CN219416671U - Device for durability test of cabin pressure regulating valve - Google Patents

Abstract

The utility model provides a device for durability test of cabin pressure regulating valve, comprising: the device comprises an air source, a closed test space, an air supply regulating valve, a vacuumizing valve, a vacuum pump and a test measurement and control system; a baffle plate is arranged in the closed test space to divide the test space into a first test cabin and a second test cabin; the tested valve is arranged on the partition plate in the two test cabins; the first test cabin is communicated with an air source, and an air supply regulating valve is arranged on a communicating pipe so as to regulate air supply pressure; the second test cabin is communicated with the vacuum pump through a pipeline, and a vacuumizing valve is arranged on the communicating pipeline to regulate the pressure in the second test cabin; and the test measurement and control system adjusts the opening of the air supply regulating valve and the vacuumizing valve according to test requirements so as to enable the pressures of the two test cabins to reach a certain stable negative pressure value. The test device provided by the utility model can be also applied to steady-state performance tests of cabin pressure regulating systems and durability tests of other normal-temperature air medium valves.

Description

Device for durability test of cabin pressure regulating valve

Technical Field

The utility model belongs to the field of fluid machinery, and relates to a device for durability test of normal-temperature air valves such as cabin pressure regulating valves.

Background

Cabin pressure regulating valves mainly refer to cabin exhaust valves, safety valves, negative pressure valves, cabin pressure balancing valves and the like in an aircraft cabin pressure regulating system. The valves are normal-temperature air valves, and air flows from an aircraft pressurizing cabin (a high-pressure cabin) to ambient atmosphere (or other relatively low-pressure cabins) or is supplemented from the ambient atmosphere to the low-pressure cabin through the valve switch or the opening degree adjustment, so that the pressure of the aircraft cabin is adjusted, the overpressure of the cabin is released, or the differential pressure of different cabins is balanced, and the like. The safety valve, the negative pressure valve and the pressure balance valve between cabins are usually pneumatic valves, and the cabin exhaust valve is pneumatic or electric. In order to ensure long-term reliable use of cabin pressure regulating valves after installation, it is necessary to develop a durability test on the ground, i.e. to verify the ability of the valves to maintain their functional performance by long-period valve start-stop or switching cycles.

Disclosure of Invention

The purpose of the utility model is that: in order to examine the durability performance of the cabin exhaust valve, the utility model provides a test device which can provide pressure difference between the ambient atmospheric pressure and the negative pressure test cabin in the cabin exhaust valve test so as to facilitate the durability test research of the cabin pressure regulating valve.

The technical scheme is as follows: an apparatus for cabin pressure regulating flap durability testing, the apparatus comprising: the device comprises an air source, a closed test space, an air supply regulating valve, a vacuumizing valve, a vacuum pump and a test measurement and control system; a baffle plate is arranged in the closed test space to divide the test space into a first test cabin and a second test cabin; the tested valve is arranged on the partition plate in the two test cabins; the first test cabin is communicated with an air source, and an air supply regulating valve is arranged on a communicating pipe so as to regulate air supply pressure; the second test cabin is communicated with the vacuum pump through a pipeline, and a vacuumizing valve is arranged on the communicating pipeline to regulate the pressure in the second test cabin; and the test measurement and control system adjusts the opening of the air supply regulating valve and the vacuumizing valve according to test requirements so as to enable the pressures of the two test cabins to reach a certain stable negative pressure value.

Further, the air source is provided by an air compressor or directly selects the ambient atmosphere.

Furthermore, when the air compressor provides an air source, a pressure limiting valve, a pressure regulating meter and a flowmeter are also connected in series between the air compressor and the test cabin.

Further, the tested valve is a pneumatic valve or an electric valve.

Further, when the tested valve is an electric valve, the opening degree of the electric valve is adjusted through the driving device.

Further, the first test cabin is a simulated cabin, and the second test cabin is a simulated atmosphere cabin.

Further, heating devices and temperature sensors are arranged in the first test cabin and the second test cabin and used for adjusting the ambient temperature in the test cabins.

Further, the temperature sensor collects the environmental temperature in the test cabin in real time and sends the environmental temperature to the test measurement and control system; and the test measurement and control system correspondingly adjusts the heating device according to the test requirement so as to ensure that the environmental temperature in the test cabin meets the test requirement.

The beneficial technical effects are as follows: the test device designed by the utility model is suitable for durability tests such as cabin pressure regulating valve switching cycle, start-stop cycle and the like, and can be also applied to cabin pressure regulating system steady-state performance tests and other normal-temperature air medium valve durability tests in an expanding manner.

According to the test conditions and the test environment, atmospheric air can be directly used as an air source when necessary, the design of an air compressor is omitted, a large amount of electric energy can be saved for the long-term test of the valve endurance test, and the equipment maintenance labor and depreciation cost are correspondingly reduced. Meanwhile, the primary pressure regulation and pressure limitation of the compressed air source by the pressure limiting valve controlled by the test bed measurement and control system are not needed, and the test setting structure is simplified.

The test device provided by the utility model can also change the maximum air supply amount provided for the simulation cabin from the ambient atmosphere by configuring the air supply pipeline with a proper caliber, thereby meeting the test requirements of different products.

The opening state of the relevant valve in the test cycle is determined through parameter adjustment, so that the control logic of test bed measurement and control software can be simplified, the quick and stable test cycle is realized, the waiting time between the test cycles is reduced, and the test period of a single switching cycle or start-stop cycle is shortened.

Drawings

FIG. 1 is a schematic diagram of a cabin pressure regulating valve performance test apparatus embodying the present utility model;

FIG. 2 is a schematic diagram of a cabin pressure regulating valve performance test apparatus optimized in accordance with the present utility model;

wherein, 1 is the compressed air source, 2 is the manometer, 3 is the flowmeter, 4 is the air feed governing valve, 5 is the simulation cabin, 6 is the valve of being tested, 7 is actuating device, 8 is the simulation atmospheric cabin, 9 is the vacuum pump, 10 is the evacuation valve, 11 is the air supplementing valve, 12 is the pressure parameter acquisition system, 13 is test bench measurement and control system, 14 is the pressure limiting valve.

Detailed Description

In the description of the present utility model, it should be noted that terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used merely for convenience in describing the present utility model and simplifying the description based on the azimuth or the positional relationship shown in the drawings, and do not indicate or imply that the apparatus or elements to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like, as used herein, are used for descriptive purposes only and are not to be construed as indicating or implying any relative importance.

Referring to fig. 1, under the design concept of the technical scheme of the utility model, a specifically designed cabin pressure regulating valve performance test device comprises a compressed air source 1, a pressure gauge 2, a flowmeter 3, an air supply regulating valve 4, a simulation cabin 5, a tested valve 6, a driving device 7, a simulation atmosphere cabin 8, a vacuum pump 9, a vacuumizing valve 10, an air compensating valve 11, a pressure parameter acquisition system 12, a test bed measurement and control system 13 and a pressure limiting valve 14; the compressed air source 1 is an air source for providing a test cabin through an air compressor; the compressed air source 1 is connected to the simulation cabin 5 through an air supply pipeline, and a pressure limiting valve 14, a pressure gauge 2, a flowmeter 3 and an air supply regulating valve 4 are sequentially arranged on the air supply pipeline along the airflow direction and are connected with the test bed measurement and control system 13 through control cables for data acquisition or corresponding control; the simulation cabin 5 and the simulation atmosphere cabin 8 form a closed test space for simulating a test environment; the simulation cabin 5 and the simulation atmosphere cabin 8 are separated by a partition board, a tested valve 6 is arranged on the partition board, and air flow between the two test cabins is controlled by the tested valve 6; the simulated atmosphere cabin 8 is communicated with the vacuumizing valve 10 and the vacuum pump 9 through an air supply pipeline, an air compensating valve 11 is further arranged on the air supply pipeline, and the opening of the vacuumizing valve 10 and the opening of the air compensating valve 11 are regulated through the test bed measurement and control system 13 to control the internal pressure of the simulated atmosphere cabin 8.

