CN213540586U - Pressure relief device for stabilizing mass flow to rocket engine gas supply - Google Patents
Pressure relief device for stabilizing mass flow to rocket engine gas supply Download PDFInfo
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- CN213540586U CN213540586U CN202022840240.6U CN202022840240U CN213540586U CN 213540586 U CN213540586 U CN 213540586U CN 202022840240 U CN202022840240 U CN 202022840240U CN 213540586 U CN213540586 U CN 213540586U
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Abstract
The utility model discloses a pressure relief device for being directed at rocket engine gas supply device stabilizes mass flow, include: the device comprises a shell, a vertical arrangement, a pressure reducing valve core and a piston, wherein an air flow channel is vertically arranged in the shell, an air inlet is arranged on the side wall of the lower end of the shell, an air outlet is arranged on the side wall of the middle part of the shell, the air flow channel is communicated with a gas supply device through the air inlet, the air flow channel is communicated with a nozzle of a rocket engine through the air outlet, the pressure reducing valve core is in a shuttle shape, the vertical arrangement is arranged in a way of penetrating through the inner cavity of a reset spring, a sealing block is positioned above the pressure reducing valve core, the center of the sealing block is provided with an adjusting hole for the upper end of the pressure reducing valve core to pass through, the outer wall of the sealing block is; the utility model discloses according to the medium temperature, compensate the gas pressure of gas outlet, greatly reduced gas supply system's mass flow change.
Description
Technical Field
The utility model belongs to rocket engine gas medium measures the regulation field, especially relates to a pressure relief device who is used for stabilizing mass flow to rocket engine gas supply device.
Background
The gas supply and regulation system of the rocket engine is a system for providing various gases for the operation of the engine through a storage tank valve combination, an electromagnetic valve, a pipeline and the like. The gas supply and regulation system mainly comprises a pump valve regulation scheme and a gas bottle decompression scheme, wherein the pump valve regulation scheme has large flow, good regulation performance but complex system and heavy weight, and is generally used for engines with complex working conditions; the gas cylinder decompression scheme reduces the high gas pressure of the gas cylinder into the gas with the pressure required by the engine to provide oxygen for the engine to work.
No matter what kind of gas is supplied, high-pressure gas is converted into low-pressure gas through a pressure reducer after a high-pressure gas cylinder, and elements such as a buffer, a sonic nozzle and the like are added according to different system requirements. The typical gas supply system comprises a controller, a gas cylinder, an electromagnetic stop valve, a pressure reducing valve, a pressure sensor before measurement, a sonic nozzle, a temperature sensor after measurement and a connector leading to a combustion chamber, wherein gas flows out of the gas cylinder, the electromagnetic stop valve controls whether the gas is led to a subsequent component or not, if the electromagnetic stop valve is opened, the gas outputs stable pressure after passing through the pressure reducing valve and then leads to the combustion chamber after passing through the sonic nozzle, and the pressure sensors are arranged in front of and behind the sonic nozzle.
The volume flow of the gas is only related to the pressure in front of the nozzle and the throat area due to the characteristics of the sonic nozzle, and when the pressure in front of the nozzle is constant, the volume flow of the gas is also constant. However, although the gas supply path, especially the oxidant supply path and the sonic nozzle can ensure stable volume flow, the temperature of the gas path including the gas cylinder outlet, the front and the back of the pressure reducing valve and the whole gas path is changed, and according to the gas characteristics, under the working environmental condition of the gas supply system, the density of the gas is greatly influenced by the temperature, so that the mass flow is greatly changed, and the performance of the engine is greatly influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a pressure relief device for being directed at rocket engine gas supply device stabilizes mass flow to solve the gas mass flow that current gas supply system supplied with and cause the great problem of error because of temperature variation.
