CN218151639U - Centrifugal pump double-volute with bent partition plate - Google Patents
Centrifugal pump double-volute with bent partition plate Download PDFInfo
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- CN218151639U CN218151639U CN202220674317.3U CN202220674317U CN218151639U CN 218151639 U CN218151639 U CN 218151639U CN 202220674317 U CN202220674317 U CN 202220674317U CN 218151639 U CN218151639 U CN 218151639U
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Abstract
The utility model relates to a centrifugal pump double spiral case with crooked baffle, including separating tongue, baffle, the baffle separates into interior volute chamber and two passageways of outer volute chamber with the spiral case. The baffle is bent towards the outer volute. Curvature radius R of sectional line of middle thickness of curved partition and radius R of base circle of volute 4 The relevant value range is as follows: r =0.5R 4 ～0.8R 4 . The utility model discloses a crooked baffle replaces the straight baffle of tradition, and the interior fluid flow law of volute chamber in the reconsitution, the effective absorption fluid energy overcomes the serious phenomenon of volute chamber flow loss in the straight baffle of tradition in the double-volute, improves the pump lift and imitatesThe radial force borne by the impeller is effectively reduced while the rate is increased.
Description
Technical Field
The utility model relates to a centrifugal pump double spiral case, concretely relates to adopt crooked baffle to replace the centrifugal pump double spiral case that has crooked baffle of traditional straight baffle.
Background
The main flow volute form of the current centrifugal pump is mostly a single volute, and the single volute centrifugal pump can generate radial force acting on an impeller when in operation, so that a shaft is subjected to alternating stress, the service life of a pump shaft is influenced, and the normal working state of the pump is influenced. The double-volute pressurized-water chamber can greatly reduce radial force due to the symmetrical structure, and the adoption of the double volutes is a main measure for balancing the radial force of the pump at present. The double volute pump has the problem that the lift and efficiency are generally lower than those of a single volute pump due to the interference of an internal clapboard on the flow. Therefore, how to design a high-lift high-efficiency double-volute centrifugal pump is one of the key problems to be solved urgently in the current engineering.
At present, the optimization means of the double-volute centrifugal pump mainly focuses on a hydraulic design method of the double volute. For example, "a hydraulic design method of a centrifugal pump double volute" (patent application No.: 201611119680.4) discloses a design method of a double volute to improve the reliability and stability of the operation of a double volute centrifugal pump. The patent application number of 201811132947.2 discloses an energy-saving centrifugal pump volute design method based on a speed coefficient method, and a double volute is designed based on the speed coefficient method to achieve the purpose of energy conservation. At present, no relevant patent reports that the performance of the double-volute centrifugal pump is improved by adopting a bent partition plate are found.
SUMMERY OF THE UTILITY MODEL
To the above problem, the main object of the present invention is to provide a centrifugal pump double-volute with a curved partition, which uses a curved partition to replace a traditional straight partition.
The utility model discloses a solve above-mentioned technical problem through following technical scheme: a centrifugal pump double-volute having curved partitions, the centrifugal pump double-volute having curved partitions comprising: the volute is divided into an inner volute chamber and an outer volute chamber by the partition plate.
In an embodiment of the present invention, the partition is curved toward the outer volute.
In the embodiment of the present invention, the curvature radius R of the middle thickness transversal line of the curved partition plate and the base radius R of the spiral casing 4 The value ranges are as follows: r =0.5R 4 ～0.8R 4 。
In the embodiment of the present invention, the head end of the partition board and the partition tongue are symmetrical about the center of the base circle of the volute.
In the specific embodiment of the present invention, the included angle θ between the tail end and the head end of the partition board ranges from 160 ° to 180 °.
The utility model discloses an actively advance the effect and lie in: the utility model provides a centrifugal pump double volute with crooked baffle has following advantage: the utility model discloses a crooked baffle replaces the straight baffle of tradition, and the interior fluid flow law of volute chamber in the reconsitution, the serious phenomenon of volute chamber loss of flow in the two volutes of the straight baffle of tradition is overcome to the effective absorption fluid energy, effectively reduces the radial force that the impeller received when improving pump lift and efficiency.
Drawings
Fig. 1-1 is a schematic view of the overall structure of the present invention.
Fig. 1-2 isbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A of fig. 1-1.
Fig. 2 shows the relationship between the head of the twin-volute centrifugal pump and the flow rate under different curvature radiuses R of the curved partition.
FIG. 3 is a graph of dual volute centrifugal pump efficiency versus flow for different curved diaphragm radii of curvature R.
FIG. 4 is a graph of radial force versus flow for a twin volute centrifugal pump at different curved baffle radii of curvature R.
The utility model discloses the name that well reference numeral corresponds:
a baffle tongue 1, a curved baffle plate 2, an inner volute chamber 3 and an outer volute chamber 4
Detailed Description
The following provides a preferred embodiment of the present invention with reference to the accompanying drawings to explain the technical solutions of the present invention in detail.
Fig. 1-1 isbase:Sub>A schematic view of the overall structure of the present invention, and fig. 1-2 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 1-1, as shown in fig. 1-1 and 1-2: the utility model provides a centrifugal pump double spiral case with crooked baffle, this structure is including separating tongue 1, baffle 2, and interior volute 3 and two passageways of outer volute 4 are separated into with the spiral case to baffle 2, and baffle 2 is crooked to 4 directions of outer volute, and the curvature radius R and the spiral case base radius R of thickness transversal in the middle of the crooked baffle 4 Related, the value range is (0.5-0.8) R 4 . The head end of the clapboard and the isolating tongue 1 are symmetrical about the center of the base circle, and the included angle theta between the tail end and the head end of the clapboard ranges from 160 degrees to 180 degrees.
Fig. 2 is a relation between the head of the twin-volute centrifugal pump and the flow rate under different curvature radiuses R of the curved partition, fig. 3 is a relation between the efficiency of the twin-volute centrifugal pump and the flow rate under different curvature radiuses R of the curved partition, and fig. 4 is a relation between the radial force of the twin-volute centrifugal pump and the flow rate under different curvature radiuses R of the curved partition.
The following is a specific example of implementation: radius of base circle of volute R 4 Is 685mm. The range of the curvature radius R is shown in fig. 2, fig. 3 and fig. 4, which are the relationship between the flow rate, the lift and the radial force of the volute of the centrifugal pump with the curved partition plate and the flow rate under different curved curvature radii R of the partition plate, including the case of the straight partition plate, i.e., R = ∞. It can be seen that the curved baffle increases pump head and efficiency, and reduces impeller radial forces. The magnitude of the lift increases further as the radius of curvature of the bend decreases. When the curvature radius is reduced to 0.8R 4 After that, each performance parameter is not greatly changed. Considering that the reduction of the curvature radius, namely the increase of the bending degree causes the difficulty of the double-volute processing, the value range of the curvature radius R is determined to be (0.5-0.8) R 4 . In this embodiment, the radius of curvature R of the curved partition board has a value range of 0.8R 4 The head end of the bent partition plate and the partition tongue 1 are symmetrical about the center of the base circle, and the included angle theta between the tail end and the head end of the partition plate ranges from 165 degrees.
The utility model discloses a crooked baffle replaces the straight baffle of tradition, and the interior fluid flow law of volute chamber in the reconsitution, the serious phenomenon of volute chamber loss of flow in the two volutes of the straight baffle of tradition is overcome to the effective absorption fluid energy, effectively reduces the radial force that the impeller received when improving pump lift and efficiency.
The foregoing shows and describes the basic principles and principal features of the invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.
Claims (4)
1. A centrifugal pump double-volute with curved partition plates is characterized in that: the centrifugal pump double volute with curved partition comprises: the volute is divided into an inner volute chamber (3) and an outer volute chamber (4) by the partition plate (2);
radius of curvature R of sectional line of middle thickness of curved partition and radius R of base circle of volute 4 The value ranges are as follows: r =0.5R 4 ～0.8R 4 。
2. A centrifugal pump twin-scroll with curved partitions according to claim 1, wherein: the clapboard (2) is bent towards the direction of the outer volute chamber (4).
3. A centrifugal pump twin-scroll with curved partitions according to claim 1, wherein: the head end of the clapboard and the clapboard tongue (1) are symmetrical about the center of the base circle of the volute.
4. A centrifugal pump twin-scroll with curved partitions according to claim 1, wherein: the included angle theta between the tail end and the first section of the clapboard ranges from 160 degrees to 180 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220674317.3U CN218151639U (en) | 2022-03-25 | 2022-03-25 | Centrifugal pump double-volute with bent partition plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220674317.3U CN218151639U (en) | 2022-03-25 | 2022-03-25 | Centrifugal pump double-volute with bent partition plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218151639U true CN218151639U (en) | 2022-12-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220674317.3U Active CN218151639U (en) | 2022-03-25 | 2022-03-25 | Centrifugal pump double-volute with bent partition plate |
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| Country | Link |
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| CN (1) | CN218151639U (en) |
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2022
- 2022-03-25 CN CN202220674317.3U patent/CN218151639U/en active Active
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