CN105711858A - Pressure-storage frequency-varying device - Google Patents
Pressure-storage frequency-varying device Download PDFInfo
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- CN105711858A CN105711858A CN201610165330.5A CN201610165330A CN105711858A CN 105711858 A CN105711858 A CN 105711858A CN 201610165330 A CN201610165330 A CN 201610165330A CN 105711858 A CN105711858 A CN 105711858A
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- pressure
- end cover
- pneumatic cylinder
- bellows body
- frequency
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- 230000008878 coupling Effects 0.000 claims abstract description 9
- 238000010168 coupling process Methods 0.000 claims abstract description 9
- 238000005859 coupling reaction Methods 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 claims abstract description 5
- 238000009825 accumulation Methods 0.000 claims description 37
- 230000008859 change Effects 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 14
- 238000004880 explosion Methods 0.000 claims description 8
- 238000001802 infusion Methods 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 5
- 238000013016 damping Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005183 dynamical system Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 241000272165 Charadriidae Species 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
- B64G1/40—Arrangements or adaptations of propulsion systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Remote Sensing (AREA)
- Aviation & Aerospace Engineering (AREA)
- Pipe Accessories (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a pressure-storage frequency-varying device which is realized by virtue of the following technical scheme: the upper side of an annular base (10) is provided with a pneumatic cylinder (2) sealed by virtue of a chassis (4); the pneumatic cylinder is capable of pushing a valve shaft (15) fixedly connected with the center of an upper end cover out of a central hole of a flange plate of the pneumatic cylinder by virtue of the upper end cover (1) connected to the pneumatic cylinder; a corrugated pipe assembly (3) is capable of converting external pressure changes into telescopic motion of the upper end cover; the upper end cover compresses the corrugated pipe assembly under the effect of the external pressure changes, the corrugated pipe assembly stretches to push the upper end cover so as to open a valve; fixed frequency generated by volume of an inner cavity of the pneumatic cylinder and the vibration frequency of a transfusion pipeline of a propelling system are changed by virtue of external pressure, so that the generated longitudinal vibration frequency is isolated from the structure frequency, and generation of longitudinal vibration coupling of the propelling system is prevented. The pressure-storage frequency-varying device has the advantage that the strength, flexibility and use temperature range of the corrugated pipe assembly are improved.
Description
Technical field
The present invention relates to a kind of rocket booster that reduces and advance induction system frequency of vibration, it is possible to the pressure accumulation converter plant that the resonance of liquid in booster is fallen to ' suction '.
Background technology
Along with the development of carrier rocket technology, the launch power of rocket is also increasing, causes that the structure longitudinal direction of rocket, local vibration frequency and horizontal frequency are also more and more lower.Due to the interaction of Aircraft structure and propulsion system, liquid rocket is made to produce unstable its form of extensional vibration similar with " stilt walk ", so called after POGO vibration.The stability of propulsion system is relevant with critical damping ratio, when critical damping ratio is more than structural damping ratio, POGO vibration occurs.POGO vibration is the self-excited vibration of a kind of instability being interacted with dynamical system by the structure extensional vibration of large-scale liquid rocket and producing, typical POCO vibration be: when the natural frequency of carrier structure extensional vibration closer to each other with dynamical system vibration natural frequency or equal time, define the self-excited vibration of a kind of closed-loop path.This self-excited vibration amplitude is closed phenomenon with Rhizoma Nelumbinis and is produced extensional vibration coupling, when such vibration occurs, generally with emergentness, so becoming one of significant problem of stability affecting carrier rocket.Suppress the safety frequency window of design also to narrow for longitudinal coupling vibration POGO, produce the restraining device close to an inflated type accumulator of human heart frequency and can not meet design requirement.At present, mainly adopting both at home and abroad and installing the accumulator changing system frequency in propulsion system is put two air bags in the tube chamber of booster by two pictures, the metal pressure accumulation box composition of volume about 1.2 liters, adopt two " air bag " to connect cooperation to reduce frequency of vibration.Rocket is at different mission phases, and the frequency of booster vibration is different, and the ability of accumulator " absorbing " must change with the change of booster frequency of vibration.Accumulator is internal is full of cryogenic liquid, and cryogenic liquid medium enters pipeline and can all vaporize immediately and form bigger pressure.Owing to accumulator vome of shell is little, in Low Temperature Storage depressor vibration test process middle shell, cryogenic media evaporating capacity is relatively big, causes housing pressure wayward.The in use valve shaft easy fracture of accumulator upper end cover.
