CN207004908U - A kind of inducer of no blade tip clearance leakage - Google Patents

A kind of inducer of no blade tip clearance leakage Download PDF

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Publication number
CN207004908U
CN207004908U CN201720597029.1U CN201720597029U CN207004908U CN 207004908 U CN207004908 U CN 207004908U CN 201720597029 U CN201720597029 U CN 201720597029U CN 207004908 U CN207004908 U CN 207004908U
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CN
China
Prior art keywords
inducer
blade tip
tip clearance
axial
clearance leakage
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Active
Application number
CN201720597029.1U
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Chinese (zh)
Inventor
朱国俊
罗兴锜
冯建军
吴广宽
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Xian University of Technology
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Xian University of Technology
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Priority to CN201720597029.1U priority Critical patent/CN207004908U/en
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Abstract

The utility model discloses a kind of inducer of no blade tip clearance leakage, including inducer hub body, a circle axial--flow blading is evenly distributed with along the circumference of inducer hub body, the outer rim of axial--flow blading is coaxially provided with wheel rim ring set, the inner surface of axial--flow blading and wheel rim ring set fixes as one, and inducer hub body is provided with locking nut close to one end end of pump inlet.Solves the problems, such as blade tip clearance cavitation and cavitation erosion present in existing inducer running and clearance leakage of blade tip stream.

Description

A kind of inducer of no blade tip clearance leakage
Technical field
The utility model belongs to Fluid Machinery and Engineering equipment technical field, is related to a kind of induction of no blade tip clearance leakage Wheel.
Background technology
Inducer belongs to a kind of aial flow impeller, be typically mounted on impeller of pump import be used for elevator pump inlet pressure from And improve its performance that cavitates.The screw type impeller of inducer generally use, there is blade tip clearance in it between pump intake housing.Due to The presence of blade tip clearance, easily produced when inducing the fluid at wheel rim to stream blade tip clearance at a high speed in the presence of positive back side pressure difference Raw clearance cavitation, the cavitation corrosion effect that blade tip clearance cavitation is induced can be such that the blade at induction wheel rim cracks and breach, So that the hydraulic performance decline of inducer, and then causing the Cavitation Occurred in Centrifugal Pumps after inducer, this phenomenon is in some small-scale high rotational speeds It is especially apparent in pump (such as vehicle mounted fire pump).
Utility model content
The purpose of this utility model is to provide a kind of inducer of no blade tip clearance leakage, solves existing inducer operation During existing blade tip clearance cavitation and cavitation erosion and clearance leakage of blade tip stream the problem of.
The utility model is the technical scheme adopted is that a kind of inducer of no blade tip clearance leakage, including inducer wheel Hub body, a circle axial--flow blading is evenly distributed with along the circumference of inducer hub body, the outer rim of axial--flow blading is coaxially provided with wheel Edge ring set, the inner surface of axial--flow blading and wheel rim ring set fix as one, and inducer hub body is close to one end end of pump inlet Portion is provided with locking nut.
The characteristics of the utility model, also resides in,
Wherein the quantity of axial--flow blading is no less than 3.
Wherein the outer surface of wheel rim ring set is provided with continuous spiral shape labyrinth seal tooth.
Wherein the tooth form of spiral shape labyrinth seal tooth is rectangle.
The precession direction of wherein spiral shape labyrinth seal tooth is:From inducer import to outlet, by with inducer rotation side Precession is carried out in the opposite direction.
Wherein locking nut is coniform or hemispherical.
The beneficial effects of the utility model are, using the axial-flow pump that axial distance is short in inducer disclosed in the utility model Blade, therefore entirely inducer is compact-sized, is easy to arrange.Meanwhile the type inducer does not have blade tip clearance therefore will not produced Clearance cavitation, not only protect inducer from the destruction of blade tip clearance cavitation and cavitation erosion, extend the service life of inducer, together When eliminate negative effect of the tip clearance leakage flow to inducer lift, to ensure that the impeller after inducer is stable, the fortune of safety Row provides effective guarantee.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the inducer of no blade tip clearance leakage of the utility model;
Fig. 2 is the structural representation that a kind of inducer of no blade tip clearance leakage of the utility model is arranged on water pump.
In figure, 1. inducer hub bodies, 2. axial--flow bladings, 3. wheel rim ring sets, 4. locking nuts, 5. rotary shafts, 6. pumps Suction casing, 7. pump bodies.
Embodiment
The utility model is described in detail with reference to the accompanying drawings and detailed description.
A kind of inducer of no blade tip clearance leakage of the utility model, structure as shown in figure 1, including inducer hub body 1, Be evenly distributed with a circle axial--flow blading 2 along the circumference of inducer hub body 1 (same axial location), axial--flow blading 2 it is outer Edge is coaxially provided with wheel rim ring set 3, and the inner surface of axial--flow blading 2 and wheel rim ring set 3 fixes as one, and inducer hub body 1 leans on One end end of nearly pump inlet is provided with locking nut 4.
Wherein the quantity of axial--flow blading 2 is no less than 3.
Wherein the outer surface of wheel rim ring set 3 is provided with continuous spiral shape labyrinth seal tooth.
Wherein the tooth form of spiral shape labyrinth seal tooth is rectangle.
The precession direction of wherein spiral shape labyrinth seal tooth is:From inducer import to outlet, by with inducer rotation side Precession is carried out in the opposite direction.
Wherein locking nut 4 is coniform or hemispherical.
A kind of inducer of no blade tip clearance leakage of the utility model, when being installed on pump housing body 7, as shown in Fig. 2 luring Guide wheel hub body 1 is installed in rotary shaft 5 by key connection, is then locked the (center of locking nut 4 with locking nut 4 Place offers screwed hole, and the end of rotary shaft 5 is provided with external screw thread, and rotary shaft 5 is connected by screw thread with locking screw 4, locking screw Mother 4, which had both served, is positioned at inducer hub body 1 in rotary shaft 5, can play guide functions again).
The inducer of a kind of no blade tip clearance leakage of the present utility model, by by the short axial--flow blading 2 of axial distance On inducer hub body 2, the axial dimension of whole inducer is shortened.Then by pacifying in the outer rim of axial--flow blading 2 The annular flange ring set 3 that a circle is connected to one with axial--flow blading 2 is filled, eliminates the blade tip clearance of inducer so that Current no longer produce gap cavitation when passing through inducer, extend the service life of inducer, while have also eradicated leaf Push up negative effect of the tip leakage flow to inducer lift.Exist between wheel rim ring set 3 and pump inlet housing 6 it is radial and axial between Gap, the spiral shape labyrinth seal tooth of the outer surface of wheel rim ring set 3 is when inducer rotates, to the outer surface of wheel rim ring set 3 and pump inlet Fluid in radial clearance between housing 6 produces " pumping effect ", fluid is obtained pumping pressure energy, counteracts in radial clearance and promote Fluid is produced the pressure difference of leakage, prevent fluid to leak, so as to reach good sealing effectiveness.
A kind of inducer of no blade tip clearance leakage of the present utility model eliminates to be occurred in conventional inducer operation process Blade tip clearance cavitation and cavitation erosion phenomenon, protect inducer from the destruction of blade tip clearance cavitation and cavitation erosion, while also eradicated leaf Push up negative effect of the tip leakage flow to inducer lift, it is ensured that the operation of impeller stabilization, safety after inducer.

Claims (6)

  1. A kind of 1. inducer of no blade tip clearance leakage, it is characterised in that:Including inducer hub body (1), along inducer wheel hub The circumference of body (1) is evenly distributed with a circle axial--flow blading (2), and the outer rim of axial--flow blading (2) is coaxially provided with wheel rim ring set (3), the inner surface of axial--flow blading (2) and wheel rim ring set (3) fixes as one, and inducer hub body (1) is close to pump inlet One end end is provided with locking nut (4).
  2. A kind of 2. inducer of no blade tip clearance leakage according to claim 1, it is characterised in that:The axial--flow blading (2) quantity is no less than 3.
  3. A kind of 3. inducer of no blade tip clearance leakage according to claim 1, it is characterised in that:The wheel rim ring set (3) outer surface is provided with continuous spiral shape labyrinth seal tooth.
  4. A kind of 4. inducer of no blade tip clearance leakage according to claim 3, it is characterised in that:The spiral shape labyrinth The tooth form for sealing tooth is rectangle.
  5. A kind of 5. inducer of no blade tip clearance leakage according to claim 3, it is characterised in that:The spiral shape labyrinth The precession direction of sealing tooth is:From the inducer import to outlet, enter by the direction opposite with the inducer direction of rotation Row precession.
  6. A kind of 6. inducer of no blade tip clearance leakage according to claim 1, it is characterised in that:The locking nut (4) it is coniform or hemispherical.
CN201720597029.1U 2017-05-26 2017-05-26 A kind of inducer of no blade tip clearance leakage Active CN207004908U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720597029.1U CN207004908U (en) 2017-05-26 2017-05-26 A kind of inducer of no blade tip clearance leakage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720597029.1U CN207004908U (en) 2017-05-26 2017-05-26 A kind of inducer of no blade tip clearance leakage

Publications (1)

Publication Number Publication Date
CN207004908U true CN207004908U (en) 2018-02-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720597029.1U Active CN207004908U (en) 2017-05-26 2017-05-26 A kind of inducer of no blade tip clearance leakage

Country Status (1)

Country Link
CN (1) CN207004908U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106996389A (en) * 2017-05-26 2017-08-01 西安理工大学 A kind of short distance inducer without blade tip clearance cavitation
CN109764000A (en) * 2019-02-25 2019-05-17 江苏大学 A kind of mixed-flow pump runner envelope with spiral shape pumping groove

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106996389A (en) * 2017-05-26 2017-08-01 西安理工大学 A kind of short distance inducer without blade tip clearance cavitation
CN109764000A (en) * 2019-02-25 2019-05-17 江苏大学 A kind of mixed-flow pump runner envelope with spiral shape pumping groove
CN109764000B (en) * 2019-02-25 2020-06-09 江苏大学 Mixed flow pump runner chamber with spiral pumping groove

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