CN205478368U - Centrifugal pump - Google Patents

Abstract

The utility model discloses a centrifugal pump, including last pump case, heating element, impeller, lower pump case and motor, go up the rotor cavity portion that the pump case has outer shell and prescribes a limit to rotor cavity, outer shell with the integrated into one piece of rotor cavity portion, heating element installs in the outer shell and with outer shell prescribes a limit to the heating pump chamber jointly, heating element is last be equipped with with the entry of heating pump chamber intercommunication just be equipped with in the outer shell with the export of heating pump chamber intercommunication, the impeller is rotatably established the heat pump intracavity, pump case detachably installs down go up on the pump case and with rotor cavity portion injects the bore of stator jointly, the motor is including establishing stator in the bore of stator with establish in the rotor cavity and with the rotor that the impeller transmission is connected. According to the utility model discloses a centrifugal pump has that space utilization height, simple structure, assembly efficiency are high, axial dimensions is little and water conservancy performance advantage such as good.

Description

Centrifugal pump

Technical field

This utility model relates to pumping technology field, especially relates to a kind of centrifugal pump.

Background technology

In correlation technique, for heating by convection cell, situation the about again fluid heated being pumped, generally Arranging a heater and a pumping installations, the structure of equipment is complicated, and bulky, space availability ratio is low.

To this end, occur in that and heater completely or partially imbedded in pump case so that heater exists with pumping installations combination Centrifugal pump together, but centrifugal pump assembling parts are more, and efficiency of assembling is low, and has assembled the axial long of rear rotor Degree is relatively big, thus causes the axial length of whole centrifugal pump big.Additionally, the positional precision between impeller and entrance is difficult to control System, affects the hydraulic performance of centrifugal pump.

Utility model content

This utility model is intended at least to solve one of technical problem present in prior art.To this end, this utility model needs Thering is provided a kind of centrifugal pump, described centrifugal pump has space availability ratio height, simple in construction, efficiency of assembling chi high, axial Very little little, the advantage such as hydraulic performance is good.

According to the centrifugal pump of this utility model embodiment, including upper pump case, described upper pump case has housing department and limiting and turns The rotor chamber portion in sub-chamber, described housing department is one-body molded with described rotor chamber portion；Heating assembly, described heating assembly is arranged on Jointly limiting heating pump chamber on described housing department and with described housing department, described heating assembly is provided with and described heating pump chamber Entrance and the described housing department of connection are provided with the outlet connected with described heating pump chamber；Impeller, described impeller rotatably sets At described heat pump intracavity；Lower pump case, described lower pump case be removably mounted on described upper pump case and with described rotor chamber portion Jointly limit bore of stator；Motor, described motor include the stator being located in described bore of stator and be located in described rotor chamber and The rotor being in transmission connection with described impeller.

According to the centrifugal pump of this utility model embodiment, being integrated with heating and pump function, space availability ratio is high, and logical Cross housing department and the one-body molded processing in rotor chamber portion, not only reduce assembling parts, simplify centrifugal pump structure, Improve efficiency of assembling, and reduce the axial length of rotor, thus reduce the axial length of whole centrifugal pump.This Outward, it is formed in one part due to upper pump case, it is to avoid housing department affects impeller and entrance with the rigging error in rotor chamber portion Between positional precision, thus improve the hydraulic performance of centrifugal pump.

It addition, also have the technical characteristic added as follows according to the centrifugal pump of this utility model embodiment:

According to embodiments more of the present utility model, described rotor is wet rotor.

According to embodiments more of the present utility model, described impeller is half-opened impeller, guides when described half-opened impeller rotates The fluid entered by described entrance diffuses to described outlet and described fluid at spiral along the radially outward spiral of described heating assembly Under the effect of described half-opened impeller, described heating assembly is poured into during diffusion.

In embodiments more of the present utility model, described half-opened impeller includes: wheel plate, and described wheel plate passes with described rotor It is dynamically connected；Multiple spiral stators, multiple described spiral stators be located on the surface towards described heating assembly of described wheel plate and From the center of described wheel plate to the edge spiral extension of described wheel plate.

Alternatively, the center towards the surface of described heating assembly of described wheel plate is provided with and guides the stream entered by described entrance The diversion column of body extremely multiple described spiral stators, described diversion column is in transmission connection with described rotor.

Preferably, one end of the neighbouring described diversion column of each described spiral stator is respectively provided with the outer peripheral face phase with described diversion column Tilting section even, described tilting section towards described diversion column and be directed away from described heating towards the surface of described heating assembly The direction of assembly tilts to extend.

Alternatively, described wheel plate constructs the oriented direction away from described heating assembly to cave in and circumferentially extending along described wheel plate Annular recess.

According to embodiments more of the present utility model, described heating assembly includes: outer housing, and described outer housing is arranged on described shell In portion, described entrance is located on described outer housing；Heating plate, described heating plate be arranged on described outer housing and with described housing department Jointly limiting described heating chamber, described heating plate dodges out described entrance.

In alternative embodiment of the present utility model, described outer housing is provided with the inlet tube connected with described entrance, described heating Plate is the annular heating plate with central through hole, and described central through hole is corresponding with described inlet tube position.

Further, the inner edge of described heating plate and periphery are along respectively and being sealed by sealing ring between described outer housing, described It is provided with thermal insulation barriers between the inner edge of heating plate and/or edge, periphery and corresponding described sealing ring.

In alternative embodiment of the present utility model, in the outer peripheral face of described heating plate and the surface of the most described impeller at least One is provided with resistive coating.

According to embodiments more of the present utility model, the central axis of described entrance, the central axis of described upper pump case, described The central axis of lower pump case, the central axis of described heating assembly, the central axis of described impeller and the central shaft of described motor Line overlaps, and described outlet is located on the periphery wall of described housing department and central axis is tangent with the periphery wall of described housing department.

Additional aspect of the present utility model and advantage will part be given in the following description, and part will be from explained below In become obvious, or recognized by practice of the present utility model.

Accompanying drawing explanation

Fig. 1 is the axonometric chart of the centrifugal pump according to this utility model embodiment；

Fig. 2 is the sectional view of the centrifugal pump according to this utility model embodiment；

Fig. 3 is the explosive view of the centrifugal pump according to this utility model embodiment.

Reference:

Centrifugal pump 1,

Upper pump case 100, housing department 110, heating pump chamber 111, outlet 112, rotor chamber portion 120, rotor chamber 121,

Heating assembly 200, outer housing 210, inlet tube 211, entrance 212, heating plate 220,

Impeller 300, wheel plate 310, annular recess 311, spiral stator 320, diversion column 330, tilting section 340,

Lower pump case 400, bore of stator 401,

Motor 500, stator 510, rotor 520.

Detailed description of the invention

Of the present utility model embodiment is described below in detail, and the example of described embodiment is shown in the drawings, the most ad initio Represent same or similar element to same or similar label eventually or there is the element of same or like function.Lead to below It is exemplary for crossing the embodiment being described with reference to the drawings, and is only used for explaining this utility model, and it is not intended that to this reality With novel restriction.

Describing the centrifugal pump 1 according to this utility model embodiment below with reference to Fig. 1-Fig. 3, this centrifugal pump 1 has space The advantages such as utilization rate height, simple in construction, efficiency of assembling are high, axial dimension is little, hydraulic performance is good.

As shown in Figure 1-Figure 3, according to the centrifugal pump 1 of this utility model embodiment, including upper pump case 100, heating assembly 200, impeller 300, lower pump case 400 and motor 500.

Specifically, upper pump case 100 has housing department 110 and rotor chamber portion 120, housing department 110 and rotor chamber portion 120 One-body molded, rotor chamber portion 120 limits rotor chamber 121.Heating assembly 200 is arranged on housing department 110, and heating Assembly 200 jointly limits heating pump chamber 111 with housing department 110, and heating assembly 200 is provided with and heats pump chamber 111 even Logical entrance 212, housing department 110 is provided with and heats the outlet that pump chamber 111 connects.Such as, heating assembly 200 times Surface is formed as heating the roof of pump chamber 111, and the fluid in such heating pump chamber 111 can be heated assembly 200 and heat. Impeller 300 is rotatably provided in heating pump chamber 111.Lower pump case 400 is removably mounted on pump case 100, and under Pump case 400 and rotor chamber portion 120 limit bore of stator 401 jointly.Motor 500 includes stator 510 and rotor 520, stator 510 are located in bore of stator 401, in rotor 520 is located at rotor chamber 121 and are in transmission connection with impeller 300.Wherein, rotor 520 can be that wet rotor, i.e. rotor 520 can not carry out waterproof setting, thus centrifugal pump 1 is applied widely.

Below with reference to the accompanying drawings the heating pumping procedure of centrifugal pump 1 according to this utility model embodiment is described.

Fluid from inlet 212 enters heating pump chamber 111 and motor 500 drives impeller 300 to rotate, and the flowing of fluid is at impeller Presenting the radial direction spiral from inside to outside diffusion along heating assembly 200 under the drive of 300, the curve resistance of fluid flowing is little and flows Body can flow through the lower surface of heating assembly 200 and be fully contacted with heating assembly 200, increases the heating surface (area) (HS of fluid, Finally, heated fluid is flowed out by outlet under the influence of centrifugal force.

Centrifugal pump 1 according to utility model embodiment, by being assembled to heating assembly 200 on housing department 110 and and shell Portion 110 limits heating pump chamber 111 jointly, thus is integrated with heating and pump function, and the compact conformation of centrifugal pump 1, Volume is little, improves the space availability ratio of centrifugal pump 1.

Further, by by housing department 110 and the one-body molded processing in rotor chamber portion 120, not only reducing assembling parts, Simplify the structure of centrifugal pump 1, improve efficiency of assembling, and reduce the axial length of rotor 520, thus reduce The axial length of whole centrifugal pump 1.Additionally, due to upper pump case 100 is formed in one part, it is to avoid housing department 110 And the rigging error in rotor chamber portion 120 affects the positional precision between impeller 300 and entrance 212, thus improve from The hydraulic performance of heart pump 1.

According to embodiments more of the present utility model, as in figure 2 it is shown, the central axis of upper pump case 100 is fixed along the vertical direction It is arranged on the upper end of housing department 110 to, heating assembly 200 and motor 500 is positioned at the bottom of lower pump case 400, impeller 300 lower sections being positioned at heating assembly 200.The central axis of entrance 212, the central axis of upper pump case 100, lower pump case Central axis, the heating central axis of assembly 200, the central axis of impeller 300 and the central shaft of motor 500 of 400 Line overlaps, and outlet is located on the periphery wall of housing department 110 and central axis is tangent with the periphery wall of housing department 110. Thereby simplify the structure of centrifugal pump 1, and reduce volume, and the hydraulic performance of centrifugal pump 1 is good.

In the embodiment shown in Fig. 2 and Fig. 3, impeller 300 can be half-opened impeller, when half-opened impeller rotates, draws Lead the fluid entered by entrance 212 and diffuse to outlet along the radially outward spiral heating assembly 200, and described fluid is at spiral Under the effect of half-opened impeller, heating assembly 200 is poured into during diffusion.So, impeller 300 is during rotating The lower surface of fluid impact heating assembly 200 can be driven simultaneously, thus improve heats further.

Need exist for being emphasized that, prior art use the centrifugal pump of double shrouded wheel, impeller only can guide when rotating fluid to External diffusion, without driving fluid impact heater.

Thus, use half-opened impeller to carry out water conservancy diversion, eliminate flow guiding disc of the prior art, on the one hand can make fluid spiral shell Rotation diffusion also pours into heating assembly 200, it is ensured that fluid is fully contacted with heating assembly 200, and then improves heats, separately On the one hand owing to eliminating flow guiding disc, structure is simpler, and cost is lower.It is to say, according to this utility model embodiment Centrifugal pump 1 in the case of saving existing flow guiding disc, it is possible to reach more excellent heats.

Additionally, use half-opened impeller to carry out water conservancy diversion so that heating assembly 200 does not affect the shape design of housing department 110, Housing department 110 can be designed to spiral-shaped, and such as, housing department 110 can be cylindrical or scroll casing shape, coordinates bend Lose less spiral diversion, thus the hydraulic performance of centrifugal pump 1 is good.

In embodiments more of the present utility model, as shown in Figures 2 and 3, half-opened impeller can include wheel plate 310 He Multiple spiral stators 320.Wheel plate 310 for circular slab and is in transmission connection with rotor 520.Multiple spiral stators 320 are located at wheel On the surface (i.e. the upper surface of the wheel plate 310 shown in figure) towards heating assembly 200 of plate 310, and multiple spiral is led Leaf 320 from the center of wheel plate 310 to the edge spiral extension of wheel plate 310, the spiral of plurality of spiral stator 320 Direction is consistent with the direction of rotation of wheel plate 310.Thus, rotor 520 drives wheel plate 310 to rotate, and carries when wheel plate 310 rotates Dynamic multiple spiral stators 320 thereon rotate, and wheel plate 310 and multiple spiral stator 320 jointly guide and entered by entrance 212 Fluid along the radial direction spiral from the inside to the outside diffusion of the lower surface of heating assembly 200, and, wheel plate 310 be only one and Below multiple spiral stators 320, without other wheel plates above multiple spiral stators 320, thus constitute semi-open type structure, stream Body also can pour into the lower surface of heating assembly 200 during the outside diffusional flow of spiral under the effect of half-opened impeller, Thus with heating assembly 200 the abundant heat exchange of lower surface, improve heat transfer effect.

Alternatively, as shown in Figures 2 and 3, surface (the i.e. wheel shown in figure towards heating assembly 200 of wheel plate 310 The upper surface of plate 310) center be provided with diversion column 330, entrance 212 the diversed post of fluid 330 entered guide to Multiple spiral stators 320, and diversion column 330 is in transmission connection with rotor 520, such as, the lower surface of diversion column 330 is permissible Being provided with the armature spindle pilot hole of through wheel plate 310, the armature spindle of rotor 520 can coordinate in this armature spindle pilot hole and week To orientation.Thus, on the one hand half-opened impeller can be facilitated to be in transmission connection with rotor 520, on the other hand fluid falls water conservancy diversion Can disperse to the surrounding of diversion column 330 after on post 330, thus rapidly enter multiple spiral stator 320.Wherein, water conservancy diversion Post 330 can be cone, frustoconical or segment-shaped, and diversion column 330 and entrance 212 position pair in the vertical direction Should.

Preferably, as shown in Figures 2 and 3, one end of the neighbouring diversion column 330 of each spiral stator 320 is respectively provided with and leads The tilting section 340 that the outer peripheral face of fluidization tower 330 is connected.The surface towards heating assembly 200 of tilting section 340 is towards diversion column 330 and be directed away from heat assembly 200 direction tilt extend, i.e. the upper surface of tilting section 340 slopes inwardly and downwardly Extend.In other words, the upper surface of tilting section 340 is the inclined plane being inclined relative to horizontal, the neighbouring water conservancy diversion of this inclined plane One end of post 330 is less than the other end of this inclined plane.So fluid is after entrance 212 is fallen diversion column 330, through water conservancy diversion Post 330 guides can be even into multiple spiral stators 320, and water resistance is little.

Alternatively, as in figure 2 it is shown, the oriented direction depression away from heating assembly 200 can be constructed on wheel plate 310 and along wheel The circumferentially extending annular recess 311 of plate 310.It is to say, be configured with a ring shape on wheel plate 310 and concave downward Recess, the central axis of this recess and the central axes of wheel plate 310 and arrange around diversion column 330.Wheel plate 310 During rotation, can push to fluid further heat at the outer peripheral edge of the lower surface of assembly 200, thus improve fluid further Heat transfer effect with heating assembly 200.

According to embodiments more of the present utility model, as shown in Figure 1-Figure 3, heating assembly 200 can include outer housing 210 He Heating plate 220.Outer housing 210 is arranged on housing department 110, and entrance 212 is located on outer housing 210.Heating plate 220 is installed Jointly limiting heating chamber on outer housing 210 and with housing department 110, heating plate 220 dodges out entrance 212.Thus, add Hot plate 220 neighboring entry 212 is arranged, and the lower surface of heating plate 220 constitutes the top wall surface of heating pump chamber 111.

Advantageously, as shown in Figure 1-Figure 3, centrifugal pump 1 is connected with outside pipeline for convenience, and outer housing 210 can set There is the inlet tube 211 connected with entrance 212, the sidewall of housing department 110 can be provided with the outlet 113 with outlet.

Specifically, as shown in Figure 1-Figure 3, heating plate 220 can be the annular heating plate 220 with central through hole, institute State central through hole corresponding with inlet tube 211 position.Further, the inner edge of heating plate 220 and periphery along respectively with outer housing Sealed by sealing ring (not shown) between 210, the inner edge of heating plate 220 and/or edge, periphery and corresponding sealing Thermal insulation barriers (not shown) it is provided with between circle.Thermal insulation barriers can be welded on the inner edge of heating plate 220 and/or periphery along upper, And can weld with outer housing 210, thermal insulation barriers so can be utilized heat insulation, the temperature of reduction heating plate 220 shadow to sealing ring Ring.

In alternative embodiment of the present utility model, in the surface of the outer peripheral face of heating plate 220 and dorsad impeller 300 at least One is provided with resistive coating.In other words, at least one surface in the multiple surfaces not contacted with fluid of heating plate 220 It is provided with resistive coating.Such as, the upper surface of heating plate 220 coating resistive coating, heat is delivered to heating plate 220 Fluid in heating pump chamber 111 is also heated by lower surface.Certainly, the upper surface of heating plate 220 and outer peripheral face can all be coated with Cover resistive coating.Preferably, resistive coating can be thick-film resistor.

Below with reference to the accompanying drawings describe the centrifugal pump 1 according to a specific embodiment of the present utility model in detail, be worth understanding It is, simply exemplary illustration described below, and it is not intended that to restriction of the present utility model.

As shown in Figure 1-Figure 3, according to the centrifugal pump 1 of this utility model embodiment, including upper pump case 100, heating assembly 200, impeller 300, lower pump case 400 and motor 500.

Specifically, the central axis of upper pump case 100 orients along the vertical direction, and upper pump case 100 has housing department 110 One-body molded with rotor chamber portion 120, housing department 110 and rotor chamber portion 120.Lower pump case 400 is removably mounted on pump On shell 100, and lower pump case 400 limits bore of stator 401 jointly with rotor chamber portion 120, and rotor chamber portion 120 limits and turns Sub-chamber 121.Motor 500 includes stator 510 and rotor 520, in stator 510 is located at bore of stator 401 and be positioned at lower pump case The bottom of 400, rotor 520 is for wet rotor and is located in rotor chamber 121.

Heating assembly 200 includes outer housing 210 and heating plate 220, and outer housing 210 is arranged on upper end and the heating plate of housing department 110 220 are arranged on outer housing 210, and heating plate 220 jointly limits heating pump chamber 111 with housing department 110, and outer housing 210 divides It is not provided with and heats the entrance 212 that pump chamber 111 connects and the inlet tube 211 connected with entrance 212, outside housing department 110 It is respectively equipped with on perisporium and heats outlet that pump chamber 111 connects and the outlet 113 with outlet, the central axis of outlet Tangent with the periphery wall of housing department 110.Wherein, heating plate 220 is the annular heating plate 220 with central through hole, institute State central through hole corresponding with inlet tube 211 position in the vertical direction.

Impeller 300 is rotatably provided in heating pump chamber 111 and is positioned at the lower section of heating plate 220, and impeller 300 is semi-open type Impeller also includes wheel plate 310 and multiple spiral stator 320.Wheel plate 310 is circular slab, and wheel plate 310 is configured with to recessed Fall into and along the circumferentially extending annular recess 311 of wheel plate 310, the center of the upper surface of wheel plate 310 be provided with diversion column 330, Diversion column 330 is corresponding with entrance 212 position in the vertical direction, and the lower surface of diversion column 330 is provided with through wheel plate 310 Armature spindle pilot hole, the armature spindle of rotor 520 coordinates in this armature spindle pilot hole and circumferential orientation.Multiple spiral stators On 320 upper surfaces being located at wheel plate 310, and multiple spiral stator 320 from the center of wheel plate 310 to the limit of wheel plate 310 Spiral extension at Yan, the hand of spiral of plurality of spiral stator 320 is consistent with the direction of rotation of wheel plate 310, each spiral One end of the neighbouring diversion column 330 of stator 320 is respectively provided with the tilting section 340 that the outer peripheral face with diversion column 330 is connected, and tilts The upper surface of section 340 slopes inwardly and downwardly extension.

As in figure 2 it is shown, in the central axis of entrance 212, the central axis of housing department 110, rotor chamber portion 120 Mandrel line, the central axis of lower pump case 400, heating the central axis of assembly 200, the central axis of impeller 300 and The central axis of motor 500 overlaps.

Below with reference to the accompanying drawings the heating pumping procedure of centrifugal pump 1 according to this utility model embodiment is described.

Fluid from inlet 212 enters heating pump chamber 111 and rotor 520 drives wheel plate 310 to rotate, and carries when wheel plate 310 rotates Dynamic multiple spiral stators 320 thereon rotate, and wheel plate 310 and multiple spiral stator 320 jointly guide and entered by entrance 212 Fluid spread along the radial direction spiral from the inside to the outside of the lower surface of heating plate 220, the curve resistance of fluid flowing is little and fluid can To flow through the lower surface of heating plate 220 and to be fully contacted with heating plate 220, increase the heating surface (area) (HS of fluid, additionally, by It is semi-open type structure in impeller 300, the lower surface of fluid impact heating plate 220 during rotation, can be driven simultaneously, thus Improve heats further.Finally, heated fluid is under the influence of centrifugal force by exporting and being flowed by outlet 113 Go out.

Centrifugal pump 1 according to this utility model embodiment, is integrated with heating and pump function, and by by housing department 110 Processing one-body molded with rotor chamber portion 120, simple in construction, efficiency of assembling are high, axial dimension is little, hydraulic performance good.

Other of centrifugal pump 1 according to this utility model embodiment constitute and operate for those of ordinary skills It is all known, is not detailed herein.

In description of the present utility model, it is to be understood that term " " center ", " length ", " on ", D score, "front", "rear", " level ", " top ", " end ", " interior ", " outward ", " axially ", " radially ", Orientation or the position relationship of the instruction such as " circumferential " are based on orientation shown in the drawings or position relationship, are for only for ease of Describe this utility model and simplification description rather than instruction or the device of hint indication or element must have specific side Position, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " the One ", " second " is only used for describing purpose, and it is not intended that instruction or hint relative importance or implicit indicate The quantity of indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or hidden One or more this feature are included containing ground.In description of the present utility model, except as otherwise noted, " multiple " It is meant that two or more.

In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace Dress ", should be interpreted broadly " being connected ", " connection ", for example, it may be fix connection, it is also possible to be detachable Connect, or be integrally connected；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to It is indirectly connected to by intermediary, can be the connection of two element internals.For those of ordinary skill in the art Speech, can understand above-mentioned term concrete meaning in this utility model with concrete condition.

In the description of this specification, reference term " embodiment ", " some embodiments ", " specific embodiment ", It is concrete that the description of " alternative embodiment ", " example " or " some examples " etc. means to combine this embodiment or example describes Feature, structure, material or feature are contained at least one embodiment of the present utility model or example.In this manual, The schematic representation of above-mentioned term is not necessarily referring to identical embodiment or example.And, the specific features of description, knot Structure, material or feature can combine in any one or more embodiments or example in an appropriate manner.

Embodiment the most of the present utility model, it will be understood by those skilled in the art that: These embodiments can be carried out in the case of without departing from principle of the present utility model and objective multiple change, amendment, Replacing and modification, scope of the present utility model is limited by claim and equivalent thereof.

Claims (12)

1. a centrifugal pump, it is characterised in that including:

Upper pump case, described upper pump case has housing department and limits the rotor chamber portion of rotor chamber, and described housing department is one-body molded with described rotor chamber portion；

Heating assembly, described heating assembly is arranged on described housing department and jointly limits heating pump chamber with described housing department, and described heating assembly is provided with the entrance connected with described heating pump chamber and described housing department is provided with the outlet connected with described heating pump chamber；

Impeller, described impeller is rotatably provided in described heat pump intracavity；

Lower pump case, described lower pump case is removably mounted on described upper pump case and jointly limits bore of stator with described rotor chamber portion；

Motor, the rotor in described motor includes the stator being located in described bore of stator and is located at described rotor chamber and being in transmission connection with described impeller.

Centrifugal pump the most according to claim 1, it is characterised in that described rotor is wet rotor.

Centrifugal pump the most according to claim 1, it is characterized in that, described impeller is half-opened impeller, guides the fluid that entered by described entrance to diffuse to described outlet and described fluid along the radially outward spiral of described heating assembly and pour into described heating assembly under the effect of described half-opened impeller during spiral spreads when described half-opened impeller rotates.

Centrifugal pump the most according to claim 3, it is characterised in that described half-opened impeller includes:

Wheel plate, described wheel plate is in transmission connection with described rotor；

Multiple spiral stators, multiple described spiral stators are located on the surface towards described heating assembly of described wheel plate and from the center of described wheel plate to the edge spiral extension of described wheel plate.

Centrifugal pump the most according to claim 4, it is characterized in that, the center towards the surface of described heating assembly of described wheel plate is provided with the diversion column guiding the fluid entered by described entrance extremely multiple described spiral stators, and described diversion column is in transmission connection with described rotor.

Centrifugal pump the most according to claim 5, it is characterized in that, one end of the neighbouring described diversion column of each described spiral stator is respectively provided with the tilting section that the outer peripheral face with described diversion column is connected, described tilting section towards the surface of described heating assembly towards described diversion column and be directed away from described heating assembly direction tilt extend.

Centrifugal pump the most according to claim 4, it is characterised in that construct oriented away from the direction depression of described heating assembly and the circumferentially extending annular recess along described wheel plate on described wheel plate.

8. according to the centrifugal pump according to any one of claim 1-7, it is characterised in that described heating assembly includes:

Outer housing, described outer housing is arranged on described housing department, and described entrance is located on described outer housing；

Heating plate, described heating plate is arranged on described outer housing and jointly limits described heating chamber with described housing department, and described heating plate dodges out described entrance.

Centrifugal pump the most according to claim 8, it is characterised in that described outer housing is provided with the inlet tube connected with described entrance, described heating plate is the annular heating plate with central through hole, and described central through hole is corresponding with described inlet tube position.

Centrifugal pump the most according to claim 9, it is characterized in that, the inner edge of described heating plate and periphery, along respectively and being sealed by sealing ring between described outer housing, are provided with thermal insulation barriers between the inner edge of described heating plate and/or edge, periphery and corresponding described sealing ring.

11. centrifugal pumps according to claim 8, it is characterised in that at least one in the outer peripheral face of described heating plate and the surface of the most described impeller is provided with resistive coating.

12. centrifugal pumps according to claim 1, it is characterized in that, the central axis of the central axis of described entrance, the central axis of described upper pump case, the central axis of described lower pump case, the central axis of described heating assembly, the central axis of described impeller and described motor overlaps, and described outlet is located on the periphery wall of described housing department and central axis is tangent with the periphery wall of described housing department.