CN106500992B - A kind of drainage engine kerosene servo mechanism ground experiment method - Google Patents
A kind of drainage engine kerosene servo mechanism ground experiment method Download PDFInfo
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- CN106500992B CN106500992B CN201610839571.3A CN201610839571A CN106500992B CN 106500992 B CN106500992 B CN 106500992B CN 201610839571 A CN201610839571 A CN 201610839571A CN 106500992 B CN106500992 B CN 106500992B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/202—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material using mass spectrometer detection systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- Examining Or Testing Airtightness (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of drainage engine kerosene servo mechanism ground experiment methods, belong to servo mechanism technical field.First, kerosene is replaced using aircraft fluid, dynamic test is carried out to servo mechanism hydraulic motor；Then, kerosene displacement is carried out to servo mechanism hydraulic motor；Finally, positive pressure detection air-leakage test and detection of negative pressure air-leakage test is respectively adopted.Engine kerosene source is replaced using the ground hydraulic energy, Surface power drive test is carried out to hydraulic motor, principle is simple, and reliability is high, while it is safer to operator to test process；The airtight inspection of positive pressure and negative pressure two ways to drainage link circuit is carried out respectively, fully examines hydraulic motor to external seal positive/negative-pressure sealability, guarantee is provided for reliably working of the servo mechanism in full rocket system.
Description
Technical field
The present invention relates to a kind of drainage engine kerosene servo mechanism ground experiment methods, belong to servo mechanism technology neck
Domain.
Background technology
Servo mechanism is the executing agency of rocket thrust vector controlled, is the Typical Representative of integrated design, is integrated with
Fluid pressure line, Hydraulic Elements, power source, observing and controlling plug etc. are in one.Wherein power source includes hydraulic motor, axial plunger pump
Deng, servo mechanism when working on rocket, fluoroplastics hose connect with engine drainage interface through draining fluids rocket motor
The high pressure kerosene of machine drives hydraulic motor high-speed rotation, power to pass to axial plunger pump by rotor, gives servo mechanism pressurized strut
High pressure oil is provided, drainage kerosene is finished after work(through low-pressure hose return engine system.
As the level-one energy of servo mechanism, drainage engine high pressure kerosene makes hydraulic motor constant speed reliably working be servo
The precondition of structure reliably working, the above-mentioned operating mode for draining engine liquid motivation need adequately to be tested on ground,
To ensure reliably working of the servo mechanism on rocket.Therefore, the ground simulation of operating mode of the servo mechanism on rocket is
The important link of servo mechanism is examined, the most basic index request in drainage engine kerosene servo mechanism drainage circuit is exactly cannot
Oil leak, can not gas leakage, need to carry out pressure test and air tightness test, it is good airtight to ensure that entire drainage circuit has
Property.It is considerably less both at home and abroad using hydraulic motor as the servo mechanism of power at this stage, therefore lack the reference of corresponding means of testing.Separately
Outside, the safety of kerosene medium is relatively low, in addition, the factors such as kerosene medium is more demanding to the design of energy platform, manufacture, once it surveys
Occur danger source during examination and the safety accidents such as explosion easily occur.Accordingly, it is considered to which the factors such as safety, need design a kind of both
Comprehensive and safety, ground experiment method.
Invention content
The technology of the present invention solves the problems, such as：A kind of safe and reliable, comprehensive drainage engine kerosene servo mechanism is provided
Ground experiment method.
The present invention solve the scheme that its technical problem uses for：A kind of drainage engine kerosene servo mechanism ground experiment side
Method, this method comprises the following steps：
(1), kerosene is replaced using aircraft fluid, dynamic test is carried out to servo mechanism hydraulic motor, i.e.,：By hydraulic air
Oil access servo mechanism hydraulic motor, hydraulic air oil pressure is identical as the high pressure coal oil pressure provided in rocket system, adjusts boat
The flow velocity of empty hydraulic oil makes it stable, and tests preset a period of time, and whether the rotating speed r of statistics servo mechanism hydraulic motor meets：
The condition of (reference rotation speed-predetermined deviation)≤r≤(reference rotation speed+predetermined deviation), if it is satisfied, then servo mechanism surge it is motor-driven
Power test passes, otherwise, servo mechanism hydraulic motor dynamic test are unqualified；
(2), kerosene displacement is carried out to servo mechanism hydraulic motor, i.e.,：The hydraulic oil in servo mechanism hydraulic motor is cleaned, until
The purity of the kerosene of servo mechanism hydraulic motor outflow is more than 95%；
(3), positive pressure detects air-leakage test, i.e.,：It is filled with nitrogen into the airtight test loop of servo mechanism, is forced into default
Pressure value, and keep a period of time, later, test helium leak rate, if no more than setting required value, the airtight inspection of positive pressure
Qualification is looked into, otherwise, the airtight inspection of positive pressure is unqualified；
(4), detection of negative pressure air-leakage test, i.e.,：Airtight test loop in servo mechanism hydraulic motor is vacuumized, is checked
Whether the airtight test loop vacuum degree in servo mechanism hydraulic motor can reach preset threshold value, can reach, then detection of negative pressure
Air-leakage test is qualified, and otherwise, detection of negative pressure air-leakage test is unqualified.
The step (1) the specific steps are：
(1.1), it is sequentially connected that ground hydraulic station, speed governing valve is to servo mechanism hydraulic motor oil inlet, then is sequentially connected servo
Mechanism hydraulic motor oil outlet, oily filter to ground hydraulic station, the ground hydraulic station internal reservoir aircraft fluid；
(1.2), it adjusts and is provided in the hydraulic fluid pressure and hydraulic air oil pressure and rocket system that ground hydraulic station exports
High pressure coal oil pressure it is identical, by speed governing valve regulation hydraulic oil flow velocity, make servo mechanism hydraulic motor (5) invariablenes turning speed in [base
Quasi- rotating speed-predetermined deviation, reference rotation speed+predetermined deviation] within；
(1.3), continuance test preset a period of time, and record the rotating speed of servo mechanism hydraulic motor；
(1.4), the stabilization of speed situation for analyzing servo mechanism hydraulic motor, when all tachometer values all meet (reference rotation speed-
Predetermined deviation)≤r≤(reference rotation speed+predetermined deviation) condition when, it is believed that servo mechanism hydraulic motor (5) pressure test is qualified, no
Then, it is believed that servo mechanism hydraulic motor pressure test is unqualified.
On the basis of the step (1.2) predetermined deviation within the 5% of rotating speed.
Preset a period of time described in the step (1.3) is 5min or more.
The step (2) the specific steps are：
(2.1), it is sequentially connected displacement pumping plant, kerosene bucket, oily filter to servo mechanism hydraulic motor oil inlet, connects servo mechanism
Hydraulic motor oil outlet is to wasted oil bucket；
(2.2), control displacement pumping plant, is allowed to draw kerosene from kerosene bucket, kerosene is sent to servo mechanism liquid by oily filter
Motivation is applied with the pressure that can make servo mechanism hydraulic motor rotary motion, driving servo mechanism hydraulic motor rotation, stream to kerosene
The kerosene for crossing servo mechanism hydraulic motor is expelled to wasted oil bucket from the oil outlet of servo mechanism hydraulic motor；
(2.3), the purity of the kerosene of the oil outlet outflow of detection servo mechanism hydraulic motor, until the purity of kerosene is more than
95%.
The step (3) the specific steps are：
(3.1), nitrogen cylinder, shut-off valve, first pressure gauge, pressure reducing valve, second pressure gauge, servo mechanism is sequentially connected to surge
Machine oil inlet, servo mechanism hydraulic motor oil outlet connect seal plug；
(3.2), the switch shut-off valve that control nitrogen pressurizes to hydraulic motor is opened, pressure reducing valve is adjusted, pressure gauge is observed, by gas
Density test circuit is pressurized to 0.5MPa and is kept for a period of time；
(3.3), using the probe of helium mass spectrometer leak detector, at interface tool, at seal plug and thermomechanical components of surging
At part joint surface, helium leak rate is checked, the distance of the probe distance detection site of helium mass spectrometer leak detector is less than
3mm, and detect gait of march it is slowly uniform, if helium leak rate be no more than setting required value, the airtight passed examination of positive pressure,
Otherwise, the airtight inspection of positive pressure is unqualified.
A period of time in the step (3.2) is set as 2min or more.
Required value is 5 × 10 in the step (3.3)-12Pa.m3/ s or less.
Step (4) are implemented as：
(4.1), connection filling platform to servo mechanism hydraulic motor oil inlet, servo mechanism hydraulic motor oil outlet installs seal plug
Head；
(4.2), the airtight test loop in servo mechanism hydraulic motor is vacuumized by filling platform, if vacuum degree can be extracted into
Preset threshold value, then the airtight passed examination of negative pressure, otherwise, negative pressure is airtight check it is unqualified.
