A quick-mounting small two-flow channel fuel nozzle flow measuring device and method

Abstract

The application discloses a kind of quick-mounting small two-flow channel fuel nozzle flow measuring device and method, and the quick-mounting small two-flow channel fuel nozzle measuring device is composed of threaded connection oil nozzle, inner thread quick connector, O-ring, oil-resistant washer, quick-mounting oil nozzle and screw.The threaded connection oil nozzle and quick-mounting oil nozzle are assembled by screw thread, and then clamped on the two-flow channel fuel nozzle by the elastomer on the quick-mounting oil nozzle.When the quick-mounting small two-flow channel fuel nozzle measuring device of the application is used for flow test, it can overcome the size and space limitations of small two-flow channel fuel nozzle, and meet the flow test requirements of small two-flow channel fuel nozzle flow measurement for aeroengine casing.

Description

Technical Field

[0001] This invention belongs to the field of aero-engine component testing technology, and relates to a small two-channel fuel injector flow measurement device and method. Background Technology

[0002] like Figure 6 The image shows a small two-channel fuel injector for an aircraft engine casing. During flow measurement tests on this small two-channel fuel injector, due to limitations in its size (close distance between the two nozzles) and spatial position (a spatial angle between the two nozzles), suitable fuel receiving fixtures are currently lacking, making installation and fixation difficult (e.g., ...). Figure 6 As shown, the small two-channel fuel injector lacks a suitable mounting structure. To meet the flow rate testing requirements, a small two-channel fuel injector measurement device and method need to be designed to meet the experimental needs of flow rate measurement of aero-engine casing nozzles. Summary of the Invention

[0003] The present invention aims to disclose a quick-installation small two-channel fuel injector flow measurement device and method, which meets the test requirements for flow measurement of small two-channel fuel injectors in aero-engine casings and the technical requirements for the assembly process of aero-engine casing components.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A quick-installation, small-sized two-channel fuel injector flow measurement device includes:

[0006] The threaded nozzle is a stepped cylinder with a blind hole on its first axial end face. The blind hole includes a first annular groove serving as a first oil receiving cavity, a second annular groove serving as a sealing ring mounting groove, and a channel for installing a small two-channel fuel injector. The channel passes through the second annular groove and communicates with the first annular groove. An external thread is machined on the outer cylindrical surface of the first axial end of the threaded nozzle. A first threaded connector is also connected to the outer cylindrical surface of the threaded nozzle. An external thread is machined on the end of the first threaded connector away from the threaded nozzle. A through hole is opened on the axial end face of the first threaded connector, and the through hole communicates with the first annular groove to form a first oil passage.

[0007] The quick-connect oil nozzle is cylindrical in shape and has a through hole penetrating two axial end faces. The through hole includes a channel for installing a small two-channel oil nozzle, an internal threaded hole for connecting a threaded oil nozzle, a third annular groove serving as a second oil receiving chamber, and a fourth annular groove located on both sides of the third annular groove and serving as a sealing ring mounting groove. A second threaded connector is connected to the outer cylindrical surface of the quick-connect oil nozzle. The end of the second threaded connector away from the quick-connect oil nozzle is machined with an external thread. The axial end face of the second threaded connector has a through hole that communicates with the third annular groove to form a second oil passage. Between the third annular groove and the axial end face of the quick-connect oil nozzle away from the internal threaded hole, and on the outer cylindrical surface of the quick-connect oil nozzle, there are also a first groove, a second groove, and a threaded hole. The first groove is perpendicular to the axial direction of the quick-connect oil nozzle, the second groove is parallel to the axial direction of the quick-connect oil nozzle, and the threaded hole penetrates the second groove.

[0008] O-rings are installed in the second and fourth annular grooves;

[0009] An oil-resistant gasket is installed between the axial first end face of the threaded connection oil nozzle and the bottom of the internal thread hole of the quick-connect oil nozzle.

[0010] The quick-connect coupling has an internal threaded through hole, and the two quick-connect couplings are respectively connected to the external threads of the first threaded coupling and the second threaded coupling.

[0011] A screw, which is connected to a threaded hole on the outer cylindrical surface of the quick-connect grease fitting.

[0012] As one embodiment, in the blind hole of the threaded connection nozzle, the inner diameters of the first annular groove, the second annular groove, and the channel decrease sequentially.

[0013] As one option, the number of the second annular grooves is two or more.

[0014] As one solution:

[0015] The through hole of the first threaded connector is tangent to the first annular groove of the threaded connection nozzle, and the axis of the through hole intersects perpendicularly with the axis of the first annular groove.

[0016] The through hole of the second threaded connector is tangent to the third annular groove of the quick-connect oil nozzle, and the axis of the through hole intersects perpendicularly with the axis of the third annular groove.

[0017] As one solution:

[0018] The depth of the first slot is greater than the radius of the outer cylindrical surface of the quick-connect oil nozzle;

[0019] The second slot is aligned with the axis of the quick-connect nozzle, and the slot depth is greater than the radius of the outer cylindrical surface of the quick-connect nozzle.

[0020] As one solution:

[0021] The material of the threaded oil nozzle is 20Cr13 with a hardness of HRC33-38.

[0022] The material of the internal thread quick connector is 20Cr13 with a hardness of HRC33-38.

[0023] The quick-connect oil nozzle is made of 20Cr13 with a hardness of HRC33-38.

[0024] As one approach, the straight-line distance between the center of the first annular groove and the center of the third annular groove is equal to the straight-line distance between the first and second injection ports on the small two-channel fuel injector.

[0025] A method for measuring the flow rate of a small two-channel fuel injector, employing the aforementioned quick-installation small two-channel fuel injector flow rate measuring device, includes the following steps:

[0026] Step 1: Install the O-rings in the second and fourth annular grooves respectively. Then, install the oil-resistant gasket between the first axial end face of the threaded connection nozzle and the bottom of the internal threaded hole of the quick-connect nozzle. Finally, insert the threaded connection nozzle into the internal threaded hole of the quick-connect nozzle through the external thread on the outer cylindrical surface of its first axial end.

[0027] Step 2: Insert the end of the small two-channel fuel injector corresponding to the first fuel injector port into the through hole of the quick-connect fuel injector from the axial end face of the quick-connect fuel injector port away from the threaded connection fuel injector port until the first fuel injector port enters the first annular groove and the second fuel injector port enters the third annular groove.

[0028] Step 3: Insert the screw into the threaded hole on the outer cylindrical surface of the quick-connect nozzle and tighten it, so that the part of the quick-connect nozzle between the first groove and the oil inlet of the small two-channel injector reduces the outer diameter through the second groove, thereby clamping the small two-channel injector.

[0029] Step 4: Connect the small two-channel fuel injector, the quick-connect small two-channel fuel injector flow measurement device, and the flow test oil connection line using the female thread quick-connect coupling.

[0030] Compared with the prior art, the present invention designs a quick-installation small two-channel fuel injector measuring device, which can not only quickly and accurately position and fix the device on the small two-channel fuel injector of the aero-engine casing, but also improve the efficiency of nozzle flow testing, further improve the work quality, and well meet the usage requirements. Finally, it solves the problem of difficulty in installing the fuel receiving structure due to the size and space position limitations of the fuel injector in the nozzle flow measurement test of the aero-engine casing. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the operation of a small two-channel fuel injector measuring device;

[0032] Figure 2 This is a schematic diagram of a small two-channel fuel injector measuring device;

[0033] Figure 3 This is a schematic diagram of a threaded connection oil nozzle;

[0034] Figure 4 This is a schematic diagram of an internal thread quick-connect coupling;

[0035] Figure 5 This is a schematic diagram of a quick-connect oil nozzle;

[0036] Figure 6 This is a schematic diagram of a small two-channel fuel injector;

[0037] Figure 7 This is a perspective view of a small two-channel fuel injector measuring device;

[0038] In the diagram: 1. Threaded oil nozzle, 2. Internal thread quick-connect fitting, 3. O-ring, 4. Oil-resistant washer, 5. Quick-connect oil nozzle, 6. Socket head cap screw, 7. First threaded connector, 8. Second threaded connector. Detailed Implementation

[0039] The present invention will be further described below with reference to specific embodiments, but it should not be construed as limiting the scope of the subject matter of the present invention to the following embodiments. All modifications, substitutions and alterations made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0040] Working principle analysis of the quick-installation miniature two-channel fuel injector measuring device:

[0041] from Figure 6 As can be seen from this, during the flow measurement test of the quick-installation small two-channel fuel injector in the aero-engine casing, it is not only necessary to install the fuel inlet on the small two-channel fuel injector in the casing, but also to conduct flow measurement tests on the first and second fuel inlets of the small two-channel fuel injector in the casing at the same time.

[0042] Based on the design principles of economy, speed, and convenience, such as Figure 1 and Figure 2 As shown, the small two-channel fuel injector measuring device is designed in two parts, wherein, Figure 2The left end is a threaded nozzle 1, used to measure the flow rate of the first nozzle on the small two-channel fuel injector of the engine casing. The right end is a quick-connect nozzle 5, used to measure the flow rate of the second nozzle on the small two-channel fuel injector of the engine casing. The threaded nozzle 1 and the quick-connect nozzle 5 are connected by threads to form a whole to form a small two-channel fuel injector measuring device. The quick-connect nozzle 5 is installed and fixed on the small two-channel fuel injector of the aero-engine casing by the elastic clamping method on the right end. It can meet the process requirements of flow measurement test of small two-channel fuel injector of aero-engine.

[0043] The working principle of the quick-installation miniature two-channel fuel injector flow measurement device is as follows:

[0044] (1) When testing is required, the threaded oil nozzle 1 and quick-connect oil nozzle 5 are combined into one unit by thread, O-ring 3 and oil-resistant gasket 4. Its advantages are that it is easy to process, improves the sealing effect and working efficiency.

[0045] (2) The positioning and fixing method of the small two-channel fuel injector measuring device adopts the cylindrical head internal hexagon screw 6 on the quick-connect fuel injector 5 through the elastic semi-cylinder (i.e. Figure 1 The right end of the quick-connect oil nozzle 5 has a first groove and a second groove. The first groove is located at... Figure 1 The middle is perpendicular to the axis of the small two-channel fuel injector measuring device, while the second slot is in Figure 1 (Parallel to the axis of the small two-channel fuel injector measuring device) so that the small two-channel fuel injector measuring device is firmly clamped on the small two-channel fuel injector of the aero-engine casing, and ensures the relative position of the threaded connection nozzle 1 and quick-connect nozzle 5 of the small two-channel fuel injector measuring device with the first and second fuel injection ports of the small two-channel fuel injector of the aero-engine casing.

[0046] (3) Figure 2 The image shows the left end of the small two-channel fuel injector measuring device connected to the fuel injector channel. Figure 3 As shown, φg is the left end oil nozzle flow channel and the first oil receiving cavity. Figure 2 (The area highlighted in black) The first oil receiving chamber is an independent oil receiving chamber achieved by two O-rings 3 arranged on the same side, satisfying... Figure 6 The first injection port on the left end of the small two-channel fuel injector in the middle casing receives fuel.

[0047] (4) Figure 2 The image shows the intermediate nozzle flow channel of the quick-installation small two-channel fuel injector flow measurement device. Figure 5 As shown, φD is the intermediate oil nozzle flow channel and the second oil receiving cavity. Figure 2 The area marked with bold black lines in the middle) indicates that the second oil receiving chamber is an independent oil receiving chamber formed by the left and right O-rings 3 inside the quick-connect oil nozzle 5, which meets the requirements of... Figure 6The second fuel injection port in the middle of the small two-channel fuel injector in the middle casing receives the fuel.

[0048] Structural design of quick-installation miniature two-channel fuel injector flow measurement device:

[0049] Based on the above analysis of the working principle, the present invention designs as follows: Figures 1-5 The small two-channel fuel injector measuring device shown.

[0050] Figure 1 and Figure 2 The quick-installation small two-channel fuel injector flow measurement device shown in the image mainly consists of a threaded fuel injector 1, an internal thread quick-connect fitting 2, an O-ring 3, an oil-resistant washer 4, a quick-install fuel injector 5, and a cylindrical head internal hexagon screw 6.

[0051] Threaded oil nozzle 1 Figure 3 As shown, the threaded nozzle 1 is assembled and welded from its main body and the first threaded connector 7. The threaded nozzle 1 is a stepped cylinder with a Φa x b mm diameter cylinder at the left end and a Mc external thread (dbe mm) at the right end for connecting to the quick-connect nozzle 5. The Φf x g mm annular groove at the left end serves as the first oil receiving cavity. The upper end of the first oil receiving cavity has a Φg hole tangent to the Φf x g mm annular groove, forming an oil passage with the threaded nozzle 1. A Φh mm through hole is used to install a small two-channel fuel injector. Two Φj x k mm grooves are machined in the Φh mm hole for installing O-rings 3, making the Φf x g mm annular groove at the left end the first oil receiving cavity and forming an independent oil passage. The threaded nozzle 1 is made of 20Cr13 with a hardness of HRC 33-38.

[0052] Threaded quick-connect coupling 2 Figure 4 As shown, it is a slip-on nut type. The left end M threaded hole is used to install on the first threaded connector 7 of the threaded connection nozzle 1 or the second threaded connector 8 of the quick-connect nozzle 5, and the right end Φl hole is used to install the connecting oil pipe. The material of the internal thread quick-connect connector 2 is 20Cr13 with a hardness of HRC33~38.