The tested valve is arranged between the two simulated vacuum cabins to carry out valve start-stop or switch cycle test; and simulate the working conditions of inlet and outlet pressure (or pressure difference) of the valve, air flow flowing through the valve and the like according to the actual use environment. Because the valves are normal temperature valves, the temperature of air media used in the test is not required, and the negative pressure working environment is realized by using a vacuum pump to suck the simulated vacuum cabin, of course, in the concrete test, when the environment temperature variable is required, the heating device and the temperature sensor can be arranged in the two test cabins in an increased design.

For the defect that air flowing through the valve is supplied with air source by the air compressor, a large amount of electric energy is consumed in a long-period test, and therefore, the utility model is further improved in the implementation process; the cabin pressure regulating valve performance test set obtained in an improved design mode is shown in fig. 2, the tested valve 6 is arranged between two simulated vacuum test cabins, namely a simulated cabin 5 and a simulated atmosphere cabin 8, wherein the simulated atmosphere cabin 8 is used for simulating the atmospheric environment pressure outside the aircraft cabin or the aircraft low-pressure cabin pressure, and the simulated cabin 5 is used for simulating the aircraft cabin or other relatively high-pressure cabin pressure. The pressure, pressure difference and the like of the two simulated vacuum test cabins are measured by the pressure parameter acquisition system 12 and then transmitted to the test bed measurement and control system 13. The vacuum pump 9 sucks the simulated atmosphere cabin 8 to form negative pressure, and the opening of the vacuumizing valve 10 and the air compensating valve 11 are regulated by the test bed measurement and control system 13 to control the internal pressure of the simulated atmosphere cabin 8. The outside of the simulation cabin is connected with an air supply pipeline, and the simulation cabin is directly led to the environment atmosphere, and the test bed measurement and control system 13 controls the opening of the air supply regulating valve 4 according to the pressure of the vacuum experiment cabin, the flowmeter 3 on the air supply pipeline and other data, so that the working condition meets the valve test requirement.

For pneumatic valves such as a safety valve, a negative pressure valve and the like, the pressure leading pipe joint is connected to a corresponding cabin according to the requirement so as to drive the valve to open and close; for the electric cabin vent valve, the drive device 7 is used to control its switch (including from full on to full off and between any particular opening). The test procedure is described below with the electric cabin vent valve on-off cycle test and the safety valve on-off cycle test, respectively.

The utility model relates to the above two test devices, which are specifically designed, wherein the initial state of the electric cabin exhaust valve switch cycle test is as follows: the exhaust valve of the electric cabin is opened, the air supply regulating valve 4 is opened (full or specific opening), the vacuumizing valve 10 is opened, and the air compensating valve 11 is closed. The vacuum pump 4 is started, at the moment, the ambient atmosphere enters the simulation cabin 5 and then is discharged to the simulation atmosphere cabin 8 through the tested product 6, and the vacuumizing valve 10 and the air compensating valve 11 are regulated to enable the pressures of the two vacuum test cabins to reach a certain stable negative pressure value. The test bed measurement and control system 13 adjusts the vacuumizing valve 10, the air compensating valve 11 and the air supply adjusting valve 4 according to the collected parameters, and when the air supply flow value measured by the flowmeter 3 and the vacuum test cabin pressure value measured by the pressure parameter collection system 12 meet the test condition requirements, the air exhaust valve of the electric cabin is closed; when the pressure difference between the simulated cabin 5 and the simulated atmosphere cabin 8, namely the pressure difference born by the tested valve 6 in the closed state, meets the requirement of the test working condition, the exhaust valve of the electric cabin is opened again. Repeating the steps to finish the switch cycle test. When the compressed air source 1 is adopted as the air source, the primary pressure regulation and pressure limitation of the compressed air source 1 by the pressure limiting valve 14 controlled by the test bed measurement and control system 13 is needed before the test, so as to ensure the reliability of the test.

Initial state of safety valve start-stop test: the safety valve is closed, the air supply regulating valve 4 is opened (full or specific opening), the vacuumizing valve 10 is opened, and the air compensating valve 11 is closed. The vacuum pump 4 is started, the vacuumizing valve 10 and the air compensating valve 11 are regulated to enable the pressure difference between the simulated cabin 5 and the simulated atmosphere cabin to reach the opening pressure difference value of the safety valve, and then the safety valve is automatically opened. After the stable balance state is reached, the test bed measurement and control system 13 adjusts the vacuumizing valve 10, the air compensating valve 11 and the air supply regulating valve 4 according to the collected parameters, and when the air supply flow value measured by the flowmeter 3 and the pressure difference value of the two vacuum test cabins measured by the pressure parameter collection system 12 meet the test working condition requirements, the opening degree of the air supply regulating valve 4 is adjusted to be small or closed, so that the pressure in the simulated cabin 5 is reduced, and the pressure difference between the inlet and the outlet of the safety valve is lower than the opening pressure difference value to be closed. Repeating the steps to finish the start-stop cycle test.

Specific air supply pipeline caliber can be configured according to specific tested valve 6 and test working condition requirements thereof, the opening state of a valve related to a test bed is determined through debugging preparation, and related parameters are set in a test bed measurement and control system 13, so that quick and stable test cycle is realized, waiting time between test cycles is reduced, and test cycle of single switching cycle or start-stop cycle is shortened.

The utility model has been described in detail with reference to the drawings or specific embodiments thereof, wherein it is noted that some, but not all, of the disclosed examples are illustrated in the accompanying drawings. Indeed, many different examples may be described and these examples should not be construed as limited to only the examples set forth herein. Rather, these examples are described so that this disclosure will be thorough and complete, and will be apparent to those skilled in the art from consideration of the present disclosure.

Claims (8)

1. An apparatus for cabin pressure regulating flap durability testing, the apparatus comprising: the device comprises an air source, a closed test space, an air supply regulating valve, a vacuumizing valve, a vacuum pump and a test measurement and control system; a baffle plate is arranged in the closed test space to divide the test space into a first test cabin and a second test cabin; the tested valve is arranged on the partition plate in the two test cabins; the first test cabin is communicated with an air source, and an air supply regulating valve is arranged on a communicating pipe so as to regulate air supply pressure; the second test cabin is communicated with the vacuum pump through a pipeline, and a vacuumizing valve is arranged on the communicating pipeline to regulate the pressure in the second test cabin; and the test measurement and control system adjusts the opening of the air supply regulating valve and the vacuumizing valve according to test requirements so as to enable the pressures of the two test cabins to reach a certain stable negative pressure value.

2. An apparatus for a cabin pressure regulator valve durability test according to claim 1 wherein the air supply is provided by an air compressor or directly selects the ambient atmosphere.

3. The apparatus for durability test of cabin pressure regulating valve according to claim 2, wherein a pressure limiting valve, a pressure regulating gauge, a flow meter are further connected in series between the air compressor and the test cabin when the air compressor provides the air source.

4. The apparatus for cabin pressure regulating valve durability test of claim 1 wherein the valve under test is a pneumatic valve or an electric valve.

5. The apparatus for a cabin pressure regulating valve durability test according to claim 4, wherein when the tested valve is an electric valve, the opening degree of the electric valve is regulated by a driving device.

6. The apparatus for a cabin pressure regulating valve durability test of claim 1, wherein the first test cabin is a simulated cabin and the second test cabin is a simulated atmosphere cabin.

7. The apparatus for a cabin pressure regulating valve durability test according to claim 6, wherein a heating device and a temperature sensor are disposed in both the first test cabin and the second test cabin for regulating the ambient temperature in the test cabin.

8. The apparatus for cabin pressure regulating valve durability test of claim 7 wherein said temperature sensor collects ambient temperature in the test cabin in real time and sends to the test measurement and control system; and the test measurement and control system correspondingly adjusts the heating device according to the test requirement so as to ensure that the environmental temperature in the test cabin meets the test requirement.