EP3821131A1 - Zentrifugalpumpe - Google Patents
ZentrifugalpumpeInfo
- Publication number
- EP3821131A1 EP3821131A1 EP19834912.8A EP19834912A EP3821131A1 EP 3821131 A1 EP3821131 A1 EP 3821131A1 EP 19834912 A EP19834912 A EP 19834912A EP 3821131 A1 EP3821131 A1 EP 3821131A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- inlet
- centrifugal pump
- ejector device
- pump according
- 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.)
- Withdrawn
Links
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
- F04D29/40—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
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0027—Varying behaviour or the very pump
-
- 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
- F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
-
- 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
- F04D29/4293—Details of fluid inlet or outlet
-
- 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
- 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
- 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
-
- 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
- F05D2260/00—Function
- F05D2260/60—Fluid transfer
- F05D2260/601—Fluid transfer using an ejector or a jet pump
Definitions
- the invention relates to the field of the machine-building industry, in particular to the vane pumps for supplying water for domestic or industrial purposes.
- Centrifugal pumps with a jet ejector device that provides pump start up and self-suction while running are known.
- centrifugal pumps with jet ejector device SU 108211, SU 234868, SU 1021819, US 2484105, US 2524770, EP 0401670, EP 0361329 are known.
- centrifugal pump has a fixed head-capacity curve which is the main aspect when choosing a pump for the water supply system.
- head-capacity curve which is the main aspect when choosing a pump for the water supply system.
- the most optimal selection of the pump does not exclude pressure drops at varying output, due to the inverse relationship of these parameters in the centrifugal pump. In actual practice, this results in deviations from the comfortable pressure value when opening or closing additional water points (sink and shower taps, etc.) and necessitates manual control of the comfort mode.
- the closest analogous solution to the claimed device is a centrifugal pump containing the shaft-mounted impeller in the housing, inlet and discharge chambers of the pumped medium, as well as a jet ejector device with an inlet channel for supplying the pumped medium from the inlet chamber to the impeller, and with the inlet operating nozzle installed in alignment with the above inlet channel and connected to the discharge chamber with its own inlet, as well as the valve made with the seat and the spring-mounted and membrane-fixed shut-off control element for regulating the flow of the pumped medium injected through the nozzle of the ejector device (SU 108211, prototype).
- the disadvantageous feature of the closest analogue is the large size and weight, as well as the significant dependence of the pressure generated by the pump on the flow rate of the pumped medium that changes the fluid intake regime when changing the consumption by consumers and thereby worsens the water supply conditions of consumers.
- the technical problem of the present invention consists in the development of a compact centrifugal pump capable of maintaining a pressure in a stable compressed range within a comfortable range at the changing flow rate certain and characteristic for a particular water supply system, as well as widening of the range of centrifugal pumps.
- the technical result that allows solving the above problem is to reduce the slope of the pump head-capacity curve in a wide range of flow values, and the pump size and weight due to optimal scale integration in one device.
- Figure 1 shows the cross section of JUMBO COMFORT centrifugal pump
- Figure 2 the left-side view of Figure 1
- Figure 3 the cross section of the centrifugal pump in axonometric projection
- Fgure 4 the head-capacity curves of two standard sizes of the pump claimed
- Figure 5 the left-side view of the built- in ejector
- Figure 6 the cross section of the built-in ejector
- Figure 7 - axonometric projection of the built-in ejector.
- the centrifugal pump contains the shaft-mounted impeller 6 in the housing 2, inlet chamber 11 and discharge chamber 10 of the pumped medium, as well as a jet ejector device with an inlet channel 12 for supplying the pumped medium from the inlet chamber 11 to the impeller 6, and with the inlet operating nozzle 13 installed in alignment with the above inlet channel 12 and connected to the discharge chamber 10 with its own inlet, as well as the valve made with the seat 24 and the spring-mounted and membrane 21 fixed shut-off control element 22 for regulating the flow of the pumped medium injected through the nozzle 13 of the ejector device.
- the impeller 6 contains two disks between which the blades (not shown) of a special form are fixed: they are curved in the direction opposite to the direction of the impeller 6 rotation.
- the inlet chamber 11 is equipped with the inlet fitting 17, the discharge chamber 10 is connected to the outlet fitting 18.
- the bypass channel 14 is made hydraulically parallel to the nozzle 13 of the ejector device.
- the ejector device is equipped with the tube 3 placed in the discharge chamber 10 inside which the inlet channel 12 is arranged connected to the inlet fitting 17.
- the valve i.e. its shut-off control element 22
- the flow-type control cavity 16 is formed on one side by the above membrane 21 and connected to the discharge chamber 10 with several flow-type through holes 15 made in the housing 2, and to the inlet nozzle 13 of the ejector device - with several flow-type through holes 25.
- the valve seat 24 is made on the edge of the bypass channel 14 facing the control cavity 16 with the possibility of interaction with the shut-off control element 22 when the latter moves together with the membrane 21.
- the tube 3 of the ejector device from the side of the nozzle 13 is made with the groove 26 connected with its bypass channel 14 in which the nozzle 14 is placed, and the inlet channel 12 is made in the form of a cone diffuser.
- the shut-off control element 22 of the valve is made of brass, loaded with the compression coil spring 23 mounted in the removable cover 20 of the housing and supported through the washer (not indicated) on the membrane 21.
- the shut-off control element 22 is provided with the integral brass rod (not indicated) installed in the guide 27 made integral with the removable cover 20 fixed with the screws 19.
- the shut-off control element 22 of the valve is made with the spherical working surface to interact with the seat 24.
- the valve seat 24 is made cone-shaped.
- the saddle 24 is made of brass and cast as an embedded part when casting the housing 2.
- the bypass channel 14 is made composite of two bushings (not indicated), one of which is made integral (in one forging part 28) with the nozzle 13, and the other - aligned hole of the housing 2 with the valve seat 24.
- the impeller 6 is equipped with the guide vane 4 enclosed in the housing 2 with the base 5 separating the fluid end of the pump from the electric motor.
- the ejector device on the side opposite to the nozzle 13 is made with the band 29 for mounting the guide vane 4 on it.
- the fluid end is full plastic, made of polypropylene which is a thermoplastic polymer of propylene (propene).
- Polypropylene is obtained by polymerizing propylene in the presence of metal complex catalysts,
- the tube 3 and the ejector device part 28 are connected by ultrasonic welding for which purpose the part 28 has a protrusion (see Fig. 6) of the annular shape (not indicated) along the perimeter of the joint with the tube 3; the protrusion is interfused in the annular groove (not indicated) of the part (tube) 3 when exposed to high frequency ultrasonic vibrations by the special-purpose equipment.
- this ensures the compactness of the device as a whole and its minimum weight compared with products of the same designation.
- the centrifugal pump is completed with the automatic control unit 7 connected to the discharge chamber 10; the unit is attached to the pump housing 2 with the use of the connecting fitting 9 and fixed with the coupling nut 8, while the angle of the outlet fitting 18 relative to the pump axis (and the inlet fitting 17) can be arbitrary that provides additional convenience during installation.
- the connecting fitting 9 is connected to the high pressure chamber 10 of the pump.
- the centrifugal pump has the electric motor 1 mounted in alignment with the impeller 6.
- the centrifugal pump operates as follows.
- the housings are completely filled with water.
- the liquid medium flow significantly accelerates that contributes to forming vacuum - decreased pressure area in the channel 12 of the pump suction side.
- the pressure decreases, and water flows there from the source - reservoir, well, hole, etc. through the inlet fitting 17, the chamber 11, and the channel 12. As a result, the fluid is supplied without interruption.
- the automatic control unit 7 is an independent device and, when working with the proposed pump, it is designed for connecting the pump to the power supply when consuming water and disconnecting when not consuming; it prevents the pump from turning on when there is no water.
- the pump shutdown is determined by reducing the consumed output to the minimum value with a delay of 7-15 seconds. Subsequent starts up of the pump are performed by the unit 7 when the starting pressure is reached, after opening the tap.
- the claimed automatically operated pump under the name JUMBO COMFORT with the built-in control valve allows to maintain the pressure value within a comfortable range at the changing flow rate certain and characteristic for a particular water supply system.
- Pressure adjustment (maintaining the optimal head-capacity curve) of the pump within a comfortable range allows to stabilizing the mode of fluid consumption when changing the consumption by the consumers, i.e. avoid pressure drops when simultaneously opening and closing several points of water discharge.
- the head of two standard sizes“60/35 comfort” and “70/50 comfort” of the claimed pump JUMBO COMFORT varies in the operating flow range up to 40 1/min within not more than 10 m, as opposed to the usual pump configuration "60/35" and "70/50".
- valve embedded in the cavity 16 which regulates the flow ratio in the bypass channel 14 and the nozzle 13 which operates as follows.
- the pressure developed by the pump in the chamber 10 is monitored by the membrane 21 as the cavity 16 on the one side of the membrane 21 is connected by the holes 15 in the housing 2 to the discharge (high pressure) chamber 10.
- the force of the spring 23 acts on the membrane 21.
- the rod of the shut-off control element 22 is rigidly attached to the membrane 21 which, under the action of the spring 23, on the one hand, and the force of the pressure acting on the membrane 21 in the cavity 16, on the other hand, changes the flow area between the spherical surface of the shut-off control element 22 and the cone surface of the seat 24 (the valve opens or closes).
- the pump sizes and weight are reduced due to the optimal scale integration of the valve and the nozzle, while the head changes insignificantly, as the slope of the pump head-capacity curve in the most used operating range of flow values is significantly reduced.
- the present invention is embodied with multipurpose equipment extensively employed by the industry.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2018125187A RU2683062C1 (ru) | 2018-07-10 | 2018-07-10 | Центробежный насос |
PCT/RU2019/000331 WO2020013729A1 (en) | 2018-07-10 | 2019-05-13 | Centrifugal pump |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3821131A1 true EP3821131A1 (de) | 2021-05-19 |
EP3821131A4 EP3821131A4 (de) | 2022-03-30 |
Family
ID=65858704
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19834912.8A Withdrawn EP3821131A4 (de) | 2018-07-10 | 2019-05-13 | Zentrifugalpumpe |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3821131A4 (de) |
EA (1) | EA038211B1 (de) |
RU (1) | RU2683062C1 (de) |
WO (1) | WO2020013729A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112555137A (zh) * | 2020-12-14 | 2021-03-26 | 宁波君禾智能科技有限公司 | 水泵控制系统 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2435053A (en) * | 1944-08-05 | 1948-01-27 | Shasta Pump Company | Valve and air charger for pumpstorage systems |
US2524770A (en) * | 1945-05-11 | 1950-10-10 | F E Myers & Bro Company | Centrifugal ejector pump |
US2457388A (en) * | 1945-06-27 | 1948-12-28 | Flint & Walling Mfg Co Inc | Injector-impeller pump |
US2484105A (en) | 1945-11-13 | 1949-10-11 | Mcdonald Mfg Co A Y | Ejector pump |
US2630069A (en) * | 1946-05-20 | 1953-03-03 | Thaddeus S Harris | Automatic control unit for deep well jet pumps |
SU108211A1 (ru) * | 1956-11-29 | 1956-11-30 | В.В. Иванов | Самовсасывающий центробежный насос |
DE2504292A1 (de) * | 1975-02-01 | 1976-08-05 | Ewald Bous | Automatischer pumpendruck-bypass- regler |
IT1225596B (it) | 1988-09-26 | 1990-11-22 | Calpeda A Spa | Pompa autoadescante ad eiettore. |
IT1234116B (it) | 1989-06-07 | 1992-04-29 | Novax S R L | Pompa centrifuga autoadescante. |
IT1257704B (it) * | 1991-12-05 | 1996-02-01 | Nocchi Pompe Spa | Pompa per acqua plurifunzionale: centrifuga, per aspirazione profonda,autoadescante, centrifuga con regolazione di pressione, autoadescante con regolazione di pressione, con dispositivo di avviamento e/0 arresto automatico |
DE9314532U1 (de) * | 1993-09-25 | 1993-12-09 | Stuebbe Asv Gmbh | Selbstansaugende Kreiselpumpe |
CN101644272A (zh) * | 2009-07-20 | 2010-02-10 | 江苏大学 | 一种快速自吸的射流式离心泵 |
CN102734177A (zh) * | 2012-06-08 | 2012-10-17 | 李冬庆 | 一种直联式自吸泵 |
-
2018
- 2018-07-10 RU RU2018125187A patent/RU2683062C1/ru active
-
2019
- 2019-05-13 EP EP19834912.8A patent/EP3821131A4/de not_active Withdrawn
- 2019-05-13 EA EA202000217A patent/EA038211B1/ru unknown
- 2019-05-13 WO PCT/RU2019/000331 patent/WO2020013729A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
EA038211B1 (ru) | 2021-07-23 |
EA202000217A1 (ru) | 2020-10-20 |
RU2683062C1 (ru) | 2019-03-26 |
WO2020013729A1 (en) | 2020-01-16 |
EP3821131A4 (de) | 2022-03-30 |
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Inventor name: YAZYKOV, ANDREY YURIEVICH |
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A4 | Supplementary search report drawn up and despatched |
Effective date: 20220302 |
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