CN-118758404-B - Aviation liquid flowmeter test bed

Abstract

The invention discloses a test bed of a liquid flowmeter for aviation, which comprises an oil storage tank, wherein the oil storage tank is respectively communicated with a calibration oil return pipeline, a service life verification loop pipeline and a flow measurement precision calibration and service life simultaneous verification loop, and the calibration oil return pipeline, the service life verification loop pipeline, the flow measurement precision calibration and service life simultaneous verification loop are mutually connected in parallel. The invention can calibrate the flow measurement precision of the flowmeter according to the fuel consumption curve of the fuel in the actual flight process of the airplane, can perform a long-time life verification test on the flowmeter according to the fuel consumption curve of the fuel in the actual flight process of the airplane through software setting, and can calibrate the flow measurement precision and perform the long-time life verification test on the flowmeter according to the fuel consumption curve of the fuel in the actual flight process of the airplane.

Inventors

• HE LIAN
• WANG YUQIAO
• LI BO
• CHEN SHUAI
• WANG GANG

Assignees

• 四川泛华航空仪表电器有限公司

Dates

Publication Date

20260508

Application Date

20240626

Claims (5)

1. 1. The aviation liquid flowmeter test bed is characterized by comprising an oil storage tank, wherein the oil storage tank is respectively communicated with a calibration oil return pipeline, a service life verification loop pipeline and a flow measurement precision calibration and service life simultaneous verification loop, and the calibration oil return pipeline, the service life verification loop pipeline, the flow measurement precision calibration and service life simultaneous verification loop are mutually connected in parallel; the calibration oil return pipeline is used for calibrating flow measurement precision, and comprises a variable frequency pump, a pneumatic ball valve, a steady flow container, a passive piston volume tube group, a meter clamping group, a standard flow meter and a residual oil collecting box which are connected in series through pipelines, wherein the residual oil collecting box is communicated with an oil storage tank through the pipelines; the life verification loop pipeline is used for a long-time life verification test and comprises a variable frequency pump, a pneumatic ball valve, a steady flow container, a passive piston volume tube group, a meter clamping group, a three-way valve and a residual oil collecting box which are sequentially connected in series through pipelines, wherein the residual oil collecting box is communicated with an oil storage tank through the pipelines; The flow measurement precision calibration and life time verification loop is used for simultaneously carrying out flow measurement precision calibration and long-time life time verification tests, and comprises a variable frequency pump, a pneumatic ball valve, a steady flow container, a passive piston volume tube group, a meter clamping device group, a standard flow meter group and a filter which are sequentially connected in series through a pipeline, wherein the filter is communicated with an oil storage tank through the pipeline; The system is connected with a PC, and the system controls the output of the passive piston volume tube set to be matched with the actual flight fuel consumption curve of the aircraft by inputting V-H parameters corresponding to the flow and time through the PC.
2. 2. The test stand for the aviation liquid flowmeter according to claim 1, wherein pneumatic ball valves, variable frequency pumps and filters are further arranged on the pipelines for communicating the residual oil collecting box with the oil storage tank.
3. 3. The test stand for an aviation liquid flowmeter according to claim 1, wherein the passive piston volume tube group is provided with at least two passive piston volume tubes connected in parallel, and the front end and the rear end of a parallel pipeline where each passive piston volume tube is located are respectively provided with an independent pneumatic ball valve.
4. 4. An aviation liquid flowmeter test stand according to claim 1, wherein said meter clamping group is provided with at least two meter clamping devices connected in parallel.
5. 5. The test stand for an aviation liquid flowmeter according to claim 1, wherein the standard flowmeter set is provided with at least three standard flowmeters connected in parallel, and each standard flowmeter is provided with an independent pneumatic ball valve on a parallel pipeline.

Description

Aviation liquid flowmeter test bed Technical Field The invention relates to the technical field of aviation flow calibration, in particular to a test bed of a liquid flowmeter for aviation. Background The liquid flowmeter test bed can be used for simulating a fuel consumption curve of fuel in the flight process of an aircraft, and is used for carrying out flowmeter measurement accuracy and service life test verification. The instantaneous flow detection and the accumulated flow detection can provide accurate information of the residual fuel amount of the fuel in the fuel tank for pilots, detect the working state of an aircraft engine, perform fault detection on an aircraft fuel system and provide control parameters for the aircraft fuel system. The accuracy and reliability of fuel oil quantity detection are directly related to the control accuracy and reliability of the aircraft fuel system, and further related to the flight safety of the whole aircraft. When the domestic fuel flowmeter can only be used by an airplane at present, a plurality of constant fuel flow calibration points are selected according to the actual fuel flow range to carry out flow measurement precision calibration, or a certain constant fuel rate is used for carrying out a period of life verification test, and then the constant fuel rate is manually replaced to continue carrying out the period of life verification test. The flow measurement precision calibration method cannot calibrate the flow meter according to the fuel consumption curve of the fuel in the actual flight process of the aircraft, cannot set the flow meter through software, perform long-time life verification test according to the fuel consumption curve of the fuel in the actual flight process of the aircraft, and cannot calibrate the flow measurement precision and perform long-time life verification test according to the fuel consumption curve of the fuel in the actual flight process of the aircraft. Disclosure of Invention The invention aims to provide a liquid flowmeter test bed which simulates a fuel consumption curve of fuel in the actual flight process of an aircraft and can simultaneously carry out flow measurement precision calibration and long-time service life verification test on a flowmeter. The aviation liquid flowmeter test bed is characterized by comprising an oil storage tank, wherein the oil storage tank is respectively communicated with a calibration oil return pipeline, a life verification loop pipeline and a flow measurement precision calibration and life simultaneous verification loop, and the calibration oil return pipeline, the life verification loop pipeline, the flow measurement precision calibration and life simultaneous verification loop are mutually connected in parallel; the calibration oil return pipeline is used for calibrating flow measurement accuracy; The service life verification loop pipeline is used for a long-time service life verification test; The flow measurement precision calibration and life simultaneous verification loop is used for simultaneously carrying out flow measurement precision calibration and long-time life verification test. The technical scheme is that a tested flowmeter is arranged in a test pipeline through a meter clamping device, a variable frequency pump is adopted to pump fuel from an oil storage tank to generate flow, fluid flows through a steady flow container and a degassing filter to enter a passive volume pipe, the passive volume pipe is controlled by a measurement and control system to control the flow speed of the fuel and the time of the fuel passing through the tested flowmeter to generate a V-H fuel flow curve corresponding to the flow speed and the time, the fuel flows through the tested flowmeter, the measurement and control system collects output signals of the tested flowmeter to process and analyze, the fuel flowing through the tested flowmeter returns to the oil storage tank through a calibrated return oil pipeline or a life verification loop pipeline. The invention can set constant fuel rate to calibrate the measuring precision of the flowmeter, and select a plurality of flow points in the linear flow range of the flowmeter to measure the measuring precision of the flowmeter, wherein the measuring precision a of each flow calibration point is as follows: Q Actual measurement -is the current fuel flow measured by the flowmeter in liters per hour (L/h) Q Standard of -Standard flow for test stand in liters per hour (L/h) A-measuring accuracy of current flow measuring point According to the fuel consumption curve of the fuel in the actual flight process of the aircraft, the V-H parameters corresponding to the flow and the time can be input into a test bed through software setting, the test bed outputs the corresponding standard flow according to time coordinates by controlling a passive volume pipe and a standard flowmeter, so that the fuel consumption curve of the fuel in the actual flight pr