CN102287398A - Small-sized high-speed centrifugal pump suitable for flow regulation in wide range - Google Patents
Small-sized high-speed centrifugal pump suitable for flow regulation in wide range Download PDFInfo
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- CN102287398A CN102287398A CN2011102090475A CN201110209047A CN102287398A CN 102287398 A CN102287398 A CN 102287398A CN 2011102090475 A CN2011102090475 A CN 2011102090475A CN 201110209047 A CN201110209047 A CN 201110209047A CN 102287398 A CN102287398 A CN 102287398A
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Abstract
The invention relates to a small-sized high-speed centrifugal pump suitable for flow regulation in a wide range. The centrifugal pump comprises a driving machine, a pump body, a shaft which is arranged in the pump body through bearings, a centrifugal wheel and an inducing wheel, wherein one end of the shaft is connected with the output end of the driving machine, and the other end of the shaft is provided with the centrifugal wheel and the inducing wheel sequentially; the inducing wheel comprises an inducing wheel hub and inducing wheel blades arranged on the inducing wheel hub; the diameter of the inducing wheel hub is gradually increased from an inlet of the inducing wheel to an outlet; and the pitch of the inducing wheel is gradually increased from the inlet of the inducing wheel to the outlet in a three-section mode, and the inducing wheel is provided with a constant pitch section, a varying pitch section and a constant pitch section sequentially along the axial direction. The technical problems that the centrifugal pump is limited by pump cavitation resistance and rotor dynamics problems in the prior art are solved. The centrifugal pump provided by the invention has the advantages of compact structure, small size, high performance and high cavitation resistance.
Description
Technical field
The present invention relates to a kind of centrifugal pump device, particularly a kind of small-sized high speed centrifugal pump that is applicable to the wide range Flow-rate adjustment can be used for the fuel supply system of pressed engine or aeroengine, also can be used for the liquid engine propellant feed system.
Background technique
Certain pressed engine adopts the pump pressure type oil supply system.Because the spatial domain and the Mach number excursion of missile flight are very big, so the Flow-rate adjustment of fuel pump surpasses 30 than (peak rate of flow/minimum discharge of pump); Because the body narrow space, fuel pump must accomplish that physical dimension is little, in light weight; The fuel pump inlet pressure is lower simultaneously, thereby requires fuel pump to have higher anti-cavitation performance.Adopt high rotating speed can reduce physical dimension and structure weight, but, improve the anti-cavitation performance that rotating speed will reduce pump, particularly under super wide range of flow, make each operating point all keep high-cavitation-resistance energy difficulty very big for fuel pump.
Ordinary Centrifugal Pumps can't adopt a high-revolving major reason to be to be subjected to the restriction of pump anti-cavitation performance; In addition, rotor dynamics problems such as can't to improve also be that the restriction centrifugal pump adopts high-revolving another major reason to critical speed of rotation.
Summary of the invention
Centrifugal pump is subjected to the restriction of pump anti-cavitation performance and the technical problem that rotor dynamics problems limits in the prior art in order to solve, and the invention provides the centrifugal pump device of a kind of compact structure, small size, high-performance, high-cavitation-resistance energy.
Technical solution of the present invention is:
A kind of small-sized high speed centrifugal pump that is applicable to the wide range Flow-rate adjustment, comprise driving machine, the pump housing, by bearing be arranged in the pump housing the axle, centrifugal wheel and inducer, the output terminal of described driving machine is connected with axle one end, the other end of axle is equipped with centrifugal wheel and inducer successively, its special way is: described inducer comprises the inducer wheel hub and is arranged on inducer blade on the inducer wheel hub, described inducer hub diameter is cumulative to outlet from the import of inducer, the pitch of described inducer is cumulative and be 3 stops to outlet from the import of inducer, is followed successively by the uniform pitch section vertically, variable pitch section and uniform pitch section.The inlet of above-mentioned inducer blade is a sweepback; The external diameter at inducer blade exit place be shrink shape and be contracted to the centrifugal wheel inlet.
Above-mentioned centrifugal wheel comprises a plurality of linear leafs and short blade, and described linear leaf and short blade be circumference uniform distribution at interval, and the interval angle of adjacent linear leaf is α, and the angle of short blade and adjacent linear leaf non-working surface is β,
β/α＜0.5。
Described centrifugal wheel blade has big import laying angle and big entrance width in inlet.
The number of blade of above-mentioned centrifugal wheel is 12, is made up of 6 linear leafs and 6 short blades, and linear leaf and short blade are the circular arc prismatic blade.
Also comprise being arranged at the but inner looping of bearing of the interior cooling of the pump housing, described inner looping one end opening is opened on liquid inlet of centrifugal pump in the bearing outside the other end.
Be provided with floating ring 5 between the above-mentioned pump housing 1 and the centrifugal wheel 3.
Owing to adopted technique scheme, the present invention to have the following advantages and effect:
1, anti-cavitation performance is good, and flow stability is good.The blade angle of Variable-pitch Inducers is cumulative from the import to the outlet, adopt little blade angle in inducer inlet, thereby inducer self has high anti-cavitation performance; Adopt big blade angle in the inducer outlet port, it is high-lift that inducer is obtained, thereby avoided pump impeller cavitation to occur; Inducer and outlet section at inducer are respectively kept one section uniform pitch section, have improved the stability that fluid flows, and have guaranteed that centrifugal wheel has good entry condition, and then have improved the anti-cavitation performance of pump;
2, centrifugal wheel adopts the composite impeller form, adopts bigger import laying angle and entrance width, outlet port to adopt the more number of blade in blade inlet, has reduced the excretion coefficient of centrifugal wheel inlet louver, has guaranteed that centrifugal wheel has high anti-cavitation performance.Under the situation of flow large-scope change, adopt Variable-pitch Inducers and centrifugal wheel to adopt composite impeller to guarantee that pump has good anti-cavitation performance.
3, compact structure: the external diameter of general inducer is greater than the inlet diameter of centrifugal wheel, the present invention is designed to shrink shape with the outer rim of inducer blade exit, and the inducer blade exit is contracted to the centrifugal wheel import, has reduced axial length, simplify the structure, the critical speed of rotation of pump is improved.Thereby improved the working speed of pump.
4, the loop with the bearing cooling liquid is arranged in the pump housing, has reduced the radial dimension of centrifugal pump, makes centrifugal pump device compact more.Adopt the float ring seal device, realized the nothing wearing and tearing of product under the high rotating speed, and had the self-aligning effect, simple and reliable for structure.
5. the rotating speed height, light weight, physical dimension is little: adopt certain pressed engine of this centrifugal pump to surpass 60000r/min with the high workload rotating speed of air turbine pump, physical dimension is Φ 100 * 180 (mm), quality is 4kg only, and has realized repeatedly starting, and is working properly.
6, efficient height: under identical centrifugal wheel external diameter, adopt the centrifugal wheel of combination of long drives and drop shots blade shape of the present invention and Variable-pitch Inducers to help improving lift of pump and efficient; Adopt the inducer hub diameter can reduce the backflow in inducer wheel hub outlet port to the cumulative form of outlet, thereby improve the stability that fluid flows, improved the matching of inducer and centrifugal wheel from import.Therefore adopt the centrifugal wheel and the Variable-pitch Inducers of the deviated splitter vane combination of short blade offset form, make pump obtain high efficiency.
7, flow adjustment range is super wide: because inducer adopts variable-pitch and variable wheel hub form, centrifugal wheel adopts the composite impeller form that strengthens import, thereby the negotiability of centrifugal pump under big flow is guaranteed, flow stability under the small flow also is improved simultaneously, and the flow adjustment range of pump is broadened.
Description of drawings
Fig. 1 is a centrifugal pump device sectional view of the present invention;
Fig. 2 is a centrifugal wheel blade schematic representation of the present invention;
Fig. 3 is an inducer sectional view of the present invention;
Fig. 4 is an inducer pitch Changing Pattern schematic representation of the present invention, and wherein: abscissa is the blade axial length, and y coordinate is a pitch;
Fig. 5 is inducer of the present invention and centrifugal wheel coupling schematic representation;
Wherein: the 1-pump housing, 2-axle, 3-centrifugal wheel, 31-linear leaf, 32-short blade, 4-inducer, 41-inducer wheel hub, 42-inducer blade, 5-floating ring, 6, the 7-bearing, 8-inner looping, 33-working surface, 34-non-working surface.
Fig. 6 is a pumping head characteristic curve of the present invention, and wherein: abscissa is a relative discharge, and y coordinate is a head coefficient;
Fig. 7 is a pump efficiency characteristic curve of the present invention, and wherein: abscissa is a relative discharge, and y coordinate is an efficient;
Fig. 8 is a mercury vapour erosion characteristic curve of the present invention.
Embodiment
Fig. 1 is a kind of schematic representation that is applicable to the centrifugal pump device of wide range Flow-rate adjustment, comprises the pump housing 1, is arranged at the pump housing interior axle, centrifugal wheel and inducer by bearing (6,7), and pump housing front end is provided with liquid entering hole, and the side is provided with liquid outlet.Axle is connected with the pump housing by bearing, and centrifugal wheel and inducer are installed on an end of axle successively, be connected by key and axle, and rotation together.The other end of axle is equipped with driving machine (motor or turbine), by axle the power of driving machine is passed to centrifugal wheel and inducer, realizes the lifting to medium (fuel oil) pressure.This device has the characteristics of compact structure, high design speed, high-performance, high-cavitation-resistance energy.
Above-mentioned centrifugal pump also comprises the but inner looping of bearing of the cooling that is arranged in the pump housing, and the one end opening is in the outside of bearing, and the other end is opened on liquid entering hole.
As shown in Figure 2, be centrifugal wheel 3 of the present invention.The number of blade of centrifugal wheel 3 is 12, is made up of 6 linear leafs and 6 short blades, and blade is the circular arc prismatic blade.The centrifugal wheel of centrifugal pump is the composite impeller form of deviated splitter vane combination, and to be arranged in linear leaf center different with the short blade of routine, and the interval angle of adjacent linear leaf is α, and the angle of short blade and adjacent linear leaf non-working surface is β, satisfies beta/alpha＜0.5.
The characteristics of this centrifugal wheel 3 are the non-working surface biasing (in Fig. 2, beta/alpha＜0.5) of short blade 32 to linear leaf 31.Place linear leaf 31 centers (beta/alpha=0.5) to compare with short blade 32, short blade 32 biasings help reducing the separation of flow in centrifugal wheel 3 outlet ports, and then improve the efficient of centrifugal pump.Inducer 4 adopts and becomes wheel hub, variable pitch form.
As shown in Figure 3, the effect of inducer 4 is to guarantee not take place in the pump under low inlet pressure cavitation.The characteristics of inducer 4 are: wheel hub 41 diameters of inducer 4 are cumulative from the import to the outlet, and the pitch of inducer 4 is cumulative from the import to the outlet, and inducer blade 42 numbers are 2.Inducer adopts change wheel hub, variable pitch form to help improving the anti-cavitation performance of centrifugal pump.The hub diameter of inducer is cumulative from the import to the outlet in the centrifugal pump, and the pitch of inducer also is cumulative from import to outlet, and promptly inducer is to become wheel hub variable pitch form; The external diameter in inducer outlet port is to shrink shape, to mate with impeller better.
Fig. 4 is an inducer pitch Changing Pattern schematic representation, and the inducer of inducer is uniform pitch section (pitch is S1), and the intermediate portion of inducer is variable pitch section (pitch is cumulative to S2 by S1), and the outlet section of inducer also is uniform pitch section (pitch is S2).
As Fig. 3 and shown in Figure 5, another characteristics of inducer 4 are: the external diameter of inducer 4 is to shrink shape in the outlet port, inducer 4 slips in centrifugal wheel 3 front shrouds, this structure has been improved the matching relationship between inducer 4 outlets and centrifugal wheel 3 imports, help reducing the axial length of pump, make more compact structure.
As shown in Figure 4, between the pump housing 1 and centrifugal wheel 3, be furnished with the floating ring 5 of seal action.The advantage of float ring seal is not have wearing and tearing, reliability height.Under high rotating speed, floating ring 5 also has the self-aligning effect, and this is the advantage that other sealing means does not have.
Test shows: as Fig. 6-shown in Figure 8, this fuel pump can be realized rotating speed by 40000r/min to 60000r/min, and flow is regulated by the steady and continuous between the 0.03Q to 1.2Q.Under the so wide situation of range of flow, it is high-lift that fuel pump has all kept, and head curve is smooth, and head coefficient has satisfied usage requirement between 0.56～0.63; The pump peak efficiency is about 62.7%, and efficient increases along with the increase of flow.From the cavitation characteristics curve: pump anti-cavitation performance under 0.03Q～1.2Q scope is higher, has satisfied the anti-cavitation demand of pump.
Claims (6)
1. small-sized high speed centrifugal pump that is applicable to the wide range Flow-rate adjustment, comprise driving machine, the pump housing, be arranged at axle, centrifugal wheel and inducer in the pump housing by bearing, the output terminal of described driving machine is connected with axle one end, the other end of axle is equipped with centrifugal wheel and inducer successively, it is characterized in that:
Described inducer comprises the inducer wheel hub and is arranged on inducer blade on the inducer wheel hub, described inducer hub diameter is cumulative to outlet from the import of inducer, the pitch of described inducer is cumulative and be 3 stops to outlet from the import of inducer, is followed successively by uniform pitch section, variable pitch section and uniform pitch section vertically.
2. the small-sized high speed centrifugal pump that is applicable to the wide range Flow-rate adjustment according to claim 1 is characterized in that:
The inlet of described inducer blade is a sweepback; The external diameter at inducer blade exit place be shrink shape and be contracted to the centrifugal wheel inlet.
3. the small-sized high speed centrifugal pump that is applicable to the wide range Flow-rate adjustment according to claim 2 is characterized in that:
Described centrifugal wheel comprises a plurality of linear leafs and short blade, and described linear leaf and short blade be circumference uniform distribution at interval, and the interval angle of adjacent linear leaf is α, and the angle of short blade and adjacent linear leaf non-working surface is β,
β/α＜0.5。
Described centrifugal wheel blade has big import laying angle and big entrance width in inlet.
4. the small-sized high speed centrifugal pump that is applicable to the wide range Flow-rate adjustment according to claim 3 is characterized in that: the number of blade of described centrifugal wheel is 12, is made up of 6 linear leafs and 6 short blades, and linear leaf and short blade are the circular arc prismatic blade.
5. according to claim 1 or 2 or the 3 or 4 described small-sized high speed centrifugal pumps that are applicable to the wide range Flow-rate adjustment, it is characterized in that: also comprise being arranged at the but inner looping of bearing of the interior cooling of the pump housing, described inner looping one end opening is opened on liquid inlet of centrifugal pump in the bearing outside the other end.
6. the small-sized high speed centrifugal pump that is applicable to the wide range Flow-rate adjustment according to claim 5 is characterized in that: be provided with floating ring (5) between the described pump housing (1) and the centrifugal wheel (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110209047 CN102287398B (en) | 2011-07-25 | 2011-07-25 | Small-sized high-speed centrifugal pump suitable for flow regulation in wide range |
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| CN 201110209047 CN102287398B (en) | 2011-07-25 | 2011-07-25 | Small-sized high-speed centrifugal pump suitable for flow regulation in wide range |
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| CN102287398A true CN102287398A (en) | 2011-12-21 |
| CN102287398B CN102287398B (en) | 2013-04-24 |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321968A (en) * | 2013-07-12 | 2013-09-25 | 兰州理工大学 | High-speed pump provided with front-arranged inducer |
| CN105545797A (en) * | 2015-12-29 | 2016-05-04 | 西安航天动力研究所 | Integrated impeller with high cavitation resisting performance |
| CN105545379A (en) * | 2015-12-09 | 2016-05-04 | 西安航天动力研究所 | Connection structure among inducing wheel, centrifugal wheel and rotor |
| CN107143520A (en) * | 2017-07-13 | 2017-09-08 | 新兴际华科技装备有限公司 | A kind of voltage stabilizing centrifugal pump |
| CN108150449A (en) * | 2018-01-09 | 2018-06-12 | 兰州理工大学 | A kind of novel inducer |
| CN108414205A (en) * | 2018-04-23 | 2018-08-17 | 浙江理工大学 | Adjustable experimental provision for studying inducer axial distance |
| CN109812452A (en) * | 2019-03-11 | 2019-05-28 | 西安航天动力研究所 | A kind of high-cavitation-resistance can induce wheel |
| CN110469542A (en) * | 2019-08-16 | 2019-11-19 | 中国航发北京航科发动机控制系统科技有限公司 | A kind of fuel inlet device improving centrifugal pump suction capacity |
| CN111765117A (en) * | 2020-06-29 | 2020-10-13 | 浙江理工大学 | Inducer for high-speed centrifugal pump and working method of inducer |
| CN112302993A (en) * | 2020-11-25 | 2021-02-02 | 江苏大学 | Centrifugal pump impeller with offset wing type short blades |
| CN112412870A (en) * | 2020-10-30 | 2021-02-26 | 中国航发西安动力控制科技有限公司 | Booster pump impeller |
| CN112412815A (en) * | 2020-10-30 | 2021-02-26 | 中国航发西安动力控制科技有限公司 | Fuel oil supercharging device integrated with oil return path |
| CN112855607A (en) * | 2021-01-18 | 2021-05-28 | 江苏大学 | Centrifugal pump impeller with a plurality of short blades |
| CN113376397A (en) * | 2021-04-30 | 2021-09-10 | 北京航天动力研究所 | Ultrahigh rotating speed measuring device and method for ultralow temperature liquid hydrogen pump |
| CN113623264A (en) * | 2021-08-16 | 2021-11-09 | 江苏大学 | Experimental device for can be used to inducer gas-liquid two-phase visual test |
| CN114396383A (en) * | 2022-01-10 | 2022-04-26 | 成都凯天电子股份有限公司 | Oil-gas mixed transportation system |
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| CN2265446Y (en) * | 1996-02-07 | 1997-10-22 | 浙江大学 | High-speed composite impeller centrifugal pump |
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| CN201650857U (en) * | 2010-04-22 | 2010-11-24 | 大连帝国屏蔽电泵有限公司 | Inducer used for low-cavitation shielding electric pump |
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| CN86204176U (en) * | 1986-06-16 | 1987-06-10 | 中国石化销售公司山西省石油公司 | Multistage horizontal centrifugal pump with induced wheel |
| CN2265446Y (en) * | 1996-02-07 | 1997-10-22 | 浙江大学 | High-speed composite impeller centrifugal pump |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321968B (en) * | 2013-07-12 | 2016-02-17 | 兰州理工大学 | A kind of high speed pump with preposition inducer |
| CN103321968A (en) * | 2013-07-12 | 2013-09-25 | 兰州理工大学 | High-speed pump provided with front-arranged inducer |
| CN105545379A (en) * | 2015-12-09 | 2016-05-04 | 西安航天动力研究所 | Connection structure among inducing wheel, centrifugal wheel and rotor |
| CN105545797A (en) * | 2015-12-29 | 2016-05-04 | 西安航天动力研究所 | Integrated impeller with high cavitation resisting performance |
| CN107143520A (en) * | 2017-07-13 | 2017-09-08 | 新兴际华科技装备有限公司 | A kind of voltage stabilizing centrifugal pump |
| CN108150449A (en) * | 2018-01-09 | 2018-06-12 | 兰州理工大学 | A kind of novel inducer |
| CN108414205B (en) * | 2018-04-23 | 2023-10-17 | 浙江理工大学 | Adjustable experimental device for researching axial distance of inducer |
| CN108414205A (en) * | 2018-04-23 | 2018-08-17 | 浙江理工大学 | Adjustable experimental provision for studying inducer axial distance |
| CN109812452A (en) * | 2019-03-11 | 2019-05-28 | 西安航天动力研究所 | A kind of high-cavitation-resistance can induce wheel |
| CN110469542A (en) * | 2019-08-16 | 2019-11-19 | 中国航发北京航科发动机控制系统科技有限公司 | A kind of fuel inlet device improving centrifugal pump suction capacity |
| CN111765117A (en) * | 2020-06-29 | 2020-10-13 | 浙江理工大学 | Inducer for high-speed centrifugal pump and working method of inducer |
| CN112412870A (en) * | 2020-10-30 | 2021-02-26 | 中国航发西安动力控制科技有限公司 | Booster pump impeller |
| CN112412815A (en) * | 2020-10-30 | 2021-02-26 | 中国航发西安动力控制科技有限公司 | Fuel oil supercharging device integrated with oil return path |
| CN112302993A (en) * | 2020-11-25 | 2021-02-02 | 江苏大学 | Centrifugal pump impeller with offset wing type short blades |
| CN112855607A (en) * | 2021-01-18 | 2021-05-28 | 江苏大学 | Centrifugal pump impeller with a plurality of short blades |
| CN113376397A (en) * | 2021-04-30 | 2021-09-10 | 北京航天动力研究所 | Ultrahigh rotating speed measuring device and method for ultralow temperature liquid hydrogen pump |
| CN113623264A (en) * | 2021-08-16 | 2021-11-09 | 江苏大学 | Experimental device for can be used to inducer gas-liquid two-phase visual test |
| CN114396383A (en) * | 2022-01-10 | 2022-04-26 | 成都凯天电子股份有限公司 | Oil-gas mixed transportation system |
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