Airtight test device for spray pipe having convergent expansion structure
A technology of air tightness test and convergence expansion, applied in the direction of liquid/vacuum tightness measurement, etc., can solve problems such as air leakage, difficult for operators to seal, and inability to conduct effective tests.
Active Publication Date: 2019-05-14
BEIJING XINGJI RONGYAO SPACE TECH CO LTD
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Problems solved by technology
[0004] The convergent expansion structure part is located on the upper part of the entire nozzle. Due to the limited space, it is not easy for the operator to seal this part. Even if the sealing action can be realized, the sealing effect is not ideal, and it is easy to cause air leakage, making it impossible to carry out effective tests. Bring great trouble to the delivery of the whole product
Method used
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Embodiment 1
[0031] See also figure 1 , figure 2 with image 3 , figure 1 A top-view schematic diagram of an airtight test device provided in an embodiment of the present invention; figure 2 Provided for the embodiment of the present invention figure 1 A schematic diagram of section A-A of ; image 3 It is a schematic structural diagram of an airtight test device provided by an embodiment of the present invention. This embodiment provides an airtight test device for a nozzle with a convergent expansion structure. The airtight test device includes a support body 2, a support block assembly 4, a connecting rod assembly 6, and a two-way nut 9. The support block assembly 4 includes The first support block 41 and the second support block 42, the connecting rod assembly 6 includes a first connecting rod 61 and a second connecting rod 62, wherein:
[0032] The support body 2 passes the gas to be tested for air tightness into the nozzle, and the profile of the support body 2 must be the sa...
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The invention relates to an airtight test device for a spray pipe having a convergent expansion structure. The airtight test device comprises a support body, a support block assembly, a connecting rodassembly and a bidirectional nut; the support block assembly comprises a first support block and a second support block; the connecting rod assembly comprises a first connecting rod and a second connecting rod, wherein the first end face of the support body is rotatably connected with both the first end of the first support block and the first end of the second support block; the second end of the first support block is rotatably connected with the first end of the first connecting rod; the second end of the second support block is rotatably connected with the first end of the second connecting rod; and the second end of the first connecting rod and the second end of the second connecting rod are connected through the bidirectional nut. The airtight test device in the invention comprisesthe support body, the support block assembly, the connecting rod assembly and the bidirectional nut; therefore, the problem that the airtight test of the spray pipe having the convergent expansion structure cannot be sealed reliably and conveniently is solved; and the airtight test of an engine of the spray pipe having the convergent expansion structure can be effectively carried out.
Description
technical field [0001] The invention relates to the technical field of airtightness testing, in particular to an airtightness testing device for a nozzle with a convergent and expanding structure. Background technique [0002] Rocket engine (rocket engine) is a jet engine that does not use external air by the aircraft's own propellant (energy). It can work in the space outside the dense atmosphere, and the energy is converted into the kinetic energy of the working fluid (working medium) in the rocket engine, forming a high-speed jet to be discharged to generate thrust. The nozzle is an important component of the rocket engine. [0003] At present, for some nozzles with convergent expansion structures, such as liquid rocket engine nozzles and orbit control liquid engine nozzles, after installation, an airtight test is required to check whether the performance of the entire product meets the design requirements. [0004] The convergent expansion structure part is located on ...
Claims
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IPC IPC(8): G01M3/02
Inventor 不公告发明人
Owner BEIJING XINGJI RONGYAO SPACE TECH CO LTD