Fast-assembly small two-flow-channel oil nozzle flow measuring device and fast-assembly small two-flow-channel oil nozzle flow measuring method

Abstract

The invention discloses a device and a method for measuring the flow of a quick-assembly small two-flow-channel oil nozzle. The device for measuring the flow of the quick-assembly small two-flow-channel oil nozzle is composed of a threaded connection oil nozzle, an internal thread quick connector, an O-shaped ring, an oil-resistant gasket, a quick-assembly oil connection nozzle and a screw. And the threaded connection oil nozzle and the quick-assembly oil receiving nozzle are assembled through threads, and are clamped on the two-runner oil nozzle through an elastic body on the quick-assembly oil receiving nozzle. When the fast-assembly small-sized two-flow-channel oil nozzle measuring device is used for flow testing, the size and space limitation of the small-sized two-flow-channel oil nozzle can be overcome, and the flow testing requirement of flow measurement of the small-sized two-flow-channel oil nozzle of an aero-engine casing is met.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation engine component testing and relates to a flow measurement device and method for a small two-flow channel fuel injection nozzle. Background Art

[0002] like Figure 6 As shown in the figure, a small two-flow nozzle for an aircraft engine casing is used for flow measurement. Due to the limitations of the nozzle size (the distance between the two nozzles is relatively close) and spatial position (there is a spatial angle between the two nozzles), there is currently a lack of suitable oil receiving fixtures, making it difficult to install and fix (e.g. Figure 6 As shown, the small two-flow nozzle lacks a suitable fixing and clamping structure. In order to meet the flow test requirements, it is necessary to design a small two-flow nozzle measurement device and method to meet the test needs of aircraft engine casing nozzle flow measurement. Summary of the Invention

[0003] The present invention aims to disclose a quick-install small two-flow nozzle flow measurement device and method, which meet the test needs of flow measurement of small two-flow nozzles in aircraft engine casings and the technical requirements of the aircraft engine casing component assembly process.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A quick-install small two-flow nozzle flow measurement device, comprising:

[0006] A threaded oil nozzle, wherein the threaded oil nozzle has an outer shape of a stepped cylinder, a blind hole is formed on a first axial end surface thereof, the blind hole comprises a first annular hole groove serving as a first oil receiving chamber, a second annular hole groove serving as a sealing ring mounting groove, and a channel for mounting a small two-flow channel oil nozzle, the channel passes through the second annular hole groove and is connected to the first annular hole groove, an external thread is machined on an outer cylindrical surface of the first axial end of the threaded oil nozzle, a first threaded joint is further connected to the outer cylindrical surface of the threaded oil nozzle, an end of the first threaded joint away from the threaded oil nozzle is machined with an external thread, a through hole is formed on an axial end surface of the first threaded joint, and the through hole is connected to the first annular hole groove to form a first oil pipeline;

[0007] The quick-install oil nozzle has the shape of a cylinder, and a through hole is axially opened on the two axial end faces, and the through hole includes a channel for installing a small two-flow channel oil nozzle, an internal threaded hole for connecting the threaded oil nozzle, a third annular hole groove as a second oil receiving chamber, and a fourth annular hole groove located on both sides of the third annular hole groove and serving as a sealing ring mounting groove. A second threaded joint is connected to the outer cylindrical surface of the quick-install oil nozzle, and an external thread is processed on the end of the second threaded joint away from the quick-install oil nozzle. A through hole is opened on the axial end face of the second threaded joint, and the through hole is connected with the third annular hole groove to form a second oil pipeline. A first notch, a second notch and a threaded hole are further opened between the third annular groove hole and the axial end face of the quick-install oil nozzle away from the internal threaded hole and on the outer cylindrical surface of the quick-install oil nozzle. The first notch is perpendicular to the axial direction of the quick-install oil nozzle, and the second notch is parallel to the axial direction of the quick-install oil nozzle, and the threaded hole passes through the second notch;

[0008] An O-ring is installed in the second annular groove and the fourth annular groove;

[0009] An oil-resistant washer installed between the axial first end face of the threaded oil nozzle and the bottom of the internal threaded hole of the quick-connect oil nozzle;

[0010] An internal thread quick-connect joint, wherein the internal thread quick-connect joint has a through hole with an internal thread, and the two internal thread quick-connect joints are respectively connected to the external threads of the first threaded joint and the second threaded joint;

[0011] The screw is connected to the threaded hole on the outer cylindrical surface of the quick-install oil nozzle.

[0012] As a solution, in the blind hole of the threaded oil nozzle, the inner diameters of the first annular hole groove, the second annular hole groove and the channel decrease in sequence.

[0013] As a solution, the number of the second annular slots is two or more.

[0014] As a solution:

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

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

[0017] As a solution:

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

[0019] The second notch passes through the axis of the quick-fit oil nozzle, and the depth of the notch is greater than the radius of the outer cylindrical surface of the quick-fit oil nozzle.

[0020] As a 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 connect joint is 20Cr13, with a hardness of HRC33-38;

[0023] The material of the quick-install oil nozzle is 20Cr13, with a hardness of HRC33-38.

[0024] As a solution, the straight-line distance between the center of the first annular hole groove and the center of the third annular hole groove is equal to the straight-line distance between the first injection port and the second injection port on the small two-flow channel fuel injector.

[0025] A method for measuring the flow rate of a small two-flow nozzle adopts the above-mentioned quick-install small two-flow nozzle flow rate measuring device and includes the following steps:

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

[0027] Step 2: Insert the end of the small two-flow nozzle corresponding to the first nozzle into the through hole of the quick-connect nozzle from the axial end surface on the side away from the threaded connection nozzle until the first nozzle enters the first annular groove and the second nozzle enters the third annular groove;

[0028] Step 3: Install a screw into the threaded hole on the outer cylindrical surface of the quick-connect nozzle and tighten it so that the portion of the quick-connect nozzle between the first notch and the oil inlet of the small two-flow nozzle is reduced in outer diameter through the second notch, thereby clamping the small two-flow nozzle.

[0029] Step 4: Connect the small two-flow nozzle, the quick-install small two-flow nozzle flow measurement device and the flow test oil connection pipeline through the female thread quick connector.

[0030] Compared with the prior art, the present invention designs a quick-install small two-flow nozzle measuring device, which not only can quickly and accurately position and fix the device on the small two-flow nozzle of the aircraft engine casing, but also improves the efficiency of the nozzle flow test, further improves the work quality, and well meets the use requirements, and ultimately solves the problem of difficulty in installing the oil receiving structure due to the size and spatial position limitations of the nozzle in the aircraft engine casing nozzle flow measurement test. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a working diagram of a small two-flow nozzle measuring device;

[0032] Figure 2 This is a schematic diagram of a small two-flow nozzle measuring device;

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

[0034] Figure 4 This is a schematic diagram of a female quick-connect connector;

[0035] Figure 5 This is a diagram of a quick-install oil nipple;

[0036] Figure 6 It is a schematic diagram of a small two-flow nozzle;

[0037] Figure 7 This is a perspective view of a small two-flow nozzle measuring device;

[0038] In the figure: 1. Threaded grease nipple, 2. Female quick-connect fitting, 3. O-ring, 4. Oil-resistant washer, 5. Quick-connect grease nipple, 6. Hexagon socket head cap screw, 7. First threaded joint, 8. Second threaded joint. DETAILED DESCRIPTION

[0039] The present invention is further described below with reference to specific embodiments. However, it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various modifications, substitutions and changes made according to common technical knowledge and customary means in the field are included in the scope of the present invention.

[0040] Analysis of the working principle of the quick-install small two-flow nozzle measuring device:

[0041] from Figure 6 It can be seen that during the flow measurement test of the small two-flow channel fuel injector of the aircraft engine casing, it is necessary not only to install the oil nozzle on the small two-flow channel fuel injector of the casing, but also to conduct flow measurement tests on the first fuel injection port and the second fuel injection port of the small two-flow channel fuel injector of the casing at the same time.

