WO2017054310A1 - 离心泵 - Google Patents

离心泵 Download PDF

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Publication number
WO2017054310A1
WO2017054310A1 PCT/CN2015/096349 CN2015096349W WO2017054310A1 WO 2017054310 A1 WO2017054310 A1 WO 2017054310A1 CN 2015096349 W CN2015096349 W CN 2015096349W WO 2017054310 A1 WO2017054310 A1 WO 2017054310A1
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WO
WIPO (PCT)
Prior art keywords
heating device
chamber
heating
pump
centrifugal pump
Prior art date
Application number
PCT/CN2015/096349
Other languages
English (en)
French (fr)
Inventor
顾文海
武秋红
史长忠
迟闯
Original Assignee
佛山市威灵洗涤电机制造有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 佛山市威灵洗涤电机制造有限公司 filed Critical 佛山市威灵洗涤电机制造有限公司
Priority to US15/763,844 priority Critical patent/US20180283399A1/en
Priority to EP15905222.4A priority patent/EP3358197A4/en
Publication of WO2017054310A1 publication Critical patent/WO2017054310A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F04D29/4273—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps suction eyes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • F04D29/5866—Cooling at last part of the working fluid in a heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/51—Inlet

Definitions

  • the invention relates to the field of pumping technology, and in particular to a centrifugal pump.
  • the present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention needs to provide a centrifugal pump which has the advantages of simple structure, good hydraulic performance and high heating efficiency.
  • a centrifugal pump includes: a pump casing having a heating chamber and a pump chamber communicating with the heating chamber, the pump casing being provided with an inlet and a communication with the heating chamber An outlet of the pump chamber; a heating device, the heating device is disposed on the pump casing; a flow guiding member, the flow guiding member is disposed in the heating cavity, and the flow guiding member is in the heating cavity a diffusion flow path defining a diffusion flow path that directs fluid entering by the inlet along a radial outward direction of the heating device and a fluid that directs diffusion to concentrate in a radial direction of the heating device to a concentrated flow of the pump chamber An impeller, the impeller being disposed within the pump chamber and directing fluid concentrated to the pump chamber to the outlet.
  • the centrifugal pump has a compact structure and a small volume, which improves the space utilization rate of the centrifugal pump.
  • the heating device does not affect the shape design of the pump casing surrounding the impeller, and the pump casing surrounding the impeller can be designed in a spiral shape, so that the centrifugal pump has good hydraulic performance.
  • the curvature of the fluid entering from the inlet is small, and the fluid can be sufficiently heated by the heating means, thereby increasing the heating efficiency of the fluid.
  • the diffusion flow channel directs fluid entering by the inlet to spiral radially outwardly along the heating device, the concentrated flow channel directing the diffused fluid along the diameter of the heating device The inward spiral is concentrated to the pump chamber.
  • the flow guiding member includes: a partition; a plurality of positive spiral vanes, wherein the plurality of positive spiral vanes are disposed on a side of the partition facing the heating device and at a side of the partition facing the heating device defines the diffusion flow passage; a plurality of reverse spiral vanes, wherein the plurality of reverse spiral vanes are disposed on a side of the partition facing the pump chamber
  • the concentrated flow passage is defined laterally and on a side of the diaphragm that faces the pump chamber.
  • one of the positive helical guide vane and the reverse helical guide vane is offset clockwise from inner to outer along the radial direction of the diaphragm and the other is along the septum The radial direction of the plate is offset counterclockwise from inside to outside.
  • a plurality of the counter-helical vanes are attached to a bottom wall of the heating chamber, a plurality of the positive spiral vanes are attached to the baffle and the baffle is supported a plurality of said reverse spiral vanes.
  • a plurality of the reverse spiral vanes are integrally formed on the pump casing, and a plurality of the positive spiral vanes are integrally formed on the partition.
  • a positioning hole is disposed on the partition plate, and a positioning post is disposed on the reverse spiral guide vane, and the positioning post is fitted in the positioning hole.
  • the positioning pillars are plurality and are respectively disposed at inner ends of the corresponding reverse spiral guide vanes, and the positioning holes are plurality and are arranged along a circumferential interval of the partition plate, and the plurality of the positioning positions are The columns are respectively fitted in a plurality of the positioning holes.
  • a plurality of the counter-helical vanes and a plurality of the positive spiral vanes are coupled to the baffle and a plurality of the counter-helical vanes are supported in the heating chamber On the bottom wall.
  • a plurality of the reverse spiral guide vanes, a plurality of the positive spiral guide vanes, and the partition plate are integrally formed.
  • the pump casing has an inlet pipe extending into the heating chamber and the inlet is disposed on the inlet pipe, and an inner end of the positive spiral vane is provided with a matching groove.
  • One end of the inlet pipe extending into the heating chamber is fitted in a matching groove of the plurality of positive spiral vanes.
  • a flow guiding block guiding the fluid entering by the inlet to the plurality of positive helical guide vanes is provided at a center of the side surface of the partition facing the heating device.
  • the flow guiding block is conical and has a vertex arc transition.
  • the outer perimeter of the baffle is further adjacent the heating device relative to the pumping chamber and the center of the baffle is more adjacent to the pumping chamber relative to the heating device.
  • a central axis of the inlet, a central axis of the pump casing, a central axis of the heating device, a central axis of the flow guide, and a central axis of the impeller coincide with each other
  • the heating chamber and the pump chamber communicate at a central axis of the pump casing, the outlet being provided on an outer peripheral wall of the pump casing and having a central axis tangential to an outer peripheral wall of the pump casing.
  • the pump casing includes: a casing, the heating chamber and the pump chamber are formed in the casing, the outlet is disposed on the casing; a casing, the cover a body detachably mounted on the housing and pressing the heating device against an upper end of the housing; an inlet tube, the inlet tube being disposed on the cover, the inlet being disposed at the inlet On the tube.
  • the heating device is a toroidal heating plate having a central through hole that corresponds in position to the inlet in a vertical direction.
  • At least one of an upper surface and an outer peripheral surface of the heating device is provided with a resistance coating Floor.
  • the inner circumference and the outer circumference of the heating device are respectively sealed with the pump casing by a sealing ring, and the inner circumference and/or the outer circumference of the heating device and the corresponding portion A heat insulating member is arranged between the sealing rings.
  • the centrifugal pump further includes: a terminal box, the terminal box is disposed on the heating device; a terminal, the terminal is disposed in the terminal box and the heating device Electrically connected, the terminal is exposed from the pump casing.
  • FIG. 1 is an exploded view of a centrifugal pump in accordance with an embodiment of the present invention
  • FIG. 2 is a perspective view of a centrifugal pump in accordance with an embodiment of the present invention.
  • Figure 3 is a front elevational view of a centrifugal pump in accordance with an embodiment of the present invention.
  • Figure 4 is a cross-sectional view taken along line A-A of Figure 3;
  • Figure 5 is a left side view of a centrifugal pump in accordance with an embodiment of the present invention.
  • Figure 6 is a plan view of a centrifugal pump in accordance with an embodiment of the present invention.
  • Figure 7 is a perspective view of a partition and a positive spiral vane of a flow guide of a centrifugal pump in accordance with an embodiment of the present invention
  • Figure 8 is a front elevational view of a partition and a positive spiral vane of a flow guide of a centrifugal pump in accordance with an embodiment of the present invention
  • Figure 9 is a plan view of a partition and a positive spiral vane of a flow guide of a centrifugal pump in accordance with an embodiment of the present invention.
  • FIG. 10 is an exploded view of a centrifugal pump in accordance with another embodiment of the present invention.
  • Figure 11 is a perspective view of a flow guide of a centrifugal pump in accordance with another embodiment of the present invention.
  • Figure 12 is a front elevational view of a flow guide of a centrifugal pump in accordance with another embodiment of the present invention.
  • Figure 13 is a plan view of a flow guide of a centrifugal pump in accordance with another embodiment of the present invention.
  • Figure 14 is a cross-sectional view of a pump heater in accordance with a first alternative embodiment of the present invention.
  • Figure 15 is a perspective view of a housing of a pump heater in accordance with a first alternative embodiment of the present invention.
  • Figure 16 is a perspective view of a heating plate of a pump heater in accordance with a first alternative embodiment of the present invention.
  • Figure 17 is a perspective view of a pump heater in accordance with a second alternative embodiment of the present invention.
  • Figure 18 is a cross-sectional view of a pump heater in accordance with a second alternative embodiment of the present invention.
  • Pump housing 1 heating chamber 11, pump chamber 12, inlet tube 13, inlet 130, housing 14, outlet 140,
  • Pump heater 200 outer cover 21, cover body 211, heating device 22, upper space 201, lower space 202,
  • Sealing ring 5 first sealing ring 51, second sealing ring 52, heat insulating member 6, first heat insulating member 61, second heat insulating member 62, connecting terminal 7, terminal box 8.
  • a centrifugal pump 100 according to an embodiment of the present invention is described below with reference to FIGS. 1-13.
  • the centrifugal pump 100 is suitable for applications such as fluid delivery, cooling systems, household appliances, etc., and has the advantages of compact structure, small volume, and good hydraulic performance.
  • a centrifugal pump 100 includes a pump casing 1, a heating device 22, a flow guiding member 3, and an impeller 4.
  • the pump casing 1 has a heating chamber 11 and a pump chamber 12 communicating with the heating chamber 11, and the pump casing 1 is provided with an inlet 130 communicating with the heating chamber 11 and an outlet 140 communicating with the pump chamber 12.
  • the heating device 22 is disposed on the pump casing 1 and at least a portion thereof is located in the heating chamber 11.
  • the lower surface of the heating device 22 is formed as a top wall of the heating chamber 11, so that the fluid in the heating chamber 11 can be heated by the heating device 22.
  • the heating device 22 is annular and is heated by thick film resistance, so that the heating efficiency is high.
  • the flow guiding member 3 is disposed in the heating chamber 11, wherein the flow guiding member 3 defines a diffusion flow passage and a concentrated flow passage in the heating chamber 11, and the diffusion flow passage guides the fluid entering from the inlet 130 radially outward of the heating device 22.
  • the spiral diffusion, the concentrated flow path directs the diffused fluid to concentrate radially to the pump chamber 12 along the radial direction of the heating device 22.
  • the impeller 4 is disposed within a pump chamber 12 that directs fluid concentrated to the pump chamber 12 to an outlet 140.
  • the fluid flows into the heating chamber 11 from the inlet 130 and flows along the diffusion channel.
  • the flow of the fluid is diffused from the inside to the outside in the radial direction of the heating device 22, and then the fluid diffused through the diffusion channel flows into the concentrated flow channel.
  • the flow of the fluid appears to be concentrated from the outside to the inside in the radial direction of the heating device 22, such that not only the bending resistance of the fluid flow is reduced, the bending loss of the fluid is small, and the fluid is radially outward along the heating device 22.
  • the fluid can flow through the lower surface of the heating device 22 and is in full contact with the heating device 22, increasing the heating area of the fluid.
  • the heated fluid is concentrated and converged into the pump chamber 12, and then guided to the impeller 4 to flow to Exit 140.
  • the centrifugal pump 100 of the embodiment of the present invention by providing the heating device 22 in the heating chamber 11, the impeller 4 is disposed in the pump chamber 12, thereby integrating the heating and pumping functions, and the centrifugal pump 100 is compact and small in size.
  • the space utilization rate of the centrifugal pump 100 is improved.
