CN201068886Y - Steel ball type parking seal device for pump - Google Patents
Steel ball type parking seal device for pump Download PDFInfo
- Publication number
- CN201068886Y CN201068886Y CNU2007200909556U CN200720090955U CN201068886Y CN 201068886 Y CN201068886 Y CN 201068886Y CN U2007200909556 U CNU2007200909556 U CN U2007200909556U CN 200720090955 U CN200720090955 U CN 200720090955U CN 201068886 Y CN201068886 Y CN 201068886Y
- Authority
- CN
- China
- Prior art keywords
- pump
- sealing
- disk
- axle
- steel ball
- 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
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a steel-ball type parking sealing device of a pump, which comprises a hollow disk arranged on and driven to rotate by a pump axle and a steel ball. The length in axle direction is shorter and shorter outwards along the radial direction until less than the diameter of the steel ball. The disk surface of the hollow disk at the side near the pump body is a removable disk which can do reciprocating movement in axle direction along the pump axle. The sealing disk of the rear end cover of the pump body is sleeved on the axle sleeve of the removable disk in clearance way. A removable sealing disk which is arranged on the pump axle can cooperate with the sealing disk of the rear end cover of the pump body in sealing way and can do reciprocating movement in axle direction along the pump axle. A pressure spring is sleeved on the pump axle arranged on the back of the removable sealing disk. The utility model has the advantages that when a centrifugal pump is working, the sealing surface of the sealing disk of the rear end cover of the pump body can be separated from that of the removable sealing disk, thereby improving the service lives of two sealing surfaces. When the pump body stops working, under the effect of the pressure spring, the removable sealing disk achieves the mechanical sealing with the sealing disk of the rear end cover of the pump body, thereby stopping sealing.
Description
Technical field
The utility model relates to centrifugal pump, especially relates to steel ball type pump parking sealing arrangement.
Background technique
What the pump shaft of centrifugal pump and the sealing between the pump housing were generally adopted at present is that a pair impeller adds soft packing or a pair impeller adds mechanical seal.Pay when impeller adds that the soft packing seal mode tends to because of the sclerosis (wear out) of filler and causes shutdown and leak in a large number; Pay the damage that impeller adds mechanical seal mode Chang Yinwei mechanical sealing surface and make and lose seal action after shutting down.
The model utility content
The utility model purpose is to provide a kind of steel ball type pump parking sealing arrangement of good sealing effect.
For achieving the above object, the utility model can be taked following technical proposals:
Steel ball type pump parking sealing arrangement described in the utility model, it comprises and being arranged on the pump shaft and by the hollow disc of described pump shaft driven rotary be arranged on the steel ball of described hollow disc inner chamber; The axial length of this hollow disc inner chamber radially outwards is decreased to the diameter less than steel ball gradually; Hollow disc is can be along the displacement disc of pump shaft axially reciprocating near the card of the pump housing one side, and pump housing rear end cover seal disc gap is sleeved on the axle sleeve of described displacement disc; Pump shaft is provided with pump housing rear end cover seal disc and is sealed and matched and can be along the hydrodynamic reciprocating sealing dish of pump shaft axially reciprocating; On the pump shaft at the described hydrodynamic reciprocating sealing dish back side, be set with pressure spring.
The utility model advantage be to be arranged on the pump shaft and by its driven rotary, have the hollow disc of trapezoidal inner chamber, and hollow disc be set near the card of the pump housing one side can be along the displacement disc structure of pump shaft axially reciprocating; When therefore centrifugal pump is worked, steel ball squeezes in the motion of centrifugal action lower edge radially outward and pushes away described displacement disc, promote displacement disc and move the elastic force that overcomes pressure spring vertically, sealing surface between pump housing rear end cover seal disc and the described hydrodynamic reciprocating sealing dish is separated, make not phase mutual friction between two sealing surfaces, the working life of having improved two sealing surfaces; And when the pump housing quit work, steel ball lost centrifugal action, and the hydrodynamic reciprocating sealing dish is realized mechanical seal with pump housing rear end cover seal disc under the pressure spring effect, stop sealing purpose thereby reach.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
As shown in the figure, steel ball type pump parking sealing arrangement described in the utility model, it comprises and being arranged on the pump shaft 1 and by the hollow disc of described pump shaft 1 driven rotary be arranged on the steel ball 3 of described hollow disc inner chamber 2; The axial length of this hollow disc inner chamber 2 radially outwards is decreased to the diameter less than steel ball 3 gradually; Hollow disc is can be along the displacement disc 4 of pump shaft 1 axially reciprocating near the card of the pump housing one side, and pump housing rear end cover seal disc 5 gaps are sleeved on the axle sleeve 6 of described displacement disc 4; Pump shaft 1 is provided with pump housing rear end cover seal disc 5 and is sealed and matched and can be along the hydrodynamic reciprocating sealing dish 7 of pump shaft 1 axially reciprocating; On the pump shaft 1 at described hydrodynamic reciprocating sealing dish 7 back sides, be set with pressure spring 8.
Claims (1)
1. steel ball type pump parking sealing arrangement is characterized in that: it comprises and is arranged on that pump shaft (1) is gone up and by the hollow disc of described pump shaft (1) driven rotary be arranged on the steel ball (3) of described hollow disc inner chamber (2); The axial length of this hollow disc inner chamber (2) radially outwards is decreased to the diameter less than steel ball (3) gradually; Hollow disc is can be along the displacement disc (4) of pump shaft (1) axially reciprocating near the card of the pump housing one side, and pump housing rear end cover seal disc (5) gap is sleeved on the axle sleeve (6) of described displacement disc (4); Pump shaft (1) is provided with pump housing rear end cover seal disc (5) and is sealed and matched and can be along the hydrodynamic reciprocating sealing dish (7) of pump shaft (1) axially reciprocating; On the pump shaft (1) at described hydrodynamic reciprocating sealing dish (7) back side, be set with pressure spring (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200909556U CN201068886Y (en) | 2007-07-05 | 2007-07-05 | Steel ball type parking seal device for pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200909556U CN201068886Y (en) | 2007-07-05 | 2007-07-05 | Steel ball type parking seal device for pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201068886Y true CN201068886Y (en) | 2008-06-04 |
Family
ID=39490270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200909556U Expired - Fee Related CN201068886Y (en) | 2007-07-05 | 2007-07-05 | Steel ball type parking seal device for pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201068886Y (en) |
-
2007
- 2007-07-05 CN CNU2007200909556U patent/CN201068886Y/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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080604 |