CN202707521U - Pump hydraulic model testing device - Google Patents
Pump hydraulic model testing device Download PDFInfo
- Publication number
- CN202707521U CN202707521U CN 201220425787 CN201220425787U CN202707521U CN 202707521 U CN202707521 U CN 202707521U CN 201220425787 CN201220425787 CN 201220425787 CN 201220425787 U CN201220425787 U CN 201220425787U CN 202707521 U CN202707521 U CN 202707521U
- Authority
- CN
- China
- Prior art keywords
- impeller
- test
- pump
- bearing
- pump shaft
- 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.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The utility model relates to a pump hydraulic model testing device. The pump hydraulic model testing device comprises an inflow section, a pump body, an impeller, an impeller nut, ball bearings, guide vanes, an impeller cover, a pump shaft, mechanical seals, double-row radial-thrust ball bearings, bearing suspensions, bearing supports, radical direction cantilever dynamometry devices and shaft direction proving rings. The device is capable of facilitating accomplishing of an efficiency test, a cavitation test, a runaway speed test, a pressure fluctuation test, a whole characteristic test, a shaft direction force measuring test and a radical direction force measuring test. A whole characteristic curve of hydraulic machinery is an important technical base for hydraulic transient process analysis, safety precautions research and system optimization design.
Description
Technical field: the utility model relates to water pump waterpower model test apparatus structure.
Background technique: hydraulic model test is to recur (or preview) current phenomenon similar to prototype with the means of observation and analysis research water movement rule in model, when the prototype current can not directly measure owing to a variety of causes, when the experiment of general theory mode and simple generalization can not reflect again complicated streamflow regime, just must make special model, test, begin the model test that has scientific basis in modern age 19 end of the centurys, obtained significant progress and widely application 20th century.All Test items of hydraulic model test must be on same test stand and same model equipment carry out, at present pumping plant test General Requirements is efficiency test, cavitation experiment, the characteristic test that flies to escape, pressure pulsation test and force characteristic test.The total external characteristic of water pump is based on theoretical one of the indispensable raw data of pumping station transient process that calculates of external characteristics; pump comelete characteristics is the important technology foundation of carrying out water supplying pump system waterpower analysis of the transition process, safety measure research and water supplying pump Optimized System Design; water pump total external characteristic test conditions is very complicated; obtain difficulty large, available data is very limited.
Summary of the invention: the purpose of this utility model provides the testing apparatus of the test of test waterpower model efficiency, cavitation experiment, pressure pulsation test, total external characteristic test and force characteristic test, with every hydraulic performance of test water pump hydraulic model.
The technical solution of the utility model is:
Water pump waterpower model test apparatus: testing apparatus is horizontal, by inlet segment (1), the pump housing (2), impeller (3), impeller nut (4) ball bearing (5), stator (6), impeller chimney (7), pump shaft (8), mechanical seal (9), double-row angular contact ball bearing (10), bearing suspension (11), bearing bracket (12), radially cantilever forcemeter (13) and axially proving ring (14) composition, the pump housing (2) is the annular pumping chamber structure, impeller chimney (7) is positioned at the pump housing (2) annular pumping chamber entrance, impeller chimney (7) is fixed by inlet segment (1), impeller (3) is installed in an end of pump shaft (8) and locks with impeller nut (4), impeller (3) is positioned at impeller chimney (7), be set with successively fixedly ball bearing (5) and radially forcemeter (13) on impeller (3) the rear portion pump shaft (8), stator (6) exports near impeller (3), as the transition apparatus between impeller (3) and the pump housing (2) annular pumping chamber, pump shaft (8) stage casing placement of mechanical seal ring (9), bearing suspension (11) is connected with the pump housing (2), bearing suspension (11) is supported by the bearing bracket (12) of pump shaft (8) the other end, in the bearing suspension (11) of corresponding bearing bracket (12) Support Position double-row angular contact ball bearing (10) is set, bearing both sides disposed axle to proving ring (14) with the test axial force.
The working principle of this device is:
Water pump waterpower model test apparatus, a side of pump shaft (8) links to each other with motor shaft by torsionmeter, measures motor and is delivered to moment of torsion on the pump shaft and the rotating speed of axle.Impeller (3) is installed in the opposite side of pump shaft, along with pump shaft (8) rotation.Water enters the pump housing through inlet segment (1), boosts via accelerating after impeller (3) rotation, and flows out behind the annular pumping chamber of the stator of flowing through, the pump housing.Between impeller and stator, consider the sound interference effect owing to liquid, the pulsation of pressure is larger, therefore the pressure pulsation measuring point is set; Another one pressure pulsation measuring point is arranged on the annular pumping chamber of the pump housing, and the connection interface of measuring pressure pulsation is provided.On impeller (3) the rear side pump shaft ball bearing (5) is installed, it adopts the radially cantilever forcemeter (13) of overhang metallic elastic material structure element to support, and its crooked little distortion is directly proportional with radial force, measures water and flows through the radial force that impeller produces rotor.Pump shaft (8) stage casing placement of mechanical sealing (9) mainly is comprised of rotating ring (rotating with pump shaft), stationary ring (being fixed on the stator), holddown spring and O-ring seal etc.The bright and clean end face of rotating ring fits tightly on the bright and clean end face of stationary ring by the pressure of spring and water and forms radial seal, finishes axial seal by O-ring seal simultaneously.Bearing suspension (11) is connected with the pump housing (2), and lean on the bearing bracket (12) of pump shaft (8) the other end to support, in the bearing suspension (11) of corresponding bearing bracket (12) Support Position double-row angular contact ball bearing (10) is set, in bearing both sides disposed axle to proving ring (14), the axial force that impeller (2) when work produces passes to axial proving ring (14) by pump shaft (8), the distortion survey axial force after stressed according to axial proving ring (14).
Technological merit of the present utility model is:
1. test shows that two back-to-back load of thrust bearing thereofs of common employing are too large, and to heart weak effect, bearing temperature rise is too high, is unfavorable for the proving ring system works.The utility model has adopted the axial force of double-row angular contact ball bearing carrying rotor, and the running of axle system is comparatively steady.
2. at double-row angular contact ball bearing both sides layout proving ring, paste and encapsulation T shape foil gauge in proving ring outer surface 180 degree directions, form the dynamometry bridge, to test the axial hydraulic thrust that produces because of the impeller boosting, as shown in Figure 2.
3. the reliable running that for axle is, on the utility model impeller rear side pump shaft ball bearing is installed, it adopts the radially cantilever forcemeter support of overhang metallic elastic material structure element, at the inside and outside wall of overhang, each pastes two parallel strain sheets, form the full bridge measurement circuit, measure respectively orthogonal both direction power, as shown in Figure 3.
4. inducer adopts pmma material, is convenient to observe the fluidised form of water in the impeller, the phenomenon when adopting the equipment such as stroboscope to be the flowing state of observable liquid and the incipient cavitations.
Description of drawings:
Fig. 1 is the utility model testing apparatus structural representation
Fig. 2 axial-force testing device schematic diagram
Fig. 3 is radial force testing apparatus schematic diagram
Fig. 4 is table 1
Embodiment:
The utility model as shown in Figure 1 is a kind of water pump waterpower model test apparatus, testing apparatus is horizontal, by inlet segment 1, the pump housing 2, impeller 3, impeller nut 4 ball bearings 5, stator 6, impeller chimney 7, pump shaft 8, mechanical seal 9, double-row angular contact ball bearing 10, bearing suspension 11, bearing bracket 12, radially cantilever forcemeter 13 and axially proving ring 14 compositions, the pump housing 2 is the annular pumping chamber structure, impeller chimney 7 is positioned at the pump housing 2 annular pumping chamber entrances, impeller chimney 7 is fixed by inlet segment 1, impeller 3 is installed in an end of pump shaft 8 and locks with impeller nut 4, impeller 3 is positioned at impeller chimney 7, be set with successively fixedly ball bearing 5 and radially forcemeter 13 on the impeller 3 rear portion pump shafts 8, stator 6 is near impeller 3 outlets, as the transition apparatus between impeller 3 and the pump housing 2 annular pumping chambers, pump shaft 8 stage casing placement of mechanical seal rings 9, bearing suspension 11 is connected with the pump housing 2, bearing suspension 11 is supported by the bearing bracket 12 of pump shaft 8 the other ends, the bearing suspension 11 interior double-row angular contact ball bearings 10 that arrange of corresponding bearing bracket 12 Support Positions, bearing both sides disposed axle to proving ring 14 with the test axial force.
The supplementary notes that the utility model is used:
This use is novel in conjunction with the hydraulic model test platform, finishes testing property and data analysis work.
1) efficiency test:
(1) before efficiency test, model pump more than 30 minutes, is got rid of circulatory system Free Gas body in the running of declared working condition point, should check bearing, sealing, the noise and vibration situation of pump therebetween, and performance test should be carried out under the non-cavitating condition,
(2) the stable rear pilot system of operating condition of test is carried out three tests continuously under without any artificial disturbed condition, each testing time is 30 seconds, the difference of three testing efficiency maximums and minimum of a value should be less than 0.3%, otherwise need re-start test, get the median of three measurements as the last test result, the descending order of test flow is carried out, test is from large-capacity point, proceed to zero delivery finishes always, the unloaded mechanical loss torque of water pump is tested under rotating condition in band runner, pump shaft tie up to air
(3) efficiency calculation formula: η=P
Water/ P
Axle=r * Q
M* H
M/ (M * ω)
＝30×r×Q
M×H
M/π×M×n
In the formula:
P
Water: the hydraulic power kW of model pump
P
Axle: the input power kW of model pump shaft
Q
M: by the flow m of model pump
3/ s
H
M: model lift of pump m
R: the severe N/m of water
3
M: the moment Nm that the model pump shaft transmits
ω: model pump shaft angular velocity of rotation rad/s
N: the test speed r/min of model pump
2) cavitation experiment:
(1) after the system lock, under the 4m condition, move 20min at import water tank low vacuum, the beginning cavitation experiment, from inlet segment observable current in the impeller blade flowing state,
(2) carry out first testing site in without the cavitation situation, complete after first point is tested to vacuumize and strengthen gradually vacuum, in process of the test, keep test speed constant, auxiliary pump rotating speed or stop valve aperture are constant, reduce gradually the net positive suction head of pilot system, the testing site that comparatively dense should be arranged in the zone that the cavitation experiment curve occurs to transfer, after decrease in efficiency is enough, complete this operating point test, in the working range of model pump, at least reply comprises 5 cavitation curves of each water pump model work of lower-capacity point, regulation flow point and large-capacity point
(3) the decrease in efficiency value is take the starting point of cavitation experiment as benchmark, and the net positive suction head during water pump decrease in efficiency 1% is as critical NPSH,
(4) measure simultaneously flow, lift, rotating speed, air horsepower, import degree of vacuum, draw flow-net positive suction head curve,
(5) NPSH value formula: NPSH=H
T1+ h
Atm-h
Va
NPSH: net positive suction head m
h
T1: import gross head m
h
Atm: atmospheric pressure head m
h
Va: pressure for vaporization head m
3) runaway speed:
The rotating speed that the characteristic test that flies to escape is the rating model pump when counter-rotating (water turbine sense of rotation) and axle moment of torsion are zero takes service pump oppositely to supply water during test, with motor reversal, measure the axle moment of torsion and be 0 o'clock tachometer value,
4) pressure pulsation test:
Measure sample frequency 2048HZ, analyze each steady working condition measurement 5 times for carrying out repeatability 20 seconds writing times, test result adopts 97% confidence coefficient double width value,
5) total external characteristic test:
By the valve in the adjusting test loop, service pump and motor speed, finished the test of eight operating conditionss of whole four quadrants of water pump model, be respectively the test of (A) forward pump operating condition, (B) forward water pump adverse current working condition tests, (C) water turbine working condition tests, the negative lift working condition tests of (D) counter-rotating water pump, the test of (E) counter-rotating pump operating condition, (F) counter-rotating water pump adverse current working condition tests, (G) counter-rotating water turbine working condition tests and (H) the forward water pump bear the lift working condition tests.Each duty parameter characteristic is seen the table 1 of Fig. 4.
During four-quadrant is tested, need as required to carry out the high and low pressure measuring point to the lift sensor and switch, regulate the service pump rotating speed, should avoid vibrating the operating mode operation, the test curve of each operating mode should comprise abundant test point, with the reliability of assurance curve,
6) force characteristic test:
Testing apparatus adopts strainometer, T shape foil gauge, 2 parallel strain sheets, computer data acquisition system,
Adherence force monitor strain sheet on the dynamometer element adopts urethane rubber to carry out the waterproof encapsulation,
Axial force testing:
Paste and encapsulation T shape strain rosette in proving ring outer surface 180 degree directions, form the dynamometry bridge, lead-in wire is drawn internally by the d=5mm hole, and the force characteristic pilot system is proofreaied and correct and used high-precision weighing sensor (precision 0.1%) that the axial force dynamometric system is carried out the original position calibration
Axial hydraulic thrust (axial force) test should cover whole ranges of operation, in minimum to being described by enough test points between peak rate of flow,
The radial force test:
In mutually perpendicular two orientation of overhang elasticity sense cell, inside and outside wall, each pastes two parallel strain sheets, form the full bridge measurement circuit, measure respectively orthogonal both direction power, with standard test weight the radial force dynamometric system is carried out the original position calibration, the measuring range of radial force should cover all main ranges of operation, to being described by enough test points between peak rate of flow, think that the radial force of determining the prototype maximum is as important references in minimum.
Claims (1)
1. water pump waterpower model test apparatus, it is characterized in that: testing apparatus is horizontal, by inlet segment (1), the pump housing (2), impeller (3), impeller nut (4) ball bearing (5), stator (6), impeller chimney (7), pump shaft (8), mechanical seal (9), double-row angular contact ball bearing (10), bearing suspension (11), bearing bracket (12), radially cantilever forcemeter (13) and axially proving ring (14) composition, the pump housing (2) is the annular pumping chamber structure, impeller chimney (7) is positioned at the pump housing (2) annular pumping chamber entrance, impeller chimney (7) is fixed by inlet segment (1), impeller (3) is installed in an end of pump shaft (8) and locks with impeller nut (4), impeller (3) is positioned at impeller chimney (7), be set with successively fixedly ball bearing (5) and radially forcemeter (13) on impeller (3) the rear portion pump shaft (8), stator (6) exports near impeller (3), as the transition apparatus between impeller (3) and the pump housing (2) annular pumping chamber, pump shaft (8) stage casing placement of mechanical seal ring (9), bearing suspension (11) is connected with the pump housing (2), bearing suspension (11) is supported by the bearing bracket (12) of pump shaft (8) the other end, in the bearing suspension (11) of corresponding bearing bracket (12) Support Position double-row angular contact ball bearing (10) is set, bearing both sides disposed axle to proving ring (14) with the test axial force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220425787 CN202707521U (en) | 2012-08-27 | 2012-08-27 | Pump hydraulic model testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220425787 CN202707521U (en) | 2012-08-27 | 2012-08-27 | Pump hydraulic model testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202707521U true CN202707521U (en) | 2013-01-30 |
Family
ID=47587828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220425787 Withdrawn - After Issue CN202707521U (en) | 2012-08-27 | 2012-08-27 | Pump hydraulic model testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202707521U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808784A (en) * | 2012-08-27 | 2012-12-05 | 哈尔滨电气动力装备有限公司 | Hydraulic model testing device for water pump |
| CN104454564A (en) * | 2014-11-10 | 2015-03-25 | 扬州大学 | Axial flow pump device guide vane body hydraulic optimization method based on tests |
| CN106197808A (en) * | 2016-08-16 | 2016-12-07 | 中国航空工业集团公司沈阳发动机设计研究所 | The location of a kind of rotor without thrust bearing and axial-force testing 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 |
| CN112814916A (en) * | 2021-03-09 | 2021-05-18 | 合肥华升泵阀股份有限公司 | Horizontal test model pump of axial-flow pump |
-
2012
- 2012-08-27 CN CN 201220425787 patent/CN202707521U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808784A (en) * | 2012-08-27 | 2012-12-05 | 哈尔滨电气动力装备有限公司 | Hydraulic model testing device for water pump |
| CN102808784B (en) * | 2012-08-27 | 2015-06-17 | 哈尔滨电气动力装备有限公司 | Hydraulic model testing device for water pump |
| CN104454564A (en) * | 2014-11-10 | 2015-03-25 | 扬州大学 | Axial flow pump device guide vane body hydraulic optimization method based on tests |
| CN106197808A (en) * | 2016-08-16 | 2016-12-07 | 中国航空工业集团公司沈阳发动机设计研究所 | The location of a kind of rotor without thrust bearing and axial-force testing device |
| CN106197808B (en) * | 2016-08-16 | 2019-01-18 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of positioning of no thrust bearing rotor and axial-force testing 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 |
| CN112814916A (en) * | 2021-03-09 | 2021-05-18 | 合肥华升泵阀股份有限公司 | Horizontal test model pump of axial-flow pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202707521U (en) | Pump hydraulic model testing device | |
| CN102589894B (en) | Micro gas compressor/turbine combined test bed and test method | |
| Van Esch | Performance and radial loading of a mixed-flow pump under non-uniform suction flow | |
| Yassi | Improvement of the efficiency of the Agnew micro hydro turbine at part loads due to installing guide vanes mechanism | |
| CN108593229B (en) | Integral impeller blade vibration measurement device and measurement method | |
| CN102808784B (en) | Hydraulic model testing device for water pump | |
| Franz | Experimental investigation of the effect of cavitation on the rotordynamic forces on a whirling centrifugal pump impeller | |
| Lou et al. | Development of a centrifugal compressor facility for performance and aeromechanics research | |
| Franz et al. | The rotordynamic forces on a centrifugal pump impeller in the presence of cavitation | |
| CN103512685B (en) | Sealing force testing device used for studying damping seal prerotation effect | |
| CN109114011B (en) | A kind of reactor coolant pump hydraulic model integrated experiment device | |
| Allmark et al. | The development and testing of a lab-scale tidal stream turbine for the study of dynamic device loading | |
| CN108119287A (en) | A kind of performance test experiment table of rotary wheel of water turbine | |
| Dodsworth et al. | Operational parametric study of a Tesla pump: Disk pack spacing and rotational speed | |
| Sivasailam et al. | Pressure fluctuation study in the stages of a multistage pump at best efficiency points under various operating speeds | |
| CN106907336B (en) | A kind of mixed-flow pump impeller instantaneous radial measuring device and method | |
| Torre et al. | Continuous spectrum of the rotordynamic forces on a four bladed inducer | |
| CN111767873B (en) | Method for discriminating superposition vibration frequency of flow field of movable guide vane of water turbine | |
| CN104296909A (en) | Power recovery type efficiency testing device for hydraulic wind-driven generator | |
| CN110275111B (en) | High-speed test system of ultra-high-speed alternating-current generator and control method thereof | |
| Li et al. | Blade interaction forces in a mixed-flow pump with vaned diffuser | |
| CN107609260B (en) | High-parameter vertical pump impeller axial and radial water thrust load similar conversion method | |
| CN202628537U (en) | Horizontal supercharging water injection pump driven by water power turbine | |
| Pasini et al. | Characterization of the rotordynamic forces on tapered axial inducers by means of a rotating dynamometer and high-speed movies | |
| Langleite et al. | Test of a Francis turbine with variable speed operation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130130 Effective date of abandoning: 20150617 |
|
| RGAV | Abandon patent right to avoid regrant |