Predetermined threshold value described in the step (4.2) is 2000Pa or less.
Compared with the prior art, the invention has the advantages that：
(1), the present invention replaces engine kerosene source using the ground hydraulic energy so that servo mechanism is surged on ground
More safe and reliable when mechanomotive force is tested, when carrying out the drainage airtight detection in circuit, Test coverage face is more comprehensive, principle letter
Single, reliability is high, while the experiment process is safer to operator；
(2), hydraulic power unit of the present invention uses hydraulic oil as medium, than using kerosene as the hydraulic pump of medium in system
More simple in structure, cost is less expensive；
(3), 0.5MPa positive pressure of nitrogen is respectively adopted in the present invention and filling platform vacuumizes negative pressure two ways and realizes to drainage
The airtight inspection of link circuit fully examines hydraulic motor to external seal positive/negative-pressure sealability so that the range covering of detection is more
Comprehensively, testing result is more reliable, and guarantee is provided for reliably working of the servo mechanism in full rocket system.
Description of the drawings
Fig. 1 is present invention drainage engine kerosene servo mechanism ground experiment method flow diagram；
Fig. 2 is present invention drainage engine kerosene servo mechanism hydraulic motor dynamic test schematic diagram；
Fig. 3 is present invention drainage engine kerosene servo mechanism hydraulic motor kerosene principle,displacement figure；
Fig. 4 is present invention drainage engine kerosene servo mechanism positive pressure gas density test schematic diagram；
Fig. 5 is the present invention drainage airtight test schematic of engine kerosene servo mechanism negative pressure.
Specific implementation mode
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Hydraulic motor is the level-one energy that power is provided for servo mechanism, is a part for servo mechanism Power Component, servo
Mechanism drains the high pressure kerosene of rocket engine to the oil inlet of hydraulic motor, the driving of high pressure kerosene is surged when working on rocket
Machine constant speed rotary, and then driving axial plunger pump provides high pressure liquid pressure oil for servo mechanism, completes the position servo of servo mechanism
Control.
As shown in Figure 1, drainage engine kerosene servo mechanism ground experiment method include pressure test, kerosene displacement, just
It calms the anger density test and negative pressure four steps of airtight test.
1. pressure test
The purpose of drainage engine kerosene servo mechanism hydraulic motor pressure test is abundant examination hydraulic motor to outside seal
Air-tightness, vacuumize guarantee be provided in filling process for full rocket.
Drain engine kerosene servo mechanism hydraulic press pressure test the specific steps are：
(1.1), according to connection each equipment of pressure test shown in Fig. 2：Ground hydraulic station 1 connects speed governing valve 3 by hose 2,
Speed governing valve 3 is connected to 5 oil inlet of servo mechanism hydraulic motor, and 5 oil outlet of servo mechanism hydraulic motor connects oily filter 4, and oily filter 4 passes through again
An other hose is connected to ground hydraulic station 1, the ground hydraulic station internal reservoir aircraft fluid, preferably No. 10 aviations
Hydraulic oil；
(1.2), it adjusts and is provided in the hydraulic fluid pressure and hydraulic air oil pressure and rocket system that ground hydraulic station 1 exports
High pressure coal oil pressure it is identical, by speed governing valve 3 adjust hydraulic pressure oil flow rate, make servo mechanism hydraulic motor (5) invariablenes turning speed in [base
Quasi- rotating speed-predetermined deviation, reference rotation speed+predetermined deviation] within；The predetermined deviation is at least within the 5% of reference rotation speed.One
As reference rotation speed be 6000r/min, the pressure of high pressure liquid pressure oil is 24MPa.
The Power Component of servo mechanism includes hydraulic motor and axis upper plug pump, servo mechanism on rocket in the course of work,
By draining the high pressure kerosene of rocket engine output, hydraulic motor rotation, hydraulic motor is driven to connect axial plunger by armature spindle
Pump, and its rotation is driven, and then provide power fluid force feed for servo mechanism 7.
(1.3), continuance test preset a period of time, such as 5min, and record the rotating speed of servo mechanism hydraulic motor 5；
(1.4), the velocity-stabilization situation of the rotating speed of analysis servo mechanism hydraulic motor 5, when all tachometer values all meet (base
Quasi- rotating speed-predetermined deviation)≤r≤(reference rotation speed+predetermined deviation) condition when, it is believed that 5 pressure test of servo mechanism hydraulic motor close
Lattice, otherwise it is assumed that 5 pressure test of servo mechanism hydraulic motor is unqualified.