  • the flow guiding member 3 causes the heating device 22 to not affect the shape of the pump casing 1 surrounding the impeller 4.
  • the pump casing 1 surrounding the impeller 4 can be designed in a spiral shape so that the hydraulic performance of the centrifugal pump 100 is good.
  • the use of the flow guiding member 3 makes the curve loss of the fluid small, and the fluid can be sufficiently heated by the heating device 22, thereby improving the heating efficiency of the fluid.
  • the diffusion flow passage may direct the fluid entering the inlet to spirally spread radially outwardly of the heating device 22, the concentrated flow passage directing the diffused fluid along the radial direction of the heating device 22.
  • the inward spiral is concentrated to the pump chamber 12.
  • the diffusion flow path can be formed as a spiral diffusion flow path
  • the concentrated flow path can be formed as a spiral concentrated flow path, which can further reduce the curve loss of the fluid and enable the fluid to flow more fully through the lower surface of the heating device 22. Thereby, the heating efficiency of the centrifugal pump 100 is further improved.
  • the flow guide 3 can include a diaphragm 31, a plurality of positive helical vanes 32, and a plurality of counter-helical vanes 33.
  • a plurality of positive spiral vanes 32 are provided on a side of the partition 31 facing the heating device 22 (as on the upper side of the partition 31 shown in the drawing), and a plurality of positive spiral vanes 32 are on the partition 31
  • the side defines a diffusion flow path
  • a plurality of reverse spiral guide vanes 33 are provided on a side of the partition 31 facing the pump chamber 12 (as shown on the lower side of the partition 31 shown in the drawing), and a plurality of reverse spiral guide vanes 33
  • a concentrated flow passage is defined on the lower side of the partition plate 31 such that the fluid entering from the inlet 130 is spirally diffused from the inside to the outside in the radial direction of the heating device 22 under the guidance of the diffusion flow passage, and the diffused fluid flows into the concentrated flow passage, respectively. Thereby, the heating efficiency of the fluid can be further improved.
  • one of the positive helical vane 32 and the counter-helical vane 33 may be offset clockwise from inner to outer along the radial direction of the diaphragm 31 and another along the diameter of the diaphragm 31. Offset from the inside to the outside counterclockwise, so that the fluid can be spirally diffused from the inside to the outside under the guidance of the diffusion channel, and concentrated by the outward to the inner spiral under the guidance of the concentrated flow channel, and the diffused fluid is in the diffusion channel and the concentrated flow.
  • the corner of the road has a small loss of corners. For example, as shown in FIG.
  • the positive spiral vane 32 may be offset clockwise from the inside to the outside in the radial direction of the partition 31, and the reverse spiral vane 33 is offset counterclockwise from the inside to the outside in the radial direction of the partition 31.
  • the positive spiral vane 32 is offset counterclockwise from the inside to the outside in the radial direction of the partition 31, and the reverse spiral vane 33 is clockwisely displaced from the inside to the outside in the radial direction of the partition 31.
  • a plurality of reverse spiral vanes 33 may be connected to the bottom wall of the heating chamber 11 , and a plurality of positive spiral vanes 32 may be Connected to the partition plate 31, the partition plate 31 is supported on the plurality of reverse spiral vanes 33, that is, the flow guiding member 3 has a separate structure, whereby the mounting position of the flow guiding member 3 in the heating chamber 11 can be achieved.
  • a plurality of reverse spiral vanes 33 may be integrally formed on the pump casing 1, and a plurality of positive spiral vanes 32 are integrally formed on the partition plate 31, so that the structure of the centrifugal pump 100 can be further simplified. The assembly process of the flow guide 3 is reduced.
  • the partitioning hole 31 may be provided with a positioning hole 310
  • the reverse spiral guide vane 33 is provided with a positioning post 331
  • the positioning post 331 is fitted in the positioning hole 310 , thereby The partition 31 can be firmly supported on the reverse spiral vane 33.
  • the positioning post 331 may be formed as a substantially rectangular parallelepiped, and the positioning hole 310 is formed as a general body. Rectangular holes for easy processing.
  • the positioning post 331 can also be a long cylinder, and the positioning hole 310 is formed as a circular hole, which is not particularly limited as long as the positioning post 331 can be matched with the positioning hole 310.
  • a plurality of positioning posts 331 there are a plurality of positioning posts 331, a plurality of positioning holes 310, a plurality of positioning posts 331 are respectively disposed at inner ends of the corresponding reverse spiral guide vanes 33, and a plurality of positioning holes 310 are spaced along the circumferential direction of the partition plate 31. It is provided that a plurality of positioning posts 331 are respectively fitted in the plurality of positioning holes 310, so that the connection between the partition plate 31 and the reverse spiral guide vanes 33 is more secure. For example, as shown in FIG. 1 , only one of the two opposite spiral guide vanes 33 is provided with a positioning post 331 , that is, an interval between two adjacent positioning posts 331 is not provided.
  • the reverse spiral guide vane 33 of the column 331 and the plurality of positioning holes 310 are respectively spaced apart from the plurality of positioning posts 331 in the circumferential direction of the partition plate 31, which facilitates the connection of the partition plate 31 and the reverse spiral guide vane 33.
  • a plurality of counter-helical vanes 33 and a plurality of positive helical vanes 32 are attached to the diaphragm 31, and a plurality of counter-helical vanes 33 are supported in the heating chamber 11
  • the flow guiding member 3 is a unitary piece, thereby facilitating the assembly of the flow guiding member 3.
  • a plurality of reverse spiral guide vanes 33, a plurality of positive spiral guide vanes 32 and a partition plate 31 may be integrally formed, thereby simplifying the production process of the flow guiding member 3, and facilitating the improvement of the centrifugal pump 100. Assembly efficiency.
  • the pump casing 1 has an inlet pipe 13 which is disposed on the inlet pipe 13, and the lower end of the inlet pipe 13 extends into the heating chamber 11, the positive spiral guide vane
  • the inner end of 32 is provided with a matching groove 320, and the lower end of the inlet pipe 13 is fitted in the matching groove 320 of the plurality of positive spiral vanes 32.
  • the engagement groove 320 can penetrate the inner end surface of the positive spiral vane 32 such that the inlet tube 13 can be securely fitted within the engagement groove 320 of the plurality of positive spiral vanes 32.
  • the flow guiding block 311 may be provided at the center of the foundation such that the fluid entering by the inlet 130 may flow to the plurality of positive spiral vanes 32 through the guiding of the flow guiding block 311.
  • the flow guiding block 311 can be conical, and the apex arc of the flow guiding block 311 is circularly transformed, so that when the fluid falls on the apex of the flow guiding block 311, the flow can be dispersed around the flow block 311, so that the fluid can smoothly flow into the diffusion. Flow path.
  • the outer periphery of the partition 31 is further adjacent to the heating device 22 with respect to the pump chamber 12, the center of the partition 31 being closer to the pump chamber 12 relative to the heating device 22, i.e., the partition 31 is funnel shaped .
  • the partition plate 31 is recessed downward in the radial direction from the outside to the inside, and the outer peripheral edge of the partition plate 31 is located above the center of the partition plate 31, and the longitudinal section of the partition plate 31 is formed as The generally conical surface allows the fluid to be sufficiently heated by the heating device 22 to further increase the heating efficiency of the fluid.
  • the partition plate 31 can also extend in the horizontal direction, so that the structure of the partition plate 31 is simple and the production and processing are convenient.
  • the central axis of the inlet 130, the central axis of the pump casing 1, the central axis of the heating device 22, the central axis of the flow guide 3, and the central axis of the impeller 4 are all up and down.
  • the heating chamber 11 is located above the pump chamber 12 and the heating chamber 11 and the pump chamber 12 communicate at the central axis of the pump casing 1, thereby simplifying the structure of the centrifugal pump 100 and reducing the volume, and the centrifugal pump 100 Good hydraulic performance.
  • the outlet 140 may be provided on the outer peripheral wall of the pump casing 1, and the central axis of the outlet 140 is tangent to the outer peripheral wall of the pump casing 1, and the shape of the pump casing 1 surrounding the impeller 4 is designed to be spiral, which is further improved. Hydraulic performance of the centrifugal pump 100.
  • the pump casing 1 may include a casing 14, a casing 211 and an inlet pipe 13, a heating chamber 11 and a pump chamber 12 formed in the casing 14, and an outlet 140 provided on the casing 14, the casing
  • the 211 is detachably mounted on the casing 14 and presses the heating device 22 against the upper end of the casing 14, the inlet pipe 13 is provided on the casing 211 and the inlet 130 is provided on the inlet pipe 13, thereby facilitating the centrifugal pump 100 Disassembly and assembly of various components. For example, as shown in FIGS.
  • the heating device 22 is located at the upper end of the housing 14, and the cover 211 is pressed against the upper surface of the heating device 22, and the heating chamber 11 is located above the pump chamber 12, thereby fluid After being heated by the heating device 22, it flows into the pump chamber 12 under the force of gravity.
  • the cover 211 can be structurally coupled to the housing 14 or can be coupled to the housing 14 by fasteners.
  • a centrifugal pump 100 in accordance with an embodiment of the present invention will be described in detail below with reference to FIGS. 1-9, and it is to be understood that the following description is only illustrative and not a limitation of the invention.
  • a centrifugal pump 100 includes a pump casing 1, a heating device 22, a flow guiding member 3, and an impeller 4.
  • the pump casing 1 includes a casing 14, a casing 211 and an inlet pipe 13, and the heating chamber 11 and the pump chamber 12 are formed in the casing 14, and the heating chamber 11 is located above the pump chamber 12, and the heating chamber 11 and the pump chamber 12 is communicated at the central axis of the housing 14, and the cover body 211 is provided with an inlet tube 13 formed on the inlet tube 13 and the lower end of the inlet tube 13 extending into the heating chamber 11, and the outer peripheral wall of the housing 14 is provided An outlet 140 communicating with the pump chamber 12, the central axis of the outlet 140 is tangential to the outer peripheral wall of the housing 14.
  • the heating device 22 is pressed by the cover 211 to the upper end of the housing 14, and the lower surface of the heating device 22 is the top wall of the heating chamber 11, between the heating device 22 and the housing 14, and the housing 14 and The covers 211 are sealed by a seal ring 5.
  • the flow guide 3 is disposed within the heating chamber 11 and below the heating device 22, and the flow guide 3 includes a partition 31, a plurality of positive spiral vanes 32, and a plurality of counter-helical vanes 33.
  • the partition plate 31 is recessed downward in the radial direction from the outside to the inside, and the outer peripheral edge of the partition plate 31 is located above the center of the partition plate 31, and the partition plate 31 is provided with a plurality of mutually in the circumferential direction.
  • the positioning holes 310 are spaced apart, and a conical guide block 311 is disposed at the center of the upper surface of the partition plate 31, and the apex arc of the flow guiding block 311 is transitioned.
  • a plurality of positive spiral vanes 32 are provided on the upper side of the partition plate 31 and integrally formed with the partition plate 31, and the positive spiral guide vanes 32 are clockwise from the inside to the outside in the radial direction of the partition plate 31. Offset, and a diffusion flow path is defined on the upper side of the partition plate 31.
  • the inner end of the positive spiral guide vane 32 is provided with an engagement groove 320, and the lower end of the inlet pipe 13 is fitted in the engagement groove 320 of the plurality of positive spiral guide vanes 32. . Thereby, the inlet pipe 13 is fitted to the flow guide 3.
  • a plurality of reverse spiral vanes 33 are provided on the lower side of the partition plate 31 and integrally formed with the casing 14
  • the spiral vane 33 is offset counterclockwise from the inside to the outside in the radial direction of the partition plate 31, and defines a concentrated flow passage on the lower side of the partition plate 31, and only one of the adjacent two reverse spiral guide vanes 33 is reverse spiral.
  • a positioning post 331 is disposed on the guide vane 33, and the plurality of positioning posts 331 are respectively fitted in the plurality of positioning holes 310. Thereby, the partition plate 31 is supported on the plurality of reverse spiral vanes 33, so that the flow guide 3 is mounted on the casing 14.
  • the impeller 4 is disposed in the pump chamber 12, and the fluid concentrated to the pump chamber 12 flows under the guidance of the impeller 4 to the outlet 140, and the shape of the casing 14 surrounding the impeller 4 is spiral.
  • the central axis of the inlet 130, the central axis of the housing 14, the central axis of the heating device 22, the central axis of the flow guide 3, and the central axis of the impeller 4 coincide with each other.
  • the centrifugal pump 100 of the embodiment of the present invention by providing the heating device 22 in the heating chamber 11, the impeller 4 is disposed in the pump chamber 12, so that the centrifugal pump 100 has a compact structure and a small volume, thereby improving the space utilization of the centrifugal pump 100. rate.
  • the pump casing 1 surrounding the impeller 4 is designed in a spiral shape, so that the hydraulic performance of the centrifugal pump 100 is good.
  • the fluid can flow through the lower surface of the heating device 22 and is in full contact with the heating device 22, so that the outer diameter of the heating device 22 can be combined with the pump casing 1
  • the outer diameters are matched to increase the heating efficiency of the fluid and reduce the axial dimension of the centrifugal pump 100.
  • centrifugal pump 100 according to another embodiment of the present invention will be described in detail below with reference to FIGS. 2-6 and 10-13. It is to be understood that the following description is merely illustrative and is not to be construed as limiting the present invention. .
  • a centrifugal pump 100 includes a pump casing 1, a heating device 22, a flow guiding member 3, and an impeller 4.
  • the pump casing 1 includes a casing 14, a casing 211 and an inlet pipe 13, and the heating chamber 11 and the pump chamber 12 are formed in the casing 14, and the heating chamber 11 is located above the pump chamber 12, and the heating chamber 11 and the pump chamber 12 is communicated at the central axis of the housing 14, and the cover body 211 is provided with an inlet tube 13 formed on the inlet tube 13 and the lower end of the inlet tube 13 extending into the heating chamber 11, and the outer peripheral wall of the housing 14 is provided An outlet 140 communicating with the pump chamber 12, the central axis of the outlet 140 is tangential to the outer peripheral wall of the housing 14.
  • the heating device 22 is pressed by the cover 211 to the upper end of the housing 14, and the lower surface of the heating device 22 is the top wall of the heating chamber 11, between the heating device 22 and the housing 14, and the housing 14 and The covers 211 are sealed by a seal ring 5.
  • the flow guiding member 3 is an integrally formed member and is disposed in the heating chamber 11 and is located below the heating device 22.
  • the flow guiding member 3 includes a partition 31, a plurality of positive spiral guide vanes 32 and a plurality of reverse spiral guide vanes 33.
  • the partition plate 31 is recessed downward in the radial direction from the outside to the inside, and the outer peripheral edge of the partition plate 31 is located above the center of the partition plate 31, and the partition plate 31 is provided with a plurality of each other in the circumferential direction.
  • the positioning holes 310 are spaced apart, and a conical flow guiding block 311 is disposed at the center of the upper surface of the partition plate 31, and the apex arc of the flow guiding block 311 is transitioned.
  • a plurality of positive spiral vanes 32 are provided on the upper side of the partition 31, and the positive spiral guide vanes 32 are offset clockwise from the inside to the outside in the radial direction of the partition 31, and in the partition
  • the upper side of the 31 defines a diffusion flow path, and the lower end of the inlet pipe 13 fits within the engagement groove 320 of the plurality of positive spiral guide vanes 32. Thereby, the inlet pipe 13 is fitted to the flow guide 3.
  • a plurality of reverse spiral guide vanes 33 are provided on the lower side of the partition plate 31, and the reverse spiral guide vanes 33 are offset counterclockwise from the inside to the outside in the radial direction of the partition plate 31, and are in the partition plate.
  • the lower side of the 31 defines a concentrated flow path, and a plurality of reverse spiral vanes 33 are supported on the housing 14 such that the flow guide 3 is supported on the housing 14.
  • the impeller 4 is disposed within the pump chamber 12, and the fluid concentrated to the pump chamber 12 flows under the guidance of the impeller 4 to the outlet 140, and the shape of the housing 14 surrounding the impeller 4 is helical.
  • the central axis of the inlet 130, the central axis of the housing 14, the central axis of the heating device 22, the central axis of the flow guide 3, and the central axis of the impeller 4 coincide with each other, and the heating chamber 11 and the pump chamber 12 are at the central axis of the housing 14. Connected.
  • the centrifugal pump 100 of the embodiment of the present invention by providing the heating device 22 in the heating chamber 11, the impeller 4 is disposed in the pump chamber 12, so that the centrifugal pump 100 has a compact structure and a small volume, thereby improving the space utilization of the centrifugal pump 100. rate.
  • the pump casing 1 surrounding the impeller 4 is designed in a spiral shape, so that the hydraulic performance of the centrifugal pump 100 is good.
  • the concentrated flow passage defined by the plurality of positive spiral guide vanes 32 and the plurality of reverse spiral guide vanes 33 allows the fluid to flow along a larger turning radius, reducing the bending loss of the fluid.
  • the partition plate 31 is recessed from the outside to the inside in the radial direction, which improves the heating efficiency of the fluid.
  • a pump heater 200 for a centrifugal pump 100 will be described below with reference to Figs. 1-18, which has the advantages of high space utilization, high heating efficiency, and the like, and does not affect the pumping efficiency.
  • the pump heater 200 can be applied to a pumping heating device such as a centrifugal pump.
  • a pump heater 200 includes a housing 21 and a heating device 22.
  • the outer cover 21 is provided with an inlet 130, and the heating device 22 is disposed below the outer cover 21 and avoids the inlet 130.
  • the heating device 22 is disposed around the inlet 130.
  • the inlet 130 communicates with the upper space 201 of the outer cover 21 and the lower space 202 of the heating device 22, and the fluid enters the outer cover 21 from the inlet 130 and flows to the lower space 202 of the heating device 22 to be heated by the heating device 22.
  • the heating device 22 heats the fluid flowing to the lower space 202, thereby not only increasing the heating area of the fluid but also sufficiently Use space. At the same time, since the heating device 22 avoids the inlet 130, the heating device 22 does not generate hydraulic resistance to the fluid, thereby avoiding affecting the pumping efficiency.
  • the pump heater 200 according to the embodiment of the present invention has high space utilization rate, high heating efficiency, and does not affect pumping efficiency.
  • At least one of the upper surface and the outer peripheral surface of the heating device 22 is provided with a resistive coating, that is, at least one of the surfaces of the heating device 22 that is not in contact with the liquid to be heated is provided with a resistance coating Floor.
  • a resistive coating that is, at least one of the surfaces of the heating device 22 that is not in contact with the liquid to be heated is provided with a resistance coating Floor.
  • the upper surface of the heating device 22 is coated with a resistive coating that transfers heat to the lower surface of the heating device 22 and heats the fluid in the lower space 202.
  • the upper surface and the outer peripheral surface of the heating device 22 may each be coated with a resistive coating.
  • the resistive coating can be a thick film resistor.
  • the heating device 22 can be an annular heating plate having a central through hole with the center through hole and the inlet 130
  • the position in the vertical direction corresponds to, for example, the central axis of the central through hole and the central axis of the inlet 130 both extend and coincide in the vertical direction, and the diameter of the central through hole is greater than or equal to the diameter of the inlet 130, so that the heating device 22 does not
  • the fluid at the inlet 130 creates a hydraulic resistance.
  • the heating device 22 may be a circular heating plate, which can further improve space utilization and Heating efficiency.
  • the inner and outer circumferences of the heating device 22 may be sealed from the outer casing 21, respectively, to avoid fluid leakage.
  • the inner and outer peripheral edges of the heating device 22 may be sealed with the outer cover 21 by a seal ring 5, respectively.
  • the inner peripheral edge of the heating device 22 is sealed with the outer cover 21 by the first seal ring 51, and the outer peripheral edge of the heating device 22 is sealed with the outer cover 21 by the second seal ring 52.
  • a heat insulating member 6 may be provided between the inner peripheral edge and/or the outer peripheral edge of the heating device 22 and the corresponding sealing ring 5, so that the sealing ring 5 is prevented from directly contacting the heating device 22, and the heating device 22 can be lightened. The effect of heat on the seal 5.
  • the heat insulating member 6 may be disposed between the inner peripheral edge of the heating device 22 and the corresponding sealing ring 5, or the heat insulating member 6 may be disposed between the outer peripheral edge of the heating device 22 and the corresponding sealing ring 5.
  • the inner circumferential edge of the heating device 22 and the outer circumferential edge and the corresponding sealing ring 5 may each be provided with a heat insulating member 6.
  • the inner periphery of the heating device 22 is welded with a first heat insulating member 61 extending along the circumferential direction of the inner peripheral edge, and the outer peripheral edge of the heating device 22 is welded with a second heat insulating member 62 extending along the circumferential direction of the outer peripheral edge.
  • the first heat insulating member 61 is located between the inner circumference of the heating device 22 and the first sealing ring 51, and the first sealing ring 51 seals the gap between the first heat insulating member 61 and the outer cover 21, and the second heat insulating member 62 is located between the outer peripheral edge of the heating device 22 and the second sealing ring 52, and the second sealing ring 52 seals the gap between the second thermal insulation 62 and the outer cover 21.
  • the pump heater 200 may further include a terminal 7 electrically connected to the heating device 22, according to some embodiments of the present invention. And exposed from the outer cover 21 to energize the heating device 22.
  • the heating device 22 may be provided with a terminal box 8 , and the connection terminal 7 is disposed in the terminal box 8 to protect Terminal block 7 improves power safety.
  • the outer cover 21 may be formed by the cover 211 and the inlet tube 13, and the heating device 22 is disposed on the cover.
  • the inlet pipe 13 is provided on the casing 211, and the inlet 130 is provided on the inlet pipe 13.
  • the fluid flows under the guidance of the inlet pipe 13 to the lower space 202 of the heating device 22, and the hydraulic resistance is small.
  • the pump heater 200 according to the first alternative embodiment of the present invention will be described in detail below with reference to Figs. 14-16. It is to be understood that the following description is only illustrative, and is not to be construed as limiting.
  • a pump heater 200 includes a housing 21, a heating device 22, and a terminal 7.
  • the outer cover 21 includes a cover body 211 and an inlet pipe 13, and the heating device 22 is mounted on the lower surface of the cover body 211.
  • the heating device 22 is provided with a terminal box 8 from which the terminal box 8 is exposed.
  • the terminal block 7 is mounted in the terminal box 8 and electrically connected to the heating device 22.
  • the inlet tube 13 is integrally formed on the cover body 211 and has an inlet. 130, the inlet 130 communicates with the upper space 201 of the cover 211 and the lower space 202 of the heating device 22.
  • the heating device 22 is a circular heating plate having a central through hole and the outer surface is coated with a thick film resistor, and the central through hole corresponds to the inlet 130 in the vertical direction.
