A Multi-gunpowder Adaptive Tailstock Forward-throwing Technology Based on Pressure Difference Separation

doi:10.12382/bgxb.2024.0752

Abstract

Abstract:

The separation of tailstock from projectile and the forward-throwing of tailstock have become significant challenges in the unmanned development of breech-loading howitzers.These challenges are attributed to the influence factors such as artillery structure and charge form.However,there is a lack of available data for reference in this aspect of research.A multi-gunpowder adaptive tailstock forward-throwing technology based on pressure difference separation is proposed,and a tailstock structure suitable for multi-gunpowder launch is designed.The stable and unstable regions of the tailstock-and-projectile separation are analyzed through the establishment of internal ballistic model,gas flow model,tailstock detachment model and so on.And a strategy to adjust the stability domain by aperture is proposed.The universal law of the interaction among gas chamber pore,gas chamber pressure,and tailstock detachment position are summarized.And the relationship between parameters such as muzzle velocity and separation velocity of projectile are also analyzed in this process.The tailstock forward-throwing analysis of a howitzer is presented.The results indicate that the cross-section radius of shear pin should be less than 4.27mm,and the wall thickness of gas chamber should be greater than 6.16mm.The aperture radius for the tailstock forward-throwing should be in the range of 1.00mm-2.75mm,and the stable region ranging from 1.00mm to 1.80mm and the non-stable region ranging from 1.80mm to 2.75mm are divided by taking1.80mm as a boundary.The position of tailstock detachment varies more when the aperture radius is more central.The aforementioned research will establish a theoretical and technical foundation for the advancement of rear loading and unmanned technology for rear loading howitzers.

Key words: tailstock forward-throwing, small hole flow, interior ballistics, stable separation region

CLC Number:

TJ460

WANG Meng, LIN Wenqi, CUI Qingchun, HAN Xuanxuan. A Multi-gunpowder Adaptive Tailstock Forward-throwing Technology Based on Pressure Difference Separation[J]. Acta Armamentarii, 2025, 46(7): 240752-.

Figures/Tables 10

Fig.1 Schematic diagram of tailstock forward-throwing

Fig.2 Tailstock structure

Fig.3 Design process

Fig.4 Force analysis of claw

Fig.5 Schematic diagram of gas chamber inflation and deflation

Fig.6 The change law of key parameters of internal ballistics

Table 1 The maximum pressure inside the chamber,the muzzle pressure and the muzzle velocity of projectile achieved by different gunpowders

药号	最大压强/MPa	炮口压强/MPa	弹丸初速/(m·s^-1)
1#	37.5	4.0	251.6
2#	54.6	5.1	292.7
3#	71.2	6.2	337.1
4#	88.5	7.1	356.2
5#	107.8	8.1	383.9
6#	111.6	19.1	510.5
7#	138.8	20.9	546.3
8#	157.5	21.4	558.7

Fig.7 p-t curves of #1-#8

Fig.8 Distribution of (non) stable regions for tailstock forward-throwing

Fig.9 Typical aperture tailstock detachment position

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