Nozzle testing tool of aviation auxiliary power device

Abstract

The utility model discloses a nozzle test tool for an aviation auxiliary power device, relates to the technical field of aviation auxiliary power devices, and solves the problems that the flow and oil liquid distribution condition of a nozzle assembled on a turbine guider are not intuitively and reliably tested and test errors exist at present. The nozzle testing tool of the aviation auxiliary power device comprises a suspended bedplate, and the suspended bedplate is provided with a nozzle connecting port and a liquid collecting port used for collecting oil. The suspended bedplate is further provided with a test pedestal protruding upwards, the test pedestal is provided with a liquid collecting groove, one end of the liquid collecting groove is arranged close to the nozzle connecting port, and the other end of the liquid collecting groove is communicated with the liquid collecting port; the liquid inlet pipe and the liquid outlet pipe are fixed at the bottom of the suspended bedplate and are respectively communicated with the nozzle connecting port and the liquid collecting port.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation auxiliary power devices, in particular to a nozzle testing tool for aviation auxiliary power devices. Background Art

[0002] Auxiliary Power Unit, referred to as APU, is a small gas turbine engine. Currently, the world's mainstream civil airliners and cargo aircraft are powered by APU to provide power and air sources. It is used to start the main engine of the aircraft on the ground and to provide bleed air and power supply for the aircraft's air conditioning system and electrical equipment on the ground or in flight.

[0003] The aviation auxiliary power unit is composed of several LRU parts, including the power section, load compressor, accessory gearbox and external components. After a fixed operation period or when a failure occurs, the APU needs to be dispatched, cleaned, disassembled, repaired, and tested. Only after completing various maintenance work and confirming that the performance of the aviation auxiliary power meets the continuous airworthiness requirements can it be reinstalled on the aircraft and continue to be put into use.

[0004] In the entire maintenance process of the aviation auxiliary power unit, there is a situation where the fit of two parts must be tested after assembly to ensure that the fit of the two parts after assembly is acceptable. Among them, after the nozzle and the turbine guide vane are assembled, the performance test of the nozzle is one of the indispensable processes. When performing a performance test on the nozzle parameters on the turbine guide vane, since the existing installation location is inconvenient to test, the flow rate of the nozzle and the distribution of the sprayed oil are not intuitive and reliable, and there is a certain test error. Utility Model Content

[0005] The purpose of this application is to provide a nozzle testing tool for an aviation auxiliary power unit to solve the problem that the current testing of the nozzle flow and oil distribution conditions assembled on the turbine guide vane is not intuitive and reliable, and there are testing errors.

[0006] In order to solve the above technical problems, the utility model adopts the following solutions:

[0007] The present application discloses a nozzle test fixture for an aviation auxiliary power unit, comprising a suspended platform, on which a nozzle connection port and a liquid collecting port for collecting oil are arranged;

[0008] A test bench seat protruding upward is also provided on the suspended platform, and a liquid collecting groove is provided on the test bench seat, one end of the liquid collecting groove is provided close to the nozzle connection port, and the other end is connected to the liquid collecting port;

[0009] It also includes a liquid inlet pipe and a liquid discharge pipe fixed at the bottom of the suspended platform, and the liquid inlet pipe and the liquid discharge pipe are respectively connected with the nozzle connecting port and the liquid collecting port.

[0010] Optionally, two mounting screws for mounting the nozzle body are further provided on the suspended platform, and the two mounting screws are respectively located on both sides of the nozzle connection port.

[0011] Optionally, the bottom surface of the liquid collecting groove is inclined, and the liquid collecting port is arranged at the lowest position of the bottom surface of the liquid collecting groove.

[0012] Optionally, the width of the liquid collecting groove ranges from 1 mm to 4 mm;

[0013] The height dimension range of the test bench is: 4mm to 5mm.

[0014] Optionally, the liquid collecting groove is in the shape of a circular ring;

[0015] The inner ring diameter of the annular liquid collecting groove ranges from 14 mm to 16 mm;

[0016] The outer ring diameter of the annular liquid collecting groove ranges from 18 mm to 20 mm.

[0017] Optionally, the width of the liquid collecting groove is 2 mm;

[0018] The inner and outer ring diameters of the annular liquid collecting groove are 15 mm and 19 mm respectively.

