A reference end pressure stabilizing device for a barometer

Abstract

The application belongs to the field of aero-engine whole machine test, and particularly relates to a reference end pressure stabilizing device of a gas pressure measuring instrument. The device comprises a stabilizing box and a stabilizing plate, and an adapter joint is installed on the box cover. The first end of the first adapter joint is connected with an atmospheric pressure sensor through a first gas pipe, and the second end of the first adapter joint is communicated with the inside of the stabilizing box. The first end of the second adapter joint is connected with the reference end of the gas pressure measuring instrument through a second gas pipe, and the second end of the second adapter joint is communicated with the inside of the stabilizing box. The first end of the third adapter joint is communicated with the outside environment through a third gas pipe, and the second end of the third adapter joint is communicated with the inside of the stabilizing box through a fourth gas pipe. The stabilizing plate is installed in the inside of the stabilizing box, and divides the inside space of the stabilizing box into multiple local spaces which are communicated with each other. The application can make the atmospheric pressure measurement not affected by the engine test state, and the reference end pressure of the gas pressure measuring instrument and the pressure of the atmospheric pressure sensor are kept consistent.

Description

Technical Field

[0001] This application belongs to the field of aero-engine whole-machine testing, and specifically relates to a pressure stabilization device for the reference end of a barometer. Background Technology

[0002] During the overall test of an aero-engine, it is necessary to measure gas pressures such as atmospheric pressure, total pressure, and static pressure. The accuracy of the measurement directly affects the calculation and analysis of engine performance parameters. An atmospheric pressure sensor is used to measure the ambient atmospheric pressure, and a barometer is used to measure the total pressure and static pressure. The atmospheric pressure sensor is installed in the test room, and the barometer is installed in the test room or test workshop depending on the specific situation. When the overall test is carried out, the atmospheric pressure in the test room and the atmospheric pressure in the test workshop will change with the engine status. This may lead to the following problems: (1) The atmospheric pressure measurement value in the test room changes with the engine test status, affecting the accuracy of the ambient atmospheric pressure measurement. The atmospheric pressure measurement value is related to the engine test status and the room sealing. During the test, the atmospheric pressure measurement value changes with the engine status, such as Figure 1 As shown. (2) The pressure at the reference end of the barometer changes with the engine test conditions, affecting the accuracy of the engine pressure parameter measurement. (3) When the measured total pressure and static pressure are converted from gauge pressure to absolute pressure, the accuracy of the inlet air flow calculation is affected by the atmospheric pressure measurement value.

[0003] To avoid inconsistencies in environmental pressure between the test chamber and proving ground due to engine conditions, some test benches currently install atmospheric pressure sensors near the barometer in the test chamber. This aims to keep the atmospheric pressure and the reference pressure of the barometer as consistent as possible, reducing errors in total pressure and static pressure measurements. However, this method cannot solve the problem of inconsistencies between atmospheric pressure and the reference pressure when the atmospheric pressure sensor and the barometer are not in the same room. It also cannot address the issue of atmospheric pressure and the reference pressure of the barometer changing with engine test conditions, affecting the accuracy of atmospheric pressure, total pressure, and static pressure parameter measurements.

[0004] Therefore, it is desirable to have a technical solution to overcome or at least mitigate one of the aforementioned defects of the prior art. Summary of the Invention

[0005] The purpose of this application is to provide a pressure stabilization device for the reference end of a barometer to solve at least one problem existing in the prior art.

[0006] The technical solution of this application is:

[0007] A pressure stabilization device for the reference end of a barometer, comprising:

[0008] The voltage regulator box has a sealed enclosure structure and a cover. The cover is equipped with a first adapter, a second adapter, and a third adapter.

[0009] The first end of the first adapter is connected to the atmospheric pressure sensor via a first air tube, and the second end of the first adapter is connected to the inside of the pressure stabilizing box.

[0010] The first end of the second adapter is connected to the reference end of the barometer via a second air tube, and the second end of the second adapter is connected to the inside of the pressure stabilizing box.

[0011] The first end of the third adapter is connected to the external environment through the third air pipe, and the second end of the third adapter is connected to the inside of the pressure stabilizing box through the fourth air pipe.

[0012] A voltage regulator board is installed inside the voltage regulator box, dividing the internal space of the voltage regulator box into multiple interconnected local spaces.

[0013] In at least one embodiment of this application, the third adapter is located at the center of the cover.

[0014] In at least one embodiment of this application, the end of the third air tube away from the third adapter is fixed inside the weather station.

[0015] In at least one embodiment of this application, the voltage regulator plate (4) is provided with a plurality of micro holes with a diameter of 5 mm.

[0016] In at least one embodiment of this application, a plurality of voltage stabilizing plates are arranged along the axial direction of the voltage stabilizing box, each voltage stabilizing plate is respectively installed on the inner side wall of the voltage stabilizing box, and two adjacent voltage stabilizing plates are arranged opposite to each other.

[0017] In at least one embodiment of this application, each of the pressure stabilizing plates is provided with a through hole, and the end of the fourth air pipe away from the third adapter passes through the through holes on the multiple pressure stabilizing plates and is accommodated in a local space away from the box cover.

[0018] In at least one embodiment of this application, the voltage stabilizing plate includes a first voltage stabilizing plate and a second voltage stabilizing plate disposed opposite to each other. Both the first voltage stabilizing plate and the second voltage stabilizing plate are provided with through holes. The first voltage stabilizing plate is located at half the axial position of the voltage stabilizing box, and the second voltage stabilizing plate is close to the box cover and located at a quarter the axial position of the voltage stabilizing box.

[0019] In at least one embodiment of this application, the end of the fourth air tube away from the third adapter passes through the through holes on the first pressure stabilizing plate and the second pressure stabilizing plate and is accommodated in a local space away from the box cover.

[0020] In at least one embodiment of this application, the bottom of the voltage regulator box is covered with voltage-stabilizing balls.

[0021] The invention has at least the following beneficial technical effects:

[0022] The pressure stabilization device for the reference end of the barometer in this application connects the pressure stabilizing box to the outdoor ambient atmosphere, so that the atmospheric pressure measurement is not affected by the engine test status, and achieves accurate and stable atmospheric pressure measurement; at the same time, the atmospheric pressure sensor and the reference end of the barometer are connected to the pressure stabilizing box to ensure that the atmospheric pressure and the pressure at the reference end of the barometer are consistent, which improves the accuracy of total pressure and static pressure measurement and reduces the error of air flow measurement. Attached Figure Description

[0023] Figure 1 It is the atmospheric pressure test state curve;

[0024] Figure 2 This is a schematic diagram of a pressure stabilization device for the reference end of a barometer according to one embodiment of this application.

[0025] in:

[0026] 1-Pressure stabilizing box; 11-First adapter; 12-Second adapter; 13-Third adapter; 2-Atmospheric pressure sensor; 3-Barometric pressure measuring instrument; 4-Pressure stabilizing board; 5-Weather station. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0028] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this application.

[0029] The following is in conjunction with the appendix Figure 2 This application will be described in further detail.

[0030] This application provides a pressure stabilization device for the reference end of a barometer, including a pressure stabilizing box 1 and a pressure stabilizing plate 4 disposed inside the pressure stabilizing box 1.

[0031] Specifically, such as Figure 2 As shown, the pressure stabilizing box 1 has a sealed box structure with a lid on top. Three adapters are installed on the lid: a first adapter 11, a second adapter 12, and a third adapter 13. The first end of the first adapter 11 is connected to the atmospheric pressure sensor 2 via a first air pipe, and the second end of the first adapter 11 communicates with the interior of the pressure stabilizing box 1. The first end of the second adapter 12 is connected to the reference end of the barometer 3 via a second air pipe, and the second end of the second adapter 12 communicates with the interior of the pressure stabilizing box 1. The first end of the third adapter 13 communicates with the external environment via a third air pipe, and the second end of the third adapter 13 communicates with the interior of the pressure stabilizing box 1 via a fourth air pipe. A pressure stabilizing plate 4 is installed inside the pressure stabilizing box 1, dividing the internal space of the pressure stabilizing box 1 into multiple interconnected local spaces. In this embodiment, preferably, the third adapter 13 is located at the center of the lid, with the first adapter 11 and the second adapter 12 located on either side of the third adapter 13.

[0032] The pressure stabilization device for the reference end of the barometer in this application uses a pressure stabilizing box 1 as a sealed container with good sealing performance, which can keep the atmospheric pressure stable and consistent with the reference end pressure of the barometer 3. The atmospheric pressure sensor 2 is used to measure the ambient atmospheric pressure, and the barometer 3 is used to measure the engine air pressure parameters. The atmospheric pressure sensor 2, the barometer 3 and the atmospheric environment are connected through multiple adapters and air pipes. By fixing the end of the third air pipe away from the third adapter 13 inside the weather station 5, the outdoor end of the pressure stabilizing box is connected to the atmospheric environment.

[0033] In a preferred embodiment of this application, the pressure stabilizing plate 4 is a porous solid plate with multiple micro-holes of 5mm diameter evenly distributed on it. Multiple pressure stabilizing plates 4 are arranged along the axial direction of the pressure stabilizing box 1, and each pressure stabilizing plate 4 is installed on the inner side wall of the pressure stabilizing box 1. Adjacent pressure stabilizing plates 4 are arranged opposite each other. The multiple pressure stabilizing plates 4 can divide the internal space of the pressure stabilizing box 1 into multiple interconnected local spaces, forming an S-shaped flow channel between them. Each pressure stabilizing plate 4 has a through hole. The end of the fourth gas pipe away from the third adapter 13 passes through the through hole on the multiple pressure stabilizing plates 4 and is accommodated in the local space away from the box cover, thereby connecting the outlet end of the fourth gas pipe to the local space at the bottom.

[0034] In one embodiment of this application, the pressure stabilizing plate 4 includes a first pressure stabilizing plate and a second pressure stabilizing plate disposed opposite to each other. Both the first and second pressure stabilizing plates have through holes. The first pressure stabilizing plate is located at the halfway point of the axial direction of the pressure stabilizing box 1, and the second pressure stabilizing plate is located near the box cover and at the quarter-way point of the axial direction of the pressure stabilizing box 1, thereby dividing the internal space of the pressure stabilizing box 1 into three interconnected local spaces. The end of the fourth air pipe away from the third adapter 13 passes through the through holes on the first and second pressure stabilizing plates and is accommodated in the local space away from the box cover. It is understood that the arrangement of the pressure stabilizing plate 4 in this application is not limited to the above embodiment. In practical applications, the arrangement of the pressure stabilizing plate 4 can be implemented according to the specific dimensions of the pressure stabilizing box 1.

[0035] Advantageously, in this embodiment, the bottom of the voltage regulator box 1 is also covered with multiple voltage stabilizing balls, the diameter of which is approximately 15mm.

[0036] The pressure stabilization device at the reference end of the barometer in this application addresses the issue that changes in cross-section or local obstruction of airflow can alter the direction or velocity of localized airflow, causing collisions or vortices between air particles and resulting in localized energy loss. Outdoor ambient air is introduced into the pressure stabilizing box 1 via a pipe. The pipe inlet is fixed within the weather station 5 on the test platform. After the outside airflow enters the pressure stabilizing box 1 through the pipe, the cross-section of the airflow changes. The airflow then encounters obstruction from the pressure stabilizing ball and plate 4 within the pressure stabilizing box 1, resulting in localized energy loss and achieving the goal of stabilizing atmospheric pressure. Connecting the atmospheric pressure sensor 2 and the reference end of the pressure measuring instrument 3 to the pressure stabilizing box 1 stabilizes both atmospheric pressure and the pressure at the reference end of the pressure measuring instrument 3, eliminating the influence of engine status changes on atmospheric pressure measurement and reference end pressure, and reducing measurement errors for low-pressure parameters such as total pressure and static pressure.

[0037] The pressure stabilization device at the reference end of the barometer in this application eliminates the error in measuring ambient atmospheric pressure caused by changes in engine status during the whole-machine test, which leads to changes in ambient atmospheric pressure; it also eliminates the influence of the whole-machine test on the reference end pressure of the barometer, making the ambient atmospheric pressure and the reference end pressure of the barometer consistent, eliminating the error in the absolute pressure calculation value, and improving the accuracy of the calculation of parameters such as inlet air flow; it has a simple structure, is easy to implement, and has a low cost.

[0038] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A pressure stabilization device for the reference end of a barometer, characterized in that, include: The voltage regulator box (1) is a sealed box structure. The voltage regulator box (1) has a box cover, on which a first adapter (11), a second adapter (12), and a third adapter (13) are installed. The first end of the first adapter (11) is connected to the atmospheric pressure sensor (2) through the first air pipe, and the second end of the first adapter (11) is connected to the inside of the pressure stabilizing box (1). The first end of the second adapter (12) is connected to the reference end of the barometer (3) through the second air pipe, and the second end of the second adapter (12) is connected to the inside of the pressure stabilizing box (1); The first end of the third adapter (13) is connected to the external environment through the third air pipe, and the second end of the third adapter (13) is connected to the inside of the pressure stabilizing box (1) through the fourth air pipe. A voltage stabilizer plate (4) is installed inside the voltage stabilizer box (1) to divide the internal space of the voltage stabilizer box (1) into multiple interconnected local spaces; The voltage stabilizer plate (4) is uniformly provided with multiple micro holes with a diameter of 5mm; Multiple voltage stabilizers (4) are arranged along the axial direction of the voltage stabilizer box (1). Each voltage stabilizer (4) is installed on the inner side wall of the voltage stabilizer box (1), and two adjacent voltage stabilizers (4) are arranged opposite to each other. The bottom of the voltage stabilizer box (1) is covered with voltage stabilizing balls; The third adapter (13) is located at the center of the box cover; The end of the third air tube away from the third adapter (13) is fixed inside the weather station (5); Each of the pressure stabilizing plates (4) has a through hole. The end of the fourth air pipe away from the third adapter (13) passes through the through holes on the multiple pressure stabilizing plates (4) and is accommodated in a local space away from the box cover.

2. The pressure stabilizing device for the reference end of the barometer according to claim 1, characterized in that, The voltage stabilizing plate (4) includes a first voltage stabilizing plate and a second voltage stabilizing plate arranged opposite to each other. Both the first voltage stabilizing plate and the second voltage stabilizing plate are provided with through holes. The first voltage stabilizing plate is located at half the axial position of the voltage stabilizing box (1), and the second voltage stabilizing plate is close to the box cover and located at a quarter the axial position of the voltage stabilizing box (1).

3. The pressure stabilizing device for the reference end of the barometer according to claim 2, characterized in that, The end of the fourth air pipe away from the third adapter (13) passes through the through holes on the first pressure stabilizing plate and the second pressure stabilizing plate and is then housed in a local space away from the box cover.

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