CN205331002U - Electronic pump - Google Patents

Abstract

The utility model provides an electronic pump, include: the motor casing, its outside is connected with the drive plate subassembly, stator winding, cover establish at the motor casing inboardly, and are connected with drive plate subassembly electricity to can produce rotating field under the control of drive plate subassembly, the separation sleeve, the cover is established at stator winding inboardly, and it insidely has the annular chamber, and the front end of separation sleeve is the open end, and the rear end is the central axial installation dabber of blind end, separation sleeve, the impeller rotor assembly, locate the annular chamber in, and can overlap with rotating and establish outside the dabber to including impeller and connection impeller and the rotor relative with stator winding, the rotor drives rotating impeller under rotating field's effect, pump cover, sealing connection be at the open end of separation sleeve, and form the pump chamber of holding impeller with the separation sleeve butt joint, sets up respectively water inlet and delivery port with the pump chamber intercommunication on the pump cover. The utility model discloses an electronic pump, axial dimensions is little, simple structure, compactness, heat dispersion is good.

Description

Electronic water pump

Technical field

This utility model relates to water pump field, the electronic water pump of especially a kind of compact conformation。

Background technology

Electronic water pump is widely used in car radiation blood circulation, and what provide heat eliminating medium in heat dissipation circulating system circulates power。After automobile starting, a large amount of thermal component such as electromotor, Electronic Control components and parts all can produce substantial amounts of heat, and these heats produced must flow through heat dissipation circulating system and discharge in time, enabling a large amount of thermal component normal operation in certain temperature range such as electromotor, Electronic Control components and parts, electronic water pump is exactly the power source that cooling system heat-conducting medium circulates。

The water pump of the first prior art adopts brush motor as power drive, brush motor and impeller are split-type structural, the motor shaft of brush motor stretches in pump chamber through pump seat, and adopt with the impeller in pump chamber and to be mechanically fixed and be connected, mechanical type rotating is adopted to seal between motor shaft and pump seat, prevent cooling medium in pump chamber from seepage between motor shaft and pump seat, rotate in airtight pump chamber thus realizing motor shaft impeller, cooling medium is driven to enter from water inlet, discharge from outlet, it is achieved the flowing of cooling medium。Its existence has the drawback that, axial dimension is big, and the axial space occupied is big, and structure is complicated；

The water pump of the second prior art adopts brushless electric machine as power drive, brush motor and impeller are also split-type structural, but motor shaft does not stretch into pump chamber, the motor shaft of brushless electric machine installs the outer magnetic ring with Magnet, impeller in pump chamber is also provided with Magnet, isolated by pump seat between impeller and outer magnetic ring, that is impeller is in the pump chamber that pump seat and pump cover form, outer magnetic ring is outside pump chamber, Magnet on outer magnetic ring is corresponding with the Magnet on impeller, when motor shaft drives outer magnetic ring to rotate, Magnet on outer magnetic ring assembly drives the interior impeller with Magnet of pump chamber to rotate accordingly by magnetic, rotate in airtight pump chamber thus realizing impeller, cooling medium is driven to enter from water inlet, discharge from outlet, realize the flowing of cooling medium, namely motor and impeller adopt magnetic couple。Its existence has the drawback that, axial dimension is big, and the axial space occupied is big, and structure is complicated。

Utility model content

The purpose of this utility model is to provide a kind of electronic water pump, and its rotor assembles as a whole with impeller, and rotor is directly driven by motor stator winding, and impeller rotates, and axial dimension is little, compact conformation。

