CN109632250B - Spray pipe thrust calibration and measurement device capable of changing different storage chamber profiles - Google Patents
Spray pipe thrust calibration and measurement device capable of changing different storage chamber profiles Download PDFInfo
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- CN109632250B CN109632250B CN201811505693.4A CN201811505693A CN109632250B CN 109632250 B CN109632250 B CN 109632250B CN 201811505693 A CN201811505693 A CN 201811505693A CN 109632250 B CN109632250 B CN 109632250B
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- storage chamber
- spray pipe
- inner cavity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0007—Fluidic connecting means
Abstract
The invention discloses a spray pipe thrust calibration device with variable different storage chamber profiles, which comprises a spray pipe storage chamber section, a pressure gauge joint, a plug, an adjusting screw and a thrust calibration unit, wherein the thrust calibration unit comprises a force measurement balance and a high-pressure pipeline, the spray pipe storage chamber section is provided with a storage chamber inner cavity, a mounting hole penetrating through the storage chamber inner cavity is formed in the right side wall of the storage chamber inner cavity and is used for being connected with the force measurement balance and communicating with the high-pressure pipeline, a spray pipe penetrating through the storage chamber inner cavity is formed in the upper side wall of the spray pipe storage chamber, a threaded hole penetrating through the storage chamber inner cavity is formed in the left side wall opposite to the right side of the spray pipe storage chamber, a threaded hole is formed in the lower side wall opposite to the spray pipe, the two adjusting screws are screwed into the two threaded holes respectively, and a connecting hole is formed in the rear side wall of the. The device can be used for spray pipe thrust calibration tests of different storage chamber profiles.
Description
Technical Field
The invention belongs to the technical field of experimental devices, relates to a lateral jet thrust measurement test device for a ground calibration stage at the early stage of a jet wind tunnel test, and particularly relates to a spray pipe thrust calibration device capable of changing different storage chamber profiles.
Background
The reaction force (RCS) generated by the lateral jet flow can change the motion attitude or orbit of the aircraft, has the functions of supplementing the insufficient efficiency of the pneumatic control surface and quickly changing the flight state, and is applied to various aircrafts at home and abroad: for example PAC-3, THAAD, Aster, HTV-2, returner and various novel high-mobility aircrafts in China, RCS control technology has become the essential key technology of the aircrafts. However, jet flow and outflow flow interference cause the surface and space flow of the aircraft to change significantly, additional aerodynamic force and moment are generated, the control system design needs to obtain accurate surface load characteristics and aerodynamic characteristics, wind tunnel tests and numerical prediction are important means for providing the above results, and the wind tunnel tests are also important ways for verifying the simulation precision of the numerical method and guiding the improvement direction of the numerical method.
By adopting a force measuring wind tunnel test method, the amplification factor of jet flow interference can be obtained:
amplification factor
Wherein Ti represents the self thrust/moment value of the jet flow, and Fi with the jet flow and Fi without the jet flow respectively represent the pneumatic load under the conditions of the presence/absence of the incoming flow.
Jet gas enters the storage chamber along a high-pressure pipeline and is sprayed out through the spray pipe after being subjected to steady flow in the storage chamber, so that the storage chamber is one of key links of the design of the whole test model. When the jet flow dynamometric model is designed, the size of the model is limited by the scale of the shrinkage ratio, and the design space of the storage chamber is strictly limited, so that the profile of the storage chamber is irregular or the space is too small, and the design of the test model is possibly unreasonable. The working performance of the storage chamber can be checked in advance through the calibration device, and the design of an actual model is guided.
No nozzle thrust calibration device for different reservoir profiles has been reported.
Disclosure of Invention
The invention aims to solve the problem that no spray pipe thrust calibration device for different storage chamber profiles exists, and provides a spray pipe thrust calibration device for different storage chamber profiles, which can be connected with a jet flow balance and a high-pressure pipeline and connected with a spray pipe storage chamber section by using different adjusting screws to achieve the function of calibrating the thrust of the spray pipe for different storage chamber profiles.
Therefore, the thrust calibration device of the spray pipe for different storage chamber profiles comprises a spray pipe storage chamber section, a pressure gauge joint, a plug, an adjusting screw and a thrust calibration unit, wherein the thrust calibration unit comprises a force measuring balance and a high-pressure pipeline,
the spray pipe storage chamber section is provided with a storage chamber inner cavity, a mounting hole penetrating through the storage chamber inner cavity is formed in the right side wall of the storage chamber inner cavity, the spray pipe is used for being connected with the force measuring balance and communicated with the high-pressure pipeline, the spray pipe penetrating through the storage chamber inner cavity is formed in the upper side wall of the spray pipe, a threaded hole penetrating through the storage chamber inner cavity is formed in the left side wall opposite to the right side wall of the spray pipe, a threaded hole is formed in the lower side wall opposite to the spray pipe, two adjusting screws are screwed into the two threaded holes respectively, and a connecting hole is formed in the rear side wall and used for being in threaded connection with the pressure gauge.
Preferably, one end of the high-pressure pipeline is communicated with a high-pressure air source, and the other end of the high-pressure pipeline is in threaded connection with the internal thread of the mounting hole, which is close to the inner cavity of the storage chamber.
Preferably, before the test, the pressure gauge joint connected with the pressure gauge is connected into the connecting hole and used for measuring the total pressure of the inner cavity of the storage chamber, after the total pressure is measured, the pressure gauge joint is detached, and the plug is connected into the connecting hole so as to test the thrust.
Preferably, the adjusting screw is made into a plurality of screws with different lengths according to requirements, and the volume of the inner cavity of the storage chamber is changed by replacement, so that the thrust of the spray pipe with different storage chamber profiles can be calibrated.
Preferably, the upper profile and the lower profile of the nozzle are both conical, and the throat is cylindrical.
Preferably, one end of the mounting hole of the spray pipe storage chamber section is provided with a columnar inner molded surface which is used for being connected with a force measuring balance and is fixed through a positioning pin.
Preferably, both ends of the pressure gauge joint are external threads, one end of the pressure gauge joint is connected with the internal threads in the connecting hole of the spray pipe storage chamber section in a matched mode and is sealed through an O-shaped ring, and the other end of the pressure gauge joint is connected with the pressure gauge and is used for monitoring the total pressure of the inner cavity of the storage chamber.
Preferably, one end of the plug is provided with an external thread, the external thread is matched and connected with an internal thread in the connecting hole of the spray pipe storage chamber section, and the internal thread is sealed through an O-shaped ring.
Preferably, the adjusting screws are connected in threaded bores of the nozzle reservoir section in the direction of the nozzle axis and perpendicular thereto, respectively, and are sealed by O-rings, respectively.
Preferably, the connecting hole is divided into two sections, one section is a small-diameter unthreaded hole close to the inner cavity of the storage chamber, and the other end is a threaded hole used for connecting the pressure gauge joint or the plug.
The invention at least comprises the following beneficial effects:
(1) the invention designs the spray pipe thrust calibration device for different storage chamber profiles, and solves the problem that no spray pipe thrust calibration device for different storage chamber profiles exists in the ground calibration stage of the jet flow interference test.
(2) One end of a pressure gauge joint is connected with the spray pipe storage chamber section, the other end of the pressure gauge joint can be connected with a pressure gauge, and the total pressure value of the storage chamber can be obtained in real time in the test process; or after the pressure loss of the pipeline is obtained, the pressure gauge joint is replaced by the plug.
(3) The adjusting screw and the spray pipe storage chamber section are connected and sealed in a mode of adding the O-shaped ring into the threads, and storage chamber conditions with different molded surfaces can be conveniently realized by using screws with different specifications.
(4) The connection of the high-pressure pipeline and the spray pipe storage section, the connection of the pressure gauge joint (plug) and the spray pipe storage section, and the connection of the adjusting screw and the spray pipe storage section are sealed by adopting a mode of adding the O-shaped ring into the threads, and the process is simple and has good feasibility.
(5) The device is stable and reliable after being verified by multiple repeatability tests.
Drawings
FIG. 1(1), (2), (3) is a schematic diagram of a nozzle thrust calibration device for different reservoir profiles;
fig. 2 is a schematic structural diagram of 7 adjusting screws with different lengths.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
Based on the requirements of the jet flow test, the jet pipe thrust calibration device for the ground calibration stage of the jet flow test is specially designed and manufactured. As shown in FIG. 1, the present invention provides a nozzle thrust calibration apparatus for different reservoir profiles, comprising:
the spray pipe storage chamber section 1 is internally provided with a spray pipe and a storage chamber, one end of the spray pipe storage chamber section is connected with the force measuring balance and is connected with a high-pressure pipeline to provide jet flow gas for the test device, and the other two ends of the spray pipe storage chamber section are connected with an adjusting screw; and
one end of the pressure gauge connector 2 is connected with the spray pipe storage section, and the other end of the pressure gauge connector is connected with a pressure gauge through a proper connector; and
the plug 3 is connected with the storage chamber section and is used in replacement with the pressure gauge joint; and
and an adjusting screw 4 connected with the spray pipe storage chamber section.
In one embodiment of the present invention, preferably, the nozzle thrust calibration apparatus for different reservoir profiles further includes:
the upper molded surface and the lower molded surface of the spray pipe storage section 1 are both conical, and the throat is cylindrical; one end of the inner cylindrical profile is connected with the force measuring balance and fixed by a positioning pin; the pressure gauge is provided with four internal threads, one part is used for being connected with a high-pressure pipeline, the other part is used for being connected with a pressure gauge joint (or a plug), and the other two parts are used for being connected with an adjusting screw.
In one embodiment of the present invention, preferably, the nozzle thrust calibration apparatus for different reservoir profiles further includes:
In one embodiment of the present invention, preferably, the nozzle thrust calibration apparatus for different reservoir profiles further includes:
and one end of the plug 3 is provided with an external thread, is connected with the spray pipe storage chamber section and is sealed through an O-shaped ring.
In one embodiment of the present invention, preferably, the nozzle thrust calibration apparatus for different reservoir profiles further includes:
and the adjusting screws 4 are respectively connected with the spray pipe storage chamber section in the direction along the axis of the spray pipe and in the direction perpendicular to the axis of the spray pipe and are sealed through O-shaped rings.
Fig. 2 shows 7 different specifications of adjusting screws in the example, which can be easily replaced for calibration tests of different profiles of reservoir conditions.
In one embodiment of the invention, a device for calibrating thrust of a spray pipe for different reservoir profiles comprises a spray pipe reservoir section 1, a pressure gauge joint 2, a plug 3 and an adjusting screw 4, and the technical scheme comprises the following steps:
(1) and (5) designing. The jet pipe thrust calibration device for providing different reservoir profiles for jet flow model design comprises reservoir design, jet pipe design and sealing design.
(2) And (4) manufacturing. In order to ensure the reliability of the calibration result, the manufacturing process ensures that the precision and the roughness of the molded surfaces of the storage chamber section of the spray pipe, the throat of the spray pipe and the expansion section meet the experimental requirements.
(3) And (6) mounting. The connection of the high-pressure pipeline and the spray pipe storage chamber section, the connection of the pressure gauge joint (plug) and the spray pipe storage chamber section, and the connection of the adjusting screw and the spray pipe storage chamber section are sealed in a mode of adding an O-shaped ring into threads.
