CN202954985U - Energy-saving pump with low-voltage variable frequency speed controller replacing high-voltage motor variable frequency speed controller - Google Patents
Energy-saving pump with low-voltage variable frequency speed controller replacing high-voltage motor variable frequency speed controller Download PDFInfo
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- CN202954985U CN202954985U CN 201220518425 CN201220518425U CN202954985U CN 202954985 U CN202954985 U CN 202954985U CN 201220518425 CN201220518425 CN 201220518425 CN 201220518425 U CN201220518425 U CN 201220518425U CN 202954985 U CN202954985 U CN 202954985U
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Abstract
The utility model discloses an energy-saving pump with a low-voltage variable frequency speed controller replacing a high-voltage motor variable frequency speed controller. The energy-saving pump comprises a pump body and a high-voltage motor arranged on one side of an inlet of the pump; two groups of impellers are arranged in the pump body; the energy-saving pump is characterized in that one side of an outlet of the pump is provided with a low-voltage variable-frequency and variable-speed motor; the first group of the impeller is a fixed rotation speed impeller which is arranged at the inlet end of the pump and is connected with a high-voltage motor shaft of the high-voltage motor through a fixed rotation speed impeller pump shaft and rotates under the drive of the high-voltage motor; and the second group of the impeller is a variable speed impeller which is arranged at the outlet end of the pump, is connected with a motor shaft of a low-voltage variable-frequency and variable-speed motor through a variable speed impeller pump shaft and can rotate at different speed under the drive of the low-voltage variable-frequency and variable-speed motor, so that the flow of the pump can be adjusted. The low-voltage variable frequency speed controller which is low in cost replaces the high-voltage variable frequency speed controller, so that the problems of high price and function waste of the high-voltage variable frequency speed controller are solved; the energy-saving pump has the characteristics of saving energy, along with reasonable structure and good performance; and investment cost is greatly saved.
Description
Technical field
The utility model relates to a kind of energy-saving pump technical field, specifically a kind of novel energy-conserving pump that substitutes high voltage variable frequency speed regulator with low-pressure variable-frequency speed regulator.
Background technique
The motor that drags oil pump and water pump is the main power consumption facilities of industrial field such as petrochemical industry, thermoelectricity.For using electricity wisely, such motor has extensively adopted variable-frequency control technique, is used for regulating the flow of pump, constantly produces load with Adaptive change.At present, the low voltage motor variable-frequency control technique has been widely used in the Flow-rate adjustment of pump, has obtained obvious power savings.For example oil refinery adopts this technology, can make the motor power saving 20-30% that drags pump, part motor power saving 40-50%.The pump that high-voltage motor drags has also adopted the high-voltage motor variable-frequency control technique, has reached the power savings identical with low voltage motor.
But compare with low voltage frequency converter, the price of high voltage converter is about ten times of low frequency inverter.For example 150kW low voltage frequency converter price is about about 120,000 yuan, and the price of the high-voltage motor frequency variator of a 200kW is about more than 1,200,000, and frequency variator is bulky, and inconvenience is installed.Because the price of high voltage converter is more expensive, the turnover long (general 2--4), therefore many enterprises would rather allow high-voltage motor waste electric energy also be reluctant to invest Medium Voltage Variable Frequency Speed Regulation Technology.High-voltage motor quantity is lacked than low voltage motor, but total load the two is suitable, even the total load of high-voltage motor surpasses low voltage motor.
The working principle of variable-frequency control technique is the frequency that frequency variator changes electric current, the control motor speed, make motor speed 0 and maximum (top) speed between regulate as required.Because pump shaft is company with the axle of motor, impeller and the pump shaft of pump are linked togather, so the rotating speed of motor has determined the rotating speed of impeller.When motor speed was adjusted to maximum (top) speed by 0, the wheel speed that is dragged pump by motor also was adjusted to maximum by 0 synchronously, and the flow of pump also is adjusted to maximum by 0.Therefore by the motor variable-frequency speed-regulating technology, pump duty is consistent at any time, to reach the target of economize on electricity with producing required load.
When pump passes through a segment pipe with fluid, fluid is sent into an equipment (for example tower tank).Because in the equipment certain pressure is arranged, pipeline also has resistance.Therefore pump discharge pressure must overcome total resistance (the pressure sum of each road resistance and equipment), in the fluid ability access arrangement.For example: certain circulating water pump is sent water into a water tower, tower internal pressure 2.1MPa.Pump discharge pressure P=300m, water pump is dragged by the high-voltage motor of a power N=300kW.Be using electricity wisely, to high voltage variable frequency speed regulator on the high-voltage motor.When producing load and be reduced to zero by maximum, variable-frequency governor is regulated revolution speed by the highest during to minimum declines of rotating speed, and the rotating speed of pump cannot drop to zero.When rotating speed drops to a certain degree (such as rated speed 80%) time, when pump discharge pressure had dropped to 210m, pump discharge pressure just in time equaled the pressure 2.1MPa in the water tower, at this moment, pump capacity is reduced to zero.Can be found out that by upper art analysis the rotating speed of pump cannot drop to zero, the function major part of high voltage variable frequency speed regulator slatterns.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of energy-saving pump that replaces the high-voltage motor variable-frequency governor for the above-mentioned state of the art, reasonable in design, substitute high voltage variable frequency speed regulator with low-pressure variable-frequency speed regulator, thus the purpose that reaches energy-conservation, reduces cost.
The utility model solves the problems of the technologies described above the technological scheme that adopts: a kind of energy-saving pump that replaces the high-voltage motor variable-frequency governor, comprise the pump housing with pump intake and pump discharge, and the high-voltage motor that is arranged on pump intake one side, be provided with impeller in the pump housing, be respectively equipped with pump intake valve and pump discharge valve at pumping intake piping and pump discharge pipe, it is characterized in that: described pump discharge one side is provided with a low-voltage variable frequency speed-adjustable motor, described impeller is two groups, wherein first group of impeller is the fixed rotating speed impeller, be located at the pump intake end, link to each other with the high-tension electricity arbor of high-voltage motor by the fixed rotating speed impeller shaft, and under the driving of high-voltage motor, rotate; Second group of impeller is the speed governing impeller, is located at the pump discharge end, links to each other by the motor shaft of governor impeller axle with the low-voltage variable frequency speed-adjustable motor, makes speed change and rotate under the driving of low-voltage variable frequency speed-adjustable motor, and then regulate the flow of pump.
As improvement, described first group of impeller can be a slice impeller or multi-disc impeller, and its power accounts for 70 ~ 90% of pump total output; Described second group of impeller only has a slice impeller, and its power accounts for 10 ~ 30% of pump total output.
A kind of energy-saving pump that replaces the high-voltage motor variable-frequency governor, comprise the main pump with pump intake and pump discharge, and the high-voltage motor that is arranged on main pump inlet one side, be provided with impeller in the main pump, described impeller links to each other with the high-tension electricity arbor of high-voltage motor by main pump shaft, and under the driving of high-voltage motor, rotate, it is characterized in that: be connected with a Flow-rate adjustment pump for adjust flux on the outlet conduit at the pump discharge place of described main pump, the entrance of described Flow-rate adjustment pump is connected with the pump discharge of main pump, be provided with the speed governing impeller in the described Flow-rate adjustment pump, be provided with a low-voltage variable frequency speed-adjustable motor in Flow-rate adjustment delivery side of pump one side, described speed governing impeller links to each other with the motor shaft of low-voltage variable frequency speed-adjustable motor by the governor impeller axle, and makes speed change and rotate under the driving of low-voltage variable frequency speed-adjustable motor.
The impeller of described main pump is one or more pieces, and its power accounts for 70 ~ 90% of whole energy-saving pump total output; The speed governing impeller of described Flow-rate adjustment pump is a slice, and its power accounts for 10 ~ 30% of whole energy-saving pump total output.
Compared with prior art, the utility model has the advantage of: former pump structure is improved, one side arranges the low-voltage variable frequency speed-adjustable motor at the pump discharge place, and pump shaft also adopts two, respectively with high-voltage motor, the motor shaft of low-voltage variable frequency speed-adjustable motor links to each other, perhaps a pump is divided into main pump and regulates pump, the pump shaft of regulating pump links to each other with the motor shaft of low-voltage variable frequency speed-adjustable motor, so just replaced high voltage variable frequency speed regulator by low-pressure variable-frequency speed regulator cheaply, solved the price height that high voltage variable frequency speed regulator exists, the problem of function waste reaches energy-conservation purpose simultaneously.The utility model is rational in infrastructure, energy-efficient performance good, and has greatly saved cost of investment.
Description of drawings
Fig. 1 is the utility model energy-saving pump embodiment 1 structural representation;
Fig. 2 is the utility model energy-saving pump embodiment 2 structural representation;
Fig. 3 is the structural representation of comparative example before improving.
Embodiment
Embodiment is described in further detail the utility model below in conjunction with accompanying drawing.
The comparative example
Fig. 3 comprises the pump housing 1 and is arranged on the high-voltage motor 2 that pump intake one side drags the pump housing 1 for existing pump structure schematic representation before improving, and is provided with pump intake valve 6 at the pumping intake piping 12 of the pump housing 1, is provided with pump discharge valve 7 at pump discharge pipe 13; In the pump housing 1, be provided with successively first order impeller 3, second level impeller 4 and third level impeller 5 from pump intake to pump discharge, link to each other with impeller pump shaft 11a link to each other with the high-tension electricity arbor 21 of high-voltage motor 2, be saving power and adjust flux, be provided with supporting high voltage variable frequency speed regulator at high-voltage motor 2.High voltage variable frequency speed regulator not only cost is high, and when producing load and be reduced to zero by maximum, and high voltage variable frequency speed regulator is regulated revolution speed by the highest during to the minimum decline of rotating speed, and the rotating speed of pump cannot drop to zero.When dropping to a certain degree when rotating speed (such as rated speed 60～80%) time, pump discharge pressure has dropped to when equaling to pump the pipe resistance drop with equipment pressure sum, at this moment, pump capacity has been reduced to zero.Can be found out that by upper art analysis the rotating speed of pump cannot drop to zero, the function major part of high voltage variable frequency speed regulator slatterns.
As shown in Figure 1, a kind of energy-saving pump that replaces the high-voltage motor variable-frequency governor, comprise the pump housing 1 with pump intake and pump discharge, the low-voltage variable frequency speed-adjustable motor 8 that is arranged on the high-voltage motor 2 of pump intake one side and is located at pump discharge one side, be provided with successively first order impeller 3, second level impeller 4 and third level impeller 5 from pump intake to pump discharge in the pump housing 1, be respectively equipped with pump intake valve 6 and pump discharge valve 7 at pumping intake piping 12 and pump discharge pipe 13; Impeller is divided into two groups, wherein first order impeller 3 and second level impeller 4 form first group of impeller, the power of first group of impeller accounts for 70～90% of pump total output, the operation of employing fixed rotating speed, the fixed rotating speed impeller shaft 11 that is connected with first group of impeller links to each other with the high-tension electricity arbor 21 of high-voltage motor 2, with the driving of high-voltage motor 2; Third level impeller 4 is second group of impeller, the power of impeller accounts for 30～10% of pump total output, the governor impeller axle 14 that is connected with third level impeller 5 links to each other with the motor shaft 81 of low-voltage variable frequency speed-adjustable motor 8, driving by low-voltage variable frequency speed-adjustable motor 8, low-voltage variable frequency speed-adjustable motor 8 is provided with supporting low-pressure variable-frequency speed regulator, and then regulates the flow of pump.
Technological process is such: fluid (Ru Shui and oil) enters first order impeller 3 and the second level impeller 4 of fixed rotating speed through pump intake valve 6 and pumping intake piping 12, enter speed governing impeller-third level impeller 5 after going out second level impeller 4, the fluid that goes out third level impeller 5 enters pump discharge pipe 13 and pump discharge valve 7 again.
As shown in Figure 2, a kind of energy-saving pump that replaces the high-voltage motor variable-frequency governor, comprise main pump 1 with pump intake and pump discharge ', Flow-rate adjustment pump 9 and the high-voltage motor 2 that is arranged on pump intake one side, main pump 1 ' inlet duct 12 ' be provided with pump intake valve 6, main pump 1 ' in be provided with first order impeller 3 and second level impeller 4, the main pump shaft 11 that is connected with second level impeller 4 with first order impeller 3 ' link to each other with the high-tension electricity arbor 21 of high-voltage motor 2, by the driving of high-voltage motor; Flow-rate adjustment pump 9 be arranged on main pump 1 ' the outlet conduit of pump discharge 13 ' locate on, be used for adjust flux; The entrance 93 of Flow-rate adjustment pump 9 and main pump 1 ' pump discharge 13 ' be connected, the outer pipe 92 of Flow-rate adjustment pump 9 is provided with pump discharge valve 7, be provided with in the Flow-rate adjustment pump 9 one-level speed governing impeller 5 ', outlet one side at Flow-rate adjustment pump 9 is provided with a low-voltage variable frequency speed-adjustable motor 8, link to each other with the motor shaft 81 of low-voltage variable frequency speed-adjustable motor 8 with speed governing impeller 5 ' governor impeller axle 91 that is connected, and by the driving of low-voltage variable frequency speed-adjustable motor 8, low-voltage variable frequency speed-adjustable motor 8 is provided with supporting low-pressure variable-frequency speed regulator, and then regulates the flow of pump.
Below by concrete data the utility model is elaborated:
A conventional water pump that is dragged by high-voltage motor, water pump is comprised of three (level) impellers, and its parameter is as follows:
Pump capacity Q=200m
3/ h
The lift 100m of every impeller of pump discharge pressure P=300m
Water pump high-voltage motor power N=300kW
Water pump is sent water into a water tower, tower internal pressure 2.1MPa.
For using electricity wisely, pump need to adopt variable-frequency control technique to be used to regulate the flow of pump, as adopting Medium Voltage Variable Frequency Speed Regulation Technology, invests higher.For saving investment, adopt the utility model that this water pump is improved: pump parameter constant, pump structure are pressed this patent this water pump are implemented to improve.Improve afterwards operating mode: the high-voltage motor that is 200kW with a power drags two impellers that are in the pump intake place, and for reducing investment outlay, high-voltage motor does not adopt high voltage variable frequency speed regulator, so two impellers adopt the fixed rotating speed operation.In addition, the low voltage motor that is 100kW with a power drags a slice impeller that is in the pump discharge end, and this motor adopts low-pressure variable-frequency speed regulator, so the sheet impeller adopts variable-speed operation.Because the lift of every impeller is 100m, when high-voltage motor put into operation, second level impeller outlet pressure P=200m was close to water tower internal pressure 2.1MPa.Therefore, when third level wheel speed is zero, when namely low voltage motor did not put into operation, the water in the water pump sent less than in the water tower.At this moment, when the low-voltage variable frequency speed-adjustable motor being put into operation, low-pressure variable-frequency speed regulator adjustable water pump discharge pressure is zero at 200m(low voltage motor rotating speed again) when maximum to 300m(low voltage motor rotating speed) between operation, make the pump discharge flow 0 and 200m
3Press the automatic regulating water-quantity of need of production between the/h.
Before adopting the utility model, former pump high-voltage motor adopts high voltage converter to regulate pump capacity, about 1,200,000 yuan of investment price; After the improvement, about 50,000 yuan of the low voltage motor of a new upper 100kW, about 80,000 yuan of the low voltage frequency converter price of a 100kW adds up to 130,000 yuan.Both functions are identical, can reduce investment outlay 1,070,000 yuan.
Can draw to draw a conclusion from above-mentioned explanation: adopt low-pressure variable-frequency speed regulator to replace high voltage variable frequency speed regulator, reached equally the purpose of pump speed control economize on electricity, saved a large amount of investments.
Claims (4)
1. energy-saving pump that can replace the high-voltage motor variable-frequency governor, comprise the pump housing with pump intake and pump discharge, and the high-voltage motor that is arranged on pump intake one side, be provided with impeller in the pump housing, be respectively equipped with pump intake valve and pump discharge valve at pumping intake piping and pump discharge pipe, it is characterized in that: described pump discharge one side is provided with a low-voltage variable frequency speed-adjustable motor, described impeller is two groups, wherein first group of impeller is the fixed rotating speed impeller, be located at the pump intake end, link to each other with the high-tension electricity arbor of high-voltage motor by the fixed rotating speed impeller shaft, and under the driving of high-voltage motor, rotate; Second group of impeller is the speed governing impeller, is located at the pump discharge end, links to each other by the motor shaft of governor impeller axle with the low-voltage variable frequency speed-adjustable motor, makes speed change and rotate under the driving of low-voltage variable frequency speed-adjustable motor, and then regulate the flow of pump.
2. energy-saving pump according to claim 1 is characterized in that described first group of impeller is a slice impeller or multi-disc impeller, adopts the fixed rotating speed operation, and its power accounts for 70～90% of pump total output; Described second group of impeller is a slice impeller, adopts variable-speed operation, and its power accounts for 10～30% of pump total output.
3. energy-saving pump that can replace the high-voltage motor variable-frequency governor, comprise the main pump with pump intake and pump discharge, and the high-voltage motor that is arranged on main pump inlet one side, be provided with impeller in the main pump, described impeller links to each other with the high-tension electricity arbor of high-voltage motor by main pump shaft, and under the driving of high-voltage motor, rotate, it is characterized in that: be connected with a Flow-rate adjustment pump for adjust flux on the outlet conduit at the pump discharge place of described main pump, the entrance of described Flow-rate adjustment pump is connected with the pump discharge of main pump, be provided with the speed governing impeller in the described Flow-rate adjustment pump, be provided with a low-voltage variable frequency speed-adjustable motor in Flow-rate adjustment delivery side of pump one side, described speed governing impeller links to each other with the motor shaft of low-voltage variable frequency speed-adjustable motor by the governor impeller axle, and makes speed change and rotate under the driving of low-voltage variable frequency speed-adjustable motor.
4. energy-saving pump according to claim 3 is characterized in that the impeller of described main pump is one or more pieces, and its power accounts for 70～90% of whole energy-saving pump total output; The speed governing impeller of described Flow-rate adjustment pump is a slice, and its power accounts for 10～30% of whole energy-saving pump total output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220518425 CN202954985U (en) | 2012-10-09 | 2012-10-09 | Energy-saving pump with low-voltage variable frequency speed controller replacing high-voltage motor variable frequency speed controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220518425 CN202954985U (en) | 2012-10-09 | 2012-10-09 | Energy-saving pump with low-voltage variable frequency speed controller replacing high-voltage motor variable frequency speed controller |
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| Publication Number | Publication Date |
|---|---|
| CN202954985U true CN202954985U (en) | 2013-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220518425 Expired - Lifetime CN202954985U (en) | 2012-10-09 | 2012-10-09 | Energy-saving pump with low-voltage variable frequency speed controller replacing high-voltage motor variable frequency speed controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103711709A (en) * | 2012-10-09 | 2014-04-09 | 雷泽永 | Energy-saving pump utilizing low-voltage variable-frequency governor instead of high-voltage variable-frequency governor |
-
2012
- 2012-10-09 CN CN 201220518425 patent/CN202954985U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103711709A (en) * | 2012-10-09 | 2014-04-09 | 雷泽永 | Energy-saving pump utilizing low-voltage variable-frequency governor instead of high-voltage variable-frequency governor |
| CN103711709B (en) * | 2012-10-09 | 2016-07-06 | 雷泽永 | A kind of energy-saving pump that may replace high-voltage motor variable-frequency governor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130529 Effective date of abandoning: 20160706 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |