CN208885544U - A kind of efficient invariable power low specific-speed immersible pump of intelligent frequency-conversion speed regulation - Google Patents
A kind of efficient invariable power low specific-speed immersible pump of intelligent frequency-conversion speed regulation Download PDFInfo
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- CN208885544U CN208885544U CN201820896429.7U CN201820896429U CN208885544U CN 208885544 U CN208885544 U CN 208885544U CN 201820896429 U CN201820896429 U CN 201820896429U CN 208885544 U CN208885544 U CN 208885544U
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Abstract
The utility model belongs to the combination of field of fluid machinery and field of intelligent control, specifically discloses a kind of efficient invariable power low specific-speed immersible pump of intelligent frequency-conversion speed regulation.The efficient invariable power low specific-speed immersible pump of intelligent frequency-conversion speed regulation monitors the input current of motor by built-in frequency converter, the revolving speed of adjustment motor in real time, it completely avoids because motor burnout problems, the No-mistake Principle for being truly realized immersible pump are run caused by overpower.At the same time, the heat dissipation problem solution of efficient Impeller Design scheme and internal control system and motor is proposed.
Description
Technical field
The utility model belongs to the combination of field of fluid machinery and field of intelligent control, is related to a kind of immersible pump, especially relates to
And be a kind of low specific-speed No-mistake Principle immersible pump for capableing of intelligent frequency-conversion, be mainly used for groundwater abstraction.
Background technique
In water pump field, specific speed is the important performance characteristic of pump.Low specific-speed immersible pump has metered flow small, specified
The high characteristic of lift, this causes its specific speed lower.Traditional low-specific-speed immersible pump is in use, usually appears in big
When flow rate working conditions shaft power it is excessive and the phenomenon that cause motor to burn.
No. 90214606.8 patents of existing patent " a kind of No-mistake Principle Low Specific Speed Centrifugal Pump Impellers ", 201010151477.1
Number patent " five operating condition point design methods of No-mistake Principle centrifugal pump impeller ", a kind of ZL200410014937.0 patent " low-specific-speed
Design method for centrifugal pump impeller " etc., the method optimized by Machine Design, carries out the No-mistake Principle characteristic of low specific-speed immersible pump
Optimization still has following problem although achieving apparent effect: 1, the cornerite of impeller is too big or mouth width out
Degree is too small, has higher requirement to the casting technique in production process.2, in order to optimize the No-mistake Principle characteristic of low specific-speed immersible pump,
In the design process of impeller, some important geometric parameter selections cause the efficiency of low specific-speed immersible pump lower.Because without mistake
There are certain to conflict between load characteristic and high-efficient characteristic, and traditional low specific-speed immersible pump is during improving No-mistake Principle characteristic
It only can not the solution of essence this conflict by the method for Optimum Hydraulic Design.
Summary of the invention
In order to fundamentally solve the problems, such as the No-mistake Principle of low specific-speed immersible pump, while realizing the efficient of No-mistake Principle immersible pump
Change.The utility model provides a kind of efficient invariable power low specific-speed immersible pump of intelligent frequency-conversion speed regulation.Intelligent frequency-conversion speed regulation
Efficient invariable power low specific-speed immersible pump monitors the input current of motor by built-in frequency converter, adjusts the revolving speed of motor in real time,
It completely avoids because motor burnout problems, the No-mistake Principle for being truly realized immersible pump are run caused by overpower.
The technical solution of the utility model is: the pump housing of immersible pump only has one stage impeller, and pressurized water chamber structure is spiral case, motor
For the built-in variable-frequency motor of frequency converter.
The technical solution of the utility model are as follows:
A kind of efficient invariable power low specific-speed immersible pump of intelligent frequency-conversion speed regulation, import are located at below the pump housing, and outlet is located at pump
Above body, including built-in frequency converter, variable-frequency motor, impeller, spiral case, pump cover, impeller are that single-stage impeller is placed in spiral case, spiral case
Lower section is equipped with pump cover,
Variable-frequency motor and motor part shell are installed above spiral case, built-in frequency converter is installed on the variable-frequency motor,
Built-in frequency converter is on built-in frequency converter pedestal, and built-in frequency converter pedestal is mounted on the shell of control section, outside control section
Shell and the sealing installation of motor part shell；
It is an entirety that circumscripted power line and built-in frequency converter and variable-frequency motor, which pass through control section connection,.
According to the inherent parameters of variable-frequency motor, constant power level when variable-frequency motor is run is set, according to constant power
The input current rated value of the operation of value setting variable-frequency motor, when extraneous plant-grid connection variable-frequency motor, first pass through built-in frequency converter,
The input current for the variable-frequency motor that built-in frequency converter real-time monitoring passes through, when input current is less than rated value, built-in frequency converter
The frequency of input power is increased, so that the revolving speed of variable-frequency motor increases, after variable-frequency motor revolving speed increase, the shaft power of water pump is just
It will increase, and then the load of variable-frequency motor is caused to increase, input current increases；When input current is higher than rated value, built-in change
Frequency device reduces the frequency of input power, so that the revolving speed of variable-frequency motor reduces, after variable-frequency motor revolving speed reduces, the shaft work of water pump
Rate will reduce, and then the load of variable-frequency motor is caused to reduce, and input current reduces；Pass through the negative of built-in frequency converter plug-in
Feed-back regulatory mechanism, variable-frequency motor will keep the state of output-constant operation.
Since water pump can be with intelligent speed-regulating, it is possible to run, can only be met with an impeller at higher rotational speeds
Lift demand, thus the impeller of its water pump only one, if traditional immersible pump will reach the stream of the intelligent frequency-conversion immersible pump
It measures lift parameter or using multilevel structure or the outer diameter of increase impeller, improves the No-mistake Principle of water pump using efficiency is sacrificed
Characteristic, this can all lead to the sufficiently bulky of pump portion.Moreover, different from traditional No-mistake Principle design, the waterpower of the impeller
The maximum of hydraulic efficiency is pursued in design, without consider to cause because of the Hydraulic Design shaft power so that caused by asking of burning of motor
Topic, in order to pursue the maximum of efficiency, compared with traditional Impeller Design, impeller inlet width is reduced, and impeller outlet is wide
Degree increased, and impeller blade exports laying angle and selects 25 ° -30 °, and this not only lowers the difficulty in production process, also greatly
The hydraulic efficiency for increasing immersible pump.
In the present invention, impeller inlet diameter is D0,
In formula, Q is metered flow, m3/h；D1For hub diameter, m；
Exit width is b2,
In formula, Q is metered flow, m3/h；D2For impeller outlet diameter, m；K is outlet coefficient, k=0.5~0.8.
The pumping chamber form of water pump is spiral case, and the seam allowance diameter of spiral case lower part is greater than impeller diameter, spiral case lower part and pump cover
Cooperated using seam allowance, and axially adjustable can make gap 0.5mm~1mm of pump cover and impeller.Shape between pump cover and impeller
It is the inlet sealing structure of " L " type at total body space cross sectional shape, not only there is preferable sealing function, more can effectively prevent
Only solid magazine entry impeller import seal clearance causes to wear.
Frequency converter pedestal uses aluminum alloy materials, and heat-transfer effect is good, and structure is cylindrical structure, circular cylinder radius R；Cylinder one
Side thickeies, and width L, L are equal to the width of single chip microcomputer circuit board in built-in frequency converter；Reinforcement with a thickness of
Between built-in frequency converter and built-in frequency converter pedestal and between built-in frequency converter pedestal and control section shell all
Using resin material blind.
The beneficial effects of the utility model are:
(1) the No-mistake Principle characteristic that low specific-speed immersible pump is realized by intelligent control is improved by the hydraulic engineering design of impeller
The efficiency of low specific-speed immersible pump, reduces the manufacture difficulty of low specific-speed submersible pump impeller, proposes motor and control unit
Heat sink conception, structure are relatively simple, it is easy to accomplish.
(2) immersible pump is usually and pulls the plug at work, and radiating condition is preferable, so traditional immersible pump does not have to generally
Consider the heat dissipation problem of motor, but the calorific value of the frequency-variable module of intelligent frequency-conversion immersible pump is very big, traditional radiating condition root
Originally it is unable to satisfy its cooling requirements, it is necessary to consider the heat dissipation problem of its motor and control module.So Intelligent submersible pump of the present invention
The structure being discharged using upper end, liquid medium can flow through the shell of motor and control module after spiral case outflow with high flow velocities,
Preferably cooling effect is provided.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is one embodiment of the present of invention；
Fig. 2 is the water pump magnified partial view of the embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the built-in frequency converter pedestal of the embodiment of the present invention；A- main view, b- top view；
In figure: 1. circumscripted power lines, frequency converter built in 2., frequency converter pedestal built in 3., 4. control section shells, 5. motors
Part enclosure, 6. variable-frequency motors, 7. impellers, 8. spiral cases, 9. pump covers, 10. inlet sealing structures.
Specific embodiment
Embodiment illustrated in fig. 1 is the efficient invariable power low specific-speed immersible pump of intelligent frequency-conversion speed regulation, including built-in frequency conversion
Device 2, variable-frequency motor 6, impeller 7, spiral case 8 and pump cover 9.It is the efficient invariable power low specific-speed diving of intelligent frequency-conversion speed regulation shown in Fig. 2
The water pump magnified partial view of pump cooperates the hydraulic structure of spiral case 8 using single-stage impeller 7, and the design of impeller 7 is without considering shaft power
Factor is up to target to pursue its hydraulic efficiency.
Impeller 7 is that single-stage impeller is placed in spiral case 8, and pump cover 9 is equipped with below spiral case 8, is equipped with frequency conversion above spiral case 8
Motor 6 and motor part shell 5, built-in frequency converter 2 is equipped on the variable-frequency motor 6, and built-in frequency converter 2 is mounted in built-in frequency conversion
On device pedestal 3, built-in frequency converter pedestal 3 is mounted on control section shell 4, and control section shell 4 and motor part shell 5 are close
Envelope installation；Circumscripted power line 1 and built-in frequency converter 2 and variable-frequency motor 6 pass through control section route 11 and are connected as an entirety；
It is 25 ° -30 ° that 7 blade exit laying angle of impeller, which selects section, and exit width is greater than common No-mistake Principle immersible pump (volume
It is qualitative can be identical, 7 inlet diameter of impeller is less than common No-mistake Principle immersible pump (rated performance is identical), the adjustment of these parameters can be with
The efficiency of low specific-speed immersible pump is greatly improved, specifically: 7 inlet diameter of impeller is D0,
In formula, Q is metered flow, m3/h；D1For hub diameter, m；
7 exit width of impeller is b2,
In formula, Q is metered flow, m3/h；D2For impeller outlet diameter, m；K is outlet coefficient, k=0.5~0.8.
One pump cover 9 is arranged at 8 lower part of spiral case, cooperates with the seam allowance of 8 lower part of spiral case, and the seam allowance diameter of 8 lower part of spiral case is greater than leaf
Take turns 7 diameters.The axial gap of pump cover 9 and impeller 7 is 0.5mm~1mm, and forming total body space cross sectional shape between the two is " L "
The inlet sealing structure 10 of type has preferable sealing performance, can reduce the volumetric loss of 7 entrance of impeller.
Shown in Fig. 1, circumscripted power line 1 and built-in frequency converter 2 and variable-frequency motor 6 pass through motor and control section route 11
It is connected as an entirety.Power supply accesses built-in frequency converter 2 first, has been incorporated into the program pre-set inside built-in frequency converter 2,
The core of the program is using motor input current as the negative-feedback regu- lation mechanism of monitoring objective: program setting variable-frequency motor 6
The input current rated value of operation, built-in frequency converter 2 monitor 6 input current of variable-frequency motor passed through, when input current is less than volume
When definite value, built-in frequency converter 2 increases the frequency of input power, so that the revolving speed of variable-frequency motor 6 increases, 6 revolving speed of variable-frequency motor
After increase, the shaft power of water pump just be will increase, and then the load of variable-frequency motor 6 is caused to increase, and input current increases.
When input current is higher than rated value, built-in frequency converter 2 reduces the frequency of input power, so that variable-frequency motor 6
Revolving speed reduce, 6 revolving speed of variable-frequency motor reduce after, the shaft power of water pump will reduce, and then the load of variable-frequency motor 6 is caused to subtract
Small, input current reduces.By the negative-feedback regu- lation mechanism of built-in 2 plug-in of frequency converter, variable-frequency motor 6 will keep invariable power
The state of operation, this can not only keep 6 motor of variable-frequency motor to remain at high efficient district fortune by setting electric current rated value
Row, more fundamentally solves the problems, such as that motor for submerged pump is easy overload burning.
In the electric pump course of work, the heat dissipation capacity of variable-frequency motor 6 and built-in 2 part of frequency converter will be very big, even if place
It is also not necessarily able to satisfy cooling requirements under water, therefore the efficient invariable power low specific-speed immersible pump of intelligent frequency-conversion speed regulation uses top
The structure of water outlet, the water flowed out from spiral case 8 are flowed through with biggish flow velocity along motor part shell 5 and control section shell 4, this
Variable-frequency motor 6 and the better heat dissipation performance of built-in frequency converter 2 will be supplied to.
Fig. 3 show the structural schematic diagram of built-in frequency converter pedestal 3, and a is main view, and b is top view, frequency converter pedestal 3
Using the preferable aluminum alloy materials of heat-transfer effect, structure is cylindrical structure, circular cylinder radius R；Cylinder side thickeies, width L,
L is equal to the width of single chip microcomputer circuit board in built-in frequency converter 2；Reinforcement with a thickness of
Between built-in frequency converter 2 and built-in frequency converter pedestal 3 and built-in frequency converter pedestal 3 and control section shell 4 it
Between all use resin material blind, to reach better heat-transfer effect.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent defines.
Claims (7)
1. a kind of efficient invariable power low specific-speed immersible pump of intelligent frequency-conversion speed regulation, which is characterized in that import is located at below the pump housing, out
Mouth is located above the pump housing, including built-in frequency converter (2), variable-frequency motor (6), impeller (7), spiral case (8) and pump cover (9), impeller (7)
It is placed in spiral case (8) for single-stage impeller, is equipped with pump cover (9) below spiral case (8), variable-frequency motor is installed above spiral case (8)
(6) and motor part shell (5) it, is equipped with built-in frequency converter (2) on the variable-frequency motor (6), built-in frequency converter (2) is mounted in interior
Set on frequency converter pedestal (3), built-in frequency converter pedestal (3) is mounted on control section shell (4), control section shell (4) and
Motor part shell (5) sealing installation；Circumscripted power line (1) and built-in frequency converter (2) and variable-frequency motor (6) pass through control unit
Separated time road (11) is connected as an entirety.
2. a kind of efficient invariable power low specific-speed immersible pump of intelligent frequency-conversion speed regulation as described in claim 1, which is characterized in that leaf
The blade exit laying angle of wheel (7) selects section for 25 ° -30 °.
3. a kind of efficient invariable power low specific-speed immersible pump of intelligent frequency-conversion speed regulation as described in claim 1, which is characterized in that leaf
The inlet diameter for taking turns (7) is D0It is b with exit width2It is respectively as follows:
Inlet diameter is D0,
In formula, Q is metered flow, m3/h；D1For hub diameter, m；
Exit width is b2,
In formula, Q is metered flow, m3/h；D2For impeller outlet diameter, m；K is outlet coefficient, k=0.5~0.8.
4. a kind of efficient invariable power low specific-speed immersible pump of intelligent frequency-conversion speed regulation as described in claim 1, which is characterized in that snail
Shell (8) lower part and pump cover (9) are cooperated using seam allowance, and the seam allowance diameter of spiral case (8) lower part is greater than impeller (7) diameter.
5. a kind of efficient invariable power low specific-speed immersible pump of intelligent frequency-conversion speed regulation as described in claim 1, which is characterized in that leaf
The axial gap for taking turns (7) and pump cover (9) is 0.5mm~1mm, formed between the two total body space cross sectional shape be " L " type into
Mouth sealing structure (10).
6. a kind of efficient invariable power low specific-speed immersible pump of intelligent frequency-conversion speed regulation as described in claim 1, which is characterized in that become
Frequency device pedestal (3) uses aluminum alloy materials, and structure is cylindrical structure, circular cylinder radius R；Cylinder side thickeies, width L, L etc.
The width of single chip microcomputer circuit board in built-in frequency converter (2)；Reinforcement with a thickness of
7. a kind of efficient invariable power low specific-speed immersible pump of intelligent frequency-conversion speed regulation as described in claim 1, which is characterized in that interior
It sets between frequency converter (2) and built-in frequency converter pedestal (3) and between built-in frequency converter pedestal (3) and control section shell (4)
All use resin material blind.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591080A (en) * | 2018-06-11 | 2018-09-28 | 江苏大学 | A kind of efficient invariable power low specific-speed immersible pump of intelligent frequency-conversion speed governing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591080A (en) * | 2018-06-11 | 2018-09-28 | 江苏大学 | A kind of efficient invariable power low specific-speed immersible pump of intelligent frequency-conversion speed governing |
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