CN203224792U - Inlet pressure closed loop adjusting system for testing engine - Google Patents
Inlet pressure closed loop adjusting system for testing engine Download PDFInfo
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- CN203224792U CN203224792U CN 201320154516 CN201320154516U CN203224792U CN 203224792 U CN203224792 U CN 203224792U CN 201320154516 CN201320154516 CN 201320154516 CN 201320154516 U CN201320154516 U CN 201320154516U CN 203224792 U CN203224792 U CN 203224792U
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Abstract
The utility model relates to an inlet pressure closed loop adjusting system for testing an engine. The system comprises a fuel supercharging system, an oxidizing agent supercharging system, a fuel container, an oxidizing agent container, a pressure measurement device, and a closed loop control device, wherein the containers are both connected with the engine; an output terminal of the fuel supercharging system is connected with the fuel container; an output terminal of the oxidizing agent supercharging system is connected with the oxidizing agent container; the pressure measurement device comprises an acquisition device and a data processor; the acquisition device acquires the pressures of inlets of the engine and the container pressures of the containers of the engine, and transmits the acquired pressures to the data processor; an output terminal of the data processor is connected with an input terminal of the closed loop control device; and an output terminal of the closed loop control device is connected with the supercharging systems. According to the utility model, the technical problems of low precision and large time lag of conventional engine pump inlet pressure control modes are solved. The inlet pressure closed loop adjusting system of the utility model controls the engine pump inlet pressures by adjusting the pressures of the containers and is advantaged by being rapid, continuous, and reliable.
Description
Technical field
The utility model relates to a kind of engine test inlet pressure closed-loop regulating system.
Background technology
During engine test, the engine inlet pressure need change according to the curve of setting, and control is within certain bandwidth range.If inlet pressure is lower than lower band, then cause pump cavitation easily; If inlet pressure is higher than the bandwidth upper limit, engine will be under the high work condition state will work.Both of these case all will have a negative impact to the operate as normal of engine, even cause the test run failure.If inlet pressure fluctuation is excessive key parameters such as the rotating speed of engine, constant pressure, thrust, flow are all exerted an influence, very be unfavorable for the correct performance of engine evaluated objectively.
At present, the engine pump inlet pressure is open loop control mode, mainly presses to regulate inlet pressure by control box.Because inlet pressure and case are pressed with certain corresponding relation, at first configure N2 source decompressor output pressure, calculate outlet according to the inlet pressure setting curve then and press setting curve and bandwidth, press the ON/OFF of controlling main supercharging valve with the comparison of setting value according to the actual measurement case at last, therefore, compacting has showed simple switching regulator closed-loop control to case.Such control mode causes supercharging deviation band big; the time lag phenomenon is serious; the pressure charging valve goalkeeper carries out supercharging by preset program to container in the process of the test; can't change compensating reducer pressure fluctuates or the engine fluctuations in discharge causes inlet pressure in commissioning process, case usually can take place press and meet the requirements but inlet pressure continues the phenomenon that descends.For the boosting capability deficiency that prevents that disturbing factors such as reducer pressure reduces in the process of the test, the engine flow becomes greatly, system's flow resistance increase from causing, the normal supercharging orifice plate ability that adjustment is calculated is bigger than normal, but therefore cause engine to be under the higher operating mode in process of the test works, is unfavorable for the operate as normal of engine always.The setting deviation fluctuation range of engine pump inlet pressure is ± 0.025MPa in the engines ground process of the test at present, and deviation (SV-PV) fluctuation range of engine pump inlet pressure is [0.04,0.02] in the actual process of the test, and precision is low, and time lag is big.
The utility model content
In order to solve the technical matters that existing engine pump inlet pressure control mode precision is low, time lag is big, the utility model provides a kind of engine test inlet pressure closed-loop regulating system.
