CN204344481U - Axial-flow pump device diffuser average exit speed circular rector affects the model test apparatus of outlet passage hydraulic performance - Google Patents
Axial-flow pump device diffuser average exit speed circular rector affects the model test apparatus of outlet passage hydraulic performance Download PDFInfo
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- CN204344481U CN204344481U CN201420666385.0U CN201420666385U CN204344481U CN 204344481 U CN204344481 U CN 204344481U CN 201420666385 U CN201420666385 U CN 201420666385U CN 204344481 U CN204344481 U CN 204344481U
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Abstract
Axial-flow pump device diffuser average exit speed circular rector affects the model test apparatus of outlet passage hydraulic performance, belongs to hydraulic machinery technical field.Connected and composed successively by pipeline by model pump, diffuser, mean velocity circular rector meter, outlet passage, water outlet pool, gate valve, service pump, flowmeter, the tube wall connecting outlet passage import is provided with import pressure tap, outlet passage import pressure-measuring pipe is installed and is connected on import pressure tap, the sidewall of water outlet pool is provided with outlet pressure tap, and outlet passage outlet pressure-measuring pipe is installed and is connected on outlet pressure tap.Current flow out from the impeller of model pump, flow through diffuser, mean velocity circular rector meter, outlet passage import pressure tap, outlet passage, water outlet pool, outlet passage outlet pressure tap, gate valve, service pump, flowmeter successively, finally return described model pump import and form a circulatory system.The rule that diffuser outlet stream circular rector in axial-flow pump device affects outlet passage hydraulic performance can be furtherd investigate by the utility model.
Description
Technical field
the utility model relates to the model test apparatus that axial-flow pump device diffuser average exit speed circular rector affects outlet passage hydraulic performance, belongs to hydraulic machinery technical field.
Background technique
large Scale Axial-flow Pump Unit is widely used in China plains region, has played very important effect in fields such as drought resisting water drainage, Water Resource Adjustment & Distribution and water environment improvement.Axial-flow pump device is made up of, wherein, before water inlet flow channel is positioned at impeller, after diffuser is positioned at impeller, after outlet passage is positioned at diffuser the impeller of water inlet flow channel, outlet passage and axial-flow pump, diffuser.Current obtain energy under the effect of the axial-flow pump impeller of High Rotation Speed, and the current of diffuser outlet simultaneously also have very large velocity circulation.Conventional axial-flow pump design is not for concrete axial-flow pump device, and the target of diffuser the Hydraulic Design is that adjustment flows into the direction of diffuser current from impeller, eliminates the velocity circulation of diffuser outlet stream.Research in recent years finds, in axial-flow pump device, the impact of velocity circulation on fluidised form in outlet passage and loss of head of diffuser outlet stream is not that circular rector is better less, but there is the optimum circular rector making outlet passage loss of head minimum.Therefore, the conventional design method of diffuser causes it not mate with the hydraulic performance of outlet passage, increases the loss of head of outlet passage.The impact of outlet passage loss of head on axial-flow pump device efficiency is very large, and particularly for the large-scale low-lift-head pumping station that year service hours are long, this impact more must to pay attention to.
Model utility content
the purpose of this utility model is exactly for above-mentioned existing defect, provides a kind of axial-flow pump device diffuser average exit speed circular rector to affect the model test apparatus of outlet passage hydraulic performance.Reach optimum circular rector for target with the average exit speed circular rector of axial-flow pump device diffuser and carry out diffuser optimal design, make itself and outlet passage reach best fit, realize the optimization of axial-flow pump device hydraulic performance.
the purpose of this utility model is achieved through the following technical solutions: axial-flow pump device diffuser average exit speed circular rector affects the model test apparatus of outlet passage hydraulic performance, it is characterized in that, be provided with model pump, diffuser, mean velocity circular rector meter, outlet passage, water outlet pool, gate valve, service pump, flowmeter and pipeline, model pump, diffuser, mean velocity circular rector meter, outlet passage, water outlet pool, gate valve, service pump, flowmeter connects and composes a circulatory system successively by pipeline, the tube wall of outlet passage import is provided with the import pressure tap of outlet passage import pressure-measuring pipe, the installation of outlet passage import pressure-measuring pipe is connected on the import pressure tap on tube wall, the water outlet pool sidewall of outlet passage outlet is provided with the outlet pressure tap connecting outlet passage outlet pressure-measuring pipe, the installation of outlet passage outlet pressure-measuring pipe is connected on the outlet pressure tap on water outlet pool sidewall, current flow out from the impeller of model pump, flow through diffuser, mean velocity circular rector meter, outlet passage import pressure tap, outlet passage, water outlet pool, outlet passage outlet pressure tap, gate valve, service pump, flowmeter successively, finally return described model pump import.
described mean velocity circular rector meter is provided with circular rector meter wheel hub, circular rector meter shaft, prismatic blade, metal reflective sheet, photoelectric sensor, counter, circular rector meter wheel hub, prismatic blade are mounted in described pipeline by circular rector meter shaft, metal reflective sheet is arranged on straight-vaned side, photoelectric sensor to be arranged on described pipeline and linkage counter, the termination of photoelectric sensor through inner-walls of duct towards the described metal reflective sheet in duct chamber.
described model pump is similar to the archetypal pump in described axial-flow pump device, for providing the current similar to prototype axial-flow pump device in testing apparatus.
described diffuser is provided with 7 groups of diffusers be for experiment.
the duct length be connected between the import of described outlet passage and the outlet of diffuser is 8 times of model pump impeller diameter, the distance of outlet passage import pressure-measuring pipe distance outlet passage import is 3 times of model pump impeller diameter, and the distance of the outlet distance outlet passage outlet pressure-measuring pipe of outlet passage is 8 times of model pump impeller diameter.
described gate valve is butterfly valve, for regulating the operating mode of described model pump.
described service pump is pipeline mounted pump, overcomes pipe resistance for helping described model pump.
described flow counts electromagnetic flowmeter, for measuring the flow of described model pump.
the utility model design science is reasonable, axial pump vane body average exit speed circular rector through the utility model hydraulic optimization reaches optimum circular rector, it can be made to reach optimum Match with the outlet passage hydraulic performance in the axial-flow pump device applied, further raising axial-flow pump device hydraulic performance, solve existing axial pump vane body the Hydraulic Design not for applied axial-flow pump device, to eliminate average exit speed circular rector completely for target, designed diffuser does not mate with the outlet passage hydraulic performance in axial-flow pump device, the problem of axial-flow pump device hydraulic performance difference.The utility model is applicable to the diffuser hydraulic optimization in the axial-flow pump device be made up of different model axial-flow pump and different types outlet passage, can further investigate the rule that diffuser outlet stream circular rector in axial-flow pump device affects outlet passage hydraulic performance.
Accompanying drawing explanation
fig. 1 is model test apparatus schematic diagram of the present utility model.
fig. 2 a is the schematic diagram of battery of tests diffuser of the present utility model.
fig. 2 b is the schematic diagram of second group of test diffuser of the present utility model.
fig. 2 c is the schematic diagram of the 3rd group of test diffuser of the present utility model.
fig. 2 d is the schematic diagram of the 4th group of test diffuser of the present utility model.
fig. 2 e is the schematic diagram of the 5th group of test diffuser of the present utility model.
fig. 2 f is the schematic diagram of the 6th group of test diffuser of the present utility model.
fig. 2 g is the schematic diagram of the 7th group of test diffuser of the present utility model.
fig. 3 is the utility model mean velocity circular rector meter schematic diagram.
fig. 4 is the axial-flow pump device diffuser schematic diagram through the utility model test with optimum average exit speed circular rector.
in figure: 1 model pump, 2 diffusers, 3 mean velocity circular rector meters, 4 import pressure taps, 5 outlet passages, 6 water outlet pooies, 7 outlet pressure taps, 8 gate valves, 9 service pumps, 10 flowmeters, 11 pipelines, 12 circular rector meter wheel hubs, 13 circular rector meter shafts, 14 prismatic blades, 15 inner-walls of duct, 16 metal reflective sheets, 17 photoelectric sensors, 18 counters, 19 guide vanes, 20 small leaf, 21 small leaf, 22 small leaf, 23 small leaf, 24 small leaf, 25 small leaf, 26 small leaf, 27 guide bearing bearings.
Embodiment
below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail.
as shown in Figure 1, axial-flow pump device diffuser average exit speed circular rector affects the model test apparatus of outlet passage hydraulic performance, by model pump 1, diffuser 2, mean velocity circular rector meter 3, outlet passage 5, water outlet pool 6, gate valve 8, service pump 9, flowmeter 10 is connected and composed successively by pipeline, pipeline 11 wall of outlet passage 5 import is provided with the import pressure tap 4 of outlet passage import pressure-measuring pipe, the installation of outlet passage import pressure-measuring pipe is connected on the import pressure tap 4 on tube wall, the sidewall of the water outlet pool 6 that outlet passage 5 exports is provided with the outlet pressure tap 7 connecting outlet passage outlet pressure-measuring pipe, the installation of outlet passage outlet pressure-measuring pipe is connected on the outlet pressure tap 7 on the sidewall of water outlet pool 6.
current flow out from the impeller of model pump 1, flow through diffuser 2, mean velocity circular rector meter 3, outlet passage import pressure tap 4, outlet passage 5, water outlet pool 6, outlet passage outlet pressure tap 7, gate valve 8, service pump 9, flowmeter 10 successively, finally return described model pump 1, form a circulatory system; Model pump 1 is similar to the archetypal pump in described axial-flow pump device, for providing the current similar to prototype axial-flow pump device in testing apparatus; Diffuser 2 is exported and is connected with outlet passage 5 import by pipeline 11, and the length of pipeline 11 is 8
d(
dfor the impeller diameter of model pump 1, unit is m, lower same); Mean velocity circular rector meter 3 is arranged on and exports in the pipeline 11 be connected with diffuser 2, for measuring the current mean velocity circular rector that diffuser 2 exports; Outlet passage 5 is the siphon outlet conduit in described axial-flow pump device; Outlet passage import pressure tap 4 is arranged on pipeline 11, apart from the import 3 of outlet passage 5
ddistance; Outlet passage outlet pressure tap 7 is arranged on the sidewall of water outlet pool 6, exports 8 apart from outlet passage 5
ddistance; Gate valve 8 is butterfly valve, for regulating the operating mode of model pump 1; Service pump 9 is pipeline mounted pump, overcomes pipe resistance for helping model pump 1; Flowmeter 10 is electromagnetic flowmeter, for the flow of measurement model pump 1.
(2) described model pump 1 first wife diffuser has 5 blades, and design and produce one group of diffuser that 7 schemes are for experiment, their outline overall and installing dimensions is identical, as shown in Fig. 2 a ~ Fig. 2 g, changes successively in test; The geometric properties of 7 scheme diffusers is that guide vane is 5, but the length of blade of each scheme diffuser and exit angle progressively increase successively;
diffuser scheme 1 as shown in Figure 2 a, its geometric properties is, the sheet number of guide vane 19 is identical with the number of blade of first wife's diffuser of model pump 1, the entrance angle of guide vane 19 is identical with model pump 1 first wife diffuser vane inlet angle, it is 50.8 °, this angle is consistent with the direction of model pump 1 impeller blade outlet stream speed, and the length of guide vane 19 is taken as 0.2
d, make it meet the requirement of bolster model pump 1 guide bearing bearing 27; The angle of guide vane 19 remains unchanged from import to outlet, do not play corrective action, therefore its outlet is equal with the velocity circulation of import to the flow direction flowing into diffuser current;
as shown in Figure 2 b, its geometric properties is diffuser scheme 2, on the basis of diffuser scheme 1, is 0.05 in each increase of the outlet of each guide vane 19 1 length
dsmall leaf 20, and make small leaf 20 deflect 10 ° to stator body axis direction on the basis of guide vane 19 exit angle, the circumferential flow velocity of diffuser scheme 2 outlet stream is subject to the adjustment of small leaf 20 and reduces, thus correspondingly makes the velocity circulation of its outlet stream reduce on the basis of diffuser scheme 1;
as shown in Figure 2 c, its geometric properties is diffuser scheme 3, on the basis of diffuser scheme 2, is 0.05 in each increase of the outlet of each small leaf 20 1 length
dsmall leaf 21, and make small leaf 21 deflect 10 ° to stator body axis direction on the basis of small leaf 20 exit angle, the circumferential flow velocity of diffuser scheme 3 outlet stream is subject to the adjustment of small leaf 21 and again reduces, thus correspondingly makes the velocity circulation of its outlet stream reduce on the basis of diffuser scheme 2;
as shown in Figure 2 d, its geometric properties is diffuser scheme 4, on the basis of diffuser scheme 3, is 0.05 in each increase of the outlet of each small leaf 21 1 length
dsmall leaf 22, and make small leaf 22 deflect 10 ° to stator body axis direction on the basis of small leaf 21 exit angle, the circumferential flow velocity of diffuser scheme 4 outlet stream is subject to the adjustment of small leaf 22 and reduces again, thus correspondingly makes the velocity circulation of its outlet stream reduce on the basis of diffuser scheme 3;
as shown in Figure 2 e, its geometric properties is diffuser scheme 5, on the basis of diffuser scheme 4, is 0.05 in each increase of the outlet of each small leaf 22 1 length
dsmall leaf 23, and make small leaf 23 deflect 9.2 ° to stator body axis direction on the basis of small leaf 22 exit angle, program guide vane exit angle reaches 90 ° (with diffuser axis being parallel), the circumferential flow velocity of diffuser scheme 5 outlet stream is subject to the further adjustment of small leaf 23 and reduces, thus correspondingly makes the velocity circulation of its outlet stream reduce on the basis of diffuser scheme 4;
as shown in figure 2f, its geometric properties is diffuser scheme 6, on the basis of diffuser scheme 5, is 0.05 in each increase of the outlet of each small leaf 23 1 length
dsmall leaf 24, and make small leaf 24 exit angle remain 90 °, because program guide vane adds certain length along diffuser axial direction on the basis of diffuser scheme 5, the circumferential flow velocity of diffuser scheme 6 outlet stream is subject to the continuation adjustment of small leaf 24 and reduces, thus correspondingly makes the velocity circulation of its outlet stream reduce on the basis of diffuser scheme 5;
as shown in Figure 2 g, its geometric properties is diffuser scheme 7, on the basis of diffuser scheme 6, is 0.05 in each increase of the outlet of each small leaf 24 1 length
dsmall leaf 25, and make small leaf 25 exit angle continue to remain 90 °, because program guide vane adds certain length along diffuser axial direction on the basis of diffuser scheme 6, the circumferential flow velocity of diffuser scheme 7 outlet stream is subject to the lasting adjustment of small leaf 25 and reduces, thus correspondingly makes the velocity circulation of its outlet stream reduce on the basis of diffuser scheme 6.
(3) described mean velocity circular rector meter 3 is made up of circular rector meter wheel hub 12, circular rector meter shaft 13 and 4 prismatic blades 14 along the even cloth of circular rector meter wheel hub 12, as shown in Figure 3, the axis of described circular rector meter shaft 13 is consistent with the axis of model pump 1, the diameter of described circular rector meter wheel hub 12 is identical with the hub body diameter of diffuser 2 Outlet Section, described prismatic blade 14 edge is 2mm to the distance of inner-walls of duct 15, the length of prismatic blade 14 is 0.6 times of pipeline 11 diameter, under the effect of diffuser 2 outlet stream circumference flow velocity, prismatic blade 14 rotates in company with current, finally reach and diffuser 2 outlet stream synchronous rotary, the rotational speed of prismatic blade 14 is the average rotational speed of diffuser 2 outlet stream, in the side metal clad retroreflective sheet 16 of prismatic blade 14, position corresponding with metal reflective sheet 16 on pipeline 11 arranges photoelectric sensor 17, its head flushes with the inwall 15 of described pipeline 11, photoelectric sensor 17 sends light beam, prismatic blade 14 often revolves and turns around under flow action, retroreflective sheet 16 on 4 prismatic blades each reflective 1 time to this light beam, photoelectric sensor 17 receives 4 light pulse signals, these Signal transmissions are to the counter 18 be connected with photoelectric sensor 17, in counter 18 unit time, the pulse sum of record can obtain the number of turns of described circular rector meter prismatic blade 14 rotation per minute divided by 4.
(4) model test that axial-flow pump device diffuser 2 average exit speed circular rector affects outlet passage 5 hydraulic performance is carried out, the diffuser of each test replacing different schemes, the physical quantity of testing is needed to comprise in test: the number of turns of described circular rector meter prismatic blade 14 rotation per minute, the static pressure of outlet passage import pressure tap 4, the outlet passage outlet static pressure of pressure tap 7 and the flow of model pump 1, according to the mean velocity circular rector of test result calculations diffuser 2 outlet stream and the loss of head of corresponding outlet passage 5, the relation curve between the mean velocity circular rector of diffuser 2 outlet stream and the loss of head of corresponding outlet passage 5 is drawn according to result of calculation, thus carry out diffuser optimal design, itself and outlet passage is made to reach best fit, realize the optimization of axial-flow pump device hydraulic performance.
Claims (8)
1. axial-flow pump device diffuser average exit speed circular rector affects the model test apparatus of outlet passage hydraulic performance, it is characterized in that, be provided with model pump, diffuser, mean velocity circular rector meter, outlet passage, water outlet pool, gate valve, service pump, flowmeter and pipeline, model pump, diffuser, mean velocity circular rector meter, outlet passage, water outlet pool, gate valve, service pump, flowmeter connects and composes a circulatory system successively by pipeline, the tube wall connecting outlet passage import is provided with the import pressure tap of outlet passage import pressure-measuring pipe, the installation of outlet passage import pressure-measuring pipe is connected on the import pressure tap on tube wall, the water outlet pool sidewall connecting outlet passage outlet is provided with the outlet pressure tap connecting outlet passage outlet pressure-measuring pipe, the installation of outlet passage outlet pressure-measuring pipe is connected on the outlet pressure tap on water outlet pool sidewall, current flow out from the impeller of model pump, flow through diffuser, mean velocity circular rector meter, outlet passage import pressure tap, outlet passage, water outlet pool, outlet passage outlet pressure tap, gate valve, service pump, flowmeter successively, finally return described model pump import.
2. axial-flow pump device diffuser average exit speed circular rector according to claim 1 affects the model test apparatus of outlet passage hydraulic performance, it is characterized in that, described mean velocity circular rector meter is provided with circular rector meter wheel hub, circular rector meter shaft, prismatic blade, metal reflective sheet, photoelectric sensor, counter, circular rector meter wheel hub, prismatic blade is mounted in described pipeline by circular rector meter shaft, metal reflective sheet is arranged on straight-vaned side, photoelectric sensor to be arranged on described pipeline and linkage counter, inner-walls of duct is passed towards the described metal reflective sheet in duct chamber in the termination of photoelectric sensor.
3. axial-flow pump device diffuser average exit speed circular rector according to claim 1 affects the model test apparatus of outlet passage hydraulic performance, it is characterized in that, described model pump is similar to the archetypal pump in described axial-flow pump device, for providing the current similar to prototype axial-flow pump device in testing apparatus.
4. axial-flow pump device diffuser average exit speed circular rector according to claim 1 affects the model test apparatus of outlet passage hydraulic performance, and it is characterized in that, described diffuser is provided with 7 groups of diffusers be for experiment.
5. axial-flow pump device diffuser average exit speed circular rector according to claim 1 affects the model test apparatus of outlet passage hydraulic performance, it is characterized in that, the duct length be connected between the import of described outlet passage and the outlet of diffuser is 8 times of model pump impeller diameter, the distance of outlet passage import pressure-measuring pipe distance outlet passage import is 3 times of model pump impeller diameter, and the distance of the outlet distance outlet passage outlet pressure-measuring pipe of outlet passage is 8 times of model pump impeller diameter.
6. axial-flow pump device diffuser average exit speed circular rector according to claim 1 affects the model test apparatus of outlet passage hydraulic performance, and it is characterized in that, described gate valve is butterfly valve, for regulating the operating mode of described model pump.
7. axial-flow pump device diffuser average exit speed circular rector according to claim 1 affects the model test apparatus of outlet passage hydraulic performance, and it is characterized in that, described service pump is pipeline mounted pump, overcomes pipe resistance for helping described model pump.
8. axial-flow pump device diffuser average exit speed circular rector according to claim 1 affects the model test apparatus of outlet passage hydraulic performance, and it is characterized in that, described flow counts electromagnetic flowmeter, for measuring the flow of described model pump.
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| CN201420666385.0U CN204344481U (en) | 2014-11-10 | 2014-11-10 | Axial-flow pump device diffuser average exit speed circular rector affects the model test apparatus of outlet passage hydraulic performance |
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2014
- 2014-11-10 CN CN201420666385.0U patent/CN204344481U/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108223396A (en) * | 2017-12-11 | 2018-06-29 | 中国水利水电科学研究院 | A kind of high-precision water pump bath scaled model experimental device |
| CN108223396B (en) * | 2017-12-11 | 2024-04-26 | 中国水利水电科学研究院 | High-precision water pump model experimental device |
| CN109058128A (en) * | 2018-10-28 | 2018-12-21 | 扬州大学 | A kind of novel micro- lift revolution scraping blade pump performance test device |
| CN109058128B (en) * | 2018-10-28 | 2023-12-22 | 扬州大学 | Performance test device for micro-lift rotary scraping blade pump |
| CN113323859A (en) * | 2021-07-13 | 2021-08-31 | 上海阿波罗机械股份有限公司 | Test system for nuclear power circulating water pump water inlet runner test |
| CN116292420A (en) * | 2023-02-20 | 2023-06-23 | 扬州大学 | Bulb tubular pump device with sectional adjustable front guide vanes and method for improving water flow state by bulb tubular pump device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150520 Termination date: 20171110 |