CN106015029B - A kind of system and method for measuring pump impeller blade surface pressing - Google Patents
A kind of system and method for measuring pump impeller blade surface pressing Download PDFInfo
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- CN106015029B CN106015029B CN201610313026.0A CN201610313026A CN106015029B CN 106015029 B CN106015029 B CN 106015029B CN 201610313026 A CN201610313026 A CN 201610313026A CN 106015029 B CN106015029 B CN 106015029B
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- impeller blade
- impeller
- pump
- piezoelectric film
- film sensor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention belongs to pump technology field, a kind of system and method for measuring pump impeller blade surface pressing is disclosed.The system includes piezoelectric film sensor, signaling device, signal receiving device, data acquisition and monitoring system, computer；The present invention process be：Piezoelectric film sensor is attached on pump impeller blade working face and the impeller blade back side, and its lead introduces the radial hole of pump shaft by the metallic channel of back shroud of impeller, and then introduces the axial hole of pump shaft；Signaling device is installed close to shaft coupling side on the right side of axial hole；Pressure signal is converted into data signal and is wirelessly transferred by signaling device, and signal reception is carried out by signal receiving device, and then by digital data transmission to data acquisition and monitoring system；After all signal acquisitions are finished, computer analysis is transferred to.The present invention can not only solve that existing method applicability is low, the low problem of precision, also have the advantages that easy for installation, flexible.
Description
Technical field
The invention belongs to pump technology field, refer in particular to be related to a kind of system for measuring pump impeller blade surface pressing and side
Method.
Background technology
Pump is mainly used in the mechanical energy of prime mover to be converted to the energy of liquid as a kind of universal machine, and its species is numerous
It is many, all it is widely used in the high sciemtifec and technical sphere such as each department of national economy and space flight ship.When pump is run under off-design behaviour,
The instability problems such as generally existing pressure fluctuation, so as to cause vibration and noise, when serious the structural vibration of pump group can aggravate,
Sometimes resonance can also be caused.Therefore, it is necessary to which the vibration for taking certain measure to predict and reduce pump, improves its stable
Property.At present, it is the reliable method of most critical that the pressure fluctuation situation in pump is analyzed using the method for test measurement.But it is due to
The reasons such as rotation, the shape of blade, the method for measuring blade surface pressure is also immature at present.As Chinese patent literature is recorded
A kind of pressure measurement method under rotation status【Application number：201210262085.1；Publication No.：CN102798496A】Describe
The measuring method of pressure under a kind of rotation status, but pressure sensor is arranged in the mounting hole of two sides, is not applied to
In the pressure measxurement of blade surface；A kind of unsteady pressure test device in centrifugal blade surface【Application number：
201510418997.7；Publication No.：CN104990661A】, one kind is described by being punched on blade, by pressure sensor cloth
Put in blade interior to test the method for centrifugal blade surface pressing, but be due to that blade is typically relatively thin, pressure sensor mistake
The lead of big and pressure sensor such as easily winds at the reason when rotated, and applicable surface is narrow.
The content of the invention
The problem of existing for above-mentioned existing measuring method, the present invention, which proposes one kind, can measure pump impeller blade surface
The system and generality method of pressure, it is intended to the problem of solving measurement blade surface pressure at present, propose to be applied to centrifugal pump, axle
Flow the measuring method of the versatility impeller blade surface pressing of pump and mixed-flow pump.To achieve these goals, using following technology
Scheme：
A kind of system for measuring pump impeller blade surface pressing, including piezoelectric film sensor, signaling device, signal
Reception device, data acquisition and monitoring system, computer, wherein, posted with the impeller blade back side in impeller blade working face
Piezoelectric film sensor, piezoelectric film sensor is connected by lead with signaling device；The signaling device is installed
On the right side of pump shaft axial hole close to shaft coupling side；
The signal receiving device is connected with data acquisition and monitoring system；Data acquisition and monitoring system connect with computer
Connect；
Pass through wireless transmission signal between the signaling device and signal receiving device.
M piezoelectric film sensor is posted at the impeller blade working face and the impeller blade back side respectively；Wherein, piezoelectricity is thin
The quantity M of film sensors can be according to formula M=[(D2-dh)/80+3/4] calculate obtain, b in formula2For impeller outlet width, D2For
Impeller outlet diameter；
N number of measuring point is uniformly distributed on each piezoelectric film sensor, the quantity N of measuring point is by formula N=[(b2+10)/15]
Calculating is obtained, in formula, dhFor impeller hub diameter.
