CN216846904U - Pipeline system and test device - Google Patents
Pipeline system and test device Download PDFInfo
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- CN216846904U CN216846904U CN202220699500.9U CN202220699500U CN216846904U CN 216846904 U CN216846904 U CN 216846904U CN 202220699500 U CN202220699500 U CN 202220699500U CN 216846904 U CN216846904 U CN 216846904U
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Abstract
The utility model provides a pipe-line system and test device can guarantee the steady on-line switch-over of the mode of admitting air to can withdraw from the pressurization mode of admitting air of heating fast, and control logic is simple reliable. The test device is used for testing the aircraft engine, comprises the pipeline system, the pipeline system comprises a heating and pressurizing air inlet branch and an atmospheric air inlet branch, the atmospheric air inlet branch comprises a switch valve, a one-way valve and a pressure difference detection device, the switch valve is connected with the one-way valve in series, and the pressure difference detection device is used for detecting the pressure difference at two ends of the switch valve.
Description
Technical Field
The utility model relates to an aeroengine tests technical field, concretely relates to pipe-line system and test device.
Background
The core engine test bed of the aircraft engine needs to be matched with public works to provide an air source, a cooling circulating water resource and the like for a heating and pressurizing test, the test cost is often high, before the heating and pressurizing test is carried out, a performance benchmark test is usually carried out in an atmospheric air inlet state, and steady state performance data is recorded and used for core engine state comparison, so that the core engine test bed usually has atmospheric air inlet test capability and heating and pressurizing capability, and can be switched in an air inlet mode according to needs, including hot switching (on-line switching in a core engine running state) and cold switching (switching in a core engine stop state), and the existing core engine test bed usually needs to adopt complex control logic to realize stable on-line switching of the air inlet mode.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a pipe-line system can guarantee the steady on-line switch-over of mode of admitting air to can withdraw from the pressurization mode of admitting air of heating fast, and control logic is simple reliable.
In order to realize the pipeline system of purpose for aeroengine's test device, including heating pressurization air intake branch road and atmosphere air intake branch road, atmosphere air intake branch road includes ooff valve, check valve and pressure differential detection device, the ooff valve with the check valve is established ties, pressure differential detection device is used for detecting the pressure differential at the both ends of ooff valve.
In one or more embodiments of the piping system, the differential pressure detecting device is a differential pressure transmitter.
In one or more embodiments of the piping system, the differential pressure detecting device includes: the first pressure measuring unit is used for measuring the pressure of the first end of the switch valve and providing a first pressure detection signal; the second pressure measuring unit is used for measuring the pressure of the second end of the switch valve and providing a second pressure detection signal; a comparison unit for receiving and comparing the first pressure detection signal and the second pressure detection signal; and the output unit is used for outputting the comparison result of the comparison unit.
In one or more embodiments of the piping system, the pressure difference detection device includes a display unit for displaying the pressure difference.
Another object of the utility model is to provide a test device can guarantee the steady on-line switch of the mode of admitting air to can withdraw from the pressurization mode of admitting air of heating fast, and control logic is simple reliable.
The testing device for achieving the purpose comprises the pipeline system.
In one or more embodiments of the test device, the test device further comprises a controller, the pressure difference detection device comprises an output unit for outputting a detection signal of the pressure difference, and the output unit is in signal connection with the controller.
In one or more embodiments of the test device, the test device further comprises a controller in signal connection with the on-off valve for controlling the position of the on-off valve.
In one or more embodiments of the testing apparatus, the testing apparatus further includes a controller, the warming and pressurizing air inlet branch includes a regulating valve, and the controller is in signal connection with the regulating valve and is used for controlling the opening of the regulating valve.
This test device and pipe-line system are through setting up the ooff valve at atmosphere air inlet branch road, pressure differential detection device and check valve, adopt pressure differential detection device to detect the pressure differential at ooff valve both ends, in order to judge and be in the mode of heating pressurization air inlet or atmosphere air inlet, and guarantee the stability of admission pressure through the self-adaptation regulation of the aperture of check valve, can simplify control logic, the online switch-over of the mode of admitting air is carried out steadily, can also withdraw from the mode of heating pressurization air inlet fast, and can prevent that pressurized gas from getting into atmosphere air inlet tower against the current, and simple structure, and easy to realize, the cost is lower.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:
fig. 1 is a schematic view of a piping system of a comparative example.
Fig. 2 is a schematic view of a piping system according to an embodiment of the present invention.
Fig. 3 is a schematic process diagram of the switching of the duct system from the atmospheric air intake mode to the warmed pressurized air intake mode according to the embodiment of fig. 2.
FIG. 4 is a schematic process diagram of the switching of the conduit system from the warmed pressurized intake mode to the atmospheric intake mode according to the embodiment of FIG. 2.
FIG. 5 is a schematic illustration of inlet pressure distortion during multiple intake mode switching for the ductwork system according to the embodiment of FIG. 2.
Detailed Description
The following discloses many different embodiments or examples for implementing the subject technology described. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and are not intended to limit the scope of the present invention. It is to be noted that the drawings are designed solely as examples and are not to scale, and should not be construed as limiting the scope of the invention as it is actually claimed. Furthermore, some of the features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.
Fig. 1 is a schematic diagram of a piping system 1 'of a core test stand of a comparative example, the piping system 1' including a warming and pressurizing intake branch 10 'and an atmospheric intake branch 20'. The upstream end of the warming and pressurizing air inlet branch 10 'is supplied with air by an air source station 11, the upstream end of the atmosphere air inlet branch 20' is supplied with air by an atmosphere air inlet tower 21, the downstream ends of the warming and pressurizing air inlet branch 10 'and the atmosphere air inlet branch 20' are both connected to a rectifying chamber 30, and the rectifying chamber 30 is in fluid connection with an air inlet channel (not shown) of a core engine (not shown).
In the description of the present invention, the terms "upstream" and "downstream" refer to relative directions with respect to fluid flow in a fluid channel. For example, "upstream" refers to the direction from which the fluid flows, and "downstream" refers to the direction to which the fluid flows.
With continued reference to fig. 1, the warming and pressurizing intake branch 10 'and the atmospheric intake branch 20' are respectively provided with a first regulating valve 12 and a second regulating valve 22, and the intake pressure and temperature of the core engine can be simulated by regulating the opening degrees of the first regulating valve 12 and the second regulating valve 22.
In the case of switching between the warming and pressurizing air intake mode and the atmospheric air intake mode, the control device (not shown) needs to control the adjustment rates of the first regulating valve 12 and the second regulating valve 22 by using a complex control logic, so that the second regulating valve 22 changes along with the change of the opening degree of the first regulating valve 12, so as to keep the air intake of the core engine stable during the switching process, and avoid the reverse flow of the gas of the warming and pressurizing air intake branch 10 'to the atmospheric air intake branch 20', which causes air intake loss and/or damages a silencing element in the atmospheric air intake tower 21.
Under the condition that the warming and pressurizing air inlet mode needs to be exited urgently, the scheme of the comparative example cannot make a quick response, and particularly when the opening or closing rate of the first regulating valve 12 and the second regulating valve 22 is not matched with the core machine reduction rate, for example, when the closing rate of the first regulating valve 12 is faster than the core machine reduction rate, the inlet pressure of the core machine is reduced to negative pressure (vacuum pumping), and when the closing rate of the first regulating valve 12 is slower than the core machine reduction rate, the inlet pressure of the core machine is increased, which is not beneficial to the core machine to exit the warming and pressurizing air inlet mode smoothly and quickly.
A test apparatus according to an embodiment of the present invention will be described with reference to fig. 2 to 5. The testing device is used for core machine tests of the aircraft engine and comprises a pipeline system 1. The pipe system 1 comprises a warming and pressurizing air inlet branch 10 and an atmosphere air inlet branch 20.
