CN209067489U - A kind of multi-level pump impeller assembling structure - Google Patents
A kind of multi-level pump impeller assembling structure Download PDFInfo
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- CN209067489U CN209067489U CN201821783854.1U CN201821783854U CN209067489U CN 209067489 U CN209067489 U CN 209067489U CN 201821783854 U CN201821783854 U CN 201821783854U CN 209067489 U CN209067489 U CN 209067489U
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- blade
- pump shaft
- volute casing
- annular groove
- pump
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Abstract
The utility model discloses a kind of multi-level pump impeller assembling structures, the roof and side wall of volute casing are equipped with the gap for allowing blade radial and axial float between the outer end of blade and side respectively, the volute casing two sidewalls are respectively equipped with the opposite annular groove of notch, the depth direction of annular groove is axially parallel with pump shaft, the distance between cell wall of the annular groove far from pump shaft and pump shaft are greater than at a distance from blade outer end and pump shaft, and horizontal distance of the annular groove between the volute casing side wall and blade side that the cell wall of pump shaft connects is greater than and annular groove is far from the horizontal distance between the cell wall of the pump shaft volute casing side wall to connect and blade side.It is such, it is equipped with the gap for allowing blade radial and axial float between the outer end of blade and side respectively by the roof and side wall of volute casing, so that blade has the amount of altering enough axially and radially, and by the way of integrally casting shaping, processing capacity is reduced, it is last only to correct volute casing with lathe tool.
Description
Technical field
The utility model belongs to multistage pump technical field more particularly to a kind of multi-level pump impeller assembling structure.
Background technique
Multistage pump is one kind of centrifugal pump, is to obtain centrifugal force in the indoor rotation of snail by impeller, suitably alters
Amount is one of the condition of multistage pump safe operation, the amount of altering deficiency will cause impeller blade and pump case shell seriously contact so as to cause
Damage, wherein length is longer due to the pump case monoblock cast of BB3, BB5 type multistage pump, casts total shrinkage and impeller blade
It is inconsistent in the amount of altering of the indoor axial direction of snail, therefore blade is easy to appear without the amount of altering in assembly.Since pump case is longer,
It casts total shrinkage and is unable to controllable precise, axially the amount of altering meets requirement in order to make final impeller, in practical operation, often
Processing capacity is all reserved in pump case, it is uncontrollable between the guarantee amount of altering to meet casting contraction by the processing to reserved processing capacity
Contradiction.Traditional multi-level pump impeller assembling structure is as shown in attached drawing 1 or attached drawing 2, and in attached structure shown in FIG. 1, volute casing 1 is first
Then casting and forming before this processes heavy platform in the two side walls of volute casing 1, altering for needs is constituted between heavy platform bottom surface and blade
Magnitude, although this structure can satisfy the requirement for the amount of altering, but the processing capacity that the later period is processed using lathe tool is big, time-consuming and laborious.?
In attached structure shown in Fig. 2, the whole integrally casting shaping of volute casing 1, volute casing inner wall is cast into inclined-plane in advance, on inclined-plane close to center
Processing capacity is reserved at that end of position, is finally again machined away reserved processing capacity with lathe tool, although this structure entirety of Fig. 2
Processing capacity is small, but since volute casing is inclined-plane, inclined-plane is smaller with impeller clearance far from that end of centre, is easy to cause blade-side
Without the amount of altering between face and inclined-plane top.
Utility model content
In view of the above shortcomings of the prior art, the technical problem to be solved by the utility model is to how to provide a kind of add
Work amount is few and can guarantee that blade alters the multi-level pump impeller assembling structure of quantity space.
In order to solve the above-mentioned technical problem, the utility model uses the following technical solution:
A kind of multi-level pump impeller assembling structure, including pump case are equipped with pump shaft along axial direction at pump case center, cover on pump shaft
Equipped with multi-stage impeller, pump case has to be located in corresponding volute casing with the one-to-one volute casing of impeller, all blades of each impeller,
The volute casing is integrally formed while pump case casting and forming, the roof and side wall of volute casing are respectively between the outer end of blade and side
Equipped with the gap for allowing blade radial and axial float, the volute casing two sidewalls are respectively equipped with the opposite annular groove of notch, ring
The depth direction of connected in star is axially parallel with pump shaft, and the distance between cell wall of the annular groove far from pump shaft and pump shaft are greater than
The water that blade outer end is at a distance from pump shaft and annular groove is between the volute casing side wall that the cell wall of pump shaft connects and blade side
Flat distance is greater than and annular groove is far from the horizontal distance between the cell wall of the pump shaft volute casing side wall to connect and blade side.
