CN111998227A - Air supply system and air supply method for attitude and orbit control engine cold debugging - Google Patents
Air supply system and air supply method for attitude and orbit control engine cold debugging Download PDFInfo
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- CN111998227A CN111998227A CN202010845562.1A CN202010845562A CN111998227A CN 111998227 A CN111998227 A CN 111998227A CN 202010845562 A CN202010845562 A CN 202010845562A CN 111998227 A CN111998227 A CN 111998227A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/96—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof characterised by specially adapted arrangements for testing or measuring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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Abstract
The invention discloses an air supply system for a posture and orbit control engine during cold debugging, which is characterized in that: comprises an air source system, a high-pressure air bottle group and an air distribution console; the high-pressure air bottle group is used for storing compressed air, the air source system is connected with the five air supply branches through the busbar, the four branches can provide air sources for cold debugging of four engines simultaneously, and the other branch is used for supplementing the flow of the four output branches. The extra two branches are control air sources, one branch is used for providing a control air source for the pilot pressure reducing valve, and the other branch is used for controlling the pneumatic regulating valve and the pneumatic ball valve, so that accurate flow control is performed on the air supply branch, and the flow demand of the air supply branch is guaranteed. The invention not only can meet the cold test requirement of a single engine, but also realizes the requirement of simultaneously carrying out ground cold debugging work on four engines, greatly improves the test efficiency and reduces the test cost.
Description
Technical Field
The invention belongs to the field of engine ground tests, and particularly relates to an air supply system and an air supply method for a posture and orbit control engine during cold debugging.
Background
The solid attitude control engine system has the characteristics of few components, simple structure, low cost, easiness in production, use, long-term storage, convenience in maintenance and the like.
In the process of developing an attitude and orbit control engine, a large-flow air supply system mainly provides compressed air with certain flow and pressure for a ground cold test of the engine, and the compressed air is used as a power source to carry out various cold tests on the engine.
Aiming at a posture and orbit control engine with larger thrust, a plurality of air paths are connected in parallel and finally converged in one path for air supply, the operation process is complicated, the pressure build is unstable, the flow is difficult to stabilize, meanwhile, greater risks exist in safety, and a large-flow and high-pressure air supply system is urgent to stably, reliably and safely supply air for cold debugging of the engine.
Chinese patent document 201710341820.0, entitled "a remote control automatic air supply system", discloses an automatic air supply system applied to ground test of rocket engines, which realizes remote automatic control of the system on the premise of ensuring stable air supply of the system. The system mainly comprises a remote control gas supply system, a field control system and a gas distribution table system, and an instruction is transmitted to an electromagnetic valve, an electric ball valve and a pressure reducer on a gas supply pipeline of the gas distribution table system through the remote control system, so that the functions of remote control gas supply, remote control gas release, automatic switching, data state display, unattended operation and the like are guaranteed. The invention mainly solves the problem of danger of manual operation in the existing gas supply system, and aims to improve the safety and the working efficiency of field operators, so that the invention only relates to a remote control system, and the invention is explained aiming at the working mode, and does not explain the gas supply system and the gas inlet mode.
Chinese patent document "large flow adjustable compressed air source system" with application number 201610958102.3 discloses a compressed air source system capable of providing large flow adjustable compressed air, which comprises a plurality of compressor air supply pipelines, wherein each compressor air supply pipeline and the air supply main pipeline are provided with electric butterfly valves for adjusting the flow and pressure of the compressed air. The flow is adjusted by adopting a grouping control method, and the flow is adjusted by selecting configuration through a control system, so that the continuous and stable use requirement from minimum flow to maximum flow is met. The air intake mode of the air supply system is explained through a system process schematic diagram, although the requirement of large flow control is met, the working pressure is too low, the maximum exhaust pressure is 0.75MPa, the pressure is only suitable for the air source requirement in industrial production and the test requirement of low thrust in the engine ground test, and the test requirement of the engine with high thrust is far from being met.
Disclosure of Invention
Aiming at least one of the defects or improvement requirements in the prior art, the invention provides an air supply system and an air supply method for cold debugging of a posture and orbit control engine, which can meet the ground cold debugging requirements of a single engine or a plurality of engines under different pressure conditions and flow conditions. The air supply pressure of the air supply system is 28MPa, the air supply system is output in four ways, air supplies required by tests can be provided for four engines at the same time, the output exhaust pressure is 1MPa to 15MPa, the flow of single-way air supply is 2kg/s, the stability time of the output air pressure is 1 second, the pressure fluctuation is not more than 0.5MPa, the error range of the output pressure is 2.5 percent, and long-time continuous air supply can be realized. Pressure and flow information can be collected in real time in the working process, and the gas circuit control system is controlled in real time through the PLC control system to realize flow pressure control.
To achieve the above object, according to one aspect of the present invention, there is provided an air supply system for cold-state debugging of a posture and orbit control engine, comprising: comprises an air source system, a high-pressure air bottle group and an air distribution console;
high-pressure compressed air is stored in a high-pressure air bottle group through an air source system, and high-pressure large-flow compressed air is supplied to an engine for cold debugging through an air distribution console when a test is to be performed;
the high-pressure gas cylinder group comprises gas cylinder groups which are respectively arranged on a plurality of parallel gas storage branches and a bus bar which is connected with the tail ends of the parallel gas storage branches;
the gas distribution control console is centrally provided with a gas circuit control system and a PLC control system;
the gas path control system comprises at least seven branch pipelines output from the busbar, wherein the seven branch pipelines comprise at least five pressure reduction branches, at least one first control gas branch and at least one second control gas branch;
the at least five pressure reducing branches comprise at least four gas supply output branches which are connected in parallel and have the same structure and at least one flow supplementing branch;
each air supply output branch comprises a stop valve, a pilot pressure reducing valve, a pressure gauge, a ball valve, a flowmeter, a pneumatic regulating valve, a pressure transmitter, a pneumatic ball valve and an outlet connected to an engine, wherein the stop valve, the pilot pressure reducing valve, the pressure gauge, the ball valve, the flowmeter, the pneumatic regulating valve, the pressure transmitter and the pneumatic ball valve are sequentially connected in;
the flow supplementing branch comprises a stop valve, a pilot pressure reducing valve, a pressure gauge and a ball valve which are sequentially connected in series, and the rear end of the ball valve of the flow supplementing branch is connected between the ball valve and the flow meter on each air supply output branch through the stop valve;
the first control gas branch provides control gas for the work of a pneumatic regulating valve and a pneumatic ball valve on each gas supply output branch;
and the second control gas branch provides a pilot control gas source for the pilot reducing valves on each gas supply output branch and each flow supplementing branch.
Preferably, the first control gas branch comprises a stop valve, a pressure reducing valve, a pressure gauge and a stop valve which are sequentially connected in series; the rear end of the rear stop valve is respectively and independently connected to the pneumatic regulating valve and the pneumatic ball valve on each air supply output branch.
Preferably, the second control gas branch comprises a stop valve, a pressure reducing valve, a pressure gauge and a stop valve which are sequentially connected in series; the rear end of the rear stop valve is respectively and independently connected to the pilot reducing valves on each air supply output branch and the flow supplementing branch.
Preferably, the air source system comprises a high-pressure air compressor and a high-pressure heatless regeneration adsorption type filter dryer, and the high-pressure heatless regeneration adsorption type filter dryer is used for removing residual oil, moisture and solid particles in compressed air to obtain dry and clean gas.
Preferably, the high pressure air compressor discharge pressure is 35 MPa.
Preferably, the high-pressure gas cylinder group further comprises a stop valve; a stop valve is arranged in front of and behind the gas cylinder group on each parallel gas storage branch.
Preferably, the high-pressure gas cylinder group further comprises a filter; and the gas cylinder group on each parallel gas storage branch is connected with the bus bar through a filter.
Preferably, the filter has a filtration accuracy of 40 μm.
Preferably, an outlet of the pilot pressure reducing valve of each of the supply gas output branch and the flow supplementing branch is provided with a safety valve.
In order to achieve the above object, according to another aspect of the present invention, there is provided a method for supplying air to an air supply system for cold-state debugging of a posture and orbit control engine, comprising the steps of:
s1, the gas source system fills compressed gas into the gas bottle group in the high-pressure gas bottle group for standby;
s2, when the attitude and orbit control engine is in cold debugging, the stop valves at the outlet ends of the gas cylinder groups on all the parallel gas storage branches are opened at the same time, and the stop valve at the gas inlet end of each pressure reduction branch behind the busbar is opened at the same time;
the air supply steps of each air supply output branch are as follows:
s3, filtering the high-pressure compressed air to reach a pilot reducing valve behind a stop valve at an air inlet end, opening the stop valve at the air inlet end of the reducing valve of the second control air branch, adjusting to a preset output pressure, and opening the stop valve at an air outlet end;
s4, opening a stop valve at the air inlet end of the first control air branch after the busbar is opened, allowing high-pressure compressed air to enter the first control air branch to reach a pressure reducing valve, adjusting the pressure reducing valve, observing a subsequent pressure gauge to ensure that pressure display reaches a set value, and opening the stop valve at the air outlet end behind the pressure gauge;
s5, adjusting the output pressure of a pilot reducing valve of the air supply output branch, observing that the pressure display value of the outlet of a pressure gauge behind the pilot reducing valve reaches the test pressure, and opening a ball valve behind the pressure gauge and a stop valve at the air inlet end of a flow supplementing branch behind the busbar;
and S6, opening a pneumatic ball valve of the air supply output branch through the first control air branch according to the test flow, measuring the flow through a flow meter on the air supply output branch according to the flow required by the test flow, comparing the measured flow with a set flow value, controlling a pneumatic regulating valve to regulate the flow, and supplying air to the engine through an outlet of the air supply output branch by the PLC control system.
The above-described preferred features may be combined with each other as long as they do not conflict with each other.
Generally, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:
1. the air supply system and the air supply method for the attitude and orbit control engine during cold debugging can meet the ground cold debugging requirements of a single engine or a plurality of engines under different pressure conditions and flow conditions. The air supply pressure of the air supply system is 28MPa, the air supply system is output in four ways, air supplies required by tests can be provided for four engines at the same time, the output exhaust pressure is 1MPa to 15MPa, the flow of single-way air supply is 2kg/s, the stability time of the output air pressure is 1 second, the pressure fluctuation is not more than 0.5MPa, the error range of the output pressure is 2.5 percent, and long-time continuous air supply can be realized. Pressure and flow information can be collected in real time in the working process, and the gas circuit control system is controlled in real time through the PLC control system to realize flow pressure control.
2. The air supply system and the air supply method for the attitude and orbit control engine during cold debugging adopt the high-pressure air bottle group to store compressed air, connect the air source system with five air supply branches through the busbar, the four branches can simultaneously provide air sources for cold debugging of four engines, and the other branch is used as flow supplement of the four output branches. The extra two branches are control air sources, one branch is used for providing a control air source for the pilot pressure reducing valve, and the other branch is used for controlling the pneumatic regulating valve and the pneumatic ball valve, so that accurate flow control is performed on the air supply branch, and the flow demand of the air supply branch is guaranteed. The invention not only can meet the cold test requirement of a single engine, but also realizes the requirement of simultaneously carrying out ground cold debugging work on four engines, greatly improves the test efficiency and reduces the test cost.
3. According to the air supply system and the air supply method for the attitude and orbit control engine during cold debugging, the pneumatic regulating valves and the pneumatic ball valves are arranged on the four output branches, and the PLC control system is adopted to realize accurate control, remote control and automatic control on output flow, so that the safety and convenience of operation are greatly improved.
4. According to the air supply system and the air supply method for the attitude and orbit control engine during cold debugging, each pipeline is made of high-pressure stainless steel pipes, and aerospace standard 37-degree pipeline connecting pieces are adopted between the components and the pipelines, so that the follow-up installation, disassembly and maintenance are facilitated.
Drawings
Fig. 1 is a schematic diagram of an air supply system and an air supply method for a posture and orbit control engine in a cold state debugging process according to an embodiment of the invention.
In the figure: 1-high-pressure air compressor, 2-first stop valve, 3-first gas cylinder group, 4-second stop valve, 5-first filter, 6-third stop valve, 7-second gas cylinder group, 8-fourth stop valve, 9-second filter, 10-fifth stop valve, 11-third gas cylinder group, 12-sixth stop valve, 13-third filter, 14-seventh stop valve, 15-fourth gas cylinder group, 16-eighth stop valve, 17-fourth filter, 18-confluence bar, 19-branch line I, 20-ninth stop valve, 21-first pressure reducing valve, 22-first pressure gauge, 23-tenth stop valve, 24-branch line II, 25-eleventh stop valve, 26-first pilot pressure reducing valve, 27-a second pressure gauge, 28-a first safety valve, 29-a first ball valve, 30-a first flowmeter, 31-a first pneumatic regulating valve, 32-a first pressure transmitter, 33-a first pneumatic ball valve, 34-a first outlet, 35-a branch of three, 36-a twelfth stop valve, 37-a second pilot pressure reducing valve, 38-a third pressure gauge, 39-a second safety valve, 40-a second ball valve, 41-a thirteenth stop valve, 42-a second flowmeter, 43-a second pneumatic regulating valve, 44-a second pressure transmitter, 45-a second pneumatic ball valve, 46-a second outlet, 47-a branch of four, 48-a fourteenth stop valve, 49-a third pilot pressure reducing valve, 50-a fourth pressure gauge, 51-a third safety valve, 52-third ball valve, 53-fifteenth stop valve, 54-branch five, 55-sixteenth stop valve, 56-fourth pilot pressure reducing valve, 57-fifth pressure gauge, 58-fourth safety valve, 59-fourth ball valve, 60-seventeenth stop valve, 61-third flow meter, 62-third pneumatic regulating valve, 63-third pressure transmitter, 64-third pneumatic ball valve, 65-third outlet, 66-branch six, 67-eighteenth stop valve, 68-fifth pilot pressure reducing valve, 69-sixth pressure gauge, 70-fifth safety valve, 71-fifth ball valve, 72-nineteenth stop valve, 73-fourth flow meter, 74-fourth pneumatic regulating valve, 75-fourth pressure transmitter, 76-fourth pneumatic ball valve, 77-fourth outlet, 78-branch seven, 79-twentieth stop valve, 80-second reducing valve, 81-twenty-first stop valve and 82-seventh pressure gauge.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other. The present invention will be described in further detail with reference to specific embodiments.
As a preferred embodiment of the present invention, as shown in fig. 1, the present invention provides an air supply system for cold debugging of an attitude and orbit control engine, which includes an air supply system, a high pressure air bottle set, and an air distribution console; high-pressure compressed air is stored in the high-pressure air bottle group through the air source system, and when the test is to be carried out, high-pressure large-flow compressed air is supplied to the engine through the air distribution console for cold debugging.
The air source system comprises a high-pressure air compressor 1 and a high-pressure heatless regeneration adsorption type filtering dryer, wherein the exhaust pressure of the high-pressure air compressor 1 is 35MPa, and the high-pressure heatless regeneration adsorption type filtering dryer is used for removing residual oil, moisture and solid particles in compressed air to obtain dry and clean gas.
The high-pressure gas cylinder group comprises gas cylinder groups which are respectively arranged on a plurality of parallel gas storage branches and a bus bar 18 which is connected with the tail ends of the parallel gas storage branches together; the gas cylinder group comprises four groups of 25 gas cylinders, the specification of the gas cylinder is 50L and 35MPa, and the volume of the gas cylinder group is 5m3. The gas cylinder group adopts a parallel connection mode, and the inflation inlet and the gas supply inlet of each group of gas cylinders are provided with stop valves. The bus bar 18 concentrates and gathers the gas at the gas outlets of the four gas cylinder groups to the main pipeline, so that the high-pressure gas is conveniently and intensively managed. The high-pressure gas cylinder group also comprises a filter; the gas cylinder group on each parallel gas storage branch is connected with the bus bar 18 through a filter, and the filtering precision is 40 mu m.
The gas distribution control console is centrally provided with a gas circuit control system and a PLC control system; the gas circuit control system comprises a filter, a stop valve, a pressure reducing valve, a manual ball valve, a pneumatic regulating valve, a safety valve, a pressure gauge, a pressure sensor, a flowmeter, a pipeline system and the like; the PLC control system comprises a PLC controller, a touch screen and control software, realizes local remote control and is used as a lower computer of the control system.
The gas circuit control system comprises at least seven branch pipelines (only seven branches are illustrated in fig. 1) output from the bus bar 18, wherein the at least seven branch pipelines comprise at least five pressure reducing branches (only five branches are illustrated in fig. 1), at least one first control gas branch (only one branch is illustrated in fig. 1) and at least one second control gas branch (only one branch is illustrated in fig. 1).
The at least five pressure reducing branches comprise at least four gas supply output branches (only four branches are shown in the figure 1 in an example) which are connected in parallel and have the same structure, are used for providing gas sources for engine tests, and can simultaneously meet the cold debugging requirements of at least four engines; and at least one traffic-supplementing branch (only one is illustrated in fig. 1).
Every air feed output branch road is including the export that is connected to the stop valve, guide's relief pressure valve, manometer, ball valve, flowmeter, pneumatic governing valve, pressure transmitter, pneumatic ball valve and is connected to the engine that establish ties around in proper order.
The flow compensation branch guarantees that pilot pressure reducing valve output flow meets the required flow demand of the test, specifically includes stop valve, pilot pressure reducing valve, manometer, the ball valve that series connection set up around in proper order, the rear end of the ball valve of flow compensation branch inserts every through the stop valve respectively between the ball valve on the air feed output branch and the flowmeter.
And the outlets of the pilot reducing valves of each gas supply output branch and each flow supplementing branch are provided with safety valves. When the outlet pressure of the pilot reducing valve exceeds the setting pressure of the safety valve, the safety valve is opened, and the pressure of the pipeline is guaranteed to be maintained at a specified value.
The first control gas branch provides control gas for the work of a pneumatic regulating valve and a pneumatic ball valve on each gas supply output branch, and the purpose is to realize a remote control function. The first control gas branch comprises a stop valve, a pressure reducing valve, a pressure gauge and a stop valve which are sequentially connected in series from front to back; the rear end of the rear stop valve is respectively and independently connected to the pneumatic regulating valve and the pneumatic ball valve on each air supply output branch.
