Titanium alloy diaphragm fatigue test system

Abstract

The invention discloses a titanium alloy diaphragm fatigue test system, and belongs to the technical field of fatigue test, the titanium alloy diaphragm fatigue test system comprises an electric control device, the electric control device is provided with a power supply inlet and a signal outlet, the power supply inlet is connected with a direct current power supply, and the signal outlet is connected with a first solenoid valve and a second solenoid valve. One end of the first electromagnetic valve is connected with a first pipeline connecting piece, the other end of the first pipeline connecting piece is connected with an air pressure test bench, the other end of the first electromagnetic valve is connected with a second pipeline connecting piece, and the other end of the second pipeline connecting piece is connected with a first throttling element. By adopting the titanium alloy diaphragm fatigue test system, the test time and the diaphragm production period are greatly shortened, and the test cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of fatigue testing, in particular to a titanium alloy diaphragm fatigue testing system. Background Art

[0002] Titanium alloy diaphragms are thin-walled structural components characterized by high strength, corrosion resistance, good deformation capacity, and long fatigue life. They are widely used in propellant management systems in aerospace systems, particularly at the outlets of aerospace engine fuel and oxidizer tanks, where they serve as important components for pressure isolation and sealing control. Their role is to ensure system sealing integrity and fluid control accuracy during the propellant charging and discharging process, playing a key role in ensuring the stable operation of spacecraft propulsion systems.

[0003] Titanium alloy diaphragms typically operate under high-frequency, variable loads and complex thermal environments, subjecting them to extensive cyclic stress and strain over long periods of service. Therefore, their fatigue performance, particularly their low-strain-amplitude, high-cycle life, is a key indicator of overall aircraft reliability and mission safety. Any diaphragm failure caused by fatigue damage could result in fuel leakage, system pressure imbalance, or even mission failure.

[0004] At present, the fatigue performance evaluation of titanium alloy diaphragms still mainly relies on traditional air pressure test platforms. However, due to the excessive number of times the diaphragm is inflated and deflated during the test, simply using an air pressure test bench to perform inflation and deflation tests on the diaphragm will consume too much manpower and time, increasing the test cost. Summary of the Invention

[0005] The purpose of the present invention is to provide a titanium alloy diaphragm fatigue testing system to solve the problems mentioned in the background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides a titanium alloy diaphragm fatigue test system, including an electronic control device, wherein the electronic control device is provided with a power inlet and a signal outlet, the power inlet is connected to a DC power supply, the signal outlet is connected to solenoid valve 1 and solenoid valve 2, one end of solenoid valve 1 is connected to pipe connector 1, the other end of pipe connector 1 is connected to an air pressure test bench, the other end of solenoid valve 1 is connected to pipe connector 2, and the other end of pipe connector 2 is connected to throttling element 1.

[0007] Preferably, the electronic control device includes a box body, a box cover, a solenoid valve control button 1, a solenoid valve control button 2, an electronic counter, a power cable and a signal cable. The box cover is set on the box body by fastening screws, the solenoid valve control button 1, the solenoid valve control button 2 and the electronic counter are all set on the box cover, the power cable is connected to the box body through the power inlet, and the signal cable is connected to the box body through the signal outlet.

[0008] Preferably, the other end of the air pressure test bench is connected to an air source, the other end of the throttling element one is connected to a pipeline connector three, the other end of the pipeline connector three is connected to a cavity, and the other end of the cavity is connected to the solenoid valve two through a pipeline connection assembly.

[0009] Preferably, the pipeline connection assembly includes pipeline connection piece 4, pipeline connection piece 5 and pipeline connection piece 6, one end of pipeline connection piece 4 is connected to the cavity, and the other end of pipeline connection piece 4 is connected to pipeline connection piece 5 and pipeline connection piece 6.

[0010] Preferably, the other end of the pipeline connector five is connected to the solenoid valve two, and the other end of the pipeline connector six is connected to a product testing tool.

[0011] Preferably, a pipeline connector seven is connected above the second solenoid valve, the other end of the pipeline connector seven is connected to a throttling element two, and an exhaust port is provided above the second throttling element.

[0012] Preferably, the capacity of the cavity is set to 50 ml.

[0013] Preferably, the DC power supply is a 27V DC power supply.

[0014] Preferably, the gas source is a nitrogen bottle.

[0015] Preferably, the air pressure test bench is provided with a pressure reducer and a pressure transmitter, and the pressure transmitter is provided at the rear end of the pressure reducer.

[0016] Therefore, the present invention adopts the above-mentioned titanium alloy diaphragm fatigue testing system, which has the following beneficial effects: the testing system greatly shortens the testing time and the diaphragm production cycle, and reduces the testing cost.

[0017] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a titanium alloy diaphragm fatigue testing system according to an embodiment of the present invention; Reference numerals 1. Electronic control device; 2. Power inlet; 3. Signal outlet; 4. Solenoid valve 1; 5. Solenoid valve 2; 6. Pipeline connector 1; 7. Pipeline connector 2; 8. Throttling element 1; 9. Pipeline connector 3; 10. Cavity; 11. Pipeline connection assembly; 12. Pipeline connector 4; 13. Pipeline connector 5; 14. Pipeline connector 6; 15. Product test fixture; 16. Pipeline connector 7; 17. Throttling element 2; 18. Exhaust port. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0021] Example like Figure 1 As shown, the present invention provides a titanium alloy diaphragm fatigue test system, including an electronic control device 1. The electronic control device 1 is provided with a power inlet 2 and a signal outlet 3. The power inlet 2 is connected to a DC power supply. The signal outlet 3 is connected to a solenoid valve 1 4 and a solenoid valve 2 5. One end of the solenoid valve 1 4 is connected to a pipe connector 1 6. The other end of the pipe connector 1 6 is connected to an air pressure test bench. The other end of the solenoid valve 1 4 is connected to a pipe connector 2 7. The other end of the pipe connector 2 7 is connected to a throttling element 1 8. The other end of the air pressure test bench is connected to an air source. The other end of the throttling element 1 8 is connected to a pipe connector 3 9. The other end of the pipe connector 3 9 is connected to a chamber 10. The other end of the chamber 10 is connected to a pipe connection assembly 11. The electronic control device counts by collecting the operating electrical signal of the exhaust solenoid valve. Each time the exhaust solenoid valve operates, the electronic counter on the electronic control device increments by 1.

[0022] The electronic control device includes a box body, a box cover, a solenoid valve 1 control button, a solenoid valve 2 control button, an electronic counter, a power cable, and a signal cable. The box cover is attached to the box body with screws. The solenoid valve 1 control button, the solenoid valve 2 control button, and the electronic counter are all mounted on the box cover. The power cable is connected to the box body via power inlet 2, and the signal cable is connected to the box body via signal outlet 3.

[0023] The electronic control device controls solenoid valves 1 and 2 and records the number of tests. Conventional tests use a pneumatic test bench to control the inflation and deflation of the test process, a cumbersome process that wastes significant testing time and manpower. This device eliminates the need for frequent operation of the pneumatic test bench. The pneumatic test bench only needs to maintain a constant pressure throughout the test, while inflation and deflation are handled by solenoid valves 1 and 2.

[0024] The pipeline connection assembly 11 includes a pipeline connection piece 4 12, a pipeline connection piece 5 13 and a pipeline connection piece 6 14. One end of the pipeline connection piece 4 12 is connected to the cavity 10, and the other end of the pipeline connection piece 4 12 is connected to the pipeline connection piece 5 13 and the pipeline connection piece 6 14. The other end of the pipeline connection piece 5 13 is connected to the solenoid valve 2 5, and the other end of the pipeline connection piece 6 14 is connected to the product testing tooling 15. The solenoid valve 2 5 is connected to the top of the pipeline connection piece 7 16, and the other end of the pipeline connection piece 7 16 is connected to the throttling element 2 17. An exhaust port 18 is provided above the throttling element 2 17.

[0025] The capacity of the chamber 10 is set to 50 ml, the DC power supply is a 27 V DC power supply, and the gas source is a nitrogen cylinder.

[0026] The air pressure test bench is equipped with a pressure reducer and a pressure transmitter. The pressure transmitter is located at the rear end of the pressure reducer. The nitrogen source enters the test bench's pressure gauge (used to measure the source pressure) from the test bench's inlet and is then reduced in pressure by the pressure regulator. The pressure transmitter is located at the rear end of the pressure regulator to accurately collect the output pressure and pressure change curve at the test bench's outlet.

[0027] Working principle: Connect the nitrogen bottle to the inlet of the pressure test bench and connect the other structures of the test system to Figure 1 Connect and access the outlet of the air pressure test bench, connect the electronic control device 1 to the 27VDC power supply, and the air pressure test bench adjusts the nitrogen gas source pressure to the design pressure value through the pressure reducer and keeps the pressure constant. The pressure value is collected through the pressure transmitter, and the electronic control device 1 outputs a signal to open the solenoid valve 4. The constant pressure nitrogen enters the 50ml chamber 10 through the throttling element 8 and then enters the product test fixture 15 (titanium alloy diaphragm). When the pressure of the product test fixture reaches the set requirement, the electronic control device 1 closes the solenoid valve 4, opens the solenoid valve 2 5, and discharges the nitrogen in the product test fixture 15 through the throttling element 2 17. This is one cycle, and a total of 10,000 cycles are performed. The titanium alloy diaphragm is subjected to a forward and reverse air tightness test every 100 cycles. After 10,000 cycles, the surface dimensions and deformation of the titanium alloy diaphragm are tested. It is required that the surface dimensions and form and position tolerances of the titanium alloy diaphragm after the test do not exceed the limit tolerances of the design technical conditions. The electronic control device 1 sets the inflation and deflation time according to the design technical requirements, and the electronic control device 1 automatically records the number of inflation and deflation times of the test system.

[0028] Therefore, the present invention adopts the above-mentioned titanium alloy diaphragm fatigue test system, which greatly shortens the test time and diaphragm production cycle and reduces the test cost.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solutions of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A titanium alloy diaphragm fatigue test system, characterized by: It includes an electronic control device, which is provided with a power inlet and a signal outlet. The power inlet is connected to a DC power supply, and the signal outlet is connected to solenoid valve 1 and solenoid valve 2. One end of solenoid valve 1 is connected to pipe connector 1, and the other end of pipe connector 1 is connected to an air pressure test bench. The other end of solenoid valve 1 is connected to pipe connector 2, and the other end of pipe connector 2 is connected to throttling element 1.

2. The titanium alloy diaphragm fatigue testing system according to claim 1, characterized in that: The electronic control device includes a box body, a box cover, a solenoid valve control button 1, a solenoid valve control button 2, an electronic counter, a power cable and a signal cable. The box cover is set on the box body by fastening screws. The solenoid valve control button 1, the solenoid valve control button 2 and the electronic counter are all set on the box cover. The power cable is connected to the box body through the power inlet, and the signal cable is connected to the box body through the signal outlet.

3. The titanium alloy diaphragm fatigue testing system according to claim 1, characterized in that: The other end of the air pressure test bench is connected to an air source, the other end of the throttling element 1 is connected to a pipeline connector 3, the other end of the pipeline connector 3 is connected to a cavity, and the other end of the cavity is connected to the solenoid valve 2 through a pipeline connection assembly.

4. The titanium alloy diaphragm fatigue testing system according to claim 3, characterized in that: The pipeline connection assembly includes pipeline connection piece 4, pipeline connection piece 5 and pipeline connection piece 6. One end of pipeline connection piece 4 is connected to the cavity, and the other end of pipeline connection piece 4 is connected to pipeline connection piece 5 and pipeline connection piece 6.

5. The titanium alloy diaphragm fatigue testing system according to claim 4, characterized in that: The other end of the pipeline connector five is connected to the solenoid valve two, and the other end of the pipeline connector six is connected to a product testing tool.

6. The titanium alloy diaphragm fatigue testing system according to claim 5, characterized in that: A pipeline connector 7 is connected to the upper side of the solenoid valve 2, and the other end of the pipeline connector 7 is connected to the throttling element 2, and an exhaust port is provided above the throttling element 2.

7. The titanium alloy diaphragm fatigue testing system according to claim 3, characterized in that: The capacity of the chamber is set to 50 ml.

8. The titanium alloy diaphragm fatigue testing system according to claim 1, characterized in that: The DC power supply is a 27V DC power supply.

9. The titanium alloy diaphragm fatigue testing system according to claim 3, characterized in that: The gas source is a nitrogen bottle.

10. The titanium alloy diaphragm fatigue testing system according to claim 1, characterized in that: The air pressure test bench is provided with a pressure reducer and a pressure transmitter, and the pressure transmitter is provided at the rear end of the pressure reducer.

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