The utility model adopts the following technical scheme: pressure reducing device for stabilizing mass flow to a rocket engine gas supply, comprising:
a shell which is vertically arranged, wherein an airflow channel is vertically arranged in the shell, the side wall of the lower end of the shell is provided with an air inlet, the side wall of the middle part of the shell is provided with an air outlet, the airflow channel is communicated with an air supply device through the air inlet, the airflow channel is communicated with a nozzle of a rocket engine through the air outlet,
the pressure reducing valve core is in a shuttle shape, is vertically arranged and penetrates through the inner cavity of the reset spring,
a sealing block which is arranged above the pressure reducing valve core, the center of the sealing block is provided with an adjusting hole for the upper end of the pressure reducing valve core to pass through, the outer wall of the sealing block is fixedly connected with the inner wall of the air flow channel,
the piston is positioned above the sealing block, the lower end of the piston is propped against the upper end of the pressure reducing valve core, the upper end of the piston is fixedly connected with a pressure regulating spring,
the temperature compensation piece is located the pressure regulating spring top for make pressure regulating spring compression volume change through deformation, and then change pressure regulating spring elasticity and make piston up-and-down motion, stretch into the length of regulation hole to the fusiform upper end of decompression case and adjust, then adjust the gap between the upper end outer wall of decompression case and the regulation hole, and then adjust the gas pressure after through this gap.
Furthermore, a push rod is further arranged between the temperature compensation piece and the piston, the longitudinal section of the push rod is T-shaped, the transverse section of the push rod is abutted against the temperature compensation piece, the vertical section of the push rod extends into the inner cavity of the pressure regulating spring, and the transverse section of the push rod drives the vertical section of the push rod to move upwards or downwards after being deformed by the temperature compensation piece, so that the piston moves upwards or downwards.
Furthermore, the longitudinal section of the piston is T-shaped, the transverse section of the piston is fixedly connected with the pressure regulating spring, the free end of the vertical section of the piston is provided with a groove which is sunken upwards, and the upper end of the groove, which is used for the pressure reducing valve core, extends into the groove and ensures that the upper end of the pressure reducing valve core is supported in the groove, so that the pressure reducing valve core moves upwards or downwards along with the piston.
Furthermore, a valve cover is fixedly connected above the temperature compensation sheet.
Further, the air outlet is located below the pressure regulating spring.
The utility model has the advantages that: the utility model compensates the gas pressure of the gas outlet according to the medium temperature, greatly reduces the mass flow change of the gas supply system, improves the combustion efficiency of the engine, and simultaneously improves the performance, the economy and the reliability of the engine; the gas mass flow is compensated through a mechanical principle, so that the complexity of the system is reduced, the control calculation difficulty is simplified, and the metering precision is improved; can output gas with stable mass flow.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein: 1. a housing; 2. a return spring; 3. a pressure reducing valve core; 4. a sealing block; 5. a piston; 6. a temperature compensation sheet; 7. a top rod; 8. a valve cover; 9. a pressure regulating spring; 10. an air inlet; 11. an air outlet; 12. an air flow channel; 13. and (4) a groove.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model discloses a pressure relief device for stabilizing mass flow to rocket engine gas supply device, as shown in fig. 1, including casing 1, decompression case 3, sealing block 4, piston 5, temperature compensation piece 6, the vertical setting of casing 1, casing 1 is the strip, and vertical airflow channel 12 of having seted up in casing 1, air inlet 10 has been seted up to casing 1 lower extreme lateral wall, has seted up gas outlet 11 on the lateral wall of casing 1 middle part, and airflow channel 12 passes through air inlet 10 and gas supply device intercommunication, and airflow channel 12 passes through gas outlet 11 and rocket engine's nozzle intercommunication.
The vertical setting of decompression case 3, decompression case 3 are fusiformis, and 2 inner chambers at reset spring are worn to establish by decompression case 3, the vertical setting of reset spring 2, and reset spring 2 is located air current passageway 12, and gas outlet 11 is located pressure regulating spring 9 below. The sealing block 4 is positioned above the pressure reducing valve core 3, the center of the sealing block 4 is provided with a regulating hole for the upper end of the pressure reducing valve core 3 to pass through, and the outer wall of the sealing block 4 is fixedly connected with the inner wall of the air flow channel 12.