For reaching above-mentioned purpose, the utility model proposes a kind of electronic water pump, including: motor casing, it is in a cylindrical shape, outside it, is connected to drive plate assemblies；Stator winding, is set in inside motor casing, and electrically connects with drive plate assemblies, and can produce rotating excitation field under the control of drive plate assemblies；Separation sleeve, is set in inside stator winding, and has annular chamber inside it, and the front end of separation sleeve is opening, and rear end is blind end, the central axial installation mandrel of separation sleeve；Vane rotor assembly, is located in annular chamber, and can be set in outside mandrel rotationally, and vane rotor assembly includes impeller and connects impeller and the rotor relative with stator winding, and rotor impeller under the effect of rotating excitation field rotates；Pump cover, is sealedly connected on the opening of separation sleeve, and docks the pump chamber forming accommodating impeller with separation sleeve, pump cover offers the water inlet and outlet that connect with pump chamber respectively。

Electronic water pump as above, wherein, separation sleeve includes the overcoat of tubular and is connected to the support portion of central axial column of overcoat, annular chamber is formed between overcoat and support portion, the central axial of support portion wears mandrel, the sheathed rotor in outside of support portion, overcoat is by stator winding and the isolation of vane rotor assembly。

Electronic water pump as above, wherein, vane rotor assembly also includes: adapter sleeve, is connected with impeller, and one-body molded with impeller；Positioning sleeve, is socketed in inside adapter sleeve, and is set in outside support portion, and rotor is coated between the lateral wall of positioning sleeve and the medial wall of adapter sleeve。

Electronic water pump as above, wherein, the fixing bearing inner race being made of ceramic materials outside support portion, inside positioning sleeve, the fixing bearing outer ring being made of ceramic materials and coordinating with bearing inner race, bearing outer ring and bearing inner race constitute ceramic bearing。

Electronic water pump as above, wherein, ceramic bearing is two, and is respectively positioned at the first ceramic bearing of front end, support portion and is positioned at the second ceramic bearing of rear end, support portion。

Electronic water pump as above, wherein, mandrel has the external part stretching out support portion, impeller and pump cover and is sequentially sleeved at outside external part, and impeller, against impeller, is axially positioned by pump cover。

Electronic water pump as above, wherein, the cavity between separation sleeve and vane rotor assembly is heat dissipation cavity, and heat dissipation cavity and pump chamber constitute fluid flow passageway。

Electronic water pump as above, wherein, pump cover is scroll casing shape, and pump chamber is spiral case inner chamber, near the pressure in the region of outlet in spiral case inner chamber, more than the pressure in the region near water inlet。

Electronic water pump as above, wherein, has filling chamber between stator winding and separation sleeve, fill intracavity and be provided with heat conductive insulating sealant layer。

Electronic water pump as above, wherein, is sealedly connected with ring flange between leading section and the pump cover of motor casing, ring flange and separation sleeve are tightly connected。

Feature and the advantage of electronic water pump of the present utility model be:

1, electronic water pump of the present utility model, impeller and rotor compound are constituted vane rotor assembly, vane rotor assembly is directly rotated by magnetically-actuated by the stator winding in motor, separation sleeve can not only isolate vane rotor assembly and stator winding, also directly dock with pump cover and form complete water pump internal fluid channels, have pump seat function concurrently, it is thus possible to effectively reduce the axial dimension of electronic water pump, make water pump structure simpler, compact；

2, electronic water pump of the present utility model, arranges ceramic bearing inside vane rotor assembly, and ceramic bearing is the structure that ceramic bearing inner ring coordinates with ceramic bearing outer ring, high temperature resistant, anticorrosion, it is achieved non-maintaining, long service life；

3, electronic water pump of the present utility model, fluid heat dissipation cavity internal circulation flow between separation sleeve and vane rotor assembly, take away the heat of motor self and the heat of drive plate assemblies generation；Heat conductive insulating sealant layer is filled in filling chamber inside stator winding, makes complete machine temperature more uniform, and heat-conducting effect is better；The heat conductive insulating fluid sealant of the internal embedding of heat radiation bonnet, it is ensured that the good heat radiating of drive plate assemblies；It is delivered to the heat of motor casing, is dispelled the heat by radiating fin；So that electronic water pump of the present utility model has excellent heat dispersion。