[0019] Optionally, the shape of the liquid collecting groove is a straight line;

[0020] One end of the liquid collecting groove near the nozzle connection port is also protruded upward with a mounting ring protrusion, and a vertical oil hole is arranged in the mounting ring protrusion, and the oil hole is connected with the liquid collecting groove;

[0021] It also includes an oil receiving nozzle inserted in the oil passage hole. The oil receiving nozzle is circular and a supporting ring is arranged on the top of the oil receiving nozzle. The oil receiving nozzle is placed on the mounting ring convex through the supporting ring on the top of the oil receiving nozzle.

[0022] Optionally, the support ring is provided with a plurality of distributed monitoring grooves evenly distributed along its circumference.

[0023] Optionally, the diameter of the oil nozzle ranges from 1 mm to 4 mm;

[0024] The distance between the top surface of the mounting ring protrusion and the top surface of the suspended platform plate ranges from 4 mm to 5 mm.

[0025] Optionally, the oil receiving nozzle is made of silicone material or plastic material.

[0026] Beneficial effects of the utility model:

[0027] After the nozzle body is installed in the present application, the oil spray port of the nozzle body is located directly above the liquid collecting groove. At this time, by using an external oil device to supply oil to the nozzle body for a certain period of time, and using the amount of oil collected in the liquid collecting groove, it can be determined whether the flow performance of the nozzle body meets the requirements. At the same time, the tester can also quickly and accurately determine whether the oil sprayed from the nozzle is spread on the test bench whether the oil spray angle of the oil spray port of the nozzle body meets the requirements, which can effectively solve the problems of the nozzle flow performance test and the oil spray port spread angle test. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the top view structure of Example 1 of the present application.

[0029] Figure 2 This is a schematic diagram of the main structure of Example 1 of the present application.

[0030] Figure 3 This is a schematic diagram of the main structure of Example 1 of the present application when testing the nozzle.

[0031] Figure 4 This is a schematic diagram of the top view structure of Example 2 of the present application.

[0032] Figure 5 This is a schematic diagram of the cross-sectional structure of Example 2 of the present application.

[0033] Figure 6 for Figure 5 A is a partial enlarged schematic diagram of the middle part.

[0034] Explanation of the reference numerals: 1-suspended platform, 101-nozzle connection port, 102-liquid collection port, 11-test bench, 111-liquid collection groove, 2-mounting screws, 3-liquid inlet pipe, 4-liquid discharge pipe, 5-nozzle body, 6-mounting ring convex, 61-oil hole, 7-oil nozzle, 71-supporting ring, 711-distribution monitoring groove. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0036] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "open", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0039] Embodiment 1:

[0040] like Figures 1 to 3 As shown, this embodiment provides a nozzle test fixture for an aviation auxiliary power unit, comprising a suspended platform 1, on which a nozzle connection port 101 and a liquid collecting port 102 for collecting oil are provided;

[0041] The suspended platform 1 is also provided with a test stand 11 protruding upwards, and a liquid collecting groove 111 is provided on the test stand 11. One end of the liquid collecting groove 111 is provided close to the nozzle connection port 101, and the other end is connected to the liquid collecting port 102.

[0042] It also includes a liquid inlet pipe 3 and a liquid discharge pipe 4 fixed to the bottom of the suspended platform 1, and the liquid inlet pipe 3 and the liquid discharge pipe 4 are connected to the nozzle connecting port 101 and the liquid collecting port 102 respectively.

[0043] In this embodiment, after the nozzle body 5 is installed, the oil injection port of the nozzle body 5 is located directly above the liquid collecting groove 111. At this time, by using an external oil device to supply oil to the nozzle body 5 for a certain period of time, the amount of oil collected in the liquid collecting groove 111 can be used to determine whether the flow performance of the nozzle body 5 meets the requirements. At the same time, the tester can also quickly and accurately determine whether the dispersion angle of the oil injection port of the nozzle body 5 meets the requirements based on whether the oil sprayed from the nozzle is spread on the test bench 11, which can effectively solve the problems of nozzle flow performance testing and oil injection port dispersion angle testing.

