CN106930950A - Speed variable low noise self-priming combination pump - Google Patents
Speed variable low noise self-priming combination pump Download PDFInfo
- Publication number
- CN106930950A CN106930950A CN201710298179.7A CN201710298179A CN106930950A CN 106930950 A CN106930950 A CN 106930950A CN 201710298179 A CN201710298179 A CN 201710298179A CN 106930950 A CN106930950 A CN 106930950A
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- CN
- China
- Prior art keywords
- motor
- pump
- priming
- self
- speed
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 230000001360 synchronised effect Effects 0.000 claims abstract description 21
- 150000001875 compounds Chemical class 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000006870 function Effects 0.000 abstract description 8
- 230000003923 mental ability Effects 0.000 abstract description 2
- 230000006698 induction Effects 0.000 description 4
- 238000009690 centrifugal atomisation Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
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
- F04D9/00—Priming; Preventing vapour lock
- F04D9/04—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock
- F04D9/06—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock of jet type
-
- 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
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
- F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
-
- 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of speed variable low noise self-priming combination pump.The present invention includes permagnetic synchronous motor, intelligent motor control panel, the pump housing, impeller, injector.The motor that the pump is used is permagnetic synchronous motor, the rotary shaft of motor is connected with the centrifugal impeller in the pump housing, intelligent motor control panel controlled motor rotating speed, the reception processing of sensor signal and the triggering of control instruction, are easy to improve lift, flow, suction capacity and intelligent level of the motor speed to lift combination pump；When being equipped with water flow sensing unit or pressure sensor; pressure signal in water-flow signal and the pump housing can be gathered by intelligent motor control panel; realize that the primary mental ability of " being started shooting with water, Guan Shui shuts down " is controlled, can further expand the extension function such as self-priming exhaust under " frequent starting ", constant pressure water supply and the optimized rotating speed solved when low discharge supplies water.The present invention is obviously improved in the service behaviour of the aspects such as intellectuality, efficiency, flow, lift, self-priming speed.
Description
Technical field
The present invention relates to a kind of centrifugal atomization combination pump, more particularly to a kind of speed variable low noise self-priming combination pump, category
In field of fluid machinery.
Background technology
Pump be it is a kind of have a large capacity and a wide range, the universal machine that energy ezpenditure is huge, it is every have liquid flow place nearly all have
Pump is in work.Counted according to Chinese universal machine association, in recent years more than 100,000,000,000 yuan of the average annual gross output value of national pump industry, water pump consumption
Electricity accounts for the 20% of national power consumption.
At present, the disclosed low noise self-priming combination pump in miscellaneous small-sized land pump product（Application number：
201610813048.3；The A of application publication number CN 106224249）It is the pump class product of a kind of new, low noise, efficient, energy-conservation
Product, this centrifugal atomization combination pump is substantially centrifugal pump and tradition without leaf jet pump（Jet pump）Ingenious combination.With it is existing
The peripheral pump of small-sized land pump leading market is compared with jet pump, this pump suction capacity is strong, suction is high, noise is low, flow is big,
Efficiency high, has wide in many industrial circles such as heating, tap water boosting, mining machinery, shipbuilding, petrochemical industry that supply water
Application prospect, market potential is huge, energy-saving and noise-reducing effect is significant.
If even so, published low noise self-priming combination pump simply mixes traditional single-phase or phase asynchronous electricity
The AC induction motors such as machine, the potentiality of its high energy efficiency are actually to be constrained from what is given full play to, follow-up feasible intelligence
Energy functions expanding is similarly fettered by this.
Similar with common small-sized land pump, common self-priming combination pump typically uses AC induction motor, due to being subject to
Ac frequency is influenceed, and the rotating speed of AC induction motor has been limited.The rotating speed of asynchronous machine when alternating current rotating speed is 50HZ
Theoretical value is only 3000rpm, and due to mechanical loss, non-fully dynamic balancing the problems such as, actually national standard requirement exchange
Rotational Speed of Asynchronous Motor is only 2860rpm.When the rotating speed of motor is improved, the noise of centrifugal atomization combination pump is substantially not increased same
When, its lift, flow can be increased substantially, but first be equipped with frequency converter if improving Rotational Speed of Asynchronous Motor and obtaining, then by frequency conversion
Device controls asynchronous AC motor, and this way control accuracy is not high, and improved efficiency is little, and cost is then increased substantially.
The content of the invention
Revolution speed is non-adjustable, efficiency is improved for being combined by the common low noise self-priming of ACasynchronous motor drive for the present invention
With intelligent limited deficiency, propose a kind of low by the motor-driven speed variable of the New-generation efficient energy-savings such as permagnetic synchronous motor
Noise self-priming combination pump.
It is an object of the invention to using the New-generation efficient energy-saving motor speed variable such as permagnetic synchronous motor, can be intelligent
Change, the advantages of efficiency is high, moment of torsion is big, rotating speed is high, realizes the variable speed of combination pump, lifting Based Intelligent Control level, expand intelligence
Control function, so as to provide the synthetic operation performances such as a kind of low noise, pump efficiency high, flow, lift and suction compare commonly
The more excellent speed variable combination pump of the combination pump of ACasynchronous motor drive.
To achieve these goals, the technical solution adopted by the present invention is：
A kind of speed variable low noise self-priming combination pump, including permagnetic synchronous motor, intelligent motor control panel, the pump housing, impeller, spray
Emitter（It is made up of nozzle and anemostat）, it is characterized by the motor that the pump is used is permagnetic synchronous motor, the rotary shaft of motor
It is connected with the centrifugal impeller in the pump housing, intelligent motor control panel controlled motor rotating speed, the reception processing and control of sensor signal
The triggering of instruction, is easy to improve lift, flow, suction capacity and intelligent level of the motor speed to lift combination pump；It is equipped with
When water flow sensing unit or pressure sensor, pressure signal in water-flow signal and the pump housing can be gathered by intelligent motor control panel,
Realize that the primary mental ability of " being shut down with water start, Guan Shui " is controlled, can further expand " frequent when solution low discharge supplies water
Startup ", constant pressure water supply and the extension function such as self-priming exhaust under optimized rotating speed.Speed variable low noise self-priming combination pump of the invention
It is obviously improved in the service behaviour of the aspects such as intellectuality, efficiency, flow, lift, self-priming speed.
Described energy-saving efficient motor is permagnetic synchronous motor.
Described intelligent motor control panel can adjust motor speed, and motor maximum speed can be also small more than 3000rpm
In 3000rpm.
Described intelligent motor control panel can receive pressure or water-flow signal, signal is processed, and according to treatment
Signal send instruction controlled motor rotating speed（0 rpm ~ highest motor speed）.
The connection of described centrifugal impeller with motor can be directly connected to by electric machine rotational axis and impeller, it is also possible to by joining
Axle device connects impeller and electric machine rotational axis.
Described centrifugal impeller and centrifugation runner can be single-stage or multi-stage impeller, single-stage or multistage centrifugal runner.
Described pressure sensor and water flow sensing unit can individually be equipped with, while being equipped with or not being equipped with.
Described pressure sensor is mountable to optional position in the pump housing, water flow sensing unit and can be installed on compound pumping into
In mouth, compound pump discharge or the pump housing.
By using above technical scheme, compared with prior art, the invention has the advantages that：
1）Using permagnetic synchronous motor speed variable the characteristics of, adjustment rotating speed can be actually needed according to water terminal, enter
And flow and lift are controlled, the flow and pressure of stable water supply terminal.
2）Using permagnetic synchronous motor efficiency is high, small volume advantage, the volume of combination pump can be reduced, reduce rotor,
The consumption of stator raw material, greatly improves mechanical efficiency, effective reducing energy consumption.
3）Using the low advantage of permagnetic synchronous motor temperature rise, radiator fan can be reduced or without fan heat, simplify life
While producing operation and material cost, air-cooled noise can also be effectively reduced, further the characteristics of performance combination pump low noise.
4）It is the characteristics of using permagnetic synchronous motor adjustable height rotating speed, on the one hand common compound with equal hydraulic performance index
Pump（Driven by common AC asynchronous motor）Compare, the combination pump that permagnetic synchronous motor drives, not only the volume of motor can be more
It is small, and the pump housing, impeller can be obviously reduced after rotating speed raising, effectively reduce material cost, improve pump efficiency；The opposing party
Face, after rotating speed lifting, the performance of the speed variable combination pump that permagnetic synchronous motor drives can surmount common combination pump（By common
ACasynchronous motor drive）Normal performance boundary, particularly lift can be greatly improved, and be applicable more stringent user's ring
Border.
5）For the speed variable combination pump that permagnetic synchronous motor drives, motor is required for equipped with control panel pair in itself
Motor is driven and controls, when in the pump housing increase equipped with pressure sensor or water flow sensing unit when, the collection of sensor signal and
Treatment easily can be integrated on the control panel of motor very much, realize increasingly complex and intelligent control and function.
Brief description of the drawings
Fig. 1 is speed variable low noise self-priming combination pump overall structure diagram of the present invention.
Fig. 2 is speed variable low noise self-priming Compound pump spindle of the present invention to cross-sectional view.
Fig. 3 is water flow sensing unit part section structural representation of the present invention.
Reference：1st, it is combined pump intake；2nd, the pump housing；3rd, motor（Permagnetic synchronous motor）；4th, it is combined pump discharge；5th, spray
Mouth；6th, anemostat；7th, centrifugal impeller；8th, rotor；9th, motor stator；10th, intelligent motor control panel；11st, current（Or pressure
Power）Sensor.
Specific embodiment
In order that those skilled in the art more fully understand the technical scheme in the present invention, below in conjunction with the present invention
Accompanying drawing, clear, complete description is carried out to the technical scheme in invention, it is clear that described is only a real present invention part
Example is applied, rather than whole embodiments.Based on inventive embodiment, those of ordinary skill in the art are not making creative labor
The every other embodiment obtained under the premise of dynamic, should all belong to the scope of invention protection.
As illustrated, the technical solution adopted by the present invention is：A kind of speed variable low noise self-priming combination pump, including it is efficient
Energy-saving electric machine 3（Permagnetic synchronous motor）, intelligent motor control panel 10, the pump housing 2, centrifugal impeller 7, injector（By nozzle 5 and diffusion
Pipe 6 is constituted）, it is characterized by the motor 10 that the pump is used is permagnetic synchronous motor, it is divided into rotor 8；Motor stator 9 two
Point；The rotary shaft of motor（Rotor 8）It is connected with the centrifugal impeller 7 in the pump housing 2, the controlled motor of intelligent motor control panel 10 turns
Speed, current（Or pressure）The reception processing of the signal of sensor 11 and the triggering of control instruction, are easy to improve motor speed to be lifted
The lift of combination pump, flow, suction capacity and intelligent level；When being equipped with water flow sensing unit or pressure sensor, can pass through
Intelligent motor control panel 10 gathers pressure signal in water-flow signal and the pump housing, realizes the basic intelligence of " being started shooting with water, Guan Shui shuts down "
Can control, can further expand self-priming under " frequent starting ", constant pressure water supply and the optimized rotating speed solved when low discharge supplies water
The extension functions such as exhaust, pressure sensor is mountable to optional position in the pump housing, water flow sensing unit and can be installed on compound pumping into
In mouth 1, compound pump discharge 4 or the pump housing.
Using high efficiency motor speed variable the characteristics of, adjustment rotating speed can be actually needed according to water terminal, and then
Control flow and lift, the flow and pressure of stable water supply terminal；It is high, small volume excellent using the efficiency of motor used by the present invention 3
Point, can reduce the volume of combination pump, reduce rotor, the use of stator raw material, greatly improve mechanical efficiency, effectively reduce energy
Consumption；The characteristics of using high efficiency motor adjustable height rotating speed, on the one hand with the common combination pump of equal hydraulic performance index（By commonly handing over
Stream Induction Motor-Driven）Compare, the volume of the combination pump not only motor that permagnetic synchronous motor drives can be smaller, and rotating speed is carried
The pump housing, impeller can be obviously reduced after height, effectively reduce material cost, improve pump efficiency；On the other hand, rotating speed lifting
Afterwards, the performance of the speed variable combination pump that permagnetic synchronous motor drives can surmount common combination pump（By common alternating current asynchronous electricity
Machine drives）Normal performance boundary, particularly lift can be greatly improved, and be applicable more stringent user environment；High efficiency motor
Itself it is required for that motor is driven and controlled equipped with intelligent control board, is furnished with water flow sensing unit when increasing in the pump housing（Or pressure
Sensor）When, the collection and treatment of sensor signal easily can be integrated on the intelligent control board of motor very much, realized more
It is complicated and intelligence control and function.
Above-mentioned technical proposal makes speed variable low noise self-priming combination pump in intellectuality, efficiency, flow, lift, self-priming speed
The service behaviour of the aspects such as degree is obviously improved.
To sum up, the present invention is adjustable using the rotating speed of permagnetic synchronous motor, realizes that its flow lift can adjustment, constant pressure and constant
The multiple intelligent function such as water distribution manifold.On the basis of small-sized integrated cramped construction is ensured, further lifting is combined pump discharge, raises
The advantage performance such as journey, self-priming, while strengthening the applicability of combination pump, intellectuality, expanding its scope of application, further excavate market
Potentiality.
Specific embodiment of the invention is described above in association with accompanying drawing, but these explanations can not be understood to limitation
The scope of the present invention, protection scope of the present invention is limited by appended claims, any in the claims in the present invention base
Change on plinth is all protection scope of the present invention.
Claims (3)
1. speed variable low noise self-priming combination pump, it is characterised in that：Including the pump housing, centrifugal impeller, injector, its feature exists
In：The motor that the pump is used is permagnetic synchronous motor, and the rotary shaft of motor is connected with the centrifugal impeller in the pump housing, intelligent motor
Control panel controlled motor rotating speed；The self-priming combination pump also carries water flow sensing unit and/or pressure sensor；
Described pressure sensor is installed on the shunting pumping chamber in combination pump Nei or compound pump discharge, and it is used to detect combination pump
Interior pressure change triggers motor operation or stopping；Pressure sensor is connected with described intelligent motor control panel；
Described water flow sensing unit is installed on compound pump intake or outlet, its signal for being used to detect the current in combination pump, i.e.,
Whether the water in the pump housing flows to trigger motor operation or stopping；Water flow sensing unit is connected with described intelligent motor control panel.
2. speed variable low noise self-priming combination pump according to claim 1, it is characterised in that：Described centrifugal impeller with
Motor connects through shaft coupling.
3. speed variable low noise self-priming combination pump according to claim 1, it is characterised in that：The centrifugal impeller is many
Level impeller, its to configuration multi-stage path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710298179.7A CN106930950A (en) | 2017-04-30 | 2017-04-30 | Speed variable low noise self-priming combination pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710298179.7A CN106930950A (en) | 2017-04-30 | 2017-04-30 | Speed variable low noise self-priming combination pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106930950A true CN106930950A (en) | 2017-07-07 |
Family
ID=59436739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710298179.7A Pending CN106930950A (en) | 2017-04-30 | 2017-04-30 | Speed variable low noise self-priming combination pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106930950A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107859629A (en) * | 2017-12-27 | 2018-03-30 | 嘉禾福顺机械实业有限公司 | A kind of induction type is automatically turned off self priming pump |
| CN111878368A (en) * | 2020-09-01 | 2020-11-03 | 卡川尔流体科技(上海)有限公司 | Intelligent control diaphragm pump |
| CN112065728A (en) * | 2020-09-01 | 2020-12-11 | 厚力德机器（杭州）有限公司 | Dirt separation mixing-free jet self-suction device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203272162U (en) * | 2013-05-27 | 2013-11-06 | 余理超 | Full-automatic self-suction type centrifugal pump |
| CN103821727A (en) * | 2014-02-28 | 2014-05-28 | 浙江创美机电有限公司 | High-speed axial flow pump |
| CN103883535A (en) * | 2014-04-15 | 2014-06-25 | 钟灵宪 | Water pump controller |
| CN105736403A (en) * | 2016-04-29 | 2016-07-06 | 浙江创美机电有限公司 | Water-immersed submerged pump with permanent magnet synchronous motor |
| CN205559298U (en) * | 2016-04-18 | 2016-09-07 | 台州阳春机电有限公司 | Automatic jet pump |
| CN206071889U (en) * | 2016-09-09 | 2017-04-05 | 浙江新控泵业有限公司 | A kind of low noise self-priming combination pump |
| CN206681997U (en) * | 2017-04-30 | 2017-11-28 | 浙江新控泵业有限公司 | A kind of speed variable low noise self-priming combination pump |
-
2017
- 2017-04-30 CN CN201710298179.7A patent/CN106930950A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203272162U (en) * | 2013-05-27 | 2013-11-06 | 余理超 | Full-automatic self-suction type centrifugal pump |
| CN103821727A (en) * | 2014-02-28 | 2014-05-28 | 浙江创美机电有限公司 | High-speed axial flow pump |
| CN103883535A (en) * | 2014-04-15 | 2014-06-25 | 钟灵宪 | Water pump controller |
| CN205559298U (en) * | 2016-04-18 | 2016-09-07 | 台州阳春机电有限公司 | Automatic jet pump |
| CN105736403A (en) * | 2016-04-29 | 2016-07-06 | 浙江创美机电有限公司 | Water-immersed submerged pump with permanent magnet synchronous motor |
| CN206071889U (en) * | 2016-09-09 | 2017-04-05 | 浙江新控泵业有限公司 | A kind of low noise self-priming combination pump |
| CN206681997U (en) * | 2017-04-30 | 2017-11-28 | 浙江新控泵业有限公司 | A kind of speed variable low noise self-priming combination pump |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107859629A (en) * | 2017-12-27 | 2018-03-30 | 嘉禾福顺机械实业有限公司 | A kind of induction type is automatically turned off self priming pump |
| CN111878368A (en) * | 2020-09-01 | 2020-11-03 | 卡川尔流体科技(上海)有限公司 | Intelligent control diaphragm pump |
| CN112065728A (en) * | 2020-09-01 | 2020-12-11 | 厚力德机器（杭州）有限公司 | Dirt separation mixing-free jet self-suction device |
| CN112065728B (en) * | 2020-09-01 | 2022-07-05 | 厚力德机器（杭州）有限公司 | Dirt separation mixing-free jet self-suction device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20170707 |