Injector hydraulic test clamping mechanism

Abstract

The utility model relates to the technical field of injector manufacturing, in particular to an injector hydraulic test clamping mechanism which comprises a base, a sealing element, a fastening element and a connector, the base is of a bowl-shaped structure with an opening formed in one end face, and an injector is fixedly connected to the opening of the base in an airtight mode through the fastening element. A sealing element is arranged between the injector and the base, a connector threaded connector communicated with the interior is arranged on the side face of the base, a connector is installed at the connector threaded connector, and the base is connected with a liquid injection opening of hydraulic detection equipment through the connector. According to the clamping mechanism for the hydraulic test of the injector, the traditional mode of partitioned test and repeated plugging and blockage removal is changed, the overall structure facilitates rapid assembly and connection of hydraulic detection equipment, the test preparation time is shortened, the hydraulic test of the injector can be efficiently completed, and the requirement for efficiency is met when the requirement for testing a large number of parts of the injector is met.

Description

Technical Field

[0001] This utility model relates to the field of injector manufacturing technology, and specifically to an injector hydraulic test clamping mechanism. Background Technology

[0002] Among the core components of the thrust chamber of aerospace liquid engines, the injector plays a crucial role. With the continuous development of aerospace technology, the performance requirements for the injector are also increasing, especially in terms of its hydraulic performance, which must ensure extremely high precision and stability.

[0003] Currently, my country has achieved phased success in additive manufacturing research of injectors, successfully producing and delivering injectors with approximately 140 components, such as... Figure 1 As shown, this demonstrates a strong capability in manufacturing complex structures; however, there are still many challenges and shortcomings in the hydraulic testing of the injector. Specifically, the current hydraulic testing of injectors mainly faces the following problems:

[0004] Low testing efficiency: Existing testing methods are inadequate for hydraulic testing of injectors containing 400-500 parts. Traditional testing methods usually require dividing the injector nozzle into sections, sealing the sections with materials such as wax and rubber, and then performing hydraulic tests on each section one by one. Finally, the data from all sections are collected to obtain the test results. This not only takes a long time to prepare, but also requires repeated removal of blockages, which seriously affects the testing efficiency.

[0005] Data instability: In traditional testing, the repeated sealing and opening of the nozzle can easily lead to liquid seepage, which can affect the accuracy of the test data. In addition, too many human factors, including equipment preparation time and parts handling time, can also cause instability in the test data, increasing the risk of data fluctuation.

[0006] Overall hydraulic uniformity testing is difficult: testing by region makes it difficult to comprehensively evaluate the overall hydraulic uniformity of the injector. Too many variables in different regions can easily interfere with the final results, leading to unstable test results.

[0007] Unstable assembly leads to data fluctuations: Unstable assembly between testing equipment and parts is also a significant factor causing fluctuations in test data. This not only affects the reliability of test results but may also have an adverse impact on subsequent part remediation and changes to new solutions.

[0008] The contradiction between production costs and efficiency: Existing testing methods are not only inefficient, but also require a lot of human and material resources, which increases production costs. At the same time, the long testing cycle also prolongs the product delivery cycle, which is not conducive to high-efficiency production.

[0009] Therefore, developing a clamping mechanism that can efficiently and stably complete the hydraulic testing of injectors is of great significance for improving the production efficiency of injectors, ensuring product quality, and reducing production costs. Summary of the Invention

[0010] To address the aforementioned issues, this utility model provides a hydraulic testing clamping mechanism for injectors. This mechanism changes the traditional method of partitioned testing and repeated sealing and clearing of blockages. The injector is airtightly fixed to the opening of the base via fastening elements. A threaded interface for the connector is provided on the side of the base, and a connector is installed to connect to the injection port of the hydraulic testing equipment. The overall structure facilitates quick assembly and connection of the hydraulic testing equipment, reducing test preparation time and enabling efficient completion of injector hydraulic testing, thus meeting the efficiency requirements when dealing with a large number of injector testing needs for components.

[0011] The technical solution of this utility model is as follows:

[0012] A hydraulic test clamping mechanism for an injector includes a base, a sealing element, a fastening element, and a connector. The base is a bowl-shaped structure with an opening on one end face. The injector is airtightly fixed to the opening of the base by the fastening element. A sealing element is provided between the injector and the base. A connector threaded interface communicating with the interior is provided on the side of the base. A connector is installed at the connector threaded interface. The base is connected to the injection port of the hydraulic testing equipment through the connector.

[0013] Fastening elements include screws.

[0014] The fastening element also includes a washer, which is placed between the screw and the injector.

[0015] The sealing element is a resilient gasket.

[0016] The sealing gasket is a polytetrafluoroethylene (PTFE) gasket.

[0017] The base also has positioning screw holes on its side for fixed connection with hydraulic testing equipment.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. This utility model discloses a hydraulic testing clamping mechanism for injectors. This hydraulic testing clamping mechanism changes the traditional method of partitioned testing and repeated sealing and clearing of blockages. The injector is airtightly fixed to the opening of the base by fastening elements. The side of the base is provided with a threaded interface for the connector and the connector is connected to the injection port of the hydraulic testing equipment. The overall structure facilitates quick assembly and connection of the hydraulic testing equipment, reduces test preparation time, and can efficiently complete the hydraulic testing of the injector, meeting the efficiency requirements when facing the testing needs of a large number of injectors for parts.

[0020] 2. The present invention discloses a hydraulic test clamping mechanism for an injector. This hydraulic test clamping mechanism avoids the problem of liquid leakage caused by repeated sealing and opening of the nozzle in traditional testing, reduces the impact of human operation factors (such as equipment preparation, parts handling, etc.) on the test, reduces the risk of data fluctuation, and thus ensures the accuracy of test data.

[0021] 3. The present invention discloses a hydraulic testing clamping mechanism for an injector. This injector hydraulic testing clamping mechanism adopts an overall clamping test method instead of segmented testing, which reduces the interference of variables in different area tests and can more comprehensively and accurately evaluate the overall hydraulic uniformity of the injector, making the test results more stable and reliable.

[0022] 4. The present invention discloses a hydraulic test clamping mechanism for an injector. Through reasonable structural design, such as setting a sealing element between the base and the injector to ensure airtightness, and setting a positioning screw hole on the side of the base for fixed connection with the hydraulic testing equipment, the hydraulic test clamping mechanism enhances the assembly stability between the testing equipment and the parts, improves the reliability of the test results, and is beneficial for subsequent part repair and new scheme modification.

[0023] 5. The present invention discloses a hydraulic test clamping mechanism for injectors, which improves testing efficiency, reduces the input of manpower and material resources, shortens the testing cycle, thereby reducing production costs, and at the same time helps to shorten the product delivery cycle and achieve high-efficiency production. Attached Figure Description

[0024] The advantages and solutions of this application will become clear to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this invention.

[0025] In the attached diagram:

[0026] Figure 1 A three-dimensional structural diagram of the injector;

[0027] Figure 2 This is a three-dimensional structural diagram of a hydraulic test clamping mechanism for an injector according to an embodiment of the present utility model;

[0028] Figure 3 This is a cross-sectional structural schematic diagram of a hydraulic test clamping mechanism for an injector according to an embodiment of the present utility model;

[0029] Figure 4 This is a front view of a hydraulic test clamping mechanism for an injector after assembly with an injector, according to an embodiment of this utility model.

[0030] Figure 5 This is a top view of a hydraulic test clamping mechanism for an injector after assembly with an injector, according to an embodiment of this utility model.

[0031] Figure 6 This is a three-dimensional structural diagram of a hydraulic testing clamping mechanism for an injector and an injector after assembly, according to an embodiment of the present invention.

[0032] The components represented by the various reference numerals in the diagram are:

[0033] This utility model comprises: 1. base, 2. sealing gasket, 3. screw, 4. washer, 5. threaded connector, 6. connector, 7. injector, and 8. positioning screw hole. Detailed Implementation

[0034] like Figure 2 and Figure 3 As shown, the hydraulic test clamping mechanism for the injector mainly consists of a base 1, a sealing gasket 2, a hexagonal head screw 3, an M16 screw washer 4, a medium-pressure sealed connector 6, and a positioning screw hole 8. It aims to solve the problems of low efficiency and unstable data in the hydraulic testing of multi-component injectors, and to achieve the function of obtaining stable data in a single hydraulic test. It is applicable to the research and development of injectors, core components of aerospace liquid engine thrust chambers, in the field of additive manufacturing technology.

[0035] The base 1 has a bowl-shaped structure with an open top surface, serving as the assembly surface for the injector 7. Screw holes are evenly distributed on its top flange, corresponding in number and position to those on the injector 7, for assembly. The side wall of the base 1 has a threaded connector 5 and positioning screw holes 8. The threaded connector 5 is used to install the medium-pressure sealing connector 6, and the positioning screw holes 8 are used to connect to the hydraulic testing equipment via positioning bolts, ensuring the stability of the clamping mechanism and part position during testing. The bowl-shaped structure provides suitable assembly space for the injector 7, and the screw holes on the top flange facilitate accurate connection with the injector 7, ensuring assembly stability. The cooperation between the threaded connector 5 on the side wall and the medium-pressure sealing connector 6 connects the internal cavity of the base 1 to the injection port of the hydraulic testing equipment, providing a channel for hydraulic testing. The positioning screw holes 8 ensure that the clamping mechanism and hydraulic testing equipment remain in fixed positions during testing, avoiding fluctuations in test data due to position changes and improving testing accuracy.

[0036] The sealing gasket 2 is made of flexible material, specifically a ring-shaped polytetrafluoroethylene plate, with a shape consistent with the upper surface of the base 1. Its top has a screw hole for a hexagonal head screw 3 to pass through. The number and position of these screw holes correspond to the screw holes on the injector 7. The sealing gasket 2 is positioned between the upper surface of the base 1 and the bottom surface of the injector 7, serving a sealing and buffering function. The flexible sealing gasket 2 acts as a buffer during assembly with the injector 7, preventing damage to the finished parts and protecting the surface quality of the injector 7. Simultaneously, its excellent sealing performance ensures airtightness during testing, preventing liquid leakage during hydraulic testing and ensuring the accuracy of the test data.

[0037] The hexagonal head screws 3 are used to fix the sealing gasket 2 to the bottom surface of the injector 7. Their quantity and size can be selected according to actual needs to meet the assembly requirements of different specifications of injectors 7. The connection between the hexagonal head screws 3 and the sealing gasket 2 is made by the washer 4 of the M16 screw. Through the connection of the hexagonal head screws 3, the sealing gasket 2, the injector 7 and the base 1 are tightly fixed together, ensuring the firmness of the assembly. The selectable quantity and size make the clamping mechanism have a certain degree of versatility and can adapt to the hydraulic testing needs of different models of injectors 7.

[0038] The washer 4 of the M16 screw is placed between the screw 3 with the internal hexagonal head and the injector 7, separating the metal internal hexagonal head screw 3 from the injector 7; the washer 4 of the M16 screw can effectively prevent the metal internal hexagonal head screw 3 from directly contacting the injector 7, preventing damage to the injector 7 during assembly, and further protecting the quality of the injector 7.

[0039] The medium-pressure sealed connector 6 is connected to the base 1 via threads on the side wall of the base 1, and is also connected to the injection port of the hydraulic testing equipment via threads on the interface. The medium-pressure sealed connector 6 achieves a safe and reliable connection between the internal cavity of the base 1 and the injection port of the hydraulic testing equipment, ensuring the normal flow of liquid during the hydraulic testing process, and has good sealing performance to prevent liquid leakage from affecting the test results.

