CN101619724A - Pump apparatus - Google Patents
Pump apparatus Download PDFInfo
- Publication number
- CN101619724A CN101619724A CN200910139832A CN200910139832A CN101619724A CN 101619724 A CN101619724 A CN 101619724A CN 200910139832 A CN200910139832 A CN 200910139832A CN 200910139832 A CN200910139832 A CN 200910139832A CN 101619724 A CN101619724 A CN 101619724A
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- Prior art keywords
- slip surface
- side slip
- fixed side
- bearing part
- pump
- Prior art date
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- 239000012530 fluid Substances 0.000 claims abstract description 49
- 239000007788 liquid Substances 0.000 claims abstract description 37
- 230000035515 penetration Effects 0.000 claims description 31
- 230000001002 morphogenetic effect Effects 0.000 claims description 6
- 238000005299 abrasion Methods 0.000 abstract description 13
- 239000000843 powder Substances 0.000 abstract description 12
- 239000000314 lubricant Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 9
- 239000000758 substrate Substances 0.000 description 8
- 238000007599 discharging Methods 0.000 description 7
- 238000004804 winding Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 4
- 239000008041 oiling agent Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- XWUCFAJNVTZRLE-UHFFFAOYSA-N 7-thiabicyclo[2.2.1]hepta-1,3,5-triene Chemical compound C1=C(S2)C=CC2=C1 XWUCFAJNVTZRLE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004727 Noryl Substances 0.000 description 1
- 229920001207 Noryl Polymers 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
A pump apparatus is capable of preventing a slide surface of a bearing part from abrasion. In the pump apparatus (100), a fixed side slide surface (381) of a thrust bearing member (38) is provided with a communication path formed by a groove and a through hole and connected with a fluid passage (57) in a pump chamber (6), therefore, the liquid through the fluid passage (57) is guided between the fixed side slide surface (381) and a rotary side slide surface (417) of a sleeve (41) by the communication path. Thus, there is always liquid between the fixed side slide surface (381) and the rotary side slide surface (417) to pass through the fluid passage (57), and the lubricant between the fixed side slide surface (381) and the rotary side slide surface (417) is good. In addition, abrasion powder generated between the fixed side slide surface (381) and the rotary side slide surface (417) can be discharged through the fluid passage (57).
Description
Technical field
The present invention relates to the pump-unit in the pump chamber that a kind of rotor that comprises impeller and rotary side bearing part rotatably is supported on the suction of carrying out liquid and discharge.
Background technique
In pump-unit,, adopt sometimes sleeve is being set on the rotor and the structure (with reference to patent documentation 1) of discoid thrust bearing part is set in pump chamber in order in the pump chamber of the suction of carrying out liquid and discharge, to support the rotor comprise impeller.
When adopting such bearing construction, the material that hardness is different is used for sleeve and thrust bearing part usually, to improve sliding.For example, sleeve uses material with carbon element, and thrust bearing part uses ceramic material.
Patent documentation 1: the Japan Patent spy opens the 2008-8222 communique
Yet, when constituting bearing, have the lower side wearing and tearing of hardness and make the problem of pump performance decline with the different parts of hardness.Especially, the thrust-bearing part is subjected to bigger power on thrust direction, and the wearing and tearing of generation are remarkable.In addition, when on rotor, keeping impeller,, then there is the problem of the corresponding decline of discharging performance meeting if depart from because of wearing and tearing produce the position of impeller.
Summary of the invention
In view of the above problems, the object of the present invention is to provide the pump-unit of the wearing and tearing on a kind of slip surface that can prevent bearing part.
In order to address the above problem, pump-unit of the present invention has the rotor that comprises impeller and rotary side bearing part in the pump chamber of the suction of carrying out liquid and discharge, the fixed side thrust bearing part that one side end face of the axial direction of above-mentioned rotary side bearing part is rotatably supported, it is characterized in that, on the either party in the fixed side slip surface that contacts with above-mentioned rotary side bearing part of said fixing side-thrust bearing part and above-mentioned rotary side bearing part and rotary side slip surface that said fixing side slip surface contacts, offer the access that is connected with the indoor fluid passage of said pump.
In the present invention, offer the access that is connected with fluid passage in the pump chamber on the either party in the rotary side slip surface of the fixed side slip surface of fixed side thrust bearing part and rotary side bearing part, therefore, the flow through liquid of fluid passage is introduced into via access between fixed side slip surface and the rotary side slip surface.Therefore, exist the liquid of the fluid passage of flowing through all the time between fixed side slip surface and rotary side slip surface, this liquid can be used as oiling agent and works, and the sliding between fixed side slip surface and the rotary side slip surface is better.Therefore, can prevent wearing and tearing on fixed side slip surface and the rotary side slip surface.In addition, in the thrust-bearing part, produce the power of thrust direction between fixed side slip surface and the rotary side slip surface, therefore be easy to generate wearing and tearing especially, if apply the present invention to this thrust-bearing part, then can effectively prevent the wearing and tearing of fixed side slip surface and rotary side slip surface.
In addition, the present invention is specially adapted to following structure: the negative pressure that above-mentioned rotor produces because of the rotation of above-mentioned impeller when it rotates is by towards a side application of force that disposes above-mentioned impeller, and said fixing side-thrust bearing part is supported the end face of a side at the above-mentioned impeller place in the both ends of the surface of the axial direction of above-mentioned rotary side bearing part.Under the situation that is keeping impeller on the rotor, during the rotor rotation, rotor because of negative pressure by towards a side application of force that disposes impeller, in the thrust-bearing part, produce the power of bigger thrust direction between fixed side slip surface and the rotary side slip surface, therefore be easy to generate wearing and tearing especially,, then can effectively prevent the wearing and tearing of fixed side slip surface and rotary side slip surface if apply the present invention to this thrust-bearing part.In addition, to the application of force direction of rotor when opposite, be fit to apply the present invention to the thrust-bearing part that the end face to a side opposite with a side at above-mentioned impeller place is supported.
In the present invention, comparatively it is desirable to said fixing side slip surface is formed by identical stupalith with above-mentioned rotary side slip surface.When fixed side slip surface and rotary side slip surface are formed by identical materials, sliding reduces easily, but in the present invention, the liquid of fluid passage of flowing through is introduced into via access between fixed side slip surface and the rotary side slip surface, all the time there is liquid to exist between fixed side slip surface and the rotary side slip surface, therefore, even when fixed side slip surface and rotary side slip surface are formed by identical materials, sliding between fixed side slip surface and the rotary side slip surface is also higher, can prevent the wearing and tearing on fixed side slip surface and the rotary side slip surface.In addition, when fixed side slip surface and rotary side slip surface are formed by stupalith, in case generation abrasion powder, it just can work as polishing agent, but if according to the present invention, then abrasion powder can produce seldom, and, have abrasion powder to produce, it also can be discharged by access, thereby can effectively prevent the wearing and tearing of fixed side slip surface and rotary side slip surface.
In the present invention, comparatively it is desirable to above-mentioned access and be formed in groove on the slip surface in said fixing side slip surface and the above-mentioned rotary side slip surface.In this case, it is desirable to above-mentioned access especially is the morphogenetic groove that is connected with the outer periphery of this slip surface with the stationary axle patchhole that will be formed on the above-mentioned slip surface.If this structure then can easily form access.In addition, end by making above-mentioned groove is at the indoor above-mentioned fluid passage split shed of said pump, can insert the liquid into each corner of fixed side slip surface and rotary side slip surface, and the foreign matter that produces between fixed side slip surface and the rotary side slip surface can be discharged efficiently.
In the present invention, can adopt following structure, promptly above-mentioned access is to run through said fixing side bearing parts and at the penetration hole of said fixing side slip surface upper shed.If this structure then can easily be connected access with fluid passage.
In the present invention, can adopt following structure, promptly above-mentioned access comprises: be formed on the groove on the said fixing side slip surface and run through said fixing side-thrust bearing part and the penetration hole that is connected with above-mentioned groove.If this structure, then can utilize groove to insert the liquid into each corner of fixed side slip surface and rotary side slip surface, and,, the foreign matter that produces between fixed side slip surface and the rotary side slip surface can be discharged efficiently by the fluid passage split shed of an end in pump chamber that makes penetration hole.In addition, utilize penetration hole easily access to be connected with fluid passage.
In the present invention, on the either party in the rotary side slip surface of the fixed side slip surface of fixed side thrust bearing part and rotary side bearing part, offer the access that is connected with fluid passage in the pump chamber, therefore, the flow through liquid of fluid passage is introduced into via access between fixed side slip surface and the rotary side slip surface.Therefore, exist the liquid of the fluid passage of flowing through all the time between fixed side slip surface and rotary side slip surface, this liquid can be used as oiling agent and works, and the sliding between fixed side slip surface and the rotary side slip surface is better.Therefore, can prevent wearing and tearing on fixed side slip surface and the rotary side slip surface.In addition, in the thrust-bearing part, produce the power of thrust direction between fixed side slip surface and the rotary side slip surface, therefore be easy to generate wearing and tearing especially, if apply the present invention to this thrust-bearing part, then can effectively prevent the wearing and tearing of fixed side slip surface and rotary side slip surface.
Description of drawings
Fig. 1 is the explanatory drawing of the cross section structure of the related pump-unit of expression embodiments of the present invention 1.
Fig. 2 is the explanatory drawing of the cross section structure of the related pump-unit of expression embodiments of the present invention 1.
Fig. 3 (a) and (b), (c), (d) are respectively near the amplification views the end of the rotor that uses from the related pump-unit of embodiments of the present invention 1 worm's eye view, plan view, E1-E1 ' sectional view, E2-E2 ' sectional view and the magnet of pulling down the state behind the impeller body.
Fig. 4 (a) and (b), (c), (d) are respectively worm's eye view, side view, A1-A1 ' sectional view and the B1-B1 ' sectional views of the thrust bearing part that uses in the related pump-unit of embodiments of the present invention 1.
Fig. 5 (a) and (b), (c) are respectively worm's eye view, side view and the A2-A2 ' sectional views of the thrust bearing part that uses in the related pump-unit of the variation of embodiments of the present invention 1.
Fig. 6 (a) and (b), (c) are respectively worm's eye view, side view and the A3-A3 ' sectional views of the thrust bearing part that uses in the related pump-unit of embodiments of the present invention 2.
Fig. 7 (a) and (b), (c), (d) are respectively worm's eye view, side view, A4-A4 ' sectional view and the C4-C4 ' sectional views of the thrust bearing part that uses in the related pump-unit of embodiments of the present invention 3.
Fig. 8 (a) and (b), (c), (d) are respectively worm's eye view, side view, A5-A5 ' sectional view and the C5-C5 ' sectional views of the thrust bearing part that uses in the related pump-unit of the variation of embodiments of the present invention 3.
(symbol description)
1 motor
3 stators
4 rotors
6 pump chambers
100 pump-units
35 stationary axle
38 thrust bearing parts (fixed side bearing part)
40 rotor parts
41 sleeves (rotary side bearing part)
42 magnet
57 fluid passages
381 fixed side slip surfaces
382 grooves
384 penetration holes
417 rotary side slip surfaces
570 access
Embodiment
Below, as embodiments of the present invention, pump-unit involved in the present invention is described.
[mode of execution 1]
(overall structure of pump-unit)
Fig. 1 and Fig. 2 are respectively the explanatory drawing and the exploded views thereof of the cross section structure of the related pump-unit (electronic device) of expression embodiments of the present invention 1.
Pump-unit 100 illustrated in figures 1 and 2 is the pump-units that are commonly referred to as canned motorpump, comprises that power supply is with substrate internally-arranged type brushless motor (below be called motor 1).The profile of the pump-unit 100 that present embodiment is related is formed by the housing 53 on the top of the cup-shaped shell 51 that covers stator 3 described later, covering shell 51.Shell 51 is made of resin-case 51a, the moulding resin body 51b that is molded on this resin-case 51a.On shell 51 and housing 53, form porosely 511,531 respectively, fix common bolt 15, make shell 51 and housing 53 form one by utilizing these holes 511,531.
Between shell 51 and housing 53, divide and be formed with the pump chamber 6 that fluid is flowed through.That is, in the present embodiment, the wall self of shell 51 employed resin-case 51a be formed in divide between itself and the housing 53 form pump chamber 6 between wall 52.On shell 51, the central part of wall 52 is formed with towards the recess 52e of the side depression opposite with pump chamber 6 betwixt, shell 51 on the upper-end surface 52g of recess 52e, be formed with slot part 52h with respect to recess 52e with concentric shape.In the internal configurations of slot part 52h O shape circle 12 is arranged, this O shape circle 12 guaranteed between housing 53 and the shell 51 seal, be the seal of pump chamber 6.
(structure of motor)
The motor 1 of present embodiment comprises stator 3, rotor 4 and power supply substrate 2a, 2b.In this motor 1, the first axis hole 52b that the two axial ends of stationary axle 35 is formed on the bottom surface 52a of recess 52e of shell 51 supports with the second axis hole 53a on the supporting part 53s relative with the first axis hole 52b that is formed on housing 53, and stationary axle 35 is coaxial shape configuration with respect to importing oral area 55.Rotor 4 rotatably is supported with respect to stationary axle 35, is fixed with the thrust bearing part 37 of rotor 4 usefulness on a side end of stationary axle 35, is keeping thrust bearing part 38 on end side.
Herein, thrust bearing part 37 is made by SUS (stainless steel), and thrust bearing part 38 is made by pottery.The middle body of this thrust bearing part 37,38 be formed with for stationary axle 35, cross section is processed to the stationary axle patchhole 370,380 that the shaft end of D word shape embeds, thrust bearing part 37,38 is in the state that rotation is prevented from.But thrust bearing part 37,38 can move at stationary axle 35 upper edge axial directions, exists the space between thrust bearing part 38 and rotor 4.
In this thrust bearing part 37,38, thrust bearing part 38 is to use fixed side thrust bearing part of the present invention, and as for its detailed structure, the back describes with reference to Fig. 4.
On powering, be formed with the portion of running through that forms by hole of running through for terminal pins 34 or slit, and be formed with a plurality of wiring patterns and welding disk with substrate 2a.Therefore, in the time will powering with substrate 2a with the 32 relative configurations of coil-winding pipe, terminal pins 34 runs through to power uses substrate 2a, so terminal pins 34 can be connected with welding disk.In addition, on powering, be formed with for the penetration hole that passes from magnetic detecting element 95 extended lead 2c, welding disk and the wiring pattern that lead 2c uses with substrate 2a.In addition, on powering, the drive circuit (not shown) of drive controlling stator 3 is installed, and the power connector 72 of reception from the electric power of power supply (not shown) is installed with substrate 2a.
The stator 3 and the power supply that constitute are like this carried out the inside that resin forming is locked in moulding resin body 51b with substrate 2a, 2b by insert moulding, and under this state, stator 3 disposes with the form around the recess 52e of shell 51.Herein, the side walls 52f of recess 52e is positioned at all sides of stator 3, but this side walls 52f as thin as a wafer.
On rotor part 40, constitute blade part 48a at the opposition side of the side at sleeve 41 and magnet 42 places.In the present embodiment, blade part 48a is formed on the discoid impeller body 48, and impeller body 48 links with rotor part 40, therefore, on rotor 4, blade part 48a and the rotation of rotor part 40 one.
(structure of rotor 4)
Fig. 3 (a) and (b), (c), (d) are respectively worm's eye view, plan view, E1-E1 ' sectional view and the E2-E2 ' sectional views that the rotor that uses from the related pump-unit of embodiments of the present invention 1 is pulled down the state behind the impeller body.In addition, in Fig. 3, the upper-lower position of each parts is opposite with Fig. 1 and Fig. 2.That is, in Fig. 1 and Fig. 2, impeller body 48 is illustrated in the top, but the form below being positioned at impeller body 48 is represented in Fig. 3.
Shown in Fig. 3 (a) and (b), (c), (d), having used pump-unit 100 employed rotors 4 of the present invention has magnet 42 cylindraceous and is fixed on structure on the rotor part 40 cylindraceous, in the upper end portion of rotor part 40, the large diameter impeller linking department 47 that links with impeller body illustrated in figures 1 and 2 48 forms discoid.Be formed with aperture 47b in the upper-end surface of impeller linking department 47, this aperture 47b embeds for the kick that is formed on the impeller body 48.In Fig. 3 (b), with dot and dash line represent the part at blade part 48a place, aperture 47b be formed on blade part 48a position overlapped on.
In rotor part 40, on two positions respect to one another of the adjacent cylindrical body 46 of downside, be formed with the hole 46a of ventilation usefulness with respect to impeller linking department 47.
In rotor part 40, on the downside position adjacent, be formed with discoid seat portion 45 with respect to cylindrical body 46.Be formed with the protuberance (not shown) that radially extends on two relative positions of present portion 45.In these two protuberances and four recesses (not shown) that are formed on the end face 421 of magnet 42 certain two are chimeric, thereby prevent that magnet 42 from rotating around axis.
In rotor part 40, magnet assembly department 44 cylindraceous is holded up towards opposite side from seat portion 45, and side is formed with sleeve 41 within it.The part of the maintenance sleeve 41 of magnet assembly department 44 forms thicklyer.In addition, in rotor part 40, in the both end sides of sleeve 41, be formed with the teat 448,449 of ring-type from the inner peripheral surface of magnet assembly department 44 towards radially inner side, the stepped part 411,412 that this projection will be formed on the both ends of the surface of sleeve 41 covers.Therefore, sleeve 41 is securely fixed on the rotor part 40.In addition, because the length dimension of magnet assembly department 44 is bigger than the length dimension of sleeve 41, therefore there is not sleeve 41 in the inboard of the underpart of magnet assembly department 44.
In addition, in rotor part 40, on two positions respect to one another, the inner peripheral surface of the groove 44e of ventilation from the inner circumference edge of the front end 440 of magnet assembly department 44 along magnet assembly department 44 extends along axial direction, and this groove 44e is in the conical surface 465 upper sheds of the internal side diameter that is formed at a portion 45.
(bearing construction)
Fig. 4 (a) and (b), (c), (d) are respectively worm's eye view, side view, A1-A1 ' sectional view and the B1-B1 ' sectional views of the thrust bearing part 38 that uses in the related pump-unit of embodiments of the present invention 1.
In the present embodiment, in order on the thrust direction side that disposes impeller body 48 on the axial direction of rotor 4 to be supported, the end face that disposes a side of impeller body 48 in the both ends of the surface with 38 pairs of sleeves 41 of thrust bearing part is supported.Therefore, in Fig. 1 and Fig. 2, work as rotary side slip surface 417 in the upper-end surface of sleeve 41, works as fixed side slip surface 381 in the lower end surface of thrust bearing part 38.
Herein, sleeve 41 and thrust bearing part 38 form by identical materials.In the present embodiment, sleeve 41 and thrust bearing part 38 form by stupalith.Therefore, rotary side slip surface 417 and fixed side slip surface 381 are formed by identical materials (stupalith).At the bearing part of such structure, the both ends of the surface of sleeve 41 are tabular surfaces, and rotary side slip surface 417 is tabular surfaces.
Shown in Fig. 4 (a) and (b), (c), (d), the lower end surface of thrust bearing part 38 (fixed side slip surface 381) is a tabular surface with rotary side slip surface 417 equally, but on fixed side slip surface 381, be formed with groove 382, this groove 382 extends to outer periphery 388 from the stationary axle patchhole 380 of the D word shape of central authorities always, and promptly the one end is at fluid passage 57 split sheds.In the present embodiment, groove 382 is on the straight line through stationary axle patchhole 380, promptly the footpath upwards is formed with two, and two grooves 382 are center and formation symmetrically with stationary axle patchhole 380.Therefore herein, the outside dimension of thrust bearing part 38 is bigger than the outside dimension of sleeve 41, and two grooves 382 extend to the outer circumferential side of the outer periphery of sleeve 41, are connected with fluid passage 57.
When using this thrust bearing part 38 to constitute pump-unit 100 shown in Figure 1, groove 382 constitutes the access 570 that is connected with the interior fluid passage 57 of pump chamber 6, this access 570 between stationary axle patchhole 380 and rotary side slip surface 417, on fixed side slip surface 381 towards fluid passage 57 openings.
(the main effect of present embodiment)
In the pump-unit 100 that constitutes like this, on the fixed side slip surface 381 of thrust bearing part 38, offer the access 570 that is connected with fluid passage 57 in the pump chamber 6, therefore, the flow through liquid of fluid passage 57 is introduced between fixed side slip surface 381 and the rotary side slip surface 417 via access 570.Therefore, exist the liquid of the fluid passage 57 of flowing through all the time between fixed side slip surface 381 and rotary side slip surface 417, this liquid can be used as oiling agent and works, and the sliding between fixed side slip surface 381 and the rotary side slip surface 417 is better.Therefore, can prevent wearing and tearing on fixed side slip surface 381 and rotary side slip surface 417.
In addition, in the present embodiment, the end face of a side at impeller body 48 places is supported in the both ends of the surface of the axial direction of 38 pairs of sleeves 41 of thrust bearing part of above-mentioned structure.Therefore, when rotor 4 rotations, rotor 4 because of negative pressure by towards a side application of force that disposes impeller body 48, between fixed side slip surface 381 and rotary side slip surface 417, can produce the power of bigger thrust direction, but according to present embodiment, even in this thrust-bearing part, also can effectively prevent the wearing and tearing of fixed side slip surface 381 and rotary side slip surface 417.
In addition, because fixed side slip surface 381 is to be formed by identical stupalith with rotary side slip surface 417, so wearability is good.Herein, when constituting fixed side slip surface 381 and rotary side slip surface 417 with same material, generally speaking sliding reduces easily, but in the present embodiment, owing to the liquid of the fluid passage 57 of flowing through is introduced between fixed side slip surface 381 and the rotary side slip surface 417 via access 570, between fixed side slip surface 381 and rotary side slip surface 417, there is liquid to exist all the time, therefore, even when fixed side slip surface 381 and rotary side slip surface 417 are formed by identical materials, sliding between fixed side slip surface 381 and the rotary side slip surface 417 is also higher, can prevent the wearing and tearing on fixed side slip surface 381 and the rotary side slip surface 417.
In addition, because fixed side slip surface 381 and rotary side slip surface 417 are formed by stupalith, therefore in case produce abrasion powder, it just can work as polishing agent, but if according to present embodiment, then abrasion powder can produce seldom, and, even there is abrasion powder to produce, it also can be discharged by access 570, thereby can effectively prevent the wearing and tearing of fixed side slip surface 381 and rotary side slip surface 417.
In addition, because access 570 is in 381 upper sheds of fixed side slip surface, centrifugal force when therefore rotor 4 rotates can act on liquid and the foreign matter in the access 570 effectively, compare when 417 upper sheds of rotary side slip surface with access 570, liquid in the access 570 can be come in and gone out effectively, and foreign matter can be discharged effectively.
In addition, in the present embodiment, access 570 is to be formed by the groove 382 that is formed on the fixed side slip surface 381, therefore can easily form access 570.In addition, access 570 is to be formed by the groove 382 that radially forms with the form that is connected and fixed shaft insertion hole 380 and outer periphery 388 on fixed side slip surface 381, therefore, when 417 rotations of rotary side slip surface, rotary side slip surface 417 all over can be through being formed with the zone of groove 382 (access 570).Therefore, can insert the liquid into each corner of fixed side slip surface 381 and rotary side slip surface 417, and the foreign matter that produces between fixed side slip surface 381 and the rotary side slip surface 417 can be discharged efficiently.
[variation of mode of execution 1]
Fig. 5 (a) and (b), (c) are respectively worm's eye view, side view and the A2-A2 ' sectional views of the thrust bearing part 38 that uses in the related pump-unit of the variation of embodiments of the present invention 1.In addition, the basic structure of present embodiment is identical with mode of execution 1, therefore, common part is marked identical symbol and omits its explanation.
Present embodiment is also the same with mode of execution 1, works as rotary side slip surface 417 in the upper-end surface of sleeve 41 illustrated in figures 1 and 2, works as fixed side slip surface 381 in the lower end surface of thrust bearing part 38.Herein, sleeve 41 and thrust bearing part 38 are made by pottery.At the bearing part of such structure, the both ends of the surface of sleeve 41 are tabular surfaces, and rotary side slip surface 417 is tabular surfaces.
Shown in Fig. 5 (a) and (b), (c), the lower end surface of thrust bearing part 38 (fixed side slip surface 381) and rotary side slip surface 417 are the same to be tabular surface, but be formed with four grooves 382 on fixed side slip surface 381, these four grooves 382 extend to outer periphery 388 from the stationary axle patchhole 380 of the D word shape of central authorities always towards the four directions.In the present embodiment, four grooves 382 form with 90 ° interval.
When using the thrust bearing part 38 that constitutes like this to constitute pump-unit 100 shown in Figure 1, article four, groove 382 constitutes the access 570 that is connected with the interior fluid passage 57 of pump chamber, this access 570 is between stationary axle patchhole 380 and rotary side slip surface 417, in 381 upper sheds of fixed side slip surface.Therefore, the flow through liquid of fluid passage 57 is introduced between fixed side slip surface 381 and the rotary side slip surface 417 via access 570.Therefore, between fixed side slip surface 381 and rotary side slip surface 417, exist the liquid of the fluid passage 57 of flowing through all the time, thus can play between fixed side slip surface 381 and the rotary side slip surface 417 sliding better and can be with abrasion powder from the effect identical such as discharging between fixed side slip surface 381 and the rotary side slip surface 417 with mode of execution 1.
Herein, the quantity of groove 382 is many more, liquid just can be smooth and easy more from the discharge between fixed side slip surface 381 and the rotary side slip surface 417 towards introducing between fixed side slip surface 381 and the rotary side slip surface 417 and abrasion powder, area of contact reduces relatively but then, thereby the thrust load of unit area increases wearing and tearing easily.Therefore, the quantity of groove 382 is about one to five, comparatively it is desirable to about two to four.In addition, as for the formation position of groove 382,, comparatively it is desirable to the form configuration of five equilibrium whole circumference a plurality of from guaranteeing to load on the angle of the balance that makes progress in week well.
[mode of execution 2]
Fig. 6 (a) and (b), (c) are respectively worm's eye view, side view and the A3-A3 ' sectional views of the thrust bearing part 38 that uses in the related pump-unit of embodiments of the present invention 2.In addition, the basic structure of present embodiment is identical with mode of execution 1, therefore, common part is marked identical symbol and omits its explanation.
Present embodiment is also the same with mode of execution 1, works as rotary side slip surface 417 in the upper-end surface of sleeve 41 illustrated in figures 1 and 2, works as fixed side slip surface 381 in the lower end surface of thrust bearing part 38.Herein, sleeve 41 and thrust bearing part 38 are made by pottery.At the bearing part of such structure, the both ends of the surface of sleeve 41 are tabular surfaces, and rotary side slip surface 417 is tabular surfaces.
Shown in Fig. 6 (a) and (b), (c), the lower end surface of thrust bearing part 38 (fixed side slip surface 381) and rotary side slip surface 417 are the same to be tabular surface, but is formed with two penetration holes 384 that run through thrust bearing part 38 on thrust bearing part 38.In the present embodiment, two penetration holes 384 are formed on the symmetrical position that clips stationary axle patchhole 380.Herein, in Fig. 6 (a), the outer periphery of representing the part of the supporting part 53s of housing 53 and thrust bearing part 38 butts with dot and dash line, the outer periphery of representing the part of sleeve 41 and thrust bearing part 38 butts with double dot dash line, two penetration holes 384 on the fixed side slip surface 381 of thrust bearing part 38 with regional inner openings sleeve 41 butts, fluid passage 57 openings of the outside in the zone of and supporting part 53s butt housing 53 (face of a side opposite) in the pump chamber 6 with fixed side slip surface 381 in the back side 389 of thrust bearing part 38.
When using the thrust bearing part 38 that constitutes like this to constitute pump-unit 100 shown in Figure 1, two penetration holes 384 constitute the access 570 that is connected with the interior fluid passage 57 of pump chamber 6, this access 570 is between stationary axle patchhole 380 and rotary side slip surface 417, in 381 upper sheds of fixed side slip surface.
Therefore, the liquid of the fluid passage 57 of flowing through is introduced between fixed side slip surface 381 and the rotary side slip surface 417 via access 570, exists the liquid of the fluid passage 57 of flowing through between fixed side slip surface 381 and rotary side slip surface 417 all the time.Therefore, can play between fixed side slip surface 381 and the rotary side slip surface 417 sliding better and can be with abrasion powder etc. from the effect identical such as discharging between fixed side slip surface 381 and the rotary side slip surface 417 with mode of execution 1.
[mode of execution 3]
Fig. 7 (a) and (b), (c), (d) are respectively worm's eye view, side view, A4-A4 ' sectional view and the C4-C4 ' sectional views of the thrust bearing part 38 that uses in the related pump-unit of embodiments of the present invention 3.In addition, the basic structure of present embodiment is identical with mode of execution 1, therefore, common part is marked identical symbol and omits its explanation.
Present embodiment is also the same with mode of execution 1, works as rotary side slip surface 417 in the upper-end surface of sleeve 41 illustrated in figures 1 and 2, works as fixed side slip surface 381 in the lower end surface of thrust bearing part 38.Herein, sleeve 41 and thrust bearing part 38 are made by pottery.At the bearing part of such structure, the both ends of the surface of sleeve 41 are tabular surfaces, and rotary side slip surface 417 is tabular surfaces.
Shown in Fig. 7 (a) and (b), (c), (d), the lower end surface of thrust bearing part 38 (fixed side slip surface 381) and rotary side slip surface 417 are the same to be tabular surface, but on fixed side slip surface 381, from the stationary axle patchhole 380 of the D word shape of central authorities to way radially the position be formed with two grooves 382.
In addition, be formed with two penetration holes 384 on thrust bearing part 38, the outboard end of the groove 382 of these two penetration holes 384 from the fixed side slip surface 381 extends to the back side 389 of thrust bearing part 38 (face of a side opposite with fixed side slip surface 381) always.In the present embodiment, two penetration holes 384 and two grooves 382 are formed on the symmetrical position that clips stationary axle patchhole 380.Herein, in Fig. 7 (a), the outer periphery of representing the part of the supporting part 53s of housing 53 and thrust bearing part 38 butts with dot and dash line, represent the outer periphery of sleeve 41 and the part of thrust bearing part 38 butts with double dot dash line, two penetration holes 384 and two grooves 382 all are formed on the fixed side slip surface 381 of thrust bearing part 38 and zones sleeve 41 butts.In addition, two penetration holes 384 in the outside in the zone of back side 389 and supporting part 53s butt housing 53 of thrust bearing part 38 fluid passage 57 openings in the pump chamber 6.
When using the thrust bearing part 38 that constitutes like this to constitute pump-unit 100 shown in Figure 1, penetration hole 384 and groove 382 constitutes the access 570 that is connected with the interior fluid passage 57 of pump chamber 6, this access 570 is between stationary axle patchhole 380 and rotary side slip surface 417, in 381 upper sheds of fixed side slip surface.
Therefore, the liquid of the fluid passage 57 of flowing through is introduced between fixed side slip surface 381 and the rotary side slip surface 417 via access 570, exists the liquid of the fluid passage 57 of flowing through between fixed side slip surface 381 and rotary side slip surface 417 all the time.Therefore, can play between fixed side slip surface 381 and the rotary side slip surface 417 sliding better and can be with abrasion powder etc. from the effect identical such as discharging between fixed side slip surface 381 and the rotary side slip surface 417 with mode of execution 1.
[variation of mode of execution 3]
Fig. 8 (a) and (b), (c), (d) are respectively worm's eye view, side view, A5-A5 ' sectional view and the C5-C5 ' sectional views of the thrust bearing part 38 that uses in the related pump-unit of the variation of embodiments of the present invention 3.In addition, the basic structure of present embodiment is identical with mode of execution 1, therefore, common part is marked identical symbol and omits its explanation.
Present embodiment is also the same with mode of execution 1, works as rotary side slip surface 417 in the upper-end surface of sleeve 41 illustrated in figures 1 and 2, works as fixed side slip surface 381 in the lower end surface of thrust bearing part 38.Herein, sleeve 41 and thrust bearing part 38 are made by pottery.At the bearing part of such structure, the both ends of the surface of sleeve 41 are tabular surfaces, and rotary side slip surface 417 is tabular surfaces.
Shown in Fig. 8 (a) and (b), (c), (d), the lower end surface of thrust bearing part 38 (fixed side slip surface 381) and rotary side slip surface 417 are the same to be tabular surface, but be formed with two grooves 382 on fixed side slip surface 381, these two grooves 382 extend to outer periphery 389 from the stationary axle patchhole 380 of the D word shape of central authorities always.
In addition, be formed with two penetration holes 384 on thrust bearing part 38, the position extends to the back side 389 of thrust bearing part 38 always the way of the long side direction of the groove 382 of these two penetration holes 384 from fixed side slip surface 381.In the present embodiment, two penetration holes 384 and two grooves 382 are formed on the symmetrical position that clips stationary axle patchhole 380.Herein, in Fig. 8 (a), the outer periphery of representing the part of the supporting part 53s of housing 53 and thrust bearing part 38 butts with dot and dash line, the outer periphery of representing the part of sleeve 41 and thrust bearing part 38 butts with double dot dash line, article two, groove 382 extends to outer periphery 388 from the stationary axle patchhole 380 of the D word shape of central authorities always, and penetration hole 384 is at the regional inner opening of sleeve 41 with fixed side slip surface 381 butts of thrust bearing part 38.In addition, two penetration holes 384 are in the outer openings in the zone of back side 389 and supporting part 53s butt housing 53 of thrust bearing part 38.
When using the thrust bearing part 38 that constitutes like this to constitute pump-unit 100 shown in Figure 1, penetration hole 384 and groove 382 constitutes the access 570 that is connected with the interior fluid passage 57 of pump chamber 6, this access 570 is between stationary axle patchhole 380 and rotary side slip surface 417, in 381 upper sheds of fixed side slip surface.
Therefore, the liquid of the fluid passage 57 of flowing through is introduced between fixed side slip surface 381 and the rotary side slip surface 417 via access 570, exists the liquid of the fluid passage 57 of flowing through between fixed side slip surface 381 and rotary side slip surface 417 all the time.Therefore, can play between fixed side slip surface 381 and the rotary side slip surface 417 sliding better and can be with abrasion powder etc. from the effect identical such as discharging between fixed side slip surface 381 and the rotary side slip surface 417 with mode of execution 1.
In addition, in the present embodiment, access 570 is included on the fixed side slip surface 381 to be connected and fixed the morphogenetic groove 382 of shaft insertion hole 380 and outer periphery 389, therefore can easily form access 570.In addition, when 417 rotations of rotary side slip surface, rotary side slip surface 417 is all over through being formed with the zone of groove 382 (access 570), therefore, can insert the liquid into each corner of fixed side slip surface 381 and rotary side slip surface 417, and the foreign matter that produces between fixed side slip surface 381 and the rotary side slip surface 417 can be discharged efficiently.
[other mode of execution]
In the above-described embodiment, employing be the structure of access 570 in 381 upper sheds of fixed side slip surface, but also can adopt the structure of access 570 in fixed side slip surface 381 upper sheds of sleeve 41.
In the above-described embodiment, sleeve 41 and thrust bearing part 38 are made by pottery, but sleeve 41 and thrust bearing part 38 also can be made of metal or be formed from a resin, the structure that also can adopt sleeve 41 and thrust bearing part 38 to be formed by different materials respectively.
In the above-described embodiment, apply the present invention to dispose in the rotor 4 the thrust-bearing part of a side of impeller body 48, but also can apply the present invention to the thrust-bearing part of a side opposite in the rotor 4 with a side that disposes impeller body 48.
In the above-described embodiment, apply the present invention to the thrust-bearing part, but also can apply the present invention to be also used as the part of thrust-bearing and radial bearing.
In the above-described embodiment, what illustrate is to apply the present invention to magnet 42 is positioned at the inner-rotor type of radially inner side with respect to stator the example of electronic device, but also can apply the present invention to magnet 42 is positioned at the external rotor type of radial outside with respect to stator electronic device.
Claims (17)
1. pump-unit, in the pump chamber of the suction of carrying out liquid and discharge, have: comprise the rotor of impeller and rotary side bearing part and the fixed side thrust bearing part that a side end face of the axial direction of described rotary side bearing part is rotatably supported, described pump-unit is characterised in that
On the either party in the fixed side slip surface that contacts with described rotary side bearing part of described fixed side thrust bearing part and described rotary side bearing part and rotary side slip surface that described fixed side slip surface contacts, offer the access that is connected with fluid passage in the described pump chamber.
2. pump-unit as claimed in claim 1 is characterized in that,
When the rotation of described rotor, the negative pressure that described rotor produces because of the rotation of described impeller is by towards a side application of force that disposes described impeller,
Described fixed side thrust bearing part is supported the end face of a side at impeller place described in the both ends of the surface of the axial direction of described rotary side bearing part.
3. pump-unit as claimed in claim 2 is characterized in that, described fixed side slip surface is formed by identical stupalith with described rotary side slip surface.
4. pump-unit as claimed in claim 3 is characterized in that, described access is formed in the groove on the described fixed side slip surface.
5. pump-unit as claimed in claim 4 is characterized in that, described access is the morphogenetic groove that is connected with the outer periphery of this fixed side slip surface with the stationary axle patchhole that will be formed on the described fixed side slip surface.
6. pump-unit as claimed in claim 3 is characterized in that, described access is to run through described fixed side bearing part and at the penetration hole of described fixed side slip surface upper shed.
7. pump-unit as claimed in claim 3 is characterized in that, described access comprises: be formed on the groove on the described fixed side slip surface and run through described fixed side bearing part and the penetration hole that is connected with described groove.
8. pump-unit as claimed in claim 3 is characterized in that, described access is formed in the groove on the slip surface in described fixed side slip surface and the described rotary side slip surface.
9. pump-unit as claimed in claim 1, it is characterized in that, described access is formed on the slip surface in described fixed side slip surface and the described rotary side slip surface and with along the morphogenetic groove that radially crosses, the described fluid passage split shed of an end of this groove in described pump chamber.
10. pump-unit as claimed in claim 9 is characterized in that, described access is the morphogenetic groove that is connected with the outer periphery of this slip surface with the stationary axle patchhole that will be formed on the described slip surface.
11. pump-unit as claimed in claim 1 is characterized in that, described access is to run through described fixed side bearing part and at the penetration hole of described fixed side slip surface upper shed, the described fluid passage split shed of an end of this penetration hole in described pump chamber.
12. pump-unit as claimed in claim 1 is characterized in that, described access comprises: be formed on the groove on the described fixed side slip surface and run through described fixed side bearing part and the penetration hole that is connected with described groove.
13. pump-unit as claimed in claim 1 is characterized in that,
When the rotation of described rotor, described rotor is subjected to the axial application of force along described rotor because of the rotation of described impeller,
Described fixed side thrust bearing part is supported the end face towards the axially movable side of described rotor in the both ends of the surface of the axial direction of described rotary side bearing part.
14. pump-unit as claimed in claim 13 is characterized in that, described fixed side slip surface is formed by identical stupalith with described rotary side slip surface.
15. pump-unit as claimed in claim 13, it is characterized in that, described access be on described fixed side slip surface with along the morphogenetic groove that radially crosses described rotary side slip surface, the described fluid passage split shed of an end of this groove in described pump chamber.
16. pump-unit as claimed in claim 13 is characterized in that, described access is to run through described fixed side bearing part and at the penetration hole of described fixed side slip surface upper shed, the described fluid passage split shed of an end of this penetration hole in described pump chamber.
17. pump-unit as claimed in claim 13, it is characterized in that, described access comprises: be formed on the groove on the described fixed side slip surface and run through described fixed side bearing part and the penetration hole that is connected with described groove, the described fluid passage split shed of an end of described penetration hole in described pump chamber.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008171373A JP2010007642A (en) | 2008-06-30 | 2008-06-30 | Pump device |
| JP2008171373 | 2008-06-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101619724A true CN101619724A (en) | 2010-01-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910139832A Pending CN101619724A (en) | 2008-06-30 | 2009-06-24 | Pump apparatus |
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| Country | Link |
|---|---|
| JP (1) | JP2010007642A (en) |
| CN (1) | CN101619724A (en) |
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| CN102465887A (en) * | 2010-10-28 | 2012-05-23 | 日本电产三协株式会社 | Pump device |
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| JPS61178596A (en) * | 1985-02-05 | 1986-08-11 | Sanyo Electric Co Ltd | Pump |
| JPS61137897U (en) * | 1985-02-15 | 1986-08-27 | ||
| JP2795689B2 (en) * | 1989-08-10 | 1998-09-10 | 朝日興業株式会社 | Magnet pump |
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Application publication date: 20100106 |