CN205446140U - Centrifugal pump - Google Patents
Centrifugal pump Download PDFInfo
- Publication number
- CN205446140U CN205446140U CN201521115830.5U CN201521115830U CN205446140U CN 205446140 U CN205446140 U CN 205446140U CN 201521115830 U CN201521115830 U CN 201521115830U CN 205446140 U CN205446140 U CN 205446140U
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- CN
- China
- Prior art keywords
- impeller
- centrifugal pump
- choma
- solid particle
- screw
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Abstract
The utility model belongs to the technical field of fluid machinery. The problem of the easy locking of impeller in order to solve present use centrifugal pump and carry to contain solid particle's fluid medium, the utility model provides a centrifugal pump, choma under the pump body, impeller, ring sum suitable for reading, the inner wall of lower choma is provided with the screw, and this screw revolve to the direction of rotation with the impeller opposite, the thickness of lower choma be 5 -7mm, the screw be square thread, nominal diameter is M1.6 or M1.8, coarse thread tooth distance is 0.35mm, perhaps nominal diameter is 2.0, coarse thread tooth distance is 0.4mm. The utility model discloses in the centrifugal pump working process, the screw can produce the guide effect from the centrifugal pump ante -chamber to the suction chamber to the solid particle in the clearance between lower choma and the impeller, makes solid particle revolving to flowing into the suction chamber along this screw to prevent solid particle and impeller and choma production friction down, prevent that solid particle from blocking the clearance between impeller and the lower choma, thereby prevent the locking of centrifugal pump impeller.
Description
Technical field
This utility model belongs to the technical field of fluid machinery, is specifically related to a kind of centrifugal pump.
Background technology
The operation principle of centrifugal pump is to utilize the rotation of centrifugal pump impeller, forces the fluid media (medium) in blade passage to rotate, and fluid media (medium) is thrown out of outside pump under the influence of centrifugal force.Being widely used of centrifugal pump, may be used for the conveying fluid media (medium) containing solid particle at present.As shown in Figure 1; centrifugal pump includes the pump housing 17, suction chamber 14, impeller 12, delivery chamber 11 and centrifugal pump ante-chamber 13; being provided with choma 15 and lower choma 16 between impeller 12 and the pump housing 17, on this, choma 15 and lower choma 16 are used for protecting impeller 12, to avoid impeller 12 and the direct contact wear of the pump housing 17；Simultaneously in order to prevent from directly contacting between lower choma 16 and impeller 12 friction, between lower choma 16 and impeller 12, leave gap.When using the centrifugal pump conveying fluid media (medium) containing solid particle, fluid media (medium) flows into impeller channel 10 from suction chamber 14, impeller 12 fluid medium is done work, centrifugal action is utilized to be got rid of by fluid media (medium) into delivery chamber 11, fluid media (medium) is outside delivery chamber 11 excavationg pump, wherein, some meeting pump ante-chamber 13 by centrifugation of the fluid media (medium) thrown away by impeller 12, clearance leakage between lower choma 16 and impeller 12 is to suction chamber 14, and fluid media (medium) is when flowing through the gap between end opening ring 16 and impeller 12, solid particle in fluid media (medium) is easy to block the gap between lower choma 16 and impeller 12, cause impeller 12 locking of centrifugal pump.
Utility model content
In order to solve the problem of impeller easy locking when currently used centrifugal pump carries the fluid media (medium) containing solid particle, the utility model proposes a kind of centrifugal pump, to prevent the solid particle in fluid media (medium) from blocking lower gap between choma and impeller, thus prevent centrifugal pump impeller locking.
This utility model centrifugal pump includes the pump housing, impeller, upper choma and lower choma, and the inwall of described lower choma is provided with screw thread, and the rotation direction of this screw thread is contrary with the direction of rotation of described impeller.
Wherein, the thickness of described lower choma is 5-7mm.
Wherein, described screw thread is square thread.
Wherein, the nominal diameter of described screw thread is M1.6 or M1.8, and coarse thread tooth is away from for 0.35mm.
Wherein, the nominal diameter of described screw thread is 2.0, and coarse thread tooth is away from for 0.4mm.
Wherein, the angle of described screw thread is 30 °-60 °.
This utility model centrifugal pump has a following beneficial effect:
The inwall of the lower choma of this utility model centrifugal pump is provided with screw thread, in work process, this screw thread can produce the guide effect from centrifugal pump ante-chamber to suction chamber to the solid particle in the gap between lower choma and impeller, solid particle is made to flow into suction chamber along the rotation direction of this screw thread, to prevent solid particle from producing friction with impeller and lower choma, prevent solid particle from blocking the gap between impeller and lower choma, thus prevent centrifugal pump impeller locking.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing centrifugal pump；
Fig. 2 is the structural representation of this utility model centrifugal pump；
Fig. 3 is the close-up schematic view of part A in Fig. 2.
Detailed description of the invention
Introduce the technical solution of the utility model below in conjunction with the accompanying drawings.
As shown in Fig. 2-Fig. 3, this utility model centrifugal pump includes that the pump housing 17, suction chamber 14, impeller 12 and delivery chamber 11, impeller 12 and the pump housing 17 form centrifugal pump ante-chamber 13, be provided with choma 15 and lower choma 16 between impeller 12 and the pump housing 17.The inwall of lower choma 16 is provided with screw thread 18, and the rotation direction of this screw thread 18 is contrary with the direction of rotation of impeller 12.Wherein, the thickness of lower choma 16 is 5-7mm, if the thickness of lower choma is the thinnest, the performances such as the hardness of lower choma 16 can be produced considerable influence after the inwall of lower choma 16 offers screw thread 18, and the thickness of lower choma 16 is when being 5-7mm, the least to performance impacts such as the hardness of lower choma 16 after the inwall of lower choma 16 offers screw thread 18.Wherein, screw thread 18 can be square thread, and nominal diameter is M1.6, and coarse thread tooth is away from for 0.35mm, or nominal diameter is M1.8, and coarse thread tooth is away from for 0.35mm, or nominal diameter is 2.0, and coarse thread tooth is away from for 0.4mm, and the angle of screw thread 18 is 30 °-60 °.
When using this utility model centrifugal pump conveying fluid media (medium) containing solid particle, fluid media (medium) flows in centrifugal pump from suction chamber 14, the impeller 12 fluid media (medium) acting to flowing into centrifugal pump, centrifugal action is utilized to be got rid of by fluid media (medium) into delivery chamber 11, fluid media (medium) is outside delivery chamber 11 excavationg pump, wherein, the rotation of impeller 12 makes fluid media (medium) create from suction chamber 14 to impeller channel 10 again to the flowing of delivery chamber 11.The fluid media (medium) thrown away by impeller 12 some can leak to centrifugal pump ante-chamber 13, flow into lower gap between choma 16 and impeller 12 again, solid particle in fluid media (medium) also can enter the gap between lower choma 16 and impeller 12, owing to the rotation direction of screw thread 18 is contrary with the direction of rotation of impeller 12, solid particle in the lower choma 16 gap with impeller 12 can be produced from centrifugal pump ante-chamber 13 to the guide effect of suction chamber 14 by screw thread 18, solid particle is made to flow into suction chamber 14 along the rotation direction of screw thread 18, to prevent solid particle from producing friction with impeller 12 and lower choma 16, prevent solid particle from blocking the gap between impeller 12 and lower choma 16, thus prevent centrifugal pump impeller locking.Meanwhile, after lower choma 16 offers screw thread 18, although the leakage rate of centrifugal pump has increase, but increase the least, do not affect the normal work of centrifugal pump.
Claims (6)
1. a centrifugal pump, including the pump housing, impeller, upper choma and lower choma, it is characterised in that the inwall of described lower choma is provided with screw thread, and the rotation direction of this screw thread is contrary with the direction of rotation of described impeller.
Centrifugal pump the most according to claim 1, it is characterised in that the thickness of described lower choma is 5-7mm.
Centrifugal pump the most according to claim 1 and 2, it is characterised in that described screw thread is square thread.
Centrifugal pump the most according to claim 3, it is characterised in that the nominal diameter of described screw thread is M1.6 or M1.8, coarse thread tooth is away from for 0.35mm.
Centrifugal pump the most according to claim 3, it is characterised in that the nominal diameter of described screw thread is 2.0, coarse thread tooth is away from for 0.4mm.
Centrifugal pump the most according to claim 3, it is characterised in that the angle of described screw thread is 30 °-60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521115830.5U CN205446140U (en) | 2015-12-29 | 2015-12-29 | Centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521115830.5U CN205446140U (en) | 2015-12-29 | 2015-12-29 | Centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205446140U true CN205446140U (en) | 2016-08-10 |
Family
ID=56572113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521115830.5U Active CN205446140U (en) | 2015-12-29 | 2015-12-29 | Centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205446140U (en) |
-
2015
- 2015-12-29 CN CN201521115830.5U patent/CN205446140U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |