CN212838565U - Anti-steam-bound cavitation erosion high-speed centrifugal pump in limited space - Google Patents
Anti-steam-bound cavitation erosion high-speed centrifugal pump in limited space Download PDFInfo
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- CN212838565U CN212838565U CN202021836356.6U CN202021836356U CN212838565U CN 212838565 U CN212838565 U CN 212838565U CN 202021836356 U CN202021836356 U CN 202021836356U CN 212838565 U CN212838565 U CN 212838565U
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- impeller
- backflow hole
- centrifugal pump
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- 230000003628 erosive effect Effects 0.000 title claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 abstract description 33
- 239000007788 liquid Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
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Abstract
The application provides an anti vapour in finite space ties up cavitation high-speed centrifugal pump belongs to the mechanical equipment field. The pump comprises a pump body, wherein the pump body is hollow and is provided with an inlet and an outlet; the impeller is rotatably arranged in the inner cavity of the pump body; the impeller is provided with a plurality of blades, each blade is provided with a first backflow hole and a second backflow hole, the diameter of the first backflow hole is larger than that of the second backflow hole, the distance from the first backflow hole to the center of the impeller is smaller than that from the second backflow hole to the center of the impeller, and a connecting line between three points of the circle center of the first backflow hole, the circle center of the second backflow hole and the center of the impeller on the same blade is a triangle; the driving end of the motor is in transmission connection with the impeller through a transmission shaft and is used for driving the impeller to rotate in the inner cavity of the pump body. The steam-bound cavitation erosion-resistant device is compact in structure, small in occupied space, reliable in structure, high in efficiency, simple and convenient to install, ingenious in design, capable of effectively solving the steam-bound cavitation phenomenon, effectively reducing loss of fluid to a machine body and saving cost.
Description
Technical Field
The application relates to the field of mechanical equipment, in particular to a steam-bound cavitation-resistant high-speed centrifugal pump in a limited space.
Background
The pump is a widely used general purpose machine, and it can be said that there is essentially a pump in operation where all liquid flows. In addition, the field of application of the pump is rapidly expanding with the development of scientific technology. According to the statistics of various countries, the power consumption of the pump machinery accounts for 20% of the total power generation amount of the country, and the pump consumes huge energy. Therefore, the improvement of the technical level of the pump has important significance for saving energy consumption.
The centrifugal pump is the pump with the largest dosage and is widely applied to national economic departments such as water supply and drainage and agricultural engineering, solid particle liquid conveying engineering, energy engineering, aerospace and navigation engineering, vehicle engineering, petroleum and chemical industry and the like. The traditional centrifugal pump is generally horizontal, is connected with a motor by an end cover, can often encounter the problem of pumping gas-liquid two-phase flow, brings a series of hazards to the normal operation and the service life of the pump, and can not meet the requirement of a high-speed centrifugal pump when the space is limited and fluid with high gas content is conveyed.
In addition, the main problems of centrifugal pumps in actual production and operation are: the actual working condition of the water pump is usually deviated from the designed working condition under most conditions, so that the operation efficiency is greatly reduced; in most centrifugal pump stations in China, especially in pump stations with large water level amplitude, the pump stations often operate under low-efficiency working conditions, and a large amount of energy is wasted.
SUMMERY OF THE UTILITY MODEL
One of the purposes of the application is to provide a high-speed centrifugal pump capable of resisting steam-bound cavitation in a limited space, and the purpose is to improve the problem that steam-bound cavitation of the existing centrifugal pump is serious.
The technical scheme of the application is as follows:
a cavitation erosion resistant high speed centrifugal pump in a confined space comprising:
the pump body is hollow inside and is provided with an inlet and an outlet;
the impeller is rotatably arranged in the inner cavity of the pump body; the impeller is provided with a plurality of blades, each blade is provided with a first backflow hole and a second backflow hole, the diameter of each first backflow hole is larger than that of each second backflow hole, the distance from each first backflow hole to the center of the impeller is smaller than that from each second backflow hole to the center of the impeller, and a connecting line between three points of the circle center of each first backflow hole, the circle center of each second backflow hole and the center of the impeller on the same blade is a triangle;
and the driving end of the motor is in transmission connection with the impeller through a transmission shaft and is used for driving the impeller to rotate in the inner cavity of the pump body.
As a technical scheme of this application, the pump body includes spiral case and end cover, the spiral case has import and export, the top and bottom both ends of end cover are respectively through screw thread cylindric lock fixed mounting on one side of spiral case, the impeller rotationally install by the spiral case with in the inner chamber that the end cover encloses and establishes.
As a technical scheme of this application, the shell of motor pass through clamp and screw fixed connection in the end cover.
As a technical scheme of this application, the import level sets up, the vertical setting of export, and the opening up.
As a technical scheme of the application, the diameter of the first backflow hole is 4-6 mm.
As a technical solution of the present application, the diameter of the first backflow hole is 5 mm.
As a technical scheme of the application, the diameter of the second backflow hole is 3-5 mm.
As a technical scheme of this application, the diameter of second backward flow hole is 4 mm.
The beneficial effect of this application:
in the anti-cavitation high-speed centrifugal pump in the limited space, before the high-speed centrifugal pump works, a pump body of the high-speed centrifugal pump is filled with fluid, then a motor is started to drive an impeller to rotate at a high speed, a plurality of blades of the impeller drive the fluid to rotate at a high speed, and the fluid flows outwards along a fluid flow channel by means of inertia when rotating and is discharged from an outlet through a discharge flow channel; meanwhile, the impeller sucks fluid from an inlet of the pump body, so that the fluid is sucked in from the horizontal direction, is radially screwed out and is finally vertically discharged; meanwhile, a large amount of bubbles are generated at a position close to the center of the impeller through high-speed rotation of the fluid, the moving directions of the fluid in the impeller flow channel and the fluid entering the flow channel from the first backflow hole are opposite, so that favorable conditions are created for shearing large bubbles in the fluid, and then the bubbles formed when the fluid flows to the outer edge of the impeller are sheared again by the second backflow hole by using the same principle. Therefore, this equipment is equivalent to and vertically places the high-speed centrifugal pump body, and through the clamp connection, area is little, thereby practice thrift the space, practice thrift the cost, and set up a plurality of first backward flow holes and second backward flow hole in grades in every runner of impeller, utilize fluidic opposite motion to cut fragment of a lot of in the fluid because the bubble that high-speed rotation and other reasons generated, thereby effectively solve or partially solve steam-bound cavitation phenomenon, effectively reduce the loss of fluid to the organism, practice thrift the cost, still can satisfy the demand of high-speed centrifugal pump when the space is limited and fluid bubble is too much. Therefore, the pump body and the high-speed centrifugal pump with the same have the advantages of small occupied space, reliable structure, high efficiency, simplicity and convenience in installation, ingenious design, capability of effectively solving the phenomenon of steam-bound cavitation, effective reduction of fluid loss to the body, cost saving and suitability for large-scale popularization and use.
Drawings
In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a cross-sectional view of an anti-cavitation high-speed centrifugal pump in a confined space provided by an embodiment of the present application;
FIG. 2 is a schematic view of a clamp according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of an impeller provided in an embodiment of the present application.
Icon: 1-anti-steam-bound cavitation high-speed centrifugal pump in a limited space; 2-a pump body; 3-an outlet; 4-an impeller; 5-blade; 6-a first flowback hole; 7-a second recirculation hole; 8-end cap; 9-clamping a hoop; 10-a motor; 11-volute.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that the terms "upper" and "lower" are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the utility model is used, and are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the device or element to be referred must have a specific orientation, be constructed in a specific orientation and operation, and thus, should not be construed as limiting the present application.
Further, in the present application, unless expressly stated or limited otherwise, the first feature may be directly contacting the second feature or may be directly contacting the second feature, or the first and second features may be contacted with each other through another feature therebetween, not directly contacting the second feature. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Example (b):
referring to fig. 1, and fig. 2 and 3 in a matching manner, the present application provides a steam-bound cavitation-resistant high-speed centrifugal pump 1 in a limited space, which includes a pump body 2, the pump body 2 includes a volute 11 and an end cover 8, the volute 11 has an inlet and an outlet 3, two ends of the top and bottom of the end cover 8 are respectively fixedly mounted on one side of the volute 11 through threaded cylindrical pins, meanwhile, an impeller 4 is rotatably mounted in an inner cavity enclosed by the volute 11 and the end cover 8, a flow channel is located at the periphery of the impeller 4 and is communicated with the outlet 3; the driving end of the motor 10 is in transmission connection with the impeller 4 through a transmission shaft and is used for driving the impeller 4 to rotate in the inner cavity of the pump body 2.
It should be noted that, in this embodiment, the top and bottom two ends of the housing of the motor 10 are respectively fixedly connected to the end cover 8 through the clamp 9 and the screw, so as to set up, so that the connection between each component of the whole device is more compact, and simultaneously, the volume of the whole device can be effectively reduced, so that the whole device occupies a smaller space.
Further, a plurality of blades 5 are arranged on the impeller 4, a first backflow hole 6 and a second backflow hole 7 are formed in each blade 5, the diameter of the first backflow hole 6 is larger than that of the second backflow hole 7, the distance from the first backflow hole 6 to the center of the impeller 4 is smaller than that from the second backflow hole 7 to the center of the impeller 4, and a connecting line between the circle center of the first backflow hole 6 on the same blade 5, the circle center of the second backflow hole 7 and the three points of the center of the impeller 4 is a triangle.
It should be noted that, in the present embodiment, the inlet is horizontally disposed, the outlet 3 is vertically disposed, and the opening faces upward.
It should be noted that, in the present embodiment, the diameter of the first reflow hole 6 is 4-6 mm; further, the diameter of the first return orifice 6 may be designed to be 5 mm.
In this embodiment, the diameter of the second reflow hole 7 is 3 to 5 mm; further, the diameter of the second return hole 7 may be designed to be 4 mm.
The working principle of the anti-steam-bound cavitation high-speed centrifugal pump 1 in the limited space is as follows:
before the high-speed centrifugal pump works, filling fluid in a pump body 2 of the high-speed centrifugal pump, then starting a motor 10 to drive an impeller 4 to rotate at a high speed, driving the fluid to rotate at a high speed by a plurality of blades 5 of the impeller 4, leading the fluid to flow to the outer edge of the impeller 4 along a fluid flow channel by means of inertia when the fluid rotates, and discharging the fluid from an outlet 3 through a discharge flow channel; meanwhile, the impeller 4 sucks fluid from the inlet of the pump body 2, so that the fluid is sucked in from the horizontal direction, is radially screwed out and is finally vertically discharged; meanwhile, a large amount of bubbles are generated at a position close to the center of the impeller 4 by the fluid rotating at a high speed, the moving directions of the fluid in the flow channel of the impeller 4 and the fluid entering the flow channel from the first backflow hole 6 are opposite, so that favorable conditions are created for shearing large bubbles in the fluid, and then the bubbles formed when the fluid flows to the outer edge of the impeller 4 are sheared again by the second backflow hole 7 by using the same principle.
In conclusion, the equipment is equivalent to vertically placing the high-speed centrifugal pump body 2 and is connected through the clamp 9, the occupied area is small, the space is saved, the cost is saved, the first backflow holes 6 and the second backflow holes 7 are arranged in each flow channel of the impeller 4 in a grading mode, bubbles generated due to high-speed rotation and other reasons in fluid are sheared for multiple times by means of opposite movement of the fluid, the steam-bound cavitation phenomenon is effectively solved or partially solved, loss of the fluid to a machine body is effectively reduced, the cost is saved, and the requirements of the high-speed centrifugal pump can be met when the space is limited and the fluid bubbles are too much. Therefore, the pump body 2 and the high-speed centrifugal pump with the pump body 2 have the advantages of small occupied space, reliable structure, high efficiency, simplicity and convenience in installation, ingenious design, capability of effectively solving the steam-bound cavitation phenomenon, effective reduction of fluid loss to the machine body, cost saving and suitability for large-scale popularization and use.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (8)
1. The utility model provides an anti steam-tie cavitation high-speed centrifugal pump in finite space which characterized in that includes:
the pump body is hollow inside and is provided with an inlet and an outlet;
the impeller is rotatably arranged in the inner cavity of the pump body; the impeller is provided with a plurality of blades, each blade is provided with a first backflow hole and a second backflow hole, the diameter of each first backflow hole is larger than that of each second backflow hole, the distance from each first backflow hole to the center of the impeller is smaller than that from each second backflow hole to the center of the impeller, and a connecting line between three points of the circle center of each first backflow hole, the circle center of each second backflow hole and the center of the impeller on the same blade is a triangle;
and the driving end of the motor is in transmission connection with the impeller through a transmission shaft and is used for driving the impeller to rotate in the inner cavity of the pump body.
2. The confined space cavitation erosion resistant high speed centrifugal pump of claim 1 wherein the pump body includes a volute having an inlet and an outlet and an end cap having a top and a bottom end fixedly mounted on one side of the volute by a threaded cylindrical pin, respectively, the impeller being rotatably mounted in an interior chamber enclosed by the volute and the end cap.
3. The high-speed centrifugal pump resisting cavitation erosion in a limited space of claim 2, wherein a housing of the motor is fixedly connected to the end cover through a clamp and a screw.
4. The cavitation-resistant high-speed centrifugal pump in a limited space according to claim 1, wherein the inlet is horizontally disposed, the outlet is vertically disposed, and the opening is upward.
5. The confined space cavitation erosion resistant high speed centrifugal pump of claim 1 wherein the first return orifice is 4-6mm in diameter.
6. The confined space cavitation erosion resistant high speed centrifugal pump of claim 5 wherein the first return orifice is 5mm in diameter.
7. The confined space cavitation erosion resistant high speed centrifugal pump of claim 1 wherein the second return orifice is 3-5mm in diameter.
8. The confined space cavitation erosion resistant high speed centrifugal pump of claim 7 wherein the second return orifice is 4mm in diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021836356.6U CN212838565U (en) | 2020-08-28 | 2020-08-28 | Anti-steam-bound cavitation erosion high-speed centrifugal pump in limited space |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021836356.6U CN212838565U (en) | 2020-08-28 | 2020-08-28 | Anti-steam-bound cavitation erosion high-speed centrifugal pump in limited space |
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| Publication Number | Publication Date |
|---|---|
| CN212838565U true CN212838565U (en) | 2021-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021836356.6U Expired - Fee Related CN212838565U (en) | 2020-08-28 | 2020-08-28 | Anti-steam-bound cavitation erosion high-speed centrifugal pump in limited space |
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| Country | Link |
|---|---|
| CN (1) | CN212838565U (en) |
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2020
- 2020-08-28 CN CN202021836356.6U patent/CN212838565U/en not_active Expired - Fee Related
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Granted publication date: 20210330 |