A rotary-chamber multi-pulse solid rocket motor

Abstract

The present invention relates to a rotary-chamber multi-pulse solid rocket engine, comprising: a rotary chamber body having a plurality of combustion chambers for accommodating grain; a grain supply device having a grain delivery port axially aligned with one of the combustion chambers of the rotary chamber body; a grain pushing device for pushing the grain at the grain delivery port into the one combustion chamber; and a rotary device for the rotary chamber body to rotate at a certain angle. The present invention provides a novel rotary-chamber multi-pulse solid rocket engine, which can achieve sequential loading and ignition of a plurality of grains, thereby realizing multi-pulse ignition of the solid rocket engine.

Description

Technical Field

[0001] The present invention belongs to the field of aerospace technology, and more particularly relates to a rotary-chamber multi-pulse solid rocket engine. Background Art

[0002] Solid rocket engines are easy to maintain, have good safety and high reliability, and play an important role as one of the power devices for missiles and rockets. However, for traditional solid rocket engines, since they are power devices with a one-time ignition in place, once the propellant is ignited, it is difficult to interrupt, so it is impossible to achieve thrust termination and multiple start-stop operations.

[0003] At present, typical solid multi-pulse engine technologies such as solid variable thrust engines, solid dual-pulse engines, and solid attitude and orbit control engines have continuously made breakthroughs, and dual-pulse engines, triple-pulse engines, and even six-pulse engines have been developed. These multi-pulse engines basically adopt a compartmentalized integrated structure, mainly by adding one or two pulse units in the combustion chamber of the rocket engine. However, this solution has the following problems: increasing the volume and free volume of the combustion chamber, increasing the actual ignition difficulty, the connection between the pulse unit and the combustion chamber makes the grain more vulnerable to the influence of changes in the surrounding environment, the degree of discrete energy distribution is not high, and it is difficult to achieve a higher-level distribution and management of the engine energy. Summary of the Invention

[0004] Combined with the inventor's research and practical experience in this field, the following improved technical solutions are proposed here.

[0005] A rotary-chamber multi-pulse solid rocket engine, characterized by comprising:

[0006] A rotary chamber body having a plurality of combustion chambers for accommodating grains;

[0007] A medicine supply device having a medicine delivery port axially aligned with one of the combustion chambers of the rotary chamber body;

[0008] A medicine pushing device for pushing the grain at the medicine delivery port into the one combustion chamber;

[0009] A rotary chamber body rotating device for rotating the rotary chamber body at a certain angle.

[0010] According to one aspect of the present invention, the medicine supply device includes a medicine storage box and a medicine delivery shaft, the medicine delivery shaft is connected to a baffle, and a compression spring is arranged on the medicine delivery shaft, one end of the compression spring abuts against the baffle, and the other end abuts against a fixed position on the medicine storage box.

[0011] According to one aspect of the present invention, a medicine storage space is provided inside the medicine storage cartridge. The medicine storage space can accommodate at least two layers of medicine columns, and the medicine delivery port is conical, and only one medicine column can be accommodated at the medicine delivery port.

[0012] According to one aspect of the present invention, the rotary chamber body rotating device includes a rotary chamber body dial, and the rotary chamber body dial has:

[0013] A sector portion, the diameter of which is the same as the diameter of the concave portion on the outer peripheral contour of the rotary chamber body;

[0014] A rod-shaped portion, which is arranged on the other side of the rotary chamber body dial opposite to the sector portion. The rod-shaped portion has a laterally extending portion. One end of the rod-shaped portion is connected to the sector portion, and the laterally extending portion can cooperate with the radial groove on the rotary chamber body.

[0015] According to one aspect of the present invention, the radial grooves and the concave portions are uniformly arranged in the circumferential direction, and the number thereof is the same as the number of the combustion chambers.

[0016] According to one aspect of the present invention, it further includes a cam curve groove runner and a cam follower. The rotation of the cam curve groove runner can cause the cam follower to move axially or remain stationary axially.

[0017] According to one aspect of the present invention, the cam follower includes a cam push rod and a T-shaped slider, and the T-shaped slider is fixedly connected to the medicine pushing device.

[0018] According to one aspect of the present invention, a chamber cleaning device is further provided, and the chamber cleaning device and the medicine pushing device are respectively located on both sides of the T-shaped slider.

[0019] According to one aspect of the present invention, it further includes a locking device, and the locking device includes a locking support and a locking lower body, and the locking lower body can move axially inside the locking support.

[0020] The present invention also proposes a method for operating the above-mentioned rotary chamber type multi-pulse solid rocket engine, rotating the rotary chamber body, and when the rotary chamber body rotates through a certain angle, completing the loading of the medicine column; repeating the above step to achieve multi-pulse ignition.

[0021] Based on the above technical solutions, the present invention has the following beneficial technical effects:

[0022] A new type of rotary chamber type multi-pulse solid rocket engine is proposed, so that the sequential loading and ignition of multiple medicine columns can be realized, thereby realizing the multi-pulse ignition of the solid rocket engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The exemplary embodiments of the present invention are described with reference to the accompanying drawings, wherein:

[0024] Figure 1 Shows a three-dimensional schematic diagram of the rotary-chamber multi-pulse solid rocket engine of the present invention.

[0025] Figure 2 Shows a front view of the rotary-chamber multi-pulse solid rocket engine of the present invention.

[0026] Figure 3 Shows an internal schematic diagram of the propellant storage magazine of the rotary-chamber multi-pulse solid rocket engine of the present invention.

[0027] Figure 4 Shows a schematic diagram of the rotary-chamber body and the dial of the rotary-chamber multi-pulse solid rocket engine of the present invention.

[0028] Figure 5 Shows an overall schematic diagram of the locking mechanism of the rotary-chamber multi-pulse solid rocket engine of the present invention.

[0029] Figure 6 Shows a schematic diagram of the lower locking body of the rotary-chamber multi-pulse solid rocket engine of the present invention.

[0030] Figure 7 Shows a schematic diagram of the nose of the rotary-chamber multi-pulse solid rocket engine of the present invention. Specific embodiments

[0031] The following describes the specific embodiments of the present invention with reference to the accompanying drawings.

[0032] Figure 1 Shows a three-dimensional schematic diagram of the rotary-chamber multi-pulse solid rocket engine of the present invention.

[0033] Specifically, the rotary-chamber multi-pulse solid rocket engine of the present invention includes a propellant storage and delivery device, combined with Figure 3It can be seen that in the medicine storage cartridge 3, a plurality of medicine columns are accommodated. A part of the medicine delivery shaft 1 is located outside the medicine storage cartridge 3, and a part is located inside the medicine storage cartridge 3. A compression spring 20 is provided on the part of the medicine delivery shaft 1 inside the medicine storage cartridge 3 and is connected to a baffle 21 at one end. Thus, the baffle 21 and the medicine delivery shaft 1 can move along the length direction of the medicine storage cartridge 3, and under the action of the compression spring 20, the medicine column 22 is pushed to move, so that the medicine column is moved out of the medicine storage cartridge 3. The main body part of the medicine storage cartridge 3 can accommodate two layers of medicine columns, and at the end part of the medicine storage cartridge 3, there is a tapered contraction part where only one medicine column can be accommodated. The medicine columns are arranged in two layers inside the medicine storage cartridge 3, and under the action of the compression spring 20, the baffle 21 pushes the medicine column 22 to move, so that one medicine column is accommodated at the end part of the medicine storage cartridge 3, and the end part can also be called the medicine delivery port. The end part of the medicine storage cartridge 3 is aligned with a medicine column accommodation cavity of the rotating chamber body 4, and the medicine column located at the end part can be pushed into the medicine column accommodation cavity of the rotating chamber body 4 under the action of the medicine pushing device, thus completing the loading of the medicine column.

[0034] On the baffle 21, a baffle limit rod 2 is also provided, as Figure 1 shown, to limit the position of the baffle 21. The baffle limit rod 2 can move along a groove provided on the side wall of the medicine storage cartridge 3.

[0035] The rotating chamber body 4 is accommodated in the frame 6 and can rotate around its own axis. The structure of the rotating chamber body 4 can be referred to Figure 4 . The rotating chamber body 4 can have a plurality of medicine column accommodation cavities, for example, 6. Of course, it can also be other numbers, and the number of the rotating chamber bodies 4 can be matched with the motion parameters of other mechanisms to achieve corresponding functions.

[0036] On the frame 6, a pressure sensor 5 is provided near the rotating chamber body 4 for detecting the pressure change near the rotating chamber body 4.

[0037] The following describes how the rotating chamber body 4 rotates. In Figure 1 , a power source 14 is shown, and the power source can be a motor. Further combined with Figure 2 , the power source 14 outputs rotational power and can drive the main shaft 18 to rotate. The rotating chamber body dial 19 is fixedly arranged on the main shaft 18, so that it can rotate along with the rotation of the main shaft 18. The structure of the rotating chamber body dial 19 is in Figure 4. Specifically, the rotary body dial 19 has a sector-shaped portion, the diameter of which is the same as the diameter of the recessed portion on the outer circumference of the rotary body 4, so that when the rotary body dial 19 is rotated in an appropriate position, its sector-shaped portion and the recessed portion on the outer circumference of the rotary body 4 cooperate with each other, and at this time, the rotation of the rotary body dial 19 will not cause the rotation of the rotary body 4. On the other side of the rotary body dial 19 opposite to the sector-shaped portion, a rod-shaped portion is provided, and the rod-shaped portion has a lateral extension portion, for example, the entire rod-shaped portion is L-shaped, one end of which is connected to the sector-shaped portion, and the lateral extension portion can penetrate into the radial groove of the rotary body 4, as shown in FIG. Figure 4 As shown. Figure 4 In the position shown, the lateral extension portion of the rotary body dial 19 is just located at the outermost end of the radial groove of the rotary body 4. When the rotary body dial 19 continues to rotate, the lateral extension portion drives the rotary body 4 to rotate and the lateral extension portion radially extends into the radial groove, so that the rotary body 4 rotates in the direction of the arrow shown in the figure, thereby realizing the rotation of the rotary body 4.

[0038] exist Figure 4 Also shown are the loading position, the firing position and the clearing position, which can be combined with Figure 1 Specifically, at corresponding positions, the charge pushing device 10 and the chamber cleaning device 11 can move along the axis of the rotating barrel body, thereby respectively pushing the charge column at the end of the charge storage box 3 into the interior of the rotating barrel body 4 and pushing the burned charge column out of the rotating barrel body 4. The charge pushing device 10 and the chamber cleaning device 11 can be in the form of a rod, and the two are fixedly connected. For example, the two can be connected by Figure 1 The T-shaped slider 15 is connected.

[0039] The following describes how the charge pushing device 10 and the chamber cleaning device 11 move axially. Figure 1 and Figure 2 It can be seen that a cam curve groove rotating wheel 16 is also provided on the driving shaft 18. The cam push rod 13 is fixedly connected to the T-shaped slider 15 and can be connected to the cam curve groove rotating wheel 16, so that when the cam curve groove rotating wheel 16 rotates, as the cam curve groove in the cam curve groove rotating wheel 16 changes, the cam push rod 13 and the T-shaped slider 15 move along the axis or remain stationary in the axial direction. Figure 2 A portion of the cam curve groove in the cam curve groove rotating wheel 16 can be seen in the figure. The cam push rod 13 can be arranged in the cam push rod fixing seat 12.

[0040] On one side of the rotary body 4, a head 7 is provided, and Figure 2 It can be seen from the figure that a nozzle 17 is arranged on the other side of the rotor body 4 opposite to the machine head 7.

[0041] Figure 5A schematic diagram of the nose 7, the locked lower body 9 and the locking support 8 is shown. Combining Figure 1 , the locking support 8 is fixedly connected to the frame, while the nose 7 and the locked lower body 9 can move axially along the inside of the locking support 8 along the axis of the rotary chamber body 4.

[0042] As Figure 6 shown, on the locked lower body 9, two tracks are provided. These two tracks respectively include an unlocking inclined plane and a locking inclined plane, and the unlocking inclined plane is closer to the axis of the rotary chamber body than the locking inclined plane. The extending directions of the unlocking inclined plane and the locking inclined plane are both parallel to the axis of the rotary chamber body.

[0043] Figure 7 A top view of the nose 7 is shown. As can be seen from Figure 7 , on the nose 7, a left locking piece and a right locking piece are provided. The two locking pieces can cooperate with the unlocking inclined plane and the locking inclined plane on the locked lower body to open or close. Specifically, one end of the locking piece is connected to the nose 7, and the other end is provided with a columnar portion. The columnar portion is located in the two tracks and can move by contacting the unlocking inclined plane and the locking inclined plane. Thus, as the nose 7 moves along the axial direction, the locking piece also follows the nose 7 to move along the axial direction. At the same time, the columnar portion moves along the track, so that one end of the two locking pieces provided with the columnar portion also moves in a direction perpendicular to the axis, that is, this end of the two locking pieces opens or closes. When moving to the open position, this end of the locking piece can abut against the locking support.

[0044] Furthermore, returning to Figure 5 , combining Figure 6 and Figure 7 , it can be seen that a locking groove is also provided on the locking support. After the locking piece opens, it can cooperate with the locking groove to achieve reliable locking.

[0045] The working process of the solid rocket engine of the present invention will be described below.

[0046] The grain is pushed to the end in the propellant storage by the baffle. At this time, the power source drives the main shaft to rotate counterclockwise, and then drives the cam curve groove runner and the dial to rotate; at the same time, the cam curve groove runner drives the T-shaped slider and the cam push rod to move back and forth, and the dial drives the rotary chamber body to rotate.

[0047] When the cam curve groove runner rotates so that the lower end of the T-shaped slider is in the rear straight section of the cam curve groove, the T-shaped slider and the cam push rod are stationary, and the dial drives the upper rotary chamber body to rotate 60 degrees. At this time, the previous combustion chamber stopped at the ignition position rotates to the chamber cleaning position, and the combustion chamber at the loading position carrying the grain loaded in the previous cycle rotates to the ignition position, as Figure 4 .

[0048] When the cam curve groove runner rotates and the lower end of the T-shaped slider is in the inclined straight line section of the cam curve groove, the T-shaped slider slides forward to drive the medicine pushing rod and the chamber cleaning rod forward. The medicine pushing rod pushes the medicine column at the medicine feeding port into the combustion chamber at the loading position, and the chamber cleaning rod advances to the chamber cleaning position to clean the chamber. At the same time, the T-shaped slider drives the lower locking body forward, so that the locking protrusions on the left and right locking pieces in the nose move into the locking inclined surfaces of the lower locking body. At this time, the T-shaped slider continues to move forward, driving the lower locking body and the nose to continue to slide forward to form a reliable lock.

[0049] For the locking process, the cam push rod drives the lower locking body, the left / right locking pieces and the nose forward. When the nose returns to the in-place position, the left and right locking pieces with an opening tendency are exactly aligned with the locking grooves on the locking support, and under the action of the locking inclined surface of the lower locking body, the left and right locking pieces are forced into the left and right locking grooves on the locking support to be reliably locked. At this time, the lower locking body still continues to return, completing the locking free stroke to make the locking more reliable.

[0050] When the cam curve groove runner rotates and the lower end of the T-shaped slider is in the front straight line section of the cam curve groove, the whole device is in a locked state, and at this time, ignition combustion occurs in the combustion chamber at the ignition position.

[0051] When the cam curve groove runner rotates and the lower end of the T-shaped slider is in the second inclined straight line section of the cam curve groove, at this time, the T-shaped slider slides backward, driving the lower locking body to move backward, and the lower locking body drives the nose to move backward. At the same time, the cartridge pushing rod and the chamber cleaning rod also move backward.

[0052] For the unlocking process, the cam push rod drives the lower locking body to move backward. After completing the unlocking free stroke, the unlocking inclined surface on the lower locking body acts on the protrusions of the left and right locking pieces, causing the left and right locking pieces to close, and then driving the nose to move backward to achieve unlocking.

[0053] When the cam curve groove runner rotates and the lower end of the T-shaped slider enters its rear straight line section again, continue to cycle according to the previous working procedure.

[0054] What is described above is only an exemplary embodiment of the spirit and principle of the present invention. Those skilled in the art can understand that various changes can be made to the described examples without departing from the spirit and principle, and these changes and their various equivalent forms are all contemplated by the inventors and fall within the scope defined by the claims of the present invention.

Claims

1. A rotary-chamber multi-pulse solid rocket engine, characterized in that, Comprising: A rotating chamber body, the rotating chamber body having a plurality of combustion chambers for accommodating propellant grains; A propellant supply device having a propellant delivery port axially aligned with one of the combustion chambers of the rotating chamber body; A propellant pushing device for pushing the propellant grain at the propellant delivery port into the one combustion chamber; A rotating chamber body rotating device for rotating the rotating chamber body by a certain angle, the rotating chamber body rotating device including a rotating chamber body dial having: A sector portion, the diameter of the sector portion being the same as the diameter of the recess on the outer peripheral profile of the rotating chamber body; A rod-shaped portion provided on the side of the rotating chamber body dial opposite to the sector portion, the rod-shaped portion having a laterally extending portion, one end of the rod-shaped portion being connected to the sector portion, and the laterally extending portion being capable of cooperating with the radial groove on the rotating chamber body.

2. The rotating chamber type multi-pulse solid rocket engine according to claim 1, characterized in that: The propellant supply device includes a propellant storage magazine and a propellant delivery shaft, the propellant delivery shaft being connected to a baffle, and a compression spring being provided on the propellant delivery shaft, one end of the compression spring abutting against the baffle and the other end abutting against a fixed position on the propellant storage magazine.

3. The rotating chamber type multi-pulse solid rocket engine according to claim 2, characterized in that: A propellant storage space is provided in the propellant storage magazine, the propellant storage space being capable of accommodating at least two layers of propellant grains, and the propellant delivery port being conical, and only one propellant grain can be accommodated at the propellant delivery port.

4. The rotating chamber type multi-pulse solid rocket engine according to claim 1, characterized in that: The radial grooves and the recesses are uniformly arranged in the circumferential direction and the number thereof is the same as the number of the combustion chambers.

5. The rotating chamber type multi-pulse solid rocket engine according to any one of claims 1-3, characterized in that: It further includes a cam curve groove runner and a cam follower, and rotation of the cam curve groove runner can cause the cam follower to move axially or remain stationary axially.

6. The rotating chamber type multi-pulse solid rocket engine according to claim 5, characterized in that: The cam follower includes a cam push rod and a T-shaped slider, and the T-shaped slider is fixedly connected to the propellant pushing device.

7. The rotating chamber type multi-pulse solid rocket engine according to claim 6, characterized in that: A chamber cleaning device is further provided, and the chamber cleaning device and the propellant pushing device are respectively located on both sides of the T-shaped slider.

8. The rotating chamber type multi-pulse solid rocket engine according to claim 5, characterized in that: It further includes a locking device, the locking device including a locking support and a locking lower body, and the locking lower body can move axially within the locking support.

9. A method for operating the rotating chamber type multi-pulse solid rocket engine according to any one of claims 1-8, characterized in that: Rotating the rotating chamber body and, when the rotating chamber body has rotated by a certain angle, completing the loading of the propellant grains; Repeating the above step to achieve multi-pulse ignition.

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