Automatic alignment clamping device for cold path pressure drop test of aircraft heat exchanger

Abstract

The utility model discloses an automatic alignment clamping device for a cold path pressure drop test of an aircraft heat exchanger, which comprises an alignment trolley and a fixed alignment frame, a heat exchanger parking vacancy is arranged on the alignment trolley, the side edge and the rear edge of the heat exchanger parking vacancy are both provided with limiting structures, a first alignment structure is arranged in front of the alignment trolley, and a second alignment structure is arranged in back of the alignment trolley. A mounting vacancy is arranged in the fixed alignment frame, a cold path pressure drop testing tool for testing is fixedly mounted in the mounting vacancy, clamping mechanisms are arranged on the two side edges of the mounting vacancy respectively, and a second alignment structure is arranged in front of the fixed alignment frame; during testing, after the first alignment structure and the second alignment structure are in butt joint, the cold path end of the aircraft heat exchanger and the matching end of the cold path pressure drop testing tool are aligned and attached together, and at the moment, the flange edge of the cold path end can be tightly pressed on the flange edge of the matching end through the clamping mechanism. According to the utility model, rapid alignment and clamping of the airplane heat exchanger and the cold path pressure drop test tool can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft heat exchanger cold circuit pressure drop testing, in particular to an automatic alignment clamping device for aircraft heat exchanger cold circuit pressure drop testing. Background Art

[0002] When repairing an aircraft heat exchanger, a cold circuit pressure drop test of the aircraft heat exchanger is essential as a means to determine the blockage condition of the aircraft heat exchanger core. During the cold circuit pressure drop test, due to a certain height difference between the cold circuit end of the aircraft heat exchanger and the matching end of the cold circuit pressure drop test fixture and the need for clamping after alignment, the traditional method is: first place the aircraft heat exchanger on a lifting trolley, then tie the aircraft heat exchanger to the lifting trolley with a strap, then adjust the height of the lifting trolley to adjust the aircraft heat exchanger to the same height as the matching end of the cold circuit pressure drop test fixture, and finally use general tools such as pliers to clamp the aircraft heat exchanger on the cold circuit pressure drop test fixture.

[0003] However, this traditional method not only requires considerable time and effort to secure the aircraft heat exchanger and adjust the position of the lifting trolley, resulting in low efficiency, but also involves the tedious task of securing the aircraft heat exchanger with straps, which can easily lead to the risk of missing a strap. Furthermore, the relevant maintenance manuals lack specific alignment and clamping methods. Therefore, a dedicated automated alignment and clamping device tailored to the specific requirements of cold circuit pressure drop testing on aircraft heat exchangers must be designed to simplify operation and improve efficiency. Utility Model Content

[0004] The utility model aims to provide an automatic alignment and clamping device for a cold circuit pressure drop test of an aircraft heat exchanger, which can realize rapid alignment and clamping of an aircraft heat exchanger and a cold circuit pressure drop test tool.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] An automatic alignment clamping device for testing the cold circuit pressure drop of an aircraft heat exchanger is characterized in that it includes an alignment trolley and a fixed alignment frame. A heat exchanger parking space is provided on the alignment trolley. The side and rear of the heat exchanger parking space are provided with a limiting structure for limiting the position of the aircraft heat exchanger. During the test, the aircraft heat exchanger will be placed in the heat exchanger parking space, but the cold circuit end of the aircraft heat exchanger is located in front of the alignment trolley. A first alignment structure is provided in front of the alignment trolley, and an installation space is provided in the fixed alignment frame. The heat exchanger parking space is provided at the front of the alignment trolley. The bottom surface is at the same horizontal height as the bottom surface of the installation space. The cold circuit pressure drop test tool used for testing will be fixedly installed in the installation space and the matching end of the cold circuit pressure drop test tool is located in front of the fixed alignment frame. Clamping mechanisms are respectively provided on both sides of the installation space, and a second alignment structure is provided in front of the fixed alignment frame. During the test, when the first alignment structure is docked with the second alignment structure, the cold circuit end of the aircraft heat exchanger and the matching end of the cold circuit pressure drop test tool will be aligned and fitted together. At this time, the flange edge of the cold circuit end can be pressed against the flange edge of the matching end through the clamping mechanism.

