CN203770203U - Leak-proof centrifugal pump - Google Patents
Leak-proof centrifugal pump Download PDFInfo
- Publication number
- CN203770203U CN203770203U CN201420113286.XU CN201420113286U CN203770203U CN 203770203 U CN203770203 U CN 203770203U CN 201420113286 U CN201420113286 U CN 201420113286U CN 203770203 U CN203770203 U CN 203770203U
- Authority
- CN
- China
- Prior art keywords
- pump
- spiral
- impeller
- stuffing box
- leak
- 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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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A leak-proof centrifugal pump comprises a pump body, a pump cover, an impeller, a stuffing box, a bearing housing and a spindle, wherein the impeller is arranged in the pump body, the stuffing box is arranged in the pump cover, the bearing housing is connected with the pump cover, and the spindle is arranged in the bearing housing. The spindle is positioned at one end of the pump body and connected with the impeller through a key. The leak-proof centrifugal pump is characterized in that a spiral bar or a projected strip is arranged at the back of the impeller, a groove is formed in the inner surface of the pump cover corresponding to the spiral bar or the projected strip, the stuffing box comprises a spiral sealing sleeve, a graphite sleeve a rubber shaft seal, the spiral sealing sleeve sleeves the spindle, the graphite sleeve sleeves the spiral sealing sleeve, the rubber shaft seal is arranged behind the graphite sleeve, and a spiral groove is formed in the spiral sealing sleeve. The leak-proof centrifugal pump has the advantages that backflow of media can be decreased, output quantity is improved, a low-pressure area is formed at the stuffing box, efficiency is greatly improved, the media in the stuffing box are screwed into a pump cavity, leakage of the media is eliminated, sudden accidents and environmental pollution are avoided, and safety is greatly improved.
Description
Technical field
The utility model relates to a kind of anti-leak centrifugal pump.
Background technique
Existing centrifugal pump is by the pump housing, be arranged on impeller in the pump housing, be arranged on the pump cover on the pump housing, the stuffing box in pump cover, the bearing housing being connected with pump cover and the main shaft that is arranged in bearing housing forms, described main shaft be positioned at pump housing one end and impeller by key be connected, the other end is connected with motor by coupling while using, and in described stuffing box, is provided with mechanical seal device.The problem that this device exists is: a part of medium flows into stuffing box by pump chamber, causes capacity of reflux large, and Efficiency Decreasing easily leaks, and causes sudden accident and environmental pollution.
Summary of the invention
The technical problems to be solved in the utility model is to provide that a kind of capacity of reflux is little, efficiency is high, is difficult for occurring to leak and safe anti-leak centrifugal pump.
The technical solution of the utility model is:
A kind of anti-leak centrifugal pump, by the pump housing, pump cover, be arranged on the impeller in the pump housing, be located at the stuffing box in pump cover, the bearing housing being connected with pump cover and the main shaft of being located in bearing housing form, described main shaft is positioned at pump housing one end and is connected by key with impeller, its special way is: the back side of described impeller is provided with spiral bar or raised line, at the corresponding spiral bar of pump cover internal surface or raised line position, be provided with groove, described stuffing box is by the spiral seal cover being sleeved on main shaft, be sleeved on the graphite cannula that spiral seal puts and be arranged on graphite cannula rubber shaft seal below and form, described spiral seal puts and is provided with interior rotation direction spiral chute.
Described spiral chute is multiple thread groove, further improves backflow effect.
Described spiral seal cover is provided with mechanical seal below, plays safety effect, further prevents dielectric leakage.
The beneficial effects of the utility model are:
1, the back side due to impeller is provided with spiral bar or raised line, can reduce the backflow of medium, improves output quantity, makes formation low pressure area, stuffing box place, greatly raises the efficiency.
2, stuffing box adopts graphite cannula, spiral seal cover and rubber shaft seal, described spiral seal puts and is provided with interior rotation direction spiral chute, makes, in the medium cycle pump chamber of stuffing box, to have eliminated dielectric leakage, be difficult for sudden accident and environmental pollution occur, Security increases greatly.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation (corresponding embodiment 1) of impeller in Fig. 1;
Fig. 3 is the A portion enlarged view of Fig. 1;
Fig. 4 is spiral fluted structural representation in Fig. 3;
Fig. 5 is the structural representation (corresponding embodiment 2) of stuffing box in Fig. 1;
Fig. 6 is the structural representation (corresponding embodiment 3) of impeller in Fig. 1;
In figure: 1 pump housing, 2-pump cover, 201-groove, 3-bearing housing, 4-main shaft, 5-impeller, 501-spiral bar, 502-raised line, 6-spiral seal cover, 601-spiral chute, 7-graphite cannula, 8-rubber shaft seal, 9-mechanical seal.