(4) Application is carried out. A number of spray tube thrust calibration tests of different reservoir profiles have been carried out in the laboratory using the device and different adjusting screws (see figure 2), indicating that the stability and repeatability of the test device are satisfactory.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (9)
1. The utility model provides a spray tube thrust calibration and measurement device of variable different storage chamber profiles which characterized in that: comprises a spray pipe storage chamber section, a pressure gauge joint, a plug, an adjusting screw and a thrust calibration unit, wherein the thrust calibration unit comprises a force measuring balance and a high-pressure pipeline,
the spray pipe storage chamber section is provided with a storage chamber inner cavity, the right side wall of the storage chamber inner cavity is provided with a mounting hole which is communicated with the storage chamber inner cavity and is used for being connected with the force measuring balance and communicating with the high-pressure pipeline, the upper side wall of the spray pipe is provided with a spray pipe which is communicated with the storage chamber inner cavity, the left side wall of the spray pipe opposite to the right side wall is provided with a threaded hole which is communicated with the storage chamber inner cavity, the lower side wall opposite to the spray pipe is provided with a threaded hole, two adjusting screws are screwed into the two threaded holes respectively, and the rear side wall is provided with a connecting hole which is used for being in threaded connection with;
the adjusting screws are made into a plurality of screws with different lengths according to needs, and the volume of the inner cavity of the storage chamber is changed by replacement, so that thrust of the spray pipes with different storage chamber profiles can be calibrated.
2. The thrust calibration device for nozzles with variable reservoir profiles as set forth in claim 1, wherein: one end of the high-pressure pipeline is communicated with a high-pressure air source, and the other end of the high-pressure pipeline is in threaded connection with the aid of internal threads in the mounting hole, close to the inner cavity of the storage chamber.
3. The thrust calibration device for nozzles with variable reservoir profiles as set forth in claim 1, wherein: before the test, the pressure gauge joint connected with the pressure gauge is connected into the connecting hole and used for measuring the total pressure of the inner cavity of the storage chamber, after the total pressure is measured, the pressure gauge joint is detached, and the plug is connected into the connecting hole so as to test the thrust.
4. The thrust calibration device for nozzles with variable reservoir profiles as set forth in claim 1, wherein: the upper profile and the lower profile of the spray pipe are both conical, and the throat is cylindrical.
5. The thrust calibration device for nozzles with variable reservoir profiles as set forth in claim 1, wherein: one end of the mounting hole of the spray pipe storage chamber section is provided with a columnar inner molded surface which is used for being connected with the force measuring balance and is fixed through a positioning pin.
6. The thrust calibration device for nozzles with variable reservoir profiles as set forth in claim 1, wherein: the both ends that the manometer connects are the external screw thread, and one end is connected with the interior screw-thread fit in the spray tube storage chamber section connecting hole to sealed through O type circle, the other end is connected with the manometer for the total pressure of monitoring storage chamber inner chamber.
7. The thrust calibration device for nozzles with variable reservoir profiles as set forth in claim 1, wherein: one end of the plug is provided with an external thread which is matched and connected with an internal thread in the connecting hole of the spray pipe storage chamber section and sealed by an O-shaped ring.
8. The thrust calibration device for nozzles with variable reservoir profiles as set forth in claim 1, wherein: the adjusting screws are respectively connected in threaded holes of the spray pipe storage chamber section along the axis direction of the spray pipe and in the direction perpendicular to the axis of the spray pipe and are respectively sealed through O-shaped rings.
9. The thrust calibration device for nozzles with variable reservoir profiles according to any of claims 1 to 8, characterized in that: the connecting hole is divided into two sections, one section is a small-diameter unthreaded hole close to the inner cavity of the storage chamber, and the other end is a threaded hole used for connecting the pressure gauge joint or the plug.
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| CN201811505693.4A CN109632250B (en) | 2018-12-10 | 2018-12-10 | Spray pipe thrust calibration and measurement device capable of changing different storage chamber profiles |
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| CN201811505693.4A CN109632250B (en) | 2018-12-10 | 2018-12-10 | Spray pipe thrust calibration and measurement device capable of changing different storage chamber profiles |
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| CN109632250A CN109632250A (en) | 2019-04-16 |
| CN109632250B true CN109632250B (en) | 2020-12-18 |
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| CN114486166A (en) * | 2021-12-29 | 2022-05-13 | 中国航天空气动力技术研究院 | Model and system for control surface jet flow interference force measurement test |
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