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

Abstract

The invention discloses a method and a tool for measuring the temperature sensing performance of a valve of an air-lubricating oil radiator. The tool comprises a shell, a first positioning block, a slotted cylindrical head screw and a second positioning block. The shell serves as a main body of the tool, the first positioning block and the second positioning block are assembled on the shell through the slotted cylindrical head screws, and the shell is provided with a plurality of observation windows and internal threads. The first positioning block is used for positioning the final position of the valve after the valve assembly is assembled, and the second positioning block is used for positioning the final position of the valve after the valve in the valve assembly moves. The valve assembly is assembled on the tool for a temperature sensing performance test, if the valve is opened or closed in advance, the memory alloy can be debugged through the adjusting gasket, it is guaranteed that the performance of the valve assembly is qualified, and the use requirement of the radiator is met.

Description

Technical Field

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

[0002] The air-oil radiator is used to cool the high-temperature oil from the oil system. The purpose of cooling the high-temperature oil is achieved through the 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 from the product oil inlet. At this time, the valve is opened, and the high-temperature oil enters the product core assembly through the valve bypass, exchanges heat with the low-temperature air, and then flows into the next stage from the oil outlet; when the system oil temperature is low, the valve is closed, and the oil flows directly from the outlet to the next stage.

[0003] like Figure 2 and Figure 6 , which shows a valve structure, such as Figure 6 As shown in the figure above, the memory alloy 5 and the shell are assembled and spun to form a whole. 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 finally 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 sensing valve). The difference between the two is Figure 2 The valve in is closed, that is, whether the memory alloy 5 is assembled in the housing. 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, the outer surface of the shell has a plurality of observation windows penetrating the thickness direction of the shell wall, the outer surface of the shell also has a mounting plane, and the inner surface of the shell has an internal thread;

[0008] A first positioning block, wherein the first positioning block is L-shaped, one side of which is provided with a waist-shaped through groove, the first positioning block is closely attached to the mounting plane of the shell through the side with the waist-shaped through groove, and the other side passes through the observation window and extends into the inner cavity of the shell;

[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, the outer surface of the shell is evenly distributed with four observation windows in the 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 installation plane of the shell by means of slotted cylindrical head screws passing through their own waist-shaped through slots.

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

[0013] Step 1, measuring 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, 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 where the first positioning block is close to the end face of the valve, and record it as the initial length L;

[0014] Step 2: Put the tooling with the valve assembly into a constant temperature circulation tank filled with lubricating oil, heat the lubricating oil to the valve action temperature T1°C, then the valve will move, and insert a feeler gauge of the same specification as in step 1 between the second positioning block and the end face of the housing that was originally in close contact, and the feeler gauge can pass smoothly;

[0015] Step 3, continue to heat the lubricating oil. When the lubricating oil temperature reaches T2°C, tighten the slotted cylindrical head screw on the first positioning block to fix the position of the first positioning block on the housing. Then measure the distance from the edge of the first positioning block close to the valve to the first axial end face of the housing, which is recorded 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, insert a feeler gauge of the same specification as in step 1 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 △L of the valve assembly, and determine whether △L 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 is opened or closed prematurely, an adjustment gasket is used to debug it 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 be used to test the temperature sensing performance of the air-oil radiator valve, and when the performance requirements are not met, the air-oil radiator valve can be easily adjusted. 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 on the tooling for measuring the temperature sensing performance of the air-oil radiator valve for debugging;

[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 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 in conjunction with the accompanying drawings and specific embodiments, but 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-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0029] like Figure 1 to Figure 5 As shown, the tooling 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 point and end point of the stroke corresponding to the memory alloy 5 on the valve assembly. The remaining one is used to install the first positioning block 2 and the second positioning block 4 and observe. The entire valve assembly is assembled at 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 4 The second positioning block 4 positions the starting position of the valve assembly after assembly, ensuring that the shell end surface where the memory alloy 5 in the valve assembly is located ( Figure 2 and Figure 6 The left end face of the middle shell) is tightly attached to the second positioning block 4. The second positioning block 4 is L-shaped, with a waist-shaped groove on one side, and is installed on the mounting plane of the shell 1 through a slotted cylindrical head screw 3 passing through the waist-shaped groove, and the other side is inserted into the inner cavity of the shell 1 and is parallel to the axial end face of the shell 1.

[0032] Slotted cylindrical head screw 3: Figure 1 and Figure 2 On the one hand, after the valve assembly is assembled in the inner cavity of the housing 1 of the tooling, 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 5 The first positioning block 2 positions the final position of the memory alloy 5 after deformation in the valve assembly, 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 tightly attached to the first positioning block 2. The first positioning block 2 is L-shaped, with a waist-shaped groove on one side, and is installed on the mounting plane of the housing 1 by a slotted cylindrical head screw 3 passing through the waist-shaped groove, and 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, it is possible to obtain information on whether the valve 7 is actuated, whether it is reset, and the extension amount of the valve assembly.

[0035] The steps for measuring the temperature sensing performance 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 time 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 in the housing 1 is in contact with the end face of the outer shell of the valve assembly ( Figure 7 Middle 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 detection. The 0.1mm feeler gauge 9 should not be able to pass; 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 put the tooling with the valve assembly into a constant temperature circulation tank filled with lubricating oil, and heat the lubricating oil to the operating temperature T1°C of the valve 7. At this time, the valve 7 is in motion, and 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 in normal motion.

[0038] Step 3: Continue to heat the lubricating oil. When the lubricating oil temperature reaches T2°C (T2>T1, corresponding to the valve 7 reaching the maximum opening), 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 close to the valve 7 to the first axial end face of the housing 1 (during the heating process, the first positioning block 2 moves with the valve 7), which is recorded 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, insert a 0.1mm feeler gauge 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 △L of the valve assembly, and determine whether △L 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 a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A tool for measuring the temperature sensing performance of the valve of an air-oil radiator, characterized in that: include: A shell (1), wherein the shell (1) is in the shape of a circular tube, the outer surface of the shell (1) is provided with a plurality of observation windows penetrating the wall thickness direction of the shell (1), the outer surface of the shell (1) is also provided with a mounting plane, and the inner surface of the shell (1) is provided with 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 groove, the first positioning block (2) is closely attached to the mounting plane of the shell (1) through the side with the waist-shaped through groove, and the other side passes through the observation window and extends into the inner cavity of the shell (1); The second positioning block (4) is L-shaped, one side of which is provided with a waist-shaped through groove, the second positioning block (4) is tightly attached to the mounting plane of the shell (1) 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 (1) so as to be opposite to the side of the first positioning block (1) extending into the inner cavity of the shell (1).

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

3. The tool for measuring the temperature sensing performance of the air-oil radiator valve according to claim 1 is characterized in that: The first positioning block (2) and the second positioning block (4) are both connected to the installation plane of the housing (1) via slotted cylindrical head screws (3) passing through their waist-shaped through slots.

4. A method for measuring the temperature sensing performance of an air-oil radiator valve, characterized in that: The tooling according to claim 3 is used, and includes the following steps: Step 1, measuring 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 in close contact with 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 of the second positioning block (4) in close contact, if the feeler gauge (9) cannot pass through, tighten the slotted cylindrical head screw ( 3) Fix the positions 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) leftward and rightward along the installation plane of the housing (1) so that the side 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 side 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 in a constant temperature circulation tank filled with lubricating oil, heat the lubricating oil to the operating temperature T1°C of the valve (7), then the valve (7) is actuated, and a feeler gauge (9) of the same specification as in step 1 is inserted between the second positioning block (4) and the end surface of the housing that was originally in close contact, and the feeler gauge (9) can pass smoothly; Step 3, continue to heat 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) 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 specification 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 △L of the valve assembly, and determine whether △L meets the design elongation requirement of the valve assembly.

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