CN218563994U - Impeller for multistage pump and balance disc structure multistage pump using same - Google Patents
Impeller for multistage pump and balance disc structure multistage pump using same Download PDFInfo
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- CN218563994U CN218563994U CN202222509145.7U CN202222509145U CN218563994U CN 218563994 U CN218563994 U CN 218563994U CN 202222509145 U CN202222509145 U CN 202222509145U CN 218563994 U CN218563994 U CN 218563994U
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- impeller
- multistage pump
- wheel hub
- hub
- cover plate
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Abstract
The utility model relates to a multistage centrifugal pump field discloses an impeller for multistage pump for balanced dish structure multistage pump, a serial communication port, the impeller includes blade, front shroud, back shroud and wheel hub, and wheel hub's both sides are suction side wheel hub and impeller rear wheel hub respectively, and wheel hub's external diameter is greater than suction side wheel hub external diameter behind the impeller, impeller rear wheel hub terminal surface is higher than the back shroud, impeller rear wheel hub terminal surface and the position phase-match of leading the blade cover. The balance disc structure multistage pump comprises impellers arranged on a shaft, adjacent impellers are spaced through an interstage shaft sleeve, guide vanes are arranged on the outer sides of the impellers in a matched mode, and guide vane sleeves are arranged between the guide vanes and the interstage shaft sleeve. The utility model discloses the advantage lies in multistage pump at the operation in-process, and when the rotor part was followed the axial float, the wheel hub department of impeller contacted earlier with the stator, can prevent that multistage pump rotor part when the float, impeller back shroud outer fringe and stator collide, produce great moment and damage pump equipment.
Description
Technical Field
The utility model relates to a centrifugal pump technical field especially relates to an impeller and use balance disk structure multistage pump of this impeller for multistage pump.
Background
At present, the commonly used multistage centrifugal pump in the market mainly adopts a balance disc structure, the balance disc moves left and right along the axial direction, and the axial force of the multistage pump is balanced by controlling the leakage amount according to the size of a gap between the balance disc and a balance ring.
Referring to fig. 1, the shaft connecting part of the rotor impeller is formed into a whole, and because the pump shafts of the multistage pump are basically flexible shafts, the pump shafts are slightly deformed under the action of centrifugal force during operation, the whole rotor part is deformed, if the rotor moves too much due to the axial force of the multistage pump, the rear cover plate of the impeller collides with the guide vane, and if the collision contact point is close to the outer circle of the impeller, the moment generated by the collision contact point is large, and the formed destructive force is large; if the point of impact contact is close to the impeller hub, it generates little force and causes little destructive force.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above problem, a multistage pump is with impeller and use balance plate structure multistage pump of this impeller is provided, prevents that the multistage pump rotor part when the drunkenness, and impeller back shroud outer fringe and stator collide, produce great moment and damage pump equipment.
The utility model adopts the technical proposal that:
the utility model provides an impeller for multistage pump which characterized in that: the impeller comprises blades, a front cover plate, a rear cover plate and a hub, wherein the suction side hub and the impeller rear hub are respectively arranged on two sides of the hub, the outer diameter of the impeller rear hub is larger than that of the suction side hub, and the end face of the impeller rear hub is higher than that of the rear cover plate.
Furthermore, the outer diameter of the rear hub of the impeller is 10-20 mm larger than that of the suction side hub, and the end face of the rear hub of the impeller is 1-2 mm higher than that of the rear cover plate.
Furthermore, 50-70-degree chamfers are arranged on the outer sides of the outer circles of the front cover plate and the rear cover plate of the impeller, and the maximum remaining thickness of the outer circles of the front cover plate and the rear cover plate is 1/2-2/3 of the thickness of the cover plate, but not less than 3mm.
The utility model also provides an use balance disk structure multistage pump of above-mentioned impeller for multistage pump, balance disk structure multistage pump is including installing at epaxial a plurality of impellers, through interstage axle sleeve interval between the adjacent impeller, the supporting installation stator in the impeller outside, sets up between stator and the interstage axle sleeve and leads the blade cover, a serial communication port, the impeller all adopts aforementioned impeller for multistage pump, impeller rear wheel hub terminal surface and the position phase-match that leads the blade cover, interstage axle sleeve external diameter is the same with suction side wheel hub external diameter.
The utility model has the advantages that:
when the multi-stage pump operates, and the rotor part axially moves, the hub of the impeller contacts the guide vane first, so that the phenomenon that the outer edge of the rear cover plate of the impeller collides with the guide vane to generate large torque to damage pump equipment when the rotor part of the multi-stage pump moves can be prevented. By adopting the impeller and the interstage shaft sleeve structure, the casting and machining difficulty of the impeller is reduced, the material waste rate of the impeller is reduced, and the labor efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of a prior art impeller;
fig. 2 is a schematic structural view of the multistage pump impeller of the present invention;
fig. 3 is a schematic structural view of a balanced disk type multistage pump using the impeller according to the present invention.
The reference numbers in the drawings are respectively:
1. an impeller; 101. A blade;
102. a front cover plate; 103. back cover plate
104. A hub; 104A, a suction side hub;
104B, impeller rear hub; 105. A key slot;
106. chamfering the front cover plate; 107. Chamfering the rear cover plate;
2. an interstage shaft sleeve; 3. A guide vane sleeve;
4. a screw; 5. guide vane
6. A shaft; 7. A key;
8. and a middle section.
Detailed Description
The following describes in detail embodiments of the impeller for a multistage pump and the balance plate structure multistage pump using the impeller of the present invention with reference to the accompanying drawings.
Referring to fig. 2, the impeller 1 for the multistage pump includes blades 101, a front shroud 102, a rear shroud 103, and a hub 104.
The hub 104 is divided into a suction side hub 104A and an impeller rear hub 104B, and the outer diameter of the impeller rear hub 104B is larger than that of the suction side hub 104A. The outer diameter of the impeller rear hub 104B is 10-20 mm larger than that of the suction side hub 104A, and the height from the end face of the impeller rear hub 104B to the rear cover plate 103 is 1-2 mm. The outer sides of the front cover plate 102 and the rear cover plate 103 of the impeller 1 are provided with chamfers 106 and 107, the angles of the chamfers 106 and 107 are 50-70 degrees, and the maximum residual thickness of the outer circles of the front cover plate 102 and the rear cover plate 103 is 1/2-2/3 of the thickness of the cover plates, but is not less than 3mm.
Referring to fig. 3, when the impeller 1 is assembled, the impeller 1 is fixedly connected with the shaft 6 through the key 7, and an interstage sleeve 2 is arranged between an impeller rear hub 104B of the impeller 1 and a suction side hub 104A of the next-stage impeller 1 and is also fixedly connected with the shaft 6 through the key. The outer diameter of the interstage sleeve 2 is the same as the outer diameter of the suction-side hub 104A of the impeller 1. 1 outside of impeller is equipped with supporting stator 5, set up between stator 5 and the stage shaft cover 2 and lead blade cover 3, lead blade cover 3 and install in the hole of stator 5 through screw 4, play the effect of protection stator 5, the outside of stator 5 is equipped with middle section 8, and the excircle of stator 5 is fixed to the cooperation with the hole in middle section 8, should be equipped with the rotation prevention round pin 9.
When the pump works, the pump rotor moves along with the movement of the balance disc, the impeller 1 moves back and forth, when the impeller 1 moves towards the guide vane 5 on the right side, if the instantaneous movement is too large, the rear hub 104B of the impeller contacts with the guide vane sleeve 3 first, and the outer edge of the rear cover plate 103 of the impeller 1 is prevented from colliding with the guide vane 5.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. The utility model provides an impeller for multistage pump which characterized in that: the impeller comprises blades, a front cover plate, a rear cover plate and a hub, wherein the suction side hub and the impeller rear hub are respectively arranged on two sides of the hub, the outer diameter of the impeller rear hub is larger than that of the suction side hub, and the end face of the impeller rear hub is higher than that of the rear cover plate.
2. The impeller for a multistage pump according to claim 1, wherein: the outer diameter of the impeller rear hub is 10-20 mm larger than that of the suction side hub, and the end face of the impeller rear hub is 1-2 mm higher than that of the rear cover plate.
3. The impeller for a multistage pump according to claim 1, wherein: the outer sides of the outer circles of the front cover plate and the rear cover plate of the impeller are provided with 50-70-degree chamfers, and the maximum remaining thickness of the outer circles of the front cover plate and the rear cover plate is 1/2-2/3 of the thickness of the cover plate, but not less than 3mm.
4. The utility model provides a multistage pump of balance plate structure which characterized in that: the multistage pump impeller comprises a plurality of impellers for the multistage pump as claimed in any one of claims 1 to 3, wherein the impellers are arranged on a shaft, adjacent impellers are spaced by an interstage shaft sleeve, guide vanes are arranged outside the impellers in a matching mode, a guide vane sleeve is arranged between each guide vane and the interstage shaft sleeve, the end face of a rear hub of each impeller is matched with the position of the corresponding guide vane sleeve, and the outer diameter of the interstage shaft sleeve is the same as that of a hub on the suction side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222509145.7U CN218563994U (en) | 2022-09-22 | 2022-09-22 | Impeller for multistage pump and balance disc structure multistage pump using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222509145.7U CN218563994U (en) | 2022-09-22 | 2022-09-22 | Impeller for multistage pump and balance disc structure multistage pump using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218563994U true CN218563994U (en) | 2023-03-03 |
Family
ID=85312620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222509145.7U Active CN218563994U (en) | 2022-09-22 | 2022-09-22 | Impeller for multistage pump and balance disc structure multistage pump using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218563994U (en) |
-
2022
- 2022-09-22 CN CN202222509145.7U patent/CN218563994U/en active Active
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