CN115307918A - Test run test system of pulse type engine - Google Patents
Test run test system of pulse type engine Download PDFInfo
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- CN115307918A CN115307918A CN202211243766.3A CN202211243766A CN115307918A CN 115307918 A CN115307918 A CN 115307918A CN 202211243766 A CN202211243766 A CN 202211243766A CN 115307918 A CN115307918 A CN 115307918A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a trial run test system of a pulse type engine, which comprises a hollow temperature test box; the temperature test box is respectively connected with an engine ignition system and an air supply system; a pulsating engine to be tested is arranged in the temperature test box; the air supply system is used for conveying dry air with target high temperature or target low temperature to the inner cavity of the temperature test box; the engine ignition system is used for igniting and starting the pulse type engine; the engine ignition system comprises a fuel subsystem and a combustion-supporting air intake subsystem. The invention can solve the problems of long preparation period, high site requirement, increased cost and the like of the high-temperature and low-temperature test run test of the existing pulse type engine, can meet the environmental requirement and equipment requirement of the engine in the test run test under high-temperature and low-temperature environments, has the advantages of high test efficiency, low test cost, no influence of external environment and the like, and has great practical significance.
Description
Technical Field
The invention relates to the technical field of high-temperature and low-temperature trial run tests of pulse engines, in particular to a trial run test system of a pulse engine.
Background
The pulse engine has the advantages of high thermal cycle efficiency, simple structure, low cost and the like, and is mainly applied to missiles, target drone aircraft and aviation models. In order to assess the performance and reliability of the pulse type engine, a ground test run is carried out on the pulse type engine before application, whether the performance of the engine meets the requirement or not is tested, and meanwhile, the design defects of the engine are exposed, so that guidance is provided for optimization and improvement of the pulse type engine.
At present, the existing pulse type engine ground test is basically a working test at normal temperature, and the performance and the reliability of the pulse type engine under a high-temperature or low-temperature environment are difficult to assess. In the use process of the pulse type engine, various severe temperature environments are often encountered, so that the evaluation of the adaptability of the pulse type engine to the temperature environments in the working state becomes the key of the quality characteristic of the engine. In order to truly simulate the high and low temperature environments to which a pulse engine is subjected during operation, a test run needs to be performed in a temperature test chamber.
With the increasing application of pulse engines to various aircrafts, the pulse engines are very necessary to be tested in severe temperature environments, the traditional pulse engine ground test is difficult to achieve the purpose of examination, at present, for the traditional pulse engine ground test, the engines need to be tested in different regions in the country or test to fly away to examine the service performance of the engines, otherwise, various defects in an engine system are difficult to expose, therefore, the test mode is used for examining the temperature environment adaptability of the pulse engines, needs to consume great manpower and material resources, is easily influenced by climate environments of various regions, and is low in test efficiency.
Disclosure of Invention
The invention aims to provide a test run system of a pulse engine aiming at the technical defects in the prior art.
Therefore, the invention provides a trial run test system of a pulse type engine, which comprises a hollow temperature test box;
the temperature test box is respectively connected with an engine ignition system and an air supply system;
a pulsating engine to be tested is arranged in the temperature test box;
the air supply system is used for conveying dry air with target high temperature or target low temperature to the inner cavity of the temperature test box;
the engine ignition system is used for igniting and starting the pulse type engine;
the engine ignition system comprises a fuel subsystem and a combustion-supporting air intake subsystem;
the fuel subsystem comprises an igniter, an oil pump, an oil tank and a platform scale and is used for conveying fuel to the pulse type engine;
the combustion-supporting gas inlet subsystem comprises a starting gas cylinder group and an electric explosion valve and is used for conveying high-pressure combustion-supporting gas to the pulse type engine;
the igniter is arranged in the temperature test box and is communicated with an inner cavity of a combustion chamber of the pulse type engine;
an igniter for igniting fuel in a combustion chamber of a pulse engine;
an air inlet nozzle and a spray pipe on the pulse engine are communicated with the inner cavity of the combustion chamber;
the oil outlet of the oil outlet pipeline on the oil pump is communicated with the inner cavity of the combustion chamber of the pulse engine and is used for spraying fuel oil to the combustion chamber;
the oil inlet of the oil pump is communicated with the oil outlet of an oil tank;
fuel oil is stored in the oil tank in advance;
the oil tank is positioned at the top of the platform scale;
the air outlet of the starting air bottle group is connected with an air inlet nozzle on the pulse type engine through an electric explosion valve;
high-pressure combustion-supporting gas is stored in the starting gas bottle group in advance.
Compared with the prior art, the pulse engine test run test system provided by the invention has the advantages that the structural design is scientific, the problems of long preparation period, high site requirement, cost increase and the like of high-temperature and low-temperature test run tests of the existing pulse engine can be solved, the environmental requirements and equipment requirements of the engine in the test run tests under high-temperature and low-temperature environments can be met, the test efficiency is high, the test cost is low, the test run test system is not influenced by the external environment, and the pulse engine test run test system has great practical significance.
Drawings
FIG. 1 is a schematic structural diagram of an engine ignition system in a trial run test system of a pulse engine provided by the invention;
FIG. 2 is a schematic structural diagram of an air supply system in a trial run test system of a pulse engine provided by the invention;
in the figure, 1 is a temperature test box, 2 is an igniter, 3 is an oil pump, 4 is an oil tank, and 5 is a platform scale;
6 is a starting gas cylinder group, 7 is an electric explosion valve, 8 is a control unit, 9 is a voltage-stabilized power supply, and 10 is an operation and control system;
11 is an air filter, 12 is a first drier, 13 is a medium temperature refrigerator, 14 is a second drier, and 15 is a low temperature refrigerator set;
16 is a heater, and 17 is an exhaust fan;
181 is a first-stage refrigeration air accommodating cavity, 182 is a second-stage refrigeration air accommodating cavity, 183 is a third-stage refrigeration air accommodating cavity, and 184 is a fourth-stage refrigeration air accommodating cavity;
19 is a first fan;
201 is a first temperature sensor, 202 is a second temperature sensor, 203 is a third temperature sensor, 204 is a fourth temperature sensor, 205 is a fifth temperature sensor, 206 is a sixth temperature sensor, 207 is a seventh temperature sensor;
21 is a dew point sensor; 24 is an intermediate support plate;
221 is a first temperature and humidity sensor, and 222 is a second temperature and humidity sensor;
a first flow sensor is indicated at 231 and a second flow sensor is indicated at 232.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 to 2, the invention provides a trial run test system of a pulse type engine, which comprises a hollow temperature test box 1;
the temperature test box 1 is respectively connected with an engine ignition system and an air supply system;
a pulsating engine 100 to be tested is arranged in the temperature test box 1;
the air supply system is used for conveying dry air with target high temperature or target low temperature to the inner cavity of the temperature test box 1;
and the engine ignition system is used for igniting and starting the pulse type engine.
The target high temperature and the target low temperature may be set according to the requirements of the test, for example, the target high temperature may be 85 ℃ and the target low temperature may be-55 ℃.
In the invention, in particular, the engine ignition system is arranged at the bottom of the inner cavity of the temperature test box 1;
the engine ignition system comprises a fuel subsystem and a combustion-supporting air intake subsystem;
the fuel subsystem comprises an igniter 2, an oil pump 3, an oil tank 4 and a platform scale 5 and is used for conveying fuel to the pulse type engine 100;
the combustion-supporting gas inlet subsystem comprises a starting gas cylinder group 6 and an electric explosion valve 7 and is used for conveying high-pressure combustion-supporting gas to the pulse type engine 100;
the igniter 2 is arranged in the temperature test box 1 and is communicated with the inner cavity of a combustion chamber 101 of the pulse type engine 100;
an igniter 2 for igniting fuel in a combustion chamber 101 of a pulse engine 100;
an air inlet nozzle 102 and a spray pipe 103 on the pulse engine are communicated with the inner cavity of the combustion chamber 101;
an oil outlet of an oil outlet pipeline on the oil pump 3 is communicated with an inner cavity of a combustion chamber 101 of the pulse engine 100 and is used for spraying fuel oil to the combustion chamber 101;
an oil inlet of the oil pump 3 is communicated with an oil outlet of an oil tank 4;
fuel oil is stored in the oil tank 4 in advance;
an oil tank 4 positioned on top of a platform balance 5;
the air outlet of the gas cylinder group 6 is connected with an air inlet nozzle 102 on the pulse type engine 100 through an electric explosion valve 7;
high-pressure combustion-supporting gas (such as oxygen) is stored in the starting gas cylinder group 6 in advance;
in particular, the pulse engine 100 is arranged on an intermediate support plate 24 fixed on the inner wall of the temperature test chamber 1.
It should be noted that, for the present invention, when the pulse engine performs the high-temperature and low-temperature test run, firstly, the engine is placed in the temperature test box 1, the pulse engine is connected with the igniter 2 and the combustion-supporting air intake subsystem (including the starting gas cylinder group 6 and the electric explosion valve 7) in the temperature test box 1, and the temperature test box 1 provides a temperature environment;
then, starting an air supply system of the temperature test box 1 to carry out heating or cooling operation, and keeping the pulse type engine at the target temperature for a specified time after the target temperature (such as the target high temperature or the target low temperature) is reached;
then, after the heat preservation is finished, the ignition is prepared at the temperature, and during an ignition test, the gas cylinder group 6 is started to input high-pressure combustion-supporting gas into the air inlet nozzle 102 of the pulse engine 100 through the control of the electric explosion valve 7;
then, the fuel is sent to the combustion chamber 101 through the oil pump 3, the igniter 2 is ignited, thereby the pulse type engine starts the combustion operation, the gas is discharged from the nozzle 103 after the combustion,
it should be noted that, due to the inertia effect of the gas flow, the pressure in the combustion chamber is less than the atmospheric pressure in the temperature test chamber 1, the air in the temperature test chamber 1 flows into the combustion chamber, and the oil pump included in the fuel subsystem continues to supply oil, so that the cycle operation of the pulse type engine is realized.
In a specific implementation manner, the engine ignition system further comprises a control unit 8;
the control unit 8 is respectively connected with the control end of the oil pump 3, a pressure sensor and an oil supply temperature sensor;
the pressure sensor and the oil supply temperature sensor are respectively arranged on an oil outlet pipeline of the oil pump 3, are respectively used for collecting the output oil pressure and the oil supply temperature of the oil pump 3 and then are sent to the control unit 8;
and the control unit 8 is used for sending a closing control signal to the oil pump to stop the operation of the oil pump when the output oil pressure of the oil pump 3 is greater than a preset oil pressure value.
In particular, the control unit 8 is connected with a stabilized voltage power supply 9;
the regulated power supply 9 is connected with a 220V alternating current power supply and is used for converting the 220V alternating current voltage into an operating voltage required by the control unit 8.
In particular implementation, the engine ignition system further comprises a control system 10;
the platform scale 5 is used for measuring the overall mass of the oil tank 4 in real time and then sending the measured mass to the control system 10;
the control system 10 is respectively connected with the data output end of the platform balance 5 and the control unit 8, and is used for obtaining the fuel quality in the fuel tank 4 according to the quality of the fuel tank 4 (the fuel quality is obtained by subtracting the empty fuel tank quality from the current fuel tank 4 quality), and sending a fuel pump closing trigger signal to the control unit 8 when the fuel tank 4 quality is smaller than a preset fuel tank quality value;
and the control unit 8 is configured to send a closing control signal to the oil pump to stop the operation of the oil pump after receiving the oil pump closing trigger signal sent by the control system 10.
In particular, the platform balance 5 is an electronic platform balance with a signal output function, which is mature in the prior art.
It should be noted that, for the engine ignition system of the present invention, the whole ignition process specifically includes: test parameters (such as preset fuel tank mass value) are set outside the control system 10, and the fuel quantity of the fuel tank is read through the platform balance 5; the control unit 8 controls the oil pump 3 to output oil pressure in a closed loop manner through oil pressure data of the pressure sensor, and judges the oil supply temperature through the oil supply temperature sensor. And the electric explosion valve 7 is used for realizing starting control and medium isolation of high-pressure air inlet. The igniter 2 is ignited to enable the pulse type engine to work in a combustion mode, the combusted gas is discharged from the spray pipe, and the whole control unit 8 is powered through a stabilized voltage power supply 9.
In the invention, in a concrete implementation, the air supply system comprises an air filter 11, a first dryer 12, a medium temperature refrigerator 13, a second dryer 14, a low temperature refrigerating unit 15, a heater 16 and an exhaust fan 17;
the air inlet of the air filter 11 is communicated with the air environment outside the temperature test box;
an air outlet of the air filter 11 is communicated with a first-stage refrigerating air inlet of the intermediate temperature refrigerator 13 through the first-stage refrigerating air accommodating cavity 181 (namely, the air outlet of the air filter 11 is connected with a first air inlet of the first-stage refrigerating air accommodating cavity 181, and a first air outlet of the first-stage refrigerating air accommodating cavity 181 is communicated with a first-stage refrigerating air inlet of the intermediate temperature refrigerator 13);
a first-stage refrigerating air outlet of the medium temperature refrigerator 13 is communicated with a second air inlet of the first-stage refrigerating air accommodating cavity 181;
a second air outlet of the first-stage refrigerating air accommodating cavity 181 is communicated with an air inlet of the first fan 19; it should be noted that the first-stage refrigerated air accommodating cavity 181 includes a first-stage dry air accommodating sub-cavity and a first-stage refrigerated air accommodating sub-cavity which are isolated from each other, a first air inlet and a first air outlet of the first-stage refrigerated air accommodating cavity 181 are located on the first-stage dry air accommodating sub-cavity, and a second air inlet and a second air outlet of the first-stage refrigerated air accommodating cavity 181 are located on the first-stage refrigerated air accommodating sub-cavity;
an air outlet of the first fan 19 is communicated with an air inlet of the first dryer 12;
a dry air outlet of the first dryer 12 is communicated with a second-stage refrigerating air inlet of the moderate temperature refrigerator 13 through a second-stage refrigerating air accommodating cavity 182 (namely, the dry air outlet of the first dryer 12 is connected with a first air inlet of the second-stage refrigerating air accommodating cavity 182, and a first air outlet of the second-stage refrigerating air accommodating cavity 182 is communicated with the second-stage refrigerating air inlet of the moderate temperature refrigerator 13);
a second-stage refrigerating air outlet of the intermediate temperature refrigerator 13 is communicated with a second air inlet of the second-stage refrigerating air accommodating cavity 182;
a second air outlet of the second stage refrigerated air containment cavity 182 communicating with the air inlet of the second dryer 14; it should be noted that the second-stage refrigerated air accommodating cavity 182 includes a second-stage dry air accommodating sub-cavity and a second-stage refrigerated air accommodating sub-cavity which are isolated from each other, a first air inlet and a first air outlet of the second-stage refrigerated air accommodating cavity 182 are located on the second-stage dry air accommodating sub-cavity, and a second air inlet and a second air outlet of the second-stage refrigerated air accommodating cavity 182 are located on the second-stage refrigerated air accommodating sub-cavity;