The second control gas branch provides a pilot control gas source for the pilot reducing valves on the gas supply output branch and the flow supplementing branch, and aims to realize a remote control function. The second control gas branch comprises a stop valve, a pressure reducing valve, a pressure gauge and a stop valve which are sequentially connected in series from front to back; the rear end of the rear stop valve is respectively and independently connected to the pilot reducing valves on each air supply output branch and the flow supplementing branch.
Further, by testing the working medium, inlet pressure, outlet pressure and flow requirement in the process, calculating the flow coefficient Cv value required by the pilot reducing valve, considering certain redundancy, and combining the output flow coefficient value of the optional reducing valve, the flow coefficient Cv of the reducing valve is 12.
Further, the flow coefficient Cv required during testing under the condition of lower testing pressure is larger, so that four pressure reducing branches are arranged to be used as flow supplement for achieving proper redundancy, and the flow coefficient Cv of four output branches can reach 15.
Further, the pipe diameter of an inlet and an outlet of the pressure reducing valve is about phi 32 mm. The outlet of the pressure reducing branch is not smaller than the diameter of the outlet of the pressure reducing valve, and the test air supply pipeline is DN40 and the front pipeline of the pressure reducing valve is DN32 in consideration of adding supplementary flow into each branch.
The composition of each pipeline of the air supply system for cold debugging of the attitude and orbit control engine is described in detail below with reference to fig. 1:
in the four parallel gas storage branches, the first gas storage branch comprises a first stop valve 2, a first gas cylinder group 3, a second stop valve 4 and a first filter 4 which are sequentially connected in series from front to back; the second gas storage branch comprises a third stop valve 6, a second gas cylinder group 7, a fourth stop valve 8 and a second filter 9 which are sequentially connected in series from front to back; the third gas storage branch comprises a fifth stop valve 10, a third gas cylinder group 11, a sixth stop valve 12 and a third filter 13 which are sequentially connected in series from front to back; the fourth gas storage branch comprises a seventh stop valve 14, a fourth gas cylinder group 15, an eighth stop valve 16 and a fourth filter 17 which are sequentially connected in series.
The seven branch pipelines comprise a first control gas branch, namely a branch I19, five pressure reducing branches, namely a branch II 24 to a branch II 66, and a second control gas branch, namely a branch seven 78. The five pressure reducing branches comprise four air supply output branches, namely a branch II, a branch III, a branch V and a branch VI, and a flow supplementing branch, namely a branch IV 47.
The first branch 19 comprises a ninth cut-off valve 20, a first reducing valve 21, a first pressure gauge 22 and a tenth cut-off valve 23 which are sequentially arranged in series. The outlet end of the tenth cut-off valve 23 is connected to the first pneumatic regulating valve 31, the second pneumatic regulating valve 43, the third pneumatic regulating valve 62, and the fourth pneumatic regulating valve 74, respectively, and is connected to the first pneumatic ball valve 33, the second pneumatic ball valve 45, the third pneumatic ball valve 64, and the fourth pneumatic ball valve 76, respectively.
The second branch 24 comprises an eleventh stop valve 25, a first pilot reducing valve 26, a second pressure gauge 27, a first safety valve 28, a first ball valve 29, a first flow meter 30, a first pneumatic regulating valve 31, a first pressure transmitter 32, a first pneumatic ball valve 33 and a first outlet 34 which are sequentially arranged in series.
The third branch 35 comprises a twelfth stop valve 36, a second pilot reducing valve 37, a third pressure gauge 38, a second safety valve 39, a second ball valve 40, a second flow meter 42, a second pneumatic regulating valve 43, a second pressure transmitter 44, a second pneumatic ball valve 45 and a second outlet 46 which are sequentially arranged in series.
The fourth branch 47 comprises a fourteenth stop valve 48, a third pilot reducing valve 49, a fourth pressure gauge 50, a third safety valve 51 and a third ball valve 52 which are sequentially arranged in series, and the thirteenth stop valve 41, the fifteenth stop valve 53, the seventeenth stop valve 60 and the nineteenth stop valve 72 are connected to the air outlet end of the fifth ball valve 71 of the sixth branch 66, respectively, and are connected to the air outlet end of the first ball valve 29 of the second branch 24, the fifteenth stop valve 53 and the seventeenth stop valve 40 in parallel.
The branch circuit five 54 comprises a sixteenth stop valve 55, a fourth pilot reducing valve 56, a fifth pressure gauge 57, a fourth safety valve 58, a fourth ball valve 59, a third flow meter 61, a third pneumatic regulating valve 62, a third pressure transmitter 63, a third pneumatic ball valve 64 and a third outlet 65 which are sequentially arranged in series.
