CN110210158B - Transformation method of energy-saving water pump - Google Patents
Transformation method of energy-saving water pump Download PDFInfo
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- CN110210158B CN110210158B CN201910499288.4A CN201910499288A CN110210158B CN 110210158 B CN110210158 B CN 110210158B CN 201910499288 A CN201910499288 A CN 201910499288A CN 110210158 B CN110210158 B CN 110210158B
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Abstract
The invention discloses a reconstruction method of an energy-saving water pump, which comprises the steps of setting a water pump running curve and parameters, defining flow as Q, a lift curve H and an efficiency curve eta: on-site actual operation flow-lift curve parameter value definitionIs the actual parameter point A; optimizing various specific rotation speed hydraulic models, establishing an excellent hydraulic model library, selecting an excellent hydraulic model according to an actual operation parameter point A on site, and customizing the highest efficiency eta of a flow-efficiency curve Q-eta by designing an efficient energy-saving water pump or impeller according to the actual operation parameter point A max Completely coincides with the parameter point a. The offset working condition operation of the water pump is solved, the coincidence of the design point and the actual needed working condition point is met, the coincidence of the highest efficiency point and the working condition point of the water pump is ensured, and meanwhile, no additional device is added, so that the water pump is safe and reliable.
Description
Technical Field
The invention relates to an energy-saving water pump sizing technology, in particular to a modification method of an energy-saving water pump.
Background
At present, the energy-saving reconstruction technology of the water pump mainly comprises 3 types:
1. according to the actual working conditions (flow and lift) of the site, the existing water pump model is selected. Generally, the flow and the lift of the existing water pump model often do not meet the required flow and lift, and the requirement can be met only by enlarging or cutting the diameter of the impeller, so that the efficiency of the water pump with the enlarged or cut impeller diameter can be reduced. Or the flow and the lift can meet the working condition requirements, but do not coincide with the highest efficiency point of the pump.
2. The performance of the pump is changed to meet the working condition requirement by changing the rotating speed of the water pump, such as variable frequency, a permanent magnet speed regulator, a coupler and other speed regulating equipment. Disadvantages: the added speed regulating equipment also consumes energy, and the change of the rotating speed can reduce the efficiency of the pump, and often does not coincide with the highest efficiency point of the pump.
3. The adjusting device, such as an energy-saving control valve, is added, and the pump is operated in a high-efficiency area by changing the lift of the device, so that the purpose of correcting the working condition is achieved. Disadvantages: the regulating device itself also consumes energy, increasing the safety hazard of the device system.
Disclosure of Invention
The invention aims to provide a reconstruction method of an energy-saving water pump, which effectively solves the technical problems.
In order to effectively solve the technical problems, the technical scheme adopted by the invention is as follows:
a method of retrofitting an energy efficient water pump, the method comprising the steps of:
(1) Setting a water pump running curve and parameters, defining flow as Q, a lift curve H and an efficiency curve eta:
(2) The on-site actual running flow-lift curve parameter value is defined as an actual parameter point A;
(3) Optimizing various specific rotation speed hydraulic models, establishing an excellent hydraulic model library, and according to actual operation parameter points on siteA, selecting an excellent hydraulic model, customizing the highest efficiency eta of a flow-efficiency curve Q-eta by designing the high-efficiency energy-saving water pump or impeller according to the actual running parameter point A max Completely coincides with the parameter point a.
In particular, the method further comprises the steps of:
setting a device curve h=kq 2 Flow-head curve and device curve h=kq 2 Intersecting at point a.
In particular, the method further comprises the steps of:
setting the highest efficiency point eta of the flow-efficiency curve max Distant from the actually required point a by Δq, when Δq=0, η max Coinciding with the parameter point a.
The beneficial effects of the invention are as follows: the reconstruction method of the energy-saving water pump solves the problem that the water pump runs in a bias working condition, meets the requirement that the design point coincides with the actual working condition point, ensures that the highest efficiency point of the water pump coincides with the working condition point, and is safe and reliable without adding any additional device.
The present invention will be described in detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention.
Detailed Description
Example 1:
the following examples are given to illustrate possible embodiments of the present invention, but are not intended to limit the scope of the invention.
Referring to fig. 1, which shows a first preferred embodiment of the present patent, a method for retrofitting an energy-saving water pump, the method comprising the steps of:
(1) Setting a water pump running curve and parameters, defining flow as Q, a lift curve H and an efficiency curve eta:
(2) The on-site actual running flow-lift curve parameter value is defined as an actual parameter point A;
(3) Optimizing various specific rotation speed hydraulic models, establishing an excellent hydraulic model library, selecting excellent hydraulic models according to the on-site actual operation parameter point A, and customizing the high-efficiency energy-saving water pumpOr the impeller is designed with the parameter point A of actual operation, and the highest efficiency eta of the flow-efficiency curve Q-eta max Completely coincides with the parameter point a.
Setting a device curve h=kq 2 Flow-head curve and device curve h=kq 2 Intersecting at point a. Setting the highest efficiency point eta of the flow-efficiency curve max Distant from the actually required point a by Δq, when Δq=0, η max Coinciding with the parameter point a.
The applicant declares that, on the basis of the above examples, a new method is produced by combining certain steps of the above examples with the technical solutions of the summary of the invention, which is one of the described ranges of the present invention, and the present application does not list other implementations of these steps for conciseness of the specification.
The specific principle is as follows:
as shown in fig. 1, the performance curve of the existing water pump model is: flow-head curve Q 1 -H 1 Flow-efficiency curve Q 1 -η 1 (see the figure) whereas the actual operating parameter points a (Q, H) in the field, the flow-lift curve cannot be matched with the device curve h=kq 2 Intersecting at point a. The existing water pump can only cut or reduce the rotating speed by the impeller to lead the flow-lift curve Q 2 -H 2 And device curve h=kq 2 Intersecting at point a. But no matter the flow-efficiency curve Q of the water pump before cutting 1 -η 1 Maximum efficiency point eta of (2) 1max From the actually required point A by DeltaQ 1 Or the flow-efficiency curve Q of the water pump after impeller cutting or rotating speed reduction 2 -η 2 Maximum efficiency point eta of (2) 2max From the actually required point A by DeltaQ 2 It is difficult to reach the highest efficiency point eta max And is coincident with A.
The modification technology of the high-efficiency energy-saving water pump with customized fit is to optimize various specific rotation speed hydraulic models, establish an excellent hydraulic model library, select an excellent hydraulic model according to the actual operation parameter points A (Q, H) on site, design the high-efficiency energy-saving water pump or impeller with the actual operation parameter points A (Q, H), and the highest efficiency eta of the flow-efficiency curve Q-eta max And parameter points A (Q, H) are completedAnd (5) full superposition.
The applicant has further stated that the present invention is described by the above examples as to the implementation method and apparatus structure of the present invention, but the present invention is not limited to the above embodiments, i.e. it does not mean that the present invention must be implemented by the above methods and structures. It should be apparent to those skilled in the art that any modification of the present invention, equivalent substitutions for the implementation method selected by the present invention, addition of steps, selection of specific modes, etc., fall within the scope of the present invention and the scope of the disclosure.
The present invention is not limited to the above embodiments, and all embodiments using structures similar to the present invention and methods for achieving the objects of the present invention are within the scope of the present invention.
Claims (3)
1. The reconstruction method of the energy-saving water pump is characterized by comprising the following steps of:
(1) Setting a water pump running curve and parameters, defining flow as Q, a lift curve H and an efficiency curve eta:
(2) The on-site actual running flow-lift curve parameter value is defined as an actual parameter point A;
(3) Optimizing various specific rotation speed hydraulic models, establishing an excellent hydraulic model library, selecting an excellent hydraulic model according to an actual operation parameter point A on site, and customizing the highest efficiency eta of a flow-efficiency curve Q-eta by designing an efficient energy-saving water pump or impeller according to the actual operation parameter point A max Completely coincides with the parameter point a.
2. The method for retrofitting an energy efficient water pump of claim 1 further comprising the steps of:
setting a device curve h=kq 2 Flow-head curve and device curve h=kq 2 Intersecting at point a.
3. The method for retrofitting an energy efficient water pump of claim 1 further comprising the steps of:
setting the highest of the flow-efficiency curvesEfficiency point eta max Distant from the actually required point a by Δq, when Δq=0, η max Coinciding with the parameter point a.
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| CN102086884A (en) * | 2010-04-19 | 2011-06-08 | 江苏大学 | Four working condition-point hydraulic design method of impeller of centrifugal pump |
| CN102691339A (en) * | 2012-06-06 | 2012-09-26 | 长沙瑞泽能源科技有限公司 | Energy-saving reforming method for water pumps of water supply system |
| CN103742425A (en) * | 2014-01-22 | 2014-04-23 | 江苏双轮泵业机械制造有限公司 | Energy conservation correcting method for water circulation system |
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| US7686589B2 (en) * | 2004-08-26 | 2010-03-30 | Pentair Water Pool And Spa, Inc. | Pumping system with power optimization |
| CN102200121B (en) * | 2010-03-25 | 2013-07-17 | 上海乐普能源科技发展有限公司 | Electricity-saving control system leading water pump to run at optimum revolution |
| CN201843787U (en) * | 2010-10-25 | 2011-05-25 | 烟台鑫海耐磨胶业有限公司 | High-lift rubber pump |
| CN101956710B (en) * | 2010-10-27 | 2012-05-23 | 江苏大学 | Method for hydraulically optimizing centrifugal pump under working conditions based on loss |
| CN102518946B (en) * | 2012-01-09 | 2013-03-27 | 浙江科维节能技术股份有限公司 | Energy saving method for cooling water circulation system |
| CN104141603B (en) * | 2014-06-24 | 2016-06-29 | 赛莱默(中国)有限公司 | There is the control system of water pump of energy-conserving action |
| CN104314840A (en) * | 2014-10-29 | 2015-01-28 | 大连爱特流体控制有限公司 | Sensorless self-frequency intelligent water pump distribution system |
| CN106126761A (en) * | 2015-05-08 | 2016-11-16 | 江苏尚宝罗泵业有限公司 | A kind of Optimization Design of efficient papermaking process flow pump |
| JP6436408B1 (en) * | 2018-02-15 | 2018-12-12 | 有限会社北沢技術事務所 | Pump flow measurement device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102086884A (en) * | 2010-04-19 | 2011-06-08 | 江苏大学 | Four working condition-point hydraulic design method of impeller of centrifugal pump |
| CN102691339A (en) * | 2012-06-06 | 2012-09-26 | 长沙瑞泽能源科技有限公司 | Energy-saving reforming method for water pumps of water supply system |
| CN103742425A (en) * | 2014-01-22 | 2014-04-23 | 江苏双轮泵业机械制造有限公司 | Energy conservation correcting method for water circulation system |
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