CN106151055B

CN106151055B - Electric drive pump

Info

Publication number: CN106151055B
Application number: CN201510136752.5A
Authority: CN
Inventors: 程小波
Original assignee: Zhejiang Sanhua Automotive Components Co Ltd
Current assignee: Zhejiang Sanhua Automotive Components Co Ltd
Priority date: 2015-03-26
Filing date: 2015-03-26
Publication date: 2019-06-07
Anticipated expiration: 2035-03-26
Also published as: CN106151055A

Abstract

A kind of electric drive pump includes pump cover, the pump housing, impeller, rear cover, pump shaft, motor part and electronic control unit, pump cover and the fixed impeller cavity formed for accommodating impeller of the pump housing；The pump housing and fixed the first accommodating chamber for forming receiving motor part of rear cover；Rotor and impeller can rotate；Electric drive pump further includes a separation sleeve, and the first accommodating chamber is divided into bore of stator and rotor chamber by separation sleeve, and bore of stator is not connected to impeller cavity, rotor chamber is directly or indirectly connected to impeller cavity, bore of stator is arranged than rotor chamber closer to pump shaft, and stator is set in bore of stator, and rotor is set in rotor chamber；One end of separation sleeve is wholely set with the pump housing or rear cover, reduces components, while ease of assembly.

Description

Electric drive pump

[technical field]

The present invention relates to a kind of centrifugal pumps, and in particular to a kind of electric drive pump.

[background technique]

In recent decades, automobile industry is grown rapidly, more reliable as automotive performance is towards safer, more stable, it is complete from Dynamic intelligent and environmental protection and energy saving direction is developed.Electric drive pump replaces traditional mechanical pump gradually, and is largely applied to vehicle With in heat dissipation circulating system.Electric drive pump is with no electromagnetic interference, the advantages that high-efficiency environment friendly, stepless time adjustment, is well positioned to meet The requirement in market.

The stator module and rotor assembly of electric drive pump are completely isolated by separation sleeve, and it is brushless straight to avoid traditional electric motor type Flowing water pumps existing fluid leakage problems；Currently, in order to improve the dismounting maintenance of electric drive pump while guarantee the close of electric drive pump Feng Xing is provided with multiple groups sealing ring, so that electric drive pump is needed while pay attention to the sealing of multiple sealing rings in assembly, is unfavorable for pacifying Dress.

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

[summary of the invention]

The purpose of the present invention is to provide a kind of structure is simple, easy to disassemble and assembling electric drive pump.

To achieve the above object, the present invention adopts the following technical scheme: a kind of electric drive pumps, including pump cover, the pump housing, leaf Wheel, rear cover, pump shaft, motor part and electronic control unit, the pump cover and pump housing fixation are formed for accommodating the impeller Impeller cavity；The pump housing and rear cover fixation form the first accommodating chamber for accommodating the motor part；The motor part Including stator and rotor, the rotor drives the wheel rotation by pump shaft；The electric drive pump further includes a separation sleeve, institute It states separation sleeve and first accommodating chamber is divided into bore of stator and rotor chamber, the relatively described bore of stator of the rotor chamber is close to described Pump shaft, the bore of stator are not connected to the impeller cavity, and the rotor chamber is directly or indirectly connected to the impeller cavity, described Stator is set in the bore of stator, and the rotor is set in the rotor chamber；The electronic control unit and the motor part Cooperating, the electronic control unit control the operation of the motor part；One end of the separation sleeve and the pump housing or institute It states rear cover to be wholely set, the free end of the separation sleeve is limited simultaneously by the pump housing or rear cover not being wholely set with the separation sleeve Opposing seal chamber is formed, prevents the working media in the rotor chamber from intervening the bore of stator.

The separation sleeve is metal material, and part forms the pump housing and separation sleeve by injection molding based on the separation sleeve Part joined integrally, the pump housing includes top and side wall, and the separation sleeve and the top are fixedly installed, the top it is interior Side is formed with the first bearing mounting base of the first bearing of pump shaft described in limited support；First bearing mounting base includes the first ring Shape protrusion, the medial surface of the first annular protrusion and the outer peripheral surface tight fit of the first bearing are arranged.

The mounting portion of the rear cover setting is fixed in the free end of the separation sleeve, and the rear cover includes upper surface and following table Face, the upper surface of the rear cover are provided with the second annular protrusion and third convex annular to the first accommodating chamber internal protrusion It rises, the mounting portion includes the groove formed between adjacent annular protrusion, and second ring is inserted into the free end of the separation sleeve Shape protrusion outer peripheral surface and the third annular protrusion inner peripheral surface are formed in groove, and are formed by extruding ring type seal relatively close Envelope.

The electric drive pump includes the first bearing and second bearing for limiting or supporting the pump shaft, the rear cover Upper surface is provided with the second bearing mounting base for accommodating the second bearing, and the second bearing mounting base includes described The outer surface tight fit of second ring protrusion inner peripheral surface, the second annular protrusion inner peripheral surface and the second bearing is arranged.

The electric drive pump includes the first bearing and second bearing for limiting or supporting the pump shaft；The separation sleeve For metal material, part forms the part joined integrally of the rear cover Yu the separation sleeve by injection molding based on the separation sleeve, The separation sleeve is set to the upper surface of the rear cover, and the rear cover is formed with first bearing mounting base, the first bearing peace Dress seat is for accommodating the first bearing；The first bearing mounting base includes the first ring for forming in the upper surface of the rear cover The inner peripheral surface tight fit of shape protrusion, the outer surface of the first bearing and the first annular protrusion is arranged.

The mounting portion of pump housing setting is fixed in the free end of the separation sleeve, and the pump housing includes top and side wall, The mounting portion is set to the top, and the top is provided with the second annular protrusion protruded to the inside of first accommodating chamber With third annular protrusion, the mounting part includes the groove formed between adjacent annular protrusion, the freedom of the separation sleeve The second annular protrusion outer peripheral surface is inserted at end and the third annular protrusion inner peripheral surface is formed in groove, and by squeezing annular Sealing ring forms sealing.

The inner surface at the top is provided with the second bearing mounting base of the second bearing for accommodating, the second bearing Mounting base includes the second annular protrusion inner peripheral surface, the outer surface of the second annular protrusion inner peripheral surface and the second bearing Tight fit setting.

The separation sleeve is plastic material, and the rear cover is plastic material, and the separation sleeve is once infused with the rear cover Modeling or quadric injection mould form integral structure, and the free end of the separation sleeve is inserted into the groove of the pump housing setting, by described The fixed part of pump housing setting is fixed.

The first annular protrusion protruded to first accommodating chamber and the second annular protrusion, the fixation is arranged in the pump housing Portion includes the groove between the first annular protrusion and second annular protrusion, described in the free end insertion of the separation sleeve In groove, it is provided between the bottom of the groove and the free end of the separation sleeve and exists in interconnecting piece setting ring type seal Interconnecting piece between the free end of the separation sleeve and the bottom portion of groove forms sealing.

First bearing mounting base is arranged in the rear cover, and the pump housing is provided with second bearing mounting base, the first bearing It is installed on the first bearing mounting base, the second bearing is installed on the second bearing mounting base, outside the first bearing Circumferential surface and the first bearing mounting base tight fit, the second bearing outer peripheral surface and the second bearing mounting base tight fit, The pump shaft and the first bearing medial surface and the medial surface of the second bearing are respectively formed tight fit.

Compared with prior art, the present invention is by the way that separation sleeve and rear cover or the pump housing to be wholely set, it is possible to reduce sealing The quantity of circle, while guaranteeing the detachability of electric drive pump, maintenance cost is reduced, the service life of pump can be extended.

[Detailed description of the invention]

Fig. 1 is the structural schematic diagram of the first embodiment of electric drive pump；

Fig. 2 is the schematic perspective view of the pump housing of electric drive pump shown in FIG. 1；

The schematic cross-sectional view of Fig. 3 pump housing shown in Fig. 2；

Fig. 4 is the schematic cross-sectional view of the rear cover of electric drive pump shown in FIG. 1；

Fig. 5 is the structural schematic diagram of the upper surface of rear cover shown in Fig. 4；

Fig. 6 is the structural schematic diagram of second of embodiment of electric drive pump；

Fig. 7 is pump housing schematic cross-sectional view shown in fig. 6；

Fig. 8 is rear cover schematic cross-sectional view shown in fig. 6.

[specific embodiment]

The present invention will be further explained below with reference to the attached drawings and specific examples:

Fig. 1 to Fig. 5 is the structural schematic diagram of the first embodiment of electric drive pump 100, and electric drive pump 100 includes pump cover 1, the pump housing 2, rear cover 3, end cap 4, separation sleeve 5, impeller 6, stator 71, rotor 72, pump shaft 8, electronic control unit 9；Pump cover 1 and the pump housing 2 Removably, which is connected and fixed and passes through sealing ring, forms opposing seal structure in connecting portion, in the present embodiment by bolt or The connection of the engagement threads such as screw；Impeller cavity 10 is formed after pump cover 1 and the pump housing 2 are fixed, impeller cavity 10 is provided with inlet and outlet, this Impeller 6 is set to inside impeller cavity 10 in embodiment, and impeller is also possible to main body and is located inside impeller cavity；The pump housing 2 and rear cover 3 are logical It crosses bolt etc. to be threadedly coupled and form opposing seal structure in connecting portion by sealing ring, the pump housing 2 and rear cover 3 be fixed to form the One accommodating chamber 20, the first accommodating chamber 20 is for accommodating stator 71 and rotor 72 etc.；Separation sleeve 5 by the first accommodating chamber 20 be divided into Impeller cavity is not connected to the bore of stator 201 flowed through to no working media and the rotor chamber 202 that can have working media to flow through, stator 71 are set to bore of stator 201, and rotor 72 is set to rotor chamber 202；Pump shaft 8 passes through the pump housing 2 and the limit of rear cover 3 or support, pump shaft 8 It protrudes into the end inside impeller cavity 10 and impeller 6 to be fixedly installed, pump shaft 8 is located at part inside rotor chamber 202 and rotor 72 is consolidated Fixed setting, rotor 72 can rotate under the action of the electromagnetic force of electric drive pump and pump shaft 8 driven to rotate, 8 impeller 6 of pump shaft Rotation.The second accommodating chamber 30 is formed between rear cover 3 and end cap 4, electronic control unit 9 is set in the second accommodating chamber 30；Electronic control unit 9 Including the electric elements on circuit board and circuit board, electronic control unit 9 is connect by lead with external circuit, and electronic control unit 9 is logical Lead is crossed to connect with stator 71.In the present embodiment, sealing ring is arranged in the coupling part between pump cover 1 and the pump housing 2, and the pump housing 2 is with after Sealing ring is arranged in coupling part between lid 3, coupling part setting sealing ring and separation sleeve 5 between rear cover 3 and end cap 4 Free end and mounting surface between be provided with sealing ring, above-mentioned sealing ring is used to guarantee the opposing seal of coupling part, certainly There can be other sealing means, for example weld, the leakproofness enhancing of welding；It is only in split type structure but with respect to welding manner The structure of vertical element is more advantageous to detaching products maintenance.

As shown in Figure 1, forming impeller cavity 10 between pump cover 1 and the pump housing 2, when electric drive pump 100 works, impeller 6 can be in leaf Centrifugal movement is done in wheel chamber 10, so that the operating pressure into the working media of impeller cavity 10 increases, is provided on pump cover 1 and leaf The influent stream pipe 11 and outflow tube (not shown) that chamber 10 is connected to are taken turns, influent stream pipe 11 and impeller cavity 10 are flowed out by inlet communication Pipe 12 and impeller cavity 10 pass through outlet；When electric drive 100 work of pump, working media enters impeller cavity 10 from influent stream pipe 11, Impeller 6 does centrifugal movement under the drive of pump shaft 8, and working media pressure rise and passes through under the action of impeller 6 in exit Outflow tube outflow.

As shown in Figure 1, opposing seal forms the first accommodating chamber 20 between the pump housing 2 and rear cover 3, separation sleeve 5 is accommodated first Chamber 20 is divided into the rotor chamber 202 that can have working media to circulate and the bore of stator 201 flowed through without working media, and rotor 72 can turn Be set in rotor chamber 202 dynamicly, stator 71 is set to relatively fixedly in bore of stator 201,5 one end of separation sleeve and the pump housing 2 or The injection molding of rear cover 3 is fixed, and the free end of separation sleeve 5 forms opposing seal structure by rear cover 3 or the limit of the pump housing 2 and in interconnecting piece.

As shown in Figures 2 and 3, in the first embodiment of electric drive pump 100, the pump housing 2 and separation sleeve 5 are integrated setting Structure is wholely set and links into an integrated entity or primary or quadric injection mould forms one etc. including being welded and fixed；The present embodiment pump housing 2 Can be using one of in following three kinds of structures, the first structure with being wholely set for separation sleeve 5: separation sleeve 5 selects metal Material is made, and the pump housing 2 uses plastic material, when processing, first process separation sleeve 5, be inserts with separation sleeve 5, by being molded shape At the pump housing 2, separation sleeve 5 and the pump housing 2 are fixedly installed by integrated through injection molding；Second of structure: separation sleeve 5 and the material of the pump housing 2 are Plastic material that is identical or can cooperating, the pump housing 2 and separation sleeve 5 are structure as a whole using disposable injection molded, or are used Structure is integrally formed using secondary injection molding method.Separation sleeve 5 and the pump housing 2 by injection molding fixed setting, the first structure due to The separation sleeve used can reduce injection molding difficulty, second of structure in injection molding, separation sleeve 5 is adopted with the pump housing 2 for metal sheets It is integrally formed structure with material injection that is identical or can cooperating, the leakproofness of injection molded article can be improved；The third knot Separation sleeve 5 and the pump housing 2 can use metal material in structure, and the two is fixedly connected by welding.

Fig. 1, Fig. 2 and Fig. 3 are please referred to, the pump housing 2 is in cover shape, including top 21 and side wall 22, top 21 and side wall 22 surround The inner cavity of the pump housing 2；Stator 71 and rotor 72 can be set in the inner cavity of the pump housing 2；Top 21 is provided with the recess of inside cavity direction Area 211, depressed area 211 are recessed to be formed to the inner cavity of the pump housing 2 from the outer surface at top 21, and depressed area 211 includes concave bottom 2111 and recessed side walls 2112, the central part of the concave bottom 2111 of depressed area 211 is provided with centre bore 211a, pump shaft 8 Impeller cavity 10 is protruded into from rotor chamber 202 across centre bore 211a and is connect with impeller 6；Wherein, impeller 6 and the part of pump shaft 8 are matched Conjunction portion is located at 211 recessed portion of depressed area, in this way do not increase electric drive pump 100 whole height under the premise of, can make impeller 6 with The length of fit of pump shaft 8 increases, and improves the run stability of impeller 6；Recessed side walls 2112 are distributed in ladder, can prevent impeller 6 generate interference with the pump housing 2 at work.

The outside of side wall 22 is provided with the first fixed part 23 and the second fixed part 24, the first fixed part 23 and pump cover 1 is connected by bolt or screw, and the second fixed part 24 by screw or is bolted with rear cover 3；The inner surface of side wall 22 is set One or two or more is equipped with for the limiting device to 71 auxiliary stopper of stator；Limiting device includes from side wall to the pump housing 2 The inside of side wall 22 is arranged in the convex rib 25 that internal protrusion is formed, convex rib 25, the convex rib 25 when convex rib 25 is two It is symmetrical in the interior lateral edge side wall 22 of side wall 22；When convex rib 25 is three or more, convex rib 25 is in the inside of side wall 22 Circumference along side wall 22 is substantially evenly distributed, and the present embodiment protrusions muscle 25 is 3, and adjacent protrusion muscle 25 is substantially in 120 degree points Cloth；After stator 71 is installed on bore of stator 201, the iron core of stator 71 can match in radial direction or circumferencial direction with convex rib 25 in gap Conjunction can also form tight fit, can assist the rotation of limitation stator 71, keep the connection between stator 71 and the pump housing 2 more reliable solid It is fixed.

The inner surface and 5 integrated injection molding of separation sleeve at the top 21 of the pump housing 2, the inner surface at top 21, which is provided with, is used to support pump The first bearing mounting base 811 of the first bearing 81 of axis 8, first bearing mounting base 811 include the inner surface for being set to top 21 First annular raised 261 convexed to form from the top of the pump housing 2 21 to pump housing inner cavity, the outer surface of first bearing 81 and the first ring The medial surface tight fit of shape protrusion 261 is arranged, and the medial surface of first bearing 81 and the outer surface tight fit of pump shaft 8 are arranged.

Simultaneously please refer to shown in Fig. 1 and Fig. 4, Fig. 5, rear cover 3 include upper and lower surfaces and side wall, rear cover 3 it is upper Surface is provided with the second mounting portion 36 for limiting 5 free end of separation sleeve and the second bearing for accommodating second bearing 82 Mounting base 822, second bearing 82 are used to support pump shaft 8；Second mounting portion 36 includes the third annular for being set to 3 upper surface of rear cover The second annular groove 363 formed between protrusion 361 and fourth annular protrusion 362 and adjacent annular protrusion, the second annular Groove 363 includes installation side wall and installation bottom wall, and installation side wall includes the medial surface and fourth annular of third annular protrusion 361 The lateral surface of protrusion 362, installation bottom wall are located between installation side wall；Second annular groove 363 is inserted into the free end of separation sleeve 5 It is interior, be provided with sealing ring between the free end of separation sleeve 5 and installation bottom wall, prevent working media in rotor chamber 202 by every Enter in bore of stator 201 from the interconnecting piece between set 5 and rear cover 3.In addition it can also be arranged in second annular groove 363 and be used for The stage portion of position limiting sealed circle equally can also achieve the goal in this way.

In the upper surface of rear cover 3, fourth annular protrusion 362 is provided with labyrinth type groove 362a, labyrinth type groove 362a with The regional connectivity setting that the medial surface of fourth annular protrusion 362 surrounds, fourth annular protrusion 362 further includes a stage portion 362b, The height of stage portion 362b is lower than the height of fourth annular protrusion 362, the outer surface of second bearing 82 and fourth annular protrusion 362 The setting of medial surface tight fit, an end face of second bearing 82 and the upper surface of stage portion 362b substantially contact setting, second The medial surface of bearing 82 and the lateral surface tight fit of pump shaft 8 are arranged.In the present embodiment, enclosed in raised 362 medial surfaces of fourth annular At housing region in, rear cover 3 be provided with one through rear cover 3 upper and lower surface central small hole 365.In the present embodiment, rear cover 3 The peripheral part of upper surface be additionally provided with edge protuberance ring 364, edge protuberance ring 364 is corresponding with the limiting device 25 on the pump housing to be set It sets, through the upper and lower surface of rear cover, edge protuberance ring 364 is provided with the intercommunicating pore 364a of the upper and lower surface through rear cover.

It is as shown in Figure 6 to 8 the structural schematic diagram of second of embodiment of electric drive pump 100, with the first implementation Mode is compared, and the main distinction is: rear cover 3 ' and separation sleeve 5 ' are structure as a whole, and rear cover 3 ' and separation sleeve 5 ' can use following One of three kinds of structures, the first structure: separation sleeve 5 ' is made of metal material, rear cover 3 ' use plastic material, first plus The good separation sleeve of work, then with separation sleeve 5 ' for inserts, rear cover 3 ' is formed by injection molding, separation sleeve 5 ' and rear cover 3 ' pass through integrated through injection molding Fixed setting；Second of structure: separation sleeve 5 ' and the material of rear cover 3 ' are identical plastic material or the plastic material that matches, Rear cover 3 ' and separation sleeve 5 ' are made using disposable injection molded or in the form of quadric injection mould.Separation sleeve 5 ' and rear cover 3 ' are logical Injection molding fixed setting is crossed, the first structure can reduce injection molding in injection molding since the separation sleeve 5 ' used is metal sheets Difficulty, second of structure, separation sleeve 5 ' and rear cover 3 ' use the disposable injection molded of identical material, and injection molded can be improved The leakproofness of part；The third structure: separation sleeve 5 ' and rear cover 3 ' are all made of metal material and by being welded and fixed.

Please refer to Fig. 6, Fig. 7 and Fig. 8 simultaneously, the pump housing 2 ' is in cover shape, including top 21 and side wall 22, top 21 and side wall 22 Surround the inner cavity of the pump housing 2 '；Stator 71 and rotor 72 are set to the inner cavity of the pump housing 2；The outside of side wall 22 is provided with the first fixed part Points 23 and second fixed part 24, the first fixed part 23 connect with pump cover 1 by bolt or screw, the second fixed part 24 and Rear cover 3 is by screw or is bolted；Top 21 is provided with the depressed area 211 of inside cavity direction, and depressed area 211 is from top 21 Outer surface is recessed to be formed to the inner cavity of the pump housing 2 ', and depressed area 211 includes concave bottom 2111 and recessed side walls 2112, through recessed The central part for the concave bottom 2111 for falling into area 211 is provided with centre bore 211a, and pump shaft 8 passes through centre bore 211a from rotor chamber 202 It is connect into impeller cavity 10 and with impeller 6；Wherein, the part matching part of impeller 6 and pump shaft 8 is in the recessed portion of depressed area 211, In this way under the premise of not increasing electric drive 100 whole height of pump, the length of fit of impeller 6 and pump shaft 8 can be made to increase, improved The run stability of impeller 6；Or under similar circumstances, the overall height of electric drive pump is reduced；Recessed side walls 2112 are in Ladder distribution, can prevent impeller 6 and the pump housing 2 ' from generating interference at work.

As shown in Figure 6 and Figure 7, the inner surface of the side wall of the pump housing 2 ' is provided with two or more for 71 auxiliary stopper of stator Limiting device, limiting device includes the convex rib 25 that internal protrusion from from side wall to the pump housing 2 ' is formed, and convex rib 25 is in side wall The circumference of 22 interior lateral edge side wall 22 is substantially evenly distributed, and the present embodiment protrusions muscle 25 is 3, and adjacent protrusion muscle 25 is substantially in 120 degree of distributions；After stator 71 is installed on bore of stator 201, the iron core of stator 71 is in radial direction or circumferencial direction and the formation of convex rib 25 Tight fit or clearance fit can assist the rotation of limitation stator 71, stator 71 made to connect more reliable fixation with the pump housing 2 '；This reality It applies in example, the inner surface at the top 21 of the pump housing 2 ' is provided with the first mounting portion 26 for limiting separation sleeve 5 ' and for accommodating The first bearing mounting base 811 of first bearing 81, first bearing 81 is for limiting or supporting pump shaft 8；First mounting portion 26 includes Be set to top 21 inner surface first annular raised 261 and second annular protrusion 262 and adjacent annular protrusion between The first annular groove 263 of formation, first annular groove 263 include installation side wall and installation bottom wall, and installation side wall includes first The lateral surface of the medial surface of annular protrusion 261 and the second annular protrusion 262, installation bottom wall are located between installation side wall；Isolation In the free end insertion first annular groove 263 of set 5 ', the free end of separation sleeve 5 ' and the interconnecting piece of first annular groove 263 are set It is equipped with sealing ring, prevents the working media in rotor chamber 202 from entering stator by the interconnecting piece between separation sleeve 5 ' and the pump housing 2 ' In chamber 201；In addition stage portion for position limiting sealed circle can also be set in first annular groove 263, equally also can in this way It achieves the goal；The medial surface of first bearing mounting base 811 including the second annular protrusion 262, the outer surface of first bearing 81 and the The medial surface tight fit of second ring protrusion 262 is arranged, and the inner surface of first bearing 81 is set with the outer surface secure fit of pump shaft 8 It sets.

As shown in Figure 6 and Figure 8, rear cover 3 ' includes upper and lower surfaces and side wall, the upper surface of rear cover 3 ' be isolated Set 5 ' is fixed through injection molding, including integrated injection molding and by being fixed with the injection molding that separation sleeve 5 ' is inserts；Rear cover 3 ', which is provided with, to be used for The second bearing mounting base 822 of second bearing 82 is accommodated, second bearing 82 is for limiting or supporting pump shaft 8；It is arranged on rear cover 3 ' Have a third annular protrusion 361, second bearing mounting base 822 includes the medial surface of third annular protrusion 361, second bearing 82 it is outer The medial surface tight fit of surface and third annular protrusion 361 is arranged, the inner surface of second bearing 82 and the outer surface close-fitting of pump shaft 8 Close setting；Rear cover 3 is provided with a central small hole 365 through the upper and lower surface of rear cover 3.

As shown in figures 1 to 6, in order to further cool down electronic control unit 9, electric drive pump 100 is provided with to follow for working media The cooling duct 90 of ring generates the heat working media flowed in channel 90 that can be cooled and takes away when electronic control unit 9 works；It is cold But channel 90 includes the first segment channel 91 being connected to the higher-pressure region of impeller cavity 10, second be connected to impeller cavity 10 compared with low-pressure area Duan Tongdao 92, and the third section channel 93 that can be exchanged heat with electronic control unit 9；It is pumped in 100 courses of work in electric drive, due to cold But the pressure of channel entrance is greater than the pressure of cooling duct outlet, since the pressure difference of cooling duct 90 inlet end and an outlet end is deposited Working media is flowed in cooling duct 90；Wherein the single arrow direction in diagram illustrates electric drive pump 100 The possible type of flow of working media when work, in cooling duct 90.

First segment channel 91 includes the pump housing channel 251 that the top and bottom of the side wall through the pump housing 2 are formed, pump housing channel 251 at least more than one；Specifically, pump housing channel 251 is disposed through some or all of reinforcing rib 25, pump housing channel 251 The substantially smooth linear type of the circulation path of the working media of formation is convenient for work to reduce the flow resistance of working media The flowing of medium；Wherein at least one pump housing channel 251 is set to or is partially disposed in proximity to the setting of the outlet of impeller cavity 10 A reinforcing rib 25 on, such channel 251 can be connected to the obvious higher-pressure region of impeller cavity 10；The present embodiment middle pump body channel 251 include three, respectively corresponds three reinforcing ribs 25 and is arranged；The number of certain reinforcing rib 25 can be greater than 251, pump housing channel Number, such as reinforcing rib 25 can be 6, and the number in pump housing channel 251 is 3.

As shown in Figure 1, second segment channel 92 includes the axial passage 801 being set on pump shaft 8, axial passage 801 is along pump The length direction of axis 8 is simultaneously formed through 8 liang of ends of pump shaft, and axial passage 801 is connected to the low-pressure area of impeller cavity 10；Axial passage The substantially smooth linear type of the circulation path of 801 working medias formed is convenient for work to reduce the flow resistance of working media Make the flowing of medium；Cooling duct 90 can also include second segment subaisle 921, and second segment subaisle 921 includes being set to pump The recirculation hole 211c of the depressed area 211 of body 2, recirculation hole 211c are connected to impeller cavity 10 and rotor chamber 202, and recirculation hole 211c is opposite to be leaned on Nearly pump shaft 8 is arranged, and has certain distance, such recirculation hole 211c and impeller between recirculation hole 211c and the central axis of the pump shaft Chamber 10 is connected to the pressure at position can be slightly larger than the pressure for the exit site that pump shaft is connected to impeller cavity 10；Second segment subaisle 921 circulation path be it is relatively tortuous, increase the flow resistance of working media, can make working media preferably with stator 71 Carry out heat exchange.Double-head arrow direction as shown in Figure 1 illustrates a kind of flowing side of working media in the second subaisle 921 To, i.e., impeller cavity 10 is flowed to by the second subaisle 921 from third section channel 93, at this moment, the flow area in first segment channel 91 Product is larger, and working media resistance for being subject to when through the flowing of first segment channel 91 is smaller, so that into third section channel 93 The pressure of working media be greater than recirculation hole 211c and with impeller cavity 10 be connected to the pressure at position so that working media is secondary second It can be flowed according to direction shown in double-head arrow in channel 921；If working media is hindered in first segment channel 91 by biggish flowing Power, so that pressure decline of the working media in first segment channel 91 is larger, and then the working media in third section channel 93 When pressure is connected to the pressure at position with impeller cavity 10 lower than recirculation hole 211c, working media in the second subaisle 921 is from leaf It takes turns chamber 10 to flow to third section channel 93, the working media in third section channel 93 flows into impeller cavity by second segment channel 92 10。

As shown in figures 1 to 6, opposing seal forms third section channel 93, third section channel 93 between rear cover 3 and partition 50 Setting is connected to by connectivity structure with first segment channel 91 and second segment channel 92；The lower surface of rear cover 3 and partition 50 Upper surface contacts setting with working media, and the lower surface of partition 50 contacts setting with electronic control unit 9, and partition 50 is metal material, The heat generated when electronic control unit 9 is worked is transmitted to the working media flowed in third section channel 93 by partition 50 and passes through The working media of flowing is taken away；To guarantee that third section channel 93 forms the space of opposing seal, it is arranged between circuit board and stator Place of the lead by the side wall of rear cover 3 or other than other third section channels 93 be connected to the coil of stator 71.

Upper and lower equal directions in above embodiments are intended merely to description conveniently, and upper and lower direction is not necessarily electric drive pump Direction after 100 installations does not generate limitation to the use direction of electric drive pump.

It should be understood that above embodiments are merely to illustrate the present invention and not limit technical side described in the invention Case, although this specification is referring to the above embodiments, the present invention has been described in detail, the common skill of this field Art personnel should be appreciated that person of ordinary skill in the field still can modify or equivalently replace the present invention, and All do not depart from the technical solution and its improvement of the spirit and scope of the present invention, should all cover in scope of the presently claimed invention It is interior.

Claims

1. a kind of electric drive pump, including pump cover, the pump housing, impeller, rear cover, pump shaft, motor part and electronic control unit, the pump cover With the fixed impeller cavity formed for accommodating the impeller of the pump housing；The pump housing and rear cover fixation are formed described in receiving First accommodating chamber of motor part；The motor part includes stator and rotor, and the rotor drives the impeller by pump shaft Rotation；It is characterized by: the electric drive pump further includes a separation sleeve, it is fixed that first accommodating chamber is divided by the separation sleeve Sub- chamber and rotor chamber, close to the pump shaft, the bore of stator does not connect the relatively described bore of stator of the rotor chamber with the impeller cavity Logical, the rotor chamber is directly or indirectly connected to the impeller cavity, and the stator is set in the bore of stator, the rotor It is set in the rotor chamber；The electronic control unit and the motor part cooperating, the electronic control unit control the electricity The operation of machine part；One end of the separation sleeve is wholely set with the pump housing or the rear cover, the freedom of the separation sleeve End limits by the pump housing or rear cover that are not wholely set with the separation sleeve and is formed opposing seal chamber, prevents in the rotor chamber Working media intervene the bore of stator.

2. electric drive pump according to claim 1, it is characterised in that: the separation sleeve is metal material, with the isolation Part forms the part joined integrally of the pump housing and separation sleeve by injection molding based on set, and the pump housing includes top and side wall, institute It states separation sleeve and the top is fixedly installed, the medial surface at the top is formed with the first bearing of pump shaft described in limited support First bearing mounting base；First bearing mounting base includes first annular protrusion, the medial surface of the first annular protrusion with it is described The outer peripheral surface tight fit of first bearing is arranged.

3. electric drive pump according to claim 2, it is characterised in that: the rear cover is fixed in the free end of the separation sleeve The mounting portion of setting, the rear cover include upper and lower surfaces, and the upper surface of the rear cover is provided with to described first and accommodates The second annular protrusion and third annular protrusion of chamber internal protrusion, the mounting portion include adjacent annular protrusion between formed it is recessed Slot, free end insertion the second annular protrusion outer peripheral surface of the separation sleeve and the third annular protrusion inner peripheral surface form recessed In slot, and opposing seal is formed by squeezing ring type seal.

4. electric drive pump according to claim 3, it is characterised in that: the electric drive pump includes for limiting or supporting institute The first bearing and second bearing of pump shaft are stated, the upper surface of the rear cover is provided with the second axis for accommodating the second bearing Mounting base is held, the second bearing mounting base includes the second annular protrusion inner peripheral surface, the second annular protrusion inner peripheral surface It is arranged with the outer surface tight fit of the second bearing.

5. electric drive pump according to claim 1, it is characterised in that: the electric drive pump includes for limiting or supporting institute State the first bearing and second bearing of pump shaft；The separation sleeve is metal material, and part is by injection molding based on the separation sleeve The part joined integrally of the rear cover Yu the separation sleeve is formed, the separation sleeve is set to the upper surface of the rear cover, after described Lid is formed with first bearing mounting base, and the first bearing mounting base is for accommodating the first bearing；The first bearing peace Dress seat includes the first annular protrusion for forming in the upper surface of the rear cover, the outer surface of the first bearing and first ring The inner peripheral surface tight fit of shape protrusion is arranged.

6. electric drive pump according to claim 5, it is characterised in that: the pump housing is fixed in the free end of the separation sleeve The mounting portion of setting, the pump housing include top and side wall, and the mounting portion is set to the top, the top be provided with to The second annular protrusion and third annular protrusion protruded inside first accommodating chamber, the mounting portion include adjacent annular protrusion Between the groove that is formed, the second annular protrusion outer peripheral surface and the third annular protrusion are inserted into the free end of the separation sleeve Inner peripheral surface is formed in groove, and forms sealing by squeezing ring type seal.

7. electric drive pump according to claim 6, it is characterised in that: the inner surface at the top is provided with for accommodating The second bearing mounting base of second bearing, the second bearing mounting base include the second annular protrusion inner peripheral surface, and described The outer surface tight fit of second ring protrusion inner peripheral surface and the second bearing is arranged.

8. electric drive pump according to claim 1, it is characterised in that: the separation sleeve is plastic material, and the rear cover is Plastic material, the separation sleeve and the rear cover are once molded or quadric injection mould forms integral structure, the separation sleeve from It is inserted by end in the groove of the pump housing setting, is fixed by the fixed part that the pump housing is arranged.

9. electric drive pump according to claim 8, it is characterised in that: the pump housing, which is arranged to first accommodating chamber, to be protruded It is first annular protrusion and the second annular protrusion, the fixed part include it is described it is first annular protrusion and second annular protrusion Between groove, the free end of the separation sleeve is inserted into the groove, the freedom of the bottom of the groove and the separation sleeve It is provided between end and in interconnecting piece setting ring type seal between the free end and the bottom portion of groove of the separation sleeve Interconnecting piece forms sealing.

10. electric drive pump according to claim 8, it is characterised in that: first bearing mounting base is arranged in the rear cover, described The pump housing is provided with second bearing mounting base, and the first bearing is installed on the first bearing mounting base, the second bearing peace Loaded on the second bearing mounting base, the first bearing outer peripheral surface and the first bearing mounting base tight fit, described second Bearing outer peripheral surface and the second bearing mounting base tight fit, the pump shaft and the first bearing medial surface and described second The medial surface of bearing is respectively formed tight fit.