CN213511343U - Novel submerged centrifugal pump shaft seal form - Google Patents
Novel submerged centrifugal pump shaft seal form Download PDFInfo
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- CN213511343U CN213511343U CN202022609255.1U CN202022609255U CN213511343U CN 213511343 U CN213511343 U CN 213511343U CN 202022609255 U CN202022609255 U CN 202022609255U CN 213511343 U CN213511343 U CN 213511343U
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Abstract
The utility model relates to the technical field of sealing devices, and provides a novel shaft seal form of a submerged centrifugal pump, which comprises an impeller and a protective plate, wherein the impeller comprises blades and a hub, a slurry channel is arranged between the protective plate and the blades, the protective plate is provided with an installation through hole, the installation through hole is sleeved on the hub, the shaft seal form further comprises a leakage-proof unit, the leakage-proof unit comprises a flow guide block arranged on the outer wall of the hub and a spiral groove arranged on the installation through hole, the direction of the spiral groove is opposite to the rotation direction of the impeller, when the impeller rotates, the slurry is driven to rotate along the direction of the impeller, the slurry overflows along the contact surface of the installation through hole and the hub, the spiral groove arranged on the installation through hole is opposite to the rotation direction of the impeller, when the impeller rotates, the spiral groove provides reverse force for the slurry, the sealing function is achieved, leakage of slurry is greatly reduced, and the problem of pressure loss caused by liquid leakage in the prior art is solved.
Description
Technical Field
The utility model relates to a sealing device technical field especially relates to a novel submerged centrifugal pump bearing seal form.
Background
At present, slurry pumps are widely used in mines, and in industries such as electric power, metallurgy, coal, environmental protection and the like for conveying slurry containing abrasive solid particles. Namely, the slurry pump is mainly used for conveying acidic or abrasive chemical media, and the sealing form of the slurry pump mainly comprises three types: the working principle of the auxiliary impeller seal is that when the slurry pump operates, a working impeller of the slurry pump and the auxiliary impeller which plays a role in sealing rotate coaxially, liquid leaked by the working impeller flows to the auxiliary impeller, and the pressure generated by the action of the auxiliary impeller and the pressure of the leaked liquid are balanced at the top end of the auxiliary impeller and the inner end face of a sealing assembly, so that the leaked liquid plays a role in sealing, pressure loss can be caused by the leaked liquid, and the using effect of the slurry pump is influenced.
Therefore, at present, a person skilled in the art needs to design a novel shaft seal form of the submerged centrifugal pump, so as to reduce or avoid pressure leakage in a pump cavity and improve the use effect of the pump body.
SUMMERY OF THE UTILITY MODEL
The utility model provides a novel submerged centrifugal pump bearing seal form has solved the liquid of leaking among the prior art and can cause loss of pressure's problem.
The technical scheme of the utility model as follows:
the utility model provides a novel centrifugal pump bearing seal form under liquid, includes the impeller, the backplate, the impeller includes blade and wheel hub, the backplate with there is the slurry passageway between the blade, be provided with the installation through-hole on the backplate, the installation through-hole suit sets up on the wheel hub, still include the prevention of liquid leakage unit, the prevention of liquid leakage unit is including setting up water conservancy diversion piece and setting on the wheel hub outer wall are in helicla flute on the installation through-hole, the helicla flute direction with the rotation opposite direction of impeller.
As a further technical scheme, the guide blocks are arranged and evenly distributed along the hub.
As a further technical scheme, the cross section of the flow guide block is rectangular.
As a further technical scheme, the end face of the hub is flush with the end face of the guard plate, and a liquid leakage port is formed at the matching position of the end face of the hub and the end face of the guard plate.
As a further technical scheme, the liquid leakage prevention unit further comprises a water retaining groove, the water retaining groove is arranged at the outlet end of the liquid leakage port, and the notch of the water retaining groove is opposite to the liquid leakage port.
As a further technical scheme, the water retaining groove is formed in the shoulder of the water retaining disc, the diameter of the shoulder is equal to that of the mounting through hole, the height of the notch of the water retaining groove is lower than that of the bottom of the water retaining groove, and the height of the notch of the water retaining groove is higher than that of a gap between the protective plate and the hub.
As a further technical scheme, the water retaining disc is arranged at the outlet end of the liquid leakage port, the water retaining disc is in press fit with the end face of the hub, and the water retaining disc is in clearance fit with the guard plate.
The utility model discloses a theory of operation and beneficial effect do:
the utility model is a novel shaft seal form of a submerged centrifugal pump, a slurry channel is arranged between a protective plate and a blade, the guard plate is provided with an installation through hole which is sleeved on the hub and is provided with a liquid leakage prevention unit, the anti-leakage unit comprises a flow guide block arranged on the outer wall of the hub and a spiral groove arranged on the mounting through hole, the direction of the spiral groove is opposite to the rotating direction of the impeller, by arranging the liquid leakage prevention unit, when the impeller rotates, the slurry is driven to rotate along with the impeller, the slurry overflows along the contact surface of the mounting through hole and the hub, the spiral groove is arranged on the mounting through hole, the spiral direction is opposite to the rotation direction of the impeller, when the impeller of the slurry rotates, the spiral groove provides reverse force for the slurry, so that the slurry flows back to the pump cavity to play a sealing role, the leakage of the slurry is greatly reduced, and the problem of pressure loss caused by liquid leakage in the prior art is solved.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a sectional view of the present invention;
FIG. 2 is an enlarged view of the liquid leakage preventing unit of the present invention;
FIG. 3 is a schematic view of an end face of the wheel hub of the present invention;
FIG. 4 is a cross-sectional view of the installation through hole of the present invention;
in the figure: 1. the impeller comprises an impeller body 2, a protective plate 3, blades 4, a hub 5, a flow guide block 6, a spiral groove 7, a water retaining groove 8, a water retaining disc 9 and an installation through hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive work, are related to the scope of the present invention.
Example 1
As shown in fig. 1-4, a novel shaft seal form of a submerged centrifugal pump comprises an impeller 1 and a guard plate 2, wherein the impeller 1 comprises a blade 3 and a hub 4, a slurry channel is arranged between the guard plate 2 and the blade 3, an installation through hole 9 is arranged on the guard plate 2, the installation through hole 9 is sleeved on the hub 4, the shaft seal form further comprises a liquid leakage prevention unit, the liquid leakage prevention unit comprises a flow guide block 5 arranged on the outer wall of the hub 4 and a spiral groove 6 arranged on the installation through hole 9, and the direction of the spiral groove 6 is opposite to the rotation direction of the impeller 1.
In this embodiment, impeller 1 includes blade 3 and wheel hub 4, impeller 1 passes through wheel hub 4 and sets up the end at the pump shaft, impeller 1 rotates along with the rotation of pump shaft, liquid rotates along with impeller 1's rotation, be provided with installation through-hole 9 on backplate 2, installation through-hole 9 suit sets up on wheel hub 4, liquid leaks along both contact surfaces, cause loss of pressure, leak protection liquid unit includes water conservancy diversion piece 5 and helicla flute 6, liquid is with higher speed because of the effect of centrifugal force, water conservancy diversion piece 5 has certain separation and the effect of carrying to liquid, helicla flute 6 is opposite with impeller 1's direction of rotation, when liquid rotates along with impeller 1 and water conservancy diversion piece 5, flowing liquid flows along helicla flute 6 to the pump chamber in, prevent the liquid outflow, avoided liquid leakage to cause loss of pressure.
As shown in fig. 1 to 3, the plurality of guide blocks 5 are provided, and the guide blocks 5 are uniformly distributed along the hub 4.
In this embodiment, water conservancy diversion piece 5 is along wheel hub 4 evenly distributed for when impeller 1 rotated, the atress is even, and the focus is located the central axis, avoids off-centre to cause impeller 1 wearing and tearing.
As shown in fig. 3, the cross section of the deflector block 5 is rectangular.
In this embodiment, make and form the groove between the adjacent water conservancy diversion piece 5, play separation and the effect of carrying to liquid, avoid excessively smooth-going, liquid can be effectively promoted rotatoryly, improves separation and the effect of carrying to liquid.
As shown in fig. 1 to 2, the end surface of the hub 4 is flush with the end surface of the protector plate 2, and a liquid leakage port is formed at the position where the end surface of the hub 4 is engaged with the end surface of the protector plate 2.
In this embodiment, the terminal surface of wheel hub 4 and the terminal surface parallel and level of backplate 2 form the weeping mouth for the liquid that the weeping mouth flows is concentrated, avoids liquid loss everywhere.
As shown in fig. 1-4, the anti-leakage unit further includes a water retaining groove 7, the water retaining groove 7 is disposed at the outlet end of the leakage port, and the notch of the water retaining groove 7 is disposed opposite to the leakage port.
In this embodiment, water retaining groove 7 sets up the exit end at the weeping mouth, and the notch of water retaining groove 7 sets up with the relative of weeping mouth, and the liquid that the weeping mouth flows down at pressure and the direction of self motion flows into water retaining groove 7, receives the reaction force of water retaining groove 7 cell wall and flows out the notch again, because notch and weeping mouth set up relatively, liquid flows into the weeping mouth again, flows into the pump chamber along with helicla flute 6, to the liquid water conservancy diversion entering pump chamber of leaking, reduces the liquid seepage, avoids loss of pressure.
As shown in fig. 1 to 4, the water blocking groove 7 is arranged at the shoulder of the water blocking disc 8, the shoulder and the mounting through hole have the same diameter, the height of the notch of the water blocking groove 7 is lower than the height of the bottom of the water blocking groove 7, and the height of the notch of the water blocking groove 7 is higher than the height of the gap between the guard plate 2 and the hub 4.
In this embodiment, the height of the notch of the water retaining groove 7 is lower than the height of the groove bottom of the water retaining groove 7, and the height of the notch of the water retaining groove 7 is higher than the height of the gap between the guard plate 2 and the hub 4, so that the leaked liquid can completely flow into the water retaining groove 7, and the leaked liquid is prevented from escaping to other parts, and more of the leaked liquid flows back into the pump cavity.
As shown in fig. 1 to 4, the water blocking disc 8 is arranged at the outlet end of the liquid leakage port, the water blocking disc 8 is in press fit with the end face of the hub 4, and the water blocking disc 8 is in clearance fit with the guard plate 2.
In this embodiment, the water blocking disc 8 is in press fit with the end face of the hub 4, so that liquid leaking from the liquid leakage opening can completely enter the water blocking groove 7, pressure waste caused by long distance of the stroke is avoided, the water blocking disc 8 is in clearance fit with the protection plate 2, pressure action is carried out on the leaked liquid by external liquid pressure, all or more backflow of the leaked liquid enters the pump cavity, and pressure loss is avoided.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a novel centrifugal pump bearing seal form under liquid, includes impeller (1), backplate (2), impeller (1) includes blade (3) and wheel hub (4), backplate (2) with there is the slurry passageway between blade (3), be provided with installation through-hole (9) on backplate (2), installation through-hole (9) suit sets up on wheel hub (4), its characterized in that still includes leak protection liquid unit, leak protection liquid unit is including setting up water conservancy diversion piece (5) and setting on wheel hub (4) outer wall are in helicla flute (6) on installation through-hole (9), helicla flute (6) direction with the rotation opposite direction of impeller (1).
2. The new shaft seal form of the centrifugal pump under liquid as claimed in claim 1, characterized in that there are several said deflector blocks (5), said deflector blocks (5) are evenly distributed along said hub (4).
3. The new form of submersible centrifugal pump shaft seal according to claim 2, characterized by the fact that the cross section of the deflector block (5) is rectangular.
4. The novel submerged centrifugal pump shaft seal form according to claim 1, characterized in that the end face of the hub (4) is flush with the end face of the guard plate (2), and the matching position of the end face of the hub (4) and the end face of the guard plate (2) forms a liquid leakage port.
5. The novel form of the shaft seal of the centrifugal pump under liquid as claimed in claim 4, wherein the leakage preventing unit further comprises a water retaining groove (7), the water retaining groove (7) is disposed at the outlet end of the leakage port, and the notch of the water retaining groove (7) is disposed opposite to the leakage port.
6. The novel form of the submerged centrifugal pump shaft seal of claim 5, characterized in that the water retaining groove (7) is arranged at the shoulder of the water retaining disc (8), the shoulder is of the same diameter as the mounting through hole (9), the notch height of the water retaining groove (7) is lower than the groove bottom height of the water retaining groove (7), and the notch height of the water retaining groove (7) is higher than the gap height between the guard plate (2) and the hub (4).
7. The novel shaft seal form of the submerged centrifugal pump according to claim 6, characterized in that the water-retaining disc (8) is arranged at the outlet end of the liquid leakage port, the water-retaining disc (8) is in press fit with the end face of the hub (4), and the water-retaining disc (8) is in clearance fit with the guard plate (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022609255.1U CN213511343U (en) | 2020-11-12 | 2020-11-12 | Novel submerged centrifugal pump shaft seal form |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022609255.1U CN213511343U (en) | 2020-11-12 | 2020-11-12 | Novel submerged centrifugal pump shaft seal form |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213511343U true CN213511343U (en) | 2021-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022609255.1U Active CN213511343U (en) | 2020-11-12 | 2020-11-12 | Novel submerged centrifugal pump shaft seal form |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213511343U (en) |
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2020
- 2020-11-12 CN CN202022609255.1U patent/CN213511343U/en active Active
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