further, the durability test method further includes the steps of:
after a test bed of the hydrogen circulating pump to be tested is placed in a high-temperature environment bin, monitoring the temperature of gas entering a pressure selecting unit;
and sending a temperature adjustment instruction to temperature control equipment in the high-temperature environment bin according to the temperature of the gas entering the pressure selection unit until the temperature of the gas entering the pressure selection unit reaches a set value.
Further, the test bed of the hydrogen circulating pump to be tested also comprises an air filter for controlling particulate matters by gas input by the hydrogen circulating pump to be tested; wherein, the liquid crystal display device comprises a liquid crystal display device,
the output end of the air filter is connected with the air inlet end of the pressure selecting unit.
Further, the durability test method further includes the steps of:
a particle sensor is arranged on the inner wall of the pipeline at the output end of the air filter;
judging whether the gas quality fed into the pressure selecting unit meets the set requirement or not according to the particle value acquired by the particle sensor, and sending out a warning of cleaning or replacing the air filter element when the set requirement is not met until the gas quality meets the set requirement, and executing the step of acquiring test data.
Further, the controller further comprises a data acquisition unit and a data processing and controlling unit which are connected in sequence; wherein, the liquid crystal display device comprises a liquid crystal display device,
the data acquisition unit further comprises a pressure sensor, a temperature sensor, a current sensor and a speed sensor; wherein, the liquid crystal display device comprises a liquid crystal display device,
the pressure sensors are respectively arranged on the inner walls of the pipeline at the air inlet end and the air outlet end of the hydrogen circulating pump to be tested on each channel of the multichannel test unit; the output ends of all the pressure sensors are connected with the input end of the data processing and control unit and are used for collecting the gas pressure of the air inlet end and the air outlet end of the hydrogen circulating pump to be tested on the inlet gating channel;
the temperature sensors are respectively arranged on the inner wall of the gas transmission pipeline at the input end of the pressure selection unit and on the inner wall of the gas outlet end pipeline of the hydrogen circulating pump to be tested on each channel of the multi-channel test unit and are used for collecting the temperature of the gas entering the pressure selection unit and the temperature of the gas output by the hydrogen circulating pump to be tested on the gating channel;
the current sensor is arranged at the power supply end of the hydrogen circulating pump to be tested on each channel of the multi-channel test unit and is used for collecting the power supply current of the hydrogen circulating pump to be tested on the channel;
the speed sensor is arranged on a rotor of a motor in the hydrogen circulating pump to be tested on each channel of the multi-channel testing unit and is used for collecting the rotating speed of the hydrogen circulating pump to be tested;
the data processing and control unit controls the corresponding channels of the starting pressure selecting unit and the gating multi-channel testing unit to synchronously perform; and, in addition, the processing unit,
the pressure selecting unit further comprises a high-pressure selecting branch and a normal-pressure selecting branch which are connected in parallel; wherein, the liquid crystal display device comprises a liquid crystal display device,
the high-pressure selecting branch is provided with a first stop valve and a supercharger which are sequentially connected in series;
and a second stop valve is arranged on the normal pressure selection branch.
Compared with the prior art, the invention has at least one of the following beneficial effects:
1. the test bed is used for verifying the hydrogen circulating pump, so that the verification time is greatly accelerated, and meanwhile, the whole fuel cell engine is not required to be verified and the real vehicle is not required to be carried for verification, so that the development cost is saved.
2. The test bench department provides various control modes to judge the test of the hydrogen circulating pump to be tested, and is favorable for the development work of reverse support design through the test.
The summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the disclosure, nor is it intended to be used to limit the scope of the disclosure.
Drawings
The foregoing and other objects, features and advantages of the disclosure will be apparent from the following more particular descriptions of exemplary embodiments of the disclosure as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the disclosure.
FIG. 1 is a schematic diagram showing the steps of a method for testing the durability of the hydrogen circulation pump of example 1;
FIG. 2 is a schematic diagram showing the composition of a test bench of the hydrogen circulation pump to be tested in example 2;
FIG. 3 shows two schematic diagrams of the test bench composition of the hydrogen circulation pump to be tested in example 2;
fig. 4 shows a schematic circuit connection diagram of the test bench composition two of example 2.
Reference numerals:
1-a controller; 2-an air inlet structure; 3-an air cleaner; 4-particulate matter sensor; 51-a first temperature sensor; 52-a second temperature sensor, 53-a third temperature sensor; 61-a first shut-off valve; 62-a second shut-off valve; 63-a third stop valve; 64-fourth shut-off valve; 71-a first current stabilizer; 72-a second current stabilizer; 81-a first pressure sensor; 82-a second pressure sensor; 83-a third pressure sensor; 84-fourth pressure sensor; 91-a hydrogen circulating pump I to be tested; 92-a hydrogen circulating pump II to be tested; 101-a first throttle valve; 102-a second throttle valve; 11-a supercharger; 12-air outlet structure.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While embodiments of the present disclosure are illustrated in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The term "comprising" and variations thereof as used herein means open ended, i.e., "including but not limited to. The term "or" means "and/or" unless specifically stated otherwise. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment. The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like, may refer to different or the same object. Other explicit and implicit definitions are also possible below.
Example 1
In one embodiment of the present invention, a method for testing durability of a hydrogen circulation pump is disclosed, as shown in fig. 1, comprising the steps of:
s1, constructing a test bed of a hydrogen circulating pump to be tested, wherein the test bed comprises a pressure selection unit and a multi-channel test unit which are connected in sequence; each channel in the multi-channel test unit is mutually independent and connected in parallel, and each channel is provided with a hydrogen circulation pump to be tested (the durability test can be independently carried out on the hydrogen circulation pump to be tested of the channel) and a regulating and controlling device for regulating and controlling the flow and the pressure of the input gas of the hydrogen circulation pump to be tested;
s2, starting a pressure selection unit, controlling the pressure selection unit to output gas with set pressure, gating corresponding channels of the multi-channel test unit, and controlling a hydrogen circulating pump to be tested on the gating channel to operate with set power;
s3, acquiring the power supply current and the rotating speed of the hydrogen circulating pumps to be tested on all the gating channels in the operation process, outputting the gas temperature and testing data of whether the blocking occurs or not, and further acquiring a test result of whether the durability of the hydrogen circulating pumps to be tested is qualified or not.
And the pressure selecting unit is used for outputting the gas with the set pressure according to the control of the controller.
Compared with the prior art, the embodiment provides a durability test method of the hydrogen circulating pump, which can provide important support for the durability test of various hydrogen circulating pumps. The hydrogen circulating pump to be tested is subjected to independent test verification through the test bed, so that the verification time is greatly saved, and meanwhile, the whole fuel cell engine is not required to be verified and the real vehicle is not required to be carried for verification, so that the development cost is greatly saved. And the durability of the hydrogen circulating pump to be tested is judged according to the results of various set pressures, so that the reverse support design development work through the test is facilitated.
Example 2
The improvement on the method of the embodiment 1 is that the test stand further comprises a controller, an air inlet structure and an air outlet structure.
The air inlet structure, the pressure selecting unit, the multi-channel testing unit and the air outlet structure are sequentially connected, as shown in fig. 2. And an air intake structure for inputting a gas such as hydrogen or a substitute gas for hydrogen (e.g., air). And the air outlet structure is used for outputting air.
Preferably, the shape of the air inlet structure and the air outlet structure are both horn-shaped. The inner diameter of the air inlet end of the air inlet structure is larger than the inner diameter of the air outlet end of the air inlet structure, the air inlet end is upward, the inner diameter of the air inlet end of the air outlet structure is smaller than the inner diameter of the air outlet end of the air outlet structure, and the air outlet end is arranged towards one side of the test device.
The controller is used for controlling the pressure selection unit to output gas with set pressure according to a pressure test instruction input by a user, gating corresponding channels of the multi-channel test unit, and controlling the hydrogen circulating pump to be tested on the gating channel to perform durability test with set power; and obtaining test data, and further obtaining a test result of whether the durability of the hydrogen circulating pump to be tested is qualified. All control can be achieved by one controller.
Preferably, the regulating and controlling equipment on each channel of the multi-channel testing unit comprises a stop valve and a current stabilizer which are connected in sequence, as shown in figures 3-4. The stop valve and the current stabilizer are sequentially connected end to end and then connected with the air inlet end of the hydrogen circulating pump to be tested of the channel.
The output end of the controller is respectively connected with the control ends of all the stop valves and the current stabilizer, and the stop valves and the current stabilizer of each channel are independently controlled so as to independently test the hydrogen circulating pumps to be tested of different channels.
Preferably, the regulating device on each channel of the multi-channel test unit further comprises a throttle valve. The input end of the throttle valve is connected with the air outlet end of the hydrogen circulating pump to be tested on the channel, the output end of the throttle valve is connected with the air inlet of the air outlet structure, and the control end of the throttle valve is connected with the output end of the controller so as to independently adjust the pressure rise of the gas of the hydrogen circulating pump to be tested passing through the gating channel.
Preferably, the test stand further comprises an air cleaner for particulate matter control of the gas exhausted within the air intake structure. The input end of the air filter is connected with the exhaust end of the air inlet structure, and the output end of the air filter is connected with the air inlet end of the pressure selecting unit.
Preferably, the test stand further comprises a particulate matter sensor provided on an inner wall of the output end pipe of the air cleaner. The output end of the particulate matter sensor is connected with the input end of the controller. And the controller is also used for judging whether the gas quality fed into the pressure selection unit meets the set requirement according to the particulate matter value acquired by the particulate matter sensor, and sending out a warning for cleaning or replacing the air filter element when the set requirement is not met.
Preferably, the controller comprises a data acquisition unit and a data processing and control unit which are connected in sequence.
The data acquisition unit is used for acquiring the temperature of the gas entering the pressure selection unit, and the gas pressure, the power supply current, the rotating speed and the output gas temperature of the gas inlet end and the gas outlet end of the hydrogen circulating pump to be detected on the gating channel, and sending the gas to the data processing and control unit.
The data processing and controlling unit is used for controlling the pressure selecting unit to output gas with set pressure (high pressure or normal pressure) according to the pressure testing instruction input by a user, gating the corresponding channels of the multi-channel testing unit, controlling the hydrogen circulating pump to be tested on the gating channel to start to set power for performing durability testing, and sending real-time regulating and controlling instructions to the regulating and controlling equipment according to the gas pressure of the air inlet end and the air outlet end of the hydrogen circulating pump to be tested on the gating channel so as to ensure that the gas entering the hydrogen circulating pump to be tested is stable and the gas pressure of the hydrogen circulating pump to be tested is discharged to reach a preset value; and acquiring test data of whether all the hydrogen circulating pumps to be tested are blocked or not, and further obtaining a test result of whether the durability of the hydrogen circulating pumps to be tested is qualified or not according to the test data in combination with the temperature of the gas entering the pressure selecting unit, the temperature of the gas output by the hydrogen circulating pumps to be tested on the gating channel and the power supply current.
Preferably, the data processing is performed in synchronization with the control unit controlling the respective channels of the activation pressure selection unit and the strobe multi-channel test unit.
Preferably, the data acquisition unit further comprises a pressure sensor, a temperature sensor, a current sensor, a speed sensor.
The pressure sensors are respectively arranged on the inner walls of the pipeline at the air inlet end and the air outlet end of the hydrogen circulating pump to be tested on each channel of the multichannel test unit. And the output ends of all the pressure sensors are connected with the input end of the data processing and control unit and are used for collecting the gas pressure of the air inlet end and the air outlet end of the hydrogen circulating pump to be tested on the inlet gating channel.
The temperature sensors are respectively arranged on the inner wall of the gas transmission pipeline at the input end of the pressure selection unit and on the inner wall of the gas outlet end pipeline of the hydrogen circulating pump to be tested on each channel of the multi-channel test unit and are used for collecting the temperature of the gas entering the pressure selection unit and the temperature of the gas output by the hydrogen circulating pump to be tested on the gating channel.
The current sensor is arranged at the power supply end of the hydrogen circulating pump to be tested on each channel of the multi-channel test unit and is used for collecting the power supply current of the hydrogen circulating pump to be tested on the channel.
The speed sensor is arranged on a rotor of a motor in the hydrogen circulating pump to be tested on each channel of the multi-channel testing unit and is used for collecting the rotating speed of the hydrogen circulating pump to be tested.
Preferably, the pressure selecting unit further includes two branches of a high-pressure selecting branch and a normal-pressure selecting branch connected in parallel. The high-pressure selecting branch is provided with a first stop valve and a supercharger which are sequentially connected in series; and a second stop valve is arranged on the normal pressure selection branch.
Preferably, before the data processing and control unit works, device inspection should be performed to determine the working states of the sensors and the components respectively, whether faults exist or not, whether the air leakage phenomenon exists in each air connection port or not is checked, the operation is performed for 5 minutes, and the state of the air filter is checked.
After the above-described inspection is completed, the durability test of steps S2 to S3 is further performed.
Preferably, step S3 further comprises:
s31, monitoring the gas pressure of the gas outlet end of the hydrogen circulating pump to be detected on each gating channel;
s32, judging whether the gas pressure of the gas outlet end of the hydrogen circulating pump to be tested at the current moment reaches a preset value, if not, sending a real-time regulation and control instruction to a throttle valve in regulation and control equipment until the gas pressure of the gas outlet end of the hydrogen circulating pump to be tested is discharged reaches the preset value, and executing the next step;
s33, acquiring the gas pressure of the gas inlet end of the hydrogen circulation pump to be detected on the gating channel after the gas pressure reaches a preset value, and judging whether the gas entering the hydrogen circulation pump to be detected is stable or not according to the variation amplitude of the gas pressure; if the hydrogen circulation pump is unstable (namely the amplitude variation exceeds the set range), a control instruction is sent to a current stabilizer in the regulation and control equipment of the channel until the gas entering the hydrogen circulation pump to be tested is stable, and the next step is executed;
s34, controlling a hydrogen circulating pump to be tested on the gating channel after gas stabilization to continuously run for preset time with limit power or simulate the running state of the real machine to change the rotation speed and power to periodically run for preset time (exemplarily, continuously run for 10000 hours or accelerate verification for 5000 hours);
s35, acquiring the quantity of stuck hydrogen circulation pumps to be detected on the gating channels in the regulation and operation process and test data of gas temperature, power supply current and rotating speed output by the hydrogen circulation pumps to be detected on the gating channels corresponding to the non-stuck hydrogen circulation pumps in the preset time;
s36, performing durability analysis according to the test data to obtain a test result of whether the durability of the hydrogen circulating pump to be tested is qualified.
Hydrogen preferably, step S36 further comprises:
s361, counting the number of the hydrogen circulation pumps to be tested, which are blocked in the preset time, judging whether the ratio of the number to the total number of the hydrogen circulation pumps to be tested of the gating channel exceeds a set value, if so, judging that the durability of the hydrogen circulation pumps to be tested is unqualified, otherwise, executing the next step;
s362, counting the number of the hydrogen circulation pumps to be tested, which are not blocked and are subjected to the corresponding gating channels, wherein the power supply current and the rotating speed of the hydrogen circulation pumps to be tested exceed a preset value within preset time and last for more than the preset time, judging whether the ratio of the number to the total number of the hydrogen circulation pumps to be tested of the gating channels exceeds a set value, if so, judging that the durability of the hydrogen circulation pumps to be tested is unqualified, otherwise, executing the next step;
s363, counting the number of the hydrogen circulation pumps to be detected, which are not blocked and correspond to the gating channels, wherein the gas temperature of the hydrogen circulation pumps to be detected exceeds the normal working temperature of the circulation pumps, judging whether the ratio of the number to the total number of the hydrogen circulation pumps to be detected of the gating channels exceeds a set value, if so, judging that the durability of the hydrogen circulation pumps to be detected is unqualified, and if not, judging that the durability of the hydrogen circulation pumps to be detected is qualified.
Preferably, for the multi-channel test unit including only one to-be-tested hydrogen circulation pump, if the test unit is stuck, or the power supply current and the rotation speed exceed 25% of the preset value and last for more than 1min in the preset time, or the gas temperature exceeds any one of 100% of the normal working temperature of the circulation pump, the durability of the to-be-tested hydrogen circulation pump is judged to be unqualified, otherwise, the durability of the to-be-tested hydrogen circulation pump is judged to be qualified.
Preferably, the durability test method of the hydrogen circulation pump further includes the steps of:
s01, placing a test bed of the hydrogen circulating pump to be tested in a high-temperature environment bin, and monitoring the temperature of gas entering a pressure selecting unit;
s02, sending a temperature adjustment instruction to temperature control equipment in the high-temperature environment bin according to the temperature of the gas entering the pressure selection unit until the temperature of the gas entering the pressure selection unit reaches a set value.
Preferably, the durability test method of the hydrogen circulation pump further includes the steps of:
s03, arranging a particulate matter sensor on the inner wall of an output end pipeline of the air filter;
s04, judging whether the gas quality fed into the pressure selecting unit meets the set requirement according to the particulate matter value acquired by the particulate matter sensor, and sending out a warning of cleaning or replacing the air filter element when the set requirement is not met (namely, the particulate matter value exceeds the standard value and meets the set requirement when the particulate matter value is smaller than the standard value) until the gas quality meets the set requirement, and executing the steps S2-S3.
Preferably, after the gas quality meets the set requirement, the pressure selecting unit is controlled to output the gas with the set pressure (high pressure or normal pressure) according to the pressure test instruction input by the user, the corresponding channels of the multi-channel test unit are simultaneously gated, and the hydrogen circulating pump to be tested on the gated channel is controlled to start so as to set the power operation.
Preferably, the durability test method further comprises the steps of:
s4, (simultaneously in the step S3 in the test process) monitoring the quality of the lubricating oil of the circulating pump and the oil seal test data;
s5, judging that the durability of the hydrogen circulation pump to be tested is unqualified if the lubricating oil emulsion or the oil seal is obviously leaked within the preset time.
With the structure shown in fig. 4, in operation, air enters through the air inlet structure 2, is filtered through the air filter 3, and the filtered air is checked for air quality when passing through the particulate matter sensor 4 and fed back to the controller 1, and if the air quality does not meet the requirements, the air filter 3 needs to be cleaned or replaced. Next, the gas is measured in temperature by the first temperature sensor 51 and then enters the pressure selection channel of the pressure selection unit, and if the normal pressure test is used, the second shut-off valve 62 is opened, the gas flow directly enters each channel of the multi-channel test unit, and if the high pressure test is used, the first shut-off valve 61 is opened, and the booster 11 starts to operate so that the pressure before entering each channel of the multi-channel test unit reaches a specified value. The two channels of the multi-channel test unit are respectively controlled to be on-off by a third stop valve 63 and a fourth stop valve 64, and one channel or two channels can be selected for simultaneous use according to requirements. The first current stabilizer 71 and the second current stabilizer 71 are respectively arranged on the two channels, so that the gas entering the hydrogen circulation pumps 91 and 92 to be tested is stabilized. Then, the gas pressure before entering the hydrogen circulation pumps 91 and 92 to be measured is measured by the first pressure sensor 81 and the second pressure sensor 82, and then the gas pressure enters the first hydrogen circulation pump 91 and the second hydrogen circulation pump 92 respectively, and the gas pressure passes through the first throttle valve 101 and the second throttle valve 102 respectively to control the pressure rise of the two channels (different pressure rises are selected according to different hydrogen circulation pumps to be measured). The throttle valve is then passed through the second temperature sensor 52 and the third temperature sensor 53 to measure the pressure of the gas after pressurization in both passages, then passed through the third pressure sensor 83 and the fourth pressure sensor 84 to measure the pressure of the gas after pressurization, and finally the gas is discharged through the exhaust port of the gas outlet structure 12.
Compared with the embodiment 1, the method provided by the embodiment has the following beneficial effects:
1. the test bed is used for verifying the air circulation pump, so that the verification time is greatly accelerated, and meanwhile, the whole fuel cell engine is not required to be verified and the real vehicle is not required to be carried for verification, so that the development cost is saved.
2. The test bench department provides various control modes to judge the test of the hydrogen circulating pump to be tested, and is favorable for the development work of reverse support design through the test.
The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of the prior art, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (10)
1. The durability test method of the hydrogen circulating pump is characterized by comprising the following steps of:
a test bed of the hydrogen circulating pump to be tested is built, and the test bed comprises a pressure selection unit and a multi-channel test unit which are connected in sequence; each channel in the multi-channel test unit is independent and connected in parallel, and each channel is provided with a hydrogen circulating pump to be tested and a regulating and controlling device for regulating and controlling the flow and the pressure of the input gas of the hydrogen circulating pump to be tested;
starting a pressure selection unit, controlling the pressure selection unit to output gas with set pressure, gating corresponding channels of the multi-channel test unit, and controlling a hydrogen circulating pump to be tested on the gating channel to run with set power;
and acquiring the power supply current and the rotating speed of the hydrogen circulating pumps to be tested on all the gating channels in the operation process, outputting the gas temperature and the test data of whether the blocking occurs or not, and further acquiring the test result of whether the durability of the hydrogen circulating pumps to be tested is qualified or not.
2. The method for testing the durability of a hydrogen circulation pump according to claim 1, wherein the test stand further comprises a controller; and, in addition, the processing unit,
the regulating and controlling equipment on each channel of the multi-channel testing unit comprises a stop valve and a current stabilizer which are connected in sequence; the stop valve and the current stabilizer are sequentially connected end to end and then connected with the air inlet end of the hydrogen circulating pump to be tested of the channel;
the output end of the controller is respectively connected with the control ends of all the stop valves and the current stabilizer so as to independently control the stop valves and the current stabilizer of the gating channels and realize independent tests of the hydrogen circulating pumps to be tested of different channels.
3. The method for testing the durability of a hydrogen circulation pump according to claim 2, wherein the regulating device on each channel of the multi-channel test unit further comprises a throttle valve; wherein, the liquid crystal display device comprises a liquid crystal display device,
the input end of the throttle valve is connected with the air outlet end of the hydrogen circulation pump to be tested on the channel, the output end of the throttle valve is connected with the air inlet of the air outlet structure, and the control end of the throttle valve is connected with the output end of the controller so as to independently adjust the pressure rise of the gas of the hydrogen circulation pump to be tested passing through the gating channel.
4. The method for testing the durability of the hydrogen circulation pump according to claim 3, wherein the step of obtaining the test data of the supply current and the rotation speed of the hydrogen circulation pump to be tested, the output gas temperature, and whether the seizure occurs on all the gating channels in the operation process, and further obtaining the test result of whether the durability of the hydrogen circulation pump to be tested is qualified, further comprises:
monitoring the gas pressure of the gas outlet end of the hydrogen circulating pump to be detected on each gating channel;
judging whether the gas pressure of the gas outlet end of the hydrogen circulating pump to be tested at the current moment reaches a preset value, if not, sending a real-time regulating instruction to a throttle valve in regulating equipment until the gas pressure of the gas outlet end of the hydrogen circulating pump to be tested reaches the preset value, and executing the next step;
acquiring the gas pressure of the gas inlet end of the hydrogen circulation pump to be detected on the gating channel after the gas pressure reaches a preset value, and judging whether the gas entering the hydrogen circulation pump to be detected is stable or not according to the variation amplitude of the gas pressure; if the hydrogen circulation pump is unstable, a control instruction is sent to a current stabilizer in the regulation and control equipment of the channel until the gas entering the hydrogen circulation pump to be tested is stable, and the next step is executed;
controlling a hydrogen circulating pump to be tested on the gating channel after gas stabilization to continuously run for preset time with limit power or simulate the real machine running state to change the speed to change the power cycle to run for preset time;
acquiring the quantity of stuck hydrogen circulation pumps to be detected on the gating channels in the regulation and operation process and test data of gas temperature, power supply current and rotating speed output by the hydrogen circulation pumps to be detected on the gating channels corresponding to the non-stuck hydrogen circulation pumps in the preset time;
and carrying out durability analysis according to the test data to obtain a test result of whether the durability of the hydrogen circulating pump to be tested is qualified.
5. The method for testing the durability of a hydrogen circulation pump according to claim 4, wherein the step of performing the durability analysis based on the test data to obtain a test result of whether the durability of the hydrogen circulation pump to be tested is acceptable, further comprises:
counting the number of the hydrogen circulation pumps to be detected, which are blocked in the preset time, judging whether the ratio of the number to the total number of the hydrogen circulation pumps to be detected in the gating channel exceeds a set value, if so, judging that the durability of the hydrogen circulation pumps to be detected is unqualified, otherwise, executing the next step;
counting the number of the hydrogen circulation pumps to be detected, wherein the number of the hydrogen circulation pumps to be detected is detected, the power supply current and the rotating speed of the hydrogen circulation pumps to be detected are higher than a preset value in preset time and last for more than a preset time, on the corresponding gating channel, judging whether the ratio of the number to the total number of the hydrogen circulation pumps to be detected of the gating channel exceeds a set value, if yes, judging that the durability of the hydrogen circulation pumps to be detected is unqualified, otherwise, executing the next step;
counting the number of the hydrogen circulation pumps to be detected, which are not blocked and correspond to the gating channels, and wherein the gas temperature of the hydrogen circulation pumps to be detected exceeds the normal working temperature of the circulation pumps, judging whether the ratio of the number to the total number of the hydrogen circulation pumps to be detected of the gating channels exceeds a set value, if so, judging that the durability of the hydrogen circulation pumps to be detected is unqualified, otherwise, judging that the durability of the hydrogen circulation pumps to be detected is qualified.
6. The method according to any one of claims 1 to 5, wherein for a multi-channel test unit including only one hydrogen circulation pump to be tested, if a seizure occurs, or the supply current and the rotation speed exceed 25% of predetermined values for more than 1min within a predetermined time, or the gas temperature exceeds any one of 100% of the normal operating temperature of the circulation pump, the durability of the hydrogen circulation pump to be tested is judged to be unacceptable, otherwise, the durability of the hydrogen circulation pump to be tested is judged to be acceptable.
7. The method for testing the durability of a hydrogen circulation pump according to claim 6, further comprising the step of:
after a test bed of the hydrogen circulating pump to be tested is placed in a high-temperature environment bin, monitoring the temperature of gas entering a pressure selecting unit;
and sending a temperature adjustment instruction to temperature control equipment in the high-temperature environment bin according to the temperature of the gas entering the pressure selection unit until the temperature of the gas entering the pressure selection unit reaches a set value.
8. The method for testing the durability of the hydrogen circulation pump according to any one of claims 1 to 5 and 7, wherein the test stand of the hydrogen circulation pump to be tested further comprises an air filter for controlling particulate matters of the gas input by the hydrogen circulation pump to be tested; wherein, the liquid crystal display device comprises a liquid crystal display device,
the output end of the air filter is connected with the air inlet end of the pressure selecting unit.
9. The method for testing the durability of a hydrogen circulation pump according to claim 8, further comprising the step of:
a particle sensor is arranged on the inner wall of the pipeline at the output end of the air filter;
judging whether the gas quality fed into the pressure selecting unit meets the set requirement or not according to the particle value acquired by the particle sensor, and sending out a warning of cleaning or replacing the air filter element when the set requirement is not met until the gas quality meets the set requirement, and executing the step of acquiring test data.
10. The method for testing the durability of a hydrogen circulation pump according to any one of claims 2 to 5, wherein the controller further comprises a data acquisition unit, a data processing and control unit, which are connected in sequence; wherein, the liquid crystal display device comprises a liquid crystal display device,
the data acquisition unit further comprises a pressure sensor, a temperature sensor, a current sensor and a speed sensor; wherein, the liquid crystal display device comprises a liquid crystal display device,
the pressure sensors are respectively arranged on the inner walls of the pipeline at the air inlet end and the air outlet end of the hydrogen circulating pump to be tested on each channel of the multichannel test unit; the output ends of all the pressure sensors are connected with the input end of the data processing and control unit and are used for collecting the gas pressure of the air inlet end and the air outlet end of the hydrogen circulating pump to be tested on the inlet gating channel;
the temperature sensors are respectively arranged on the inner wall of the gas transmission pipeline at the input end of the pressure selection unit and on the inner wall of the gas outlet end pipeline of the hydrogen circulating pump to be tested on each channel of the multi-channel test unit and are used for collecting the temperature of the gas entering the pressure selection unit and the temperature of the gas output by the hydrogen circulating pump to be tested on the gating channel;
the current sensor is arranged at the power supply end of the hydrogen circulating pump to be tested on each channel of the multi-channel test unit and is used for collecting the power supply current of the hydrogen circulating pump to be tested on the channel;
the speed sensor is arranged on a rotor of a motor in the hydrogen circulating pump to be tested on each channel of the multi-channel testing unit and is used for collecting the rotating speed of the hydrogen circulating pump to be tested;
the data processing and control unit controls the corresponding channels of the starting pressure selecting unit and the gating multi-channel testing unit to synchronously perform; and, in addition, the processing unit,
the pressure selecting unit further comprises a high-pressure selecting branch and a normal-pressure selecting branch which are connected in parallel; wherein, the liquid crystal display device comprises a liquid crystal display device,
the high-pressure selecting branch is provided with a first stop valve and a supercharger which are sequentially connected in series;
and a second stop valve is arranged on the normal pressure selection branch.
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