Accompanying drawing explanation

The following drawings is only intended to, in this utility model being schematically illustrated and explaining, not limit scope of the present utility model。Wherein:

Fig. 1 is the schematic diagram of electronic water pump of the present utility model；

Fig. 2 is the left view of electronic water pump in Fig. 1；

Fig. 3 is the right view of electronic water pump in Fig. 1；

Fig. 4 is the schematic diagram of separation sleeve in this utility model；

Fig. 5 is the left view of separation sleeve in Fig. 4；

Fig. 6 is the right view of separation sleeve in Fig. 4；

Fig. 7 is the schematic diagram of vane rotor assembly in this utility model；

Fig. 8 be in Fig. 7 vane rotor assembly along the sectional view of line A-A；

Fig. 9 is the right view of vane rotor assembly in Fig. 7；

Figure 10 is the combination schematic diagram of separation sleeve and vane rotor assembly in this utility model；

Figure 11 is the schematic diagram of this utility model middle (center) bearing inner ring；

Figure 12 is Figure 11 middle (center) bearing inner ring sectional view along line B-B；

Figure 13 is the schematic diagram of this utility model middle (center) bearing outer ring；

Figure 14 is Figure 13 middle (center) bearing outer ring sectional view along line C-C。

Main element label declaration:

1 motor casing 11 housing 12 dispels the heat bonnet

2 stator winding 20 heat conductive insulating sealant layers

3 separation sleeve 31 annular chamber 311 heat dissipation cavity

32 overcoat 33 support portion 34 positioning sleeves

35 first thrust pads

4 vane rotor assembly 41 impeller 411 ostiums

42 rotor 421 rotor core 422 magnetic sheets

43 adapter sleeve 44 positioning sleeve 45 bearing fixing sleeves

46 second thrust pad 47 plain cushions

5 pump cover 51 pump chamber 52 water inlets

53 outlets

6 drive plate assemblies 7 mandrels

8 ceramic bearing 81 bearing inner race 82 bearing outer rings

9 ring flange 10 rear end cap 500 heat conductive insulating fluid sealants。

Detailed description of the invention

In order to technical characteristic of the present utility model, purpose and effect are more clearly understood from, now comparison accompanying drawing illustrates detailed description of the invention of the present utility model。

As shown in Figure 1, Figure 2, Figure 3 shows, this utility model provides a kind of water pump, for instance be called electronic water pump, including motor casing 1, stator winding 2, separation sleeve 3, vane rotor assembly 4 and pump cover 5。Motor casing 1 is in a cylindrical shape, and connects drive plate assemblies 6 outside it；Stator winding 2 is set in the inner side of motor casing, and electrically connects with drive plate assemblies 6, for producing generation rotating excitation field under the control of drive plate assemblies；Separation sleeve 3 is set in inside stator winding 2, also namely is located in motor casing 1, and separation sleeve 3 inside has annular chamber 31, is used for installing rotor, and the front end of separation sleeve 3 is opening, and rear end is blind end, the central axial installation mandrel 7 of separation sleeve 3；Vane rotor assembly 4 is located in annular chamber 11, namely it is positioned at separation sleeve 3, and can be set in rotationally outside mandrel 7, impeller 41 that vane rotor assembly 4 includes being positioned at the opening of separation sleeve 3 and connect impeller 41 and the rotor 42 relative with stator winding 2, rotor 42 rotates for impeller 41 under the effect of rotating excitation field；Pump cover 5 is sealedly connected on the opening of separation sleeve 3, and and the opening of separation sleeve 3 between by dock formed house impeller 41 pump chamber 51, pump cover 5 offers the water inlet 52 and outlet 53 that connect with pump chamber 51 respectively, pump cover 5 and separation sleeve 3 are tightly connected, to prevent fluid seepage in pump chamber to outside motor。

Electronic water pump of the present utility model, impeller and rotor compound is adopted to constitute vane rotor assembly, vane rotor assembly is directly driven rotation by the stator winding of motor, separation sleeve can not only isolate vane rotor assembly and stator winding, also directly dock with pump cover and form complete water pump internal fluid channels, have pump seat function concurrently, it is thus possible to effectively reduce the axial dimension of electronic water pump, make water pump structure simpler, compact, reduce water pump cost of manufacture；

Simultaneously, after assembling one due to impeller and rotor, drive plate assemblies 6 directly controls or drives stator winding 2 to produce rotating excitation field, rotor 42 impeller 41 under the directly effect of rotating excitation field rotates, outer magnetic ring assembly is driven to rotate with prior art by motor shaft, the wheel rotation with Magnet is driven in water pump to compare again through the Magnet on outer magnetic ring assembly by magnetic, decrease motor shaft, driving wheel and for the outer magnetic ring assembly of magnetic couple and the Magnet that is installed on impeller, owing to eliminating on traditional structure high-protection level motor the crucial high cost parts required for impeller and motor magnetic driver, not only reduce product axial dimension, shorten volume, it is easy to assemble and lay, and properties of product do not reduce, and material cost is greatly lowered, improve electric efficiency。

Wherein, motor casing includes the housing 11 of annular and is connected to the heat radiation bonnet 12 of rearward end of housing 11, and stator winding 2 is set in inside housing 11, and with housing 11 interference fit, the outer face of heat radiation bonnet 12 connects drive plate assemblies 6。

It addition, be also sealedly connected with ring flange 9 between the leading section of separation sleeve 3 and pump cover 5, separation sleeve 3 is pressed on ring flange 9 by pump cover 5, and separation sleeve 3 and ring flange 9 are tightly connected, and fits with ring flange 9 end face, to prevent the liquid of outside motor from entering stator winding。Its middle shell and heat radiation bonnet, between housing and ring flange, ring flange and separation sleeve by silicone rubber O-ring seal, owing to adopting radially static seal mode, design according to IP68 degree of protection, degree of protection is high, will not there is heat-conducting medium seepage in life-time service, can effectively prevent liquid by entering inside outside motor。

As Figure 1 and Figure 4, in a specific embodiment, separation sleeve 3 includes the overcoat 32 of tubular and is connected to the support portion 33 of central axial column of overcoat 32, overcoat 32 such as takes the shape of the letter U, forming annular chamber 31 between overcoat 32 and support portion 33, the central axial of support portion 33 wears fixed central spindle 7, and mandrel 7 is axially through support portion 33 in other words, the sheathed rotor 42 in outside of support portion 33, stator winding 2 and vane rotor assembly 4 are isolated by overcoat 32。

In the present embodiment, vane rotor assembly 4 also includes the adapter sleeve 43 of annular and the positioning sleeve 44 of annular, and adapter sleeve 43 is connected with impeller 41, and one-body molded with impeller 41；Positioning sleeve 44 is socketed in inside adapter sleeve 43, and it is set in outside support portion 33, rotor 42 is coated and fixed between the medial wall of the lateral wall of positioning sleeve 44 and adapter sleeve 43, it is preferred that, the length of adapter sleeve 43 is more than the length of rotor, and the length of separation sleeve 3 is more than the length of adapter sleeve 43。Said structure by adapter sleeve, separation sleeve, can directly by impeller and rotor compound, reduce motor shaft, driving wheel and the magnetic ring component for magnetic couple that existing water pump adopts, quality of fit is made to be ensured, the connection of vane rotor assembly and adapter sleeve, separation sleeve reduces intermediate connector, final assembly operation is few, the minimizing of number of parts, also reduces the cost of motor。

Wherein, rotor 42 includes rotor core 421 and is uniformly attached to the magnetic sheet 422 on rotor core 421 periphery wall, adopts epoxy glue bonding firmly between rotor core 421 with magnetic sheet 422。

Such as Fig. 4, Fig. 7, shown in Figure 10, additionally, the fixing bearing inner race 81 being made of ceramic materials outside support portion 33, the structure of bearing inner race 81 refers to Figure 11, Figure 12, the fixing bearing outer ring 82 being made of ceramic materials and coordinating with bearing inner race 81 inside positioning sleeve 44, the structure of bearing outer ring refers to Figure 13, Figure 14, bearing outer ring 82 and bearing inner race 81 constitute ceramic bearing 8, ceramic bearing 8 is arranged in the inner chamber of vane rotor assembly 4, rotate for supporting rotor, bear radial force, ceramic bearing 8 by the pumped medium entered from ostium 411 or working media as lubricant。

As shown in FIG. 10 to 14, ceramic bearing 8 is the sliding bearing that only bearing inner race 81 coordinates with bearing outer ring 82, ceramic bearing 8 is made owing to all adopting ceramic material, the advantage with high temperature resistant, corrosion and abrasion, ceramic bearing 8 is since it is designed that the structure that matches of Internal and external cycle, thoroughly solve the drawback that prior art adopts rolling bearing not soak in media as well, overcoming the existing bearing that can soak in media as well can not meet again the drawback of long life requirement (only 10,000 hours), the service life of the ceramic bearing in this utility model was much larger than 40,000 hours。

The Performance comparision of electronic water pump of the present utility model and tradition water pump is in Table 1:

The Performance comparision of table 1 electronic water pump of the present utility model and tradition water pump

。

Simultaneously, the slip ceramic bearing that this utility model adopts, can be immersed in cooling medium and not be corroded, again can be wear-resistant in high-temperature medium, it is possible to make motor work in the very big range of speeds, and it is unlikely to damage the life-span of bearing, when motor high speed rotating, pump capacity and the lift that can make driven by motor improve a lot, and have the superior function that flow is big, lift is big, thus reaching the different performance requirement of client。

Preferably, ceramic bearing 8 is two, and is respectively positioned at the first ceramic bearing of front end, support portion 33 (one end near impeller) and is positioned at second ceramic bearing of rear end, support portion 33 (one end away from impeller)。

As shown in Fig. 7, Fig. 8, Fig. 9, specifically, between medial wall and the lateral wall of positioning sleeve 44 of adapter sleeve 43, there is mounting groove, rotor 42 is wrapped by and is fixed in mounting groove, the two ends of the bearing outer ring of the first ceramic bearing are resisted against between one end end face of positioning sleeve 44 and the end face of impeller 41, and first ceramic bearing bearing outer ring and adapter sleeve 43 between be arranged with bearing fixing sleeve 45, bearing outer ring adopt epoxy glue be adhesively fixed on the medial wall of bearing fixing sleeve 45；The bearing outer ring of the second ceramic bearing is fixed on the other end of positioning sleeve 44, and adopts epoxy glue to be adhesively fixed on the medial wall of positioning sleeve 44；

When making vane rotor assembly 4, positioning sleeve 44, bearing fixing sleeve 45, rotor core 421, magnetic sheet 422 and bearing outer ring 82 are assembled into an entirety, then it is placed in injection mold and injects integrated impeller 41 and adapter sleeve 43, owing to electronic water pump of the present utility model decreases the motor shaft of existing water pump, driving wheel and the parts such as magnetic ring component for magnetic couple, improve quality of fit, final assembly operation is few, it is simple to makes and installs, reduces cost of manufacture。

As shown in Fig. 4, Fig. 5, Fig. 6, accordingly, support portion 33 is outer is also arranged with positioning sleeve 34, the bearing inner race of the first ceramic bearing is resisted against between the boss on one end end face of positioning sleeve 34 and the lateral wall of front end, support portion 33, and the bearing inner race of the second ceramic bearing is resisted against between the boss on the other end end face of positioning sleeve 34 and the lateral wall of rear end, support portion 33；

When making separation sleeve 3, mandrel 7, bearing inner race 81 and positioning sleeve 34 are placed in injection mold as embedded parts, mutual alignment injects integrated overcoat 32 and support portion 33 again after determining, the separation sleeve of injection mo(u)lding has the function of isolation working media (i.e. fluid) and electric elements, and the working media that the heat that motor itself produces also can be isolated in set inner chamber is taken away。

Again as shown in Figure 1, preferably, it is provided with the first thrust pad 35 between end and the blind end of separation sleeve 3 of the bearing outer ring of the second ceramic bearing, it is alternatively referred to as big thrust pad, first thrust pad 35 is made up of PEEK-HPV material, end face and first thrust pad 35 of the bearing outer ring of the second ceramic bearing coordinate, and bear the axial force between vane rotor assembly and separation sleeve and rotating friction force。PEEK-HPV material is the special engineered material of a kind of function admirable, high temperature resistant more than 260 DEG C, and mechanical performance is excellent, self lubricity is good, and chemicals-resistant corrodes, and wearability is good, for electronic water pump of the present utility model, it is possible to make water pump in use reach non-maintaining rank。

In a feasible technical scheme, mandrel 7 has the external part stretching out support portion 33, impeller 41 is set in outside external part, pump cover 5 is also set in outside external part, namely impeller 41 and pump cover 5 side by side or are sequentially sleeved at outside external part, and pump cover 5 is resisted against the outer end of impeller 41, impeller 41 is axially positioned。

Preferably, the leading section of impeller 41 embeds the second thrust pad 46, it is alternatively referred to as little thrust pad, can not rotate against between second thrust pad 46 and impeller 41, it is provided with plain cushion 47 between pump cover 5 and the second thrust pad 46, pump cover 5 and plain cushion 47 end contact, the axial mobility of restriction impeller 41, the second thrust pad 46 and plain cushion 47 be used for bearing vane rotor assembly point to pump cover water inlet direction axial force and and pump cover between rotating friction force。Second thrust pad 46 is made of ceramic materials, and plain cushion 47 is made up of PEEK-HPV material, and water pump of the present utility model can be made equally in use to reach non-maintaining rank。

As shown in Figure 3, in a preferred embodiment, pump cover 5 is in scroll casing shape, and pump chamber 51 is spiral case inner chamber, near the pressure in the region (can be described as higher-pressure region) of outlet 53 in spiral case inner chamber, more than the pressure in the region (can be described as low-pressure area) near water inlet 52。

Wherein, in annular chamber 31, the part between separation sleeve 3 and vane rotor assembly 4 forms heat dissipation cavity 311, cavity between separation sleeve 3 and vane rotor assembly 4 is heat dissipation cavity 311 in other words, heat dissipation cavity 311 and pump chamber 51 constitute fluid flow passageway, during pump working, fluid is entered in pump chamber 51 by water inlet 52, the rotation of impeller 41, fluid is made to produce centrifugal motion, under the influence of centrifugal force, fluid moves along the runner formed between pump cover 5 and separation sleeve 3 in pump chamber 51, and pressure is stepped up, and is finally flowed out by outlet 53；Owing to there is higher-pressure region and low-pressure area in pump chamber, some fluid at heat dissipation cavity internal circulation flow, will take away motor self and the heat of drive plate assemblies generation, and this segment fluid flow is finally also flowed out by outlet 53。

It addition, have filling chamber between stator winding 2 and separation sleeve 3, fill intracavity and be provided with heat conductive insulating sealant layer 20, be used for fully deriving the heat of motor internal。

Again as shown in Figure 1, additionally, have the containing cavity of accommodating drive plate assemblies 6 in heat radiation bonnet 12, the opening of heat radiation bonnet 12 is provided with the rear end cap 10 closing containing cavity, heat radiation bonnet and rear end cap are also adopted by radially static seal mode and seal, and design according to IP68 degree of protection。For ensureing the good heat radiating of drive plate assemblies, also embedding heat conductive insulating fluid sealant 500 in containing cavity。

Therefore, electronic water pump of the present utility model has the dual-use function of interior media fluid for radiating heat and the heat radiation of back end cover for motor fin, low ambient temperature and high medium temperature can be used for, high ambient temperature and low medium temperature occasion can be used for again, simultaneously, embedding heat conductive insulating fluid sealant in stator winding, it is more beneficial for distributing motor internal heat, use temperature range is wide, it it is-40 DEG C to 140 DEG C in ambient temperature, medium temperature is all can normally use in the scope of-40 DEG C to 100 DEG C, is especially suitable for hybrid vehicle and pure electric automobile；

Being additionally, since electronic water pump built-in electronic commutating structure (i.e. drive plate assemblies), by PWM Energy Saving Control, it may be achieved the stepless time adjustment of motor, thus controlling the changes in flow rate of water pump, meeting instructions for use。

Specifically, drive plate assemblies 6 is arranged in the heat radiation bonnet 12 of motor, screw be fastened on the end face in heat radiation bonnet 12。The effect of drive plate assemblies 6 is a kind of electronics commutation device, is made up of a pcb board, chip, six power switch transistors, power outlet and some other relevant electronic devices and components。Wherein power tube must adopt insulating heat-conductive silica gel piece to separate with the end face of heat radiation bonnet, and heat-conducting silica gel sheet had both played the effect being delivered to by the heat that power tube produces on heat radiation bonnet, played again insulating effect；

Drive plate assemblies 6 is connected by three screw fastenings with heat radiation bonnet 12。Drive plate assemblies is not only connected with external power cord, also it is connected with the stator winding (being alternatively referred to as stator coil assembly) of motor internal, stator winding has six groups of enamel-covered wire elements, they are formed a phase between two by the element of relative direction, form three-phase altogether, adopting star connection between phase and phase, being connected with the power transistor in drive plate assemblies thus forming the lead-in wire of three external connections。During work, first drive plate assemblies receives the current signal from stator winding, and this signal is turned on and off by certain logical requirements through amplifying the logic control trigger power transistor with chip program, thus external power supply is introduced stator winding。

When mounted, the triple line of stator winding causes the containing cavity within heat radiation bonnet 12 by the wire hole of the bonnet 12 that dispels the heat, and through the wire hole of drive plate assemblies 6, is then welded in drive plate assemblies 6。Drive plate assemblies 6 is fixed by screws on heat radiation bonnet 12, the wire hole of power line (or having speed governing line, diagnostics lines) traverse heat radiation bonnet 12, then pass through the wire hole of outlet cushion rubber, wherein outlet cushion rubber is two ends slightly middle thin parts, fills in the wire hole of heat radiation bonnet 12 and blocks herein above。Equipped with sealing ring on rear end cap 10, it is fixed by screws on heat radiation bonnet 12, can effectively prevent liquid from entering heat radiation bonnet 12 internal。

In use, after power line is connected, drive plate assemblies 6 is started working, by controlling the energising sequential of three-phase stator winding, control stator winding and produce rotating excitation field, rotating excitation field acts on the magnetic sheet (or being called magnet steel) on vane rotor assembly, magnetic sheet impeller rotor assembly is made to rotate, the rotation of impeller, makes fluid produce centrifugal motion, under the influence of centrifugal force, the runner that fluid is formed along pump cover and separation sleeve moves, pressure is stepped up, and is finally flowed out by outlet, and the flow direction of fluid refers to the arrow in Fig. 3。Due to the existence of height nip in pump chamber, the heat dissipation cavity being always shaped as at separation sleeve and vane rotor is circulated by fluid, takes away the heat of motor self and the heat of drive plate assemblies generation；The addition of heat conductive insulating sealant layer, makes complete machine temperature more uniform, and heat-conducting effect is better；It is delivered to the heat of motor casing, is dispelled the heat by the radiating fin on motor casing。

The foregoing is only the schematic detailed description of the invention of this utility model, be not limited to scope of the present utility model。Any those skilled in the art, the equivalent variations made under the premise without departing from design of the present utility model and principle and amendment, all should belong to the scope of this utility model protection。And it should be noted that, each ingredient of the present utility model is not limited in above-mentioned overall applicability, each technical characteristic described in description of the present utility model can select an independent employing according to actual needs or select the multinomial use that combines, therefore, this utility model covers other combination relevant with this case inventive point in the nature of things and specifically applies。

Claims (10)

1. an electronic water pump, it is characterised in that described electronic water pump includes:

Motor casing, is in a cylindrical shape, and is connected to drive plate assemblies outside it；

Stator winding, is set in inside described motor casing, and electrically connects with described drive plate assemblies, and can produce rotating excitation field under the control of described drive plate assemblies；

Separation sleeve, is set in inside described stator winding, and has annular chamber inside it, and the front end of described separation sleeve is opening, and rear end is blind end, the central axial installation mandrel of described separation sleeve；

Vane rotor assembly, it is located in described annular chamber, and can be set in rotationally outside described mandrel, described vane rotor assembly includes impeller and connects described impeller and the rotor relative with described stator winding, and described rotor drives described wheel rotation under the effect of described rotating excitation field；

Pump cover, is sealedly connected on the opening of described separation sleeve, and docks the pump chamber forming accommodating described impeller with described separation sleeve, described pump cover offers the water inlet and outlet that connect with described pump chamber respectively。

2. electronic water pump as claimed in claim 1, it is characterized in that, described separation sleeve includes the overcoat of tubular and is connected to the support portion of central axial column of described overcoat, described annular chamber is formed between described overcoat and described support portion, the central axial of described support portion wears described mandrel, the sheathed described rotor in outside of described support portion, described overcoat is by described stator winding and the isolation of described vane rotor assembly。

3. electronic water pump as claimed in claim 2, it is characterised in that described vane rotor assembly also includes:

Adapter sleeve, is connected with described impeller, and one-body molded with described impeller；

Positioning sleeve, is socketed in inside described adapter sleeve, and is set in outside described support portion, and described rotor is coated between the lateral wall of described positioning sleeve and the medial wall of described adapter sleeve。

4. electronic water pump as claimed in claim 3, it is characterized in that, the fixing bearing inner race being made of ceramic materials outside described support portion, inside described positioning sleeve, the fixing bearing outer ring being made of ceramic materials and coordinating with described bearing inner race, described bearing outer ring and described bearing inner race constitute ceramic bearing。

5. electronic water pump as claimed in claim 4, it is characterised in that described ceramic bearing is two, and is respectively positioned at the first ceramic bearing of front end, described support portion and is positioned at the second ceramic bearing of rear end, described support portion。

6. electronic water pump as claimed in claim 2, it is characterised in that described mandrel has the external part stretching out described support portion, described impeller and described pump cover and is sequentially sleeved at outside described external part, and described impeller, against described impeller, is axially positioned by described pump cover。

7. the electronic water pump as described in any one of claim 1 to 6, it is characterised in that the cavity between described separation sleeve and described vane rotor assembly is heat dissipation cavity, described heat dissipation cavity and described pump chamber constitute fluid flow passageway。

8. the electronic water pump as described in any one of claim 1 to 6, it is characterised in that described pump cover is scroll casing shape, described pump chamber is spiral case inner chamber, near the pressure in the region of described outlet in described spiral case inner chamber, more than the pressure in the region near described water inlet。

9. the electronic water pump as described in any one of claim 1 to 6, it is characterised in that having filling chamber between described stator winding and described separation sleeve, described filling intracavity is provided with heat conductive insulating sealant layer。

10. the electronic water pump as described in any one of claim 1 to 6, it is characterised in that being sealedly connected with ring flange between leading section and the described pump cover of described motor casing, described ring flange and described separation sleeve are tightly connected。