CN110953089A - Secondary throttling pair of secondary fuel speed regulating valve of rocket-based combined cycle engine - Google Patents
Secondary throttling pair of secondary fuel speed regulating valve of rocket-based combined cycle engine Download PDFInfo
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- CN110953089A CN110953089A CN201911099213.3A CN201911099213A CN110953089A CN 110953089 A CN110953089 A CN 110953089A CN 201911099213 A CN201911099213 A CN 201911099213A CN 110953089 A CN110953089 A CN 110953089A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/42—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using liquid or gaseous propellants
- F02K9/44—Feeding propellants
- F02K9/56—Control
- F02K9/58—Propellant feed valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/42—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using liquid or gaseous propellants
- F02K9/44—Feeding propellants
- F02K9/56—Control
- F02K9/566—Control elements and safety devices, e.g. pressure relief valves
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a secondary fuel speed regulating valve secondary throttling pair of a rocket-based combined cycle engine, which comprises: the valve sleeve, the valve body outlet hole component and the valve body V-V groove component are coaxially arranged; the valve body V-V groove part is a cylindrical body, the outer wall of the front section of the valve body V-V groove part is provided with one or more grooves which are uniformly distributed in a surrounding way; the outlet hole part of the valve body is a cylindrical shell with a closed front end and is arranged at the front end of the V-V groove part of the valve body; the outer wall of the outlet hole part of the valve body is provided with at least one radial outflow hole; the movable valve sleeve is a columnar shell with a closed front end and is tightly sleeved outside the outlet hole part of the valve body and the V-V groove part of the valve body; the rear end of the movable valve sleeve and each groove form a secondary throttle valve port, and the valve sleeve can slide back and forth along the axial direction to change the size of the secondary throttle valve port. By using the secondary throttling pair, the adjustment precision of the pressure difference of the primary throttling port can be kept high enough by adjusting the secondary valve port, the hydraulic impact is small, and the flow stability is good.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of rocket engines, and particularly relates to a secondary fuel speed regulating valve secondary throttling pair of a rocket-based combined cycle engine.
[ background of the invention ]
The rocket-based combined cycle engine (RBCC) is an air-breathing combined propulsion engine taking a rocket as a base, has high thrust-weight ratio and high specific impulse performance, can be used for propelling power of missiles and rocket carriers, and has wide application prospect. The RBCC engine working in a wide range can adopt a plurality of working modes such as injection, sub-combustion, super-combustion and pure rocket, an RBCC system needs to meet the supply and regulation requirements of main rockets and ram combustion propellants in different modes and fuels, and a fuel generator, a turbopump, a valve and a speed regulating valve form an integrated propellant supply system for rocket and ram combustion, so that the system structure can be simplified, the system reliability can be improved, the structural quality can be reduced, and the overall performance of the engine can be improved. In the integrated propellant supply system of the RBCC engine, a plurality of hydraulic speed regulating valves for throttling and pressurizing force compensation are arranged. The speed regulating valves stabilize the pressure difference of the first-stage throttling pair through automatic regulation of the second-stage pressure reducing throttling pair, and the flow rate of overflowing is changed by controlling the area of the first-stage throttling opening through operating an actuating mechanism. When the working condition of the turbine pump is changed by matching with the secondary circuit regulation, the area of the secondary fuel speed regulating valve is regulated to realize the regulation and control of the secondary fuel flow.
The RBCC engine secondary fuel speed regulating valve is similar to a simple liquid rocket engine thrust speed regulating valve in structure, but the working condition is more complex, and the RBCC engine secondary fuel speed regulating valve has the following characteristics:
(1) due to the multi-mode working characteristics of the wide-envelope RBCC engine, the secondary fuel flow regulating range is large, the regulating ratio reaches more than 10, and even if the secondary fuel adopts a distributed supply mode, the transformation ratio of a single speed regulating valve is also higher than 4;
(2) the RBCC engine secondary fuel speed regulating valve is different from the speed regulating valve of a pure liquid rocket engine in positive correlation characteristic, and the RBCC engine secondary fuel speed regulating valve usually works under the conditions of large flow, low pressure difference and small flow and high pressure difference. The reason is that the working pressure of the main rocket of the RBCC is greatly different from the pressure of the stamping runner, and the pump lift is determined by the working pressure of the main rocket. When the jet mode is often the main rocket high-flow high-chamber pressure, the secondary fuel speed regulating valve is in a low-flow working condition, and the pressure difference between an inlet and an outlet is very large; and during the inferior combustion/super-combustion mode, main rocket mostly is the low room pressure operating mode of miniflow, shuts down even, and RBCC mainly relies on the ram combustion to produce thrust, and secondary fuel governing valve flow increases by a wide margin, and changes the demand along with secondary fuel equivalence ratio and carries out flow control, and lower rocket pressure or ram flow channel pressure only need lower pump lift correspondingly for secondary fuel governing valve exit differential pressure is less.
Therefore, the secondary fuel speed regulating valve of the wide-envelope RBCC engine has to adapt to complex working conditions such as high-pressure-difference small flow, low-pressure-difference large flow and the like, and the structural design of the secondary valve port is of great importance. When the pressure difference changes, the opening degree of the valve port of the simple full-circle valve port slide valve structure is changed greatly, the hydraulic impact is large, and the capacity of keeping the flow stability is low.
[ summary of the invention ]
The invention aims to provide a secondary throttling pair of a secondary fuel speed regulating valve of a rocket-based combined cycle engine, which keeps the high enough regulation precision of the pressure difference of a primary throttling port by regulating a secondary valve port, and has the advantages of small hydraulic impact and good flow stability.
The pressure difference precision of the primary valve port is effectively guaranteed, the linearity of the flow of the speed regulating valve and the flow area of the primary valve port is high in a wide working range, and the secondary fuel flow control structure is simple and reliable.
The invention adopts the following technical scheme: rocket base combined cycle engine secondary fuel governing valve second grade throttle is vice for placing in the fuel circulation passageway, includes: the valve sleeve, the valve body outlet hole component and the valve body V-V groove component are coaxially arranged; the valve body V-V groove component is a cylindrical body, the outer wall of the front section of the valve body V-V groove component is axially provided with a plurality of grooves, and the grooves are one or more grooves which are uniformly distributed in a surrounding way; the outlet hole part of the valve body is a cylindrical shell with a closed front end and is arranged at the front end of the V-V groove part of the valve body, and the inner cavity of the cylindrical shell is communicated with the fuel circulation channel through each groove; the outer wall of the outlet hole part of the valve body is provided with at least one radial outflow hole for radially guiding out the fuel in the inner cavity;
the valve sleeve is a columnar shell with a closed front end, is tightly sleeved outside the valve body outlet hole part and the valve body V-V groove part, and forms a first chamber with the front end of the valve body outlet hole part, and the first chamber is communicated with the fuel circulation channel; the rear end of the valve sleeve and each groove form a secondary throttle valve port, and the valve sleeve can slide back and forth along the axial direction to change the size of the secondary throttle valve port.
The fuel injection valve further comprises an inner shell, wherein the inner shell is a shell with an opening at the rear end, is tightly sleeved on the outer wall of the front section of the valve sleeve and forms a second chamber with the valve sleeve, and the second chamber is communicated with the fuel circulation channel; a second damping hole is axially formed in the front end of the inner shell, and the second cavity is communicated with the fuel circulation channel through the second damping hole; a pressure difference is formed between the second chamber and the first chamber and is used for driving the valve sleeve to slide back and forth.
Further, the shape of each groove is: the front and back are provided with a small V-shaped groove and a large V-shaped groove with openings facing forwards, and the included angle of the small V-shaped groove is smaller than that of the large V-shaped groove.
Furthermore, the cross sections of the small V-shaped groove and the large V-shaped groove are arc-shaped, and the included angle of the small V-shaped groove is not less than 10 degrees.
Further, a telescopic spring is axially arranged between the valve sleeve and the end surface of the outlet hole part of the valve body.
Furthermore, a first damping hole is formed in the valve sleeve and close to the front end of the valve sleeve, and the first chamber is communicated with the fuel circulation channel through the first damping hole.
Further, the outlet orifice part of the valve body and the V-V groove part of the valve body have the same diameter.
Further, a plurality of grooves are arranged on the same cross section, or adjacent grooves are arranged in a staggered manner front and back.
Further, the diameter of the outlet hole part of the valve body is matched with the bottom diameter of the V-V groove part of the valve body.
The invention also discloses a rocket-based combined cycle engine secondary fuel speed regulating valve which is characterized by comprising the secondary fuel speed regulating valve secondary throttling pair, a primary throttling pair and an engine outer shell, wherein the primary throttling pair and the secondary throttling pair are upwards connected in front and back and are sleeved in the engine outer shell, and a fuel circulation channel with a closed rear end is formed between the primary throttling pair and the outer shell and between the secondary throttling pair and the outer shell.
The first-stage throttling pair comprises: the primary throttling pair inner shell is a cylindrical shell which is axially arranged and two ends of the cylindrical shell are opened, a primary throttling valve port is radially formed in the side wall of the rear section of the primary throttling pair inner shell and is used for communicating the inner cavity of the cylindrical shell with a fuel circulation channel; the first-stage movable valve sleeve is a columnar shell with two open ends, is coaxially and tightly sleeved outside the first-stage throttling auxiliary inner shell body and can slide back and forth outside the first-stage throttling auxiliary inner shell body so as to change the size of the first-stage throttling valve port.
The invention has the beneficial effects that: when the secondary fuel flow of front end takes place big change, form pressure differential in first cavity and second cavity, and the intercommunication through the recess, fuel flows in the fuel flow leads to the passageway, because the shape and the number setting of recess, movable valve cover displacement scope is not big, therefore the expanding spring warp little, the pressure differential force change of balancing with it is also little, so the pressure differential of front end one-level throttle valve port has effectively been stabilized to the second grade throttle pair, the pressure differential precision of one-level throttle valve port has effectively been guaranteed, it is high with one-level throttle valve port area linearity to make governing valve flow and one-level throttle valve port area in wide working range, make secondary fuel flow control simple structure reliable.
[ description of the drawings ]
FIG. 1 is a schematic structural diagram of a secondary throttling pair of a secondary fuel speed regulating valve of a rocket-based combined cycle engine according to the invention;
FIG. 2 is a graph of the V-groove axial and radial throttle area positions;
FIG. 3 is a graph showing the relationship between the throttle area of the V-shaped groove and the change of the opening degree;
FIG. 4 is a layout view of a V-V groove;
4a is a structural schematic diagram of symmetrically arranged V-V grooves;
4b is a structural schematic diagram when the angles of the adjacent V-V grooves are different;
FIG. 5 is a schematic structural diagram of a secondary fuel speed regulating valve of a rocket-based combined cycle engine.
Wherein: 1-1. outer shell; 1-2 inner housings; 2. a movable valve housing; 3. a valve body outlet orifice component; 4. a valve body V-V groove component; 5-1, small V-shaped groove; 5-2, a large V-shaped groove; 6. an outflow hole; 7. a first-stage throttle valve port; 8. a tension spring; 9. a primary throttling pair inner shell; 10. a primary movable valve sleeve; 11. a second orifice; 12. a first orifice.
[ detailed description ] embodiments
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The embodiment discloses a rocket-based combined cycle engine secondary fuel speed regulating valve secondary throttling pair, as shown in fig. 1, for being placed in a fuel circulation passage, comprising: a valve housing 2, a valve body outlet orifice member 3 and a valve body V-V groove member 4 which are coaxially arranged; the valve body V-V groove component 4 is a cylindrical body, the outer wall of the front section of the valve body V-V groove component is axially provided with one or more grooves which are uniformly distributed in a surrounding way; the grooves are arranged on the same section, or the adjacent grooves are arranged in a staggered manner front and back. The rear end of the valve body V-V groove component 4 is welded or connected with the outer shell 1-1 through a flange.
The outlet hole component 3 of the valve body is a cylindrical shell with a closed front end and is arranged at the front end of the V-V groove component 4 of the valve body, and the inner cavity of the cylindrical shell is communicated with a fuel circulation channel through grooves; the outer wall of the valve body outlet hole part 3 is provided with at least one radial outflow hole 6 for guiding out the fuel in the inner cavity along the radial direction and flowing into a combustion chamber. The valve sleeve 2 is a columnar shell with a closed front end, is tightly sleeved outside the valve body outlet hole part 3 and the valve body V-V groove part 4, and forms a first chamber with the front end of the valve body outlet hole part 3, and the first chamber is communicated with the fuel circulation channel; the rear end of the valve sleeve 2 and each groove form a secondary throttle valve port, a telescopic spring 8 is axially arranged between the valve sleeve 2 and the end surface of the outlet hole part 3 of the valve body, a first damping hole 12 is formed in the valve sleeve 2 and close to the front end of the valve sleeve, and the first chamber is communicated with a fuel circulation channel through the first damping hole 12. The rear end of the valve body V-V groove component 4 is connected with the outer shell 1-1 through threads or flanges.
The fuel injection valve also comprises an inner shell 1-2 which is a shell with an opening at the rear end, is tightly sleeved on the outer wall of the front section of the valve sleeve 2, and forms a second chamber with the valve sleeve 2, and the second chamber is communicated with the fuel circulation channel; a second damping hole 11 is axially formed in the front end of the inner shell 1-2, and the second cavity is communicated with the fuel circulation channel through the second damping hole 11; a pressure difference force is formed between the second chamber and the first chamber, and the valve sleeve 2 can slide back and forth along the axial direction under the action of the pressure difference force and the spring pressing force so as to change the size of the secondary throttle valve port. The diameter of the valve body outlet orifice member 3 corresponds to the diameter of the valve body V-V groove member 4. In order to change the flow resistance of the secondary throttle valve port in a large range when the valve sleeve 2 moves, the shape of each groove is as follows: the front and the back are provided with a small V-shaped groove 5-1 and a big V-shaped groove 5-2 with openings facing forwards, and the included angle of the small V-shaped groove 5-1 is smaller than that of the big V-shaped groove 5-2. The section of the small V-shaped groove 5-1 and the section of the big V-shaped groove 5-2 are arc-shaped, and the degree of the included angle of the small V-shaped groove 5-2 is not less than 10 degrees, so that the fuel can enter the secondary throttle valve port more stably.
The angles of the small V-shaped grooves 5-2 and the large V-shaped grooves 5-1 are determined according to the required flow rate of the fuel. In the valve body V-V groove part 4, one mode is that the included angles of the included angle ends of the small V-shaped grooves 5-2 are equal in two adjacent grooves, the included angles of the included angle ends of the large V-shaped grooves 5-1 are equal, and a plurality of grooves are arranged on the same cross section or the adjacent grooves are arranged in a staggered mode in the front and back direction. As shown at 4a in fig. 4.
In another form, in two adjacent grooves, the included angles of the included angle ends of the small V-shaped grooves 5-2 are not equal, the included angles of the included angle ends of the large V-shaped grooves 5-1 are not equal, and a plurality of grooves are arranged on the same cross section, or the adjacent grooves are staggered back and forth. As shown at 4b in fig. 4.
In practical design, the included angle of the included angle end of the small V-shaped groove 5-2 is not less than 100When a plurality of V-shaped grooves are arranged at the included angle of the large V-shaped groove 5-1 according to a circle, the axial directions do not interfere with each other.
The invention also discloses a secondary fuel speed regulating valve of the rocket-based combined cycle engine, which is characterized by comprising the secondary fuel speed regulating valve secondary throttling pair, a primary throttling pair and an engine outer shell 1-1, wherein the primary throttling pair and the secondary throttling pair are upwards connected in front and back and are sleeved in the engine outer shell 1-1, and a fuel circulation channel with a closed rear end is formed between the primary throttling pair and the secondary throttling pair and the outer shell 1-1.
The first-stage throttling pair comprises: the primary throttling pair inner shell 9 is a columnar shell which is axially arranged and two ends of which are open, and a primary throttling valve port 7 is radially arranged on the side wall of the rear section of the columnar shell; the primary throttle valve port 7 is used for communicating the inner cavity of the columnar shell with a fuel circulation channel; the fuel flows into the rear end from the front end in the shell and flows into the second chamber and the fuel circulation channel; the primary movable valve sleeve 10 is a columnar shell with two open ends, is coaxially and tightly sleeved outside the primary throttling secondary inner shell 9, and can slide back and forth outside the primary throttling secondary inner shell 9 through the driving of an actuating mechanism so as to change the size of the primary throttling valve port 7; a pressure difference is formed between the second chamber and the first chamber, and the movable valve sleeve 2 is driven to slide back and forth under the action of the pressure difference force and the spring pressing force.
The working process of the secondary fuel speed regulating valve secondary throttling pair of the rocket-based combined cycle engine in the embodiment is as follows: after the secondary fuel flows through the turbine pump, the pressure is increased by the pump, so that the secondary fuel can flow and enter the shell from the front end of the primary throttling secondary inner shell 9, and the pressure is p1And the secondary fuel flows from the front to the back, flows into the groove from the secondary throttle valve port and flows into the combustion chamber through the outflow hole 6, and in the moving process of the movable valve sleeve 2, the secondary fuel can enter the second chamber through the second damping hole 11 and enters the first chamber through the first damping hole 12. In the dynamic adjustment process, the pressure in the first chamber is smaller than the pressure in the second chamber, a pressure difference exists between the first chamber and the second chamber, and the movable valve sleeve 2 moves under the action of the pressure difference and the extension spring 9 until a stable state is reached. When the working state is stable, the movable valve sleeve 2 does not move any more, and the pressure of the first chamber and the pressure of the second chamber are respectively p2And p1。
In order to verify the characteristics of the flow area of the secondary throttling pair of the secondary fuel speed regulating valve, the following calculation is carried out, as shown in fig. 2 and 3, the distance between the rear end of the small V-shaped groove 5-2 and the rear end of the valve sleeve 2 is set to be x, namely the opening degree of the secondary throttling pair is set to be x, as shown in fig. 3, at the moment, the inlet surface of the secondary throttling valve port is defined as a throttling surface A2The outlet surface of the second-stage throttle valve port is a throttle surface A1Calculating the throttle area A of the V-shaped groove from the geometric relationship1、A2And the calculated equivalent throttle area obtained by calculating the series flow resistance is in a change relation with the valve port opening x, as shown in figure 3. And throttle area A2Comparing with the calculated equivalent valve port throttle area, the throttle area A1The valve port is always minimum in the full-opening range, and the throttling loss is concentrated on A1Two ends, area A2The opening degree of the valve port is increased rapidly and is always greater than A1And basically does not play a throttling role. Area A1And A2Equivalent valve port area in series and A1Very close, also indicates that the flow resistance is mainly from A1The size of the area is determined.
By setting parameters such as included angle theta, groove depth H, groove length L and the like of V-V type grooves with different sizes, a proper change relation dA between the throttle area of the valve port and the opening degree of the valve port can be obtained1Dx, small V-groove section, dA1The value of/dx is small, the throttle area and the change rate of the area are small, the flow of the passing fuel is small, and the large throttle loss exists; large V-shaped groove sections, dA1The value of/dx is larger, corresponding to larger throttle area and area change rate, the passing fuel flow is large and the pressure drop is low, so that the displacement range of the movable valve sleeve 2 is not large in the working condition range of large change of the secondary fuel flow, the deformation of the expansion spring 8 is not large, the pressing force of the spring is not large, and the pressure difference ((p) is balanced with the pressing force of the spring and is not large1-p2) The area of the front end of the outlet orifice member 3 of the valve body) does not vary much. When the fuel flow of the primary adjusting pair is changed greatly, the movable valve sleeve 2 of the secondary adjusting pair moves to adjust the size of the secondary throttle valve port, so that the pressure difference adjusting precision of the primary adjusting pair is ensured. Therefore, by adopting the secondary throttling pair, when the secondary fuel is changed greatly, the displacement range of the movable valve sleeve 2 is not large, so that the deformation of the expansion spring 8 is not large, and the V-V groove of the secondary throttling pair effectively stabilizes the pressure difference of the primary valve port.
Test examples
Aiming at the integrated propellant supply system of a first-stage kerosene/liquid oxygen RBCC engine of a certain two-stage orbit, the invention adopts a secondary fuel speed regulating valve and a secondary throttling pair of a rocket-based combined cycle engine, a fuel gas generator and a turbopumpAnd the turbine pump is connected with a fuel storage tank pipeline and pumps the fuel into an inlet of the primary throttling pair 9. A system simulation model comprising a fuel gas generator and a turbopump is built based on EASY5 software, and injection modes Ma0.6 shown in table 1 are taken as system design points. The design points and the other 3 non-design point conditions in table 1 were simulated. The design point of the secondary fuel speed regulating valve is taken at the overfire section Ma6, the secondary valve port of the secondary fuel speed regulating valve is provided with 3V-V valve ports, and the theta angles of the small V-V grooves and the large V-V grooves are respectively 600And 1000. The design point is taken as Ma6, the simulation results of the operating parameters of the secondary fuel speed regulating valve under several typical working conditions are listed in the table 1, and the flow data in the table are subjected to dimensionless treatment by taking the expected flow of the design point as a reference. As can be seen from Table 1, in the variation range of the valve inlet and outlet pressure difference of 14.21-5.55 MPa and the corresponding flow rate of 21.5% -100%, the flow rate is accurately controlled by changing the area of the first-level valve port, the flow rate and the area of the first-level valve port are in a linear relation, and the flow rate regulation error is not more than 1%. The V-V groove of the secondary throttling pair effectively stabilizes the pressure difference of the primary valve port in the large variation range of the flow and the pressure.
TABLE 1 simulation results for secondary fuel governor valve
The invention provides a secondary fuel speed regulating valve secondary throttling pair of a rocket-based combined cycle engine, which determines the combination form of one or more V-shaped valve ports according to the working parameters of the flow and pressure of secondary fuel in a working condition range, selects the geometrical parameters such as the length, the depth, the included angle and the like of a V-shaped groove to form the appropriate area gradient of the secondary valve port of the speed regulating valve, effectively ensures the pressure difference precision of the primary valve port, ensures the linearity of the flow of the speed regulating valve and the overflowing area of the primary valve port to be high in a wide working range, ensures the control structure of the secondary fuel flow to be simple and reliable, further simplifies the overall control structure of the engine, and greatly reduces the structural.
The secondary fuel speed regulating valve secondary throttling pair of the rocket-based combined cycle engine provided by the invention has the advantages that the secondary valve port can keep the high enough regulating precision of the pressure difference of the primary throttling port under the working condition of wide range and complex change, the hydraulic impact is small, the flow stability is good, the overflowing flow of the secondary fuel can be changed by only regulating the overflowing area of the primary throttling valve port 7, the regulating relation of the primary throttling valve port 7 is simple, the flow closed-loop control is not needed, the secondary flow regulating control structure is simplified, the control structure of the whole engine system is simplified, and the working reliability of the engine is improved.
Claims (9)
1. Rocket base combined cycle engine secondary fuel governing valve second grade throttle is vice, its characterized in that for place in the fuel circulation passageway, include: the valve comprises a movable valve sleeve (2), a valve body outlet hole component (3) and a valve body V-V groove component (4) which are coaxially arranged;
the valve body V-V groove part (4) is a cylindrical body, the outer wall of the front section of the valve body V-V groove part is axially provided with a groove, and the grooves are one or more grooves which are uniformly distributed in a surrounding manner;
the outlet hole part (3) of the valve body is a cylindrical shell with a closed front end and is arranged at the front end of the V-V groove part (4) of the valve body, and the inner cavity of the cylindrical shell is communicated with the fuel circulation channel through each groove; the outer wall of the valve body outlet hole component (3) is provided with at least one radial outflow hole (6) for radially guiding out the fuel in the inner cavity;
the movable valve sleeve (2) is a cylindrical shell with a closed front end, is tightly sleeved outside the valve body outlet hole component (3) and the valve body V-V groove component (4), and forms a first chamber with the front end of the valve body outlet hole component (3), and the first chamber is communicated with a fuel circulation channel; the rear end of the movable valve sleeve (2) and the grooves form a secondary throttle valve port, and the movable valve sleeve (2) can slide back and forth along the axial direction to change the size of the secondary throttle valve port.
2. The rocket-based combined cycle engine secondary fuel governing valve two-stage throttling pair of claim 1, characterized in that, it further comprises an inner shell (1-2) which is a shell with an open rear end, and is tightly sleeved on the outer wall of the front section of the movable valve sleeve (2), and forms a second chamber with the movable valve sleeve (2), and the second chamber is communicated with a fuel circulation channel; a second damping hole (11) is axially formed in the front end of the inner shell (1-2), and the second cavity is communicated with the fuel circulation channel through the second damping hole (11); and a pressure difference is formed between the second chamber and the first chamber and is used for driving the movable valve sleeve (2) to slide back and forth.
3. A rocket-based combined cycle engine secondary fuel governor valve secondary throttling pair according to claim 1 or 2, characterized in that each of said grooves is shaped as: the front and back of the device are provided with a big V-shaped groove (5-2) and a small V-shaped groove (5-1) with openings facing forward, and the included angle of the small V-shaped groove (5-1) is smaller than that of the big V-shaped groove (5-2).
4. The rocket-based combined cycle engine secondary fuel governing valve secondary throttling pair according to claim 3, characterized in that the section of the small V-shaped groove (5-1) and the large V-shaped groove (5-2) is arc-shaped, and the degree of the included angle of the small V-shaped groove (5-1) is not less than 10 °.
5. A rocket based combined cycle engine secondary fuel governor valve secondary throttle pair according to claim 1 or 2, characterized in that a telescopic spring (8) is axially arranged between the movable valve sleeve (2) and the end face of the valve body outlet orifice part (3).
6. A rocket based combined cycle engine secondary fuel governor valve secondary throttling pair according to claim 1 or 2, characterized in that a first orifice (12) is opened on the movable valve sleeve (2) near its front end, and the first chamber is communicated with the fuel circulation passage through the first orifice (12).
7. A rocket based combined cycle engine secondary fuel governor valve secondary throttle pair according to claim 1 or 2, characterized in that the valve body exit orifice part (3) and the valve body V-V groove part (4) are of uniform diameter.
8. The rocket-based combined cycle engine secondary fuel governing valve secondary throttling pair of claim 7, wherein a plurality of grooves are in the same cross section, or adjacent grooves are staggered back and forth.
9. The rocket-based combined cycle engine secondary fuel speed regulating valve is characterized by comprising the secondary fuel speed regulating valve secondary throttling pair of any one of claims 1 to 8, a primary throttling pair and an engine outer shell (1-1), wherein the primary throttling pair and the secondary throttling pair are upwards connected in front and back and are sleeved in the engine outer shell (1-1), and a fuel circulation channel with a closed rear end is formed between the primary throttling pair and the secondary throttling pair and the outer shell (1-1);
the primary throttling pair comprises:
the primary throttling pair inner shell (9) is a cylindrical shell which is axially arranged and two ends of which are open, and a primary throttling valve port (7) is radially arranged on the side wall of the rear section of the primary throttling pair inner shell; the primary throttle valve port (7) is used for communicating the inner cavity of the columnar shell with the fuel circulation channel; the fuel flows into the rear end from the front end in the shell and flows into the second chamber and the fuel circulation channel;
the primary movable valve sleeve (10) is a columnar shell with two open ends, is coaxially and tightly sleeved outside the primary throttling pair inner shell (9), and can slide back and forth outside the primary throttling pair inner shell (9) to change the size of the primary throttling valve port (7);
and a pressure difference force is formed between the second chamber and the first chamber and is used for driving the movable valve sleeve (2) to slide back and forth.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911099213.3A CN110953089B (en) | 2019-11-12 | 2019-11-12 | Secondary throttling pair of secondary fuel speed regulating valve of rocket-based combined cycle engine |
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| CN201911099213.3A CN110953089B (en) | 2019-11-12 | 2019-11-12 | Secondary throttling pair of secondary fuel speed regulating valve of rocket-based combined cycle engine |
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| CN110953089B CN110953089B (en) | 2020-09-15 |
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| CN111577682A (en) * | 2020-05-19 | 2020-08-25 | 华侨大学 | Two-way speed regulating valve based on variable pressure difference active control |
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| EP0614006B1 (en) * | 1993-02-26 | 1997-05-02 | Societe Europeenne De Propulsion | Intermitting propergol injection system |
| CN1664380A (en) * | 2005-03-17 | 2005-09-07 | 浙江大学 | Flow-blocking supercharging throttle valve using a dummy club |
| CN201461568U (en) * | 2009-05-15 | 2010-05-12 | 上海豪高机电科技有限公司 | Full-thread cartridge high-flow digital hydraulic speed control valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111577682A (en) * | 2020-05-19 | 2020-08-25 | 华侨大学 | Two-way speed regulating valve based on variable pressure difference active control |
| CN111577682B (en) * | 2020-05-19 | 2022-03-04 | 华侨大学 | Two-way speed regulating valve based on variable pressure difference active control |
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| CN110953089B (en) | 2020-09-15 |
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