The burning point of kerosene is low, belongs to inflammable and explosive medium, and ground test danger is larger, meanwhile, the viscosity of kerosene medium is low,
Therefore, the Seal Design of kerosene pumping plant, the design of kerosene pump are all complex, and cost is higher.In view of factors above, on ground
When being simulated in face of this operating mode of servo mechanism, propose to use viscosity high compared with kerosene, and the hydraulic air that burning point is high
Oil is used as working media.
2. kerosene is replaced
When complete hydraulic motor dynamic test after, before servo mechanism is installed on rocket, then with pass through kerosene pumping plant to liquid
Motivation carries out kerosene displacement so that the hydraulic working oil medium in hydraulic motor is cleaned completely, avoids drainage rocket motor machine-made egg-shaped or honey-comb coal briquets
After oil work, kerosene return impacts it when starting.Kerosene displacement the specific steps are：
(2.1), as shown in figure 3, being sequentially connected displacement pumping plant 9, kerosene bucket 8, oily filter 4 to 5 oil inlet of servo mechanism hydraulic motor
Mouthful, 5 oil outlet of connection servo mechanism hydraulic motor to wasted oil bucket 10；
(2.2), control displacement pumping plant 9, is allowed to draw kerosene from kerosene bucket 8, kerosene is sent to servo by oily filter 11
Structure hydraulic motor 5, the pressure that can make 5 rotary motion of servo mechanism hydraulic motor is applied with to kerosene, is generally chosen for 4~5MPa i.e.
Can, driving servo mechanism hydraulic motor 5 rotates, and servo mechanism 7 is in free state, flow through the kerosene of servo mechanism hydraulic motor 5 from
The oil outlet of servo mechanism hydraulic motor 5 is expelled to wasted oil bucket 10；
(2.3), the purity of the kerosene of the oil outlet outflow of detection servo mechanism hydraulic motor 5, until the purity of kerosene is more than
95%.
To further ensure that high leakproofness of the hydraulic motor in rocket engine fuel oil closed-loop system, hydraulic motor is completed
After dynamic test and kerosene displacement, airtight test will be carried out to hydraulic motor, to make the covering of airtight test comprehensive, will divided
It is other that positive pressure test and negative pressure test are carried out to it, ensure that entire drainage circuit has good air-tightness, there should not be leakage etc.
Failure.
3. positive pressure gas density test
The purpose of positive pressure gas density test is：Examination hydraulic motor bears outer seal configuration the ability of positive pressure, specific steps
For：
(3.1), as shown in figure 4, being sequentially connected nitrogen cylinder 12, shut-off valve 13, first pressure gauge 14, pressure reducing valve 15, second
Pressure gauge 16,5 oil inlet of servo mechanism hydraulic motor, 5 oil outlet of servo mechanism hydraulic motor connect seal plug 18；
(3.2), the switch shut-off valve 13 that control nitrogen pressurizes to hydraulic motor is opened, pressure reducing valve 15 is adjusted, observes pressure gauge
16, airtight test loop is pressurized to 0.5MPa and is kept for a period of time；
(3.3), using the probe of helium mass spectrometer leak detector 19, at interface tool 17, at seal plug 18 and hydraulic motor
At the part joint surface of 5 components, helium leak rate is checked, the probe distance detection site of helium mass spectrometer leak detector 19
Distance is less than 3mm, and detection gait of march is slowly uniform, if leak rate is no more than the required value of setting, generally chooses 5 × 10-
12Pa.m3/s is hereinafter, the then airtight passed examination of positive pressure, otherwise, positive pressure is airtight check it is unqualified.
4. the airtight test of negative pressure
The purpose of the airtight test of negative pressure is：Examination hydraulic motor bears outer seal configuration the ability of negative pressure, specific steps
For：
(4.1), as shown in figure 5, connection filling platform 20 is to 5 oil inlet of servo mechanism hydraulic motor, servo mechanism hydraulic motor 5 goes out
Hydraulic fluid port installs seal plug 18；
(4.2), the airtight test loop in servo mechanism hydraulic motor 5 is vacuumized by filling platform 20, if vacuum degree energy
It is extracted into preset threshold value, according to design requirement, the general threshold value takes 2000Pa and its following values, then the airtight inspection of negative pressure is closed
Lattice, otherwise, the airtight inspection of negative pressure are unqualified.
Positive pressure and the airtight inspection of negative pressure are carried out, i.e., examines hydraulic motor to outside seal by filling barotropic gas inside hydraulic motor
The ability of positive pressure is born, the ability that examination hydraulic motor bears outside seal positive pressure is vacuumized inside hydraulic motor, is fully examined
Hydraulic motor vacuumizes for full rocket to the sealing performance of outside seal and provides guarantee in filling process.
From the foregoing, it will be observed that drainage engine kerosene servo mechanism ground experiment only needs in total：One hydraulic station, three it is soft
Pipe, a speed governing valve, two oily filters, a kerosene bucket, a displacement pumping plant, a wasted oil bucket, one bottle of nitrogen, a cut-off
Valve, two pressure gauges, a pressure reducing valve, an interface tool, a seal plug, a helium mass spectrometer leak detector, a filling
Platform.These equipment are conventional equipment, can be bought and can be reused by hydraulic component manufacturer.And test system
It is simple in structure, it is cheap.
Therefore, drainage engine kerosene servo mechanism test method proposed by the present invention, securely and reliably, experiment is abundant, saves
The reliably working that about cost is servo mechanism on rocket provides guarantee.
The undocumented part of the present invention is known in the art common sense.
Claims (10)
1. a kind of drainage engine kerosene servo mechanism ground experiment method, it is characterised in that include the following steps：
(1), kerosene is replaced using aircraft fluid, pressure test is carried out to servo mechanism hydraulic motor, i.e.,：Aircraft fluid is connect
Enter servo mechanism hydraulic motor, hydraulic air oil pressure is identical as the high pressure coal oil pressure provided in rocket system, adjusts aviation liquid
The flow velocity of pressure oil makes it stable, and tests preset a period of time, and whether the rotating speed r of statistics servo mechanism hydraulic motor meets：(benchmark
Rotating speed-predetermined deviation)≤r≤(reference rotation speed+predetermined deviation) condition, if it is satisfied, then servo mechanism is surged mechanomotive force survey
Examination is qualified, and otherwise, servo mechanism hydraulic motor dynamic test is unqualified；
(2), kerosene displacement is carried out to servo mechanism hydraulic motor, i.e.,：The aircraft fluid in servo mechanism hydraulic motor is cleaned, until
The purity of the kerosene of servo mechanism hydraulic motor outflow is more than 95%；
(3), positive pressure detects air-leakage test, i.e.,：It is filled with nitrogen into the airtight test loop in servo mechanism hydraulic motor, is pressurizeed
It to preset pressure value, and is kept for a period of time, later, tests helium leak rate, if no more than the required value of setting, positive pressure
Airtight passed examination, otherwise, the airtight inspection of positive pressure are unqualified；
(4), detection of negative pressure air-leakage test, i.e.,：Airtight test loop in servo mechanism hydraulic motor is vacuumized, checks servo
Whether the airtight test loop vacuum degree in mechanism hydraulic motor can reach preset threshold value, can reach, then detection of negative pressure is airtight
Property detection it is qualified, otherwise, detection of negative pressure air-leakage test is unqualified.
2. a kind of drainage engine kerosene servo mechanism ground experiment method according to claim 1, it is characterised in that institute
State step (1) the specific steps are：
(1.1), it is sequentially connected that ground hydraulic station (1), speed governing valve (3) is to servo mechanism hydraulic motor (5) oil inlet, then is sequentially connected
Servo mechanism hydraulic motor (5) oil outlet, oily filter (4) to ground hydraulic station (1), the ground hydraulic station internal reservoir hydraulic air
Oil；
(1.2), the high pressure coal oil pressure provided in the hydraulic air oil pressure and rocket system that ground hydraulic station (1) exports is provided
It is identical, hydraulic air oil flow rate is adjusted by speed governing valve (3), makes servo mechanism hydraulic motor (5) invariablenes turning speed in [reference rotation speed-
Predetermined deviation, reference rotation speed+predetermined deviation] within；
(1.3), continuance test preset a period of time, and record the rotating speed of servo mechanism hydraulic motor (5)；
(1.4), the stabilization of speed situation of analysis servo mechanism hydraulic motor (5), when all tachometer values all meet (reference rotation speed-
Predetermined deviation)≤r≤(reference rotation speed+predetermined deviation) condition when, it is believed that servo mechanism hydraulic motor (5) pressure test is qualified, no
Then, it is believed that servo mechanism hydraulic motor (5) pressure test is unqualified.
3. a kind of drainage engine kerosene servo mechanism ground experiment method according to claim 2, it is characterised in that institute
Within state rotating speed on the basis of step (1.2) described predetermined deviation 5%.
4. a kind of drainage engine kerosene servo mechanism ground experiment method according to claim 2, it is characterised in that institute
It is 5min or more to state preset a period of time described in step (1.3).
5. a kind of drainage engine kerosene servo mechanism ground experiment method according to claim 1, it is characterised in that institute
State step (2) the specific steps are：
(2.1), it is sequentially connected displacement pumping plant (9), kerosene bucket (8), oily filter (11) to servo mechanism hydraulic motor (5) oil inlet, even
Servo mechanism hydraulic motor (5) oil outlet is connect to wasted oil bucket (10)；
(2.2), control displacement pumping plant (9) is allowed to draw kerosene from kerosene bucket (8), and kerosene is sent to servo by oily filter (11)
Mechanism hydraulic motor (5) is applied with the pressure that can make servo mechanism hydraulic motor (5) rotary motion to kerosene, drives servo mechanism
Hydraulic motor (5) rotate, flow through servo mechanism hydraulic motor (5) kerosene be expelled to from the oil outlet of servo mechanism hydraulic motor (5) it is useless
Oil drum (10)；
(2.3), the purity of the kerosene of the oil outlet outflow of detection servo mechanism hydraulic motor (5), until the purity of kerosene is more than
95%.
6. a kind of drainage engine kerosene servo mechanism ground experiment method according to claim 1, it is characterised in that institute
State step (3) the specific steps are：
(3.1), nitrogen cylinder (12), shut-off valve (13), first pressure gauge (14), pressure reducing valve (15), second pressure gauge are sequentially connected
(16), servo mechanism hydraulic motor (5) oil inlet, servo mechanism hydraulic motor (5) oil outlet connect seal plug (18)；
(3.2), the switch shut-off valve (13) that control nitrogen pressurizes to hydraulic motor is opened, pressure reducing valve (15) is adjusted, observes pressure gauge
(16), airtight test loop is pressurized to 0.5MPa and is kept for a period of time；
(3.3), it using the probe of helium mass spectrometer leak detector (19), at interface tool (17), at seal plug (18) and surges
At the part joint surface of machine (5) component, helium leak rate is checked, the probe distance of helium mass spectrometer leak detector (19) is detected
The distance at position is less than 3mm, and detection gait of march is slowly uniform, if helium leak rate is no more than the required value of setting, just
Calm the anger close passed examination, otherwise, positive pressure is airtight check it is unqualified.
7. a kind of drainage engine kerosene servo mechanism ground experiment method according to claim 6, it is characterised in that institute
The a period of time stated in step (3.2) is set as 2min or more.
8. a kind of drainage engine kerosene servo mechanism ground experiment method according to claim 6, it is characterised in that institute
It is 5 × 10 to state required value in step (3.3)-12Pa.m3/ s or less.
9. a kind of drainage engine kerosene servo mechanism ground experiment method according to claim 1, it is characterised in that institute
State being implemented as step (4)：
(4.1), connection filling platform (20) to servo mechanism hydraulic motor (5) oil inlet, the installation of servo mechanism hydraulic motor (5) oil outlet
Seal plug (18)；
(4.2), the airtight test loop in servo mechanism hydraulic motor (5) is vacuumized by filling platform (20), if vacuum degree energy
It is extracted into preset threshold value, then the airtight passed examination of negative pressure, otherwise, the airtight inspection of negative pressure is unqualified.
10. a kind of drainage engine kerosene servo mechanism ground experiment method according to claim 9, it is characterised in that institute
It is 2000Pa or less to state the predetermined threshold value described in step (4.2).
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| CN110617923A (en) * | 2019-10-11 | 2019-12-27 | 华东光电集成器件研究所 | Helium mass spectrum leak detection pressurization laminating device |
| CN111734555B (en) * | 2020-05-18 | 2021-04-30 | 北京航空航天大学 | Intelligent adjusting conveying system and method for rocket engine |
| CN112539678B (en) * | 2020-11-30 | 2022-12-09 | 北京宇航系统工程研究所 | Automatic launching control method for low-temperature power system of carrier rocket |
| CN113738537B (en) * | 2021-08-06 | 2022-10-28 | 北京精密机电控制设备研究所 | Servo mechanism hydraulic motor energy matching method adapting to variable thrust working condition of engine |
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