[0042] According to the design principles of economy, speed and convenience, such as Figure 1 and Figure 2 As shown in the figure, the small two-flow nozzle measuring device is designed into two parts, among which, Figure 2The left end is a threaded oil nozzle 1, which is used to measure the flow of the first oil nozzle on the small two-channel oil nozzle of the casing. Secondly, the right end is a quick-release oil nozzle 5, which is used to measure the flow of the second oil nozzle on the small two-channel oil nozzle of the casing. The threaded oil nozzle 1 and the quick-release oil nozzle 5 are connected as a whole by threads to form a small two-channel oil nozzle measuring device, and the small two-channel oil nozzle measuring device is installed and fixed on the small two-channel oil nozzle of the aircraft engine casing through the elastic clamping method of the right end of the quick-release oil nozzle 5. It can meet the flow measurement test process requirements of the small two-channel oil nozzle of the aircraft engine.

[0043] The working principle of the quick-install small two-flow nozzle flow measurement device is as follows:

[0044] (1) When testing is required, the threaded oil nozzle 1 and the quick-install oil nozzle 5 are combined into one through the thread, O-ring 3 and oil-resistant gasket 4. This has the advantage of being easy to process and improving the sealing effect and work efficiency.

[0045] (2) The positioning and fixing form of the small two-flow nozzle measuring device is to use the cylindrical head hexagonal screw 6 on the quick-install nozzle 5 through the elastic semi-cylinder (i.e. Figure 1 The right end of the middle quick-install oil nozzle 5 has a first notch and a second notch, the first notch is at Figure 1 The second notch is perpendicular to the axis of the small two-channel fuel injection nozzle measuring device. Figure 1 The small two-channel fuel injector measuring device is parallel to the axis direction 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 aircraft engine casing, and the threaded connection nozzle 1 and the quick-release fuel nozzle 5 of the small two-channel fuel injector measuring device are ensured to be in relative position with the first fuel injection port and the second fuel injection port of the small two-channel fuel injector of the aircraft engine casing.

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

[0047] (4) Figure 2 The middle nozzle flow path of the quick-install small two-channel fuel injector flow measurement device is shown in the figure. Figure 5 As shown, φD is the middle oil receiving nozzle flow channel) and the second oil receiving chamber ( Figure 2 The second oil receiving chamber is formed by the left and right O-rings 3 in the quick-install oil receiving nozzle 5, which is an independent oil receiving chamber. Figure 6The second fuel injection port in the middle of the small two-flow fuel injection nozzle in the middle casing receives oil.

[0048] Structural design of quick-install small two-flow nozzle flow measurement device:

[0049] Through the above working principle analysis, the present invention designs the following Figures 1 to 5 The small two-flow nozzle measuring device shown.

[0050] Figure 1 and Figure 2 The quick-install small two-flow nozzle flow measurement device is shown in the figure. It mainly consists of a threaded nozzle 1, a female quick-connect joint 2, an O-ring 3, an oil-resistant gasket 4, a quick-install nozzle 5, a cylindrical head hexagon socket screw 6, etc.

[0051] Threaded connection nozzle 1 Figure 3 As shown, the threaded nozzle 1 is welded together with the main body of the threaded connection nozzle 1 and the first threaded joint 7. The threaded connection nozzle 1 is a stepped cylindrical body with a ΦaXbmm cylindrical body on the left end and an Mc external thread (length (dbe) mm) on the right end for connecting to the quick-install connection nozzle 5. The ΦfXgmm annular groove on the left end serves as the first oil receiving chamber. The upper end of the first oil receiving chamber is a Φg hole, which is tangential to the ΦfXgmm annular groove and forms an oil pipeline with the threaded connection nozzle 1. The Φhmm through-hole is used to install a small two-flow nozzle. Two ΦjXkmm grooves are machined in the Φhmm hole for installing O-rings 3, forming the ΦfXgmm annular groove on the left end as the first oil receiving chamber and an independent oil pipeline. The threaded connection nozzle 1 is made of 20Cr13 with a hardness of HRC 33-38.

[0052] Female quick connect connector 2 Figure 4 As shown, it is a slip-on nut. The left-hand end, with its M-threaded hole, is used to attach to the first threaded connector 7 of the oil nozzle 1 or the second threaded connector 8 of the quick-connect oil nozzle 5. The right-hand end, with its Φ1 hole, is used to connect the oil connection pipe. The female quick-connect connector 2 is made of 20Cr13 with a hardness of HRC 33-38.

[0053] Quick-install oil nozzle 5 Figure 5As shown, the quick-connect nozzle 5 is welded together with the main body of the second threaded connector 8. The main body of the quick-connect nozzle 5 is a ΦAmm cylindrical body with a ΦBmm through-hole at the center for mounting a small two-channel injector. The M threaded hole on the right end is used to connect with the Mc external thread of the threaded connector nozzle 1, forming a single piece. The center is 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 connection line. A ΦEXF annular groove is located at each end of the ΦCXDmm annular groove for mounting an O-ring 3, forming a second oil receiving chamber and an independent oil flow line. A Hmm deep Jmm groove is longitudinally cut at the left end Gmm. A KX[(A / 2)+L]mm groove is transversely cut into 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 form an M-threaded hole, which is used to tighten the left-end elastic body onto the small two-flow nozzle in the receiver. The quick-release nozzle 5 is made of 20Cr13 with a hardness of HRC 33-38.

[0054] like Figure 7 As shown, when conducting a flow measurement test on a small two-flow nozzle, follow the steps below:

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

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

[0057] Step 3: Install the cylindrical head hexagon socket screw 6 into the M threaded hole on the outer cylindrical surface of the quick-install nozzle 5 and tighten it. The portion of the quick-install nozzle 5 between the Jmm groove and the oil inlet of the small two-flow nozzle is narrowed by the KX[(A / 2)+L]mm groove to clamp the small two-flow nozzle.

[0058] Step 4: Connect the small two-flow nozzle, the quick-install small two-flow nozzle flow measurement device and the flow test oil connection pipeline through the female thread quick connect connector 2.

[0059] Any matters not described in detail in the present specification are prior art known to those skilled in the art. Although the above description of the present invention is based on illustrative embodiments to facilitate understanding of the present invention by those skilled in the art, it should be understood that the present invention is not limited to the scope of the specific embodiments. As long as various modifications are within the spirit and scope of the present invention as defined and determined by the appended claims, such modifications will be obvious to those skilled in the art, and all inventions and creations utilizing the concepts of the present invention are protected.

Claims

1. A quick-install small two-flow nozzle flow measurement device, characterized in that: include: A threaded oil nozzle (1) is provided, wherein the threaded oil nozzle (1) has a stepped cylindrical shape, and a blind hole is provided on the first axial end face thereof, wherein the blind hole comprises a first annular hole groove as a first oil receiving chamber, a second annular hole groove as a sealing ring mounting groove, and a channel for mounting a small two-flow nozzle, wherein the channel passes through the second annular hole groove and is connected to the first annular hole groove, an external thread is machined on the outer cylindrical surface of the first axial end of the threaded oil nozzle (1), a first threaded joint (7) is further connected to the outer cylindrical surface of the threaded oil nozzle (1), an end of the first threaded joint (7) away from the threaded oil nozzle (1) is machined with an external thread, a through hole is provided on the axial end face of the first threaded joint (7), and the through hole is connected to the first annular hole groove to form a first oil pipeline; The quick-install oil nozzle (5) has a cylindrical shape and an axial through hole extending through two axial end faces. The through hole includes a channel for installing a small two-flow nozzle, an internal threaded hole for connecting a threaded oil nozzle (1), a third annular hole groove as a second oil receiving chamber, and fourth annular holes located on both sides of the third annular hole groove and serving as sealing ring mounting grooves. A second threaded joint (8) is connected to the outer cylindrical surface of the quick-install oil nozzle (5). The second threaded joint (8) is away from the quick-install nozzle. One end of the oil connection nozzle (5) is processed with an external thread, and the axial end surface of the second threaded joint (8) is provided with a through hole, which is connected to the third annular hole groove to form a second oil pipeline, and a first notch, a second notch and a threaded hole are further provided on the outer cylindrical surface of the quick-install oil connection nozzle (5) between the third annular hole groove and the axial end surface away from the internal threaded hole, wherein the first notch is perpendicular to the axial direction of the quick-install oil connection nozzle (5), the second notch is parallel to the axial direction of the quick-install oil connection nozzle (5), and the threaded hole passes through the second notch; An O-ring (3), the O-ring (3) being installed in the second annular groove and the fourth annular groove; An oil-resistant gasket (4), the oil-resistant gasket (4) being installed between the axial first end face of the threaded oil nozzle (1) and the bottom of the internal threaded hole of the quick-install oil nozzle (5); An internal thread quick-connect joint (2), wherein a through hole with an internal thread is formed on the internal thread quick-connect joint (2), and the two internal thread quick-connect joints (2) are respectively connected to the external threads of the first threaded joint (7) and the second threaded joint (8); The screw is connected to the threaded hole on the outer cylindrical surface of the quick-install oil nozzle (5).

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

3. The quick-install small two-flow nozzle flow measurement device according to claim 2, characterized in that: The number of the second annular slots is two or more.

4. The quick-install small two-flow nozzle flow rate measuring device according to claim 1, characterized in that: The through hole of the first threaded joint (7) is tangent to the first annular hole groove of the threaded oil nozzle (1), and the axis of the through hole intersects the axis of the first annular hole groove perpendicularly; The through hole of the second threaded joint (8) is tangent to the third annular hole groove of the quick-install oil nozzle (5), and the axis of the through hole intersects the axis of the third annular hole groove perpendicularly.

5. The quick-install small two-flow nozzle flow rate measuring device according to claim 1, characterized in that: The depth of the first notch is greater than the radius of the outer cylindrical surface of the quick-install oil nozzle (5); The second notch passes through the axis of the quick-fit oil connection nozzle (5), and the depth of the notch is greater than the radius of the outer cylindrical surface of the quick-fit oil connection nozzle (5).

6. The quick-install small two-flow nozzle flow rate measuring device according to claim 1, characterized in that: The material of the threaded connection oil nozzle (1) is 20Cr13, with a hardness of HRC33-38; The material of the internal thread quick-connect joint (2) is 20Cr13, with a hardness of HRC33-38; The material of the quick-install oil nozzle (5) is 20Cr13, with a hardness of HRC33-38.

7. The quick-install small two-flow nozzle flow rate measuring device according to claim 1, characterized in that: The straight-line distance between the center of the first annular hole groove and the center of the third annular hole groove is equal to the straight-line distance between the first fuel injection port and the second fuel injection port on the small two-flow channel fuel injection nozzle.

8. A method for measuring the flow rate of a small two-flow nozzle, characterized in that: The quick-install small two-flow nozzle flow measurement device according to claim 1 is used, and includes the following steps: Step 1: Install the O-ring (3) in the second annular hole groove and the fourth annular hole groove respectively, then install the oil-resistant gasket (4) between the axial first end face of the threaded connection oil nozzle (1) and the bottom of the internal threaded hole of the quick-install oil nozzle (5), and finally install the threaded connection oil nozzle (1) into the internal threaded hole of the quick-install oil nozzle (5) through the external thread on the outer cylindrical surface of the axial first end of the threaded connection oil nozzle (1); Step 2: insert one end of the small two-flow nozzle corresponding to the first nozzle into the through hole of the quick-install nozzle (5) from the axial end face of the quick-install nozzle (5) away from the threaded nozzle (1) until the first nozzle enters the first annular hole and the second nozzle enters the third annular hole; Step 3: Install the screw into the threaded hole on the outer cylindrical surface of the quick-install oil nozzle (5) and tighten it, so that the portion of the quick-install oil nozzle (5) between the first notch and the oil inlet of the small two-flow nozzle is reduced in outer diameter through the second notch, thereby clamping the small two-flow nozzle; Step 4: Connect the small two-flow nozzle, the quick-install small two-flow nozzle flow measurement device and the flow test oil connection pipeline through the internal thread quick connector (2).

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