The upstream end of the warming and pressurizing air inlet branch 10 is supplied with air by an air source station 11, the upstream end of the atmosphere air inlet branch 20 is supplied with air by an atmosphere air inlet tower 21, the downstream ends of the warming and pressurizing air inlet branch 10 and the atmosphere air inlet branch 20 are both connected to a rectifying chamber 30, and the rectifying chamber 30 is in fluid connection with an air inlet channel (not shown) of a core machine (not shown). The warming and pressurizing intake branch 10 includes a first regulating valve 12, and the atmospheric intake branch 20 includes an on-off valve 23, a differential pressure detecting device 24, and a check valve 25.
The differential pressure detecting device 24 is used for detecting the pressure difference between the two ends of the on-off valve 23 to determine whether the mode is the warming and pressurizing air intake mode or the atmospheric air intake mode, for example, when the pressure difference between the upstream end and the downstream end of the on-off valve 23 becomes negative, which indicates that the core engine is completely supplied with the warming and pressurizing air intake branch 10, at this time, closing the on-off valve 23 will not cause significant fluctuation to the pressure of the whole flow chamber 30, the on-line switching from the atmospheric air intake mode to the warming and pressurizing air intake mode can be smoothly completed, and the gas in the warming and pressurizing air intake branch 10 can be prevented from flowing back to the atmospheric air intake branch 20, causing air intake loss and/or damaging the silencing element in the atmospheric air intake tower 21.
The check valve 25 is connected in series with the on-off valve 23, for example, is disposed on the upstream side of the on-off valve 23, the check valve 25 includes a valve plate (not shown) and a spring (not shown), the opening degree of the check valve 25 corresponds to the elastic force of the spring, the check valve 25 automatically opens when the pressure difference between the upstream end and the downstream end of the check valve 25 is greater than the opening pressure of the check valve 25, and the check valve 25 automatically closes when the pressure at the downstream end of the check valve 25 increases to a certain degree. The check valve 25 is used to keep the core inlet pressure stable during the inlet mode switching process, as will be described in detail later. In addition, during the switching from the atmospheric air intake mode to the warming and pressurizing air intake mode, when the on-off valve 23 fails, the check valve 25 may also be used to prevent the gas in the warming and pressurizing air intake branch 10 from flowing backward to the atmospheric air intake branch 20.
In one embodiment, the differential pressure detecting device 24 includes a first pressure measuring unit (not shown), a second pressure measuring unit (not shown), for example, using pressure sensors, a comparing unit (not shown), and an output unit (not shown), the first and second pressure measuring units being used to measure the pressures at the first and second ends of the on-off valve 23, respectively, and provides a first pressure detection signal and a second pressure detection signal, respectively, a comparison unit for receiving and comparing the first pressure detection signal and the second pressure detection signal, an output unit for outputting a comparison result of the comparison unit, i.e., the pressure difference between the first end and the second end of the switching valve 23, for example, the comparison result is displayed through a display unit (not shown) or/and transmitted to a controller (not shown).
The following describes the intake mode switching process of the test device according to an embodiment of the present invention with reference to fig. 3 and 4, and line L in fig. 3 and 41Line L, representing the inlet pressure (kPa) of the core engine2Line L, representing the inlet air flow (kg/s) of the core engine3The line L represents the opening (%) of the first regulator valve 124A position signal (0 is closed and 1 is open) indicating the on-off valve 23.
In this embodiment, the differential pressure detecting device 24 is a differential pressure transmitter, so as to simplify the structure of the pipeline system 1, reduce the number of components, and facilitate installation, and the high pressure port and the low pressure port of the differential pressure transmitter are respectively connected with the upstream end and the downstream end of the switch valve 23, that is, in the atmospheric air intake test, the reading of the differential pressure transmitter is a positive value.
