Method and tool for measuring temperature sensing performance of air-oil radiator valve

Abstract

The present invention discloses a method and tool for measuring the temperature sensing performance of an air-oil radiator valve, wherein the tool comprises a shell, a first positioning block, a slotted cylindrical head screw, and a second positioning block. The shell serves as the main body of the tool, and the first positioning block and the second positioning block are assembled on the shell by means of slotted cylindrical head screws. The shell has a plurality of observation windows and internal threads. The first positioning block locates the terminal position of the valve after the valve assembly is assembled, and the second positioning block locates the terminal position of the valve in the valve assembly after movement. The valve assembly is assembled on the tool of the present invention to conduct a temperature sensing performance test. If the valve opens or closes prematurely, an adjustment gasket can be used to debug the memory alloy to ensure that the performance of the valve assembly is qualified and meets the use requirements of the radiator.

Description

Technical Field

[0001] The invention relates to a temperature sensing performance test method of a valve and a tool for performing the temperature sensing performance test after the valve is assembled. Background Art

[0002] The air-oil radiator cools the high-temperature oil from the oil system. This cooling is achieved through heat exchange between the low-temperature air and the high-temperature oil in the product core assembly. When the system oil temperature is high, the high-temperature oil enters the inner cavity through the product oil inlet. At this time, the valve opens, allowing the high-temperature oil to bypass the valve and enter the product core assembly, exchanging heat with the low-temperature air before flowing through the oil outlet to the next stage. When the system oil temperature is low, the valve closes, allowing the oil to flow directly from the outlet to the next stage.

[0003] like Figure 2 and Figure 6 , which shows a valve structure, e.g. Figure 6 As shown in the figure above, the memory alloy 5 and the shell are assembled and spun to form a whole, as shown in the figure above. Figure 6 As shown in the figure below, the memory alloy 5 is integrated with the shell and then assembled with the valve 7, spring 6, nut 8, gasket, retaining ring and other parts to form the entire valve assembly. The structure and working principle of the valve can be referred to the Chinese utility model patent (CN212900051U, 2021.04.06, a kind of open temperature and pressure sensitive valve). The difference between the two is Figure 2 The valve is closed, that is, whether the memory alloy 5 is assembled in the shell. In order to ensure that the temperature sensing performance of the valve opening and closing meets the use requirements, debugging and verification are required. Therefore, it is necessary to design a set of tooling to test and debug the temperature sensing performance of the valve assembly. Summary of the Invention

[0004] In response to the problems existing in the background technology, the present invention aims to provide a method and tooling for measuring the temperature sensing performance of the air-oil radiator valve. The valve assembly is assembled on the tooling for a temperature sensing performance test. If the valve is opened or closed prematurely, it can be debugged subsequently using an adjusting gasket to ensure that the temperature sensing performance of the valve is qualified and meets the use requirements of the air-oil radiator.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The tool for measuring the temperature sensing performance of the air-oil radiator valve includes:

[0007] The shell is in the shape of a circular tube, and has a plurality of observation windows extending through the thickness of the shell wall on its outer surface, a mounting plane on its outer surface, and an internal thread on its inner surface;

[0008] a first positioning block, wherein the first positioning block is L-shaped, one side of which is provided with a waist-shaped through-slot, the first positioning block being closely attached to the mounting plane of the housing through the side with the waist-shaped through-slot, and the other side extending through the observation window into the inner cavity of the housing;

[0009] The second positioning block is L-shaped, with a waist-shaped through groove on one side. The second positioning block is tightly attached to the mounting plane of the shell through the side with the waist-shaped through groove, and the other side extends through the observation window into the inner cavity of the shell, thereby being opposite to the side of the first positioning block extending into the inner cavity of the shell.

[0010] Furthermore, four observation windows are evenly distributed on the outer surface of the shell in a circumferential direction, and the four observation windows all extend along the axial direction of the shell.

[0011] Furthermore, the first positioning block and the second positioning block are both connected to the mounting plane of the housing by slotted cylindrical head screws passing through their own waist-shaped through slots.

[0012] The method for measuring the temperature sensing performance of an air-oil radiator valve uses the aforementioned fixture with a slotted cylindrical head screw and includes the following steps:

[0013] Step 1, measure the initial length L of the valve assembly at room temperature: install one end of the valve assembly with the valve into the shell and tighten it through the internal thread of the shell, slide the second positioning block left and right along the installation plane of the shell so that the side of the second positioning block located in the shell is close to the end face of the shell corresponding to the memory alloy, use a feeler gauge to check the gap between the end face of the shell and the side that the second positioning block is close to, if the feeler gauge cannot pass, tighten the slotted cylindrical head screw to fix the position of the second positioning block and the valve assembly in the shell, screw the slotted cylindrical head screw so that the first positioning block can only slide along the installation plane of the shell, and then slide the first positioning block left and right along the installation plane of the shell so that the side of the first positioning block located in the shell is close to the end face of the valve, at this time, measure the distance from the axial first end face of the shell to the side that the first positioning block is close to the end face of the valve, and record it as the initial length L;

[0014] Step 2: Place the tooling with the valve assembly into a constant temperature circulation tank filled with lubricating oil. Heat the lubricating oil to the valve's operating temperature of T1°C. At this point, the valve will actuate. Use a feeler gauge of the same specifications as in step 1 to insert it between the second positioning block and the end face of the housing that was originally in close contact. The feeler gauge should pass smoothly.

[0015] Step 3: Continue heating the lubricating oil. When the lubricating oil temperature reaches T2°C, tighten the slotted cylindrical head screw on the first positioning block to secure the first positioning block in place on the housing. Then, measure the distance from the edge of the first positioning block that abuts the valve to the first axial end face of the housing, marking this as L1.

[0016] Step 4: Turn off the heating function of the constant temperature circulation tank. When the temperature of the lubricating oil is lower than the operating temperature T1°C of the valve, use a feeler gauge of the same specifications as in step 1 to insert into the gap between the second positioning block and the housing. The feeler gauge cannot pass through.

[0017] Step 5: Subtract L from L1 to obtain the elongation ΔL of the valve assembly, and determine whether ΔL meets the design elongation requirement of the valve assembly.

[0018] Compared with the prior art, the present invention installs the assembled valve assembly on a tooling to conduct a temperature sensing performance test. If the valve opens or closes prematurely, it is debugged using an adjustment gasket to ensure qualified performance and ensure that after the valve assembly is assembled on the air-oil radiator, it can meet the heat dissipation requirements of the air-oil radiator in the aircraft environmental control system.

[0019] Compared with the prior art, the tooling of the present invention can perform temperature sensing performance tests on the air-oil radiator valve, and can facilitate adjustment of the air-oil radiator valve when the performance requirements are not met. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the tooling for measuring the temperature sensing performance of the air-oil radiator valve;

[0021] Figure 2 A simplified diagram of the valve assembly being installed and debugged on a tool for measuring the temperature sensing performance of the air-oil radiator valve;

[0022] Figure 3 It is a schematic diagram of the shell;

[0023] Figure 4 This is a schematic diagram of the first positioning block;

[0024] Figure 5 This is a schematic diagram of the second positioning block;

[0025] Figure 6 It is a structural diagram of the valve assembly;

[0026] Figure 7 This is the principle diagram for measuring the temperature sensing performance of the valve;

[0027] In the figure, 1-housing; 2-first positioning block; 3-slotted cylindrical head screw; 4-second positioning block; 5-memory alloy; 6-spring; 7-valve; 8-nut; 9-feeler gauge. DETAILED DESCRIPTION

[0028] The present invention is further described below with reference to the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various modifications, substitutions and changes made according to common technical knowledge and customary means in the field are included in the scope of the present invention.

[0029] like Figures 1 to 5 As shown, the tool for measuring the temperature sensing performance of the air-oil radiator valve includes a housing 1, a first positioning block 2, a slotted cylindrical head screw 3, and a second positioning block 4. The functions of each component are as follows:

[0030] Shell 1: As Figure 3 The shell 1 is the main body of the tooling, specifically a steel pipe with a circular cross-section. The other components are assembled on the shell 1. The shell 1 has 4 observation windows and M30 internal threads. Three of the observation windows are used to observe the starting and ending points of the stroke corresponding to the memory alloy 5 on the valve assembly. The remaining 1 is used to install the first positioning block 2 and the second positioning block 4 and observe them. The entire valve assembly is assembled on the M30 internal thread of the shell 1 in the tooling through its own external thread. There is a mounting plane on the outer surface of the shell 1, see Figure 3 Lower end face of the middle AA section.

[0031] Second positioning block 4: Figure 5 The second positioning block 4 positions the starting position of the valve assembly after assembly, ensuring that the end surface of the housing where the memory alloy 5 is located in the valve assembly ( Figure 2 and Figure 6 The left end face of the middle housing) is in close contact with the second positioning block 4. The second positioning block 4 is L-shaped, with a waist-shaped groove on one side. It is mounted on the mounting surface of the housing 1 using a slotted cylindrical head screw 3 that passes through the waist-shaped groove. The other side is inserted into the inner cavity of the housing 1 and is parallel to the axial end face of the housing 1.

[0032] Slotted cylindrical head screw 3: as Figure 1 and Figure 2 On the one hand, after the valve assembly is assembled in the inner cavity of the tooling housing 1, the second positioning block 4 is tightened and fixed with a slotted cylindrical head screw 3 to prevent the second positioning block 4 and the valve assembly from moving. On the other hand, it is used to install the first positioning block 2 and the second positioning block 4 on the mounting plane of the housing 1.

[0033] First positioning block 2: Figure 4 The first positioning block 2 positions the end position of the memory alloy 5 in the valve assembly after deformation, ensuring that the end surface of the valve 7 in the valve assembly ( Figure 2 and Figure 6The right end face of the middle valve 7 is in close contact with the first positioning block 2. The first positioning block 2 is L-shaped, with a waist-shaped groove on one side. It is mounted on the mounting surface of the housing 1 using a slotted cylindrical head screw 3 that passes through the waist-shaped groove. The other side is inserted into the inner cavity of the housing 1 and is parallel to the axial end face of the housing 1.

[0034] In the present invention, when Figure 7 When the valve assembly and the tooling are heated together, the memory alloy 5 expands and generates thrust in the left and right directions. Figure 1 In the cavity of the tooling for measuring the temperature sensing performance of the air-oil radiator valve shown in the figure, the left end of the valve assembly is fixed and cannot move, and the right end is a suspended free end. The thrust causes the valve 7 at the right end to move to the right, which is manifested as the extension of the valve assembly. Therefore, by measuring the gap between the second positioning block 4 and the outer shell and the distance from the first positioning block 2 to the same axial end face of the shell 1, information on whether the valve 7 is actuated, whether it is reset, and the extension amount of the valve assembly can be obtained.

[0035] The steps for measuring the temperature sensing performance of the air-oil radiator valve using the tool for measuring the temperature sensing performance of the air-oil radiator valve are as follows:

[0036] The first step is to loosen the slotted cylindrical head screws 3 corresponding to the first positioning block 2 and the second positioning block 4 so that the first positioning block 2 and the second positioning block 4 are in a relaxed state; Figure 2 and Figure 7 , screw the assembled valve assembly into the tooling using the external threads on the surface and the internal threads of the housing 1 (screw it to the bottom through the internal threads of the housing 1, at which point the annular raised surface on the valve assembly is in close contact with the axial end face of the housing 1), adjust the position of the second positioning block 4 so that the end face of the side of the second positioning block 4 located inside the housing 1 is in contact with the end face of the outer shell of the valve assembly ( Figure 7 Position B), tighten the slotted cylindrical head screw 3 corresponding to the second positioning block 4, and use a 0.1mm feeler gauge 9 to gently insert it between the second positioning block 4 and the shell along the side of the second positioning block 4 located inside the shell 1 for testing. The 0.1mm feeler gauge 9 should not pass through; screw the slotted cylindrical head screw 3 corresponding to the first positioning block 2, and after confirming that the first positioning block 2 can only slide flexibly left and right on the installation plane of the shell 1, adjust the position of the first positioning block 2 so that the end face of the side of the first positioning block 2 located inside the shell 1 contacts the end face of the valve 7 ( Figure 7 In the middle position A), measure the distance from the end face of the first positioning block 2 close to the valve 7 to the axial end face of the housing 1 and record it as L;

[0037] The second step is to place the tooling with the valve assembly into a constant temperature circulation tank filled with lubricating oil. The lubricating oil is heated to the operating temperature T1°C of the valve 7. At this time, the valve 7 is actuated. A 0.1mm feeler gauge 9 is inserted between the second positioning block 4 and the end surface of the housing that was originally in close contact. If the feeler gauge 9 can pass smoothly, the valve 7 is actuated normally.

[0038] Step 3: Continue heating the lubricating oil. When the lubricating oil temperature reaches T2°C (T2>T1, corresponding to the maximum opening of valve 7), tighten the slotted cylindrical head screw 3 on the first positioning block 2 to secure the first positioning block 2 on the housing 1. Then, measure the distance from the edge of the first positioning block 2 that abuts the valve 7 to the first axial end face of the housing 1 (the first positioning block 2 moves with the valve 7 during the heating process), and record it as L1.

[0039] Step 4: Turn off the heating function of the constant temperature circulation tank. When the temperature of the lubricating oil is lower than the operating temperature T1°C of the valve, use a 0.1mm feeler gauge to insert into the gap between the second positioning block 4 and the housing. If the feeler gauge cannot pass through, it proves that the valve 7 is successfully reset.

[0040] Step 5: Subtract L from L1 to obtain the elongation ΔL of the valve assembly, and determine whether ΔL meets the design elongation requirement of the valve assembly;

[0041] Step 6: If the elongation does not meet the design requirements, a gasket coaxial with the memory alloy 5 is installed in the valve assembly.

[0042] After completing the measurement process, the valve assembly will be removed from the tooling, the surface will be cleaned, and it will be inspected and archived together with the test parameter records and verification results.

[0043] The above is only one specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A method for measuring the temperature sensing performance of an air-oil radiator valve, characterized in that: The tooling used includes: The shell (1) is in the shape of a circular tube, and the outer surface of the shell (1) is provided with a plurality of observation windows penetrating the thickness direction of the shell (1). The outer surface of the shell (1) also has a mounting plane, and the inner surface of the shell (1) has an internal thread; A first positioning block (2), the first positioning block (2) is L-shaped, one side of which is provided with a waist-shaped through-slot, the first positioning block (2) is tightly attached to the mounting plane of the shell (1) through the side with the waist-shaped through-slot, and the other side extends through the observation window into the inner cavity of the shell (1); a second positioning block (4), the second positioning block (4) being L-shaped, with a waist-shaped through-slot formed on one side thereof, the second positioning block (4) being closely attached to the mounting plane of the shell (1) via the side with the waist-shaped through-slot, and the other side extending through the observation window into the inner cavity of the shell (1) so as to be opposite to the side of the first positioning block (2) extending into the inner cavity of the shell (1); The first positioning block (2) and the second positioning block (4) are both connected to the mounting plane of the housing (1) via slotted cylindrical head screws (3) passing through their waist-shaped through slots; The method for measuring the temperature sensing performance of the air-oil radiator valve includes the following steps: Step 1: Measure the initial length L of the valve assembly at room temperature: Install one end of the valve assembly with the valve (7) into the housing (1) and tighten it through the internal thread of the housing (1). Slide the second positioning block (4) left and right along the installation plane of the housing (1) so that the side of the second positioning block (4) located in the housing (1) is close to the end face of the housing corresponding to the memory alloy (5). Use a feeler gauge (9) to check the gap between the end face of the housing and the side that the second positioning block (4) is close to. If the feeler gauge (9) cannot pass through, tighten the slotted cylindrical head screw ( 3) Fix the position of the second positioning block (4) and the valve assembly in the housing (1), screw the slotted cylindrical head screw (3) so that the first positioning block (2) can only slide along the installation plane of the housing (1), and then slide the first positioning block (2) left and right along the installation plane of the housing (1) so that the edge of the first positioning block (2) located in the housing (1) is in close contact with the end face of the valve (7). At this time, measure the distance from the axial first end face of the housing (1) to the edge of the first positioning block (2) in close contact with the end face of the valve (7), and record it as the initial length L; Step 2: Place the tooling with the valve assembly into a constant temperature circulation tank filled with lubricating oil, heat the lubricating oil to the operating temperature T1°C of the valve (7), and then the valve (7) will be actuated. Insert a feeler gauge (9) of the same specifications as in step 1 between the second positioning block (4) and the end face of the housing that was originally in close contact, and the feeler gauge (9) can pass smoothly. Step 3: Continue heating the lubricating oil. When the lubricating oil temperature reaches T2°C, tighten the slotted cylindrical head screw (3) on the first positioning block (2) to fix the position of the first positioning block (2) on the housing (1). Then measure the distance from the edge of the first positioning block (2) that is close to the valve (7) to the first axial end face of the housing (1), which is recorded as L1. Step 4: Turn off the heating function of the constant temperature circulation tank. When the temperature of the lubricating oil is lower than the operating temperature T1°C of the valve (7), insert a feeler gauge (9) of the same specifications as in step 1 into the gap between the second positioning block (4) and the housing. The feeler gauge (9) cannot pass through. Step 5: Subtract L from L1 to obtain the elongation ΔL of the valve assembly, and determine whether ΔL meets the design elongation requirement of the valve assembly.

2. The method for measuring the temperature sensing performance of an air-oil radiator valve according to claim 1, characterized in that: Four observation windows are evenly distributed in the circumferential direction on the outer surface of the shell (1), and the four observation windows all extend along the axial direction of the shell (1).

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