the dry air outlet of the second dryer 14 is communicated with the third-stage refrigeration air inlet of the low-temperature refrigeration unit 15 through the third-stage refrigeration air accommodating cavity 183 (that is, the dry air outlet of the second dryer 14 is connected with the first air inlet of the third-stage refrigeration air accommodating cavity 183, and the first air outlet of the third-stage refrigeration air accommodating cavity 183 is communicated with the third-stage refrigeration air inlet of the low-temperature refrigeration unit 15);
a third-stage refrigerating air outlet of the low-temperature refrigerating unit 15 is communicated with a second air inlet of the third-stage refrigerating air accommodating cavity 183;
the second air outlet of the third-stage refrigerating air accommodating cavity 183 is communicated with the fourth-stage refrigerating air inlet of the low-temperature refrigerating unit 15 through the fourth-stage refrigerating air accommodating cavity 184 (i.e. the second air outlet of the third-stage refrigerating air accommodating cavity 183 is connected with the first air inlet of the fourth-stage refrigerating air accommodating cavity 184, and the first air outlet of the fourth-stage refrigerating air accommodating cavity 184 is communicated with the fourth-stage refrigerating air inlet of the low-temperature refrigerating unit 15); it should be noted that the third-stage refrigerating air accommodating cavity 183 includes a third-stage dry air accommodating sub-cavity and a third-stage refrigerating air accommodating sub-cavity which are isolated from each other, a first air inlet and a first air outlet of the third-stage refrigerating air accommodating cavity 183 are located on the third-stage dry air accommodating sub-cavity, and a second air inlet and a second air outlet of the third-stage refrigerating air accommodating cavity 183 are located on the third-stage refrigerating air accommodating sub-cavity;
a fourth-stage refrigeration air outlet of the low-temperature refrigeration unit 15 is communicated with a second air inlet of the fourth-stage refrigeration air accommodating cavity 184; it should be noted that the fourth-stage refrigeration air accommodating cavity 184 includes a first fourth-stage refrigeration air accommodating cavity and a second fourth-stage refrigeration air accommodating cavity that are isolated from each other, a first air inlet and a first air outlet of the fourth-stage refrigeration air accommodating cavity 184 are located on the first fourth-stage refrigeration air accommodating cavity, and a second air inlet and a second air outlet of the fourth-stage refrigeration air accommodating cavity 184 are located on the second fourth-stage refrigeration air accommodating cavity;
the second air outlet of the fourth stage refrigerating air accommodating cavity 184 is communicated with the air inlet of the temperature test chamber 1 through a connecting pipeline provided with the heater 16.
In particular, the air outlet of the temperature test box 1 is communicated with the air inlet of the exhaust fan 17 through a connecting pipeline;
and an air outlet of the exhaust fan 17 is communicated with the air environment outside the temperature test box 1.
In particular, the dehumidified waste gas outlet of the first dryer 12 is communicated with the air environment outside the temperature test chamber;
the dehumidified waste gas outlet of the second dryer 14 is communicated with the air environment outside the temperature test chamber.
In particular, a first temperature sensor 201 and a second temperature sensor 202 are respectively arranged on the first-stage refrigerating air accommodating cavity 181 and the second-stage refrigerating air accommodating cavity 182;
a third temperature sensor 203 and a dew point sensor 21 are arranged on a connecting pipeline between a dry air outlet of the second dryer 14 and a third-stage refrigeration air inlet of the low-temperature refrigeration unit 15;
a fourth temperature sensor 204 is arranged on an air outlet of the third-stage refrigerating air accommodating cavity 183;
a fifth temperature sensor 205 is disposed at the air outlet of the fourth stage refrigerating air accommodating cavity 184.
In particular, a first temperature and humidity sensor 221 is arranged on the air filter 11;
a second temperature and humidity sensor 222 and a first flow sensor 231 are arranged on a connecting pipeline between the air outlet of the heater 16 and the air inlet of the temperature test box 1;
a second flow sensor 232, a sixth temperature sensor 206 and a seventh temperature sensor 207 are arranged on a connecting pipeline between the air outlet of the temperature test box 1 and the air inlet of the exhaust fan 17.
It should be noted that, according to the present invention, the air outside the temperature test chamber 1 is filtered by the air filter 11, enters the intermediate temperature refrigerator 13 for the first stage refrigeration, enters the first dryer 12 for the first drying after the refrigeration, enters the intermediate temperature refrigerator 13 for the second stage refrigeration, enters the second dryer 14 for the second drying after the refrigeration, so that the dew point of the air is reduced to-55 ℃, and the dehumidified exhaust gas is exhausted from the exhaust system provided on the second dryer 14. Then, depending on the set final target temperature, the temperature of the drying air may be lowered to the target low temperature by the two-stage heat exchange of the low temperature refrigerator group 15 (for the third stage refrigeration and the fourth stage refrigeration), or raised to the target high temperature by the heater 16.
It should be noted that, for the present invention, the exhaust system of the temperature test chamber 1 specifically includes the exhaust fan 17, and the exhaust fan 17 discharges the exhaust gas generated by the combustion chamber of the engine to the outside of the temperature test chamber 1, and the exhaust system has the function of adjusting the exhaust air volume according to the air supply volume, so as to achieve the purpose of keeping the pressure balance inside and outside the temperature test chamber.
For the invention, the air supply system comprises a dryer system (specifically comprising a first dryer and a second dryer), the dryer adopts a mature combined rotary wheel dehumidification unit in the prior art, air required by the test is cooled by a medium temperature refrigerator 13 (namely a first-stage cold heat exchanger), and water vapor in the air is changed into condensed water and separated out along with the reduction of the temperature of the air, so that the absolute water content in the air is reduced, and freezing dehumidification is realized. And then, a rotating wheel dehumidification section in the first dryer is used for dehumidification, the dehumidification rotating wheel is divided into a treatment area and a regeneration area inside the dehumidification section, the whole dehumidification process is a continuous process, when the gas passes through the dehumidification treatment area, the water vapor in the dehumidification rotating wheel is adsorbed by the moisture absorption medium in the rotating wheel, the water vapor is subjected to phase change at the same time and releases latent heat, the rotating wheel is gradually saturated due to the adsorption of the moisture, and the gas is changed into hot dry gas due to the reduction of the water vapor and the release of the latent heat. Meanwhile, the other path of air in the regeneration area is heated by the heater to become high-temperature gas with the temperature of more than 120 ℃ and passes through the saturated rotating wheel after moisture absorption, so that the moisture absorbed in the rotating wheel is evaporated, and the dehumidification capacity of the dryer is ensured. The system fully utilizes the advantages of two dehumidification methods of freezing dehumidification and dehumidification rotary wheels, and is suitable for various climatic environments.
For the invention, the low-temperature refrigerating unit 15 is a conventional two-stage compression refrigerating unit, comprises 1 set of single-stage mechanical refrigerating unit and 1 set of overlapping refrigerating unit, has a high-efficiency air suction and exhaust valve assembly, adopts an air-cooled condenser, selects a high-efficiency energy-saving shell-and-tube heat exchanger, adopts a copper tube with fins rolled on the outer surface as a heat transfer tube, has the advantages of high heat conductivity coefficient and large heat exchange area, and simultaneously has a remote communication interface for remote control.
For the present invention, in particular, the air fin heater is used as the heater 16, which has the advantage of quick response.
For the specific implementation of the invention, the temperature sensor is specifically an armored PT100 platinum resistance sensor. The sensor has rapid temperature response, the temperature application range is-100-200 ℃, and the sensor has an impact-resistant soft armor shell.
For the specific implementation of the invention, the temperature and humidity sensor is an industrial temperature and humidity sensor which can be used in a severe environment, and has the advantages of high measurement precision, good stability and quick response.
For the invention, in particular, the exhaust system of the temperature test box 1 adopts a high-temperature resistant exhaust pipeline and an exhaust fan 17.
For the present invention, in a specific implementation, the air supply system further includes an air supply control unit, which is used to connect with the second temperature and humidity sensor 222;
the second temperature and humidity sensor 222 is used for detecting the temperature of air to enter the temperature test box 1 in real time and then sending the air to the air supply control unit;
the air supply control unit is used for receiving the real-time air temperature which is sent by the second temperature and humidity sensor 222 and is about to enter the temperature test box 1;
the air supply control unit is used for comparing the real-time air temperature with the target high temperature according to a target high temperature test instruction input by a user when the user needs to perform a test run test on the pulse type engine at the target high temperature (namely preset high temperature), sending an adjusting control signal to the heater 16 if the real-time air temperature is less than the target high temperature, increasing the power output of the heater 16 until the real-time air temperature is equal to the target high temperature, simultaneously sending a closing control signal to the medium temperature refrigerator 13 and the low temperature refrigerator unit 15, and closing the medium temperature refrigerator 13 and the low temperature refrigerator unit 15;
when a user needs to perform a test run on the pulse type engine at a target low temperature (namely a preset low temperature), the real-time air temperature is compared with the target low temperature according to a target low temperature test instruction input by the user, if the real-time air temperature is greater than the target low temperature, a regulation control signal is sent to the intermediate temperature refrigerator 13 and the low temperature refrigerator set 15, the power output of the intermediate temperature refrigerator 13 and the low temperature refrigerator set 15 is increased until the real-time air temperature is equal to the target low temperature, a closing control signal is sent to the heater 16 at the same time, and the heater 16 is closed.
For the air supply system, the heating output is not generated at constant low temperature, the refrigerating output is not generated at constant high temperature, and the corresponding refrigerating and heating devices are only started during pressure reduction and pressure rise.
Based on the above structural design, the temperature test chamber 1 can provide constant or circulating high and low temperature environments, so as to keep the temperature of the engine for a specified time.
In the invention, in particular, an oil tank 4, a platform scale 5 and a starting gas cylinder group 6 of an ignition system need to be integrally arranged at the bottom of a temperature test box 1;
in particular, the igniter 2, the oil pump 3, the electric explosion valve 7, the control unit 8, the voltage-stabilized power supply 9 and the control system 10 are products which are directly purchased in the market and mature in the prior art;
in particular, the air filter 11, the first dryer 12, the medium-temperature refrigerator 13, the second dryer 14, the low-temperature refrigerating unit 15, the heater 16 and the exhaust fan 17 of the air supply system are all products which are directly purchased in the market and mature in the prior art; the intermediate temperature refrigerator 13 and the low temperature refrigerator set 15 are both existing two-stage compression refrigerator sets.
In the present invention, the first dryer 12 and the second dryer 14 are well-known dryers, such as ZLB-D/Z-2000 combined rotary dehumidifier available from purey dehumidifier, ltd. The first dryer 12 is used for drying the low-temperature gas after being filtered and subjected to the first-stage refrigeration in the tank so as to reduce the relative humidity of the supplied gas; the second dryer 14 is used for drying the low-temperature gas subjected to the second-stage refrigeration in the refrigerator, so as to reduce the dew point temperature of the supplied gas and prevent the supplied gas from being condensed into water in the subsequent refrigeration process.
Specifically, the compressors of the medium temperature refrigerator 13 and the low temperature refrigerator set 15 are both germany bizel (Bitzer) semi-closed piston compressors, the medium temperature refrigerator 13 and the low temperature refrigerator set 15 are both two-stage refrigeration equipment, and can realize two-stage refrigeration, and specifically, both the medium temperature refrigerator 13 and the low temperature refrigerator set can be composed of 1 set of the existing known and technically mature single-stage refrigeration system and 1 set of the existing known and technically mature cascade refrigeration system. The medium temperature refrigerator 13 is used for performing first-stage refrigeration and second-stage refrigeration on air, and the low temperature refrigerator unit 15 is used for performing third-stage refrigeration and fourth-stage refrigeration on air in the refrigerator so as to meet the requirement of low temperature.
In particular, the heater 16 is an existing heating device, for example, an air fin heater of model SZL (B) manufactured by tai ruid heat exchange device limited may be used to heat the air in the tank, so as to meet the high temperature requirement for the air.
Based on the technical scheme, the trial run test system of the pulse engine solves the problems that the conventional ground trial run test of the pulse engine is not comprehensive in examination and cannot efficiently and quickly carry out high-temperature and low-temperature trial run tests. According to the invention, the engine ignition system is arranged in the temperature test box, and the air supply system is arranged outside the temperature test box, so that the pulse type engine can be subjected to test run in high-temperature and low-temperature environments in the test box, a large amount of manpower and material resources are saved, meanwhile, the pulse type engine is not influenced by external environments, and great convenience is provided for checking the environmental adaptability of the engine in an ignition state.
For the invention, the ignition system of the engine is integrated at the bottom of the test box, so that repeated disassembly and assembly are avoided; the igniter is arranged in the temperature test box and is connected with a combustion chamber of the pulse type engine. The ignition system is integrated in the test box, so that the problems of installation, power supply and stability of equipment in the test run process can be solved, and the test run efficiency is improved;
in addition, the pulsating air inlet nozzle is arranged in the box and used for ignition starting of the engine, and the control system and the stabilized voltage power supply are arranged outside the test box, so that the operation of a tester is facilitated.
The air supply system provided by the invention provides constant-temperature air for the test run of the engine, ensures the oxygen content required by the pulse engine during the test run, simultaneously ensures that the temperature in the temperature test box does not change along with the entering of external air, has an exhaust function, exhausts waste gas generated during the test of the engine, and ensures that the exhaust amount is correspondingly adjusted according to the air inflow so as to ensure the pressure balance in the test box.
The temperature test box can provide constant or circulating high and low temperature environments, so that the pulse type engine can be conveniently examined, the problem that the pulse type engine test run temperature environment is difficult to meet in the traditional method is solved, and the purpose of completing the high and low temperature test run with low cost and high efficiency is achieved.
Compared with the prior art, the trial run test system of the pulse type engine provided by the invention has the following beneficial effects:
1. the constant-temperature air supply system for the test is arranged outside the temperature test box and used for supplementing oxygen required by the engine during test run, and meanwhile, the air exhaust system is provided for exhausting waste gas of the engine, and the constant-temperature air supply system plays a role in keeping pressure balance inside and outside the temperature test box.
2. According to the invention, the ignition system is arranged in the temperature test box, and all the used equipment is integrated at the bottom of the test box, so that system and line faults caused by repeated assembly and disassembly are avoided;
3. the trial run test system can meet the high-temperature and low-temperature trial run tests of the pulse engine, improve the test efficiency, save the test cost and meet the test requirements.
Compared with the prior art, the trial run test system of the pulse engine provided by the invention has the advantages that the structural design is scientific, the problems of long preparation period, high site requirement, cost increase and the like of high-temperature and low-temperature trial run tests of the existing pulse engine can be solved, the environmental requirement and the equipment requirement of the engine in the trial run test under high-temperature and low-temperature environments can be met, the test efficiency is high, the test cost is low, the test system is not influenced by the external environment, and the like, and the practical significance is great.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and amendments can be made without departing from the principle of the present invention, and these modifications and amendments should also be considered as the protection scope of the present invention.
Claims (8)
1. A test run test system of a pulse type engine is characterized by comprising a hollow temperature test box (1);
the temperature test box (1) is respectively connected with an engine ignition system and an air supply system;
a pulsating engine (100) to be tested is arranged in the temperature test box (1);
the air supply system is used for conveying dry air with target high temperature or target low temperature to the inner cavity of the temperature test box (1);
the engine ignition system is used for igniting and starting the pulse type engine;
the engine ignition system comprises a fuel subsystem and a combustion-supporting air intake subsystem;
the fuel subsystem comprises an igniter (2), an oil pump (3), an oil tank (4) and a platform scale (5) and is used for conveying fuel to the pulse type engine (100);
the combustion-supporting gas inlet subsystem comprises a starting gas cylinder group (6) and an electric explosion valve (7) and is used for conveying high-pressure combustion-supporting gas to the pulse engine (100);
the igniter (2) is arranged in the temperature test box (1) and is communicated with the inner cavity of a combustion chamber (101) of the pulse type engine (100);
an igniter (2) for igniting fuel in a combustion chamber (101) of a pulse engine (100);
an air inlet nozzle (102) and a spray pipe (103) on the pulse engine are communicated with the inner cavity of the combustion chamber (101);
an oil outlet of an oil outlet pipeline on the oil pump (3) is communicated with an inner cavity of a combustion chamber (101) of the pulse engine (100) and is used for spraying fuel oil to the combustion chamber (101);
an oil inlet of the oil pump (3) is communicated with an oil outlet of an oil tank (4);
fuel oil is stored in the oil tank (4) in advance;
the oil tank (4) is positioned at the top of one platform scale (5);
an air outlet of the gas cylinder group (6) is started and is connected with an air inlet nozzle (102) on the pulse type engine (100) through an electric explosion valve (7);
high-pressure combustion-supporting gas is stored in the starting gas bottle group (6) in advance.
2. A trial run test system for a pulse engine according to claim 1, wherein the engine ignition system further comprises a control unit (8);
the control unit (8) is respectively connected with the control end of the oil pump (3), a pressure sensor and an oil supply temperature sensor;
the pressure sensor and the oil supply temperature sensor are respectively arranged on an oil outlet pipeline of the oil pump (3), are respectively used for collecting the output oil pressure and the oil supply temperature of the oil pump (3), and then are sent to the control unit (8);
and the control unit (8) is used for sending a closing control signal to the oil pump to stop the operation of the oil pump when the output oil pressure of the oil pump (3) is greater than a preset oil pressure value.
3. The trial run test system for pulse type engines according to claim 2, wherein the ignition system further comprises a control system (10);
the platform scale (5) is used for measuring the overall mass of the oil tank (4) in real time and then sending the measured mass to the operating system (10);
the control system (10) is respectively connected with the data output end of the platform scale (5) and the control unit (8) and is used for obtaining the fuel quality in the fuel tank (4) according to the quality of the fuel tank (4) and sending a fuel pump closing trigger signal to the control unit (8) when the quality of the fuel tank (4) is smaller than a preset fuel tank quality value;
and the control unit (8) is used for sending a closing control signal to the oil pump to stop the operation of the oil pump after receiving the oil pump closing trigger signal sent by the control system (10).
4. The trial run test system of a pulse type engine according to any one of claims 1 to 3, wherein the air supply system comprises an air filter (11), a first dryer (12), a medium temperature refrigerator (13), a second dryer (14), a low temperature refrigerator set (15), a heater (16) and an exhaust fan (17);
the air inlet of the air filter (11) is communicated with the air environment outside the temperature test box;
an air outlet of the air filter (11) is connected with a first air inlet of the first-stage refrigerating air accommodating cavity (181), and a first air outlet of the first-stage refrigerating air accommodating cavity (181) is communicated with a first-stage refrigerating air inlet of the medium temperature refrigerator (13);
a first-stage refrigerating air outlet of the medium temperature refrigerator (13) is communicated with a second air inlet of the first-stage refrigerating air accommodating cavity (181);
a second air outlet of the first-stage refrigerating air accommodating cavity (181) is communicated with an air inlet of the first fan (19);
an air outlet of the first fan (19) is communicated with an air inlet of the first dryer (12);
a dry air outlet of the first dryer (12) is connected with a first air inlet of a second-stage refrigerating air accommodating cavity (182), and a first air outlet of the second-stage refrigerating air accommodating cavity (182) is communicated with a second-stage refrigerating air inlet of the medium temperature refrigerator (13);
a second-stage refrigerating air outlet of the medium temperature refrigerator (13) is communicated with a second air inlet of the second-stage refrigerating air accommodating cavity (182);
a second air outlet of the second-stage refrigerating air accommodating cavity (182) is communicated with an air inlet of the second dryer (14);
a dry air outlet of the second dryer (14) is connected with a first air inlet of a third-stage refrigerating air accommodating cavity (183), and a first air outlet of the third-stage refrigerating air accommodating cavity (183) is communicated with a third-stage refrigerating air inlet of the low-temperature refrigerating unit (15);
a third-stage refrigeration air outlet of the low-temperature refrigeration unit (15) is communicated with a second air inlet of the third-stage refrigeration air accommodating cavity (183);
a second air outlet of the third-stage refrigeration air accommodating cavity (183) is connected with a first air inlet of a fourth-stage refrigeration air accommodating cavity (184), and a first air outlet of the fourth-stage refrigeration air accommodating cavity (184) is communicated with a fourth-stage refrigeration air inlet of the low-temperature refrigeration unit (15);
a fourth-stage refrigeration air outlet of the low-temperature refrigeration unit (15) is communicated with a second air inlet of the fourth-stage refrigeration air accommodating cavity (184);
and a second air outlet of the fourth-stage refrigerating air accommodating cavity (184) is communicated with an air inlet of the temperature test box (1) through a connecting pipeline provided with a heater (16).
5. The trial run test system of the pulse type engine according to claim 4, wherein the air outlet of the temperature test chamber (1) is communicated with the air inlet of the exhaust fan (17) through a connecting pipe;
and an air outlet of the exhaust fan (17) is communicated with the air environment outside the temperature test box (1).
6. The trial run test system for pulse type engines according to claim 4, wherein the dehumidified exhaust gas outlet port of the first dryer (12) is communicated with the air atmosphere outside the temperature test chamber;
and a dehumidifying waste gas outlet of the second dryer (14) is communicated with the air environment outside the temperature test box.
7. The trial run test system of the pulse type engine according to claim 4, wherein the first stage refrigerating air accommodating cavity (181) and the second stage refrigerating air accommodating cavity (182) are respectively provided with a first temperature sensor (201) and a second temperature sensor (202);
a third temperature sensor (203) and a dew point sensor (21) are arranged on a connecting pipeline between a dry air outlet of the second dryer (14) and a third-stage refrigeration air inlet of the low-temperature refrigeration unit (15);
a fourth temperature sensor (204) is arranged on an air outlet of the third-stage refrigerating air accommodating cavity (183);
a fifth temperature sensor (205) is arranged on an air outlet of the fourth-stage refrigerating air accommodating cavity (184);
a first temperature and humidity sensor (221) is arranged on the air filter (11);
a second temperature and humidity sensor (222) and a first flow sensor (231) are arranged on a connecting pipeline between the air outlet of the heater (16) and the air inlet of the temperature test box (1);
and a second flow sensor (232), a sixth temperature sensor (206) and a seventh temperature sensor (207) are arranged on a connecting pipeline between the air outlet of the temperature test box (1) and the air inlet of the exhaust fan (17).
8. The trial run testing system of the pulse type engine according to claim 4, wherein the air supply system further comprises an air supply control unit for connecting with the second temperature and humidity sensor (222);
a second temperature and humidity sensor (222) is arranged on a connecting pipeline between the air outlet of the heater (16) and the air inlet of the temperature test box (1);
the second temperature and humidity sensor (222) is used for detecting the temperature of air entering the temperature test box (1) in real time and then sending the air to the air supply control unit;
the air supply control unit is used for receiving the real-time air temperature which is sent by the second temperature and humidity sensor (222) and is about to enter the temperature test box (1);
the air supply control unit is used for comparing the real-time air temperature with the target high temperature according to a target high temperature test instruction input by a user when the user needs to perform a test run test on the pulse type engine at the target high temperature, sending an adjusting control signal to the heater (16) if the real-time air temperature is smaller than the target high temperature, increasing the power output of the heater (16) until the real-time air temperature is equal to the target high temperature, simultaneously sending a closing control signal to the medium temperature refrigerator (13) and the low temperature refrigerator set (15), and closing the medium temperature refrigerator (13) and the low temperature refrigerator set (15);
when a user needs to perform a test run test on the pulse type engine at a target low temperature, the real-time air temperature is compared with the target low temperature according to a target low temperature test instruction input by the user, if the real-time air temperature is higher than the target low temperature, an adjusting control signal is sent to the medium-temperature refrigerator (13) and the low-temperature refrigerator set (15), the power output of the medium-temperature refrigerator (13) and the low-temperature refrigerator set (15) is increased until the real-time air temperature is equal to the target low temperature, a closing control signal is sent to the heater (16), and the heater (16) is closed.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211243766.3A CN115307918B (en) | 2022-10-12 | 2022-10-12 | Test run test system of pulse type engine |
| PCT/CN2023/093754 WO2024077947A1 (en) | 2022-10-12 | 2023-05-12 | Test run system for pulsating engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211243766.3A CN115307918B (en) | 2022-10-12 | 2022-10-12 | Test run test system of pulse type engine |
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| CN115307918A true CN115307918A (en) | 2022-11-08 |
| CN115307918B CN115307918B (en) | 2023-03-24 |
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| WO (1) | WO2024077947A1 (en) |
Cited By (1)
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| WO2024077947A1 (en) * | 2022-10-12 | 2024-04-18 | 天津航天瑞莱科技有限公司 | Test run system for pulsating engine |
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