[0007] A further technical solution of the utility model is: the clamping mechanism includes a chuck, a linear telescopic mechanism and a support seat, the support seat is fixedly installed on the side of the installation space, the middle part of the chuck is rotatably connected to the support seat and is located in front of the installation space, the linear telescopic mechanism is installed on the support seat, the telescopic end of the linear telescopic mechanism is hinged to the end of the chuck away from the installation space, and the end of the chuck close to the installation space is provided with an extended pressing part, which is used to press on the flange edge on the cold circuit end.

[0008] A further technical solution of the present invention is that a protruding connecting portion is provided in the middle of the chuck, and the connecting portion is rotatably connected to the supporting seat through a vertical first pin shaft.

[0009] A further technical solution of the utility model is: the linear telescopic mechanism is a cylinder, the tail of the cylinder is rotatably connected to the support seat through a vertical second pin shaft, and the front end of the cylinder piston rod is hinged to the end of the chuck away from the installation space.

[0010] A further technical solution of the utility model is: the first alignment structure includes two alignment plates arranged opposite to each other on the left and right, and the second alignment structure includes two alignment rods arranged opposite to each other on the left and right. During alignment, the front ends of the two alignment rods will be inserted between the two alignment plates, and the outer side surfaces of the alignment rods will fit with the inner side surfaces of the alignment plates.

[0011] A further technical solution of the utility model is that the front end of the alignment plate is bent toward the outer side.

[0012] A further technical solution of the present invention is: the limiting structure includes limiting plates arranged on both sides of the heat exchanger parking space and a limiting rod group arranged behind the heat exchanger parking space, and the limiting plates and the limiting rod group are both vertically fixed on the positioning trolley.

[0013] A further technical solution of the present invention is that the limiting rod group comprises two limiting rods, and the two limiting rods are arranged opposite to each other on the left and right sides.

[0014] A further technical solution of the present invention is that the bottom surface of the heat exchanger parking space and the bottom surface of the installation space are respectively provided with a first bottom plate and a second bottom plate, and the first bottom plate and the second bottom plate are located at the same horizontal height.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The utility model realizes the rapid and accurate docking of the cold circuit end of the aircraft heat exchanger and the matching end of the cold circuit pressure drop test tool by the coordinated docking of the alignment trolley and the fixed alignment frame. After docking, the flange edge on the cold circuit end is pressed against the flange edge on the matching end by the clamping mechanism, thereby realizing rapid clamping, improving the safety and reliability of the cold circuit pressure drop test of the aircraft heat exchanger and improving the maintenance work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional schematic diagram of the alignment trolley according to an embodiment of the present utility model;

[0018] Figure 2 This is a three-dimensional schematic diagram of a fixed alignment frame according to an embodiment of the present utility model;

[0019] Figure 3 It is a three-dimensional schematic diagram of the clamping mechanism of an embodiment of the utility model;

[0020] Figure 4 This is a structural diagram of the first alignment structure and the second alignment structure of the embodiment of the utility model when they are docked;

[0021] Figure 5 This is a schematic diagram of the structure when the matching end of the cold circuit pressure drop test fixture is connected to the cold circuit end of the aircraft heat exchanger.

[0022] Meaning of the reference numerals in the figure:

[0023] 1-alignment trolley; 2-alignment plate; 3-parking space for heat exchanger; 4-limiting plate; 5-first base plate; 6-limiting rod; 7-trolley handle; 8-universal caster; 9-clamping mechanism; 10-installation space; 11-fixed alignment frame; 12-alignment rod; 13-second base plate; 14-support seat; 15-cylinder; 15.1-piston rod; 16-chuck; 16.1-pressing part; 16.2-connecting part; 17-first pin; 18-second pin; 19-matching end of cold circuit pressure drop test fixture; 19.1-flange edge of matching end; 20-cold circuit end of aircraft heat exchanger; 20.1-flange edge of cold circuit end; 21-pressure regulating valve. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the embodiments.

