CN211778186U - Centrifugal pump with inducer - Google Patents
Centrifugal pump with inducer Download PDFInfo
- Publication number
- CN211778186U CN211778186U CN202020031247.0U CN202020031247U CN211778186U CN 211778186 U CN211778186 U CN 211778186U CN 202020031247 U CN202020031247 U CN 202020031247U CN 211778186 U CN211778186 U CN 211778186U
- Authority
- CN
- China
- Prior art keywords
- inducer
- pump
- shaft
- impeller
- pump shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000411 inducer Substances 0.000 title claims abstract description 50
- 239000007788 liquid Substances 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000004548 suspo-emulsion Substances 0.000 description 1
Images
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a centrifugal pump with inducer, including the pump body, its characterized in that: the pump body in rotate through the bearing and support the pump shaft, the one end of pump shaft is located outside the pump body, and links to each other with the output shaft of motor through the shaft coupling, the other end key joint of pump shaft has the impeller, still be provided with into the liquid mouth on the pump body, go into the suction side phase-match of liquid mouth and impeller, still be provided with the liquid outlet on the pump body simultaneously, the liquid outlet matches with the side of discharging of impeller, be provided with mechanical seal assembly on the pump shaft, the tip of pump shaft still is connected with the inducer, the inducer is located between liquid outlet and the impeller, and the shaft hole that runs through is seted up at the center of inducer simultaneously, the inducer cup joints on the pump shaft through the shaft hole to through the key-type connection between pump shaft and the inducer, there is fastening nut at the tip threaded connection of pump shaft, and.
Description
Technical Field
The utility model relates to a water pump field, especially a centrifugal pump with inducer.
Background
Water pumps are machines that deliver or pressurize a liquid. It transfers the mechanical energy of prime mover or other external energy to liquid to increase the energy of liquid, mainly used to transport liquid including water, oil, acid-base solution, emulsion, suspoemulsion and liquid metal. The centrifugal pump is one of water pumps, and in the initial stage of work of the centrifugal pump, a low-pressure area in a certain range can be formed in a pump body, so that cavitation can be generated on an impeller and the inner wall of the pump body. This is particularly true in single stage horizontal cantilever pumps. In order to solve the problem, the simplest and most direct method is to add an inducer, the inducer has a structural form equivalent to an axial-flow impeller, can generate a lift of 0.5-5m when rotating, and can reduce the required cavitation allowance NPSHr of a pump body so as to meet the device cavitation allowance NPSHA of a user, so that NPSHa is more than or equal to NPSHr + K (K is a safety allowance and is generally 0.6m at the minimum).
The internal thread is processed to traditional inducer inside, directly screws in the end department of pump shaft through the internal thread, and this kind of connected mode is after the pump body work a period, or the not hard up problem of inducer appears, or the problem that the screw thread locking appears, can't dismantle, causes the damage of seal assembly or pump shaft itself easily.
There is therefore a need for a method or apparatus that addresses the above-mentioned problems.
Disclosure of Invention
The utility model relates to a solve the above-mentioned not enough that prior art exists, provide a simple structure, design benefit, rationally distributed can guarantee the steady and problem-free centrifugal pump of inducer installation under the prerequisite that the cavitation surplus accords with the standard.
The technical solution of the utility model is that: the utility model provides a centrifugal pump with inducer, includes the pump body 1, its characterized in that: a pump shaft 3 is rotatably supported in the pump body 1 through a bearing 2, one end of the pump shaft 3 is positioned outside the pump body 1 and is connected with an output shaft of a motor through a coupling, the other end of the pump shaft 3 is connected with an impeller 4 through a key, the pump body 1 is also provided with a liquid inlet 5, the liquid inlet 5 is matched with the suction side of the impeller 4, meanwhile, the pump body 1 is also provided with a liquid outlet 6, the liquid outlet 6 is matched with the discharge side of the impeller 4, the pump shaft 3 is provided with a mechanical sealing component 7,
the tip of pump shaft 3 still is connected with inducer 8, inducer 8 is located between liquid outlet 6 and the impeller 4, and the shaft hole that runs through is seted up at the center of inducer 8 simultaneously, and inducer 8 cup joints on the pump shaft 3 through the shaft hole to be connected through key 9 between pump shaft 3 and the inducer 8, have fastening nut 10 at the tip threaded connection of pump shaft 3, and still be provided with gasket 11 between fastening nut 10 and inducer 8.
Compared with the prior art, the utility model, have following advantage:
the centrifugal pump with the inducer in the structural form has the advantages of simple structure, ingenious design and reasonable layout, and aims at various problems exposed in the use process of the traditional centrifugal pump with the inducer, a special structure is designed, the inducer is directly machined on the inducer, the inducer is directly sleeved at the end part of a pump shaft by utilizing the through hole, the inducer and the pump shaft are connected through an independent key, and then the inducer is fixed on the pump shaft by utilizing a fastening nut. Meanwhile, the manufacturing process is simple, the manufacturing cost is low, so that the novel LED lamp has various advantages, is particularly suitable for popularization and application in the field, and has a very wide market prospect.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The following description will explain embodiments of the present invention with reference to the drawings. As shown in fig. 1: a centrifugal pump with an inducer comprises a pump body 1, a pump shaft 3 is rotatably supported in the pump body 1 through a bearing 2, one end of the pump shaft 3 is positioned outside the pump body 1 and is connected with an output shaft of a motor through a coupler, the other end of the pump shaft 3 is in key connection with an impeller 4, a liquid inlet 5 is also arranged on the pump body 1, the liquid inlet 5 is matched with the suction side of the impeller 4, a liquid outlet 6 is also arranged on the pump body 1, the liquid outlet 6 is matched with the discharge side of the impeller 4, a mechanical sealing assembly 7 is arranged on the pump shaft 3,
the tip of pump shaft 3 still is connected with inducer 8, inducer 8 is located between liquid outlet 6 and the impeller 4, and the shaft hole that runs through is seted up at the center of inducer 8 simultaneously, and inducer 8 cup joints on the pump shaft 3 through the shaft hole to be connected through key 9 between pump shaft 3 and the inducer 8, have fastening nut 10 at the tip threaded connection of pump shaft 3, and still be provided with gasket 11 between fastening nut 10 and inducer 8.
The utility model discloses centrifugal pump with inducer working process as follows: starting a motor, wherein an output shaft of the motor drives a pump shaft 3 to rotate through a coupling, further drives an impeller 4 at the end part of the pump shaft 3 and an inducer 8 to rotate together, and sucks a liquid medium into the pump body 1 from a liquid inlet 5 under the combined action of the inducer 8 and the impeller 4, and finally discharges the liquid medium through a liquid outlet 6;
due to the inducer 8, the centrifugal pump can effectively reduce the required cavitation allowance NPSHr of the pump body so as to meet the requirement of the device cavitation allowance NPSHA of a user, namely NPSHa is larger than or equal to NPSHr + K (K is a safety allowance and is generally 0.6m at the minimum).
Because the inducer 8 is provided with a through shaft hole and is sleeved on the pump shaft 3 through the shaft hole, the connection mode is relatively stable, the torque transmission is very smooth, one end of the inducer 8 is abutted against the impeller 4, and the other end of the inducer is positioned through the fastening nut 10, so that the front end of the inducer 8 cannot deviate; and the disassembly is very convenient.
Claims (1)
1. The utility model provides a centrifugal pump with inducer, includes the pump body (1), its characterized in that: the pump is characterized in that a pump shaft (3) is rotatably supported in the pump body (1) through a bearing (2), one end of the pump shaft (3) is positioned outside the pump body (1) and is connected with an output shaft of a motor through a coupler, the other end of the pump shaft (3) is in key connection with an impeller (4), a liquid inlet (5) is further formed in the pump body (1), the liquid inlet (5) is matched with a suction side of the impeller (4), a liquid outlet (6) is further formed in the pump body (1), the liquid outlet (6) is matched with a discharge side of the impeller (4), a mechanical sealing assembly (7) is arranged on the pump shaft (3),
the tip of pump shaft (3) still is connected with inducer (8), inducer (8) are located between liquid outlet (6) and impeller (4), and the shaft hole that runs through is seted up at the center of inducer (8) simultaneously, and inducer (8) cup joint on pump shaft (3) through the shaft hole to be connected through key (9) between pump shaft (3) and inducer (8), have fastening nut (10) at the tip threaded connection of pump shaft (3), and still be provided with gasket (11) between fastening nut (10) and inducer (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020031247.0U CN211778186U (en) | 2020-01-08 | 2020-01-08 | Centrifugal pump with inducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020031247.0U CN211778186U (en) | 2020-01-08 | 2020-01-08 | Centrifugal pump with inducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211778186U true CN211778186U (en) | 2020-10-27 |
Family
ID=72888003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020031247.0U Expired - Fee Related CN211778186U (en) | 2020-01-08 | 2020-01-08 | Centrifugal pump with inducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211778186U (en) |
-
2020
- 2020-01-08 CN CN202020031247.0U patent/CN211778186U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 116000 no.218, Zhuoyue street, sanjianbao street, Lushunkou District, Dalian City, Liaoning Province Patentee after: Dalian Shuanglong Pump Group Co.,Ltd. Address before: 116000 no.218, Zhuoyue street, sanjianbao street, Lushunkou District, Dalian City, Liaoning Province Patentee before: DALIAN SONGLONG PUMP MADING Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201027 |