Equally distributed N number of measuring point on the piezoelectric film sensor, the pressure signal measured by each measuring point passes through
A piece lead is drawn, and the lead of N number of measuring point collects for one, is drawn from piezoelectric film sensor.
There is metallic channel on back shroud of impeller, metallic channel is located at inlet edge of impeller blade, and gets through vertically；Wire
Groove axial width is 3mm, and radial width is 3.5mm, and the angle of metallic channel and the keyway of impeller in itself is 180 °, can avoid it
Weakening to back shroud of impeller intensity.
There are radial hole and axial hole on pump shaft, the diameter of radial hole and axial hole is d1=d/10, wherein d are that pump shaft is straight
Footpath；Axial hole is connected by left radial hole with back shroud of impeller metallic channel；
The lead of the piezoelectric film sensor passes sequentially through back shroud of impeller, metallic channel, radial hole, axial hole and signal
Issue device is connected.
Further, intersection arrangement of the lead of the piezoelectric film sensor along impeller blade and back shroud of impeller, edge
The metallic channel of back shroud of impeller guides the radial hole of pump shaft into, guides axial hole into by radial hole, and then guide on the right side of axial hole
Signaling device.
A kind of method for measuring pump impeller blade surface pressing, comprises the following steps：
(1) it is attached to the piezoelectric film sensor measurement pump impeller blade surface at impeller blade working face and the impeller blade back side
Pressure, signaling device is transferred to by lead；
(2) signal receiving device receives the wireless signal sent by signaling device by its external trigger,
And data acquisition and monitoring system are transferred signals to, after the pressure signal measurement of all measuring points is finished, transfer signals to
Computer is analyzed.
The beneficial effects of the invention are as follows：
(1) arrangement of piezoelectric film sensor and wireless signal transmitting-receiving mode in the present invention, solve pump shaft rotation
The problem of measurement impeller blade surface pressing brought is difficult, can avoid because of the wire wound problem that arrangement lead is produced, and beat
The problems such as axle intensity that hole is caused declines, the measurement of impeller blade surface pressing when realizing pump rotation.
(2) piezoelectric film sensor is attached on impeller blade surface by the present invention, and applicability is wider, can be not only used for circle
The surface pressure measurement of post blade, it may also be used for the surface pressure measurement of distortion type blade.
(3) piezoelectric film sensor of the present invention can realize freely arranging for measuring point, the damage to impeller blade
It is smaller, it is ensured that the intensity of impeller blade.
(4) arrangement of piezoelectric film sensor of the present invention has generality for pump, is applicable not only to centrifugal pump, also
Suitable for axial-flow pump and mixed-flow pump, and do not limited by pump installation size.
(5) pump impeller blade surface pressure measurement method of the present invention, with precision is high, high resolution and anti-dry
The advantages of immunity can be good, can dynamically measure impeller blade surface pressing under pump full working scope.
(6) signaling device is arranged in axle close to the side of motor by the present invention, than the reception signal of wireless senser
By force, precision is high.
Brief description of the drawings
Fig. 1 is test device schematic diagram of the invention；
Fig. 2 is scheme of installation of the piezoelectric film sensor on impeller, A- wheel backface schematic diagrames in the present invention；B- leaves
Take turns working face schematic diagram；
Fig. 3 is the partial enlarged drawing at A in Fig. 2；
Fig. 4 arranges schematic diagram for the radial hole of pump shaft with axial hole；
Description of reference numerals：
1- signal receiving devices, 2- data acquisitions and monitoring system, 3- computers, 4- impeller blades, 5- piezoelectric membranes are passed
Sensor, 6- leads, 7- impellers, 8- front shroud of impeller, 9- back shroud of impeller, the 10- impeller blades back side, 11- impeller outlets side,
12- impeller blades working face, 13- impeller inlets side, 14- metallic channels, 15- left radials hole, 16- pump shafts, 17- axial holes, 18-
Signaling device.
Embodiment
Embodiment：
One specific revolution is 165 centrifugal pump, and its major parameter is：Impeller outlet width b2=37mm, impeller outlet is straight
Footpath D2=278mm, impeller hub diameter dh=37mm, pump shaft diameter d=25mm.
As shown in Figure 1, the pressure vibration signal of the pump installation impeller blade is surveyed by the measuring point of piezoelectric film sensor 5
After obtaining, signaling device 18 is transferred to by lead 6, pressure signal is converted to data signal and carried out by signaling device 18
It is wirelessly transferred, signal receiving device 1 receives the data signal sent by signaling device 18 by its external trigger, and will
After the pressure signal measurement of all measuring points is finished, data signal is passed to data acquisition and monitoring system 2 for digital data transmission
It is defeated to be analyzed to computer 3.
As shown in Figure 2, the impeller blade working face 12 is thin with uniformly pasting M group piezoelectricity on the impeller blade back side 10 respectively
N number of measuring point is uniformly distributed on film sensors 5, each piezoelectric film sensor 5, according to formula M=[(D2-dh)/80+3/4], N=
[(b2+ 10)/15] and experimental pump parameter, N=3, M=4 can be calculated.
As shown in Figure 3, it is the metallic channel that 3mm, radial width are 3.5mm to have axial width on the back shroud of impeller 9
14, metallic channel 14 extends to the junction with pump shaft 16.
As shown in Figure 4, the pump shaft 16 be provided with radial hole 15 and axial hole 17, axial hole 17 by radial hole 15 with
Metallic channel 14 is connected, according to calculation formula d1The parameter of=d/10 and impeller of pump can be obtained, radial hole 15 and axial hole 17 it is straight
Footpath is 2.5mm.
As shown in Figure 2, the piezoelectric film sensor 5 is fixed on impeller blade working face 12 and the impeller blade back side 10
On, the lead 6 of the piezoelectric film sensor 5 passes sequentially through back shroud of impeller 9, metallic channel 14, radial hole 15 and axial hole 17
The signaling device 18 on right side is connected.
As shown in Figure 2, by piezoelectric film sensor 5 and impeller blade working face 12 and the strength of the impeller blade back side 10
Gluing is pasted, it is ensured that the tight type pasted.As shown in Figure 2, the piezoelectric film sensor lead 6 through back shroud of impeller 9 is filled
Enter pump shaft 16, the one end of lead 6 is connected with piezoelectric film sensor 5, other end signaling device 18 is connected.By impeller 7 and pump
Body, pump shaft 16 are assembled.After installation, device starts, when the pump is operated, is passed by the pressure film on impeller blade surface
The pressure on the measurement pump impeller blade of sensor 5 surface, signaling device 18 is transferred to by lead 6；Signal receiving device 1 passes through
Its external trigger receives the wireless signal sent by signaling device 18；And by the digital data transmission received to data
Collection and monitoring system 2；After the pressure signal measurement of all measuring points is finished, these digital data transmissions are entered to computer 3
Row analysis.
Claims (6)
1. a kind of system for measuring pump impeller blade surface pressing, it is characterised in that including piezoelectric film sensor (5), signal
Issue device (18), signal receiving device (1), data acquisition and monitoring system (2), computer (3), it is characterised in that：
Piezoelectric film sensor (5) is posted in impeller blade working face (12) and the impeller blade back side (10), piezoelectric membrane is passed
Sensor (5) is connected by lead (6) with signaling device (18)；The signaling device (18) is arranged on pump shaft axial hole
(17) right side is close to shaft coupling side；
The signal receiving device (1) is connected with data acquisition and monitoring system (2)；Data acquisition and monitoring system (2) and meter
Calculation machine (3) is connected；
Pass through wireless transmission signal between the signaling device (18) and signal receiving device (1)；
The M piezoelectric film sensors (5) are posted in the impeller blade working face (12) and the impeller blade back side (10) respectively,
Wherein, the quantity M of piezoelectric film sensor (5) can be according to formula M=[(D2-dh)/80+3/4] calculate obtain, in formula, D2For leaf
Take turns outlet diameter, dhFor impeller hub diameter.
2. according to claim 1 it is a kind of measure pump impeller blade surface pressing system, it is characterised in that each pressure
Conductive film sensor is uniformly distributed N number of measuring point on (5), wherein, the quantity N of measuring point is by formula N=[(b2+ 10)/15] calculate
Arrive, in formula, b2For impeller outlet width.
3. according to claim 2 it is a kind of measure pump impeller blade surface pressing system, it is characterised in that the piezoelectricity is thin
Equally distributed N number of measuring point on film sensors (5), the pressure signal measured by each measuring point is drawn by a lead (6),
The lead of N number of measuring point collects for one, is drawn from piezoelectric film sensor (5).
4. a kind of system for measuring pump impeller blade surface pressing according to claim 1, it is characterised in that
The angle being provided with back shroud of impeller (9) between metallic channel (14), the keyway of metallic channel (14) and impeller in itself is 180 °；
Metallic channel (14) is located at close to inlet edge of impeller blade (13) place, and gets through vertically；
There are radial hole (15) and axial hole (17) on pump shaft (16), axial hole (17) passes through left radial hole (15) and impeller bonnet
Plate metallic channel (14) is connected；
The lead (6) of the piezoelectric film sensor (5) passes sequentially through back shroud of impeller (9), metallic channel (14), radial hole
(15), axial hole (17) is connected with signaling device (18).
5. a kind of system for measuring pump impeller blade surface pressing according to claim 4, it is characterised in that
Intersection of the lead (6) of the piezoelectric film sensor (5) along impeller blade (4) and back shroud of impeller (9) is arranged, along leaf
The metallic channel (14) of wheel back shroud (9) guides the radial hole (15) of pump shaft into, and axial hole (17) is guided into by radial hole (15), and then
The signaling device (18) guided on the right side of axial hole.
6. a kind of system for measuring pump impeller blade surface pressing according to claim 4, it is characterised in that
The axial width of the metallic channel (14) is that 3mm, radial width are 3.5mm；
The radial hole (15) of the pump shaft and the diameter of axial hole (17) are d1=d/10, wherein d are pump shaft diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610313026.0A CN106015029B (en) | 2016-05-12 | 2016-05-12 | A kind of system and method for measuring pump impeller blade surface pressing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610313026.0A CN106015029B (en) | 2016-05-12 | 2016-05-12 | A kind of system and method for measuring pump impeller blade surface pressing |
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| Publication Number | Publication Date |
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| CN106015029A CN106015029A (en) | 2016-10-12 |
| CN106015029B true CN106015029B (en) | 2017-09-26 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254177A (en) * | 2016-12-29 | 2018-07-06 | 石河子大学 | It is a kind of can on air real time test structural parameters and kinematic parameter helixes feed equipment experimental bench |
| CN109916293B (en) * | 2019-03-20 | 2020-08-04 | 中国航发湖南动力机械研究所 | Installation process of strain gauge |
| CN111577664A (en) * | 2020-05-14 | 2020-08-25 | 中国航发沈阳发动机研究所 | Stator blade pressure pulsation measuring device |
| CN112229601A (en) * | 2020-10-12 | 2021-01-15 | 中国船舶工业集团公司第七0八研究所 | Pulsating pressure test system for rotating impeller of water jet propulsion hydraulic model |
| CN113309710B (en) * | 2021-05-25 | 2022-11-01 | 清华大学 | Measuring device and measuring method for underwater mode of rotary impeller machine |
| CN113417868B (en) * | 2021-07-19 | 2022-08-26 | 南水北调东线江苏水源有限责任公司 | Full-sensing water pump, pump shaft clearance measuring method and water pump monitoring system |
| CN114002061B (en) * | 2021-10-21 | 2024-02-20 | 山东鑫海矿业技术装备股份有限公司 | Impeller monitoring method, equipment and medium of vortex breaker based on radial force |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5681432A (en) * | 1979-12-07 | 1981-07-03 | Hitachi Ltd | Surface-pressure sensor |
| US8152440B2 (en) * | 2008-08-26 | 2012-04-10 | General Electric Company | Resistive contact sensors for large blade and airfoil pressure and flow separation measurements |
| CN102798496B (en) * | 2012-07-25 | 2014-04-02 | 北京航空航天大学 | Method for measuring pressure in rotating state |
| CN104458102B (en) * | 2014-12-12 | 2017-01-25 | 国家海洋技术中心 | Tidal current energy power generation blade surface pressure testing device |
| CN104819801B (en) * | 2015-05-14 | 2018-06-08 | 中国空气动力研究与发展中心设备设计及测试技术研究所 | A kind of fan blade pressure distribution dynamic measuring method |
| CN104990661B (en) * | 2015-07-16 | 2017-12-05 | 江苏大学 | A kind of unsteady pressure test device in centrifugal blade surface |
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