The branch line six 66 comprises an eighteenth stop valve 67, a fifth pilot reducing valve 68, a sixth pressure gauge 69, a fifth safety valve 70, a fifth ball valve 71, a fourth flow meter 73, a fourth pneumatic regulating valve 74, a fourth pressure transmitter 75, a fourth pneumatic ball valve 76 and a fourth outlet 77 which are sequentially arranged in series.
The branch line seven 78 comprises a twentieth stop valve 79, a second reducing valve 80, a twenty-first stop valve 81 and a seventh pressure gauge 82 which are sequentially arranged in series. The outlet end of the twenty-first cutoff valve 81 is connected to the first pilot reducing valve 26, the second pilot reducing valve 37, the third pilot reducing valve 49, the fourth pilot reducing valve 56, and the fifth pilot reducing valve 68, respectively.
The following describes in detail an air supply method of an air supply system for cold debugging of an attitude and orbit control engine, with reference to fig. 1, including the following steps:
and S1, the gas source system fills compressed gas into the gas bottle groups in the high-pressure gas bottle groups for later use.
Specifically, the first stop valve 2, the third stop valve 6, the fifth stop valve 10 and the seventh stop valve 14 are opened, the high-pressure air compressor 1 is started to generate high-pressure compressed air, and the compressed air is subjected to drying and purifying treatment by a high-pressure heatless regeneration adsorption type filtering dryer and then is filled into the first air bottle group 3, the second air bottle group 7, the third air bottle group 11 and the fourth air bottle group 15 for standby.
S2, when the attitude and orbit control engine is in cold debugging, in order to maintain flow supply required by testing, the stop valves at the outlet ends of the gas cylinder groups on the four parallel gas storage branch circuits, namely the second stop valve 4, the fourth stop valve 8, the sixth stop valve 12 and the eighth stop valve 16, need to be opened at the same time, and are respectively filtered by the first filter 5, the second filter 9, the third filter 13 and the fourth filter 17 and are gathered to the busbar 18 together; and the stop valves of the inlet ends of the five pressure reducing branches, namely the branch two 24, the branch three 35, the branch four 47, the branch five 54 and the branch six 66 after the bus bar 18 is opened simultaneously correspond to the eleventh stop valve 25, the twelfth stop valve 36, the fourteenth stop valve 48, the sixteenth stop valve 55 and the eighteenth stop valve 67 respectively.
The air supply steps of each air supply output branch are as follows:
and S3, filtering the high-pressure compressed air to reach a pilot reducing valve behind a stop valve at the air inlet end, opening the stop valve at the air inlet end of the reducing valve of the second control air branch, adjusting to a preset output pressure, and opening the stop valve at the air outlet end.
S4, opening a stop valve at the air inlet end of the first control air branch after the bus bar 18, allowing high-pressure compressed air to enter the first control air branch to reach a pressure reducing valve, adjusting the pressure reducing valve, observing a subsequent pressure gauge to ensure that the pressure display reaches a set value, and opening the stop valve at the air outlet end after the pressure gauge.
And S5, adjusting the output pressure of the pilot reducing valve of the air supply output branch, observing that the pressure gauge outlet pressure display value reaches the test pressure, and opening the ball valve behind the pressure gauge and the stop valve at the air inlet end of the flow supplementing branch behind the bus 18.
And S6, opening a pneumatic ball valve of the air supply output branch through the first control air branch according to the test flow, measuring the flow through a flow meter on the air supply output branch according to the flow required by the test flow, comparing the measured flow with a set flow value, controlling a pneumatic regulating valve to regulate the flow, and supplying air to the engine through an outlet of the air supply output branch by the PLC control system.
Specifically, the detailed description is only given with reference to the second branch 24 of the air supply output branch, and the air supply steps are as follows:
s3, the first pilot reducing valve 26 is arranged behind the eleventh stop valve 25 at the air inlet end after the high-pressure compressed air is filtered, the twentieth stop valve 79 at the air inlet end of the second reducing valve 80 of the second control air branch, namely the branch seven 78 is opened, the output pressure is adjusted to be 0.5MPa, and the twenty-first stop valve 81 at the air outlet end is opened.
S4, opening the ninth stop valve 20 at the air inlet end of the first control air branch, namely the first branch 19, after the bus bar 18 is opened, allowing high-pressure compressed air to enter the first control air branch, namely the first branch 19, to reach the first pressure reducing valve 21, adjusting the first pressure reducing valve 21, observing the first pressure gauge 22 behind the first pressure gauge to ensure that the pressure display reaches the set value, and opening the tenth stop valve 23 at the air outlet end behind the first pressure gauge 22.
And S5, adjusting the output pressure of the first pilot reducing valve 26 of the second branch 24, observing that the subsequent outlet pressure display value of the second pressure gauge 27 reaches the required test pressure, and opening the first ball valve 29 after the second pressure gauge 27 and the thirteenth stop valve 41 at the air inlet end of the flow supplementing branch, namely the fourth branch 47, after the bus 18.
S6, setting process parameters of the cold trial run measurement and control system are realized through a PLC control system; the PLC control system opens a first pneumatic ball valve 33 of a second branch 24 through a first control gas branch, namely a first branch 19 according to a test flow, measures the flow through a first flow meter 30 on the second branch 24 according to the flow required by the test flow, compares the measured flow with a set flow value, controls a first pneumatic regulating valve 31 to regulate the flow, and supplies gas to the engine through a first outlet 34 of the second branch 24.
The air supply steps of the other air supply output branches are the same as the principle of the second branch 24, and are not described again.
In summary, compared with the prior art, the scheme of the invention has the following significant advantages:
1. the air supply system and the air supply method for the attitude and orbit control engine during cold debugging can meet the ground cold debugging requirements of a single engine or a plurality of engines under different pressure conditions and flow conditions. The air supply pressure of the air supply system is 28MPa, the air supply system is output in four ways, air supplies required by tests can be provided for four engines at the same time, the output exhaust pressure is 1MPa to 15MPa, the flow of single-way air supply is 2kg/s, the stability time of the output air pressure is 1 second, the pressure fluctuation is not more than 0.5MPa, the error range of the output pressure is 2.5 percent, and long-time continuous air supply can be realized. Pressure and flow information can be collected in real time in the working process, and the gas circuit control system is controlled in real time through the PLC control system to realize flow pressure control.
2. The air supply system and the air supply method for the attitude and orbit control engine during cold debugging adopt the high-pressure air bottle group to store compressed air, connect the air source system with five air supply branches through the busbar, the four branches can simultaneously provide air sources for cold debugging of four engines, and the other branch is used as flow supplement of the four output branches. The extra two branches are control air sources, one branch is used for providing a control air source for the pilot pressure reducing valve, and the other branch is used for controlling the pneumatic regulating valve and the pneumatic ball valve, so that accurate flow control is performed on the air supply branch, and the flow demand of the air supply branch is guaranteed. The invention not only can meet the cold test requirement of a single engine, but also realizes the requirement of simultaneously carrying out ground cold debugging work on four engines, greatly improves the test efficiency and reduces the test cost.
3. According to the air supply system and the air supply method for the attitude and orbit control engine during cold debugging, the pneumatic regulating valves and the pneumatic ball valves are arranged on the four output branches, and the PLC control system is adopted to realize accurate control, remote control and automatic control on output flow, so that the safety and convenience of operation are greatly improved.
4. According to the air supply system and the air supply method for the attitude and orbit control engine during cold debugging, each pipeline is made of high-pressure stainless steel pipes, and aerospace standard 37-degree pipeline connecting pieces are adopted between the components and the pipelines, so that the follow-up installation, disassembly and maintenance are facilitated.
It will be appreciated that the embodiments of the system described above are merely illustrative, in that elements illustrated as separate components may or may not be physically separate, may be located in one place, or may be distributed over different network elements. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of the embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
In addition, it should be understood by those skilled in the art that in the specification of the embodiments of the present invention, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the description of the embodiments of the invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description. Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the embodiments of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects.
However, the disclosed method should not be interpreted as reflecting an intention that: that is, the claimed embodiments of the invention require more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of an embodiment of this invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and not to limit the same; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An air supply system for cold debugging of an attitude and orbit control engine is characterized in that: comprises an air source system, a high-pressure air bottle group and an air distribution console;
high-pressure compressed air is stored in a high-pressure air bottle group through an air source system, and high-pressure large-flow compressed air is supplied to an engine for cold debugging through an air distribution console when a test is to be performed;
the high-pressure gas cylinder group comprises gas cylinder groups which are respectively arranged on a plurality of parallel gas storage branches and a bus bar which is connected with the tail ends of the parallel gas storage branches;
the gas distribution control console is centrally provided with a gas circuit control system and a PLC control system;
the gas path control system comprises at least seven branch pipelines output from the busbar, wherein the seven branch pipelines comprise at least five pressure reduction branches, at least one first control gas branch and at least one second control gas branch;
the at least five pressure reducing branches comprise at least four gas supply output branches which are connected in parallel and have the same structure and at least one flow supplementing branch;
each air supply output branch comprises a stop valve, a pilot pressure reducing valve, a pressure gauge, a ball valve, a flowmeter, a pneumatic regulating valve, a pressure transmitter, a pneumatic ball valve and an outlet connected to an engine, wherein the stop valve, the pilot pressure reducing valve, the pressure gauge, the ball valve, the flowmeter, the pneumatic regulating valve, the pressure transmitter and the pneumatic ball valve are sequentially connected in;
the flow supplementing branch comprises a stop valve, a pilot pressure reducing valve, a pressure gauge and a ball valve which are sequentially connected in series, and the rear end of the ball valve of the flow supplementing branch is connected between the ball valve and the flow meter on each air supply output branch through the stop valve;
the first control gas branch provides control gas for the work of a pneumatic regulating valve and a pneumatic ball valve on each gas supply output branch;
and the second control gas branch provides a pilot control gas source for the pilot reducing valves on each gas supply output branch and each flow supplementing branch.
