A differential pressure valve for a propellant charging device

Abstract

The present invention discloses a differential pressure valve for a propellant charging device, comprising: a positioning plate, which is detachably arranged at the upper port of a combustion chamber; the bottom plate of the positioning plate is concave, and a circular hole is arranged in the middle; a circle of large holes is arranged around the bottom plate of the positioning plate; a pressure plate, the middle part of the upper end of which is connected and docked with a material guide unit; a circular tube inserted into the inner wall of the circular hole is arranged at the lower end of the pressure plate; and a circle of small holes is arranged around the pressure plate. The present invention forms a "differential pressure damping valve" structure at the feed port of the combustion chamber, so that the combustion chamber that has been filled with slurry "automatically waits" for other combustion chambers that have not been filled, fundamentally ensuring that all combustion chambers can be filled with slurry at the same time, uniformly and stably, and realizing the remote operation of injection casting of multiple engine charge column forming.

Description

Technical Field

[0001] The invention relates to the field of solid rocket engine manufacturing, in particular to a differential pressure valve of a propellant charging device. Background Art

[0002] Solid propellants are widely used as power sources in engines at home and abroad. The combustion chamber of the aircraft engine is loaded with propellants according to the process mode of weighing → premixing → mixing → pouring → curing. This loading mode is not only applicable to free-loading propellants but also to wall-poured propellants. With the increase in engine demand, the production capacity of manufacturers has also increased, and many new propellant loading processes and new equipment and devices developed for new loading processes have emerged. The specific steps of loading the combustion chamber are to install the engine combustion chamber in a vacuum container (pouring pot) so that the combustion chamber is completely in a vacuum environment in the pouring pot, and then use a mixer to mix the slurry in the mixing pot, and then pour it into the primary pouring hopper through the pot turning device, and then flow through the flower plate of the secondary hopper, so that the gas entrained in the slurry can be completely removed in a vacuum environment, and then the mixed slurry in the secondary hopper flows into the combustion chamber through the guide unit connected at the lower end, and the loading is completed.

[0003] At present, when vacuum pressure is drawn out in a pouring tank and multiple combustion chambers placed in the pouring tank are loaded with slurry, since the upper end of the combustion chamber has no damping effect, once the slurry in a combustion chamber is full and the other combustion chamber is not yet full, the pressure at the combustion chamber port is consistent, then the combustion chamber that is already full of slurry will continue to be filled with slurry, causing the slurry to overflow from the upper end of the combustion chamber, causing losses. As a result, it is impossible to ensure that all combustion chambers can be filled with slurry at the same time, evenly and stably, making it difficult to achieve long-distance operation of injection pouring of multi-engine charge column formation. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems or defects and provide advantages to be described later. In order to achieve these purposes and advantages according to the present invention, a differential pressure valve of a propellant charging device is provided, comprising:

[0005] A positioning plate is detachably arranged at the upper port of the combustion chamber; the bottom plate of the positioning plate is concave and a round hole is arranged in the middle; a circle of large holes is arranged around the bottom plate of the positioning plate;

[0006] The middle part of the upper end of the pressure plate is connected and connected with the material guiding unit; the lower end of the pressure plate is provided with a round tube inserted into the inner wall of the round hole; and a circle of small holes is arranged around the pressure plate.

[0007] Among them, preferably, the base plate of the positioning plate is tightly fitted to the end surface of the upper port of the combustion chamber, and is penetrated and fixed with a plurality of fixing bolts to form a detachable connection.

[0008] Among them, preferably, a lower docking ring is integrally provided on the outer side of the positioning plate; an upper docking ring matching the lower docking ring is integrally provided on the outer side of the pressure plate; a circle of sealing grooves is provided on the annular outer edge of the positioning plate; a third sealing ring is embedded in the sealing groove; after the upper docking ring and the lower docking ring are matched and fitted together, they are penetrated and fixed using multiple fixing bolts, thereby realizing a detachable connection.

[0009] Preferably, a short inlet tube coaxial with the round tube is integrally protruded from the middle of the upper end of the pressure plate; the short inlet tube and the end surface of the material guide unit are abutted against each other and then locked on the outside with a clamp to achieve communication;

[0010] Preferably, a raised receiving ring is provided on the upper end of the pressure plate; the radius of the receiving ring is larger than a circle of small holes;

[0011] Preferably, it further comprises a leakage disc; the leakage disc is fixedly clamped and arranged between the positioning disc and the upper port of the combustion chamber; the leakage disc is provided with a circle of inner leakage openings with a smaller inner diameter and a circle of outer leakage openings with a larger inner diameter; the inner leakage openings are composed of three annularly distributed thick arc leakage holes; the outer leakage openings are composed of three annularly distributed thin arc leakage holes; the size of the inner leakage openings matches the round tube; the size of the outer leakage openings matches the circle of small holes;

[0012] Among them, preferably, the lower end of the bottom plate of the positioning plate is provided with an annular groove matching the leakage plate; the lower end of the outer ring of the leakage plate abuts against the upper port of the combustion chamber; the upper end of the outer ring of the leakage plate is embedded in the annular groove to form a limit position;

[0013] Among them, preferably, a core mold for diversion is detachably provided in the middle of the leakage disk; an assembly hole is provided in the middle of the leakage disk; the lower end of the core mold is a cylinder matching the assembly hole; the upper end of the core mold is a cone with a bottom radius larger than the cylinder; the cone of the core mold is coaxially corresponding to the short feed tube; after the cylinder is passed through the assembly hole, the edge part of the bottom of the cone is abutted against the upper end of the assembly hole for abutment and limitation, thereby realizing a detachable connection.

[0014] The present invention has at least the following beneficial effects:

[0015] In the present invention, a circle of large holes on the positioning plate cooperates with a circle of small holes on the pressure plate to form a "pressure differential damping valve" structure at the feed port of the combustion chamber, allowing the combustion chamber that is already filled with slurry to "automatically wait" for other combustion chambers that are not yet filled (due to the difference in force on the slurry), fundamentally ensuring that all combustion chambers can be filled with slurry at the same time, evenly and stably, thereby realizing remote operation of injection casting of multi-engine charge columns.

[0016] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional structural diagram of the overall structure of the present invention;

[0018] Figure 2 This is a front structural diagram of the pressure plate of the present invention;

[0019] Figure 3 This is a structural diagram of the back side of the pressure plate of the present invention;

[0020] Figure 4 This is a front structural diagram of the positioning plate of the present invention;

[0021] Figure 5 This is a structural diagram of the back side of the positioning plate of the present invention (with the leakage ring installed);

[0022] Figure 6 This is a structural diagram of the back side of the positioning disk of the present invention (with the leakage ring removed);

[0023] Figure 7 It is a structural diagram of the leakage plate (with the upper core mold assembled) of the present invention;

[0024] Figure 8 It is a structural diagram of the leakage disc of the present invention (with the core mold removed). DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description. It should be understood that the terms "having", "including" and "comprising" used herein do not exclude the existence or addition of one or more elements or their combinations.

[0026] Figure 1-6 The invention shows a differential pressure valve of a propellant charging device, comprising:

[0027] The positioning plate 51 is detachably disposed on the upper port 91 of the combustion chamber 9; the bottom plate 511 of the positioning plate 51 is concave and has a round hole 510 in the middle; the bottom plate 511 of the positioning plate 51 is surrounded by a circle of large holes 512;

[0028] The pressure plate 52 has a middle portion of its upper end connected to the material guide unit 45 ; a round tube 521 is provided at the lower end of the pressure plate 52 to fit into the inner wall of the round hole 510 (thereby forming a closed annular space); and a circle of small holes 522 is provided around the pressure plate 52 .

[0029] Working principle: In this design, under the vacuum state of the inner cavity of the pouring pot 8, since the combustion chamber 9 is completely in the vacuum state of the inner cavity of the pouring pot 8, the slurry will flow from the material guide unit 45 into the combustion chamber 9 in a fully closed flow field, and in the inner cavity 92 of the combustion chamber 9, the slurry will flow to the middle and the gas will be discharged to the side, each taking its own path. There is a separation wall between the slurry material channel (i.e., the circular tube 521) and the residual gas discharge channel (i.e., a circle of large holes 512 and a circle of small holes 522), so that exhaust can be achieved. When the gas in the inner cavity of the combustion chamber 9 is completely discharged and the slurry is completely filled, the slurry will be introduced from the circle of large holes 512 into the "annular space" between the outer side of the circular tube 521 and the side of the positioning plate 51;

[0030] The key point here is that according to the conversion principle of kinetic energy and static energy, the mechanical energy of the fluid is conserved (that is, kinetic energy + gravitational potential energy + pressure potential energy = constant). When the slurry flows through a circle of large holes 512, due to the large aperture, the flow rate of the slurry is large and the pressure is small, the slurry will be poured into the above-mentioned "annular space" faster. In other words, it is very easy for the slurry to enter this "annular space" from below through a circle of large holes 512; however, at this time, a circle of small holes 522 is arranged on the top pressure plate 52. Due to the small aperture, the smaller cross-section increases the kinetic energy, resulting in lower static pressure energy, thereby generating a pressure difference on both sides of the pressure plate 52. In other words, it becomes extremely difficult for the slurry to be discharged upward from this "annular space" through a circle of small holes 522, thereby forming a stable damping effect;

[0031] Its main advantage is that a circle of large holes 512 on the positioning plate 51 cooperates with a circle of small holes 522 on the pressure plate 52 to form a "pressure differential damping valve" structure at the feed port of the combustion chamber 9, allowing the combustion chamber 9 that is already filled with slurry to "automatically wait" for other combustion chambers 9 that are not yet filled (due to the difference in the force applied to the slurry), thereby fundamentally ensuring that all combustion chambers 9 can be filled with slurry at the same time, evenly and stably, and realizing the remote operation of injection pouring multi-engine charge column formation; at the same time, the operator can observe the upper end of each pressure plate 52 through multiple glass windows on the outside of the pouring tank, that is, by observing whether there is slurry overflowing from the circle of small holes 522 on the pressure plate 52, to determine whether the combustion chamber 9 is already full of slurry.

[0032] In the above technical solution, the base plate 511 of the positioning plate 51 is tightly fitted to the end surface of the upper port 91 of the combustion chamber 9, and is penetrated and fixed with a plurality of fixing bolts, thereby forming a detachable connection.

[0033] Working principle: In this design, a further advantage is that it ensures that the positioning plate 51 can be stably fixed on the upper port 91 of the combustion chamber 9, thereby improving support and stability, while facilitating loading and unloading and improving assembly efficiency.

[0034] In the above technical solution, a lower docking ring 513 is integrally provided on the outer side of the positioning plate 51; an upper docking ring 523 matching the lower docking ring 513 is integrally provided on the outer side of the pressure plate 52; a sealing groove 514 is provided on the annular outer edge of the positioning plate 51; a third sealing ring 515 is embedded in the sealing groove 514; the upper docking ring 513 and the lower docking ring 523 are matched and fitted together, and then fixed with a plurality of fixing bolts, thereby realizing a detachable connection.

[0035] Working principle: A further advantage is that it ensures that the pressure plate 52 can be stably installed on the upper end of the positioning plate 51, so that the two are closely fitted, and at the same time it is convenient for loading and unloading, thereby improving assembly efficiency.

[0036] In the above technical solution, a short feed tube 524 coaxial with the circular tube 521 is integrally protruded from the middle of the upper end of the pressure plate 52; the short feed tube 524 and the end face of the material guide unit 45 are abutted against each other and then locked on the outside with a clamp to achieve communication.

[0037] Working principle: In this design, a further advantage is that the sealing of the feed short pipe 524 and the material guide unit 45 after docking is ensured, while facilitating loading and unloading and improving assembly efficiency.

[0038] In the above technical solution, a circle of raised receiving rings 525 is provided on the upper end of the pressure plate 52 ; the radius of the receiving ring 525 is larger than the circle of small holes 522 .

[0039] Working principle: In this design, a further advantage is that the medicine slurry squeezed out from a circle of small holes 522 can be restricted by the containing ring 522 to form a storage function, which is convenient for personnel to observe.

[0040] In the above technical scheme, it also includes a leakage disk 6; the leakage disk 6 is fixedly clamped between the positioning disk 51 and the upper port 91 of the combustion chamber 9; the leakage disk 6 is provided with a circle of inner leakage ports 61 with a smaller inner diameter and a circle of outer leakage ports 62 with a larger inner diameter; the inner leakage ports 61 are composed of three annularly distributed thick arc leakage holes; the outer leakage ports 62 are composed of three annularly distributed thin arc leakage holes; the size of the inner leakage ports 61 matches the circular tube 521; the size of the outer leakage ports 62 matches the circle of small holes 522.

[0041] Working principle: In this design, a leakage plate 6 is provided to be clamped between the positioning plate 51 and the upper port 91 of the combustion chamber 9. One of its further advantages is that the slurry (high-viscosity non-Newtonian fluid) entering from the feed short tube 524 will directly adhere to the cone 632 at the upper end of the core mold 63, and then slowly spread downward on the conical surface of the cone 632, and finally introduced into the inner cavity 92 of the combustion chamber 9 from a circle of inner leakage ports 61. This method makes the pouring of the slurry more uniform, and can stably fill the slurry into the inner cavity 92 of the combustion chamber 9;

[0042] The second further advantage is that the positions of the three thick arc-shaped fine holes are matched with the circle of large holes 512 to achieve communication, so that the exhausted gas and the subsequent slurry that fills the inner cavity 92 of the combustion chamber 9 can penetrate upward from the three thin arc-shaped leak holes into the circle of large holes 512;

[0043] In the above technical solution, the lower end of the chassis 511 of the positioning plate 51 is provided with an annular groove 516 matching the leakage plate 6; the lower end of the outer ring of the leakage plate 6 abuts against the upper port 91 of the combustion chamber 9; the upper end of the outer ring of the leakage plate 6 is embedded in the annular groove 516 to form a limit.

[0044] Working principle: In this design, a further advantage is that it can ensure the stable clamping of the drain disc 6, while facilitating installation and improving assembly efficiency.

[0045] In the above technical scheme, a core mold 63 for diversion is detachably provided in the middle of the leakage disk 6; an assembly hole 64 is provided in the middle of the leakage disk 6; the lower end of the core mold 63 is a column 631 matching the assembly hole 64; the upper end of the core mold 63 is a cone 632 whose bottom radius is larger than that of the column 631; the cone 632 of the core mold 63 corresponds coaxially to the feed short tube 524; after the column 631 is passed through the assembly hole 64, the edge part of the bottom of the cone 632 abuts against the upper end of the assembly hole 64 for abutment and limitation, thereby realizing a detachable connection.

[0046] Working principle: In this design, the core mold 63 can be disassembled more conveniently, while ensuring that the clamping connection between the core mold 63 and the drain disc 6 is more stable, thereby improving the applicability of the device.

[0047] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A differential pressure valve for a propellant charging device, characterized in that: include: A positioning plate is detachably arranged at the upper port of the combustion chamber; the bottom plate of the positioning plate is concave and a round hole is arranged in the middle; a circle of large holes is arranged around the bottom plate of the positioning plate; The middle part of the upper end of the pressure plate is connected to the material guide unit; the lower end of the pressure plate is provided with a round tube inserted into the inner wall of the round hole; the pressure plate is surrounded by a circle of small holes; The bottom plate of the positioning plate is tightly fitted to the end surface of the upper port of the combustion chamber, and is penetrated and fixed with a plurality of fixing bolts, thereby forming a detachable connection; A lower docking ring is integrally provided on the outer side of the positioning plate; an upper docking ring matching the lower docking ring is integrally provided on the outer side of the pressure plate; a circle of sealing grooves is provided on the annular outer edge of the positioning plate; a third sealing ring is embedded in the sealing groove; after the upper docking ring and the lower docking ring are matched and fitted, they are penetrated and fixed using multiple fixing bolts to achieve a detachable connection.

2. A differential pressure valve for a propellant charging device according to claim 1, characterized in that: A short material inlet tube coaxial with the round tube is integrally protruded from the middle of the upper end of the pressure plate; the short material inlet tube and the end surface of the material guide unit are abutted against each other and then locked on the outside with a clamp to achieve communication.

3. A differential pressure valve for a propellant charging device according to claim 1, characterized in that: A circle of raised accommodating ring is arranged on the upper end of the pressure plate; the radius of the accommodating ring is larger than a circle of small holes.

4. A differential pressure valve for a propellant charging device according to claim 1, characterized in that: It also includes a leakage disk; the leakage disk is fixedly clamped between the positioning disk and the upper port of the combustion chamber; the leakage disk is provided with a circle of inner leakage openings with a smaller inner diameter and a circle of outer leakage openings with a larger inner diameter; the inner leakage opening is composed of three annularly distributed thick arc leakage holes; the outer leakage opening is composed of three annularly distributed thin arc leakage holes; the size of the inner leakage opening matches the circular tube; the size of the outer leakage opening matches the circle of large holes.

5. A differential pressure valve for a propellant charging device as claimed in claim 4, characterized in that: The lower end of the chassis of the positioning plate is provided with an annular groove matching the leakage plate; the lower end of the outer ring of the leakage plate abuts against the upper port of the combustion chamber; the upper end of the outer ring of the leakage plate is embedded in the annular groove to form a limit.

6. A differential pressure valve for a propellant charging device as claimed in claim 4, characterized in that: A core mold for diversion is detachably provided in the middle of the drain pan; an assembly hole is provided in the middle of the drain pan; the lower end of the core mold is a column matching the assembly hole; the upper end of the core mold is a cone with a bottom radius larger than the column; the cone of the core mold is coaxial with the short feed tube; after the column is passed through the assembly hole, the edge of the bottom of the cone abuts against the upper end of the assembly hole for abutment and limitation, thereby realizing a detachable connection.

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