CN111577608B - Centrifugal pump - Google Patents

Centrifugal pump Download PDF

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Publication number
CN111577608B
CN111577608B CN202010444507.1A CN202010444507A CN111577608B CN 111577608 B CN111577608 B CN 111577608B CN 202010444507 A CN202010444507 A CN 202010444507A CN 111577608 B CN111577608 B CN 111577608B
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China
Prior art keywords
pump
blade
cover plate
positioning
shaft sleeve
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Application number
CN202010444507.1A
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Chinese (zh)
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CN111577608A (en
Inventor
宋来瑞
盛庆梅
其他发明人请求不公开姓名
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Shanghai Liancheng Group Co Ltd
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Shanghai Liancheng Group Co Ltd
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Priority to CN202010444507.1A priority Critical patent/CN111577608B/en
Publication of CN111577608A publication Critical patent/CN111577608A/en
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Publication of CN111577608B publication Critical patent/CN111577608B/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0055Rotors with adjustable blades
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/18Rotors
    • F04D29/22Rotors specially for centrifugal pumps
    • F04D29/2261Rotors specially for centrifugal pumps with special measures
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/18Rotors
    • F04D29/22Rotors specially for centrifugal pumps
    • F04D29/24Vanes
    • F04D29/242Geometry, shape

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses a centrifugal pump, which comprises a pump body, wherein a pump cavity is arranged in the pump body, the pump body is provided with a pump cover, a power shaft is arranged in the pump cover, an impeller assembly is fixedly arranged on the power shaft in the pump cavity, and a water inlet pipeline and a water outlet pipeline are arranged on the side surface of the pump body; the impeller assembly comprises a first cover plate and a second cover plate, the first cover plate is fixedly arranged on the power shaft, a plurality of first blades are arranged on the first cover plate, and the second cover plate is fixedly arranged on the first blades; each first blade is internally provided with an arc-shaped blade groove, and a second blade is connected in each blade groove in a sliding manner; the first cover plate is provided with a limiting groove communicated with the blade groove; a first shaft sleeve is arranged on the first cover plate, an adjusting disc is rotatably connected on the first shaft sleeve, a radial sliding groove is formed in the adjusting disc, and a convex column is arranged on one side of each second blade; the centrifugal pump is simple in structure and can be adjusted to change the discharge capacity according to needs.

Description

Centrifugal pump
Technical Field
The invention belongs to the technical field of centrifugal pumps, and particularly relates to a centrifugal pump with variable displacement.
Background
The centrifugal pump is a machine for conveying liquid or pressurizing liquid, transfers the mechanical energy of a prime motor or other external energy to the liquid to increase the energy of the liquid, is mainly used for conveying the liquid, such as water, oil, acid-base liquid, emulsion, suspoemulsion, liquid metal and the like, and can also convey the liquid, gas mixture and the liquid containing suspended solids; the technical parameters for measuring the performance of the centrifugal pump include flow, suction lift, shaft power, water power, efficiency and the like. The existing centrifugal pump can only change the discharge capacity of the pump by adjusting the rotating speed, which not only influences the efficiency of the pump and the lift of the pump, but also needs a speed adjusting mechanism to control. Because speed adjusting mechanisms such as frequency converters are expensive, when different flow rates are needed, the control is widely adopted by changing pipeline characteristics through a throttle valve, and a large amount of energy is wasted.
Disclosure of Invention
The invention aims to provide a centrifugal pump which is simple in structure and can adjust and change the displacement according to requirements.
In order to achieve the purpose, the invention provides the following technical scheme:
a centrifugal pump comprises a pump body, wherein a pump cavity is arranged in the pump body, a pump cover is arranged at an opening of the pump cavity of the pump body, a power shaft with one end extending into the pump cavity is arranged in the pump cover, an impeller assembly is fixedly arranged on the power shaft in the pump cavity, a water inlet pipeline communicated with the pump cavity is arranged on the side surface of the pump body along the axial direction of the power shaft, and a water outlet pipeline communicated with the pump cavity is arranged along the radial direction of the impeller assembly; the impeller assembly comprises a first cover plate and a second cover plate, the first cover plate is fixedly arranged on the power shaft, a plurality of first blades are uniformly arranged on the first cover plate at intervals along the circumferential direction of the power shaft, and the second cover plate is fixedly arranged on the first blades; each first blade is internally provided with an arc-shaped blade groove, and a second blade is connected in each blade groove in a sliding manner; a limiting groove communicated with the blade groove is formed in the first cover plate along the motion direction of the second blade, and one side of the second blade is positioned in the limiting groove; the first cover plate is provided with a first shaft sleeve in a sleeved mode on the power shaft in an extending mode, the first shaft sleeve is connected with an adjusting disc in a rotating mode, a plurality of radial sliding grooves corresponding to the second blades in a one-to-one mode are arranged on the adjusting disc along the circumferential direction, a protruding column extending into the corresponding radial sliding grooves is arranged on one side of each second blade, and when the adjusting disc rotates, the protruding columns in the radial sliding grooves drive the second blades to extend out or retract into the blade grooves.
According to the technical scheme, when the discharge capacity of the centrifugal pump needs to be adjusted to be large, the adjusting disc is rotated, the convex column is driven to move through the radial sliding groove when the adjusting disc rotates, so that the convex column drives the second blade to extend out of the blade groove, the longer the extending length of the second blade is, the larger the discharge capacity of the centrifugal pump is, the same principle can be achieved, and when the discharge capacity of the centrifugal pump needs to be adjusted, the adjusting disc is rotated reversely; the centrifugal pump has the advantages of simple structure, low cost and capability of changing the output flow of the centrifugal pump without additional frequency converter control.
Furthermore, a second shaft sleeve sleeved on the first shaft sleeve extends from the adjusting disc, and a positioning assembly is arranged between the first shaft sleeve and one end, extending out of the pump cover, of the second shaft sleeve; the positioning assembly comprises a positioning block, the positioning block comprises a ring sleeve and a positioning pin arranged on the ring sleeve, a first positioning opening is formed in the outer side of one end, extending out of the pump cover, of the first shaft sleeve, a plurality of second positioning openings are formed in the inner side, extending out of the pump cover, of the second shaft sleeve along the circumferential direction, and when the second positioning openings are communicated with the first positioning openings in a rotating mode, the positioning pin is inserted into a positioning hole formed by the first positioning openings and the second positioning openings; this setting makes and rotates the in-process at the adjustment disk, just right with first locating hole position through controlling second locating hole, will fix a position down again and insert the location that can realize the adjustment disk fast in the locating hole that first locating hole and second locating hole formed.
Furthermore, a limit nut is fixedly mounted on the outer side of one end, extending out of the pump cover, of the second shaft sleeve, and the limit nut is used for preventing the positioning pin from being separated from the positioning hole.
Furthermore, a first sliding groove communicated with the blade groove is formed in the side wall, facing the first cover plate, of the second cover plate along the motion direction of the second blade, and when the second blade extends out of the blade groove, one side of the second blade extends into the first sliding groove; should set up both sides when the second blade stretches out and be located first spout and spacing inslot respectively to it is more firm to make the second blade.
Furthermore, a flow guide cap is fixedly arranged at one end, extending into the pump cavity, of the power shaft of the first cover plate.
Furthermore, when the convex column is located at the proximal end of the radial sliding groove, the second blade is completely retracted into the blade groove, and when the convex column is located at the distal end of the radial groove, the second blade completely extends out of the blade groove.
Advantageous effects
Compared with the prior art, the technical scheme of the invention has the following advantages:
when the discharge capacity of the centrifugal pump needs to be adjusted to be large, the adjusting disc is rotated, the convex column is driven to move through the radial sliding groove when the adjusting disc rotates, and then the convex column drives the second blade to extend out of the blade groove, the longer the extending length of the second blade is, the larger the discharge capacity of the centrifugal pump is, and the same reason is that when the discharge capacity of the centrifugal pump needs to be adjusted, the adjusting disc is rotated reversely; the centrifugal pump has the advantages of simple structure, low cost and energy conservation, and can change the output flow of the centrifugal pump without the control of an additional frequency converter.
Drawings
FIG. 1 is a schematic three-dimensional structure of the present invention;
FIGS. 2-4 are plan view structural diagrams of the present invention;
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 6 is a cross-sectional view taken along line B-B of FIG. 3;
FIGS. 7-8 are schematic views of the present invention showing the maximum displacement;
FIGS. 9-10 are schematic views of the present invention with minimum displacement;
FIGS. 11-12 are schematic three-dimensional views of an impeller assembly according to the present invention;
FIG. 13 is a schematic three-dimensional view of the actuator disk of the present invention;
FIG. 14 is a schematic three-dimensional view of a second blade according to the present invention;
fig. 15 is a schematic three-dimensional structure diagram of the positioning block of the present invention.
Detailed Description
Referring to fig. 1-15, a centrifugal pump includes a pump body 1, a pump cavity 1a is provided in the pump body 1, a pump cover 11 is fixedly installed at an opening of the pump cavity 1a in the pump body 1, a power shaft 4 with one end extending into the pump cavity 1a is provided in the pump cover 11, an impeller assembly is fixedly installed on the power shaft 4 in the pump cavity 1a, a water inlet pipe 1b communicated with the pump cavity 1a is provided on a side surface of the pump body 1 along an axial direction of the power shaft 4, and a water outlet pipe 1c communicated with the pump cavity 1a is provided along a radial direction of the impeller assembly; the impeller assembly comprises a first cover plate 21 and a second cover plate 22, the first cover plate 21 is fixedly arranged on the power shaft 4, and a flow guide cap 23 is fixedly arranged at one end, extending into the pump cavity 1a, of the power shaft 4 of the first cover plate 21; six first blades 2a are uniformly arranged on the first cover plate 21 at intervals along the circumferential direction of the power shaft 4, and the second cover plate 22 is fixedly arranged on the first blades 2 a; each first vane 2a is internally provided with an arc vane slot 2a1, and a second vane 5 is connected in each vane slot 2a1 in a sliding way; a limiting groove 21a communicated with the blade groove 2a1 is formed in the first cover plate 21 along the motion direction of the second blade 5, and one side of the second blade 5 is positioned in the limiting groove 21 a; the first cover plate 21 is provided with a first shaft sleeve 21b in an extending manner, the first shaft sleeve 21b is sleeved on the power shaft 4, the first shaft sleeve 21b is connected with an adjusting disc 3 in a rotating manner, the adjusting disc 3 is provided with six radial sliding grooves 3a corresponding to the second blades 5 one by one along the circumferential direction, one side of each second blade 5 is provided with a convex column 5a extending into the corresponding radial sliding groove 3a, and when the adjusting disc 3 rotates, the convex column 5a in the radial sliding groove 3a drives the second blade 5 to extend out of or retract into the blade groove 2a 1; when the boss 5a is located at the proximal end of the radial sliding groove 3a, the second blade 5 is completely retracted into the blade groove 2a1, and when the boss 5a is located at the distal end of the radial groove, the second blade 5 is completely extended out of the blade groove 2a 1.
A second shaft sleeve 31 sleeved on the first shaft sleeve 21b extends from the adjusting disc 3, and a positioning assembly is arranged between one ends of the first shaft sleeve 21b and the second shaft sleeve 31, which extend out of the pump cover 11; the positioning assembly comprises a positioning block, the positioning block comprises a ring sleeve 6 and a positioning pin 61 arranged on the ring sleeve 6, a first positioning opening 21c is formed in the outer side of one end, extending out of the pump cover 11, of the first shaft sleeve 21b, four second positioning openings 31a are formed in the inner side of one end, extending out of the pump cover 11, of the second shaft sleeve 31 along the circumferential direction, and when the second positioning openings 31a are communicated with the first positioning opening 21c, the positioning pin 61 is inserted into a positioning hole formed by the first positioning opening 21c and the second positioning opening 31 a; this setting makes in the adjusting disk 3 rotation process, just right with first locating hole 21c position through controlling second locating hole 31a, will fix a position down and insert the locating hole that first locating hole 21c and second locating hole 31a formed and can realize adjusting disk 3's location fast again. And a limiting nut is fixedly arranged on the outer side of one end of the second shaft sleeve 31 extending out of the pump cover 11 and is used for preventing the positioning pin 61 from being separated from the positioning hole.
The second cover plate 22 is provided with a first sliding slot 22a communicated with the blade slot 2a1 on the side wall facing the first cover plate 21 along the moving direction of the second blade 5, when the second blade 5 extends out of the blade slot 2a1, one side of the second blade 5 extends into the first sliding slot 22 a; the arrangement is such that the second blade 5 is more secure as both sides are respectively located in the first sliding groove 22a and the limiting groove 21a when the second blade 5 is extended.
This centrifugal pump is when needs are increaseed the discharge capacity, at first screws off limit nut, then takes out the locating piece, rotates adjusting disk 3 after that, drives the motion of projection 5a through radial spout 3a when adjusting disk 3 rotates, and then makes projection 5a drive second blade 5 and stretch out blade groove 2a1, and the length that second blade 5 stretched out is longer more, and the discharge capacity of centrifugal pump just is big more, when projection 5a is located the telecentric end of radial groove, second blade 5 stretches out blade groove 2a1 completely, and the discharge capacity of centrifugal pump is the biggest this moment. After the adjustment is completed, the lower positioning part is inserted into the positioning hole formed by the first positioning hole 21c and the second positioning hole 31a, and the limiting nut is screwed up, so that the adjustment plate 3 is fixed.
In the same way, when the displacement of the centrifugal pump needs to be adjusted, the adjusting disc 3 is rotated reversely, wherein when the convex column 5a is located at the proximal end of the radial sliding groove 3a, the second blade 5 is completely retracted into the blade groove 2a1, and the displacement of the centrifugal pump is the minimum at this time; the centrifugal pump has the advantages of simple structure, low cost and capability of changing the output flow of the centrifugal pump without additional frequency converter control.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (3)

1. A centrifugal pump comprises a pump body, wherein a pump cavity is arranged in the pump body, a pump cover is arranged at an opening of the pump cavity of the pump body, a power shaft with one end extending into the pump cavity is arranged in the pump cover, an impeller assembly is fixedly arranged on the power shaft in the pump cavity, a water inlet pipeline communicated with the pump cavity is arranged on the side surface of the pump body along the axial direction of the power shaft, and a water outlet pipeline communicated with the pump cavity is arranged along the radial direction of the impeller assembly; the impeller assembly is characterized by comprising a first cover plate and a second cover plate, wherein the first cover plate is fixedly arranged on a power shaft, a plurality of first blades are uniformly arranged on the first cover plate at intervals along the circumferential direction of the power shaft, and the second cover plate is fixedly arranged on the first blades; each first blade is internally provided with an arc-shaped blade groove, and a second blade is connected in each blade groove in a sliding manner; a limiting groove communicated with the blade groove is formed in the first cover plate along the motion direction of the second blade, and one side of the second blade is positioned in the limiting groove; the first cover plate is provided with a first shaft sleeve sleeved on the power shaft in an extending mode, the first shaft sleeve is connected with an adjusting disc in a rotating mode, a plurality of radial sliding grooves corresponding to the second blades one by one are formed in the adjusting disc in the circumferential direction, a protruding column extending into the corresponding radial sliding groove is arranged on one side of each second blade, and when the adjusting disc rotates, the protruding columns in the radial sliding grooves drive the second blades to extend out of or retract into the blade grooves;
a second shaft sleeve sleeved on the first shaft sleeve extends from the adjusting disc, and a positioning assembly is arranged between the first shaft sleeve and one end of the second shaft sleeve, which extends out of the pump cover; the positioning assembly comprises a positioning block, the positioning block comprises a ring sleeve and a positioning pin arranged on the ring sleeve, a first positioning opening is formed in the outer side of one end, extending out of the pump cover, of the first shaft sleeve, a plurality of second positioning openings are formed in the inner side, extending out of the pump cover, of the second shaft sleeve along the circumferential direction, and when the second positioning openings are communicated with the first positioning openings in a rotating mode, the positioning pin is inserted into a positioning hole formed by the first positioning openings and the second positioning openings;
the second shaft sleeve is fixedly provided with a limiting nut at the outer side of one end extending out of the pump cover, and the limiting nut is used for preventing the positioning pin from being separated from the positioning hole;
the second apron is equipped with the first spout with the blade groove intercommunication along second blade direction of motion on the lateral wall towards first apron, when the second blade stretches out the blade groove, one side of second blade stretches into in the first spout.
2. The centrifugal pump of claim 1 wherein said first cover plate has a deflector cap fixedly mounted to an end of the power shaft extending into the pump chamber.
3. The centrifugal pump of claim 1 wherein said second vane is fully retracted into said vane slot when said post is located at a proximal end of said radial slot and fully extended out of said vane slot when said post is located at a distal end of said radial slot.
CN202010444507.1A 2020-05-23 2020-05-23 Centrifugal pump Active CN111577608B (en)

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CN202010444507.1A CN111577608B (en) 2020-05-23 2020-05-23 Centrifugal pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010444507.1A CN111577608B (en) 2020-05-23 2020-05-23 Centrifugal pump

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CN111577608A CN111577608A (en) 2020-08-25
CN111577608B true CN111577608B (en) 2021-08-24

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112360747B (en) * 2020-11-12 2022-07-01 石家庄石一泵业有限公司 Centrifugal pump with adjustable online lift
CN112682322A (en) * 2020-12-21 2021-04-20 重庆水利电力职业技术学院 A environmental protection and energy saving water pump for agricultural hydraulic engineering
CN112524086A (en) * 2021-01-07 2021-03-19 无锡市勤达富流体科技有限公司 Impeller and centrifugal pump of adjustable diameter
CN112460030B (en) * 2021-01-29 2021-06-01 亚太泵阀有限公司 Adjustable self-suction type sewage pump and using method thereof
CN113339319B (en) * 2021-06-29 2023-12-01 周广达 Automobile water pump

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87201871U (en) * 1987-02-11 1988-06-15 任树来 Centrifugal pump with adjustable diameter of impeller
WO2007131658A1 (en) * 2006-05-11 2007-11-22 Wilo Ag Radial centrifugal pump with blades which are variable according to the rotational direction
CN103835988A (en) * 2014-03-11 2014-06-04 门立山 Centrifugal pump impeller
CN105134645A (en) * 2015-09-01 2015-12-09 兰州理工大学 Impeller and centrifugal pump provided with same
CN109458347A (en) * 2018-10-30 2019-03-12 杭州富阳锦丰纸业有限公司 A kind of urea dispenser pump
CN209976810U (en) * 2019-06-11 2020-01-21 重庆巨好泵业有限公司 Centrifugal pump
RU2714028C1 (en) * 2019-02-22 2020-02-11 Алексей Николаевич Панькин Centrifugal pump

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2405669C (en) * 2000-04-13 2009-10-13 Tesma International Inc. Variable flow water pump
US20160312789A1 (en) * 2015-04-22 2016-10-27 SYNCRUDE CANADA LTD. in trust for the owners of the Syncrude Project as such owners exist now a Composite impeller for a centrifugal slurry pump
US10533571B2 (en) * 2018-01-20 2020-01-14 Carolyn Rende Fortin Pump systems with variable diameter impeller devices

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87201871U (en) * 1987-02-11 1988-06-15 任树来 Centrifugal pump with adjustable diameter of impeller
WO2007131658A1 (en) * 2006-05-11 2007-11-22 Wilo Ag Radial centrifugal pump with blades which are variable according to the rotational direction
CN103835988A (en) * 2014-03-11 2014-06-04 门立山 Centrifugal pump impeller
CN105134645A (en) * 2015-09-01 2015-12-09 兰州理工大学 Impeller and centrifugal pump provided with same
CN109458347A (en) * 2018-10-30 2019-03-12 杭州富阳锦丰纸业有限公司 A kind of urea dispenser pump
RU2714028C1 (en) * 2019-02-22 2020-02-11 Алексей Николаевич Панькин Centrifugal pump
CN209976810U (en) * 2019-06-11 2020-01-21 重庆巨好泵业有限公司 Centrifugal pump

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