CN117927473A - Single-impeller multistage centrifugal pump and supercharging method thereof - Google Patents
Single-impeller multistage centrifugal pump and supercharging method thereof Download PDFInfo
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- CN117927473A CN117927473A CN202410154532.4A CN202410154532A CN117927473A CN 117927473 A CN117927473 A CN 117927473A CN 202410154532 A CN202410154532 A CN 202410154532A CN 117927473 A CN117927473 A CN 117927473A
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 62
- 230000000694 effects Effects 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000476 body water Anatomy 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
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Abstract
The invention discloses a single impeller multistage centrifugal pump and a pressurizing method thereof, which belong to the technical field of centrifugal pumps, wherein the pressurizing effect can be realized by liquid flowing through the centrifugal pump, and the centrifugal pump comprises: the method is applicable to the single-impeller multistage centrifugal pump, and is equivalent to the series operation of a plurality of small pumps; that is, the pressure of a plurality of flow channels is superposed, and the flow rate is that of a single flow channel; the pressure is the sum of the pressures of a plurality of flow channels, and the scheme is to increase the pressure of a single impeller, which is equivalent to a multi-stage pump; but is much simpler and more stable in construction than a multi-stage pump because there is quite only one impeller, one pump body, one pump cap and a single stage pump.
Description
Technical Field
The invention relates to the technical field of centrifugal pumps, in particular to a single-impeller multistage centrifugal pump and a pressurizing method thereof.
Background
The centrifugal pump is a machine for applying work to fluid and is used for increasing the pressure of the liquid so as to enable the liquid to flow in a conveying way; the centrifugal pump is used for conveying clear water and other liquids similar to water in physical and chemical properties in industrial production and daily life, and has wide application in the industries of chemical industry and petroleum departments, such as production, agricultural production, mining industry and metallurgical industry, electric power department, nuclear power station, national defense construction, pharmacy, water conservancy and the like.
For single stage centrifugal pumps in the prior art: the impeller outer diameter is increased to increase the lift, or the rotation speed is increased to increase the lift, the rotation speed is increased to cause the disc loss and the hydraulic loss to be increased drastically, the mechanical structure strength safety and the service life are influenced after the rotation speed is increased, the loss is great, the increase of the volume is caused to increase the manufacturing cost, the loss of the low-specific-rotation-speed water pump is the friction loss of the main disc, the loss of the volume and the loss of the hydraulic power, and the efficiency is low.
Disclosure of Invention
In order to achieve the above purpose, the present invention provides a scheme as follows: a single impeller multistage centrifugal pump through which a pressurizing effect can be achieved by a liquid flowing through the centrifugal pump, the centrifugal pump comprising:
a pump body 1 for carrying the mounting components of a centrifugal pump;
A liquid inlet 2 for introducing liquid into the centrifugal pump, the liquid inlet 2 being located on the pump body 1;
the liquid outlet 3 is used for leading the liquid after the pressurization of the centrifugal pump is finished to the outside of the centrifugal pump, and the liquid outlet 3 is positioned on the pump body 1;
an impeller mechanism 4 for rotationally pressurizing the liquid by the impeller mechanism 4, the impeller mechanism 4 being mounted in the pump body 1,
The pump body backwater mechanism 5 is used for realizing multistage pressurization through the pump body backwater mechanism 5 after the liquid is rotationally pressurized through the impeller mechanism 4, and the pump body backwater mechanism 5 is arranged in the pump body 1;
a driving member 6 for rotating the impeller mechanism 4;
wherein, the impeller mechanism 4 is embedded in the pump body backwater mechanism 5.
Further, the impeller mechanism 4 includes:
An impeller body 401;
a plurality of impeller blades 402 mounted on the impeller body 401 and forming a plurality of impeller flow passages 403;
An impeller shaft hole 404 for connecting with the driving member 6 to realize rotation of the impeller mechanism 4;
a pump cover 405 for positioning a mounting component of the centrifugal pump within the centrifugal pump;
pump cover 405 is mounted on pump body 1 by a locking member
Further, a first sealing ring 7 is also arranged between the impeller mechanism 4 and the driving part 6.
Further, the pump body backwater mechanism 5 includes:
a backwater mechanism housing 501;
A plurality of guide vanes 502 for dividing the interior of the backwater mechanism housing 501 into a plurality of backwater channels 503.
Further, the water return channel 503 is used for pressurizing the liquid after being rotationally pressurized by the impeller mechanism 4 again by the water return channel 503.
Further, the centrifugal pump further includes: an end cap 8 for positioning a mounting member of the centrifugal pump within the centrifugal pump;
The end cap 8 is mounted on the pump body 1 by means of a locking member.
Further, a second sealing ring 9 is arranged between the end cover 8 and the pump body 1.
The other scheme provided by the invention is as follows: the supercharging method of the single-impeller multistage centrifugal pump is suitable for the single-impeller multistage centrifugal pump, and comprises the following steps:
s1, starting a driving part 6 to enable an impeller mechanism 4 to start rotating;
s2, introducing liquid into the pump body through the liquid inlet 2;
s3, liquid enters one of the impeller flow passages 403 to be centrifugally pressurized;
s4, the liquid from the S3 enters one of the water return channels 503 of the pump body for further pressurization;
s5, the liquid from the S4 flows back to the next impeller flow channel (403) for further centrifugal pressurization;
s6, repeating the steps S3-S5, and pressurizing the liquid circulation to the last impeller runner (403) and discharging the liquid through the liquid outlet 3.
Advantageous effects
In summary, the invention has the following beneficial effects:
the scheme is equivalent to the series operation of a plurality of small pumps. I.e. the pressure of a plurality of flow channels is superimposed, the flow is that of a single flow channel. The pressure is the sum of the pressures of a plurality of flow channels, and the scheme is to increase the pressure of a single impeller and is equivalent to a multi-stage pump. But is much simpler and more stable in construction than a multi-stage pump because there is quite only one impeller, one pump body, one pump cap and a single stage pump.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for the description of the embodiments or the prior art will be briefly described, and it is apparent that the drawings in the following description are only one embodiment of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a single impeller multistage centrifugal pump according to the present invention;
FIG. 2 is an exploded view of a single impeller multistage centrifugal pump according to the present invention;
FIG. 3 is a schematic diagram of a pump body water return mechanism in the invention;
FIG. 4 is a schematic cross-sectional view of a single impeller multistage centrifugal pump of the present invention;
FIG. 5 is a cross-sectional view taken at A-A of FIG. 4 in accordance with the present invention;
FIG. 6 is a cross-sectional view at B-B of FIG. 4 in accordance with the present invention;
FIG. 7 is a graph showing the hydraulic pressure profile of a single stage pump in the prior art at a flow rate of 120m 2/h, a head of 51m, a shaft power of 37KW, and a shaft speed of 2950 r/min;
FIG. 8 is a graph showing the fluid pressure profile of a single impeller multistage pump according to the present invention at a flow rate of 20m 2/h, a head of 306m, a shaft power of 37KW, and a shaft speed of 2950 r/min.
The marks in the drawings are:
1. A pump body; 2. a liquid inlet; 3. a liquid outlet; 4. an impeller mechanism; 401. an impeller body; 402. impeller blades; 403. an impeller runner; 404. an impeller shaft hole; 405. a pump cover; 5. a pump body backwater mechanism; 501. a backwater mechanism housing; 502. a guide vane; 503. a water return channel; 6. a driving part; 7. a first seal ring; 8. an end cap; 9. and a second sealing ring.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the present invention easy to understand, the technical solutions in the embodiments of the present invention are clearly and completely described below to further illustrate the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all versions.
Example 1:
the invention is described in further detail below with reference to fig. 1-8.
Referring to fig. 1-6, a single impeller multistage centrifugal pump through which a fluid can be forced to achieve a pressurizing effect, the centrifugal pump comprising:
a pump body 1 for carrying the mounting components of a centrifugal pump;
A liquid inlet 2 for introducing liquid into the centrifugal pump, the liquid inlet 2 being located on the pump body 1;
the liquid outlet 3 is used for leading the liquid after the pressurization of the centrifugal pump is finished to the outside of the centrifugal pump, and the liquid outlet 3 is positioned on the pump body 1;
an impeller mechanism 4 for rotationally pressurizing the liquid by the impeller mechanism 4, the impeller mechanism 4 being mounted in the pump body 1,
Specifically, the impeller mechanism 4 is embedded in the pump body backwater mechanism 5.
Further, the impeller mechanism 4 includes:
An impeller body 401;
a plurality of impeller blades 402 mounted on the impeller body 401 and forming a plurality of impeller flow passages 403;
An impeller shaft hole 404 for connecting with the driving member 6 to realize rotation of the impeller mechanism 4;
a pump cover 405 for positioning a mounting component of the centrifugal pump within the centrifugal pump;
the pump cover 405 is mounted on the pump body 1 by a locking member.
As shown in fig. 3, the pump body backwater mechanism 5 is used for realizing multistage pressurization of the liquid through the pump body backwater mechanism 5 after the liquid is rotationally pressurized through the impeller mechanism 4, and the pump body backwater mechanism 5 is installed in the pump body 1;
Specifically, the pump body backwater mechanism 5 includes:
a backwater mechanism housing 501;
A plurality of guide vanes 502 for dividing the interior of the backwater mechanism housing 501 into a plurality of backwater channels 503.
Further, the water return channel 503 is used for pressurizing the liquid after being rotationally pressurized by the impeller mechanism 4 again by the water return channel 503.
A driving member 6 for rotating the impeller mechanism 4;
further, a first sealing ring 7 is also arranged between the impeller mechanism 4 and the driving part 6.
Further, the pump body backwater mechanism 5 includes:
further, the centrifugal pump further includes: an end cap 8 for positioning a mounting member of the centrifugal pump within the centrifugal pump;
The end cap 8 is mounted on the pump body 1 by means of a locking member.
Further, a second sealing ring 9 is arranged between the end cover 8 and the pump body 1.
As shown in figures 4-8, when one impeller runner rotates, the zero-pressure liquid at the point A of the water inlet with the pressure of 0.5MPa can be pressurized, and the point B of the pump body is pressurized to the pressure of 0.5MPa through the impeller runners 2 and 3. And the liquid at the point B flows to the point C of the pump body through the pump body backwater flow channel M. At this time, the pressure of the point C is also 0.5MPa, and the water at the point C is pressurized to 1.0MPa through the impeller flow channels 5 and 6 and flows to the point D. The pressure of 3MPa is generated when the pressure of the first stage reaches the L point. The impeller channels 1,4, 7 or all channels are sometimes non-flowing due to the positional relationship.
Example 2
A supercharging method of a single-impeller multistage centrifugal pump, which is suitable for use in the single-impeller multistage centrifugal pump described in the above-described embodiment 1, comprising:
s1, starting a driving part 6 to enable an impeller mechanism 4 to start rotating;
s2, introducing liquid into the pump body through the liquid inlet 2;
s3, liquid enters one of the impeller flow passages 403 to be centrifugally pressurized;
s4, the liquid from the S3 enters one of the water return channels 503 of the pump body for further pressurization;
s5, the liquid from the S4 flows back to the next impeller runner 403 for further centrifugal pressurization;
s6, repeating the steps S3-S5, and pressurizing the liquid circulation to the last impeller runner 403 to be discharged through the liquid outlet 3.
Experimental example
By testing the single-impeller multistage centrifugal pump described in example 1 above and the single-stage pump of the prior art for flow, head, shaft power and efficiency, relevant data were obtained, as shown in tables 1 and 2, and it can be seen from tables 1 and 2 that the single-impeller multistage pump can obtain a larger head, shaft power and efficiency at a relatively smaller flow. I.e. a single impeller multistage centrifugal pump corresponds to a plurality of single stage pumps.
Table 1 single impeller multi-stage pump test meter
Table 2 single stage pump test meter
The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.
Claims (8)
1. The utility model provides a single impeller multistage centrifugal pump, this centrifugal pump's liquid through this centrifugal pump can realize the pressure boost effect, its characterized in that, this centrifugal pump includes:
a pump body (1) for carrying the mounting components of the centrifugal pump;
a liquid inlet (2) for introducing liquid into the centrifugal pump, the liquid inlet (2) being located on the pump body (1);
The liquid outlet (3) is used for leading the liquid which is pressurized by the centrifugal pump out of the centrifugal pump, and the liquid outlet (3) is positioned on the pump body (1);
An impeller mechanism (4) for rotationally pressurizing the liquid by the impeller mechanism (4), the impeller mechanism (4) being mounted in the pump body (1),
The pump body backwater mechanism (5) is used for realizing multistage pressurization of liquid through the pump body backwater mechanism (5) after the liquid is rotationally pressurized through the impeller mechanism (4), and the pump body backwater mechanism (5) is arranged in the pump body (1);
a driving part (6) for rotating the impeller mechanism (4);
Wherein, the impeller mechanism (4) is embedded in the pump body backwater mechanism (5).
2. The single impeller multi-stage centrifugal pump according to claim 1, wherein: the impeller mechanism (4) comprises:
An impeller body (401);
A plurality of impeller blades (402) which are mounted on the impeller body (401) and form a plurality of impeller flow passages (403);
an impeller shaft hole (404) for connecting with the driving member (6) to realize rotation of the impeller mechanism (4);
A pump cover (405) for positioning a mounting component of the centrifugal pump within the centrifugal pump;
The pump cover (405) is mounted on the pump body (1) through a locking piece.
3. The single impeller multi-stage centrifugal pump according to claim 2, wherein: a first sealing ring (7) is also arranged between the impeller mechanism (4) and the driving part (6).
4. The single impeller multi-stage centrifugal pump according to claim 2, wherein: the pump body backwater mechanism (5) comprises:
a backwater mechanism housing (501);
A plurality of guide vanes (502) for dividing the interior of the backwater mechanism housing (501) into a plurality of backwater channels (503).
5. The single impeller multi-stage centrifugal pump according to claim 4, wherein: the water return channel (503) is used for pressurizing the liquid after the impeller mechanism (4) rotates and pressurizing again through the water return channel (503).
6. The single impeller multi-stage centrifugal pump according to claim 4, wherein: the centrifugal pump further includes: an end cap (8) for positioning a mounting component of the centrifugal pump within the centrifugal pump;
the end cover (8) is arranged on the pump body (1) through a locking piece.
7. The single impeller multi-stage centrifugal pump according to claim 6, wherein: wherein, be equipped with second sealing washer (9) between end cover (8) and the pump body (1).
8. The supercharging method of the single impeller multistage centrifugal pump is characterized by comprising the following steps of: the method is applicable to the single impeller multistage centrifugal pump according to any one of claims 1 to 7, and comprises:
s1, starting a driving component (6) to enable an impeller mechanism (4) to start rotating;
s2, introducing liquid into the pump body through the liquid inlet (2);
S3, the liquid is centrifugally pressurized by one impeller runner (403);
S4, the liquid from the S3 enters one of the water return channels (503) of the pump body for further pressurization;
s5, the liquid from the S4 flows back to the next impeller flow channel (403) for further centrifugal pressurization;
S6, repeating the steps S3-S5, and pressurizing the liquid circulation to the last impeller runner (403) and discharging the liquid through the liquid outlet (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410154532.4A CN117927473A (en) | 2024-02-02 | 2024-02-02 | Single-impeller multistage centrifugal pump and supercharging method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410154532.4A CN117927473A (en) | 2024-02-02 | 2024-02-02 | Single-impeller multistage centrifugal pump and supercharging method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117927473A true CN117927473A (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410154532.4A Pending CN117927473A (en) | 2024-02-02 | 2024-02-02 | Single-impeller multistage centrifugal pump and supercharging method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117927473A (en) |
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2024
- 2024-02-02 CN CN202410154532.4A patent/CN117927473A/en active Pending
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