CN107725392A

CN107725392A - Electronic pump

Info

Publication number: CN107725392A
Application number: CN201610658710.2A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Automotive Components Co Ltd
Current assignee: Zhejiang Sanhua Automotive Components Co Ltd
Priority date: 2016-08-11
Filing date: 2016-08-11
Publication date: 2018-02-23
Anticipated expiration: 2036-08-11
Also published as: CN107725392B

Abstract

A kind of electronic pump, including rotor assembly, rotor assembly includes rotor and impeller, impeller includes upper cover plate, lower cover and blade, blade is formed between upper cover plate and lower cover, blade includes the first blade and the second blade, the outward flange for defining upper cover plate is the first circumference, second blade originates in the second circumference, a diameter of first diameter of first circumference, a diameter of Second bobbin diameter of second circumference, Second bobbin diameter is equal to 0.6 times to 0.7 times of the first diameter, first blade originates in the 3rd circumference, a diameter of 3rd diameter of 3rd circumference, the lower cover of impeller is formed with balance pipe, balance pipe is centrally located at the 4th circumference, a diameter of 4th diameter of 4th circumference, 4th diameter is less than Second bobbin diameter more than the 3rd diameter；The pressure of both sides above and below lower cover is so balanced, reduces the axial force of the upward motion of rotor assembly, is advantageous to limit element and reduces abrasion, improve the life-span of electronic pump.

Description

Electronic pump

【Technical field】

The present invention relates to a kind of heat circulating system, and in particular to a kind of electronic pump.

【Background technology】

In recent decades, electronic pump substitutes traditional mechanical pump gradually, and is largely applied in heat circulating system. Electronic pump has without electromagnetic interference, high-efficiency environment friendly, the advantages that stepless speed regulation, is well positioned to meet the requirement in market.

Electronic pump includes rotor assembly, and rotor assembly includes impeller and rotor, and impeller and rotor rotate around pump shaft, along pump The axial impeller of axle is spacing by stopping means, but in electronics pump operation, rotor assembly can cause the abrasion of stopping means Even disabler.

Therefore, it is necessary to existing technology is improved, to solve above technical problem.

【The content of the invention】

It is an object of the invention to provide a kind of electronic pump, can improve the abrasion of limiting section, improves the use of electronic pump Life-span.

To achieve the above object, the present invention adopts the following technical scheme that：A kind of electronic pump, including pump case, pump shaft, rotor Component and limiting section, for the pump case formed with pump inner chamber, the rotor assembly is arranged at the pump inner chamber, the limiting section Limit the rotor assembly to be fixedly installed with the pump case in the position of the pump inner chamber, one end of the pump shaft, the pump The other end cantilever of axle stretches into the pump inner chamber, and the rotor assembly is sheathed on the pump shaft outer peripheral face, the rotor assembly energy Enough rotated around the pump shaft, the rotor assembly of stating includes rotor and impeller, and the rotor is fixedly connected with impeller, described turn Attached bag includes permanent magnet, and the impeller includes upper cover plate, lower cover and blade, and the blade forms in the upper cover plate and described Between lower cover, the blade includes the first blade and the second blade, and the length of first blade is more than second blade Length, first blade and second spacing with blades distribution, the outward flange for defining the upper cover plate is the first circumference, institute To state a diameter of first diameter of the first circumference, define one second circumference, second blade originates in the second circumference, and described second A diameter of Second bobbin diameter of circumference, the Second bobbin diameter are equal to 0.6 times to 0.7 times of first diameter, define one the 3rd circle Week, first blade originate in the 3rd circumference, a diameter of 3rd diameter of the 3rd circumference, the lower cover of the impeller Plate is formed with balance pipe, defines one the 4th circumference, and the balance pipe is centrally located at the 4th circumference, the diameter of the 4th circumference For the 4th diameter, the 4th diameter is more than the 3rd diameter and the 4th diameter is less than the Second bobbin diameter.

Compared with prior art, impeller of the invention includes upper cover plate, blade and lower cover, and lower cover is formed with balance Hole, the pressure of both sides above and below lower cover is so balanced, reduces the axial force of the upward motion of rotor assembly, is advantageous to limit element Abrasion is reduced, improves the life-span of electronic pump.

【Brief description of the drawings】

Fig. 1 is a kind of cross section structure schematic diagram of electronic pump；

Fig. 2 is the decomposition texture schematic diagram of the rotor assembly of electronic pump；

Fig. 3 is a cross section structure schematic diagram of rotor assembly in Fig. 1；

Fig. 4 is a cross section structure schematic diagram of Part II in Fig. 2；

Fig. 5 is a kind of structural representation of limit element in Fig. 1；

Fig. 6 is a positive structure schematic of the Part I of rotor assembly in Fig. 3；

Fig. 7 is a positive structure schematic of Part II in Fig. 2.

【Embodiment】

The invention will be further described with specific embodiment below in conjunction with the accompanying drawings：

Fig. 1 is a kind of structural representation of embodiment of electronic pump 100, and electronic pump 100 includes pump case, pump case physical efficiency Enough form pump inner chamber, in the present embodiment, pump case includes pump cover 10, separation sleeve 20, electric machine casing 30；In the present embodiment, pump cover 10th, separation sleeve 20 and electric machine casing 30 distinguish injection molded, pump cover 10 and separation sleeve 20 and separation sleeve 20 and electric machine casing 30 are fixedly connected by screw 120 or bolt, in the junction and separation sleeve 20 of pump cover 10 and separation sleeve 20 and motor casing The junction of body 30 is provided with sealing ring 130, can so improve the sealing of junction；Separation sleeve 20 separates pump inner chamber For wet chamber 91 and dry chamber 92, there can be working media to flow through in wet chamber 91, dry chamber 92 flows through without working media；Certain pump case Can be other structures, the structure of the pump case used in the present embodiment, manufacturing process is relatively easy, the assembling side of parts Just.Electronic pump 100 in the present embodiment is mainly used in heat circulating system, heat circulating system include cooling recirculation system and/or Heating circulation system, electronic pump 100 are used to provide circulation power to circulatory mediator.Electronic pump 100 in the present embodiment can answer For in vehicle cooling recirculation system.Electronic pump 100 in the present embodiment can apply to small size, the field of high-lift demand Close.

Electronic pump 100 also includes pump shaft 40, rotor assembly 50, stator module 60, control unit 70；Rotor assembly 50 is set In wet chamber 91, stator module 60 and control unit 70 are arranged at dry chamber 92；Pump shaft 40 is fixed with separation sleeve 20 through injection, rotor set Part 50 can rotate around pump shaft 40, and rotor assembly 50 includes impeller 5 and rotor 4, and rotor 4 includes permanent magnet 41, rotor assembly 50 are separated with stator module 60 by separation sleeve 20, and stator module 60 electrically connects with control unit 70, and control unit 70 passes through company Wiring and external power source or signal circuit etc. electrically connect.In the present embodiment, electronic pump 100 is inner-rotor-type electronic pump, internal rotor Formula electronic pump refers to that the permanent magnet of rotor assembly 50 is set than stator module 60 closer to pump shaft 40.

Rotor assembly 50 comprises at least two parts moulding：Part I 501 and Part II 502.The He of Part I 501 Part II 502 is by being welded and fixed, as ultrasonic bonding is fixed.Part I 501 includes upper cover plate 51 and blade 52, and first The shaping of part 501 integrated injection molding, in one of which embodiment injected plastics material be include polyphenylene sulfide plastic (abbreviation PPS plastics) and The mixture of glass fibre；Part II 502 includes lower cover 53, permanent magnet 41 and clutch shaft bearing 42, and Part II 502 wraps Include and be molded with permanent magnet 41 and clutch shaft bearing 42 for the rotor including injection molded layers that injection inserts is formed by injection injected plastics material Part, the injected plastics material of injection molded layers includes polyphenylene sulfide plastic (abbreviation PPS plastics) and glass fibre in one of which embodiment Mixture, the injected plastics material of injection molded layers can also be the relatively good thermoplastic of other mechanical performances in addition.First Points 501 and Part II 502 be integrated by being welded and fixed.

Electronic pump 100 also includes the limiting section of rotor assembly, rotor assembly 50 is limited in into pump inner chamber by limiting section, especially It is by the sports limiting of rotor assembly in the range of the correspondence position of pump inner chamber.Limiting section includes pump shaft 40, the first limiting section 1 With the second limiting section 2, specifically, rotor assembly 50 is arranged at the periphery of pump shaft 40, and then pump shaft 40 limits rotor assembly 50 Center position, the first limiting section 1 are used to limit the upper end position of rotor assembly 50, and specifically, the first limiting section 1 is used to limit The movement position of the import because of axial force and along pump shaft 40 to electronic pump 100 on startup of rotor assembly 50.Second limiting section 2 is used In the lower end position of limitation rotor assembly 50, specifically the second limiting section 2 is for limiting when rotor assembly 50 stops operating along pump Fixing end movement position of the axle 40 to pump shaft 40.First limiting section 1 and the second limiting section 2 are fixedly installed relative to pump shaft 40, the One limiting section 1 and the second limiting section 2 can limit position of the rotor assembly 50 relative to pump shaft 40.So, the first limiting section and Second limiting section is fixedly installed relative to pump shaft, it is possible to reduce abrasion of the pump shaft to the first limiting section and the second limiting section, also may be used To reduce the noise of relative motion, be advantageous to improve the service life of product.

First limiting section 1 includes limit element 11 and connecting element 12, and connecting element 12 is connected with pump shaft 40, limit element 11 are fixed by connecting element 12 and pump shaft 40, and limit element 11 stops rotor assembly 50 along the moved axially upward of pump shaft 40 Distance and the position stopped so that the distance of the maximum axial motion to pump shaft free end of rotor assembly 50 is no more than spacing member The fixed position of the place pump shaft 40 of part 11.

Referring to Fig. 5, limit element 11 is made up of metal material, and it has certain thickness and hardness, limit element 11 into Shape has centre bore 110, and limit element 11 includes upper surface 111 and lower surface 112, and upper and lower end face is by surface treatment, to subtract The coefficient of friction of small upper and lower end face, or at least surface treated of lower surface 112, so, in electronics pump work, can subtract Few frictional force between rotor assembly 50 and limit element 11, usually the surface roughness of its lower surface 112 is less than 1.6, originally In embodiment, in order to prevent setup error, the surface roughness of upper and lower end face is respectively less than 1.6；The centre bore 110 of limit element 11 Fixed for connecting element 12 by and with pump shaft 40；In order to reduce the abrasion of limit element 11, at least lower surface 112 is coated with class The coating of diamond, in order to prevent setup error, upper surface 111 and lower surface 112 can apply the coating of DLC.

Connecting element 12 includes screw, and screw has coordinates the planar portions contacted with limit element upper surface 111；Pump shaft 40 Including connecting portion, connecting portion is used to be connected with connecting element 2, and connecting portion includes screwed hole 4011；Pump shaft 40 is formed with spiral shell Pit 4011, axially the extending to the inside of pump shaft 40 from free end along pump shaft 40 of screwed hole 4011, screw and screwed hole 4011 Limit element 11 is pressed in the free end of pump shaft 40, limit element 11 is fixedly connected with pump shaft 40 by threaded connection, screw.

Pad 58 is provided between second limiting section 2 and rotor assembly, advantageously reduces rotor assembly and second spacing The impact wear in portion.

Impeller 5 includes upper cover plate 51, lower cover 53 and blade 52, blade 52 be arranged at upper cover plate 51 and lower cover 53 it Between, in the present embodiment, blade 52 includes the first blade 521 and the second blade 522, and the length of the first blade 521 is more than the second leaf The length of piece 522, the first blade 521 and the second blade 522 are intervally arranged, and impeller 5 includes four the first blades 521 and four the Two blades 522, the outward flange for defining upper cover plate 51 or lower cover 53 are the first circumference, a diameter of first diameter of phi of the first circumference 1, the second blade 522 originates in the second circumference, and it is straight that a diameter of Second bobbin diameter Φ 2 of the second circumference, Second bobbin diameter Φ 2 are equal to first 0.6 times to 0.7 times of footpath Φ 1.First blade 521 includes first side 733 and second side 744, and first side 733 is recessed Face, second side 744 are convex surface；Define one the 3rd circumference, a diameter of 3rd diameter of phi 3 of the 3rd circumference, the starting of the first blade In the 3rd circumference, the 3rd diameter of phi 3 is less than Second bobbin diameter Φ 2.

In the present embodiment, blade 52 shapes with the integrated injection molding of upper cover plate 51, and lower cover 53 is provided with mounting groove 532, installs Corresponding first blade 521 of groove 532 is set, and each mounting groove 532 includes concave side 533 and convex side 534, and concave side 533 is right The second side 733 of the first blade 521 should be corresponded in the first side 733 of the first blade 521, convex side 534.First blade Installation corresponding with mounting groove, the first blade 521 is welded and fixed with lower cover 53 to be integrated.

In order to further balance the axial force at the both ends of rotor assembly 50, the mill of the limit element 11 of the first limiting section 1 is reduced Damage, the lower cover 53 of impeller 5 are formed with balance pipe 531, and balance pipe 531 can connect the both sides up and down of lower cover 53, make lower cover The pressure differential of the both sides up and down of plate 53 reduces, and advantageously reduces the active force that rotor assembly 50 moves upwards, is advantageous to rotor set Part reduces the abrasion of limit element 11.

Defining one the 4th circumference, balance pipe 531 is centrally located at the 4th circumference, there is multiple balance pipe in the present embodiment, and A diameter of 4th diameter of phi 4 of four circumference, the 4th diameter of phi 4 is more than the 3rd diameter of phi 3 and the 4th diameter of phi 4 is straight less than second Footpath Φ 2；So balance pipe is arranged between the first adjacent blade 521 and the area of the 3rd circumference and the second circle diameter as far as possible In domain, the influence of flowing of the balance pipe to impeller working media is advantageously reduced.

The quantity of balance pipe 531 is more than or equal to two, and total circulation area of balance pipe 531 is equal to each balance pipe 531 Circulation area sum, annular gap 301 is formed between the outward flange of impeller 5 and housing, working media is by annular gap 301, to the working media formed with annular flow sectional area, total circulation area of balance pipe 531 is equal to should for annular gap 301 5 times to 8 times of annular flow sectional area.During electronics pump work, working media enters impeller, and working media is by annular gap 301 enter the wet chamber of the lower section of lower cover 53, and such annular gap 301 connects the wet chamber and lower cover of lower cover more than 53 below 53 Wet chamber, because outer peripheral pressure of the working media from the center of impeller 5 to impeller gradually increases, such lower cover is below 53 Wet chamber pressure it is roughly the same with 5 outer peripheral pressure of impeller, the pressure of wet chamber of such lower cover below 53 is more than lower cover Wet cavity pressure more than plate, due to the effect of pressure differential, impeller 5 takes rotor assembly to and moved to the free extreme direction of pump shaft, this In embodiment, ensure that total circulation area of balance pipe 531 is more than or equal to the annular flow sectional area, at annular flow section Working medium pressure it is bigger than the pressure of the working media at balance pipe place, in order to further reduce pressure difference, balance pipe can be increased Total circulation area.So design advantageously reduces pressure differential, reduces the pressure that rotor assembly moves to the free extreme direction of pump shaft Power, and then the power suffered by the first limiting section is reduced, reduce abrasion.Specifically, total circulation area of balance pipe 531 is more than or equal to 3mm²Less than or equal to 18mm².Impeller 5 includes 4 balance pipes 531, and the flow area of balance pipe 531 is generally circular, each described The circulation area of balance pipe 531 is more than 1.7mm²Less than 3.2mm²；The connection of working media was so both ensured, and can ensures work Medium is unaffected in the circulation of adjacent blade.

After impeller assembling, balance pipe 531 is arranged between adjacent first blade 521, and specifically, balance pipe 531 is arranged at Between adjacent fitting grooves 532, the outer rim distance of balance pipe 531 and balance pipe 531 closer to mounting groove 532 concave side 533 Distance be more than or equal to 1mm.Further, when balance pipe 531 being projected into corresponding upper cover plate 51, along impeller 5 axially from upper The lower end of cover plate 51 end face direction upwardly, the initiating terminal S of the second blade 522 and the center O of impeller line form First Line Section SO, the first blade 521 initiating terminal F adjacent with the concave side of the second blade 522 and impeller 5 center O form second line segment FO, the center P and impeller central O of balance pipe 531 line forms the 3rd line segment PO, the second circumference and close with balance pipe the The intersection point C and impeller central O of the first side of one blade line form the 4th line segment CO, the first line segment SO and the 4th line segment CO Between angle be the first angle α, the 3rd line segment PO and second line segment FO angle is the second angle β, and the second angle β is less than the One angle α.

It should be noted that：Above example is merely to illustrate the present invention and not limits technical side described in the invention Case, although this specification with reference to the above embodiments to present invention has been detailed description, the common skill of this area Art personnel should be appreciated that person of ordinary skill in the field still can modify or equivalent substitution to the present invention, and All do not depart from the technical scheme of the spirit and scope of the present invention and its improvement, all should cover in scope of the presently claimed invention It is interior.

Claims

1. a kind of electronic pump, including pump case, pump shaft, rotor assembly and limiting section, the pump case is formed with pump inner chamber, institute State rotor assembly and be arranged at the pump inner chamber, the limiting section limits the rotor assembly in the position of the pump inner chamber, its spy Sign is：One end of the pump shaft is fixedly installed with the pump case, and the other end cantilever of the pump shaft stretches into the pump inner chamber, The rotor assembly is sheathed on the pump shaft outer peripheral face, and the rotor assembly can surround the pump shaft and rotate, described to state rotor Component includes rotor and impeller, and the rotor is fixedly connected with impeller, and the rotor includes permanent magnet, and the impeller includes upper lid Plate, lower cover and blade, the blade are formed between the upper cover plate and the lower cover, and the blade includes the first leaf Piece and the second blade, the length of first blade are more than the length of second blade, first blade and described second Spacing with blades is distributed, and the outward flange for defining the upper cover plate is the first circumference, and a diameter of first diameter of first circumference is fixed Adopted one second circumference, second blade originate in the second circumference, a diameter of Second bobbin diameter of second circumference, and described second Diameter is equal to 0.6 times to 0.7 times of first diameter, defines one the 3rd circumference, and first blade originates in the described 3rd Circumference, a diameter of 3rd diameter of the 3rd circumference, the lower cover of the impeller are formed with balance pipe, define one the 4th circle Week, the balance pipe are centrally located at the 4th circumference, a diameter of 4th diameter of the 4th circumference, and the 4th diameter is more than 3rd diameter and the 4th diameter is less than the Second bobbin diameter.

2. electronic pump according to claim 1, it is characterised in that：The quantity of the balance pipe is described more than or equal to two Total circulation area of balance pipe is equal to the circulation area sum of each balance pipe, between the outward flange of the impeller and the housing Annular gap is formed, the annular gap is to the working media formed with annular flow sectional area, total stream of the balance pipe Logical area is more than or equal to the annular flow sectional area.

3. electronic pump according to claim 1, it is characterised in that：The quantity of the balance pipe is described more than or equal to two Total circulation area of balance pipe is equal to the circulation area sum of each balance pipe, and total circulation area of the balance pipe is more than or equal to 3mm²Less than or equal to 18mm²。

4. electronic pump according to claim 3, it is characterised in that：The blade includes four first blades and four Second blade, the impeller include four balance pipes, the balance pipe be arranged at adjacent first blade it Between, the flow area of the balance pipe is circular, and the circulation area of each balance pipe is more than or equal to 1.7mm²It is less than Equal to 3.2mm²。

5. according to the electronic pump described in any one of Claims 1-4, it is characterised in that：First blade and the upper cover plate One is fixed, and the lower cover is provided with mounting groove, and the mounting groove is correspondingly arranged with first blade, and the balance pipe is set Be placed between the adjacent mounting groove, with the balance pipe closer to a mounting groove concave side apart from the balance pipe Outer peripheral distance be more than or equal to 1mm.

6. electronic pump according to claim 5, it is characterised in that：Along impeller axially from the lower end of the upper cover plate towards Upper surface direction, the balance pipe is projected on the upper cover plate, in the initiating terminal and the impeller of second blade The line of the heart forms the first line segment, the first blade initiating terminal adjacent with the concave surface of second blade and the impeller It is centrally formed second line segment, the line at the center of the balance pipe and the center of the impeller forms the 3rd line segment, and described second Circumference and the intersection point of the first side of close first blade of the balance pipe and the line shape of the impeller central Into the 4th line segment, the angle between first line segment and the 4th line segment is the first angle, the 3rd line segment with it is described The angle of second line segment is the second angle, and second angle is less than first angle.

7. according to the electronic pump described in any one of claim 1 to 6, it is characterised in that：The limiting section includes the first limiting section With the second limiting section, first limiting section limits side of the rotor assembly along the pump axially away from the pump shaft fixed part To movement, second limiting section limits direction of the rotor assembly along the pump shaft to the pump shaft fixed part and moved, institute State the first limiting section to be fixedly installed with the free end, second limiting section is fixedly installed with the pump shaft fixed part；It is described First limiting section is set with respect to the second limiting section close to the free end.

8. electronic pump according to claim 7, it is characterised in that：First limiting section includes screw and limit element, The screw is connected with the pump shaft, and the limit element is fixed by the screw with the free end, the spacing member Part is between the planar portions of the screw and the end of the free end.

9. electronic pump according to claim 8, it is characterised in that：The limit element includes upper surface and lower surface, institute State upper surface to contact with the screw, the lower surface is set with the free end in contact, at least described limit element lower surface Surface roughness be less than 1.6.

10. electronic pump according to claim 9, it is characterised in that：The limit element includes coating, at least described spacing Lower surface be coated with the coating, the material of the coating is DLC.