CN205982311U - Top wheel speed testing arrangement and blowing air system thereof - Google Patents
Top wheel speed testing arrangement and blowing air system thereof Download PDFInfo
- Publication number
- CN205982311U CN205982311U CN201620893303.5U CN201620893303U CN205982311U CN 205982311 U CN205982311 U CN 205982311U CN 201620893303 U CN201620893303 U CN 201620893303U CN 205982311 U CN205982311 U CN 205982311U
- Authority
- CN
- China
- Prior art keywords
- gas circuit
- anger
- laval nozzle
- branch road
- air blowing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model relates to a top wheel speed testing arrangement and blowing air system thereof, blowing air system blow with the drive top wheel pivoted gas circuit of blowing to the top wheel that awaits measuring including being used for, and the end of giving vent to anger of the gas circuit of blowing is equipped with a laval nozzle structure. The utility model discloses in the terminal a laval nozzle of the adoption structure of giving vent to anger of gas circuit of blowing, because a laval nozzle structure utilizes the collapsible tube structure and the convergent divergent channel structure that self have effectively to improve big higher rotational speed with the high pressure draught, thus, can obtain high -velocity air, thereby can reduce the requirement to the air feed air supply, the cost is lowered, furthermore, a laval nozzle structure can improve the air speed by a wide margin, then, enlarge this blowing air system's of use rotational speed testing arrangement's rotational speed test specification, improve its general test performance.
Description
Technical field
This utility model is related to a kind of top cycle speed test device and its scavenger system.
Background technology
Certain product aerofoil gyro is air gyro, and when being blown by high pressure gas, the very fast rotation of gyro, if dynamic balancing is bad
When, gyro will produce certain centrifugal force, the collision between driving mechanical structure and friction, and then can affect the performance of product
Index.
When carrying out dynamic balance running to gyro wheel, aerofoil gyro requires the rotational speed regulation dynamic balancing in a certain fixation, this
Require the accurately and reliable of measurement of rotating speed.As《Metering and measuring technology》The aerofoil top of volume 34 the 9th interim record in 2007
The test of spiral shell rotating speed, the most of white paint in the surface of aerofoil gyro, only sub-fraction are brushed with pitch-dark, and this gyro is in the mistake of rotation
Cheng Zhong, irradiates gyro using photocell, when light is irradiated to the place of white paint, light reflexes on photoelectric receiving tube, works as light
It is irradiated to pitch-dark part, light is absorbed, do not have light to reflex on photoelectric receiving tube, so, using photoelectric receiving tube
Effect, the rotating speed of aerofoil gyro can be converted into square wave, so realize to gyroscope speed test.
In fact, mainly adopting inflatable gas road direction gyro wheel to blow to drive top when carrying out top cycle speed test at present
Spiral shell wheel high-speed rotation, during test, blows out high pressure draught from the end nozzle of air blowing gas circuit to gyro wheel, air-flow blows top cycle
Dynamic.But the nozzle that existing air blowing gas circuit is adopted mostly is isometrical nozzle, air-flow acceleration is bad, and this is just to outside supply gas
Source proposes high requirement, otherwise cannot meet the high rotation speed requirements of gyro wheel, and for extra high rotation speed requirements, sometimes
The source of the gas of elevated pressures cannot directly be changed, the scope of whole measurement of rotating speed is narrower.
Utility model content
The purpose of this utility model is to provide a kind of top cycle speed test device scavenger system, to solve existing skill
In art blow test in using etc. gauge structure nozzle make air blowing gas circuit to supply source of the gas require higher technical problem；With
When, this utility model also provides a kind of speed test device of the top cycle using above-mentioned scavenger system.
For achieving the above object, the technical side of top cycle speed test device scavenger system provided by the utility model
Case is：A kind of top cycle speed test device scavenger system, including for being blown to gyro wheel to be measured to drive top
The air blowing gas circuit that spiral shell wheel rotates, the end of giving vent to anger of air blowing gas circuit is provided with Laval nozzle structure.
Described air blowing gas circuit has at least two and gives vent to anger end branch, and end branch of respectively giving vent to anger is respectively provided with described giving vent to anger
End and described Laval nozzle structure, end branch of respectively giving vent to anger is respectively equipped with electromagnetic valve.
Described air blowing gas circuit includes the main gas circuit for connecting source of the gas, and air blowing gas circuit includes being arranged on main gas circuit is drawn with described
Between Wa Er nozzle structure and the tie point that is arranged in parallel and the second branch road, tie point is provided with passes through first for controlling
The flow control valve of the total gas flow rate of end output of giving vent to anger of air blowing gas circuit described in Zhi Luxiang, the second branch road is provided with air relief valve
With for make when tie point disconnects second branch road conducting, make when tie point turn on second branch road disconnection break-make control
Valve, this on-off control valve is to be arranged in the check valve in described air relief valve downstream, in described air relief valve and list on described second branch road
It is provided with overflow valve between valve.
The technical scheme of top cycle provided by the utility model speed test device is：A kind of top cycle speed test dress
Put, surveyed with the rotating speed driving the top cycle scavenger system moved and be used for measuring top cycle speed including for blowing to gyro wheel
Amount system, scavenger system includes air blowing gas circuit, and the end of giving vent to anger of air blowing gas circuit is provided with Laval nozzle structure.
Described air blowing gas circuit has at least two and gives vent to anger end branch, and end branch of respectively giving vent to anger is respectively provided with described giving vent to anger
End and described Laval nozzle structure, end branch of respectively giving vent to anger is respectively equipped with electromagnetic valve.
Described air blowing gas circuit includes the main gas circuit for connecting source of the gas, and air blowing gas circuit includes being arranged on main gas circuit is drawn with described
Between Wa Er nozzle structure and the tie point that is arranged in parallel and the second branch road, tie point is provided with blows to described for controlling
The flow control valve of the total gas flow rate of end output of giving vent to anger of gas gas circuit, the second branch road is provided with pressure reduction structure and for the
One branch road makes the second branch road conducting, makes the on-off control valve of the second branch road disconnection when tie point turns on when disconnecting.
Described on-off control valve is to be arranged in the check valve in described pressure reduction structure downstream, described, and pressure reduction structure is air relief valve,
It is additionally provided with overflow valve between described air relief valve and check valve on second branch road.
Test device includes testing stand, described Laval nozzle structure in the horizontal with corresponding gyro wheel apart from adjustable peace
It is contained on described testing stand, described Laval nozzle structure drops adjustable being arranged on described testing stand vertically raised.
Described testing stand is provided with jet pipe installing rack, and jet pipe installing rack includes column and the horizontal peace with column hinge mounted
Dress bar, described Laval nozzle structure be arranged on described in be transversely mounted on bar and be transversely mounted the hinged of bar and column by described
It is adjustable that the lifting on vertical in Laval nozzle structure is realized in cooperation.
Described speed measuring system includes the photoelectric sensor rotating for monitor gyro wheel, and photoelectric sensor is on vertical
It is arranged on sensor installing plate apart from adjustable with corresponding gyro wheel, sensor installing plate supports and is arranged on described testing stand.
The beneficial effects of the utility model are：Top cycle provided by the utility model speed test device when using,
There is provided high pressure draught from scavenger system to gyro wheel to be measured, to blow gyro wheel high-speed rotation, and surveyed by speed measuring system
The rotating speed of amount gyro wheel, the end of giving vent to anger due to air blowing gas circuit in this utility model adopts Laval nozzle structure, due to Bearing score
What your nozzle structure was had using itself shrink tubular construction and high pressure draught effectively can be improved higher greatly turning by expansion tubular construction
Speed, as such, it is possible to obtain high velocity air, such that it is able to reduce to supply source of the gas requirement, reduces cost, and, Lavalle spray
Tubular construction can be greatly improved air velocity, then expands the measurement of rotating speed scope of the device for testing rotating speed using this scavenger system,
Improve its universal test performance.
Further, air blowing gas circuit has at least two and gives vent to anger end branch, so at least two groups of gyro wheels can be entered
Row multitask measures examination, improves testing efficiency.
Further, end branch of respectively giving vent to anger is respectively equipped with electromagnetic valve, so can need to select to open according to test
Corresponding electromagnetic valve, to control corresponding end branch conducting of giving vent to anger, so can be realized corresponding gyro wheel is tested, with
When it is also possible to play adjust other gas flows in end branch of giving vent to anger effect.
Further, air blowing gas circuit includes the tie point being arranged in parallel and the second branch road, and tie point is provided with flow
Control valve, passes through the total gas flow rate to Laval nozzle structure output for the tie point to control, reaches the test of different rotating speeds
Require, expand the measurement of rotating speed scope of test device.Second branch road is provided with pressure reduction structure so that the second branch road forms decompression
Road, can reduce pressure to outside supply source of the gas, the same measurement of rotating speed scope expanding test device.And, in the second branch road
Upper setting on-off control valve, to avoid two branch roads to occur influencing each other.Further, on-off control valve adopts check valve, structure
Relatively simple, using more convenient, it is higher than the feature of the gas pressure in the second branch road using gas pressure in tie point, ingeniously
Wonderful realization controls to the break-make of the second branch road.
Further, the second branch road is additionally provided with overflow valve between air relief valve and check valve, can effective control second
Safe air pressure on road, improves security performance.
Further, Laval nozzle structure in the horizontal with corresponding gyro wheel apart from adjustable, Laval nozzle structure exists
Vertically raised fall is adjustable, photoelectric sensor on vertical with corresponding gyro wheel apart from adjustable, so can be according to actual test need
Adjust the distance of Laval nozzle structure and corresponding gyro wheel, the height position of the jet of adjustment Laval nozzle structure
Put, adjustment photoelectric sensor and corresponding gyro wheel, apart from gap, improve the certainty of measurement of test device, meet different tests
Demand.
Brief description
Fig. 1 is a kind of structural representation of embodiment of top cycle speed test device provided by the utility model；
Fig. 2 is the schematic diagram of gas circuit of the scavenger system of test device shown in Fig. 1.
Specific embodiment
Below in conjunction with the accompanying drawings embodiment of the present utility model is described further.
The specific embodiment of top cycle speed test device of the present utility model, as shown in Figure 1 and Figure 2, in this embodiment
Test device is included for blowing to gyro wheel to drive the dynamic scavenger system of top cycle and to be used for measuring top cycle speed
Speed measuring system, scavenger system includes air blowing gas circuit, and air blowing gas circuit herein includes the master for connecting outside supply source of the gas
Gas circuit 100, air blowing gas circuit also has four end branch 4 of giving vent to anger, and the end of giving vent to anger of end branch of respectively giving vent to anger 4 is respectively equipped with Bearing score
That nozzle structure 5, this Laval nozzle structure 5 is identical with the structure of Laval nozzle of the prior art, and itself has phase
The contraction pipeline section answered and expansion pipeline section, here no longer excessively repeats.
In fact, being respectively equipped with electromagnetic valve 18 to control the break-make of each branch road in end branch 4 of respectively giving vent to anger, meanwhile, each
Branch pressure table 19 is further respectively had on end branch of giving vent to anger 4 to detect the gas pressure of respective branch.
And, in the present embodiment, air blowing gas circuit includes being arranged on main gas circuit and gives vent to anger in four ends between branch road and simultaneously
The tie point 200 of connection arrangement and the second branch road 300.Tie point 200 is provided with for controlling the end of giving vent to anger to air blowing gas circuit
The flow control valve 17 of the total gas flow rate of end output.Second branch road 300 is the decompression branch road which is provided with pressure reduction structure, herein
Pressure reduction structure be specially air relief valve 13.And, it is additionally provided with for making second when tie point disconnects on the second branch road 300
Branch road turns on, makes when tie point turns on the on-off control valve of the second branch road disconnection, and this on-off control valve is to be arranged in decompression
The check valve 16 in valve downstream.And, decompression branch road is additionally provided with overflow valve 14 between air relief valve 13 and check valve 16 and subtracts
Pressure pressure table 15, decompressed pressure table 15 herein is used for the gas pressure on detection decompression branch road.
In addition, the direction along gas flowing has been sequentially arranged filter 10, break-make ball valve 11 and master in main gas circuit 100
Airline pressure table 12.
After the connection external air source that the present embodiment is provided, pressure-air by filter 10 filtration after, by break-make ball
The break-make of valve 11 control input gas, main airline pressure table 12 shows supply gas pressure in real time, and rear end gas circuit is divided into two-way, that is, first
Branch road 200 and the second branch road 300, road second branch road 300 reduces pressure branch road by pressure-air decompression output, can achieve
The needs of below 50000r/min measurement of rotating speed；An other road is directly passed through flow control valve 17 and is controlled output total flow, meanwhile,
After electromagnetic valve 18 cooperation given vent to anger in end branch 4 with four, achievable single channel 0～100000r/min and four roads simultaneously 0～
The needs of 30000r/min measurement of rotating speed.End branch of giving vent to anger 4 adopts solenoid valve control supply output, is giving vent to anger in end branch
Setting pressure gauge, shows the pressure of end of giving vent to anger in real time.And, on decompression branch road, setting overflow valve, as relief valve, surpasses
Pressure releasing pressure automatically is it is ensured that equipment and personal security.
Speed measuring system in the test device that the present embodiment is provided includes photoelectric sensor, corresponding in gyro wheel
The light and dark region of side setting, in gyro wheel high-speed rotation, photoelectric sensor is adopted by sensing the change in light and shade region
Collection rotary speed information, then by the information transfer collecting to PLC control system, was linked up filtering and amplified by control system, will
Presentation of information is in software interface.And, using PLC control system real-time monitoring operational factor and test assignment setting, can be simultaneously
Realize timing supply, the constant speed test etc. simultaneously of 4 sets of products, integrated level is high.
Test device in the present embodiment includes testboard 1, and testboard is arranged on rack 30, and testboard 1 is provided with phase
The frock clamp 2 answered, has the corresponding product 7 of gyro wheel 6 using this frock clamp 2 clamping fixing assembling, and this frock clamp is concrete
Including the pressing handwheel of two clamping plate being oppositely arranged clamping corresponding with realizing two clamping plate corresponding product 7, testing stand corresponds to each
Air blowing gas circuit is respectively equipped with a support 32, and each support 32 is respectively equipped with jet pipe installing rack and sensor installing plate, Lavalle
Nozzle structure 5 correspondence is arranged on jet pipe installing rack, and photoelectric sensor 3 is then corresponding is arranged on sensor installing plate.
Above-mentioned jet pipe installing rack include the column 31 being installed on support and with column hinge mounted be transversely mounted bar
33, Laval nozzle structure 5 is arranged on the one end being transversely mounted bar 33, and the other end hinge mounted being transversely mounted bar 33 has vertically
Mobile bar, vertically movable bar is adjustable vertical to be assemblied on support 32, when vertically movable bar moves on vertical
During adjustment, using lever principle, Laval nozzle structure 5 can be controlled to carry out lift adjustment on vertical by being transversely mounted bar,
And then can adjust the height and position of the jet of Laval nozzle structure.In fact, vertically movable bar is provided with positioning spiral shell
The fastening of vertically movable bar, when vertically movable bar moves into place, is assemblied in by female and lower location nut using upper and lower location nut
On support.
And, it is provided with installation groove at the respective end for installing Laval nozzle structure of QS, install
Groove along close-away from corresponding gyro wheel direction extend, Laval nozzle structure install groove in along close-away from
The mobile distance adjusting and then Laval nozzle structure and corresponding gyro wheel being adjusted in the horizontal in direction of corresponding gyro wheel.?
Groove is installed and is provided with trip bolt, so can be locked when Laval nozzle structure moves into place.
In fact, end branch of giving vent to anger herein is all using metal hose and corresponding Laval nozzle fabric connectivity, with
It is easy to lift adjustment on horizontal distance adjusts and be vertical for the Laval nozzle structure.
It should be noted that above-mentioned photoelectric sensor 3 vertically raised fall adjustable be arranged on sensor installing plate, this
Sample can be adjusted to the height and position of photoelectric sensor 3, such that it is able to adjust upward photoelectric sensor and corresponding top perpendicular
The distance of spiral shell wheel 6.
When specifically used, product 7 clamping to be measured is fixed on testboard 1, adjustment Laval nozzle structure position and
Highly, adjust photoelectric sensor 3 distance, by Laval nozzle structure 5, the gyro wheel 6 on product to be measured is blown, drive
Gyro wheel 6 rotates, and gyro wheel 6 arranges light and dark zones of different, carries out rotary speed data collection using photoelectric sensor 3,
Then tach signal is converted to current signal transfer to control system, control system current signal is filtered and amplification at
Reason, is eventually displayed in software system interface, also can pass through airborne printer, real-time rotary speed information graphically be printed defeated
Go out.Operator can carry out task setting, the test data required for monitoring in advance to control system.
In the present embodiment, air blowing gas circuit includes 4 end branch of giving vent to anger, and in other embodiments, air blowing gas circuit can be arranged
More than one or two, when be provided with multiple give vent to anger end branch when, electricity can be respectively provided with each gives vent to anger end branch
Magnet valve, so can realize the testing and control to single branch road it is also possible to be not provided with electromagnetic valve in end branch of respectively giving vent to anger.
In the present embodiment, air blowing gas circuit includes the tie point being arranged in parallel and the second branch road, so can improve test
The suitability of device.In other embodiments it is also possible to save the second branch road as decompression branch road, and only retain first
Road, at this point it is possible to setting flow control valve is it is also possible to be not provided with flow control valve on the first leg.
In the present embodiment, adopt air relief valve as the pressure reduction structure on the second branch road of decompression branch road, in other embodiment
In, choke valve may also be employed as pressure reduction structure.
In the present embodiment, for controlling the on-off control valve of the second branch road break-make according to tie point conducting and disconnection
From check valve, realize automatically controlling, cleverly make use of the different feature of the pressure of two branch roads.In other embodiments, lead to
Disconnected control valve may also be employed stop valve structure.
This utility model also provides a kind of embodiment of top cycle speed test device scavenger system, in this embodiment
The structure of scavenger system is identical with the structure of the scavenger system in above-mentioned top cycle speed test device embodiment, and here is no longer superfluous
State.
Claims (10)
1. a kind of top cycle speed test device scavenger system, including for being blown to gyro wheel to be measured to drive top
Spiral shell wheel rotate air blowing gas circuit it is characterised in that：The end of giving vent to anger of air blowing gas circuit is provided with Laval nozzle structure.
2. top cycle according to claim 1 speed test device scavenger system it is characterised in that：Described air blowing gas circuit
Have at least two to give vent to anger end branch, end branch of respectively giving vent to anger is respectively provided with described give vent to anger end and the spray of described Lavalle
Tubular construction, end branch of respectively giving vent to anger is respectively equipped with electromagnetic valve.
3. top cycle according to claim 1 and 2 speed test device scavenger system it is characterised in that：Described air blowing
Gas circuit includes the main gas circuit for connecting source of the gas, and air blowing gas circuit includes being arranged between main gas circuit and described Laval nozzle structure
And the tie point that is arranged in parallel and the second branch road, tie point is provided with for controlling by tie point to described inflatable gas
The flow control valve of the total gas flow rate of end output of giving vent to anger on road, the second branch road is provided with air relief valve and in tie point
Make during disconnection second branch road conducting, make when tie point turn on second branch road disconnection on-off control valve, this on-off control valve
For being arranged in the check valve in described air relief valve downstream, described second branch road is provided with overflow between described air relief valve and check valve
Valve.
4. a kind of top cycle speed test device, including for gyro wheel is blown with drive the scavenger system that top cycle moves and
For measure top cycle speed speed measuring system, scavenger system include air blowing gas circuit it is characterised in that：The going out of air blowing gas circuit
Gas end is provided with Laval nozzle structure.
5. top cycle according to claim 4 speed test device it is characterised in that：Described air blowing gas circuit has at least two
Individual end branch of giving vent to anger, end branch of respectively giving vent to anger is respectively provided with described give vent to anger end and described Laval nozzle structure, respectively
It is respectively equipped with electromagnetic valve in end branch of giving vent to anger.
6. according to claim 4 or 5 top cycle speed test device it is characterised in that：Described air blowing gas circuit includes using
In the main gas circuit connecting source of the gas, air blowing gas circuit includes being arranged between main gas circuit and described Laval nozzle structure and being arranged in parallel
Tie point and the second branch road, tie point be provided with for control to described air blowing gas circuit give vent to anger end output gas
The flow control valve of total flow, the second branch road is provided with pressure reduction structure and for making the second branch road lead when tie point disconnects
Logical, make the second branch road disconnect when tie point turns on on-off control valve.
7. top cycle according to claim 6 speed test device it is characterised in that：Described on-off control valve is to be arranged in
The check valve in described pressure reduction structure downstream, described, pressure reduction structure is air relief valve, in described air relief valve and check valve on the second branch road
Between be additionally provided with overflow valve.
8. according to claim 4 or 5 top cycle speed test device it is characterised in that：Test device includes testing stand,
Described Laval nozzle structure is arranged on described testing stand apart from adjustable with corresponding gyro wheel in the horizontal, described Lavalle
Nozzle structure drops adjustable being arranged on described testing stand vertically raised.
9. top cycle according to claim 8 speed test device it is characterised in that：Described testing stand is provided with jet pipe peace
Shelve, jet pipe installing rack include column and with column hinge mounted be transversely mounted bar, described Laval nozzle structure is arranged on
Described it is transversely mounted on bar and is realized in Laval nozzle structure perpendicular by the described hinged cooperation being transversely mounted bar and column
Lift adjustment upwards.
10. top cycle according to claim 8 speed test device it is characterised in that：Described speed measuring system includes
The photoelectric sensor rotating for monitor gyro wheel, photoelectric sensor is arranged on biography with corresponding gyro wheel apart from adjustable on vertical
On sensor installing plate, sensor installing plate supports and is arranged on described testing stand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620893303.5U CN205982311U (en) | 2016-08-17 | 2016-08-17 | Top wheel speed testing arrangement and blowing air system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620893303.5U CN205982311U (en) | 2016-08-17 | 2016-08-17 | Top wheel speed testing arrangement and blowing air system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205982311U true CN205982311U (en) | 2017-02-22 |
Family
ID=58030926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620893303.5U Active CN205982311U (en) | 2016-08-17 | 2016-08-17 | Top wheel speed testing arrangement and blowing air system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205982311U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124795A (en) * | 2016-08-17 | 2016-11-16 | 凯迈（洛阳）气源有限公司 | A kind of top cycle speed test device and scavenger system thereof |
-
2016
- 2016-08-17 CN CN201620893303.5U patent/CN205982311U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124795A (en) * | 2016-08-17 | 2016-11-16 | 凯迈（洛阳）气源有限公司 | A kind of top cycle speed test device and scavenger system thereof |
| CN106124795B (en) * | 2016-08-17 | 2022-07-29 | 凯迈（洛阳）气源有限公司 | Gyro wheel rotating speed testing device and blowing system thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101397641B1 (en) | Control Method of a Stand For Hanging Banner | |
| CN109018430B (en) | Rotorcraft blade performance test bench | |
| CN204115971U (en) | A kind of building curtain wall dynamic watertightness performance axial flow blower pick-up unit | |
| CN209387364U (en) | A kind of device monitoring atmospheric haze pollution sources | |
| CN206281969U (en) | Tunnel radar Quick detection intelligent mounting system | |
| WO2022109819A1 (en) | Novel construction engineering atmospheric environment measurement device | |
| CN103335773A (en) | Pipeline gas pressure measuring device | |
| CN207066714U (en) | For gathering wind speed and the horizontal wind speed instrument support of vertically adjustable multipoint observation in wind-tunnel | |
| CN206399592U (en) | A kind of automatic detection and the aircraft center mass measuring device for eliminating side force | |
| CN205982311U (en) | Top wheel speed testing arrangement and blowing air system thereof | |
| CN102636141A (en) | High-precision air pressure type cable length measuring device | |
| CN100464163C (en) | Assistant nozzle jet air flow measuring device | |
| CN208953261U (en) | Nozzle performance test macro | |
| CN207730152U (en) | A kind of moving contact rail detection device | |
| CN208860642U (en) | A kind of rotary type sand-taped instrument | |
| CN205617214U (en) | On -vehicle pavement detection device of multi -angle | |
| CN213422016U (en) | Width detection device for bridge cracks | |
| CN204241247U (en) | A kind of distributed effect proving installation of liquid distribution trough | |
| CN207528224U (en) | A kind of bridge pier tilt detecting device | |
| CN202522218U (en) | High-precision air-pressure-type cable meter counter | |
| CN106706212A (en) | Aircraft center-of-mass measurement device capable of realizing automatic detection and eliminating yawing force | |
| CN106124795A (en) | A kind of top cycle speed test device and scavenger system thereof | |
| CN208904530U (en) | A kind of maintenance unit of mid & low-voltage line equipment distribution engineering system | |
| CN207488446U (en) | Substrate detection apparatus | |
| CN209043565U (en) | A kind of wind-tunnel inner section flowing field stability measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |