CN213838913U - Unbalanced wear-resisting mechanism and double-suction centrifugal pump comprising same - Google Patents
Unbalanced wear-resisting mechanism and double-suction centrifugal pump comprising same Download PDFInfo
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- CN213838913U CN213838913U CN202023004834.XU CN202023004834U CN213838913U CN 213838913 U CN213838913 U CN 213838913U CN 202023004834 U CN202023004834 U CN 202023004834U CN 213838913 U CN213838913 U CN 213838913U
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Abstract
The utility model provides a pair of unbalanced wear-resisting mechanism to a double suction centrifugal pump that contains this wear-resisting mechanism is disclosed, sets up different back of the body blade through the apron both sides at the pump impeller, makes the pump shaft only receive the axial force of a direction, thereby has avoided the pump shaft to receive the axial force of controlling the change and has damaged. The back blades which are the same with the rotation directions of the blades are arranged on two sides of the cover plate of the pump impeller, so that the impeller cover plate generates centrifugal force, solid particles are prevented from entering two sides of the sealing ring to enable the sealing ring to be abraded, liquid is prevented from leaking into an inner cavity of the pump from the sealing ring, leakage amount is greatly reduced, operation efficiency is increased, and the service life of the pump is prolonged.
Description
Technical Field
The utility model relates to a wear-resisting mechanism of unbalance and contain wear-resisting mechanism's double entry centrifugal pump belongs to machine parts technical field.
Background
The conventional double suction centrifugal pump adopts a completely symmetrical structure in design to prevent the left and right movement of a rotor part caused by the generation of axial force in the left and right directions, but in the actual production and manufacturing process, the axial force is generated due to the asymmetry generated by manufacturing errors and different pressure differences generated at two sides of an impeller in operation, and when the operation working condition is changed, the direction of the axial force is changed, so that the left and right movement axial force always exists on the rotor part, the changed axial force can enable parts on the rotor part to bear alternating stress, the alternating stress greatly damages the parts on the rotor, and the service life of the pump is reduced;
the sealing rings are installed on two sides of the impeller of the conventional double-suction centrifugal pump and can play a certain sealing role, but when a conveyed medium contains solid particles, once the solid particles enter two sides of the sealing rings, the sealing rings are easily abraded, conveyed liquid can be leaked to a low-pressure cavity from a high-pressure cavity in a large quantity, the leakage amount is larger, and the service life of the pump is shortened.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the above-mentioned defect that exists among the prior art and be not enough, provide a non-equilibrium wear-resisting mechanism and contain non-equilibrium wear-resisting mechanism's double suction centrifugal pump.
In order to solve the technical problem, the utility model provides a non-balance wear-resisting structure, including fixing back of the body blade one and back of the body blade two on pump impeller both ends apron respectively, the diameter of back of the body blade one is less than the diameter of back of the body blade two.
Further, the first back blade and the second back blade are concentric with the impeller.
Furthermore, the first back blade is fixed on the impeller cover plate and is integrally formed with the impeller.
Further, the first back blade comprises 4 first blade units, and the 4 first blade units are arc-shaped in the same direction.
Furthermore, the second back blade is fixed on the cover plate at the other end of the impeller and is integrally formed with the impeller.
Further, the second back blade comprises 4 second blade units, and the 4 second blade units are arcs in the same direction.
The utility model discloses still provide the double entry centrifugal pump who contains foretell unbalanced wear-resisting mechanism.
The utility model discloses the beneficial technological effect who reaches: the utility model provides a pair of unbalanced wear-resisting mechanism to a double suction centrifugal pump that contains this wear-resisting mechanism is disclosed, sets up different back of the body blade through the apron both sides at the pump impeller, makes the pump shaft only receive the axial force of a direction, thereby has avoided the pump shaft to receive the axial force of controlling the change and has damaged. The back blades which are the same with the rotation directions of the blades are arranged on two sides of the cover plate of the pump impeller, so that the impeller cover plate generates centrifugal force, solid particles are prevented from entering two sides of the sealing ring to enable the sealing ring to be abraded, liquid is prevented from leaking into an inner cavity of the pump from the sealing ring, leakage amount is greatly reduced, operation efficiency is increased, and the service life of the pump is prolonged.
Drawings
FIG. 1 is a schematic view of a non-equilibrium wear-resistant mechanism of the present invention;
FIG. 2 is a schematic diagram of the structure of the right side view of FIG. 1 of the present invention;
FIG. 3 is a left side view of the structure of FIG. 1;
fig. 4 is a schematic structural view of the unbalanced wear-resistant mechanism of the present invention assembled on a double-suction centrifugal pump.
Detailed Description
The invention is further described with reference to specific examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The following further describes the present invention with reference to the drawings and examples.
As shown in fig. 1-3, the utility model provides a non-balance wear-resisting structure, including fixing back of the body blade 1 and back of the body blade two 3 on pump impeller both ends apron respectively, the diameter of back of the body blade 1 is less than the diameter of back of the body blade two 3.
When the pump runs, the diameter of the second back blade 3 is larger, and the axial force generated at the second back blade 3 is larger than that generated at the first back blade 1, so that the cover plate at the second back blade 3 is subjected to one axial force, and the other side of the cover plate is not subjected to the axial force, thereby avoiding the damage of the shaft due to the left-right change of the axial force in the running process, prolonging the service life of the pump and reducing the maintenance cost of the pump. The back of the body blade 1 that sets up and the 4 soon of the vane of back of the body blade 3 to unanimous with the impeller are revolved to, and during the pump operation, vane and back of the body blade simultaneous working can produce a centrifugal force on the impeller apron, and the existence of this centrifugal force makes the solid particle in the transport medium can not enter into the sealing ring both sides to avoided the sealing ring wearing and tearing, and the liquid of carrying can not leak through the sealing ring, thereby reduced the leakage quantity of pump, improved the life of pump.
The first back blade and the second back blade are concentric with the impeller. The first back blade is fixed on the impeller cover plate and integrally formed with the impeller, so that the two back blades and the impeller cover plate are attached more tightly.
The first back blade comprises 4 first blade units, and the 4 first blade units are arc-shaped in the same direction. And the second back blade is fixed on the cover plate at the other end of the impeller and is integrally formed with the impeller. The second back blade comprises 4 second blade units, and the 4 second blade units are arcs in the same direction. The rotating direction of the circular arc is consistent with the rotating direction of the impeller blades.
In addition, as shown in fig. 4, the utility model discloses still provide the double entry centrifugal pump that contains foretell unbalanced wear-resisting mechanism. This centrifugal pump has avoided double suction centrifugal pump to receive the alternating stress damage at the during operation pump rotor to increase the life of pump, when avoiding conveying medium to contain solid particle, solid particle gets into the sealing ring both sides and makes the sealing ring wearing and tearing, reduces the leakage quantity of pump, improves the life of pump.
The present invention has been disclosed in the foregoing with reference to the preferred embodiments, but it is not intended to limit the present invention, and all technical solutions obtained by adopting equivalent replacement or equivalent transformation schemes fall within the protection scope of the present invention.
Claims (7)
1. A non-equilibrium wear-resistant structure is characterized in that: the back-vane type centrifugal pump impeller comprises a first back-vane and a second back-vane which are respectively fixed on cover plates at two ends of a pump impeller, wherein the diameter of the first back-vane is smaller than that of the second back-vane.
2. The unbalanced wear structure of claim 1, wherein: the first back blade and the second back blade are concentric with the impeller.
3. The unbalanced wear structure of claim 1, wherein: the first back blade is fixed on the impeller cover plate and is integrally formed with the impeller.
4. The unbalanced wear structure of claim 3, wherein: the first back blade comprises 4 first blade units, and the 4 first blade units are arc-shaped in the same direction.
5. The unbalanced wear structure of claim 1, wherein: and the second back blade is fixed on the cover plate at the other end of the impeller and is integrally formed with the impeller.
6. The unbalanced wear structure of claim 5, wherein: the second back blade comprises 4 second blade units, and the 4 second blade units are arcs in the same direction.
7. A double suction centrifugal pump comprising the unbalanced wear mechanism of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023004834.XU CN213838913U (en) | 2020-12-14 | 2020-12-14 | Unbalanced wear-resisting mechanism and double-suction centrifugal pump comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023004834.XU CN213838913U (en) | 2020-12-14 | 2020-12-14 | Unbalanced wear-resisting mechanism and double-suction centrifugal pump comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213838913U true CN213838913U (en) | 2021-07-30 |
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ID=76998266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023004834.XU Active CN213838913U (en) | 2020-12-14 | 2020-12-14 | Unbalanced wear-resisting mechanism and double-suction centrifugal pump comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213838913U (en) |
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2020
- 2020-12-14 CN CN202023004834.XU patent/CN213838913U/en active Active
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