2. The air supply system for cold commissioning of a posture and orbit controlled engine of claim 1, wherein:
the first control gas branch comprises a stop valve, a pressure reducing valve, a pressure gauge and a stop valve which are sequentially connected in series from front to back; the rear end of the rear stop valve is respectively and independently connected to the pneumatic regulating valve and the pneumatic ball valve on each air supply output branch.
3. The air supply system for cold commissioning of a posture and orbit controlled engine of claim 2, wherein:
the second control gas branch comprises a stop valve, a pressure reducing valve, a pressure gauge and a stop valve which are sequentially connected in series from front to back; the rear end of the rear stop valve is respectively and independently connected to the pilot reducing valves on each air supply output branch and the flow supplementing branch.
4. The air supply system for cold commissioning of a posture and orbit controlled engine of claim 3, wherein:
the air source system comprises a high-pressure air compressor and a high-pressure heatless regeneration adsorption type filtering dryer, wherein the high-pressure heatless regeneration adsorption type filtering dryer is used for removing residual oil, moisture and solid particles in compressed air to obtain dry and clean air.
5. The air supply system for cold commissioning of a posture and orbit controlled engine of claim 4, wherein:
the exhaust pressure of the high-pressure air compressor is 35 MPa.
6. The air supply system for cold commissioning of a posture and orbit controlled engine of claim 3, wherein:
the high-pressure gas cylinder group also comprises a stop valve; a stop valve is arranged in front of and behind the gas cylinder group on each parallel gas storage branch.
7. The air supply system for cold commissioning of a posture and orbit controlled engine of claim 6, wherein:
the high-pressure gas cylinder group also comprises a filter; and the gas cylinder group on each parallel gas storage branch is connected with the bus bar through a filter.
8. The air supply system for cold commissioning of a posture and orbit controlled engine of claim 7, wherein:
the filtration accuracy of the filter was 40 μm.
9. The air supply system for cold commissioning of a posture and orbit controlled engine of claim 3, wherein:
and the outlets of the pilot reducing valves of each gas supply output branch and each flow supplementing branch are provided with safety valves.
10. A method of supplying air to an air supply system for a cold commissioning of a posture and orbit controlled engine as defined in any one of claims 3 to 9, comprising the steps of:
s1, the gas source system fills compressed gas into the gas bottle group in the high-pressure gas bottle group for standby;
s2, when the attitude and orbit control engine is in cold debugging, the stop valves at the outlet ends of the gas cylinder groups on all the parallel gas storage branches are opened at the same time, and the stop valve at the gas inlet end of each pressure reduction branch behind the busbar is opened at the same time;
the air supply steps of each air supply output branch are as follows:
s3, filtering the high-pressure compressed air to reach a pilot reducing valve behind a stop valve at an air inlet end, opening the stop valve at the air inlet end of the reducing valve of the second control air branch, adjusting to a preset output pressure, and opening the stop valve at an air outlet end;
s4, opening a stop valve at the air inlet end of the first control air branch after the busbar is opened, allowing high-pressure compressed air to enter the first control air branch to reach a pressure reducing valve, adjusting the pressure reducing valve, observing a subsequent pressure gauge to ensure that pressure display reaches a set value, and opening the stop valve at the air outlet end behind the pressure gauge;
s5, adjusting the output pressure of a pilot reducing valve of the air supply output branch, observing that the pressure display value of the outlet of a pressure gauge behind the pilot reducing valve reaches the test pressure, and opening a ball valve behind the pressure gauge and a stop valve at the air inlet end of a flow supplementing branch behind the busbar;
and S6, opening a pneumatic ball valve of the air supply output branch through the first control air branch according to the test flow, measuring the flow through a flow meter on the air supply output branch according to the flow required by the test flow, comparing the measured flow with a set flow value, controlling a pneumatic regulating valve to regulate the flow, and supplying air to the engine through an outlet of the air supply output branch by the PLC control system.
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| CN111998227B (en) | 2022-04-29 |
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