CN204041528U - A kind of multistage pump of automatically balancing axial force - Google Patents
A kind of multistage pump of automatically balancing axial force Download PDFInfo
- Publication number
- CN204041528U CN204041528U CN201420481870.0U CN201420481870U CN204041528U CN 204041528 U CN204041528 U CN 204041528U CN 201420481870 U CN201420481870 U CN 201420481870U CN 204041528 U CN204041528 U CN 204041528U
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- CN
- China
- Prior art keywords
- impeller
- pump
- choma
- axial force
- 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
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Abstract
The utility model relates to a kind of multistage pump of automatically balancing axial force, this multistage pump comprises motor, coupling, impeller, pump shaft, axle sleeve, sliding shaft sleeve, impeller preoral loop, choma and the pump housing after impeller, described pump shaft is arranged in the pump housing, one end of pump shaft is connected to motor by coupling, the other end is provided with axle sleeve, also sliding shaft sleeve is provided with between described axle sleeve and the pump housing, described impeller set is contained on pump shaft, the two ends of described impeller are respectively equipped with choma after integrated impeller preoral loop and impeller, after described impeller, the diameter of choma is 1.2 ~ 1.3 times of impeller preoral loop diameter, after described impeller, the upper-end surface of choma is also provided with annular groove.Compared with prior art, the utility model, by the size of choma after change impeller preoral loop and impeller, produces compression face product moment, is conducive to balancing axial thrust, effectively can reduces the leakage rate of pump, thus improves the efficiency of pump.
Description
Technical field
The utility model belongs to multistage pump technical field, relates to a kind of multistage pump of automatically balancing axial force.
Background technique
At present, the impeller forward and backward choma size of the multistage pump on market is substantially identical, but when processing impeller and stator, inevitably can there is machining error.In the using process of multistage pump, the axial force of pump just cannot complete equilibrium, and the rotor part such as impeller and pump shaft, inherently have certain weight, this is when progression is more, and the counterbalance effect of axial force is poorer, so, axial force duty ratio in operation process suffered by motor comparatively large (progression is more much larger), this can reduce the working life of motor bearings greatly, increases the working service cost of client.
Summary of the invention
The purpose of this utility model is exactly provide a kind of structure simple and can balance the multistage pump of most of axial force to overcome defect that above-mentioned prior art exists.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of multistage pump of automatically balancing axial force, this multistage pump comprises motor, coupling, impeller, pump shaft, axle sleeve, sliding shaft sleeve, impeller preoral loop, choma and the pump housing after impeller, described pump shaft is arranged in the pump housing, one end of pump shaft is connected to motor by coupling, the other end is provided with axle sleeve, also sliding shaft sleeve is provided with between described axle sleeve and the pump housing, described impeller set is contained on pump shaft, the two ends of described impeller are respectively equipped with choma after integrated impeller preoral loop and impeller, after described impeller, the diameter of choma is 1.2 ~ 1.3 times of impeller preoral loop diameter, after described impeller, the upper-end surface of choma is also provided with annular groove.
Return port is provided with between the inlet segment of described impeller channel and annular groove.
Radial clearance is provided with between described impeller and pump housing inwall.
After described impeller preoral loop and impeller choma outer wall on be arranged with stator, be provided with cavity between described stator and the pump housing, described cavity is connected with the water exit end of impeller channel.
During work, due to the diameter of choma after impeller larger than the diameter of impeller preoral loop 20 ~ 30%, the pressure that the pressure produced during pump running bears than the front shroud of impeller at the back shroud of impeller is smaller, pump rotor can be made like this to carry out suspension running, simultaneously, after liquid flows out from impeller channel, radial clearance can be flowed through, at this moment certain Pressure Drop can be produced, after liquid flows out radial clearance, the inlet segment of impeller channel is back to again through cavity and return port, and then make the axial force suffered by impeller two ends identical, namely the effect balancing most of axial force is reached.
Compared with prior art, the utility model has following characteristics:
1., by the size of choma after change impeller preoral loop and impeller, produce compression face product moment, be conducive to balancing axial thrust;
2. effectively can reduce the leakage rate of pump, thus improve the efficiency of pump.
Accompanying drawing explanation
Fig. 1 is the structural representation of the multistage pump of a kind of automatically balancing axial force of the utility model;
Description of symbols in figure:
Choma, 10-impeller preoral loop, 11-annular groove, 12-return port, 13-cavity after the 1-pump housing, 2-sliding shaft sleeve, 3-axle sleeve, 4-pump shaft, 5-impeller, 6-stator, 7-coupling, 8-motor, 9-impeller.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Embodiment:
As shown in Figure 1, a kind of multistage pump of automatically balancing axial force, this multistage pump comprises motor 8, coupling 7, impeller 5, pump shaft 4, axle sleeve 3, sliding shaft sleeve 2, impeller preoral loop 10, choma 9 and the pump housing 1 after impeller, pump shaft 4 is arranged in the pump housing 1, one end of pump shaft 4 is connected to motor 8 by coupling 7, the other end is provided with axle sleeve 3, sliding shaft sleeve 2 is also provided with between axle sleeve 3 and the pump housing 1, impeller 5 is sleeved on pump shaft 4, the two ends of impeller 5 are respectively equipped with choma 9 after integrated impeller preoral loop 10 and impeller, after impeller, the diameter of choma 9 is 1.2 ~ 1.3 times of impeller preoral loop 10 diameter, after impeller, the upper-end surface of choma 9 is also provided with annular groove 11.Return port 12 is provided with between the inlet segment of impeller 5 runner and annular groove 11.Radial clearance is provided with between impeller 5 and the pump housing 1 inwall.After impeller preoral loop 10 and impeller choma 9 outer wall on be arranged with stator 6, be provided with cavity 13 between stator 6 and the pump housing 1, cavity 13 is connected with the water exit end of impeller 5 runner.
During work, because the diameter of choma after impeller 9 is larger than the diameter of impeller preoral loop 10, the pressure that the pressure produced during pump running bears than the front shroud of impeller 5 at the back shroud of impeller 5 is smaller, pump rotor can be made like this to carry out suspension running, simultaneously, after liquid flows out from impeller 5 runner, radial clearance can be flowed through, at this moment certain Pressure Drop can be produced, after liquid flows out radial clearance, the inlet segment of impeller 5 runner is back to again through cavity 13 and return port 12, and then make the axial force suffered by impeller 5 two ends identical, namely the effect balancing most of axial force is reached.
Claims (4)
1. the multistage pump of an automatically balancing axial force, this multistage pump comprises motor (8), coupling (7), impeller (5), pump shaft (4), axle sleeve (3), sliding shaft sleeve (2), impeller preoral loop (10), choma (9) and the pump housing (1) after impeller, described pump shaft (4) is arranged in the pump housing (1), one end of pump shaft (4) is connected to motor (8) by coupling (7), the other end is provided with axle sleeve (3), sliding shaft sleeve (2) is also provided with between described axle sleeve (3) and the pump housing (1), described impeller (5) is sleeved on pump shaft (4), it is characterized in that, the two ends of described impeller (5) are respectively equipped with choma (9) after integrated impeller preoral loop (10) and impeller, after described impeller, the diameter of choma (9) is 1.2 ~ 1.3 times of impeller preoral loop (10) diameter, after described impeller, the upper-end surface of choma (9) is also provided with annular groove (11).
2. the multistage pump of a kind of automatically balancing axial force according to claim 1, is characterized in that, is provided with return port (12) between the inlet segment of described impeller (5) runner and annular groove (11).
3. the multistage pump of a kind of automatically balancing axial force according to claim 1, is characterized in that, is provided with radial clearance between described impeller (5) and the pump housing (1) inwall.
4. the multistage pump of a kind of automatically balancing axial force according to claim 1, it is characterized in that, after described impeller preoral loop (10) and impeller choma (9) outer wall on be arranged with stator (6), be provided with cavity (13) between described stator (6) and the pump housing (1), described cavity (13) is connected with the water exit end of impeller (5) runner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420481870.0U CN204041528U (en) | 2014-08-25 | 2014-08-25 | A kind of multistage pump of automatically balancing axial force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420481870.0U CN204041528U (en) | 2014-08-25 | 2014-08-25 | A kind of multistage pump of automatically balancing axial force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204041528U true CN204041528U (en) | 2014-12-24 |
Family
ID=52242197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420481870.0U Expired - Fee Related CN204041528U (en) | 2014-08-25 | 2014-08-25 | A kind of multistage pump of automatically balancing axial force |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204041528U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640732A (en) * | 2016-12-27 | 2017-05-10 | 重庆博张机电设备有限公司 | Molten salt pump |
| CN109974962A (en) * | 2019-04-25 | 2019-07-05 | 中国空气动力研究与发展中心低速空气动力研究所 | A kind of scaling method of the effective forced area of labyrinth seal |
-
2014
- 2014-08-25 CN CN201420481870.0U patent/CN204041528U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640732A (en) * | 2016-12-27 | 2017-05-10 | 重庆博张机电设备有限公司 | Molten salt pump |
| CN109974962A (en) * | 2019-04-25 | 2019-07-05 | 中国空气动力研究与发展中心低速空气动力研究所 | A kind of scaling method of the effective forced area of labyrinth seal |
| CN109974962B (en) * | 2019-04-25 | 2023-10-13 | 中国空气动力研究与发展中心低速空气动力研究所 | Calibration method for effective stress area of labyrinth seal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20141224 Termination date: 20210825 |