Piston 5 is located 4 tops of sealed piece, 5 lower extremes of piston support the upper end at decompression case 3, 5 upper end fixedly connected with pressure regulating spring 9 of piston, temperature-compensated piece 6 is located pressure regulating spring 9 tops, temperature-compensated piece 6 is used for making through deformation pressure regulating spring 9 reduction change, and then change pressure regulating spring 9 elasticity and make piston 5 up-and-down motion, the length that stretches into the regulation hole is adjusted to the fusiformis upper end of decompression case 3, then adjust the gap between the upper end outer wall of decompression case 3 and the regulation hole, and then adjust the pressure of the gas after through this gap. The gas pressure after passing through the gap and the elastic force of the return spring 2 act on the lower end of the piston 5, the elastic force of the pressure regulating spring 9 acts on the upper end of the piston 5, and the piston 5 and the valve core are in a stable state when the force of the piston 5, the force of the return spring and the force of the pressure regulating spring are balanced.
Still be provided with ejector pin 7 between temperature-compensated piece 6 and the piston 5, the longitudinal section of ejector pin 7 is T shape, the horizontal section of ejector pin 7 supports on temperature-compensated piece 6, the vertical section of ejector pin 7 stretches into pressure regulating spring 9 inner chamber, the horizontal section of ejector pin 7 receives the deformation back of temperature-compensated piece 6, drive the vertical section of ejector pin 7 upwards or downstream, and then make piston 5 upwards or downstream, the top fixedly connected with valve gap 8 of temperature-compensated piece 6, temperature-compensated piece 6 is located valve gap 8 below.
The longitudinal section of piston 5 is T shape, and the horizontal section and the pressure regulating spring 9 fixed connection of piston 5, the free end of the vertical section of piston 5 are provided with the sunken recess 13 that makes progress, and recess 13 is used for the upper end of decompression case 3 to stretch into and guarantees that the upper end of decompression case 3 supports in recess 13 for decompression case 3 is along with piston 5 upwards or downstream.
The utility model is used for replace the pressure relief device among the conventional gas supply device, because gas supply device generally is not used for exporting the gas of stabilizing mass flow, only need keep system outlet pressure invariable can, and the utility model discloses then can export the gas of stabilizing mass flow, compensate this shortcoming of gas supply device.
The utility model discloses well high-pressure gas gets into by the air inlet 10 that is located 1 bottom of casing, upwards flows behind the gap between the upper end outer wall of decompression case 3 and the regulation hole, and the gas pressure of output, 2 elasticity of reset spring and 9 elasticity of pressure regulating spring are balanced, consequently can guarantee the stable gas of output pressure, at the within range of expectation.
The ejector rod 7 is arranged below the temperature compensation sheet 6, when the temperature of the gas changes, the thickness of the temperature compensation sheet 6 changes, so that the pressure of the gas at the gas outlet 11 changes, and the pressure in front of the sonic nozzle changes.
For the temperature compensation pieces 6, the compensation effect can be improved by connecting different numbers of temperature compensation pieces 6 in parallel and in series, the temperature compensation pieces 6 can be replaced by corrugated pipes with temperature sensitivity, and when the gas density variation range is small, the corrugated pipes can be selected to increase the metering precision; the gas medium can be oxygen, hydrogen and other common gases, and when the types of the gases are different, the thickness change rate of the temperature compensation sheet 6 is in positive correlation or negative correlation with the gas temperature according to the gas characteristics; if the gas supply device is provided with a plurality of metering spray pipes which are connected in parallel, a stop valve can be arranged in front of each metering spray pipe, the controller receives state information of the metering device and expected index information of a controlled object, and a stop valve control signal is calculated through a preset algorithm; the metering flow is adjusted by controlling the on-off of each stop valve.
The above description is only for the preferred embodiment of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (5)
1. Pressure reducing device for stabilizing mass flow to a rocket engine gas supply, comprising:
the rocket engine comprises a shell (1) which is vertically arranged, an airflow channel (12) is vertically arranged in the shell, the side wall of the lower end of the shell is provided with an air inlet (10), the side wall of the middle part of the shell is provided with an air outlet (11), the airflow channel (12) is communicated with an air supply device through the air inlet (10), the airflow channel (12) is communicated with a nozzle of the rocket engine through the air outlet (11),
the pressure reducing valve core (3) is in a shuttle shape, is vertically arranged and penetrates through the inner cavity of the reset spring (2),
a sealing block (4) which is positioned above the pressure reducing valve core (3), the center of which is provided with an adjusting hole for the upper end of the pressure reducing valve core (3) to pass through, the outer wall of the sealing block is fixedly connected with the inner wall of the air flow channel (12),
a piston (5) which is positioned above the sealing block (4), the lower end of the piston is propped against the upper end of the pressure reducing valve core (3), the upper end of the piston is fixedly connected with a pressure regulating spring (9),
temperature compensation piece (6), be located pressure regulating spring (9) top for make pressure regulating spring (9) compression volume change through deformation, and then change pressure regulating spring (9) elasticity and make piston (5) up-and-down motion, stretch into the length of regulation hole to the fusiformis upper end of decompression case (3) and adjust, then adjust the gap between the upper end outer wall of decompression case (3) and the regulation hole, and then adjust the gas pressure after through this gap.
2. The decompression device for stabilizing the mass flow rate of a rocket engine gas supply device according to claim 1, wherein a push rod (7) is further arranged between the temperature compensation plate (6) and the piston (5), the longitudinal section of the push rod (7) is T-shaped, the transverse section of the push rod (7) abuts against the temperature compensation plate (6), the vertical section of the push rod (7) extends into the inner cavity of the pressure regulating spring (9), and the transverse section of the push rod (7) is deformed by the temperature compensation plate (6) to drive the vertical section of the push rod (7) to move upwards or downwards so as to enable the piston (5) to move upwards or downwards.
3. A decompression arrangement for stabilizing the mass flow to a rocket engine gas supply device according to claim 1, characterized in that the longitudinal section of the piston (5) is T-shaped, its transverse section is fixedly connected to the pressure regulating spring (9), the free end of its vertical section is provided with an upwardly concave groove (13), said groove (13) is used for the upper end of the decompression valve core (3) to extend into and ensure that the upper end of the decompression valve core (3) abuts against the groove (13), so that the decompression valve core (3) moves up or down with the piston (5).
4. A decompression arrangement for stabilizing the mass flow to a rocket engine gas supply according to any one of claims 1-3, characterized in that a valve cover (8) is fixedly connected above said temperature-compensating fins (6).
5. Pressure relief device for stabilizing the mass flow to a rocket engine gas supply device according to claim 4, characterized in that said gas outlet (11) is located below the pressure regulating spring (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022840240.6U CN213540586U (en) | 2020-12-01 | 2020-12-01 | Pressure relief device for stabilizing mass flow to rocket engine gas supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022840240.6U CN213540586U (en) | 2020-12-01 | 2020-12-01 | Pressure relief device for stabilizing mass flow to rocket engine gas supply |
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| Publication Number | Publication Date |
|---|---|
| CN213540586U true CN213540586U (en) | 2021-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022840240.6U Active CN213540586U (en) | 2020-12-01 | 2020-12-01 | Pressure relief device for stabilizing mass flow to rocket engine gas supply |
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| CN (1) | CN213540586U (en) |
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- 2020-12-01 CN CN202022840240.6U patent/CN213540586U/en active Active
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