CN106321506A - Rotor assembly and electric drive pump - Google Patents

Rotor assembly and electric drive pump Download PDF

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Publication number
CN106321506A
CN106321506A CN201510399082.6A CN201510399082A CN106321506A CN 106321506 A CN106321506 A CN 106321506A CN 201510399082 A CN201510399082 A CN 201510399082A CN 106321506 A CN106321506 A CN 106321506A
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CN
China
Prior art keywords
permanent magnet
rotor assembly
axle sleeve
cover
protruding
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Granted
Application number
CN201510399082.6A
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Chinese (zh)
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CN106321506B (en
Inventor
不公告发明人
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Zhejiang Sanhua Automotive Components Co Ltd
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Hangzhou Sanhua Research Institute Co Ltd
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Priority to CN201510399082.6A priority Critical patent/CN106321506B/en
Publication of CN106321506A publication Critical patent/CN106321506A/en
Application granted granted Critical
Publication of CN106321506B publication Critical patent/CN106321506B/en
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Abstract

Disclosed is a rotor assembly. The rotor assembly comprises a first portion and a second portion, the first portion is formed through integral injection molding, and comprises an impeller upper cover plate and blades, the upper cover plate and the blades are formed through integral injection molding, an impeller inlet is formed in the upper cover plate, and a first connecting structure is formed by the blades; the second portion is formed in an integral injection molding manner, and comprises an impeller lower cover plate, a rotor permanent magnet and a shaft sleeve, the second portion is molded through injection with the rotor permanent as an embedded part, an injection molding layer lower cover plate and the shaft sleeve are molded through injection, and the first portion and the second portion are welded and fixed through a first connecting portion and a second connecting portion; according to the rotor assembly, the production cost is reduced, meanwhile, the shaft sleeve is integrally molded, and the molding technology is simple.

Description

Rotor assembly and electric drive pump
[technical field]
The present invention relates to a kind of rotor assembly, be applied particularly to electric drive pump.
[background technology]
In recent decades, electric drive pump replaces traditional mechanical pump the most gradually, and is applied in heat circulating system in a large number.Electric drive pump has without advantages such as electromagnetic interference, high-efficiency environment friendly, stepless time adjustments, is well positioned to meet the requirement in market.
Electric drive pump includes that rotor assembly and stator module, rotor assembly and stator module are completely isolated by separation sleeve, it is to avoid the fluid leakage problems that traditional electric motor type brushless direct-current water pump exists;At present, rotor assembly includes impeller and rotor, and the usual integrated injection molding of rotor assembly shapes, i.e. impeller is identical with the material of rotor, rotor magnetizes, and impeller does not magnetizes, and so wastes magnetic material, and cost of manufacture is high, magnetic material is more crisp simultaneously, causes impeller poor toughness, easily damaged.
Therefore, it is necessary to existing technology is improved, to solve above technical problem.
[summary of the invention]
It is an object of the invention to provide a kind of rotor assembly, it is possible to reduce production cost.
For achieving the above object, the present invention adopts the following technical scheme that a kind of rotor assembly, described rotor assembly includes Part I and Part II, described Part I and described Part II shape respectively, described Part I integrated injection molding shapes, and described Part I includes that impeller upper cover plate, blade, described upper cover plate shape with described blade integrated injection molding, being formed with impeller inlet on described upper cover plate, described blade is formed with the first connecting portion towards described Part II;Described Part II is injection molded, described Part II includes impeller lower cover, rotor permanent magnet and axle sleeve, described Part II is formed through injection with described rotor permanent magnet for inserts, the injection molded layers of injection includes described lower cover and described axle sleeve, described lower cover is provided with the second connecting portion, described Part I and described Part II towards described Part I and is welded and fixed by described first connecting portion and described second connecting portion.
Described first connecting portion includes being arranged at the blade bottom protruding block protruding to described lower cover direction and raised item, and the height of described raised item projection is less than the height of described protruding block projection, and the height of described protruding block projection is less than or equal to the thickness of described back shroud;Described second connecting portion includes the groove being arranged at back shroud upper surface, is provided with striped protruding in described groove, is provided through the aperture of described back shroud in described groove, and described protruding block inserts in the aperture of described back shroud.
Described permanent magnet is polar anisotropic orientation, and N pole and the S pole of described permanent magnet are alternately present in the circumferential direction, described N pole and the magnetic concentration zones that position is described permanent magnet at place, described S pole;Described permanent magnet is the most in the form of a ring, described permanent magnet includes inner peripheral surface and outer peripheral face, described inner peripheral surface is cylindrical, described outer peripheral face includes plane and the face of cylinder, described plane and the uniformly arrangement of interval, the described face of cylinder, the described face of cylinder includes the described magnetic concentration zones of described permanent magnet, and described plane is arranged between adjacent described magnetic concentration zones.
Described plane is generally rectangular, and the long limit of described plane is roughly the same with the height of described permanent magnet, 1/3rd of the minor face the most described face of cylinder arc length of described plane.
Permanent magnet includes the first end face and the second end face, described first end face and described second end face are arranged substantially in parallel, described first end face and all substantially vertical settings with described outer peripheral face of described second end face, described first end face is provided with the first protruding block, described second end face is provided with the second protruding block, described injection molded layers covers described first end face and described second end face, described first lobe and the thickness of injection molded layers that formed less than the first end face and the second end face of the thickness of described injection molded layers that formed of top of described second.
Described first protruding block is different with the shape of described second protruding block, described first protruding block and described second protruding block correspond to the magnetic concentration zones of described permanent magnet and arrange, and described first protruding block is identical with the sum of the N pole of described permanent magnet and S pole with the quantity of described second protruding block.
Described axle sleeve is formed by described injection molded layers, and described axle sleeve includes top, middle part and bottom, and the top of described axle sleeve shapes with described lower cover integrated injection molding, the concordant setting in top of the end on the top of described axle sleeve and the cambered surface of described lower cover upper side;The bottom of described axle sleeve arranges between described permanent magnet upper surface and lower surface, and the middle part of described axle sleeve connects downside and the upper surface of described permanent magnet of described lower cover.
Described axle sleeve inner surface is formed with at least two groove, and described groove is uniformly distributed along described axle sleeve inner surface, and described groove runs through the upper and lower surface of described axle sleeve and connects setting with described inner hole of shaft sleeve, and described axle sleeve upper end arranges reeded extension.
It is formed with the gap of certain distance between described sleeve outer surface and described permanent magnet, is connected by dowel between described sleeve outer surface and permanent magnet.
A kind of electric drive pump, described electric drive pump includes that pump shaft, rotor assembly, stator module, described rotor assembly are arranged near described pump shaft than described stator module, and described pump shaft is fixedly installed, described rotor assembly rotates around pump shaft, and described rotor assembly is above-described rotor assembly.
Compared with prior art, the rotor assembly of the present invention includes Part I and Part II, the upper cover plate of Part I and blade integrated injection molding shape, Part II forms lower cover with permanent magnet for insert injection moulding, and two parts are by being welded and fixed, and the material of such Part I and Part II can differ, cost can be reduced, axle sleeve is integrally formed simultaneously, it is not necessary to other inserts, and processing technique can simplify.
[accompanying drawing explanation]
Fig. 1 is the sectional structure schematic diagram of the electric drive pump of one embodiment of the present invention;
Fig. 2 is the decomposition texture schematic diagram of rotor assembly shown in Fig. 1;
Fig. 3 is the perspective view of rotor assembly shown in Fig. 1;
Fig. 4 is the Facad structure schematic diagram of the bottom surface of rotor assembly shown in Fig. 2;
Fig. 5 is a cross section structure schematic diagram of rotor assembly shown in Fig. 2;
Fig. 6 is the Facad structure schematic diagram of Part I shown in Fig. 2;
Fig. 7 is the perspective view of Part II shown in Fig. 2;
Fig. 8 is the Facad structure schematic diagram of the end face of Part II shown in Fig. 8;
Fig. 9 is the perspective view of permanent magnet shown in Fig. 2;
Figure 10 is the Facad structure schematic diagram of the second end face shown in Fig. 9;
Figure 11 is a cross section structure schematic diagram of permanent magnet shown in Fig. 9;
Figure 12 is the Facad structure schematic diagram of the first end face shown in Fig. 9, simultaneously schematic diagram magnetic line of force distribution schematic diagram;
Figure 13 is the decomposition texture schematic diagram of electric machine casing shown in Fig. 1 and radiating subassembly;
Figure 14 is the plan structure schematic diagram after electric machine casing shown in Figure 13 combines with radiating subassembly;
Figure 15 is electric machine casing shown in Figure 13 combine with radiating subassembly after look up structural representation;
Figure 16 is the Section A-A structural representation of Figure 14;
Figure 17 is a perspective view of radiating part shown in Figure 13;
Figure 18 is a perspective view of the second metallic plate of heat-conducting part shown in Figure 13;
Figure 19 is a cross section structure schematic diagram of the second metallic plate of heat-conducting part shown in Figure 18.
[detailed description of the invention]
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings:
Fig. 1 is the structural representation of a kind of electric drive pump 100, and electric drive pump 100 includes impeller cavity lid 10, separation sleeve 20, electric machine casing 30, pump shaft 40, rotor assembly 50, stator module 60, electric-controlled plate 70, radiating subassembly 80;Pump inner chamber includes the space between impeller cavity lid 10, electric machine casing 30, pump inner chamber is divided into flowing lumen 91 and accommodates chamber 92 by separation sleeve 20, working media can be had to flow through in flowing lumen 91, rotor assembly 50 is arranged at flowing lumen 91, accommodating chamber 92 to pass through without working media, stator module 60 and electric-controlled plate 70 are arranged in receiving chamber 92;Pump shaft 40 is fixing with separation sleeve 20 injection, rotor assembly 50 can rotate around pump shaft 40, rotor assembly 50 is separated by separation sleeve 20 with stator module 60, stator module 60 electrically connects with electric-controlled plate 70, electric-controlled plate 70 is connected by plug connector with outside line, radiating subassembly 80 is for transmitting electric-controlled plate 70 heat and dispel the heat, and radiating subassembly 80 fixedly mounts with electric machine casing 30.In this example, electric drive pump 100 is inner-rotor-type electric drive pump, and inner-rotor-type electric drive pump refers to that axle centered by pump shaft 40, rotor assembly 50 are arranged closer to pump shaft 40 than stator module 60.In the present embodiment, pump shaft 40 is fixedly installed relative to separation sleeve 20, and rotor assembly 50 can rotate relative to pump shaft 40;Certainly pump shaft 40 can also be rotated relative to separation sleeve 20 by axle sleeve, and rotor assembly 50 is relatively fixed with pump shaft 40 and rotates with pump shaft 40.
Fig. 2 to Fig. 9 is the structural representation of rotor assembly 50, sees Fig. 2, and rotor assembly 50 includes two parts moulding, is Part I 51 and Part II 52 respectively, and Part I 51 and Part II 52 are by being welded and fixed;Part I 51 includes upper cover plate 11 and blade 12, and Part I 51 integrated injection molding shapes, and in one of which embodiment, injected plastics material is to include polyphenylene sulfide plastic (being called for short PPS plastics) and the mixture of glass fibre;Part II 52 includes permanent magnet 21 and lower cover 13, and Part II 52 is formed containing the mixing material that PPS plastics and carbon are fine through injection with permanent magnet 21 for injection inserts, and additionally injected plastics material can also be the relatively good thermoplastics of other mechanical performances;Seeing Fig. 3, rotor assembly 50 includes impeller 1 and rotor 2 by function, and impeller 1 includes upper cover plate 11, blade 12 and lower cover 13, and rotor 2 includes permanent magnet 21;In the present embodiment, the substantially ring-like structure of permanent magnet 21, permanent magnet 21 is injection molded, and certain rotor 2 can also be other versions;In the present embodiment, the impeller 1 part in addition to upper cover plate and permanent magnet 21 are molded into one and for electric drive pump, but impeller 1 can also be separately formed and for other centrifugal pumps, is not limited to electric drive pump, is not limited to integrally formed with rotor 2.
See Fig. 3, impeller 1 is the substantially enclosed construction with impeller inlet 15 with multiple outlets 14, impeller 1 includes impeller inlet 15, upper cover plate 11, blade 12, lower cover 13, impeller outlet 14, blade 12 is arranged between upper cover plate 11 and lower cover 13, upper cover plate 11 is formed with impeller inlet 15, between upper cover plate 11 and lower cover 13 and the outer edge at upper cover plate 11 of adjacent blades 12 is formed with multiple impeller outlet 14, multiple impeller passage is formed between adjacent blades 12, impeller passage connection impeller inlet 15 and one of them impeller outlet 14, impeller passage upper, downside is through upper cover plate 11, lower cover 13, the blade sidewall of these impeller passage both sides is closed.
See Fig. 3, Fig. 5 and Fig. 6, upper cover plate 11 is substantially in circular, upper cover plate 11 includes planar portions 111 and cambered surface portion 112, planar portions 111 includes plane 1111 and lower plane 1112, cambered surface portion 112 includes the first cambered surface portion 1121 and the second cambered surface portion 1122, first cambered surface portion 1121 is connected with upper plane 1111 and smoothly transits, and the second cambered surface portion 1122 is connected with lower plane 1112 and smoothly transits, and cambered surface portion 112 is around forming impeller inlet 15;Blade 12 and the lower plane 1112 of upper cover plate 11 or be molded fixing with lower plane 1112 and the second cambered surface portion 1122;Seeing Fig. 3, in the side-walls of impeller inlet 15, impeller 1 includes the part connecting portion that the vertical portion 113 tangent with the sidewall of impeller inlet 15, substantially upright portion 113 are upper cover plate 11 and blade 12, is so conducive to the demoulding of the Part I 51 of impeller 1.In the present embodiment, planar portions 111 and horizontal plane have certain angle, blade 12 to be substantially vertical setting with horizontal plane;First circumference of the most a diameter of Φ of outer rim 1 of upper cover plate 11, the diameter of impeller, equal to the diameter of the first circumference, also corresponds to the external diameter of the imaginary circles that the outer peripheral afterbody of blade 12 is formed.
See Fig. 2 and Fig. 6, blade 12 includes linear leaf 121 and short blade 122, linear leaf 121 is in arc-shaped, short blade 122 is also in arc-shaped, the arc length of linear leaf 121 is more than the arc length of short blade 122, linear leaf 121 is spacedly distributed along impeller 1 circumference, short blade 122 is spacedly distributed along impeller 1 circumference, linear leaf 121 is identical with the quantity of short blade 122, linear leaf 121 and short blade 122 are along impeller 2 circumferentially-spaced, i.e. short blade 122 is arranged between adjacent linear leaf 121, and linear leaf 121 and short blade 122 can be a circular arc or the combination of multiple circular arc.
See Fig. 6, linear leaf 121 is the integrative-structure being molded with lower plane 1112 and the second cambered surface portion 1122 of upper cover plate 11, linear leaf 121 is divided into the first paragraph 3 fixing with the injection of the second cambered surface portion 1122 and the second segment 4 fixing with lower plane 1112 injection, first paragraph 3 includes bottom stem 31, first 32, first concave surface the 33, first convex surface 34, second segment 4 includes 42, second concave surface the 43, second convex surface 44, afterbody 45 bottom second;Stem 31 stretches into impeller inlet 14 and arranges, stem 31 is the initiating terminal of linear leaf 121, afterbody 45 is the clearing end of linear leaf 121, arc length between stem 31 and afterbody 45 is the length of linear leaf 121, in the present embodiment, the first concave surface 33 and the second concave surface 43 form the first side of linear leaf 121, and the first convex surface 34 and the second convex surface 44 form the second side of linear leaf 121, stem 31 is the first stem of linear leaf 121, and afterbody 45 is the first afterbody of linear leaf 121;On the first circumference, the second concave surface 43 of adjacent linear leaf 121 and the first circular arc of between the intersection point of the first circumference being a length of L1, length L1 of the first circular arc is equal to the length of the circular arc of the decile of the quantity that the first circumference is divided into linear leaf 121;In the present embodiment, the quantity of linear leaf 121 is 5, and length L1 of the first circular arc is equal to the length that the girth of the first circumference is divided into five deciles.
See Fig. 2, the diversion division that part is linear leaf 121 at stem 31 place, working media enters impeller by impeller inlet 14, by stem 31 working media imported in the circulation passage of adjacent linear leaf 121, stem 31 is fixing with the medial wall injection of impeller inlet 14, first paragraph 3 also includes a joint face 1216, joint face 1216 is arranged between stem 31 and the first concave surface 33, the distance of joint face 1216 to the first convex surface 34 is less than the distance of the first concave surface 33 to the first convex surface 34, so joint face 1216 makes the thickness of this section of linear leaf 121 thinning, gap between the linear leaf 121 of such stem 31 to joint face 1216 rest position can increase, the flow resistance to working media can be reduced, the flowing of working media is more unimpeded.
See Fig. 2, Fig. 3, stem 31 stretches into impeller inlet 15 and arranges, through linear leaf 121 and the fixing point 311 of the sidewall of impeller inlet 15 with the center line drawing line always of the sidewall of parallel impeller inlet 15, stem 31 and angle substantially top rake θ 3 of this straight line, top rake θ 3 is in the range of 20 ° to 50 °, the free end of stem 31 tilts 20 ° to 50 ° to impeller inlet 14 central axial direction, and the part at such stem 31 place can preferably retrain the flowing of working media.
The thickness ε 1 of linear leaf 121 represents, the thickness ε 1 of linear leaf 121 refers to the vertical dimension between the first side of linear leaf and the second side;The present embodiment considering, the material of injection blade has certain fragility, the thinnest being likely to makes linear leaf 121 by destroying, rupturing or damage, so linear leaf thickness ε 1 value in the present invention is relatively large, in the present embodiment, the thickness ε 1 substantially 0.8mm to 2mm of linear leaf;In the present embodiment, the demoulding for convenience, there is less draft angle the first side and the second side, but owing to draft angle is the least, the height of the blade corresponding with the second side relative to the first side can be ignored.
See Fig. 6, on the first circumference, second concave surface 43 and the point of intersection of the first circumference of linear leaf 121, tangent line and first circumference of the second concave surface 43 lay angle beta 1 in the outlet that angle is linear leaf 121 of the tangent line of point of intersection, it is 20 ° to 60 ° that angle beta 1 is laid in the outlet of linear leaf 121, in the present embodiment, the impeller 1 of electric drive pump 100 is low-specific-speed centrifugal impeller, choose the bigger angle of outlet often and carry out minimizing disc friction as far as possible, thus ensure the Effec-tive Function of electric drive pump, but angle beta 1 is laid in big outlet can affect the stability of impeller, in order to obtain stable performance curve and the phenomenon that prevents from transshipping, structure for the impeller 1 of the present embodiment, the outlet of the linear leaf 121 of the present invention lay angle beta 1 scope at 20 ° to 60 °.
Seeing Fig. 2 and Fig. 6, linear leaf 121 includes bottom, and bottom includes bottom first bottom 32 and second 42;To upper cover plate 11 edge in the middle part of upper cover plate 11, bottom second, the distance of the lower plane 1112 of 42 to upper cover plate 11 gradually decreases;At the first circumference, the concordant setting of outward flange of afterbody 45 and the upper cover plate 11 of impeller, afterbody 45 is a bit of face of cylinder, a part for the imaginary circles cylinder of the extended formation of outward flange that afterbody 45 is upper cover plate 11 in other words;Afterbody 45 connects the second concave surface 43 and the second convex surface 44 at the tail end of linear leaf 121, and the height of afterbody 45 is the minimum constructive height of linear leaf 121, definition linear leaf 121 afterbody 45 the outlet height H1 that height is linear leaf 121.The bottom of linear leaf 121 is provided with and the fixing attachment structure of lower cover 13, attachment structure includes cylindrical projection portion 321 and raised item 322, the height of projection of raised item 322 is less than the height in cylindrical projection portion 321, raised item 322 is arranged along interval, bottom 1211, and each linear leaf 121 is provided with a cylindrical projection portion 321 and multiple raised item 322.
Seeing Fig. 6, short blade 122 is fixing with planar portions 111 injection of upper cover plate 11, and short blade 122 originates in the second virtual circumference of a diameter of Φ 2, terminates at first circumference of a diameter of Φ 1, and the diameter of phi 2 of the second circumference is 0.6 to 0.7 times of the first circumference Φ 1;Short blade 122 includes bottom front end 1221, concave side 1222, convex side 1223 and rear end 1224 and short blade 1225, front end 1221 includes connecting concave side 1222 and the arc surface of convex side 1223, front end 1221 is arranged on second circumference of a diameter of Φ 2, and rear end 1224 is arranged on first circumference of a diameter of Φ 1;On the first circumference, concave side 1222 and the point of intersection of the first circumference, the angle that the tangent line of concave side 1222 and the tangent line of the first circumference are formed is that angle beta 2 is laid in short blade 122 outlet;In the present embodiment, front end 1221 is the second stem of short blade 122, and rear end 1224 is the second afterbody of short blade 122, and concave side 1222 is the 3rd side of short blade 122, and convex side 1223 is the 4th side of short blade 122.The outlet of short blade 122 is laid angle beta 2 and is laid angle beta 1 less than or equal to the outlet of linear leaf 121, and in the present embodiment, it is less 3 ° to 10 ° than angle beta 1 is laid in the outlet of linear leaf 121 that angle beta 2 is laid in the outlet of short blade 122;Except front end 1221 part and rear end 1224 part, 0.6 to 1 times of the thickness ε 1 that thickness ε 2 is linear leaf of short blade, and with the central axis of impeller inlet as the center of circle, it is positioned at the height of short blade of same imaginary circles position less than or equal to the height of linear leaf.
In conjunction with seeing Fig. 2 and Fig. 6 from 1221 to rear end, front end 1224, bottom the short blade of short blade 122, the lower surface distance of 1225 to upper cover plate is gradually lowered, at the first circumference, distance is minimum, and short blade outlet height H2 is the minimum range of the lower surface of 1225 to upper cover plate bottom the short blade at the first circumference;The height of the short blade being positioned at same imaginary circles position in the present embodiment is less than the height of linear leaf, short blade outlet height H2 is less than linear leaf outlet height H1, after impeller combination forming, bottom short blade, between 1225 and lower cover 13, form certain interval or small-gap suture.On the first circumference, being a length of L2 the second circular arc between the tangent line of the tangent line of the concave side 1222 of short blade to the second concave surface 43 of adjacent linear leaf, arc length L2 of the second circular arc is 0.35 to 0.5 times of arc length L1 of the first circular arc.
See Fig. 7 and Fig. 8, lower cover 13 includes upper side 131 and downside, lower cover 13 is fixed with the bottom of blade 12 by upper side 131 and is connected, and the shape of the upper side 131 of lower cover 13 matches with the bottom shape of blade 12 setting, and the downside of lower cover 13 is approximately horizontal plane;The upper side 131 of lower cover 13 is formed with blade and installs groove 1311, the quantity that blade installs groove 1311 is identical with the quantity of linear leaf 121, blade is provided with striped projection 133 in installing groove 1311, at least one blade mounting groove 1311 position is additionally provided with the installation aperture 134 running through lower cover 13, and the bottom of corresponding linear leaf is provided with cylindrical projection portion 321 and coordinates with installing aperture 134.In the present embodiment, each blade mounting groove 1311 is both provided with one and installs aperture 134;When impeller 1 is installed, the cylindrical projection portion 321 of the bottom 1211 of linear leaf 121 inserts installs in aperture 134, and the bottom 1211 of linear leaf 121 is inserted in blade mounting groove 1311, fixes linear leaf 121 and lower cover 13 by ultrasonic bonding, forms impeller 1.Lower cover 13 is formed with impeller installing hole 136, by impeller installing hole 136, impeller 1 is sheathed on pump shaft 40 outer peripheral face.
In the present embodiment, lower cover 13 forms the Part II 52 of rotor assembly 50 with rotor 2 integrated injection molding, rotor 2 includes permanent magnet 21, see Fig. 9 to Figure 12, permanent magnet 21 is the most in the form of a ring, permanent magnet 21 is orientated for polar anisotropic, N pole and the S pole of permanent magnet 21 are alternately present in the circumferential direction, in the present embodiment, permanent magnet 21 includes two N poles and two S poles, permanent magnet 21 includes outer peripheral face 211 and inner peripheral surface 212, outer peripheral face 211 is formed with four planes 2111 and four faces of cylinder 2112, and plane 2111 is arranged at adjacent S pole and the boundary of N pole.As shown in figure 12, for permanent magnet 21, the periphery of the outer peripheral face 211 of permanent magnet 21 arranges stator module 60, periphery at permanent magnet 21, the orientation of the magnetic line of force presents substantially arc-shaped, from the beginning of N pole from the outer peripheral face of permanent magnet 21, the S pole in the outer peripheral face of the most adjacent permanent magnet 21, with single arrow signal in figure;In the inside of permanent magnet 21, from the beginning of the S pole of permanent magnet 21, towards the N pole of adjacent permanent magnet, figure is illustrated with double-head arrow;In the circumference of permanent magnet 21, N pole and S pole become magnetic and concentrate position 210, the magnetic line of force concentrating the close outer peripheral face between position 210 at adjacent magnetic is distributed less, plane 2111 is formed in this position, the less part of magnetic flux can be removed, high-magnetodensity can be carried, the weight of permanent magnet 21 can be reduced simultaneously;Simultaneously because the rotor assembly in the present embodiment is formed with permanent magnet 21 for insert injection moulding, the high temperature of injection can make permanent magnet demagnetize, so needing after rotor assembly injection molded permanent magnet 21 is magnetized again, plane 2111 can be offer location division of magnetizing so that the permanent magnet after magnetizing and the permanent magnet before injection have identical magnetic force to be distributed.
The long limit of plane 2111 is identical with the height of permanent magnet 21, about 1/3rd of length substantially cylindrical face 2112 arc length of the minor face of plane 2111, so can either improve magnetic flux density and magnetic flux will not be produced impact again.
Permanent magnet 21 also includes first end face the 213, second end face 214, first end face 213 is formed with four the first protruding blocks 2131, second end face 214 is formed with four the second protruding blocks 2141, first protruding block 2131 is different with the second protruding block 2141 shape, in the present embodiment, first protruding block 2131 is substantially round in shape, and the second protruding block 2141 is substantially in tetragon, and magnetropism concentration portion 210 is arranged by the first protruding block 2131 and the second protruding block 2141;Such protruding block is possible to prevent the upper and lower surface of permanent magnet 21 readily identified and location when magnetizing and install;Simultaneously at the rotor assembly 50 formed for injection inserts with permanent magnet 21, protruding block can limit the permanent magnet 21 rotation relative to injection molding body.
In the present embodiment, permanent magnet 21 is injection molded, and injected plastics material includes the iron powder of neodymium iron boron, by special processing technique, magnetic powder is arranged by the rule subscribed, and permanent magnet after injection 21 meets and is pre-designed requirement.Additionally permanent magnet can also pass through sinter molding.
Seeing Fig. 3, Fig. 4, Fig. 5, Fig. 7 and Fig. 8, rotor assembly 30 also includes that axle sleeve 9, axle sleeve 9 shape with lower cover 13 integrated injection molding of impeller, and the material of axle sleeve 9 is identical with the material of lower cover 9;Axle sleeve 9 is formed around impeller installing hole 136, axle sleeve 9 include by lower cover 13 around first paragraph, connect the second segment of the first end face 213 of the downside 132 of lower cover 13 and permanent magnet 21, and by permanent magnet 21 around the 3rd section;The inner peripheral surface of axle sleeve 9 is formed with groove structure 961, groove structure 961 is uniformly distributed along axle sleeve 9 inner peripheral surface, working media so can be made to enter between axle sleeve 9 and pump shaft 40, both contact surfaces are played lubrication, groove structure 961 is uniformly distributed simultaneously, so reduces rotor assembly 50 amount of unbalance in the running;The upper side of lower cover 13 is provided with connectivity slot 135, connectivity slot 135 connects setting with groove structure 961, the rotor assembly 50 axially-movable relative to pump shaft 40 is limited by jump ring 101 between rotor assembly 50 and the pump shaft 40 of the electric drive pump 100 of the present embodiment, friction plate 102 it is provided with between jump ring 101 and lower cover 13, so working media can play, by between connectivity slot 135 engaging friction sheet 102 and upper side 131, the effect reducing friction;Additionally, certain interval 3133 is formed between outer surface and the inner peripheral surface 212 of permanent magnet 21 of the 3rd section of axle sleeve 9, it is connected by dowel 3132 between outer surface and the inner peripheral surface 212 of permanent magnet 21 of the 3rd section of axle sleeve 9, so can save material, reduce cost, alleviate the weight of rotor assembly 50 simultaneously.
The shaping of rotor assembly 50 includes:
S1, part are processed;Including permanent magnet injection molded, permanent magnet forms the permanent magnet being roughly annular of polar anisotropic orientation by injection containing NdFeB material, and permanent magnet meets the table magnetic requirement being pre-designed;
The shaping of S2, Part I and Part II;Include the Part I of impeller upper cover plate and blade through being molded the material formation that mixes comprising PPS and glass, include axle sleeve and the Part II of impeller lower cover with permanent magnet 21 for being molded inserts through being molded the material formation that mixes comprising PPS and carbon fibre;
S3, the shaping of rotor assembly;The Part I and the Part II that shape in S2 are installed by the attachment structure of blade and back shroud, are integrated by ultrasonic bonding after installation;
S4, magnetizing, the rotor assembly of shaping magnetizes.Rotor assembly technique is shaped relatively easy by above step, easy for installation.
The permanent magnet wherein shaped in S1 step, including permanent magnet in the form of a ring, the outer peripheral face of permanent magnet is formed with plane spaced apart, and permanent magnet end is formed with variform protruding block, its midplane is arranged between adjacent N pole and S pole, and protruding block is arranged at N pole and the S pole correspondence position of correspondence.
The Part II wherein formed in step S2, first end face and second end face of permanent magnet are coated with injection molded layers, the top of the first protruding block and the second protruding block is not injection molding layer and covers, and the height of the thickness of injection molded layers and the first protruding block and the second protruding block projection is roughly the same.
Seeing Figure 13 to Figure 19, the electric drive pump 100 in the present embodiment also includes a radiating subassembly 80, and radiating subassembly 80 can be conducive to the heat radiation of electric-controlled plate 70, radiating subassembly 80 to be fixedly installed with electric machine casing 30;Electric machine casing 30 includes bottom sidewall of motor housing 301 and electric machine casing 302, the inner chamber of electric machine casing 30 includes 302 space surrounded bottom sidewall of motor housing 301 and electric machine casing, electric-controlled plate 70 is arranged at the inner chamber of electric machine casing, and radiating subassembly 80 includes the radiating part 81 being arranged at 302 outer surfaces bottom electric machine casing and is arranged at the heat-conducting part 82 of 302 inner surfacies bottom electric machine casing.
Electric machine casing 30 is provided with radiating subassembly installation portion 303, and radiating subassembly installation portion 303 includes a sector hole 3031, stage portion 3032 and protruding ring 3034;Sector hole 3031 is to be arranged at the through hole of 302 bottom electric machine casing;Stage portion 3032 is positioned at the outer surface of bottom electric machine casing 302 and arranges around sector hole 3031, and the step surface 3033 of stage portion 3032 is less than the outer surface of 302 bottom electric machine casing;Protruding ring 3034 is positioned at the inner surface of 302 bottom electric machine casing and arranges around sector hole 3031.
Radiating part 81 includes multiple fin 811 and the first metallic plate 812, first metallic plate 812 includes first surface 8121 and second surface 8122, fin 811 is fixed on the first surface 8121 of the first metallic plate 812, and the second surface 8122 of the first metallic plate 812 is connected with heat-conducting part 82 by bottom electric machine casing 302;The profile of the first metallic plate 812 is sector shape, and the periphery of the first metallic plate 812 is curved, and after radiating part 81 is installed on electric machine casing 30, the periphery of the first metallic plate 812 and sidewall of motor housing 301 can concordant settings or be slightly less than sidewall of motor housing 301 and arrange;The inner circumferential of the first metallic plate 812 is curved to be arranged substantially in parallel with periphery;The periphery arc length of the first metallic plate 812 is more than the arc length of the first metallic plate 812 inner circumferential;First metallic plate 812 is formed with radiating part installation portion, and radiating part installation portion includes covering of the fan lobe 8131, cylindrical projection portion 8132 and screwed hole 8136;Covering of the fan lobe 8131 forms in the lobe protruding from second surface of second surface 8122;Cylindrical projection portion 8132 forms in first surface 8121 and protrudes from the lobe of first surface 8121;Screwed hole 8136 gos deep into the screwed hole in cylindrical projection portion 8132 from covering of the fan lobe 8131, and screwed hole 8136 is blind hole;In the present embodiment, bottom the height of covering of the fan lobe 8131 substantially electric machine casing, the outer surface of 302 is to the thickness of the protruding ring 3034 of 302 inner surfacies bottom electric machine casing, fan-shaped lobe 8131 may be inserted into the sector hole 3031 of bottom electric machine casing 302, and gap is small between the two, limit rotation between the two;Cylindrical projection portion 8132 is two, and cylindrical projection portion 8132 is arranged between two adjacent dissipation backings and connects as one with the fin 811 being connected.
In the present embodiment, fin 811 is fixedly installed with the first metallic plate 812, fin 811 is in strip, fin 811 is from the inner circumferential arrangement multilamellar of outer circumferential first metallic plate 812 of the first metallic plate 812, interval between every layer of fin is roughly the same, ground floor is arranged near the first metallic plate 812 periphery, ground floor includes the first fin 8111, 4th layer is arranged near the first metallic plate 812 inner circumferential, 4th layer includes the 4th fin 8114, it is followed successively by the second layer and third layer between ground floor and the 4th layer, the second layer includes the second fin 8112, third layer includes the 3rd fin 8113;First fin 8111 width is maximum, and highly minimum, so design is in the case of ensureing area of dissipation, can improve the intensity of the first fin 8111, prevent the first fin 8111 to be broken off;nullOwing to being gradually reduced from the radian of the inner circumferential of outer thoughtful first metallic plate 812 of the first metallic plate 812,At the metal fin ensureing every layer of identical quantity of arranging,The width of metal fin 811 is gradually reduced,Simultaneously for ensureing roughly the same area of dissipation,Add the height of metal fin 811,The width of such second fin is less than the width of the first fin,The height of normal second fin 8112 is higher than the height of the first fin 8111,The width of the 3rd fin 8113 is less than the width of the second fin 8112,The height of normal 3rd fin 8113 is higher than the height of the second fin 8112,The width of the 4th fin 8114 is less than the width of the 3rd fin 8113,The height of the 4th fin 8114 is higher than the height of the 3rd fin 8113;It is provided with cylindrical projection portion 8132 between part the second fin and part the 3rd fin, cylindrical projection portion 8132 can cause the area of dissipation of this part to increase, and the so height of second, third fin of this part and height of the first fin 8111 is roughly the same.
nullRadiating subassembly 80 also includes heat-conducting part 82,Heat-conducting part 82 is arranged at the inner surface of 302 bottom electric machine casing,Heat-conducting part 82 includes the second metallic plate 821,The shape of the second metallic plate 821 is also sector shape,The outer rim of the second metallic plate 821 is less than protruding ring 3034 more than sector hole 3031,Second metallic plate 821 includes the first side 8211 and the second side 8212,First side 8212 of the second metallic plate 821 is arranged close to electric-controlled plate 70,Several pieces of components and parts projection in 302 directions bottom electric machine casing that the heating of electric-controlled plate 70 is bigger is positioned at the first region, side 8211 of the second metallic plate 821,The heat that the components and parts of electric-controlled plate 70 produce passes to the second metallic plate 821 by the upper surface of the second metallic plate 821,The metallic plate of the second metallic plate 821 generally aluminum,Heat-transfer effect is good;Components and parts and second metallic plate 821 of electric-controlled plate 70 have a certain distance, so on this segment distance, components and parts and second metallic plate 821 of electric-controlled plate 70 are conducted heat by air, in order to strengthen conductivity of heat, it is filled with heat-conducting glue between electric-controlled plate 70 and the second metallic plate 821, heat-conducting glue is non-conductive, and heat-conducting glue can be heat conductive silica gel;Described heat-conducting plate is the second metallic plate 821.
First side 8211 is provided with counterbore 86, and screw 88 can be less than the first side 8211 after installing, and so will not hinder the layout of components and parts on electric-controlled plate;Second side 8212 is provided with heavy stand portion 87, and counterbore 86 runs through heavy stand portion 87 and arranges, and heavy stand portion 87 is protruding certain height from the second side 8212, and the outer surface in heavy stand portion 87 is generally cylindrical, and screw 88 is connected through this counterbore 86 is fixing with the first metallic plate 812.
The covering of the fan lobe 8131 of the first metallic plate 812 is formed with depressed part 8135, depressed part 8135 includes arc surface, arc surface can coordinate with the outer surface in heavy stand portion 87, heavy stand portion 87 is made to may be inserted into depressed part 8135, in the present embodiment, heavy stand portion 87 and depressed part 8135 are two, the rotation between the first metallic plate 812 and the second metallic plate 821 can be limited after so heavy stand portion 87 inserts depressed part 8135, the bottom of depressed part 8135 is provided with screwed hole 8136, screwed hole extends in cylinder, but not through cylinder;Radiating subassembly 80 also includes a sealing ring 89, sealing ring 89 is arranged at bottom the second surface 8122 of the first metallic plate 812 and electric machine casing between the outer surface of 302, sealing ring 89 is arranged on the step surface 3033 of the outer surface of electric machine casing bottom surface 302, and sealing ring 89 is arranged around covering of the fan lobe 8131 periphery of the first metallic plate 812.
The shaping of radiating subassembly 80 includes: S1, the shaping of part: radiating part shapes, heat-conducting part shaping, the shaping of sealing ring and the shaping of radiating subassembly installation portion;
S2, the assembling of part, fix the radiating part of shaping, heat-conducting part, sealing ring with radiating subassembly installation portion;
S3, the filling of heat-conducting glue, radiating subassembly includes heat-conducting glue, is filled with heat-conducting glue between the second metallic plate and electric-controlled plate.
The radiating part that wherein S1 step shapes includes fin and the first metallic plate, and the first metallic plate includes that first surface, fin are fixed on the first surface of the first metallic plate, and the profile of the first metallic plate is sector shape, and the periphery of the first metallic plate is curved;First forming sheet metal has radiating part installation portion, radiating part installation portion to include covering of the fan lobe, cylindrical projection portion and screwed hole;Covering of the fan lobe forms in the lobe protruding from second surface of second surface;Cylindrical projection portion forms in first surface and protrudes from the lobe of first surface;Screwed hole gos deep into the screwed hole in cylindrical projection portion from covering of the fan lobe, and screwed hole is blind hole, and the covering of the fan lobe of the first metallic plate is formed with depressed part;
The heat-conducting part that wherein S1 step shapes includes the second metallic plate, the shape of the second metallic plate is sector shape, the outer rim of the second metallic plate is more than sector hole and less than protruding ring, second metallic plate includes the first side and the second side, first side of the second metallic plate is arranged close to electric-controlled plate, several pieces of components and parts that the heating of electric-controlled plate is bigger are positioned at the first region, side of the second metallic plate to the projection of electric machine casing bottom direction, and the first side is provided with counterbore;Second side is provided with heavy stand portion, and counterbore runs through heavy stand portion and arranges, and heavy stand portion is from the certain height of the second lateral projections, and the outer surface in heavy stand portion is generally cylindrical;
Wherein the shaping of the part of S1 step includes: electric machine casing is provided with radiating subassembly installation portion, and radiating subassembly installation portion includes a sector hole, stage portion and protruding ring;Sector hole is to be arranged at the through hole bottom electric machine casing;Stepped portions outer surface bottom electric machine casing is also arranged around sector hole, and the step surface of stage portion is less than the outer surface bottom electric machine casing;The inner surface that protruding ring is positioned at bottom electric machine casing is arranged around sector hole.
Wherein the assembling of the part of S2 step includes: sealing ring is placed in the stage portion of electric machine casing, the covering of the fan lobe of the first metallic plate inserts the sector hole of electric machine casing, second metallic plate is arranged at electric machine casing bottom interior surface, the heavy stand portion of the second metallic plate inserts the depressed part of the first metallic plate, connect the first metallic plate and the second metallic plate by screw through counterbore and screwed hole, and then the radiating subassembly that radiating part and heat-conducting part are formed is fixed with electric machine casing.
It should be understood that above example be merely to illustrate the present invention and and unrestricted technical scheme described in the invention, although this specification with reference to the above embodiments to present invention has been detailed description, but, it will be understood by those within the art that, the present invention still can be modified or equivalent by person of ordinary skill in the field, and all are without departing from the technical scheme of the spirit and scope of the present invention and improvement thereof, all should contain in scope of the presently claimed invention.

Claims (10)

1. a rotor assembly, described rotor assembly includes Part I and Part II, described first Dividing and described Part II shapes respectively, described Part I integrated injection molding shapes, described first Dividing and include impeller upper cover plate, blade, described upper cover plate shapes with described blade integrated injection molding, described upper cover Being formed with impeller inlet on plate, described blade is formed with the first connecting portion towards described Part II;Described Part II is injection molded, and described Part II includes impeller lower cover, rotor permanent magnet and axle sleeve, Described Part II is formed through injection with described rotor permanent magnet for inserts, and the injection molded layers of injection includes institute Stating lower cover and described axle sleeve, described lower cover is provided with the second connecting portion, institute towards described Part I State Part I and described Part II to be welded and fixed by described first connecting portion and described second connecting portion.
Rotor assembly the most according to claim 1, it is characterised in that: described first connecting portion includes Being arranged at the blade bottom protruding block protruding to described lower cover direction and raised item, described raised item is protruding The height height protruding less than described protruding block, the protruding height of described protruding block is less than or equal to after described The thickness of cover plate;Described second connecting portion includes the groove being arranged at back shroud upper surface, in described groove Being provided with striped protruding, be provided through the aperture of described back shroud in described groove, described protruding block is inserted Enter in the aperture of described back shroud.
Rotor assembly the most according to claim 1 and 2, it is characterised in that: described permanent magnet is pole Property anisotropy orientation, N pole and the S pole of described permanent magnet is alternately present in the circumferential direction, described N Pole and the magnetic concentration zones that position is described permanent magnet at place, described S pole;Described permanent magnet is substantially in ring Shape, described permanent magnet includes that inner peripheral surface and outer peripheral face, described inner peripheral surface are cylindrical, described periphery bread Including plane and the face of cylinder, described plane and the uniformly arrangement of interval, the described face of cylinder, the described face of cylinder includes institute Stating the described magnetic concentration zones of permanent magnet, described plane is arranged between adjacent described magnetic concentration zones.
Rotor assembly the most according to claim 3, it is characterised in that: described plane is substantially in rectangular Shape, the long limit of described plane is roughly the same with the height of described permanent magnet, and the minor face of described plane is substantially / 3rd of described face of cylinder arc length.
Rotor assembly the most according to claim 3, it is characterised in that: permanent magnet includes the first end face Be arranged substantially in parallel with the second end face, described first end face and described second end face, described first end face with All substantially vertical with the described outer peripheral face setting of described second end face, it is protruding that described first end face is provided with first Block, described second end face is provided with the second protruding block, and described injection molded layers covers described first end face and described Second end face, described first lobe and described second the thickness of described injection molded layers that formed of top be less than The thickness of the injection molded layers that the first end face and the second end face are formed.
Rotor assembly the most according to claim 5, it is characterised in that: described first protruding block and institute The shape stating the second protruding block is different, described first protruding block and described second protruding block corresponding to described forever The magnetic concentration zones of magnet is arranged, the quantity of described first protruding block and described second protruding block with described forever The N pole of magnet is identical with the sum of S pole.
7. according to the rotor assembly described in any one of claim 1-6, it is characterised in that: described axle sleeve leads to Crossing described injection molded layers to be formed, described axle sleeve includes top, middle part and bottom, the top of described axle sleeve with Described lower cover integrated injection molding shapes, the end on the top of described axle sleeve and the arc of described lower cover upper side The concordant setting in top in face;The bottom of described axle sleeve arranges between described permanent magnet upper surface and lower surface, The middle part of described axle sleeve connects downside and the upper surface of described permanent magnet of described lower cover.
Rotor assembly the most according to claim 7, it is characterised in that: described axle sleeve inner surface shapes Having at least two groove, described groove is uniformly distributed along described axle sleeve inner surface, and described groove runs through described The upper and lower surface of axle sleeve also connects setting with described inner hole of shaft sleeve, and described axle sleeve upper end is provided with groove Extension.
Rotor assembly the most according to claim 7, it is characterised in that: described sleeve outer surface and institute State the gap being formed with certain distance between permanent magnet, by even between described sleeve outer surface and permanent magnet Connect muscle to connect.
10. an electric drive pump, described electric drive pump includes pump shaft, rotor assembly, stator module, institute Stating rotor assembly to arrange near described pump shaft than described stator module, described pump shaft is fixedly installed, described turn Sub-component rotates around pump shaft, it is characterised in that: described rotor assembly is any one of claim 1 to 9 Described rotor assembly.
CN201510399082.6A 2015-07-06 2015-07-06 Rotor assembly and electric drive pump Active CN106321506B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108231321A (en) * 2017-12-20 2018-06-29 横店集团东磁股份有限公司 A kind of miniature electronic water pump rotor magnet and preparation method thereof
CN110856629A (en) * 2018-08-22 2020-03-03 日立环球生活方案株式会社 Electric fan and electric dust collector carrying the same
CN111237247A (en) * 2018-11-28 2020-06-05 杭州三花研究院有限公司 Rotor assembly and electric pump
CN111692126A (en) * 2019-03-15 2020-09-22 爱三工业株式会社 Centrifugal pump

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JP2010065528A (en) * 2008-09-08 2010-03-25 Nidec Shibaura Corp Pump
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CN102116312A (en) * 2011-03-09 2011-07-06 浙江新界泵业股份有限公司 Impeller for centrifugal pump
CN202121475U (en) * 2011-06-01 2012-01-18 宁波普尔机电制造有限公司 Disk type permanent magnet DC brushless motor
CN104214109A (en) * 2013-06-03 2014-12-17 浙江三花股份有限公司 Circulating pump

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010065528A (en) * 2008-09-08 2010-03-25 Nidec Shibaura Corp Pump
CN201797428U (en) * 2010-08-24 2011-04-13 常州曼淇威电气产品有限公司 Permanent magnet brushless direct current (DC) motor rotor
CN102116312A (en) * 2011-03-09 2011-07-06 浙江新界泵业股份有限公司 Impeller for centrifugal pump
CN202121475U (en) * 2011-06-01 2012-01-18 宁波普尔机电制造有限公司 Disk type permanent magnet DC brushless motor
CN104214109A (en) * 2013-06-03 2014-12-17 浙江三花股份有限公司 Circulating pump

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108231321A (en) * 2017-12-20 2018-06-29 横店集团东磁股份有限公司 A kind of miniature electronic water pump rotor magnet and preparation method thereof
CN110856629A (en) * 2018-08-22 2020-03-03 日立环球生活方案株式会社 Electric fan and electric dust collector carrying the same
CN111237247A (en) * 2018-11-28 2020-06-05 杭州三花研究院有限公司 Rotor assembly and electric pump
CN111692126A (en) * 2019-03-15 2020-09-22 爱三工业株式会社 Centrifugal pump

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