CN207647829U - A kind of centrifugal pump preventing impeller outlet clearance leakage - Google Patents
A kind of centrifugal pump preventing impeller outlet clearance leakage Download PDFInfo
- Publication number
- CN207647829U CN207647829U CN201721746294.8U CN201721746294U CN207647829U CN 207647829 U CN207647829 U CN 207647829U CN 201721746294 U CN201721746294 U CN 201721746294U CN 207647829 U CN207647829 U CN 207647829U
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- CN
- China
- Prior art keywords
- impeller
- ontology
- pump cover
- centrifugal pump
- clearance leakage
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 239000000411 inducer Substances 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 abstract description 6
- 239000012530 fluid Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a kind of centrifugal pumps preventing impeller outlet clearance leakage, including spiral case, pump cover has been bolted in spiral case, pump cover is connected with inlet tube, impeller is fixed in spiral case, pump cover is located on the outside of impeller, and pump cover is not contacted with impeller, the input end of impeller is connected separately with inducer and main shaft, and inducer is connected with main shaft, impeller both sides are respectively fixed with front shroud of impeller and back shroud of impeller, it is provided with sealing device on the outside of front shroud of impeller and back shroud of impeller, sealing device includes the ontology being fixed on the outside of front shroud of impeller and back shroud of impeller, ontology is annular shape, and the upper surface of ontology is flushed with impeller outlet, ontology is provided with ring-shaped groove on the side surface of pump cover and along the circumferencial direction of ontology.The utility model is simple in structure, easy to use；Effectively reduce the leakage loss of flow；Leakage rate reduces, and forms good sealing effect, improves the working efficiency and working life of centrifugal pump.
Description
Technical field
The utility model belongs to fluid machinery technical field of engineering equipment, is related to a kind of impeller outlet clearance leakage of preventing
Centrifugal pump.
Background technology
At runtime for traditional pump, fluid obtains energy from impeller, and the pressure at impeller outlet is made to be higher than entrance
Pressure, this pressure difference drive segment fluid flow along the gap between impeller eye and body seal ring by outlet return to entering
Mouthful, the energy expenditure obtained from impeller, therefore can not be complete by the theoretical delivery of impeller in overcoming on the resistance of flowing
The full outlet for being transported to pump so that there are larger volume leakage losses for centrifugal pump.There is no go out current centrifugal pump in impeller
Sealing device is installed on mouthful, so there are prodigious leakage losses.Increase with the leakage rate of fluid at impeller outlet, it can be to leaf
Piece entrance generates larger impact, and vorticity increases.Leakage whirlpool at impeller outlet will also result in the turbulent flow of impeller leakage runner
Pulsation, occurs the wild effects such as vibration, noise so as to cause centrifugal pump in the process of running, influences centrifugal pump sealing device fortune
Capable efficiency and security and stability.
Utility model content
The purpose of this utility model is to provide a kind of centrifugal pump preventing impeller outlet clearance leakage, improves centrifugal pump leaf
The clearance leakage for taking turns outlet, improves the volumetric efficiency of centrifugal pump.
The utility model is the technical scheme adopted is that a kind of centrifugal pump preventing impeller outlet clearance leakage, including snail
Pump cover has been bolted in shell, spiral case, and pump cover is connected with inlet tube, and impeller is fixed in spiral case, and pump cover is located on the outside of impeller,
And pump cover is not contacted with impeller, the input end of impeller is connected separately with inducer and main shaft, and inducer is connected with main shaft, impeller
Both sides are respectively fixed with front shroud of impeller and back shroud of impeller, and sealing dress is provided on the outside of front shroud of impeller and back shroud of impeller
It sets, sealing device includes the ontology being fixed on the outside of front shroud of impeller and back shroud of impeller, and ontology is annular shape, and ontology is upper
End face is flushed with impeller outlet, and ontology is provided with ring-shaped groove on the side surface of pump cover and along the circumferencial direction of ontology.
The utility model is also characterized by
Ontology is 0.2mm~0.5mm close to the distance between the side surface of pump cover and pump cover.
Ring-shaped groove is no less than four, and ring-shaped groove is uniformly arranged on the body.
The cone angle of ring-shaped groove is θ, and the angular range of taper angle theta is 35 °~50 °.
The depth of ring-shaped groove is 0.4mm~1.0mm.
The utility model has the beneficial effects that a kind of centrifugal pump structure preventing impeller outlet clearance leakage of the utility model
Simply, easy to use；Stream that one tortuous, that flow resistance is high is formd between sealing device and pump cover in the utility model
Road, when flow is by gap runner between ontology and pump cover, water (flow) direction constantly changes, and generates throttle effect, increases
Resistance to water-flow effectively reduces the leakage loss of flow, and leakage rate reduces, and reduces impact of the flow to impeller eye, is formed
Good sealing effect；Vibrations and the noise for reducing unit, increase the security and stability of unit operation, improve centrifugal pump
Working efficiency and working life.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram for the centrifugal pump for preventing impeller outlet clearance leakage of the utility model；
Fig. 2 is the structural schematic diagram amplified at A in Fig. 1；
Fig. 3 is that the part section of sealing device in a kind of centrifugal pump preventing impeller outlet clearance leakage of the utility model shows
It is intended to.
In figure, 1. pump covers, 2. impellers, 3. ontologies, 4. ring-shaped grooves, 5. spiral cases, 6. inducers, 7. inlet tubes, 8. main shafts,
9. front shroud of impeller, 10. back shroud of impeller.
Specific implementation mode
The utility model is described in detail with reference to the accompanying drawings and detailed description.
A kind of centrifugal pump preventing impeller outlet clearance leakage of the utility model, as shown in Figure 1, including spiral case 5, spiral case 5
Pump cover 1 has been bolted, pump cover 1 is connected with inlet tube 7, and impeller 2 is fixed in spiral case 5, and pump cover 1 is located at 2 outside of impeller,
And pump cover 1 is not contacted with impeller 2, the input end of impeller 2 is connected separately with inducer 6 and main shaft 8, and inducer 6 and main shaft 8 connect
It connects, 2 both sides of impeller are respectively fixed with front shroud of impeller 9 and back shroud of impeller 10, as shown in Fig. 2, after front shroud of impeller 9 and impeller
10 outside of cover board is provided with sealing device, and sealing device includes the sheet for being fixed on 10 outside of front shroud of impeller 9 and back shroud of impeller
Body 3, ontology 3 is annular shape, and the upper surface of ontology 3 and impeller 2 are exported and flushed, and ontology 3 is on the side surface of pump cover 1 and edge
The circumferencial direction of ontology 3 is provided with ring-shaped groove 4, as shown in figure 3, ring-shaped groove 4 is no less than four, and ring-shaped groove 4 is at this
It is uniformly arranged on body 3, the cone angle of ring-shaped groove 4 is θ, and the angular range of taper angle theta is 35 °~50 °, the depth of ring-shaped groove 4
For 0.4mm~1.0mm, ontology 3 is 0.2mm~0.5mm close to the distance between the side surface of pump cover 1 and pump cover 1.
By the above-mentioned means, a kind of centrifugal pump structure preventing impeller outlet clearance leakage of the utility model is simple, use
It is convenient；Runner that one is tortuous, that flow resistance is high is formd between sealing device in the utility model and pump cover 1,
When flow is by gap runner between ontology 3 and pump cover 1, water (flow) direction constantly changes, and generates throttle effect, increases water
Flow resistance power effectively reduces the leakage loss of flow；Reduced velocity flow, leakage rate reduce, and reduce flow and are rushed to impeller eye
It hits, reduces the increase of 2 inlet vorticity of impeller, and form good sealing effect；Vibrations and the noise for reducing unit, increase machine
The security and stability of group operation, improves the working efficiency and working life of centrifugal pump.
Claims (5)
1. a kind of centrifugal pump preventing impeller outlet clearance leakage, which is characterized in that including spiral case (5), the spiral case (5) passes through
It is bolted pump cover (1), the pump cover (1) is connected with inlet tube (7), and impeller (2) is fixed in the spiral case (5), described
Pump cover (1) is located on the outside of impeller (2), and the pump cover (1) is not contacted with impeller (2), and the input end of the impeller (2) connects respectively
It is connected to inducer (6) and main shaft (8), and the inducer (6) and main shaft (8) connection, impeller (2) both sides are respectively fixed with
It is provided with sealing on the outside of front shroud of impeller (9) and back shroud of impeller (10), the front shroud of impeller (9) and back shroud of impeller (10)
Device, the sealing device include being fixed on ontology (3) on the outside of front shroud of impeller (9) and back shroud of impeller (10), described
Body (3) is annular shape, and the upper surface of the ontology (3) is flushed with impeller (2) outlet, and the ontology (3) is close to pump cover (1)
It is provided with ring-shaped groove (4) on side surface and along the circumferencial direction of ontology (3).
2. a kind of centrifugal pump preventing impeller outlet clearance leakage according to claim 1, which is characterized in that the ontology
(3) it is 0.2mm~0.5mm close to the distance between the side surface of pump cover (1) and pump cover (1).
3. a kind of centrifugal pump preventing impeller outlet clearance leakage according to claim 1, which is characterized in that the annular
Groove (4) is no less than four, and the ring-shaped groove (4) is uniformly arranged on ontology (3).
4. a kind of centrifugal pump preventing impeller outlet clearance leakage according to claim 1 or 3, which is characterized in that described
The cone angle of ring-shaped groove (4) is θ, and the angular range of the taper angle theta is 35 °~50 °.
5. a kind of centrifugal pump preventing impeller outlet clearance leakage according to claim 4, which is characterized in that the annular
The depth of groove (4) is 0.4mm~1.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721746294.8U CN207647829U (en) | 2017-12-14 | 2017-12-14 | A kind of centrifugal pump preventing impeller outlet clearance leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721746294.8U CN207647829U (en) | 2017-12-14 | 2017-12-14 | A kind of centrifugal pump preventing impeller outlet clearance leakage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207647829U true CN207647829U (en) | 2018-07-24 |
Family
ID=62880761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721746294.8U Expired - Fee Related CN207647829U (en) | 2017-12-14 | 2017-12-14 | A kind of centrifugal pump preventing impeller outlet clearance leakage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207647829U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764000A (en) * | 2019-02-25 | 2019-05-17 | 江苏大学 | A kind of mixed-flow pump runner envelope with spiral shape pumping groove |
-
2017
- 2017-12-14 CN CN201721746294.8U patent/CN207647829U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764000A (en) * | 2019-02-25 | 2019-05-17 | 江苏大学 | A kind of mixed-flow pump runner envelope with spiral shape pumping groove |
| CN109764000B (en) * | 2019-02-25 | 2020-06-09 | 江苏大学 | Mixed flow pump runner chamber with spiral pumping groove |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180724 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |