Armored thermocouple sealing and position control device for rocket motor

Abstract

The invention discloses a device suitable for sealing and position control of armored thermocouples of rocket engines, which comprises a casing for fixed installation on the shell of the combustion chamber of the rocket engine, and a connecting part is arranged at the rear end thereof; There is a hole screw rod, the other end of the hole screw rod is threadedly connected with a second nut, the hole screw rod is covered with a first nut and a gasket, and the gasket is located between the connecting part and the first nut, A closure is also provided between the second nut and the hole screw; the casing and the hole screw are coaxial, and the inside of the hole screw is provided with a through hole along its axial direction, and the closure has a through hole. The inner through hole of the tube, the inner through hole of the hole screw, the through hole of the closure and the inner hole of the second nut jointly form the accommodation space for the armored thermocouple, and the working end of the armored thermocouple is located at the front end of the casing , The free end is located at the rear end of the second nut; the present invention can simultaneously solve the sealing and adjustability problems of installing the armored thermocouple on the shell of the rocket engine combustion chamber.

Description

【Technical field】 [0001] The invention belongs to the technical field of aerospace temperature testing, and in particular relates to a sealing and position control device for armored thermocouples of rocket engines. 【Background technique】 [0002] Thermocouples have always been a common method of temperature measurement. With the improvement of the quality of thermocouples and the development of the demand for temperature measurement of the engine wall, the use of armored thermocouples to accurately measure the temperature of the wall of the rocket engine has become a current hot spot. The installation of the armored thermocouple involved mainly has the following three methods: copper bead sealing method, adhesive method and thread installation method. [0003] Copper bead sealing method: The copper bead sealing method is mainly to deform by extruding copper beads (or other deformable parts processed by variable materials), so as to achieve the sealing between the armored th...

AI Technical Summary

Problems solved by technology

The disadvantage is that once installed

The disadvantage is that the processing is more complicated, and once it is processed, the position of the thermocouple head should not be adjusted

[0006] In summary, although the thermocouples can be installed on the wall of the rocket engine through the above three methods, the copper bead sealing method has poor repeatability, it is difficult to accurately control the position of the head of the armored thermocouple, and the adhesive method is difficult to remove and cannot cope with high temperature and high pressure. Environment, thread installation method is difficult to adjust the thermocouple position, and it is difficult to process a single thermocouple

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