[0044] Specifically, in this embodiment, if Figures 1 to 3 As shown, the suspended platform 1 is also provided with two mounting screws 2 for mounting the nozzle body 5, and the two mounting screws 2 are respectively located on both sides of the nozzle connection port 101. The two mounting screws 2 can mount the nozzle body 5 on the suspended platform 1, and make the oil inlet of the nozzle body 5 communicate with the nozzle connection port 101, so as to facilitate the external oil equipment to supply oil to the nozzle body 5, so as to smoothly complete the flow performance test and the oil spray port dispersion angle test of the nozzle body 5. The heads of the two mounting screws 2 in this embodiment are provided with anti-slip grooves, so as to facilitate the installation of the nozzle body 5.

[0045] Specifically, in this embodiment, the bottom surface of the liquid collecting groove 111 is inclined, and the liquid collecting port 102 is set at the lowest position of the bottom surface of the liquid collecting groove 111, so that all oil sprayed from the nozzle body 5 can be collected by the liquid collecting port 102, avoiding oil from remaining in the liquid collecting groove 111, thereby ensuring the accuracy of the nozzle flow test.

[0046] Specifically, in this embodiment, the width of the liquid collecting groove 111 ranges from 1 mm to 4 mm;

[0047] The height dimension range of the test bench 11 is: 4mm to 5mm. After the nozzle body 5 in this embodiment is installed on the suspended platform 1, the distance between the oil injection port of the nozzle body 5 and the top surface of the suspended platform 1 is about 8mm, and the height of the test bench 11 in this embodiment is 5mm, so that the height difference between the oil injection port of the nozzle body 5 and the liquid collecting groove 111 is about 3mm, and the width of the liquid collecting groove 111 in this embodiment is about 2mm. Once the oil injection port dispersion angle of the nozzle body 5 is too large, the oil sprayed from the oil injection port will remain on the test bench 11, which is convenient for the test personnel to make intuitive judgments.

[0048] Specifically, in this embodiment, if Figure 1 As shown, the liquid collecting groove 111 is in the shape of a circular ring;

[0049] The inner ring diameter of the annular liquid collecting groove 111 ranges from 14 mm to 16 mm;

[0050] The outer diameter of the annular liquid collecting groove 111 ranges from 18 mm to 20 mm. The technicians can make specific adjustments according to the specific nozzle body 5 of different models. The inner diameter and outer diameter of the annular liquid collecting groove 111 are not given examples here to illustrate the combination of the inner diameter size and the outer diameter size.

[0051] Specifically, in this embodiment, the width of the liquid collecting groove 111 is 2 mm;

[0052] The inner and outer diameters of the annular liquid collecting groove 111 are 15 mm and 19 mm respectively.

[0053] Embodiment 2:

[0054] Specifically, based on the above-mentioned embodiment 1, in this embodiment, Figures 4 to 6 As shown, the shape of the liquid collecting groove 111 is a straight line;

[0055] The end of the liquid collecting groove 111 close to the nozzle connection port 101 also protrudes upward with a mounting ring protrusion 6, and a vertical oil hole 61 is arranged in the mounting ring protrusion 6, and the oil hole 61 is connected to the liquid collecting groove 111;

[0056] It also includes an oil receiving nozzle 7 inserted into the oil passage hole 61 . The oil receiving nozzle 7 is circular and a supporting ring 71 is provided on the top thereof. The oil receiving nozzle 7 is placed on the mounting ring protrusion 6 through the supporting ring 71 on the top thereof.

[0057] By providing the mounting ring protrusion 6 and the oil receiving nozzle 7 , and placing the oil receiving nozzle 7 on the mounting ring protrusion 6 , the oil receiving nozzle 7 can be replaced according to different types of nozzle bodies 5 , which can facilitate performance testing of different types of nozzle bodies 5 .

[0058] Specifically, in this embodiment, the support ring 71 is provided with a plurality of distribution monitoring grooves 711 evenly distributed along its circumference. By providing the distribution monitoring grooves 711, the oil sprayed by the unqualified nozzle body 5 can be collected, and the distribution of the oil sprayed by the unqualified nozzle body 5 can be intuitively obtained.