  • a first heat insulating member 61 extending along the circumferential direction of the inner peripheral edge is welded along the inner circumference of the heating device 22, and a second heat insulating member 62 extending along the circumferential direction of the outer peripheral edge is welded along the outer circumference of the heating device 22.
  • the cross-sectional shape of the first heat insulating member 61 in the vertical plane is substantially "L" shape, and the first heat insulating member 61 and the cover body 211 are sealed by the first sealing ring 51, and the second heat insulating member 62 is The cross-sectional shape in the vertical plane is substantially "Z" shaped, and the second heat insulating member 62 and the cover body 211 are sealed by the second seal ring 52.
  • the pump heater 200 not only improves the heating of the pump by mounting the heating device 22 under the cover 211 and avoiding the inlet 130, and coating the outer surface of the heating device 22 with a thick film resistor.
  • the space utilization and heating efficiency of the device 200 can also ensure pumping efficiency.
  • the pump heater 200 according to the second alternative embodiment of the present invention will be described in detail below with reference to Figs. 17 and 18. It is to be understood that the following description is merely illustrative and not to be construed as limiting.
  • a pump heater 200 includes a housing 21 and a heating device 22.
  • the outer cover 21 includes a cover body 211 and an inlet pipe 13, and the heating device 22 is mounted on the lower surface of the cover body 211.
  • the inlet pipe 13 is integrally formed on the cover body 211 and has an inlet 130 that communicates with the upper portion of the cover body 211.
  • the space 201 and the lower space 202 of the heating device 22, the lower end of the inlet pipe 13 extends into the lower space 202.
  • the heating device 22 is a circular heating plate having a central through hole and an outer surface coated with a thick film resistor, the central through hole corresponding to the inlet 130 in the vertical direction, the inner circumference of the heating device 22 and the cover body 211 Between the inner circumference of the heating device 22 and the inlet pipe 13 is sealed by the first sealing ring 51, and the outer peripheral edge of the heating device 22 is sealed with the cover body 211 by the second sealing ring 52.
  • centrifugal pump 100 according to an embodiment of the present invention is described in detail below with reference to FIGS. 1-9.
  • the centrifugal pump 100 is suitable for applications such as fluid transportation, cooling systems, household appliances, etc., and has a compact structure, small volume, and heating efficiency. High, good pumping performance and so on. It is to be understood that the following description is only illustrative, and is not to be construed as limiting.
  • a centrifugal pump 100 includes a housing 14, a pump heater 200, a flow guiding member 3, and an impeller 4.
  • the pump heater 200 includes a housing 21, a heating device 22, and a terminal block 7.
  • the housing 21 includes a housing 211 and an inlet tube 13, and the heating device 22 is mounted on the lower surface of the housing 211 and is provided on the heating device 22.
  • the terminal block 7 is mounted in the terminal box 8 and is electrically connected to the heating device 22.
  • the inlet tube 13 is mounted on the cover body 211 and has an inlet 130.
  • the inlet 130 communicates with the cover body.
  • Upper space 201 of 211 and heating device The lower space 202 of 22.
  • the heating device 22 is a circular heating plate having a central through hole and the outer surface is coated with a thick film resistor, and the central through hole corresponds to the inlet 130 in the vertical direction.
  • the housing 14, the cover 211 and the inlet tube 13 together constitute a pump casing 1 of the centrifugal pump 100, the heating chamber 11 and the pump chamber 12 are formed in the housing 14, the heating chamber 11 is located above the pump chamber 12, the heating chamber 11 and the pump The chamber 12 is in communication at a central axis of the housing 14, and the heating chamber 11 and the pump chamber 12 are located below the heating device 22.
  • the heating chamber 11 is in communication with the inlet 130
  • the lower end of the inlet tube 13 extends into the heating chamber 11, and the outer peripheral wall of the housing 14 is provided with an outlet 140 communicating with the pump chamber 12, the central axis of the outlet 140 and the outer circumference of the housing 14.
  • the walls are tangent.
  • the heating device 22 is pressed against the upper end of the casing 14 by the cover 211, and the lower surface of the heating device 22 is the top wall of the heating chamber 11, the inner peripheral edge of the heating device 22 and the outer peripheral surface of the inlet pipe 13. Sealed by the first sealing ring 51, the outer peripheral edge of the heating device 22 is sealed with the housing 14 and between the housing 14 and the housing 211 by the second sealing ring 52.
  • the flow guide 3 is disposed within the heating chamber 11 and below the heating device 22, and the flow guide 3 includes a partition 31, a plurality of positive spiral vanes 32, and a plurality of counter-helical vanes 33.
  • the partition plate 31 is recessed downward in the radial direction from the outside to the inside, and the outer peripheral edge of the partition plate 31 is located above the center of the partition plate 31, and the partition plate 31 is provided with a plurality of mutually in the circumferential direction.
  • the positioning holes 310 are spaced apart, and a conical guide block 311 is disposed at the center of the upper surface of the partition plate 31, and the apex arc of the flow guiding block 311 is transitioned.
  • a plurality of positive spiral vanes 32 are provided on the upper side of the partition plate 31 and integrally formed with the partition plate 31, and the positive spiral guide vanes 32 are clockwise from the inside to the outside in the radial direction of the partition plate 31. Offset, and a diffusion flow path is defined on the upper side of the partition plate 31.
  • the inner end of the positive spiral guide vane 32 is provided with an engagement groove 320, and the lower end of the inlet pipe 13 is fitted in the engagement groove 320 of the plurality of positive spiral guide vanes 32. . Thereby, the inlet pipe 13 is fitted to the flow guide 3.
  • a plurality of reverse spiral guide vanes 33 are provided on the lower side of the partition plate 31 and integrally formed with the casing 14, and the reverse spiral guide vanes 33 are counterclockwise from the inside to the outside in the radial direction of the partition plate 31.
  • the partition plate 31 is supported on the plurality of reverse spiral vanes 33, so that the flow guide 3 is mounted on the casing 14.
  • the impeller 4 is disposed in the pump chamber 12, and the fluid concentrated to the pump chamber 12 flows under the guidance of the impeller 4 to the outlet 140, and the shape of the casing 14 surrounding the impeller 4 is spiral.
  • the central axis of the inlet 130, the central axis of the housing 14, the central axis of the central through hole of the heating device 22, the central axis of the flow guide 3, and the central axis of the impeller 4 coincide with each other.
  • the fluid flows into the heating chamber 11 from the inlet 130 and flows along the diffusion channel. At this time, the flow of the fluid is diffused from the inside to the outside in the radial direction of the heating device 22, and then the fluid diffused through the diffusion channel flows into the concentrated flow channel.
  • the flow of the fluid appears to be concentrated from the outside to the inside in the radial direction of the heating device 22, such that not only the bending resistance of the fluid flow is reduced, the bending loss of the fluid is small, and the fluid is radially outward along the heating device 22. Diffusion, fluid can flow through the heating device 22 The lower surface is in intimate contact with the heating device 22, increasing the heating area of the fluid. Finally, the heated fluid is concentratedly confluent into the pump chamber 12 and directed to the outlet 140 via the impeller 4.
  • the centrifugal pump 100 of the embodiment of the present invention is made compact and small in size by using the pump heater 200 as described above, and the space utilization rate of the centrifugal pump 100 is improved.
  • the heating device 22 is disposed away from the inlet 130 without increasing the hydraulic resistance of the fluid, and the pump casing 1 surrounding the impeller 4 is designed in a spiral shape, so that the pumping performance of the centrifugal pump 100 is good.
  • the fluid can flow through the lower surface of the heating device 22 and is in full contact with the heating device 22, so that the outer diameter of the heating device 22 can be combined with the pump casing 1
  • the outer diameters are matched to increase the heating efficiency of the fluid and reduce the axial dimension of the centrifugal pump 100.
  • centrifugal pump 100 according to another embodiment of the present invention will be described in detail below with reference to FIGS. 2-6 and 10-13. It is to be understood that the following description is merely illustrative and is not to be construed as limiting the present invention. .
  • a centrifugal pump 100 includes a housing 14, a pump heater 200, a flow guide 3, and an impeller 4.
  • the pump heater 200 includes a housing 21, a heating device 22, and a connection terminal.
  • the housing 21 includes a cover body 211 and an inlet tube 13.
  • the heating device 22 is mounted on the lower surface of the cover body 211 and is provided on the heating device 22.
  • the terminal box 8 is exposed from the cover body 211.
  • the terminal block 7 is mounted in the terminal box 8 and electrically connected to the heating device 22.
  • the inlet tube 13 is mounted on the cover body 211 and has an inlet 130.
  • the inlet 130 communicates with the cover body 211.
  • the heating device 22 is a circular heating plate having a central through hole and the outer surface is coated with a thick film resistor, and the central through hole corresponds to the inlet 130 in the vertical direction.
  • the housing 14, the cover 211 and the inlet tube 13 together constitute a pump casing 1 of the centrifugal pump 100, the heating chamber 11 and the pump chamber 12 are formed in the housing 14, the heating chamber 11 is located above the pump chamber 12, the heating chamber 11 and the pump The chamber 12 is in communication at a central axis of the housing 14, and the heating chamber 11 and the pump chamber 12 are located below the heating device 22.
  • the heating chamber 11 is in communication with the inlet 130
  • the lower end of the inlet tube 13 extends into the heating chamber 11, and the outer peripheral wall of the housing 14 is provided with an outlet 140 communicating with the pump chamber 12, the central axis of the outlet 140 and the outer circumference of the housing 14.
  • the walls are tangent.
  • the heating device 22 is pressed against the upper end of the casing 14 by the cover 211, and the lower surface of the heating device 22 is the top wall of the heating chamber 11, the inner peripheral edge of the heating device 22 and the outer peripheral surface of the inlet pipe 13. Sealed by the first sealing ring 51, the outer peripheral edge of the heating device 22 is sealed with the housing 14 and between the housing 14 and the housing 211 by the second sealing ring 52.
  • the flow guiding member 3 is an integrally formed member and is disposed in the heating chamber 11 and is located below the heating device 22.
  • the flow guiding member 3 includes a partition 31, a plurality of positive spiral guide vanes 32 and a plurality of reverse spiral guide vanes 33.
  • the partition plate 31 is recessed downward in the radial direction from the outside to the inside, and the outer peripheral edge of the partition plate 31 is located above the center of the partition plate 31, and the partition plate 31 is provided with a plurality of each other in the circumferential direction.
  • the positioning holes 310 are spaced apart, and a conical flow guiding block 311 is disposed at the center of the upper surface of the partition plate 31, and the apex arc of the flow guiding block 311 is transitioned.
  • a plurality of positive spiral vanes 32 are provided on the upper side of the partition 31, and a positive spiral guide vane 32 is provided along the partition 31.
  • the radial direction is offset clockwise from the inside to the outside, and a diffusion flow path is defined on the upper side of the partition plate 31, and the lower end of the inlet pipe 13 is fitted in the engagement groove 320 of the plurality of positive spiral guide vanes 32. Thereby, the inlet pipe 13 is fitted to the flow guide 3.
  • a plurality of reverse spiral guide vanes 33 are provided on the lower side of the partition plate 31, and the reverse spiral guide vanes 33 are offset counterclockwise from the inside to the outside in the radial direction of the partition plate 31, and are in the partition plate.
  • the lower side of the 31 defines a concentrated flow path, and a plurality of reverse spiral vanes 33 are supported on the housing 14 such that the flow guide 3 is supported on the housing 14.
  • the impeller 4 is disposed within the pump chamber 12, and the fluid concentrated to the pump chamber 12 flows under the guidance of the impeller 4 to the outlet 140, and the shape of the housing 14 surrounding the impeller 4 is helical.
  • the central axis of the inlet 130, the central axis of the housing 14, the central axis of the central through hole of the heating device 22, the central axis of the flow guide 3, and the central axis of the impeller 4 coincide with each other.
  • the centrifugal pump 100 of the embodiment of the present invention is made compact and small in size by using the pump heater 200 as described above, and the space utilization rate of the centrifugal pump 100 is improved.
  • the heating device 22 is disposed away from the inlet 130 without increasing the hydraulic resistance of the fluid, and the pump casing 1 surrounding the impeller 4 is designed in a spiral shape, so that the pumping performance of the centrifugal pump 100 is good.
  • the concentrated flow passage defined by the plurality of positive spiral guide vanes 32 and the plurality of reverse spiral guide vanes 33 allows the fluid to flow along a larger turning radius, reducing the bending loss of the fluid.
  • the partition plate 31 is recessed from the outside to the inside in the radial direction, which improves the heating efficiency of the fluid.
  • connection In the description of the present invention, it should be noted that the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or integrally connected; can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components.
  • Connected, or integrally connected can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components.
  • the specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.

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Abstract

一种离心泵(100)，包括泵壳(1)、加热装置(22)、导流件(3)以及叶轮(4)，泵壳(1)内具有加热腔(11)和与加热腔(11)连通的泵腔(12)，泵壳(1)上设有与加热腔(11)连通的入口(130)和与泵腔(12)连通的出口(140)；加热装置(22)设在泵壳(1)上；导流件(3)设在加热腔(11)内，导流件(3)在加热腔(11)内限定出引导由入口(130)进入的流体沿加热装置(22)的径向向外扩散的扩散流道和引导扩散的流体沿加热装置(22)的径向向内集中至泵腔(12)的集中流道；叶轮(4)设在泵腔(12)内且引导集中至泵腔(12)的流体至出口(140)。该离心泵结构紧凑，体积小，空间利用率高，水力性能好。

Description

离心泵 技术领域
本发明涉及泵送技术领域，尤其是涉及一种离心泵。
背景技术
相关技术中，对于既要对流体加热，又要对所加热的流体进行泵送的情况，通常设置一个加热装置和一个泵送装置，设备的结构复杂，体积庞大，空间利用率低。为此，出现了将加热装置全部或部分埋入泵壳中以使加热装置与泵送装置组合在一起的设备，但由于加热器只能被加工成规则的圆形，导致泵壳不能按照螺旋形状设计，水力性能较差。
发明内容
本发明旨在至少解决现有技术中存在的技术问题之一。为此，本发明需要提供一种离心泵，所述离心泵具有结构简单、水力性能好和加热效率高等优点。
根据本发明实施例的离心泵，包括：泵壳，所述泵壳内具有加热腔和与所述加热腔连通的泵腔，所述泵壳上设有与所述加热腔连通的入口和与所述泵腔连通的出口；加热装置，所述加热装置设在所述泵壳上；导流件，所述导流件设在所述加热腔内，所述导流件在所述加热腔内限定出引导由所述入口进入的流体沿所述加热装置的径向向外扩散的扩散流道和引导扩散的流体沿所述加热装置的径向向内集中至所述泵腔的集中流道；叶轮，所述叶轮设在所述泵腔内且引导集中至所述泵腔的流体至所述出口。
根据本发明实施例的离心泵，离心泵的结构紧凑，体积小，提高了离心泵的空间利用率。同时，加热装置不影响环绕叶轮的泵壳的形状设计，环绕叶轮的泵壳可以设计成螺旋形状，从而离心泵的水力性能好。此外，由入口进入的流体的弯道损失小，且流体可以被加热装置充分加热，从而提高了流体的加热效率。
根据本发明的一些实施例，所述扩散流道引导由所述入口进入的流体沿所述加热装置的径向向外螺旋扩散，所述集中流道引导扩散的流体沿所述加热装置的径向向内螺旋集中至所述泵腔。
根据本发明的一些实施例，所述导流件包括：隔板；多个正螺旋导叶，多个所述正螺旋导叶设在所述隔板的朝向所述加热装置的一侧且在所述隔板的朝向所述加热装置的一侧限定出所述扩散流道；多个反螺旋导叶，多个所述反螺旋导叶设在所述隔板的朝向所述泵腔的一侧且在所述隔板的朝向所述泵腔的一侧限定出所述集中流道。
在本发明的进一步实施例中，所述正螺旋导叶和所述反螺旋导叶中的一种沿所述隔板的径向由内至外顺时针偏移且另一种沿所述隔板的径向由内至外逆时针偏移。
在本发明的一些实施例中，多个所述反螺旋导叶连接在所述加热腔的底壁上，多个所述正螺旋导叶连接在所述隔板上且所述隔板支撑在多个所述反螺旋导叶上。
可选地，多个所述反螺旋导叶一体形成在所述泵壳上，多个所述正螺旋导叶一体形成在所述隔板上。
可选地，所述隔板上设有定位孔且所述反螺旋导叶上设有定位柱，所述定位柱配合在所述定位孔内。
优选地，所述定位柱为多个且分别设在对应的所述反螺旋导叶的内端，所述定位孔为多个且沿所述隔板的周向间隔设置，多个所述定位柱分别配合在多个所述定位孔内。
在本发明的另一些实施例中，多个所述反螺旋导叶和多个所述正螺旋导叶连接在所述隔板上且多个所述反螺旋导叶支撑在所述加热腔的底壁上。
进一步地，多个所述反螺旋导叶、多个所述正螺旋导叶和所述隔板一体形成。
在本发明的具体实施例中，所述泵壳上具有伸入所述加热腔的入口管且所述入口设在所述入口管上，所述正螺旋导叶的内端设有契合槽，所述入口管的伸入所述加热腔的一端配合在多个所述正螺旋导叶的契合槽内。
在本发明的可选实施例中，所述隔板的朝向所述加热装置的侧表面的中心处设有引导由所述入口进入的流体至多个所述正螺旋导叶的导流块。
进一步地，所述导流块为圆锥形且顶点圆弧过渡。
在本发明的一些实施例中，所述隔板的外周沿相对于所述泵腔更加邻近所述加热装置且所述隔板的中心处相对于所述加热装置更加邻近所述泵腔。
根据本发明的一些实施例，所述入口的中心轴线、所述泵壳的中心轴线、所述加热装置的中心轴线、所述导流件的中心轴线和所述叶轮的中心轴线相互重合，所述加热腔和所述泵腔在所述泵壳的中心轴线处连通，所述出口设在所述泵壳的外周壁上且中心轴线与所述泵壳的外周壁相切。
根据本发明的一些实施例，所述泵壳包括：壳体，所述加热腔和所述泵腔形成在所述壳体内，所述出口设在所述壳体上；罩体，所述罩体可拆卸地安装在所述壳体上且将所述加热装置压紧在所述壳体的上端；入口管，所述入口管设在所述罩体上，所述入口设在所述入口管上。
根据本发明的一些实施例，所述加热装置为具有中心通孔的圆环形加热板，所述中心通孔与所述入口在竖直方向上位置对应。
根据本发明的一些实施例，所述加热装置的上表面和外周面中的至少一个上设有电阻涂 层。
根据本发明的一些实施例，所述加热装置的内周沿和外周沿分别与所述泵壳之间通过密封圈密封，且所述加热装置的内周沿和/或外周沿与对应的所述密封圈之间设有隔热件。
根据本发明的一些实施例，所述离心泵还包括：端子盒，所述端子盒设在所述加热装置上；接线端子，所述接线端子设在所述端子盒内且与所述加热装置电连接，所述接线端子从从所述泵壳露出。
本发明的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本发明的实践了解到。
附图说明
图1是根据本发明实施例的离心泵的爆炸图；
图2是根据本发明实施例的离心泵的立体图；
图3是根据本发明实施例的离心泵的主视图；
图4是沿图3中A-A线的剖视图；
图5是根据本发明实施例的离心泵的左视图；
图6是根据本发明实施例的离心泵的俯视图；
图7是根据本发明实施例的离心泵的导流件的隔板和正螺旋导叶的立体图；
图8是根据本发明实施例的离心泵的导流件的隔板和正螺旋导叶的主视图；
图9是根据本发明实施例的离心泵的导流件的隔板和正螺旋导叶的俯视图；
图10是根据本发明另一个实施例的离心泵的爆炸图；
图11是根据本发明另一个实施例的离心泵的导流件的立体图；
图12是根据本发明另一个实施例的离心泵的导流件的主视图；
图13是根据本发明另一个实施例的离心泵的导流件的俯视图；
图14是根据本发明第一可选实施例的泵用加热器的剖视图；
图15是根据本发明第一可选实施例的泵用加热器的外罩的立体图；
图16是根据本发明第一可选实施例的泵用加热器的加热板处的立体图；
图17是根据本发明第二可选实施例的泵用加热器的立体图；
图18是根据本发明第二可选实施例的泵用加热器的剖视图。
附图标记：
离心泵100，
泵壳1，加热腔11，泵腔12，入口管13，入口130，壳体14，出口140，
泵用加热器200，外罩21，罩体211，加热装置22，上部空间201，下部空间202，
导流件3，隔板31，定位孔310，导流块311，正螺旋导叶32，契合槽320，反螺旋导叶33，定位柱331，
叶轮4，
密封圈5，第一密封圈51，第二密封圈52，隔热件6，第一隔热件61，第二隔热件62，接线端子7，端子盒8。
具体实施方式
下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本发明，而不能理解为对本发明的限制。
下面参考图1-图13描述根据本发明实施例的离心泵100，所述离心泵100适用于流体输送、冷却系统、家用电器等应用场合，具有结构紧凑、体积小、水力性能好等优点。
如图1-图13所示，根据本发明实施例的离心泵100，包括泵壳1、加热装置22、导流件3以及叶轮4。
具体而言，泵壳1内具有加热腔11和与加热腔11连通的泵腔12，泵壳1上设有与加热腔11连通的入口130和与泵腔12连通的出口140。加热装置22设在泵壳1上且至少一部分位于加热腔11内，例如，加热装置22的下表面形成为加热腔11的顶壁，如此加热腔11内的流体能够被加热装置22加热。优选地，加热装置22为圆环形且采用厚膜电阻加热，从而加热效率高。导流件3设在加热腔11内，其中导流件3在加热腔11内限定出扩散流道和集中流道，扩散流道引导由入口130进入的流体沿加热装置22的径向向外螺旋扩散，集中流道引导扩散的流体沿加热装置22的径向向内螺旋集中至泵腔12。叶轮4设在泵腔12内，叶轮4引导集中至泵腔12的流体至出口140。
下面参考附图描述根据本发明实施例的离心泵100的加热泵送过程。
流体由入口130进入加热腔11后沿着扩散流道流动，此时流体的流动呈现沿加热装置22的径向由内向外扩散，之后，经扩散流道扩散后的流体流入集中流道，此时流体的流动呈现沿加热装置22的径向由外向内集中，这样，不仅减小了流体流动的弯道阻力，流体的弯道损失小，而且，使得流体沿加热装置22的径向向外扩散，流体可以流过加热装置22的下表面并与加热装置22充分接触，增大了流体的加热面积，最后，被加热的流体集中汇流到泵腔12内，经叶轮4的引导再流至出口140。
根据本发明实施例的离心泵100，通过将加热装置22设在加热腔11内，叶轮4设在泵腔12内，从而集成有加热和泵送功能，且离心泵100的结构紧凑，体积小，提高了离心泵100的空间利用率。同时，导流件3使得加热装置22不影响环绕叶轮4的泵壳1的形状设 计，环绕叶轮4的泵壳1可以设计成螺旋形状，从而离心泵100的水力性能好。此外，利用导流件3使得流体的弯道损失小，且流体可以被加热装置22充分加热，从而提高了流体的加热效率。
在图1和图4所示的实施例中，扩散流道可以引导由入口进入的流体沿加热装置22的径向向外螺旋扩散，集中流道可以引导扩散的流体沿加热装置22的径向向内螺旋集中至泵腔12。换言之，扩散流道可以形成为螺旋扩散流道，集中流道可以形成为螺旋集中流道，如此能够进一步减小流体的弯道损失，且使得流体能够更加充分地流过加热装置22的下表面，从而进一步提高离心泵100的加热效率。
如图1和图10-图12所示，根据本发明的一些实施例，导流件3可以包括隔板31、多个正螺旋导叶32和多个反螺旋导叶33。其中多个正螺旋导叶32设在隔板31的朝向加热装置22的一侧(如附图中所示的隔板31的上侧)，多个正螺旋导叶32在隔板31的上侧限定出扩散流道，多个反螺旋导叶33设在隔板31的朝向泵腔12的一侧(如附图中所示的隔板31的下侧)，多个反螺旋导叶33在隔板31的下侧限定出集中流道，这样由入口130进入的流体在扩散流道的引导下沿加热装置22的径向由内向外螺旋扩散，扩散的流体再分别流入集中流道，从而可以进一步提高流体的加热效率。
在本发明的进一步实施例中，正螺旋导叶32和反螺旋导叶33中的一种可以沿隔板31的径向由内至外顺时针偏移且另一种沿隔板31的径向由内至外逆时针偏移，从而流体可以在扩散流道的引导下由内向外螺旋扩散，在集中流道的引导下由外向内螺旋集中，且扩散的流体在扩散流道和集中流道的交接处的弯道损失小。例如，如图1所示，正螺旋导叶32可以沿隔板31的径向由内至外顺时针偏移，反螺旋导叶33沿隔板31的径向由内至外逆时针偏移。当然，还可以是正螺旋导叶32沿隔板31的径向由内至外逆时针偏移，反螺旋导叶33沿隔板31的径向由内至外顺时针偏移。
如图1、图4、图7和图9所示，在本发明的一些实施例中，多个反螺旋导叶33可以连接在加热腔11的底壁上，多个正螺旋导叶32可以连接在隔板31上，隔板31支撑在多个反螺旋导叶33上，即导流件3为分体结构，由此，可以实现导流件3在加热腔11内的安装定位。
可选地，如图1所示，多个反螺旋导叶33可以一体形成在泵壳1上，多个正螺旋导叶32一体形成在隔板31上，从而可以进一步简化离心泵100的结构，缩减导流件3的装配工序。
可选地，如图1和图7-图9所示，隔板31上可以设有定位孔310，反螺旋导叶33上设有定位柱331，定位柱331配合在定位孔310内，从而隔板31可以牢靠地支撑在反螺旋导叶33上。例如，如附图所示，定位柱331可以形成为大体长方体，定位孔310形成为大体 矩形孔，从而加工方便。当然，定位柱331还可以是长圆柱，定位孔310形成为圆孔，对此不做特殊限定，只要定位柱331可以与定位孔310配合在一起即可。
作为优选，定位柱331可以为多个，定位孔310为多个，多个定位柱331分别设在对应的反螺旋导叶33的内端，多个定位孔310沿隔板31的周向间隔设置，多个定位柱331分别配合在多个定位孔310内，从而隔板31与反螺旋导叶33之间的连接更加牢靠。例如，如图1所示，相邻的两个反螺旋导叶33中仅一个反螺旋导叶33上设有定位柱331，即相邻的两个定位柱331之间间隔一个不设有定位柱331的反螺旋导叶33，多个定位孔310分别与多个定位柱331对应地间隔分布在隔板31的周向上，这样可以方便隔板31与反螺旋导叶33的连接。
在如图10-图13所示的另一些实施例中，多个反螺旋导叶33和多个正螺旋导叶32连接在隔板31上，多个反螺旋导叶33支撑在加热腔11的底壁上，即导流件3为整体件，由此便于导流件3的装配。优选地，如图11所示，多个反螺旋导叶33、多个正螺旋导叶32和隔板31可以一体形成，从而简化了导流件3的生产工序，有利于提高离心泵100的装配效率。
如图1-图6所示，在本发明的具体实施例中，泵壳1具有入口管13，入口130设在入口管13上，入口管13的下端伸入加热腔11，正螺旋导叶32的内端设有契合槽320，入口管13的下端配合在多个正螺旋导叶32的契合槽320内。例如，如图7所示，契合槽320可以贯通正螺旋导叶32的内端面，这样入口管13可以稳固地配合在多个正螺旋导叶32的契合槽320内。
在如图1、图4、图7和图10-图11所示的可选实施例中，隔板31的朝向加热装置22的侧表面(如附图中所示的隔板31的上表面)的中心处可以设有导流块311，这样由入口130进入的流体可以经过导流块311的引导流动至多个正螺旋导叶32。优选地，导流块311可以为圆锥形，导流块311的顶点圆弧过渡，这样流体落在导流块311的顶点上时可以向导流块311的四周分散，从而流体可以顺利地流入扩散流道。
在本发明的一些实施例中，隔板31的外周沿相对于泵腔12更加邻近加热装置22，隔板31的中心处相对于加热装置22更加邻近泵腔12，即隔板31呈漏斗状。例如，如图4、图8和图12所示，隔板31沿径向由外向内向下凹陷，隔板31的外周沿位于隔板31的中心处的上方，隔板31的纵截面形成为大体的锥形面，从而流体可以被加热装置22充分加热，进一步提高了流体的加热效率。当然可以理解的是，隔板31还可以沿水平方向延伸，从而隔板31的结构简单，生产加工方便。
如图4所示，根据本发明的一些实施例，入口130的中心轴线、泵壳1的中心轴线、加热装置22的中心轴线、导流件3的中心轴线和叶轮4的中心轴线均沿上下方向定向且相互 重合，加热腔11位于泵腔12的上方且加热腔11和泵腔12在泵壳1的中心轴线处连通，由此简化了离心泵100的结构，并减小了体积，且离心泵100的水力性能好。参照图6，出口140可以设在泵壳1的外周壁上，出口140的中心轴线与泵壳1的外周壁相切，此时环绕叶轮4的泵壳1的形状设计成螺旋形，进一步提高离心泵100的水力性能。
根据本发明的一些实施例，泵壳1可以包括壳体14、罩体211和入口管13，加热腔11和泵腔12形成在壳体14内，出口140设在壳体14上，罩体211可拆卸地安装在壳体14上且将加热装置22压紧在壳体14的上端，入口管13设在罩体211上且入口130设在入口管13上，由此便于离心泵100的各部件的拆装。例如，如图1-图4和图10所示，加热装置22位于壳体14的上端，罩体211压紧在加热装置22的上表面上，加热腔11位于泵腔12的上方，从而流体经过加热装置22的加热后在重力作用下流入泵腔12。可以理解的是，罩体211可以与壳体14采用结构配合，也可以与壳体14通过紧固件连接。
下面参考图1-图9详细描述根据本发明的一个具体实施例的离心泵100，值得理解的是，下述描述只是示例性说明，而不能理解为对本发明的限制。
如图1-图9所示，根据本发明实施例的离心泵100，包括泵壳1、加热装置22、导流件3以及叶轮4。
具体而言，泵壳1包括壳体14、罩体211和入口管13，加热腔11和泵腔12形成在壳体14内，加热腔11位于泵腔12的上方，加热腔11和泵腔12在壳体14的中心轴线处连通，罩体211上设有入口管13，入口130形成在入口管13上且入口管13的下端伸入加热腔11，壳体14的外周壁上设有与泵腔12连通的出口140，出口140的中心轴线与壳体14的外周壁相切。
如图4所示，加热装置22被罩体211压紧在壳体14的上端，且加热装置22的下表面为加热腔11的顶壁，加热装置22与壳体14之间以及壳体14和罩体211之间通过密封圈5密封。导流件3设在加热腔11内且位于加热装置22的下方，导流件3包括隔板31、多个正螺旋导叶32和多个反螺旋导叶33。其中，如图4和图8所示，隔板31沿径向由外向内向下凹陷，隔板31的外周沿位于隔板31的中心处的上方，隔板31的周向上设有多个彼此间隔分布的定位孔310，隔板31的上表面中心处设有圆锥形的导流块311，导流块311的顶点圆弧过渡。
如图4和图7所示，多个正螺旋导叶32设在隔板31的上侧且与隔板31一体成型，正螺旋导叶32沿隔板31的径向由内至外顺时针偏移，且在隔板31的上侧限定出扩散流道，正螺旋导叶32的内端设有契合槽320，入口管13的下端配合在多个正螺旋导叶32的契合槽320内。由此，入口管13配合在导流件3上。
如图1和图4所示，多个反螺旋导叶33设在隔板31的下侧且与壳体14一体成型，反 螺旋导叶33沿隔板31的径向由内至外逆时针偏移，且在隔板31的下侧限定出集中流道，相邻的上述两个反螺旋导叶33中仅一个反螺旋导叶33上设有定位柱331，多个定位柱331分别配合在多个定位孔310内。由此，隔板31支撑在多个反螺旋导叶33上，从而导流件3安装在壳体14上。
如图4所示，叶轮4设在泵腔12内，集中至泵腔12的流体在叶轮4的引导下流动至出口140，环绕叶轮4的壳体14的形状为螺旋形。入口130的中心轴线、壳体14的中心轴线、加热装置22的中心轴线、导流件3的中心轴线和叶轮4的中心轴线相互重合。
根据本发明实施例的离心泵100，通过将加热装置22设在加热腔11内，叶轮4设在泵腔12内，使得离心泵100的结构紧凑，体积小，提高了离心泵100的空间利用率。同时，环绕叶轮4的泵壳1设计成螺旋形状，从而离心泵100的水力性能好。此外，利用导流件3，不仅减小了流体的弯道损失，而且，流体可以流过加热装置22的下表面并与加热装置22充分接触，使得加热装置22的外径可以与泵壳1的外径相匹配，从而提高了流体的加热效率，减小了离心泵100的轴向尺寸。
下面参照图2-图6和图10-图13详细描述根据本发明的另一个具体实施例的离心泵100，值得理解的是，下述描述只是示例性说明，而不能理解为对本发明的限制。
如图2-图6和图10-图13所示，根据本发明实施例的离心泵100，包括泵壳1、加热装置22、导流件3以及叶轮4。
具体而言，泵壳1包括壳体14、罩体211和入口管13，加热腔11和泵腔12形成在壳体14内，加热腔11位于泵腔12的上方，加热腔11和泵腔12在壳体14的中心轴线处连通，罩体211上设有入口管13，入口130形成在入口管13上且入口管13的下端伸入加热腔11，壳体14的外周壁上设有与泵腔12连通的出口140，出口140的中心轴线与壳体14的外周壁相切。
如图4所示，加热装置22被罩体211压紧在壳体14的上端，且加热装置22的下表面为加热腔11的顶壁，加热装置22与壳体14之间以及壳体14和罩体211之间通过密封圈5密封。导流件3为一体成型件且设在加热腔11内，并位于加热装置22的下方，导流件3包括隔板31、多个正螺旋导叶32和多个反螺旋导叶33。其中，如图4和图12所示，隔板31沿径向由外向内向下凹陷，隔板31的外周沿位于隔板31的中心处的上方，隔板31的周向上设有多个彼此间隔分布的定位孔310，隔板31的上表面的中心处设有圆锥形的导流块311，导流块311的顶点圆弧过渡。
如图4和图11所示，多个正螺旋导叶32设在隔板31的上侧，正螺旋导叶32沿隔板31的径向由内至外顺时针偏移，且在隔板31的上侧限定出扩散流道，入口管13的下端配合在多个正螺旋导叶32的契合槽320内。由此，入口管13配合在导流件3上。
如图10和图12所示，多个反螺旋导叶33设在隔板31的下侧，反螺旋导叶33沿隔板31的径向由内至外逆时针偏移，且在隔板31的下侧限定出集中流道，多个反螺旋导叶33支撑在壳体14上，从而导流件3支撑在壳体14上。
如图4-图6所示，叶轮4设在泵腔12内，集中至泵腔12的流体在叶轮4的引导下流动至出口140，环绕叶轮4的壳体14的形状为螺旋形。入口130的中心轴线、壳体14的中心轴线、加热装置22的中心轴线、导流件3的中心轴线和叶轮4的中心轴线相互重合，加热腔11和泵腔12在壳体14的中心轴线处连通。
根据本发明实施例的离心泵100，通过将加热装置22设在加热腔11内，叶轮4设在泵腔12内，使得离心泵100的结构紧凑，体积小，提高了离心泵100的空间利用率。同时，环绕叶轮4的泵壳1设计成螺旋形状，从而离心泵100的水力性能好。此外，利用多个正螺旋导叶32限定出的扩散流道和多个反螺旋导叶33限定出的集中流道，使得流体沿较大的转弯半径流动，减小了流体的弯道损失，且隔板31沿径向由外向内向下凹陷，提高了流体的加热效率。
下面参考图1-图18描述根据本发明实施例离心泵100的泵用加热器200，所述泵用加热器200具有空间利用率高、加热效率高等优点，并且不会影响泵送效率。其中，泵用加热器200可以应用于离心泵等泵送加热装置。
如图1-图18所示，根据本发明实施例的泵用加热器200，包括外罩21和加热装置22。
外罩21上设有入口130，加热装置22设在外罩21的下方且避让入口130，例如，加热装置22围绕入口130设置。入口130连通外罩21的上部空间201和加热装置22的下部空间202，流体从入口130进入外罩21内，并流至加热装置22的下部空间202被加热装置22加热。
根据本发明实施例的泵用加热器200，通过将加热装置22设在外罩21的下方，利用加热装置22加热流至其下部空间202的流体，不仅增大了流体的加热面积，而且能够充分利用空间。同时，由于加热装置22避开入口130，加热装置22不会对流体产生水力阻力，避免影响泵送效率。
综上所述，根据本发明实施例的泵用加热器200，空间利用率高、加热效率高，且不影响泵送效率。
根据本发明的一些实施例，加热装置22的上表面和外周面中的至少一个上设有电阻涂层，即加热装置22的与待加热液体不接触的表面中的至少一个上设有电阻涂层。例如，加热装置22的上表面上涂覆电阻涂层，热量传递到加热装置22的下表面并对下部空间202的流体加热。当然，加热装置22的上表面和外周面上可以均涂覆电阻涂层。优选地，电阻涂层可以为厚膜电阻。
如图1、图4、图10、图14、图16和图18所示，根据本发明的一些实施例，加热装置22可以为具有中心通孔的环形加热板，中心通孔与入口130在竖直方向上位置对应，例如，中心通孔的中心轴线与入口130的中心轴线均沿竖直方向延伸且重合，中心通孔的直径大于或等于入口130的直径，如此加热装置22不会对入口130处的流体产生水力阻力。
可选地，如图1、图2、图4、图6、图10、图14、图16-图18所示，加热装置22可以为圆环形加热板，如此能够进一步提高空间利用率和加热效率。
在图14和图18所示的一些实施例中，加热装置22的内周沿和外周沿可以分别与外罩21之间密封，以避免流体泄漏。具体地，加热装置22的内周沿和外周沿可以分别与外罩21之间通过密封圈5密封。例如，加热装置22的内周沿与外罩21之间通过第一密封圈51密封，加热装置22的外周沿与外罩21之间通过第二密封圈52密封。
优选地，加热装置22的内周沿和/或外周沿与对应的密封圈5之间可以设有隔热件6，这样避免了密封圈5直接接触加热装置22，能够减轻加热装置22产生的热量对密封圈5的影响。其中，隔热件6可以设在加热装置22的内周沿与对应的密封圈5之间，或者隔热件6可以设在加热装置22的外周沿与对应的密封圈5之间。当然，加热装置22的内周沿和外周沿与对应的密封圈5之间可以均设有隔热件6。例如，加热装置22的内周沿上焊接沿内周沿的周向延伸的第一隔热件61，且加热装置22的外周沿上焊接沿外周沿的周向延伸的第二隔热件62，第一隔热件61位于加热装置22的内周沿和第一密封圈51之间，且第一密封圈51密封第一隔热件61和外罩21之间的间隙，第二隔热件62位于加热装置22的外周沿和第二密封圈52之间，且第二密封圈52密封第二隔热件62和外罩21之间的间隙。
如图1、图2、图6、图10和图14-图16所示，根据本发明的一些实施例，泵用加热器200还可以包括接线端子7，接线端子7与加热装置22电连接且从外罩21露出，以便向加热装置22通电。进一步地，如图1-图3、图5、图6、图10和图14-图16所示，加热装置22上可以设有端子盒8，接线端子7设在端子盒8内，以保护接线端子7，提高用电安全性。
在图1-图6、图10、图14、图15、图17和图18所示的一些实施例中，外罩21可以由罩体211和入口管13共同构成，加热装置22设在罩体211的下方，入口管13设在罩体211上，入口130设在入口管13上。这样，流体在入口管13的引导下流动至加热装置22的下部空间202，水力阻力小。
下面参照图14-图16详细描述根据本发明的第一可选实施例的泵用加热器200，值得理解的是，下述描述只是示例性说明，而不能理解为对本发明的限制。
如图14-图16所示，根据本发明实施例的泵用加热器200，包括外罩21、加热装置22和接线端子7。
具体地，外罩21包括罩体211和入口管13，加热装置22安装在罩体211的下表面上 且加热装置22上设有端子盒8，端子盒8从罩体211露出，接线端子7安装在端子盒8内且与加热装置22电连接，入口管13一体成型在罩体211上且具有入口130，入口130连通罩体211的上部空间201和加热装置22的下部空间202。其中，加热装置22为具有中心通孔且外表面涂覆厚膜电阻的圆环形加热板，中心通孔与入口130在竖直方向上位置对应。
加热装置22的内周沿上焊接沿内周沿的周向延伸的第一隔热件61，且加热装置22的外周沿上焊接沿外周沿的周向延伸的第二隔热件62。其中，第一隔热件61在竖直平面内的截面形状大体为“L”形，第一隔热件61与罩体211之间通过第一密封圈51密封，第二隔热件62在竖直平面内的截面形状大体为“Z”形，第二隔热件62与罩体211之间通过第二密封圈52密封。
根据本发明实施例的泵用加热器200，通过将加热装置22安装在罩体211的下方且避让入口130，并在加热装置22的外表面涂覆厚膜电阻，从而不仅提高了泵用加热器200的空间利用率和加热效率，而且能够保证泵送效率。
下面参照图17和图18详细描述根据本发明的第二可选实施例的泵用加热器200，值得理解的是，下述描述只是示例性说明，而不能理解为对本发明的限制。
如图17、图18所示，根据本发明实施例的泵用加热器200，包括外罩21和加热装置22。
具体地，外罩21包括罩体211和入口管13，加热装置22安装在罩体211的下表面上，入口管13一体成型在罩体211上且具有入口130，入口130连通罩体211的上部空间201和加热装置22的下部空间202，入口管13的下端伸入下部空间202。其中，加热装置22为具有中心通孔且外表面涂覆厚膜电阻的圆环形加热板，中心通孔与入口130在竖直方向上位置对应，加热装置22的内周沿与罩体211之间以及加热装置22的内周沿与入口管13之间均通过第一密封圈51密封，加热装置22的外周沿与罩体211之间通过第二密封圈52密封。
下面参考图1-图9详细描述根据本发明的一个具体实施例的离心泵100，所述离心泵100适用于流体输送、冷却系统、家用电器等应用场合，具有结构紧凑、体积小、加热效率高、泵送性能好等优点。值得理解的是，下述描述只是示例性说明，而不能理解为对本发明的限制。
如图1-图9所示，根据本发明实施例的离心泵100，包括壳体14、泵用加热器200、导流件3以及叶轮4。
具体而言，泵用加热器200包括外罩21、加热装置22和接线端子7，外罩21包括罩体211和入口管13，加热装置22安装在罩体211的下表面上且加热装置22上设有端子盒8，端子盒8从罩体211露出，接线端子7安装在端子盒8内且与加热装置22电连接，入口管13安装在罩体211上且具有入口130，入口130连通罩体211的上部空间201和加热装置 22的下部空间202。其中，加热装置22为具有中心通孔且外表面涂覆厚膜电阻的圆环形加热板，中心通孔与入口130在竖直方向上位置对应。
壳体14、罩体211和入口管13共同构成离心泵100的泵壳1，加热腔11和泵腔12形成在壳体14内，加热腔11位于泵腔12的上方，加热腔11和泵腔12在壳体14的中心轴线处连通，加热腔11和泵腔12位于加热装置22的下方。其中，加热腔11与入口130连通，入口管13的下端伸入加热腔11，壳体14的外周壁上设有与泵腔12连通的出口140，出口140的中心轴线与壳体14的外周壁相切。
如图4所示，加热装置22被罩体211压紧在壳体14的上端，且加热装置22的下表面为加热腔11的顶壁，加热装置22的内周沿与入口管13的外周面之间通过第一密封圈51密封，加热装置22的外周沿与壳体14之间以及壳体14和罩体211之间通过第二密封圈52密封。导流件3设在加热腔11内且位于加热装置22的下方，导流件3包括隔板31、多个正螺旋导叶32和多个反螺旋导叶33。其中，如图4和图8所示，隔板31沿径向由外向内向下凹陷，隔板31的外周沿位于隔板31的中心处的上方，隔板31的周向上设有多个彼此间隔分布的定位孔310，隔板31的上表面中心处设有圆锥形的导流块311，导流块311的顶点圆弧过渡。
如图4和图7所示，多个正螺旋导叶32设在隔板31的上侧且与隔板31一体成型，正螺旋导叶32沿隔板31的径向由内至外顺时针偏移，且在隔板31的上侧限定出扩散流道，正螺旋导叶32的内端设有契合槽320，入口管13的下端配合在多个正螺旋导叶32的契合槽320内。由此，入口管13配合在导流件3上。
如图1和图4所示，多个反螺旋导叶33设在隔板31的下侧且与壳体14一体成型，反螺旋导叶33沿隔板31的径向由内至外逆时针偏移，且在隔板31的下侧限定出集中流道，相邻的上述两个反螺旋导叶33中仅一个反螺旋导叶33上设有定位柱331，多个定位柱331分别配合在多个定位孔310内。由此，隔板31支撑在多个反螺旋导叶33上，从而导流件3安装在壳体14上。
如图4所示，叶轮4设在泵腔12内，集中至泵腔12的流体在叶轮4的引导下流动至出口140，环绕叶轮4的壳体14的形状为螺旋形。入口130的中心轴线、壳体14的中心轴线、加热装置22的中心通孔的中心轴线、导流件3的中心轴线和叶轮4的中心轴线相互重合。
下面参考附图描述根据本发明实施例的离心泵100的加热泵送过程。
流体由入口130进入加热腔11后沿着扩散流道流动，此时流体的流动呈现沿加热装置22的径向由内向外扩散，之后，经扩散流道扩散后的流体流入集中流道，此时流体的流动呈现沿加热装置22的径向由外向内集中，这样，不仅减小了流体流动的弯道阻力，流体的弯道损失小，而且，使得流体沿加热装置22的径向向外扩散，流体可以流过加热装置22的 下表面并与加热装置22充分接触，增大了流体的加热面积，最后，被加热的流体集中汇流到泵腔12内，经叶轮4的引导再流至出口140。
根据本发明实施例的离心泵100，利用如上所述的泵用加热器200，使得离心泵100的结构紧凑，体积小，提高了离心泵100的空间利用率。同时，加热装置22避开入口130设置，不会增加流体的水力阻力，且环绕叶轮4的泵壳1设计成螺旋形状，从而离心泵100的泵送性能好。此外，利用导流件3，不仅减小了流体的弯道损失，而且，流体可以流过加热装置22的下表面并与加热装置22充分接触，使得加热装置22的外径可以与泵壳1的外径相匹配，从而提高了流体的加热效率，减小了离心泵100的轴向尺寸。
下面参照图2-图6和图10-图13详细描述根据本发明的另一个具体实施例的离心泵100，值得理解的是，下述描述只是示例性说明，而不能理解为对本发明的限制。
如图2-图6和图10-图13所示，根据本发明实施例的离心泵100，包括壳体14、泵用加热器200、导流件3以及叶轮4。
具体而言，泵用加热器200包括外罩21、加热装置22和接线端子，外罩21包括罩体211和入口管13，加热装置22安装在罩体211的下表面上且加热装置22上设有端子盒8，端子盒8从罩体211露出，接线端子7安装在端子盒8内且与加热装置22电连接，入口管13安装在罩体211上且具有入口130，入口130连通罩体211的上部空间201和加热装置22的下部空间202。其中，加热装置22为具有中心通孔且外表面涂覆厚膜电阻的圆环形加热板，中心通孔与入口130在竖直方向上位置对应。
壳体14、罩体211和入口管13共同构成离心泵100的泵壳1，加热腔11和泵腔12形成在壳体14内，加热腔11位于泵腔12的上方，加热腔11和泵腔12在壳体14的中心轴线处连通，加热腔11和泵腔12位于加热装置22的下方。其中，加热腔11与入口130连通，入口管13的下端伸入加热腔11，壳体14的外周壁上设有与泵腔12连通的出口140，出口140的中心轴线与壳体14的外周壁相切。
如图4所示，加热装置22被罩体211压紧在壳体14的上端，且加热装置22的下表面为加热腔11的顶壁，加热装置22的内周沿与入口管13的外周面之间通过第一密封圈51密封，加热装置22的外周沿与壳体14之间以及壳体14和罩体211之间通过第二密封圈52密封。导流件3为一体成型件且设在加热腔11内，并位于加热装置22的下方，导流件3包括隔板31、多个正螺旋导叶32和多个反螺旋导叶33。其中，如图4和图12所示，隔板31沿径向由外向内向下凹陷，隔板31的外周沿位于隔板31的中心处的上方，隔板31的周向上设有多个彼此间隔分布的定位孔310，隔板31的上表面的中心处设有圆锥形的导流块311，导流块311的顶点圆弧过渡。
如图4和图11所示，多个正螺旋导叶32设在隔板31的上侧，正螺旋导叶32沿隔板31 的径向由内至外顺时针偏移，且在隔板31的上侧限定出扩散流道，入口管13的下端配合在多个正螺旋导叶32的契合槽320内。由此，入口管13配合在导流件3上。
如图10和图12所示，多个反螺旋导叶33设在隔板31的下侧，反螺旋导叶33沿隔板31的径向由内至外逆时针偏移，且在隔板31的下侧限定出集中流道，多个反螺旋导叶33支撑在壳体14上，从而导流件3支撑在壳体14上。
如图4-图6所示，叶轮4设在泵腔12内，集中至泵腔12的流体在叶轮4的引导下流动至出口140，环绕叶轮4的壳体14的形状为螺旋形。入口130的中心轴线、壳体14的中心轴线、加热装置22的中心通孔的中心轴线、导流件3的中心轴线和叶轮4的中心轴线相互重合。
根据本发明实施例的离心泵100，利用如上所述的泵用加热器200，使得离心泵100的结构紧凑，体积小，提高了离心泵100的空间利用率。同时，加热装置22避开入口130设置，不会增加流体的水力阻力，且环绕叶轮4的泵壳1设计成螺旋形状，从而离心泵100的泵送性能好。此外，利用多个正螺旋导叶32限定出的扩散流道和多个反螺旋导叶33限定出的集中流道，使得流体沿较大的转弯半径流动，减小了流体的弯道损失，且隔板31沿径向由外向内向下凹陷，提高了流体的加热效率。
在本发明的描述中，需要理解的是，术语“中心”、“上”、“下”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。在本发明的描述中，除非另有说明，“多个”的含义是两个或两个以上。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
在本说明书的描述中，参考术语“进一步实施例”、“一些实施例”、“具体实施例”、“可选实施例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例中以合适的方式结合。
尽管已经示出和描述了本发明的实施例，本领域的普通技术人员可以理解：在不脱 离本发明的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由权利要求及其等同物限定。

Claims (20)

  1. 一种离心泵，其特征在于，包括：
    泵壳，所述泵壳内具有加热腔和与所述加热腔连通的泵腔，所述泵壳上设有与所述加热腔连通的入口和与所述泵腔连通的出口；
    加热装置，所述加热装置设在所述泵壳上；
    导流件，所述导流件设在所述加热腔内，所述导流件在所述加热腔内限定出引导由所述入口进入的流体沿所述加热装置的径向向外扩散的扩散流道和引导扩散的流体沿所述加热装置的径向向内集中至所述泵腔的集中流道；
    叶轮，所述叶轮设在所述泵腔内且引导集中至所述泵腔的流体至所述出口。
  2. 根据权利要求1所述的离心泵，其特征在于，所述扩散流道引导由所述入口进入的流体沿所述加热装置的径向向外螺旋扩散，所述集中流道引导扩散的流体沿所述加热装置的径向向内螺旋集中至所述泵腔。
  3. 根据权利要求1所述的离心泵，其特征在于，所述导流件包括：
    隔板；
    多个正螺旋导叶，多个所述正螺旋导叶设在所述隔板的朝向所述加热装置的一侧且在所述隔板的朝向所述加热装置的一侧限定出所述扩散流道；
    多个反螺旋导叶，多个所述反螺旋导叶设在所述隔板的朝向所述泵腔的一侧且在所述隔板的朝向所述泵腔的一侧限定出所述集中流道。
  4. 根据权利要求3所述的离心泵，其特征在于，所述正螺旋导叶和所述反螺旋导叶中的一种沿所述隔板的径向由内至外顺时针偏移且另一种沿所述隔板的径向由内至外逆时针偏移。
  5. 根据权利要求3所述的离心泵，其特征在于，多个所述反螺旋导叶连接在所述加热腔的底壁上，多个所述正螺旋导叶连接在所述隔板上且所述隔板支撑在多个所述反螺旋导叶上。
  6. 根据权利要求5所述的离心泵，其特征在于，多个所述反螺旋导叶一体形成在所述泵壳上，多个所述正螺旋导叶一体形成在所述隔板上。
  7. 根据权利要求5所述的离心泵，其特征在于，所述隔板上设有定位孔且所述反螺旋导叶上设有定位柱，所述定位柱配合在所述定位孔内。
  8. 根据权利要求7所述的离心泵，其特征在于，所述定位柱为多个且分别设在对应的所述反螺旋导叶的内端，所述定位孔为多个且沿所述隔板的周向间隔设置，多个所述定位柱分别配合在多个所述定位孔内。
  9. 根据权利要求3所述的离心泵，其特征在于，多个所述反螺旋导叶和多个所述正螺旋导叶连接在所述隔板上且多个所述反螺旋导叶支撑在所述加热腔的底壁上。
  10. 根据权利要求9所述的离心泵，其特征在于，多个所述反螺旋导叶、多个所述正螺旋导叶和所述隔板一体形成。
  11. 根据权利要求3所述的离心泵，其特征在于，所述泵壳上具有伸入所述加热腔的入口管且所述入口设在所述入口管上，所述正螺旋导叶的内端设有契合槽，所述入口管的伸入所述加热腔的一端配合在多个所述正螺旋导叶的契合槽内。
  12. 根据权利要求3所述的离心泵，其特征在于，所述隔板的朝向所述加热装置的侧表面的中心处设有引导由所述入口进入的流体至多个所述正螺旋导叶的导流块。
  13. 根据权利要求12所述的离心泵，其特征在于，所述导流块为圆锥形且顶点圆弧过渡。
  14. 根据权利要求3所述的离心泵，其特征在于，所述隔板的外周沿相对于所述泵腔更加邻近所述加热装置且所述隔板的中心处相对于所述加热装置更加邻近所述泵腔。
  15. 根据权利要求1-14中任一项所述的离心泵，其特征在于，所述入口的中心轴线、所述泵壳的中心轴线、所述加热装置的中心轴线、所述导流件的中心轴线和所述叶轮的中心轴线相互重合，所述加热腔和所述泵腔在所述泵壳的中心轴线处连通，所述出口设在所述泵壳的外周壁上且中心轴线与所述泵壳的外周壁相切。
  16. 根据权利要求1所述的离心泵，其特征在于，所述泵壳包括：
    壳体，所述加热腔和所述泵腔形成在所述壳体内，所述出口设在所述壳体上；
    罩体，所述罩体可拆卸地安装在所述壳体上且将所述加热装置压紧在所述壳体的上端；
    入口管，所述入口管设在所述罩体上，所述入口设在所述入口管上。
  17. 根据权利要求1所述的离心泵，其特征在于，所述加热装置为具有中心通孔的圆环形加热板，所述中心通孔与所述入口在竖直方向上位置对应。
  18. 根据权利要求17所述的离心泵，其特征在于，所述加热装置的上表面和外周面中的至少一个上设有电阻涂层。
  19. 根据权利要求17所述的离心泵，其特征在于，所述加热装置的内周沿和外周沿分别与所述泵壳之间通过密封圈密封，且所述加热装置的内周沿和/或外周沿与对应的所述密封圈之间设有隔热件。
  20. 根据权利要求1所述的离心泵，其特征在于，还包括：
    端子盒，所述端子盒设在所述加热装置上；
    接线端子，所述接线端子设在所述端子盒内且与所述加热装置电连接，所述接线端子从从所述泵壳露出。
PCT/CN2015/096349 2015-09-29 2015-12-03 离心泵 WO2017054310A1 (zh)

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