KR102311059B1 - Injection area control pintle injector using tension elastic member and injection area control pintle injector using compression elastic member - Google Patents

Abstract

Disclosed is a pintle injector for controlling an injection area using a tension-type elastic body. The pintle injector for controlling the injection area using the tension-type elastic body comprises: a pintle support body in which a first flow path is formed along the vertical direction, and which includes a central body disposed in the center surrounded by a second flow path so that the second flow path is branched from the first flow path and extends downward and an outer wall body provided outside the second flow path to surround the second flow path; a fuel supply unit including an oxidizing agent supply path extending upwardly from the first flow path to supply an oxidizing agent to the first flow path, and a fuel supply path formed outside the oxidizing agent supply path and downwardly injecting a fuel toward the outside of the pintle support body; a pintle unit provided to be movable in the vertical direction relative to the pintle support body in a status in which a closing member protruding upward to close a lower side of the second flow path is inserted into the lower side of the second flow path; and a tension-type elastic body installed between the central body and the pintle unit so that the pintle unit elastically moves in the vertical direction with respect to the pintle support body. A plurality of injection holes formed to spray the oxidizing agent supplied to the second flow path to the outside of the pintle support body are formed in the outer wall body at intervals along the vertical direction. An opening degree of the plurality of injection holes is controlled by a relative vertical movement of the pintle unit with respect to the pintle support body in cooperation with a vertical elastic behavior of the tension-type elastic body. An object of the present invention is to provide the pintle injector for controlling the injection area using the tension-type elastic body for controlling thrust, and the pintle injector for controlling the injection area using the tension-type elastic body.

Description

Injection area control pintle injector using tension type elastic body and injection area control pintle injector using compression type elastic body

The present invention relates to a pintle injector for adjusting the injection area using a tension type elastic body and a pintle injector for adjusting the injection area using a compression type elastic body.

At home and abroad, interest in lunar exploration and deep-sea space exploration is increasing. At the same time, research on the thrust control method and technology of the rocket is being conducted. In particular, reusable rockets that can reduce costs are receiving a lot of attention. Thrust control technology is essential for the launched rocket to land safely on the ground.

However, since the pintle is located at the end of the injector, the structure must be simple in order to operate it. Accordingly, there has been a demand for a pintle injector capable of controlling thrust according to the injection pressure with a simple structure.

The technology that is the background of the present application is disclosed in Korean Patent Publication No. 10-1845544.

The present application is to solve the problems of the prior art described above, and to provide a pintle injector for controlling the injection area using a tension type elastic body and a pintle injector for controlling the injection area using a compression type elastic body using a tension type elastic body to control the thrust with a simple structure without a special mechanical device. The purpose.

However, the technical problems to be achieved by the embodiment of the present application are not limited to the technical problems as described above, and other technical problems may exist.

As a technical means for achieving the above technical problem, in the injection area control pintle injector using a tension-type elastic body according to an aspect of the present application, a first flow path is formed along an up-down direction, and a second flow path is separated from the first flow path. a pintle support including a central body disposed in the center surrounded by the second flow path to branch and extend downwardly and an outer wall body provided on the outside of the second flow path to surround the second flow path; A fuel having an oxidizing agent supply path extending upward from the first flow path to supply an oxidizing agent to the first flow path, and a fuel supply path formed outside the oxidizing agent supply path and downwardly injecting fuel toward the outside of the pintle support. supply; a pintle part provided to be movable in a vertical direction relative to the pintle support body in a state in which a closing member protruding upward to close the lower side of the second flow path is inserted into the lower side of the second flow path; and a tension-type elastic body installed between the central body and the pintle part so that the pintle part elastically moves in the vertical direction with respect to the pintle support body. A plurality of injection holes formed to be sprayed are formed at intervals along the vertical direction, and the opening degree of the plurality of injection holes is relative to the vertical direction movement of the pintle part with respect to the pintle support body that interlocks with the vertical elastic behavior of the tension-type elastic body. can be controlled by

The rocket according to an aspect of the present application may include a pintle injector for controlling the injection area using the tension-type elastic body according to the aspect of the present application.

In the injection area control pintle injector using a compression-type elastic body according to an aspect of the present application, a flow path is formed along a vertical direction, and an outer wall provided on the outside of the flow path to surround the flow path and the lower end of the outer wall body are extended inwardly. a pintle support including an inner circumferential member in which the outlet of the flow path is formed; a fuel supply part extending upward from the flow path to provide an oxidizing agent supply path for supplying an oxidizing agent to the flow path, and a fuel supply path formed outside the oxidant supply path to inject fuel downwardly toward the outside of the pintle support; an inner extension member protruding upwardly to the inside of the passage through the outlet of the passage, and a closing member extending outwardly from the inner extension member to close the passage, wherein the closing member is disposed in the passage a pintle portion provided to be movable in a vertical direction relative to the pintle support; and a compression-type elastic body installed between the closing member and the inner circumferential member so that the pintle part elastically moves in the vertical direction with respect to the pintle support body, wherein the outer wall body contains an oxidizing agent supplied to the flow path outside the pintle support body A plurality of injection holes are formed at intervals in the vertical direction, and the opening degree of the plurality of injection holes is relative to the vertical direction movement of the pintle part with respect to the pintle support body that interlocks with the vertical elastic behavior of the compression-type elastic body. can be controlled by

The rocket according to an aspect of the present application may include a pintle injector for adjusting the injection area using the compression-type elastic body according to the aspect of the present application.

The above-described problem solving means are merely exemplary, and should not be construed as limiting the present application. In addition to the exemplary embodiments described above, additional embodiments may exist in the drawings and detailed description.

According to the above-described problem solving means of the present application, according to the relationship between the propellant supply pressure and the restoring force of the tension-type elastic body, when the supply pressure is greater than the restoring force of the tension-type elastic body, the injection area and flow rate of the propellant increase, and conversely, the supply pressure increases the tension Since the injection area and flow rate of the propellant may be reduced when the restoring force is smaller than the restoring force of the molded elastic body, a pintle injector in which the injection area is controlled can be implemented with a simple structure using a tension-type elastic body without a special mechanical device.

According to the relationship between the propellant supply pressure and the restoring force of the compression type elastic body, when the supply pressure is greater than the restoring force of the compression type elastic body, the injection area and flow rate of the propellant increase. Since the area and the flow rate can be reduced, the pintle injector in which the injection area is controlled can be implemented with a simple structure using a compression-type elastic body without a special mechanical device.

1 is a schematic perspective view of an injection area control pintle injector using a tension-type elastic body according to an embodiment of the present application.
2 is a schematic front view of the injection area control pintle injector using a tension-type elastic body according to an embodiment of the present application.
FIG. 3 is a schematic conceptual cross-sectional view for explaining a cross-section AA of FIG. 2 .
Figure 4 is a schematic perspective view showing the inside of the pintle support of the injection area control pintle injector using a tension-type elastic body according to an embodiment of the present application.
5 is a schematic conceptual cross-sectional view for explaining the elastic behavior of the pintle part of the injection area control pintle injector using the tension-type elastic body according to an embodiment of the present application.
6 and 7 are schematic conceptual cross-sectional views for explaining the extension angle of the injection hole of the injection area control pintle injector using the tension-type elastic body according to an embodiment of the present application.
8 is a schematic conceptual cross-sectional view for explaining a cooling passage of the injection area control pintle injector using a tension-type elastic body according to an embodiment of the present application.
9 is a schematic perspective view of an injection area control pintle injector using a compression-type elastic body according to an embodiment of the present application.
10 is a schematic front view of the injection area control pintle injector using a compression type elastic body according to an embodiment of the present application.
11 is a schematic conceptual cross-sectional view for explaining a cross-section BB of FIG. 10 .
12 is a schematic conceptual cross-sectional view for explaining the elastic behavior of the pintle part of the injection area control pintle injector using the compression type elastic body according to an embodiment of the present application.
13 is a schematic conceptual cross-sectional view for explaining a cooling passage of the injection area control pintle injector using a compression-type elastic body according to an embodiment of the present application.

Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art to which the present application pertains can easily implement them. However, the present application may be embodied in several different forms and is not limited to the embodiments described herein. And in order to clearly explain the present application in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout this specification, when a part is "connected" to another part, it is not only "directly connected" but also "indirectly connected" or "electrically connected" with another element interposed therebetween. "Including cases where

Throughout this specification, when it is said that a member is positioned "on", "on", "on", "under", "under", or "under" another member, this means that a member is positioned on the other member. It includes not only the case where they are in contact, but also the case where another member exists between two members.

Throughout this specification, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

In addition, the terms (upper, upper, upper, lower, lower, lower, etc.) related to the direction or position in the description of the embodiment of the present application are set based on the arrangement state of each component shown in the drawings. For example, when looking at FIGS. 1 to 3 , the overall 12 o'clock direction is the upper side, the overall 12 o'clock direction is the upper side, the overall 12 o'clock direction is the upper surface, and the overall 6 o'clock direction is the lower side. , the portion generally facing the 6 o'clock direction may be the lower portion, and the surface generally facing the 6 o'clock direction may be the lower surface.

The present invention relates to a pintle injector for adjusting the injection area using a tension type elastic body and a pintle injector for adjusting the injection area using a compression type elastic body.

The present application may propose an injector that adjusts the propellant injection area with an elastic body (eg, a spring) without a special mechanical device. In the injector proposed by the present application, there may be two ways of locating a tension-type spring or a compression-type spring between a pintle and a structure adjacent to the pintle.

First, the injection area control pintle injector using the tension-type elastic body according to an embodiment of the present application (hereinafter referred to as 'pintle injector using the tension-type elastic body') will be described.

1 is a schematic perspective view of an injection area control pintle injector using a tension type elastic body according to an embodiment of the present application, and FIG. 2 is a schematic front view of the injection area control pintle injector using a tension type elastic body according to an embodiment of the present application 3 is a schematic conceptual cross-sectional view for explaining the cross section AA of FIG. 2, and FIG. 4 is a schematic view showing the inside of the pintle support of the injection area control pintle injector using the tension-type elastic body according to an embodiment of the present application It is a perspective view, and FIG. 5 is a schematic conceptual cross-sectional view for explaining the elastic behavior of the pintle part of the injection area control pintle injector using the tension-type elastic body according to an embodiment of the present application.

1 to 3 , the pintle injector using the present tensile type elastic body includes a pintle support body 1 . Referring to FIGS. 3 and 4 , the first flow path 11 is formed in the pintle support body 1 in the vertical direction. Referring to FIG. 4 , the lower portion of the first flow path 11 may extend in the vertical direction obliquely toward the outside as it goes downward.

In addition, referring to FIGS. 3 and 4 , the pintle support 1 is located at the center surrounded by the second flow path 12 so that the second flow path 12 is branched from the first flow path 11 and extended in the downward direction. and an outer wall body 14 provided on the outside of the second flow path 12 so as to surround the central body 13 and the second flow path 12 to be disposed. Here, the branching of the second flow path 12 from the first flow path 11 may mean that the second flow path 12 is branched and extended toward the circumference of the central body 14 based on the central body 14 . Accordingly, the central body 13 and the outer wall body 14 may be connected in the inner and outer directions.

For example, referring to FIG. 4 , the second flow path 12 may include a flow path section extending in a branching form into a plurality of flow paths and a flow path section extending by rejoining the plurality of flow paths. When the plurality of flow paths are merged and extended again, it may mean that the plurality of flow paths extend downward in a state in which they are continuously connected to each other along the outer circumferential direction of the central body.

In addition, referring to FIGS. 3 and 4 , the outer wall 14 has injection holes 141a and 141b formed to spray the oxidizing agent supplied to the second flow path 12 to the outside of the pintle support 1 along the vertical direction. A plurality are formed at intervals. 4, some of the plurality of injection holes (141a, 141b) are formed along the circumferential direction of the pintle support 1 to form one group (column), the other of the plurality of injection holes (141a, 141b) Some may be formed along the circumferential direction of the pintle support 1 to form one group (column), and the groups may be formed at intervals in the vertical direction. In terms of the blockage factor and the combustion environment, two rows of injection ports 141a and 141b may be appropriate as shown in FIGS. 3 and 4 .

When the injection holes 141a and 141b are opened, the oxidizing agent of the second flow path 12 may be injected to the outside of the pintle support 1 through the injection holes 141a and 141b, and when the injection holes 141a and 141b are closed The spraying of the oxidant can be stopped. The opening degree on-off of the injection holes 141a and 141b may be controlled by a relative vertical movement of the pintle unit 3 with respect to the pintle support 1 , which will be described later.

1 to 3 , the pintle injector using the tensile type elastic body includes a fuel supply unit 2 . Referring to FIG. 3 , the fuel supply part 2 extends upward from the first flow path 11 to supply an oxidizing agent to the first flow path 11 , and is located outside the oxidizing agent supply path 21 and the oxidizing agent supply path 21 . A fuel supply path 22 for downwardly injecting fuel toward the outside of the pintle support 1 is formed. For example, the fuel supply path 22 may be formed such that fuel is supplied from the outside of the fuel supply unit 2 and injected downwardly.

In addition, referring to FIGS. 1 to 3 , the pintle injector using the tension type elastic body includes a pintle part 3 . Referring to FIG. 3 , the pintle part 3 has a pintle support body 1 in a state in which the closure member 31 protruding upward to close the lower side of the second flow path 12 is inserted into the lower side of the second flow path 12 . It is provided to be movable in the vertical direction relative to the . When the lower portion of the second flow path 12 extends along the circumferential direction of the pintle support 1 , the closing member 31 may extend along the circumferential direction of the pintle support 1 .

In addition, the pintle part 3 is a base member (reference numeral not given) connected to the lower end of the closing member 31 and a part of the outer peripheral surface of the pintle support body 1 (for example, the outer peripheral surface of the lower part of the pintle support body 1) an outer extension member 36 extending upwardly from the outer periphery of the base member to surround the portion). Accordingly, the outer wall 14 may have a state inserted between the outer extension member 36 and the closing member 31 . In addition, separation preventing protrusions 311 and 143 may be formed on each of the pintle part 3 and the pintle support body 1 to prevent the pintle part 3 from being detached from the pintle support body 1 . For example, an anti-separation protrusion 311 protruding outward may be formed on the upper portion of the closing member 31, and an anti-separation protrusion 311 protruding inward at the lower portion of the outer wall 14 to prevent the closure member 31 from being separated ( 311) and the anti-separation protrusion 143 may be formed. The removal of the pintle part 3 from the pintle support body 1 can be prevented by the separation preventing protrusion 311 of the closing member 31 and the separation preventing protrusion 143 of the outer wall 14 .

In addition, an oxidizing agent blocking sealing portion 5 may be formed between the inner surface of the outer extension member 36 and the outer surface of the outer wall body 14 and between the outer surface of the closing member 31 and the inner surface of the outer wall body 14 . Accordingly, when the oxidizing agent is injected through at least one of the plurality of injection holes 141a and 141b (eg, the upper injection hole 141a), between the pintle unit 3 and the pintle support 1, such as a pin It is possible to prevent the propellant from being lost to the space between the frame portion 3 and the pintle separation preventing jaw 143 . In addition, according to the oxidizing agent blocking sealing part 5, the oxidizing agent is completely face-shutoff in a state in which all the opening degrees are closed, so that leakage of propellant is prevented and the accuracy of thrust control can be increased.

In addition, as the multiple injection holes (141a, 141b) are formed, it may not be possible to completely block the propellant in the injection holes (141a, 141b). Therefore, the oxidizing agent blocking sealing part 5 may be made of a Teflon capsule O-ring that is resistant to cryogenic temperatures. Accordingly, propellant leakage is prevented and the accuracy of thrust control can be increased.

Also, referring to FIG. 3 , a sealing part 18 may be formed on the pintle support body 1 . For example, a sealing part 18 may be formed on the outer surface of the central body 14 of the pintle support 1 so that sealing between the pintle support 1 and the closing member 31 is made. A cryogenic motion seal may be used so that the inflow of the cryogenic oxidizer is blocked and the pintle part 3 moves up and down.

In addition, a seal 7 may be formed between the fuel supply 2 and the pintle support 1 .

In addition, the outer ends of the injection holes 141a and 141b may be closed by the outer extension member 36 .

In addition, referring to FIG. 3 , in the pintle injector using this tension type elastic body, the pintle part 3 is installed between the central body 13 and the pintle part 3 so that the pintle part 3 elastically moves in the vertical direction with respect to the pintle support body 1 . It includes a tension-type elastic body (4). Accordingly, the pintle unit 3 may be moved in the vertical direction relative to the pintle support body 1 in association with the vertical elastic behavior of the tension-type elastic body 4 .

In addition, referring to FIGS. 3 and 5 together, the opening degree of the plurality of injection holes 141a and 141b is for the pintle support 1 of the pintle part 3 interlocking with the vertical elastic behavior of the tension-type elastic body 4 . It can be controlled by relative vertical movement.

Specifically, referring to FIGS. 3 and 5 together, the pintle part 3 is supplied through the oxidizing agent supply path 21 and passes through the first flow path 11 and the second flow path 12 to the closing member 31 . The oxidizing agent supply pressure acting on the and the restoring force of the tension-type elastic body 4 may be moved up and down in a direction in which they are balanced.

For example, referring to FIG. 4 , the oxidizing agent supplied through the oxidizing agent supply path 21 and introduced into the second flow path 12 through the first flow path 11 is a force F1 on the pintle part 3 by the supply pressure. is applied, and accordingly, the tension-type elastic body 4 may be stretched. When the applied force F1 is greater than the restoring force F2 of the tension-type elastic body 4, the tension-type elastic body 4 may be stretched until F1=F2. Accordingly, the pintle part 3 can be moved downward at the same time, and as the pintle part 3 moves downward, the closing member 31 that has closed the inner ends of the injection ports 141a and 141b moves downward. Moving, the number of injection holes (141a, 141b) to open the injection hole (141a, 141b) increases (for example, the injection hole (141a) formed on the upper side can be opened first, and the pintle part 3 moves to the lower side) Accordingly, the number of open injection holes 141a and 141b may increase by opening the injection holes 141b formed on the lower side), and the injection area may increase.

