CN104251214B - Centrifugal pump - Google Patents
Centrifugal pump Download PDFInfo
- Publication number
- CN104251214B CN104251214B CN201410286913.4A CN201410286913A CN104251214B CN 104251214 B CN104251214 B CN 104251214B CN 201410286913 A CN201410286913 A CN 201410286913A CN 104251214 B CN104251214 B CN 104251214B
- Authority
- CN
- China
- Prior art keywords
- opening portion
- steam vent
- diameter
- suction inlet
- pump
- 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.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D9/00—Priming; Preventing vapour lock
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention provides a kind of centrifugal pump, and it can realize more stably capability development and the preferred ability reduction for suppressing pump and suppress at least one aspect in the amount of the gas of dissolving in a liquid the two aspects.Centrifugal pump (1) includes：Suction inlet (13), it sucks fluid；Impeller (5), it at least has multiple blades (51) in suction inlet side, and sucks fluid from suction inlet by being pivoted about with the defined axle (3) through suction inlet, and fluid is discharged to direction orthogonal to the axis；Pump head (6), it has suction inlet, and stores impeller；First opening portion (10), it is opened in the position opposed with multiple blades of suction inlet side of pump head；The position being present on the direction opposite with suction inlet side of second opening portion (11), its position being present on direction orthogonal to the axis for being opened in pump head and/or pump head；Path (12), the first opening portion is connected by it with the second opening portion.
Description
Technical field
The present invention relates to centrifugal pump.
Background technology
In general, using centrifugal pump in the cyclic process of liquid such as coolant needed for cooling in lathe.Centrifugal pump
Liquid is sucked with outside pressure difference using the pump chamber produced the rotation because of impeller, by the rotation that impeller is paid to liquid
The centrifugal force that is brought and discharge it.That is, the centrifugal force that centrifugal pump can be brought using the rotation and the rotation of impeller enters
The suction and discharge of row liquid.
If however, gas is mixed into liquid, will be centrifuged in the inside of centrifugal pump, i.e. liquid is to impeller
Outside is moved, and gas is trapped in the central part of impeller.Therefore, in centrifugal pump, if in liquid continue entrained gas, from
Under the influence of heart separation, being trapped in the gas of central part will grow up with the process of the duration of runs, and the gas grown up will be inhaled
Blocked near the central part of entrance and impeller, the reason for ability as pump is reduced.
It is used as the method for solving the problem, it is well known that open up through hole in the central part of impeller and be detained gas
In the rear side of impeller, discharged it using vacuum plant.In addition, in groove type vertical centrifugal pump, being used as the oriented pump of installation
The stage impeller construction of the impeller of suction inlet pressurization, it is well known that by making the retentate portion of gas for malleation to pump chamber
The method that outer row goes out gas.However, these methods must not cause cost to increase without new device or part.
On the other hand, in recent years, in lathe industry, for love environment and the purpose of reduction cost, it is intended to reduce cold
But the usage amount of liquid, sets the capacity of the tank of centrifugal pump to tend to reduce.Therefore, in tank, the cycle-index of coolant increases, because
The circulation of coolant and the gas increase produced, the gas for being drawn into centrifugal pump increases.As a result, the inside in centrifugal pump is stagnant
A large amount of bubbles are stayed, as described above, be trapped in the gas of the central part of impeller becomes more important to the discharge outside pump chamber.
It is the common purpose of each industry to care about environment and cut down cost, and is not limited to machine tool industry circle, and lathe is especially needed cold
But the cooling of liquid is, it is necessary to which the gas suppressed inside pump is detained the ability reduction of caused pump.
As the method for solving the problem, a kind of centrifugation pump is recorded in patent document 1, centrifugation pump tool
The interior zone for the pump chamber that standby impeller, the attraction sleeve around covering impeller are formed and it is provided with from interior zone and leads to suction
The attraction sleeve of the blast pipe of the outside of mouth side.Following content has been recorded in patent document 1：According to the centrifugation pump, energy
Enough blast pipes for attracting sleeve using being arranged at are discharged from the gas in the gas-liquid of suction inlet attraction from interior zone to outside.
Patent document 1：German patent application discloses No. 4325549 specification
, can be in the case of not causing cost increased out of pump using the centrifugation pump described in patent document 1
Gas is discharged in portion region to outside, suppresses the reduction of pump capacity.However, because the outlet of discharge pipe exists only in suction inlet
Side, therefore, a large amount of gases of discharge will be rolled among the attraction of pump and internal region is flowed into again.As a result, gas
Body is detained in the interior zone of pump, so the occurrence frequency for sucking bad condition increases.That is, pump can not play consistently the feelings of ability
Condition increases.Lathe industry in recent years looks forward to the centrifugal pump of energy rejection ability reduction, looks forward to that appearance can more stably be sent out strongly
Wave the centrifugal pump of ability.In addition, the difference of the species of liquid according to handled by centrifugal pump, needs also exist for suppression and is dissolved in liquid
The situation of the amount of gas (such as oxygen) in body.
The content of the invention
Therefore, it is an object of the invention to realize at least one aspect in following two aspects：Offer can more stably be sent out
The centrifugal pump of ability is waved, the centrifugal pump for the ability reduction that can suppress pump is preferably provided；Suppress the amount of the gas of dissolving in a liquid.
In order to solve the above-mentioned technical problem, reached purpose, centrifugal pump of the invention includes：Suction inlet, it sucks fluid；Leaf
Wheel, it at least has multiple blades in suction inlet side, and by being pivoted about with the defined axle through suction inlet
And fluid is sucked from suction inlet, discharge fluid to direction orthogonal to the axis；Pump head, it has suction inlet, and stores impeller；The
One opening portion, it is opened in the position opposed with multiple blades of suction inlet side of pump head；Second opening portion, it is opened in described
Pump head be present in at least one direction in direction that the axle is orthogonal and the direction opposite with the suction inlet side
Position；Path, the first opening portion is connected by it with the second opening portion.
The centrifugal pump of the present invention includes：Suction inlet, it sucks fluid；Impeller, it at least has multiple leaves in suction inlet side
Piece, and fluid is sucked from suction inlet by being pivoted about with the defined axle through suction inlet, to orthogonal to the axis
Direction discharge fluid；Pump head, it has suction inlet, and stores impeller；First opening portion, its be opened in pump head with suction
The opposed position of multiple blades of mouthful side；Second opening portion, it is opened in the portion being present on direction orthogonal to the axis of pump head
Position；Path, the first opening portion is connected by it with the second opening portion.
Path is preferably less than more than two ten.
The diameter of a circle obtained from the end of the internal side diameter of the blade by impeller is linked is set to Ds, and the diameter of impeller is set
In the case of for D, the first opening portion is preferably opened in more than 1.0Ds below 1.0D scope centered on axle.
The section orthogonal with its bearing of trend of path is preferably circular, the discharge of the diameter relative to discharge fluid in section
The diameter of mouth is preferably less than more than 10% 50%.
The centrifugal pump of the present invention can realize more stably capability development and the preferred ability reduction and suppression for suppressing pump
At least one aspect in the two aspects of the amount of the gas of dissolving in a liquid.
Brief description of the drawings
Fig. 1 is that the centrifugal pump of embodiments of the present invention includes the outside drawing of partial cross section.
Fig. 2 is the top view of the impeller represented from the suction surface side of embodiments of the present invention.
Fig. 3 is the sectional view of the overview for the head for representing embodiments of the present invention.
Fig. 4 is the top view of the inhalation mask of embodiments of the present invention.
Fig. 5 is inhalation mask region of the expression relative to the impeller diameter of embodiments of the present invention observed from projection
Top view.
Fig. 6 is the sectional view of the overview of the first variation of the head for representing embodiments of the present invention.
Fig. 7 is the sectional view of the overview of the second variation of the head for representing embodiments of the present invention.
Fig. 8 is the sectional view of the overview of the 3rd variation of the head for representing embodiments of the present invention.
Fig. 9 is the sectional view of the overview of the 4th variation of the head for representing embodiments of the present invention.
Figure 10 is the outside drawing of the testing equipment for the centrifugal pump for representing embodiments of the present invention.
Figure 11 is the chart of the result of the first performance experiment for the centrifugal pump for representing embodiments of the present invention.
Figure 12 be represent applied to embodiments of the present invention centrifugal pump the second performance test in head it is general
The sectional view of condition.
Figure 13 is the chart of the result of the second performance test of the centrifugal pump for representing embodiments of the present invention.
Description of reference numerals
1st, 1A centrifugal pumps；2 motor；2a flanges；3 axles；3a through holes；3b main parts；3c ends；3d threaded portions；3e keys；
4 protective covers；5 impellers；6th, 6A, 6B, 6C, 6D, 6E pump head；7 end faces；7a first end faces；7b second end faces；8 sides；The sides of 8a first
Face；8b second sides；9 pump chambers；9a regions；10th, the opening portions of 10a first；11st, the opening portions of 11b second；12 paths；12a、12b、
12c, 12d, 12e, 12f, 12g, 12h, 12i steam vent；13 suction inlets；14 outlets；14b spot-facings portion；15 supporting members；16、
16a L-type pipe arrangements；17th, 17a pipe arrangements；18 connection members；19a, 19b bolt；20a, 20b nut；21 impeller nuts；22 insertions
Hole；24 tank tanks；25 fluids；26 pipe arrangements (circulation is used)；27 pressure gauges；28 valves；29 outlets；30 connectors；50 disks；In 50a
Center portion；50b keyways；50c through holes；50d outer rims；51 blades；52 boss portions；53 circumference；60th, 600 shell；61st, 610 suction
Cover；62 recesses；63 convex portions；64 curved face parts；60a, 60b, 61b inner surface；61a planes；70 second outlets；C1、C2、C3、C4、
C5 centers；CL center lines；CP central areas；Dp depth；D, D1, D2, D3, D4 diameter；Db tank diameters；H、Hb、h1、h2、h3、h4、
H5 height；L1, L2, L3, L4, L5, L6, L7 length；P1, P2 dotted line；S scopes；α 1, the angles of α 2
Embodiment
Hereinafter, embodiments of the present invention are described in detail based on accompanying drawing.Note, the present invention is not by the embodiment
Restriction.
Fig. 1 is that the centrifugal pump of embodiments of the present invention includes the outside drawing of partial cross section.Fig. 2 is the implementation of the present invention
The top view of the impeller of mode.Fig. 3 is the sectional view of the overview for the head for representing embodiments of the present invention.Fig. 4 is this hair
The top view of the inhalation mask of bright embodiment.Fig. 5 is the expression observed from projection relative to embodiments of the present invention
Impeller diameter inhalation mask region top view.In the present embodiment, as prime mover of centrifugal pump 1, it will with electronic
Illustrated exemplified by machine, but prime mover not limited to this of centrifugal pump.For example, engine can also be used as prime mover by centrifugal pump.
Centrifugal pump 1 have motor 2, be connected to the axle 3 of motor 2, be connected to axle 3 end 3c impeller 5 and store
The pump head 6 of impeller 5.In addition, centrifugal pump 1 has configuration in the periphery of axle 3 and protects the protective cover 4 of axle 3 and be linked to protective cover 4
With the supporting member 15 of motor 2 and supporting motor 2.In addition, protective cover 4 is linked to supporting member 15 and pump head 6.Pump head 6
With shell 60 and inhalation mask 61, it is formed with the suction inlet 13 of suction fluid and discharges the outlet 14 of fluid.In addition, shell 60
Fixed with inhalation mask 61 by bolt 19b and nut 20b.Pump head 6 is formed with the first opening portion 10 in the position 65A of inhalation mask 61.
In addition, pump head 6 is formed with the second opening portion 11 in the position 65B of inhalation mask 61.On the inhalation mask 61 of pump head 6, be formed with by
First opening portion 10 and the path 12 of the second opening portion 11 connection.On outlet 14, it is connected with L-type towards the driving side of pump and matches somebody with somebody
Pipe 16.In addition, being connected with pipe arrangement 17 and connection member 18 on L-type pipe arrangement 16.
In centrifugal pump 1, and motor 2 is rotated axle 3 using being driven from outside supply electric power, make to consolidate
Impeller 5 due to the end 3c of axle 3 is pivoted about with the defined axle that is, center line CL through suction inlet 13, by
This, carry out fluid suction and discharge from fluid to the direction orthogonal with center line CL.
Motor 2 is the prime mover (driving source) for rotating axle 3.(the suction of centrifugal pump 1 on supporting member 15 of motor 2
The side of entrance 13) it is provided with flange 2a.Flange 2a is fixed on supporting member 15 by bolt 19a and nut 20a.
Axle 3 includes the main part 3b of the metal pole extended from motor 2 towards the side of pump head 6 and is fixed on the master
The end 3c of body portion 3b one end.Main part 3b is connected to motor 2, is protected by protective cover 4.End 3c is provided with key 3e,
Threaded portion 3d is formed with front of the 3c of end.Protective cover 4 is for example fixed with supporting member 15 by welding, to supporting member 15
Supported.
Impeller 5 has multiple blades, a diameter of D.Specifically, as shown in Fig. 2 impeller 5 has disk 50 and multi-disc leaf
Piece 51.Impeller 5 makes six blades 51 be shaped in a diameter of D resinous disk 50.Note, although not shown, but in circle
The dorsal part of disk 50 is similarly integrally formed with six blades.Boss portion 52 is formed with the central part 50a of disk 50.Boss portion 52
It is formed with the through hole 50c including keyway 50b.As shown in figure 1, impeller 5 is by making key 3e be entrenched in keyway 50b and by impeller
Nut 21 is screwed into the threaded portion 3d of axle 3 and is fixed on the end 3c of axle 3.
In impeller 5, diameter Ds circle obtained from the end of the internal side diameter of blade 51 of the boss portion 52 with linking impeller 5
Region CP centered between week 53.Impeller 5 makes six blades 51 configure the radial outside in central area CP.Blade 51 is from circumference
53 are formed deviously towards the outer rim 50d of disk 50 to the reverse directions of impeller 5, and the circumference towards disk 50 is equally spaced configured.Circle
Disk 50 is not limited to the metal systems such as resin-made or stainless steel.Here, impeller 5 can not also make disk 50 and blade 51
It is integrally formed.Installed for example, impeller 5 can also be on disk 50 formed by blade 51.
As shown in figure 3, pump head 6 is drum, with the through hole 3a and suction inlet 13 centered on center line CL, and
And store impeller 5.Pump head 6 has columned shell 60, the inhalation mask 61 of Flange-shaped Parts and fixes shell 60 with inhalation mask 61
Bolt 19b and nut 20b.
In shell 60, the end face on the center line CL directions as pump head 6 is (as the end on center line CL directions
Face) 7 first end face 7a is formed as vertical with center line CL.On shell 60, it is formed with from first end face 7a towards recess 62a
Through hole 3a centered on center line CL.Axle 3 is inserted into through hole 3a.
Shell 60 is formed with through hole 3a, recess 62 and recess 62a centered on center line CL.Recess 62 is with to insertion
The mode of hole 3a sides protrusion is formed on the face (face of the side of suction inlet 13) of the side of inhalation mask 61.Recess 62 with plane 61d by intersecting
And the inner surface 60d parallel with center line CL and the inner surface 60c vertical with center line CL are formed.Recess 62 from inhalation mask 61
The depth that inner surface 60c is arrived in the face (face of the side of suction inlet 13) of side is dp.Recess 62 is formed at the through hole 3a sides of recess 62
It is exactly inner surface 60c.Recess 62a is by the inner surface 60b parallel with center line CL and the inner surface 60a shape vertical with center line CL
Into.
On shell 60, the side as pump head 6 (end face on the direction orthogonal with center line CL of pump head 6) is formed with
8 first side 8a.On shell 60, the outlet opened up from first side 8a to recess 62a inner surface 60b is formed with
14.A diameter of D3 of the end of the inner surface 60a sides of outlet 14.That is, the sky of outlet 14 and recess 62a inside
Between be connected position opening a diameter of D3.Shell 60 is formed with spot-facing portion 14b in outlet 14, the spot-facing portion 14b from
First side 8a is recessed towards recess 62, is connected for pipe arrangement.Spot-facing portion 14b be not limited in order that pipe arrangement insertion become easily and
Set.For example, if it is possible to which pipe arrangement is connected to outlet 14, spot-facing portion 14b can also be not provided with.
As shown in figure 3, on inhalation mask 61, be formed with the plane 60e vertical with center line CL, it is parallel with center line CL and
The second side 8b of side 8 as pump head 6 and second end face that is vertical with center line CL and possessing the end face 7 as pump head 6
7b curved face part 64.In addition, possessing the convex portion 63 that height is H on inhalation mask 61, the convex portion 63 is by parallel with center line CL
Curved surface 61c and the plane 61a vertical with center line CL are formed, and are protruded from curved face part 64 towards shell 60.On inhalation mask 61
Through hole is formed with, the through hole turns into the suction centered on center line CL from second end face 7b towards plane 61a insertions
Mouth 13.
Pump head 6 is in the side of suction inlet 13 of inhalation mask 61 and the position 65A opposed with multiple blades 51 of impeller 5 offers
One opening portion 10.First opening portion 10 be opened in the side of suction inlet 13 of inhalation mask 61 and with multiple blades of a diameter of D impeller 5
On 51 opposed plane 61a.
In addition, pump head 6 offers the second opening portion 11 in the position 65B being present on the direction orthogonal with center line CL.
Specifically, on the direction orthogonal with center line CL, the second opening portion 11 is offered on second side 8b.That is, in this reality
Apply in mode, the position 65Bs that is present in center line CL orthogonal direction on of the second side 8b equivalent to pump head 6.First opens
The center C1 formation of oral area 10 is on the circumference of a diameter of D1 centered on center line CL.Also, the first opening portion 10 is opened up
In the central area CP of impeller 5 vicinity.Second opening portion 11 is opened on the direction orthogonal with center line CL.Second opening portion
11 center C2 formation is in the position with second end face 7b distances R.In addition, being formed with threaded portion in the second opening portion 11
31。
Steam vent 12a and steam vent 12b is formed with inhalation mask 61.The orthogonal with bearing of trend of steam vent 12a is cut
Face and the steam vent 12b section orthogonal with bearing of trend are circle.Inhalation mask 61 makes steam vent 12a be connected with steam vent 12b
And form path 12.Steam vent 12a be from the first opening portion 10 towards second end face 7b extension, length be L1 and a diameter of d1
Hole.Steam vent 12b be extend from the second opening portion 11 towards suction inlet 13, the hole that length is L2 and a diameter of d1.Exhaust
The hole 12a end and the steam vent 12b end with the opposite side of the second opening portion 11 with the opposite side of the first opening portion 10
Connected in inhalation mask 61 with angle [alpha] 1.Thus, steam vent 12a forms the path 12 being connected with steam vent 12b, exposed to recess
62a the first opening portion 10 is connected with the second opening portion 11 exposed to side 8b.Steam vent 12a length L1 ratios are from plane
61a to second end face 7b length LH is short, and steam vent 12b length L2 is than the length LW from second side 8b to inner surface 61b
It is short.In the present embodiment, steam vent 12a and steam vent 12b diameter d1 is same size, but is not limited to this, can also
It is diameter different from each other.Moreover, being connected with 90 ° of angle [alpha] 1, but be not limited to this, angle [alpha] 1 for example can also be acute angle or
Obtuse angle.
As shown in figure 4, on inhalation mask 61, in order that bolt 19b is passed through, foring eight through holes 22 and suction inlet
13.Moreover, the first opening portion 10, the second opening portion 11, steam vent 12a and steam vent 12b respectively every four be one group with angle [alpha]
2 interval is formed.Here, angle [alpha] 2 is the angle on the basis of center line CL1, it is adjacent steam vent 12b institutes each other
Into angle.Although in the present embodiment, angle [alpha] 2 is 90 °, this is not limited to.For example, the first opening portion 10, second opening
Oral area 11, steam vent 12a and steam vent 12b can also be one to three.Moreover, the first opening portion 10, the second opening portion 11, row
Stomata 12a and steam vent 12b can also be more than five, and angle [alpha] 2 can also be made to be formed as 60 ° or 30 °.
As shown in figure 3, pump head 6 is by the way that the convex portion 63 of inhalation mask 61 is inserted into formed by the recess 62 of shell 60.
Specifically, recess 62 makes the inner surface 60d of recess 62 be contacted with the curved surface 61c of convex portion 63 with convex portion 63, makes the flat of recess 62
Face 61d is contacted with the plane 60e of curved face part 64.The height H-shaped of the convex portion 63 of inhalation mask 61 turns into the recess 62 than shell 60
Depth dp is low.Therefore, if the convex portion 63 of inhalation mask 61 is inserted into the recess 62 of shell 60 and pump head 6 is formed, work is formd
For the pump chamber 9 of inner space.
Pump chamber 9 is formed by suction inlet 13, region 9a and outlet 14.Region 9a is inner surface 60a, the interior table by shell 60
The space that the plane 61a of face 60b, inner surface 60c and inner surface 60d and inhalation mask convex portion 63 is surrounded.In the 9a of region,
A plane 61a part is connected with suction inlet 13, and an inner surface 60d part is connected with outlet 14.That is, pump chamber 9 is from suction
Entrance 13 reaches the region of outlet 14 via region 9a.As shown in figure 1, the fluid discharged from outlet 14 passes through L-type pipe arrangement
16th, it is connected to the pipe arrangement 17 of L-type pipe arrangement 16 and the connection member 18 connected via supporting member 15 is discharged to outside.Pump chamber 9
Be make shell 60 combined with inhalation mask 61 obtained from interior zone, but be not limited to this.Even if adding for example, pump head 6 is one
Even work product or products formed, as long as pump chamber 9 is formed with the region as stream.
Centrifugal pump 1 is produced and negative pressure and then sucked from suction inlet 13 in the inlet portion of impeller 5 using by rotating impeller 5
The principle of fluid.Also, in order to accumulate in the gas of interior zone to the outside discharge of pump chamber 9, centrifugal pump 1 needs and than impeller
The low on the pressure side connected path 12 of 5 central area CP pressure.For example, in the centrifugal pump 1 being impregnated in tank, if
Without can be produced in the case where pump is used alone than in the field of the central area CP of the impeller 5 lower pressure of pressure produced
Institute, then also can not just produce.Therefore, there is pressurization in 51, the blade of impeller 5, therefore in pump head 6 close to impeller 5
Central area CP and the position 65A opposed with the blade 51 of impeller 5, open up from pump chamber 9 lead to outside path 12.Therefore,
Gas can be gone out using the outer row of pressure difference to the pump chamber 9 between the central area CP of impeller 5 and the outside of pump chamber 9.Also, it is logical
Cross the position 65B being present on the direction orthogonal with center line CL that the second opening portion 11 is arranged on to pump head 6, the gas being discharged
Body turns into broken bubble under the pressurization of impeller 5, floats in tank in fluid.Further, it is possible to suppress bubble again
Enter from suction inlet 13.That is, in situation about only discharging the gas for accumulating in central area CP as bubble in the side of suction inlet 13
Under, a large amount of bubbles are sucked from suction inlet 13.Also, the bubble being inhaled into is discharged into tank again.That is, bubble in tank with
Pump interior circulation.In the present embodiment, a large amount of bubbles are discharged to the direction orthogonal with center line CL and floated in tank.Cause
This, centrifugal pump 1 can suppress bubble and enter again from suction inlet 13.As a result, accumulating in the amount of central area CP gas
Reduce, therefore, centrifugal pump 1 can suppress to suck the bad and bad generation of discharge, can play consistently ability.Moreover, by
Reduced in the amount for the gas for accumulating in central area CP, therefore centrifugal pump 1 is capable of the reduction of rejection ability.
If bubble is contacted with liquid, the gas for forming bubble is incorporated in liquid sometimes.In this case, bubble residence
Time in a liquid is longer, and the amount for being dissolved in the gas of liquid is more.In the present embodiment, bubble to center line CL just
The distance that the direction discharge of friendship and the water surface into tank float is discharged and the water surface into tank than bubble from the side of suction inlet 13
The distance floated is short.Therefore, compared with the situation of bubble is only discharged from the side of suction inlet 13, time of the bubble residence in liquid
It is short.As a result, centrifugal pump 1 can suppress the amount of the gas dissolved in liquid.
The bar number of path 12 is preferably less than more than two ten.Here, the bar number of path 12 represents to discharge the road of bubble
The bar number in footpath.It it is more than two by making the bar number of path 12, as long as relative to center line CL equivalent arrangements, it becomes possible to evenly
Discharge bubble.On the other hand, by making path 12 be less than ten, the liquid for the amount that the ability that causes pump is reduced can not discharged
In the case of body, efficiently it is exhausted.It is further preferred that path 12 is less than more than four eight.
It is set to by the diameter of the initiating terminal of the blade 51 of impeller 5 (circle obtained from linking the end of center line CL sides)
Ds, in the case that the diameter of impeller 5 is set into D, the first opening portion 10 be preferably opened in centered on center line CL 1.0Ds with
In upper below 1.0D scope S.In other words, the first opening portion 10 is preferably formed in by the diameter centered on center line CL
In the scope S that circle for 1.0Ds and a diameter of 1.0D centered on center line CL circle are surrounded.Here, such as Fig. 5
Shown, scope S represents what the dotted line P1 by the dotted line P2 for representing 1.0Ds with representing 1.0D was surrounded in inhalation mask 61
Part, including dotted line P1, P2.
By the outside (bag for the circle for making a diameter of 1.0Ds that the first opening portion 10 is opened in centered on center line CL
Include border), centrifugal pump 1 can discharge central area CP gas under the pressurization of impeller 5 from the first opening portion 10.It is another
Aspect, the first opening portion is formed by the inner side (including border) of the circle in a diameter of 1.0D centered on center line CL
10, centrifugal pump 1 can suppress liquid and be flowed out under the pressurization of impeller 5 from the first opening portion 10, can suppress the ability of pump
Reduction.
In addition, the first opening portion 10 be more preferably opened in a diameter of 1.05Ds centered on center line CL circle and
The outside of less circle in a diameter of 1.0Ds+7mm circle.Here, 1.0Ds+7mm is in the blade 51 of impeller 5
The length LW and length shown in Fig. 3 are considered on the basis of the diameter Ds at top (linking circle obtained from the end of center line CL sides)
It is worth obtained from L2 difference that is, minimum wall thickness (MINI W.) and the minimum diameter of path 12.Minimum wall thickness (MINI W.) is preferably that 1mm (is calculated as with diameter
2mm), the minimum diameter of path is preferably 5mm.If the first opening portion 10 is in the outside of a diameter of 1.05Ds circle or diameter
For the outside of 1.0Ds+7mm circle, then minimum wall thickness (MINI W.), therefore the handling ease of the first opening portion 10 are able to ensure that.The opposing party
Face, the first opening portion 10 is more preferably opened in the inner side of a diameter of (D-Ds)/2+Ds circle.Here, a diameter of (D-Ds)/2+
Ds circle is the circle through scope S center.If the first opening portion 10 is in the inner side of a diameter of (D-Ds)/2+Ds circle,
Be conducive to discharging bubble by the pressurization of impeller 5.
The diameter d1 of path 12 is preferably less than more than 10% 50% relative to the diameter D3 of outlet 14.By making diameter
D1 is more than 10% relative to the diameter D3 of outlet 14, can continuously be discharged and the gas that is attracted substantially equal gas
Bubble.On the other hand, it is less than 50% by making diameter d1 relative to the diameter D3 of outlet 14, can suppresses to be connected to outlet 14
The situation that the liquid of transfer is all discharged.Specifically, diameter d1 is preferably more than 5mm below 20mm.Diameter d1 is more preferably
More than 8mm below 12mm.
Fig. 6 is the sectional view of the overview of the first variation of the head for representing embodiments of the present invention.First deformation
Example is identical with foregoing embodiment, and difference is that the second opening portion 11 is opened in pump head 6A position 65B, and second
Outlet 70 is also opened in pump head 6A position 65C.In the explanation of the first variation, omission pair and foregoing implementation in principle
The explanation of mode identical structure, is illustrated centered on different structures.
Pump head 6A has the in the side of suction inlet 13 of inhalation mask 61 and the position 65A opposed with multiple blades 51 of impeller 5
One opening portion 10.First opening portion 10 is opened in the side of suction inlet 13 of inhalation mask 61 and opposed with multiple blades 51 of impeller 5
On plane 61a.
In addition, pump head 6A offers the second opening portion 11 in the position 65B being present on the direction orthogonal with center line CL.
Specifically, on the direction orthogonal with center line CL, the second opening portion 11 is offered on second side 8b.Moreover, pump head
6A offers the second outlet 70 in the position 65C of inhalation mask 61.That is, in this variation, second side 8b is equivalent to pump head
The 6A position 65B being present on the direction orthogonal with center line CL.In addition, positions of the second end face 7b equivalent to pump head 6A
65C。
The center C1 formation of first opening portion 10 is on the circumference of a diameter of D1 centered on center line CL.Also, the
One opening portion 10 is opened in the central area CP of impeller 5 vicinity.Second opening portion 11 is opened in the side orthogonal with center line CL
Upwards.The center C2 formation of second opening portion 11 is in the position with second end face 7b distances R.Moreover, the second outlet 70
It is opened on the circumference with the concentric and a diameter of D1 in the first opening portion 10.In addition, in the second opening portion 11 and the second outlet 70
In be formed with threaded portion 31.
Steam vent 12c and steam vent 12b is formed with inhalation mask 61.The orthogonal with bearing of trend of steam vent 12c is cut
Face and the steam vent 12b section orthogonal with bearing of trend are circle.Inhalation mask 61 makes steam vent 12b be connected with steam vent 12c
And form path 12.Steam vent 12c be from the first opening portion 10 towards second end face 7b extension, length be LH and a diameter of d1
Hole.In addition, steam vent 12c is from the insertion of the first opening portion 10 to second end face 7b.Steam vent 12b is from the court of the second opening portion 11
Extend to suction inlet 13, length is L2 and a diameter of d1 hole.Also, steam vent 12c is extend in one direction logical
Road, steam vent 12b is the path extended in a different direction with steam vent 12c, path and exhaust corresponding to steam vent 12c
Path corresponding to the 12b of hole is connected with angle [alpha] 1.Thus, steam vent 12b forms the path 12 being connected with steam vent 12c, exposure
In recess 62a the first opening portion 10, the second outlet 70 exposed to second end face 7b and exposed to second side 8b
Two opening portions 11 are connected.Steam vent 12b length L2 is shorter than the length LW from second side 8b to inner surface 61b.In this implementation
In mode, steam vent 12b and steam vent 12c diameter d1 are same size, but are not limited to this or different from each other
Diameter.Moreover, being connected with 90 ° of angle [alpha] 1, but this is not limited to, angle [alpha] 1 for example can also be acute angle or obtuse angle.
In the first variation of the present invention, the second opening portion is connected by being formed on pump head 6A from the first opening portion 10
11 and second outlet 70 path 12, centrifugal pump 1 accumulates from pump chamber 9 via steam vent 12b, 12c to pump head 6A outside discharge
There is the central area CP of impeller 5 gas.The centrifugal pump 1 of first variation is also in pump head 6A position 65C that is, suction inlet
13 sides are formed with outlet.Also, from the direction orthogonal with center line CL and suction inlet side discharge bubble.Therefore, with only inhaling
The situation of entrance side discharge bubble is compared, and the first variation can also discharge bubble from the direction orthogonal with center line CL, therefore
The amount increase that bubble floats in tank.Also, the first variation can also suppress to suck the amount of bubble again from suction inlet.Its
As a result, the centrifugal pump 1 of the first variation can suppress to suck the bad and bad generation of discharge, energy can be played consistently
Power.Further, since the amount for accumulating in central area CP gas is reduced, therefore the first variation can suppress the ability drop of pump
It is low.
In addition, compared with the situation of bubble is only discharged from suction inlet side, bubble is from the second opening portion 11 and the second outlet
70 discharges, therefore, the amount for the bubble that the water surface into tank floats increases.As a result, with only discharging bubble from suction inlet side
Situation compare, the first variation can suppress to dissolve the amount of gas in a liquid.
Fig. 7 is the sectional view of the overview of the second variation of the head for representing embodiments of the present invention.Second deformation
Example is identical with the embodiment shown in Fig. 3, and difference is that the second opening portion 11b is opened in pump head 6B position 65D.
In the explanation of two variations, the explanation to the structure shown in Fig. 3 is omitted in principle, is illustrated centered on different structures.
Pump head 6B is offered in the side of suction inlet 13 of inhalation mask 61 and the position 65A opposed with multiple blades 51 of impeller 5
First opening portion 10.First opening portion 10 is opened in the side of suction inlet 13 of inhalation mask 61 and opposed with multiple blades 51 of impeller 5
Plane 61a on.
In addition, pump head 6B offers the second opening portion 11 in the position 65B being present on the direction orthogonal with center line CL.
Specifically, on the direction orthogonal with center line CL, the second opening portion 11 is offered on second side 8b.Moreover, pump head
6B offers the second opening portion 11b in the position 65D of shell 60.That is, in this variation, second side 8b is equivalent to pump head 6B
The position 65B being present on the direction orthogonal with center line CL.In addition, position 65Ds of the first end face 7a equivalent to pump head 6B.
The center C1 formation of first opening portion 10 is on the circumference of a diameter of D1 centered on center line CL.Also, the
One opening portion 10 is opened near the central area CP of impeller 5.Second opening portion 11 is opened in the direction orthogonal with center line CL
On, the center C2 formation of the second opening portion 11 is in the position with second end face 7b distances R.Moreover, the second opening portion 11b
C3 formation in center is on the circumference of a diameter of D2 centered on center line CL.In addition, in the second opening portion 11 and the second opening
Threaded portion 31 is formed with portion 11b.
Steam vent 12a, steam vent 12b, steam vent 12d and steam vent 12e are formed with inhalation mask 61.Steam vent 12a,
Steam vent 12b, steam vent 12d and steam vent the 12e section orthogonal with bearing of trend are circle.Inhalation mask 61 makes steam vent
12a, steam vent 12b, steam vent 12d and steam vent 12e are connected and form path 12.Steam vent 12a is from the first opening portion 10
Extend towards second end face 7b, length is L1 and a diameter of d1 hole.Steam vent 12b is from the second opening portion 11 towards suction
The extension of mouth 13, the hole that length is L2 and a diameter of d1.Steam vent 12d is extended from the second opening portion 11b towards plane 61d
, the hole that length is L3 and a diameter of d1.In addition, steam vent 12d is through to plane 61d from the second opening portion 11b.Steam vent
12e be extend from plane 60e towards second end face 7b, the hole that length is L4 and a diameter of d1.Steam vent 12a's opens with first
The end of the opposite side of oral area 10 and steam vent 12b with the end of the opposite side of the second opening portion 11 in inhalation mask 61 with angle
Degree α 1 is connected.In addition, steam vent 12d with the end of the second opening portion 11b opposite side and steam vent 12e's and second end face
The end connection of 7b opposite side.Moreover, the position of steam vent 12e second end face 7b sides in the inhalation mask 61 with angle [alpha] 1 with
Steam vent 12b connections.Thus, steam vent 12a, steam vent 12b, steam vent 12d and steam vent 12e form connected path 12.
Also, exposed to recess 62a the first opening portion 10, the second opening portion 11b exposed to first end face 7a and exposed to second
Side 8b the second opening portion 11 is connected.In the present embodiment, steam vent 12a diameter d1, steam vent 12b, steam vent 12d
And steam vent 12e diameter d1 is same size, but it is not limited to this or diameter different from each other.Moreover, with 90 °
Angle [alpha] 1 connect, but be not limited to this, angle [alpha] 1 for example can also be acute angle or obtuse angle.
In the second variation of the present invention, by forming the first opening portion 10, the second opening portion 11, the on pump head 6B
Two opening portion 11b, steam vent 12a, steam vent 12b, steam vent 12d and steam vent 12e, centrifugal pump 1 can be from pump chambers 9 via row
Stomata 12a, steam vent 12b, steam vent 12d and steam vent 12e accumulate in the central area of impeller 5 to pump head 6B outside discharge
CP gas.The pump of second variation makes the second opening portion 11b formation in pump head 6B position 65D that is, opposite with suction inlet
Side.Also, bubble is discharged from the direction orthogonal with center line CL and the direction opposite with suction inlet.Therefore, with only inhaling
The situation of entrance side discharge bubble is compared, and the second variation can preferably suppress the amount that centrifugal pump 1 sucks bubble again.It is tied
Fruit is that the pump for possessing the second variation can suppress to suck the bad and bad generation of discharge, being capable of more stably capability development.
Further, since the amount for accumulating in central area CP gas is reduced, therefore the first variation can suppress the ability reduction of pump.
In addition, in the second variation, bubble is discharged up to the distance floated to the water surface compares bubble from the second opening portion 11b
Discharged from suction inlet side short up to floating the distance to the water surface.Moreover, bubble is discharged up to floating to water from the second opening portion 11b
The distance in face is discharged short up to floating the distance to the water surface than bubble from the second opening portion 11.Therefore, the centrifugation of the second variation
Pump 1 can shorten the time of bubble residence in a liquid, therefore, it is possible to further reduce the time of bubble residence in a liquid.Cause
This, with only from compared with the situation of direction discharge bubble orthogonal center line CL, the second variation can preferably suppress dissolving
The amount of gas in a liquid.
Here, the second variation represents to discharge from direction that center line CL is orthogonal and the direction opposite with suction inlet side
The example of bubble, but it is also possible to the outlet of bubble is only formed to the direction opposite with suction inlet side.That is, only in pump head 6B portion
The second opening portion 11b of position 65D formation example.
By only forming the outlet that is, the second opening portion 11b of bubble to the direction opposite with suction inlet side, bubble is only
From the second opening portion 11b discharges.That is, bubble is discharged from closer to the direction of the water surface in tank.With only from center line CL just
The example of the direction discharge bubble of friendship is compared, and the distance that bubble floating plays the water surface also shortens, and the time being detained in a liquid also becomes
It is short.As a result, the second variation can preferably suppress to dissolve the amount of gas in a liquid.Further, since can be more preferable
Ground suppresses the amount of the gas of dissolving in a liquid, therefore is especially suitable for handling the situation of the liquid for the dissolving for wanting to reduce gas.
Fig. 8 is the sectional view of the overview of the 3rd variation of the head for representing embodiments of the present invention.3rd deformation
Example is identical with the embodiment shown in Fig. 3, and difference is that the second opening portion 11c is opened in pump head 6C position 65E.
In the explanation of three variations, the explanation to the structure shown in Fig. 3 is omitted in principle, is illustrated centered on different structures.
Pump head 6C is offered in the side of suction inlet 13 of inhalation mask 61 and the position 65A opposed with multiple blades 51 of impeller 5
First opening portion 10.Specifically, the first opening portion 10 be opened in inhalation mask 61 the side of suction inlet 13 and with multiple leaves of impeller 5
On the opposed plane 61a of piece 51.
In addition, pump head 6C offers the second opening portion in the position 65E being present on the direction orthogonal with center line CL
11c.Specifically, on the direction orthogonal with center line CL, the second opening portion 11c is offered on first side 8a.At this
In variation, the position 65Es that is present in center line CL orthogonal direction on of the first side 8a equivalent to pump head 6C.
The center C1 formation of first opening portion 10 is on the circumference of a diameter of D1 centered on center line CL.Also, the
One opening portion 10 is opened in the central area CP of impeller 5 vicinity.Second opening portion 11c is opened in the side orthogonal with center line CL
Upwards, the second opening portion 11c center C4 formation is in the position with first end face 7a distances R1.In addition, in the second opening
Threaded portion 31 is formed with portion 11c.
Steam vent 12f is formed with shell 60.In addition, being formed with steam vent 12g and steam vent on inhalation mask 61
12h.Steam vent 12f, steam vent 12g and steam vent the 12h section orthogonal with bearing of trend are circle.Shell 60 and inhalation mask
61 make steam vent 12f, steam vent 12g and steam vent 12h be connected and form path 12.Steam vent 12f is from the second opening portion 11c
Extend towards inner surface 60d, length is L6 and a diameter of d1 hole.In addition, steam vent 12f runs through from the second opening portion 11c
To inner surface 60d.Steam vent 12g be from the first opening portion 10 towards second end face 7b extension, length be L5 and a diameter of d1
Hole.Steam vent 12h be extend from curved surface 61c towards suction inlet 13, the hole that length is L7 and a diameter of d1.Steam vent 12f
With the end of the second opening portion 11c opposite side and being connected with the end of the opposite side of suction inlet 13 for steam vent 12h.Exhaust
Hole 12g with the end of the end of the opposite side of the first opening portion 10 and steam vent 12h and curved surface 61c opposite side in suction
Connected in cover 61 with angle [alpha] 1.Thus, steam vent 12f, steam vent 12g and steam vent 12h form connected path 12, are exposed to
Recess 62a the first opening portion 10 is connected with the second opening portion 11c exposed to first side 8a.
Steam vent 12g length L5 is shorter than the length LH from plane 61a to second end face 7b, steam vent 12h length L7
It is shorter than length LW from second side 8b to inner surface 61b.Steam vent 12g length L5 is longer than the steam vent 12a's shown in Fig. 3
Spend L1 short.Moreover, steam vent 12f length L6 and steam vent 12h length L7 length altogether and the steam vent shown in Fig. 3
12b length L2 length is identical.In this variation, steam vent 12f, steam vent 12g and steam vent 12h diameter d1 are same
One size, but it is not limited to this or diameter different from each other.Moreover, being connected with 90 ° of angle [alpha] 1, but it is not limited to
This, angle [alpha] 1 for example can also be acute angle or obtuse angle.
By forming the first opening portion 10, the second opening portion 11c, steam vent 12f, steam vent 12g and row on pump head 6C
Stomata 12h, centrifugal pump 1 is accumulated from pump chamber 9 via steam vent 12f, steam vent 12g and steam vent 12h to pump head 6C outside discharge
There is the central area CP of impeller 5 gas.In the 3rd variation, steam vent 12g length L5 is than the steam vent shown in Fig. 3
12a length L1 is short.Therefore, the distance of discharge bubble shortens, drag reduction during discharge bubble.Therefore, it is easier to discharge gas
Bubble.Also, compared with the situation of bubble is only discharged in the side of suction inlet 13, the 3rd variation can suppress to suck bubble again
Amount.As a result, the centrifugal pump 1 of the 3rd variation can suppress to suck the bad and bad generation of discharge, can stably it send out
Wave ability.The amount for the gas for accumulating in central area CP that can reduce is additionally, since, therefore the 3rd variation can suppress pump
Ability is reduced.
Fig. 9 is the sectional view of the overview of the 4th variation of the head for representing embodiments of the present invention.4th deformation
Example is identical with foregoing embodiment, and difference is to be provided with multiple first opening portions 10,10a.In the 4th variation
In explanation, explanation of the omission pair with foregoing embodiment identical structure, is carried out only centered on different structures in principle
Explanation.
Pump head 6D is offered in the side of suction inlet 13 of inhalation mask 61 and the position 65A opposed with multiple blades 51 of impeller 5
First opening portion 10 and the first opening portion 10a.First opening portion 10 and the first opening portion 10a are opened in the suction inlet of inhalation mask 61
On 13 sides and the plane 61a opposed with multiple blades 51 of impeller 5.
In addition, pump head 6D offers the second opening portion 11 in the position 65B being present on the direction orthogonal with center line CL.
Specifically, on the direction orthogonal with center line CL, the second opening portion 11 is offered on second side 8b.That is, in this change
In shape example, the position 65Bs that is present in center line CL orthogonal direction on of the second side 8b equivalent to pump head 6D.
The center C1 formation of first opening portion 10 is on the circumference of a diameter of D1 centered on center line CL.In addition, the
One opening portion 10a center C5 formation is on the circumference of a diameter of D4 centered on center line CL.Also, the first opening portion 10
It is opened in the central area CP of impeller 5 vicinity.Second opening portion 11 is opened on the direction orthogonal with center line CL, and second opens
The center C2 formation of oral area 11 is in the position with second end face 7b distances R.In addition, being formed with spiral shell in the second opening portion 11
Line portion 31.
Steam vent 12a, steam vent 12b and steam vent 12i are formed with inhalation mask 61.Steam vent 12a, steam vent 12b
And the steam vent 12i section orthogonal with bearing of trend is circle.Inhalation mask 61 makes steam vent 12a, steam vent 12b and steam vent
12i is connected and forms path 12.Steam vent 12a be from the first opening portion 10 towards second end face 7b extension, length be L1 and
A diameter of d1 hole.Steam vent 12b be from the second opening portion 11 towards suction inlet 13 extension, length be L2 and a diameter of d1
Hole.Steam vent 12i be extend from the first opening portion 10a towards second end face 7b, the hole that length is L1 and a diameter of d1.Exhaust
The hole 12a end and the steam vent 12b end with the opposite side of the second opening portion 11 with the opposite side of the first opening portion 10
Connected in inhalation mask 61 with angle [alpha] 1.In addition, steam vent 12i end with the first opening portion 10a opposite side and exhaust
Hole 12b is connected in inhalation mask 61 with angle [alpha] 1.Thus, steam vent 12a, steam vent 12b and steam vent 12i form connected lead to
Road 12, exposed to recess 62a the first opening portion 10 and the first opening portion 10a and the second opening portion exposed to second side 8b
11 are connected.
Steam vent 12a and steam vent 12i length L1 is shorter than the length LH from plane 61a to second end face 7b.Steam vent
12b length L2 is shorter than the length LW from second side 8b to inner surface 61b.In the present embodiment, steam vent 12a, exhaust
Hole 12b and steam vent 12i diameter d1 is same size, but is not limited to this or diameter different from each other.Moreover,
Connected with 90 ° of angle [alpha] 1, but be not limited to this, angle [alpha] 1 for example can also be acute angle or obtuse angle.
By forming the first opening portion 10, the first opening portion 10a, steam vent 12a, steam vent 12b and row on pump head 6D
Stomata 12i, centrifugal pump 1 is accumulated from pump chamber 9 via steam vent 12a, steam vent 12b and steam vent 12i to pump head 6D outside discharge
There is the central area CP of impeller 5 gas.Further, it is possible to suppress the bubble discharged from the second opening portion 11 again from suction inlet
13 enter.As a result, the centrifugal pump 1 of the 4th variation can suppress, suction is bad and discharge is bad, plays consistently ability.
In addition, compared with only opening up the situation of first opening portion, the 4th variation can increase the discharge rate of bubble.Its result
It is that the 4th variation can reduce the amount for the gas for accumulating in central area CP, therefore, it is possible to preferably suppress the ability drop of pump
It is low.In addition, compared with the situation of bubble is only discharged from suction inlet side, the amount increasing to the bubble of the water surface is floated in the 4th variation
It is many.Therefore, the 4th variation can reduce the amount for being detained bubble in a liquid, therefore, it is possible to suppress to dissolve gas in a liquid
The amount of body.
【Embodiment】
In order to evaluate the performance of centrifugal pump of the invention, air injection testing has been carried out as first performance experiment and second
Performance test.Equipment appearance when Figure 10 represents to implement first and second performance test of the centrifugal pump of the present invention.Such as Figure 10 institutes
Show, centrifugal pump 1A performance test sinks to centrifugal pump 1A head 6E in the tank tank 24 for accumulating in acrylic resin
In fluid (clear water) 25, make fluid 25 in the interior circulation of tank tank 24, by forced into centrifugal pump 1A injection air (air) come
Measure centrifugal pump 1A ability reduction.There is centrifugal pump 1A discharge rate to be that 250L/min, total head are that 23m, rotating speed are
2900min-1And the performance that output power of motor is 3.7kW.In addition, the tank diameter Db of tank tank 24 is 780mm, the height Hb of tank
For 470mm.Moreover, flexible pipe, which is connected to, can adjust the air compressor (not shown) of air capacity, make air (air) from water
It is middle to be invaded to centrifugal pump 1A.
The position relationship of tank tank 24 and centrifugal pump 1A is：Height h1 from the bottom of tank to liquid level is 370mm, from pump head
The height h2 of 6E second end face 7b to liquid level is 170mm, and the height h3 of the upper end from liquid level to tank is 100mm, from the bottom of tank
Portion is 200mm to pump head 6E height h4, is 270mm from height h5s of the pump head 6E second end face 7b to the upper end of tank.In addition,
The circulation of fluid 25 is the connection member 18 by the way that pipe arrangement 26 to be connected to centrifugal pump 1A and turns again in tank tank 24
Capable.On pipe arrangement 26, the discharge in order to measure pump is pressed and is mounted with pressure gauge 27, but also is pacified to adjust the flow of pump
Valved 28.In addition, when making pipe arrangement 26 return to fluid 25, make the refluxing opening of pipe arrangement 26 away from suction inlet with as far as possible not to pump
Performance is impacted, so as to eliminate the air intrusion caused by the influence of circulation as much as possible.
The shape and construction of the inhalation mask 61 used in first performance experiment are identical with the inhalation mask 61 shown in Fig. 6.Therefore,
Omit the description.In inhalation mask 61, the path that bubble is discharged from the first opening portion 10 to the second opening portion 11 is four, from first
The path that bubble is discharged in opening portion 10 to the second outlet 70 is four.The center C1 of first opening portion 10 diameter D1 is
90mm, the diameter d1 of path 12 is 11mm.In addition, the diameter D of impeller 5 is 166mm, the initiating terminal of the blade 51 of impeller 5 (links
Obtained from the end of center line CL sides circle) diameter Ds be 70mm.Embodiment 1 is to close the second outlet 70 and make bubble only
The example discharged from the second opening portion 11.Embodiment 2 is from the second opening portion 11 and the second outlet 70 this two side discharge bubble
Example.Comparative example is the example for closing the second opening portion 11 and the second outlet 70.Implementing embodiment 1, embodiment 2 and ratio
During compared with example, the second opening portion 11 and the second outlet 70 are closed by the way that connector 30 is threaded into portion 31.
Air injection testing is, by making centrifugal pump 1A be operated with 50Hz, to utilize valve 28 by Flow-rate adjustment to 50L/min
Valve 28 is fixed afterwards, adjusted the rotating speed of motor to 50Hz from 30Hz with 5Hz interval using frequency converter, by air mass flow
Count and inject air using air compressor to carry out.Its result is illustrated in fig. 11.Discharge pressure (m) in figure represents injection
With the situation after the maximum air injection rate (L/min) of injection before air.When discharge pressure (m) is reading divided by the experiment of pressure gauge 27
The proportion of the clear water used simultaneously carries out Metric System-Concentration and obtains numerical value.
The presence or absence of in first performance experiment, due to operating centrifugal pump 1A on the basis of frequency (rotating speed), therefore path
Discharge pressure (m) is caused to change.Therefore, the performance evaluation of centrifugal pump of the invention is directed to maximum air injection rate (L/min)
The reduction of research evaluation discharge pressure (m).That is, represent that maximum air injection rate (L/min) is more and discharge presses the reduction of (m) to get over
It is small, then it is more effective, as long as discharge pressure being reduced to of (m) 1.0 (m) is just effective below.In embodiments of the present invention that is,
In embodiment 1 and embodiment 2, even if maximum air injection rate (L/min) is 10.0 most (L/min), the drop of discharge pressure (m)
It is low also at 1.0 (m) below.On the other hand, in the comparative example for all blocking the second opening portion, although there is maximum air note
It is 0.4 (L/min) but example of the reduction still above 1.0 (m) of discharge pressure (m) to enter amount (L/min).Thus, it can be known that with being compared
Example is compared, embodiment 1 and the more effective fruit of embodiment 2.
In addition, in embodiment 1, it is able to confirm that by visual observation when discharging bubble from the second opening portion 11, bubble is to liquid
The situation that face rises.In example 2, it is able to confirm that bubble is to liquid when discharging bubble from the second outlet 70 by visual observation
Situation and the situation from the suction bubble of suction inlet 13 that face rises.That is, embodiment 1 and embodiment 2 is to orthogonal with center line CL
Bubble is discharged in direction, and bubble floats in tank, therefore inhibits the amount of the gas of suction and dissolving from suction inlet 13.Cause
This, can suppress suction it is bad, play consistently the ability of pump.In a comparative example, the second opening portion 11 is plugged entirely, therefore gas
A part for bubble is discharged from outlet 14.In addition we know, even if embodiment 1 injects about ten times of air compared with comparative example,
Inhibiting the ability of pump reduces.In a comparative example, if maximum air injection rate (L/min) is more than 0.8 (L/min), discharge pressure
(m) it is greatly reduced.
Next, being illustrated to the second performance test.Second performance test, which is utilized, has discharge rate for 100L/min, entirely
Lift is that 10m, rotating speed are 2900min-1And output power of motor has carried out above-mentioned air for the centrifugal pump of 3.7kW performance
Injection testing.Its result is illustrated in fig. 13.When carrying out air injection testing, due to the size of tank tank, tank tank with
The configuration of centrifugal pump, the connection method of pipe arrangement are identical with the example shown in above-mentioned Figure 10, therefore omit the description.
Figure 12 is half section on the pump width of the overview of the head to representing to use in the second performance test
The sectional view that face is indicated.As shown in figure 12, pump head 6F is formed by combination shell 600 and inhalation mask 610.In shell
The second opening portion 11b and steam vent 12d is formed with 600.The first opening portion 10, second opening is formed with inhalation mask 610
Portion 11, the second outlet 70, steam vent 12b, steam vent 12c and steam vent 12e.Steam vent 12b, steam vent 12c, steam vent
12d and steam vent 12e diameter are d1.Also, pipe arrangement 17a and L as shown in figure 12, are installed in the second opening portion 11b
Type pipe arrangement 16a, bubble is discharged into air from L-type pipe arrangement 16a outlet 29.The second discharge is closed by being screwed into connector 30
Mouth 70.First opening portion 10 is formed at four positions on plane 61a, and is formed with 90 ° of interval with the center line CL of axle 3
Centered on a diameter of D1 circumference on.Steam vent 12b, steam vent 12c, steam vent 12d and steam vent 12e are respectively formed with four
Bar.In inhalation mask 610, the path 12 that bubble is discharged from the first opening portion 10 to the second opening portion 11 is four, is opened from first
Oral area 10 is four via the second opening portion 11b paths 12 for discharging bubble to outlet 29.In addition, from the first opening portion 10 to
The path 12 of second outlet 70 discharge bubble is four.The center C1 of first opening portion 10 diameter D1 is 90mm, path
Diameter d1 is 11mm.In addition, the diameter D of impeller 5 is 135mm, the initiating terminal of the blade 51 of impeller 5 (links center line CL sides
Obtained from end circle) diameter Ds be 70mm.
Embodiment 1 is the example for making bubble only be discharged from L-type pipe arrangement 16a outlet 29.Embodiment 2 be make bubble only from
The example of second opening portion 11 discharge.Comparative example is the example for closing the second opening portion 11, the outlet 70 of outlet 29 and second
Son.Conventional example is the example for only opening up the second outlet 70.When implementing conventional example, comparative example, embodiment 1 and embodiment 2, lead to
Installation connector 30 is crossed to close the second opening portion 11, the outlet 70 of outlet 29 and second.
Air injection testing in being tested with first performance is identical, and the air injection testing in the second performance test is also logical
Crossing makes centrifugal pump 1A be operated with 50Hz, fixes valve 28 after using valve 28 by Flow-rate adjustment to 50L/min, utilizes frequency converter
The rotating speed of motor is adjusted to 50Hz with 5Hz interval from 30Hz, air is injected using air compressor by mass air flow sensor
Come carry out.The method that the measurement of discharge pressure (m) is measured in also being tested with first performance is identical.Represent that it is tied in fig. 13
Really.
It is identical with first performance experiment, it is also to transport centrifugal pump 1A on the basis of frequency (rotating speed) in the second performance test
Turn, therefore the presence or absence of path also causes discharge pressure (m) to change.Therefore, in the second performance test, tested with first performance
Identical, the performance evaluation of centrifugal pump is also to be directed to the reduction of maximum air injection rate (L/min) research evaluation discharge pressure (m).
That is, represent that maximum air injection rate (L/min) is more and discharge presses the reduction of (m) smaller, then it is more effective, as long as discharge pressure
(m) be reduced to 1.0 (m) is just effective below.In embodiments of the present invention that is, embodiment 1 and embodiment 2, even if most
Big air injection rate (L/min) is 13.0 most (L/min), the reduction of discharge pressure (m) also at 1.0 (m) below.
In addition, in embodiment 1, the situation that bubble is discharged with liquid from outlet 29 is able to confirm that by visual observation.In reality
Apply in example 2, be able to confirm that by visual observation when discharging bubble from the second opening portion 11, the situation that bubble rises to liquid level.Than
Compared with example, outlet 29, the second opening portion 11 and the second outlet 70 are plugged entirely, therefore a part for bubble is arranged from outlet
Go out.The result of comparing embodiment 1, embodiment 2 and comparative example is understood, compared with the result of comparative example, embodiment 1 and embodiment 2
Result it is more preferable.In addition we know, even if embodiment 1 injects about twice of air compared with comparative example, it also inhibits the ability of pump
Reduction.Moreover, compared with conventional example, embodiment 1 inhibits the bubble being discharged to be flowed into again from suction inlet.In addition, dissolving
The amount of gas because bubble float to the water surface and into air discharge and reduce.As a result, can suppress suction it is bad, stably
Play the ability of pump.In a comparative example, if maximum air injection rate (L/min) is more than 3.0 (L/min), discharge pressure (m) is significantly
Reduction.
Claims (5)
1. a kind of centrifugal pump, it is characterised in that including：
Suction inlet, it sucks fluid；
Impeller, it at least has multiple blades in the suction inlet side, and by with through the defined axle of the suction inlet
Pivot about and suck the fluid from the suction inlet, the fluid is discharged to the direction orthogonal with the axle；
Pump head, it has the suction inlet, and stores the impeller；
First opening portion, it is only opened in the position opposed with the multiple blade of the suction inlet side of the pump head；
Second opening portion, its be opened in the pump head be present in the direction orthogonal with the axle and with suction inlet side phase
The position at least one direction in anti-direction；
Path, first opening portion is connected by it with second opening portion；
The diameter of first opening portion and a diameter of more than 5mm below 20mm of the path.
2. centrifugal pump according to claim 1, it is characterised in that
The path is less than more than two ten.
3. centrifugal pump according to claim 1 or 2, it is characterised in that
The diameter of a circle obtained from the end of the internal side diameter of the blade by the impeller is linked is set to Ds, by the impeller
Diameter be set to D in the case of, first opening portion is opened in more than 1.0Ds below 1.0D's centered on the axle
In the range of.
4. centrifugal pump according to claim 1 or 2, it is characterised in that
The section orthogonal with its bearing of trend of the path is circle, and the diameter in the section is relative to the discharge fluid
A diameter of less than more than the 10% 50% of outlet.
5. centrifugal pump according to claim 3, it is characterised in that
The section orthogonal with its bearing of trend of the path is circle, and the diameter in the section is relative to the discharge fluid
A diameter of less than more than the 10% 50% of outlet.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013137373A JP6088918B2 (en) | 2013-06-28 | 2013-06-28 | Centrifugal pump |
| JP2013-137373 | 2013-06-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104251214A CN104251214A (en) | 2014-12-31 |
| CN104251214B true CN104251214B (en) | 2017-09-01 |
Family
ID=52186397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410286913.4A Active CN104251214B (en) | 2013-06-28 | 2014-06-24 | Centrifugal pump |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6088918B2 (en) |
| KR (1) | KR101742355B1 (en) |
| CN (1) | CN104251214B (en) |
| HK (1) | HK1204353A1 (en) |
| TW (1) | TWI572781B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05113200A (en) * | 1991-10-22 | 1993-05-07 | Mitsubishi Heavy Ind Ltd | Gas/liquid two-phase fluid pump |
| DE4325549C3 (en) * | 1993-07-29 | 1997-04-24 | Brinkmann Pumpen K H Brinkmann | Centrifugal pump |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6331281U (en) * | 1986-08-13 | 1988-02-29 | ||
| US4776758A (en) * | 1987-07-06 | 1988-10-11 | Kamyr Ab | Combined fluidizing and vacuum pump |
| TWI274106B (en) * | 2005-06-10 | 2007-02-21 | Delta Electronics Inc | Centrifugal pump with air venting design |
| DE102006016199A1 (en) * | 2006-04-06 | 2007-10-11 | Alfa Laval Kolding A/S | Self-venting centrifugal pump |
| AT510538B1 (en) * | 2010-09-27 | 2013-02-15 | Andritz Ag Maschf | CENTRIFUGAL PUMP |
| KR101251504B1 (en) * | 2010-12-03 | 2013-04-05 | 현대자동차주식회사 | Oil pump system for automatic transmission |
| CN103122860B (en) * | 2013-03-06 | 2015-06-17 | 新昌德力石化设备有限公司 | Internal exhausting liquid ring type self-priming centrifugal pump |
-
2013
- 2013-06-28 JP JP2013137373A patent/JP6088918B2/en active Active
-
2014
- 2014-03-03 TW TW103107089A patent/TWI572781B/en active
- 2014-06-20 KR KR1020140075669A patent/KR101742355B1/en active IP Right Grant
- 2014-06-24 CN CN201410286913.4A patent/CN104251214B/en active Active
-
2015
- 2015-05-21 HK HK15104844.3A patent/HK1204353A1/en unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05113200A (en) * | 1991-10-22 | 1993-05-07 | Mitsubishi Heavy Ind Ltd | Gas/liquid two-phase fluid pump |
| DE4325549C3 (en) * | 1993-07-29 | 1997-04-24 | Brinkmann Pumpen K H Brinkmann | Centrifugal pump |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6088918B2 (en) | 2017-03-01 |
| TW201502380A (en) | 2015-01-16 |
| JP2015010566A (en) | 2015-01-19 |
| KR20150002480A (en) | 2015-01-07 |
| KR101742355B1 (en) | 2017-05-31 |
| TWI572781B (en) | 2017-03-01 |
| CN104251214A (en) | 2014-12-31 |
| HK1204353A1 (en) | 2015-11-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7316501B2 (en) | Apparatus and method for mixing dissimilar fluids | |
| US8245890B2 (en) | Intake nozzle for a pump | |
| CN107588008A (en) | A kind of double outlet multipurpose external-mix self-priming pumps with similar spiral shape suction room | |
| CN106481568B (en) | Self-priming shields combination pump | |
| CN104251214B (en) | Centrifugal pump | |
| CN109157993B (en) | Micro-nano bubble generator and generation method | |
| CN110259622A (en) | A kind of conical draft tube with ellipse and regular hexagonal cell | |
| CN117090792B (en) | Vertical rotary jet pump with rotor cavity air rapid discharging function | |
| CN105090044B (en) | Centrifugal pump | |
| CN206715497U (en) | A kind of underwater combined type natural gas gas-liquid separation device | |
| CN106224331A (en) | The online air bubble eliminating device of combined type fluid | |
| CN203285697U (en) | Scale preventing oil-submerged pump | |
| CN102852801A (en) | Sectional multi-stage pump | |
| CN111365244A (en) | Vertical pipeline multistage pump | |
| CN204921463U (en) | Impeller of immersible pump for well | |
| CN115059645A (en) | Hydraulic oil tank with forced degassing structure | |
| CN207920971U (en) | The tapering type water suction flow passage structure of annular and the centrifugal pump using the structure | |
| CN206027956U (en) | Water conservancy is separator with higher speed | |
| KR101346001B1 (en) | High pressure fluid pump equipped with inducer | |
| CN206468545U (en) | A kind of low noise deep well pump | |
| CN106968957A (en) | One kind is carried from degassing function wash pump | |
| CN112443488A (en) | Double-volute rotating double-flow-passage vertical long-shaft pump | |
| CN206071899U (en) | A kind of deep well pump of band from sand discharge structure | |
| CN205841220U (en) | High intensity staged horizontal water pump | |
| EP3642490A1 (en) | Helical impeller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: DE Ref document number: 1204353 Country of ref document: HK |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: WD Ref document number: 1204353 Country of ref document: HK |