CN105443397B - Electronic pump - Google Patents
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- CN105443397B CN105443397B CN201410495854.1A CN201410495854A CN105443397B CN 105443397 B CN105443397 B CN 105443397B CN 201410495854 A CN201410495854 A CN 201410495854A CN 105443397 B CN105443397 B CN 105443397B
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Abstract
A kind of electronic pump, including first shell, separation set, second shell, rotor part and stator component；Rotor part includes impeller, pump shaft and rotor, and the inner cavity of electronic pump that the first, second shell opposing seal is arranged and is formed, electronic pump further includes an axially stop block, for limit first end from impeller to pump shaft axial movement；Impeller includes blade and back shroud of impeller；Electronic pump further includes axial force balance structure, and axial force balance structure includes the relief hole through back shroud of impeller setting；Higher-pressure region where low-pressure area where relief hole is connected to import and rotor；Axial force balance structure further includes that back shroud of impeller is having protruding ring and corresponding to the annular groove of protruding ring second shell setting, protruding ring insertion annular groove inner cavity close to outlet and towards import is oppositely arranged；Axial force balance structure is set in this way, reduces axial thrust, reduces parts depreciation, improve service life.
Description
[technical field]
The present invention relates to a kind of centrifugal pumps, and in particular to a kind of electric drive centrifugal pump.
[background technique]
In general, electronic pump is for transporting fluid working substance.Working medium in pump is rotated together by impeller drive, in the work of centrifugal force
The edge of pump case is thrown toward under, so that certain pressure is generated, then from outlet or pipeline outflow；At the center of impeller then
Since working medium is thrown out of and pressure reduction, so that the working medium of upstream is under the differential pressure action at the import of pump housing and the center of impeller
It is inhaled into pump housing through water pipe.Therefore, it is achieved that transporting for working medium.The impeller of electronic pump is connect with rotor, when rotor quilt
Existing electromagnetism power drive between rotor and stator and when rotating, impeller is rotated.
When electronics pump work, the inlet of pump housing is low-pressure area, and exit is higher-pressure region, front shroud of impeller and pump case
Between there are the first gaps, there are the second gaps between back shroud of impeller and pump case.First gap be connected to simultaneously higher-pressure region and
Low-pressure area, the second gap are but only connected with higher-pressure region.In this way, the pressure that is subject to of front shroud of impeller Zi close to exit to it is close enter
It is gradually decreased at mouthful, but the always high pressure that back shroud of impeller whole surface is subject to.In this way, the pressure that back shroud of impeller is subject to is big
It in front shroud of impeller, just generates a resultant force and impeller is pushed at pump intake, so that impeller and the dress for being used for axial limiting
It sets and (such as: circlip, bearing) is tightly pressed at together, generate biggish frictional force, loss of energy, while can also reduce dependent part
The service life of part.
Therefore, it is necessary to be improved to existing technology, to solve the above technical problem.
[summary of the invention]
The purpose of the present invention is to provide one kind can reduce axial thrust, reduces frictional dissipation, improves the associated components longevity
The electronic pump of life.
To achieve the above object, the present invention adopts the following technical scheme: a kind of electronic pump, including first shell, separate set,
Second shell, rotor part and stator component；First, second shell forms the inner cavity of the electronic pump, the separation
The inner cavity of the electronic pump is divided into wet chamber and dry chamber by set, and the rotor part is set to the wet chamber, the stator component
It is set to the dry chamber, the wet chamber is provided with inlet and outlet, and the rotor part includes impeller, and the impeller includes blade
And back shroud of impeller；The back shroud of impeller and the blade are fixedly installed；When the electronics pump work, the wet chamber includes can
Low-pressure area, higher-pressure region and the higher pressure area of connection, the low-pressure area and the inlet communication, the higher-pressure region and the outlet
Connection, the higher pressure area includes the part wet chamber below the back shroud of impeller；The electronic pump further includes one axial
Limiting device, the axially stop block be used for limit the impeller due to pressure imbalance to the import direction axial direction fortune
It is dynamic to be no more than preset distance；The electronic pump further includes axial force balance structure, and the axial force balance structure includes running through institute
State the relief hole of back shroud of impeller setting；The relief hole is connected to the low-pressure area and the higher pressure area；The axial force is flat
Weighing apparatus structure further includes the protruding ring and the annular groove for separating set setting of the back shroud of impeller setting, the protruding ring
It is set on the back shroud of impeller and reversely raised towards the import, the part protruding ring is inserted into the annular groove
Chamber, it is spaced apart between the outer surface of the protruding ring and the annular groove inner wall, form gap.
The relief hole includes at least two apertures, and the aperture is distributed about the central symmetry of the back shroud of impeller,
The quantity of the aperture is less than or equal to the quantity of the blade.
The phase that the aperture equidistantly distributed, the adjacent small hole center and the back shroud of impeller line of centres are constituted
Angle is identical, and the distance at the center of back shroud of impeller described in the centre distance of each adjacent apertures is identical.
The back shroud of impeller is provided with the impeller mounting hole, and the aperture is set as close as possible to the impeller mounting hole
It sets, each aperture is set in the starting point line and adjacent blades starting point and the back shroud of impeller of adjacent blades
In the region that heart line and the impeller mounting hole outer rim are constituted.
The diameter of the back shroud of impeller is D2, and the diameter of the aperture is d, and the diameter d of the aperture is more than or equal to institute
0.08 times for stating 0.01 times of the diameter D2 of back shroud of impeller and the diameter D2 less than or equal to the back shroud of impeller is described small
The first distance at back shroud of impeller center described in the centre distance of hole is R, and the first distance R is more than or equal to the back shroud of impeller
0.05 times of diameter D2 and be less than or equal to 0.25 times of diameter D2 of the back shroud of impeller.
The free end of the protruding ring is arranged to sharp-edged, and the sharp-edged is formed by carrying out chamfering in the protruding ring,
The angle of the chamfering is less than or equal to 45 degree.
The height of projection of the protruding ring is more than or equal to 0.02 times of the back shroud of impeller external profile diameter less than or equal to institute
0.2 times for stating back shroud of impeller external profile diameter.
The distance at center of the protruding ring inner wall apart from the back shroud of impeller is greater than the centre distance of the relief hole
The distance at the center of the back shroud of impeller；The diameter D1 for the circumference that the outer wall of the protruding ring is formed is more than or equal to impeller rear cover
0.8 times of the diameter D2 for the circumference that plate outer edge is formed, while the diameter D1 of the circumference of the outer wall formation of the protruding ring is small
In the diameter D2 for being equal to the circumference that the back shroud of impeller outer edge is formed.
The gap be include radial clearance and axial gap, wherein the radial clearance is the annular protrusion side wall
With the gap between the annular groove side wall, the axial spacing is annular groove bottom described in the annular protrusion distance from top
The gap in portion, the radial clearance are greater than 0.004 times of the impeller rear end cap external profile diameter less than or equal to the impeller rear end
0.02 times of lid external profile diameter.
The rotor assembly is set in the stator module inner diameter volume, the rotor and the impeller integrated injection molding at
Type is provided with a second annular groove, the impeller in the faying face of the rotor and the back shroud of impeller on the rotor
The region on back shroud top is connected to the region where the second annular groove by the relief hole.
Compared with prior art, the present invention passes through the protruding ring of setting cooperation and the axis of circular groove structure and relief hole
To dynamic balance structure, so that act on the pressure reduction to import direction of back shroud of impeller lower surface, and then to import direction
Axial thrust reduce, reduce frictional dissipation, improve the service life of associated components.
[Detailed description of the invention]
Fig. 1 is the axial schematic cross-sectional view of first embodiment of the invention electronic pump；
Fig. 2 is rotor part structural schematic diagram shown in Fig. 1；
Fig. 3 is front shroud of impeller schematic structural cross-sectional view shown in Fig. 1；
Fig. 4 is the partial enlargement diagram of A portion shown in Fig. 1；
Fig. 5 is the axial schematic cross-sectional view of second embodiment of the invention electronic pump；
Fig. 6 is rotor part structural schematic diagram shown in Fig. 5；
Fig. 7 is back shroud of impeller shown in Fig. 5 and blade construction schematic diagram；
Fig. 8 is the partial enlargement diagram of B portion shown in Fig. 5；
Fig. 9 is the pressure distribution trend schematic diagram for acting on back shroud of impeller of electronic pump shown in Fig. 5；
Figure 10 is third embodiment of the invention electronic pump axial direction schematic cross-sectional view；
Figure 11 is rotor part structural schematic diagram shown in Figure 10；
Figure 12 is the 4th kind of embodiment electronic pump axial direction schematic cross-sectional view of the invention.
[specific embodiment]
The present invention will be further explained below with reference to the attached drawings and specific examples:
As shown in Figures 1 to 12, electronic pump 100,200,300,400 includes rotor part 1, outer housing 2, separates set 3, is fixed
Subassembly 8, circuit board 9；Outer housing 2 includes first shell 21 and second shell 22, and rotor part 1 includes pump shaft 12, impeller 11
And rotor 13；First shell 21 and second shell 22 form the inner cavity of electronic pump 100, separate set 3 for 100 inner cavity of electronic pump point
Be divided into two independent cavitys, two independent cavitys be respectively as follows: for working media circulation wet chamber 31 and working media not into
The dry chamber 32 entered；Sealed set forms wet chamber 31 between first shell 21 and separation set 3, between second shell 22 and separation set 3
Sealed set forms dry chamber 32；Rotor part 1 is set to wet chamber 31, and stator component 8 and circuit board 9 are set to dry chamber 31, in this way
Stator component 8 and circuit board 9 are not contacted with working media, can prevent stator component 8 and circuit board 9 from being corroded by working media,
Lead to product failure；Stator component 8 and circuit board 9 and separation set 3 and/or second shell 22 are fixedly installed, stator component 8 and electricity
By electrical connection between road plate 9, the curent change by controlling stator component 8 generates between stator component 8 and rotor part 9
Magnetic field force realizes the rotary motion of rotor part 1；Wet chamber 31 is connected to import 20 and outlet 30, when electronics pump work, working media
Enter wet chamber 31 by import 20, boosts after the rotary motion of rotor part 1 and wet chamber 31 is left by outlet 30；In this way
Import 20 is connected to low-pressure area 311, and outlet 30 is connected to higher-pressure region 312, and wet chamber 31 further includes a higher pressure zone 313, compared with
High-pressure zone 313 is located between 11 lower section of impeller and the bottom of cylinder for separating set 2, and pressure is less than or equal to the pressure of higher-pressure region 312.
Electronic pump 100 further includes an axially stop block, when electronic pump 100 works, for limiting impeller 11 to 20 direction of import
It is axially moved within a predetermined range.Electronic pump 100 further includes an axial force balance structure, axial when electronic pump 100 works
Dynamic balance structure can be such that impeller 11 reduces to the axial force resultant force in 20 direction of import, rub to reduce to axially stop block
It wipes, reduces the loss of axially stop block, and then improve the service life of product.
As shown in Figure 1 to 11, rotor part 1 includes impeller 11, pump shaft 12, rotor 13；13 impeller 11 of rotor is enclosed
It makes rotating motion around pump shaft 12；Wherein, pump shaft 12 can be fixedly installed relative to outer housing 2, can also revolve relative to outer housing
Transhipment is dynamic, and when pump shaft 12 makes rotating motion, impeller 11, pump shaft 12 and rotor 13 are fixedly connected with (as shown in figure 12), pump shaft
12 it is rotatable be supported on outer housing 2, for example one end is supported in first shell 21, and one end is supported on separation set 3；Work as pump
When axis 12 is fixedly installed relative to outer housing 2, rotor part 1 further includes an axle sleeve 14, and rotor 13 and impeller 11 are and axle sleeve
14 are fixedly connected, and pump shaft 12 includes first end 121 and second end 122, and first end 121 is arranged close to import 20, and first
End 121 is supported by first shell 21 to be arranged, and second end 122 is arranged far from import 20, and second end 122 is separated 3, set
Support setting；Axle sleeve 14 is fixedly installed with impeller 11 and rotor 13, and impeller 11 is arranged close to first end 121, and rotor 13 is close
Second end 122 is arranged；In the present embodiment, 3 fixed setting of second end 122 and separation set, in electronics pump work, stator department
The magnetic field force of part 8 and rotor assembly 1 acts on so that rotor 13 drives axle sleeve 14 and impeller 11 to rotate, and axle sleeve 14 is sheathed on pump shaft
12 outsides, and there is certain small fit-up gap between the inner surface of axle sleeve 14 and the outer surface of pump shaft 12, so that work is situated between
Matter can be filled between axle sleeve 14 and pump shaft 12, form lubricant layer.
It is as shown in Figure 1 to Figure 4 the electronic pump 100 of the first embodiment of the invention, as shown in Figure 1, axially stop block packet
Include: first bearing seat 41 and first bearing 51, first bearing seat 41 are fixedly connected with first shell 21, and first bearing 51 is set to
In first bearing seat 41, first bearing 41 can be ceramic material, not only can be improved wearability can also improve thermal conductivity and
Heatproof cold resistance；When the operating power of electronic pump 100 is smaller, axially stop block can be to include close to first end 122
The annular groove and open washer being set on pump shaft 12 can reduce the cost of components in this way, and then reduce electronic pump
Manufacturing cost.
Impeller 11 include front shroud of impeller 111, blade 112 and back shroud of impeller 113, front shroud of impeller 111 close into
Mouth 20 is arranged, and back shroud of impeller 113 is arranged far from import 20, and front shroud of impeller 111 and 112 top edge of blade are fixedly installed, leaf
It takes turns back shroud 113 and 112 lower edge of blade is fixedly installed, such as back shroud of impeller 113 can be integrated with blade 112 and be molded into
Shape, it is by riveting that impeller upper cover plate 111 and blade 112 is fixed.
Shown in Figure 3, front shroud of impeller 111 includes the guide part 111a and interconnecting piece 111b being wholely set, guide part
111a is used to import working media inside impeller 11, and interconnecting piece 111b is fixedly connected with 12 top edge of blade；Guide part 111a
Including from interconnecting piece 112 to the first protruding ring of 20 direction of import protrusion；The first protruding ring and pump shaft 12 of guide part 111a is same
Axis setting；Front shroud of impeller 111 further includes step 111c, and step 111c is set to the combination of guide part 111a and interconnecting piece 111b
Place, step 111c protrude certain altitude to 12 direction of pump shaft, and the end of guide part 111 is sharp-edged, and the angle of sharp-edged is less than or equal to
45 degree.
Referring to shown in Fig. 1 and Fig. 4, first shell 21 is provided with first annular groove 211, first annular groove 211 with lead
It is correspondingly arranged to portion 111a, first annular groove 211 and pump shaft 12 are coaxially disposed, the first protruding ring insertion of guide part 111a the
Inside one annular groove 21, and it is spaced apart between 211 inner wall of the outer edge of the first protruding ring and first annular groove,
The first gap is formed, the first gap can be connected to low-pressure area 311 and higher-pressure region 312；In present embodiment, axial force balance structure
For first axial force balanced structure, first axial force balanced structure includes guide part 11a and the first ring that first shell 21 is arranged
Connected in star 211, and guide part 111a is inserted into first annular groove 211, and forms the first communication gap；First be arranged in this way
Axial force balance structure can make the upper surface and first shell 21 positioned at front shroud of impeller 111 when electronic pump 100 works
Working media between inner surface is obstructed when flowing to 20 region of import, so that acting on 111 upper surface of front shroud of impeller
Pressure reduce relatively slow, do so the pressure to 20 opposite direction of import for 111 upper surface of front shroud of impeller relative to not
Be arranged first axial force balanced structure compared to can increased, and act on back shroud of impeller 113 to 20 direction of import
Pressure is constant, in this way reduces the active force resultant force that impeller 11 pushes 20 direction of import to, it is possible to reduce to axially stop block
Abrasion improves the service life of electronic pump 100.
First gap includes first axis gap 211a and the first radial clearance 211b, and first axis gap 211a is guidance
Gap between at the top of portion 111a and 211 bottom of first annular groove, the first radial clearance 211b refer to guide part 111a with
Gap between 211 side wall of first annular groove；First radial clearance 211b should be ensured that guide part 111a when assembly
It can be smoothly inserted into first annular groove 211, can't be collided, while the first radial clearance 211b is greater than wheel nose lid
0.004 times of maximum external profile diameter is less than or equal to 0.02 times of wheel nose lid outer rim maximum external profile diameter, guarantees that first is radial
Gap 211b plays the role of current limliting；When guaranteeing electronics pump work, the top of guide part 111a will not be with first annular groove 211
Bottom generates contact, and first axis gap 211a is as small as possible.
In the present embodiment, the height of projection of step 111c is more than or equal to the distance in the first gap, passes through the first gap in this way
Working media be obstructed again at step 111c, can preferably prevent the pressure of the upper surface of front shroud of impeller 111 from reducing,
The pressure for further decreasing axially stop block reduces the abrasion of axially stop block；In the present embodiment, the first gap can be protected
Demonstrate,prove the smoothly insertion first annular groove 211 of guide part 111, in electronics pump work, guide part 111a and first annular groove 211
Inside do not collide；First shell 21 includes first annular side wall 212 and the second annular sidewall 213, first annular side 212
Wall is arranged close to pump shaft 12, and the second annular sidewall 213 is arranged far from pump shaft 12, first annular side wall 212 and the second annular sidewall
213 form first annular groove 211, and first annular side wall 212 is cantilever design, the free end of first annular side wall 212 and platform
The upper surface of rank 111c is spaced apart, forms the second gap；The shape and guide part of the bottom of first annular groove 211
The structure of the end 111a sharp-edged matches, while carrying out chamfering setting to the bottom of first annular groove 211, can prevent in this way
It generates stress to concentrate, guarantees the intensity of impeller cavity upper housing 2；It is provided with guide part 111a and the first annular groove portion of sharp-edged
211 cooperation when, the flow resistance of working media can obviously increase, with the end guide part 111a be the straight angle structure compared with,
In the case where equivalent effect, the distance in the first gap more not only can facilitate guide part 111a and first annular groove
The assembling in portion 211, while can prevent front shroud of impeller 111 from generating interference with first shell 21 in the running.
The electronic pump 200 of second embodiment of the invention is referring to shown in Fig. 5 to Fig. 9, compared with first embodiment, mainly
Difference is: axial force balance structure is the second axial force balance structure, the setting of the second axial force balance structure in the present embodiment
In on back shroud of impeller 113 or being set on back shroud of impeller 113 and second shell 22；Second axial force balance structure includes
Through the relief hole 131 of back shroud of impeller 113, relief hole 131 passes through for being connected to area of low pressure 311 and higher pressure region 313
The pressure in 131 higher pressure region 313 of relief hole reduces, and does so the axis to 20 direction of import on back shroud of impeller 113
It is reduced to thrust, friction of the axle sleeve 5 to axially stop block can be weakened, extend the service life of product；Relief hole 131 is as far as possible
Close to the center of back shroud of impeller 113, and the peripheral distribution along the pump shaft hole that back shroud of impeller 113 is arranged；Aperture 113 is set
Be placed in adjacent blades starting point 112a line and adjacent blades starting point 112a and 13 line of centres of back shroud of impeller and
In the region that impeller mounting hole outer rim is constituted；Specifically, the circumference that multiple apertures 113 are formed and the leaf close to the pump shaft
The starting point 112a of piece is tangent (as shown in Figure 7), and the relief hole 131 being distributed in this way can make height where rotor 13 to greatest extent
Pressure area is connected to the low-pressure area where import 20, can quickly reduce the pressure of higher-pressure region；Pressure leak process is to import step simultaneously
The flow tendency of medium influences smaller.
It is shown in Figure 7, relief hole 131 include be circumferentially arranged along the back shroud of impeller 13 it is multiple through impeller rear cover
The aperture 131a of plate 113, aperture 131a at least two, and be symmetrical arranged, so that 113 stress balance of back shroud of impeller；This reality
It applies in example, the quantity of aperture 131a is less than or equal to the quantity of blade 112, and aperture 131a is circumferential equidistant along back shroud of impeller 113
Distribution, the distance at the center each aperture 131a to 113 center of back shroud of impeller is identical, the centre distance phase of adjacent apertures 131a
Together, manufacturing tolerance is less than 5%；In the present embodiment, rotor 13 is set in 8 inner cavity of stator component, in order to lean on relief hole 131 more
It is recessed to be circumferentially formed with the second annular along rotor 13 after the impeller for the center of nearly back shroud of impeller 13 between cover board 113 and rotor 13
Slot 71 (as Figure 1 and Figure 4), so that the area of low pressure of import 20 passes through the aperture 131a and rotor through back shroud of impeller 113
High-pressure area connection where 13；It certainly, can be with without carrying out processing groove 71 when stator component 8 is set to 13 inner cavity of rotor
Reach same effect.
The diameter of 13 outer rim of back shroud of impeller is D2, and the diameter of aperture 131a is d, and the diameter d of aperture 131a is more than or equal to
The 0.04 of 0.01 times and the diameter D2 less than or equal to the back shroud of impeller of the diameter D2 of 13 outer marginal circumference of back shroud of impeller
Times, the first distance at 13 center of aperture 131a centre distance back shroud of impeller is R, and first distance R is more than or equal to back shroud of impeller
0.5 times of 0.05 times and the diameter D2 less than or equal to back shroud of impeller outer rim of the diameter D2 of 13 outer rims；What is be arranged in this way lets out
Pressure hole 131 can guarantee that the pressure in higher pressure area 313 is discharged to low-pressure area, while can reduce the injection of water flow, to neighbouring stream
The influence of field reduces.
In the present embodiment, the second axial force balance structure not only includes relief hole 131, can also include the second protruding ring
132, the second protruding ring 132 is set on back shroud of impeller 113, and close to outlet 30 and raised towards 20 opposite direction of import；The
The free end of two protruding rings 132 is sharp-edged structure, and the angle of the sharp-edged is less than or equal to 45 degree.
The height of projection h of protruding ring 132 is more than or equal to 0.02 times of 13 external profile diameter D2 of back shroud of impeller less than or equal to leaf
0.2 times for taking turns 13 external profile diameter D2 of back shroud；For usually used electronic pump, height of projection h is more than or equal to 1 millimeter.
Second shell 22 corresponds to the second protruding ring 132 and is provided with third annular groove 31, third annular groove 31 and pump
Axis 12 is coaxially disposed；Second protruding ring 132 can be inserted in third annular groove 31, and second protruding ring 132 and described
It is spaced apart between third annular groove 31, the second gap is formed, flows working media by the second gap；It is logical
It crosses the second protruding ring 132 being correspondingly arranged and third annular groove 31 plays throttling action, back shroud of impeller 113 can be made
Pressure sharply declines, shown in Figure 9, compared with the case where relief hole 131 (as shown by curve 1) is separately provided, sets simultaneously
It sets relief hole 131 and the second protruding ring 132 and 31 structure of third annular groove (as shown by curve 2) acts on back shroud of impeller
113 axial thrust is smaller (the cartographic represenation of area axial thrust below curve), because recessed in the second protruding ring 132 and third annular
31 joint of slot, pressure, which will appear, sharply to be declined, and the area under such pressure curve significantly reduces, corresponding axial thrust drop
It is low.
Second gap includes the second axial gap 31a and the second radial clearance 31b, the second radial clearance 31b is second convex
The gap between 31 side wall of 132 side wall of ring and third annular groove is played, the second axial spacing 31b is 132 top of the second protruding ring
Gap apart from 31 bottom of third annular groove, the second radial clearance 31b is greater than 113 external profile diameter D2's of impeller rear end cap
0.004 times is less than or equal to 0.02 times of 113 external profile diameter of impeller rear end cap；When second axial gap 31b guarantees electronics pump work,
Second protruding ring, 132 top and the bottom of third annular groove 31 do not collide, and gap is small as far as possible.
As shown in fig. 6, distance of 132 inner wall of the second protruding ring apart from 113 center of back shroud of impeller is greater than in relief hole 131
Distance of the heart apart from 132 center of back shroud of impeller, such relief hole 131 are located in the space that the second protruding ring surrounds, pressure release effect
Fruit is obvious；The diameter of a circle that the outer wall of second protruding ring 132 is formed is more than or equal to what 113 outer edge of back shroud of impeller was formed
0.8 times of diameter of a circle, while the diameter of a circle that the outer wall of the second protruding ring 132 is formed is less than or equal to back shroud of impeller 113
The diameter of a circle that outer edge is formed.
Third embodiment of the invention electronic pump 300 is as shown in Figure 9 and Figure 10, electronic pump 300, axial force balance structure packet
Include the first protruding ring 111a and first annular groove 21 and the first gap, the second protruding ring 132 and second annular groove 31 with
And second gap and relief hole 131；In this way, acting on the pressure increase of front shroud of impeller upper surface, impeller rear cover is acted on
The pressure of plate lower surface is reduced, so that reducing to the resultant force of the axial thrust in import direction, reduces the abrasion of axially stop block,
Improve life of product；In the present embodiment, front shroud of impeller is identical as back shroud of impeller outside diameter, the first gap and the second gap
Spacing can be identical so that it is convenient to fabricate.
As shown in figure 12, compared with third embodiment, the main distinction exists the 4th kind of embodiment electronic pump 400 of the present invention
In: rotor part 1 does not include bearing 14, and rotor 7 and impeller 11 are fixedly connected with pump shaft 12, and pump shaft 12 does rotation fortune with rotor
It is dynamic, and impeller 11 rotates, 12 both ends of pump shaft in first shell 21 and are separated on set 3 by bearing support.
It should be understood that above embodiments are merely to illustrate the present invention and not limit technical side described in the invention
Case, although this specification is referring to the above embodiments, the present invention has been described in detail, the common skill of this field
Art personnel should be appreciated that person of ordinary skill in the field still can modify or equivalently replace the present invention, and
All do not depart from the technical solution and its improvement of the spirit and scope of the present invention, should all cover in scope of the presently claimed invention
It is interior.
Claims (10)
1. a kind of electronic pump, including first shell, separation set, second shell, rotor part and stator component；Described first,
Second shell forms the inner cavity of the electronic pump, and the inner cavity of the electronic pump is divided into wet chamber and dry chamber, institute by the separation set
It states rotor part and is set to the wet chamber, the stator component is set to the dry chamber, and the wet chamber is provided with inlet and outlet,
The rotor part includes impeller, and the impeller includes blade and back shroud of impeller；The back shroud of impeller and the blade are solid
Fixed setting；It is characterized by: when the electronics pump work, the wet chamber includes the low-pressure area that can be connected to, higher-pressure region and higher
Pressure area, the low-pressure area and the inlet communication, the higher-pressure region and the outlet, the higher pressure area includes the leaf
Take turns the part wet chamber below back shroud；The electronic pump further includes an axially stop block, and the axially stop block is used
In limiting the impeller since pressure imbalance to the axial movement in the import direction is no more than preset distance；The electronic pump
It further include axial force balance structure, the axial force balance structure includes the relief hole through back shroud of impeller setting；Institute
It states relief hole and is connected to the low-pressure area and the higher pressure area；The axial force balance structure further includes that the back shroud of impeller is set
The protruding ring and the annular groove for separating set setting set, the protruding ring is set on the back shroud of impeller and direction
The import is reversely raised, and the protruding ring is inserted into the annular groove inner cavity, the outer surface of the protruding ring and the annular
It is spaced apart between groove inner wall, form gap；The free end of the protruding ring is arranged to sharp-edged, and the sharp-edged is to pass through
It carries out chamfering in the protruding ring to be formed, the angle of the chamfering is less than or equal to 45 degree, and the protruding ring inner wall is apart from the leaf
Take turns the distance at the center of back shroud of impeller described in the centre distance of the distance greater than the relief hole at the center of back shroud.
2. electronic pump according to claim 1, it is characterised in that: the relief hole includes at least two apertures, described small
Hole is distributed about the central symmetry of the back shroud of impeller, and the quantity of the aperture is less than or equal to the quantity of the blade.
3. electronic pump according to claim 2, it is characterised in that: the aperture equidistantly distributed, in the adjacent aperture
The heart is identical with the phase angle that the back shroud of impeller line of centres is constituted, impeller described in the centre distance of each adjacent apertures
The distance at the center of back shroud is identical.
4. electronic pump according to claim 3, it is characterised in that: the back shroud of impeller is provided with impeller mounting hole, institute
It states aperture to be arranged as close as possible to the impeller mounting hole, each aperture is set to the starting point line and phase of adjacent blades
In the region that adjacent blade starting point and the back shroud of impeller line of centres and the impeller mounting hole outer rim are constituted.
5. electronic pump according to claim 2, it is characterised in that: the diameter of the back shroud of impeller is D2, the aperture
Diameter be d, the diameter d of the aperture is more than or equal to 0.01 times of the diameter D2 of the back shroud of impeller and is less than or equal to institute
0.08 times for stating the diameter D2 of back shroud of impeller, first distance of the small hole center apart from the back shroud of impeller center are R,
After the first distance R is more than or equal to 0.05 times of the diameter D2 of the back shroud of impeller outer rim and is less than or equal to the impeller
0.25 times of the diameter D2 of cover board.
6. electronic pump according to claim 1, it is characterised in that: the impeller includes front shroud of impeller, before the impeller
Cover board includes guide part and step, and the guide part includes the first protruding ring, and the rotor part includes pump shaft, the first shell
Body includes first annular side wall and the second annular sidewall, and the first annular side wall and second annular sidewall form the first ring
Connected in star, it is spaced apart between the outer edge of first protruding ring and the first annular groove inner wall, form first
Gap, the step protrude certain altitude to the pump shaft direction, and the height of projection of the step is more than or equal between described first
The distance of gap.
7. electronic pump according to claim 1, it is characterised in that: the height of projection of the protruding ring is more than or equal to the leaf
0.02 times for taking turns back shroud external profile diameter D2, less than or equal to 0.2 times of the back shroud of impeller external profile diameter D2.
8. electronic pump according to claim 1, it is characterised in that: the diameter D1 for the circumference that the outer wall of the protruding ring is formed
More than or equal to 0.8 times of the diameter D2 of the circumference of back shroud of impeller outer edge formation, while the outer wall of the protruding ring is formed
Circumference diameter D1 be less than or equal to the back shroud of impeller outer edge formed circumference diameter D2.
9. electronic pump according to claim 5, it is characterised in that: the gap is to include between radial clearance and axial direction
Gap, wherein the radial clearance is the distance between the annular protrusion side wall and the annular groove side wall, between the axial direction
Gap is the distance of annular groove bottom described in the annular protrusion distance from top, and the radial clearance is greater than the impeller rear end
0.004 times of lid external profile diameter is less than or equal to 0.02 times of the impeller rear end cap external profile diameter.
10. electronic pump according to claim 1-8, it is characterised in that: the rotor assembly is set to described fixed
In sub-component inner diameter volume, the rotor and the impeller integrated injection molding, in the rotor and the leaf on the rotor
The faying face of wheel back shroud is provided with a second annular groove, and the region on the back shroud of impeller top and second annular are recessed
Region where slot is connected to by the relief hole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410495854.1A CN105443397B (en) | 2014-09-24 | 2014-09-24 | Electronic pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410495854.1A CN105443397B (en) | 2014-09-24 | 2014-09-24 | Electronic pump |
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| Publication Number | Publication Date |
|---|---|
| CN105443397A CN105443397A (en) | 2016-03-30 |
| CN105443397B true CN105443397B (en) | 2019-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410495854.1A Active CN105443397B (en) | 2014-09-24 | 2014-09-24 | Electronic pump |
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| CN (1) | CN105443397B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784233B (en) * | 2016-03-31 | 2019-06-21 | 上海交通大学 | The test device and method of axial compressive force stream and circumferential shear flow reciprocal effect clearance flow dynamic resistance to each other |
| CN109162958A (en) * | 2018-10-31 | 2019-01-08 | 芜湖飞龙汽车电子技术研究院有限公司 | A kind of electronic water pump for automobile flow blocking mechanism |
| CN113958497A (en) * | 2020-07-21 | 2022-01-21 | 博利源科技(南京)有限公司 | Front cover structure of shaftless magnetic drive pump |
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| CN103080557A (en) * | 2011-02-10 | 2013-05-01 | 三菱重工业株式会社 | Pump configuration |
| CN203257732U (en) * | 2013-04-12 | 2013-10-30 | 上海阿波罗机械股份有限公司 | Impeller for residual heat removal pump |
| JP2014047748A (en) * | 2012-09-03 | 2014-03-17 | Tsurumi Mfg Co Ltd | Impeller for water pump |
| CN203783959U (en) * | 2014-01-08 | 2014-08-20 | 陈亚波 | Axial force balancing mechanism for magnetic pump impeller |
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| CN1779275A (en) * | 2004-11-19 | 2006-05-31 | 上海东方泵业(集团)有限公司 | Improved axial force balancing structure of shielded pump |
| CN103080557A (en) * | 2011-02-10 | 2013-05-01 | 三菱重工业株式会社 | Pump configuration |
| CN103075351A (en) * | 2011-10-26 | 2013-05-01 | 现代自动车株式会社 | Electric water pump with a canned motor |
| CN102606534A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Waste heat discharge pump for nuclear power plant |
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| Publication number | Publication date |
|---|---|
| CN105443397A (en) | 2016-03-30 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20170509 Address after: 310018 No. 301, No. 12, Hangzhou economic and Technological Development Zone, Zhejiang Province Applicant after: Zhejiang Sanhua Automobile Components Co., Ltd. Address before: 310018 289-2, Hangzhou economic and Technological Development Zone, Zhejiang, No. 12 Applicant before: Hangzhou Sanhua Institute Co., Ltd. |
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