[0053] Quick-connect oil nozzle 5 Figure 5As shown, the quick-connect nozzle 5 is assembled and welded from its body and a second threaded connector 8. The body of the quick-connect nozzle 5 is a ΦAmm cylinder with a ΦBmm through hole in the center for installing a small two-channel fuel injector. The right end has an M threaded hole for connecting with the Mc external thread of the threaded nozzle 1 to form a single unit. The middle part has a ΦCXDmm annular groove, and the upper end of the ΦCXDmm annular groove has a ΦDmm hole for connecting with the threaded connector to form an oil inlet pipe. At each end of the ΦCXDmm annular groove, there is a ΦEXF annular groove for installing an O-ring 3, making the quick-connect nozzle's ΦCXDmm annular groove a second oil inlet cavity and an independent oil inlet pipe. A vertical groove of Hmm depth and Jmm depth is opened at the left end at Gmm, and a horizontal groove of KX[(A / 2)+L]mm is opened on the ΦAmm cylinder to form an elastic body. A ΦQmm hole is machined at the left end Pmm. The center of the ΦQmm hole and the lower end of the ΦAmm cylinder are M threaded holes used to press the left end elastomer onto the small two-channel fuel injector in the casing. The quick-connect fuel nozzle 5 is made of 20Cr13 material with a hardness of HRC33~38.

[0054] like Figure 7 As shown, the following steps should be followed when performing a flow measurement test on a small two-channel fuel injector:

[0055] Step 1: Install the four O-rings 3 respectively. Figure 3 The two ΦjXkmm annular grooves of the threaded connection oil nozzle 1 and Figure 5 Then install the oil-resistant gasket 4 into the two ΦEXF annular grooves. Figure 3 The end face corresponding to the right thread Mc of the medium thread connection nozzle 1 and Figure 5 Between the bottom of the M threaded hole on the right end of the quick-connect oil nozzle 5, the threaded oil nozzle 1 is finally inserted into the M threaded hole of the quick-connect oil nozzle 5 through the thread Mc on its outer cylindrical surface.

[0056] Step 2: Insert the end of the small two-channel fuel injector corresponding to the first fuel injector port into the ΦB through hole of the quick-connect fuel injector 5 from the end face of the quick-connect fuel injector 5 away from the threaded connection fuel injector 1 until the first fuel injector port enters the ΦfXgmm annular groove and the second fuel injector port enters the ΦCXDmm annular groove.

[0057] Step 3: Insert the cylindrical head hexagon socket screw 6 into the M threaded hole on the outer cylindrical surface of the quick-connect nozzle 5 and tighten it, so that the part of the quick-connect nozzle 5 between the Jmm groove and the oil inlet of the small two-channel injector reduces the outer diameter of the outer cylinder through the KX[(A / 2)+L]mm groove, thereby clamping the small two-channel injector.

[0058] Step 4: Connect the small two-channel fuel injector, the quick-connect small two-channel fuel injector flow measurement device, and the flow test oil connection pipeline through the internal thread quick-connect coupling 2.

[0059] Contents not described in detail in this specification are prior art known to those skilled in the art. Although illustrative specific embodiments of the invention have been described above to facilitate understanding by those skilled in the art, it should be understood that the invention is not limited to the scope of the specific embodiments. Various modifications are readily apparent to those skilled in the art as long as they fall within the spirit and scope of the invention as defined and determined by the appended claims, and all inventions utilizing the concept of this invention are protected.

Claims

1. A quick-installation, small-sized two-channel fuel injector flow measurement device, characterized in that, include: The threaded connection nozzle (1) is a stepped cylinder with a blind hole on its first axial end face. The blind hole includes a first annular groove as a first oil receiving cavity, a second annular groove as a sealing ring mounting groove, and a channel for installing a small two-channel oil nozzle. The channel passes through the second annular groove and communicates with the first annular groove. The threaded connection nozzle (1) has an external thread on its outer cylindrical surface at the first axial end. The threaded connection nozzle (1) also has a first threaded connector (7) connected to its outer cylindrical surface. The first threaded connector (7) has an external thread on its end away from the threaded connection nozzle (1). The first threaded connector (7) has a through hole on its axial end face and communicates with the first annular groove to form a first oil passage. The quick-connect oil nozzle (5) is cylindrical in shape and has a through hole that penetrates two axial end faces. The through hole includes a channel for installing a small two-channel oil nozzle, an internal threaded hole for connecting a threaded oil nozzle (1), a third annular groove serving as a second oil receiving chamber, and a fourth annular groove located on both sides of the third annular groove and serving as a sealing ring mounting groove. A second threaded connector (8) is connected to the outer cylindrical surface of the quick-connect oil nozzle (5). The second threaded connector (8) is located away from the quick-connect oil nozzle. One end of the oil nozzle (5) is machined with an external thread, and the axial end face of the second threaded connector (8) is opened with a through hole. The through hole is connected with the third annular groove to form a second oil passage. The third annular groove is between the axial end face of the quick-connect oil nozzle (5) away from the internal thread hole and on the outer cylindrical surface of the quick-connect oil nozzle (5), there is also a first groove, a second groove and a threaded hole. The first groove is perpendicular to the axial direction of the quick-connect oil nozzle (5), the second groove is parallel to the axial direction of the quick-connect oil nozzle (5), and the threaded hole passes through the second groove. O-ring (3), said O-ring (3) is installed in the second annular groove and the fourth annular groove; Oil-resistant gasket (4), the oil-resistant gasket (4) is installed between the first end face of the threaded connection oil nozzle (1) and the bottom of the internal thread hole of the quick-connect oil nozzle (5); The internal thread quick connector (2) has a through hole with internal thread, and the two internal thread quick connectors (2) are respectively connected to the external threads of the first threaded connector (7) and the second threaded connector (8); Screws, which are connected to threaded holes on the outer cylindrical surface of quick-connect oil nozzles (5); The groove depth of the first slot is greater than the radius of the outer cylindrical surface of the quick-connect oil nozzle (5); The second slot is too far from the axis of the quick-connect oil nozzle (5), and the slot depth is greater than the radius of the outer cylindrical surface of the quick-connect oil nozzle (5); The straight-line distance between the center of the first annular groove and the center of the third annular groove is equal to the straight-line distance between the first and second injection ports on the small two-channel fuel injector.

2. The quick-installation miniature two-channel fuel injector flow measurement device according to claim 1, characterized in that: In the blind hole of the threaded connection nozzle (1), the inner diameters of the first annular groove, the second annular groove, and the channel decrease sequentially.

3. The quick-installation miniature two-channel fuel injector flow measurement device according to claim 2, characterized in that: The number of the second annular slots is two or more.

4. The quick-installation miniature two-channel fuel injector flow measurement device according to claim 1, characterized in that: The through hole of the first threaded connector (7) is tangent to the first annular groove of the threaded connection oil nozzle (1), and the axis of the through hole intersects perpendicularly with the axis of the first annular groove. The through hole of the second threaded connector (8) is tangent to the third annular groove of the quick-connect oil nozzle (5), and the axis of the through hole intersects perpendicularly with the axis of the third annular groove.

5. The quick-installation miniature two-channel fuel injector flow measurement device according to claim 1, characterized in that: The material of the threaded oil nozzle (1) is 20Cr13 with a hardness of HRC33-38; The material of the internal thread quick connector (2) is 20Cr13 with a hardness of HRC33-38; The quick-connect oil nozzle (5) is made of 20Cr13 with a hardness of HRC33-38.

6. A method for measuring the flow rate of a small two-channel fuel injector, characterized in that, The quick-installation miniature two-channel fuel injector flow measurement device according to claim 1 includes the following steps: Step 1: Install the O-ring (3) in the second annular groove and the fourth annular groove respectively. Then, install the oil-resistant gasket (4) between the first end face of the threaded connection nozzle (1) and the bottom of the internal thread hole of the quick-connect nozzle (5). Finally, install the threaded connection nozzle (1) into the internal thread hole of the quick-connect nozzle (5) through the external thread on the outer cylindrical surface of its first axial end. Step 2: Insert the end of the small two-channel fuel injector corresponding to the first fuel injector port into the through hole of the quick-connect fuel injector (5) from the axial end face of the quick-connect fuel injector (5) away from the threaded connection fuel injector (1) until the first fuel injector port enters the first annular groove and the second fuel injector port enters the third annular groove. Step 3: Insert the screw into the threaded hole on the outer cylindrical surface of the quick-connect oil nozzle (5) and tighten it, so that the part of the quick-connect oil nozzle (5) between the first groove and the oil inlet of the small two-channel oil nozzle reduces the outer diameter through the second groove, thereby clamping the small two-channel oil nozzle. Step 4: Connect the small two-channel fuel injector, the quick-connect small two-channel fuel injector flow measurement device and the flow test oil connection pipeline through the internal thread quick-connect coupling (2).

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