CN220910066U - Volute structure and water pump - Google Patents
Volute structure and water pump Download PDFInfo
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- CN220910066U CN220910066U CN202321827089.XU CN202321827089U CN220910066U CN 220910066 U CN220910066 U CN 220910066U CN 202321827089 U CN202321827089 U CN 202321827089U CN 220910066 U CN220910066 U CN 220910066U
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- volute
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- impeller
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 239000007788 liquid Substances 0.000 claims abstract description 46
- 238000000926 separation method Methods 0.000 claims abstract description 43
- 238000007789 sealing Methods 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010992 reflux Methods 0.000 description 9
- 230000009182 swimming Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The embodiment of the application provides a volute structure and a water pump, and relates to the technical field of water pumps, wherein the volute structure comprises a volute casing and an impeller structure, a first water inlet is formed in one side of the volute casing, and a water outlet is formed in the top of the volute casing; the side wall of the water outlet is provided with a gas-liquid separation port, and the transverse dimension of the gas-liquid separation port is less than or equal to two thirds of the diameter of the water outlet; a return port is arranged at the bottom of the volute casing; the impeller structure is disposed within the volute housing. The water pump comprises the volute structure, and the self-priming effect can be improved.
Description
Technical Field
The embodiment of the application relates to the technical field of water pumps, but is not limited to, in particular to a volute structure and a water pump.
Background
Currently, in order to reduce civil engineering costs, most of the circulating devices are installed above the water surface, so that the circulating pump of the swimming pool needs to have a considerable self-priming capability. In the related art, a guide vane is usually arranged in a volute to be matched with an impeller so as to realize self-priming. However, excitation noise caused by dynamic and static interference between the impeller and the guide vane of the guide vane type water pump is sharp and harsher, and cannot be tolerated. And the impeller outflow impacts the guide vane and diffuses along the runner, so that larger hydraulic loss is caused, and the energy consumption is larger under the same acting condition, so that the efficiency of the water pump is low. And the guide vane type pump has stall characteristics under the working condition of small flow, and the lift curve is not smooth, which causes trouble to system regulation. Therefore, a new volute structure is needed to improve the self-priming effect.
Disclosure of utility model
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims. The embodiment of the application provides a volute structure and a water pump, which can improve the self-priming effect.
In a first aspect, an embodiment of the present application provides a volute structure, including:
The water pump comprises a volute casing, wherein a first water inlet is formed in one side of the volute casing, and a water outlet is formed in the top of the volute casing; the side wall of the water outlet is provided with a gas-liquid separation port, and the transverse dimension of the gas-liquid separation port is less than or equal to two thirds of the diameter of the water outlet; a return port is arranged at the bottom of the volute casing;
and the impeller structure is arranged in the volute casing.
According to the volute structure of the first aspect of the application, the gas-liquid separation port and the reflux port are arranged on the volute casing, and the transverse dimension of the gas-liquid separation port is smaller than or equal to two thirds of the diameter of the water outlet, so that the gas-liquid separation port does not affect the water outlet performance of the water outlet, water in the volute casing is diffused and decelerated, enters the gas-liquid separation cavity through the gas-liquid separation port to carry out gas-liquid separation, so that water with high density enters the reflux cavity, and then water in the reflux cavity flows back into the volute casing through the reflux port, self suction can be realized by the volute structure without arranging a guide vane, and at the moment, the hydraulic loss in the volute casing is smaller and the noise is small compared with the related technology. Therefore, compared with the related art, the volute structure provided by the embodiment of the application can improve the self-priming effect.
The distance between the reflux port and the axis of the impeller structure is 1.2-1.4 times of the radius of the impeller structure.
The equivalent diameter of the reflux port is the cubic root of the ratio of the design flow rate of the impeller structure to the rotating speed.
Wherein, the interval between the inside wall of spiral case shell with the impeller structure is greater than 6mm.
The first water inlet is provided with a sealing ring, and the sealing ring is sleeved on the impeller structure.
The impeller structure comprises a main shaft and impeller blades, the impeller blades are detachably and rotatably connected with the main shaft, and one section of the main shaft is arranged towards the first water inlet.
The volute structure further comprises a reinforcing rib, and the reinforcing rib is arranged on the volute casing.
In a second aspect, embodiments of the present application provide a water pump comprising a volute structure according to any of the embodiments of the first aspect.
The water pump further comprises a pump body, a filter cavity and a containing cavity are formed in the pump body, the containing cavity is located at one side of the filter cavity, and a second water inlet communicated with the first water inlet is formed in the containing cavity; the volute structure is arranged in the accommodating cavity, a gas-liquid separation cavity and a backflow cavity are formed between the volute shell and the inner side wall of the accommodating cavity, the gas-liquid separation cavity is communicated with the backflow cavity, the gas-liquid separation port is communicated with the gas-liquid separation cavity, and the backflow cavity is communicated with the backflow port.
The water pump further comprises a pump cover, the pump cover is located on one side, away from the second water inlet, of the containing cavity, and the pump cover is used for closing the opening.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate and do not limit the application.
Fig. 1 is a schematic structural view of a volute casing with a volute structure according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of a volute structure according to an embodiment of the present application;
Fig. 3 is a schematic cross-sectional view of a water pump according to an embodiment of the application.
Reference numerals:
The volute casing 100, the first water inlet 110, the water outlet 120, the gas-liquid separation port 130, the reflux port 140,
Impeller structure 200, impeller blades 210, main shaft 220, flat key 230, nut 240,
Seal ring 300, filter chamber 310, second water inlet 330, gas-liquid separation chamber 340, reflux chamber 350, pump body 360, pump cover 370,
Reinforcing ribs 410.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of the application only and is not intended to be limiting of the application. The terms "first," "second," "third," "fourth," and the like in the description of the application and in the above figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.
In the description of the present application, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present application can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
In the description of the present application, the descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In a first aspect, referring to fig. 1 to 3, an embodiment of the present application provides a volute structure, including:
The volute comprises a volute casing 100, wherein a first water inlet 110 is formed in one side of the volute casing 100, and a water outlet 120 is formed in the top of the volute casing 100; the side wall of the water outlet 120 is provided with a gas-liquid separation port 130, and the transverse dimension of the gas-liquid separation port 130 is less than or equal to two thirds of the diameter of the water outlet 120; the bottom of the volute housing 100 is provided with a return port 140;
Impeller structure 200 the impeller structure 200 is disposed within the volute housing 100.
According to the volute structure of the first aspect of the present application, the gas-liquid separation port 130 and the backflow port 140 are provided in the volute casing 100, and the transverse dimension of the gas-liquid separation port 130 is less than or equal to two thirds of the diameter of the water outlet 120, so that the gas-liquid separation port 130 does not affect the water outlet performance of the water outlet 120, and meanwhile, the water in the volute casing 100 is diffused and decelerated, and then enters the gas-liquid separation chamber 340 through the gas-liquid separation port 130 to perform gas-liquid separation, so that after the water with high density enters the backflow chamber 350, the water in the backflow chamber 350 flows back into the volute casing 100 through the backflow port 140, at this time, the volute structure can realize self suction without the need of a guide vane, and at this time, the hydraulic loss in the volute casing 100 is smaller and the noise is smaller compared with the related art. Therefore, compared with the related art, the volute structure provided by the embodiment of the application can improve the self-priming effect.
It should be noted that, the impeller structure 200 includes impeller blades 210, the volute structure is disposed in a pump body 360 of the water pump, after the volute structure is started, the impeller blades 210 draw water into the pump body to do work, and the water is guided out of the water outlet 120 through the volute housing 100, a part of the water is led out of the pump body 360 into an outlet pipe, and a part of the water is left in an outer cavity between the volute housing 100 and the pump body 360. When the rotation speed of the impeller blades 210 is stable, the impeller blades 210 convey the sucked air into the volute casing 100, the air and the swimming pool water are mixed in a gas-liquid mode, the mixed fluid is separated in a gas-liquid mode according to different densities in an outer cavity after leaving the volute casing 100, the air with low density leaves the pump body 360 from the water outlet 120, and the swimming pool water with high density returns to the outer edge of the impeller 210 from the backflow port 140 at the bottom of the volute casing 100 to be circularly mixed until self suction is completed.
It should be noted that the height of the gas-liquid separation port 130 in the vertical direction may be set according to practical requirements, and in some embodiments, 15mm is preferable. It should be noted that at least one gas-liquid separation port 130 is provided, and in some embodiments, two gas-liquid separation ports may be symmetrically provided along a sidewall of the water outlet 120. Those skilled in the art can selectively set the device according to actual requirements.
It should be noted that, because the open area of the gas-liquid separation port 130 is too large, a large leakage loss is caused when the volute structure is operated normally, enough gas-liquid separation space cannot be reserved, and if too small, the backflow is insufficient, so that the self-priming height is reduced and the self-priming time is prolonged. Thus, selecting a lateral dimension that is less than or equal to two-thirds the diameter of the outlet 120 effectively balances the reflux requirement with the self priming height and time requirements.
It should be noted that, the backflow port 140 is used to make the gas-liquid separated water just return to the outer edge of the outlet of the impeller blade 210 in the inner flow channel of the volute, and mix with the air at the outer edge of the impeller blade 210 at a high speed under the rotation of the impeller blade 210, and flow from the gas-liquid separation port 130 to the gas-liquid separation chamber 340 for rapid exhaustion. The return ports 140 are provided with at least one, and in some embodiments, two return ports 140 are provided, with the two return ports 140 being symmetrically disposed along an axis perpendicular to the main shaft 220.
It will be appreciated that, referring to fig. 2, the return port 140 is spaced from the axis of the impeller structure 200 by a distance of 1.2 to 1.4 times the radius of the impeller structure 200.
It should be noted that, in some embodiments, the backflow port 140 is located at the bottom of the volute casing 100 in the vertical direction of the pump body 360, and at this time, the distance between the backflow port 140 and the axis of the impeller structure 200 is the vertical distance. In some embodiments, referring to fig. 3, the return port 140 is located at the bottom of the volute housing 100 in the vertical direction of the pump body 360.
Illustratively, referring to fig. 2, where the radius of the impeller structure 200 is D2 as shown in fig. 2, the distance D3 of the return port 140 from the axis of the impeller structure 200 may range from 1.2D2 to 1.4D2, and in some embodiments may be set to 1.2D2, and in some embodiments may be set to 1.4D2.
It is understood that the equivalent diameter of the return port 140 is the cubic root of the designed flow to rotational speed ratio of the impeller structure 200.
The equivalent diameter means a diameter of a circular tube having an equal hydraulic radius, and means that the equivalent diameter of the pipe is 4 times the cross-sectional area divided by the wet cycle length; wherein the length of contact of the fluid with the solid wall surface in the effective cross section of the total flow is called the wet circumference and is denoted by the letter L. The ratio of the effective cross-sectional area a and the wet perimeter L of the total flow is defined as the hydraulic radius. The flow rate and velocity of the return port 140 can be determined by the equivalent diameter. Therefore, the flow rate and the flow rate flowing from the return port 140 to the impeller structure 200 can be satisfied by taking the cubic root of the designed flow rate and the rotation speed ratio of the impeller structure 200 as the equivalent diameter.
It is understood that the spacing between the inner sidewall of the volute housing 100 and the impeller structure 200 is greater than 6mm.
It is noted that the gap of the conventional self-priming pump is only 0.5-1mm at minimum, the noise is huge during starting, and can exceed 85dB, the setting interval is larger than 6mm, and the noise can be effectively reduced.
It is understood that the first water inlet 110 is provided with a sealing ring 300, and the sealing ring 300 is sleeved on the impeller structure 200.
Illustratively, referring to FIG. 3, a seal ring 300 is sleeved over the impeller blades 210.
It is understood that the impeller structure 200 includes a main shaft 220 and impeller blades 210, the impeller blades 210 are detachably and rotatably connected to the main shaft 220, and a section of the main shaft 220 is disposed toward the first water inlet 110.
It should be noted that, referring to fig. 3, the impeller structure 200 further includes a flat key 230 and a nut 240, and the impeller blades 210 are locked to the main shaft 220 by the flat key 230 and the nut 240.
It is understood that the volute structure further includes a stiffener 410, the stiffener 410 being disposed on the volute housing 100.
It should be noted that, a plurality of reinforcing ribs 410 may be provided, and a plurality of reinforcing ribs 410 are distributed along the circumferential direction of the water inlet.
In a second aspect, embodiments of the present application provide a water pump comprising a volute structure as in any of the embodiments of the first aspect.
It can be understood that the water pump further comprises a pump body 360, the pump body 360 is formed with a filter cavity 310 and a containing cavity, the containing cavity is positioned at one side of the filter cavity 310, and the containing cavity is provided with a second water inlet 330 communicated with the first water inlet 110; the volute structure is arranged in the accommodating cavity, a gas-liquid separation cavity 340 and a backflow cavity 350 are formed between the volute casing 100 and the inner side wall of the accommodating cavity, the gas-liquid separation cavity 340 is communicated with the backflow cavity 350, the gas-liquid separation port 130 is communicated with the gas-liquid separation cavity 340, and the backflow cavity 350 is communicated with the backflow port 140.
It should be noted that, by disposing the filter cavity 310 and disposing the filter cavity on one side of the accommodating cavity, the sucked water is sucked by the impeller blades 210 after the filter cavity 310 is rectified smoothly, so that the loss of water in the volute casing 100 can be reduced, and the noise is relatively small.
It will be appreciated that the side of the volute housing 100 opposite the first water inlet 110 is provided with an opening, the water pump further comprises a pump cover 370, the pump cover 370 being located on the side of the receiving cavity remote from the second water inlet 330, the pump cover 370 being adapted to close the opening.
By providing the pump cover 370, the volute casing 100 is more convenient to install.
For example, referring to the water pump shown in fig. 3, the water pump includes a pump body 360, a pump cover 370, and a volute casing 100, the pump body 360 is formed with a filter cavity 310 and a receiving cavity, the receiving cavity is located at one side of the filter cavity 310, a first water inlet 110 and a second water inlet 330 of the volute casing 100 are correspondingly disposed, the volute casing 100 is connected with the pump cover 370 to form a volute chamber having only the first water inlet 110, the water outlet 120, the gas-liquid separation port 130, and the backflow port 140, and the impeller structure 200 is disposed in the volute chamber. The impeller blades 210 are locked on the main shaft 220 by the flat key 230 and the nut 240, and the main shaft 220 drives the impeller blades 210 to rotate to do work and send water. A sealing ring 300 is installed between the impeller blade 210 and the first water inlet 110, after the impeller blade 210 is started, the swimming pool water and air stored in the filter cavity 310 are sucked into the volute cavity, the swimming pool water and the air are fully mixed and thrown into a flow passage between the volute casing 100 and the impeller blade 210 through the rotation acceleration of the impeller blade 210, and after the diffusion and the deceleration, the water in the volute casing 100 leaves the volute casing 100 from the water outlet 120 and is gathered in the gas-liquid separation cavity 340. To a certain extent, the air with small density is discharged through the water outlet 120, the swimming pool with large density is sunk into the water return cavity, enters the volute casing 100 through the reserved holes on the two sides of the bottom of the volute casing 100, and is mixed with the air newly sucked by the impeller blades 210 again and circulated. Until the inlet pipeline and the air in the pump are completely discharged, the self-priming process is finished, and the water pump starts to work normally.
The embodiment of the application also provides a water pump, which comprises the volute structure provided by the embodiment. It can be understood that the water pump comprises the volute structure provided by the embodiment or the volute structure provided by any embodiment, and the water pump comprises the beneficial effects and the specific implementation of the volute structure provided by any embodiment.
While the preferred embodiment of the present application has been described in detail, the present application is not limited to the above embodiment, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present application, and these equivalent modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims.
Claims (10)
1. A volute structure, comprising:
The water pump comprises a volute casing, wherein a first water inlet is formed in one side of the volute casing, and a water outlet is formed in the top of the volute casing; the side wall of the water outlet is provided with a gas-liquid separation port, and the transverse dimension of the gas-liquid separation port is less than or equal to two thirds of the diameter of the water outlet; a return port is arranged at the bottom of the volute casing;
and the impeller structure is arranged in the volute casing.
2. The volute structure of claim 1, wherein the return port is spaced from the center of the impeller structure by a distance that is 1.2-1.4 times the radius of the impeller structure.
3. The volute structure of claim 2, wherein the equivalent diameter of the return port is a cubic root of a designed flow to rotational speed ratio of the impeller structure.
4. The volute structure of claim 1, wherein a spacing between an inner sidewall of the volute housing and the impeller structure is greater than 6mm.
5. The volute structure of claim 1, wherein the first water inlet is provided with a sealing ring, and the sealing ring is sleeved on the impeller structure.
6. The volute structure of claim 1, wherein the impeller structure includes a main shaft and impeller blades, the impeller blades being removably rotatably connected to the main shaft, a section of the main shaft being disposed toward the first water inlet.
7. The volute structure of claim 1, further comprising:
And the reinforcing rib is arranged on the volute casing.
8. A water pump comprising a volute structure according to claim 1.
9. The water pump of claim 8, further comprising a pump body, the pump body defining a filter cavity and a receiving cavity, the receiving cavity being located on one side of the filter cavity, the receiving cavity defining a second water inlet in communication with the first water inlet; the volute structure is arranged in the accommodating cavity, a gas-liquid separation cavity and a backflow cavity are formed between the volute shell and the inner side wall of the accommodating cavity, the gas-liquid separation cavity is communicated with the backflow cavity, the gas-liquid separation port is communicated with the gas-liquid separation cavity, and the backflow cavity is communicated with the backflow port.
10. The water pump of claim 9, wherein the side of the volute housing opposite the first water inlet is provided with an opening, the water pump further comprising a pump cover located on a side of the receiving cavity remote from the second water inlet, the pump cover for closing the opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321827089.XU CN220910066U (en) | 2023-07-11 | 2023-07-11 | Volute structure and water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321827089.XU CN220910066U (en) | 2023-07-11 | 2023-07-11 | Volute structure and water pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220910066U true CN220910066U (en) | 2024-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321827089.XU Active CN220910066U (en) | 2023-07-11 | 2023-07-11 | Volute structure and water pump |
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| Country | Link |
|---|---|
| CN (1) | CN220910066U (en) |
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2023
- 2023-07-11 CN CN202321827089.XU patent/CN220910066U/en active Active
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