Artillery Arming Device Centrifugal Force Delay Mechanism
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Solution Overview
Problem
Artillery ammunition faces challenges in securing a sufficient safety distance before the muzzle of a gun, especially when fired at high rotational speeds, as existing mechanical safety and arming devices do not adequately delay detonation preparation, potentially leading to unsafe conditions.
Innovation Solution
A munitions safety and arming device for artillery ammunition that includes a body with a first and second movement path, a mass body, and a movement delay unit, which reduces centrifugal force through a cantilever mechanism to delay the mass body's movement, ensuring a safe distance is maintained before detonation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical safety and arming device is used in artillery ammunition, then the device can be operated mechanically without complex systems, but the detonation preparation occurs too quickly and sufficient safety distance cannot be secured
Solution Approach 1:
The mass body is pre-positioned in the first movement path and the slide member is pre-positioned in the second movement path. When centrifugal force acts on the mass body, it moves along the predetermined path to push the slide member, initiating the arming sequence in advance of detonation. This preliminary positioning and sequential movement ensures that safety distance is secured before detonation can occur.
Solution Approach 2:
The arming device is divided into distinct functional segments: the mass body that responds to centrifugal force, the first movement path that guides the mass body, the second movement path that guides the slide member, and the slide member that ultimately arms the detonation mechanism. This segmentation allows each component to perform its function at the appropriate time, creating a time-delayed arming sequence that ensures safety distance.
2Productivity
If the artillery ammunition is fired at high rotational speed, then the firing effectiveness is improved, but the mass body moves too quickly and safety distance cannot be secured
Solution Approach 1:
The device utilizes the dynamic centrifugal force generated by the rotation of the artillery ammunition during firing. The mass body is designed to move dynamically along the first movement path in response to the rotating centrifugal force, converting the rotational motion into linear motion that pushes the slide member along the second movement path. This dynamic response ensures the device adapts to high firing speeds while maintaining the safety delay.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device effectively delays the mass body's movement, securing a sufficient safety distance even at fast rotational speeds, and can be applied to both current military-use and future smart artillery ammunitions, providing a simple mechanical time delay solution.
Implementation Method 1
a mass body housed in the first movement path and moving from one side of the first movement path to the other side of the first movement path upon receiving centrifugal force based on rotation of an artillery ammunition when the artillery ammunition is fired
Data Source
AI summary
A munitions safety and arming device for artillery ammunition, and an artillery ammunition having the same are provided. The munitions safety and arming device for artillery ammunition includes: a body having a first movement path and a second movement path communicating with the first movement path; a mass body housed in the first movement path and moving from one side of the first movement path to the other side of the first movement path upon receiving centrifugal force based on rotation of an artillery ammunition when the artillery ammunition is fired; a slide member movably installed in the second movement path and slidably moving by a predetermined distance when pressed by the movement of the mass body; and a movement delay unit protruding from the first movement path to reduce the centrifugal force exerted on the mass body to delay a time for the mass body to move.