CN101619725A - Pump apparatus - Google Patents
Pump apparatus Download PDFInfo
- Publication number
- CN101619725A CN101619725A CN200910159454A CN200910159454A CN101619725A CN 101619725 A CN101619725 A CN 101619725A CN 200910159454 A CN200910159454 A CN 200910159454A CN 200910159454 A CN200910159454 A CN 200910159454A CN 101619725 A CN101619725 A CN 101619725A
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- China
- Prior art keywords
- impeller
- pump
- axle
- annular knurl
- axial region
- 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.)
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Links
- 238000003780 insertion Methods 0.000 claims abstract description 37
- 230000037431 insertion Effects 0.000 claims abstract description 37
- 239000002184 metal Substances 0.000 claims description 41
- 238000005192 partition Methods 0.000 claims description 33
- 230000004323 axial length Effects 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims 2
- 230000004888 barrier function Effects 0.000 abstract 2
- 238000007789 sealing Methods 0.000 description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 208000037656 Respiratory Sounds Diseases 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 210000002445 nipple Anatomy 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical group C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 4
- 230000035515 penetration Effects 0.000 description 4
- 230000003746 surface roughness Effects 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A pump apparatus is capable of improving sealability between an oil seal and a linking tube part of an impeller contacting to the oil seal. The pump has a housing (2), where a pump casing (6) of the housing (2) for containing the impeller (60) and a motor casing (5) for accepting a motor (M) is divided by a shaft support barrier wall (10), so that a necked-in part (65a) of the linking tube part (65) of the impeller passes through the oil seal (20) arranged on the shaft support barrier wall (10), and annular knurl (42) formed on a shaft (40) of the motor (M) is pressed into a shaft insertion hole (62) of the linking tube part (65), further the motor (M) is connected with the impeller (60), the annular knurl (42) is more close up the motor casing (5) than a slide contact point (24a) between a lip rim (24) of the oil seal (20) and the necked-in part (65a) of the linking tube part (65) on a pressing-in position in the shaft insertion hole (62).
Description
Technical field
The present invention relates to be characterised in that the pump-unit of impeller and the combined structure of axle.
Background technique
Fluid pump device as the suction fluid for example has disclosure in patent documentation 1.
Fig. 3 is the major component enlarged view of the disclosed fluid pump device of patent documentation 1.
In the disclosed fluid pump device of patent documentation 1, utilize partition 101 that body shell 100 is divided into motor casing 110 and pump casing 120, the motor 111 that utilization is arranged in the motor casing 110 comes impeller 130 rotations of driving device in the pump casing 120 that comprises suction port 121 and exhaust port (not shown), thereby suck fluid from suction port 121, and fluid is discharged from exhaust port.
Patent documentation 1: the Japan Patent spy opens the 2001-090685 communique
The axle 112 of motor 111 is arranged to run through partition 101 and is extended to pump casing 120 sides, is pressed into by the front end that will be formed with annular knurl 113 in the shaft insertion hole that constitutes on the cylinder axial region 131 of impeller 130 and combines with impeller 130.
In order to improve the sealing of oil sealing 140 and 131 of the cylinder axial regions that contacts this oil sealing 140, need to strengthen the concentric circularity and the surface roughness of cylinder axial region 131 herein.
But, because therefore cylinder axial region 131 direct contact seals 140 are difficult to improve surface roughness and improve sealing.
Summary of the invention
The objective of the invention is to improve the sealing between the shaft of the impeller of oil sealing and contact seal in the pump-unit.
Pump-unit of the present invention has body shell, the pump casing of taking in impeller of this body shell is divided by partition with the motor casing of taking in motor, make the cylinder axial region of impeller run through the sealed member that partition is provided with, and will be formed on motor the axle on annular knurl be pressed in the shaft insertion hole that constitutes on the cylinder axial region, thereby motor is connected with impeller, annular knurl in the cylinder axial region be pressed into the position axle axially on than the contacting part more close motor casing side of cylinder axial region with sealed member.
Herein, the axial region of cylinder at least that comparatively it is desirable to impeller utilizes resin material to form, and metal cylinder part is set on the outer circumferential face of cylinder axial region, and cylinder axial region and cylinder part are formed one.
In addition, comparatively it is desirable to cylinder part axle axially on the position relative with annular knurl towards the radially inner side bending.
In addition, comparatively it is desirable to, impeller side on axle, annular knurl is provided with guiding element, and this guiding element inserts the shaft insertion hole that constitutes on the cylinder axial region.
In addition, comparatively it is desirable to annular knurl and be positioned at the space that utilizes partition to separate with the pump casing water-stop with sealed member.
According to the present invention, since annular knurl be pressed into the position axle axially on than the contacting part more close motor casing side of cylinder axial region with sealed member, therefore, also can suppress to be out of shape the influence that the sealing to sealed member causes even on the outer circumferential face of cylinder axial region, produce distortion because of annular knurl is pressed into shaft insertion hole.
Description of drawings
Fig. 1 is the sectional view of the related pump-unit of mode of execution.
Fig. 2 is near the related impeller of the mode of execution amplification view with the connecting part of axle.
Fig. 3 is near the related impeller of the conventional example amplification view with the connecting part of axle.
(symbol description)
1 pump-unit
2 housings
3 first housings
4 second housings
5 motor casings
6 pump casings
10 support partitions
12 outer teats
14 disc portions
15 shaft sleeve part
16 oil sealing holding parts
17 wide diameter portions
18 portions
20 oil sealings (sealed member)
23 lip limits
24 lip limits
24a sliding contact point
40
41 introduction parts
42 annular knurls
60 impellers
62 shaft insertion holes
63 blades
65 in conjunction with tube portion (cylinder axial region)
The 65a diameter reducing part
The 65b wide diameter portion
90 metal cylinder (cylinder part)
The 90a lip part
90b fastening portion
The M motor
The S seal space
Embodiment
Then, the mode of execution of using pump-unit of the present invention is described.
Fig. 1 is the longitudinal section of the unitary construction of expression mode of execution.
Pump-unit 1 is formed by pump P, the motor M that drives this pump P.
The housing 2 of pump-unit 1 is formed by motor casing 5, pump casing 6.
First housing 3 is the cylinder shape that the end is arranged that comprises periphery wall 3a, and its opening portion is supported partition 10 by axle and covers, and forms motor casing 5.In addition, the axle support partition 10 and second housing 4 form pump casing 6.That is, an axle support partition 10 is that two shells are publicly-owned, and it is relative and be bonded to each other to make first housing 3 and second housing 4 clip a support partition 10.
The bayonet socket mode of said first shell 3, second housing 4 and axle support partition 10 these three parts pawl by using a plurality of positions that make progress in week successively links (bayonet engagement), and realizes spline with bolt etc.In addition, also can utilize many bolts, nut etc. with the combination simultaneously of three parts.
In addition, support partition 10 from axle and in motor casing 5, extend a portion 18.Tube portion 18 is connected with shaft sleeve part 15 by the wide diameter portion 17 of its root.
The end of outstanding axle 40 is combined with cylinder 34 in from the front end of tube portion 18 towards motor casing 5, and this cylinder 34 makes barrel 35 be positioned at the outside of stator 30.On the internal surface of the barrel 35 of cylinder 34, permanent magnet 36 is installed by bonding grade, the inner peripheral surface of permanent magnet 36 set for and the outer circumferential face of stator 30 between separate specified gap.These cylinders 34, permanent magnet 36 and axle 40 have formed rotor 33.
On the other hand, pump P is by constituting at the wide diameter portion 17 that supports partition 10 from axle outstanding axle 40 installations impeller 60 described later in the pump casing 6.
The interior week of second housing, 4 its sidewall 4a is cylindrical, and its opening end is chimeric with the periphery wall 13 of the outer teat 12 of axle support partition 10 by nested mode.Second housing 4 is provided with seal ring 7 with the chimeric surface of periphery wall 13.
The diapire 4b of second housing 4 supports partition 10 from axle to be separated, and the elongation line along axle 40 on this diapire 4b is provided with water sucking mouth 8, and sidewall 4a is provided with drain opening 9.Thus, 8 water that flow into are discharged from the drain opening 9 towards the top by the effect of the impeller 60 that rotated by motoring from the water sucking mouth.
The bearing 26 of back shaft 40 is oil-containing sliding bearings cylindraceous, disposes the end that the makes penetration hole 19 bearing holding part 49 with spot-facing shape enlarged-diameter in the root side of tube portion 18.The bearing 27 of tube portion forward end too.
In addition, the side in motor casing 5 that supports partition 10 at axle is formed with passage 80, is formed with the straight hole 81 of an end towards seal space S opening, the other end towards the outer openings of motor casing 5 in passage 80.This straight hole 81 uses slide core to form simultaneously when axle supports the moulding of partition 10.
As shown in Figure 1, the outboard end of passage 80 is set the periphery wall 3a butt with first housing 3 for.The position of periphery wall 3a with passage 80 butts be formed with passage in the breach 83 of straight hole 81 coupling.Thus, seal space S is via straight hole 81 and breach 83 and motor casing 5 external communications.That is, these straight holes 81 and breach 83 have formed draining road D.
For draining road D, under the state that is provided with of pump-unit 1, straight hole 81 is at the bottommost opening of seal space S, towards gravitational direction.
Utilize this draining road D, even the water that bleeds via oil sealing 20 from pump casing 6 sides is desired to accumulate in the seal space S, can immediately it be discharged towards outside yet, therefore, bearing 26 can not be immersed in the ponding.In addition, because draining road D directly discharges water with independent paths towards outside, therefore the situation that water enters the space of the joint of accommodating coil distribution, coil distribution and wiring connector apparatus halfway can not take place yet.
In addition,, therefore can directly observe and confirm axle 40,, also can measure the rotating speed and the runout of axle 40 by irradiating laser even after the pump-unit assembling from outside because draining road D is a straight line.
Promptly, when measuring rotating speed, only need on the circumferential part of axle 40 the different parts of reflection characteristic to be set in advance or setting makes the different plane of inclination of reflection angle, perhaps upwards be provided with in week concavo-convex or changing surface roughness, the pace of change of detection of reflected light intensity gets final product.
In addition, when measuring runout, only need on the whole circumference of axle 40 or on circumferentially reflection part is being set equally spaced in advance, detection of reflected light to the variable in distance of reflection part gets final product.
Below the combined structure of impeller 60 with axle 40 described.
Fig. 2 is near impeller 60 amplification view with the connecting part of axle 40.
Form diameter reducing part 65a in conjunction with the reduced of axle support partition 10 sides of tube portion 65, on the outer circumferential face of diameter reducing part 65a, be fixed with columnar metal cylinder 90.Covered by metal cylinder 90 in the outer circumferential face of the diameter reducing part 65a roughly gamut in the axial direction.
One distolateral (blade 63 sides) of metal cylinder 90 form lip part 90a towards the radial outside bending, and lip part 90a and near metal cylinder 90 thereof are imbedded in the wide diameter portion 65b of combination tube portion 65.
Another of metal cylinder 90 distolateral axle 40 axially on clip on the relative position of diameter reducing part 65a and annular knurl described later 42, form the 90b of fastening portion towards (radially inner side) bending of annular knurl 42 sides, the front end of the 90b of fastening portion is imbedded diameter reducing part 65a.
The 90b of fastening portion be the pressing part that prevents diameter reducing part 65a when being pressed into shaft insertion hole 62 described later at annular knurl 42 towards radial outside be out of shape significantly, the end diameter of shaft insertion hole 62 enlarges and be provided with.
In addition, the dogleg section 90c of metal cylinder 90 is to form the form bending of curved surface in the end of motor casing 5 sides of metal cylinder 90, therefore, with introduction part 41 and annular knurl 42 insertion shaft insertion holes, 62 combination axles 40 and impeller 60 time, prevent that the lip limit 23,24 of oil sealing 20 is impaired because of the dogleg section 90c of metal cylinder 90.
In the present embodiment, metal cylinder 90 is for example formed by SUS304 (JIS), and metal cylinder 90 and impeller 60 are for example by the molded one that forms.
Be formed with the oil sealing holding part 16 of pump casing 6 side openings on right side in the figure on axle supports the shaft sleeve part 15 of partition 10, its diapire is the butting section 16a with oil sealing 20 butts.Oil sealing holding part 16 is arranged to separate the outer circumferential face encirclement that predetermined distance will be set in the metal cylinder 90 on the diameter reducing part 65a, and the inner peripheral surface of facing metal cylinder 90 is provided with oil sealing 20.
The elastomer lip limit 23,24 that the pedestal part 22 that oil sealing 20 is formed by moulding elastomer on the L-shaped metal ring 21 in the cross section of for example SUS304 (JIS) system, the state that separates with the elastomer with pedestal part 22 engage with the outer circumferential face of metal ring 21 constitutes.
Oil sealing 20 by pedestal part 22 is pressed into, makes its front end elasticity be pressed into to butting section 16a butt, and be positioned in the oil sealing holding part 16, make metal cylinder 90 sliding contacts of the outer circumferential face of its lip limit 23,24 and diameter reducing part 65a.
The inner circle wall 22a of pedestal part 22 tilts, and it is more little to leave then diameter far away more from butting section 16a.
Oil sealing 20 is pressed on the metal cylinder 90 and guarantees sealing by the elastic member (lip limit 23,24) that oil sealing 20 is had, and from axially observing, the contacting part that lip limit 23,24 and metal cylinder are 90 is all rounded.
On the axle 40 of motor M, be formed with introduction part 41 and annular knurl 42 successively from forward end (blade 63 sides).
Thus, impeller 60 becomes the one-sided support structure that only has motor side to be maintained.
In the present embodiment, axle 40 insert in the shaft insertion holes 62 insertion length L 1 greater than the axial length L of shaft insertion hole 62 half and be inserted into blade 63 sides, be configured to the length that can prevent that impeller 60 from rocking.
In addition, the axial length L 2 of introduction part 41 is configured to bring into play effect that leading axle 40 moves along the rotating shaft O of impeller 60, prevents that the axle 40 rotating shaft O with respect to impeller 60 are tilted the length that is pressed into, is configured to the axial length L 3 long a lot of length than annular knurl 42 when annular knurl 42 is pressed into shaft insertion hole 62.
But the axial length L 3 of annular knurl 42 is configured to have can be with axle 40 and impeller 60 length with the adhesive strength of the form combination of one rotation.
Even this is that the stress radially along diameter reducing part 65a works when being pressed into shaft insertion hole 62 for annular knurl 42, on the outer circumferential face of metal cylinder 90 (diameter reducing part 65a), produce strain, can prevent that also strain from having influence on sliding contact point 24a, thus, the sealing between maintenance oil sealing 20 and the metal cylinder 90 (diameter reducing part 65a).
The back side of impeller 60 also be provided with sky open that the state of certain intervals will surround in conjunction with the outer circumferential face of the wide diameter portion 65b of tube portion 65, to be the ring wall 67 at center in conjunction with tube portion 65, ring wall 67 extends to the position of the diameter reducing part 65a that combines tube portion 65 in the axial direction abreast with the outer circumferential face of wide diameter portion 65b.
In addition, the shaft sleeve part 15 that supports the outer teat 12 of partition 10 from axle is extended the ring wall 69 of front-end face between ring wall 67 and wide diameter portion 65b.Be formed with the recess 70 of ring-type outside in the disc portion 14 of teat 12 with the form of the front end of the ring wall 67 of admitting impeller 60 outer circumferential sides.
These ring walls 67,69, recess 70, wide diameter portion 65b have formed labyrinth sealing, prevent that current from directly influencing oil sealing 20 parts.
In the pump-unit 1 that constitutes as mentioned above, annular knurl 42 be pressed into the position the axle 40 of motor M axially on leave predetermined distance X from the sliding contact point 24a between the lip limit 24 of oil sealing 20 and the metal cylinder 90 of impeller 60 (diameter reducing part 65a) towards motor casing 5 sides.
Therefore, even produce deformation because of being pressed into of annular knurl 42 makes metal cylinder 90, deformation also can directly not influence the sliding contact point 24a of 90 of lip limit 23,24 and metal cylinder, can not diminish the sealing of oil sealing 20.
In addition, columnar metal cylinder 90 is set on diameter reducing part 65a, and axle 40 be inserted in the part in the shaft insertion hole 62, form annular knurl 42 than a side of the more close motor casing 5 of sliding contact point 24a between oil sealing 20 and diameter reducing part 65a, part before the annular knurl 42 is formed the external diameter introduction part 41 slightly littler than the internal diameter of shaft insertion hole 62, therefore, need not increase the axial extent of impeller 60 and axle 40 bound fraction (combine tube portion 65), just can form guaranteed sealing spool with the combined structure of impeller.
As mentioned above, in mode of execution, pump-unit has housing 2, the pump casing of taking in impeller 60 6 of this housing 2, taking in the motor casing 5 of motor M is divided by axle support partition 10, with impeller 60 in conjunction with the diameter reducing part 65a of tube portion 65 to run through the state setting of an oil sealing that support partition 10 is provided with 20, and the annular knurl 42 of axle on 40 that will be formed on motor M be pressed in conjunction with the shaft insertion hole 62 of tube portion 65 and motor M be connected with impeller 60, makes annular knurl 42 be pressed into lip limit 24 and more close motor casing 5 sides of the sliding contact point 24a between the diameter reducing part 65a that combines tube portion 65 than oil sealing 20 on axle 40 axial, position in shaft insertion hole 62.
Thus, even produce distortion, leave predetermined distance X owing to be pressed into the sliding contact point 24a of 24 of positions towards motor casing 5 sides, so also can prevent the deformation effect sealing from the lip limit of diameter reducing part 65a and oil sealing 20 because of being pressed into of annular knurl 42 makes diameter reducing part 65a.Therefore, the situation that sealing is affected, sealing descends of metal cylinder 90 and oil sealing 20 can not take place.
In addition, utilize resin material to form the 65a of diameter reducing part at least in conjunction with tube portion 65 of impeller 60 integral body or impeller 60, and columnar metal cylinder 90 is set on the outer circumferential face of diameter reducing part 65a, will form one with metal cylinder 90 in conjunction with tube portion 65 by molded.
The surface roughness of resin is relatively poor, because pore etc. are difficult to the cross section of diameter reducing part 65a is formed circle, but by on the periphery of resin part, columnar metal cylinder 90 being set with fixing mode, can constitute the sealed department of oil sealing 20 with low friction, higher circularity, sealing improves.
In addition, by metal cylinder 90 is formed one with diameter reducing part 65a,, can be the shape that the rigidity of diameter reducing part 65a keeps metal cylinder 90 also by the resin part even form the thickness of metal cylinder 90 thinner.
In addition, when utilizing resin material to form impeller 60 integral body, even complex-shaped impeller also can easily be made by ester moulding.Therefore, compare when forming impeller by the higher cutting of cost, can form impeller at an easy rate, compare when forming impeller by the punch process that is difficult to carry out complicated solid processing, can easily form complex-shaped impeller, compare when utilizing the surface treatment need carry out antirust usefulness or the metallic material that uses rust preventive material to form impeller, the manufacture process of impeller is simple, and can alleviate the weight of impeller self.
In addition, columnar metal cylinder 90 axle 40 axially on clip on the relative position of diameter reducing part 65a and annular knurl 42 and form the 90b of fastening portion towards the radially inner side bending, the front end of the 90b of fastening portion is imbedded diameter reducing part 65a.
Thus, when annular knurl 42 was pressed into shaft insertion hole 62, the diameter reducing part 65a that the 90b of fastening portion can suppress impeller 60 opened towards radial outside, therefore, can suppress the enlarged-diameter of shaft insertion hole 62 in the end of motor casing 5 sides of diameter reducing part 65a.
In addition, even, also can utilize the 90b of fastening portion to suppress the expansion of crackle because of being pressed on the diameter reducing part 65a of impeller 60 of annular knurl 42 cracks.
In addition, can improve the radial rigidity of the attachment portion of 42 of the diameter reducing part 65a of impeller 60 and axle 40 annular knurls, thereby form the combined structure of 60 in that the confining force of 40 pairs of impellers 60 of axle is improved, axle 40 and impeller.
In addition, the dogleg section 90c of metal cylinder 90 is shaped as curve form, and therefore, in conjunction with axle 40 during with impeller 60, the lip limit 23,24 that oil sealing 20 can not take place is because of the impaired situation of the dogleg section 90c of metal cylinder 90.
In addition, on axle 40, impeller 60 sides at annular knurl 42 are provided with the introduction part of inserting in conjunction with in the shaft insertion hole 62 of tube portion 65 41, introduction part 41 has the external diameter slightly littler than the internal diameter of shaft insertion hole 62, and the axial length L of introduction part 41 2 front end arrival of introduction part 41 when combining axle 40 with impeller 60 combines the length of the wide diameter portion 65b of tube portion 65.
Thus, when axle 40 is combined with impeller 60, can under the Centered state that makes rotating shaft (axle 40) and impeller 60, annular knurl 42 be pressed in the shaft insertion hole 62.Therefore, while needn't keep impeller 60 and rotating shaft (axle 40), can easily be pressed into annular knurl 42 so that it does not fall down to be pressed into annular knurl 42.
In addition, since the sliding contact point generation of 90 of the metal cylinder of the lip limit 23,24 that introduction part 41, therefore can not cause oil sealing 20 not with the pushing towards radial outside in conjunction with tube portion 65 of impeller 60 and diameter reducing part 65a be out of shape.
In addition, even the axial long L3 of annular knurl 42 is shorter, owing to be provided with introduction part 41, therefore also can guarantee to prevent waving of impeller to acting on the radially intensity of force of axle 40 and the bound fraction (combining tube portion 65) of impeller 60.
In addition, the axial length L 3 of annular knurl 42 is shorter, and it is less to be pressed into area, therefore, compares with the conventional example of the axle that is formed with annular knurl in the gamut that adopts the part in being inserted into shaft insertion hole 62, and power required when being pressed into is less.
Thus, even crack on the pressing part because of the diameter reducing part 65a that is pressed at impeller 60 of annular knurl 42, support the space S that partition 10, oil sealing holding part 16 and oil sealing 20 surround because pressing part is positioned at by axle, so water can not enter crackle yet.Therefore, if hypothesis has water to enter crackle, then when pump-unit was configured in the environment under the freezing point, the freezing expansion of moisture may cause crackle to enlarge in the crackle, but has prevented among the present invention that water from entering crackle, therefore such problem can not occur.
In the above-described embodiment, illustrative is the structure on whole surface of columnar metal cylinder 90 being arranged to cover the outer circumferential face of diameter reducing part 65a, but also can be only on the contact segment of the lip limit 23,24 of oil sealing 20 and diameter reducing part 65a metal cylinder be set.Identical effect in the time of also playing with above-mentioned mode of execution in this case.
Claims (7)
1. a pump-unit has body shell, and the pump casing of taking in impeller of this body shell and the motor casing of taking in motor are divided by partition, and described pump-unit is characterised in that,
Make the cylinder axial region of described impeller run through the sealed member that described partition is provided with, and will be formed on described motor the axle on annular knurl be pressed in the shaft insertion hole that constitutes on the described cylinder axial region, thereby described motor is connected with described impeller,
Described pump-unit comprises the combined structure of impeller and axle, this combined structure is characterised in that, described annular knurl in described cylinder axial region be pressed into the position described axle axially on than the more close described motor casing side of the contacting part of described cylinder axial region and described sealed member.
2. pump-unit as claimed in claim 1 is characterized in that,
At least the described cylinder axial region of described impeller utilizes resin material to form,
The outer circumferential face of described cylinder axial region is provided with metal cylinder part, and described cylinder axial region and described cylinder part formation one.
3. pump-unit as claimed in claim 2 is characterized in that, described cylinder part described axle axially on the position relative with described annular knurl towards the radially inner side bending.
4. pump-unit as claimed in claim 1, it is characterized in that, on described axle, be provided with the guiding element that inserts described shaft insertion hole in position than the more close described impeller side of described annular knurl, described guiding element forms the cylindrical shape with external diameter slightly littler than the internal diameter of described shaft insertion hole.
5. pump-unit as claimed in claim 4 is characterized in that the axial length of described guiding element is longer than the axial length of described annular knurl.
6. pump-unit as claimed in claim 5 is characterized in that,
At least the described cylinder axial region of described impeller utilizes resin material to form,
The outer circumferential face of described cylinder axial region is provided with metal cylinder part, and described cylinder axial region and described cylinder part formation one.
7. pump-unit as claimed in claim 1 is characterized in that, described annular knurl is positioned at the space that utilizes described partition to separate with described pump casing water-stop with described sealed member.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008175329 | 2008-07-04 | ||
| JP2008175329 | 2008-07-04 | ||
| JP2009079667 | 2009-03-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101619725A true CN101619725A (en) | 2010-01-06 |
Family
ID=41513099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910159454A Pending CN101619725A (en) | 2008-07-04 | 2009-07-03 | Pump apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5197462B2 (en) |
| CN (1) | CN101619725A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107917087A (en) * | 2017-12-14 | 2018-04-17 | 宁波利佳青石电气科技有限公司 | A kind of supercharging device for water cleaning systems |
| CN110617237A (en) * | 2018-06-19 | 2019-12-27 | 株式会社阿我妻 | Bearing seal and water supply pump |
| CN111042789A (en) * | 2019-12-19 | 2020-04-21 | 中石化四机石油机械有限公司 | Mixed discharging system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5111563B2 (en) * | 2010-06-01 | 2013-01-09 | 三菱電機株式会社 | Rotating electric machine |
| KR101086918B1 (en) | 2010-12-20 | 2011-11-29 | 대성전기공업 주식회사 | Hydrogen recirculation blower motor for fuel cell vehicle |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3769138B2 (en) * | 1999-01-22 | 2006-04-19 | 日本電産サンキョー株式会社 | Pump device |
| JP2000314395A (en) * | 1999-05-06 | 2000-11-14 | Terada Pump Seisakusho:Kk | Pump |
| JP3869625B2 (en) * | 2000-05-12 | 2007-01-17 | 日本電産サンキョー株式会社 | Pump device |
-
2009
- 2009-03-27 JP JP2009079667A patent/JP5197462B2/en not_active Expired - Fee Related
- 2009-07-03 CN CN200910159454A patent/CN101619725A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107917087A (en) * | 2017-12-14 | 2018-04-17 | 宁波利佳青石电气科技有限公司 | A kind of supercharging device for water cleaning systems |
| CN107917087B (en) * | 2017-12-14 | 2023-09-22 | 宁波利佳青石电气科技有限公司 | Supercharging device for water purification system |
| CN110617237A (en) * | 2018-06-19 | 2019-12-27 | 株式会社阿我妻 | Bearing seal and water supply pump |
| CN110617237B (en) * | 2018-06-19 | 2022-11-18 | 株式会社阿我妻 | Bearing seal and water supply pump |
| CN111042789A (en) * | 2019-12-19 | 2020-04-21 | 中石化四机石油机械有限公司 | Mixed discharging system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5197462B2 (en) | 2013-05-15 |
| JP2010031836A (en) | 2010-02-12 |
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