In addition, when the supply pressure F1 is reduced after the tension-type elastic body 4 is stretched, the tension-type elastic body 4 may be elastically restored and contracted until F1=F2 is established. Accordingly, the pintle part 3 can be moved upward, and as the pintle part 3 moves upward, the closing member 31 is moved upward, and the number of the injection holes 141a and 141b to be closed increases. It may be increased (the number of open injection holes 141a and 141b is decreased), and the injection area may be decreased. In addition, the entire closure of the injection holes (141a, 141b) can be made.

In this way, in the pintle injector using the tension-type elastic body, the elastic body 4 is tensioned or compressed by the restoring force according to the propellant supply pressure, so that the propellant supply area and the supply flow rate by the pintle injector using the tension-type elastic body can be adjusted. For example, when the oxidizing agent supply pressure is decreased, the injection area is decreased, and when the supply pressure is increased, the injection area is increased, and the injection speed can be kept constant.

Accordingly, the pintle support 1, the pintle part 3, and the tension-type elastic body 4 have a plurality of injection holes 141a and 141b as the oxidizer supply pressure increases in a pressure action state to which the oxidizer supply pressure is applied. can be provided. For example, the specifications (size, shape, etc.) of the pintle support body 1, the pintle part 3, and the tension-type elastic body 4 show that as the oxidant supply pressure increases, the plurality of injection holes ( The number of 141a and 141b) may be set to increase.

6 and 7 are schematic conceptual cross-sectional views for explaining the extension angle of the injection hole of the injection area control pintle injector using the tension-type elastic body according to an embodiment of the present application.

Referring to FIG. 6 , the extension angle of the first injection hole 141a and the extension angle of the second injection hole 141b among the plurality of injection holes 141 are, 141b), the extension line of the first injection hole 141a and the extension line of the second injection hole 141b may be set to have an intersection on the outside of the pintle part 3 so that the oxidizing agent injected through it collides. For example, one of the first injection hole 141a and the second injection hole 141b (eg, the second injection hole 141b) is formed horizontally, and among the first injection hole 141a and the second injection hole 141b. The other one (the first injection hole 141a) may be extended at an oblique angle so that an extension line thereof intersects the one extension line.

Also, referring to FIG. 6 , the fuel supply path 22 may be formed such that the fuel supply direction faces an intersection (the intersection of the extension line of the first injection hole 141a and the extension line of the second injection hole 141b). For example, the lower end of the fuel supply path 22 may be formed above the intersection point.

For example, referring to FIG. 7 , if the injection holes (first injection holes) 141a of the upper row (first row) and the injection holes (second injection holes) 141b of the lower row (second row) are parallel to each other, the injection from the upper side The atomization performance is reduced because the point of impact with the fuel being injected (vertically injected) is different, and the spray shape can be divided into two layers. Also, the undamaged area 61 of the combustion chamber 6 can be small because the spray angle is relatively large.

On the other hand, referring to FIG. 6 , when the extension line of the first injection hole 141a and the extension line of the second injection hole 141b are set to have an intersection point on the outside of the pintle part 3, through the first injection hole 141a Collision points between the injected oxidizing agent, the oxidizing agent injected through the second injection port 141b, and the fuel injected from the upper side coincide, so that atomization performance can be improved and droplets can be evenly distributed. In addition, the spray angle is relatively reduced so that the undamaged portion 61 of the combustion chamber 6 can be secured widely.

In this way, the pintle injector using the present tension-type elastic body can reduce the area of the combustion chamber 6 that may be damaged by giving an inclination to one of the injection ports 141a and 141b in the first row. In addition, the collision point of the propellant injected in the vertical direction and the propellant injected from the injection holes of the first row (one of 141a and 141b) and the injection hole of the second row (the other one of 141a and 141b) may be formed on the same line. Accordingly, the layers are not separated and effective atomization can be achieved.

In addition, referring to FIG. 3 , a downwardly depressed portion 32 , which is depressed downward relative to the closing member 31 , may be formed on the inside of the closing member 31 in the pintle portion 3 . A portion of the central body 13 of the pintle support 1 may be inserted into the downward depression 32 . In addition, the central body 13 may be formed with an upwardly depressed portion 131 having a lower surface upwardly depressed. The tension-type elastic body 4 may be disposed between the downward depression 32 and the upward depression 131 .

In addition, referring to FIG. 3 , an upper protrusion 132 protruding downward from the upper surface of the interior of the upward depression 131 is formed in the upward depression 131 , and the downward depression 32 is formed in the downward depression portion 32 . A lower protrusion 33 protruding upwardly from the lower surface of the inner portion 32 may be formed.

In addition, the elastic body 4 may be a spring. In this case, the spring may be disposed so that the upper part surrounds the upper protrusion 142 and the lower part surrounds the lower protrusion 33 .

8 is a schematic conceptual cross-sectional view for explaining a cooling passage of the injection area control pintle injector using a tension-type elastic body according to an embodiment of the present application.

3 and 8 , at least one cooling passage 35 passing through the pintle unit 3 is formed in the pintle unit 3 so that the second flow path 12 and the lower side of the pintle unit 3 communicate with each other. can be

The oxidizing agent introduced into the cooling passage 35 is at least partially vaporized and discharged by the heat of combustion of the burned fuel among the fuel injected from the fuel supply passage 22 , and thus unburned fuel among the fuel injected from the fuel supply passage 22 . can be placed in a state capable of reacting with Specifically, the cryogenic oxidizer flows into the cooling passage 35 through the fuel supply passage 22 , the first passage 11 and the second passage 12 , passes through the cooling passage 35 , and is vaporized by the combustion temperature. and the vaporized oxidizing agent may be discharged to the lower side of the pintle part 3 through the cooling passage 35 . Accordingly, the gaseous oxidizing agent discharged from the cooling passage 35 may react with unburned fuel to increase combustion efficiency.

In addition, since the pintle tip (pintle part 3) is exposed in the combustion chamber, cooling to withstand the high temperature is absolutely necessary. The cryogenic propellant introduced through the cooling passage 35 can protect the pintle part 3 from being damaged at high temperature.

As described above, the pintle injector using the tension-type elastic body may be a technology that maintains the same momentum at a low flow rate or a high flow rate by controlling the injection area (opening degree) of the pintle according to the supply pressure of the propellant. The injection area may be adjusted according to the relationship between the pressure F1 of the propellant and the restoring force F2 of the tensile elastic body 4 . When the supply pressure is large, the injection area increases, and when the supply force is small, the injection area decreases, so that a constant injection speed can be maintained.

In addition, since the pintle injector using the tension-type elastic body includes multiple injection holes 141a and 141b, a means for more completely blocking the propellant may be required, and the oxidizing agent blocking sealing part 5 (eg, Teflon resistant to cryogenic temperature) By including a capsule O-ring), it is possible to prevent propellant leakage and increase the accuracy of thrust control. In addition, by making the first row of injection holes (for example, the upper row of injection holes 141a) among the injection holes 141a and 141b formed in multiple rows have a diagonal extension shape, the propellant injected in the vertical direction and the second row of injection holes (eg, the upper row of injection holes) , it is possible to make the collision point of the propellant injected from the injection port 141b of the lower row coincide. Accordingly, the propellant atomization performance can be increased and the damageable combustion chamber area can be reduced.

In addition, according to the pintle injector using this tension type elastic body, the cooling passage 35 can be formed in the pintle part 3, so that the cryogenic propellant fills the cooling passage 35 (by passing it through), the pintle part (3) can be made durable to a high-temperature combustion environment (it can be made to withstand a high-temperature combustion environment).

In addition, the present application may provide an engine including the pintle injector using the tension-type elastic body described above.

In addition, the present application provides a rocket including the pintle injector using the tension-type elastic body described above.

Hereinafter, the injection area control pintle injector using the compression type elastic body according to an embodiment of the present application (hereinafter referred to as 'pintle injector using the compression type elastic body') will be described. However, in the pintle injector using the present compression type elastic body, the description overlapping with the contents described in the pintle injector using the tension type elastic body according to the embodiment of the present application described above will be simplified or omitted, and the same or similar configuration is shown in the same drawing I'm going to use the code.

9 is a schematic perspective view of an injection area control pintle injector using a compression type elastic body according to an embodiment of the present application, and FIG. 10 is a schematic front view of the injection area control pintle injector using a compression type elastic body according to an embodiment of the present application 11 is a schematic conceptual cross-sectional view for explaining the BB cross-section of FIG. 10, and FIG. 12 is a schematic for explaining the elastic behavior of the pintle part of the injection area control pintle injector using the compression-type elastic body according to an embodiment of the present application It is a concept section.

9 to 11 , the pintle injector using the present compression type elastic body includes a pintle support body 1 . Referring to FIG. 11 , the pintle support body 1 has an outer wall 12 and a lower end of the outer wall 12 provided on the outside of the flow path 1 so that the flow path 11 is formed along the vertical direction and surrounds the flow path 11 . and an inner circumferential member 13 extending inwardly from which the outlet of the flow path 11 is formed therein.

Referring to FIG. 11 , a plurality of injection holes 141a and 141b formed to spray the oxidizing agent supplied to the flow path 11 to the outside of the pintle support 1 are formed in the outer wall 14 at intervals along the vertical direction.

Some of the plurality of injection holes (141a, 141b) are formed along the circumferential direction of the pintle support 1 to form one group (column), and the other part of the plurality of injection holes (141a, 141b) is the pintle support (1) ) may be formed along the circumferential direction to form one group (column), and the groups may be formed at intervals in the vertical direction from each other. In terms of the blockage factor and the combustion environment, two rows of injection ports 141a and 141b may be appropriate as shown in FIG. 11 .

When the injection holes (141a, 141b) are opened, the oxidizing agent of the flow path 11 may be injected to the outside of the pintle support 1 through the injection holes (141a, 141b), and when the injection holes (141a, 141b) are closed, the oxidizing agent Spraying can be stopped. The opening degree on-off of the injection holes 141a and 141b may be controlled by a relative vertical movement of the pintle unit 3 with respect to the pintle support 1 , which will be described later.

9 to 11 , the pintle injector using the present compression type elastic body includes a fuel supply unit 2 . The fuel supply part 2 extends upward from the flow path 11 and is formed outside the oxidizer supply path 21 and the oxidizer supply path 21 for supplying an oxidizing agent to the flow path 11 to provide an outer side of the pintle support 1 . A fuel supply path 22 for downwardly injecting the fuel toward is formed. For example, the fuel supply path 22 may be formed such that fuel is supplied from the outside of the fuel supply unit 2 and injected downwardly.

In addition, referring to FIGS. 9 to 11 , the pintle injector using the present compression type elastic body includes a pintle part 3 . Referring to FIG. 11 , the pintle part 3 includes an inner extension member 31 that protrudes upwardly to the inside of the passage 1 through the outlet of the passage 11 and an inner extension member 31 to close the passage 11 . and a closing member (32) extending outwardly from the closure member (32). The closing member 32 may be formed to expand toward the inner peripheral surface of the flow path 11 . In addition, the pintle unit 3 is provided to be movable in the vertical direction relative to the pintle support body 1 in a state in which the closing member 32 is disposed in the flow path 11 .

In addition, referring to FIG. 11 , the pintle unit 3 includes a base member 37 connected to the lower end of the inner extension member and an outer circumferential surface of the pintle support 1 (eg, a portion of the outer circumferential surface of the lower portion of the pintle support 1 ). ) may include an outer extension member 36 extending upwardly from the outer periphery of the base member 37 to surround a portion of the base member 37 .

11, between the outer surface of the closing member 32 and the inner surface of the outer wall body 12, and between the outer surface of the outer wall body 12 and the inner surface of the outer extension member 36, an oxidizing agent blocking sealing portion 5 is formed can be Accordingly, when the oxidizing agent is injected through at least one of the plurality of injection holes 141a and 141b (eg, the upper injection hole 141a), the propellant is lost into the space between the pintle part 3 and the pintle support body 1 . can make it not happen. In addition, according to the oxidizing agent blocking sealing part 5, the oxidizing agent is completely face-shutoff in a state in which all the opening degrees are closed, so that leakage of propellant is prevented and the accuracy of thrust control can be increased.

In addition, as the multiple injection holes (141a, 141b) are formed, it may not be possible to completely block the propellant in the injection holes (141a, 141b). Therefore, the oxidizing agent blocking sealing part 5 may be made of a Teflon capsule O-ring that is resistant to cryogenic temperatures. Accordingly, propellant leakage is prevented and the accuracy of thrust control can be increased.

In addition, a seal 7 may be formed between the fuel supply 2 and the pintle support 1 .

In addition, referring to FIG. 11 , the pintle injector using the present compression-type elastic body includes a compression-type elastic body 4 . The compression-type elastic body 4 is provided between the closing member 32 and the inner peripheral member 13 so that the pintle part 3 elastically moves in the vertical direction with respect to the pintle support body 1 . Accordingly, the pintle unit 3 may be moved in the vertical direction relative to the pintle support body 1 in association with the vertical elastic behavior of the compression type elastic body 4 .

Referring to FIG. 11 , for example, a downwardly depressed groove 135 may be formed in a portion surrounding the closing member 31 of the inner circumferential member 13 . At least a portion of the lower portion of the compression-type elastic body 4 may be disposed (inserted) in the groove 135 . In addition, an upwardly depressed groove 325 may be formed in a portion of the lower surface of the closing member 332 opposite to the groove 135 . At least a portion of the upper portion of the compression-type elastic body 4 may be disposed (inserted) in the groove 324 . For example, the grooves 135 and 325 may be formed to extend along the circumference of the inner extension member 31 .

In addition, referring together with FIGS. 11 and 12 , the opening degree of the plurality of injection holes 141a and 141b is for the pintle support 1 of the pintle part 3 interlocking with the vertical elastic behavior of the compression type elastic body 4 . It can be controlled by relative vertical movement.

Specifically, the pintle part 3 is supplied through the oxidizing agent supply path 21 and passes through the flow path to apply the oxidizing agent supply pressure acting on the closing member 32 or the inner extension member 31 and the restoring force of the tension-type elastic body 4 . It can be moved up and down in the direction of this equilibrium.

For example, the oxidizing agent supplied through the oxidizing agent supply path 21 and introduced into the flow path 11 applies a force F3 to the pintle part 3 with the supply pressure, and accordingly, the compression type elastic body 4 contracts. can be done When the supplied force F3 is greater than the restoring force F4 of the compression-type elastic body 4, the compression-type elastic body 4 may be contracted until F3=F4. Accordingly, the pintle part 3 can be moved downward at the same time, and as the pintle part 3 moves downward, the closing member 31 that has closed the inner ends of the injection ports 141a and 141b moves downward. As the number of the moving, open injection holes 141a and 141b increases (for example, the injection holes 141a formed on the upper side), it can be opened first, and according to the movement of the pintle part 3 to the lower side, the injection holes formed on the lower side (141b) may be opened by opening the number of openings (141a, 141b) may increase), and the injection area may be increased.

In addition, after the compression-type elastic body 4 is contracted, when the supply pressure F3 is reduced, the compression-type elastic body 4 can be elastically restored and relaxed until F3 = F4 is established. Accordingly, the pintle part 3 can be moved upward, and as the pintle part 3 moves upward, the closing member 31 is moved upward, and the number of the injection holes 141a and 141b to be closed increases. It may be increased (the number of open injection holes 141a and 141b is decreased), and the injection area may be decreased. In addition, the entire closure of the injection holes (141a, 141b) can be made.

In this way, in the pintle injector using the compressed elastic body, the elastic body 4 is contracted or restored (tensioned or compressed) by the restoring force according to the propellant supply pressure, so that the propellant supply area and supply flow rate by the pintle injector using the compressed elastic body can be adjusted. For example, when the oxidizing agent supply pressure is decreased, the injection area is decreased, and when the supply pressure is increased, the injection area is increased, and the injection speed can be kept constant.

Therefore, the pintle support 1, the pintle part 3, and the compression type elastic body 4 have a plurality of injection holes 141a and 141b as the oxidizer supply pressure increases in a pressure action state where the oxidizer supply pressure is applied. can be provided. For example, the specifications (size, shape, etc.) of the pintle support body 1, the pintle part 3, and the tension-type elastic body 4 show that as the oxidant supply pressure increases, the plurality of injection holes ( The number of 141a and 141b) may be set to increase.

In addition, the extension angle of the first injection hole (141a) and the extension angle of the second injection hole (141b) of the plurality of injection holes (141), the oxidant and the second injection hole (141b) injected through the first injection hole (141a) An extension line of the first injection hole 141a and an extension line of the second injection hole 141b may be set to have an intersection on the outside of the pintle part 3 so that the injected oxidizing agent collides. Since this corresponds to or is the same as that described in the pintle injector using the tension-type elastic body according to an embodiment of the present application, a detailed description thereof will be omitted.

In addition, the fuel supply path 22 may be formed such that the fuel supply direction is toward the intersection (the intersection of the extension line of the first injection hole 141a and the extension line of the second injection hole 141b). Since this corresponds to or is the same as that described in the pintle injector using the tension-type elastic body according to an embodiment of the present application, a detailed description thereof will be omitted.

13 is a schematic conceptual cross-sectional view for explaining a cooling passage of the injection area control pintle injector using a compression-type elastic body according to an embodiment of the present application.

11 to 13 , a main cooling passage 35 passing through the pintle unit 3 may be formed in the pintle unit 3 so that the flow path and the lower side of the pintle unit 3 communicate with each other. For example, the main cooling passage 35 may be formed passing through the closing member 31 and the base member 37 .

Referring to FIG. 13 , the oxidizing agent introduced into the main cooling passage 35 is at least partially vaporized and discharged by combustion heat of the burned fuel among the fuel injected from the fuel supply passage 22 , thereby being injected from the fuel supply passage 22 . It may be placed in a state capable of reacting with unburned fuel among the burned fuels. Since this corresponds to or is the same as that described in the pintle injector using the tension-type elastic body according to an embodiment of the present application, a detailed description thereof will be omitted.

In addition, since the pintle tip (pintle part 3) is exposed in the combustion chamber, cooling to withstand the high temperature is absolutely necessary. The cryogenic propellant introduced through the main cooling passage 35 or the additional cooling passage 30 to be described later can protect the pintle unit 3 from being damaged at high temperatures.

In addition, referring to FIGS. 11 and 12 , an extension passage 38 branching out from the middle of the main cooling passage 35 may be formed in the inner extension member 31 . In addition, at least one additional cooling passage 39 is formed in the base member 37 so that the oxidizing agent, which has been introduced into the main cooling passage 35 and then moved through the extension passage 38, is discharged to the lower side of the pintle unit 3 . can be

Accordingly, referring to FIG. 13, when the pintle part 3 moves downward relative to the pintle support 1 to form a space between the inner extension member 13 and the base member 37, the main cooling passage ( At least a portion of the oxidizing agent introduced into the 35) passes through the extension passage 38, the space between the inner extension member 13 and the base member 37, and the additional cooling passage 39, and is discharged to the lower side of the pintle part 3 can be Since the effect of the additional cooling passage 39 is similar to or the same as the effect of the main cooling passage 35 , a detailed description thereof will be omitted.

As described above, the pintle injector using the present compression type elastic body may be a technology that maintains the same momentum at a low flow rate or a high flow rate by controlling the injection area (opening degree) of the pintle according to the supply pressure of the propellant. The injection area may be adjusted according to the relationship between the pressure F3 of the propellant and the restoring force F4 of the compressible elastic body 4 . When the supply pressure is large, the injection area increases, and when the supply force is small, the injection area decreases, so that a constant injection speed can be maintained.

In addition, since the pintle injector using the present compression type elastic body includes multiple injection holes 141a and 141b, a means for more completely blocking the propellant may be required, and the oxidizing agent blocking sealing part 5 (eg, Teflon resistant to cryogenic temperature) By including a capsule O-ring), it is possible to prevent propellant leakage and increase the accuracy of thrust control. In addition, by making the first row of injection holes (for example, the upper row of injection holes 141a) among the injection holes 141a and 141b formed in multiple rows have a diagonal extension shape, the propellant injected in the vertical direction and the second row of injection holes (eg, the upper row of injection holes) , it is possible to make the collision point of the propellant injected from the injection port 141b of the lower row coincide. Accordingly, the propellant atomization performance can be increased and the damageable combustion chamber area can be reduced.

In addition, according to the pintle injector using the present compression type elastic body, the main cooling passage 35 or the additional cooling passage 39 can be formed in the pintle part 3, so that the cryogenic propellant is the main cooling passage 35 or additional By filling the cooling passage 39 (by allowing it to pass through), the pintle portion 3 can be made durable against a high-temperature combustion environment (it can be made able to withstand a high-temperature combustion environment).

In addition, the present application may provide an engine including the pintle injector using the tension-type elastic body described above.

In addition, the present application provides a rocket including the pintle injector using the tension-type elastic body described above.

In the related art, Korean Patent Publication No. 10-1845544 discloses a pintle injector whose opening degree is controlled by fuel supply pressure. According to the disclosed pintle injector, since the supply pressure of one of the two propellants is kept constant and the injection area does not change even if the supply pressure of the other is changed, it is difficult to maintain the spray angle. On the other hand, according to the present application, since the pintle part 3 operates independently, it is possible to maintain an optimal spray angle according to the supply pressure. In addition, since the present application is an elastic body (spring) installation method rather than a gas filling method, it may be easier to manufacture and assemble compared to the disclosed pintle injector. That is, since the present application only needs to install the elastic body 4, assembly may be convenient. In addition, since the pintle part 3 operates independently, it is possible to maintain an optimal spraying angle.

In addition, since the present application places the elastic body 4 on the pintle part 3, a complicated driving part is not required at the top of the injector.

In addition, the present application can prevent damage that may occur during combustion by adding a cooling passage 35 (a main cooling passage 35 or an additional cooling passage 39) to the pintle part 3 . In addition, the injection holes 141a and 141b (pintle holes) are formed in a plurality of rows (two rows) and at least one injection hole is formed as an inclined hole type extending with an inclination angle, thereby increasing spraying performance and widening the thrust control range. In other words, the present application can prevent the pintle melting problem in a high-temperature combustion environment by using the cooling passage 35 (the main cooling passage 35 or the additional cooling passage 39). In addition, a plurality of layers (two layers) of the injection holes 141a and 141b (pintle holes) can increase the thrust control range, and the spraying effect can be enhanced by using the injection hole extending with an inclination angle.

The above description of the present application is for illustration, and those of ordinary skill in the art to which the present application pertains will understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present application. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a dispersed form, and likewise components described as distributed may be implemented in a combined form.

The scope of the present application is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present application.

1: pintle support
11: 1st Euro
12: 2nd Euro
13: centrosome
131: upward depression
14: exterior wall
141a: nozzle
141b: nozzle
2: fuel supply
21: oxidizing agent supply path
22: fuel supply path
3: Pintle part
31: closing member
32: downward depression
33: lower projection
35: cooling passage, main cooling passage
36: outer extension member
37: base member
39: additional cooling passage
4: Tension type elastic body, compression type elastic body
5: Oxidizing agent blocking sealing part
7: shilling

Claims (16)

In the pintle injector,
A first flow path is formed in an up-down direction, and a central body disposed in the center surrounded by the second flow path so that the second flow path is branched from the first flow path to extend downwardly, and the second flow path surrounds the second flow path. 2 pintle support including an outer wall provided on the outside of the flow path;
A fuel having an oxidizing agent supply path extending upward from the first flow path to supply an oxidizing agent to the first flow path, and a fuel supply path formed outside the oxidizing agent supply path and downwardly injecting fuel toward the outside of the pintle support. supply;
a pintle part provided to be movable in a vertical direction relative to the pintle support body in a state in which a closing member protruding upward to close the lower side of the second flow path is inserted into the lower side of the second flow path; and
and a tension-type elastic body installed between the central body and the pintle part so that the pintle part elastically moves in the vertical direction with respect to the pintle support body,
A plurality of injection holes formed to spray the oxidizing agent supplied to the second flow path to the outside of the pintle support are formed in the outer wall at intervals along the vertical direction,
The opening degree of the plurality of injection holes is controlled by the relative vertical movement of the pintle part with respect to the pintle support body in cooperation with the vertical elastic behavior of the tension-type elastic body. According to claim 1,
The pintle part is supplied through the oxidizing agent supply path and passes through the first flow path and the second flow path to move up and down in a direction in which the oxidizing agent supply pressure acting on the closing member and the restoring force of the tension-type elastic body are balanced Injection area control pintle injector using phosphorus and tension type elastic body. 3. The method of claim 2,
The pintle support, the pintle part, and the tension-type elastic body are provided such that, in a pressure action state to which the oxidizing agent supply pressure is applied, the number of open injection holes among the plurality of injection holes increases as the oxidizing agent supply pressure increases. , Pintle injector with injection area control using a tension-type elastic body. According to claim 1,
The extension angle of the first injection hole and the extension angle of the second injection hole among the plurality of injection holes are such that the oxidizing agent injected through the first injection hole and the oxidizing agent injected through the second injection hole collide with the extension line of the first injection hole and The injection area control pintle injector using a tension-type elastic body, wherein the extension line of the second injection hole is set to have an intersection on the outside of the pintle part. 5. The method of claim 4,
The fuel supply path, the injection area control pintle injector using a tension type elastic body, which is formed so that the supply direction of the fuel is toward the intersection point. According to claim 1,
In the pintle part, a downward depression recessed relatively downward than the closing member is formed on the inner side of the closing member,
A central body of the pintle support is partially inserted into the downward depression,
An upward depression in which the lower surface is depressed upward is formed in the central body,
The tension-type elastic body is disposed between the downwardly depressed portion and the upwardly depressed portion, the injection area control pintle injector using the elastic body. According to claim 1,
At least one cooling passage passing through the pintle unit is formed in the pintle unit so that the second flow path and a lower side of the pintle unit communicate with each other;
The oxidizing agent introduced into the cooling passage is at least partially vaporized and discharged by combustion heat of the burned fuel among the fuel injected from the fuel supply path, so that it is in a state capable of reacting with the unburned fuel among the fuel injected from the fuel supply path. The injection area control pintle injector using a tension-type elastic body. A rocket including a pintle injector for adjusting the injection area using the tension-type elastic body according to claim 1 . In the pintle injector,
A pintle support body including an outer wall body provided on the outside of the flow path so as to surround the flow path, and an inner peripheral member extending inward from the lower end of the outer wall body, the outlet of the flow path is formed therein ;
a fuel supply part extending upward from the flow path to provide an oxidizing agent supply path for supplying an oxidizing agent to the flow path, and a fuel supply path formed outside the oxidant supply path to inject fuel downwardly toward the outside of the pintle support;
an inner extension member protruding upwardly to the inside of the passage through the outlet of the passage, and a closing member extending outwardly from the inner extension member to close the passage, wherein the closing member is disposed in the passage a pintle portion provided to be movable in a vertical direction relative to the pintle support; and
and a compression-type elastic body installed between the closing member and the inner circumferential member so that the pintle part elastically moves in the vertical direction with respect to the pintle support body,
In the outer wall, a plurality of injection holes formed to spray the oxidizing agent supplied to the flow path to the outside of the pintle support are formed at intervals along the vertical direction,
The opening degree of the plurality of injection holes is controlled by a relative vertical movement of the pintle part with respect to the pintle support body in cooperation with the vertical elastic behavior of the compression-type elastic body. 10. The method of claim 9,
The pintle part is supplied through the oxidizing agent supply path and passes through the flow path to move up and down in a direction in which the oxidizing agent supply pressure acting on the closing member or the inner extension member and the restoring force of the compression-type elastic body are balanced. Injection area control pintle injector using a compression type elastic body. 11. The method of claim 10,
The pintle support, the pintle part, and the compression-type elastic body are provided such that, in a pressure action state to which the oxidizing agent supply pressure is applied, the number of open injection holes among the plurality of injection holes increases as the oxidizing agent supply pressure increases. , Injection area control pintle injector using a compression type elastic body. 10. The method of claim 9,
The extension angle of the first injection hole and the extension angle of the second injection hole among the plurality of injection holes are such that the oxidizing agent injected through the first injection hole and the oxidizing agent injected through the second injection hole collide with the extension line of the first injection hole and The injection area control pintle injector using a compression-type elastic body, the extension line of the second injection hole is set to have an intersection on the outside of the pintle part. 13. The method of claim 12,
The fuel supply path, the injection area control pintle injector using a compression type elastic body, the fuel supply direction is formed to face the intersection point. 10. The method of claim 9,
A main cooling passage passing through the pintle unit is formed in the pintle unit so that the flow path and the lower side of the pintle unit communicate with each other;
The oxidizing agent introduced into the main cooling passage is at least partially vaporized and discharged by combustion heat of the burned fuel among the fuel injected from the fuel supply path, so that it can react with the unburned fuel among the fuel injected from the fuel supply path. A pintle injector with injection area control using a compression-type elastic body. 15. The method of claim 14,
The pintle part,
a base member connected to a lower end of the inner extension member; and
and an outer extension member extending upwardly from the outer periphery of the base member to surround a portion of the outer circumferential surface of the pintle support,
An extension passage branching outward from the middle of the main cooling passage is formed in the inner extension member,
At least one additional cooling passage is formed in the base member so that the oxidizing agent moved through the extension passage after flowing into the main cooling passage is discharged to the lower side of the pintle part. . 10. A rocket comprising a pintle injector for adjusting the injection area using the compression-type elastic body according to claim 9.

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