Embodiment
Embodiment 1
As Fig. 1, shown in Fig. 2 and Fig. 3, the anti-leak centrifugal pump that the utility model relates to, comprise the pump housing 1, pump cover 2, at the interior impeller 5 that arranges of the pump housing 1, in pump cover 2, be provided with stuffing box, on pump cover 2, be bolted bearing housing 3, in bearing housing 3, be provided with main shaft 4, described main shaft 4 is positioned at the pump housing 1 one end and is connected by key with impeller 5, the back side of described impeller 5 is provided with many spiral bars 501, in the corresponding spiral bar of pump cover 2 internal surfaces 501 positions, be provided with groove 201, described stuffing box is by the spiral seal cover 6 being sleeved on main shaft 4, be sleeved on the graphite cannula 7 on spiral seal cover 6 and be arranged on graphite cannula 7 rubber shaft seal 8 below and form, described spiral seal cover 6 is provided with interior rotation direction spiral chute 601.As shown in Figure 4, described spiral chute is multiple thread groove.
During use, main shaft 4 is positioned to the outer one end of bearing housing 3 to be connected with motor by coupling, starting electrical machinery, the main shaft 4 of driven by motor centrifugal pump rotates, thus impeller 5 rotate, with the impeller 5 of spiral bar, will again screw to outlet port from throwing away mouthful medium refluxing, in the small space of pump cover 2, mobile medium is offset the axial force at a part of impeller eye place, the stationarity that increases pump, the reflux medium of pump is obstructed, and reduces in a large number the flow of stuffing box.Remaining medium is in the graphite cannula inwall of stuffing box and the spiral chute of spiral seal cover, and due to the High Rotation Speed of pump, spiral seal cover forms inside thrust, makes these media in narrow and small banded runner inflow pump, makes it not to excessive.
Embodiment 2
As shown in Figure 5, described stuffing box is by being sleeved on spiral seal on main shaft 4 cover 6, be arranged on mechanical seal 9 below of spiral seal cover 6, be sleeved on the graphite cannula 7 on spiral seal cover 6 and be arranged on graphite cannula 7 rubber shaft seal 8 below and form, the other the same as in Example 1.
Embodiment 3
As shown in Figure 6, the back side of described impeller 5 is provided with raised line 502, the other the same as in Example 1.
Claims (3)
1. an anti-leak centrifugal pump, by the pump housing, pump cover, be arranged on the impeller in the pump housing, be located at the stuffing box in pump cover, the bearing housing being connected with pump cover and the main shaft of being located in bearing housing form, described main shaft is positioned at pump housing one end and is connected by key with impeller, it is characterized in that: the back side of described impeller is provided with spiral bar or raised line, at the corresponding spiral bar of pump cover internal surface or raised line position, be provided with groove, described stuffing box is by the spiral seal cover being sleeved on main shaft, be sleeved on the graphite cannula that spiral seal puts and be arranged on graphite cannula rubber shaft seal below and form, described spiral seal puts and is provided with spiral chute.
2. anti-leak centrifugal pump according to claim 1, is characterized in that: described spiral chute is multiple thread groove.
3. anti-leak centrifugal pump according to claim 1, is characterized in that: described spiral seal cover is provided with mechanical seal below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420113286.XU CN203770203U (en) | 2014-03-13 | 2014-03-13 | Leak-proof centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420113286.XU CN203770203U (en) | 2014-03-13 | 2014-03-13 | Leak-proof centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203770203U true CN203770203U (en) | 2014-08-13 |
Family
ID=51287399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420113286.XU Expired - Fee Related CN203770203U (en) | 2014-03-13 | 2014-03-13 | Leak-proof centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203770203U (en) |
-
2014
- 2014-03-13 CN CN201420113286.XU patent/CN203770203U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20140813 Termination date: 20150313 |
|
| EXPY | Termination of patent right or utility model |