CN113001119B - Method for manufacturing centrifugal pump - Google Patents
Method for manufacturing centrifugal pump Download PDFInfo
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- CN113001119B CN113001119B CN202110257470.6A CN202110257470A CN113001119B CN 113001119 B CN113001119 B CN 113001119B CN 202110257470 A CN202110257470 A CN 202110257470A CN 113001119 B CN113001119 B CN 113001119B
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- pipe part
- centrifugal
- inlet pipe
- spiral volute
- centrifugal pump
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention belongs to the technical field of centrifugal pumps, and particularly relates to a method for manufacturing a centrifugal pump, which comprises a centrifugal pump shell, a motor and an impeller, wherein the centrifugal pump shell comprises a round pipe fitting and a spiral volute which gradually increases radially outwards, the round pipe fitting formed by stamping and stretching and the spiral volute which gradually increases radially outwards are formed by stamping and winding, the round pipe fitting is sequentially provided with a water inlet pipe part, a centrifugal chamber pipe part and an impeller inlet pipe part along the axial direction, the inner peripheral wall of the spiral volute is attached to the outer peripheral wall of the centrifugal chamber pipe part, and a centrifugal water outlet hole which is communicated with the inner cavity of the centrifugal chamber pipe part and the inner cavity of the spiral volute is fixedly arranged on the centrifugal chamber pipe part through welding and sealing connection. The radial sheet left after the opening has a flow guiding effect after the angle adjustment is carried out on the fluid, so that the centrifugal pump can bear the impact pressure effect of the fluid.
Description
Technical Field
The invention belongs to the technical field of centrifugal pumps, and particularly relates to a method for manufacturing a centrifugal pump.
Background
The centrifugal pump is a general mechanical product with large demand and wide application range, and is widely applied to various fields, the manufacturing method of the centrifugal pump shell generally adopts a casting method, the shell manufactured by the casting method has high strength and long service life, and meets the use standard of the centrifugal pump, but the casting method is a process with high power consumption, more consumables, high labor intensity and environmental pollution, and therefore, the manufacturing cost of the centrifugal pump shell cannot be reduced. At present, there are processes of stamping and welding for manufacturing centrifugal pump housings, such as a micro centrifugal pump formed by stamping and welding a metal plate disclosed in patent cn98250327.x and a stainless steel volute pump formed by stamping and welding disclosed in patent cn01231322.x, and the like, and the existing stamping and welding structures are prone to leak caused by gaps when pressure changes are large (i.e. when impact pressure is large).
Disclosure of Invention
The present invention is directed to overcoming the disadvantages and drawbacks of the prior art and to providing a method of manufacturing a centrifugal pump.
The technical scheme adopted by the invention is as follows: a method for manufacturing a centrifugal pump comprises a centrifugal pump shell, a motor and an impeller, wherein the centrifugal pump shell comprises a round pipe fitting and a spiral volute which is gradually increased outwards in the radial direction, the round pipe fitting is sequentially provided with a water inlet pipe part, a centrifugal chamber pipe part and an impeller inlet pipe part along the axial direction, and the inner peripheral wall of the spiral volute is attached to the outer peripheral wall of the centrifugal chamber pipe part and is fixedly connected through welding and sealing; the outer end of the spiral volute is provided with a water outlet pipe part, and the centrifugal chamber pipe part is provided with a centrifugal water outlet hole which is communicated with the inner cavity of the centrifugal chamber pipe part and the inner cavity of the spiral volute; the motor is connected to the outer end part of the inlet pipe part of the impeller, the impeller is positioned in the inner cavity of the centrifugal chamber pipe part, the motor can drive the impeller to rotate, and the rotation direction of the impeller corresponds to the radial increasing direction of the spiral volute;
the method of manufacturing a centrifugal pump housing comprises the steps of:
step one, forming a circular pipe piece with a water inlet pipe part, a centrifugal chamber pipe part and an impeller inlet pipe part by stamping and stretching;
step two, forming a spiral volute increasing radially outwards by stamping and winding outside the centrifugal chamber pipe part of the round pipe piece formed in the step one, or sleeving the spiral volute outside the centrifugal chamber pipe part of the round pipe piece formed in the step one after forming the spiral volute increasing radially outwards by stamping and winding; and welding flux is filled between the inner peripheral wall of the spiral volute and the outer peripheral wall of the centrifugal chamber pipe part for welding, sealing and fixing.
In the first step, the method comprises the step of forming a water inlet pipe part, a centrifugal chamber pipe part and an impeller inlet pipe part through a reducing pipeline stamping processing die, wherein the inner diameter of the centrifugal chamber pipe part is larger than that of the water inlet pipe part.
The first step comprises the following processes: integrally stamping and stretching the outer end part of the water inlet pipe part to form a water inlet pipe connecting flange; and integrally stamping and stretching the outer end part of the inlet pipe part of the impeller to form an integrally stamping and stretching outer end part to form the motor connecting flange.
The first step comprises the following processes: the water inlet pipe connecting flange and the motor connecting flange are formed by independent stretching or cutting and forming, then the water inlet pipe connecting flange is fixedly connected with the water inlet pipe part in a welding mode, and the motor connecting flange is fixedly connected with the impeller inlet pipe part in a welding mode.
In the second step, the spiral volute is formed by punching and winding an integrated single cut metal plate.
In the second step, the spiral volute is formed by independently stamping a plurality of cut metal plates to form a plurality of spiral volute units, and the spiral volute units are spliced end to end and then welded and fixed to form the spiral volute
The water outlet pipe part is formed by independent stamping and stretching and then is connected with the outer end part of the spiral volute and is welded and fixed.
The outer end of the water outlet pipe part is provided with a water outlet pipe connecting flange, and the water outlet pipe connecting flange is welded and connected with the water outlet pipe part after being integrally stamped, stretched and formed or being separately stretched and formed with the water outlet pipe part.
The invention has the following beneficial effects: when the centrifugal pump provided by the invention is used, fluid enters the inner cavity of the pipe part of the centrifugal chamber from the water inlet pipe part, and the radial sheet left after the opening has a flow guide effect after the angle of the fluid is adjusted, so that the centrifugal pump can bear the impact pressure effect of the fluid.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.
FIG. 1 is a schematic structural view of a centrifugal pump casing made in accordance with the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is a sectional view taken along line B-B of FIG. 1;
FIG. 4 is a schematic view of the fluid direction of the centrifugal pump under the action of the impeller;
FIG. 5 is a schematic view of a process for manufacturing a circular tube;
FIG. 6 is a schematic view of another alternative process for manufacturing a circular tube;
FIG. 7 is a schematic view of a process for manufacturing a centrifugal pump housing;
FIG. 8 is a schematic view of another alternative process for manufacturing spiral volutes;
in the drawings, 1, a circular tube; 101, a water inlet pipe part; 102, a centrifugal chamber tube part; 103, an impeller inlet pipe portion; 104, centrifuging to form a water outlet; 105, connecting a water inlet pipe with a flange; 106, a motor connecting flange; 2, a spiral volute; 3, a water outlet pipe part; 301, a water outlet pipe is connected with a flange; 4, an impeller.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
The terms of direction and position of the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer to the direction and position of the attached drawings. Accordingly, the use of directional and positional terms is intended to illustrate and understand the present invention and is not intended to limit the scope of the present invention.
A method for manufacturing a centrifugal pump, the centrifugal pump comprises a centrifugal pump shell, a motor and an impeller 4, as shown in figures 1-3, the centrifugal pump shell comprises a round pipe fitting 1 and a spiral volute 2 which gradually increases outwards in the radial direction, the round pipe fitting 1 is sequentially provided with a water inlet pipe part 101, a centrifugal chamber pipe part 102 and an impeller inlet pipe part 103 along the axial direction, and the inner peripheral wall of the spiral volute 2 is attached to the outer peripheral wall of the centrifugal chamber pipe part 102 and is fixedly connected through welding and sealing; the outer end of the spiral volute 2 is provided with a water outlet pipe part 3, and the centrifugal chamber pipe part 102 is provided with a centrifugal water outlet hole 104 for communicating the inner cavity of the centrifugal chamber pipe part 102 with the inner cavity of the spiral volute 2; the motor is connected to the outer end part of the impeller inlet pipe part 103, the impeller 4 is positioned in the inner cavity of the centrifugal chamber pipe part 102, the motor can drive the impeller 4 to rotate, and the rotation direction of the impeller corresponds to the radial increasing direction of the spiral volute 2;
the method of manufacturing a centrifugal pump housing comprises the steps of:
step one, forming a circular tube piece 1 with a water inlet tube part 101, a centrifugal chamber tube part 102 and an impeller inlet tube part 103 through stamping and stretching;
step two, forming a spiral volute 2 which gradually increases radially outwards by stamping and winding outside the centrifugal chamber pipe part 102 of the round pipe piece 1 formed in the step one, or sleeving the spiral volute 2 outside the centrifugal chamber pipe part 102 of the round pipe piece 1 formed in the step one after forming the spiral volute 2 which gradually increases radially outwards by stamping and winding; and welding flux is filled between the inner peripheral wall of the spiral volute 2 and the outer peripheral wall of the centrifugal chamber pipe part 102 for welding, sealing and fixing.
As shown in fig. 4, when the centrifugal pump manufactured by this embodiment is used, fluid enters the inner cavity of the centrifugal chamber pipe portion from the water inlet pipe portion, and the radial sheet left after the opening has a flow guiding effect after the angle of the fluid is adjusted, so that the centrifugal pump can better bear the impact pressure of the fluid.
Specifically, the inside diameter of the centrifugal chamber tube part 102 is larger than the inside diameter of the water inlet tube part 101. Therefore, the punching and drawing process of the round pipe fitting 1 includes forming the water inlet pipe part 101, the centrifugal chamber pipe part 102 and the impeller inlet pipe part 103 through the reducing pipe processing die.
The outer end of the water inlet pipe part 101 is provided with a water inlet pipe connecting flange 105, and the water inlet pipe connecting flange 105 is welded and connected with the water inlet pipe part 101 after being integrally stamped, stretched and formed or separately stretched or cut and formed with the water inlet pipe part 101, the centrifugal chamber pipe part 102 and the impeller inlet pipe part 103.
The outer end of the impeller inlet pipe part 103 is provided with a motor connecting flange 106, and the motor connecting flange 106 is welded and connected with the impeller inlet pipe part 103 after being integrally stamped, stretched and formed or separately stretched or cut and formed with the water inlet pipe part 101, the centrifugal chamber pipe part 102 and the impeller inlet pipe part 103.
Therefore, the process for preparing the round pipe member 1 can be as shown in fig. 5, and comprises the following steps:
(1-1) integrally stamping and stretching the circular pipeline with the same diameter into a variable diameter circular pipeline with a water inlet pipe part 101, a centrifugal chamber pipe part 102, an impeller inlet pipe part 103, a water inlet pipe connecting flange 105 and a motor connecting flange 106;
and (1-2) a centrifugal water outlet hole 104 is formed in a centrifugal chamber pipe part 102 in the diameter-variable circular pipeline prepared in the step (1-1).
Alternatively, the process for preparing the round pipe fitting 1 can be as shown in fig. 6, and comprises the following steps:
(1-1) integrally stamping and stretching the circular pipeline with the same diameter into a variable diameter circular pipeline with a water inlet pipe part 101, a centrifugal chamber pipe part 102 and an impeller inlet pipe part 103;
(1-2) a centrifugal water outlet hole 104 is formed in a centrifugal chamber pipe part 102 in the diameter-variable circular pipeline;
(1-3) welding a water inlet pipe connecting flange 105 and a motor connecting flange 106 which are formed by independent stretching or cutting at two ends of the reducing circular pipeline;
the step (1-3) can be carried out before or after the step (1-2) is carried out, and the two steps do not have a necessary sequence relationship.
The water outlet pipe part 3 is formed by independent stretching and then is fixedly connected with the spiral volute 2 in a welding mode.
Therefore, the spiral volute 2 and the outlet pipe portion 3 may be prepared as shown in fig. 7, and include the following steps:
(2-1) forming a spiral volute 2 which gradually increases outwards in the radial direction by punching and winding the cut metal plate;
(2-2) forming a water outlet pipe part 3 by stamping and drawing, wherein the water outlet pipe part is a bent pipeline as shown in the figure;
(2-3) welding the water outlet pipe part 3 to the outer end part of the spiral volute 2.
In the step (2-1), the spiral volute 2 may be formed by punching and winding a whole metal plate, or may be formed by punching and welding a plurality of separate metal plates to form a component separately as shown in fig. 8, and then the spiral volute 2 is formed by assembling and welding, both the two modes are possible, the spiral volute 2 formed by a whole metal plate has stronger strength, but the difficulty requirement of the process is reduced by the mode of punching a plurality of separate metal plates separately and then assembling and welding, and the spiral volute 2 can be selected according to the design requirement of an actual product.
In the step (2-1), the spiral volute 2 may be formed by stamping and winding the spiral volute 2, and then the spiral volute 2 is sleeved outside the centrifugal chamber pipe portion 102, at this time, a large gap is formed between the spiral volute 2 and the centrifugal chamber pipe portion 102, and solder is applied to the gap for welding. In the step (2-1), the spiral volute 2 may also be formed by stamping along the periphery of the centrifugal chamber pipe portion 102, first attaching and fixing a short edge (the length of which corresponds to the width of the spiral volute 2) of a metal plate to the outer side wall of the centrifugal chamber pipe portion 102, then stamping to form the spiral volute 2 gradually increasing radially outwards, keeping the edges of the two sides attached to the outer side wall of the centrifugal chamber pipe portion 102, and then welding.
The outer tip of play water pipe portion 3 is equipped with outlet pipe connection flange 301, outlet pipe connection flange 301 is fixed with play water pipe portion 3 welded connection after for the integrative punching press stretch forming of play water pipe portion 3 or stretch forming alone.
The utility model provides a centrifugal pump, includes centrifugal pump shell, motor, impeller 4, the centrifugal pump shell is as above punching press welded forming centrifugal pump shell, the motor is located impeller inlet pipe portion 103 outside and is connected with impeller inlet pipe portion 103, the impeller is located centrifugal chamber pipe portion 102 inner chamber, the motor can drive the impeller and make its rotation and the rotation direction of impeller corresponding with spiral volute 2's radial increase direction.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (8)
1. A method of manufacturing a centrifugal pump, characterized by: the centrifugal pump comprises a centrifugal pump shell, a motor and an impeller (4), wherein the centrifugal pump shell comprises a round pipe fitting (1) and a spiral volute (2) which gradually increases outwards in the radial direction, the round pipe fitting (1) is sequentially provided with a water inlet pipe part (101), a centrifugal chamber pipe part (102) and an impeller inlet pipe part (103) along the axial direction, and the inner peripheral wall of the spiral volute (2) is attached to the outer peripheral wall of the centrifugal chamber pipe part (102) and is fixedly connected in a sealing mode through welding; a water outlet pipe part (3) is arranged at the outer end of the spiral volute (2), and a centrifugal water outlet hole (104) which is communicated with the inner cavity of the centrifugal chamber pipe part (102) and the inner cavity of the spiral volute (2) is formed in the centrifugal chamber pipe part (102); the motor is connected to the outer end of the impeller inlet pipe part (103), the impeller (4) is positioned in the inner cavity of the centrifugal chamber pipe part (102), the motor drives the impeller (4) to rotate, and the rotation direction of the impeller corresponds to the radial increasing direction of the spiral volute (2);
the method of manufacturing a centrifugal pump housing comprises the steps of:
step one, forming a round pipe piece (1) with a water inlet pipe part (101), a centrifugal chamber pipe part (102) and an impeller inlet pipe part (103) through stamping and stretching;
step two, forming a spiral volute (2) which gradually increases radially outwards by stamping and winding outside the centrifugal chamber pipe part (102) of the round pipe fitting (1) formed in the step one, or sleeving the spiral volute (2) outside the centrifugal chamber pipe part (102) of the round pipe fitting (1) formed in the step one after forming the spiral volute (2) which gradually increases radially outwards by stamping and winding; and welding flux is filled between the inner peripheral wall of the spiral volute (2) and the outer peripheral wall of the centrifugal chamber pipe part (102) for welding, sealing and fixing.
2. A method of manufacturing a centrifugal pump according to claim 1, wherein: in the first step, a step of forming a water inlet pipe part (101), a centrifugal chamber pipe part (102) and an impeller inlet pipe part (103) through a reducing pipeline stamping processing die is included, and the inner diameter of the centrifugal chamber pipe part (102) is larger than that of the water inlet pipe part (101).
3. A method of manufacturing a centrifugal pump according to claim 1 or 2, characterized in that: the first step comprises the following processes: integrally stamping, stretching and forming the outer end of the water inlet pipe part (101) to form a water inlet pipe connecting flange (105); and the outer end part of the inlet pipe part (103) of the impeller is integrally stamped, stretched and formed to form a motor connecting flange (106).
4. A method of manufacturing a centrifugal pump according to claim 1 or 2, characterized in that: the first step comprises the following processes: the water inlet pipe connecting flange (105) and the motor connecting flange (106) are formed by independent stretching or cutting forming, then the water inlet pipe connecting flange (105) is fixedly connected with the water inlet pipe part (101) in a welding mode, and the motor connecting flange (106) is fixedly connected with the impeller inlet pipe part (103) in a welding mode.
5. A method of manufacturing a centrifugal pump according to claim 1, wherein: in the second step, the spiral volute (2) is formed by punching and winding an integral single cut metal plate.
6. A method of manufacturing a centrifugal pump according to claim 1, characterized in that: in the second step, the spiral volute (2) is formed by independently stamping a plurality of cut metal plates to form a plurality of spiral volute units, and the spiral volute units are spliced end to end and then welded and fixed to form the spiral volute (2).
7. A method of manufacturing a centrifugal pump according to claim 1, 5 or 6, characterized in that: the water outlet pipe part (3) is formed by independent stamping and stretching and then is connected with the outer end part of the spiral volute (2) and is welded and fixed.
8. A method of manufacturing a centrifugal pump according to claim 7, wherein: the outer tip of play water pipe portion (3) is equipped with outlet pipe connection flange (301), outlet pipe connection flange (301) are fixed with play water pipe portion (3) welded connection after for drawing forming with a water pipe portion (3) integrative punching press drawing forming or individual drawing forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110257470.6A CN113001119B (en) | 2021-03-09 | 2021-03-09 | Method for manufacturing centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110257470.6A CN113001119B (en) | 2021-03-09 | 2021-03-09 | Method for manufacturing centrifugal pump |
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| Publication Number | Publication Date |
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| CN113001119A CN113001119A (en) | 2021-06-22 |
| CN113001119B true CN113001119B (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110257470.6A Active CN113001119B (en) | 2021-03-09 | 2021-03-09 | Method for manufacturing centrifugal pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6032959B2 (en) * | 2012-06-18 | 2016-11-30 | 日本電産サンキョー株式会社 | Pump fixing structure and pump |
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2021
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|---|---|---|---|---|
| GB2013822A (en) * | 1978-02-02 | 1979-08-15 | Maschf Augsburg Nuernberg Ag | Method of making a fuel supply pipe |
| CN1138670A (en) * | 1996-03-26 | 1996-12-25 | 阳江市不锈钢冲压泵有限公司 | Press moulding centrifugal pump and its mfg. method |
| CN1243919A (en) * | 1999-07-27 | 2000-02-09 | 阳江市新粤华不锈钢泵有限公司 | Centrifugal pump shaped by punching and welding and its manufacture method |
| CN103769819A (en) * | 2014-01-23 | 2014-05-07 | 浩溪机械(上海)有限公司 | Processing process of stainless steel sewage-discharging pump shell |
| CN106351828A (en) * | 2015-07-15 | 2017-01-25 | 镇江先锋汽车零部件有限公司 | Oil pump housing and the production method thereof |
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