Technical solution of the present utility model:
Engine test inlet pressure closed-loop regulating system, its special character is: comprise fuel pressure boost system, oxidizer pressurizing system, fuel container case, oxidant vessel case, device for pressure measurement and closed-loop control device;
Described fuel container case is connected with engine, and described oxidant vessel case is connected with engine, and the output terminal of described fuel pressure boost system is connected with the fuel container case, and the output terminal of described oxidizer pressurizing system is connected with the oxidant vessel case;
Described device for pressure measurement comprises interconnective harvester and data processor, described harvester is gathered the oxidant stress of engine entrance, the fuel pressure of engine entrance, the case of oxidant vessel case is pressed and the case of fuel container case is pressed, described harvester is with the oxidant stress of the engine entrance that collects, the fuel pressure of engine entrance, the case of oxidant vessel case is pressed and the case Hair Fixer of fuel container case is given data processor, the output terminal of described data processor is connected with the input end of closed-loop control device, the output terminal of described closed-loop control device is connected with the fuel pressure boost system with oxidizer pressurizing system, the control aperture.
Above-mentioned oxidizer pressurizing system comprise orifice plate matrix that a plurality of oxidant orifices are formed and with oxidant orifice a plurality of oxygenant solenoid valves one to one, described oxidant orifice one end is connected with source nitrogen, the other end is connected with the oxidant vessel case by the oxygenant solenoid valve, and the control end of a plurality of oxygenant solenoid valves is connected with the output terminal of closed-loop control device respectively;
Described fuel pressure boost system comprise orifice plate matrix that a plurality of fuel orifice plates are formed and with a plurality of fuel orifice plates a plurality of fuel solenoid valves one to one, described fuel orifice plate one end is connected with source nitrogen, the other end is connected with the fuel container case by the fuel solenoid valve, and the control end of a plurality of fuel solenoid valves is connected with the output terminal of closed-loop control device respectively.
Above-mentioned closed-loop control device comprises control center, industrial computer, timer module, photoelectricity isolation load module and relay output module;
Described industrial computer is used to control center, timer module, photoelectricity to isolate load module and relay output module provides operation platform;
Described photoelectricity isolate load module be used for realizing to engine drive, the collection of emergency mobile forces stop signal, and timer module picked up counting or stop the triggering of timing by control center;
Described timer module is used for carrying out timing, the output timing signal after triggering obtaining picking up counting; Or after obtaining stopping the timing triggering, stop timing;
Described control center comprises data receiving element, control module and display unit, and described data receiving element is used for receiving in real time the measurement data that data processor sends, and measurement data is exported to display unit; Described control module goes periodically to obtain measurement data from the data receiving element according to the clock signal of timer module output, judge simultaneously, control and record, thereby the output control signal is given relay output module and display unit; Described display unit is used for measurement data and control signal are shown;
Described relay output module is used for the control signal according to the control module output of control center, and fuel solenoid valve and oxygenant solenoid valve are exported control.
Above-mentioned oxidant orifice is 5, and their area is than being 16:8:4:2:1.
Above-mentioned fuel orifice plate is 4, and their area is than being 8:4:2:1.
The advantage that the utility model has:
1, the utility model is controlled the engine pump inlet pressure by adjusting tank pressure, rapidly, continuously, reliably, can adapt to the requirement of engine test pressure charging system.
Though it is more that 2, the utility model adopts mode pipeline and the equipment of orifice plate matrix, system complex, each supercharging orifice plate is independently controlled, and control accuracy depends on minimum supercharging orifice plate, does not have the control dead band; Response speed depends on the response speed of single solenoid valve; Each supercharging orifice plate is separate, scattered risks.
Description of drawings
Fig. 1 is the schematic diagram of engine test inlet pressure closed-loop regulating system; P
S1Be oxygenant N
2Source decompressor top hole pressure P
S2Be fuel N
2Source decompressor top hole pressure
Fig. 2 is the topology view of closed-loop control device;
Fig. 3 is the course of work synoptic diagram of closed-loop control device;
Fig. 4 is data setting value curve synoptic diagram.
Embodiment
Realize that engine pump inlet pressure closed loop adjustment need solve following problem: engine pump inlet pressure real-time control method, pump inlet pressure measurement data are obtained in real time, topworks can regulate fast continuously.
The utility model engine test inlet pressure closed-loop regulating system schematic diagram comprises fuel pressure boost system, oxidizer pressurizing system, fuel container case, oxidant vessel case, device for pressure measurement and closed-loop control device as shown in Figure 1; The fuel container case all is connected with engine with the oxidant vessel case, and the output terminal of fuel pressure boost system is connected with the fuel container case, and the output terminal of oxidizer pressurizing system is connected with the oxidant vessel case; Device for pressure measurement comprises interconnective harvester and data processor, harvester is gathered the oxidant stress of engine entrance, the fuel pressure of engine entrance, the case of oxidant vessel case is pressed and the case of fuel container case is pressed, harvester is with the oxidant stress of the engine entrance that collects, the fuel pressure of engine entrance, the case of oxidant vessel case is pressed and the case Hair Fixer of fuel container case is given data processor, the output terminal of described data processor is connected with the input end of closed-loop control device, the output terminal of closed-loop control device is connected with the fuel pressure boost system with oxidizer pressurizing system, the control aperture.
Wherein closed-loop control device as shown in Figure 2, comprises control center, industrial computer, timer module, photoelectricity isolation load module and relay output module; Industrial computer is used to control center, timer module, photoelectricity to isolate load module and relay output module provides operation platform; Photoelectricity isolate load module be used for realizing to engine drive, the collection of emergency mobile forces stop signal, and timer module picked up counting or stop the triggering of timing by control center; Timer module is used for carrying out timing, the output timing signal after triggering obtaining picking up counting; Or after obtaining stopping the timing triggering, stop timing; Control center comprises data receiving element, control module and display unit, and the data receiving element is used for receiving in real time the measurement data that data processor sends, and measurement data is exported to display unit; Control module goes periodically to obtain measurement data from the data receiving element according to the clock signal of timer module output, judge simultaneously, control and record, thereby the output control signal is given relay output module and display unit; Display unit is used for measurement data and control signal are shown; Relay output module is used for the control signal according to the control module output of control center, and fuel solenoid valve and oxygenant solenoid valve are exported control.
Accurate for what control, the utility model adopts the orifice plate matrix as the topworks of pressure closed loop control system, fuel pressure boost system and oxidizer pressurizing system have adopted following structure: oxidizer pressurizing system comprise orifice plate matrix that a plurality of oxidant orifices are formed and with oxidant orifice a plurality of oxygenant solenoid valves one to one, oxidant orifice one end is connected with source nitrogen, the other end is connected with the oxidant vessel case by the oxygenant solenoid valve, and the control end of a plurality of oxygenant solenoid valves is connected with the output terminal of closed-loop control device respectively; The fuel pressure boost system comprise orifice plate matrix that a plurality of fuel orifice plates are formed and with a plurality of fuel orifice plates a plurality of fuel solenoid valves one to one, fuel orifice plate one end is connected with source nitrogen, the other end is connected with the fuel container case by the fuel solenoid valve, and the control end of a plurality of fuel solenoid valves is connected with the output terminal of closed-loop control device respectively.
Oxidant orifice is 5, and their area is than being 16:8:4:2:1.Design boosting capability with this and be the orifice plate that 1:2:4:8:16 increases, form the orifice plate matrix that boosting capability can be regulated continuously.Analyze by the selected characteristic test figure, obtain the minimum aperture board size of supercharging accuracy requirement.By-pass valve control is selected solenoid valve for use, can open fast, close.
The fuel orifice plate also can be 4, and their area is than being 8:4:2:1.Though adopt mode pipeline and the equipment of orifice plate matrix more, system complex, each supercharging orifice plate is independently controlled, and control accuracy depends on minimum supercharging orifice plate, does not have the control dead band; Response speed depends on the response speed of single solenoid valve; Each supercharging orifice plate is separate, scattered risks.
The fuel orifice plate also can be other quantity, as long as their area is than reducing 2 times successively.
The control method of engine test inlet pressure closed-loop regulating system may further comprise the steps:
1] builds regulating system;
2] parameter configuration: give timer block configuration clock signal according to user's request;
3] control module disposes the oxidant stress setting value of each time point engine entrance, the fuel pressure setting value of engine entrance, case pressure setting value and the case pressure setting value of fuel container case and the adjustment threshold value of each pressure set points correspondence of oxidant vessel case according to the clock signal of user's request and timer module;
As shown in Figure 4, control module disposes the oxidant stress setting value of each time point engine entrance, the fuel pressure setting value of engine entrance, case pressure setting value and the case pressure setting value of fuel container case and the adjustment threshold value of each pressure set points correspondence of oxidant vessel case according to the clock signal of user's request and timer module; Various setting values are shown as parametric line.
