CN103644046B - A kind of solid propellant rocket motor charge Grain structure - Google Patents

Abstract

The present invention relates to a kind of solid propellant rocket motor charge Grain structure, belong to Solid Rocket Motor Technology field.The present invention is under the condition that design restricted boundary is certain, when total groove depth equal or exceed 0.8 times of powder column outer radius, powder column diameter of inner pipe be less than or equal to 0.25 times of powder column external diameter, by the coordinative role of Trapezoidal slot part, under the prerequisite ensureing charge constitution integrity, can significantly subtract tube diameter and groove width, thus improve the filling ratio of the solid propellant rocket motor charge firing chamber adopting these Types of Medicine, reach the object improving this overall performance of solid propellant rocket volume energy density.

Description

A kind of solid propellant rocket motor charge Grain structure

Technical field

The present invention relates to Solid Rocket Motor Technology field, be specifically related to a kind of solid propellant rocket motor charge Grain structure.

Background technique

Solid propellant rocket is the power plant that weaponry is widely applied, one of key technology of the structural design solid propellant rocket of powder column.In the engineer applied process of solid propellant rocket decades, have accumulated a large amount of relevant design technology.

Tube seat Types of Medicine are Grain structures that slenderness ratio is comparatively large, the more stable solid propellant rocket of combustion face Changing Pattern requirement is conventional, the typical structure of fluting such as its width such as grade 101 is shown in Fig. 1, realizes the combustion face of expection with the thick Changing Pattern of meat by the structural parameter such as number, tube seat transition flume structure size optimizing groove.

Types of Medicine structure shown in Fig. 1 is applied on a large amount of solid propellant rocket, but owing to being subject to the restriction of charge constitution integrity analysis technological means, in the long period that these Types of Medicine are applied in engineering, be all the degree of depth of cross-notching in engineering practice, the structural parameter such as the angle of width, transition skewed slot carry out taking turns Experience Design, then according to the trial-production of product and test result, these structural parameter are adjusted.Particularly in order to ensure the charge constitution integrity at transition skewed slot position, and the measure taked suitably to add bassoon diameter, increase groove width, under the condition that burning chamber shell size is certain, be unfavorable for the filling ratio improving powder charge firing chamber, bring certain resistance to raising solid propellant rocket overall performance.

Summary of the invention

(1) technical problem that will solve

The technical problem to be solved in the present invention is: how to provide a kind of solid propellant rocket motor charge Grain structure, to improve the filling ratio of the solid propellant rocket motor charge firing chamber adopting these Types of Medicine, thus improves solid propellant rocket volume energy density.

(2) technological scheme

In order to solve the problems of the technologies described above, the invention provides a kind of solid propellant rocket motor charge Grain structure, comprise pipe and Trapezoidal groove in interconnective powder charge powder column, described Trapezoidal groove comprise interconnective Trapezoidal part and etc. width segments, the inner side of the width segments such as described Trapezoidal part is positioned at, the diameter d of pipe, total groove depth H of described Trapezoidal groove in powder charge powder column outer diameter D, described powder charge powder column, and the pass between the groove depth H1 of described Trapezoidal part is:

$H1=0.8\×H\×\frac{D-d}{D};$

And the subtended angle of described Trapezoidal part gets 10 ° ~ 16 °, H1/H is larger, and described subtended angle value is less, and the less described subtended angle value of H1/H is larger.

Preferably, described total groove depth H is more than or equal to 0.8 times of powder charge powder column outer radius D/2, and in powder charge powder column, the diameter d of pipe is less than or equal to 0.25 times of powder charge powder column outer diameter D.

Preferably, in described powder charge powder column, pipe is connected by transition skewed slot with Trapezoidal groove.

(3) beneficial effect

The present invention is under the condition that design restricted boundary is certain, when total groove depth equal or exceed 0.8 times of powder column outer radius, powder column diameter of inner pipe be less than or equal to 0.25 times of powder column external diameter, by the coordinative role of Trapezoidal slot part, under the prerequisite ensureing charge constitution integrity, can significantly reduce diameter of inner pipe and groove width, thus improve the filling ratio of the solid propellant rocket motor charge firing chamber adopting these Types of Medicine, reach the object improving this overall performance of solid propellant rocket volume energy density.

Accompanying drawing explanation

Fig. 1 is the sectional view of the slotted section of traditional solid propellant rocket tube seat Types of Medicine;

Fig. 2 is sectional view of the present invention;

Fig. 3 is the sectional view of Trapezoidal slot part of the present invention.

Wherein, width is waited to slot 101; Pipe-1 in powder charge powder column; Trapezoidal groove-2; Transition skewed slot-3.

Embodiment

For making object of the present invention, content and advantage clearly, below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.

By finite element analysis, under employing tradition waits width slotted-tube groove Types of Medicine condition, the focus of charge constitution Completeness Design on transition skewed slot, and is waiting under width channel-shaped state, and the part ess-strain that diameter is less is larger.For this problem, for improving the filling ratio of powder charge, Fig. 2 is shown in by the Trapezoidal barrel groove Types of Medicine general structure schematic diagram of proposition of the present invention, comprise pipe 1 and Trapezoidal groove 2 in interconnective powder charge powder column, in described powder charge powder column, pipe 1 is connected by transition skewed slot 3 with Trapezoidal groove 2, (Fig. 3 is the figure of the formation viewed from the left side from the right of Fig. 2 to this Trapezoidal groove 2 as shown in Figure 3, wherein O is the center of circle), described Trapezoidal groove 2 comprise interconnective Trapezoidal part and etc. width segments, the inner side of the width segments such as described Trapezoidal part is positioned at, wherein, powder charge powder column outer diameter D, the diameter d of pipe in described powder charge powder column, total groove depth H of described Trapezoidal groove, and the pass between the groove depth H1 of described Trapezoidal part is:

$H1=0.8\×H\×\frac{D-d}{d};$

And the subtended angle of described Trapezoidal part gets 10 ° ~ 16 °, H1/H is larger, and described subtended angle value is less, and the less described subtended angle value of H1/H is larger.

Described total groove depth H is more than or equal to 0.8 times of powder charge powder column outer radius D/2, and in powder charge powder column, the diameter d of pipe is less than or equal to 0.25 times of powder charge powder column outer diameter D.

Verify by finite element tool, can prove, the present invention is under the condition that design restricted boundary is certain, 0.8 times of powder column outer radius is equaled or exceeded at total groove depth, when powder column diameter of inner pipe is less than or equal to 0.25 times of powder column external diameter, by the coordinative role of Trapezoidal slot part, under the prerequisite ensureing charge constitution integrity, can significantly reduce diameter of inner pipe and groove width, thus improve the filling ratio of the solid propellant rocket motor charge firing chamber adopting these Types of Medicine, reach the object improving this overall performance of solid propellant rocket volume energy density.

The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.

Claims (3)

1. a solid propellant rocket motor charge Grain structure, it is characterized in that, comprise pipe (1) and Trapezoidal groove (2) in interconnective powder charge powder column, described Trapezoidal groove (2) comprise interconnective Trapezoidal part and etc. width segments, the radially inner side of the width segments such as described Trapezoidal part is positioned at, the pipe diameter d of (1), total groove depth H of described Trapezoidal groove (2) in powder charge powder column outer diameter D, described powder charge powder column, and the pass between the groove depth H1 of described Trapezoidal part is:

$H1=0.8\×H\×\frac{D-d}{D};$

And the subtended angle of described Trapezoidal part gets 10 ° ~ 16 °, H1/H is larger, and described subtended angle value is less, and the less described subtended angle value of H1/H is larger.

2. solid propellant rocket motor charge Grain structure as claimed in claim 1, it is characterized in that, described total groove depth H is more than or equal to 0.8 times of powder charge powder column outer radius D/2, and in powder charge powder column, the diameter d of pipe (1) is less than or equal to 0.25 times of powder charge powder column outer diameter D.

3. solid propellant rocket motor charge Grain structure as claimed in claim 1 or 2, is characterized in that, in described powder charge powder column, pipe (1) is connected by transition skewed slot (3) with Trapezoidal groove (2).