Weapon system consisting of multi-segment barrel and fluid-driven spinning projectile, and method

Abstract

The present invention relates to a multi-section barrel, fluid-propelled spinning ammunition, as well as a weapon system formed by them. The multi-section barrel adjusts the interaction between barrel and projectile through barrel shape to improve range and precision; the fluid propels the self-selected projectile to guide the fluid through and twist the projectile by arranging volute holes or volute grooves at the rear or tail of the projectile, so that the projectile forms spin through the action of the fluid without relying on rifling; the projectile can be used in combination with multi-section barrel, which can improve performance and reduce cost simultaneously.

What is claimed is: 
     
         1 . A fluid-propelled spinning projectile, characterized by comprising volute holes symmetrically or evenly arranged around the projectile or the axis of projectile core at the rear or tail of projectile or projectile seat, and the said volute holes include through hole and blind hole. 
     
     
         2 . The fluid-propelled spinning projectile in  claim 1 , characterized in that: passive armor layer and steel core may be made of pure steel projectile, and if pure steel projectile is adopted, part or all of the said pure steel projectile will be treated, including one or more of heat treatment, coating and cladding. 
     
     
         3 . The fluid-propelled spinning projectile in  claim 1 , characterized in that the volute through hole or volute blind hole of the said fluid-propelled spinning projectile is one or more of volute groove, volute through hole or volute blind hole. 
     
     
         4 . The fluid-propelled spinning projectile in  claim 1 , characterized in that one or more bearing bands or bulges similar to bearing bands are arranged on the surface of projectile around the axis of the projectile, and the said volute groove or volute hole is at the rear of the said bearing band or bulge or passes under part or all of the said bearing bands or bulges. 
     
     
         5 . The fluid-propelled spinning projectile in  claim 4 , characterized in that the said volute groove or volute hole is blocked by squeezing bearing band in the said volute groove or volute through holes; after the said bearing band restores its original state, the said volute grooves or volute through holes are unobstructed and the fluid flows through the said volute grooves or volute through holes to propel the projectile forward or rotate. 
     
     
         6 . A multi-section barrel, characterized by comprising any two or all parts (A+B/C, A+B+C, B+C) of A, B and C sections, wherein the A, B and C sections are rifled bore barrels or smooth bore barrels, the said Section A forms a tight fit with part or all of the projectile used, including interference fit, the said Section C is larger than the said Section A in diameter and forms clearance fit with part or all of the said projectiles, and the said Section B gradually increases in diameter; when only the said Section B is included, the section curve of the said Section B is an arc or a specific curve. 
     
     
         7 . According to the multi-section barrel described in  claim 8 , it is characterized in that: a throat shrinkage section is followed after Section A or before Section B, and when only Section B is included after the throat shrinkage section, the section curve of Section B is one or more of step, oblique line, arc line, or specific curve. 
     
     
         8 . A fluid-propelled spinning projectile weapon system, characterized by comprising the said fluid-propelled spinning projectile of  claim 1  and a smooth bore or rifled bore barrel through which the said fluid-propelled spinning projectile is fired, and the said smooth bore or rifled bore barrel comprising a one-section barrel or a multi-section barrel. 
     
     
         9 . A weapon system using multi-section barrel and non-fluid-propelled spinning ammunition, characterized by comprising the said multi-section barrel of  claim 6  and non-fluid-propelled spinning ammunition of various calibers, and the said non-fluid-propelled spinning ammunition is fired through the said multi-section barrel. 
     
     
         10 . A method for stabilizing volute holes, characterized by comprising symmetrically or uniformly arranged volute through holes around the core axis of an object in a fluid or flow field; the posture of the said object in the fluid or flow field is stabilized by the action of fluid flowing through the said volute through holes, and there are 2 or more of the said volute through holes. 
     
     
         11 . The said stabilizing method based on  claim 10 , characterized by comprising a tail fin arranged on the said object. 
     
     
         12 . A fluid-propelled spin-stabilized cone-tail shelled projectile, including a projectile seat and a projectile core, characterized by comprising the tail of the said projectile core is a taper with a thick front and a thin rear, or a tapered frustum with a thick front and a thin rear; the said projectile seat is symmetrically or uniformly arranged around the axis of the projectile core, and the whole projectile seat is hollow or cup-shaped including a bottom-leaking cup-shaped one, and the hollow part of the bottom-leaking cup-shaped one is provided with a taper with a thick front and a thin rear corresponding to the tail of the projectile core; the said projectile seat is like a taper sleeve, which is sleeved on the projectile core from the rear to the front, and shelled to the rear of the projectile core after the projectile leaves the bore. 
     
     
         13 . The said fluid-propelled spin-stabilized cone-tail shelled projectile based on  claim 12 , including a projectile seat and a projectile core, characterized by comprising symmetrically arranged volute grooves or volute holes around the axis of the projectile core in the rear or tail of the projectile seat. 
     
     
         14 . The said fluid-propelled spin-stabilized cone-tail shelled projectile based on  claim 12 , characterized in that a binder, including an energetic binder, is disposed between the projectile seat and the projectile core, and the adhesive strength of the said binder will rapidly decrease or disappear at high temperatures. 
     
     
         15 . The said fluid-propelled spin-stabilized cone-tail shelled projectile based on  claim 14 , characterized in that: the bottom or/and the walls of the projectile seat are made of elastic materials. 
     
     
         16 . The said fluid-propelled spin-stabilized cone-tail shelled projectile based on  claim 15 , characterized by comprising a pit arranged at the bottom of the said projectile core, and a bulge which propels into the pit arranged at the bottom of the projectile seat. 
     
     
         17 . The said fluid-propelled spin-stabilized cone-tail shelled projectile based on  claim 16 , characterized in that the pit at the bottom of the said projectile core has a taper, and the bulge at the bottom of the projectile seat has a taper corresponding to the pit of the said projectile core; or guide keys and keyways or similar bulges and grooves are arranged on the surfaces of the bulges and pits; or the said pit and the bulge are processed into a cylindrical shape, and the pit and the bulge of the cylinder are provided with internal and external guide splines or similar structures, the said internal and external guide splines have limited relative movement along the axial direction, and can freely come out when moving backward along the axial direction; and there are air-leakage through holes or grooves on the bulges at the bottom of the said projectile seat mentioned above. 
     
     
         18 . The said fluid-propelled spin-stabilized cone-tail shelled projectile based on  claim 17 , characterized in that: there are two or more pits at the bottom of the said projectile core and bulges at the bottom of the projectile seat, which are uniformly or symmetrically arranged around the axis of the said projectile core, and each bulge at the bottom of the projectile seat corresponds to a pit at the bottom of the said projectile core, at which time the whole projectile seat is cup-shaped, bottom-leaking cup-shaped, pushpin-shaped, or provided with air-permeable through holes or grooves on the bulges at the bottom of the projectile seat.