Fig. 3 exemplarily shows a process of switching from the atmospheric air intake mode to the warmed pressurized air intake mode:
1. starting the core machine to a certain stopping rotation speed in an atmospheric air inlet mode, wherein the inlet pressure (pressure before switching) of the core machine is P0；
2. The first regulating valve 12 of the heating and pressurizing air inlet branch 10 is gradually opened manually, high-temperature and high-pressure air is slowly introduced into the core machine, meanwhile, the pressure of the downstream ends of the switch valve 23 and the one-way valve 25 is gradually increased by the high-pressure air, the reading of the differential pressure transmitter is gradually reduced, and the opening degree of the one-way valve 25 is gradually reduced under the action of the pressure difference of the two ends of the one-way valve and the elastic force of the spring;
3. when the indication value of the differential pressure transmitter becomes negative or is in a critical state of numerical value conversion, for example, the numerical value is displayed in the range of 0 +/-0.2 kPa, the switch valve 23 is closed, the check valve 25 is automatically adjusted to be in a closed state or close to the closed state, and the air inlet of the core machine is completely provided by the warming and pressurizing air inlet branch circuit 10, so that the online switching from the atmospheric air inlet mode to the warming and pressurizing air inlet mode can be smoothly completed.
Fig. 4 exemplarily shows a process of switching from the warmed pressurized intake mode to the atmospheric intake mode:
the inlet pressure is first adjusted to the aforementioned pre-switching pressure P0And the indication of the differential pressure transmitter becomes positive value or is in a critical state of numerical value conversion, for example, the numerical value is displayed in the range of 0 +/-0.2 kPa, the switch valve 23 is opened, the first regulating valve 12 is manually regulated to be completely closed, at the moment, the core machine acts on the valve plate of the one-way valve 25 through the suction force of the core machine, so that the valve plate is automatically opened by overcoming the spring force of the one-way valve 25, and the opening degree is automatically regulated according to the suction force of the core machine, thereby smoothly completing the online switching from the heating and pressurizing air inlet mode to the atmospheric air inlet mode.
Fig. 5 shows the inlet pressure distortion of the core engine during the repeated switching of the pipe system 1 between the atmospheric air intake mode and the warming-pressurizing air intake mode, and the pressure distortion is calculated by measuring the (maximum pressure-minimum pressure)/average pressure of the cross section.
The verification shows that in the switching process, the air inlet pressure of the core engine is stable, the inlet pressure fluctuation is not more than 3kPa, the inlet pressure distortion is less than 0.7 percent, the boundary layer is included, if 1 point closest to the wall surface of an air inlet channel of the core engine is removed, the inlet pressure distortion can be lower than 0.1 percent and is far lower than the requirement of 1 percent specified by GJB 241A-2010 general Specification for aviation turbojet and turbofan engines, the switching process is rapid, and the switching of the air inlet mode can be completed within 60s as fast as possible according to the state of the core engine.
Because the switch valve 23 can complete full opening or full closing in a short time, when the heating and pressurizing air inlet mode needs to be quitted quickly in case of emergency, the first regulating valve 12 is closed quickly, the switch valve 23 can be opened quickly to keep the air inlet pressure of the core machine relatively stable, at the moment, the core machine acts on the valve plate of the one-way valve 25 through the suction force of the core machine, the valve plate overcomes the spring force of the one-way valve 25 to be opened automatically, and the smoothness and the stability of the atmosphere air inlet branch circuit 20 are kept. In addition, the spring force of the check valve 25 can also ensure that the check valve 25 does not completely close during the atmospheric air intake rapid transition state (deceleration) test.
Therefore, the testing device and the pipeline system 1 are provided with the switch valve 23, the differential pressure detection device 24 and the check valve 25 on the atmosphere air inlet branch 20, the differential pressure detection device 24 is adopted to detect the differential pressure at two ends of the switch valve 23 so as to judge that the air inlet mode is in the heating and pressurizing air inlet mode or the atmosphere air inlet mode, the stability of the air inlet pressure is ensured through the self-adaptive adjustment of the opening degree of the check valve 25, the control logic can be simplified, the online switching of the air inlet mode can be stably carried out, the heating and pressurizing air inlet mode can be rapidly quitted, the pressurized air can be prevented from reversely flowing into the atmosphere air inlet tower 21, and the testing device and the pipeline system are simple in structure, easy to implement and low in cost.
Further, when the differential pressure detection device 24 has a display function, the switching valve 23 and the first regulating valve 12 can be manually adjusted according to the differential pressure displayed by the differential pressure detection device 24, so that the smooth on-line switching of the air inlet mode is realized, a controller is not required to be arranged for adjustment, the structure of the test device and the pipeline system 1 is further simplified, and the cost is reduced.
In another embodiment, the testing apparatus further comprises a controller (not shown) in signal connection with the differential pressure detection device 24 to output a detection signal of the pressure difference across the switch valve 23 to the controller through an output unit of the differential pressure detection device 24, and the controller is further in signal connection with the first regulating valve 12 and the switch valve 23 to obtain state signals of the regulating valve 12 and the switch valve 23 and control the opening of the first regulating valve 12 and the position of the switch valve 23, so that the air intake state of the core engine can be automatically judged and the switching of the air intake mode can be controlled through the controller.
The controller includes one or more hardware processors, such as one or more combinations of microcontrollers, microprocessors, Reduced Instruction Set Computers (RISC), Application Specific Integrated Circuits (ASIC), Application Specific Integrated Processors (ASIP), Central Processing Units (CPU), Graphics Processing Units (GPU), Physical Processing Units (PPU), microcontroller units, Digital Signal Processors (DSP), Field Programmable Gate Arrays (FPGA), Advanced RISC Machines (ARM), Programmable Logic Devices (PLD), any circuit or processor capable of executing one or more functions, and so forth.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention, all without departing from the content of the technical solution of the present invention, fall within the scope of protection defined by the claims of the present invention.
Claims (8)
1. The pipeline system is used for a test device of an aircraft engine and comprises a heating and pressurizing air inlet branch and an atmospheric air inlet branch, and is characterized in that the atmospheric air inlet branch comprises a switch valve, a one-way valve and a pressure difference detection device, the switch valve is connected with the one-way valve in series, and the pressure difference detection device is used for detecting the pressure difference at two ends of the switch valve.
2. The piping system of claim 1 wherein said differential pressure sensing device is a differential pressure transmitter.
3. The piping system of claim 1, wherein said differential pressure detecting means comprises:
the first pressure measuring unit is used for measuring the pressure of the first end of the switch valve and providing a first pressure detection signal;
the second pressure measuring unit is used for measuring the pressure of the second end of the switch valve and providing a second pressure detection signal;
a comparison unit for receiving and comparing the first pressure detection signal and the second pressure detection signal;
and the output unit is used for outputting the comparison result of the comparison unit.
4. The piping system according to claim 1, wherein said differential pressure detecting means comprises a display unit for displaying said differential pressure.
5. Test device for testing an aircraft engine, characterized in that it comprises a pipe system according to any one of claims 1 to 4.
6. The testing device of claim 5, further comprising a controller, wherein the differential pressure detection device comprises an output unit for outputting a detection signal of the differential pressure, and the output unit is in signal connection with the controller.
7. The test device of claim 5, further comprising a controller in signal communication with the on-off valve for controlling the position of the on-off valve.
8. The testing apparatus of claim 5, further comprising a controller, wherein the warming and pressurizing inlet branch comprises a regulating valve, and the controller is in signal connection with the regulating valve and is used for controlling the opening degree of the regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220699500.9U CN216846904U (en) | 2022-03-23 | 2022-03-23 | Pipeline system and test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220699500.9U CN216846904U (en) | 2022-03-23 | 2022-03-23 | Pipeline system and test device |
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| Publication Number | Publication Date |
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| CN216846904U true CN216846904U (en) | 2022-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220699500.9U Active CN216846904U (en) | 2022-03-23 | 2022-03-23 | Pipeline system and test device |
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| CN (1) | CN216846904U (en) |
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- 2022-03-23 CN CN202220699500.9U patent/CN216846904U/en active Active
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