CN112727777A - Centrifugal water pump and water supply equipment - Google Patents

Centrifugal water pump and water supply equipment Download PDF

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Publication number
CN112727777A
CN112727777A CN202110142198.7A CN202110142198A CN112727777A CN 112727777 A CN112727777 A CN 112727777A CN 202110142198 A CN202110142198 A CN 202110142198A CN 112727777 A CN112727777 A CN 112727777A
Authority
CN
China
Prior art keywords
water
impeller
pipe section
motor
outlet pipe
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN202110142198.7A
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Chinese (zh)
Inventor
李伟方
王玉东
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangyi Pump Co ltd
Original Assignee
Guangyi Pump Co ltd
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 Guangyi Pump Co ltd filed Critical Guangyi Pump Co ltd
Priority to CN202110142198.7A priority Critical patent/CN112727777A/en
Publication of CN112727777A publication Critical patent/CN112727777A/en
Pending legal-status Critical Current

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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
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage pumps
    • F04D1/08—Multi-stage pumps the stages being situated concentrically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • 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
    • F04D29/40—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

Abstract

The invention discloses a centrifugal water pump, which comprises a pump body, a water inlet pipe section and a water outlet pipe section, wherein the water inlet pipe section and the water outlet pipe section are arranged on the pump body, the water inlet pipe section and the water outlet pipe section are respectively provided with a first motor, a second motor, a first impeller and a second impeller, a middle section is arranged between the water inlet pipe section and the water outlet pipe section, a guide vane is arranged in the middle section, the first impeller and the second impeller rotate to guide water from the water inlet pipe section to the water outlet pipe section through the guide vane, namely the guide vane ensures that the kinetic energy conversion rate is small after the water reaches the water outlet pipe section from the water inlet pipe section, in addition, the product of the invention can normally output the water by utilizing the pressure difference generated by the rotating speed difference between the second impeller and the first impeller, the lifting height of the water pump can be improved by the high rotating speed of the second impeller, the energy consumption of the corresponding second motor is small by combining the action of the guide vane, the invention also provides water supply equipment which has the effects of high use efficiency and high lift.

Description

Centrifugal water pump and water supply equipment
Technical Field
The invention relates to the technical field of water pumps, in particular to a centrifugal water pump and water supply equipment.
Background
In the prior art, a multistage centrifugal pump generally increases the mechanical rotation speed of a corresponding motor to achieve or approach mechanical vacuum in order to obtain a water outlet flow speed provided by the multistage centrifugal pump, but the conversion between the power provided by the motor and the lift of water converted from the power provided by the motor is low due to large kinetic energy loss in a water pipeline and the same rotation speed of a plurality of impellers in the multistage centrifugal pump, and the use efficiency of the multistage centrifugal pump appearing in the reaction is not high.
In addition, chinese patent discloses a "dual-drive two-stage magnetic pump" with publication number CN109973394A, which comprises a first-stage pump and a second-stage magnetic pump, wherein the pump body is provided with a first-stage pump cavity on the right side and a second-stage pump cavity on the left side, and the pump body is provided with a cavity channel communicating a first-stage liquid outlet and a second-stage liquid inlet, so as to form a tandem type magnetic pump.
Disclosure of Invention
The invention aims to solve at least one technical problem mentioned in the background technology, and provides a centrifugal water pump and water supply equipment, which simultaneously have the advantages of improving the lift of the centrifugal water pump and improving the service efficiency of a corresponding motor.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a centrifugal water pump includes a pump body; the water inlet pipe section is arranged on the pump body, a first motor is arranged on the water inlet pipe section, and a first impeller is arranged on a rotating shaft of the first motor; the water outlet pipe section is arranged on the pump body, a second motor is arranged on the water outlet pipe section, and a second impeller is arranged on a rotating shaft of the second motor; a middle section is arranged between the water inlet pipe section and the water outlet pipe section, a guide vane is arranged in the middle section, and the first impeller and the second impeller rotate to guide water from the water inlet pipe section to the water outlet pipe section through the guide vane; and the rotating speed of the second impeller is greater than that of the first impeller.
Compared with the prior art, the centrifugal water pump comprises a pump body, a water inlet pipe section and a water outlet pipe section which are arranged on the pump body, wherein the water inlet pipe section and the water outlet pipe section are respectively provided with a first motor and a second motor, the first motor and the second motor are respectively provided with a first impeller and a second impeller which are correspondingly arranged, a middle section is arranged between the water inlet pipe section and the water outlet pipe section, a guide vane is arranged in the middle section, the first impeller and the second impeller rotate to guide water from the water inlet pipe section to the water outlet pipe section through the guide vane, namely the guide vane changes the change rate of the kinetic energy and the static pressure energy of the water, so that the kinetic energy conversion rate of the water is small after the water reaches the water outlet pipe section from the water inlet pipe section, in addition, the rotating speed of the second impeller is greater than that of the first impeller, and the pressure difference is generated by utilizing the rotating speed difference between the second impeller and the first impeller, so that the product of the, in addition, the unit flow of water is determined by the rotating speed of the first impeller, the lift of the water pump can be improved by the high rotating speed of the second impeller, and the energy consumption of the corresponding second motor is low by combining the action of the guide vane, so that the overall energy efficiency conversion rate of the centrifugal water pump is high, namely the service efficiency is high.
Furthermore, the first motor and the second motor are arranged axially oppositely, the first impeller is arranged in the middle section and mounted, and the second impeller is arranged in the water outlet pipe section and mounted.
Further, be equipped with a plurality of blade groups on the stator, the blade group is including erectting the first blade and the second blade and the slab bridge of connecting first blade and second blade in the stator both sides respectively, constitutes between two sets of adjacent first blade and the second blade the arc runner, the arc runner intercommunication water inlet pipe section and water outlet pipe section.
Furthermore, the first blades or the second blades are in a spiral shape and radially distributed on one side of the guide vane in the circumferential direction relative to the center of the guide vane, so that the circumferential rotational flow speed of liquid is gradually reduced before the liquid enters the water inlet of the second impeller.
Further, the plurality of blade groups are constrained on the guide vane with a mounting region located in the center of the guide vane, the first impeller being disposed within the mounting region.
Furthermore, one end of the water inlet pipe section, which is close to the first impeller, covers a concave buffer area on the first hole, and the concave buffer area can converge water flowing into the water inlet pipeline to the water inlet of the first impeller.
Further, the first motor and the second motor are both magnetic motors.
The invention also provides water supply equipment comprising the centrifugal water pump.
For a better understanding and practice, the invention is described in detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a sectional view of a centrifugal water pump according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a centrifugal water pump in an embodiment of the present invention, illustrating the structure of the water intake pipe section;
FIG. 3 is a schematic diagram of a centrifugal water pump in an embodiment of the present invention, illustrating the structure of the water outlet pipe section;
FIG. 4 is a schematic diagram of a centrifugal water pump in an embodiment of the present invention, indicated as a middle section;
FIG. 5 is a structural perspective view of a guide vane;
FIG. 6 is a structural perspective view of another angle of the guide vane.
Detailed Description
In order to better illustrate the invention, the invention is described in further detail below with reference to the accompanying drawings.
It should be understood that the embodiments described are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the application, as detailed in the appended claims. In the description of the present application, it is to be understood that the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not necessarily used to describe a particular order or sequence, nor are they to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Further, in the description of the present application, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
As shown in fig. 1 to 4, a centrifugal water pump includes a pump body 100; the water inlet pipe section 1 is arranged on the pump body 100, a first motor 11 is arranged on the water inlet pipe section 1, and a first impeller 12 is arranged on a rotating shaft of the first motor 11; the water outlet pipe section 2 is arranged on the pump body 100, a second motor 21 is arranged on the water outlet pipe section 2, and a second impeller 22 is arranged on a rotating shaft of the second motor 21; a middle section 3 is arranged between the water inlet pipe section 1 and the water outlet pipe section 2, a guide vane 31 is arranged in the middle section 3, and the first impeller 12 and the second impeller 22 rotate to guide water from the water inlet pipe section 1 to the water outlet pipe section 2 through the guide vane 31; and the rotational speed of the second impeller 22 is greater than the rotational speed of the first impeller 12.
Compared with the prior art, the centrifugal water pump of the embodiment comprises a pump body 100, a water inlet pipe section 1 and a water outlet pipe section 2 which are arranged on the pump body 100, wherein the water inlet pipe section 1 and the water outlet pipe section 2 are respectively provided with a first motor 11 and a second motor 21, the first motor 11 and the second motor 21 are respectively provided with a first impeller 12 and a second impeller 22 which are correspondingly arranged, an intermediate section 3 is arranged between the water inlet pipe section 1 and the water outlet pipe section 2, a guide vane 31 is arranged in the intermediate section 3, the first impeller 12 and the second impeller 22 rotate to guide water from the water inlet pipe section 1 to the water outlet pipe section 2 through the guide vane 31, namely the guide vane 31 changes the change rate of the kinetic energy and the static pressure energy of the water, so that the kinetic energy conversion rate is small after the water reaches the water outlet pipe section 2 from the water inlet pipe section 1, in addition, the rotating speed of the second impeller 22 is greater than that of the first impeller 12, and the pressure difference is generated by the rotating, the product of the invention can normally output water, in addition, the rotating speed of the first impeller 12 determines the unit flow rate of the water in the invention, the high rotating speed of the second impeller 22 can improve the lift of the water pump, and in combination with the action of the guide vane 31, the corresponding second motor 21 consumes less energy, so that the overall energy efficiency conversion rate of the centrifugal water pump is high, namely the use efficiency is high.
It should be noted that the unit flow rate of water specified above is the volume of water that is guided to flow out through the first impeller 12 in this embodiment at every second/minute/hour, wherein the water specified in this embodiment belongs to a substance that can flow through the centrifugal water pump, and it can also be other substances that can flow through the centrifugal water pump, such as sewage and the like.
In this embodiment, the first impeller 12 and the second impeller 22 rotate to guide water from the water inlet pipe section 1 to the water outlet pipe section 2 through the guide vanes 31, the guide vanes 31 therein play a considerable role in guiding the water, in order to slow down the conversion between the kinetic energy and the static pressure energy of the water itself, so that the water still has a considerable flow velocity when reaching the second impeller 22 from the first impeller 12, and the part of the water still has a certain kinetic energy after reaching the second impeller 22, i.e. there is a certain horizontal velocity, whereas the water is not changed from a static state when it is extracted by the second impeller 22, according to which, since the first impeller 12 and the second impeller 22 are respectively arranged on the water inlet pipe section 1 and the water outlet pipe section 2, there is also an intermediate section 3 therebetween, so that the unit flow rate of water of the centrifugal water pump in the present embodiment is determined by the rotational speed at which the first impeller 12 is driven by the first motor 11; the unit flow rate is equivalent to a constant load, and under the condition that the load is constant and the work of the second motor 21 for driving the second impeller 22 is constant, the lift of the unit flow rate of water can be increased, and the use efficiency of the centrifugal water pump is correspondingly improved.
In the present embodiment, as shown in fig. 1, the first motor 11 and the second motor 21 are axially disposed opposite to each other, so that the horizontal distance that the water passes through the middle section 3 can be reduced, and the kinetic energy conversion of the water can be relatively reduced.
Moreover, the first impeller 12 is arranged in the middle section 3, and the action range of the negative pressure generated when the first impeller 12 rotates is limited in the middle section 3; the second impeller 22 is arranged in the water outlet pipe section 2, and the action range of negative pressure generated when the second impeller 22 rotates is limited in the water outlet pipe section 2.
Of course, there is a distinguishing component between the middle section 3 and the water inlet pipe section 1 and the water outlet pipe section 2, and the middle section 3 is divided into an independent space region, so that there is a relatively significant pressure difference between the water outlet pipe section 2 and the middle section 3, and in combination with the above-mentioned rotation speed of the second impeller 22 being greater than the rotation speed of the first impeller 12, the water circulating in the centrifugal water pump can flow from the middle section 3 to the water outlet pipe section 2 when the first motor 11 and the second motor 21 work synchronously.
In the present embodiment, as shown in fig. 5 to 6, a plurality of blade groups 32 are disposed on the guide vane 31, each blade group 32 includes a first blade 321 and a second blade 322 respectively erected on two sides of the guide vane 31, and a plate bridge 323 connecting the first blade 321 and the second blade 322, the two adjacent groups of the first blade 321 and the second blade 322 form the arc-shaped flow channel 324, and the arc-shaped flow channel 324 communicates the water inlet pipe section 1 and the water outlet pipe section 2.
When the first impeller 12 guides the water in the water inlet pipe section 1 to the middle section 3 through the centrifugal force, the water enters the arc-shaped flow channel 324 in a tangential direction, and the water reaches the second impeller 22 through the arc-shaped flow channel 324, the conversion rate of the kinetic energy of the water into the static pressure energy is reduced due to the action of the arc-shaped flow channel 324, so that the water still has equivalent kinetic energy when being output to the second impeller 22, and equivalent water has a certain initial speed and is taken out by the second impeller 22, under the condition of ensuring a certain lift, the power consumption of the second motor 21 is reduced, and the use efficiency of the second motor 21 is improved.
The first blades 321 or the second blades 322 are spirally and radially arranged at one side of the guide vane 31 in the circumferential direction of the center of the guide vane, and certainly, when water is converged at the second impeller 22 through the plurality of arc-shaped flow channels 324, a certain rotational flow is formed at the center of the second impeller 22, and the specific effect of the formation of the rotational flow also corresponds to that the kinetic energy and the static pressure energy of the water are not changed violently when the water reaches the position of the second impeller 22.
Furthermore, the plurality of blade sets 32 are constrained on the guide vane 31 by a mounting region 325 located in the center of the guide vane 31, the first impeller 12 being placed inside the mounting region 325.
One of the mounting regions 325 is provided to prevent interference between the first impeller 12 and the blade assembly 32 to prevent the blade assembly 32 from interfering with the rotation of the first impeller 12, and another is provided to facilitate the introduction of water into the arcuate flow passage 324 when the first impeller 12 is rotated.
In this embodiment, as shown in fig. 2, one end of the water inlet pipe section 1 close to the first impeller 12 covers a concave buffer area 13 on the first hole, and the concave buffer area 13 can converge the water flowing into the water inlet pipe to the water inlet of the first impeller 12.
In the present embodiment, as a preferable mode of the first motor 11 and the second motor 21, both the first motor 11 and the second motor 21 are magnetic motors.
The embodiment also provides water supply equipment, which comprises the centrifugal water pump, and the water supply equipment has the effects of energy conservation and high lift.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims (8)

1. A centrifugal water pump is characterized by comprising
A pump body;
the water inlet pipe section is arranged on the pump body, a first motor is arranged on the water inlet pipe section, and a first impeller is arranged on a rotating shaft of the first motor;
the water outlet pipe section is arranged on the pump body, a second motor is arranged on the water outlet pipe section, and a second impeller is arranged on a rotating shaft of the second motor;
a middle section is arranged between the water inlet pipe section and the water outlet pipe section, a guide vane is arranged in the middle section, and the first impeller and the second impeller rotate to guide water from the water inlet pipe section to the water outlet pipe section through the guide vane; and the rotating speed of the second impeller is greater than that of the first impeller.
2. The centrifugal water pump of claim 1,
the first motor and the second motor are arranged oppositely in the axial direction, the first impeller is arranged in the middle section and installed, and the second impeller is arranged in the water outlet pipe section and installed.
3. The centrifugal water pump of claim 1,
be equipped with a plurality of blade groups on the stator, the blade group is including erectting the first blade and the second blade and the slab bridge of connecting first blade and second blade in the stator both sides respectively, constitutes between two sets of adjacent first blade and the second blade the arc runner, the arc runner intercommunication is intake the pipeline section and is gone out the water pipeline section.
4. The centrifugal water pump of claim 3,
the first blades or the second blades are in a spiral shape and are radially distributed on one side of the guide vane in the circumferential direction relative to the center of the guide vane.
5. The centrifugal water pump of claim 3,
the blade groups are restricted on the guide vane with a mounting area positioned in the center of the guide vane, and the first impeller is arranged in the mounting area.
6. The centrifugal water pump of claim 1,
one end of the water inlet pipe section, which is close to the first impeller, covers the concave buffer area on the first hole, and the concave buffer area can converge water flowing into the water inlet pipeline to the water inlet of the first impeller.
7. The centrifugal water pump of claim 1,
the first motor and the second motor are both magnetic motors.
8. A water supply installation, characterized in that it comprises a centrifugal water pump according to any one of claims 1 to 7.
CN202110142198.7A 2021-02-02 2021-02-02 Centrifugal water pump and water supply equipment Pending CN112727777A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110142198.7A CN112727777A (en) 2021-02-02 2021-02-02 Centrifugal water pump and water supply equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110142198.7A CN112727777A (en) 2021-02-02 2021-02-02 Centrifugal water pump and water supply equipment

Publications (1)

Publication Number Publication Date
CN112727777A true CN112727777A (en) 2021-04-30

Family

ID=75595499

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110142198.7A Pending CN112727777A (en) 2021-02-02 2021-02-02 Centrifugal water pump and water supply equipment

Country Status (1)

Country Link
CN (1) CN112727777A (en)

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