It is such, it is equipped between the outer end of blade and side respectively by the roof and side wall of volute casing and allows blade radial
With the gap of axial float so that blade has the amount of altering axially and radially enough, and by the way of integrally casting shaping,
Processing capacity is reduced, last only to correct volute casing with lathe tool, when solving the axial amount of altering, volute casing passes through the one in casting
Form annular groove, remove from and reuse the step of lathe tool is largely processed, cell wall of the annular groove far from pump shaft and pump shaft it
Between distance be greater than blade outer end at a distance from pump shaft and volute casing side wall and blade that annular groove connects close to the cell wall of pump shaft
Horizontal distance between side is greater than and annular groove is far between the cell wall of the pump shaft volute casing side wall to connect and blade side
Horizontal distance, this structure form enough axial direction amounts of altering required for blade.At the beginning of casting and annular groove is close to pump shaft
The cell wall volute casing side wall to connect and blade side between horizontal distance be equal to and annular groove connect far from the cell wall of pump shaft
Volute casing side wall and blade side between horizontal distance, this structure only need process and annular groove close to pump shaft cell wall phase
The volute casing side wall connect is allowed to the snail that the horizontal distance between blade side is greater than and annular groove connects far from the cell wall of pump shaft
Horizontal distance between room side wall and blade side thus ensure that casting is shunk by the processing of pre- allowance after casting
Amount will not influence the amount of altering of blade, and making impeller in the axial direction has enough amounts of altering, and processing capacity is small.
Detailed description of the invention
Fig. 1 is traditional multi-level pump impeller assembling structure cross-sectional view；
Fig. 2 is another traditional multi-level pump impeller assembling structure cross-sectional view；
Fig. 3 is the cross-sectional view of the utility model embodiment.
Specific embodiment
Below with reference to example attached drawing, the utility model is described in further detail.
When specific implementation: referring to Fig. 3, a kind of multi-level pump impeller assembling structure, including pump case 2, at 2 center of pump case along axial direction
Be equipped with pump shaft 3, be arranged with multi-stage impeller on pump shaft 3, pump case 1 have with the one-to-one volute casing 1 of impeller, each impeller
All blades 4 are located in corresponding volute casing 1, and 2 casting and forming of pump case while is integrally formed the volute casing 1, the roof of volute casing 1 and
Side wall is equipped with the gap for allowing blade radial and axial float, 1 two sides of volute casing between the outer end and side of blade 4 respectively
Wall is respectively equipped with the opposite annular groove 5 of notch, the depth direction of annular groove 5 and axial parallel, the annular groove of pump shaft 3
The distance between 5 cell wall far from pump shaft 3 and pump shaft 3 are greater than at a distance from 4 outer end of blade and pump shaft 3 and annular groove 5 is close to pump
Horizontal distance between the cell wall of axis 1 side wall of volute casing to connect and 4 side of blade is greater than and slot of the annular groove 5 far from pump shaft 3
Horizontal distance between wall 1 side wall of volute casing to connect and 4 side of blade.
It is such, it is equipped between the outer end of blade and side respectively by the roof and side wall of volute casing and allows blade radial
With the gap of axial float so that blade has the amount of altering axially and radially enough, and by the way of integrally casting shaping,
Processing capacity is reduced, last only to correct volute casing with lathe tool, when solving the axial amount of altering, volute casing passes through the one in casting
Form annular groove, remove from and reuse the step of lathe tool is largely processed, cell wall of the annular groove far from pump shaft and pump shaft it
Between distance be greater than blade outer end at a distance from pump shaft and volute casing side wall and blade that annular groove connects close to the cell wall of pump shaft
Horizontal distance between side is greater than and annular groove is far between the cell wall of the pump shaft volute casing side wall to connect and blade side
Horizontal distance, this structure form enough axial direction amounts of altering required for blade.At the beginning of casting and annular groove is close to pump shaft
The cell wall volute casing side wall to connect and blade side between horizontal distance be equal to and annular groove connect far from the cell wall of pump shaft
Volute casing side wall and blade side between horizontal distance, this structure only need process and annular groove close to pump shaft cell wall phase
The volute casing side wall connect is allowed to the snail that the horizontal distance between blade side is greater than and annular groove connects far from the cell wall of pump shaft
Horizontal distance between room side wall and blade side thus ensure that casting is shunk by the processing of pre- allowance after casting
Amount will not influence the amount of altering of blade, and making impeller in the axial direction has enough amounts of altering, and processing capacity is small.
Claims (1)
1. a kind of multi-level pump impeller assembling structure, including pump case are equipped with pump shaft along axial direction at pump case center, are arranged on pump shaft
There is multi-stage impeller, pump case has to be located in corresponding volute casing with the one-to-one volute casing of impeller, all blades of each impeller, is pumped
The volute casing is integrally formed while shell casting and forming, it is characterised in that: the roof and side wall of volute casing respectively with the outer end of blade
The gap for allowing blade radial and axial float is equipped between side, the volute casing two sidewalls are respectively equipped with the opposite ring of notch
The depth direction of connected in star, annular groove is axially parallel with pump shaft, between cell wall and pump shaft of the annular groove far from pump shaft
Distance be greater than blade outer end at a distance from pump shaft and volute casing side wall and blade-side that annular groove connects close to the cell wall of pump shaft
Horizontal distance between face is greater than and annular groove is far from the water between the cell wall of the pump shaft volute casing side wall to connect and blade side
Flat distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821783854.1U CN209067489U (en) | 2018-10-31 | 2018-10-31 | A kind of multi-level pump impeller assembling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821783854.1U CN209067489U (en) | 2018-10-31 | 2018-10-31 | A kind of multi-level pump impeller assembling structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209067489U true CN209067489U (en) | 2019-07-05 |
Family
ID=67097157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821783854.1U Active CN209067489U (en) | 2018-10-31 | 2018-10-31 | A kind of multi-level pump impeller assembling structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209067489U (en) |
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2018
- 2018-10-31 CN CN201821783854.1U patent/CN209067489U/en active Active
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