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A monitoring device for positive/shear stress at bonding interface of solid rocket motor

A technology of solid rockets and monitoring devices, which is applied in the direction of measuring devices, measuring forces, instruments, etc., can solve problems such as debonding monitoring of the bonding interface of solid motors, and achieve the effect of strong adaptability

Active Publication Date: 2022-05-03
内蒙动力机械研究所
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Problems solved by technology

[0007] The invention provides a monitoring device for the positive / shear stress of the bonding interface of a solid rocket motor to solve the problem of monitoring the debonding of the bonding interface of a solid rocket motor

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  • A monitoring device for positive/shear stress at bonding interface of solid rocket motor
  • A monitoring device for positive/shear stress at bonding interface of solid rocket motor
  • A monitoring device for positive/shear stress at bonding interface of solid rocket motor

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] A monitoring device for the normal / shear stress of the solid rocket motor bonding interface of the present invention includes a normal / shear stress sensor as the core, combined with the sensor embedding method, process, wire lead-out, flange plate design, sensor layout and other content.

[0038] The present invention is based on the structural layout of a typical solid rocket motor, wherein: the interface stress sensing element adopts a capacitive sensor 7 that can realize simultaneous monitoring of normal shear stress. Layer thickness and shell material are mainly divided into three types of implantation methods, such as Figure 6-8 As shown, the sensor 7 and the data acquisition instrument 19 are connected by a weather-resistant ultra-thin wire, and the wiring method is divided into two ways: the wiring under the lining layer 11 and the wiring...

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Abstract

The invention relates to a monitoring device for the normal / shear stress of the bonding interface of a solid rocket motor, which includes a sensor, a data acquisition instrument and a host PC, and the sensors are arranged at most 8 sensors on the monitoring section of the bonding interface of each solid rocket motor. The angle between two adjacent sensors is 45 degrees, the distance between the monitoring sections of the straight section of the solid rocket motor is 30‑50CM, and one monitor is arranged at the opening position of the artificial debonding layer of the front and rear heads of the solid rocket motor Cross-section, a monitoring section is arranged in the middle of the front and rear heads of the solid rocket motor; the data acquisition instrument is attached to the surface of the solid motor shell, and the sensor, data acquisition instrument and the upper PC are connected through wires or communication modules. The present invention can be distributed and embedded in the straight cylinder section and the head section of the solid engine to arrange a plurality of monitoring sections to realize the stress monitoring of the bonding interface between the charge column and the heat insulating layer at multiple positions, and obtain the stress field distribution of the bonding interface.

Description

technical field [0001] The invention relates to a monitoring device, in particular to a monitoring device for the normal / shear stress of the bonding interface of a solid rocket motor. Background technique [0002] The solid engine will be affected by various factors such as transportation load, gravity, and overturning during service, and the stress at the bonding interface between the grain and the thermal insulation layer will change accordingly. When the stress at the bonding interface is greater than that of the interface or Material strength, debonding occurs at the interface. The debonding defect of the bonding interface of solid motors accounts for about 1 / 3 of the faults of solid motors, which seriously affects the use and life of solid motors. Therefore, monitoring technology is used to monitor the stress at the bonding interface. Evaluation and other work is very necessary. [0003] Solid engines are long-term storage and special industrial products for one-time ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/14
CPCG01L1/148
Inventor 丁晓浩李树谦郭宇田伟于长艳
Owner 内蒙动力机械研究所
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