4] start-up system is written into parameter configuration, waits for starting signal;
The collecting unit of device for pressure measurement is gathered the oxidant stress of engine entrance, the fuel pressure of engine entrance, the case pressure of oxidant vessel case and the case of fuel container case and is pressed, send to data processor simultaneously and carry out the data processing, data after the processing send to the data receiving element of control center, and show in real time by display unit;
5] as shown in Figure 3, photoelectricity is isolated the starting signal that load module collects engine, triggers timer module simultaneously and is carrying out timing, timer module output timing signal;
6] control module goes periodically to obtain measurement data from the data receiving element according to the clock signal of timer module output, control module is compared the setting value of measurement data and synchronization, gives relay output module and display unit according to comparison result output control signal;
7] relay output module is controlled opening or closing of solenoid valve according to control signal, realizes the pressure closed loop adjusting, simultaneously the display unit display control signal;
8] photoelectricity is isolated the emergency mobile forces stop signal that load module collects engine, triggers timer module simultaneously and stops timing, and control module quits work.
Be example with the oxidizer systems, at first, orifice plate designs according to boosting capability, and the boosting capability of 5 orifice plates is followed successively by 16:8:4:2:1 to be changed, and realizes regulating continuously fast of boosting capability with this.5 orifice plates are opened corresponding solenoid valve respectively by the solenoid control of 5 relay controls, and then gas carries out supercharging by the orifice plate of correspondence to container, and orifice plate is more big, and boosting capability is more big.Control module is compared the setting value of measurement data and synchronization, give relay output module according to comparison result output control signal, can form 0～31 kind of boosting capability according to 5 orifice plates of control signal, every kind of solenoid valve combination is called a kind of pattern, then have 0～31, boosting capability is 0 according to 0 pattern boosting capability, and mode 31 has represented maximum boosting capability and represented.The corresponding a kind of valve combination of each pattern, as shown in table 1:
Table 1 is the folding of solenoid valve of 5 oxidant orifice correspondences and the relation list of boosting capability.
Relay is opened, and then corresponding valve is opened, and gas carries out supercharging with certain boosting capability to container by the orifice plate of this pipeline correspondence.
Fuel system orifice plate quantity is 4, and the orifice plate boosting capability changes according to 8:4:2:1, and control method is identical with oxidizer systems.
Claims (5)
1. engine test inlet pressure closed-loop regulating system is characterized in that: comprise fuel pressure boost system, oxidizer pressurizing system, fuel container case, oxidant vessel case, device for pressure measurement and closed-loop control device;
Described fuel container case is connected with engine, and described oxidant vessel case is connected with engine, and the output terminal of described fuel pressure boost system is connected with the fuel container case, and the output terminal of described oxidizer pressurizing system is connected with the oxidant vessel case;
Described device for pressure measurement comprises interconnective harvester and data processor, described harvester is gathered the oxidant stress of engine entrance, the fuel pressure of engine entrance, the case of oxidant vessel case is pressed and the case of fuel container case is pressed, described harvester is with the oxidant stress of the engine entrance that collects, the fuel pressure of engine entrance, the case of oxidant vessel case is pressed and the case Hair Fixer of fuel container case is given data processor, the output terminal of described data processor is connected with the input end of closed-loop control device, the output terminal of described closed-loop control device is connected with the fuel pressure boost system with oxidizer pressurizing system, the control aperture.
2. engine test inlet pressure closed-loop regulating system according to claim 1, it is characterized in that: described oxidizer pressurizing system comprise orifice plate matrix that a plurality of oxidant orifices are formed and with oxidant orifice a plurality of oxygenant solenoid valves one to one, described oxidant orifice one end is connected with source nitrogen, the other end is connected with the oxidant vessel case by the oxygenant solenoid valve, and the control end of a plurality of oxygenant solenoid valves is connected with the output terminal of closed-loop control device respectively;
Described fuel pressure boost system comprise orifice plate matrix that a plurality of fuel orifice plates are formed and with a plurality of fuel orifice plates a plurality of fuel solenoid valves one to one, described fuel orifice plate one end is connected with source nitrogen, the other end is connected with the fuel container case by the fuel solenoid valve, and the control end of a plurality of fuel solenoid valves is connected with the output terminal of closed-loop control device respectively.
