CN206387376U - Compressor tip clearance measurement apparatus - Google Patents
Compressor tip clearance measurement apparatus Download PDFInfo
- Publication number
- CN206387376U CN206387376U CN201621483554.2U CN201621483554U CN206387376U CN 206387376 U CN206387376 U CN 206387376U CN 201621483554 U CN201621483554 U CN 201621483554U CN 206387376 U CN206387376 U CN 206387376U
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- China
- Prior art keywords
- tip clearance
- data acquisition
- optical fiber
- measurement apparatus
- fiber switch
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Abstract
The utility model is related to a kind of compressor tip clearance measurement apparatus, including 8 blade data acquisition modules, the controllers of NI cRIO 9036, the first optical fiber switch, the second optical fiber switch are connected with the industrial computer；Each blade data acquisition module includes capacitance sensor group, signal condition unit group and high-speed data acquisition card；Capacitance sensor group in each blade data acquisition module passes sequentially through signal condition unit and high-speed data acquisition card and is connected with the controllers of NI cRIO 9036；The controllers of NI cRIO 9036 pass sequentially through the first optical fiber switch, the second optical fiber switch and are connected with the industrial computer.The utility model can realize the high speed acquisition and data transfer of signal, can meet the demand of compressor tip clearance in-site measurement.
Description
Technical field
The utility model is related to compressor tip clearance measurement apparatus, more particularly to a kind of compressor tip clearance measurement dress
Put.
Background technology
Tip clearance refers to the radial distance between rotor blade tip and casing.For compressor, steam turbine and combustion gas wheel
Tip clearance is an important design parameter for the turbomachineries such as machine, and the control of tip clearance is to improve unit aeroperformance, carry
The high very important link of unit efficiency.Tip clearance control basic goal be：Make tip clearance as small as possible, to reduce gas
Flow dew loss, it is ensured that unit obtains operating efficiency as high as possible；Guarantee has appropriate gap, prevents because of blade tip and casing phase
Touch and influence unit safety.The on-line monitoring of tip clearance is pacified for compressor design, research blade vibration and guarantee unit
Row for the national games is significant.Application request：Gather the signal of multiple capacitance sensors；Signal will be transmitted to Control Room,
300 meters of transmission range；Site environment is severe, and acquisition system needs reliable and stable.
Utility model content
In order to solve the above mentioned problem of tip clearance measuring system presence, the utility model is provided between a kind of compressor blade tip
Gap measurement apparatus.
According to one side of the present utility model, there is provided a kind of compressor tip clearance measurement apparatus, including 8 blades
Data acquisition module, NI cRIO-9036 controllers, the first optical fiber switch, the second optical fiber switch connect with the industrial computer
Connect；Each blade data acquisition module includes capacitance sensor group, signal condition unit group and high-speed data acquisition card；
Capacitance sensor group in each blade data acquisition module passes sequentially through signal condition unit and high-speed data acquisition card
It is connected with the NI cRIO-9036 controllers；The NI cRIO-9036 controllers pass sequentially through the first optical fiber switch,
Two optical fiber switch are connected with the industrial computer.
Further, each capacitance sensor group includes 4 capacitance sensors, each signal condition unit
Group includes 4 signal condition units；The capacitance sensor of each capacitance sensor group and each signal condition list
The signal condition unit of tuple connects one to one.
Further, each signal condition unit is connected with the high-speed data acquisition card by coaxial cable.
Further, the NI cRIO-9036 controllers are connected with the first optical fiber switch by netting twine.
Further, first optical fiber switch is connected with the second optical fiber switch by optical cable.
Further, second optical fiber switch is connected with industrial computer by netting twine.
Further, the high-speed data acquisition card uses NI 9223, and highest sample frequency is up to 1MHz.
Further, the high-speed data acquisition card is plugged on the NI cRIO-9036 controllers.
The compressor tip clearance measurement apparatus that the utility model is provided, had both met the requirement of high-speed signal acquisition, again
Site environment ill effect is taken into account；Carried out data transmission by the way of optical fiber switch, solve and passed by Ethernet
It is defeated can only it is undamped transmission 100 meters the problem of, be at best able to transmission 500 meters, facilitate user Control Room carry out data check with
Acquisition control.
Brief description of the drawings
Fig. 1 is the structured flowchart for the compressor tip clearance measurement apparatus that the utility model embodiment is proposed.
Embodiment
As shown in figure 1, the utility model embodiment provides a kind of compressor tip clearance measurement apparatus, including 8 blades
Data acquisition module, NI cRIO-9036 controllers, the first optical fiber switch, the second optical fiber switch connect with the industrial computer
Connect；Each blade data acquisition module includes capacitance sensor group, signal condition unit group and high-speed data acquisition card.Each
Capacitance sensor group in blade data acquisition module passes sequentially through signal condition unit and high-speed data acquisition card and NI
CRIO-9036 controllers are connected.NI cRIO-9036 controllers pass sequentially through the first optical fiber switch, the second optical fiber switch with
Industrial computer is connected.
Each capacitance sensor group includes 4 capacitance sensors, and each signal condition unit group includes 4 signals
Conditioning unit；Each a pair of the signal condition unit 1 of the capacitance sensor of capacitance sensor group and each signal condition unit group
It should connect.Each signal condition unit is connected with high-speed data acquisition card by coaxial cable.Capacitance sensor, which is used to experience, presses
Capacitance variations when contracting machine blade is inswept.The signal that capacitance sensor is obtained is changed into voltage signal by signal condition unit.It is high
Fast data collecting card is used to carry out analog-to-digital conversion to voltage signal.High-speed data acquisition card uses the capture cards of model NI 9223,
Its highest sample frequency is 1MHz, more than the 700kHz of sensor signal sample frequency requirement.
NI cRIO-9036 controllers are connected with the first optical fiber switch by netting twine.First optical fiber switch and the second light
Fine interchanger is connected by optical cable.The optical cable uses four core multimode optical cables, and maximum supports transmission range to be 500 meters.Industry control equipment
There is gigabit Ethernet mouthful, be connected with the second optical fiber switch by netting twine, a width of 125MBps of highest band.High-speed data acquisition card
Using the capture cards of NI 9223.The capture cards of NI 9223 are inserted on NI cRIO-9036 controllers, and data enter through pci bus to be controlled
The FPGA of device backboard processed.The collection of software control data on industrial computer and the analysis and display for carrying out data.
The compressor tip clearance measurement apparatus that the utility model is provided, gathers the signal of 32 passages, and sample frequency is
1MHz, each data point is acquired using 16 FXP form data, data volume=32*1M*16b/8b=64MBps per second,
Connected between high-speed data acquisition card and NI cRIO-9036 controllers using PCI buses, band is wider than 100MB, capture card and control
Data transfer between device processed can be met.Carried out data transmission between industrial computer and NI cRIO-9036 by TCP/IP modes, NI
CRIO-9036 has 1.33GHz double-core Intel Atom processors, and processor performance meets the requirement of data transfer.
The compressor tip clearance measurement apparatus that the utility model is provided has the advantages that：
1. using the combination of NI cRIO-9036 controllers and the capture cards of NI 9223, both meet high-speed signal acquisition
It is required that, site environment ill effect has been taken into account again.
2. being carried out data transmission by the way of optical fiber switch, solve and undamped can only be transmitted by Ethernet transmission
100 meters of the problem of, 500 meters of transmission is at best able to, facilitates user to carry out data in Control Room and check and acquisition control.
3. for single controller, 64MBps data can be handled, i.e., when sample frequency is 1MHz, it can adopt
Collect the data of 32 passages, with higher scalability.
Claims (8)
1. a kind of compressor tip clearance measurement apparatus, it is characterised in that：Including 8 blade data acquisition modules, NI cRIO-
9036 controllers, the first optical fiber switch, the second optical fiber switch are connected with industrial computer；Each blade data acquisition module
Include capacitance sensor group, signal condition unit group and high-speed data acquisition card；In each blade data acquisition module
Capacitance sensor group pass sequentially through signal condition unit and high-speed data acquisition card and connect with the NI cRIO-9036 controllers
Connect；The NI cRIO-9036 controllers pass sequentially through the first optical fiber switch, the second optical fiber switch and connected with the industrial computer
Connect.
2. compressor tip clearance measurement apparatus according to claim 1, it is characterised in that each capacitance sensor
Group includes 4 capacitance sensors, and each signal condition unit group includes 4 signal condition units；Each electricity
The capacitance sensor and the signal condition unit of each signal condition unit group for holding sensor group connect one to one.
3. compressor tip clearance measurement apparatus according to claim 2, it is characterised in that each signal condition list
It is first to be connected with the high-speed data acquisition card by coaxial cable.
4. compressor tip clearance measurement apparatus according to claim 1, it is characterised in that the NI cRIO-9036 controls
Device processed is connected with the first optical fiber switch by netting twine.
5. the compressor tip clearance measurement apparatus according to claim any one of 1-4, it is characterised in that first light
Fine interchanger is connected with the second optical fiber switch by optical cable.
6. the compressor tip clearance measurement apparatus according to claim any one of 1-4, it is characterised in that second light
Fine interchanger is connected with industrial computer by netting twine.
7. the compressor tip clearance measurement apparatus according to claim any one of 1-4, it is characterised in that the high speed number
NI 9223 is used according to capture card, highest sample frequency is up to 1MHz.
8. the compressor tip clearance measurement apparatus according to claim any one of 1-4, it is characterised in that the high speed number
It is plugged on according to capture card on the NI cRIO-9036 controllers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621483554.2U CN206387376U (en) | 2016-12-30 | 2016-12-30 | Compressor tip clearance measurement apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621483554.2U CN206387376U (en) | 2016-12-30 | 2016-12-30 | Compressor tip clearance measurement apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206387376U true CN206387376U (en) | 2017-08-08 |
Family
ID=59490713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621483554.2U Active CN206387376U (en) | 2016-12-30 | 2016-12-30 | Compressor tip clearance measurement apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206387376U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109373942A (en) * | 2018-10-12 | 2019-02-22 | 北京理工大学 | A kind of phase acquisition methods in tip clearance measuring system based on Vivado HLS |
-
2016
- 2016-12-30 CN CN201621483554.2U patent/CN206387376U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109373942A (en) * | 2018-10-12 | 2019-02-22 | 北京理工大学 | A kind of phase acquisition methods in tip clearance measuring system based on Vivado HLS |
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