CN109725175A - A kind of low temperature tachometric survey experimental rig - Google Patents
A kind of low temperature tachometric survey experimental rig Download PDFInfo
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- CN109725175A CN109725175A CN201910066102.6A CN201910066102A CN109725175A CN 109725175 A CN109725175 A CN 109725175A CN 201910066102 A CN201910066102 A CN 201910066102A CN 109725175 A CN109725175 A CN 109725175A
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- low temperature
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- experimental rig
- tachometric survey
- floating ring
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Abstract
A kind of low temperature tachometric survey experimental rig provided by the invention, comprising: shell is equipped with cryogenic media in the low temperature cavity including the low temperature cavity and room temperature chamber separated；Speed probe, on the shell and the part speed probe protrudes into the low temperature cavity；The motor shaft of motor, the motor is intracavitary set on the room temperature and protrudes into the low temperature cavity；Signal source can be rotatably arranged on the motor shaft with the motor shaft, and the signal source is located in the low temperature cavity.Engine speed measuring device is before complete machine test run, the speed probe of rotation-speed measuring device is installed on shell, turbine pump low temperature environment can be utmostly simulated, in more actually low temperature environment, the performance for testing rotation-speed measuring device, reduces the empirical risk of engine test.
Description
Technical field
The present invention relates to liquid-propellant rocket engine tachometric survey technical fields, and in particular to a kind of low temperature tachometric survey test
Device.
Background technique
Cryogenic liquid rocket engine rotation-speed measuring device lacks the verifying under necessary low temperature environment before complete machine test run
Means just carry out tachometric survey when test run under true low temperature environment, very unfavorable for change in design etc..Low temperature
Under environment, the size of bar magnet, the power in magnetic field, spacing of the bar magnet with rotation-speed measuring device, rotation-speed measuring device inside turbine pump
The number of turns of Inside coil, the specification of internal permeability magnetic material, the revolving speed of turbine pump can all have final tachometric survey result larger
Influence.Since structure is complicated for liquid engine, the general assembly period is long, and system experimentation expense is high, the reasons such as lead time, often
Rotation-speed measuring device is not verified under true environment, improved the chance of adjustment, therefore, a low temperature revolving speed is developed and surveys
Amount test tool is very important.The tooling needs the revolving speed of simulated engine as true as possible, the low temperature ring of engine
Border, bar magnet with rotation-speed measuring device relative position etc., by test, to verify the performance of rotation-speed measuring device.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that overcoming the performance of rotation-speed measuring device in the prior art cannot
The defect verified at low ambient temperatures, to provide a kind of performance progress that can at low ambient temperatures to rotation-speed measuring device
The low temperature tachometric survey experimental rig of verifying.
In order to solve the above technical problems, a kind of low temperature tachometric survey experimental rig provided by the invention, comprising:
Shell is equipped with cryogenic media in the low temperature cavity including the low temperature cavity and room temperature chamber separated；
Speed probe, on the shell and the part speed probe protrudes into the low temperature cavity；
The motor shaft of motor, the motor is intracavitary set on the room temperature and protrudes into the low temperature cavity；
Signal source can be rotatably arranged on the motor shaft with the motor shaft, and the signal source is located at the low temperature
It is intracavitary.
The shell is equipped with through-hole the motor shaft in the radial direction, and the speed probe is movably disposed in institute
It states in through-hole.
The signal source is speed probe.
The shell is equipped with first and enters channel, and gas enters channel through described first and enters in the shell so that institute
The pressure for stating room temperature chamber is greater than the pressure of the low temperature cavity.
The shell is equipped with second and enters channel, and the cryogenic media enters channel through described second and enters the low temperature
It is intracavitary.
Nut is connected through a screw thread on the outside of the motor shaft, the speed probe is arranged on the nut.
The shell be equipped with motor shaft mounting hole, the motor shaft include the first shaft part and the second shaft part, described first
Shaft part and second shaft part form step surface, and the first shaft part housing is equipped with sealing axle sleeve, and the nut is by the sealing
Axle sleeve is pressed on the step surface, and first shaft part passes through the motor shaft mounting hole with the sealing axle sleeve will be described low
Warm chamber is separated with the room temperature chamber.
Adjustment gasket is equipped between the nut and the sealing axle sleeve, so that the central axes of the speed probe and institute
State the central axes alignment of speed probe.
Floating ring is equipped between the sealing axle sleeve and the shell, one end that the floating ring is located at the room temperature chamber is set
There is floating ring-shaped pressuring plate, the floating ring-shaped pressuring plate is fixedly connected with the shell.
The floating ring includes the first floating ring and the second floating ring, first floating ring and second floating ring it
Between be equipped with gap, elastic component be set to the gap in by first floating ring, the second floating ring compress.
Described first is connected into channel with the gap.
The shell includes the first shell and second shell being detachably connected, the first shell and the second shell
The low temperature cavity is surrounded, the room temperature chamber is located in the second shell.
Side in the second shell positioned at the room temperature chamber is additionally provided with the first flow pass, and the second shell is upper
The second flow pass is equipped in the side of the low temperature cavity.
The motor casing of the motor is detachably connected with the shell, and the motor casing of the motor is surrounded with the shell
The room temperature chamber.
The cryogenic media is liquid nitrogen.
Technical solution of the present invention has the advantages that
1. a kind of low temperature tachometric survey experimental rig provided by the invention, engine speed measuring device is in complete machine test run
Before, the speed probe of rotation-speed measuring device is installed on shell, and extend into speed probe in the low temperature cavity of shell,
The low temperature environment of low temperature environment simulated engine real work in low temperature cavity, for motor shaft in rotation, signal source is with motor shaft
Rotation, the revolving speed of the revolving speed simulated engine of motor shaft, speed probe measure revolving speed by the strong and weak variation of signal source, lead to
Experiment is crossed to verify the performance of rotation-speed measuring device, turbine pump low temperature environment can be utmostly simulated, in more actually low temperature
In environment, the performance of rotation-speed measuring device is tested, reduces the empirical risk of engine test.
2. a kind of low temperature tachometric survey experimental rig provided by the invention, radial direction of the shell in the motor shaft
It is equipped with through-hole, the speed probe is movably disposed in the through-hole, can be by adjusting speed probe in through-holes
Position adjust the relative position of speed probe and signal source, it is adaptable.
3. a kind of low temperature tachometric survey experimental rig provided by the invention, the signal source is magnet, it is ensured that in low temperature
Magnetic field can be normally generated under environment.
4. a kind of low temperature tachometric survey experimental rig provided by the invention, the shell is equipped with first and enters channel, gas
Body enters channel through described first and enters in the shell so that the pressure of the room temperature chamber leads to greater than the pressure of the low temperature cavity
This setup is crossed, enter the cryogenic media in low temperature environment will not in room temperature chamber, it can by low temperature cavity and motor body
By isolation, prevent low temperature environment from influencing the normal work of motor.
5. a kind of low temperature tachometric survey experimental rig provided by the invention, the shell is equipped with second and enters channel, institute
It states cryogenic media and enters in the low temperature cavity through described second into channel, it is ensured that the low temperature environment in low temperature cavity.
6. a kind of low temperature tachometric survey experimental rig provided by the invention, the motor shaft outside has been connected through a screw thread spiral shell
Mother, the magnet are arranged on the nut, and structure is simple, easy for installation, and can adjust magnetic by adjusting the position of nut
The relative position of body and speed probe.
7. a kind of low temperature tachometric survey experimental rig provided by the invention, the shell is equipped with motor shaft mounting hole, institute
Stating motor shaft includes the first shaft part and the second shaft part, and first shaft part and second shaft part form step surface, and described first
Sealing axle sleeve is arranged with outside shaft part, the sealing axle sleeve is pressed on the step surface by the nut, first shaft part with
The sealing axle sleeve passes through the motor shaft mounting hole and separates the low temperature cavity and the room temperature chamber, and structure is simple, installation side
Just.
8. a kind of low temperature tachometric survey experimental rig provided by the invention, is equipped between the nut and the sealing axle sleeve
Gasket is adjusted, so that the central axes of the magnet are aligned with the central axes of the speed probe, easy for installation, the axis of magnet
In the case that line is aligned with the central axes of speed probe, the power variation in the magnetic field that sensor sensing arrives is obvious, can be more
Good carry out tachometric survey.
9. a kind of low temperature tachometric survey experimental rig provided by the invention, is equipped between the sealing axle sleeve and the shell
Floating ring, one end that the floating ring is located at the room temperature chamber are equipped with floating ring-shaped pressuring plate, the floating ring-shaped pressuring plate and the shell
It is fixedly connected, it is ensured that leakproofness when motor shaft rotates prevents cryogenic media from passing through the gap between sealing axle sleeve and shell
Into in room temperature chamber.
10. a kind of low temperature tachometric survey experimental rig provided by the invention, the floating ring includes the first floating ring and the
Two floating rings, are equipped with gap between first floating ring and second floating ring, elastic component is set in the gap to incite somebody to action
First floating ring, the second floating ring compress, and this setup can facilitate the shell or floating ring pressure of floating ring and two sides
Plate is adjacent to.
11. a kind of low temperature tachometric survey experimental rig provided by the invention, described first, which enters channel and the gap, connects
Logical, gas reaches sealing axle sleeve after first enters after channel enters the gap passed through between the first floating ring and the second floating ring
Surface, then the radial minim gap respectively between translateral sealing axle sleeve and motor shaft enters low temperature cavity and room temperature chamber,
The cryogenic media in low temperature cavity can be obstructed, and to enter room temperature intracavitary.
12. a kind of low temperature tachometric survey experimental rig provided by the invention, the shell include first be detachably connected
Shell and second shell, the first shell and the second shell surround the low temperature cavity, and the room temperature chamber is located at described the
In two shells, facilitate installation.
13. a kind of low temperature tachometric survey experimental rig provided by the invention, the room temperature chamber is located in the second shell
Side be additionally provided with the first flow pass, the side that the low temperature cavity is located in the second shell is equipped with the second flow pass,
The intracavitary gas of room temperature can be flowed out through the first flow pass, guarantee the intracavitary air pressure balance of room temperature, into low temperature cavity gas with
It is flowed out after cryogenic media mixing in low temperature cavity through the second flow pass, it is ensured that the low temperature environment in low temperature cavity.
14. a kind of low temperature tachometric survey experimental rig provided by the invention, the motor casing of the motor and the shell can
Dismantling connection, and the motor casing of the motor and the shell surround the room temperature chamber, it is convenient for disassembly and assembly.
15. a kind of low temperature tachometric survey experimental rig provided by the invention, the cryogenic media is liquid nitrogen, and liquid nitrogen can guarantee
Low temperature environment in low temperature cavity, and safe and reliable, no application risk, it is at low cost.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of cross-sectional view of the low temperature tachometric survey experimental rig provided in the embodiment of the present invention 1；
Description of symbols:
1- first shell；2- second shell；3- low temperature cavity；4- room temperature chamber；5- speed probe；6- magnet；7-
Nut；8- first enters channel；9- second enters channel；The first flow pass of 10-；The second flow pass of 11-；12-
One shaft part；The second shaft part of 13-；14- sealing axle sleeve；15- adjusts gasket；The first floating ring of 16-；The second floating ring of 17-；
18- pre-tightens wave spring；19- motor casing.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments
It can be combined with each other at conflict.
Embodiment 1
It is as shown in Figure 1 a kind of specific embodiment of low temperature tachometric survey experimental rig, including shell, in the shell
Equipped with the low temperature cavity 3 and room temperature chamber 4 separated, cryogenic media is equipped in the low temperature cavity 3, speed probe 5 is set to the shell
On the body and part speed probe 5 protrudes into the low temperature cavity 3, and the motor for simulating turbine pump engine speed is installed
In the side of the room temperature chamber 4 of the shell, the motor shaft of the motor is set in the room temperature chamber 4 and protrudes into the low temperature cavity 3
Interior, signal source can be rotatably arranged on the motor shaft with the motor shaft, and the signal source is located in the low temperature cavity 3.