[0040] The positioning screw holes 8 are formed on the side wall of the base 1. The number and size are determined according to the hydraulic testing equipment used. The positioning screw holes 8 are connected to the hydraulic testing equipment through positioning bolts, which can ensure the stability of the clamping mechanism and the hydraulic testing equipment during the testing process, avoid inaccurate test data due to the shaking or displacement of the clamping mechanism, and improve the stability and reliability of the test.

[0041] Please combine Figures 4 to 6 The working process of the hydraulic test clamping mechanism of the injector is as follows:

[0042] Initial preparation: Initially, fix base 1 to the hydraulic testing equipment using positioning screws to ensure the stability of base 1. At the same time, place sealing gasket 2 on the upper surface of base 1, making sealing gasket 2 coincide with the upper plane of base 1;

[0043] Assemble the spray nozzle: Place the spray nozzle 7 on the sealing gasket 2, aligning the screw holes on the spray nozzle 7 with the screw holes on the sealing gasket 2 and the base 1. Then, fix the sealing gasket 2 to the bottom surface of the spray nozzle 7 using the hexagon socket head cap screw 3. Place the M16 screw washer 4 at the connection between the hexagon socket head cap screw 3 and the sealing gasket 2, and tighten the hexagon socket head cap screw 3 to complete the assembly of the spray nozzle 7, sealing gasket 2 and base 1.

[0044] Connecting the hydraulic testing equipment: Install the medium-pressure sealed connector 6 onto the base 1 through the thread on the side wall of the base 1, and then connect the injection port of the hydraulic testing equipment to the medium-pressure sealed connector 6 through the thread to ensure a tight connection and no leakage;

[0045] Hydraulic testing: Place the assembled injector 7 and auxiliary injector hydraulic test clamping mechanism into the explosion-proof box, fill the chamber with water, and seal the vent after water comes out of the exhaust port of the part. Then, start the testing equipment to pressurize. According to the requirements of the part, increase the pressure of the connected hydraulic pipeline to the required parameters of the part. After the pressure stabilization time is met, the hydraulic parameters of the part can be measured.

[0046] Disassembly and Replacement: After the test is completed, disconnect the injection line of the test equipment from the medium-pressure sealed connector 6, remove the hexagonal head screw 3 on the injector 7, replace the next injector 7, and retighten the hexagonal head screw 3 and the injection line of the test equipment. This completes one work cycle, and the hydraulic test of the next injector 7 can continue.

Claims

1. An injector hydraulic test chucking mechanism characterized by, The device comprises a base (1), a sealing element, a fastening element and a joint (6), the base (1) is in the form of a bowl with an opening at one end face, an injector (7) is fixedly connected at the opening of the base (1) in airtight manner by the fastening element, the sealing element is arranged between the injector (7) and the base (1), a joint threaded interface (5) is arranged on the side face of the base (1) and communicates with the inside, the joint (6) is installed at the joint threaded interface (5), and the base (1) is connected with a liquid injection port of a hydraulic detection device through the joint (6).

2. The hydraulic test clamping mechanism for an injector according to claim 1, wherein The fastening element comprises a screw (3).

3. The hydraulic test collet chuck of claim 2 wherein, The fastening element further comprises a gasket (4) arranged between the screw (3) and the injector (7).

4. The hydraulic test clamping mechanism for an injector of claim 1, wherein, The sealing element is a sealing gasket (2) with elasticity.

5. The hydraulic test collet chuck of claim 4 wherein, The sealing gasket (2) is a polytetrafluoroethylene gasket.

6. The hydraulic test fixture of claim 1, wherein, The side face of the base (1) is further provided with a positioning screw hole (8) for fixed connection with the hydraulic detection device.

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