3. engine test inlet pressure closed-loop regulating system according to claim 2 is characterized in that: described closed-loop control device comprises that control center, industrial computer, timer module, photoelectricity isolates load module and relay output module;
Described industrial computer is used to control center, timer module, photoelectricity to isolate load module and relay output module provides operation platform;
Described photoelectricity isolate load module be used for realizing to engine drive, the collection of emergency mobile forces stop signal, and timer module picked up counting or stop the triggering of timing by control center;
Described timer module is used for carrying out timing, the output timing signal after triggering obtaining picking up counting; Or after obtaining stopping the timing triggering, stop timing;
Described control center comprises data receiving element, control module and display unit, and described data receiving element is used for receiving in real time the measurement data that data processor sends, and measurement data is exported to display unit; Described control module goes periodically to obtain measurement data from the data receiving element according to the clock signal of timer module output, judge simultaneously, control and record, thereby the output control signal is given relay output module and display unit; Described display unit is used for measurement data and control signal are shown;
Described relay output module is used for the control signal according to the control module output of control center, and fuel solenoid valve and oxygenant solenoid valve are exported control.
4. engine test inlet pressure closed-loop regulating system according to claim 3, it is characterized in that: described oxidant orifice is 5, their area is than being 16:8:4:2:1.
5. engine test inlet pressure closed-loop regulating system according to claim 3, it is characterized in that: the fuel orifice plate is 4, their area is than being 8:4:2:1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320154516 CN203224792U (en) | 2013-03-29 | 2013-03-29 | Inlet pressure closed loop adjusting system for testing engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320154516 CN203224792U (en) | 2013-03-29 | 2013-03-29 | Inlet pressure closed loop adjusting system for testing engine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235606A (en) * | 2013-03-29 | 2013-08-07 | 西安航天动力试验技术研究所 | Engine test inlet pressure closed-loop adjusting system and engine test inlet pressure closed-loop adjusting method |
| CN104634375B (en) * | 2013-11-08 | 2017-02-01 | 常州市计量测试技术研究所 | Full-automatic geotechnical instrument mechanical performance detection method |
| CN110554714A (en) * | 2019-07-25 | 2019-12-10 | 西安航天动力试验技术研究所 | Rocket engine storage tank pressure distributed closed-loop adjusting system and method |
| CN114460985A (en) * | 2022-01-04 | 2022-05-10 | 西安航天动力试验技术研究所 | Storage tank pressurization control system and control method based on single chip microcomputer |
-
2013
- 2013-03-29 CN CN 201320154516 patent/CN203224792U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235606A (en) * | 2013-03-29 | 2013-08-07 | 西安航天动力试验技术研究所 | Engine test inlet pressure closed-loop adjusting system and engine test inlet pressure closed-loop adjusting method |
| CN103235606B (en) * | 2013-03-29 | 2016-01-20 | 西安航天动力试验技术研究所 | Engine test inlet pressure closed-loop regulating system and method |
| CN104634375B (en) * | 2013-11-08 | 2017-02-01 | 常州市计量测试技术研究所 | Full-automatic geotechnical instrument mechanical performance detection method |
| CN110554714A (en) * | 2019-07-25 | 2019-12-10 | 西安航天动力试验技术研究所 | Rocket engine storage tank pressure distributed closed-loop adjusting system and method |
| CN114460985A (en) * | 2022-01-04 | 2022-05-10 | 西安航天动力试验技术研究所 | Storage tank pressurization control system and control method based on single chip microcomputer |
| CN114460985B (en) * | 2022-01-04 | 2024-04-05 | 西安航天动力试验技术研究所 | Storage tank pressurization control system and control method based on single chip microcomputer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131002 Effective date of abandoning: 20160120 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |