阅读说明：本技术 一种液氧气氧双路可调供应系统 (Liquid oxygen and oxygen double-path adjustable supply system ) 是由 俞南嘉 周闯 赵增 韩树焘 李心瞳 于 2020-11-25 设计创作，主要内容包括：本发明提供了一种液氧气氧双路可调供应系统,包括多个流量控制装置,每个流量控制装置均包括多组流量调节电路、选择和比较电路、PID控制器、输出压力传感器和减压器,每组流量调节电路包括输入压力传感器和流量调节部件；每组流量调节电路分别与选择和比较电路以及输出压力传感器相连接,选择和比较电路与PID控制器相连接,输出压力传感器与选择和比较电路相连接,PID控制器与减压器相连接；该系统可同时满足气氧煤油供应需求和液氧煤油供应需求；液氧系统能够给气氧系统的氧气储罐充气,实现推进剂的协调共用,使推进剂实现最大化利用；通过调节音速喷嘴或汽蚀文氏管的开关状态,实现调节推进剂的供应流量。(The invention provides a liquid oxygen and oxygen double-path adjustable supply system which comprises a plurality of flow control devices, wherein each flow control device comprises a plurality of groups of flow regulating circuits, a selection and comparison circuit, a PID (proportion integration differentiation) controller, an output pressure sensor and a pressure reducer, and each group of flow regulating circuits comprises an input pressure sensor and a flow regulating component; each group of flow regulating circuits are respectively connected with a selection and comparison circuit and an output pressure sensor, the selection and comparison circuit is connected with a PID controller, the output pressure sensor is connected with the selection and comparison circuit, and the PID controller is connected with a pressure reducer; the system can simultaneously meet the supply requirements of gas oxygen kerosene and liquid oxygen kerosene; the liquid oxygen system can charge gas for an oxygen storage tank of the gas oxygen system, so that the coordinated sharing of the propellant is realized, and the maximum utilization of the propellant is realized; the supply flow of the propellant is adjusted by adjusting the on-off state of the sonic nozzle or the cavitation venturi.)

1. The liquid oxygen and oxygen double-path adjustable supply system is characterized by comprising a flow control system and a gas oxygen and liquid oxygen supply system;

the flow control system comprises a plurality of flow control devices, each of which comprises a plurality of sets of flow regulating circuits (1), a selection and comparison circuit (2), a PID controller (3), an output pressure sensor (5) and a pressure reducer (4), wherein each set of flow regulating circuit (1) comprises an input pressure sensor (11), a flow regulating component (12) and a pneumatic valve (13);

each group of the flow regulating circuits (1) is respectively connected with the selection and comparison circuit (2) and the output pressure sensor (5), the selection and comparison circuit (2) is connected with the PID controller (3), the output pressure sensor (5) is connected with the selection and comparison circuit (2), and the PID controller (3) is connected with the pressure reducer (4);

the input pressure sensor (11) is used for detecting a first current measurement pressure value before the flow regulating component (12);

the output pressure sensor (5) is used for detecting a second current measured pressure value behind the flow regulating component (12);

the selection and comparison circuit (2) is used for obtaining a first difference value according to the first current measurement pressure value and a first input target value, and comparing the first difference value with a first preset threshold value to obtain a first comparison result; obtaining a second difference value according to the second current measured pressure value and a second input target value, and comparing the second difference value with a second preset threshold value to obtain a second comparison result;

the PID controller (3) is used for controlling the pressure output value of the pressure reducer (4) according to the first comparison result and determining the working state of the combustion chamber according to the second comparison result;

the gas-oxygen-liquid-oxygen supply system comprises a high-pressure-liquid-oxygen storage tank (309), a first hand valve (310), a second hand valve (312), a first vaporizer (311) and a high-pressure-oxygen storage tank (328), wherein an outlet of the high-pressure-liquid-oxygen storage tank (309) is sequentially connected with the first hand valve (310), the first vaporizer (311) and the second hand valve (312), and the second hand valve (312) is connected with the high-pressure-oxygen storage tank (328).

2. The system for the two-way adjustable supply of liquid oxygen and oxygen according to claim 1, characterized in that the selection and comparison circuit (2) is configured to take the first current measured pressure value collected by the input pressure sensor (11) as the output pressure value when any one of the flow regulating circuits (1) is turned on; when at least two flow regulating circuits (1) are started, averaging the first current measured pressure values acquired by each input pressure sensor (11) to obtain an average value, and taking the average value as the output pressure value.

3. The system for the two-way adjustable supply of liquid oxygen and oxygen according to claim 1, characterized by the PID controller (3) being configured to take the absolute value of the first difference as the output voltage signal when the absolute value of the first difference is less than or equal to the first preset threshold; and when the first difference value is larger than the first preset threshold value, obtaining a first result by the first difference value through a PID control algorithm, taking the first result as the output voltage signal, and controlling the pressure output value of the pressure reducer (4).

4. The system for the two-way adjustable supply of liquid oxygen and oxygen according to claim 3, characterized by the PID controller (3) being configured to take the second difference value as the output pressure when the second difference value is less than or equal to the second preset threshold value, the output pressure satisfying the condition; when the second difference is greater than the second preset threshold, the output pressure does not meet a condition;

the output pressure meeting condition is that the output pressure enables the combustion chamber to normally work, and the output pressure not meeting condition is that the output pressure cannot enable the combustion chamber to normally work.

5. The system for the two-way adjustable supply of liquid oxygen and oxygen according to claim 1, characterized in that said flow regulation means (12) comprise a cavitation venturi and an acoustic velocity nozzle.

6. The system for the two-way adjustable supply of liquid oxygen and liquid oxygen as claimed in claim 1, further comprising a low-pressure liquid oxygen tank (302), a third hand valve (304), a fourth hand valve (306), a fifth hand valve (344), a sixth hand valve (305) and a seventh hand valve (315);

when the third hand valve (304), the fourth hand valve (306) and the fifth hand valve (344) are opened and the sixth hand valve (305), the first hand valve (310) and the seventh hand valve (315) are closed, the liquid oxygen of the low pressure liquid oxygen storage tank (302) is transferred into the high pressure liquid oxygen storage tank (309).

7. The system for the two-way adjustable supply of liquid oxygen and liquid oxygen as claimed in claim 6, wherein the system for the supply of liquid oxygen and liquid oxygen further comprises a first pneumatic valve (318) and a second pneumatic valve (319);

upon a first pre-cool, opening the third (304), fourth (306), and seventh (315) hand valves, and opening the first (318) and second (319) pneumatic valves;

when the first pre-cooling is completed, the third hand valve (304), the fourth hand valve (306), and the seventh hand valve (315) are closed, and the first pneumatic valve (318) and the second pneumatic valve (319) are closed.

8. The liquid oxygen double-path adjustable supply system as claimed in claim 1, further comprising a nitrogen supply system and a kerosene supply system;

the gas-oxygen liquid-oxygen supply system and the kerosene supply system are in parallel relation, and the gas-oxygen liquid-oxygen supply system and the kerosene supply system are respectively connected with the nitrogen supply system.

9. The liquid oxygen double-channel adjustable supply system as claimed in claim 8, wherein the nitrogen supply system comprises an eighth hand valve (103) and a high-pressure nitrogen storage tank (101), and the eighth hand valve (103) fills the high-pressure nitrogen storage tank (101) with nitrogen;

the kerosene supply system includes a high-pressure kerosene storage tank (204), a ninth-hand valve (203), and a tenth-hand valve (206), and when the ninth-hand valve (203) and the tenth-hand valve (206) are opened, kerosene is injected into the high-pressure kerosene storage tank (204) through the tenth-hand valve (206).

Technical Field

The invention relates to the technical field of rocket engines, in particular to a liquid oxygen and oxygen double-path adjustable supply system.

Background

In the field of liquid rocket engine supply systems, a currently common gas-oxygen kerosene supply system comprises a gas-oxygen path and a kerosene path, wherein each path of the gas-oxygen path and the kerosene path is a one-way system. When the gas-oxygen path and the kerosene path use a sonic nozzle or a cavitation venturi as an element for controlling the flow rate, the flow rate adjusting function is not provided during the operation.

At present, a liquid oxygen kerosene supply system or a gas oxygen kerosene supply system which is commonly used independently is used, and under the condition that both gas oxygen kerosene supply and liquid oxygen kerosene supply are needed, the system redundancy is caused by respectively using the liquid oxygen kerosene supply system or the gas oxygen kerosene supply system, the system quality is increased, and the system is not suitable for occasions such as aircrafts and the like which need to reduce the system quality.

Disclosure of Invention

In view of the above, the present invention provides a dual-path adjustable liquid oxygen and kerosene supply system, which can meet the supply requirements of gas oxygen and kerosene and liquid oxygen and kerosene; the liquid oxygen system can charge air to an oxygen storage tank of the gas oxygen system, and can realize the coordinated sharing of the propellant, so that the propellant is utilized to the maximum extent; the supply flow of the propellant is adjusted by adjusting the on-off state of the sonic nozzle or the cavitation venturi.

In a first aspect, an embodiment of the present invention provides a liquid oxygen and oxygen dual-path adjustable supply system, where the system includes a flow control system and a gas oxygen and liquid oxygen supply system;

the flow control system comprises a plurality of flow control devices, each of which comprises a plurality of sets of flow regulating circuits 1, a selection and comparison circuit 2, a PID controller 3, an output pressure sensor 5 and a pressure reducer 4, wherein each set of flow regulating circuits 1 comprises an input pressure sensor 11, a flow regulating part 12 and a pneumatic valve 13;

each group of the flow regulating circuits 1 is respectively connected with the selection and comparison circuit 2 and the output pressure sensor 5, the selection and comparison circuit 2 is connected with the PID controller 3, the output pressure sensor 5 is connected with the selection and comparison circuit 2, and the PID controller 3 is connected with the pressure reducer 4;

the input pressure sensor 11 is configured to detect a first current measured pressure value before the flow rate adjusting component 12;

the output pressure sensor 5 is configured to detect a second current measured pressure value after the flow rate adjusting component 12;

the selection and comparison circuit 2 is configured to obtain a first difference value according to the first current measured pressure value and a first input target value, and compare the first difference value with a first preset threshold value to obtain a first comparison result; obtaining a second difference value according to the second current measured pressure value and a second input target value, and comparing the second difference value with a second preset threshold value to obtain a second comparison result;

the PID controller 3 is used for controlling the pressure output value of the pressure reducer 4 according to the first comparison result and determining the working state of the combustion chamber according to the second comparison result;

the gas-oxygen-liquid-oxygen supply system comprises a high-pressure-liquid-oxygen storage tank (309), a first hand valve (310), a second hand valve (312), a first vaporizer (311) and a high-pressure-oxygen storage tank (328), wherein an outlet of the high-pressure-liquid-oxygen storage tank (309) is sequentially connected with the first hand valve (310), the first vaporizer (311) and the second hand valve (312), and the second hand valve (312) is connected with the high-pressure-oxygen storage tank (328).

The embodiment of the invention provides a liquid oxygen and oxygen double-path adjustable supply system, which comprises a flow control system and an oxygen and liquid oxygen supply system; the flow control system comprises a plurality of flow control devices, each flow control device comprises a plurality of groups of flow regulating circuits, a selection and comparison circuit, a PID controller, an output pressure sensor and a pressure reducer, wherein each group of flow regulating circuits comprises an input pressure sensor and a flow regulating component; each group of flow regulating circuits are respectively connected with a selection and comparison circuit and an output pressure sensor, the selection and comparison circuit is connected with a PID controller, the output pressure sensor is connected with the selection and comparison circuit, and the PID controller is connected with a pressure reducer; the input pressure sensor is used for detecting a first current measurement pressure value before the flow regulating component; the output pressure sensor is used for detecting a second current measurement pressure value behind the flow regulating component; the selection and comparison circuit is used for obtaining a first difference value according to the first current measurement pressure value and the first input target value, and comparing the first difference value with a first preset threshold value to obtain a first comparison result; obtaining a second difference value according to the second current measured pressure value and a second input target value, and comparing the second difference value with a second preset threshold value to obtain a second comparison result; the PID controller is used for controlling the pressure output value of the pressure reducer according to the first comparison result and determining the working state of the combustion chamber according to the second comparison result, and the system can meet the supply requirements of gas oxygen kerosene and liquid oxygen kerosene simultaneously; the liquid oxygen system can charge air to an oxygen storage tank of the gas oxygen system, and can realize the coordinated sharing of the propellant, so that the propellant is utilized to the maximum extent; the supply flow of the propellant is adjusted by adjusting the on-off state of the sonic nozzle or the cavitation venturi.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic diagram of a flow control system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a flow control system according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a flow control principle according to an embodiment of the present invention;

FIG. 4 is a schematic view of a two-way adjustable liquid oxygen supply system according to a second embodiment of the present invention;

fig. 5 is a schematic structural view of a liquid oxygen-oxygen two-way adjustable supply system according to a second embodiment of the present invention.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. 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.

For the understanding of the present embodiment, the following detailed description will be given of the embodiment of the present invention.

The first embodiment is as follows:

fig. 1 is a schematic diagram of a flow control system according to an embodiment of the present invention.

Referring to fig. 1, the system comprises a plurality of flow control devices, each comprising a plurality of sets of flow regulating circuits 1, selection and comparison circuits 2, PID controllers 3, output pressure sensors 5 and pressure reducers 4, wherein each set of said flow regulating circuits 1 comprises an input pressure sensor 11, a flow regulating section 12 and a pneumatic valve 13;

each group of flow regulating circuits 1 are respectively connected with a selection and comparison circuit 2 and an output pressure sensor 5, the selection and comparison circuit 2 is connected with a PID controller 3, the output pressure sensor 5 is connected with the selection and comparison circuit 2, and the PID controller 3 is connected with a pressure reducer 4;

an input pressure sensor 11 for detecting a first current measured pressure value before the flow rate adjustment part 12;

an output pressure sensor 5 for detecting a second current measured pressure value after the flow rate adjustment part 12;

the selection and comparison circuit 2 is used for obtaining a first difference value according to the first current measurement pressure value and the first input target value, and comparing the first difference value with a first preset threshold value to obtain a first comparison result; obtaining a second difference value according to the second current measured pressure value and a second input target value, and comparing the second difference value with a second preset threshold value to obtain a second comparison result;

and a PID controller 3 for controlling a pressure output value of the pressure reducer 4 based on the first comparison result and determining an operating state of the combustion chamber based on the second comparison result.

Further, the selection and comparison circuit 2 is configured to, when any one of the flow rate adjustment circuits 1 is turned on, take a first current measurement pressure value acquired by the input pressure sensor 11 as an output pressure value; when the at least two flow rate adjusting circuits 1 are turned on, the first current measured pressure value acquired by each input pressure sensor 11 is averaged to obtain an average value, and the average value is used as an output pressure value.

Further, the PID controller 3 is configured to use the absolute value of the first difference as the output voltage signal when the absolute value of the first difference is less than or equal to a first preset threshold; and when the first difference value is larger than a first preset threshold value, obtaining a first result by using the first difference value through a PID control algorithm, taking the first result as an output voltage signal, and controlling the pressure output value of the pressure reducer 4.

Further, the PID controller 3 is configured to take the second difference value as an output pressure when the second difference value is less than or equal to a second preset threshold, and the output pressure satisfies a condition; when the second difference is larger than a second preset threshold, the output pressure does not meet the condition;

the output pressure can not enable the combustion chamber to work normally when the output pressure meets the condition.

Further, the flow regulating member 12 includes a cavitation venturi and a sonic nozzle.

Specifically, a plurality ofThe flow control devices may be 3, but are not limited to 3, in particular liquid oxygen flow control devices, oxygen flow control devices and kerosene flow control devices. Referring to fig. 2, the selection and comparison circuit includes a first selection and comparison circuit 401, a second selection and comparison circuit 402, and a third selection and comparison circuit 403, and the PID controller includes a first PID controller 404, a second PID controller 405, and a third PID controller 406, and since the principles of controlling the flow rates of the liquid oxygen flow control device, the oxygen flow control device, and the kerosene flow control device are similar, the description will be made here taking liquid oxygen as an example. Referring to fig. 3, the flow rate adjusting part includes a cavitation venturi and a sonic nozzle, a first cavitation venturi 321 and a second cavitation venturi 324 are provided in the liquid oxygen flow rate control device, a first input pressure sensor 320 is provided upstream of the first cavitation venturi 321, a second input pressure sensor 323 is provided upstream of the second cavitation venturi 324, and the first input pressure sensor 320 measures the pressure of the first cavitation venturi 321 as y₁The second input pressure sensor 323 measures the pressure of the second cavitation venturi 324 as y₂Downstream of which an output pressure sensor 326 is arranged to measure the pressure y of the first and second cavitation venturis 321, 324₃。

The pressure before the cavitation venturi determines the flow rate in the pipeline, and the pressure after the cavitation venturi determines whether the pressure input to the downstream combustion chamber and other components meets the requirements, so the pressures before and after the cavitation venturi are very important. Before use, a first input target value r and a second input target value w are respectively set in a cavitation venturi front pressure input signal source and a cavitation venturi rear pressure input signal source, and meanwhile, deviations of target pressure values are set in advance and are respectively xi and delta.

When the pipeline where the first cavitation venturi 321 is located is opened, the output pressure value is y₁(ii) a When the pipeline where the second cavitation venturi 324 is located is opened, the output pressure value is y₂(ii) a When the pipelines in which the first cavitation venturi 321 and the second cavitation venturi 324 are located are both opened, the output pressure value is (y)₁+y₂)/2。

The first input target value r is different from the front pressure of the cavitation venturi tube, the error is obtained as e, and if the absolute value of e is smaller than or equal to xi, the output is kept unchanged; if the absolute value of e is larger than xi, a PID control algorithm is adopted, the result of multiplying the error by a scaling factor Kp, the result of multiplying the accumulated error by a scaling factor Ki, and the result of multiplying the difference between two adjacent errors by a scaling factor Kd are summed, the value is u, the u is used as a voltage signal to control the pressure output value of the pressure reducer, and the pressure output value leads to the pressure change of the upstream and the downstream of the cavitation venturi tube after passing through a pipeline.

The second input target value after the cavitation venturi is compared with y₃And performing subtraction to obtain an error er. When the absolute value of er is less than or equal to delta, the output pressure meets the condition; when the absolute value of the er is larger than delta, the output pressure does not meet the condition, the output pressure meets the condition that the output pressure enables the combustion chamber to work normally, the output pressure does not meet the condition that the output pressure cannot enable the combustion chamber to work normally, and components such as a cavitation venturi and the like need to be replaced for adjustment. The kerosene flow control means requires adjustment of the first pressure reducer 117 and adjustment of the second pressure reducer 334 by the gas after the first pressure reducer 117.

Example two:

fig. 4 is a schematic view of a liquid oxygen and oxygen two-way adjustable supply system according to a second embodiment of the present invention.

The system comprises the flow control system, wherein the flow control system comprises a plurality of groups of flow regulating circuits 1, each group of flow regulating circuits 1 comprises an input pressure sensor 11, a flow regulating part 12 and a pneumatic valve 13, the pneumatic valve 13 is respectively connected with the flow regulating part 12 and an output pressure sensor 5, and the supply flow of the propellant is regulated by controlling the connection and disconnection of the flow regulating circuits 1; a schematic of the flow control system can be seen in fig. 1.

Referring to fig. 4, the supply system further includes a gas-oxygen-liquid-oxygen supply system, a nitrogen gas supply system, and a kerosene supply system; the gas-oxygen-liquid-oxygen supply system and the kerosene supply system are in parallel relation, and the gas-oxygen-liquid-oxygen supply system and the kerosene supply system are respectively connected with the nitrogen supply system. Wherein, the gas oxygen liquid oxygen supply system comprises a gas oxygen system and a liquid oxygen system.

The gas-oxygen-liquid-oxygen supply system comprises a high-pressure-liquid-oxygen storage tank 309, a first hand valve 310, a second hand valve 312, a first vaporizer 311 and a high-pressure-oxygen storage tank 328, wherein the outlet of the high-pressure-liquid-oxygen storage tank 309 is sequentially connected with the first hand valve 310, the first vaporizer 311 and the second hand valve 312, and the second hand valve 312 is connected with the high-pressure-oxygen storage tank 328.

Further, the gas oxygen liquid oxygen supply system further comprises a low-pressure liquid oxygen storage tank 302, a third hand valve 304, a fourth hand valve 306, a fifth hand valve 344, a sixth hand valve 305 and a seventh hand valve 315;

when third hand valve 304, fourth hand valve 306 and fifth hand valve 344 are opened and sixth hand valve 305, first hand valve 310 and seventh hand valve 315 are closed, the liquid oxygen from low pressure liquid oxygen reservoir 302 is transferred to high pressure liquid oxygen reservoir 309.

Further, the gas oxygen liquid oxygen supply system further includes a first pneumatic valve 318 and a second pneumatic valve 319;

when pre-chilled for the first time, the third, fourth, and seventh hand valves 304, 306, 315 are opened, and the first and second pneumatic valves 318, 319 are opened;

when the first pre-cool is complete, the third, fourth, and seventh hand valves 304, 306, 315 are closed, and the first and second pneumatic valves 318, 319 are closed.

Further, the nitrogen supply system comprises an eighth hand valve 103 and a high-pressure nitrogen storage tank 101, wherein the eighth hand valve 103 fills nitrogen into the high-pressure nitrogen storage tank 101;

the kerosene supply system includes a high-pressure kerosene tank 204, a ninth-hand valve 203, and a tenth-hand valve 206, and when the ninth-hand valve 203 and the tenth-hand valve 206 are opened, kerosene is injected into the high-pressure kerosene tank 204 through the tenth-hand valve 206.

Referring to the structural schematic diagram of the liquid oxygen and oxygen double-path adjustable supply system shown in fig. 5, when the liquid oxygen kerosene and the gas oxygen kerosene respectively work, the kerosene supply system is shared, and the requirements of the oxygen/kerosene power system which needs both liquid oxygen supply and gas oxygen supply can be met.

The high pressure liquid oxygen tank 309 utilizes the first vaporizer 311 to charge the high pressure oxygen tank 328 with high pressure liquid oxygen, enabling coordinated sharing of engine system oxidizer to maximize propellant utilization.

The nitrogen gas supply system comprises a high-pressure nitrogen gas storage tank 101, a first pressure gauge 102, a second pressure gauge 108, a third pressure gauge 113, a fourth pressure gauge 118, a fifth pressure gauge 123, a sixth pressure gauge 130, an eighth hand valve 103, an eleventh hand valve 104, a twelfth hand valve 106, a thirteenth hand valve 109, a fourteenth hand valve 110, a fifteenth hand valve 111, a sixteenth hand valve 114, a seventeenth hand valve 115, an eighteenth hand valve 116, a nineteenth hand valve 119, a twentieth hand valve 120, a twenty first hand valve 121, a twenty second hand valve 124, a twenty third hand valve 125, a twenty fourth hand valve 128, a twenty fifth hand valve 131, a twenty sixth hand valve 132, a first filter 105, a third pressure reducer 107, a fourth pressure reducer 112, a first pressure reducer 117, a fifth pressure reducer 122, a sixth pressure reducer 129, a first electromagnetic valve 126, a second electromagnetic valve 133, a first one-way valve 127, and a second one-way valve 134.

The high-pressure nitrogen storage tank 101 stores pure nitrogen for the extrusion and blowing of the nitrogen supply system. An outlet of the high-pressure nitrogen storage tank 101 is connected with a first pressure gauge 102, an eighth hand valve 103 and an eleventh hand valve 104, wherein the eighth hand valve 103 is mainly used for filling nitrogen into the high-pressure nitrogen storage tank, and the eleventh hand valve 104 is mainly used for providing high-pressure nitrogen to the downstream; the first pressure gauge 102 is used to display the pressure of the high pressure nitrogen reservoir.

Downstream of the eleventh hand valve 104, a first filter 105 is connected, which mainly filters out impurities in the nitrogen gas and supplies high-pressure purified nitrogen gas downstream. The back of the first filter 105 is respectively connected with a twelfth hand valve 106, a fifteenth hand valve 111, an eighteenth hand valve 116, a twenty-first hand valve 121 and a twenty-fourth hand valve 128, the back of the twelfth hand valve 106 is connected with a third pressure reducer 107, the back of the third pressure reducer 107 is connected with a second pressure gauge 108, a thirteenth hand valve 109 and a fourteenth hand valve 110, the back of the fourteenth hand valve 110 is connected with a high-pressure liquid oxygen storage tank 309, the third pressure reducer 107 and the front and rear elements thereof supply high-pressure gas to the high-pressure liquid oxygen storage tank 309, the pressure of the high-pressure gas is regulated through the third pressure reducer 107, and the on-off of gas supply to the high-pressure liquid oxygen storage tank 309 is controlled through the twelfth hand valve 106, the thirteenth hand valve 109 and the fourteenth hand valve 110.

When the twelfth hand valve 106 is opened, the fourteenth hand valve 110 is closed, the thirteenth hand valve 109 is opened, and the gas pressure after the third pressure reducer 107 can be dynamically adjusted; the thirteenth hand valve 109 is closed, the fourteenth hand valve 110 is opened, and high-pressure gas can be supplied to the high-pressure liquid oxygen storage tank 309; when the twelfth hand valve 106 is closed, the thirteenth hand valve 109 and the fourteenth hand valve 110 are opened, so that the pressure of the high pressure liquid oxygen storage tank 309 can be reduced or the high pressure liquid oxygen storage tank 309 and the gas in the pipeline can be exhausted.

A fifteenth hand valve 111, a fourth pressure reducer 112, a third pressure gauge 113, a sixteenth hand valve 114, a seventeenth hand valve 115, which are connected to the high-pressure kerosene tank 204 for supplying high-pressure gas thereto; an eighteenth hand valve 116, a first pressure reducer 117, a fourth pressure gauge 118, a nineteenth hand valve 119, a twentieth hand valve 120, which part is connected to a second pressure reducer 334 for providing pilot gas thereto.

The twenty-first hand valve 121, the fifth pressure reducer 122, the fifth pressure gauge 123, the twenty-second hand valve 124, the twenty-third hand valve 125, the first electromagnetic valve 126 and the first one-way valve 127 form a liquid oxygen blowing and removing path, wherein the combination form of the twenty-first hand valve 121, the fifth pressure reducer 122, the fifth pressure gauge 123, the second twenty-hand valve 124 and the twenty-third hand valve 125 is similar to that of the pipeline, and high-pressure blowing and removing gas is provided. The outlet of the first electromagnetic valve 126 is sequentially connected with the first check valve 127, wherein the first electromagnetic valve 126 is used for controlling the on-off of the gas in the path, and the first electromagnetic valve 126 has the characteristics of quick response and high sensitivity, and is connected to the outlet of the liquid oxygen blowing path, so that blowing can be immediately performed after the supply of the oxidant is finished, and the safety of the system is improved.

The first check valve 127 mainly prevents the oxidant from entering the liquid oxygen blowing-off path during supply, and the safety of the system is improved under the double protection action of the first solenoid valve 126 and the first check valve 127. The twenty-fourth hand valve 128, the sixth pressure reducer 129, the sixth pressure gauge 130, the twenty-fifth hand valve 131, the twenty-sixth pressure gauge 132, the second electromagnetic valve 133 and the second one-way valve 134 are similar to the liquid oxygen blowing-off circuit, and are not described herein again.

The kerosene supply system includes a high-pressure kerosene tank 204, a seventh pressure gauge 202, a first relief valve 201, a ninth hand valve 203, a tenth hand valve 206, a twenty-seventh hand valve 207, a twenty-eighth hand valve 210, a first pressure sensor 205, a second pressure sensor 211, a third pressure sensor 214, a fourth pressure sensor 217, a second filter 208, a third cavitation venturi 212, a fourth cavitation venturi 215, a third pneumatic valve 209, a fourth pneumatic valve 213, and a fifth pneumatic valve 216.

The high-pressure kerosene storage tank 204 is used for storing kerosene, and the kerosene can be added through the tenth hand valve 206 with the ninth hand valve 203 and the tenth hand valve 206 being opened, and the first safety valve 201, the seventh pressure gauge 202 and the ninth hand valve 203 are mounted on the high-pressure kerosene storage tank. The first safety valve 201 is mainly used for ensuring the safety of the high-pressure kerosene storage tank 204, when the pressure of the high-pressure kerosene storage tank 204 exceeds a set upper limit value, the first safety valve 201 is automatically opened to reduce the pressure of the high-pressure kerosene storage tank 204, and when the pressure is reduced below a set value, the first safety valve 201 is automatically closed.

The seventh pressure gauge 202 is mainly used for displaying the pressure value of the high-pressure kerosene storage tank 204 in real time, so that the pressure value is convenient to observe. The ninth hand valve 203 is mainly used for manually opening to reduce the pressure of the high-pressure kerosene tank 204 when the pressure of the high-pressure kerosene tank 204 is too high.

The first pressure sensor 205 is provided at the outlet of the high-pressure kerosene tank 204 so as to be able to acquire the outlet pressure of the high-pressure kerosene tank 204 in real time in a high-frequency manner during operation. The twenty-seventh hand valve 207 is a stop valve for controlling the connection and disconnection of the high-pressure kerosene storage tank 204 and the downstream, and the second filter 208 is used for filtering impurities in the high-pressure kerosene storage tank 204. The third pneumatic valve 209 can remotely control the on-off of the upstream and the downstream, the twenty-seventh hand valve 207 is kept normally open in the actual test process, and the third pneumatic valve 209 is used for controlling the on-off; the twenty-seventh hand valve 207 can be used to control on-off during the commissioning phase to improve the reliability of the shut-off fluid.

The twenty-eighth hand valve 210, when in an open state, may be used to fill the kerosene line prior to operation and to drain the liquid from the line after operation. The second pressure sensor 211 and the third pressure sensor 214 are used for monitoring the pressure before the third cavitation venturi 212 and the fourth cavitation venturi 215 in real time, and the pressure before the cavitation venturi and the flow rate in the cavitation state of the cavitation venturi are referred to the formula (1):

wherein q is_mFor the flow through the cavitation venturi, μ is the flow coefficient, related to the structure of the cavitation venturi, A_CIs the geometric area of the throat of the cavitation venturi, p is the density of the flowing liquid, p₀For cavitation of the venturi front pressure, p_SIs the saturated vapor pressure of the liquid flowing through.

Therefore, the flow rate of the cavitation venturi in the cavitation state is only related to the front pressure of the cavitation venturi, and the front pressure of the cavitation venturi can be controlled by adjusting the pressure of the fourth pressure reducer 112 to control the liquid pressure in the high-pressure kerosene storage tank 204.

A fourth pneumatic valve 213 and a fifth pneumatic valve 216 are respectively connected behind the third cavitation venturi 212 and the fourth cavitation venturi 215, and the on-off of the two paths can be controlled by the pneumatic valves. Here, three different flow rates can be supplied by opening the fourth pneumatic valve 213 and closing the fifth pneumatic valve 216, opening the fifth pneumatic valve 216 and closing the fourth pneumatic valve 213, and simultaneously opening the fourth pneumatic valve 213 and the fifth pneumatic valve 216. Here, not only two air-operated valves but also three or more air-operated valves are involved, and the adjustment of 7 different flow rates can be realized by controlling the on/off of the three air-operated valves, and the adjustment of 15 different flow rates can be realized by controlling the on/off of the four air-operated valves. Downstream of the fourth pneumatic valve 213 and the fifth pneumatic valve 216, a fourth pressure sensor 217 is installed for measuring the pressure of the supplied kerosene in real time.

The gas-oxygen liquid-oxygen supply system comprises a low-pressure liquid-oxygen tank 302, a high-pressure liquid-oxygen tank 309, a high-pressure oxygen tank 328, a second relief valve 301, a third relief valve 308, a fourth relief valve 327, an eighth pressure gauge 303, a ninth pressure gauge 329, a third hand valve 304, a sixth hand valve 305, a fourth hand valve 306, a twenty-ninth hand valve 307, a first hand valve 310, a second hand valve 312, a seventh hand valve 315, a thirty-hand valve 330, a thirty-first hand valve 331, a fifth hand valve 344, a fifth pressure sensor 313, a first input pressure sensor 320, a second input pressure sensor 323, a sixth pressure sensor 326, a seventh pressure sensor 335, an eighth pressure sensor 337, a ninth pressure sensor 340, a tenth pressure sensor 343, a first vaporizer 311, a coating layer 314, a third filter 316, a fourth filter 332, a flow sensor 317, a first pneumatic valve 319, a second pneumatic valve 318, a pneumatic valve 319, A sixth air-operated valve 322, a seventh air-operated valve 325, an eighth air-operated valve 336, a ninth air-operated valve 339, and a tenth air-operated valve 342.

The low-pressure liquid oxygen storage tank 302 is used for storing liquid oxygen for a long time, the pressure of the low-pressure liquid oxygen storage tank 302 is the pressure generated by vaporization of the liquid oxygen, a second safety valve 301 is installed on the low-pressure liquid oxygen storage tank 302, and when the pressure of the low-pressure liquid oxygen storage tank 302 exceeds a set value, the second safety valve 301 is automatically opened to reduce the pressure of the low-pressure liquid oxygen storage tank 302, so that the pressure of the low-pressure liquid oxygen storage tank 302 is ensured to be within a safety range.

An eighth pressure gauge 303 is installed at an outlet of the low-pressure liquid oxygen storage tank 302 and used for displaying the pressure of the low-pressure liquid oxygen storage tank 302 in real time so as to facilitate observation. The outlet of the low-pressure liquid oxygen storage tank 302 is connected with a third hand valve 304, a sixth hand valve 305 and a fourth hand valve 306, and liquid oxygen can be filled into and discharged from the low-pressure liquid oxygen storage tank 302 under the conditions that the fourth hand valve 306 is closed and the third hand valve 304 and the sixth hand valve 305 are opened; with the sixth hand valve 305 closed, the third hand valve 304 and the fourth hand valve 306 open, the propellant in the low pressure liquid oxygen tank 302 can be delivered to the downstream line; with fourth hand valve 306 closed, third hand valve 304 and sixth hand valve 305 open, the piping upstream of sixth hand valve 305 may be pre-chilled.

The high-pressure liquid oxygen storage tank 309 is used for storing liquid oxygen shortly before operation, and high-pressure gas is supplied to the high-pressure liquid oxygen storage tank 309 through the twelfth hand valve 106 so that the liquid oxygen flows downstream at a higher pressure. A twenty-ninth hand valve 307 and a third safety valve 308 are installed on the high-pressure liquid oxygen storage tank 309, and when liquid oxygen in the low-pressure liquid oxygen storage tank 302 is transferred into the high-pressure liquid oxygen storage tank 309, the twenty-ninth hand valve 307 is in an open state, so that the pressure balance between the gas in the liquid oxygen storage tank and the external environment in the transfer process is ensured.

The third safety valve 308 is automatically opened when the pressure of the high pressure liquid oxygen tank 309 exceeds a set value, thereby ensuring the safety of the high pressure liquid oxygen tank 309. The fifth pressure sensor 313 is installed at the outlet of the high pressure liquid oxygen storage tank 309, and is used for monitoring the outlet pressure of the high pressure liquid oxygen storage tank 309 in real time. The high pressure oxygen storage tank 328 is mainly used for storing high pressure oxygen, a fourth safety valve 327 is installed on the high pressure oxygen storage tank 328, and the fourth safety valve 327 is automatically opened when the pressure of the high pressure oxygen storage tank 328 exceeds a set value, so that the safety of the high pressure oxygen storage tank 328 is ensured.

The outlet of the high pressure liquid oxygen storage tank 309 is also connected with a first hand valve 310, a first vaporizer 311 and a second hand valve 312 in sequence, and the pipeline is mainly used for connecting the high pressure liquid oxygen storage tank 309 and the high pressure oxygen storage tank 328. Because two propellants of liquid oxygen and gas oxygen need to be used, if the two propellants are respectively filled and separately used, the filling process becomes complicated, the two propellants are difficult to be ensured to be simultaneously consumed in the actual use process, and the utilization rate of the propellants cannot reach the highest. By adopting the first vaporizer 311 as a pipeline, only liquid oxygen needs to be filled in the filling process, the flow becomes simple, the high-pressure oxygen storage tank 328 becomes small, and in the actual use process, the high-pressure oxygen storage tank 328 is filled with gas oxygen step by step according to the actual use requirement, so that the coordinated sharing of the liquid oxygen and the gas oxygen propellant is realized, and the propellant utilization rate is greatly improved.

The high-pressure liquid oxygen storage tank 309 passes through a fifth pressure sensor 313 and then reaches a seventh hand valve 315 through a transportation pipeline, and a coating layer 314 made of heat insulation materials is adopted in the pipeline to reduce heat exchange between the propellant in the pipeline and the outside so as to ensure that the low-temperature propellant liquid oxygen is always kept in a liquid state in the pipeline.

The seventh hand valve 315 is a stop valve, and is normally open during operation and normally closed during non-operation, so as to ensure that the upstream and downstream flows can still be effectively stopped when the first pneumatic valve 318 fails. The third filter 316 is used for filtering impurities contained in the liquid, and the flow sensor 317 is used for measuring the flow of the liquid in the pipeline in real time and feeding back the flow to the pressure control system in real time.

The first pneumatic valve 318 is a shut-off valve that can be remotely opened when needed and closed when not needed. The second pneumatic valve 319 mainly functions to discharge the low-temperature propellant liquid oxygen after pre-cooling, so that the seventh hand valve 315, the first pneumatic valve 318 and the second pneumatic valve 319 can be opened without opening the sixth pneumatic valve 322 and the seventh pneumatic valve 325, and the pipeline on the upstream of the second pneumatic valve 319 is pre-cooled, so that most of low-temperature pipelines can be effectively pre-cooled.

Similar to the coal oil circuit, a first cavitation venturi 321 and a second cavitation venturi 324 are connected behind the first pneumatic valve 318, and pressure sensors are respectively connected in front of the cavitation venturi for measuring the pressure in front of the cavitation venturi in real time so as to determine the flow rate of the cavitation venturi. Downstream of the first and second cavitation venturis 321 and 324, respectively, a sixth and seventh pneumatic valves 322 and 325 are connected, and during operation, three different flow rates can be supplied by opening the sixth pneumatic valve 322, closing the seventh pneumatic valve 325, opening the seventh pneumatic valve 325, closing the sixth pneumatic valve 322, and simultaneously opening the sixth and seventh pneumatic valves 322 and 325. Here, the present application relates not only to two pneumatic valves but also to three or more pneumatic valves, and can realize the adjustment of 7 different flow rates by controlling the on/off of the three pneumatic valves and can realize the adjustment of 15 different flow rates by controlling the on/off of the four pneumatic valves. A sixth pressure sensor 326 is installed downstream of the sixth pneumatic valve 322 and the seventh valve 325, and measures the pressure of the supplied liquid oxygen in real time.

The high pressure oxygen tank 328 is provided with a fourth safety valve 327 for ensuring the safety of the high pressure oxygen tank 328, and a ninth pressure gauge 329 for displaying the pressure of the high pressure oxygen tank 328 in real time is installed downstream thereof. The thirty-first-hand valve 330 can be used for temporarily adding or discharging oxygen, the thirty-first-hand valve 331 is used for stopping the connection or disconnection of the oxygen storage tank and a downstream pipeline, and the fourth filter 332 is used for filtering impurities in the oxygen. The second pressure reducer 334 is a pneumatic type pressure reducer, and since the oxygen flow rate is large here and the upstream pressure fluctuation is large, the pneumatic type pressure reducer is used here in order to obtain a stable high pressure oxygen supply pressure.

A seventh pressure sensor 335 is arranged at the downstream of the second pressure reducer 334 for measuring the pressure after the pressure reducer in real time, an eighth pneumatic valve 336 is used for controlling the on-off of the pipeline, the eighth pressure sensor 337 and the ninth pressure sensor 340 respectively measure the pressure before the first sonic nozzle 338 and the second sonic nozzle 341, and for the pressure before the sonic nozzle and the flow rate, the formula (2) is referred to:

wherein q is_mFor the mass flow of the gas flowing through, C_dIs the outflow coefficient of the sonic nozzle and is used for adjusting the difference between ideal gas and actual gas, A is the cross-sectional area of the throat part of the sonic nozzle, p₀Is the absolute stagnation pressure of the gas at the inlet of the sonic nozzle, R is the universal gas constant, T₀Is the absolute stagnation temperature of the gas at the inlet of the sonic nozzle, M is the molar mass of the gas, C_*Is a critical flow function.

Therefore, at a constant absolute stagnation temperature at the inlet of the sonic nozzle, the flow rate of the sonic nozzle will be related to the pre-sonic pressure only, and the pre-sonic pressure can be controlled by adjusting the pressure at the outlet of the first pressure reducer 117 and thus controlling the outlet pressure of the pneumatic second pressure reducer 334.

A ninth pneumatic valve 339 and a tenth pneumatic valve 342 are respectively connected behind the first sonic nozzle 338 and the second sonic nozzle 341, and the on-off of the two paths can be controlled by the pneumatic valves. Three different flow combinations can be achieved here by opening one of the pneumatic valves or both pneumatic valves simultaneously. A tenth pressure sensor 343 is installed downstream of the ninth and tenth air-operated valves 339 and 342 for measuring the pressure of the supplied high pressure oxygen in real time.

The liquid oxygen and oxygen double-path adjustable supply system has the gas oxygen and kerosene supply capacity and the liquid oxygen and kerosene supply capacity at the same time, can meet the requirements of an oxygen/kerosene power system which needs both liquid oxygen supply and gas oxygen supply, and can charge gas for an oxygen storage tank of the gas oxygen system by the liquid oxygen system, so that the coordinated sharing of propellant can be realized, and the maximum utilization of the propellant can be realized; on three supply system pipelines of gas oxygen, liquid oxygen and kerosene, a sound velocity nozzle or a cavitation venturi tube which are regulated by two paths (not only 2 paths, but also multiple paths) are respectively adopted, and a certain path, another path or two paths can be opened simultaneously in the use process, so that the supply flow of the propellant can be regulated within a certain range. The upstream pressure of the cavitation venturi and the upstream pressure of the sonic nozzle are respectively measured in front of the cavitation venturi and the sonic nozzle, and the closed-loop control of the pressures in front of the cavitation venturi and the sonic nozzle is realized through a selection circuit, a comparison circuit and a PID controller, so that the accurate and stable control of the pressures in front of the cavitation venturi and the sonic nozzle can be realized. Meanwhile, the back pressure of the cavitation venturi is monitored, so that the real-time display of the back pressure of the cavitation venturi and the back pressure of the sonic nozzle can be realized, and whether the downstream pressure requirement is met or not is prompted.

The embodiment of the invention also provides electronic equipment which comprises a memory, a processor and a computer program which is stored on the memory and can be operated on the processor, wherein the processor realizes the steps of the liquid oxygen and oxygen double-path adjustable supply method provided by the embodiment when executing the computer program.

The embodiment of the invention also provides a computer readable medium with a non-volatile program code executable by a processor, wherein the computer readable medium stores a computer program, and the computer program is executed by the processor to execute the steps of the liquid oxygen double-path adjustable supply method of the embodiment.

The computer program product provided in the embodiment of the present invention includes a computer-readable storage medium storing a program code, where instructions included in the program code may be used to execute the method described in the foregoing method embodiment, and specific implementation may refer to the method embodiment, which is not described herein again.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.