[0059] Specifically, in this embodiment, the diameter of the oil receiving nozzle 7 ranges from 1 mm to 4 mm;

[0060] The distance between the top surface of the mounting annular protrusion 6 and the top surface of the suspended platform 1 is in the range of 4 mm to 5 mm. In this embodiment, the diameter of the oil nozzle 7 is 2 mm, and technicians can select other sizes of the oil nozzle 7 as needed, which will not be illustrated here.

[0061] Specifically, in the present embodiment, the oil receiving nozzle 7 is made of silicone material or plastic material, which can reduce the manufacturing cost of the oil receiving nozzle 7 and facilitate testing of nozzle bodies 5 of different models.

[0062] The rest of the structure of this embodiment is the same as that of Embodiment 1 and will not be described in detail here.

[0063] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A nozzle test tool for an aviation auxiliary power unit, characterized in that: The suspended platform (1) comprises a nozzle connection port (101) and a liquid collection port (102) for collecting oil. A test stand (11) protruding upward is also provided on the suspended platform (1), and a liquid collecting groove (111) is provided on the test stand (11), one end of the liquid collecting groove (111) is arranged close to the nozzle connection port (101), and the other end is connected to the liquid collecting port (102); It also comprises a liquid inlet pipe (3) and a liquid discharge pipe (4) fixed to the bottom of the suspended platform (1); the liquid inlet pipe (3) and the liquid discharge pipe (4) are respectively connected to the nozzle connection port (101) and the liquid collection port (102).

2. The nozzle test fixture for an aviation auxiliary power unit according to claim 1, characterized in that: The suspended platform (1) is also provided with two mounting screws (2) for mounting the nozzle body (5), and the two mounting screws (2) are respectively located on both sides of the nozzle connection port (101).

3. The nozzle test fixture for an aviation auxiliary power unit according to claim 1, characterized in that: The bottom surface of the liquid collecting groove (111) is arranged to be inclined, and the liquid collecting port (102) is arranged at the lowest position of the bottom surface of the liquid collecting groove (111).

4. The nozzle test fixture for an aviation auxiliary power unit according to claim 1, characterized in that: The width of the liquid collecting groove (111) ranges from 1 mm to 4 mm; The height dimension range of the test bench (11) is 4 mm to 5 mm.

5. The nozzle test fixture for an aviation auxiliary power unit according to claim 4, characterized in that: The liquid collecting groove (111) is in the shape of a circular ring; The inner ring diameter of the annular liquid collecting groove (111) ranges from 14 mm to 16 mm; The outer ring diameter of the annular liquid collecting groove (111) ranges from 18 mm to 20 mm.

6. The nozzle test fixture for an aviation auxiliary power unit according to claim 4, characterized in that: The width of the liquid collecting groove (111) is 2 mm; The inner and outer diameters of the annular liquid collecting groove (111) are 15 mm and 19 mm respectively.

7. The nozzle test fixture for an aviation auxiliary power unit according to claim 6, characterized in that: The shape of the liquid collecting groove (111) is a straight line; An end of the liquid collecting groove (111) close to the nozzle connection port (101) is also protruded upward with a mounting ring protrusion (6), a vertical oil hole (61) is arranged in the mounting ring protrusion (6), and the oil hole (61) is communicated with the liquid collecting groove (111); It also includes an oil receiving nozzle (7) inserted into the oil passage hole (61); the oil receiving nozzle (7) is circular and a supporting ring (71) is provided on the top of the oil receiving nozzle (7); the oil receiving nozzle (7) is placed on the mounting ring protrusion (6) through the supporting ring (71) on the top of the oil receiving nozzle (7).

8. The nozzle test fixture for an aviation auxiliary power unit according to claim 7, characterized in that: The support ring (71) is provided with a plurality of distributed monitoring grooves (711) evenly distributed along its circumference.

9. The nozzle test fixture for an aviation auxiliary power unit according to claim 7, characterized in that: The diameter of the oil receiving nozzle (7) ranges from 1 mm to 4 mm; The distance between the top surface of the mounting annular protrusion (6) and the top surface of the suspended platform (1) ranges from 4 mm to 5 mm.

10. The nozzle test fixture for an aviation auxiliary power unit according to claim 7, characterized in that: The material of the oil receiving nozzle (7) is silicone material or plastic material.

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