In the present embodiment, the shell includes the first shell 1 and second shell 2 being detachably connected, and described first
Shell 1 and the second shell 2 surround the low temperature cavity 3, and the room temperature chamber 4 is located in the second shell 2.The second shell
Body 2 is equipped with through-hole the motor shaft in the radial direction, and the speed probe 5 is movably disposed in the through-hole, this
The relative position that speed probe 5 Yu signal source can be adjusted by adjusting the position of speed probe 5 in through-holes is arranged in sample,
Adaptability is stronger.
To guarantee that signal source can generate signal normally in order to which speed probe 5 can sense at low ambient temperatures
The variation of signal strength or weakness measures revolving speed, and the signal source in present embodiment is magnet 6, and magnet 6 is fixedly mounted on outside motor shaft.
For the relative position for being conveniently adjusted magnet 6 Yu speed probe 5, the motor shaft outside has been connected through a screw thread nut 7, described
Nut 7 is equipped with 6 mounting hole of magnet, and the magnet 6 is mounted in 6 mounting hole of magnet, and setting both can be by adjusting spiral shell in this way
The position of mother 7 adjusts the relative position of magnet 6 Yu speed probe 5, and facilitates the fixed installation of magnet 6.
The motor casing 19 of the motor is detachably connected with the second shell 2, and the motor casing 19 of the motor and institute
It states shell and surrounds the room temperature chamber 4, the second shell 2 is equipped with motor shaft and fills hole, and the motor shaft includes the first shaft part 12
With the second shaft part 13, first shaft part 12 forms step surface with second shaft part 13, is arranged with outside first shaft part 12
The sealing axle sleeve 14 is pressed on the step surface by sealing axle sleeve 14, the nut 7, and second shaft part 13 is located at room temperature
In chamber 4, first shaft part 12 and the sealing axle sleeve 14 pass through the motor shaft mounting hole by the low temperature cavity 3 with it is described often
Warm chamber 4 separates.As shown in Figure 1, adjustment gasket 15 is equipped between the nut 7 and the sealing axle sleeve 14, so that the magnet 6
Central axes be aligned with the central axes of the speed probe 5, it is easy for installation, in the central axes of magnet 6 and speed probe 5
In the case that axis is aligned, the power variation in the magnetic field that sensor sensing arrives is obvious, can preferably carry out tachometric survey.
In motor shaft rotation, to guarantee the leakproofness between sealing axle sleeve 14 and shell, prevent cryogenic media from passing through close
Gap between envelope axle sleeve 14 and shell enters in room temperature chamber 4, and floating ring is equipped between the sealing axle sleeve 14 and the shell,
One end that the floating ring is located at the room temperature chamber 4 is equipped with floating ring-shaped pressuring plate, and the floating ring-shaped pressuring plate and the shell pass through spiral shell
Bolt is fixedly connected.Since floating ring needs to be adjacent to the shell of two sides or floating ring-shaped pressuring plate during installation, in the present embodiment,
The floating ring includes the first floating ring 16 and the second floating ring 17, first floating ring 16 and second floating ring 17 it
Between be equipped with gap, elastic component be set to the gap in first floating ring 16, the second floating ring 17 to be compressed.This embodiment party
Elastic component in formula is to pre-tighten wave spring 18.
The second shell 2 is equipped with first and enters channel 8, and nitrogen enters channel 8 through described first and enters the shell
It is interior that so that the pressure of the room temperature chamber 4 is greater than the pressure of the low temperature cavity 3, the shell is equipped with second and enters channel 9, as
The liquid nitrogen of cryogenic media enters channel 9 through described second and enters in the low temperature cavity 3, is located in the second shell 2 described normal
The side of warm chamber 4 is additionally provided with the first flow pass 10, and the side that the low temperature cavity 3 is located in the second shell 2 is equipped with second
Flow pass 11.Nitrogen enters after channel 8 enters through first through the gap between the first floating ring 16 and the second floating ring 17
Reach the surface of sealing axle sleeve 14 afterwards, then respectively the radial minim gap between translateral sealing axle sleeve 14 and motor shaft into
Enter low temperature cavity 3 and room temperature chamber 4, enter the cryogenic media in low temperature environment will not in room temperature chamber 4, by low temperature cavity 3 and motor
Ontology is reliably isolated, and prevents low temperature environment from influencing the normal work of motor.Gas in room temperature chamber 4 can be through the first flow pass 10
Outflow guarantees the air pressure balance in room temperature chamber 4, into low temperature cavity 3 gas mixed with the cryogenic media in low temperature cavity 3 after through the
Two flow pass 11 outflow, it is ensured that the low temperature environment in low temperature cavity 3.
In the present embodiment, the junction of first shell 1 and second shell 2 uses aluminum sealing ring, and motor shaft is the same as close
The junction for sealing axle sleeve 14 uses teflin ring, it can be ensured that the sealed reliable of test.
When test, electrical power, motor shaft synchronous drive sealing axle sleeve 14 and the rotation of nut 7 3000rpm-4000rpm are
Can, speed probe 5 picks up the rotation speed change situation of tested nut 7.Make to be passed through in low temperature cavity 3 by the second entrance channel 9 low
Hydraulic fluid nitrogen forms the low temperature simulated environment of examination revolving speed coil.Enter in channel 8 first and be passed through a certain amount of nitrogen at room,
Its pressure is higher than the pressure in low temperature cavity 3, and low temperature cavity 3 is isolated with room temperature chamber 4.First floating of a part of nitrogen through left side
The radial minim gap that ring 16 and sealing axle sleeve 14 are formed is flowed out into left side low temperature cavity 3, and after mixing with liquid nitrogen through second
Channel 11 is discharged.Another part of nitrogen, the radial minim gap that the second floating ring 17 through right side is formed with sealing axle sleeve 14,
It is discharged after into right side room temperature chamber 4 through the first flow pass 10.The quantity of adjustment gasket 15 can be adjusted according to the demand of test,
Make the center of speed probe 5 that there is certain offset with the center of magnet 6, tests the property of tachometric survey in this state
Energy.The screw-in depth of adjustable speed probe 5, so that speed probe 5 sends variation with the distance of magnet 6, test exists
The performance of tachometric survey under the state.The size of magnet 6 in adjustable nut 7 tests the property of tachometric survey in this state
Energy.The low temperature tachometric survey experimental rig structure is simple, turbine pump low temperature environment can be utmostly simulated, more actually low
In warm environment, the performance of rotation-speed measuring device is tested, reduces the empirical risk of engine test.
In interchangeable embodiment, nitrogen can be replaced the various gases such as helium, argon gas, oxygen.
In interchangeable embodiment, liquid nitrogen can be replaced the cryogenic medias such as liquid oxygen, liquid hydrogen, but use liquid nitrogen more
Securely and reliably, at low cost.
In interchangeable embodiment, the magnet 6 can be replaced laser source as signal source.
In interchangeable embodiment, the shape of first shell 1 and second shell 2 is not limited to the shape using Fig. 1, the
Two may be provided in second shell 2 into channel 9, and the second flow pass 11 may be provided in first shell 1, install revolution speed sensing
The through-hole of device 5 can also be located in first shell 1.
In interchangeable embodiment, first be can be set into channel 8 in the top of room temperature chamber 4, but in this way may be used
The time that nitrogen can be made to enter low temperature cavity 3 is longer.
In interchangeable embodiment, pre-tightening wave spring 18 can be used common elastic component.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (15)
1. a kind of low temperature tachometric survey experimental rig characterized by comprising
Shell is equipped with cryogenic media in the low temperature cavity (3) including the low temperature cavity (3) separated and room temperature chamber (4)；
Speed probe (5), is set on the shell and the part speed probe (5) protrudes into the low temperature cavity (3)；
The motor shaft of motor, the motor is set in the room temperature chamber (4) and protrudes into the low temperature cavity (3)；
Signal source can be rotatably arranged on the motor shaft with the motor shaft, and the signal source is located at the low temperature cavity (3)
It is interior.
2. a kind of low temperature tachometric survey experimental rig according to claim 1, which is characterized in that the shell is in the electricity
Arbor is equipped with through-hole in the radial direction, and the speed probe (5) is movably disposed in the through-hole.
3. a kind of low temperature tachometric survey experimental rig according to claim 1, which is characterized in that the signal source is revolving speed
Sensor (6).
4. a kind of low temperature tachometric survey experimental rig according to claim 3, which is characterized in that the shell is equipped with the
One enters channel (8), and gas enters channel (8) through described first and enters in the shell so that the pressure of the room temperature chamber (4)
Greater than the pressure of the low temperature cavity (3).
5. a kind of low temperature tachometric survey experimental rig according to claim 4, which is characterized in that the shell is equipped with the
Two enter channel (9), and the cryogenic media enters channel (9) through described second and enters in the low temperature cavity (3).
6. a kind of low temperature tachometric survey experimental rig according to claim 5, which is characterized in that logical on the outside of the motor shaft
It crosses and is threaded with nut (7), the speed probe (6) is arranged on the nut (7).
7. a kind of low temperature tachometric survey experimental rig according to claim 6, which is characterized in that the shell is equipped with electricity
Arbor mounting hole, the motor shaft include the first shaft part (12) and the second shaft part (13), first shaft part (12) and described the
Two shaft parts (13) form step surface, are arranged with sealing axle sleeve (14) outside first shaft part (12), the nut (7) will be described close
Envelope axle sleeve (14) is pressed on the step surface, and first shaft part (12) and the sealing axle sleeve (14) pass through the motor shaft
Mounting hole separates the low temperature cavity (3) and the room temperature chamber (4).
8. a kind of low temperature tachometric survey experimental rig according to claim 7, which is characterized in that the nut (7) and institute
It states and is equipped with adjustment gasket (15) between sealing axle sleeve (14), so that the central axes of the speed probe (6) and the revolving speed pass
The central axes of sensor (5) are aligned.
9. a kind of low temperature tachometric survey experimental rig according to claim 7, which is characterized in that the sealing axle sleeve (14)
Floating ring is equipped between the shell, one end that the floating ring is located at the room temperature chamber (4) is equipped with floating ring-shaped pressuring plate, described
Floating ring-shaped pressuring plate is fixedly connected with the shell.
10. a kind of low temperature tachometric survey experimental rig according to claim 9, which is characterized in that the floating ring includes
First floating ring (16) and the second floating ring (17), are equipped between first floating ring (16) and second floating ring (17)
Gap, elastic component are set in the gap to compress first floating ring (16), the second floating ring (17).
11. a kind of low temperature tachometric survey experimental rig according to claim 10, which is characterized in that first entrance is logical
Road (8) is connected to the gap.
12. a kind of low temperature tachometric survey experimental rig described in any one of -11 according to claim 1, which is characterized in that institute
Stating shell includes the first shell (1) and second shell (2) being detachably connected, the first shell (1) and the second shell
(2) it surrounds the low temperature cavity (3), the room temperature chamber (4) is located in the second shell (2).
13. a kind of low temperature tachometric survey experimental rig according to claim 12, which is characterized in that the second shell
(2) side on positioned at the room temperature chamber (4) is additionally provided with the first flow pass (10), is located on the second shell (2) described
The side of low temperature cavity (3) is equipped with the second flow pass (11).
14. a kind of low temperature tachometric survey experimental rig described in any one of -11 according to claim 1, which is characterized in that institute
The motor casing (19) for stating motor is detachably connected with the shell, and the motor casing (19) of the motor and the shell surround institute
State room temperature chamber (4).
15. a kind of low temperature tachometric survey experimental rig described in any one of -11 according to claim 1, which is characterized in that institute
Stating cryogenic media is liquid nitrogen.
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| CN201910066102.6A CN109725175B (en) | 2019-01-23 | 2019-01-23 | Low-temperature rotating speed measurement test device |
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| CN201910066102.6A CN109725175B (en) | 2019-01-23 | 2019-01-23 | Low-temperature rotating speed measurement test device |
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| CN109725175B CN109725175B (en) | 2021-02-05 |
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| 朴胜志 等: "低温火箭发动机用转速传感器设计与优化", 《中国航天第三专业信息网第三十八届技术交流会暨第二届空天动力联合会议论文集—液体推进技术》 * |
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|---|---|
| CN109725175B (en) | 2021-02-05 |
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