CN109708835A - A kind of steam turbine blade intrinsic frequency measurement excitation system - Google Patents
A kind of steam turbine blade intrinsic frequency measurement excitation system Download PDFInfo
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- CN109708835A CN109708835A CN201910132759.8A CN201910132759A CN109708835A CN 109708835 A CN109708835 A CN 109708835A CN 201910132759 A CN201910132759 A CN 201910132759A CN 109708835 A CN109708835 A CN 109708835A
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- pneumatic operated
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- operated valve
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Abstract
A kind of steam turbine blade intrinsic frequency measurement excitation system, is related to the frequency measurement of steam turbine blade.Existing measuring system serious waste of resources, time-consuming and laborious security performance are low.Air compressor, air accumulator, air filter, drying machine and regulating valve are sequentially connected by admission line, and air compressor, air accumulator, air filter, drying machine, regulating valve, controller and constant voltage source are arranged outside dynamic balancing sealed cylinder, pneumatic operated valve, stainless steel corrugated flexible hose and nozzle are arranged in dynamic balancing sealed cylinder, regulating valve is connected by one end of stainless steel corrugated flexible hose and pneumatic operated valve, the other end of pneumatic operated valve is connected by the air inlet of stainless steel corrugated flexible hose and nozzle, the movable vane piece of the gas outlet face rotor of nozzle, constant voltage source is connected on pneumatic operated valve by power supply circuit, one controller is installed on power supply circuit.The present invention is used for steam turbine blade natural frequency measurement,.
Description
Technical field
The present invention relates to the frequency measurements of steam turbine blade more particularly to a kind of steam turbine blade intrinsic frequency to measure
Excitation system.
Background technique
Steam turbine blade is the critical component of steam turbine operation, not only to consider the quiet of movable vane piece when designing movable vane piece
Intensity, it is also contemplated that the fatigue resistance of movable vane piece, wherein the key of fatigue resistance examination is to grasp the vibration characteristics of movable vane piece.Movable vane piece
Vibration characteristics be mainly shown as in the design blade intrinsic frequency calculate, and by actual measurement obtain exact value.Movable vane in the past
It will be every using nitrogen decompression table using several bottles of nitrogen cylinders as gas source feed using nitrogen excitation system when piece intrinsic frequency measures
Nitrogen is delivered to by nozzle by air accumulator and rubber tube after the high pressure nitrogen decompression of a nitrogen cylinder and carries out exciting.Due to dynamic balancing
Space is limited in cylinder, and the nitrogen cylinder quantity arranged in cylinder is also just limited, and when test is frequently necessary to shut down replacement nitrogen cylinder, this
Result in the waste of production cost；Each nitrogen decompression table, which requires accurately to adjust, to be prevented nitrogen cylinder gas supply uneven and causes wave
Take, adjusting is time-consuming and laborious to be also possible to cause the idle situation of nitrogen decompression table due to the intracorporal adverse circumstances of dynamic balancing cylinder；Swash
Air pressure used of shaking is higher and needs stable gas pressure, and this requires used rubber tube is relatively thick and tube wall is thicker, rubber tube is long-term
The words used in the environment full of greasy dirt be easy to cause tube wall to harden and are broken.New compressed air system solves above-mentioned ask
Topic, and it is easy for installation, it is easy to operate, improve the reliability and continuity of excitation system.
Summary of the invention
The technical problem to be solved in the invention is: existing movable vane piece intrinsic frequency measuring system serious waste of resources,
Time-consuming and laborious, security performance is low；And then provide a kind of steam turbine blade intrinsic frequency measurement excitation system.
The present invention to solve above-mentioned technical problem the technical solution adopted is that:
A kind of steam turbine blade intrinsic frequency measurement excitation system includes air compressor, air accumulator, air
Filter, drying machine, regulating valve, pneumatic operated valve, stainless steel corrugated flexible hose, nozzle, controller and constant voltage source, air compressor,
Air accumulator, air filter, drying machine and regulating valve are sequentially connected by admission line, and air compressor, air accumulator, air
Filter, drying machine, regulating valve, controller and constant voltage source are arranged outside dynamic balancing sealed cylinder, pneumatic operated valve, stainless steel ripple
Hose and nozzle are arranged in dynamic balancing sealed cylinder, and regulating valve is connected by one end of stainless steel corrugated flexible hose and pneumatic operated valve,
The other end of pneumatic operated valve is connected by the air inlet of stainless steel corrugated flexible hose and nozzle, the movable vane of the gas outlet face rotor of nozzle
Piece, constant voltage source are connected on pneumatic operated valve by power supply circuit, and a controller is installed on power supply circuit.
Further, shut-off valve is provided on the pipeline between the regulating valve and pneumatic operated valve, and shut-off valve setting exists
Outside dynamic balancing sealed cylinder.
Further, it is connected between the stainless steel corrugated flexible hose and nozzle and pneumatic operated valve by fast joint.
Further, the diameter of the stainless steel corrugated flexible hose is 25mm, thickness of pipe 2mm.
The beneficial effects of the present invention are:
1, when being measured using intrinsic frequency of the compressed air excitation system to movable vane piece, can according to the actual situation into
When row is continuous long or exciting, exciting are no longer influenced by the limitation of tolerance in short-term.
2, in the intrinsic frequency for measuring movable vane piece, it can according to need adjusting exciting pressure at any time, no longer shut down
The pressure regulation work of nitrogen decompression table is carried out in into dynamic balancing cylinder.
3, the present invention uses stainless steel corrugated flexible hose, and corrugated stainless steel tubing diameter is small and can grow in the environment of being full of greasy dirt
Phase normal use is no longer limited frequently replacement pipeline by tubing.
4, carry out movable vane piece intrinsic frequency measurement when, excitation system simplicity quick for installation, start air compressor after can
Directly to carry out test job, the test period is saved.
Detailed description of the invention
Fig. 1 is the overall structure diagram that movable vane piece intrinsic frequency measures excitation system.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments:
Specific embodiment 1: as shown in Figure 1, a kind of steam turbine blade intrinsic frequency measurement described in present embodiment
Excitation system includes air compressor 1, air accumulator 2, air filter 3, drying machine 4, regulating valve 5, pneumatic operated valve 7, stainless steel wave
Line hose, nozzle 9, controller 10 and constant voltage source 11, air compressor 1, air accumulator 2, air filter 3, drying machine 4 and tune
Section valve 5 be sequentially connected by admission line, and air compressor 1, air accumulator 2, air filter 3, drying machine 4, regulating valve 5,
Controller 10 and constant voltage source 11 are arranged outside dynamic balancing sealed cylinder, and pneumatic operated valve 7, stainless steel corrugated flexible hose and nozzle 9 are arranged
In dynamic balancing sealed cylinder, pneumatic operated valve 7 is arranged on the pipeline of a stainless steel corrugated flexible hose, air inlet locating for regulating valve 5
Pipeline is connect with one end of stainless steel corrugated flexible hose locating for pneumatic operated valve 7 by fast joint, stainless steel ripple locating for pneumatic operated valve 7
The other end of hose is connect by other one longer stainless steel corrugated flexible hose with the air inlet of nozzle 9, the gas outlet of nozzle 9
The movable vane piece of face rotor, constant voltage source 11 are connected on pneumatic operated valve 7 by power supply circuit, and a control is installed on power supply circuit
Device 10, controller 10 are used to control the circuit of pneumatic operated valve 7, and constant voltage source 11 is the power supply of pneumatic operated valve 7.
The running parameter for adjusting air compressor 1 after opening air compressor 1 during the test, when air compressor 1
When work, air accumulator 2 can store certain pressure-air as steady testing and be used with air pressure, reduce air compressor
The frequent start-stop of machine 1, compressed air flows through air filter 3 and drying machine 4 filters finely ground particles and water droplet therein, prevents
Contain impurity in the air of compression, prevents steam turbine blade from causing to damage to high-speed rotating movable vane piece when carrying out exciting.
When the compressed air of high pressure flows through regulating valve 5, it can be needed to adjust supply gas pressure according to test, compressed air is through gas
Dynamic valve 7, stainless steel corrugated flexible hose and nozzle 9 carry out exciting to high-speed rotating movable vane piece.
Constant voltage source 11 is that pneumatic operated valve 7 is powered outside cylinder, controller 10 is installed on power supply circuit, by controller
The starting of 10 control pneumatic operated valves 7, when needing to supply progress exciting, controller control pneumatic operated valve 7, which is opened, provides compressed air, temporarily
When not needing to carry out exciting, pneumatic operated valve 7 is locked to prevent compressed air leakage from destroying vacuum environment.
Specific embodiment 2: as shown in Figure 1, on pipeline between regulating valve 5 and pneumatic operated valve 7 described in present embodiment
It is provided with shut-off valve 6, and shut-off valve 6 is arranged outside dynamic balancing sealed cylinder.
Opening stop valve 6 during the test are closed shut-off valve 6 when without test, prevent the leakage due to pipeline
Destroy the intracorporal vacuum environment of dynamic balancing cylinder, the second protection as vacuum environment in dynamic balancing cylinder.
Other compositions and connection type are same as the specific embodiment one.
Specific embodiment 3: passing through between stainless steel corrugated flexible hose and pneumatic operated valve 7 and nozzle 9 described in present embodiment
Fast joint connection.
Other compositions and connection type are identical with embodiment two.
Specific embodiment 4: the diameter of stainless steel corrugated flexible hose described in present embodiment is 25mm, thickness of pipe 2mm.
Other compositions and connection type are the same as the specific implementation mode 3.
Claims (4)
1. a kind of steam turbine blade intrinsic frequency measures excitation system, it is characterised in that: it includes air compressor (1), storage
Gas tank (2), air filter (3), drying machine (4), regulating valve (5), pneumatic operated valve (7), stainless steel corrugated flexible hose, nozzle (9), control
Device (10) processed and constant voltage source (11), air compressor (1), air accumulator (2), air filter (3), drying machine (4) and adjusting
Valve (5) is sequentially connected by admission line, and air compressor (1), air accumulator (2), air filter (3), drying machine (4),
Regulating valve (5), controller (10) and constant voltage source (11) are arranged outside dynamic balancing sealed cylinder, pneumatic operated valve (7), stainless steel ripple
Hose and nozzle (9) are arranged in dynamic balancing sealed cylinder, and regulating valve (5) passes through air inlet pipeline and stainless steel corrugated flexible hose and gas
One end connection of dynamic valve (7), the other end of pneumatic operated valve (7) are connect with the air inlet of nozzle (9) by stainless steel corrugated flexible hose, are sprayed
The shroud lower part of the gas outlet face rotor blade of mouth (9), constant voltage source (11) are connected to pneumatic operated valve (7) by power supply circuit
On, a controller (10) are installed on power supply circuit.
2. a kind of steam turbine blade intrinsic frequency according to claim 1 measures excitation system, it is characterised in that: described
Regulating valve (5) and pneumatic operated valve (7) between pipeline on be provided with shut-off valve (6), and shut-off valve (6) setting dynamic balancing seal
Outside cylinder.
3. a kind of steam turbine blade intrinsic frequency according to claim 2 measures excitation system, it is characterised in that: described
Stainless steel corrugated flexible hose between pneumatic operated valve (7) and nozzle (9) connect by fast joint.
4. a kind of steam turbine blade intrinsic frequency according to claim 3 measures excitation system, it is characterised in that: described
Stainless steel corrugated flexible hose diameter be 25mm, thickness of pipe 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910132759.8A CN109708835A (en) | 2019-02-21 | 2019-02-21 | A kind of steam turbine blade intrinsic frequency measurement excitation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910132759.8A CN109708835A (en) | 2019-02-21 | 2019-02-21 | A kind of steam turbine blade intrinsic frequency measurement excitation system |
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| CN109708835A true CN109708835A (en) | 2019-05-03 |
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| CN201910132759.8A Pending CN109708835A (en) | 2019-02-21 | 2019-02-21 | A kind of steam turbine blade intrinsic frequency measurement excitation system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095243A (en) * | 2019-06-05 | 2019-08-06 | 哈尔滨汽轮机厂有限责任公司 | A kind of steam turbine blade natural frequency measurement, device |
| CN113237664A (en) * | 2021-05-08 | 2021-08-10 | 大连理工大学 | Gas excitation load applying device |
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| CN209247302U (en) * | 2019-02-21 | 2019-08-13 | 哈尔滨汽轮机厂有限责任公司 | A kind of steam turbine blade intrinsic frequency measurement excitation system |
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2019
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| JPH112586A (en) * | 1997-06-11 | 1999-01-06 | Mitsubishi Heavy Ind Ltd | Blade shaker used in rotational vibration test |
| KR200235907Y1 (en) * | 2001-04-12 | 2001-10-11 | 이학진 | A flexible pipe for connection |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095243A (en) * | 2019-06-05 | 2019-08-06 | 哈尔滨汽轮机厂有限责任公司 | A kind of steam turbine blade natural frequency measurement, device |
| CN110095243B (en) * | 2019-06-05 | 2023-12-01 | 哈尔滨汽轮机厂有限责任公司 | Measuring device for natural frequency of moving blade of steam turbine |
| CN113237664A (en) * | 2021-05-08 | 2021-08-10 | 大连理工大学 | Gas excitation load applying device |
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