Liquid test fixture for vortices in engine thrust chamber ignition nozzle

Abstract

The application provides a liquid test tool for a vortex finder in an engine thrust chamber ignition nozzle, and aims at solving the technical problem that the existing vortex finder detection method cannot fully reflect the real performance of the vortex finder. The liquid test tool comprises an inlet assembly, a pressing assembly, a shell simulation piece and a sleeve, the pressing assembly is used for pressing the shell simulation piece, the inlet assembly provides an inlet channel for liquid flow, and the inlet pipe, the upper flange, the upper shell and the sleeve are all provided with liquid flow channels which are sequentially communicated. The actual working environment of the vortex finder is simulated, and the liquid flow pressure is accurately obtained at the pressure measuring channel. According to the liquid test tool, the real performance of the vortex finder can be directly and accurately obtained, and a theoretical basis is provided for actual use.

Description

Technical Field

[0001] This invention relates to a testing fixture, and more particularly to a liquid testing fixture for the vortex generator inside the ignition nozzle of an engine thrust chamber, which is used in the liquid flow test of the ignition nozzle of a liquefied coal two-stage engine. Background Technology

[0002] In the liquefied coal thrust chamber, each thrust chamber has only one ignition nozzle, located at the center of hundreds of nozzles. The main function of the ignition nozzle is to ignite the medium first. Generally, a vortex generator is installed inside the ignition nozzle. The vortex generator is a tiny component, and its performance parameters directly affect the ignition speed and uniformity of the ignition nozzle.

[0003] The commonly used method for testing eddy current generators is to indirectly verify them by cutting the first piece. However, this method can only detect some features of the eddy current generator, and the test results cannot fully reflect the final true performance of the eddy current generator. At the same time, the eddy current generator has a complex structure and small size, making it difficult to cut, and the cutting quality will also affect the test results. Summary of the Invention

[0004] The purpose of this invention is to solve the technical problem that existing vortex testing methods cannot fully reflect the true performance of vortexes, and to provide a liquid testing fixture for vortexes inside the ignition nozzle of an engine thrust chamber.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] A liquid testing fixture for an vortex generator inside an ignition nozzle in an engine thrust chamber, characterized by:

[0007] This includes imported components, clamping components, housing simulation parts, and sleeves;

[0008] The inlet component includes an inlet pipe and a pressure testing channel. The pressure testing channel is located on the side wall of the inlet pipe and is connected to the inlet pipe. The end of the pressure testing channel away from the inlet pipe is connected to a pressure testing device.

[0009] The clamping assembly includes an upper flange and a lower flange; the upper flange and the lower flange are connected by fasteners; the inlet pipe is connected to the upper flange;

[0010] The shell simulation component includes an upper shell and a lower shell; the upper flange, upper shell, lower shell and lower flange are connected by a step-by-step insertion limiting connection; the lower shell is provided with a receiving chamber and a liquid flow channel from top to bottom, and the sleeve and the tested vortex generator are located in the receiving chamber of the lower shell; the inlet pipe, upper flange, upper shell and sleeve are all provided with sequentially connected liquid flow channels.

[0011] Furthermore, a measuring step is provided on the side of the lower housing, and there is a gap between the lower end of the upper housing and the measuring step. The size of the gap can be designed according to actual needs to ensure that the tested eddy current device is not damaged or deformed.

[0012] Furthermore, a first annular groove is provided radially on the inner wall of the insertion point between the upper flange and the upper housing, and a first sealing element is provided in the first annular groove; a second annular groove is provided radially on the inner wall of the insertion point between the lower side of the upper housing and the lower housing, and a second sealing element is provided in the second annular groove.

[0013] Furthermore, the lower flange has an annular boss at its lower end, and a concave circular platform inside the annular boss. The circular platform is used to prevent the lower end face of the fastener from contacting the test bench surface during installation.

[0014] Furthermore, the fastener is a double-ended stud, with its upper end threadedly connected to the upper flange and its lower end threadedly connected to the lower flange and fixed by spot welding.

[0015] Furthermore, the number of the double-ended studs is three or four, and they are evenly distributed around the circumference of the shell simulation component, thereby stably connecting the upper flange and the lower flange.

[0016] Furthermore, the inlet end of the inlet pipe is provided with a water inlet nozzle; the pressure measuring channel is provided with a pressure measuring nozzle, one end of which is connected to the pressure measuring channel and the other end of which is connected to the pressure measuring device.

[0017] Furthermore, the lower flange is provided with multiple through holes in its circumference for fixing the lower flange to the test bench with bolts.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. The liquid testing fixture of the present invention includes an inlet component, a clamping component, a shell simulation component, and a sleeve. The clamping component presses the shell simulation component together, and the inlet component provides an inlet channel for liquid flow. The inlet pipe, upper flange, upper shell, and sleeve are all provided with sequentially connected liquid flow channels to simulate the actual working environment of the eddy current generator. The liquid flow pressure is accurately obtained at the pressure measurement channel. Based on this liquid testing fixture, the true performance of the eddy current generator can be obtained intuitively and accurately, providing a theoretical basis for practical use.

[0020] 2. The liquid testing fixture of the present invention has a measuring step on the side of the lower shell, and there is a gap between the lower end of the upper shell and the measuring step. This gap can be adjusted according to the actual testing requirements to ensure that the test product is not squeezed and deformed.

[0021] 3. The upper flange, upper shell, lower shell and lower flange of the present invention adopt a step-by-step insertion limiting connection to ensure circumferential concentricity during the installation of the liquid testing fixture; at the same time, in conjunction with the first sealing element and the second sealing element, the sealing of the liquid flow channel is ensured, and the liquid flow is ensured to enter and exit the product from top to bottom.

[0022] 4. The liquid testing fixture of the present invention has a reasonable and compact overall structure design, simulates the working environment of the eddy current generator, has a simple structure design, and meets the test requirements. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of an embodiment of the liquid testing fixture for the vortex generator inside the ignition nozzle of the engine thrust chamber according to the present invention (water inlet not shown);

[0024] Figure 2 This is a schematic diagram of the housing simulation component after assembling the tested vortex generator and sleeve in an embodiment of the liquid test fixture for an engine thrust chamber ignition nozzle of the present invention.

[0025] Figure 3 This is a schematic diagram of the upper flange and inlet assembly structure in an embodiment of the liquid testing fixture for the vortex generator inside the ignition nozzle of the engine thrust chamber according to the present invention;

[0026] Figure 4 This is a schematic diagram of the lower flange assembly and fastener structure in an embodiment of the liquid testing fixture for the vortex generator inside the ignition nozzle of the engine thrust chamber according to the present invention.

[0027] The attached figures are labeled as follows:

[0028] 1-Inlet pipe, 11-Inlet nozzle, 2-Pressure testing channel, 21-Pressure testing nozzle, 3-Upper flange, 31-First annular groove, 32-First seal, 4-Sleeve, 5-Lower flange, 51-Annular boss, 52-Circular platform, 6-Fastener, 7-Upper housing, 71-Second annular groove, 72-Second seal, 8-Lower housing, 9-Tested vortex generator. Detailed Implementation

[0029] In this embodiment, the liquid test requirements for the eddy current generator are as follows: the liquid can only enter the product flow channel from the central hole of the upper housing of the ignition nozzle and flow out from top to bottom. Therefore, the liquid test fixture needs to simulate the actual working environment of the eddy current generator to ensure the correctness of the test conditions and improve the accuracy of the test data measurement.

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not intended to indicate or imply their relative importance.

[0031] like Figure 1As shown, the present invention provides a liquid testing fixture for a vortex generator inside the ignition nozzle of an engine thrust chamber. The liquid testing fixture simulates the actual working environment of the vortex generator and includes an inlet component, a clamping component, a housing simulation component, and a sleeve 4.

[0032] Combination Figure 1 and Figure 3 The imported components include an inlet pipe 1 and a pressure testing channel 2. The inlet pipe 1 has an inlet nozzle 11 at its inlet end, which is generally fixed by welding. The pressure testing channel 2 is located on the side wall of the inlet pipe 1 and is connected to the inlet pipe 1. The end of the pressure testing channel 2 away from the inlet pipe 1 has a pressure testing nozzle 21. One end of the pressure testing nozzle 21 is welded to the side wall of the pressure testing channel 2, and the other end is connected to an external pressure testing device for testing the pressure of the liquid flow.

[0033] Combination Figure 1 , Figure 3 and Figure 4 The clamping assembly includes an upper flange 3 and a lower flange 5, which are connected by fasteners 6. In this embodiment, the fasteners 6 are studs, and the number of studs is 3 or 4. The middle part of the stud is a smooth rod, and both ends are threaded. The upper flange 3 and the lower flange 5 are provided with threaded holes that match the threads of the studs. The upper end of the stud is threaded to the upper flange 3 and fastened from the lower end of the upper flange 3 with a nut. The lower end is threaded to the lower flange 5 and fixed by spot welding. To improve the stability of the liquid testing fixture during operation, this embodiment provides retaining rings at the connection between the upper end of the upper flange 3 and the stud, and at the connection between the upper end of the lower flange 5 and the stud, respectively, to prevent the stud from wobbling radially during operation.

[0034] The inlet pipe 1 is connected to the upper flange 3, typically by welding, providing an inlet channel for the liquid testing fixture. The inlet pipe 1 is sufficiently long to ensure the stability of the inlet liquid flow. The pressure testing channel 2 is located close to the upper flange 3 to ensure the accuracy of pressure measurement. A first annular groove 31 is radially provided on the inner wall of the insertion point between the upper flange 3 and the upper housing 7. A first sealing element 32 is installed within the first annular groove 31 to ensure the sealing of the liquid testing fixture inlet.

[0035] The lower flange 5 supports the various components of the liquid testing fixture. It has multiple through holes circumferentially for securing it to the test bench with bolts. The lower end of the lower flange 5 also has an annular boss 51 to ensure its stable placement on the test bench. The annular boss 51 contains a concave circular platform 52. The thickness of the circular platform 52 is generally less than the thickness of the annular boss 51 to prevent deformation of the double-ended studs and to ensure that the horizontal contact surfaces of the upper flange 3, lower flange 5, and double-ended studs are parallel.

[0036] like Figure 1As shown, the fluid flow channel within the housing simulation component can be identical to that of the ignition nozzle product, thereby simulating the actual working environment of the vortex generator. The housing simulation component includes an upper housing 7 and a lower housing 8. The upper flange 3, upper housing 7, lower housing 8, and lower flange 5 are connected by a step-by-step insertion limiting connection to ensure circumferential concentricity of the tooling installation. The lower housing 8 has a receiving chamber and a fluid flow channel arranged from top to bottom. The sleeve 4 and the tested vortex generator 9 are located within the receiving chamber of the lower housing 8, thereby realizing the actual working environment of the tested vortex generator 9. That is, the inner diameter of the center hole of the upper flange 3 matches the outer diameter of the upper housing 7 for circumferential positioning; the inner diameter of the center hole of the lower flange 5 matches the outer diameter of the lower housing 8 for circumferential positioning as well.

[0037] The upper housing 7, sleeve 4, and tested vortex generator 9 are pressed together from top to bottom to simulate the state in which the tested vortex generator 9 is pressed and positioned inside the ignition nozzle. A measuring step is provided on the side of the lower housing 8, and a gap exists between the lower end of the upper housing 7 and the measuring step (i.e.,...). Figure 1 The gap size (L) is based on the actual design requirements of the ignition nozzle. During initial installation, the tested vortex generator 9 and sleeve 4 should be placed sequentially inside the lower housing 8, and then the upper housing 7 should be pressed onto the lower housing 8. Next, the lower end of the double-ended stud is fixed to the lower flange 5 by spot welding. After ensuring the gap size meets design requirements, the relative position of the upper end of the double-ended stud and the upper flange 3 is adjusted to ensure the product is not damaged or deformed. Subsequent installation / disassembly only requires adjusting the connection between the upper end of the double-ended stud and the upper flange 3 with a nut, thus simplifying subsequent installation steps and improving the efficiency of liquid testing fixture installation and disassembly. Fine-tuning of the gap can be achieved by adjusting the relative position of the upper flange 3 and the upper housing 7, and measuring with a feeler gauge to ensure the gap meets design requirements. Afterward, the upper flange 3 is tightened to the upper end of the double-ended stud.

[0038] In this embodiment, the inlet pipe 1, upper flange 3, upper shell 7, and sleeve 4 are all provided with a central channel that is connected in sequence. The central channel is the liquid flow channel, which is the same as the channel environment in which the tested eddy current generator 9 actually operates, thereby achieving a high degree of reproduction of the real working conditions and improving the accuracy of the test results. At the same time, the height and thickness of all components are designed to match each other, truly reproducing the actual working environment and working conditions of the tested eddy current generator 9.

[0039] A second annular groove 71 is provided radially on the inner wall of the lower side of the upper shell 7 where it is inserted into the lower shell 8. A second sealing element 72 is provided in the second annular groove 71 to ensure the sealing of the lower end of the shell simulation component, prevent leakage of liquid flow during the test, and ensure that the liquid flow entering through the inlet pipe 1 enters and exits the product from top to bottom.

[0040] The liquid testing method of the present invention uses the above-mentioned liquid testing fixture for the vortex generator inside the ignition nozzle of the engine thrust chamber and the pressure measuring device connected to the liquid testing fixture. The liquid testing method is as follows: the liquid testing fixture is assembled from bottom to top, and the pressure measuring device is connected to the pressure measuring nozzle on the pressure measuring channel. The liquid flow is introduced from the inlet nozzle of the inlet pipe 1, and reaches the vortex generator under test 9 through the liquid flow channel. The liquid flow pressure is obtained in real time through the pressure measuring device. At the same time, when the inlet pressure is stable, the liquid flow rate can also be measured, thereby obtaining the true performance of the vortex generator and providing a theoretical basis for actual working conditions.

[0041] This invention designs a liquid testing fixture for vortex generators to simulate the actual assembly state of the product and obtain the performance parameters of the vortex generator through testing. The fixture has a reasonable and compact overall structure, and the structural design has been verified through multiple model tests, demonstrating that the design structure is reasonable and meets the liquid testing requirements of the product. It has been widely applied in the liquid flow fixture for thrust chamber nozzles.

[0042] Although embodiments of the present invention have been shown and described above, those skilled in the art should consider any variations and modifications of the above embodiments that fall within the scope of the present invention's spirit and essence to be within the protection scope of the present invention.

Claims

1. A liquid testing fixture for a vortex generator inside an ignition nozzle in an engine thrust chamber, characterized in that: Including imported components, clamping components, housing simulation parts and sleeves (4); The inlet component includes an inlet pipe (1) and a pressure measuring channel (2). The pressure measuring channel (2) is located on the side wall of the inlet pipe (1) and is connected to the inlet pipe (1). The end of the pressure measuring channel (2) away from the inlet pipe (1) is connected to a pressure measuring device. The clamping assembly includes an upper flange (3) and a lower flange (5); the upper flange (3) and the lower flange (5) are connected by fasteners (6); the inlet pipe (1) is connected to the upper flange (3); The shell simulation component includes an upper shell (7) and a lower shell (8); the upper flange (3), upper shell (7), lower shell (8) and lower flange (5) are connected by a step-by-step insertion limiting connection; the lower shell (8) is provided with a receiving chamber and a liquid flow channel from top to bottom, and the sleeve (4) and the test vortex generator (9) are located in the receiving chamber of the lower shell (8); the upper shell (7), sleeve (4) and test vortex generator (9) are pressed together from top to bottom; the inlet pipe (1), upper flange (3), upper shell (7) and sleeve (4) are all provided with sequentially connected liquid flow channels; The lower housing (8) has a measuring step on its side, and there is a gap between the lower end of the upper housing (7) and the measuring step.

2. The liquid testing fixture for the vortex generator inside the ignition nozzle of an engine thrust chamber according to claim 1, characterized in that: The inner wall of the upper flange (3) and the upper housing (7) is provided with a first annular groove (31) along the radial direction, and a first sealing element (32) is provided in the first annular groove (31). The inner wall of the lower side of the upper housing (7) where it is inserted into the lower housing (8) is provided with a second annular groove (71) along the radial direction, and a second sealing element (72) is provided in the second annular groove (71).

3. The liquid testing fixture for the vortex generator inside the ignition nozzle of an engine thrust chamber according to claim 2, characterized in that: The lower flange (5) is provided with an annular boss (51) at its lower end. The annular boss (51) is provided with an upwardly recessed circular platform (52). The circular platform (52) is used to prevent the lower end face of the fastener (6) from contacting the test bench surface during installation.

4. The liquid testing fixture for the vortex generator inside the ignition nozzle of an engine thrust chamber according to claim 3, characterized in that: The fastener (6) is a double-ended stud, the upper end of which is threaded to the upper flange (3), and the lower end is threaded to the lower flange (5) and fixed by spot welding.

5. The liquid testing fixture for the vortex generator inside the ignition nozzle of an engine thrust chamber according to claim 4, characterized in that: The number of double-ended studs is three or four, and they are evenly distributed around the circumference of the shell simulation component.

6. The liquid testing fixture for the vortex generator inside the ignition nozzle of an engine thrust chamber according to any one of claims 1-5, characterized in that: The inlet pipe (1) is provided with a water inlet nozzle (11); the pressure measuring channel (2) is provided with a pressure measuring nozzle (21), one end of the pressure measuring nozzle (21) is connected to the pressure measuring channel, and the other end is connected to the pressure measuring device.

7. The liquid testing fixture for the vortex generator inside the ignition nozzle of an engine thrust chamber according to claim 6, characterized in that: The lower flange (5) has multiple through holes in its circumference for fixing the lower flange (5) to the test bench with bolts.

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