[0025] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0026] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0027] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0028] Example:

[0029] like Figures 1 to 3 The figure shows an automatic alignment clamping device for the cold circuit pressure drop test of an aircraft heat exchanger according to this embodiment, which includes an alignment trolley 1 and a fixed alignment frame 11 .

[0030] like Figure 1As shown, the underframe of the alignment trolley 1 is constructed from aluminum profiles, which reduces the weight of the trolley 1 while ensuring safe loading of the aircraft heat exchanger. The rear of the trolley 1 is equipped with a trolley handle 7, and the bottom is equipped with four 3-inch universal casters 8 with brakes. A heat exchanger parking space 3 is located above the trolley 1, which is used to park the aircraft heat exchanger. The bottom surface of the heat exchanger parking space 3 is provided with a first base plate 5, and the sides and rear are provided with limiting structures for limiting the position of the aircraft heat exchanger. The limiting structure of this embodiment includes limiting plates 4 located on both sides of the heat exchanger parking space 3 and a limiting rod assembly located at the rear of the heat exchanger parking space 3. The limiting plates 4 and the limiting rod assembly are both vertically fixed to the top of the alignment trolley 1. The limiting rod assembly includes two limiting rods 6, which are arranged opposite each other on the left and right sides. During testing, the aircraft heat exchanger will be placed in the heat exchanger parking space 3, with the limit rod 6 abutting against the rear of the aircraft heat exchanger and the limit plate 4 abutting against both sides of the aircraft heat exchanger. However, the cold circuit end 20 of the aircraft heat exchanger will protrude in front of the alignment trolley 1 for docking with the matching end 19 of the cold circuit pressure drop test fixture.

[0031] The limiting rod 6 and the limiting plate 4 of this embodiment are both made of Teflon material, ensuring that the aircraft heat exchanger will not be damaged during the test process.

[0032] Among them, a first alignment structure is provided in front of the alignment trolley, and the first alignment structure includes two alignment plates 2 arranged opposite to each other on the left and right. The alignment plates 2 are stainless steel plates. The two alignment plates 2 are both located near the bottom of the alignment trolley 1. The front ends of the alignment plates 2 are bent toward the outer sides, so that the front ends of the two alignment plates 2 are in an outwardly opened shape.

[0033] like Figure 2 As shown, the fixed alignment frame 11 is made of aluminum profiles, and an installation space 10 is provided in the fixed alignment frame 11. The bottom surface of the installation space 10 is provided with a second base plate 13. The first base plate 5 and the second base plate 13 are located at the same horizontal height. The cold circuit pressure drop test fixture for testing will be fixedly installed in the installation space 10, and the matching end 19 of the cold circuit pressure drop test fixture will be located in front of the fixed alignment frame 11 for docking with the cold circuit end 20 of the aircraft heat exchanger.

[0034] The two sides of the installation space 10 are respectively provided with clamping mechanisms 9, and the clamping mechanisms 9 are arranged in pairs. In this embodiment, two pairs of clamping mechanisms 9 are provided, and the clamping mechanisms 9 in each pair are arranged symmetrically. Figure 3 As shown, the clamping mechanism 9 of this embodiment includes a clamping head 16, a linear telescopic mechanism and a support seat 14, wherein the linear telescopic mechanism is a cylinder 15, and a pressure regulating valve 21 for controlling the cylinder 15 is installed on the top of the fixed positioning frame 11. By operating the pressure regulating valve 21, the extension and retraction of the cylinder 15 can be controlled.

[0035] The support base 14 is fixedly mounted on the side of the mounting space 10, and the chuck 16 is located in front of the mounting space 10. A protruding connecting portion 16.2 is provided in the middle of the chuck 16. This connecting portion 16.2 is rotatably connected to the support base 14 via a vertical first pin 17. The tail of the cylinder 15 is rotatably connected to the support base 14 via a vertical second pin 18. The front end of the piston rod 15.1 of the cylinder 15 is hinged to the end of the chuck 16 away from the mounting space 10. The end of the chuck 16 near the mounting space 10 is provided with an extended pressing portion 16.1. The pressing portion 16.1 is curved outward and is used to press against the flange edge 20.1 of the cold circuit end.

[0036] A second alignment structure is provided in front of the fixed alignment frame 11. The second alignment structure includes two alignment rods 12 arranged opposite to each other on the left and right. The alignment rods 12 are located near the bottom of the fixed alignment frame 11. The alignment rods 12 and the alignment plate 2 are at the same level. The distance between the outer sides of the two alignment rods 12 is equal to the distance between the inner sides of the two alignment plates 2. Figure 4 As shown, during alignment, the front ends of the two alignment rods 12 will be inserted between the two alignment plates 2, and the outer side surfaces of the alignment rods 12 will fit with the inner side surfaces of the alignment plates 2.

[0037] The use process of the automatic alignment clamping device of this embodiment is as follows:

[0038] 1. First, place the aircraft heat exchanger in the heat exchanger parking space 3 of the alignment trolley 1. At this time, the two side surfaces of the aircraft heat exchanger are in contact with the alignment plate 4, and the rear of the aircraft heat exchanger is against the alignment rod 6. The aircraft heat exchanger is firmly fixed on the alignment trolley 1. The cold circuit end 20 of the aircraft heat exchanger is located in front of the alignment trolley 1 and needs to be connected with the matching end 19 of the cold circuit pressure drop test fixture. The cold circuit end 20 of the aircraft heat exchanger and the matching end 19 of the cold circuit pressure drop test fixture are exactly at the same level.

[0039] 2. Push the alignment trolley 1 together with the aircraft heat exchanger to the front of the fixed alignment frame 11, align the alignment plate 2 with the outer side of the alignment rod 12, and then push the alignment trolley 1 toward the fixed alignment frame 11. The front ends of the two alignment rods 12 will be inserted between the two alignment plates 2. Finally, the cold circuit end 20 of the aircraft heat exchanger and the mating end 19 of the cold circuit pressure drop test fixture are aligned and fit together. The flange edge 20.1 of the cold circuit end is aligned and fits together with the flange edge 19.1 of the mating end.

[0040] 3. After confirming that the cold circuit end 20 of the aircraft heat exchanger is correctly connected to the mating end 19 of the cold circuit pressure drop test fixture, operate the pressure regulating valve 21 to extend the piston rod 15.1 of the cylinder 15 forward, driving the chuck 16 to rotate. The pressing portion 16.1 of the chuck 16 presses against the flange edge 20.1 of the cold circuit end. The flange edge 20.1 of the cold circuit end is then tightly pressed against the flange edge 19.1 of the mating end, completing the clamping. After this, the cold circuit pressure drop test of the aircraft heat exchanger can be performed.

[0041] 4. After the test is completed, the pressure regulating valve 21 is operated again to retract the piston rod 15.1 of the cylinder 15, driving the chuck 16 to rotate. The pressing portion 16.1 of the chuck 16 releases the flange edge 20.1 at the cold circuit end and rotates to the side so as not to hinder the withdrawal of the aircraft heat exchanger. The alignment trolley 1 is then pushed out and the aircraft heat exchanger is removed, completing the aircraft heat exchanger cold circuit pressure drop test.

[0042] The above embodiments of the present invention are not intended to limit the scope of protection of the present invention, and the implementation methods of the present invention are not limited thereto. All other modifications, replacements or changes made to the above structure of the present invention based on the above contents of the present invention, in accordance with common technical knowledge and customary means in this field, without departing from the above basic technical ideas of the present invention, should fall within the scope of protection of the present invention.

Claims

1. An automatic alignment clamping device for testing the cold circuit pressure drop of an aircraft heat exchanger, characterized by: It includes an alignment trolley and a fixed alignment frame. A heat exchanger parking space is provided on the alignment trolley. The side and rear of the heat exchanger parking space are provided with a limiting structure for limiting the position of the aircraft heat exchanger. During the test, the aircraft heat exchanger will be placed in the heat exchanger parking space, but the cold circuit end of the aircraft heat exchanger is located in front of the alignment trolley. A first alignment structure is provided in front of the alignment trolley, and an installation space is provided in the fixed alignment frame. The bottom surface of the heat exchanger parking space and the bottom surface of the installation space are at the same horizontal height. The cold circuit pressure drop test tool for trial use will be fixedly installed in the installation space and the matching end of the cold circuit pressure drop test tool will be located in front of the fixed alignment frame. Clamping mechanisms are respectively provided on both sides of the installation space, and a second alignment structure is provided in front of the fixed alignment frame. During the test, when the first alignment structure is docked with the second alignment structure, the cold circuit end of the aircraft heat exchanger and the matching end of the cold circuit pressure drop test tool will be aligned and fitted together. At this time, the flange edge of the cold circuit end can be pressed against the flange edge of the matching end through the clamping mechanism.

2. The automatic alignment clamping device for aircraft heat exchanger cold circuit pressure drop testing according to claim 1, characterized in that: The clamping mechanism includes a chuck, a linear telescopic mechanism and a support seat, the support seat is fixedly installed on the side of the installation space, the middle part of the chuck is rotatably connected to the support seat and is located in front of the installation space, the linear telescopic mechanism is installed on the support seat, the telescopic end of the linear telescopic mechanism is hinged to the end of the chuck away from the installation space, and the end of the chuck close to the installation space is provided with an extended pressing part, and the pressing part is used to press on the flange edge on the cold circuit end.

3. The automatic alignment clamping device for aircraft heat exchanger cold circuit pressure drop testing according to claim 2, characterized in that: A protruding connecting portion is provided in the middle of the chuck, and the connecting portion is rotatably connected to the supporting seat via a vertical first pin shaft.

4. The automatic alignment clamping device for aircraft heat exchanger cold circuit pressure drop testing according to claim 2, characterized in that: The linear telescopic mechanism is a cylinder, the tail of the cylinder is rotatably connected to the support seat through a vertical second pin shaft, and the front end of the piston rod of the cylinder is hinged to the end of the chuck away from the installation space.

5. The automatic alignment clamping device for aircraft heat exchanger cold circuit pressure drop testing according to claim 1, characterized in that: The first alignment structure includes two alignment plates arranged opposite to each other on the left and right, and the second alignment structure includes two alignment rods arranged opposite to each other on the left and right. During alignment, the front ends of the two alignment rods will be inserted between the two alignment plates, and the outer side surfaces of the alignment rods will fit with the inner side surfaces of the alignment plates.

6. The automatic alignment and clamping device for aircraft heat exchanger cold circuit pressure drop testing according to claim 5, characterized in that: The front end of the alignment plate is bent toward the outer side.

7. The automatic alignment clamping device for aircraft heat exchanger cold circuit pressure drop testing according to claim 1, characterized in that: The limiting structure includes limiting plates arranged on both sides of the heat exchanger parking space and a limiting rod group arranged behind the heat exchanger parking space. The limiting plates and the limiting rod group are both vertically fixed on the top of the alignment trolley.

8. The automatic alignment clamping device for aircraft heat exchanger cold circuit pressure drop testing according to claim 7, characterized in that: The limiting rod group includes two limiting rods, and the two limiting rods are arranged opposite to each other on the left and right sides.

9. The automatic alignment clamping device for aircraft heat exchanger cold circuit pressure drop testing according to claim 1, characterized in that: The bottom surface of the heat exchanger parking space and the bottom surface of the installation space are respectively provided with a first bottom plate and a second bottom plate, and the first bottom plate and the second bottom plate are located at the same horizontal height.

Images