The present invention is the development further to prior art pressure accumulater and improves.
Summary of the invention
The purpose of present invention invention is for the deficiencies in the prior art part, it is provided that a kind of high intensity, high sensitivity, it is possible to changes frequency and prevents the generation of extensional vibration coupling, it is to avoid the pressure accumulation Frequency device of coupling；It is change infusion pipeline frequency of vibration, makes extensional vibration frequency and the structure frequency isolation of generation, make propulsion system frequency away from structural natural frequencies.
The present invention invents the above-mentioned technical problem of solution and the technical scheme is that a kind of pressure accumulation Frequency device, including: in metal pressure accumulation box 12 inner chamber, it is arranged on the stationary seat 8 on pressure-sensitive chamber dividing plate 6 and the diaphragm group (9 being arranged between stationary seat 8 and ring seat 10, it is characterized in that: at the pneumatic cylinder 2 being arranged over being sealed by chassis 4 and the ring flange being assemblied in pneumatic cylinder 2 of ring seat 10, the built-in corrugated pipe assembly 3 of pneumatic cylinder 2, the combined bellows body 3 upper end cover 1 by connecting on it, the valve shaft 15 connected firmly at upper end cover 1 center stretches out from the ring flange centre bore of pneumatic cylinder 2；Combined bellows body 3 converts external pressure change the stretching motion of upper end cover 1 to, upper end cover 1 compress bellows assembly 3 under the effect of outside change pressure, increases pneumatic cylinder 2 chamber pressure and reduces external change pressure；Combined bellows body 3 stretches, promote upper end cover 1 Open valve, fixed frequency and the propulsion system infusion pipeline frequency of vibration that pneumatic cylinder 2 cavity volume produces is changed, extensional vibration frequency and the structure frequency isolation that will produce, it is prevented that the generation of propulsion system extensional vibration coupling by external pressure.
The present invention has the advantages that compared to prior art.
Intensity is high.The present invention is adopted metal pressure accumulation box and is sealed the metal bellows assembly being built in pneumatic cylinder 2 by chassis 4, and bulk strength is high.Improve the intensity of combined bellows body, sensitivity and use temperature range.
Highly sensitive.The present invention adopts the built-in corrugated pipe assembly 3 of pneumatic cylinder 2, the combined bellows body 3 upper end cover 1 by connecting on it, the valve shaft 15 connected firmly at upper end cover 1 card center stretches out from the ring flange centre bore of pneumatic cylinder 2, combined bellows body 3 converts external pressure change the pressure accumulation Frequency device not only intensity of stretching motion of upper end cover 1 to, sensitivity improves, and the frequency produced is away from human heart frequency.Owing to upper end cover 1 is under the effect of outside change pressure, compress bellows assembly 3, increase pneumatic cylinder 2 chamber pressure, external change pressure reduces, combined bellows body 3 stretches, promoting upper end cover 1 Open valve, combined bellows body 3 changes, by external pressure, fixed frequency and the structure frequency isolation that pneumatic cylinder 2 cavity volume produces, and reliability is greatly improved.Change propulsion system infusion pipeline frequency of vibration, make extensional vibration frequency and the structure frequency isolation of generation, it is therefore prevented that the generation of propulsion system extensional vibration coupling.
The present invention reduces frequency and the critical damping ratio of propulsion system by the cavitation erosion flexibility of combined bellows body increase accumulator, thus suppressing POGO to vibrate, makes system stability.When accumulator is away from pump intake, accumulator cavitation erosion flexibility is insensitive on the impact of propulsion system frequency；When propulsion system frequency and structural natural frequencies couple, structure acceleration vibration amplitude has maximum, the phase contrast between thrust calculation and structural vibration acceleration to be-pi/2.
The present invention utilizes the stretching of combined bellows body 3, compression property, convert external pressure change to upper end cover 1 flexible, combined bellows body 3 compresses, its chamber pressure increases, combined bellows body 3 stretches, upper end cover 1 promotes valve opening, and the rigidity of combined bellows body 3, cavity volume and external pressure determine the frequency of this device, it is possible to use in the temperature range of-70 300 ° of C.
Accompanying drawing explanation
In order to further illustrate rather than limit the above-mentioned implementation of the present invention, below in conjunction with drawings and Examples, the invention will be further described, but does not therefore limit the present invention among described practical range.All these designs should be regarded as this technology disclosure of that and protection scope of the present invention.
Fig. 1 is the organigram of pressure accumulation Frequency device of the present invention.
Fig. 2 is pressure accumulation Frequency device working state schematic representation of the present invention.
Fig. 3 is combined bellows body figure.
In Fig. 1: 1 upper end cover, 2 pneumatic cylinders, 3 combined bellows bodies; 4 chassis, 5 pressure-sensitive chambeies, 6 pressure-sensitive chamber dividing plates; 7 O-ring seals, 8 stationary seats, 9 diaphragm groups; 10 ring seats, 11 overvoltage protection explosion diaphragms, 12 metal pressure accumulation boxes; wave plate on 13,14 times wave plates, 15 valve shafts; 16 pressure accumulation Frequency devices, 17 pressure limiting valves.
Detailed description of the invention
Consult Fig. 1, Fig. 2.In one preferred embodiment of pressure accumulation Frequency device described below, a kind of pressure accumulation Frequency device, including metal pressure accumulation box 12) inner chamber is arranged on the stationary seat 8 on pressure-sensitive chamber dividing plate 6 and the diaphragm group 9 being arranged between stationary seat 8 and ring seat 10.The metal pressure accumulation box 12 that combined bellows body 3, upper end cover 1, pneumatic cylinder 2, chassis 4, explosion diaphragm 11, ring seat 10, diaphragm group 9, stationary seat 8, O-ring seal 7 form.The pneumatic cylinder 2 being arranged over being sealed by chassis 4 of ring seat 10 and be assemblied on pneumatic cylinder 2 ring flange, the built-in corrugated pipe assembly 3 of pneumatic cylinder 2.Described pneumatic cylinder 2 depth of inner cavity determines the amount of tension of combined bellows body 3, and there is the hole being centrally located line upper end, leads to upper end cover 1.Chassis 4 cavity volume determines pressure accumulation ability.Chassis 4 is connected with lower wave plate 14 and explosion diaphragm 11, and when pressure accumulation transships, explosion diaphragm 11 breaks, and protects security of system.It is provided with in the annular groove outside of stationary seat 8 and prevents stationary seat 8 from moving, the O-ring seal 7 in isolating metal pressure accumulation box and pressure-sensitive chamber.Being positioned at pressure-sensitive chamber dividing plate 6 be connected with storage medium and regulate the pressure-sensitive chamber 5 of pressure, when storage medium amount changes, pressure-sensitive chamber 5 volume is more big, and pressure variety is more little.In order to ensure the performance of combined bellows body 3, it is prevented that combined bellows body 3 flow, chassis 4 is shaped with the spacing pylon cylinder of restriction combined bellows body decrement.One atmospheric pressure of combined bellows body 3 chamber pressure.The combined bellows body 3 upper end cover 1 by connecting on it, the valve shaft 15 connected firmly at upper end cover 1 card center stretches out from the ring flange centre bore of pneumatic cylinder 2.Combined bellows body 3 converts external pressure change the stretching motion of upper end cover 1 to, upper end cover 1 under the effect of outside change pressure, compress bellows assembly 3, increase pneumatic cylinder 2 chamber pressure.External change pressure reduces, combined bellows body 3 stretches, promote upper end cover 1 Open valve, combined bellows body 3 changes, by external pressure, the fixed frequency that pneumatic cylinder 2 cavity volume produces, change propulsion system infusion pipeline frequency of vibration, make extensional vibration frequency and the structure frequency isolation of generation, it is prevented that the generation of propulsion system extensional vibration coupling.In order to avoid propulsion system pressure P 1 pressure is excessive; overvoltage protection explosion diaphragm 11 it is provided with between the opening of chassis 4 and ring seat 10 cylinder; overvoltage protection explosion diaphragm 11 is excessive at propulsion system pressure P 1 pressure, breaks when exceeding setting value, unloading pressure protection propulsion system safety.
When the outer cavity pressure of combined bellows body 3 is lower than an atmospheric pressure, combined bellows body 3 stretches, and drives upper end cover 1 to move, and valve shaft 15 pushes valve open, and propulsion system air pressure P1 enters metal pressure accumulation box.When P1 is less than combined bellows body 3 chamber pressure, combined bellows body 3 stretches, and promotes upper end cover 1 Open valve, and consequent air pressure P2 enters propulsion system pipeline, changes propulsion system infusion pipeline frequency of vibration.When propulsion system air pressure P1 is more than combined bellows body 3 chamber pressure, compress bellows assembly 3, after combined bellows body 3 compresses certain altitude, the valve shaft 15 of upper end cover 1 leaves pressure limiting valve 17, pressure limiting valve closing, reduces the P1 air pressure entered, the pressure of metal pressure accumulation box reduces simultaneously, combined bellows body 3 stretches again, and propulsion system reaches pressure balance, it is ensured that P2 is stable.
Consult Fig. 3.The rigidity of this matching requirements combined bellows body is little, pressure height, is divided into upper wave plate 13 and lower wave plate 14 for this combined bellows body 3, for improving the intensity of wave plate, upper wave plate 13 and lower wave plate 14 profile by the waveform arrangement radially extended, selects the materials A M350 of high intensity.Upper end cover 1 is centrally located on axis with valve shaft 15 and is connected with upper wave plate 13, and valve shaft 15 is moved back and forth by the flange disk hole of pneumatic cylinder 2, promotes valve switch.
Claims (12)
1. a pressure accumulation Frequency device, including: metal pressure accumulation box (12) inner chamber is arranged on the stationary seat (8) on pressure-sensitive chamber dividing plate (6) and the diaphragm group (9) being arranged between stationary seat (8) and ring seat (10), it is characterized in that: at the pneumatic cylinder (2) being arranged over being sealed by chassis (4) and the ring flange being assemblied in pneumatic cylinder (2) of ring seat (10), the built-in corrugated pipe assembly (3) of pneumatic cylinder (2), the combined bellows body (3) upper end cover (1) by connecting on it, the valve shaft (15) connected firmly at upper end cover (1) center stretches out from the ring flange centre bore of pneumatic cylinder (2)；Combined bellows body (3) converts external pressure change the stretching motion of upper end cover (1) to, upper end cover (1) compress bellows assembly (3) under the effect of outside change pressure, increases pneumatic cylinder (2) chamber pressure and reduces external change pressure；Combined bellows body (3) stretches, promote upper end cover (1) Open valve, fixed frequency and the propulsion system infusion pipeline frequency of vibration that pneumatic cylinder (2) cavity volume produces is changed by external pressure, by the extensional vibration frequency produced and structure frequency isolation, it is prevented that the generation of propulsion system extensional vibration coupling.
2. by the pressure accumulation Frequency device of the high intensity described in claim 1, it is characterised in that chassis (4) are shaped with the spacing pylon cylinder of restriction combined bellows body decrement.
3., by the pressure accumulation Frequency device described in claim 1, it is characterised in that described pneumatic cylinder (2) depth of inner cavity determines the amount of tension of combined bellows body (3), and there is the hole being centrally located line upper end, lead to upper end cover (1).
4., by the pressure accumulation Frequency device described in claim 1, it is characterised in that one atmospheric pressure of combined bellows body (3) chamber pressure, the valve shaft (15) that upper end cover (1) card center is connected firmly, stretch out from the ring flange centre bore of pneumatic cylinder (2).
5. by the pressure accumulation Frequency device described in claim 1; it is characterized in that; being provided with overvoltage protection explosion diaphragm (11) between the opening of chassis (4) and ring seat (10) cylinder, overvoltage protection explosion diaphragm (11) is excessive at propulsion system pressure P 1 pressure, breaks when exceeding setting value.
6. by the pressure accumulation Frequency device described in claim 1, it is characterised in that be provided with in the annular groove outside of stationary seat (8) and prevent stationary seat (8) mobile, the O-ring seal (7) in isolating metal pressure accumulation box and pressure-sensitive chamber.
7. by the pressure accumulation Frequency device described in claim 1, it is characterised in that being positioned at pressure-sensitive chamber dividing plate (6) and be connected with storage medium and regulate the pressure-sensitive chamber (5) of pressure, when storage medium amount changes, pressure-sensitive chamber (5) volume is more big, and pressure variety is more little.
8. by the pressure accumulation Frequency device described in claim 1, it is characterized in that, when combined bellows body (3) outer cavity pressure is lower than an atmospheric pressure, combined bellows body (3) stretches, drive upper end cover (1) mobile, valve shaft (15) pushes valve open, and propulsion system air pressure P1 enters metal pressure accumulation box.
9. by the pressure accumulation Frequency device described in claim 1, it is characterized in that, when P1 is less than combined bellows body (3) chamber pressure, combined bellows body (3) stretches, promote upper end cover (1) Open valve, consequent air pressure P2 enters propulsion system pipeline, changes propulsion system infusion pipeline frequency of vibration.
10. by the pressure accumulation Frequency device described in claim 1, it is characterized in that, upper end cover (1) is centrally located on axis with valve shaft (15) and is connected with upper wave plate (13), and valve shaft (15) is moved back and forth by the flange disk hole of pneumatic cylinder (2), promotes valve switch.
11. by the pressure accumulation Frequency device described in claim 1, it is characterized in that, combined bellows body (3) is divided into wave plate (13) and lower wave plate (14), for improving the intensity of wave plate, upper wave plate (13) and lower wave plate (14) profile by the waveform arrangement radially extended.
12. by the pressure accumulation Frequency device described in claim 1, it is characterized in that, when propulsion system air pressure P1 is more than combined bellows body (3) chamber pressure, compress bellows assembly (3), after combined bellows body (3) compression certain altitude, the valve shaft (15) of upper end cover (1) leaves pressure limiting valve (17), pressure limiting valve closing, reduces the pressure of P1 air pressure and the metal pressure accumulation box entered, and combined bellows body (3) stretches, propulsion system reaches pressure balance, it is ensured that P2 is stable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610165330.5A CN105711858B (en) | 2016-03-22 | 2016-03-22 | Pressure-accumulation frequency-changing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610165330.5A CN105711858B (en) | 2016-03-22 | 2016-03-22 | Pressure-accumulation frequency-changing device |
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| Publication Number | Publication Date |
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| CN105711858A true CN105711858A (en) | 2016-06-29 |
| CN105711858B CN105711858B (en) | 2023-02-28 |
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| CN201610165330.5A Active CN105711858B (en) | 2016-03-22 | 2016-03-22 | Pressure-accumulation frequency-changing device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106425179A (en) * | 2016-10-09 | 2017-02-22 | 金锋馥（滁州）输送机械有限公司 | Automatic pressing device |
| CN109386371A (en) * | 2017-08-02 | 2019-02-26 | 成都凯天电子股份有限公司 | Control the temperature sensor of bleed temperature-controlling system valve opening |
| CN109741679A (en) * | 2019-02-12 | 2019-05-10 | 成都凯天电子股份有限公司 | The method for preparing frequency correcting apparatus |
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2016
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106425179A (en) * | 2016-10-09 | 2017-02-22 | 金锋馥（滁州）输送机械有限公司 | Automatic pressing device |
| CN106425179B (en) * | 2016-10-09 | 2018-05-01 | 金锋馥（滁州）输送机械有限公司 | Automatic pressing device |
| CN109386371A (en) * | 2017-08-02 | 2019-02-26 | 成都凯天电子股份有限公司 | Control the temperature sensor of bleed temperature-controlling system valve opening |
| CN109386371B (en) * | 2017-08-02 | 2024-05-10 | 成都凯天电子股份有限公司 | Temperature sensor for controlling opening degree of valve of air-inducing temperature-controlling system |
| CN109741679A (en) * | 2019-02-12 | 2019-05-10 | 成都凯天电子股份有限公司 | The method for preparing frequency correcting apparatus |
| CN109741679B (en) * | 2019-02-12 | 2024-02-20 | 成都凯天电子股份有限公司 | Method for preparing frequency correction device |
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| Publication number | Publication date |
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| CN105711858B (en) | 2023-02-28 |
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